Easy open check valve with rectifying anti-vortex function

Abstract

The utility model relates to an easy -open check valve with rectification anti -vortex function belongs to check valve technical field, it includes check valve shell, check valve shell includes first shell and second shell, first shell is connected with exhaust pipe, second shell is connected with public flue, the inside of first shell is equipped with rectification nozzle, the inside of first shell or second shell is installed with valve, the inside wall of second shell is equipped with a group of V type flow guide block, the utility model discloses the valve of facing double -open type, utilizes the characteristic that the through -flow area is not blocked when valve opening, can effectively reduce the resistance when the flue gas is discharged, utilizes the speed -up effect of taper nozzle, makes the high -speed jet in check valve form simultaneously to the bionic protrusion also has the effect of reducing resistance, reducing trailing vortex, through setting up V type flow guide block with good fluid mechanics characteristics, reduces the viscous resistance of the flow of the discharged flue gas, avoids the indoor flow of the back -inflating flue gas.

Description

Technical Field

[0001] This invention belongs to the field of check valve technology, specifically relating to an easy-open check valve with rectification and anti-vortex function. Background Technology

[0002] Currently, 68% of urban residential buildings in my country are high-rise buildings. Backflow of cooking fumes from public exhaust ducts and difficulties in ventilation for lower-floor residents are significant issues affecting residents' quality of life and health. While centralized exhaust systems are commonly used in high-rise residential buildings, effectively saving space and reducing low-altitude air pollution, the fumes can flow back into residents' homes, causing a series of problems that severely degrade indoor air quality, such as cross-contamination of odors and backflow of cooking fumes. Kitchen fumes are a major indoor pollutant; their accumulation in residences can cause respiratory illnesses, necessitating effective methods to prevent them from entering indoor spaces.

[0003] High-rise residential buildings utilize shared flues for centralized smoke extraction. Lower floors not only face difficulties in smoke extraction due to the long exhaust path and high resistance along the way, but also experience the smell of cooking fumes coming from other apartments even when not cooking. During peak cooking times, the higher the usage rate of range hoods, the lower the smoke extraction volume for lower-floor residents, making smoke removal even more difficult. In hot summers, the small temperature difference between the inside and outside of the flue promotes downward flow of fumes, exacerbating the backflow problem. To prevent fumes from entering the house through the shared flue, residents currently commonly install backflow preventers on the branch pipes of the flue. While these preventers offer some relief for backflow, several problems remain:

[0004] 1. In the existing technology, check valves used to solve the problem of backflow of oil fumes generally use gravity to open and close. When the exhaust oil fumes and backflow oil fumes collide, this opening and closing method is difficult to open, which makes the exhaust oil fumes generate greater resistance and greatly increases the burden on the range hood.

[0005] 2. Existing check valves use reverse double-opening plastic valve plates. This type of valve has a valve plate fixed shaft in the center of the flow channel. When the high-speed exhaust oil fume flows out of the check valve through the valve plates to both sides, it is blocked by the fixed shaft. At the same time, a tail vortex is generated at the tail edge of the valve plate. Both of these factors cause a large amount of aerodynamic losses in the flow field, and the valve plate vibration also generates noise. Oil droplets in the flue gas easily adhere to the fixed shaft and valve plate, causing problems such as valve plate adhesion and difficulty in opening over time, which puts a lot of pressure on the exhaust.

[0006] 3. The above-mentioned reverse double-opening valve plate will guide the flue gas to be injected towards the flue wall when it is opened in the reverse direction, and the flow along the flue wall will increase the flow resistance. Summary of the Invention

[0007] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide an easy-open check valve with rectification and anti-vortex function, which can effectively block the backflow of cooking fumes flowing along the wall into the residence.

[0008] The present invention provides the following technical solution: an easy-open check valve with rectification and anti-vortex function, including a check valve housing, the check valve housing including a first housing and a second housing, the first housing being connected to a flue gas hose, the second housing being connected to a common flue, the first housing having a rectification nozzle inside, a valve being installed inside the first housing or the second housing, and a set of V-shaped guide blocks being provided on the inner side wall of the second housing.

[0009] Furthermore, a group of the V-shaped guide blocks are arranged in a ring along the inner wall of the second shell, and the outer wall of the V-shaped guide blocks has a streamlined structure along the direction of flue gas flow. The end face of the V-shaped guide block on the side of the backflow direction of the oil fume is a concave structure to increase the resistance of the backflowing flue gas into the residence and induce the flue gas backflowing into the residence along the wall to generate a backflow.

[0010] Experiments have shown that the resistance experienced by an object flowing through the same cross-section in the same fluid at the same inflow velocity is not the same. When a viscous fluid flows over an object, the resistance it experiences consists of two parts: frictional resistance and form drag. The generation of form drag is closely related to boundary layer separation.

[0011] The viscous drag of a flowing object refers to the sum of the frictional drag and pressure drag experienced by the fluid on the object's surface. Experimental analysis shows that the drag is directly proportional to the product of the dynamic head of the incoming flow and the cross-sectional area A perpendicular to the direction of the flow, i.e.

[0012]

[0013] Form resistance (pressure drag)

[0014] .

[0015] Furthermore, the rectifying nozzle has a tapered structure, with a biomimetic protrusion at its end.

[0016] Furthermore, the valve includes a valve body, on which a first valve and a second valve are provided, and the first valve and the second valve are configured together to form an opposing double-opening valve structure.

[0017] Furthermore, the first valve and the second valve are hinged to the valve body, and a torsion spring is provided between the valve and the valve body.

[0018] Furthermore, the torsion springs at the two valves have different torque coefficients. The valve with the larger torsion spring torque coefficient has a cylindrical rubber strip, while the valve with the smaller torsion spring torque coefficient has a rubber sheet that matches the cylindrical rubber strip. The width of the rubber sheet is greater than the diameter of the cylindrical rubber strip.

[0019] Furthermore, the second housing is provided with a magnetic block for attracting the valve.

[0020] Furthermore, the end of the rectifier nozzle is provided with an on / off pressure sensing element for detecting the flow of flue gas and controlling the current of the magnetic block.

[0021] By employing the above-described technology, the beneficial effects of the present invention compared to the prior art are as follows:

[0022] 1) This invention uses a counter-opening double valve, which takes advantage of the fact that there is no obstruction on the flow surface when the valve is open, thus effectively reducing the resistance when flue gas is discharged.

[0023] 2) In this invention, the speed-increasing effect of the tapered nozzle is used to make the flue gas form a high-speed jet in the check valve, and the biomimetic protrusions also have the effect of reducing resistance and reducing tail vortex.

[0024] 3) In this invention, by setting a V-shaped guide block with good hydrodynamic properties, the streamlined design reduces the boundary layer thickness of the exhaust gas in the flue and reduces the viscous resistance of the exhaust gas flow. At the same time, the concave surface along the direction of backflow of oil fumes increases the flow resistance, thereby achieving the effect of disrupting the flue gas flow field backflowing into the room. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall exploded structure of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the entire invention;

[0027] Figure 3 Figure (a) shows the front view of the V-shaped flow guide block structure, Figure (b) shows the side view, and Figure (c) shows the three-dimensional structure.

[0028] Figure 4 This is a schematic diagram of the airflow at the V-shaped guide block of the present invention;

[0029] Figure 5 This is a schematic diagram of the valve opening structure of the present invention;

[0030] Figure 6 This is a partially enlarged structural diagram of the valve on the side with a larger torsion spring torque coefficient according to the present invention;

[0031] Figure 7This is a partially enlarged structural diagram of the valve on the side with the smaller torsion coefficient of the torsion spring according to the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] Conversely, this invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the invention as defined in the claims. Furthermore, to provide a better understanding of the invention, certain specific details are described in detail below. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0034] Please see Figure 1-6 An easy-opening check valve with rectification and anti-vortex function is installed at the connection between the exhaust hose of a range hood and the branch pipe of a common flue. It includes a check valve housing, which includes a first housing 1 and a second housing 6. The first housing 1 and the second housing 6 are snap-fitted together. The first housing 1 is connected to the exhaust hose and has a hose fixing interface to achieve a better sealing effect. The second housing 6 is connected to the common flue. A rectification nozzle 2 is installed inside the first housing 1. A valve 4 is installed inside the first housing 1 at the connection with the second housing 6. A set of V-shaped guide blocks 5 and magnetic blocks are installed on the inner side wall of the second housing 6.

[0035] Specifically, the rectifier nozzle 2 has a tapered structure, and a pressure-sensing element is provided at the end of the nozzle to sense whether there is airflow passing through the nozzle. It detects the flow of flue gas and controls the current on and off of the magnetic block. A set of biomimetic protrusions 3 are provided on both sides of the end. The biomimetic protrusions 3 are in the shape of the front edge protrusion of the pectoral fin. Utilizing its good hydrodynamic properties, it can reduce resistance and reduce wake vortex.

[0036] Specifically, valve 4 includes a valve body 401, a first valve 402, and a second valve 403. The valve body 401 is disc-shaped with a through hole in its center. The first valve 402 and the second valve 403 are hinged at the through hole. A torsion spring is installed between the valve and the valve body 401. The two valves are arranged in a counter-rotating double-opening valve structure. A magnetic block is used to attract the valve in the open state. Valve 4 adopts a torsion spring opening and closing mechanism. When no smoke is discharged, it remains closed under the action of the torsion spring force. When the range hood in the house starts working, the exhaust smoke is accelerated after passing through the rectifier nozzle, which can easily blow open valve 4. It works with the magnetic block to achieve the easy-open function.

[0037] in:

[0038] The torsion springs at the two valves have different torque coefficients. The valve with the larger torsion spring torque coefficient is provided with a cylindrical rubber strip 404, and the valve with the smaller torsion spring torque coefficient is provided with a rubber sheet 405 that cooperates with the cylindrical rubber strip. The width of the rubber sheet 405 is greater than the diameter of the cylindrical rubber strip 404. When the valve is closed, the cylindrical rubber strip 404 and the rubber sheet 405 are tightly fitted together.

[0039] Specifically, a set of V-shaped guide blocks 5 are spaced along the inner wall of the second outer shell 6, arranged in a ring. The outer wall of the V-shaped guide blocks 5 has a streamlined structure along the direction of flue gas flow. The end face of the V-shaped guide blocks 5 on the side of the backflow direction of the oil fume is concave to increase the resistance of the backflowing flue gas into the residence and induce the flue gas backflowing into the residence along the wall to generate a backflow.

[0040] Specifically, when the exhaust gas from the range hood flows through the rectifier nozzle 2, it triggers the pressure-sensing element. The pressure-sensing element detects the flow of exhaust gas and controls the magnetic block to be energized, thus generating magnetism. When the exhaust gas opens the valve 4, the magnetic block attracts and fixes the corresponding valve, preventing it from closing under external pressure during exhaust and thus avoiding exhaust difficulties. Both the pressure-sensing element and the magnetic block are powered by batteries.

[0041] The working process of the device in this embodiment is as follows:

[0042] When the exhaust gas from the range hood flows through the rectifier nozzle 2, it triggers the pressure sensing element. When the pressure sensing element detects the flow of exhaust gas, it controls the magnetic block to be energized, thereby generating magnetism. The first valve 402 and the second valve 403 in valve 4 open sequentially. The magnetic block attracts and fixes the corresponding valves, preventing them from closing under external pressure during the exhaust process, thus avoiding exhaust difficulties. The exhaust gas flows out along the outer wall of the V-shaped guide block 5. When the backflowing exhaust gas encounters the concave surface of the V-shaped guide block 5, it forms resistance and induces the backflowing exhaust gas along the wall into the household to generate a backflow. When the exhaust gas is exhausted, the pressure sensing element no longer detects the flow of exhaust gas and controls the magnetic block to be de-energized. The first valve 402 and the second valve 403 close sequentially.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An easy-open check valve with rectification and anti-vortex function, characterized in that: Includes a check valve housing, the check valve housing includes a first housing (1) and a second housing (6), the first housing (1) is connected to the exhaust hose, the second housing (6) is connected to the common flue, the first housing (1) is provided with a flow-rectifying nozzle (2), the first housing (1) or the second housing (6) is provided with a valve (4), and the inner side wall of the second housing (6) is provided with a set of V-shaped flow guide blocks (5). A set of V-shaped guide blocks (5) are arranged in a ring along the inner sidewall of the second outer shell (6). The outer sidewall of the V-shaped guide blocks (5) has a streamlined structure along the direction of flue gas flow. The end face of the V-shaped guide blocks (5) on the side of the direction of backflow of oil fume is a concave structure to increase the resistance of backflow of flue gas into the residence and induce the backflow of flue gas into the residence along the wall to generate a backflow. The rectifier nozzle (2) has a tapered structure, and a set of biomimetic protrusions (3) are provided at the end of its end. The torsion springs at the two valves have different torsion coefficients. The valve with the larger torsion spring torsion coefficient is provided with a cylindrical rubber strip (404), and the valve with the smaller torsion spring torsion coefficient is provided with a rubber sheet (405) that cooperates with the cylindrical rubber strip. The width of the rubber sheet (405) is greater than the diameter of the cylindrical rubber strip (404). The valve (4) includes a valve body (401), on which a first valve (402) and a second valve (403) are provided. The first valve (402) and the second valve (403) are combined to form a double-opening valve structure. The first valve (402) and the second valve (403) are hinged to the valve body (401), and a torsion spring is provided between the valve and the valve body (401).

2. The easy-open check valve with rectification and anti-vortex function according to claim 1, characterized in that... The second outer shell (6) is provided with a magnetic block for adsorbing the valve.

3. The easy-open check valve with rectification and anti-vortex function according to claim 2, characterized in that... The end of the rectifier nozzle (2) is provided with a pressure sensing element for detecting the flow of flue gas and controlling the current of the magnetic block.

Images