Backflow smoke oil and smoke energy recovery and utilization device

Abstract

The present invention provides a device for recovering and utilizing the energy of backflowing oil and smoke, belonging to the technical field of range hoods. The device comprises a range hood body, an external exhaust duct, a connecting duct, and a common duct, arranged sequentially from the inside out. A flue check valve is provided at the connection between the connecting duct and the external exhaust duct. An energy recovery mechanism is provided on the side of the connecting duct close to the common flue. A self-cleaning mechanism for cleaning the flue check valve is provided on the side of the connecting duct close to the external exhaust duct. When smoke flows back from the common flue into the connecting flue, the energy recovery mechanism recovers the smoke energy. The energy recovery mechanism can absorb and utilize the smoke energy when the smoke flows back into the connecting flue, and can simultaneously consume the kinetic energy of the smoke to reduce the amount of oil in the smoke adhering to the flue check valve. The self-cleaning mechanism can clean the flue check valve when the smoke flows back, achieving dual cleaning of oil stains on the flue check valve and oil smoke entering the connecting flue.

Description

Technical Field

[0001] The invention belongs to the technical field of range hoods and relates to a device for recovering and utilizing the energy of backflow oil and smoke. Background Art

[0002] Public flues are the most common exhaust system in modern residences. Because they rely on the mechanical propulsion of the range hood to propel fumes upward, any resistance slows them down, causing the air pressure inside the flue to exceed that outside, hindering fume exhaust and even causing fume backflow. Existing range hoods typically use check valves to prevent backflow. However, over time, grease builds up on the valve's surface, preventing it from opening properly and hindering smoke discharge. Furthermore, the backflowing smoke itself possesses a certain amount of thermal and kinetic energy, but existing technologies lack mechanisms for recovering this energy. Therefore, a device that can utilize the energy of the backflowing smoke and self-clean the check valve is needed.

[0003] For example, a Chinese patent discloses an absorption tower and its application for preventing flue gas backflow [application number: 201410095210.3], which includes an absorption tower body, a slurry storage section, an absorbent circulation pipeline, an absorption tower reflux pipeline interface, a flue gas inlet and a flue gas outlet. An absorption tower slurry manifold device is arranged outside the absorption tower body and connected to the slurry storage section. The absorption tower slurry manifold device includes a manifold device body, a reflux slurry pipeline interface, a vent and a slurry outlet pipeline interface. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for recycling the energy of backflow smoke oil and smoke in order to solve the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for recovering and utilizing energy from backflowing oil and smoke comprises a range hood body, an external smoke exhaust duct, a connecting flue and a common flue, which are arranged in sequence from the inside to the outside. A flue check valve is provided at the connection between the connecting flue and the external smoke exhaust duct. An energy recovery mechanism is provided on the side of the connecting flue close to the common flue. A self-cleaning mechanism for cleaning the flue check valve is provided on the side of the connecting flue close to the external smoke exhaust duct. When smoke flows back from the common flue into the connecting flue, the energy recovery mechanism recovers smoke energy.

[0007] In the above-mentioned backflow smoke energy recovery and utilization device, the energy recovery mechanism includes an axial flow generator with propeller-type power generation blades.

[0008] In the above-mentioned backflow smoke oil and smoke energy recovery and utilization device, a gradually expanding pipe is provided at the connecting flue near the common flue, and the cross-sectional area of ​​the gradually expanding pipe gradually increases from the side close to the common flue to the side close to the connecting flue, and the propeller-type power generation blades are arranged at the connection between the gradually expanding pipe and the connecting flue.

[0009] In the above-mentioned backflow smoke oil and smoke energy recovery and utilization device, the propeller-type power generation blades are fixed in the connecting flue by bolts, and the size of the propeller-type power generation blades is adapted to the size of the diffuser tube close to the connecting flue.

[0010] In the above-mentioned backflow smoke and oil smoke energy recovery and utilization device, the self-cleaning mechanism includes a spray assembly, which is arranged at the top of the connecting flue near the flue check valve. When the smoke is discharged from the range hood body to the public flue, the spray assembly is in a dormant state. When the smoke flows back from the public flue into the connecting flue, the spray assembly starts to work, and the smoke can blow the cleaning water sprayed by the spray assembly toward the flue check valve.

[0011] In the above-mentioned backflow smoke oil and smoke energy recovery and utilization device, a sewage pipe is provided at the bottom of the connecting flue near the flue check valve.

[0012] In the above-mentioned backflow smoke oil and smoke energy recovery and utilization device, an inclined sewage slope is provided on the lower side of the flue check valve, and the bottom of the sewage slope is connected to the sewage pipe inlet.

[0013] In the above-mentioned backflow oil and smoke energy recovery and utilization device, a range hood check valve is further provided at the connection between the external exhaust duct and the range hood body.

[0014] In the above-mentioned backflow smoke and oil smoke energy recovery and utilization device, the axial flow generator is an integrated motor generator. When the smoke is discharged from the range hood body to the public flue, the integrated motor generator acts as a motor to drive the propeller-type generator blades to rotate and accelerate smoke exhaust.

[0015] The above-mentioned backflow smoke and oil smoke energy recovery and utilization device also includes a control module, which includes a microcontroller. The microcontroller is connected to the self-cleaning mechanism, the motor generator and the range hood body. When the range hood body is started, the microcontroller controls the motor generator to work and drives the propeller-type generator blades to rotate. When the smoke flows back into the connecting flue and drives the propeller-type generator blades to rotate in the opposite direction, the motor generator acts as a generator to generate electricity, and the microcontroller controls the self-cleaning mechanism to work.

[0016] Compared with the existing technology, the advantages of the present invention are:

[0017] 1. The energy recovery mechanism can absorb the flue gas energy for utilization when the flue gas flows back into the connecting flue, and can also consume the kinetic energy of the flue gas at the same time to reduce the adhesion of smoke oil in the flue gas to the flue check valve. Secondly, the self-cleaning mechanism can clean the flue check valve when the flue gas flows back, so as to achieve double cleaning of the oil stains on the flue check valve and the oil smoke entering the connecting flue.

[0018] 2. When the flue gas is discharged to the outside, the axial flow generator drives the propeller-type generator blades to rotate to accelerate the exhaust and improve the exhaust efficiency. When the flue gas flows back, the generator works. At this time, the propeller-type generator blades rotate under the action of the backflowing flue gas and need to overcome the resistance formed by the generator's power generation. The kinetic energy of the backflowing flue gas will be reduced to reduce the oil in the flue gas adhering to the flue check valve. At the same time, the backflowing flue gas can be used to generate electricity, making the range hood more energy-efficient.

[0019] 3. After the spray assembly sprays the cleaning water, it can use the last kinetic energy of the flue gas to blow the sprayed cleaning water toward the flue check valve to clean the flue check valve. Secondly, it can also use the waste heat of the flue gas to increase the temperature of the cleaning water, thereby improving the cleaning effect of the flue check valve.

[0020] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure provided by the present invention;

[0022] Figure 2 It is a schematic diagram of the structure connecting the flue;

[0023] Figure 3 It is a schematic diagram of the propeller-type power generation blades at work;

[0024] Figure 4 This is a structural diagram of the flue check valve during self-cleaning;

[0025] Figure 5 It is a structural diagram of the flue check valve;

[0026] Figure 6 This is a schematic diagram of the structure when the oil smoke is discharged;

[0027] Figure 7 It is the framework diagram of the control module.

[0028] In the figure, there are a flue check valve 1, a gradually expanding pipe 2, a spray assembly 3, a propeller-type power generation blade 4, a sewage pipe 5, a connecting flue 6, an external flue 7, a range hood check valve 8, a range hood body 9, a common flue 10, an energy recovery mechanism 101, a self-cleaning mechanism 102, a motor generator 104, a control module 105, and a microcontroller 106. DETAILED DESCRIPTION

[0029] like Figures 1-6 As shown, a device for recovering and utilizing energy of backflowing oil and smoke comprises a range hood body 9, an external smoke exhaust duct 7, a connecting flue 6 and a common flue 10 arranged in sequence from the inside to the outside, a flue check valve 1 is provided at the connection between the connecting flue 6 and the external smoke exhaust duct 7, an energy recovery mechanism 101 is provided on the side of the connecting flue 6 close to the common flue 10, and a self-cleaning mechanism 102 for cleaning the flue check valve 1 is provided on the side of the connecting flue 6 close to the external smoke exhaust duct 7. When the smoke flows back into the connecting flue 6 from the common flue 10, the energy recovery mechanism 101 recovers the smoke energy.

[0030] In the present invention, the energy recovery mechanism 101 can absorb the flue gas energy for utilization when the flue gas flows back into the connecting flue, and can simultaneously consume the kinetic energy of the flue gas to reduce the adhesion of smoke oil in the flue gas to the flue check valve. Secondly, the self-cleaning mechanism 102 can clean the flue check valve when the flue gas flows back, so as to achieve double cleaning of the oil stains on the flue check valve and the oil smoke entering the connecting flue.

[0031] Specifically, the energy recovery mechanism 101 includes an axial-flow generator with propeller-type generator blades 4. When smoke is discharged, the axial-flow generator drives the propeller-type generator blades 4 to rotate, accelerating smoke exhaust and improving exhaust efficiency. When smoke flows back, the generator operates. The propeller-type generator blades 4 rotate under the influence of the backflowing smoke, overcoming the resistance created by the generator's power generation. This reduces the kinetic energy of the backflowing smoke, thereby reducing the amount of smoke oil in the smoke that adheres to the flue check valve. The backflowing smoke can also be used to generate electricity, making the range hood more energy-efficient.

[0032] Those skilled in the art should understand that the present invention mentions propeller-type power generation blades many times, but this is only for the convenience of explanation. Propeller-type power generation blades can be used in various energy recovery devices including but not limited to axial flow generators.

[0033] Preferably, combined Figure 2 and Figure 3As shown, a diverging pipe 2 is provided near the common flue 10 in the connecting flue 6. The cross-sectional area of ​​the diverging pipe 2 gradually increases from the side close to the common flue 10 to the side close to the connecting flue 6. The propeller-type power generation blades 4 are provided at the connection between the diverging pipe 2 and the connecting flue 6. The provision of the diverging pipe can reduce the velocity of the backflowing flue gas by a first stage when the flue gas flows back.

[0034] Preferably, the propeller-type power generation blades 4 are fixed to the connecting flue 6 by bolts, and the size of the propeller-type power generation blades 4 matches the size of the side of the diverging tube 2 near the connecting flue 6. The similar size of the propeller-type power generation blades 4 and the size of the tube opening of the diverging tube 2 can improve the energy recovery effect of the propeller-type power generation blades 4.

[0035] Specifically, combined Figure 4 As shown, the self-cleaning mechanism 102 includes a spray assembly 3, which is arranged at the top of the connecting flue 6 near the flue check valve 1. When the flue gas is discharged from the range hood body 9 to the public flue 10, the spray assembly 3 is in a dormant state. When the flue gas flows back from the public flue 10 into the connecting flue 6, the spray assembly 3 starts to work, and the flue gas can blow the cleaning water sprayed by the spray assembly 3 toward the flue check valve 1.

[0036] After the spray assembly 3 sprays the cleaning water, the spray assembly 3 can use the last kinetic energy of the flue gas to blow the sprayed cleaning water toward the flue check valve 1 to clean the flue check valve. Secondly, it can also use the waste heat of the flue gas to increase the temperature of the cleaning water, thereby improving the cleaning effect of the flue check valve.

[0037] Preferably, a sewage pipe 5 is provided at the bottom of the connecting flue 6 near the flue check valve 1; an inclined sewage slope is provided below the flue check valve 1, the bottom of which is connected to the inlet of the sewage pipe 5. The sewage slope provided below the flue check valve 1 allows sewage to be automatically discharged into the sewage pipe by gravity.

[0038] Preferably, a range hood check valve 8 is further provided at the connection between the external exhaust duct 7 and the range hood body 9 .

[0039] Preferably, the axial-flow generator is an integrated motor-generator 104. When smoke is discharged from the range hood body 9 into the common flue 10, the integrated motor-generator 104 acts as a motor to drive the propeller-type generator blades 4 to rotate, accelerating smoke exhaust. In this embodiment, the integrated motor-generator 104 is selected as the energy recovery mechanism. Its advantage is that it can generate electricity during smoke backflow and actively drive the propeller-type generator blades 4 to rotate to accelerate smoke exhaust when the smoke is discharged externally.

[0040] Preferably, combined Figure 7As shown, it also includes a control module 105, which includes a microcontroller 106. The microcontroller 106 is connected to the self-cleaning mechanism 102, the motor generator 104 and the range hood body 9. When the range hood body 9 is started, the microcontroller 106 controls the motor generator 104 to work and drives the propeller-type power generation blades 4 to rotate. When the smoke flows back into the connecting flue 6 and drives the propeller-type power generation blades 4 to rotate in the opposite direction, the motor generator 104 acts as a generator to generate electricity, and the microcontroller 106 controls the self-cleaning mechanism 102 to work.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0042] Although this article uses the flue check valve 1, diverging pipe 2, spray assembly 3, propeller-type power generation blade 4, sewage pipe 5, connecting flue 6, external flue 7, range hood check valve 8, range hood body 9, public flue 10, energy recovery mechanism 101, self-cleaning mechanism 102, motor generator 104, control module 105, microcontroller 106, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A device for recovering and utilizing the energy of backflow oil smoke, comprising a range hood body (9), an external smoke exhaust duct (7), a connecting smoke duct (6) and a common smoke duct (10) arranged in sequence from the inside to the outside, characterized in that: A flue check valve (1) is provided at the connection between the connecting flue (6) and the external flue (7); an energy recovery mechanism (101) is provided on the side of the connecting flue (6) close to the public flue (10); a self-cleaning mechanism (102) for cleaning the flue check valve (1) is provided on the side of the connecting flue (6) close to the external flue (7); when flue gas flows back from the public flue (10) into the connecting flue (6), the energy recovery mechanism (101) recovers flue gas energy; the energy recovery mechanism (101) comprises a screw An axial flow generator with propeller-type power generation blades (4); the self-cleaning mechanism (102) includes a spray assembly (3), which is arranged at the top of the connecting flue (6) near the flue check valve (1). When the smoke is discharged from the range hood body (9) to the public flue (10), the spray assembly (3) is in a dormant state. When the smoke flows back from the public flue (10) into the connecting flue (6), the spray assembly (3) starts to work, and the smoke can blow the cleaning water sprayed by the spray assembly (3) toward the flue check valve (1).

2. The device for recycling energy of backflow smoke oil according to claim 1, characterized in that: The connecting flue (6) is provided with a gradually expanding pipe (2) near the common flue (10), and the cross-sectional area of ​​the gradually expanding pipe (2) gradually increases from the side close to the common flue (10) to the side close to the connecting flue (6). The propeller-type power generation blades (4) are provided at the connection between the gradually expanding pipe (2) and the connecting flue (6).

3. The device for recycling energy of backflow smoke oil according to claim 2, characterized in that: The propeller-type power generation blade (4) is fixed in the connecting flue (6) by means of bolts, and the size of the propeller-type power generation blade (4) matches the size of the side of the diverging tube (2) close to the connecting flue (6).

4. The device for recycling energy of backflow smoke oil according to claim 1, It is characterized by: A sewage pipe (5) is provided at the bottom of the connecting flue (6) near the flue check valve (1).

5. The device for recycling energy of backflow smoke oil according to claim 4, characterized in that: The lower side of the flue check valve (1) is provided with an inclined sewage slope, and the bottom of the sewage slope is connected to the inlet of the sewage pipe (5).

6. The device for recycling energy of backflow smoke oil according to any one of claims 1 to 3, characterized in that: A range hood check valve (8) is also provided at the connection between the external exhaust duct (7) and the range hood body (9).

7. The device for recycling energy of backflow smoke oil according to any one of claims 1 to 3, characterized in that: The axial flow generator is a motor-generator integrated machine (104). When smoke is discharged from the range hood body (9) to the public flue (10), the motor-generator integrated machine (104) acts as a motor to drive the propeller-type generator blades (4) to rotate and accelerate smoke exhaust.

8. The device for recycling energy of backflow smoke oil according to claim 7, characterized in that: The range hood (9) further comprises a control module (105), wherein the control module (105) comprises a microcontroller (106), and the microcontroller (106) is connected to the self-cleaning mechanism (102), the motor-generator (104) and the range hood body (9). When the range hood body (9) is started, the microcontroller (106) controls the motor-generator (104) to operate and drives the propeller-type power generation blades (4) to rotate. When smoke flows back into the connecting flue (6) and drives the propeller-type power generation blades (4) to rotate in the opposite direction, the motor-generator (104) acts as a generator to generate electricity, and the microcontroller (106) controls the self-cleaning mechanism (102) to operate.

Images