CN208177240U - A kind of plant type air cleaning unit - Google Patents

Abstract

The utility model relates to plant type air cleaning units, the device includes shell, closing door, plant rack, water tank and blower, catch basin is wherein equipped in shell, the top of catch basin is arranged in plant rack, plant rack includes at least one rack unit, rack unit includes about at least two spaced placing grooves, a green plant is at least placed in placing groove, the outside of plant stretching placing groove, reduce influence of the plant rack to plant growth, conducive to plant growth, air purification effect is improved；Water tank and blower are located at the lower section of catch basin, water pipe is guided to water in the flowerpot of the upper end of plant rack, and successively drips in the flowerpot of lower layer through permeable hole and water hole, successively oozes according to this, finally the water outlet through catch basin returns in water tank, realizes recycling for water；Closing door is hingedly fixed on shell, and the upside of frame is arranged in venthole, and air is made to must travel plant purification before venthole outflow.

Description

A kind of plant type air cleaning unit

Technical field

The utility model relates to technical field of air purification more particularly to a kind of plant type air cleaning units.

Background technique

It with the industrialized high speed development in China, is improved in people's living standard, but living environment is also by broken Bad, air pollution is serious, and the quality of air quality directly affects the health of people, to improve our indoor air matter Amount, many families have purchased air purifier.

Currently, in the market the purification method of air purifier mainly have chemical reaction method, physical adsorption techniques, ozone bear from Sub- technology, nano photo catalyzed oxidation and non-thermal plasma trap etc., but it is substantially all the setting inside needing to regularly replace, cause Its maintenance expense is expensive.

In recent years, also occur some air purifier for plants successively in the market, the principle for purifying air is essentially all Want imitate the Nature the ecosystem, using natural means purify air, but in practical application, there are also many problems not yet Solve or solve it is not good enough, for example, the placement problem of plant, existing Activities of Some Plants air purifier, in order to meet Air purification effect specifically, is placed using plant rack interval multilayer and is planted generally by the way of multi-tier arrangement plant Object, and in order to which solve upper and lower level plant pours water problems arrives down water from top to bottom and successively passes through every layer of plant, and plant is put The structure and function for setting frame is relatively simple, and only permeable and support plant function, plant can only generally place vertically, and main It to be grown in the space of plant rack, make plant growth vulnerable to the influence of upper layer plant rack, cause plant withered Necrosis, to influence air purification effect.

Utility model content

The purpose of the utility model is to provide a kind of plant type air cleaning units, can be avoided plant rack to plant The adverse effect of growth.

To achieve the goals above, the utility model provides a kind of plant type air cleaning unit, comprising:

Shell, the shell is interior to be equipped with catch basin, and the inside of the shell is divided into upper space under by the catch basin Portion space；

Plant rack is arranged in the upper space, and the plant rack includes at least one rack unit, Each rack unit includes about at least two spaced placing grooves, and the placing groove includes front side wall, rear side Wall, left side wall, right side wall and the downside wall being connect with the lower end of the front side wall, rear wall, left side wall, right side wall, the bottom Side wall is equipped with water hole, and the downside wall at least front part tilts down setting, and the upper end of the front side wall turns forward Setting, and the height of the front side wall is lower than the height of the rear wall, left side wall and right side wall；

Green plant, including the flowerpot with nutrient matrix and the plant being planted in the flowerpot, the bottom of the flowerpot Portion is equipped with permeable hole, and the flowerpot slant setting is in the placing groove, and the plant stretches out from the front side of the placing groove The outside of the placing groove；

Water tank is located at the lower space, and the water pipe for being equipped with water pump in the water tank, connecting with the water pump is described The bottom of catch basin and the position being located above the water tank are equipped with water outlet, and the water pipe passes through the water outlet, water is drawn Into the flowerpot of the top of the plant rack, and successively drip to through the permeable hole and water hole the flowerpot positioned at lower layer It is interior, it successively oozes according to this, the water outlet finally through the catch basin returns in the water tank；

Blower is located in the lower space, and the shell is equipped with air inlet, enters for external air, and institute It states blower the air that outside enters is blown at the water tank place；

Closing door is hingedly fixed on the shell, wherein the closing door includes frame and connects with described frame one end The closing door that the transparent panel connect, the frame and the transparent panel are formed has expansion chamber, when the closing door is closed, institute It states expansion chamber to be connected to the upper space, extends the growing space of plant, the upside of the frame is arranged in venthole.

Preferably, the sloping portion upper side of the downside wall is equipped with limiting slot, for limiting the flower being obliquely installed Basin is mobile.

Preferably, the high level of the sloping portion of the downside wall is arranged in the water hole, and water is dripped from the water hole After out, at least part water drips in the flowerpot or catch basin of lower layer along the downside of the sloping portion.

Preferably, the angle between the downside wall and the front side wall is obtuse angle.

Preferably, the upper end of the front side wall has the limit section being vertically arranged, and the limit section and the downside wall are total With the position for limiting the flowerpot.

Preferably, the sloping portion downside of the downside wall is equipped with baffle, and the downside of the baffle is inclination Face, and the inclined surface is tilted gradually downward by water hole to the front side wall direction；

The baffle is located at the top of lower layer's flowerpot, and the part water that the water hole oozes is arrived along the inclined surface water conservancy diversion In the flowerpot of lower layer.

Preferably, the frame is equipped with the filter screen for covering the venthole.

Preferably, there are also air flue baffle between the venthole and the filter screen, the air flue baffle covering is described out Stomata, and the interval setting between the venthole and the filter screen, form the airflow channel of bending.

Preferably, the water tank some forward side direction exceed the plant rack, the closing door close when, The framework underside blocks the part water tank completely.

Preferably, any of the above-described kind of plant type air cleaning unit, including multiple rack units, multiple racks Unit or so is disposed adjacent, the left side wall of each placing groove and the upper and lower part of right side wall be all provided with it is jagged, same layer The notch of multiple placing grooves forms the airflow channel of left and right directions.

The above-mentioned technical proposal of the utility model has the advantages that plant type air cleaning dress provided by the utility model It sets including shell, closing door, plant rack, water tank and blower, wherein catch basin, the setting of plant rack are equipped in shell In the top of catch basin, plant rack includes at least one rack unit, and each rack unit includes at least two A spaced placing groove up and down, at least places a green plant in each placing groove, plant stretches out the placing groove Outside reduces influence of the plant rack to plant growth, is conducive to the growth of plant, improves air purification effect.

Water tank and blower are located at the lower section of catch basin, and water is guided to the upper of plant rack by the water pipe that one end is connect with water pump It in the flowerpot at end, and successively drips in the flowerpot of lower layer through the permeable hole and water hole, successively oozes according to this, it is final to pass through The water outlet of the catch basin returns in the water tank, realizes recycling for water.

Closing door is hingedly fixed on the shell comprising frame and the transparent panel being connect with one end of the frame, The closing door that the frame and the transparent panel are formed has expansion chamber, when the closing door is closed, the expansion chamber It is connected to the upper space, extends the growing space of plant, and the upside of frame is arranged in venthole, makes air from outlet It must travel plant purification before the outflow of hole.

Detailed description of the invention

Fig. 1 is the plant type air cleaning unit structural schematic diagram in the utility model one embodiment；

Fig. 2 is the status diagram that the closing door after removing green plant in the utility model one embodiment is opened；

Fig. 3 is the schematic diagram of the section structure of closing door in the utility model one embodiment；

Fig. 4 is the portion the A enlarged diagram of Fig. 3；

Fig. 5 is the structural schematic diagram of plant rack in the utility model one embodiment；

Fig. 6 is the positive structure diagram of placing groove in the utility model one embodiment；

Fig. 7 is the B-B diagrammatic cross-section of Fig. 6；

Fig. 8 is the structural schematic diagram of another angle of placing groove in Fig. 6；

Fig. 9 is the positive structure diagram of placing groove in another embodiment of the utility model；

Figure 10 is the C-C diagrammatic cross-section of Fig. 9；

Figure 11 is the structural schematic diagram of another angle of placing groove in Fig. 9.

In figure: 1: shell；11: air inlet；12: side door；2: closing door；21: frame；211: venthole；22: transparent panel； 23: filter screen；24: air flue baffle；3: green plant；4: ventilation opening；5: plant rack；51: rack unit；511: placing Slot；5111: front side wall；5112: rear wall；5113: left side wall；5114: right side wall；5115: downside wall；5116: limiting slot； 5117: water hole；5118: notch；5119: fixation hole；5110: fixed column；52: baffle；6: limit section；7: catch basin；71: Apopore；8: water tank；9: plant growth lamp；10: universal wheel.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model Apply example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all Belong to the range of the utility model protection.

In the present invention, it should be noted that in term, " transverse direction ", "upper", "lower", "front", "rear", " left side ", The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

As depicted in figs. 1 and 2, plant type air cleaning unit provided by the embodiment of the utility model, including shell 1, envelope Close door 2, plant rack 5, water tank 8 and blower, wherein be equipped with catch basin 7 in shell 1, catch basin 7 is by the inner part of shell 1 For upper space and lower space.

Plant rack 5 is arranged in upper space, and as shown in Figure 2 and Figure 5, which includes at least one Rack unit 51, as shown in figure 8, each rack unit 51 includes about at least two spaced placing grooves 511, the placing groove 511 includes front side wall 5111, rear wall 5112, left side wall 5113, right side wall 5114 and downside wall 5115, Wherein, downside wall 5115 connect shape with the lower end of the front side wall 5111, rear wall 5112, left side wall 5113, right side wall 5114 At a trough body structure, wherein the downside wall 5115 is equipped with water hole 5117, the downside wall 5115 at least front part Tilt down setting, the upper end of the front side wall 5111 turns forward setting, and the height of the front side wall 5111 is lower than described The height of rear wall 5112, left side wall 5113 and right side wall 5114.

Certainly, in some other embodiment, downside wall 5115 can also integrally tilt down setting, and hydropexis is avoided to exist The edge of downside wall.

As shown in Figure 1, at least placing a green plant 3 in each placing groove 511, the green plant 3 includes having The flowerpot of nutrient matrix and the plant being planted in the flowerpot, the bottom of the flowerpot are equipped with permeable hole, the flowerpot inclination It is placed in the placing groove 511, the plant stretches out the outside of the placing groove 511, and it is raw to plant to reduce plant rack 5 Long influence is conducive to the growth of plant, and plant can be formed afterwards in the outside of plant growing frame to a certain degree in growth One plant walls, since the main part of plant is grown in the outside of placing groove 511, the space in placing groove 511 is more advantageous In the flowing of air, make no matter air is being to flow in plant rack 5, or flow to air through plant walls out of plant placement Outside purification device, it can all pass through the purification of plant, improve air purification effect.

As shown in Fig. 2, the water tank 8 is located at the lower space, water pump (not shown) is equipped in the water tank 8 And the water pipe (not shown) being connect with the water pump, the catch basin 7 bottom and be located at the water tank 8 above Position is equipped with water outlet, and the water pipe passes through the water outlet, water is guided to the flowerpot of the top of the plant rack 5 It is interior, and successively dripped in the flowerpot of lower layer through the permeable hole and water hole 5117, it successively oozes according to this, described in final warp The water outlet of catch basin 7 returns in the water tank 8, realizes recycling for water, also closer to the natural ecological environment of plant.

Preferably, there are also water level sensors in water tank 8, and when water level is lower, water air pump inoperative carries out purification device only Air cleaning work.

In a preferred embodiment, after the water outlet of water pipe is passed through from water outlet, draw always from the rear side of plant rack 5 Onto the placing groove 511 of top side, guide to the water in water tank 8 in the green plant 3 of top side.In some embodiments, if It is equipped with multiple rack units 51, it is preferable that the water outlet setting distributive pipe or similar structures of water pipe make each rack unit The potting of 51 dealers can be poured quickly.

In some preferred embodiments, as shown in Figure 1, Figure 2 and shown in Fig. 5, multiple rack units 51 are provided with, and more A rack unit 51 or so is disposed adjacent, the top of the left side wall 5113 of each placing groove 511 and right side wall 5114 and Lower part is all provided with jagged 5118, and the notch 5118 of multiple placing grooves 511 of same layer forms the airflow channel of left and right directions, makes Air can flow in all rack units 51, and air left and right both direction flowing upper and lower simultaneously not only increases filtering Time, and have passed through more filtering bodies, improve filter effect.

Preferentially, catch basin 7 is the trough body structure that cross section is arc, connects the left side of shell 1 in the longitudinal direction Wall 5113 and right side wall 5114 can be good at collecting the water oozed from plant rack 5.

Blower is located at the side or following of water tank 8, and position corresponding with fan induced draught mouth is equipped with air inlet on shell 1 11, make in outside air suction casing 1, then where being blown into water tank 8 through blower, a part of impurity can be completed in conjunction with water Preliminary purification, or enter plant rack 5 through water outlet, and flow in plant rack 5, realization purifies again.

As shown in Fig. 2, in some preferred embodiments, in order to realize that better waterproof, the lower space of shell 1 are divided into Two cavitys, one of cavity is for placing water tank 8, and the height of the water tank 8 is lower than the height of the cavity, and assembling is in phase In another closed cavity (blower is not shown in the figure).The shell 1 is equipped with air inlet 11, the air inlet 11 and setting There is the cavity of blower to be connected to, the cavity for being provided with blower is equipped with blower described in ventilation opening 4 and passes through ventilation opening 4 and the water tank 8 Air communication at place.

As shown in Fig. 2, closing door 2 is hingedly fixed on the shell 1, wherein the closing door 2 include frame 21 and with The transparent panel 22 of 21 one end of frame connection, the frame 21 have extended cavity with the closing door 2 that the transparent panel 22 is formed Room, when the closing door 2 is closed, the expansion chamber is connected to the upper space, extends the growing space of plant, and The upside of frame 21 is arranged in venthole 211, and air is made to must travel plant purification before the outflow of venthole 211.

The plant type air cleaning unit of the embodiment, after admitting air into shell 1, across each placing groove 511 Water hole 5117 realizes that air flows in plant rack 5, and in the process, a part of impurity is in conjunction with water in air, one Part be trapped on plant or be absorbed by plants, i.e., through imitation setting natural ecosystems self-purification decompose after It is discharged again by venthole 211.

In some preferred embodiments, as shown in Fig. 2, Fig. 5, Fig. 7 and Fig. 8, on the sloping portion of downside wall 5115 Side is equipped with limiting slot 5116, mobile for limiting the flowerpot being obliquely installed.The shape of the limiting slot 5116 and flowerpot Shape matches, and inclined flowerpot is made to have part to be located in limiting slot 5116, avoids flowerpot mobile.

Further, in other preferred embodiment, as shown in figure 8, the water hole 5117 is arranged at the bottom The high level of the sloping portion of side wall 5115, water from the water hole 5117 drip in go out after, at least part water is along the inclination Partial downside drips to the flowerpot positioned at lower layer, drips to the part water directly in the flowerpot of lower layer above flowerpot, simulation Rainwater is irrigated.After oozing positioned at the apopore 71 of the placing groove 511 of lower side, it is pooled in catch basin 7, is returned through apopore 71 In water tank 8, the recycling of water resource is realized.And since water hole 5117 is located at a high position for the sloping portion of downside wall 5115 Place, can store a part of water in limiting slot 5116, avoids frequently watering, even the crowd often to go on business is without load The maintenance problem of heart plant.

In some preferred embodiments, the angle α between the downside wall 5115 and the front side wall 5111 is obtuse angle, is made The placing groove 511 can match further types of flowerpot.In order to keep the soaking effect of flowerpot more preferable, it is preferable that angle α is 110 ° -150 °, such as 120 °, 130 °, 140 °.

It is perpendicular in the upper end of the front side wall 5111 as shown in Fig. 2, Fig. 5, Fig. 7 and Fig. 8 in some preferred embodiments Straight setting limit section 6, the limit section 6 and the downside wall 5115 limit the position of the flowerpot jointly, i.e. formation one is similar The structure of clamping preferably fixes the position of flowerpot.

In order to avoid along 5115 sloping portion flowing water of downside wall by water conservancy diversion to the outside of lower layer's flowerpot, it is some preferably Embodiment in, as Figure 9-Figure 11, the downside wall 5115 sloping portion downside be arranged baffle 52, it is described to lead The downside for flowing block 52 is inclined surface, and the inclined surface is inclined gradually downward by water hole 5117 to 5111 direction of front side wall Tiltedly, referring to Figure 10 and Figure 11.Baffle 52 is located at the top of lower layer's flowerpot, and the part water that the water hole 5117 oozes is described in Inclined surface is by the flowerpot of water conservancy diversion to lower layer, it is preferable that the baffle 52 be not easy it is excessive, should be less than inclination flowerpot opening, make No matter water on inclined surface drips in any position of inclined surface, can drop into the flowerpot of lower layer, put positioned at undermost Slot 511 is set, baffle 52 will be in water water conservancy diversion to catch basin 7.

In order to make the water energy oozed in water hole 5117 there is part to flow along the inclined surface of baffle 51, it is preferable that as schemed Shown in 11, some of water hole 5117 passes through baffle 52.

In order to improve the clean-up effect of air, in some preferred embodiments, as shown in figs 2-4, in the frame 21 Upper setting covers the filter screen 23 of the venthole 211, before so that air is flowed out purification device, it is necessary to by the mistake of filter screen 23 Filter.

Further, as shown in Figure 3 and Figure 4, there are also air flue baffles between the venthole 211 and the filter screen 23 24, the air flue baffle 24 covers the venthole 211, and is spaced between the venthole 211 and the filter screen 23 Setting, prevent air from directly from venthole 211 flow out, but by air flue baffle 24 change direction after, then from venthole 211 flow Out, that is, the airflow channel for forming bending is further reduced impurity and flows out with air.It is highly preferred that in the end of air flue baffle 24 Vertical filter screen is set between the upper side of frame 21, makes air after 24 deflecting of air flue baffle flowing, through vertical filter screen Secondary filter.

In some preferred embodiments, in order to facilitate the installation of rack unit 51, it is preferable that as Figure 6-Figure 8, The four corners of 511 top of placing groove are respectively equipped with a fixation hole 5119, the four corners difference at the placing groove 511 time Make two placing grooves 511 for cooperating with the fixation hole 5119 for the placing groove 511 for being located at lower layer equipped with a fixed column 5110 Connection.

In other preferred embodiment, in order to add water convenient, as shown in Fig. 2, the water tank 8 is located at the part of front side Side direction exceeds the plant rack 5 forward, i.e., from the side, shell 1 is L-shaped, so set, after opening closing door 2 Water can be added into water tank 8, when the closing door 2 is closed, the part water tank 8, i.e. frame is blocked in 21 downside of frame completely The part of the thickness of frame 21 and water tank 8 beyond plant rack 5 it is of same size, closing door 2 solves at least herein prevents sky Gas is without plant purification due directly to the problem of flowing out.

It is further preferred that as shown in Fig. 2, being provided with side in the side of shell 1 position corresponding with water tank 8, blower Door 12, the side door 12 are arranged lockset, can be used as maintenance door, when needing to clear up or replacing water tank 8, and cleaning or maintenance wind When machine, this side door can be opened, facilitates operation.

Since the plant of plant type air cleaning unit provided by the utility model is mainly grown in the outer of plant rack 5 Position between side, that is, the transparent panel 22 and plant rack 5 of closing door 2, therefore, in some preferred embodiments, As shown in Fig. 2, setting promotes plant to carry out photosynthetic plant growth lamp 9 on frame 21, it may be preferable that plant growth lamp 9 The inside surrounding of frame 21 is set in the form of LED light bar.

As shown in Fig. 2, in some embodiments, mobile air cleaning unit, is arranged in the bottom of shell 1 and arrives for convenience Universal wheel 10, it is highly preferred that an at least universal wheel 10 is equipped with brake structure.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: Not each embodiment only contains an independent technical solution, in the case where scheduling conflicts are not present, institute in each embodiment The every technical characteristic mentioned can be combined in any way, formed it will be appreciated by those skilled in the art that other implementation Mode.

In addition, without departing from the scope of the invention, to technical solution documented by foregoing embodiments It modifies or equivalent replacement of some of the technical features, this reality that it does not separate the essence of the corresponding technical solution With the spirit and scope of novel each embodiment technical solution.

Claims (10)

1. a kind of plant type air cleaning unit characterized by comprising

Shell, the shell is interior to be equipped with catch basin, and the inside of the shell is divided into upper space with the catch basin and lower part is empty Between；

Plant rack is arranged in the upper space, and the plant rack includes at least one rack unit, each The rack unit includes about at least two spaced placing grooves, and the placing groove includes front side wall, rear wall, a left side Side wall, right side wall and the downside wall being connect with the lower end of the front side wall, rear wall, left side wall, right side wall, on the downside wall Equipped with water hole, the downside wall at least front part tilts down setting, and the upper end of the front side wall turns forward setting, and Height of the height of the front side wall lower than the rear wall, left side wall and right side wall；

Green plant, including the flowerpot with nutrient matrix and the plant being planted in the flowerpot, the bottom of the flowerpot is set There is permeable hole, the flowerpot slant setting is in the placing groove, and the plant is from described in the stretching of the front side of the placing groove The outside of placing groove；

Water tank is located at the lower space, and the water pipe for being equipped with water pump in the water tank, connecting with the water pump is described to catchment The bottom of slot and the position being located above the water tank are equipped with water outlet, and the water pipe passes through the water outlet, water is guided to institute In the flowerpot for stating the top of plant rack, and successively dripped in the flowerpot of lower layer through the permeable hole and water hole, It successively oozes according to this, the water outlet finally through the catch basin returns in the water tank；

Blower is located in the lower space, and the shell is equipped with air inlet, enters for external air, and the wind The air that outside enters is blown at the water tank place by machine；

Closing door is hingedly fixed on the shell, wherein the closing door includes frame and connect with described frame one end The closing door that transparent panel, the frame and the transparent panel are formed has expansion chamber, when the closing door is closed, the expansion Exhibition chamber is connected to the upper space, extends the growing space of plant, the upside of the frame is arranged in venthole.

2. plant type air cleaning unit according to claim 1, it is characterised in that: on the sloping portion of the downside wall Side is equipped with limiting slot, mobile for limiting the flowerpot being obliquely installed.

3. plant type air cleaning unit according to claim 2, it is characterised in that: the water hole is arranged at the bottom The high level of the sloping portion of side wall, after water is oozed from the water hole, at least part water is along the downside of the sloping portion Face drips in the flowerpot or catch basin of lower layer.

4. plant type air cleaning unit according to claim 1-3, it is characterised in that: the downside wall and institute Stating the angle between front side wall is obtuse angle.

5. plant type air cleaning unit according to claim 1-3, it is characterised in that: the front side wall it is upper Holding has the limit section being vertically arranged, and the limit section and the downside wall limit the position of the flowerpot jointly.

6. plant type air cleaning unit according to claim 1-3, it is characterised in that: the downside wall inclines Inclined portion divides downside to be equipped with baffle, and the downside of the baffle is inclined surface, and the inclined surface by water hole to described Front side wall direction tilts gradually downward；

The baffle is located at the top of lower layer's flowerpot, and the part water that the water hole oozes is along the inclined surface water conservancy diversion to lower layer Flowerpot in.

7. plant type air cleaning unit according to claim 1, it is characterised in that: the frame is equipped with described in covering The filter screen of venthole.

8. plant type air cleaning unit according to claim 7, it is characterised in that: the venthole and the filter screen Between there are also air flue baffle, the air flue baffle covers the venthole, and between the venthole and the filter screen Interval setting, forms the airflow channel of bending.

9. plant type air cleaning unit according to claim 1, it is characterised in that: the water tank some to front side Direction exceeds the plant rack, and when the closing door is closed, the framework underside blocks the part water tank completely.

10. plant type air cleaning unit according to claim 1, it is characterised in that: more including multiple rack units A described rack unit or so is disposed adjacent, and the left side wall of each placing groove and the upper and lower part of right side wall are equipped with Notch, the notch of multiple placing grooves of same layer form the airflow channel of left and right directions.