CN212274193U

CN212274193U - Fresh air exhaust system

Info

Publication number: CN212274193U
Application number: CN202020581836.6U
Authority: CN
Inventors: 耿洪兵; 田登辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-18
Filing date: 2020-04-18
Publication date: 2021-01-01
Anticipated expiration: 2030-04-18

Abstract

The utility model discloses a new trend exhaust system, including the pipeline, install the check valve in the pipeline, the indoor end rigid coupling of pipeline has the cavity with higher speed, the lateral wall middle part of cavity is equipped with the air inlet with higher speed, inside wall mid-mounting in the cavity has centrifugal fan with higher speed, the inner chamber wall extension orbit of cavity is 6 fonts with higher speed, the spiral radiation face that the inner chamber longitudinal section of cavity is "snail shell" form with higher speed, the fan rotates the orbit periphery and forms the exhaust passage of the horn mouth form that 6 fonts extended the setting between the inner chamber wall of cavity with higher speed, install power source and switch on the cavity with higher speed. The advantages and effects are as follows: have one-way circulation function, the air can only be outdoor from indoor outflow, has the function that prevents that the mosquito from getting into indoorly, can discharge the indoor air of suction behind accelerating with centrifugal spiral acceleration mode, still has the effect of attracting indoor mosquito and discharging to outdoors with higher speed, and simple to use is good moreover.

Description

Fresh air exhaust system

Technical Field

The utility model relates to a new trend exhaust system.

Background

The fresh air system is a set of independent air processing system consisting of an air supply system and an air exhaust system and is divided into a pipeline type fresh air system and a pipeline-free fresh air system. The pipeline type fresh air system consists of a fresh air fan and pipeline accessories, outdoor air is purified by the fresh air fan and is led into a room, and indoor air is discharged through a pipeline; the ductless fresh air system is composed of a fresh air fan, and the fresh air fan is used for purifying outdoor air and guiding the outdoor air into a room. Relatively speaking, the pipeline type fresh air system is more suitable for being used in industrial or large-area office areas due to large engineering quantity, and the pipeline-free fresh air system is more suitable for being used in families due to convenient installation.

The traditional exhaust system or exhaust system is simple in structure and generally comprises a pipeline, the inner end of the pipeline is communicated with the indoor environment, the outer end of the pipeline is communicated with the outdoor environment, and the air is automatically exhausted outwards through indoor positive pressure. The exhaust system or exhaust system with complicated structure is that an axial-flow exhaust fan is installed in the pipeline, and the automatic and active exhaust is realized by switching on the power supply of the exhaust fan. No matter the above exhaust system or exhaust system, its advantage effect is that the pipeline communicates indoor outer according to "word formula passageway" exhaust, and the stroke is short, and axial-flow type air discharge fan exhaust area is big, and the efficiency of taking a breath improves greatly, and the shortcoming is that structural design is unreasonable to lead to appearing a great deal of drawbacks. One of the disadvantages is that a one-way circulation structure and function are lacked, when external wind force is large, outdoor unpurified air can flow back into a room to cause secondary pollution, and mosquitoes can enter the room through a pipeline or nest in the pipeline; the other disadvantage is that the axial flow type exhaust fan which is coaxially arranged with the pipeline has large exhaust area but small exhaust force, and can still flow back to the indoor once encountering reverse wind; the third disadvantage is that the contact area of the axial-flow type exhaust fan is large when the fan blade pushes air, and is basically consistent with the cross section area of the pipeline, so that the noise is large when the axial-flow type exhaust fan works, and the indoor environment is influenced; the fourth disadvantage is that the function is single, only indoor air can be discharged, namely, the ventilation function is only available, and the mosquito and fly air-exhausting device has no effect on indoor mosquitoes and flies, particularly mosquitoes and flies which enter the room occasionally.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to provide a rational in infrastructure to the aforesaid, have one-way circulation function, the air can only be followed indoor outflow outdoor, has and prevents that the mosquito from getting into indoor function, can be with radial mode suction room air, area coverage is bigger, can discharge the room air of suction with the centrifugal spiral acceleration mode back with higher speed, still has the indoor mosquito attraction and arranges outdoor effect with higher speed, and is simple to use, the new trend exhaust system that the commonality is good moreover.

For solving above-mentioned technical problem, this new trend exhaust system is including the indoor outer pipeline of horizontal intercommunication, and its structural feature is: the inner wall of the pipeline is provided with a check valve which only enables air to flow from indoor to outdoor, the indoor end of the pipeline is fixedly connected with an accelerating cavity body communicated with the pipeline, the accelerating cavity body comprises an inner side wall tightly attached to the indoor wall or a window, the outer side wall opposite to the inner side wall at intervals is also included, the corresponding edge parts of the inner side wall and the outer side wall are provided with a closed annular side wall, the middle part of the outer side wall is provided with an air inlet deviated from the center of the outer side wall, the middle part of the inner side wall in the accelerating cavity body is provided with a centrifugal fan deviated from the center of the inner side wall, the fan of the centrifugal fan is arranged corresponding to the air inlet, the extending track of the inner cavity wall of the accelerating cavity body is 6-shaped, the longitudinal section of the inner cavity of the accelerating cavity body is a spiral radiation surface in a 'snail shell' shape, a bell-mouth, the accelerating cavity is provided with a power interface and a switch which are electrically connected with the centrifugal fan.

This patent application realizes having one-way circulation function through Z shape helical coiled passage structure, and the air can only be outdoor from indoor outflow, has and prevents that the mosquito from getting into indoor function, can be with radial mode suction room air, and the coverage area is bigger, can discharge the room air of suction with the acceleration of centrifugal spiral mode back with higher speed, still has and attracts indoor mosquito and with higher speed discharge outdoor effect, and is simple to use moreover, and the commonality is good.

The Z-shaped spiral channel structure means that the main structure of the patent application comprises a spiral air circulation channel similar to the Z shape. The Z-shaped spiral channel mainly comprises a pipeline, an accelerating cavity and an air inlet, wherein the forming modes mainly comprise two modes, namely a mode that the air inlet is arranged at a lower air outlet (pipeline) and at an upper position, in the mode, the air inlet represents the horizontal stroke at the bottom of a Z-shaped character in the Z-shaped spiral channel structure, the accelerating cavity represents the folding stroke at the middle part of the Z-shaped character in the Z-shaped spiral channel structure, and the pipeline represents the horizontal stroke at the top of the Z-shaped character in the Z-shaped spiral channel structure. For convenience of description, this approach is referred to as a "positive zigzag" structure or approach. The other mode is that the air inlet is arranged at the upper air outlet (pipeline) and the lower air outlet (pipeline), in the mode, the air inlet represents the horizontal stroke at the top of the Z-shaped spiral channel structure, the acceleration cavity represents the folding stroke at the middle of the Z-shaped spiral channel structure, and the pipeline represents the horizontal stroke at the bottom of the Z-shaped spiral channel structure. For convenience of description, this approach is referred to as an "inverted Z" configuration or approach. In this patent application, the acceleration chamber is a structure similar to a short column placed transversely, the vertical dimension of which is much greater than the axial dimension. Because the air inlet of the inverted Z-shaped structure or mode is arranged below the upper air outlet, even if outdoor mosquitoes climb into or fly into the cavity at the lower part of the acceleration cavity through the pipeline, the outdoor mosquitoes can only be limited to move in the cavity at the lower part of the acceleration cavity and are difficult to climb along the smooth inner wall. After the power supply is switched on, the mosquitoes trapped in the accelerating cavity can be discharged outdoors, and the effect of preventing the mosquitoes from entering the room is achieved. Therefore, the structure or the mode of the inverted Z-shaped structure is particularly suitable for being used in regions with more mosquitoes (such as south China).

In this patent application, the acceleration chamber is mainly composed of three parts, namely: an inner sidewall, an outer sidewall, and an annular sidewall. Wherein, inside wall and lateral wall are two lateral walls that parallel interval set up, vertical setting. The inner side wall edge part is fixedly connected with the indoor end of the pipeline. Because this patent application is when the installation, the inside wall all is the inside wall that pastes indoor wall or window setting, generally invisible, so called the inside wall of this patent application. The outer sidewall, opposite the inner sidewall, is generally exposed and is generally visible, and is thus referred to as the outer sidewall. The annular side wall is wrapped on the corresponding side parts of the inner side wall and the outer side wall, so that a relatively closed cavity structure is formed by the inner side wall, the outer side wall and the annular side wall. In this patent application, the middle of the outer side wall is provided with an air inlet, and the air inlet is not arranged at the center of the outer side wall but arranged at a position deviated from the center. The arrangement leaves a space for the bell mouth-shaped exhaust passage in the acceleration cavity.

Install centrifugal fan on the inner wall of the inside wall of cavity with higher speed, centrifugal fan's mounted position is located the inner wall middle part of inside wall but skew inside wall center setting, sets up like this, also reserves the space for the bell mouth form exhaust passage in the cavity with higher speed. In this patent application, centrifugal fan's fan corresponds the setting with the air inlet position around. In actual production, if the air inlet is arranged in a circular shape, the air inlet and the centrifugal fan are coaxially arranged. The arrangement is that indoor air can uniformly enter the centrifugal fan through the air inlet during air exchange. The centrifugal fan has the main functions of sucking the air in the air inlet into the accelerating cavity and performing centrifugal spiral acceleration, so that negative pressure can be formed in the air inlet to absorb more air and mosquitoes, and the unidirectional valve can be ejected by strong wind pressure to quickly discharge the indoor air. In the structure of the positive Z shape, the extending track of the inner cavity wall (mainly the inner wall of the annular side wall) of the accelerating cavity is approximately in a 6 shape with a closed upper end. If the inner cavity of the acceleration chamber is longitudinally sectioned, the longitudinal section will be a spiral radiating section resembling a snail shell. The centrifugal fan is installed in an inner cavity at the lower part of the 6-shaped structure, namely in an acceleration cavity corresponding to an o-shape contained in the lower part of the 6-shaped structure. The centrifugal fan is not arranged coaxially or concentrically with the o-shaped portion but is arranged eccentrically, so that a smooth c-shaped like exhaust passage is formed between the fan and the ring side wall. As mentioned above, because the whole annular side wall is 6-shaped, a 6-shaped extended exhaust duct is formed between the periphery of the fan rotation track and the inner cavity wall of the acceleration cavity. In this patent application, the extended end of the upper 6-shaped part is connected to the indoor end of the duct, so that the air inlet, the fan, the air outlet and the duct form a complete air flow channel. Viewed in the air flow path, this air flow channel is approximately "positive zigzag". In this patent application, the exhaust passage is the horn mouth form that becomes thick gradually from the fan to the pipeline, sets up like this mainly in order to let by the indoor air of centrifugal fan suction pressurization or mosquito can discharge fast, raises the efficiency. In this patent application, install power source and the switch of being connected with centrifugal fan electricity on the acceleration cavity, can control very conveniently, it is very simple to operate.

In this patent application, install the check valve on the pipeline inner wall, the check valve can only make the air flow outdoor from indoor. The one-way valve is automatically closed under the action of self gravity, so that outdoor air and mosquitoes cannot enter the accelerating cavity and further cannot enter the room. The opening of the one-way valve is determined by the air pressure in the acceleration cavity, when the power supply is switched on, the centrifugal fan drives high-pressure air to overcome the gravity of the one-way valve so as to jack the one-way valve, and indoor air is smoothly discharged. When the power supply is turned off, the high-pressure air in the acceleration cavity disappears, and the check valve is closed again by the self gravity of the check valve.

As an improvement, the check valve comprises a ring platform which is vertically and fixedly connected on the inner wall of the pipeline, the ring platform is obliquely arranged in a mode that the upper end of the ring platform is close to the indoor end and the lower end of the ring platform is close to the outdoor end, a stay bar is fixedly connected between the upper end and the lower end of the ring platform, a circular elastic fan blade is installed on the stay bar through an installation part, and the circumferential part of the elastic fan blade can cover the leeward side of the ring platform.

In the present patent application, the non-return valve is mainly composed of four parts, namely: the ring platform, the vaulting pole, elasticity fan piece, installed part. Wherein, the ring platform and the stay bar are main frame structures of the one-way valve. The ring platform is a vertically arranged oval ring structure, and the outer peripheral wall of the ring platform is fixedly connected with the inner wall of the pipeline correspondingly. In this patent application, the loop platform is the slope setting, and the mode that the loop platform was close to indoor end and lower extreme was close to outdoor end according to the upper end promptly, and the purpose that sets up like this is mainly in order to utilize elasticity fan blade self gravity and realize the self-closing function. The stay bar is fixedly connected between the highest end and the lowest end of the ring platform and is vertically arranged. The elastic fan blades are installed on the supporting rods through installation parts and are oval corresponding to the circular table. The elastic fan blades can cover the leeward side of the circular platform, but are slightly smaller than the periphery of the circular platform, and the arrangement is mainly used for facilitating smooth opening of the fan blades. The frame structure formed by the support rods and the ring platforms is similar to a transversely arranged ' Chinese character ' ri ', and the arrangement is mainly used for structurally dividing the elastic fan blade into a left fan blade and a right fan blade. In this patent application, the leeward side lateral wall of vaulting pole and ring platform is the parallel and level setting, can guarantee like this when the elasticity flabellum is closed with vaulting pole, ring platform complex tightness. During actual production, the elastic fan blades are preferably made of silica gel, so that the elasticity is good, the corrosion resistance is high, and the service life is prolonged. When the electric fan is used, the elastic fan blades are automatically buckled on the ring table by means of self gravity and elasticity, so that the automatic closing function is realized, and when a power supply is switched on, the elastic fan blades are jacked up by high-pressure air in the acceleration cavity to be opened.

As further improvement, elasticity fan piece is divided into two and controls half by the vaulting pole, and half leeward side laminating has than half little semicircle board, and semicircle board middle part is equipped with the diaphragm orifice, and half middle part sets firmly the fan nail that can pass the diaphragm orifice, and fan nail end rigid coupling has the fan stopper that can prevent fan nail from the slippage of diaphragm orifice.

In this patent application, the elastic fan blade is divided into left and right halves by a stay, and a semi-circular plate slightly smaller than the halves is attached to the leeward side of the halves. The main purpose of the arrangement is to support the half-piece by using the structural strength of the semicircular plate, so that the half-piece is in a plane state when being buckled on the ring platform, and the buckling tightness is ensured. Meanwhile, on the premise that the semi-circular plate enhances the supporting strength of the semi-circular plate, namely the elastic fan blade, can be made thinner, so that the opening is easier, and the opening angle is larger. In this patent application, semicircle board middle part is equipped with at least one diaphragm orifice, and half piece middle part sets firmly the fan nail that can pass the diaphragm orifice, and fan nail end rigid coupling has the fan stopper that can prevent fan nail from the diaphragm orifice slippage. The main purpose of the arrangement is to ensure that the connection between the semicircular plate and the half piece is firmer and the production and assembly are more convenient.

As an improvement, the mounting piece comprises at least two positioning rods fixedly arranged on the supporting rod, the positioning rods extend along the air flowing direction, positioning holes corresponding to the positioning rods are formed in the middle of the elastic fan piece, the mounting piece further comprises positioning strips arranged on the lee side of the elastic fan piece and corresponding to the supporting rod, and clamping holes matched with the positioning rods in a clamping mode are formed in the positioning strips.

In this patent application, the installed part includes the locating lever of setting firmly perpendicularly on the vaulting pole leeward side, and the locating lever extends the setting along the air flow direction. The middle part of the elastic fan blade is provided with a positioning hole corresponding to the positioning rod, so that the elastic fan blade can be sleeved on the positioning rod. The mounting part further comprises a positioning strip which is arranged corresponding to the support rod, and a clamping hole which is tightly matched with the positioning rod in a clamping mode is formed in the positioning strip. The positioning strip is attached to the leeward side of the elastic fan blade, and the positioning strip is tightly pressed and fixed on the support rod through the clamping matching of the clamping hole and the positioning rod. In this patent application, the quantity of locating lever is two at least to guarantee the fixed reliability of elasticity fan piece.

As an improvement, the peripheral part of the windward side of the outer side wall is fixedly connected with an air induction arc plate which smoothly extends towards the indoor, and the air induction arc plate and the middle part of the outer side wall form a cavity towards the indoor.

In this patent application, the peripheral portion of the windward side of lateral wall is fixedly connected with an induced air arc plate, and extends to indoor rounding off. The air inducing arc plate is annular, and the air inducing arc plate and the middle part (air inlet position) of the outer side wall form a chamber cavity facing the room. One of the main functions of the basin cavity is to lead the air inlet to the indoor and enlarge the air-inducing area, thus improving the air exchange efficiency.

As a further improvement, the middle part of the windward side of the outer side wall is provided with outer covers at intervals through connecting pieces, and disc-shaped air inlet channels are formed among the outer covers, the air inducing arc plates and the outer side wall; the connecting piece includes a plurality of cover barrels of rigid coupling on the dustcoat inner wall, the rigid coupling has the section of thick bamboo pole with cover barrel cartridge complex on the lateral wall, installs the magnetic path that can adsorb the section of thick bamboo pole in the barrel head of cover barrel.

In this patent application, the dustcoat is installed through the connecting piece interval in the windward side middle part of lateral wall, and one of the effect of dustcoat is exactly and forms discoid inlet air channel between induced air arc board, the lateral wall, and the cross section is c shape or u shape. The air inlet channel is provided with the annular air suction opening, so that indoor air can be adsorbed more uniformly, and the suction force is stronger. In the present patent application, the connection is mainly made up of three parts, namely: cover cylinder, section of thick bamboo pole and magnetic path. Wherein, the cover section of thick bamboo rigid coupling is on the dustcoat inner wall, and the section of thick bamboo pole rigid coupling is on the lateral wall, section of thick bamboo pole and cover section of thick bamboo cartridge cooperation. The cylinder rod is generally made of iron rod or ferromagnetic material. The magnetic block is arranged in the cylinder bottom of the cover cylinder, and when the cylinder rod and the cover cylinder are in plug-in fit, the magnetic block and the cylinder rod are adsorbed together, so that the outer cover is fixed. When the cover cylinder is disassembled, the cover cylinder and the cylinder rod only need to be pulled out, and the operation is very simple.

As an improvement, a luminescent lamp capable of attracting mosquitoes is arranged on the inner wall of the outer cover and is electrically connected with the switch.

One of the main functions of the light emitting lamp is to attract mosquitoes. Because the luminescent lamp is arranged on the inner wall of the outer cover, namely, the luminescent lamp corresponds to the air inlet, when mosquitoes are attracted to the air inlet, the mosquitoes are sucked into the accelerating cavity and discharged to the outside, and the mosquito repelling effect is achieved. If the light-emitting lamp adopts an ultraviolet lamp or an electric mosquito lamp with an insecticidal function, mosquitoes can be directly killed and then discharged outdoors, so that hidden troubles are eliminated. The centrifugal fan and the luminescent lamp are controlled by a switch, and the centrifugal fan and the luminescent lamp work simultaneously.

To sum up, adopt new trend exhaust system of this kind of structure, rational in infrastructure has the one-way circulation function, and the air can only be outdoor from indoor outflow, has the function that prevents the mosquito and gets into indoorly, can suck indoor air with radial mode, and the coverage area is bigger, can discharge the indoor air of suction behind accelerating with centrifugal spiral acceleration mode, still has the effect of indoor mosquito attraction and accelerating the outdoor row, and is simple to use moreover, and the commonality is good.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings:

fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is a diagram illustrating the effect of the present invention;

FIG. 3 is a schematic view of the fitting structure of the basin and the air inlet;

FIG. 4 is a schematic view of a mating structure of the housing and the light emitting lamp;

FIG. 5 is a schematic view of the mating structure of the centrifugal fan, the ring side wall (outer layer, inner layer) and the air inlet;

FIG. 6 is a schematic view of the mating structure of the spiral radiating surface and the pipe;

FIG. 7 is a schematic view of a structure of a centrifugal fan and an exhaust passage;

FIG. 8 is a schematic structural view of a closed state of the check valve;

fig. 9 is a structural view showing a state in which the check valve is opened.

Detailed Description

As shown in the figure, the fresh air exhaust system comprises a pipeline 1 which is transversely communicated with the indoor part and the outdoor part, and a one-way valve 2 which only enables air to flow from the indoor part to the outdoor part is arranged on the inner wall of the pipeline. The indoor end of the pipeline is fixedly connected with an accelerating cavity 3 communicated with the pipeline. The accelerating cavity comprises an inner side wall 4 tightly attached to an indoor wall or a window, and an outer side wall 5 opposite to the inner side wall at intervals, wherein the corresponding side parts of the inner side wall and the outer side wall are provided with closed annular side walls 6. The middle part of the outer side wall is provided with an air inlet 7 which is deviated from the center of the outer side wall. The centrifugal fan 8 that the skew inside wall center set up is installed to the inside wall mid-mounting in the cavity with higher speed, and centrifugal fan's fan corresponds the setting with the air inlet. The extending track of the inner cavity wall of the accelerating cavity is 6-shaped, and the longitudinal section of the inner cavity of the accelerating cavity is a spiral radiating surface 9 in a snail shell shape. A 6-shaped flared exhaust passage 10 extending is formed between the periphery of the fan rotation track and the inner cavity wall of the acceleration cavity. The air outlet end of the exhaust passage is connected with the indoor end of the pipeline more coarsely than the air inlet end. The accelerating cavity is provided with a power interface 30 and a switch 31 which are electrically connected with the centrifugal fan.

The main structure of the present patent application comprises a helical air flow channel shaped like a Z. The Z-shaped spiral channel mainly comprises a pipeline, an accelerating cavity and an air inlet, wherein the forming modes mainly comprise two modes, namely a mode that the air inlet is arranged at a lower air outlet (pipeline) and at an upper position, in the mode, the air inlet represents the horizontal stroke at the bottom of a Z-shaped character in the Z-shaped spiral channel structure, the accelerating cavity represents the folding stroke at the middle part of the Z-shaped character in the Z-shaped spiral channel structure, and the pipeline represents the horizontal stroke at the top of the Z-shaped character in the Z-shaped spiral channel structure. For convenience of description, this approach is referred to as a "positive zigzag" structure or approach. The other mode is that the air inlet is arranged at the upper air outlet (pipeline) and the lower air outlet (pipeline), in the mode, the air inlet represents the horizontal stroke at the top of the Z-shaped spiral channel structure, the acceleration cavity represents the folding stroke at the middle of the Z-shaped spiral channel structure, and the pipeline represents the horizontal stroke at the bottom of the Z-shaped spiral channel structure. For convenience of description, this approach is referred to as an "inverted Z" configuration or approach. In this patent application, the acceleration chamber is a structure similar to a short column placed transversely, the vertical dimension of which is much greater than the axial dimension. Because the air inlet of the inverted Z-shaped structure or mode is arranged below the upper air outlet, even if outdoor mosquitoes climb into or fly into the cavity at the lower part of the acceleration cavity through the pipeline, the outdoor mosquitoes can only be limited to move in the cavity at the lower part of the acceleration cavity and are difficult to climb along the smooth inner wall. After the power supply is switched on, the mosquitoes trapped in the accelerating cavity can be discharged outdoors, and the effect of preventing the mosquitoes from entering the room is achieved. Therefore, the structure or the mode of the inverted Z-shaped structure is particularly suitable for being used in regions with more mosquitoes (such as south China).

In this embodiment, the check valve includes a ring platform 11 vertically and fixedly connected to the inner wall of the pipeline, the ring platform is obliquely arranged in such a manner that the upper end is close to the indoor end and the lower end is close to the outdoor end, a stay bar 12 is fixedly connected between the upper end and the lower end of the ring platform, a circular elastic fan blade 13 is mounted on the stay bar through a mounting member, and the circumference of the elastic fan blade can cover the leeward side of the ring platform. In the present patent application, the non-return valve is mainly composed of four parts, namely: the ring platform, the vaulting pole, elasticity fan piece, installed part. Wherein, the ring platform and the stay bar are main frame structures of the one-way valve. The ring platform is a vertically arranged oval ring structure, and the outer peripheral wall of the ring platform is fixedly connected with the inner wall of the pipeline correspondingly. In this patent application, the loop platform is the slope setting, and the mode that the loop platform was close to indoor end and lower extreme was close to outdoor end according to the upper end promptly, and the purpose that sets up like this is mainly in order to utilize elasticity fan blade self gravity and realize the self-closing function. The stay bar is fixedly connected between the highest end and the lowest end of the ring platform and is vertically arranged. The elastic fan blades are installed on the supporting rods through installation parts and are oval corresponding to the circular table. The elastic fan blades can cover the leeward side of the circular platform, but are slightly smaller than the periphery of the circular platform, and the arrangement is mainly used for facilitating smooth opening of the fan blades. The frame structure formed by the support rods and the ring platforms is similar to a transversely arranged ' Chinese character ' ri ', and the arrangement is mainly used for structurally dividing the elastic fan blade into a left fan blade and a right fan blade. In this patent application, the leeward side lateral wall of vaulting pole and ring platform is the parallel and level setting, can guarantee like this when the elasticity flabellum is closed with vaulting pole, ring platform complex tightness. During actual production, the elastic fan blades are preferably made of silica gel, so that the elasticity is good, the corrosion resistance is high, and the service life is prolonged. When the electric fan is used, the elastic fan blades are automatically buckled on the ring table by means of self gravity and elasticity, so that the automatic closing function is realized, and when a power supply is switched on, the elastic fan blades are jacked up by high-pressure air in the acceleration cavity to be opened.

In this embodiment, elasticity fan piece is divided into two half 14 about by the vaulting pole, and half leeward side laminating has than half little semicircle board 15, and semicircle board middle part is equipped with the diaphragm orifice 16, and half middle part sets firmly the fan nail that can pass the diaphragm orifice, and the terminal rigid coupling of fan nail has the fan stopper 18 that can prevent fan nail from the diaphragm orifice slippage. In this patent application, the elastic fan blade is divided into left and right halves by a stay, and a semi-circular plate slightly smaller than the halves is attached to the leeward side of the halves. The main purpose of the arrangement is to support the half-piece by using the structural strength of the semicircular plate, so that the half-piece is in a plane state when being buckled on the ring platform, and the buckling tightness is ensured. Meanwhile, on the premise that the semi-circular plate enhances the supporting strength of the semi-circular plate, namely the elastic fan blade, can be made thinner, so that the opening is easier, and the opening angle is larger. In this patent application, semicircle board middle part is equipped with at least one diaphragm orifice, and half piece middle part sets firmly the fan nail that can pass the diaphragm orifice, and fan nail end rigid coupling has the fan stopper that can prevent fan nail from the diaphragm orifice slippage. The main purpose of the arrangement is to ensure that the connection between the semicircular plate and the half piece is firmer and the production and assembly are more convenient.

In this embodiment, the installed part is including setting firmly two at least locating levers 19 on the vaulting pole, and the locating lever extends the setting along the air flow direction, and elasticity fan piece middle part is equipped with the locating hole that corresponds with the locating lever, still including setting up in elasticity fan piece leeward side and with the locating bar 21 that the vaulting pole corresponds the setting, be equipped with the chucking hole 22 with the locating bar chucking tight fit on the locating bar. In this patent application, the installed part includes the locating lever of setting firmly perpendicularly on the vaulting pole leeward side, and the locating lever extends the setting along the air flow direction. The middle part of the elastic fan blade is provided with a positioning hole corresponding to the positioning rod, so that the elastic fan blade can be sleeved on the positioning rod. The mounting part further comprises a positioning strip which is arranged corresponding to the support rod, and a clamping hole which is tightly matched with the positioning rod in a clamping mode is formed in the positioning strip. The positioning strip is attached to the leeward side of the elastic fan blade, and the positioning strip is tightly pressed and fixed on the support rod through the clamping matching of the clamping hole and the positioning rod. In this patent application, the quantity of locating lever is two at least to guarantee the fixed reliability of elasticity fan piece.

In this embodiment, the peripheral portion of the windward side of the outer sidewall is fixedly connected with an air-inducing arc plate 23 which extends smoothly into the chamber, and the air-inducing arc plate and the middle portion of the outer sidewall form a chamber cavity 24 facing the chamber. In this application, an air inducing arc plate 23 is fixed to the periphery of the windward side of the outer side wall and extends smoothly into the room. The air inducing arc plate is annular, and the air inducing arc plate and the middle part (air inlet position) of the outer side wall form a chamber cavity facing the room. One of the main functions of the basin cavity is to lead the air inlet to the indoor and enlarge the air-inducing area, thus improving the air exchange efficiency.

In the embodiment, the middle part of the windward side of the outer side wall is provided with an outer cover 25 at intervals through a connecting piece, and a disc-shaped air inlet channel 26 is formed among the outer cover, the air inducing arc plate and the outer side wall; the connecting piece comprises a plurality of cover cylinders 27 fixedly connected on the inner wall of the outer cover, cylinder rods 28 which are in plug-in fit with the cover cylinders are fixedly connected on the outer side wall, and magnetic blocks 29 which can adsorb the cylinder rods are installed in the cylinder bottoms of the cover cylinders. In this patent application, the dustcoat is installed through the connecting piece interval in the windward side middle part of lateral wall, and one of the effect of dustcoat is exactly and forms discoid inlet air channel between induced air arc board, the lateral wall, and the cross section is c shape or u shape. The air inlet channel is provided with the annular air suction opening, so that indoor air can be adsorbed more uniformly, and the suction force is stronger. In the present patent application, the connection is mainly made up of three parts, namely: cover cylinder, section of thick bamboo pole and magnetic path. Wherein, the cover section of thick bamboo rigid coupling is on the dustcoat inner wall, and the section of thick bamboo pole rigid coupling is on the lateral wall, section of thick bamboo pole and cover section of thick bamboo cartridge cooperation. The cylinder rod is generally made of iron rod or ferromagnetic material. The magnetic block is arranged in the cylinder bottom of the cover cylinder, and when the cylinder rod and the cover cylinder are in plug-in fit, the magnetic block and the cylinder rod are adsorbed together, so that the outer cover is fixed. When the cover cylinder is disassembled, the cover cylinder and the cylinder rod only need to be pulled out, and the operation is very simple.

In this embodiment, a light emitting lamp 32 capable of attracting mosquitoes is installed on the inner wall of the outer cover, and the light emitting lamp is electrically connected with the switch. One of the main functions of the light emitting lamp is to attract mosquitoes. Because the luminescent lamp is arranged on the inner wall of the outer cover, namely, the luminescent lamp corresponds to the air inlet, when mosquitoes are attracted to the air inlet, the mosquitoes are sucked into the accelerating cavity and discharged to the outside, and the mosquito repelling effect is achieved. If the light-emitting lamp adopts an ultraviolet lamp or an electric mosquito lamp with an insecticidal function, mosquitoes can be directly killed and then discharged outdoors, so that hidden troubles are eliminated. The centrifugal fan and the luminescent lamp are controlled by a switch, and the centrifugal fan and the luminescent lamp work simultaneously.

In this embodiment the annular side wall is composed of two parts comprising a hollow structure, an outer layer 33 on the outside and an inner layer 34 surrounded by the outer layer. This is designed primarily to save product weight and cost. In practice, the outer layer and the inner layer may be designed as a solid structure instead of a hollow structure, i.e., the outer layer and the inner layer are designed as a solid integral structure.

Claims

1. Fresh air exhaust system, including horizontal indoor outer pipeline of intercommunication (1), characterized by: the inner wall of the pipeline (1) is provided with a check valve (2) which can only lead air to flow from indoor to outdoor, the indoor end of the pipeline (1) is fixedly connected with an accelerating cavity (3) communicated with the pipeline (1), the accelerating cavity comprises an inner side wall (4) tightly attached to an indoor wall or a window, and also comprises an outer side wall (5) opposite to the inner side wall at intervals, the corresponding edge parts of the inner side wall and the outer side wall are provided with a closed annular side wall (6), the middle part of the outer side wall is provided with an air inlet (7) deviated from the center of the outer side wall, the middle part of the inner side wall in the accelerating cavity is provided with a centrifugal fan (8) deviated from the center of the inner side wall, the fan of the centrifugal fan is arranged corresponding to the air inlet, the extending track of the inner cavity wall of the accelerating cavity is 6-shaped, the longitudinal section of the inner cavity of the accelerating cavity is a spiral, the air outlet end of the exhaust passage is connected with the indoor end of the pipeline more than the air inlet end, and the accelerating cavity is provided with a power interface (30) and a switch (31) which are electrically connected with the centrifugal fan.

2. The fresh air exhaust system as claimed in claim 1, wherein: the check valve (2) comprises a ring platform (11) which is vertically and fixedly connected to the inner wall of the pipeline, the ring platform is obliquely arranged in a mode that the upper end of the ring platform is close to the indoor end and the lower end of the ring platform is close to the outdoor end, a support rod (12) is fixedly connected between the upper end and the lower end of the ring platform, a circular elastic fan blade (13) is installed on the support rod through an installation part, and the circumferential part of the elastic fan blade can cover the leeward side of the ring platform.

3. The fresh air exhaust system as claimed in claim 2, wherein: elasticity fan piece is divided into two half left and right sides (14) by the vaulting pole, and the leeward side laminating of half has than half semicircle board (15) that are little, and semicircle board middle part is equipped with diaphragm orifice (16), and half middle part sets firmly the fan nail that can pass the diaphragm orifice, and fan nail end rigid coupling has fan stopper (18) that can prevent fan nail from the diaphragm orifice slippage.

4. The fresh air exhaust system as claimed in claim 3, wherein: the mounting piece comprises at least two positioning rods (19) fixedly arranged on the supporting rod, the positioning rods extend along the air flowing direction, positioning holes corresponding to the positioning rods are formed in the middle of the elastic fan blade, the mounting piece further comprises positioning strips (21) arranged on the lee side of the elastic fan blade and corresponding to the supporting rod, and clamping holes (22) matched with the positioning rods in a clamping mode are formed in the positioning strips.

5. A fresh air exhaust system according to any one of claims 1 to 3 wherein: the periphery of the windward side of the outer side wall is fixedly connected with an air induction arc plate (23) which smoothly extends towards the indoor, and the air induction arc plate and the middle part of the outer side wall form a cavity (24) facing the indoor.

6. The fresh air exhaust system as claimed in claim 5, wherein: outer covers (25) are arranged in the middle of the windward side of the outer side wall at intervals through connecting pieces, and disc-shaped air inlet channels (26) are formed among the outer covers, the air inducing arc plates and the outer side wall; the connecting piece includes a plurality of cover section of thick bamboo (27) on the dustcoat inner wall of rigid coupling, the rigid coupling has on the lateral wall with cover section of thick bamboo cartridge complex section of thick bamboo pole (28), installs in the barrel head of cover section of thick bamboo and can adsorb magnetic path (29) of section of thick bamboo pole.

7. The fresh air exhaust system as claimed in claim 6, wherein: the inner wall of the outer cover is provided with a luminescent lamp (32) capable of attracting mosquitoes, and the luminescent lamp is electrically connected with the switch.