WO2018148941A1

WO2018148941A1 - Air duct and air treatment device

Info

Publication number: WO2018148941A1
Application number: PCT/CN2017/073965
Authority: WO
Inventors: 大森宏; 王文鹏; 岳宝
Original assignee: 美的集团股份有限公司
Priority date: 2017-02-17
Filing date: 2017-02-17
Publication date: 2018-08-23
Also published as: CN109073250A; CN109073250B

Abstract

An air duct and an air treatment device. A flow deflector (4) is disposed in the air duct. The flow deflector (4) forms a zigzag channel having a growing flow length in the air duct, an airflow flowing from the windward end of the air duct flows in the zigzag channel and flows out from the outlet end, and the flow deflector (4) is preferably extending spirally along the axial direction to form a spiral channel. Because the zigzag channel is formed by arranging the flow deflector (4), the bending and winding of the zigzag channel allow the flowing process to increase, accordingly, a gas to be purified can have a long time for reacting with an electrostatic precipitation structure disposed in the zigzag channel when the gas to be purified flows through the zigzag channel, and the electrostatic precipitation effect is better. Moreover, a great wind flow of high speed is buffered when the wind passes through the zigzag channel, thereby avoiding direct impact to a fan in the air treatment device and great noise and vibration of the whole machine caused by the direct impact.

Description

Air duct and air handling equipment

Technical field

The present invention relates to an air treatment apparatus, and in particular to a duct. In addition, the present invention also relates to an air treatment apparatus having such a purifying duct.

Background technique

Air pollution problems have become more and more prominent in today's society, seriously endangering people's health. In order to cope with the worsening air pollution problems, various air treatment equipments are widely used in homes, office buildings, hospitals, schools, etc. It is an air treatment device with wide application and strong practicability. At present, the products in the fresh air industry are mainly based on the central fresh air system. In addition, wall-mounted, cabinet-type new fans and through-wall new fans are also used.

The central fresh air system includes a main unit installed at the top of the room, and an air inlet duct and an air outlet duct. The indoor dirty air is discharged into the room through the air outlet duct, and the outdoor fresh air is purified into the indoor air through the air inlet duct and then sent into the room. Fans and filters are generally installed inside the fresh air main engine. The fan includes an induced draft fan and an exhaust fan to realize the two-way flow of the air flow. Some of them also include a total heat exchanger to exchange part of the indoor air and the outdoor air and adjust the air humidity.

Wall-mounted and cabinet-type new fans integrate the components such as fans and filters into a machine to form a mainframe. The mainframe is generally installed indoors. It is connected to the outside through the inlet and outlet pipes. The general pipes are short and hidden. Not visible inside the wall. The fan is divided into an induced draft fan and a blower. During operation, the induced draft fan is introduced into the indoor dirty air through the air outlet around the main casing, and the blower introduces outdoor fresh air through the intake pipe through the filter assembly (generally a multi-stage filter) and then sends it indoors. . In addition, the high-profile wall-mounted and cabinet-type new fans are generally equipped with a total heat exchanger to achieve partial temperature exchange between indoor air and outdoor air and to adjust the air humidity.

A through-wall type new fan, which is generally installed on a wall or glass. The new fan is placed inside the wall or glass by perforating the wall or glass (generally 15 cm or more in diameter), and the outdoor air is introduced through the internal fan. The filter assembly (filter) is sent into the room. This type of through-wall new fan is generally a one-way flow of airflow. Some products realize a certain degree of intermittent indoor and outdoor air exchange by controlling the forward and reverse of the fan.

The above-mentioned central fresh air system needs to install a large number of air inlet ducts and exhaust ducts, which destroys the home interior and greatly occupies the family space. For wall-mounted and cabinet-type new fans, although the ventilation ducts are saved to a certain extent, they occupy a large space, the machine is heavy, the power is large, the energy consumption is too high, and it is very uneconomical to use. Through-wall type new fans are generally filtered through the filter screen. The efficiency of primary filtration is low, and it is difficult to meet the requirements of fresh air. Because of the need to be installed in the wall cavity as a whole, the diameter of the wall hole is too high, and the utility is reduced, which seriously affects consumption. The choice of the person.

In addition, the above-mentioned central fresh air system, wall-mounted and cabinet-type new air blowers use filter screens as air dust-removing devices, and some of them also use electrostatic dust-removing devices as air dust-removing devices, but these electrostatic dust-removing devices are limited to the inherent formation of electrostatic fields. The mode uses a conventional parallel-spaced opposed plate to form an electrostatic field, which causes the volume of the new fan to be bulky, takes up too much space, and the air flow to be dusted passes straight through, often resulting in low air dust removal efficiency. The quality of fresh air is often inferior, affecting human health, which leads to low acceptance of new fans using these electrostatic precipitators. In addition, the new fans using electrostatic precipitator equipment also have some hidden hazards that affect human health and are difficult for people in the field to find for a long time, resulting in large safety hazards of these new fans.

What is more serious is that the above-mentioned new types of fans generally have the function of single function, and only have the function of air circulation. In the case of severe smog of the outside air, the work load of the filter components of the new fan is not only increased, making it easy. Damaged, and the quality of the air drawn from the outside and filtered is not even as good as the original air quality in the room. In view of this, there are some relatively rough new fans with internal circulation function in the prior art. For example, some new fans use two fans to form an inner circulation mode and an outer circulation mode relatively independently in order to form an inner circulation operation mode. This not only fails to overcome the existing defects of the existing new wind turbines, but also causes the new wind turbines to be larger in size, more complicated in structure, and more complicated in air duct laying. In addition, some wall-mounted and cabinet-type new fans directly open an indoor air inlet on the indoor body, and selectively block the indoor air inlet or the external air inlet of the external air inlet duct through the switch cover inside the body. Switching between the outer loop working mode and the inner loop working mode is realized. However, this structural form does not change the essence of the wall-mounted and cabinet-type new fan, and the inherent occupying space is large, bulky, and consumes too much energy. No change, more serious, the rough way of opening the indoor air inlet directly on the indoor body of the wall-mounted and cabinet-type new fans will lead to serious defects such as roaring, filter damage and air circulation. Specifically, since the air intake chamber of the indoor host of the wall-mounted and cabinet-type new fan is generally large, an indoor air inlet is directly opened on the indoor host, and the indoor air inlet is closer to the fan, and the indoor air sucked by the fan is Unlike external air intake, which can be buffered by an external air intake duct, it directly enters the air intake chamber of the indoor host at high speed, causing tremors and even roaring of the indoor unit. At the same time, due to the strong suction of indoor air via the fan, the high-speed impact without buffering The filter element causes the filter to be easily damaged and does not function well. Once the filter element is damaged, the filter element can not effectively limit the exit wind speed. The flow rates of the inlet and outlet air tend to be close. The inspection confirms that it is easy to form an infinite loop of indoor air in a local area around the indoor host. That is, the internal circulation mode of the wall-mounted and cabinet-type new fans at this time is basically unable to effectively purify the indoor air, and is in an ineffective state.

The above-mentioned shortcomings of new wind turbines have formed a technical bottleneck restricting the further development of new wind turbines. Some hazard factors have not been realized by technicians in the field so far, and there are serious hidden dangers, especially how to make new wind turbines have both internal and external circulation working modes. It effectively saves indoor space and works well and is a technical problem in the field.

Summary of the invention

It is an object of the present invention to provide a duct having a large increase in the flow passage in the duct and a cushioning of the wind speed, in particular, a longer purging time and a better purifying effect.

In order to achieve the above object, the present invention provides a duct, in which a baffle is disposed, through which a zigzag passage of increasing flow is formed in the duct, from the duct The inflowing airflow at the windward end flows along the tortuous passage and flows out from the outlet end.

Preferably, the inner peripheral wall of the air duct is respectively provided with a plurality of first flow guiding flanges and second flow guiding flanges which are axially spaced and located on both sides in the radial direction, as each of the baffles The first flow guiding flange and the second flow guiding flange are sequentially shifted in the axial position to form a baffle passage.

Preferably, the baffle is a spiral baffle, and the baffle extends in a spiral shape in the axial direction to form a spiral channel.

Preferably, the number of coils of the baffle in a spiral shape in the air passage is 2 to 5 turns.

Preferably, the air duct comprises a nested outer tube and an inner tube, the inner tube is a hollow tube closed at the windward end, and the spiral baffle abuts the outer peripheral wall of the inner tube and the The inner peripheral wall of the outer tube is formed in an annular lumen between the outer tube and the inner tube.

Preferably, the air duct further includes a guide sleeve, and the deflector is mounted on the outer peripheral wall of the guide sleeve in a spiral blade shape. The flow guiding sleeve is disposed on the inner tube.

Preferably, the ratio of the cross-sectional area of the annular lumen to the inner lumen of the inner tube is 2 to 4.

Preferably, an axially continuous electrostatic precipitator structure is disposed in the air duct, and the airflow flowing along the tortuous path flows out from the air outlet end of the air duct after being dusted by the electrostatic precipitator structure.

Preferably, the annular lumen is provided with a dust collecting tube and an electrode line extending axially within the dust collecting tube, and one of the electrode line and the dust collecting tube is positively charged, and the other With negative power.

Preferably, the air duct is provided with a plurality of the electrode lines spaced around the circumferential direction of the outer peripheral wall of the inner tube, and the plurality of the electrode lines are arranged in a concentric ring radially spaced from the dust collecting tube. shape.

Preferably, a plurality of the electrode wires are arranged at equal intervals along a circumference of the inner tube, and a plurality of the electrode wires enclose a cylindrical diameter not larger than 80% of an inner diameter of the dust collecting pipe, and The radial distance of the electrode line from the dust collecting tube is not less than 1 cm.

Preferably, a plurality of the electrode wires are arranged at equal intervals along a circumference of the inner tube, and a plurality of the electrode wires enclose a cylindrical diameter larger than an outer diameter of the inner tube, and not smaller than the set 40% of the inner diameter of the dust pipe.

Preferably, the number of the electrode wires is 3 to 6, and the diameter of the electrode wires ranges from 0.08 to 0.2 mm.

Preferably, the axial length of the electrode line straightened in the axial direction is smaller than the length of the dust collecting tube, and both ends of the electrode line are fixed and the fixed positions of both ends are not beyond the two ends of the dust collecting tube. .

Preferably, the electrostatic precipitator structure comprises a high voltage generator, one of the electrode line and the dust collecting tube is electrically connected to the positive pole of the high voltage generator, and the other is electrically connected to the negative pole of the high voltage generator.

Preferably, the inner tube is an insulating material tube, and the high voltage generator is disposed in the inner tube.

Preferably, the high voltage generator has a discharge voltage of 5 to 9 kV.

Preferably, the windward end of the annular lumen is provided with a communication valve for opening to communicate the inner tube lumen of the inner tube and is provided with a drafting valve for opening to communicate the spiral passage.

Preferably, the windward end of the inner tube is connected with an inner tube end disc, the central retaining disc portion of the inner tube end disc blocks the windward end end surface of the inner tube, and the outer ring portion of the inner tube end disc Covering the windward end face of the annular lumen and providing a first annular cavity port communicating with the annular lumen, the outer wall of the outer wall of the inner tube of the inner tube is provided with a first communicating with the annular lumen Connecting port

Moreover, a switching sleeve is further disposed in the air duct, the switching sleeve includes a sleeve portion and a sleeve end plate connected to the windward end of the sleeve portion, and the sleeve end plate is provided to be a central through hole through which the inner tube passes, the outer peripheral edge portion of the end face plate of the baffle is provided with a second annular cavity opening, and the outer peripheral wall of the sleeve portion is provided with a second communication opening;

The switching sleeve is fixedly sleeved on the windward end of the inner tube, and the end sleeve of the sleeve is closely attached to the end tube of the inner tube, and the inner tube can be rotated relative to the switching sleeve and successively placed a first rotation position and a second rotation position, wherein the first annular cavity port is in communication with the second annular cavity port and the first communication port and the second communication port are mutually connected Staggered and closed, in the second rotation position, the first communication port is in alignment communication with the second communication port, and the first ring cavity port and the second ring cavity port are mutually staggered and closed.

Preferably, the number of the outdoor vents and the indoor vents of the outer shaft end of the inner tube are the same and are equally spaced in the circumferential direction, and the outdoor vents and the indoor vents are arranged one-to-one in the circumferential position. The number of the outdoor air communication ports and the indoor air communication ports on the switching collar are the same and are equally spaced in the circumferential direction, and the distribution circle of the outdoor air communication port and the distribution circle of the indoor air communication port The rings are staggered in the circumferential position;

Or the number of the outdoor air communication ports and the indoor air communication ports of the outer shaft end of the switching guard sleeve are the same and circumferentially The outdoor air communication port and the indoor air communication port are arranged in a one-to-one correspondence at equal intervals; the outdoor vents and the indoor vents on the inner tube are the same number and are arranged at equal intervals in the circumferential direction. The distribution ring of the outdoor vent is offset from the distribution ring of the indoor vent in a circumferential position.

Preferably, the air duct is further provided with a rotary drive assembly connecting the inner shaft end of the inner tube to control the rotation of the inner tube, the rotary drive assembly including a drive control device, a gear transmission mechanism and a rotation for sequentially controlling the transmission a connecting member that connects the inner shaft end of the inner tube.

Furthermore, the present invention also provides an air treatment apparatus comprising the above described air duct according to the present invention.

According to the above technical solution, in the air duct of the present invention, since the meandering passage is formed by providing the deflector, the winding of the meandering passage greatly increases the flow, and the residence time of the gas to be purified flows through the tortuous passage is longer. It can react with the electrostatic precipitator structure set in it for a longer time, and the electrostatic dust removal effect is better. Moreover, when the wind flow rate of a large flow rate passes through the tortuous passage, buffering is obtained, the speed is reduced, and the impact is slowed down, especially in the wall-through pipe of the through-wall air treatment device, and the high-speed airflow is fixed to the wall-through pipe fixedly installed in the wall hole. The impact of the impact is small, the vibration is small, and the direct impact on the fan in the air treatment device and the resulting large noise and tremor of the whole machine are avoided.

Other features and advantages of the invention will be described in detail in the detailed description which follows.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a In the drawing:

1 is a cross-sectional structural view of an air treatment apparatus according to an embodiment of the present invention, in which partial hatching is omitted for clarity of display;

2 is a schematic view showing an air flow direction of an air-inducing operation mode and an inner-cycle working mode of the air treatment apparatus of the embodiment shown in FIG. 1;

Figure 3 is a perspective view of the air treatment apparatus of the embodiment shown in Figure 1;

Figure 4 is a left side view of Figure 3;

Figure 5 is a cross-sectional view taken along line A-A of Figure 4;

6 is a schematic view of a drive control device and a gear transmission mechanism of the air treatment apparatus of the embodiment shown in FIG. 1, and components such as a dust collecting pipe and an inner pipe are omitted for clarity of display;

Figure 7 is a schematic view of the rotary drive assembly of the inner tube of the embodiment shown in Figure 1, with the components such as the flow guide sleeve omitted for clarity;

Figure 8 is a perspective view showing the inner structure of the inner tube of the embodiment shown in Figure 1;

Figure 9 is a perspective view showing the structure of the switching cover of the embodiment shown in Figure 1;

Figure 10 is a schematic view showing the combined structure of the switching sleeve and the guide sleeve of the embodiment shown in Figure 1;

Figure 11 is a schematic view showing the spiral flow direction of the air flow in the passage in the purified air pipe;

Figure 12 is a schematic view showing the connection form of the electrode wire of the embodiment shown in Figure 1;

Figure 13 is a schematic view of the electrode connection structure as viewed from the end of the dust collecting tube;

Figure 14 is a perspective view showing the structure of the ozone filter module in the air dust removing device of the embodiment shown in Figure 1;

Figure 15 illustrates the application of the air dust removal device of the embodiment of Figure 1 in other conduits;

Figure 16 is a schematic view showing an arrangement structure of a passage in a purge air pipe according to another embodiment of the present invention;

Figure 17 is a schematic view of the air treatment apparatus of the present invention, the components of the drive control device and the high voltage generator inside the air treatment apparatus are omitted for clarity of the picture;

Figure 18 is a comparison diagram of the comparison effect of the primary purification rate of the air treatment apparatus of the present invention at different wind speeds;

Figure 19 is a line drawing of the purification effect and time of the air treatment apparatus of the present invention in a high wind speed and a low wind speed mode;

Fig. 20 is a line diagram showing the test effect of the ozone accumulation amount of the air treatment apparatus of the present invention.

detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative and not restrictive.

In the present invention, the term "circumferential" used generally means a direction surrounding the center line of the conveying pipe, and "axial direction" generally means a direction parallel to the center line, unless otherwise specified. The terms "first" and "second" are used for convenience of description only and are not intended to define structural differences, for example, the first end and the second end of the main pipe 1 may have identical structures.

First of all, the present invention provides a duct in which a flow path is formed by providing a baffle (such as the baffle 4 shown in FIGS. 1 and 10) to form a tortuous path of increasing flow from the windward end of the purified duct. The inflowing air flows along the tortuous path and flows out from the air outlet.

In a conventional air duct, when the airflow flows through it, it flows linearly along the central axis of the air duct, and the process is the shortest, that is, the flow is equal to the length of the central axis of the air duct. In comparison, since the meandering passage of the present invention has a large number of windings, the flow path of the airflow is much longer than the length of the central axis of the air passage, and therefore the residence time of the gas to be purified is longer when flowing through the tortuous passage. In this way, the electrostatic precipitator structure obtains a longer cleaning time, so that the electrostatic precipitating effect is better. For example, when the number of coils in the inner passage of the purifying air tube is 3 turns (generally 2 to 5 turns) in the spiral baffle plate 4 in Fig. 10, the length of the flow path is increased by about 4.5 times, and the flow extending effect is remarkable. Can greatly improve the purification efficiency.

At the same time, due to the existence of the baffle, when the airflow flows in the tortuous path, it will inevitably collide and friction with the baffle. The airflow loses kinetic energy and the wind speed decreases, which can avoid the impact of short-distance, high-flow airflow on the fan. Force, and the resulting tremor of the whole machine. Especially in the through-wall air treatment equipment, since the meandering passage is formed in the through-wall pipe, the through-wall pipe is stably embedded in the wall hole, and the impact of the airflow on the wall pipe is small, and the vibration of the whole machine is smaller. Therefore, the air handling equipment can be smoothly installed and operated, and the service life is longer.

The meandering passage has various forms. In a preferred embodiment, as shown in FIG. 16, the inner peripheral wall of the purifying duct may be respectively provided with a plurality of first diversions which are axially spaced and located on both sides in the radial direction. The flange 25 and the second flow guiding flange 26, each of the first flow guiding flange 25 and the second flow guiding flange 26 are sequentially shifted in the axial position to form a baffle passage. At this time, the airflow is bypassed in the purifying duct, and the deflector flange is continuously impacted to change direction. However, the vertical impact has a large impact on the flow guiding flange, especially for the flow guiding flange near one end of the air inlet.

In another preferred embodiment, as shown in Fig. 15, a baffle 4 in the form of a spiral vane is provided in the purifying duct, and the deflector 4 extends in a spiral shape in the axial direction to form a spiral passage. Since the baffle 4 is streamlined, the impact of the airflow on the baffle 4 is relatively small, the service life of the air duct is longer, the vibration is smaller, the airflow potential energy is also less lost, and the working efficiency of the fan is high.

The duct may be a single-tube duct, and the deflector in the form of a spiral vane is distributed on the inner wall surface of the duct. In addition, the air duct may also include a nested outer tube (such as the dust collecting tube 5 of FIG. 15) and an inner tube 1, respectively, and the spiral baffle 4 abuts the outer peripheral wall of the inner tube and the inner peripheral wall of the outer tube, respectively. A channel is formed in the annular lumen between the outer tube and the inner tube.

It is difficult to abut the upper and lower abutment of the deflector 4, and the processing precision is high, otherwise the gap is large, and the airflow flows through it to easily generate a spoiler.

For this reason, more preferably, the air duct may include a guide sleeve (such as the guide sleeve 3 of FIG. 10), and the deflector 4 is mounted on the outer peripheral wall of the guide sleeve 3 in a spiral blade shape, and the guide sleeve 3 is sleeved. On the inner tube 1. In this way, the baffle 4 can be easily installed, and only needs to be placed on the inner tube 1 through the diversion sleeve 3. The processing precision only needs to be embodied on the outer edge of the baffle 4, the processing difficulty is greatly reduced, and the assembly is more convenient.

Due to the presence of the inner tube 1, the annular lumen 6 between the outer tube and the inner tube 1 and the inner tube lumen of the hollow inner tube constitute an independent dual flow path, which is for an air handling device requiring a dual duct design, for example the following It is of special significance in combination with the application and development of the double-circulation in-wall type air handling equipment. For example, the inner shaft end of the inner tube 1 can introduce indoor air into the inner tube lumen, and the outer shaft end of the outer tube can introduce outdoor air to the annular lumen 6 between the inner and outer tubes. In the bleed mode of operation, outdoor air flows from the outer shaft end of the annular lumen 6 through the annular lumen 6 from its inner shaft end to the fan. In the inner circulation working mode, indoor air enters the inner tube lumen from the inner shaft end of the inner tube lumen, and then is folded from the outer shaft end of the inner tube lumen into the annular lumen 6, and finally flows through the annular lumen 6 Flow from its inner shaft end to the fan.

Thus, it is only necessary to provide a communication valve for opening to communicate the inner tube lumen of the inner tube 1 at the windward end of the annular lumen 6, and a pilot valve for opening to communicate the spiral passage. By switching the communication valve and the air intake valve in time, the switching between the air working mode and the inner working mode can be controlled. It is especially important that in the double-working mode air treatment device, due to the long flow path, the impact on the fan is small, and the structural components are collectively arranged in the wall-through tube, and the structure is compact and the space is small.

To this end, the present invention provides a communication valve and a bleeder valve of a preferred configuration, that is, a duct switching device in the form of an assembly, including an inner tube 1 and a switching damper 2, respectively, which are incorporated in FIGS. 8 and 9.

Specifically, the fluid inlet end of the inner tube 1 (the right end of the paper surface of FIG. 8 and also the outer shaft end) is connected with an inner tube end plate, and the center stopper portion 1b of the inner tube end plate blocks the fluid inlet of the inner tube 1, The outer ring portion of the tube end plate 1b covers the end face of the fluid inlet end of the annular lumen 6 and is provided with a first annular cavity opening 1c communicating with the annular lumen 6, and the outer peripheral wall of the tubular body 1a of the fluid inlet end of the inner tube 1 Providing a first communication port 1d connected to the annular lumen;

The shifting sleeve 2 includes a sleeve portion 2a and a retaining sleeve end plate 2b connected to the fluid inlet end of the sleeve portion. The retaining sleeve end plate 2b is provided with a central through hole adapted for the inner tube to pass therethrough, and the outer periphery of the retaining sleeve end plate 2b The edge portion is provided with a second annular cavity opening 2c, and the outer peripheral wall of the sleeve portion 2a is provided with a second communication opening 2d;

When assembling, the switching sleeve 2 is fixedly sleeved on the fluid inlet end of the inner tube 1, and the end sleeve 2b is in close contact with the inner tube end plate, and the inner tube 1 can be rotated relative to the switching sleeve 2 and successively in the first a rotation position and a second rotation position. In the first rotation position, the first ring cavity port 1c is in communication with the second ring cavity port 2c, and the first communication port 1d and the second communication port 2d are offset from each other and closed. In the two rotation positions, the first communication port 1d is in communication with the second communication port 2d, and the first ring cavity port 1c and the second ring cavity port 2c are offset from each other and closed.

It can be seen that the air duct switching device formed by the inner tube 1 and the switching baffle 2 can well realize the functions of the above-mentioned communication valve and the air inlet valve, and can be simply controlled by the double-circulation in-wall type air processing equipment. The relative rotation angle between the inner tube and the switching sleeve can control the switching between the induced air working mode and the inner circulating working mode. Obviously, the structure of the air duct switching device is simple, easy to assemble and operationally controlled.

Preferably, the ratio of the cross-sectional area of the annular lumen 6 to the lumen of the inner lumen is 2 to 4. In the case where the outdoor air is introduced into the annular lumen, the resistance is increased due to the provision of the baffle in the annular lumen, and the air resistance in the lumen of the inner lumen is small, so that the circulation of the airflow is guaranteed. In order to make the fan in the air treatment equipment at the optimal working point, that is, the intersection of the system resistance and the air volume, more airflow can be introduced into the annular cavity 6 to eliminate the influence of the resistance, and the resistance and the air volume are obtained. The balance is such that the ratio of the cross-sectional area of the annular lumen 6 to the lumen of the inner lumen is generally about 2 to 4.

The electrostatic precipitator structure provided by the present invention can be seen in FIGS. 12 to 14 and includes a dust collector capable of being charged, 5. a high voltage generator 16 and an electrode wire 21 extending along the axial direction of the inner tube 1 and passing through the respective diversion flows. One of the plate, the electrode wire 21 and the dust collecting pipe 5 is electrically connected to the positive electrode of the high voltage generator 16, and the other is electrically connected to the negative electrode of the high voltage generator 16.

In the electrostatic dust removing structure and the arrangement thereof, if the electrode wire 21 is electrically connected to the negative electrode of the high voltage generator 16, that is, the negative electrode is discharged (of course, the positive electrode can also be connected), the air dust particles in the annular cavity 6 are negatively carried by the electrode wire. The electric charge flows in the longer spiral passage, and the air dust particles are adsorbed to the dust collecting pipe 5, thereby obtaining an air purifying effect. Obviously, in the annular lumen 6, the electrode wire 21 is conveniently arranged, the space structure is compact, the air dust particles are easily charged and adsorbed, and the dust removal passage is long, and the dust removing effect is more prominent.

Preferably, the electrode wires 21 are plural and arranged at equal intervals along the circumferential direction of the inner tube 1, and the diameter of the cylindrical shape surrounded by the plurality of electrode wires 21 is not more than 80% of the inner diameter of the dust collecting pipe, and the electrode wires 21 The radial distance from the dust collecting pipe 5 is not less than 1 cm, so as to avoid bridging, high voltage breakdown, and the like due to high-voltage discharge at too close distance.

Hereinafter, as a preferred embodiment, the air duct of the present invention is applied to an air treatment device, in particular, a double-circulation in-wall type air treatment device and a system thereof, and specifically, the air duct is applied to a double-circulation in-wall type In the wall pipe of the air treatment device, the various functions and advantages of the air duct of the present invention will be more prominent and the effect will be more obvious. Of course, the air duct of the present invention is not limited to application to a double-circulation in-wall air handling apparatus and its system, and can be applied to various air ducts that require air purification or reduce impact on the main engine.

As described above, in order to realize the dual working mode, the whole machine has a compact structure, small occupied space, and stable and reliable working performance, the present invention provides a novel air processing device, especially a double-circulation in-wall air handling device. The air treatment apparatus includes a duct and an indoor unit exposed indoors, as shown in FIG. In particular, the present invention forms an inner passage of a clean air duct through which outdoor air passes and an indoor air duct in which indoor air circulates in the air duct, so that there is no scattered air inlet duct, exhaust duct, etc., and the whole structure is simple and compact, such as Figure 3 to Figure 5. At this time, the indoor unit is provided with a purifying air outlet, an indoor air inlet, and an air suction device 15. Wherein, the air duct may be a common air inlet duct of various air treatment apparatuses, but in the following description in conjunction with the drawings, the air duct is preferably a wall-through tube embedded in the wall hole.

Wherein, the air treatment device further comprises a air passage switching device and an air purification device, wherein the air passage switching device is configured to selectively and selectively conduct the indoor air pipe inner passage or the purified air pipe inner passage, so that the air processing device switches and operates in the inner circulation accordingly. Working mode or induced working mode; that is:

In the inner circulation working mode, the indoor air enters the indoor air pipe passage from the indoor air inlet under the action of the air suction device 15, and is purified by the air purifying device and discharged from the purified air outlet to the indoor;

In the air-inducing mode, the outdoor air enters the inner passage of the purified air pipe and passes through the air from the outer shaft end of the air duct (ie, the right end of the paper shown in FIG. 1 and FIG. 2, under the action of the air suction device 15). The purification device is purified and discharged from the purified air outlet to the room.

After the inner passage of the purified air tube and the inner passage of the indoor air tube are formed in the air duct, the flow path of the air flow is longer, and even under the strong suction of the air suction device 15, the air flow is also in the inner passage of the purified air tube or the indoor air tube in the air duct The channel is well buffered, and the impact on the whole machine is small. Even if the impact is generated, it is mainly reflected in the wall-mounted fixed installation duct, and the shock of the whole machine. Move small.

In addition, the air suction device 15 in the embodiment of FIG. 1 is preferably a single axial flow fan, and the purified air outlet of the air treatment device and the axial flow fan are axially aligned with the inner shaft end of the air duct, which is due to the inner passage of the purified air tube. And the indoor air pipe inner passage is integrated in the air duct, and the air flow outlet is at the inner shaft end of the air duct, so it is only necessary to arrange a single fan at the inner shaft end of the air duct instead of the double fan structure of the conventional double-cycle air processing equipment, in other words Fans can be shared, resulting in high structural integration. Further, as will be described later, since the inner passage of the purge air pipe and the inner passage of the indoor air pipe are compactly arranged in the duct, the air flow path is long, and the air purifying device is also compactly arranged.

In order to realize a clean air tube inner passage and an indoor air tube inner passage which are compact in structure, long in path, and capable of timely switching, it is easy for a person skilled in the art to adopt a form in which a double parallel tube or more tubes are built in the air duct. This is bound to require the diameter of the duct to be large enough to meet the demand for air volume. In order to achieve a compact structure and maximize the amount of air intake, the in-wall cavity air treatment apparatus of the present invention employs a casing structure including an inner tube 1 and an outer tube, and an annular lumen between the inner tube lumen and the inner and outer tubes. Either 6 is a channel for purifying the air tube, that is, outdoor air may enter the inner tube lumen or the annular lumen 6 from the outer shaft end of the duct and then flow out from the corresponding inner shaft end.

At this time, the other of the inner tube lumen and the annular lumen 6 constitutes an inner passage of the indoor air tube or at least forms part of the inner passage of the indoor air tube. In the double working mode, when the inner passage of the purified air pipe is connected to enter the outdoor air, the inner air pipe inner passage needs to be closed. Similarly, when the inner air pipe inner passage is connected, the inner passage of the purified air pipe needs to be closed. At this time, considering that the indoor air inlet in the inner circulation mode is disposed in the indoor body, a more reasonable air passage arrangement is that it can only enter from the inner shaft section of the air duct and then recirculate to the inner shaft end. Therefore, the indoor air tube inner passage may include an inner tube lumen and an annular lumen 6 of the inner tube 1, and the indoor air entering the indoor air inlet enters the air duct through the inner shaft end of one of the inner tube lumen and the annular lumen 6 Then, it can enter the cavity of the other from the outer shaft end, preferably from the inner shaft end of the other. In this way, not only is the process longer, but in the inner circulation or the convection mode, at least part of the passage in the duct is the common flow of indoor air and outdoor air, thereby facilitating the compact arrangement of the air purification device. , just arrange it in the shared flow channel.

On this basis, in order to realize the timely switching of the indoor air pipe inner passage and the clean air pipe inner passage, the air passage switching device should include two controllable switching valves, that is, a guide that can be opened at an appropriate time to introduce outdoor air. The damper and a communication valve that can be opened in time to communicate the inner tube lumen with the annular lumen 6 (thus forming a complete internal air tube passage). Wherein, the air inlet valve should be disposed at the outer shaft end end surface of the inner passage of the purified air pipe, and at this time, the inner shaft end of the inner passage of the purified air pipe communicates with the air suction device 15 to provide power to draw in air. At the same time, the inner tube lumen communicates with the inner shaft end of the other of the annular lumens 6 and the communication valve is disposed between the outer shaft end of the inner tube lumen and the outer shaft end of the annular lumen 6.

In the embodiment shown in Figure 1, the annular lumen 6 is selected to purge the inner passage of the air tube. In this case, the inner tube 1 is an inner circulation intake pipe that communicates with the indoor air inlet. Referring to Fig. 2, the outdoor air inlet A flows into the annular duct 6 from the outside to the inside, and the indoor air inlet B enters from the inner shaft end of the inner tube lumen, and the outer shaft end of the inner tube lumen enters the annular lumen 6 Finally, it flows out from the inner shaft end of the annular lumen 6.

Referring to Figures 8 and 9, the present invention also provides a preferred configuration of the air duct switching device, which can realize the common functions of the above-mentioned air inlet valve and the communication valve by simple rotation control. Specifically, the air passage switching device includes an outer shaft end portion of the inner tube 1 and a switching sleeve 2 engaged therewith.

First, the outer tube end of the inner tube 1 in Fig. 8 is connected with an inner tube end plate, the central stopper portion 1b of the inner tube end plate blocks the outer shaft end surface of the inner tube 1, and the outer ring portion of the inner tube end plate Covering the outer end end face of the annular lumen 6 and providing an outdoor communication with the annular lumen 6 The vent 1c is provided with an indoor vent 1d for communicating the annular lumen 6 on the outer peripheral wall of the outer shaft end of the inner tube 1.

Next, the switching collar 2 of FIG. 9 includes a sleeve portion 2a and a retaining sleeve end plate 2b connected to the outer end surface of the sleeve portion 2a, and the stopper end plate 2b is provided with a central through hole adapted for the inner tube 1 to pass through. The outer peripheral edge portion of the stopper end plate 2b is provided with an outdoor air communication port 2c, and the outer peripheral wall of the sleeve portion 2a is provided with an indoor air communication port 2d.

Finally, during assembly, the shifting sleeve 2 is fixedly sleeved on the outer shaft end of the inner tube 1, one of which is rotatable and the other relatively fixed. The shifting sleeve 2 is fitted from the inner shaft end of the inner tube 1, and the end sleeve end plate 2b is in close contact with the inner side of the inner tube end plate. Thus, the relative rotational cooperation of the end face disc 2b and the inner tube end plate constitutes the above-mentioned air inlet valve, and the relative rotation fit between the sleeve portion 2a of the shift sleeve 2 and the outer peripheral wall of the outer shaft end of the inner tube 1 is switched. The above-described communication valve is constructed. Specifically, in the embodiment of FIG. 1 , the inner tube 1 is rotated and the switching sleeve 2 is fixed. For example, the inner tube 1 rotates relative to the switching sleeve 2 and can be successively opened at the first rotation position and open communication of the air inlet valve. The second rotation position of the valve, in the first rotation position, the outdoor vent 1c is in alignment with the outdoor air communication port 2c, and the indoor vent 1d and the indoor air communication port 2d are mutually staggered and closed, and in the second rotation position, the indoor vent 1d is in alignment with the indoor air communication port 2d, and the outdoor vent 1c and the outdoor air communication port 2c are offset from each other and closed.

In order to achieve such a rotation switching, the simpler way is as shown in FIG. 8 and FIG. 9 , the outdoor vents 1 c and the indoor vents 1 d of the outer shaft end of the inner tube 1 are the same, and are arranged at equal intervals in the circumferential direction. The one-to-one correspondence is set in the circumferential position, and the outdoor air communication port 2c and the indoor air communication port 2d on the switching cover 2 are the same number, are arranged at equal intervals in the circumferential direction, but are offset at a reasonable angle in the circumferential position. That is, the distribution ring of the outdoor air communication port 2c and the distribution ring of the indoor air communication port 2d are staggered in the circumferential position to realize the above-described rotation switching function. Of course, it is also possible to align the communication ports on the switching hood 2, and the vents of the outer shaft ends of the inner tube 1 are staggered, and the same effect can be obtained. That is, the number of the outdoor air communication ports 2c and the indoor air communication ports 2d of the outer shaft end of the switching guard sleeve 2 are the same and are equally spaced in the circumferential direction, and the outdoor air communication port 2c and the indoor air communication port 2d are in the circumferential position one by one. Corresponding setting; the outdoor vent 1c and the indoor vent 1d on the inner tube 1 are the same and arranged at equal intervals in the circumferential direction, and the distribution ring of the outdoor vent 1c and the distribution ring of the indoor vent 1d are in the circumferential position. Staggered.

In order to realize the rotation switching control between the inner tube 1 and the switching sleeve 2, the air passage switching device further includes a rotation driving assembly that connects the inner shaft end of the inner tube 1 to control the rotation of the inner tube 1.

Referring to FIG. 6 and FIG. 7, as a preferred example, the rotary drive assembly includes a drive control device 12 for sequentially controlling the transmission, a gear transmission mechanism 11 and a rotary joint member 10, and the rotary joint member 10 is connected to the inner shaft end of the inner tube 1, with a view to The accuracy of the gear drive structure is used to accurately control the rotational opening of the inner tube 1. The drive control device 12 is preferably an electronic control device, such as a motor or the like. The gear transmission mechanism 11 may include a worm gear mechanism 11a, a drive gear 11b, and a driven gear that are sequentially transmitted. The driven gear may be a combined first slave. The gear 11c and the second driven gear 11d, the output shaft of the driven gear is connected to the rotary joint 10, and the rotary joint 10 includes a rotary joint sleeve 7, and a shaft end of the rotary joint sleeve 7 is connected to the output shaft of the gear transmission mechanism 11, The other shaft end is connected to the inner shaft end of the inner tube 1, preferably as shown in Fig. 7, by means of a snap connection 22 and a bayonet 22a of the inner shaft end of the inner tube 1 of Fig. 8 to form a detachable snap connection. Of course, here is merely an example, those skilled in the art can think of more electronic control modes and electronic control structures to obtain the same, similar or better rotation control effects, which will not be described in detail herein.

The indoor body includes a cover 17 connected to the air duct, and a mounting frame 13 is fixedly disposed in the outer cover 17, and the drive control device 12 and the gear transmission mechanism 11 are mounted on the mounting frame 13. The indoor air intake passage 8 is connected to the indoor air inlet through the indoor air inlet. The indoor air inlet passage 8 is independently isolated from the inner cavity of the indoor body and the annular duct 6. The rotary connecting sleeve 7 is built in the indoor air inlet passage 8. In order to realize the communication between the indoor air inlet passage 8 and the inner tube cavity, one or more intake pipe air inlets 9 are penetrated through the outer peripheral wall of the rotary connecting sleeve 7, see FIG.

Another important improvement of the present invention is the extended design of the air flow passage in the air duct to increase the cushioning effect and facilitate the dust removal design, increasing the dust removal time and enhancing the effect. As shown in FIG. 16, in an embodiment, the inner peripheral wall of the inner passage of the purification air pipe is respectively provided with a plurality of first flow guiding flanges 25 and a second flow guiding line which are axially spaced and located on both sides in the radial direction. The flange 26, each of the first flow guiding flange 25 and the second flow guiding flange 26 are sequentially displaced in the axial position to form a purge air baffle passage. Such a flow guiding flange is preferably a circular arc plate such that outdoor air entering from the outer shaft end of the inner passage of the purified air pipe flows downwardly from the inner shaft end of the inner passage of the purified air pipe along the purified air baffle passage. Thus, Figure 16 achieves an effective extension of the flow path in a baffled form.

In the embodiment shown in FIG. 1, the air treatment device is provided with a spiral vane-shaped baffle 4 shown in FIGS. 10 and 11 in the inner passage of the purified air pipe, and the baffle 4 is spirally axially Extending to form a purifying air spiral passage, the outdoor air entering from the outer shaft end of the inner passage of the purifying air duct flows out from the inner shaft end of the inner passage of the purifying air duct along the purifying air spiral passage. Since the wind resistance increases due to the provision of the baffle 4 in the annular lumen 6, and the air resistance in the lumen of the inner tube is small, on the basis of ensuring the circulation of the airflow, the axial flow fan is at the optimal working point, that is, the system The intersection of the resistance and the air volume, by expanding the cross-sectional area of the annular lumen 6 to introduce more airflow to eliminate the influence of the resistance, and to obtain the balance between the resistance and the air volume, the ratio of the cross-sectional area of the annular lumen 6 to the lumen of the inner tube is approximately 2 to 4 are preferably 3 in the preferred embodiment of Figs. 1 and 2 . In Fig. 10, the number of coils in the spiral baffle 4 in the passage in the purge air pipe is 3 turns, generally 2 to 5 turns. When coiled 3 times, the length of the flow channel is increased by about 4.5 times, and the extension effect is outstanding, which is favorable for air purification and improves purification efficiency.

Among them, the baffle 4 can be integrally processed, or can be processed in stages and assembled. In the embodiment of FIG. 10, the air treatment device includes a guide sleeve 3, and the deflector 4 is mounted on the outer peripheral wall of the guide sleeve 3 in a spiral blade shape, and the guide sleeve 3 is sleeved on the inner tube 1 and switched The cover 2 is connected. The guide sleeve 3 facilitates assembly of the fixed baffle 4, and facilitates the overall assembly of the air duct and the mounting arrangement of the switching sleeve 2, the subsequent electrode line 21, etc., which will be specifically discussed below.

Another compact design of the invention resides in the arrangement of the air purification device. There are various types of dust removal methods, and in the embodiment shown in Figs. 12 and 13, it is preferable to employ an electrostatic dust removal method from the viewpoints of compactness, installation space, dust removal effect, and the like. Wherein, the outer tube comprises a dust collecting tube 5 capable of being charged, and the air purifying device comprises an electrostatic precipitating structure arranged in the inner passage of the purifying air tube, the electrostatic precipitating structure comprises a high voltage generator 16, an electrode line 21 and a dust collecting tube 5, and the electrode line 21 Extending in the axial direction and passing through the respective baffles 4, one of the electrode wires 21 and the dust collecting pipe 5 is electrically connected to the positive electrode of the high voltage generator 16, and the other is electrically connected to the negative electrode of the high voltage generator 16. In this way, the air dust particles in the passage in the purification air pipe are charged by the electrode wire 21, and when flowing in the longer spiral passage of the purified air, the air dust particles are adsorbed to the dust collecting pipe 5 sooner or later, thereby obtaining air purification. effect. Obviously, in the electrostatic dust removing structure, the electrode wire 21 is conveniently arranged, the space structure is compact, the air dust particles are easily charged and adsorbed, and the dust removing passage is long, the dust removing effect is more prominent, and the positive and negative electrodes of the high voltage generator can be replaced, that is, the electrode wire. 21 can be connected to the positive electrode or the negative electrode, and the dust collecting pipe 5 can be connected to the negative electrode or the positive electrode correspondingly. When the electrode wire 21 is connected to the negative electrode, it is called a negative electrode discharge, and the breakdown voltage is high, and it is not easily broken. When it is connected to the positive electrode, it is called a positive electrode discharge, and ozone is generated to be less discharged than the negative electrode, and the breakdown voltage is low. The embodiments of the present invention in conjunction with the drawings all employ a negative discharge.

In order to form a uniform electric field of a circular ring, the electrode wires 21 are preferably plural and arranged at equal intervals along the circumferential direction of the draft jacket 3. In Fig. 13, preferably four are used, and generally have a density distribution of 3 to 6. When the inner passage of the purified air pipe is the annular pipe cavity 6, the diameter of the cylindrical shape surrounded by the plurality of electrode wires 21 should be larger than the outer diameter of the inner pipe 1, and the electrode wire 21 should be closer to and close to the collector pipe 5. The inner tube 1 is used to obtain a larger electric field. In the present invention, the diameter of the cylindrical shape surrounded by the plurality of electrode wires 21 is generally not more than 80% of the inner diameter of the dust collecting pipe 5, and the radial distance of the electrode wire 21 from the dust collecting pipe 5 is not less than 1 cm. . Since the diameter of the cylindrical portion surrounded by the plurality of electrode wires 21 is larger than the outer diameter of the inner tube 1 due to being in the passage in the purified air tube, it is generally not less than 40% of the inner diameter of the dust collecting tube 5. In the embodiment of Fig. 13, the diameter of the enclosed cylindrical shape is preferably 60% of the inner diameter of the dust collecting pipe 5, and the electric field is formed to be dust-removed. The effect is outstanding.

The material of the electrode wire 21 may be made of a metal material, and the diameter is generally between 0.008 and 0.5 mm. For example, a tungsten wire of 0.2 mm diameter may be preferably used, which is easy to discharge at a high voltage. The finer the electrode wire 21 is, the better the discharge effect is. However, the finer the lower the cost, the more difficult to process and the easier the tensile fracture, and thus the diameter thereof is preferably 0.08-0.2 mm. In the length, the electrode wire 21 is straightened in the axial direction and the axial length is not more than the length of the dust collecting pipe 5, and preferably, the axial length of the electrode wire 21 can be 5-15 mm shorter than the length of the dust collecting pipe 5, ensuring being The ionized dust particles can be adsorbed to the inside of the dust collecting tube 5. One end of the electrode wire 21 is fixedly connected to the insulated wire holder 2e, see FIGS. 9 and 12, and the other end can be electrically connected to the high voltage generator 16 through the wire contact 24. In Fig. 13, since there are four electrode wires 21, two sets are employed, each of which is connected with two electrode wire contacts 24 by one electrode piece. Similarly, the dust collecting pipe 5 can also be connected to one electrode terminal of the high voltage generator 16 through the dust collecting electrode point 23 of the inner shaft end.

In the material, the dust collecting pipe 5 is preferably a conductive metal pipe, such as an aluminum alloy pipe, which is easy to conduct, collect dust, and clean, and the deflector 3, the baffle 4, and the switching baffle 2 are all insulating materials to prevent short circuit. The high voltage generator 16 may be disposed in the indoor body, such as the mounting frame 13, and connected to the electrode wire 21 and the dust collecting pipe 5 through wires. Alternatively, when the inner tube 1 is an insulating material tube, as shown in FIG. 15, the high voltage generator 16 may be disposed in the inner tube 1. The higher the discharge voltage of the high voltage generator 16, the higher the purification efficiency, but it also generates more ozone. Therefore, it is preferably 5 to 9 kV, more preferably about 8 kV, and both the purification efficiency and the amount of ozone generated are acceptable at this time.

The above-mentioned sleeve structure with spiral passage and its electrostatic dust removal structure not only increase the flow, prolong the electrostatic dust removal time, obtain better dust removal effect, and the centrifugal force brought by the spiral flow can accelerate the adsorption of charged dust to the dust collection tube. The inner peripheral wall of 5. The sleeve structure with spiral passage and its electrostatic dust removal structure can be applied to the air duct of various air treatment equipment to achieve dust removal in a small space. As shown in Fig. 15, by replacing one of the pipes, the purpose of purifying the air inside the pipe is achieved, and the highest dust removal efficiency can reach more than 95%. This electrostatic dust removal structure can also be removed and cleaned independently.

Due to the high-pressure discharge dust removal, ozone is inevitably generated in the process. To further purify the air, the air purification apparatus of the present invention further includes an ozone filter module 14 disposed on the downstream side of the electrostatic precipitator structure. Therefore, the ozone filter module 14 is disposed in the indoor body of the room, and the axially outer side of the ozone filter module 14 is spaced apart from the inner shaft end of the air duct, and the air suction device 15 is disposed on the inner side in the axial direction. The suction force of the air suction device 15 causes the preliminary purge air after the dust removal in the annular lumen 6 to pass through the ozone filter module 14, and is discharged from the exhaust port to the room by the air suction device 15 after the ozone is removed.

In a preferred configuration, the ozone filter module 14 is a metal honeycomb structure formed with a honeycomb hole, preferably made of an aluminum material. The metal honeycomb structure has a compact structure, a small installation space, a large surface area, and a surface that catalyzes the decomposition of ozone. The coating reacts with the surface coating as it flows through the honeycomb pores, causing the ozone to be decomposed. Such an ozone filter module 14 may be in the form of a single-plate single-stage, but may be provided as a multi-stage ozone filter module 14 stacked between the inner axial end of the duct and the air suction device 15, as needed.

As shown in FIG. 14, the ozone filter module 14 may further include an electric control module 141 and an ozone sensor 142. The ozone sensor 142 is disposed on the air outlet side of the ozone filter module 14, and the electronic control module 141 is configured to compare the ozone detected by the ozone sensor 142. The upper threshold of the content signal and ozone content and a warning signal when the ozone is exceeded. In this way, according to the real-time monitoring of ozone, it is possible to feedback whether the user needs to replace the ozone filtering module 14 in time. In order to avoid the failure of the reminder, the electronic control module 141 can also be connected with a backup battery.

In order to facilitate the replacement of the ozone filter module 14, the outer cover 17 on the top of the indoor body is provided with a replacement valve 171 directly above the ozone filter module 14, as shown in FIG. 14, so that the ozone filter module 14 can be dismantled by opening the replacement valve. To load, just pull up.

In the other replacement mode, the air suction device 15 is an axial flow fan, and the axial flow fan and the ozone filter module 14 are respectively mounted on both sides of the mounting bracket of the axial flow fan, and the two can be installed by screws, for example. On the bracket, an independent fan module is formed. The mounting bracket is fixedly mounted in the indoor unit. The outer casing 17 of the indoor unit is provided with a purifying air outlet, and the purifying air outlet is detachably mounted with a grille cover 172, as shown in FIGS. 3, 4, and 14. The contours of the purge air outlet and grille cover 172 are sufficiently large that the air suction device 15 and the air purification device mounted within the outer cover 17 can be removed from the purge air outlet to facilitate replacement of the ozone filter module 14 or even the entire individual fan module.

Additionally, to protect the exposed outer shaft end of the wall tube, the outer shaft end of the mounting sleeve 18 is also fitted with a primary baffle 20 and/or a primary screen 19. The primary baffle 20 may be a sealing plate, which may be controlled to open at the right time, or may be a grid plate or the like. The primary baffle 20 blocks insects, rain, and the like. The primary filter 19 can filter large foreign objects, such as leaves and paper scraps, to ensure that there is no clogging inside the device and can work normally for a long time.

Based on the above air treatment equipment, the present invention further provides an air treatment system including a installation wall 27 provided with a wall cavity, and a duct embedded in a double-circulation in-wall air treatment device. Installed in a wall hole, as shown in Figure 17.

The outer tube includes a mounting sleeve 18 that is disposed outside the dust collecting tube 5, and the gap between the two is about 1-2 mm. The mounting sleeve 18 is first embedded in the wall hole in the mounting wall 27, and the sleeve 18 is installed. The outer end penetrates the wall hole, and the inner end is formed with a peripheral flange which fits the inner wall surface of the mounting wall. The indoor body includes a cover 17, and the outer cover 17 is fixedly connected with the peripheral flange of the mounting sleeve 18. This creates a plug-in installation of the air handling equipment.

Specifically, the outer shaft end of the mounting sleeve 18 is provided with an outer shaft end stop structure 28, such as an annular rib that is convex on the inner wall. During assembly, the dust collecting tube 5, the switching sleeve 2, the deflector 4, the guiding sleeve 3 and the inner tube 1 can be sequentially embedded in the mounting sleeve 18, and the outer ends abut against the outer shaft end limiting structure 28 , to achieve axial positioning of the outer end. The outer end of the guide sleeve 3 can be connected to the connecting pin seat 2f of the switching sleeve 2 shown in Fig. 9 by a connecting pin. In addition, the air treatment device further includes an inner end positioning sleeve 29, after the respective tubes are fitted, the inner end positioning sleeve 29 is embedded in the inner shaft end of the installation sleeve 18, and the embedded tube segments of the inner end positioning sleeve 29 respectively abut the dust collection The tube 5, the flow guide sleeve 3 and the inner tube 1 are positioned to achieve axial positioning of the inner ends of the tubes.

At the time of installation, for the installation to be stable and secure, the mounting sleeve 18 is preferably installed obliquely, that is, the inner shaft end of the mounting sleeve 18 is slightly higher than the outer shaft end, and the horizontal elevation angle of the inner shaft end relative to the outer shaft end is usually 3 to 5°. Moreover, the wall thickness of the mounting wall 27 is not less than 25 cm, and the hole diameter of the wall hole is not more than 15 cm, for example, about 10 cm, so that a certain weight of the whole machine can be realized by the air duct and the mounting wall 27 of a considerable thickness.

With the preferred embodiment shown in FIG. 1 and FIG. 5, the inner and outer sleeves are used, and the annular lumen 6 is used as a passage for purifying the air tube, and the air passage switching device shown in FIG. 8 and FIG. 9 is arranged, and the spiral guide of FIG. 10 is arranged. The flow board 4 and the electrostatic precipitator and ozone removal air purifying apparatus shown in Figs. 12 to 14 were subjected to the power-on test of the air treatment system of the present invention after being mounted to the mounting wall 27 as shown in Fig. 17 .

Figure 18 is a comparison diagram of the comparison effect of the primary purification rate of the air treatment system of the present invention at different wind speeds; Figure 19 is a line diagram of the purification effect and time of the air treatment system of the present invention in the high wind speed and low wind speed mode; 20 is a line diagram of the test effect of the ozone accumulation amount of the air treatment system of the present invention. As can be seen from Fig. 18, in the air-inducing mode, even if the outdoor air PM2.5 concentration is greater than 500 ppb, the primary treatment rate of the air treatment system of the present invention is at least 93%. As can be seen from Figure 19, the PM2.5 concentration can be significantly reduced from 500 ppb to 100 ppb or less in one hour, regardless of high wind speed or low wind speed, until zero. As can be seen in Fig. 20, after the long-term operation of the air treatment system of the present invention, the accumulated ozone content in the indoor environment is substantially lower than the national standard value.

In summary, the air treatment device and the air treatment system of the present invention achieve at least the following objectives through a series of optimized designs:

1) Small size: due to the modular design and the compact design in the above-mentioned duct, the overall and partial volume of the device They are relatively small and have little impact on the home interior, especially the renovated rooms.

2) Good mountability: Due to the compact design inside the wall pipe, the pipe diameter is small, so that only the hole of not more than 10cm is required to be installed on the wall.

3) High filtration efficiency: Due to the design of the spiral flow channel and the electrostatic precipitator inside the tube, the flow path is increased, the dust removal time is extended, and the centrifugal force enhances the dust capture. These unique designs can effectively promote the pollution of PM2.5 in the air. The collection rate of the material can reach more than 95%.

4), no consumables filtration: Because the device adopts the modular design of the whole machine and components, the disassembly and assembly is convenient, the filter assembly can be easily taken out and installed, for example, the ozone filtering module 14 can be repeatedly cleaned and used.

5), various ways of use: can achieve the introduction of external air, the working mode of the air and the two modes of operation of the internal circulation mode of indoor air purification.

6), low power, low power consumption: due to the use of low-energy electrostatic dust removal filter components and single fans, low power and low power consumption can be achieved.

7), easy to install and maintain: Because the device adopts the modular design of the whole machine and various components, the internal core components are independent of each other, and can be removed and replaced separately.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the embodiments described above, and various modifications may be made to the technical solutions of the present invention within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention. For example, the rotational driving assembly for driving the inner tube 1 and the switching sleeve 2 to rotate relative to each other is not limited to the gear transmission structure and mode, and can be simply modified, and the rotation control is performed by an alternative winding roller method, that is, the inner tube 1 is regarded as a roller. The outer peripheral wall of the inner shaft end is wound around the control line, and the control line is stretched in the radial direction, and the accurate rotation angle of the inner tube 1 can be controlled according to the accurately characterized tensile amount.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

In addition, any combination of various embodiments of the invention may be made as long as it does not deviate from the idea of the invention, and it should be regarded as the disclosure of the invention.

Claims

An air duct is provided with a baffle in the air passage, through which a zigzag passage with a growing flow is formed in the air passage, and an air flow flowing in from the windward end of the air duct along the meander The passage flows and flows out from the outlet.
The air duct according to claim 1, wherein the inner peripheral wall of the air duct is provided with a plurality of first flow guiding flanges (25) and second guides which are axially spaced apart and are located on both sides in the radial direction, respectively. The flow flange (26), as the first flow guiding flange (25) and the second flow guiding flange (26) of the baffle, are sequentially displaced in the axial position to form a baffle passage.
The air duct according to claim 1, wherein the baffle is a spiral baffle (4), and the baffle (4) extends in a spiral shape in the axial direction to form a spiral passage.
The air duct according to claim 3, wherein the number of coils of the deflector (4) which is spiral in the air passage is 2 to 5 turns.
The air duct according to claim 3, wherein said air duct comprises a nested outer tube and an inner tube (1), said inner tube (1) being a hollow tube closed at the windward end, said spiral The deflector (4) abuts the outer peripheral wall of the inner tube (1) and the inner peripheral wall of the outer tube, respectively, the spiral passage forms an annular lumen between the outer tube and the inner tube (1) (6) Medium.
The air duct according to claim 5, wherein the air duct further comprises a guide sleeve (3), and the deflector (4) is mounted in a spiral blade shape on a peripheral wall of the guide sleeve (3) Upper, the flow guiding sleeve (3) is sleeved on the inner tube (1).
The air duct according to claim 5, wherein a ratio of a cross-sectional area of the annular lumen (6) to the inner lumen of the inner tube (1) is 2 to 4.
The air duct according to any one of claims 5 to 7, wherein an axially continuous electrostatic precipitator structure is disposed in the air duct, and the airflow flowing along the meandering passage passes through the dust removing structure of the electrostatic precipitating structure. It flows out from the outlet end of the duct.
The air duct according to claim 8, wherein the annular duct (6) is provided with a dust collecting tube (5) and an electrode line (21) extending axially inside the dust collecting tube (5) One of the electrode wire (21) and the dust collecting pipe (5) is positively charged, and the other is negatively charged.
The air duct according to claim 9, wherein said air passage is provided with a plurality of said electrode wires (21) spaced apart in a circumferential direction around a peripheral wall of said inner tube (1), and said plurality of said electrodes The line (21) is arranged in a concentric ring shape radially spaced from the dust collecting tube (5).
The air duct according to claim 10, wherein a plurality of said electrode wires (21) are arranged at equal intervals in the circumferential direction of said inner tube (1), and a plurality of cylinders surrounded by said electrode wires (21) The diameter of the shape is not more than 80% of the inner diameter of the dust collecting pipe (5), and The radial distance of the electrode wire (21) from the dust collecting pipe (5) is not less than 1 cm.
The air duct according to claim 10, wherein a plurality of said electrode wires (21) are arranged at equal intervals in the circumferential direction of said inner tube (1), and a plurality of cylinders surrounded by said electrode wires (21) The diameter of the shape is larger than the outer diameter of the inner tube (1) and not less than 40% of the inner diameter of the dust collecting tube (5).
The air duct according to claim 10, wherein the number of the electrode wires (21) is 3 to 6, and the diameter of the electrode wires (21) ranges from 0.08 to 0.2 mm.
The air duct according to claim 10, wherein an axial length of said electrode wire (21) straightened in the axial direction is smaller than a length of said dust collecting pipe (5), and two of said electrode wires (21) The end is fixed and the fixed positions at both ends are not beyond the two ends of the dust collecting pipe (5).
The air duct according to claim 8, wherein said electrostatic precipitator structure comprises a high voltage generator (16), and one of said electrode wire (21) and said dust collecting pipe (5) is electrically connected to said high voltage The anode of the generator (16) is electrically connected to the cathode of the high voltage generator (16).
The air duct according to claim 8, wherein the inner tube (1) is an insulating material tube, and the high voltage generator (16) is disposed in the inner tube (1).
The air duct according to claim 15, wherein the high voltage generator (16) has a discharge voltage of 5 to 9 kV.
The air duct according to claim 5, wherein the windward end of the annular lumen (6) is provided with a communication valve for opening to communicate the inner tube lumen of the inner tube (1) and is provided for opening An air inlet valve that communicates with the spiral passage.
The air duct according to claim 18, wherein the windward end of the inner tube (1) is connected with an inner tube end disc, and the central retaining portion (1b) of the inner tube end disc blocks the inner tube ( 1) a windward end end face, the outer ring portion of the inner tube end plate covers the windward end end face of the annular pipe cavity (6) and is provided with a first ring cavity passage communicating with the annular pipe cavity (6) a mouth (1c), a first communication port (1d) communicating with the annular lumen (6) is disposed on an outer peripheral wall of the tube at the windward end of the inner tube (1);

Moreover, a switching sleeve (2) is further disposed in the air duct, and the switching sleeve (2) includes a sleeve portion (2a) and a sleeve end plate connected to the windward end of the sleeve portion (2a) ( 2b), the baffle end plate (2b) is provided with a central through hole adapted to pass through the inner tube (1), and the outer peripheral edge portion of the end face plate (2b) is provided with a second annular cavity a port (2c), the outer peripheral wall of the sleeve portion (2a) is provided with a second communication port (2d);

Wherein, the switching sleeve (2) is fixedly sleeved on the windward end of the inner tube (1), and the end sleeve (2b) of the sleeve is closely attached to the end tube of the inner tube, and the inner tube (1) Rotatable relative to the switching sleeve (2) and successively in a first rotational position and a second rotational position, in the first rotational position, the first annular cavity port (1c) and the second ring The cavity port (2c) is in communication communication and the first communication port (1d) and the second communication port (2d) are mutually staggered and closed, and in the second rotation position, the first communication port (1d) The second communication port (2d) is in communication with the second communication port (2d) and the first ring cavity port (1c) and the second ring cavity port (2c) are mutually offset and closed.
The air duct according to claim 19, wherein the number of the outdoor vent (1c) and the indoor vent (1d) of the outer shaft end of the inner tube (1) is the same and is equally spaced in the circumferential direction, The outdoor vent (1c) and the indoor vent (1d) are disposed in a one-to-one correspondence at a circumferential position; the outdoor air communication port (2c) and the indoor air communication port on the switching hood (2) ( 2d) the same number and arranged at equal intervals in the circumferential direction, the distribution ring of the outdoor air communication port (2c) and the distribution ring of the indoor air communication port (2d) are staggered in the circumferential position;

Alternatively, the outdoor air communication port (2c) and the indoor air communication port (2d) of the outer shaft end of the switching collar (2) are the same number and are equally spaced in the circumferential direction, and the outdoor air communication port ( 2c) and the indoor air communication port (2d) are arranged one-to-one in the circumferential position; the outdoor vent (1c) and the indoor vent (1d) on the inner pipe (1) are the same number and along the circumference Arranged at equal intervals, the distribution ring of the outdoor vent (1c) and the distribution ring of the indoor vent (1d) are staggered in the circumferential position.
The air duct according to claim 19, wherein said air passage is further provided with a rotary drive assembly that connects the inner shaft end of said inner tube (1) to control the rotation of said inner tube (1), said rotary drive The assembly includes a drive control device (12) that sequentially controls the transmission, a gear transmission mechanism (11), and a rotary joint (10) that connects the inner shaft ends of the inner tube (1).
An air treatment apparatus comprising the air duct according to any one of claims 1 to 21.