CN107376078B - A dual-chamber low-noise structure of a household ventilator - Google Patents

Abstract

The invention discloses a dual-chamber low-noise structure of a household ventilator, comprising a hollow main body, a positive pressure cavity and a negative pressure cavity are arranged in the main body, and a rear end of the positive pressure cavity is provided with a penetrating main body to connect with external air The positive pressure cavity and the negative pressure cavity are connected with the breathing tube through the main pipe; the positive pressure cavity, the negative pressure cavity and the main pipe are alternately connected; the positive pressure cavity is provided with a first piston, the negative pressure cavity is A second piston is arranged in the pressure chamber, and the first piston and the second piston are simultaneously driven by the driving device. The purpose of the present invention is to solve the above problems and provide a dual-chamber low-noise structure of a household ventilator, which adopts a push-pull dual-chamber structure to solve the friction between the fan blade and the air and the bottle mouth effect, so that the noise is greatly reduced, and the structure It is compact and easy to produce; it adopts spiral flow channels and manifolds; it further improves the noise reduction effect.

Description

A dual-chamber low-noise structure of a household ventilator

technical field

The invention relates to the field of medical equipment, in particular to a dual-chamber low-noise structure of a household ventilator.

Background technique

At present, the ordinary positive pressure ventilation equipment on the market is too noisy when used, which seriously affects the sleep quality of patients and their families. Although it can relieve snoring, hypoventilation and other symptoms, it greatly reduces the mental outlook of patients, thereby affecting work, study, and quality of life. . In addition, long-term exposure to high-decibel noise environments can also damage the patient's hearing. Existing positive pressure ventilation equipment is generally used for the treatment of respiratory diseases such as sleep apnea syndrome and COPD (chronic airway obstructive disease). The feature of the equipment is that the centrifugal fan rotates in the cavity, the cavity has an air inlet near the center, and the fan blade has an air outlet in the tangential direction. Noise, currently generally used methods to eliminate noise are: shock absorption, sound absorption, sound insulation. The above methods are not ideal and do not fundamentally solve the noise problem. 90% of the noise is caused by the friction between the fan blade and the air and the bottle mouth effect. Simply doing sound insulation, sound absorption and shock absorption cannot achieve the ideal effect.

In view of these shortcomings, the present invention adopts a unique double-layer layout design, rotating three-dimensional soft air intake, and at the same time increases the design of the anti-noise return port of the air inlet and the design of the buffer cavity of the air outlet, so as to achieve a good noise reduction effect, and at the same time, it has space It has the characteristics of high utilization rate, compact structure, easy production and simple assembly.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems, to provide a dual-chamber low-noise structure of a household ventilator, which adopts a push-pull dual-chamber structure to solve the friction between the fan blade and the air and the effect of the bottle mouth, with low noise, compact structure and easy production. .

In order to achieve the above purpose, the technical solution adopted in the present invention is: a dual-chamber low-noise structure of a household ventilator, comprising a hollow main body (1), and a positive pressure chamber (2) and a negative pressure cavity (2) and a negative pressure cavity (2) and a negative A pressure chamber (3), the rear end of the positive pressure chamber (2) is provided with an air inlet (4) that runs through the main body (1) and is connected to external air; the positive pressure chamber (2) and the negative pressure chamber (3) The main pipe (51) is connected with the breathing pipe (5); one of the positive pressure chamber (2), the negative pressure chamber (3) and the main pipe (51) is electrically connected; the positive pressure chamber (2) is provided with There is a first piston (21), a second piston (31) is arranged in the negative pressure chamber (3), and the first piston (21) and the second piston (31) are simultaneously driven by the driving device (6).

Further, the tail ends of the positive pressure chamber (2) and the negative pressure chamber (3) are provided with annular balance belts (20) that can be deformed according to changes in the pressure in the chambers.

Further, the first piston (21) includes a hollow rectangular casing (210), one side of the casing (210) is connected with the first piston rod (22), and the other side is provided with a transverse air passage (213), the transverse air passage (213) communicates with the air inlet (211) at the top of the casing (210) inside the casing.

Further, a spiral flow channel (212) is also arranged in the housing (210), and the gas inlet and gas outlet of the spiral flow channel (212) are respectively connected with the air inlet (211) and the transverse air channel (213) Connected.

Further, the inner wall of the air intake duct (4) is vertically provided with distribution plates (41), and the distribution plates (41) are evenly arranged in plurality.

Further, the connection between the tail of the positive pressure chamber (2) and the air inlet (4) is set in a flared trumpet shape.

Further, a limit card table (23) is arranged at the tail of the positive pressure chamber (2).

Further, the second piston (31) is annular and the front end is set as a bell mouth (311), the inner wall of the annular ring is evenly provided with spokes (314) along the radial direction, and a center is provided at the intersection of the spokes (314). A cylinder (312); the end face of the cylinder (312) is connected with the second piston rod (32); an annular sealing cloth (313) is concentrically arranged on the cylinder (312).

Further, the end of the positive pressure chamber (2) is provided with a conducting tube (7) that communicates with the negative pressure chamber (3).

Further, the driving device (6) is an electric push rod or a motor.

Beneficial effects of the present invention:

1. The push-pull double-chamber structure is adopted to solve the friction between the fan blade and the air and the bottle mouth effect, which greatly reduces the noise, and at the same time has a compact structure and is easy to produce;

2. The positive pressure chamber and the negative pressure chamber are provided with a balance belt, which is conducive to maintaining the stable output of the pressure in the chamber;

3. The casing of the first piston is provided with a helical flow channel, and the inner wall of the intake channel is vertically provided with a dividing plate, which further improves the noise reduction effect;

4. Provide positive pressure inhalation, negative pressure exhalation to reduce resistance, fit the patient's breathing rhythm, and improve comfort.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic cross-sectional view of the first piston of the present invention.

FIG. 3 is a schematic cross-sectional view of A-A in FIG. 2 .

FIG. 4 is a schematic front view of the second piston of the present invention.

FIG. 5 is a schematic diagram of a right side view of the second piston of the present invention.

The characters in the figure are marked as follows: 1. Main body; 2. Positive pressure chamber; 3. Negative pressure chamber; 4. Air inlet; 5. Breathing tube; 6. Driving device; 7. Conducting tube; Belt; 21, first piston; 22, first piston rod; 23, card table; 201, annular groove; 210, housing; 211, air inlet; 212, spiral flow channel; 213, transverse air channel; 31, The second piston; 32, the second piston rod; 33, the exhalation safety valve; 311, the bell mouth; 312, the cylinder; 314, the spokes; 313, the sealing cloth; Main pipe; 52, two-position three-way solenoid valve; 61, push rod; 62, connecting seat.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention. .

As shown in FIG. 1-FIG. 5, the specific structure of the present invention is: a dual-chamber low-noise structure of a household ventilator, comprising a hollow main body 1, and the main body 1 is provided with a positive pressure chamber 2 and a negative pressure chamber 3 , the tail end of the positive pressure chamber 2 is provided with an air inlet 4 that runs through the main body 1 and is connected to the outside air; the positive pressure chamber 2 and the negative pressure chamber 3 are connected to the breathing tube 5 through the manifold 51; the positive pressure chamber 2 , The negative pressure chamber 3 and the main pipe 51 are selectively connected; the positive pressure chamber 2 is provided with a first piston 21, the negative pressure chamber 3 is provided with a second piston 31, the first piston 21 and the second piston 31 Simultaneously driven by the drive device 6 .

Preferably, the driving device 6 is a motor, and the front end of the motor is provided with a push rod 61, and the push rod 61 is connected with the connecting seat 62 connecting the first piston rod 22 and the second piston rod 32 at the same time; the push rod 61 adopts a screw rod , and the connecting seat 62 is matched with the push rod 61 .

Preferably, the driving device 6 may be an electric push rod; the electric push rod is connected to the connecting seat 62 that connects the first piston rod 22 and the second piston rod 32 at the same time.

Preferably, in this embodiment, the positive pressure chamber 2 , the negative pressure chamber 3 and the main pipe 51 are selectively connected to each other by using a two-position three-way solenoid valve 52 to control the conduction. A two-position three-way solenoid valve 52 connected to the control module is provided.

Preferably, the tail end of the positive pressure chamber 2 is provided with an annular balance belt 20 that can produce small deformation according to the change of the pressure in the chamber; the position where the balance belt 20 is arranged in the positive pressure chamber 2 is provided with an annular groove 201 inside, which is used for The space for expansion and deformation is provided and the amount of expansion is limited; the balance belt 20 is made of elastic material, which is parallel to the inner wall under normal pressure, shrinks under negative pressure, and expands under high pressure.

Preferably, the tail end of the negative pressure cavity 3 is provided with an annular balance belt 20 that can produce small deformation according to the change of the cavity pressure.

Preferably, the end of the positive pressure chamber 2 is provided with a conducting tube 7 that communicates with the negative pressure chamber 3, and the best position where the negative pressure chamber 3 passes through is located at 1/3-1/5 of the distance from the end; The gas flow in the chamber on the right side of the positive pressure chamber 2 while the chamber 3 balances the pressure.

Preferably, the first piston 21 includes a hollow rectangular casing 210, one side of the casing 210 is connected with the first piston rod 22, and the other side is provided with a transverse air passage 213, the transverse air passage 213 It communicates with the air inlet 211 at the top of the casing 210 inside the casing.

Preferably, the casing 210 is further provided with a spiral flow channel 212 , and the gas inlet and the gas outlet of the spiral flow channel 212 communicate with the air inlet 211 and the transverse air channel 213 respectively.

Preferably, the inner wall of the air inlet 4 is vertically provided with a plurality of dividing plates 41 , and the plurality of the dividing plates 41 are evenly arranged, so as to improve the noise reduction effect during intake.

Preferably, the connection between the tail of the positive pressure chamber 2 and the air inlet 4 is set in a flared trumpet shape.

Preferably, a limit card table 23 is provided at the tail of the positive pressure chamber 2 .

Preferably, the second piston 31 is annular and the front end is set as a bell mouth 311, the inner wall of the annular ring is evenly provided with spokes 314 along the radial direction, and a central cylinder 312 is arranged at the intersection of the spokes 314; It is connected with the second piston rod 32; an annular sealing cloth 313 is arranged concentrically on the cylinder 312.

Preferably, the front end of the negative pressure chamber 3 is provided with an exhalation safety valve 33 .

In specific use, its working principle is that the first piston 21 and the second piston 31 are driven by the driving mechanism 6 to move simultaneously, as shown in FIG. 1 , in the positive pressure chamber 2, when the first piston 21 moves to the left, the transition trachea 5 and the The positive pressure cavity 2 is turned on, and the gas in the cavity is compressed and discharged through the transition trachea 5 to guide the inhalation; during the movement, the balance belt 20 is conducive to maintaining a stable and even output of the pressure in the cavity; the first piston 21 moves to the right to recover When the transition trachea 5 is cut off from the positive pressure chamber 2; negative pressure is generated in the positive pressure chamber 2. When the first piston 21 moves to the right position, the dotted line indicates the state of moving to the right. With reference to Figures 2 and 3, the air inlet 211 Connected with the air inlet 4 , the external air enters the positive pressure chamber 2 through the air inlet 211 and the spiral flow channel 212 in the first piston 21 .

As shown in Figures 1, 4 and 5, in the negative pressure chamber 3, when the second piston 31 moves to the right, the transition air pipe 5 is connected to the negative pressure chamber 3. Due to the pressure difference, the sealing cloth 313 will tightly cover the second piston On the end face of 31, negative pressure is formed in the negative pressure cavity 3, and at the same time, the exhalation is guided by the internal pressure of the human body; when the second piston 31 moves to the conduit 7, the external air passes through the conduit 7 to supplement the pressure difference; When the piston 31 moves to the left, the transition trachea 5 is cut off from the negative pressure chamber 3, and the left cavity of the negative pressure chamber 3 forms high-pressure gas, and then the sealing cloth 313 is blown open to connect with the right side. The cavity on the right side of the pressure cavity 3 communicates with the positive pressure cavity 2, that is, communicates with the external air.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus.

Specific examples are used herein to illustrate the principles and implementations of the present invention, and the descriptions of the above examples are only used to help understand the method and the core idea of the present invention. The above are only the preferred embodiments of the present invention. It should be pointed out that due to the limited expression of words, there are objectively unlimited specific structures. For those of ordinary skill in the art, without departing from the principles of the present invention However, some improvements, modifications or changes can also be made, and the above-mentioned technical features can also be combined in an appropriate manner; these improvements, modifications, or combinations, or the concept and technical solutions of the invention are directly applied to other occasions without improvement. should be regarded as the protection scope of the present invention.

Claims (6)

1. A dual-chamber low-noise structure for a household ventilator, characterized by comprising a hollow body (1), wherein a positive pressure chamber (2) and a negative pressure chamber (3) are provided in the body (1), so that The tail end of the positive pressure chamber (2) is provided with an air inlet (4) that runs through the main body (1) and is connected to the outside air; the positive pressure chamber (2) and the negative pressure chamber (3) communicate with the breathing through the main pipe (51). The pipe (5) is connected; the positive pressure chamber (2), the negative pressure chamber (3) and the main pipe (51) are electrically connected to one another; the positive pressure chamber (2) is provided with a first piston (21), the negative pressure A second piston (31) is arranged in the pressure chamber (3), and the first piston (21) and the second piston (31) are simultaneously driven by the driving device (6); The tail end of the positive pressure chamber (2) is provided with an annular balance belt (20) that can be deformed according to changes in the pressure in the chamber; an annular groove ( 201); The tail end of the negative pressure chamber (3) is provided with an annular balance belt (20) that can be deformed according to changes in the chamber pressure; The first piston (21) includes a hollow rectangular casing (210), one side of the casing (210) is connected with the first piston rod (22), and the other side is provided with a transverse air passage (213) , the transverse air passage (213) communicates with the air inlet (211) at the top of the casing (210) inside the casing (210); The casing (210) is further provided with a spiral flow channel (212), and the gas inlet and the gas outlet of the spiral flow channel (212) communicate with the air inlet (211) and the transverse air channel (213) respectively. 2 . The dual-chamber low-noise structure of a household ventilator according to claim 1 , wherein the end of the positive pressure chamber ( 2 ) is provided with a conducting tube ( 7). 3 . The dual-chamber low-noise structure of a household ventilator according to claim 1 , wherein a dividing plate ( 41 ) is vertically arranged on the inner wall of the air inlet ( 4 ), and the dividing plate ( 41 ) For evenly set multiples. 4. The dual-chamber low-noise structure of a household ventilator according to claim 1, characterized in that the connection between the tail of the positive pressure chamber (2) and the air inlet (4) is set to be flared Trumpet. 5 . The dual-chamber low-noise structure of a household ventilator according to claim 1 , characterized in that a limit card table ( 23 ) is arranged at the tail of the positive pressure chamber ( 2 ). 6 . 6. The dual-chamber low-noise structure of a household ventilator according to any one of claims 1-5, wherein the second piston (31) is annular and the front end is set as a bell mouth ( 311), the inner wall of the ring is evenly provided with spokes (314) along the radial direction, and the center of the intersection of the spokes (314) is provided with a cylinder (312); the end face of the cylinder (312) is connected to the second piston rod; the cylinder (312) ) is concentrically provided with an annular sealing cloth (313).