CN113294822B - Smoke absorbing effect detection method for range hood - Google Patents
Smoke absorbing effect detection method for range hood Download PDFInfo
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- CN113294822B CN113294822B CN202110628252.9A CN202110628252A CN113294822B CN 113294822 B CN113294822 B CN 113294822B CN 202110628252 A CN202110628252 A CN 202110628252A CN 113294822 B CN113294822 B CN 113294822B
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- range hood
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- frying pan
- oil
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- 239000000779 smoke Substances 0.000 title claims abstract description 77
- 230000000694 effects Effects 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 230000000391 smoking effect Effects 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 41
- 235000019198 oils Nutrition 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000003517 fume Substances 0.000 claims description 11
- 238000010411 cooking Methods 0.000 claims description 10
- 235000013305 food Nutrition 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 6
- 239000008158 vegetable oil Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 7
- 241000512259 Ascophyllum nodosum Species 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
Abstract
The invention discloses a smoke absorbing effect detection method of a range hood, which comprises the following steps: step A1: obtaining air performance data of the range hood and drawing an air quantity-static pressure curve, and an air quantity-power curve; step A2: mounting a range hood and a smoke tube of the range hood, wherein an air quantity adjusting valve is arranged on the smoke tube, the motor power of the range hood is adjusted by adjusting the valve opening of the air quantity adjusting valve according to the corresponding relation between the motor power of the range hood, the air quantity and the static pressure, and the smoking effect of the range hood is tested after the power point is in one-to-one correspondence with the power point on the air quantity-power curve; and obtaining smoking effect test results at different working points. The smoking effect of different working points can be measured, and all working states of the smoke machine are covered, so that the smoking effect is more fit with the actual experience of a user, and development work is better guided.
Description
Technical Field
The invention relates to the technical field of range hoods, in particular to a method for detecting the smoking effect of a range hood.
Background
The Chinese patent No. CN 109959521A discloses a smoke absorbing effect testing device and a smoke absorbing effect testing method for a range hood, which adopt a method of arranging a plurality of sampling points in a simulated kitchen to evaluate the overflow oil smoke amount of the range hood and compare the overflow oil smoke amounts of different range hoods. The method only adopts a multi-point test method to improve the measurement accuracy of the overflow oil smoke amount of the range hood at a certain working point.
The invention patent No. CN 112503598A discloses a smoke absorbing effect detecting device and method for a range hood, which adopts a smoke collecting box with an electrostatic resident pole piece and a negative ion generator to collect and detect the overflow smoke under three working conditions of large, medium and small air quantity of the range hood. The Chinese patent No. CN 112503599A discloses a smoke absorbing effect detecting device and method for a range hood, wherein a horn-shaped smoke collecting tube is used for collecting and detecting the overflow smoke under the working conditions of large, medium and small air quantity of the range hood. The smoke absorbing effect detection method of the range hood disclosed in the prior patent application only adopts different oil smoke collecting devices, so that the measuring precision of the overflow oil smoke amount of the range hood at three different gear working points is improved.
The actual use environment of the range hood is mainly divided into a low-rise building without a public flue and a high-rise residence with a public flue. The back pressure of the low-rise building is small, and the high-rise building is different from the range hood of the whole building in turn-on probability along with the floor change, so that the back pressure change is extremely large. The following table is used for actually measuring the back pressure change conditions of the range hood at different floors of a commodity building. When the smoking effect is tested, the smoking effect on the whole working curve needs to be measured.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the smoke exhaust effect detection method of the smoke exhaust ventilator, which is used for covering all working states of the smoke exhaust ventilator and is more fit with the actual experience of a user, so as to better guide development work.
In order to achieve the above purpose, the invention adopts the following technical scheme.
The smoke absorbing effect detection method of the range hood is characterized by comprising the following steps of: step A1: obtaining air performance data of the range hood and drawing an air quantity-static pressure curve, and an air quantity-power curve; step A2: mounting a range hood and a smoke tube of the range hood, wherein an air quantity adjusting valve is arranged on the smoke tube, the motor power of the range hood is adjusted by adjusting the valve opening of the air quantity adjusting valve according to the corresponding relation between the motor power of the range hood, the air quantity and the static pressure, and the smoking effect of the range hood is tested after the power point is in one-to-one correspondence with the power point on the air quantity-power curve; and obtaining smoking effect test results at different working points.
More preferably, the air volume control valve includes: the valve body with the passageway, with the rotatable blade pole of connecting of valve body, with the blade pole is connected and is arranged in the valve body adjusts the blade that passes through the valve body through the amount of wind, drives the pivoted actuating mechanism of blade pole.
More preferably, the driving mechanism is a handle connected to the blade bar, the handle includes a handle upper blade and a handle lower blade combined together, a handle spring provided on the handle upper blade and the handle lower blade, and a spring pin for fixing the handle spring.
More preferably, the driving mechanism is connected with a limiting mechanism, and the limiting mechanism comprises a flange fixedly arranged on the valve main body, a sleeve connected with the flange, and a limiting disc arranged on the sleeve and matched with the driving mechanism.
More preferably, the air volume control valve includes: a valve body having a passage, a mounting rod mounted in the valve body, a conical valve spool slidably disposed on the mounting rod; the mounting rod and the channel are coaxially arranged, and the opening of the channel is changed along with the back and forth movement of the conical valve core, so that the air quantity passing through the valve body is changed.
More preferably, the air performance data of the range hood is measured by a measuring method provided by national standard GBT 17713-2011.
More preferably, one end of the air quantity adjusting valve is detachably connected with a smoke pipe connector connected with the smoke pipe.
More preferably, the air quantity regulating valve is arranged at the tail end of the smoke tube and is fixed in the wall hole.
More preferably, the range hood is arranged in a simulated kitchen with good sealing performance, the range hood is hung right above the kitchen range table top according to the installation size in the specification, and the vertical distance between the lowest part of the range hood and the gas cooker is the minimum installation height of the mark in the specification.
More preferably, the oil absorption effect detection step of the range hood is as follows: step B1: starting the range hood and the lighting lamp, and enabling the range hood to operate for a period of time under the highest rotating speed gear; step B2: placing a frying pan on any stove head of the gas stove dual-stove, then starting the gas stove, observing the smoking effect of the single-side stove during quick frying, wherein the smoking effect comprises whether all the oil smoke in the frying pan can be sucked away, observing the flow direction and the area of the outwards-escaping oil smoke if the oil smoke is outwards-escaping, and recording videos; step B3: and B2, repeating the step with the other cooking range of the gas kitchen range double kitchen ranges.
More preferably, the stir-frying step includes: step B21: preparing food materials, and equally dividing the food materials into a plurality of parts; step B22: firstly, a large flame frying pan is used for heating to 200+/-10 ℃; step B23: pouring a first amount of vegetable oil into the frying pan, continuously heating the frying pan until the oil temperature in the frying pan is 290-310 ℃, immediately adding a part of food material, generating thick smoke by the frying pan, turning over by a turner until the oil temperature in the frying pan is increased to 290-310 ℃ again, adding a certain amount of water, generating the thick smoke again by the frying pan, and ending the first cooking cycle; step B24: adding a second amount of vegetable oil into the frying pan after the oil fume is weakened, continuously stir-frying until the oil temperature in the frying pan is 290-310 ℃, pouring a certain amount of water into the frying pan and stir-frying, generating thick fume again in the frying pan, stir-frying until the oil fume is weakened, adding a certain amount of water when the oil temperature in the frying pan is 290-310 ℃ again, generating thick fume again in the frying pan, and ending the second cooking cycle after the oil fume is weakened; the temperature of the frying pan and the oil temperature are measured by an infrared thermometer; the gas stove keeps a big fire state in the whole stir-frying process.
The invention has the beneficial effects that.
1. And measuring air performance data of the range hood, and controlling motor power of the range hood through the air quantity regulating valve, so that different back pressure states are simulated according to one-to-one correspondence between air quantity static pressure and motor power, smoking effects of different working points can be measured, all working states of the range hood are covered, the smoking effects are more fit with actual experience of users, and development work is better guided.
2. Through setting up the air quantity control valve of specific structure, can change the amount of wind through corresponding actuating mechanism (manual mechanism or electric mechanism), need not to change the picture peg in addition, air quantity control is swift and simple and convenient.
Drawings
Fig. 1 is a flowchart of a smoke exhaust effect detection method of a range hood.
Fig. 2 is a schematic diagram of a simulated kitchen structure of the method for detecting the smoke absorbing effect of the range hood.
Fig. 3 is an exploded view of the air quantity adjusting valve of the method for detecting the smoke suction effect of the range hood.
Fig. 4 is a side view of an air quantity adjusting valve of the smoke exhaust effect detection method of the range hood.
Fig. 5 is an exploded view showing another embodiment of an air quantity control valve of the method for detecting the smoke suction effect of a range hood according to the present invention.
Fig. 6 is a structural diagram of another embodiment of an air quantity adjusting valve of the smoke exhaust effect detection method of the smoke exhaust ventilator.
Reference numerals illustrate.
1: fume extractor, 2: smoke tube, 3: cooking bench, 4: an air quantity adjusting valve.
41: valve body, 42: smoke tube connector, 43: blade, 44: blade lever, 45: flange, 46: sleeve, 47: limit plate, 48: handle lower leaf, 49: handle spring, 410: spring pin, 411: handle upper leaf, 412: lock nut, 413: first locking bolt, 414: second lock bolt, 415: mounting bar, 416: a conical valve core.
Detailed Description
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the invention, "at least" means one or more, unless clearly specifically defined otherwise.
In the present invention, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "below," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply representing the first feature as having a higher level than the second feature. The first feature being "above," "below," and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or simply indicating that the first feature is level below the second feature.
The following description of the specific embodiments of the present invention is further provided with reference to the accompanying drawings, so that the technical scheme and the beneficial effects of the present invention are more clear and definite. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the invention and are not to be construed as limiting the invention.
As shown in fig. 1, a method for detecting smoking effect of a range hood comprises the following steps:
step A1: obtaining air performance data of the range hood and drawing an air quantity-static pressure curve, and an air quantity-power curve;
step A2: mounting a range hood 1 and a smoke tube 2 of the range hood, wherein an air quantity regulating valve 4 is arranged on the smoke tube 2, the power of a motor of the range hood is controlled by adjusting the opening degree of the valve according to the corresponding relation between the power of the motor of the range hood and the air quantity static pressure, and the smoking effect of the range hood is tested after the power point is in one-to-one correspondence with the power point on an air quantity-power curve; and obtaining smoking effect test results at different working points.
In this embodiment, as shown in fig. 2, the range hood 1 is installed in a simulated kitchen with good sealing performance. The range hood 1 is hung right above the top of the kitchen range 3 according to the installation size in the specification of the range hood. The air volume adjusting valve 4 is installed at the end of the smoke tube 2 and is fixed in the wall hole, and of course, a person skilled in the art can adjust the installation position of the air volume adjusting valve 4 according to the actual use requirement, and the invention is not limited to this embodiment. The distance between the lowest part of the range hood 1 and the gas stove positioned on the cooking bench 3 is the minimum installation height of the mark in the product specification.
The air performance data of the range hood are measured by a measuring method provided by national standard GBT 17713-2011.
In particular, as shown in fig. 3 and 4, the air volume control valve includes: the valve body 41 with the channel, a vane lever 44 rotatably connected with the valve body 41, a vane 43 arranged on the vane lever 44 and arranged in the valve body 1 for adjusting the air quantity passing through the valve body 1, a driving mechanism for driving the vane lever 44 to rotate, and a limiting mechanism for limiting the rotating mechanism. The driving mechanism is a handle fixedly connected with the blade lever 44, and the handle comprises a handle upper blade 411 and a handle lower blade 48 which are combined together, a handle spring 49 arranged between the handle upper blade 411 and the handle lower blade 48, and a spring pin 410 for fixing the handle spring 49. The limiting mechanism comprises a flange 45 fixedly connected with the valve main body 1, a sleeve 46 connected with the flange 45, a limiting disc 47 arranged at the tail end of the sleeve 46, a blade rod 44 penetrating through the flange 45 and the sleeve 46 and connected with the handle, a plurality of through holes matched with the driving mechanism arranged on the limiting disc 47, and limiting pins matched with the through holes arranged on the upper blade of the handle. The upper handle leaf is closed to the lower handle leaf by kneading, so that the limiting pin is separated from the through hole, the handle can be rotated to drive the blade rod to rotate at the moment, and the upper handle leaf is reset under the action of the handle spring to enter the through hole to limit the handle after the handle is loosened. The handle and the blade bar are connected by a lock nut 412, and a first lock bolt 413 and a second lock bolt 414 are mounted on the lock nut 412.
The front end of the valve body 41 is detachably provided with a smoke tube connector 42 for connecting the smoke tube 2, and different smoke tube connectors can be replaced according to the size of the smoke tube. Preferably, the smoke pipe connector is in threaded connection or in snap connection with the valve main body, and obviously, other connection modes can be adopted by those skilled in the art according to actual needs, and the connection modes are not limiting the protection scope of the invention.
In another embodiment, as shown in fig. 5 and 6, the air quantity adjusting valve is a conical adjusting valve, and the conical adjusting valve includes: a valve body 41 with a passage, a mounting rod 415 is provided in the valve body 41, and a tapered valve element 416 is slidably connected to the mounting rod; the mounting rod 415 is coaxially arranged with the channel, and changes the opening of the channel along with the back and forth movement of the conical valve core 416, so as to change the passing air quantity of the valve body. And adjusting the relative position of the conical valve core and the valve body to adjust the air quantity passing through the valve body. Of course, those skilled in the art can change the driving mode of the air volume control valve from manual operation to electric operation instead of the manual air volume control valve of the present embodiment, and the present invention is not limited to the present embodiment.
In this embodiment, the smoking effect detection step of the range hood includes:
step B1: soaking dried kelp in water for one hour, cleaning, draining, cutting into blocks with no water drop, dividing into four parts, and respectively placing into four plates with about 80 g/part;
step B2: starting the range hood and the lighting lamp, and enabling the range hood to operate for 30min at the highest rotation speed gear;
step B3: placing a frying pan on any stove head of the gas stove dual-stove, then starting the gas stove, observing the smoking effect when the single-side stove is stir-fried, wherein the oil absorption effect is whether the oil smoke in the frying pan can be completely sucked away, if the oil smoke escapes, observing the flow direction and the area of the escaping oil smoke, and recording by using a DV machine;
step B4: firstly, a large flame is used for heating the frying pan, and when the frying pan is heated to emit white smoke, the temperature in the frying pan is about 200+/-10 ℃;
step B5: pouring 40ml of vegetable oil into a wok, immediately putting a part of kelp when the oil temperature in the wok is about 290-310 ℃ until the oil emits white smoke, turning over the wok by a turner until the oil smoke is reduced, and when the oil temperature in the wok is about 290-310 ℃ and 20ml of water is put into the wok again, generating the thick smoke again, wherein the first cooking cycle is finished;
step B6: adding 20ml of vegetable oil into the frying pan after the oil smoke is weakened, continuing stir-frying until the kelp emits smoke, at the moment, pouring 20m of water into the frying pan at the temperature of about 290-310 ℃, stir-frying, generating thick smoke again in the frying pan, stir-frying until the oil smoke is weakened, and when the oil smoke is again emitted in the frying pan, at the moment, the temperature of about 290-310 ℃, adding 20ml of water, generating thick smoke again in the frying pan, and ending the second cooking period;
step B7: the above test was repeated with the other burner of the gas range double.
The temperature of the frying pan and the temperature of the oil can be measured by an infrared thermometer. The gas stove keeps a big fire state in the whole stir-frying process.
In the present embodiment, the kinds and weights of the food materials, the amounts of the added edible oil and water are exemplary, and not to be construed as limiting the present invention, and those skilled in the art can adjust according to actual needs.
It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, but is intended to cover modifications and alternatives falling within the spirit and scope of the invention as defined by the appended claims and their equivalents. The portions of the detailed description that are not presented are all prior art or common general knowledge.
Claims (10)
1. The smoke absorbing effect detection method of the range hood is characterized by comprising the following steps of:
step A1: measuring to obtain air performance data of the range hood and drawing an air quantity-static pressure curve, and an air quantity-power curve;
step A2: mounting a range hood and a smoke tube of the range hood, arranging an air quantity regulating valve on the smoke tube, regulating the valve opening of the air quantity regulating valve according to the corresponding relation between the motor power of the range hood, the air quantity and the static pressure, regulating the motor power of the range hood, controlling the one-to-one correspondence between power points and power points on an air quantity-power curve, and then testing the smoking effect of the range hood; and obtaining smoking effect test results at different working points.
2. The method for detecting the smoking effect of a range hood according to claim 1, wherein the air quantity adjusting valve comprises: the valve body with the channel, the blade rod rotatably connected with the valve body, the driving mechanism connected with the blade rod and arranged in the valve body for adjusting the blade passing through the air volume of the valve body and driving the blade rod to rotate.
3. The method of claim 2, wherein the driving mechanism is a handle connected to the blade lever, the handle includes a handle upper blade and a handle lower blade combined together, a handle spring provided between the handle upper blade and the handle lower blade, and a spring pin for fixing the handle spring.
4. The smoke exhaust ventilator smoke effect detection method according to claim 3, wherein the driving mechanism is connected with a limiting mechanism for limiting the driving mechanism, and the limiting mechanism comprises a flange fixedly arranged on the valve main body, a sleeve connected with the flange, and a limiting disc arranged on the sleeve and matched with the driving mechanism; the blade rod passes through the flange and the sleeve and then is connected with the handle, a plurality of through holes are formed in the limiting disc, and limiting pins matched with the through holes are arranged on the upper blade of the handle.
5. The method for detecting the smoking effect of a range hood according to claim 1, wherein the air quantity adjusting valve comprises: a valve body having a passage, a mounting rod mounted in the valve body, a conical valve core slidably provided on the mounting rod; the mounting rod and the channel are coaxially arranged, and the opening of the channel is changed along with the back and forth movement of the conical valve core, so that the air quantity passing through the valve body is changed.
6. The method for detecting the smoking effect of the range hood according to claim 1, wherein the air performance data of the range hood is measured by a measuring method provided by national standard GBT 17713-2011.
7. The method for detecting the smoking effect of a range hood according to claim 1, wherein one end of the air quantity adjusting valve is detachably connected with a smoke pipe connector connected with the smoke pipe, and the air quantity adjusting valve is installed at the tail end of the smoke pipe and fixed in a wall hole.
8. The method for detecting the smoking effect of the range hood according to claim 1, wherein the range hood is installed in a simulated kitchen with good sealing performance, the range hood is hung above a kitchen range table top according to the installation size in a specification, and the vertical distance between the lowest part of the range hood and a gas stove is the minimum installation height marked in the specification.
9. The method for detecting the smoking effect of a range hood according to claim 1, wherein the step of detecting the oil absorbing effect of the range hood comprises the following steps:
step B1: starting the range hood and the lighting lamp, and enabling the range hood to operate for a period of time under the highest rotating speed gear;
step B2: placing a frying pan on any stove head of a gas stove dual-stove, then starting the gas stove, observing the smoking effect of the range hood when the single-side stove is stir-fried, wherein the smoking effect comprises whether all the oil smoke in the frying pan can be sucked away, observing the flow direction and the area of the outward-escaping oil smoke if the oil smoke is outward-escaping, and recording videos;
step B3: and B2, repeating the step with the other cooking range of the gas kitchen range double kitchen ranges.
10. The method for detecting the smoking effect of a range hood according to claim 9, wherein the stir-frying comprises:
step B21: preparing food materials, and equally dividing the food materials into a plurality of parts;
step B22: firstly, a large flame frying pan is used for heating to 200+/-10 ℃;
step B23: pouring a first amount of vegetable oil into the frying pan, continuously heating the frying pan until the oil temperature in the frying pan is 290-310 ℃, immediately adding a part of food material, generating thick smoke by the frying pan, turning over by a turner until the oil temperature in the frying pan is increased to 290-310 ℃ again, adding a certain amount of water, generating the thick smoke again by the frying pan, and ending the first cooking cycle;
step B24: adding a second amount of vegetable oil into the frying pan after the oil fume is weakened, continuously stir-frying until the oil temperature in the frying pan is 290-310 ℃, pouring a certain amount of water into the frying pan and stir-frying, generating thick fume again in the frying pan, stir-frying until the oil fume is weakened, adding a certain amount of water when the oil temperature in the frying pan is 290-310 ℃ again, generating thick fume again in the frying pan, and ending the second cooking cycle after the oil fume is weakened;
the temperature of the frying pan and the oil temperature are measured by an infrared thermometer; the gas stove keeps a big fire state in the whole stir-frying process.
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| CN111434994A (en) * | 2019-01-11 | 2020-07-21 | 宁波方太厨具有限公司 | Oil smoke buffer mechanism for range hood |
| CN209877048U (en) * | 2019-02-22 | 2019-12-31 | 宁波方太厨具有限公司 | Oil smoke buffer mechanism for range hood |
| CN110657478A (en) * | 2019-10-30 | 2020-01-07 | 深圳世纪百利环保科技有限公司 | Multi-stage linkage variable frequency air volume control device |
| CN211315259U (en) * | 2019-11-21 | 2020-08-21 | 江苏普熙斯实业有限公司 | Air volume adjusting valve |
| CN112484116A (en) * | 2020-11-23 | 2021-03-12 | 宁波方太厨具有限公司 | Operation control method of building centralized smoke exhaust system |
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Effective date of registration: 20240109 Address after: 528399 No. 9, Shunyuan South Road, Wusha community, Daliang street, Shunde District, Foshan City, Guangdong Province Patentee after: GUANGDONG MACRO GAS APPLIANCE Co.,Ltd. Patentee after: MACRO THERMAL ENERGY TECHNOLOGY Co.,Ltd. Address before: 528333 No. 9, Shunyuan South Road, Wusha community, Daliang street, Shunde District, Foshan City, Guangdong Province (residence declaration) Patentee before: GUANGDONG MACRO GAS APPLIANCE Co.,Ltd. |