Kitchen system based on energy utilization of extractor hood

Abstract

The utility model relates to a kind of kitchen system based on energy utilization of range hood, comprising: range hood main body;Filter pipe, install at the air outlet of range hood main body, its inside is equipped with filter assembly;Heat guide pipe, connect with filter pipe, and extend to kitchen or the room area outside kitchen;Electric check valve, is located at the end outlet of heat guide pipe, and is communicated with public flue;Pressure sensor, integrated in electric check valve;Controller, with pressure sensor and electric check valve electric connection, and be configured as: when the pressure in heat guide pipe reaches first set pressure, electric check valve opens and gas is discharged into public flue;When the pressure in heat guide pipe is less than second set pressure, electric check valve is closed, so that the hot gas after filtering by filter pipe is saved in heat guide pipe.The advantage is that: the kitchen system can purify the flue gas sucked and discharged by range hood, and the purified hot air can be used in controllable circulation.

Description

Technical Field

[0001] This utility model relates to the field of kitchen system technology, and in particular to a kitchen system based on the energy utilization of a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Traditional range hoods directly exhaust the 40-80℃ fumes generated during cooking into a shared flue. In winter, this valuable heat, which could have been used to heat specific spaces (such as the kitchen or adjacent living room), is wasted, increasing indoor heating demand and causing secondary energy consumption. Furthermore, unpurified fumes (containing grease particles, aerosols, etc.) are directly discharged into the shared flue, eventually entering the atmosphere. This not only pollutes the air but can also cause blockages in the shared flue over time. On the other hand, existing systems are designed solely to "remove fumes" and lack a system for the safe and controllable circulation of purified hot air within the room, thus failing to actively raise the indoor temperature.

[0003] Therefore, the existing kitchen system still needs further improvement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a kitchen system based on the energy utilization of a range hood, which is in response to the current state of the technology. This kitchen system can purify the smoke drawn and exhausted by the range hood and realize the energy utilization of the purified hot air through controllable circulation.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a kitchen system based on the energy utilization of a range hood, comprising: a range hood body, which is equipped with a fan system inside for sucking up cooking fumes;

[0006] The filter tube is installed at the air outlet of the range hood body, and its interior contains a filter component for filtering the smoke.

[0007] A heat-conducting air duct, connected to the filter pipe, extends to the kitchen or a room area outside the kitchen, with the duct wall arranged close to the wall.

[0008] An electric check valve is located at the end outlet of the heat-conducting air duct and is connected to the common flue.

[0009] A pressure sensor, integrated into an electric check valve, is used to monitor the pressure inside the duct.

[0010] The controller, electrically connected to the pressure sensor and the electric check valve, is configured to:

[0011] When the pressure in the heat-conducting air duct reaches the first set pressure, the electric check valve opens and discharges the gas into the common flue; when the pressure in the heat-conducting air duct is less than the second set pressure, the electric check valve closes, so that the hot gas filtered by the filter tube is stored in the heat-conducting air duct.

[0012] To improve the filtering effect and ensure the cleanliness of the hot air flow after filtering, the filtering component includes a first filter element, a second filter element and a third filter element arranged in sequence along the air flow direction. The first filter element uses polypropylene PP cotton with a pore size of 1μm - 10μm, the second filter element uses compressed activated carbon with a pore size of 1μm - 10μm, and the third filter element uses polypropylene PP cotton with a pore size of 1μm - 5μm.

[0013] As an improvement, a ventilation hole is opened in a section of the heat-conducting air duct located in the kitchen or the room area outside the kitchen, and the heat-conducting air duct uses a heat-dissipating metal pipe fitting surface with adjustable pore size.

[0014] The above-mentioned "adjustable pore size" can be understood as that the pipe wall of the heat-conducting air duct has a pore size adjustment function, such as using an aluminum bellows with a rotatable hole plate or a stainless steel pipe with an electric air valve inside.

[0015] The above structural design of the heat-conducting air duct can release the hot air to the kitchen or adjacent rooms in a directional manner through the ventilation holes to achieve regional heating. Among them, the adjustable pore size design (such as a telescopic metal bellows or a valve) can flexibly control the heat dissipation intensity and improve the thermal comfort.

[0016] In order to realize the adjustment of the constant temperature range in each room and avoid excessive waste of the heat of the flue gas, as an improvement, it further includes a temperature sensor, which is arranged in the area where the kitchen or the room outside the kitchen is located, and is electrically connected to the electric check valve and the controller, so as to realize linkage control. When the ambient temperature is lower than the set threshold, the electric check valve is closed. When the temperature sensor detects that the ambient temperature is lower than the set threshold (such as 18°C), the controller closes the check valve to forcibly store the hot air, preferentially meet the heating demand, and improve the energy-saving efficiency.

[0017] Considering that the filtering component needs to be cleaned or replaced regularly, and the traditional fixed installation method is inconvenient for maintenance, an air outlet cover is also provided at the air outlet of the main body of the range hood, and the filter tube is connected to the air outlet cover in a detachable manner. The structural design of the detachable connection between the filter tube and the air outlet cover simplifies the cleaning / replacement process of the filtering component and reduces the maintenance cost.

[0018] As an improvement, a power generation module is also included. This module comprises a generator, a battery, and a fan blade assembly. The fan blade assembly is located inside the filter tube, downstream of the filter assembly along the flue gas flow direction, and rotates under the influence of the airflow within the filter tube. The shaft of the fan blade assembly passes through the wall of the filter tube and is connected to the rotor shaft of the generator via a shaft seal structure. The battery is electrically connected to the generator to store the electrical energy generated by the generator. The battery is also electrically connected to the electric check valve to supply power to the electric check valve. The fan blade assembly uses the filtered airflow to drive the generator to generate electricity, which is stored in the battery to power the electric check valve, achieving system energy self-sufficiency, reducing external dependence, and lowering grid energy consumption.

[0019] As an improvement, the filter tube extends vertically, and a grease collection box is also provided inside the filter tube for collecting oil. The grease collection box is located at the bottom of the filter assembly. The grease collection box catches the oil dripping from the filter assembly, preventing grease from adhering to the fan blades or generator, ensuring stable operation of the power generation module, and extending the equipment life.

[0020] Considering that there may be gaps between the rotating shaft and the filter tube wall, which may lead to oil fume leakage or external air infiltration, the shaft seal structure includes a sealing ring and a rotating shaft sleeve. The sealing ring is provided between the rotating shaft sleeve and the wall of the filter tube, and the shaft of the fan blade assembly passes through the rotating shaft sleeve and extends out of the filter tube.

[0021] As an improvement, it also includes an electric fan located in the kitchen or in a room outside the kitchen, the electric fan being electrically connected to a battery.

[0022] Compared with existing technologies, the advantages of this invention are as follows: This invention uses a heat-conducting duct that extends close to the wall into the indoor area, effectively guiding and storing the purified hot air within the duct. The duct wall is in close contact with the wall, allowing heat to radiate continuously and safely through the wall to the kitchen or adjacent rooms (such as the living room), significantly recovering and utilizing waste heat generated during cooking and directly increasing the indoor temperature. This is especially valuable in winter, reducing secondary energy consumption for indoor heating and achieving tiered energy utilization. The filter components within the duct purify the inhaled fumes, effectively removing pollutants such as grease particles and aerosols. This not only significantly reduces the concentration of grease pollutants discharged into the public flue, mitigating air pollution, but also avoids the blockage caused by long-term accumulation of grease in the public flue, improving the safety and lifespan of public facilities. In particular, through the coordinated operation of pressure sensors, electric check valves, and controllers, the system achieves intelligent switching and precise control of operating modes: When the pressure inside the duct is too high (reaching the first set pressure), indicating a large amount of fumes or the need for forced exhaust (such as during stir-frying), the controller instructs the electric check valve to open, safely venting the gas into the common flue, ensuring timely exhaust of fumes and preventing backflow or overpressure risks. When the pressure inside the duct decreases (below the second set pressure), the controller instructs the check valve to close, sealing the purified hot air within the heat-conducting duct, allowing its heat to be continuously and slowly released into the room through the duct wall, maximizing heat recovery efficiency. This pressure-based automatic control method, without user intervention, maximizes heat recovery time and efficiency while ensuring safe and unobstructed smoke exhaust, truly achieving "controllable recycling" of purified hot air indoors. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the kitchen system according to an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0027] Figures 1-2 This illustration shows a preferred embodiment of the kitchen system based on the energy utilization of a range hood according to the present invention. A kitchen system based on the energy utilization of a range hood includes a range hood body 1, a filter pipe 2 and a filter assembly 20 disposed within the filter, a heat-conducting air duct 3, an electric check valve 4, a power generation module 6, and a pressure sensor 41.

[0028] The main body 1 of the range hood is equipped with a fan system 10, which is generally a centrifugal fan, including a volute, an impeller inside the volute, and a motor for driving the impeller to rotate. The rotation of the impeller generates negative pressure to draw in cooking fumes. The main components and working principle of the range hood are existing technologies and will not be described in detail here.

[0029] The filter pipe 2 is installed at the air outlet of the range hood body 1, and its interior contains a filter assembly 20 for filtering the fumes. Specifically, an air outlet hood 11 is also provided at the air outlet of the range hood body 1, and the filter pipe 2 is detachably connected to the air outlet hood 11. To improve the filtration effect and ensure the cleanliness of the filtered hot airflow, the filter assembly 20 includes a first filter element 21, a second filter element 22, and a third filter element 23 arranged sequentially along the airflow direction. The first stage is 1μm-10μm polypropylene PP cotton, used to adsorb oil fume particles and steam moisture; the second stage is 1μm-10μm compressed activated carbon rod, used to adsorb oil fume odors; and the third stage is 1μm-5μm polypropylene PP cotton, used to deeply adsorb oil fume particles and moisture. This achieves purification of oil fumes and grease, and clean gas, ensuring that the gas supplied to the generator 62 fan blades for operation and heating is clean, effectively preventing oil fumes and grease from adhering to mechanical parts and reducing their service life. In some embodiments, the filter tube 2 is circular with a quick-connect rod at the bottom, which is directly inserted into the claw of the air outlet shroud 11. A small steel plate on the claw secures the quick-connect rod of the filter tube 2. When disassembling, the quick-connect rod of the filter tube 2 can be pulled out by pressing the upper part of the claw, thereby removing the filter tube 2.

[0030] In some embodiments, the filter tube 2 extends vertically, and a grease collection box 24 for collecting oil is also provided inside the filter tube 2. The grease collection box 24 is located at the bottom of the filter assembly 20. The grease from the oil fumes flows into the collection tube through the groove and then into the collection box. The collection box has a box body and a box cover, and the box body and the box cover are sealed with a sealing ring. The collected grease can be reused for lubrication of mechanical parts, maintenance of flowers and plants, etc.

[0031] In this embodiment, the heat-conducting air duct 3 is connected to the filter pipe 2 and extends to the kitchen or a room outside the kitchen. The wall of the heat-conducting air duct 3 is arranged close to the wall. A section of the heat-conducting air duct 3 located inside or outside the kitchen has ventilation holes. The heat-conducting air duct 3 uses a heat-dissipating metal fitting with adjustable orifice diameter. The "adjustable orifice diameter" can be understood as the heat-conducting air duct 3 having an adjustable orifice diameter, such as using an aluminum corrugated pipe with a rotatable perforated plate or a stainless steel pipe with a built-in electric air valve. The structural design of the heat-conducting air duct 3 allows for the directional release of hot air to the kitchen or adjacent rooms through the ventilation holes, achieving district heating. The adjustable orifice diameter design (such as a telescopic metal corrugated pipe or valve) flexibly controls the heat dissipation intensity, improving thermal comfort.

[0032] An electric check valve 4 is located at the end outlet of the heat-conducting air duct 3. The check valve has a pressure sensor 41. When the pressure inside the duct reaches the first design pressure (e.g., the upper limit of 0.55 MPa), the valve cover of the check valve opens, allowing the fumes to be discharged into the common flue 8. When the pressure inside the duct falls below the second set pressure (reduced to below the lower limit of 0.50 MPa), the valve cover of the check valve closes, preventing the temperature inside the duct from leaking into the common flue. Instead, heat is supplied through the duct to the kitchen or living room area, raising the ambient temperature and thus providing heating to the area.

[0033] Temperature sensors 5 are installed in the kitchen or the room outside the kitchen. These temperature sensors 5 are electrically connected to the electric check valve 4 and the controller to achieve linkage control. When the ambient temperature is lower than the set threshold, the electric check valve 4 is closed.

[0034] The kitchen system utilizing the range hood's energy also includes a power generation module 6. The power generation module 6 comprises a generator 62, a battery 63, and a fan blade assembly 61. The fan blade assembly 61 is located inside the filter tube 2, downstream of the filter assembly 20 along the direction of smoke flow, and rotates under the influence of the airflow within the filter tube 2. The shaft of the fan blade assembly 61 passes through the wall of the filter tube 2 via a shaft seal structure 64 and is connected to the rotor shaft of the generator 62. The battery 63 is electrically connected to the generator 62 to store the electrical energy generated by the generator 62. The battery 63 is also electrically connected to an electric check valve 4 to supply power to the electric check valve 4. The shaft seal structure 64 includes a sealing ring and a rotating bushing. The sealing ring is located between the rotating bushing and the wall of the filter tube 2. The shaft of the fan blade assembly 61 passes through the rotating bushing and extends out of the filter tube 2. The shaft seal component is located in the housing of the purification tube and is an auxiliary component for sealing the shaft. It ensures that the shaft rotates through the housing of the purification tube while preventing smoke from leaking out through the perforations. The shaft seal housing and the purification pipe housing are sealed with a sealing ring, and the shaft core operates and is sealed through the inside of the shaft seal. The electric fan 7 is connected to the battery 63 via an interconnecting flexible cable and can be installed in the range hood body, in the kitchen area, or in the living room area.

[0035] When the range hood is turned on, the fan system 10 rotates, generating negative pressure in the cooking area to draw in cooking fumes, which are then exhausted through the exhaust hood 11. A removable filter tube 2 is installed on the upper part of the exhaust hood 11. The lower layer inside the filter tube 2 contains multi-stage filter media for adsorbing and purifying the cooking fumes. The flowing cooking fumes in the exhaust hood 11 have a pressure of 260Pa to 350Pa. As the gas flows, it drives the fan blades to rotate, which in turn drives the shaft to rotate. The shaft then drives the rotor shaft of the generator 62 to rotate. Relative motion occurs between the magnets on the rotor and the coils on the stator, cutting magnetic lines of force to generate an induced electromotive force, which in turn forms a current, thus converting mechanical energy into electrical energy. The converted electrical energy is stored in the battery 63 and used to power the electric fan 7 and the electric fireproof check valve. The main control board of the range hood has switches for the electric fan 7 and the electric fireproof check valve. When the kitchen temperature is high in summer, the fan switch can be turned on, and it can be turned off in winter. When the kitchen or living room temperature is low in winter, the electric fireproof check valve can be opened to provide heating and insulation, and it can be turned off in summer. In some embodiments, the fan blades of the generator 62 (fan blades inside the purification pipe) are composed of multiple blades, and the angle of the fan blades is preferably at a certain angle to facilitate the airflow impacting the fan blades to rotate and generate electricity. The fan blade angle can be selected from 20° to 45°.

[0036] This embodiment utilizes a heat-conducting duct 3 that extends close to the wall into the indoor area, effectively guiding and storing the purified hot air from the filter pipe 2 within the duct. The duct wall is in close contact with the wall, allowing heat to radiate continuously and safely through the wall to the kitchen or adjacent rooms (such as the living room), significantly recovering and utilizing waste heat generated during cooking and directly raising the indoor temperature. This is especially valuable in winter, reducing secondary energy consumption for indoor heating and achieving tiered energy utilization. The filter component 20 within the filter pipe 2 purifies the inhaled fumes, effectively removing pollutants such as grease particles and aerosols. This not only significantly reduces the concentration of grease pollutants discharged into the public flue, mitigating air pollution, but also avoids the potential blockage caused by long-term accumulation of grease in the public flue 8, improving the safety and lifespan of public facilities. In particular, through the coordinated operation of pressure sensor 41, electric check valve 4, and controller, intelligent switching and precise control of system operation modes are achieved: When the pressure inside the duct is too high (reaching the first set pressure), it indicates a large amount of oil fumes or the need for forced exhaust (such as stir-frying). The controller instructs the electric check valve 4 to open, safely venting the gas into the public flue, ensuring timely exhaust of oil fumes and preventing backflow or overpressure risks. When the pressure inside the duct decreases (below the second set pressure), the controller instructs the check valve to close, sealing and storing the purified hot air inside the heat-conducting duct 3, allowing its heat to be continuously and slowly released into the room through the duct wall, maximizing the efficiency of heat energy recovery. This pressure-based automatic control method, without user intervention, maximizes the heat recovery time and efficiency while ensuring safe and smooth exhaust, truly realizing the "controllable recycling" of purified hot air indoors.

Claims

1. A kitchen system based on the energy utilization of a range hood, characterized in that, include: The main body of the range hood (1) is equipped with a fan system (10) inside, which is used to draw in the oil fumes generated during cooking; The filter tube (2) is installed at the air outlet of the main body (1) of the range hood, and its interior is equipped with a filter assembly (20) for filtering the smoke. A heat-conducting air duct (3) is connected to the filter duct (2) and extends to the kitchen or a room outside the kitchen; An electric check valve (4) is located at the end outlet of the heat-conducting air duct (3) and is connected to the common flue. A pressure sensor (41) is integrated into an electric check valve (4) for monitoring the pressure inside the duct. The controller, electrically connected to the pressure sensor (41) and the electric check valve (4), is configured to: When the pressure inside the heat-conducting air duct (3) reaches the first set pressure, the electric check valve (4) opens and discharges the gas into the common flue; when the pressure inside the heat-conducting air duct (3) is less than the second set pressure, the electric check valve (4) closes, so that the hot gas filtered by the filter pipe (2) is stored in the heat-conducting air duct (3).

2. The kitchen system based on the energy utilization of a range hood according to claim 1, characterized in that: The filter assembly (20) includes a first filter element (21), a second filter element (22) and a third filter element (23) arranged sequentially along the airflow direction. The first filter element (21) is made of polypropylene PP cotton with a pore size of 1μm-10μm, the second filter element (22) is made of compressed activated carbon with a pore size of 1μm-10μm, and the third filter element (23) is made of polypropylene PP cotton with a pore size of 1μm-5μm.

3. The kitchen system based on the energy utilization of a range hood according to claim 1, characterized in that: The heat-conducting air duct (3) has a ventilation hole in a section located in the room area inside or outside the kitchen. The heat-conducting air duct (3) is made of heat-dissipating metal pipe with adjustable aperture.

4. The kitchen system based on the energy utilization of a range hood according to claim 1, characterized in that... Also includes: A temperature sensor (5) is located in the kitchen or a room outside the kitchen and is electrically connected to the electric check valve (4) and the controller to achieve linkage control. When the ambient temperature is lower than the set threshold, the electric check valve (4) is closed.

5. The kitchen system based on the energy utilization of a range hood according to claim 1, characterized in that: The main body (1) of the range hood is also provided with an air outlet hood (11), and the filter tube (2) is connected to the air outlet hood (11) in a detachable manner.

6. The kitchen system based on the energy utilization of a range hood according to any one of claims 1 to 5, characterized in that: It also includes a power generation module (6), which includes a generator (62), a storage battery (63), and a fan blade assembly (61). The fan blade assembly (61) is located inside the filter tube (2) and downstream of the filter assembly (20) along the flue gas flow direction. It can rotate under the influence of the airflow inside the filter tube (2). The shaft of the fan blade assembly (61) passes through the wall of the filter tube (2) through a shaft seal structure (64) and is connected to the rotor shaft of the generator (62). The storage battery (63) is electrically connected to the generator (62) and is used to store the electrical energy generated by the generator (62). The storage battery (63) is electrically connected to the electric check valve and supplies power to the electric check valve (4).

7. The kitchen system based on the energy utilization of a range hood according to claim 6, characterized in that: The filter tube (2) extends vertically, and a grease collection box (24) for collecting oil is provided inside the filter tube (2). The grease collection box (24) is located at the bottom of the filter assembly (20).

8. The kitchen system based on the energy utilization of a range hood according to claim 6, characterized in that: The shaft seal structure (64) includes a sealing ring and a rotating shaft sleeve. The sealing ring is provided between the rotating shaft sleeve and the wall of the filter tube (2). The shaft core of the fan blade assembly (61) passes through the rotating shaft sleeve and extends out of the filter tube (2).

9. The kitchen system based on the energy utilization of a range hood according to claim 6, characterized in that: It also includes an electric fan (7) located in the kitchen or in a room outside the kitchen, the electric fan (7) being electrically connected to a battery (63).

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