WO2019223460A1 - 空调室内机及其控制方法 - Google Patents

空调室内机及其控制方法 Download PDF

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Publication number
WO2019223460A1
WO2019223460A1 PCT/CN2019/083099 CN2019083099W WO2019223460A1 WO 2019223460 A1 WO2019223460 A1 WO 2019223460A1 CN 2019083099 W CN2019083099 W CN 2019083099W WO 2019223460 A1 WO2019223460 A1 WO 2019223460A1
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Prior art keywords
air
indoor unit
air conditioner
conditioner indoor
induced draft
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PCT/CN2019/083099
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English (en)
French (fr)
Inventor
刘光朋
李英舒
曾福祥
于尊才
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青岛海尔空调器有限总公司
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Publication of WO2019223460A1 publication Critical patent/WO2019223460A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/81—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the air supply to heat-exchangers or bypass channels

Definitions

  • the invention relates to the technical field of air conditioning, in particular to an air conditioner indoor unit and a control method thereof.
  • the existing air-conditioning usually has a rapid cooling / heating function.
  • the compressor of the air conditioner works at a higher frequency to quickly increase the cooling capacity / heating capacity.
  • the indoor unit of the air conditioner operates at high speed and high air volume to return the cold / hot air after heat exchange to the room, thereby achieving indoor Fast temperature adjustment.
  • the rapid cooling / heating function of the air conditioner mentioned above solves the user's rapid cooling / heating needs to a certain extent, this air conditioner also inevitably has the following problems: the performance of traditional air conditioners (that is, the cooling / heating effect) and the wind Noise is a non-adjustable and contradictory solution.
  • the air conditioner increases the air supply volume to increase the cooling / heating effect. As the air supply volume increases, the noise also increases. However, if the noise reduction index is met, the air conditioner The performance will be limited to some extent.
  • the present invention provides an air conditioner indoor unit including a body, and the body is provided with heat.
  • the air conditioner indoor unit further includes a supplementary air module
  • the supplemental air module includes a casing, the casing is provided with a first air inlet, the casing is provided with an induced draft fan, and the supplementary air
  • the module is configured to be able to introduce indoor air into the housing through the first air inlet and be discharged to the air inlet side of the heat exchanger through the air outlet of the induced fan driven by the induced fan.
  • the air supply module further includes a connecting pipe, the housing is provided with a first through hole, and the body is provided with a second through hole. One end is connected to the air outlet of the induced draft fan, and the second end of the connection pipe extends through the first through hole and the second through hole and extends to the air inlet side of the heat exchanger.
  • the connecting pipe has a curved surface section.
  • the second end of the connection pipe has a bell mouth structure.
  • connection pipe is provided with a drainage plate, and the drainage plate can introduce nearby air into the connection pipe when the induced fan is in operation.
  • the cross-section of the drainage plate is arc-shaped, and the arc-shaped shape can draw nearby air to the direction of the second end of the connection pipe.
  • a second air inlet is further provided on the casing near the drainage plate.
  • the first air inlet is provided with an air inlet grill, and the air inlet grill can draw indoor air to the air inlet of the air draught fan.
  • the air-conditioning indoor unit is a wall-mounted air-conditioning indoor unit, and the air supplement module is detachably disposed on the back of the body.
  • the present invention also provides a control method of an air conditioner indoor unit.
  • the control method includes:
  • the air-conditioning indoor unit includes a body, and a heat exchanger and a blower are provided in the body.
  • the air-conditioning indoor unit further includes an air supply module, and the air supply module includes a casing.
  • the casing is provided with a first air inlet, and the casing is provided with an induced draft fan.
  • the air supply module is configured to be able to introduce indoor air into the casing through the first inlet and driven by the induced draft fan. It is discharged to the air inlet side of the heat exchanger.
  • the present invention can significantly reduce the noise of the air-conditioning indoor unit when it is operated at a large air volume.
  • the performance of the air-conditioning indoor unit depends on the heat exchange efficiency, and the heat exchange efficiency is directly related to the air supply volume.
  • the supplementary air module of the present invention can directly send indoor air into the heat exchanger to participate in the cycle, which reduces the air-conditioning indoor The working pressure of the blower inside the machine.
  • the present invention solves the problem of high noise in the prior art when the air conditioner is operated at a large air volume, and has a simple structure and a significant effect, which is suitable for large-scale popularization and use.
  • FIG. 1 is a schematic structural diagram of a wall-mounted air conditioner indoor unit according to a first embodiment of the present invention
  • FIG. 2 is an exploded schematic view of a wall-mounted air conditioner indoor unit according to a first embodiment of the present invention
  • FIG. 3 is a cross-sectional view of FIG. 1 at A-A;
  • FIG. 4 is a working principle diagram of a wall-mounted air conditioner indoor unit according to a first embodiment of the present invention, which shows a suction process of a draft fan;
  • FIG. 5 is a working principle diagram of a wall-mounted air-conditioning indoor unit according to a first embodiment of the present invention, which illustrates a process of supplementing air of the wall-mounted air-conditioning indoor unit;
  • FIG. 6 is an exploded view of a wall-mounted air conditioner indoor unit in a second embodiment of the present invention.
  • FIG. 7 is a working principle diagram of a wall-mounted air conditioner indoor unit in a second embodiment of the present invention, which shows the suction process of a draft fan;
  • FIG. 8 is a flowchart of a method for controlling a wall-mounted air conditioner indoor unit according to the present invention.
  • first air inlet in the drawings is provided on the front and back sides of the housing, this positional relationship is not static, and those skilled in the art can adjust it as needed to suit specific applications.
  • first air inlet can also be provided on the top or bottom surface of the casing.
  • the terms “installation”, “connected”, and “connected” should be understood in a broad sense. For example, they may be fixed connections or It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
  • installation should be understood in a broad sense. For example, they may be fixed connections or It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
  • the specific meanings of the above terms in the present invention can be understood according to specific situations.
  • the present invention proposes a wall-mounted air conditioner indoor unit, so as to reduce the noise of the air conditioner indoor unit and increase the amount of induced air, thereby breaking the traditional air conditioner indoor unit.
  • the deadlock where air volume and noise reduction cannot be achieved at the same time improves the user experience.
  • FIGS. 1 to 5 are schematic structural diagram of a wall-mounted air-conditioning indoor unit according to the first embodiment of the present invention
  • FIG. 2 is an exploded schematic view of the wall-mounted air-conditioning indoor unit according to the first embodiment of the present invention
  • Sectional view at AA FIG. 4 is a working principle diagram of the wall-mounted air conditioner indoor unit in the first embodiment of the present invention, which shows the suction process of the induced draft fan
  • FIG. 5 is the first embodiment of the present invention.
  • the working principle diagram of the wall-mounted air-conditioning indoor unit shows the air supply process of the wall-mounted air-conditioning indoor unit.
  • the wall-mounted air conditioner indoor unit (hereinafter referred to as an indoor unit) of the present invention mainly includes a main body 1 and an air supply module 2 installed outside the main body 1.
  • An air return port 11 and an air supply port are provided in the main body 1 12.
  • the air supplement module 2 is installed close to the back of the indoor unit and includes a casing 21.
  • the casing 21 is provided with a first air inlet 211.
  • the casing 21 is provided with an induced draft fan 23 and a connecting pipe 25.
  • the induced draft fan 23 has a suction The air outlet and the air outlet, the first end of the connection pipe 25 is connected to the induced draft fan 23, and the second end extends to the air inlet side of the heat exchanger 13.
  • the supplementary air module 2 is configured to be able to introduce indoor air into the casing 21 through the first air inlet 211 under the driving of the induced draft fan 23, and then pass through the suction port of the induced draft fan 23, the exhaust port of the induced draft fan 23, and the connection pipe 25 in this order. It is then discharged from the second end of the connection pipe 25 to the air inlet side of the heat exchanger 13.
  • the cross-flow fan 14 inside the indoor unit and the induced-air fan 23 in the air induction module rotate at a medium and low speed at the same time, and a part of the indoor air is in the cross-flow fan 14.
  • the air inlet 11 After being driven by the air inlet 11 into the body 1 and passing through the heat exchanger 13, it is sent into the room from the air inlet 12; the other part of the indoor air is driven by the induced draft fan 23 into the casing 21 from the first air inlet 211, and sequentially After passing through the air inlet of the induced fan 23, the air outlet 230 of the induced fan 23, and the connecting pipe 25, the second end of the connecting pipe 25 is discharged to the air inlet side of the heat exchanger 13 and mixed with the indoor air introduced by the cross-flow fan 14. It is then sent into the room through the air outlet 12.
  • the indoor unit of the present invention can start the induced fan 23 and the cross-flow fan 14 at the same time at low and medium speeds during operation, greatly reducing the noise of the indoor unit when the cross-flow fan 14 operates at high speed alone. That is to say, the present invention solves the problem of high noise in the air conditioner in the prior art when the air volume is running, and the air supply module 2 has a simple structure and a significant effect, and can increase the number of embedded devices without affecting the aesthetics of the indoor unit. Supply air volume, auxiliary air-conditioning for cooling / heating, suitable for large-scale popularization.
  • the housing 21 is a substantially rectangular parallelepiped, which includes a front cover 21 a and a rear cover 21 b.
  • the front cover 21 a can be snapped and bonded. , Screw connection, etc., and are fastened to the rear cover 21b.
  • the front cover 21a can be connected to the body 1 in the same manner.
  • the front cover 21a and the rear cover 21b are provided with first air inlets 211 on the front and rear sides.
  • the first air inlet 211 is provided with an air inlet grill (not shown in the figure).
  • the air is drawn to the air intake of the induced draft fan 23, such as the inlet grille on the front cover 21a is inclined to the left to direct the air to the left of the air intake of the induced draft fan 23 (that is, the left of the air intake in FIG. 2). The same applies to the side and the bottom).
  • the inlet grille on the rear cover 21b is arranged in a straight line or slightly inclined to the right so as to direct air to the front of the air inlet of the induced draft fan 23.
  • the induced draft fan 23 is preferably a centrifugal fan, which includes a volute 231, a motor 232, and a fan 233.
  • the fan 233 is formed with an air inlet, and the volute 231 is provided with an air outlet 230.
  • a first through hole 213 is provided at the upper part of the right side surface of the front cover 21a, and a second through hole 214 is provided at a corresponding position on the body 1.
  • the first end of the connection pipe 25 is connected to the exhaust port of the induced draft fan 23, and is connected.
  • the second end of the tube 25 extends through the first through hole 213 and the second through hole to the air inlet side of the heat exchanger 13.
  • the pipe between the first end and the second end of the connecting pipe 25 has an arc section 252, that is, the cross section of the pipe is arc-shaped, and the second end of the connecting pipe 25 has a bell mouth structure.
  • a plurality of drainage plates 251 are also provided in the connecting pipe 25, and a second air inlet 212 (see FIG. 1) is also provided on the casing 21 near the drainage plate 251, as shown in FIG.
  • the second air inlet 212 is opened above the connecting pipe 25.
  • the draft plate 251 can introduce nearby indoor air into the connection pipe 25 and mix it with the air flow from the draft fan 23 and eject it from the second end of the connection pipe 25.
  • the drainage plate 251 is preferably in a concave arc shape in cross section, so that when the indoor air flows through the curved drainage plate 251 from above the drainage plate 251, it can be better guided to the first connection tube 25. Both ends.
  • the air supply module 2 can be controlled separately.
  • the air supply module 2 is equipped with an electric control component (not shown in the figure).
  • the remote control for the air supply module 2 or a mobile APP is used to control the electric control component.
  • the buttons on the air conditioner remote control for controlling the air supply module 2 are reserved in advance, and the main control component is directly connected to the air conditioner through the air conditioner remote control.
  • the device reserves an interface to implement air-to-air supply module 2 control.
  • the above arrangement has the advantage that, through the setting of the supplementary air module 2, when the indoor unit is operating, the induced draft fan 23 and the cross-flow fan 14 are operated together at a low and medium speed instead of the high-speed operation of the cross-flow fan 14, so that the air supply volume is adjusted. In the case of constant or even increase, the noise is greatly reduced.
  • the cross-flow fan 14 After repeated experiments, observations, analysis, and comparisons by the inventors, it has been found that, for the cross-flow fan 14, the higher the rotation speed, the greater the noise. When the rotation speed increases to the maximum speed, the air flow accelerates and the vibration increases significantly. The noise generated by the machine will increase geometrically.
  • the induced draft fan 23 can share the air supply volume for the cross-flow fan 14, thereby greatly reducing the amount of air in the indoor unit of the air conditioner while providing the same air supply volume.
  • the noise generated by the high-speed fan at high speed ensures that the operating performance of the air conditioner is unchanged or even improved.
  • the setting of the drainage plate 251 makes full use of the Venturi effect. When the air flow passes through the connecting pipe 25, the air pressure is large. The rapid flow of air will cause a negative pressure near the drainage plate 251, and the indoor air flow will follow the drainage.
  • the plate 251 is sucked into the jet flow channel and the air flow is smoothly mixed, so that the airflow can be further increased while the speed of the induced draft fan 23 and the cross-flow fan 14 is maintained, or the induced draft fan 23 can be ensured while the supply airflow is guaranteed.
  • the rotational speed of the cross-flow fan 14 can be further reduced, and the noise can be further reduced.
  • the arc-shaped cross section of the drainage plate 251 reduces the on-line loss during the drainage and the friction loss when mixing with the air flow in the jet channel, which effectively improves the air intake.
  • the connecting pipe 25 has a curved surface section and a second end with a bell mouth, so that the air flow discharged from the exhaust port of the induced draft fan 23 can be smoothly transferred into the jet channel, thereby reducing loss along the way.
  • the inlet grille can draw the indoor air to the suction port of the draft fan 23, which can make the draft fan 23 suck the wind more smoothly, increase the suction volume, and then increase the air supply volume.
  • the air supply module 2 can be installed outside the body 1 of the existing wall-mounted air-conditioning indoor unit, this also enables the air supply module 2 of the present invention to be sold separately, and the user does not need to spend a higher cost to purchase a new low-noise
  • the air conditioner can be installed outside the main body 1 of the indoor unit of the air conditioner with only a small purchase cost and modification cost, which greatly expands the application scenario of the present invention and is suitable for large-scale promotion and use.
  • the cross section of the drainage plate 251 can be set to other straight lines or arcs, as long as the shape can reduce the loss along the course of the drainage; for another example, the supplementary air module 2 may not be provided with the connection pipe 25, but instead The air outlet of the induced draft fan 23 is directly communicated with the second through hole of the main body 1; for another example, the connecting pipe 25 may not have a curved surface section, but may be replaced by a right-angled section, and the second end of the connecting pipe 25 may not be provided with a horn Port structure, etc .; for another example, the induced draft fan 23 can also use other such as axial flow fans or mixed flow fans.
  • a purifying component may be provided in the casing 21 to circulate and purify the indoor air, improve the cleanliness of the indoor air, and reduce floating particles in the air.
  • the purification component includes a partition and a filter layer, and the partition is sealedly connected to the casing 21 so as to separate the casing 21 into a first chamber and a second chamber; a filter hole is formed in the partition, and the filter layer is disposed in the first chamber. The filter hole is covered, and the induced draft fan 23 is disposed in the second chamber, and the air suction port is provided corresponding to the filter hole.
  • the filter layer is a filter structure that can adsorb or decompose harmful gases in the air, such as HEPA filters or activated carbon filters.
  • HEPA filters usually include three layers of filter layers (primary filter layer, charged layer, electrostatic dust collection layer). The removal efficiency of particles with a diameter of 0.3 microns or less can reach 99.97% or more. In this way, when the induced draft fan 23 is operated, the indoor air is first filtered through the filter layer and then sucked by the induced draft fan 23.
  • FIG. 6 is an exploded schematic diagram of a wall-mounted air-conditioning indoor unit in a second embodiment of the present invention
  • FIG. 7 is a working principle diagram of a wall-mounted air-conditioning indoor unit in a second embodiment of the present invention. Suction process of the fan.
  • two induced draft fans 23 and two connecting pipes 25 may also be provided in the housing 21, corresponding to Ground, the housing 21 is provided with two first through holes 213, and the body 1 is provided with two second through holes.
  • the induced draft fan 23 is symmetrically disposed in the casing 21.
  • the two induced draft fans 23 and the cross-flow fan 14 can achieve the same air supply volume at a smaller rotational speed, thereby further reducing the noise generated by the indoor unit when the air supply volume is large and improving the user.
  • the two induced draft fans 23 and the cross-flow fan 14 can achieve the same air supply volume at a smaller rotational speed, thereby further reducing the noise generated by the indoor unit when the air supply volume is large and improving the user.
  • FIG. 8 is a flowchart of a method for controlling a wall-mounted air conditioner indoor unit according to the present invention.
  • control method of the air-conditioning indoor unit of the present invention mainly includes the following steps:
  • S100 Obtain a set wind speed of the indoor unit. For example, by obtaining the set wind speed from the set parameters when the user selects the operating mode of the air conditioner, or when the wind speed of the indoor unit is set to automatic wind speed, the current operating wind speed is automatically obtained as the set wind speed;
  • the induced draft fan 23 and the cross-flow fan 14 are controlled to run simultaneously at the first set speed and the second set speed, respectively.
  • the wind speed threshold may be the high speed or the wind speed corresponding to the high speed of the cross-flow fan 14 when operating alone.
  • the control module of the indoor unit controls the induced draft fan 23 and the cross-flow fan 14 at the same time at low and medium speeds. Start operation to reduce the noise generated by the indoor unit.
  • the low speed is lower than the medium speed
  • the medium speed is lower than the high speed.
  • the control module of the indoor unit controls the induced draft fan 23 and the cross-flow fan 14 at the same time at a first set speed and a second set speed that are smaller than the wind speed threshold. Run at the same time.
  • the first set speed and the second set speed may be the same, or may be set based on experiments, such as a certain proportional relationship between the first set speed and the second set speed to ensure the induced fan 23 Noise is minimized when the cross-flow fan 14 is turned on simultaneously.
  • the wind speed threshold can also be adjusted according to different models and use environments, and the adjustment should be mainly based on the noise value when the cross-flow fan 14 is operated alone.
  • air-conditioning indoor unit of the present invention is described in conjunction with a wall-mounted air-conditioning indoor unit, it is obvious that the air supply module of the present invention can also be applied to other air-conditioning indoor units, such as a cabinet-type air-conditioning indoor unit.

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Abstract

一种空调室内机及其控制方法，该空调室内机包括本体，本体内设置有热交换器和送风机，空调室内机还包括补风模块，补风模块包括壳体，壳体上设置有第一进风口，壳体内设置有引风机，补风模块设置成能够在引风机的带动下，将室内空气通过第一进风口引入壳体，并通过引风机的排风口排出至热交换器的进风侧。通过补风模块的设置，能够大幅降低空调室内机运转时产生的噪音。

Description

空调室内机及其控制方法 技术领域
本发明涉及空气调节技术领域，具体涉及一种空调室内机及其控制方法。
背景技术
随着生活水平的日益提高，人们对于生活质量的要求也越来越高，这种要求在家用电器上体现得尤为明显。以空调为例，当室内外温差较大时，为了满足用户从室外进入室内后快速制冷/制热的需求，现有的空调通常都具有快速制冷/制热功能，在开启快速制冷/制热功能时，空调的压缩机工作在较高的频率以快速提升制冷量/制热量，空调室内机以高转速、大风量运行将热交换后的冷空气/热空气送回室内，从而实现对室内温度的快速调节。
虽然上述空调的快速制冷/制热功能在一定程度上解决了用户的快速制冷/制热需求，但是这种空调也不可避免地存在如下问题：传统空调的性能(即制冷/制热效果)和风噪是一对不可调和矛盾，空调通过加大送风量提升制冷/制热效果的方案，使得送风量增大的同时，噪音也随之变大；但是如果满足了降噪指标，那么空调的性能在一定程度上又会受到限制。这些问题在图书馆、病房、失眠人群的房间等一些特殊的应用场景中尤为明显。也就是说，现有的空调在送风量大时存在噪音大的问题。
相应地，本领域需要一种新的空调室内机及其控制方法来解决上述问题。
发明内容
为了解决现有技术中的上述问题，即为了解决现有的空调在送风量大时存在的噪音大的问题，本发明提供了一种空调室内机，包括本体，所述本体内设置有热交换器和送风机，所述空调室内机还包括补风模块，所述补风模块包括壳体，所述壳体上设置有第一进风口，所述壳体内设置有引风机，所述补风模块设置成能够在所述引风机的带动下，将室内空气通过所述第一进风口引入所述壳体，并通过所述引风机的排风口排出至所述热交换器的进风侧。
在上述空调室内机的优选技术方案中，所述补风模块还包括连接管，所述壳体上设置有第一通孔，所述本体上设置有第二通孔，所述连接管的第一端与所述引风机的排风口连接，所述连接管的第二端穿过所述第一通孔和所述第二通孔后延伸至所述热交换器的进风侧。
在上述空调室内机的优选技术方案中，所述连接管具有弧面段。
在上述空调室内机的优选技术方案中，所述连接管的第二端具有喇叭口结构。
在上述空调室内机的优选技术方案中，所述连接管设置有引流板，所述引流板能够在所述引风机工作时将附近的空气引入所述连接管。
在上述空调室内机的优选技术方案中，所述引流板的截面为弧形，所述弧形能够将附近的空气向所述连接管的第二端的方向引流。
在上述空调室内机的优选技术方案中，所述壳体上靠近所述引流板的位置还开设有第二进风口。
在上述空调室内机的优选技术方案中，所述第一进风口设置有进风格栅，所述进风格栅能够将室内空气引流至所述引风机的吸风口。
在上述空调室内机的优选技术方案中，所述空调室内机为壁挂式空调室内机，所述补风模块以可拆卸的方式设置于所述本体的背面。
本发明还提供了一种空调室内机的控制方法，所述控制方法包括：
获取所述空调室内机的设定风速；
在所述设定风速大于风速阈值时，控制所述引风机和所述送风机分别以第一设定转速和第二设定速度同时运行。
本领域技术人员能够理解的是，在本发明的优选技术方案中，空调室内机包括本体，本体内设置有热交换器和送风机，空调室内机还包括补风模块，补风模块包括壳体，壳体上设置有第一进风口，壳体内设置有引风机，补风模块设置成能够在引风机的带动下，将室内空气通过第一进风口引入壳体，并通过引风机的排风口排出至热交换器的进风侧。
通过在空调室内机上设置补风模块，本发明能够明显降低空调室内机在大风量运行时的噪音。具体而言，空调室内机的性能取决于换热效率，而换热效率与送风量有直接关系，本发明的补风模块可直接将室内空气送入热交换器参与循环，减轻了空调室内机内送风机的工作压力。经发明人反复试验、观测、分析和比较发现，在同时启动空调室内机中的送风机和补风模块中的 引风机时，空调室内机能够通过引风机和送风机同时中低速运转分担送风量，从而在提供相同送风量的前提下，大幅度降低空调室内机中的送风机单独高速运行时产生的噪音，保证空调的运行性能不变甚至有所提高。也就是说，本发明解决了现有技术中空调在大风量运行时存在的噪音大的问题，并且结构简单，效果显著，适宜大规模推广使用。
附图说明
下面参照附图并结合壁挂式空调室内机来描述本发明的空调室内机及其控制方法。附图中：
图1为本发明的第一种实施例中壁挂式空调室内机的结构示意图；
图2为本发明的第一种实施例中壁挂式空调室内机的爆炸示意图；
图3为图1在A-A处的剖视图；
图4为本发明的第一种实施例中壁挂式空调室内机的工作原理图，其示出了引风机的吸风过程；
图5为本发明的第一种实施例中壁挂式空调室内机的工作原理图，其示出了壁挂式空调室内机的补风过程；
图6为本发明的第二种实施例中壁挂式空调室内机的爆炸示意图；
图7为本发明的第二种实施例中壁挂式空调室内机的工作原理图，其示出了引风机的吸风过程；
图8为本发明的壁挂式空调室内机的控制方法的流程图。
附图标记列表
1、本体；11、回风口；12、送风口；13、热交换器；14、贯流风机；2、补风模块；21、壳体；21a、前罩壳；21b、后罩壳；211、第一进风口；212、第二进风口；213、第一通孔；214、第二通孔；23、引风机；230、排风口；231、蜗壳；232、电机；233、风扇；25、连接管；251、引流板；252、弧面段。
具体实施方式
下面参照附图来描述本发明的优选实施例。本领域技术人员应当理解的是，这些实施例仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。例如，虽然附图中的第一进风口是设置在壳体的前后两个侧面，但是这种位置关系非一成不变，本领域技术人员可以根据需要对其作出调整， 以便适应具体的应用场合。例如，第一进风口还可以设置在壳体的顶面或底面等。
需要说明的是，在本发明的描述中，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方向或位置关系的术语是基于附图所示的方向或位置关系，这仅仅是为了便于描述，而不是指示或暗示所述装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。
此外，还需要说明的是，在本发明的描述中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域技术人员而言，可根据具体情况理解上述术语在本发明中的具体含义。
为解决现有空调在送风量大时存在送风噪音大的问题，本发明提出一种壁挂式空调室内机，以便在降低空调室内机的噪音的同时增加引风量，打破传统空调室内机的送风量和降噪不可兼得的僵局，提升用户使用体验。
首先参照图1至图5，对本发明的壁挂式空调室内机的第一种实施例进行描述。其中，图1为本发明的第一种实施例中壁挂式空调室内机的结构示意图；图2为本发明的第一种实施例中壁挂式空调室内机的爆炸示意图；图3为图1在A-A处的剖视图；图4为本发明的第一种实施例中壁挂式空调室内机的工作原理图，其示出了引风机的吸风过程；图5为本发明的第一种实施例中壁挂式空调室内机的工作原理图，其示出了壁挂式空调室内机的补风过程。
如图1至图3所示，本发明的壁挂式空调室内机(以下简称室内机)主要包括本体1和安装在本体1外的补风模块2，本体1内设置有回风口11、送风口12、热交换器13、贯流风机14(即送风机)、控制模块(图中未示出)等。补风模块2紧贴于室内机的背面安装，其包括壳体21，壳体21上设置有第一进风口211，壳体21内设置有引风机23和连接管25，引风机23具有吸风口和排风口，连接管25的第一端与引风机23连接，第二端延伸至热交换器13的进风侧。补风模块2设置成能够在引风机23的带动下，将室 内空气通过第一进风口211引入壳体21，并依次经过引风机23的吸风口、引风机23的排风口和连接管25后从连接管25的第二端排出至热交换器13的进风侧。
参照图4、图5并结合图1至图3，室内机工作时，室内机内部的贯流风机14与引风模块中的引风机23同时以中低速转动，一部分室内空气在贯流风机14的带动下从回风口11进入本体1并穿过热交换器13后，从送风口12送入室内；另一部分室内空气在引风机23的带动下从第一进风口211进入壳体21，并依次经过引风机23的吸风口、引风机23的排风口230、连接管25后，通过连接管25的第二端排出至热交换器13的进风侧与贯流风机14引入的室内空气混合后由送风口12送入室内。
通过上述描述可以看出，本发明的室内机能够在运行时通过同时启动引风机23和贯流风机14同时以中低速运转，大幅度降低室内机在贯流风机14单独高速运行时的噪音。也就是说，本发明解决了现有技术中空调在大风量运行时存在的噪音大的问题，并且补风模块2结构简单，效果显著，能够在不影响室内机美观性的同时嵌入式的增加送风量，辅助空调进行制冷/制热，适宜大规模推广使用。
参照图2并按照图2所示方位，在一种可能的实施例中，壳体21大致成长方体，其包括前罩壳21a和后罩壳21b，前罩壳21a能够通过卡接、粘接、螺接等方式与后罩壳21b紧固连接。类似地，前罩壳21a能够以相同的方式与本体1连接。前罩壳21a和后罩壳21b的前后两个侧面均开设有第一进风口211，第一进风口211处设置有进风格栅(图中未示出)，进风格栅能够将室内空气引流至引风机23的吸风口，如前罩壳21a上的进风格栅向左斜置以便将空气向左导流至引风机23的吸风口的前方(即图2中吸风口的左侧，下同)，后罩壳21b上的进风格栅直线设置或稍稍向右斜置以便将空气导流至引风机23的吸风口的前方。引风机23优选地为离心风机，其包括蜗壳231、电机232和风扇233，风扇233形成有吸风口，蜗壳231上设置有排风口230。前罩壳21a的右侧面上部设置有第一通孔213，本体1上相对应的位置设置有第二通孔214，连接管25的第一端与引风机23的排风口连接，连接管25的第二端穿过第一通孔213与第二通孔延伸至热交换器13的进风侧。连接管25的第一端与第二端之间的管道具有弧面段252，即管道的截面为弧形，连接管25的第二端具有喇叭口结构。
参照图3并按照图3所示方位，连接管25内还设置有多个引流板251，壳体21上靠近引流板251的位置还开设有第二进风口212(参照图1)，如第二进风口212开设在连接管25的上方。引流板251能够将附近的室内空气引入连接管25并与来自引风机23的空气流混合后从连接管25的第二端喷射出。如图3所示，引流板251优选地横截面为下凹的弧形，以便室内空气从引流板251的上方流过该弧形引流板251时能够更好地被引导向连接管25的第二端。
在控制方式上，补风模块2可以单独控制，例如补风模块2内部配置有电控组件(图中未示出)，为补风模块2配置遥控器或使用手机APP等方式对电控组件进行控制，也可以将补风模块2与空调器结合控制，例如在空调遥控器上事先预留用于控制补风模块2内的按键，通过空调遥控器直接、或将主控组件连接至空调器预留接口的方式实现空对补风模块2的控制。
上述设置的优点在于：通过补风模块2的设置，使得室内机在运转时，引风机23和贯流风机14共同运转在中低转速代替贯流风机14的单独高速运转，从而在送风量不变甚至增大的情形下，大幅度减小噪音。经发明人反复试验、观测、分析和比较发现，对于贯流风机14来说，转速越高，噪音越大，当转速增大至最大转速附近时，由于空气流动加快、震动明显增大，室内机产生的噪音会呈几何级的增长。而使贯流风机14和引风机23同时运行在中低速时，引风机23能够为贯流风机14分担送风量，从而在提供相同送风量的前提下，大幅度降低空调器室内机中的风机高速运行时产生的噪音，保证空调的运行性能不变甚至有所提高。引流板251的设置，充分利用了文丘里效应，当空气流从连接管25内流过时，气流的气压大，气流的快速流动会使引流板251附近产生负压，室内气流就会顺着引流板251被吸入射流通道与空气流平稳混合，从而能够在保持引风机23和贯流风机14转速不变的前提下，进一步增大风量，或在保证送风量的前提下，使得引风机23和贯流风机14的转速能够进一步降低，进一步降低噪音。引流板251截面为弧形的设置方式，则减少了引流过程中的沿程损失以及与射流通道内空气流混合时的摩擦损失，有效地提升了进风量。
此外，连接管25的管道具有弧面段以及第二端具有喇叭口的设置方式，使得引风机23排气口排出的气流能够顺利过渡至射流通道内，减少沿程损失。进风格栅能够将室内空气引流至引风机23的吸风口的设置方式，能够 使引风机23吸风更加顺利，增加吸风量，进而增大送风量。并且，由于补风模块2能够设置于现有的壁挂式空调室内机的本体1外，这还使得本发明的补风模块2能够单独出售，用户无需花费更高的成本购买一台新的低噪音空调，而是只花费很小的购买成本和改造成本即可将补风模块2安装于空调室内机的本体1外，大大拓展了本发明的应用场景，适宜大规模推广使用。
当然，上述实施例仅仅用来阐述本发明的原理，并非旨在于限制本发明的保护范围，在不偏离本发明原理的条件下，本领域技术人员可以对上述实施例进行调整，以便本发明能够应用于更加具体的应用场景。例如，引流板251的截面可以设置为其他直线或弧线，只要该形状能够减小引流过程中的沿程损失即可；再如，补风模块2也可以不设置连接管25，而是将引风机23的排风口直接与本体1的第二通孔连通；再如，连接管25可以不具有弧面段，而是采用直角段代替，连接管25的第二端也可以不设置喇叭口结构等；再如，引风机23还可以采用其他如轴流风机或混流风机等。
再如，在壳体21内还可以设置净化组件，以便对室内空气进行循环净化和过滤，提高室内空气的清洁度，减少空气中的浮游颗粒。如净化组件包括隔板和过滤层，隔板与壳体21密封连接从而将壳体21分隔为第一腔室和第二腔室；隔板上开设过滤孔，过滤层设置于第一腔室并覆盖该过滤孔，引风机23设置于第二腔室，其吸风口与过滤孔对应设置。过滤层为可以吸附或分解空气中有害气体的过滤结构，如HEPA过滤器或活性炭滤网等，HEPA过滤器通常包括三层过滤层(初级过滤层、荷电层、静电集尘层)，对直径为0.3微米以下的微粒去除效率可达到99.97％以上。如此一来，在引风机23运转时，室内空气先经过过滤层进行过滤后，被引风机23吸入。
下面参照图6和图7，对本发明的第二种实施例中壁挂式空调室内机进行描述。其中，图6为本发明的第二种实施例中壁挂式空调室内机的爆炸示意图；图7为本发明的第二种实施例中壁挂式空调室内机的工作原理图，其示出了引风机的吸风过程。如图6和图7所示，在另一种可能的实施例中，在其他设置方式不变的条件下，还可以在壳体21内设置两个引风机23和两个连接管25，对应地，壳体21上设置有两个第一通孔213，本体1上开设有两个第二通孔。其中，引风机23对称的设置于壳体21内。这样一来，在室内机工作时，两个引风机23与贯流风机14能够以更小的转速实现相同的送风量，从而进一步减小送风量大时室内机产生的噪音，改善用户体验。
下面参照图8，对本发明的壁挂式空调室内机的控制方法进行阐述。其中，图8为本发明的壁挂式空调室内机的控制方法的流程图。
如图8所示，本发明的空调室内机的控制方法主要包括以下步骤：
S100、获取室内机的设定风速。例如，通过在用户选择空调的运行模式时从设定的参数中获取设定风速，或在室内机的风速设置为自动风速时，自动获取当前的运行风速作为设定风速；
S200、在设定风速大于风速阈值时，控制引风机23和贯流风机14分别以第一设定转速和第二设定速度同时运行。例如，风速阈值可以为高速或贯流风机14在单独运行时高转速对应的风速等，在设定风速大于风速阈值时，室内机的控制模块控制引风机23和贯流风机14同时以中低速启动运行，以降低室内机产生的噪音。本领域技术人员均可以理解，低速低于中速，中速低于高速。换言之，当室内机的设定风速大于一预设的风速阈值时，室内机的控制模块控制引风机23和贯流风机14同时以小于该风速阈值的第一设定转速和第二设定速度同时运行。
其中，第一设定速度和第二设定速度可以相同，也可以基于试验等方式进行设置，如第一设定转速和第二设定转速之间成一定的比例关系，以确保引风机23和贯流风机14同时开启时的噪音最小。显然，风速阈值还可以根据不同机型和使用环境进行调整，并且该调整应当主要基于贯流风机14单独运转时的噪音值进行。
最后需要说明的是，虽然本发明的空调室内机是结合壁挂式空调室内机进行描述的，但是显然本发明的补风模块还可以应用于其他空调室内机，如柜式空调室内机等。
至此，已经结合附图所示的优选实施例描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施例。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。

Claims (10)

  1. 一种空调室内机，包括本体，所述本体内设置有热交换器和送风机，其中，所述空调室内机还包括补风模块，所述补风模块包括壳体，所述壳体上设置有第一进风口，所述壳体内设置有引风机，所述补风模块设置成能够在所述引风机的带动下，将室内空气通过所述第一进风口引入所述壳体，并通过所述引风机的排风口排出至所述热交换器的进风侧。
  2. 根据权利要求1所述的空调室内机，其中，所述补风模块还包括连接管，所述壳体上设置有第一通孔，所述本体上设置有第二通孔，所述连接管的第一端与所述引风机的排风口连接，所述连接管的第二端穿过所述第一通孔和所述第二通孔后延伸至所述热交换器的进风侧。
  3. 根据权利要求2所述的空调室内机，其中，所述连接管具有弧面段。
  4. 根据权利要求2所述的空调室内机，其中，所述连接管的第二端具有喇叭口结构。
  5. 根据权利要求2至4中任一项所述的空调室内机，其中，所述连接管设置有引流板，所述引流板能够在所述引风机工作时将附近的空气引入所述连接管。
  6. 根据权利要求5所述的空调室内机，其中，所述引流板的截面为弧形，所述弧形能够将附近的空气向所述连接管的第二端的方向引流。
  7. 根据权利要求5所述的空调室内机，其中，所述壳体上靠近所述引流板的位置还开设有第二进风口。
  8. 根据权利要求1所述的空调室内机，其中，所述第一进风口设置有进风格栅，所述进风格栅能够将室内空气引流至所述引风机的吸风口。
  9. 根据权利要求1所述的空调室内机，其中，所述空调室内机为壁挂式空调室内机，所述补风模块以可拆卸的方式设置于所述本体的背面。
  10. 一种空调室内机的控制方法，其中，所述空调室内机为根据权利要求1至9中任一项所述的空调室内机，所述控制方法包括：
    获取所述空调室内机的设定风速；
    在所述设定风速大于风速阈值时，控制所述引风机和所述送风机分别以第一设定转速和第二设定速度同时运行。
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