TWI605230B - Ventilator - Google Patents

Description

Ventilation fan

The present invention relates to a fan, and more particularly to a ventilating fan that can direct a space internal gas to the outside of the space.

Please refer to FIG. 1 , which is a conventional ventilating fan 9 having a body 91 and a panel 92 . The body 91 has a casing 911. A turbofan 912 is rotatably disposed in the casing 911 and located between the air inlet and the exhaust port of the casing 911. The outer casing 911 is provided with an assembly portion 913 to be coupled to the ceiling C at a position closer to its intake port. The panel 92 is also combined with the ceiling C and covers the assembly portion 913; the panel 92 is additionally provided with a plurality of air guiding openings 921. In use, the panel 92 is exposed indoors, and most of the body 91 is located above the ceiling C and connects the exhaust port of the housing 911 to the exhaust duct of the building. As described above, when the turbofan 912 rotates, the indoor air can be sucked into the outer casing 911 through the air guiding opening 921 of the panel 92, and then flowed into the exhaust duct of the building from the exhaust port of the outer casing 911. An embodiment similar to the conventional ventilating fan 9 has been disclosed in the "Ventilation Device" patent case of the Republic of China Announcement No. I393846.

There is a gap A between the panel 92 and the assembly portion 913 of the casing 911, and the panel 92 and the casing 911 are easily combined with the ceiling C to leave a slight gap. Therefore, when assembling the conventional ventilating fan 9, a sponge pad 93 is usually installed between the panel 92 and the outer casing 911 and the ceiling C, so that the panel 92 and the outer casing 911 can be closely adhered to the ceiling C, avoiding the conventional knowledge. When the ventilating fan 9 operates, noise is generated due to air leakage.

However, the addition of the sponge pad 93 can temporarily solve the problem of operational noise, but the structure of the sponge pad 93 is loose and partially exposed to contact with the indoor or outdoor environment, and is affected by factors such as moisture and dust. After a period of time, it will gradually deteriorate, age, peel off and become invalid. It cannot be used for a long time and needs to be regularly repaired and replaced. Moreover, the sponge pad 93 is also one of the components to be assembled and positioned, which adds to the cumbersomeness of the bottom-up assembly process.

In view of this, the conventional ventilation fan does have the need to improve.

In order to solve the above problems, the present invention provides a ventilating fan, which can directly form a structure for blocking airflow from a housing and a frame seat, so that the housing and the frame seat can be assembled to a spacer (for example, a ceiling or a wall surface, etc.). No need to add a sponge pad.

The following directional terms are used in the present invention, such as "before", "after", "left", "right", "upper (top)", "lower", "inside", "outside", The singularity of the present invention is intended to be illustrative only and not to limit the invention.

The ventilating fan of the present invention comprises: a body having a housing and a wheel, the housing is provided with an air inlet and an air outlet, and the fan is disposed at the air inlet and the air outlet And a frame having a ring wall extending toward the housing, the ring wall forming an air inlet; wherein the housing is provided with at least one first choke extending toward the frame a wall, the frame seat is provided with at least one second choke wall extending toward the housing, the second choke wall encircling the outer circumference of the annular wall; the first choke wall enclosing the first The outer or inner circumference of the second choke wall.

Accordingly, the ventilating fan of the present invention can directly form a structure for blocking the airflow from the housing and the frame seat, so that the housing and the frame seat can be assembled to the spacer (for example, a ceiling or a wall surface, etc.), and it is not necessary to add The sponge pad is installed, and even if the housing or the frame has a slight gap between the spacer and the spacer, the structure of the airflow can be effectively prevented from generating noise due to air leakage; therefore, the ventilation fan of the present invention Quiet operation, improved assembly convenience, and durability Use, no need to replace consumables that form a gas-tight effect.

The first choke wall has a first protruding height, and the second choke wall has a second protruding height; the first choke wall overlaps the projection of the second choke wall The range is greater than one-fifth of the first protruding height, or greater than one-fifth of the second protruding height; according to the path of increasing the flow of the airflow, the airflow flowing therethrough is not only greatly changed, It is also necessary to have sufficient flow force to pass through the structure of the stop airflow, and to ensure that the airflow is difficult to flow therefrom.

The housing is provided with an assembly portion and a guiding wall adjacent to the frame, and one end of the guiding wall is connected to the assembly portion, and the guiding wall extends toward the fan wheel for the guiding wall The other end forms the air inlet, the air inlet is aligned in the maximum radial extent of the fan blade of the fan wheel; the airflow is guided by the guide wall to accurately concentrate the flow to the fan wheel, which helps the fan wheel Effectively exert its efficiency of guiding the flow of air.

The ventilating fan of the present invention may further comprise a shielding member disposed in the air inlet; the user is less likely to see the internal components of the ventilating fan from the inside of the room, and has the effect of improving the appearance of the ventilating fan.

The shielding member is a light group, and the guiding wall guides the airflow through the upper portion of the light group; and has the effects of improving the heat dissipation efficiency of the light group.

The shielding member is a light group, and an air gap is formed between the outer circumference of the shielding member and the annular wall to guide the airflow; and the heat dissipation efficiency of the light group is improved.

Wherein, the shielding member is entirely retracted in the air inlet, or the bottom surface of the shielding member is aligned with the bottom surface of the annular wall; so that the thickness of the whole ventilation fan is not thickened by providing the shielding member, and the overall ventilation fan can be raised. The texture.

The second choke wall of the frame includes a second inner choke wall and a second outer choke wall, and the second outer choke wall surrounds the second inner choke wall a circumferential groove formed between the second outer choke ring wall and the second inner choke ring wall, the first choke of the shell The annular wall penetrates into the annular groove in an opposite direction; the airflow must pass through a large number of turns to flow, and has the effect of lifting and preventing the airflow.

Wherein, the ventilating fan may further comprise a second airtight ring, the two airtight rings being respectively coupled to the second inner choke ring wall and the second outer choke ring wall to form a narrow gap between the two airtight rings The first choke wall of the shell penetrates or penetrates the slit; according to the narrowing of the air passage, the airtight effect is enhanced. Moreover, the two airtight ring can be attached to the first choke ring wall; according to the complete sealing of the air flow passage, the air sealing effect is further improved.

Wherein, the two airtight ring is of a ㄇ type, and is respectively sleeved at the opening of the second inner choke ring wall and the free end of the second outer choke ring wall; and has a lifting airtight ring and a choke ring The combination of wall stability and other effects.

Alternatively, the ventilating fan may further include an airtight ring coupled to the second inner choke ring wall and the second outer choke ring wall, the airtight ring having a clearance, the first of the housing The choke wall penetrates or penetrates the gap; it has the effects of improving assembly convenience and the like. Moreover, the inner surface of the gap can be attached to the first choke wall; thereby completely sealing the air passage, and further improving the airtight effect.

Wherein the airtight ring is of a ㄇ type, and is sleeved at the opening of the second inner choke ring wall and the free end of the second outer choke ring wall; and has a lifting airtight ring and a choke ring wall Combine stability and other effects.

The first choke wall of the housing includes a first inner choke wall and a first outer choke wall, and the first outer choke wall surrounds the first inner choke wall An outer circumference, and an annular groove is formed between the first outer choke ring wall and the first inner choke wall, and the second choke wall of the frame penetrates into the annular groove in an opposite direction; Convenience and other effects.

Wherein, the ventilating fan may further comprise a second airtight ring, wherein the two airtight rings are respectively coupled to the first inner choke ring wall and the first outer choke ring wall to form a narrow gap between the two airtight rings a second choke wall of the frame penetrates or penetrates the slit; Improve the airtight effect and other effects. Moreover, the two airtight ring can be attached to the second choke wall; according to the sealing of the air passage completely, the airtight effect is further improved.

Alternatively, the ventilating fan may further include an airtight ring coupled to the first inner choke ring wall and the first outer choke ring wall, the airtight ring having a clearance, and the second of the frame The choke wall penetrates or penetrates the gap; it has the effects of improving airtightness and improving assembly efficiency. Moreover, the inner surface of the gap is attached to the wall of the second choke ring; accordingly, the air passage is completely sealed, and the airtight effect is further improved.

Wherein, the housing is only provided with a single first choke wall, and the frame is only provided with a single second choke wall, and the second choke wall surrounds the first choke wall The outer circumference or the inner circumference; according to the effect of blocking the air flow by a simpler structure, it is more convenient to manufacture and the like.

Wherein, the ventilating fan may further comprise an airtight ring coupled to the first choke ring wall of the housing, the airtight ring enclosing a free end of the first choke ring wall, the airtight ring having An outer end surface is opposite to the free end of the first choke ring wall, the outer end surface is inclined toward the second choke ring wall of the frame, and the second choke ring wall abuts the airtight ring; Improve assembly convenience and other functions.

〔this invention〕

1‧‧‧ Ontology

11‧‧‧Shell

111‧‧‧air inlet

112‧‧‧Exhaust port

113‧‧‧Assembly Department

114‧‧‧ Guide wall

115‧‧‧First choke wall

115a‧‧‧First internal choke wall

115b‧‧‧First outer choke wall

116‧‧‧Circle

12‧‧‧fan wheel

2‧‧‧ frame

21‧‧‧ Ring wall

22‧‧‧Second choke wall

22a‧‧‧Second inner choke wall

22b‧‧‧Second outer choke wall

23‧‧‧Circle

3‧‧‧Shield

4, 4', 4" ‧ ‧ airtight ring

41‧‧‧   gap

42‧‧‧Outer end face

F‧‧‧Separators

G‧‧‧Slit

H‧‧‧Opening

H1‧‧‧first protruding height

H2‧‧‧second protruding height

R‧‧‧projection overlap range

S‧‧‧ inlet

[Use]

9‧‧‧Ventilator

91‧‧‧Ontology

911‧‧‧ Shell

912‧‧‧ turbofan

913‧‧‧Assembly Department

92‧‧‧ panel

921‧‧‧ air conduction opening

93‧‧‧Sponge mat

A‧‧‧ gap

C‧‧‧Ceiling

Figure 1: Schematic diagram of a side cross-sectional structure of a conventional ventilating fan.

Fig. 2 is a perspective view showing the exploded structure of the first embodiment of the present invention.

Fig. 3 is a side sectional view showing the first embodiment of the present invention.

Fig. 4 is a partially enlarged schematic view showing the first embodiment of the present invention.

Fig. 4a is a partially enlarged schematic view showing the addition of a two-airtight ring in the first embodiment of the present invention.

Figure 4b is a partially enlarged schematic view showing the addition of an airtight ring in the first embodiment of the present invention.

Fig. 5 is a partially enlarged schematic view showing a second embodiment of the present invention.

Figure 6 is a partially enlarged schematic view showing a third embodiment of the present invention.

Fig. 6a is a partially enlarged schematic view showing the addition of an airtight ring in the third embodiment of the present invention.

Figure 7 is a partially enlarged schematic view showing another aspect of the third embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent from the aspects of the appended claims. It is a first embodiment of the ventilating fan of the present invention, and the ventilating fan can be assembled at an opening H of a partition F (for example, a ceiling or a wall surface, etc.); the outer surface of the partition F is located at a space where the ventilating fan is intended Relatively outside, the inner surface of the spacer F is located in the opposite chamber of the space in which the ventilating fan is intended. The ventilating fan generally includes a body 1 and a frame 2, and the frame 2 is disposed at one end of the body 1.

The body 1 has a hollow housing 11 having an air inlet 111 and an exhaust port 112. A fan wheel 12 is rotatably disposed between the air inlet 111 and the air outlet 112. For driving the airflow from the air inlet 111 toward the exhaust port 112.

The shape of the housing 11 is not limited and can be changed according to design requirements. In the present embodiment, the housing 11 is a hollow housing that is assembled from a plurality of blocks. The housing 11 is provided with an assembly portion 113 and a guiding wall 114 adjacent to the frame 2 . The housing 11 can be assembled and fixed to the spacer F by the assembly portion 113, and the opening H of the spacer F is aligned inside the housing 11, and the housing 11 is mainly located at the ventilating fan. The outer space of the space; that is, when the partition F is a ceiling, the shell 11 is mainly located between the ceiling and the top wall surface of the building; when the partition F is a wall surface, the shell 11 is mainly located on the wall surface. outer.

One end of the guiding wall 114 is connected to the assembly portion 113, and the guiding wall 114 extends toward the fan wheel 12, so that the other end of the guiding wall 114 forms the above-mentioned air inlet 111, so as to guide the airflow to the fan. Wheel 12. In particular, the present embodiment selects the air inlet 111 to be aligned in the maximum radial extent of the blade of the fan wheel 12, so that the airflow guided by the guiding wall 114 is accurately concentrated to the fan wheel 12, The fan wheel 12 is assisted to effectively exert its efficiency of guiding the flow of air.

The frame 2 can be assembled and fixed on the inner surface of the spacer F, or the shell Block 11 is combined. The frame 2 has a ring wall 21 extending toward the housing 11, that is, the ring wall 21 extends through the opening H of the spacer F and extends toward the outdoor direction. The ring wall 21 encloses an air inlet S.

The ventilating fan can further include a shielding member 3, and the shielding member 3 can be combined with the part of the annular wall 21 to be accommodated in the air inlet S, so that the user can hardly see the internal components of the ventilating fan from the room, and has the ventilating fan. The effect of the appearance of texture. The shielding member 3 can be, for example, a decorative cover; or the shielding member 3 can also be a light group, so that the body of the ventilation fan of the present invention has a lighting function.

Moreover, when the shielding member 3 is selected as the lamp group, an air gap can be formed between the outer periphery of the shielding member 3 and the ring wall 21, so that the gas in the room can be simultaneously pulled in the process of flowing into the air inlet S. The air around the front of the lamp group flows into the air inlet S together, so that the air that gradually increases the temperature of the lamp group due to the operation of the lamp group is prevented from staying on the front side of the lamp group; and the guide seat 11 is guided. The wall 114 directs airflow through the back side of the light group (above the light group) to increase the heat dissipation efficiency of the light group by double cooling.

Further, the embodiment may further select that the shielding member 3 does not protrude beyond the bottom surface of the annular wall 21; that is, the shielding member 3 may be entirely retracted in the air inlet S, or the shielding member may be The bottom surface of the ring 3 is aligned with the bottom surface of the ring wall 21 so that the thickness of the entire ventilating fan is not thickened by the provision of the shielding member 3, and the ventilating fan is installed without damaging the flatness of the overall spacer F toward the indoor surface. Therefore, the overall ventilation fan can provide a user with a relatively simple and textured visual experience.

The housing 11 is provided with at least one first choke wall 115 extending toward the frame 2; the frame 2 is provided with at least one second choke wall 22 extending toward the housing 11 , The second choke wall 22 encircles the outer circumference of the ring wall 21. When assembling, the housing block 11 and the frame 2 are directly assembled to a predetermined position of the spacer F, so that the first choke wall 115 is enclosed around the outer circumference or the inner wall of the second choke wall 22. Week, by the first choke ring wall 115 and the second resistor The flow ring walls 22 together form a structure that blocks the flow of air so that the air flow must be turned 180 degrees here to flow, so that there is almost no air flow therethrough.

Therefore, when the fan wheel 12 is driven to rotate, the gas in the casing 11 can be driven to the exhaust port 112 of the casing 11, so that a negative pressure is formed in the casing 11, so that the gas in the chamber can pass through the inlet. The tuyere S flows into the casing 11, and is guided by the fan wheel 12, and is discharged to the outside through the exhaust port 112 of the casing 11, thereby achieving a ventilation effect.

In the process of ventilation, even if the housing 11 or the frame 2 is assembled to the spacer F with a slight gap, the first choke ring wall 115 and the second choke wall 22 can be The airflow structure formed together can effectively avoid the noise generated by the air leakage, so that the ventilation fan of the present invention can be quietly operated, and the sponge pad is not required to be assembled during the assembly process, and the assembly convenience can be improved, and the utility model can be used for a long time. There is no need to regularly repair and replace consumables that form a gas-tight effect.

Moreover, referring to FIG. 4, the first choke ring wall 115 of the housing 11 has a first protruding height H1, and the second choke wall 22 of the frame 2 has a second protruding height H2. To ensure that the first choke ring wall 115 and the second choke ring wall 22 can surely achieve the effect of blocking the air flow, the projection of the first choke ring wall 115 and the second choke ring wall 22 is preferably performed. The overlapping range R is greater than one fifth of the first protruding height H1 or greater than one fifth of the second protruding height H2 to lengthen the flow path of the airflow, so that the airflow flowing therethrough is not only large At the turn of the ground, there must be sufficient flow force to pass the structure of the airflow, so that it is difficult to circulate the airflow.

Based on the above technical concept, referring to the second and fourth embodiments, the first embodiment of the ventilating fan of the present invention selects the second choke ring wall 22 of the frame 2 to include a second inner choke wall 22a and a second outer portion. a choke ring wall 22b surrounding the outer circumference of the second inner choke ring wall 22a, and the second outer choke ring wall 22b and the second inner choke ring wall 22a A ring groove 23 is formed between them; after assembly, the first choke ring wall 115 of the housing 11 can penetrate into the ring groove 23 in an opposite direction. Accordingly, the structure of the blocking airflow allows the airflow to undergo a second 180 degree turn here. Folding can flow, so it can improve the effect of preventing airflow.

Referring to FIG. 4a, the ventilating fan of this embodiment may further comprise a second airtight ring 4, which may be, for example, a resilient material such as rubber or silicone. The two airtight rings 4 are respectively coupled to the second inner choke ring wall 22a and the second outer choke ring wall 22b to form a slit G between the two airtight rings 4. The two airtight rings 4 can be assembled and coupled to the second inner choke ring wall 22a and the second outer choke wall 22b, respectively, by socketing or bonding, or directly when the frame 2 is manufactured. The bag combines the second inner choke ring wall 22a and the second outer choke ring wall 22b. After assembly, the first choke ring wall 115 of the housing 11 can penetrate or penetrate the slit G, and the second airtight ring 4 can be closely attached to the first choke ring wall 115. The air passage is completely sealed to further enhance the airtight effect.

It is worth mentioning that, since the present invention can pre-assemble the airtight ring 4 to the second choke ring wall 22, even when the frame 2 is manufactured, the airtight ring 4 is directly coupled to the second choke ring wall 22 Therefore, when assembling the ventilating fan to the spacer F, it is not necessary to additionally install the sponge pad 93 like the conventional ventilating fan 9 (please refer to FIG. 1), and to ensure that the sponge pad 93 is sandwiched between the spacer F and the The airtight effect can be achieved by the predetermined position between the frame 2 or the housing 11. Therefore, even if the airtight ring 4 is provided, the present invention does not affect the assembly convenience and efficiency when assembling the ventilating fan to the spacer F. Moreover, the airtight ring 4 is a high-density material compared to the sponge pad, and the airtight ring 4 is disposed inside the ventilating fan, and the arrangement is not easy to have airflow, so the airtight ring 4 is relatively difficult. Deterioration and aging make the airtight ring 4 almost unnecessary to be replaced.

In the embodiment in which the airtight ring 4 is assembled and coupled to the second choke ring wall 22, the two airtight ring 4 can be substantially ㄇ-shaped, and respectively sleeved at the opening to the second inner choke ring. The wall 22a and the free end of the second outer choke ring wall 22b. When the first choke ring wall 115 of the housing 11 penetrates the slit G, the first choke ring wall 115 is pushed against the two airtight ring 4 to more closely cover the second inner choke. The ring wall 22a and the second outer choke ring wall 22b simultaneously support the second airtight ring 4 by the free ends of the second inner choke ring wall 22a and the second outer choke ring wall 22b The staggering is excessively moved, so that the bonding stability of the airtight ring 4 and the second choke ring wall 22 can be improved.

Similarly, referring to FIG. 4b, in another embodiment, a second inner choke ring wall 22a and the second outer choke ring wall 22b may be selected by a gas-tight ring 4', the airtight ring. 4' has a gap 41 through which the first choke ring wall 115 of the housing 11 penetrates or penetrates, and preferably the first surface of the housing 11 is attached to the inner surface of the housing 41 Flow ring wall 115. Thus, compared with the embodiment in which the second airtight ring 4 is assembled to the second inner choke ring wall 22a and the second outer choke ring wall 22b, respectively, the airtight ring 4' of the present embodiment is compared with the fourth embodiment. The second inner choke ring wall 22a and the second outer choke ring wall 22b can be combined at one time, which has better assembly convenience and can improve assembly efficiency.

Referring to FIG. 5, which is a second embodiment of the ventilating fan of the present invention, the second embodiment of the present invention is substantially the same as the first embodiment described above, and the main difference is that the second embodiment of the present invention is in the housing 11 Two first choke ring walls 115 are provided, and a single second choke ring wall 22 is provided in the frame 2.

In detail, the first choke ring wall 115 of the housing 11 includes a first inner choke wall 115a and a first outer choke wall 115b. The first outer choke wall 115b is surrounded by the first outer choke ring wall 115b. An outer circumference of the first inner choke ring wall 115a, and an annular groove 116 is formed between the first outer choke ring wall 115b and the first inner choke ring wall 115a. When assembled, the second choke wall 22 of the frame 2 can penetrate into the annular groove 116 in abutting position, and the first inner choke ring wall 115a and the first outer choke ring wall 115b of the housing 11 Together, the structure for blocking the airflow is formed to avoid noise generated by the air leakage when the ventilation fan operates. In addition, since the frame 2 is installed from the bottom up when the ventilating fan is installed, the housing 11 of this embodiment can be used for the user to see the ring groove 116, thereby making it easier to block the second block of the frame 2. The flow ring wall 22 is accurately aligned into the annular groove 116, which helps to improve assembly convenience.

Similarly, in this embodiment, the two airtight rings 4 shown in FIG. 4a can also be combined with the first inner choke ring wall 115a and the first outer choke ring wall 115b shown in FIG. 5, respectively. A slit G is formed between the two airtight rings 4. After assembly, the second choke wall of the frame 2 22 can penetrate or penetrate the slit G, and preferably the second airtight ring 4 is closely attached to the second choke ring wall 22 to enhance the airtight effect.

Alternatively, the airtight ring 4' shown in FIG. 4b may be combined with the first inner choke ring wall 115a and the first outer choke ring wall 115b shown in FIG. 5; the airtight ring 4 'With a gap 41, the second choke wall 22 of the frame 2 penetrates or penetrates the gap 41, and preferably the inner surface of the gap 41 is attached to the second choke wall 22.

Referring to Figures 6 and 7, which are a third embodiment of the ventilating fan of the present invention, the third embodiment of the present invention is substantially the same as the first embodiment described above, and the main difference is that the third embodiment of the present invention makes the casing The seat 11 is provided with only a single first choke wall 115, and the frame 2 is provided with only a single second choke wall 22. FIG. 6 is a view showing the first choke ring wall 115 of the casing 11 encircling the outer circumference of the second choke ring wall 22 of the frame 2, and FIG. 7 is the frame 2 The second choke wall 22 encircles the outer circumference of the first choke ring wall 115 of the casing 11; both of them can achieve the effect of blocking the air flow by a structure that is simpler and easier to manufacture.

Referring to FIG. 6a, when the ventilating fan of the embodiment is to be provided with an airtight ring 4" on the first choke ring wall 115 of the housing 11, the airtight ring 4" is preferably firmly combined by a combination of a package and a package. The first choke ring wall 115 of the housing 11. Wherein, the airtight ring 4" can cover the free end of the first choke ring wall 115, and the airtight ring 4" has an outer end surface 42 opposite to the first choke ring wall 115 of the housing 11. The free end, the outer end surface 42 can be inclined toward the second choke wall 22 of the frame 2 to guide the second choke wall 22 to smoothly slide to the inner side of the first choke wall 115. And maintaining contact with the airtight ring 4".

In summary, the ventilating fan of the present invention can directly form a structure for blocking the air flow from the housing seat and the frame seat, so that the housing and the frame seat can be assembled to the spacer (for example, a ceiling or a wall surface, etc.). The sponge pad is further added, and even if there is a slight gap between the seat or the frame and the spacer, the structure for blocking the airflow can effectively avoid the noise generated by the air leakage; therefore, the present invention The ventilating fan works quietly and improves assembly convenience and resistance For long-term use, there is no need to replace consumables that form an airtight effect.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧‧ Ontology

11‧‧‧Shell

111‧‧‧air inlet

112‧‧‧Exhaust port

113‧‧‧Assembly Department

114‧‧‧ Guide wall

115‧‧‧First choke wall

12‧‧‧fan wheel

2‧‧‧ frame

21‧‧‧ Ring wall

22‧‧‧Second choke wall

22a‧‧‧Second inner choke wall

22b‧‧‧Second outer choke wall

23‧‧‧Circle

3‧‧‧Shield

F‧‧‧Separators

H‧‧‧Opening

S‧‧‧ inlet

Claims (21)

A ventilating fan includes: a body having a housing and a wheel, the housing is provided with an air inlet and an air outlet, and the fan is disposed between the air inlet and the air outlet; And a frame seat having a ring wall extending toward the housing, the ring wall forming an air inlet; wherein the housing is provided with at least one first choke wall extending toward the frame. The frame is provided with at least one second choke wall extending toward the housing, the second choke wall enclosing the outer circumference of the annular wall; the first choke wall enclosing the second resistor The outer or inner circumference of the flow ring wall. The ventilating fan of claim 1, wherein the first choke wall has a first protruding height, and the second choke wall has a second protruding height; the first choke ring The projected overlap of the wall and the second choke wall is greater than one fifth of the first raised height or greater than one fifth of the second raised height. The ventilating fan of claim 1, wherein the housing is provided with an assembly portion and a guiding wall adjacent to the frame, and one end of the guiding wall is connected to the assembly portion, and the guiding wall is facing The fan wheel extends to form the air inlet at the other end of the guide wall, the air inlet being aligned in a maximum radial extent of the fan blade of the fan wheel. The ventilating fan of claim 3, further comprising a shielding member disposed in the air inlet. The ventilating fan of claim 4, wherein the shielding member is a light group, and the guiding wall guides airflow through the light group. The ventilating fan of claim 1, further comprising a shielding member disposed in the air inlet, an air gap is formed between the outer circumference of the shielding member and the annular wall to guide airflow, the shielding The piece is a light group. The ventilating fan of claim 1, further comprising a shielding member, the shielding member is entirely retracted in the air inlet, or the bottom surface of the shielding member is aligned with the bottom surface of the annular wall. The ventilating fan according to any one of the preceding claims, wherein the second choke wall of the frame comprises a second inner choke wall and a second outer choke wall. a second outer choke ring wall surrounds the outer circumference of the second inner choke ring wall, and an annular groove is formed between the second outer choke ring wall and the second inner choke ring wall, and the shell seat A choke wall penetrates into the annular groove. The ventilating fan of claim 8 further comprising a second airtight ring, the second airtight ring being respectively coupled to the second inner choke ring wall and the second outer choke ring wall for the second gas A slit is formed between the dense rings, and the first choke wall of the housing penetrates or penetrates the slit. The ventilating fan of claim 9, wherein the two airtight ring is attached to the first choke ring wall. The ventilating fan of claim 9, wherein the two airtight ring is of a ㄇ type, and the opening is respectively sleeved to the second inner choke ring wall and the second outer choke ring wall. At the end. The ventilating fan of claim 8, further comprising an airtight ring coupled to the second inner choke ring wall and the second outer choke ring wall, the airtight ring having a gap The first choke wall of the housing penetrates or penetrates the gap. The ventilating fan of claim 12, wherein the inner surface of the gap is attached to the first choke wall. The ventilating fan of claim 12, wherein the airtight ring is of a ㄇ type, and is sleeved at the opening of the second inner choke ring wall and the free end of the second outer choke ring wall . The ventilating fan according to any one of claims 1 to 7, wherein the first choke wall of the housing comprises a first inner choke wall and a first outer choke wall, First An outer baffle ring wall surrounds an outer circumference of the first inner choke ring wall, and an annular groove is formed between the first outer choke ring wall and the first inner choke ring wall, and the frame is second The baffle ring wall penetrates into the annular groove. The ventilating fan of claim 15 further comprising a second airtight ring, the second airtight ring being respectively coupled to the first inner choke ring wall and the first outer choke ring wall for the second gas A slit is formed between the dense rings, and a wall of the second choke ring of the frame penetrates or penetrates the slit. The ventilating fan of claim 16, wherein the two airtight ring is attached to the second choke ring wall. The ventilating fan of claim 15 further comprising an airtight ring coupled to the first inner choke ring wall and the first outer choke ring wall, the airtight ring having a gap The second choke wall of the frame penetrates or penetrates the gap. The ventilating fan of claim 18, wherein the inner surface of the gap is attached to the second choke wall. The ventilating fan according to any one of claims 1 to 7, wherein the housing is provided with only a single first choke wall, and the frame is only provided with a single second choke wall. The second choke ring wall surrounds the outer circumference or the inner circumference of the first choke wall. The ventilating fan of claim 20, further comprising an airtight ring coupled to the first choke wall of the housing, the airtight ring covering the first choke wall freely The airtight ring has an outer end surface opposite to the free end of the first choke ring wall, the outer end surface is inclined toward the second choke ring wall of the frame seat, and the second choke ring wall is abutted Connect the airtight ring.