CN114151310B - Heating module for simulating air intake - Google Patents
Heating module for simulating air intake Download PDFInfo
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- CN114151310B CN114151310B CN202111405536.8A CN202111405536A CN114151310B CN 114151310 B CN114151310 B CN 114151310B CN 202111405536 A CN202111405536 A CN 202111405536A CN 114151310 B CN114151310 B CN 114151310B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 20
- 238000005485 electric heating Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims description 10
- 238000010792 warming Methods 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 7
- 241000238631 Hexapoda Species 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Abstract
The invention relates to the technical field of electric heating, and aims to provide a heating module for simulating air intake. Comprising the following steps: a closed box-shaped main body, wherein a circular air outlet is arranged in the center of a bottom plate of the main body; at least three groups of electric heaters are arranged on each side plate, and are uniformly distributed in a circumferential direction by taking the axial direction of the air outlet as the center, and have the same-oriented included angle; an annular guide cylinder is arranged inside the box-shaped main body along the edge of the air outlet, and the upper edge of the guide cylinder is lower than the lower edge of the electric heater; the guide plates are arranged from each side plate of the box-shaped main body to the upper edge of the guide cylinder, are uniformly distributed in a circumferential direction by taking the axial direction of the air outlet as the center, and have the same included angle with the circumferential direction. According to the invention, the plurality of electric heaters are arranged on the closed box-shaped main body, and the heated gas forms spiral annular fluid in the box-shaped main body through the design of the guide cylinder and the guide plate, so that turbulence can be formed to the greatest extent, the air inlet resistance is reduced, and the thermal uniformity of an air field is improved.
Description
Technical Field
The invention relates to the technical field of electric heating, in particular to a heating module for simulating air intake.
Background
In the development and production process of the air compressor, various tests conforming to the process conditions are generally required according to application scenes, which puts demands on the air inlet temperature of the air compressor. But the atmospheric temperature in the normal case is not satisfactory for the test, and therefore the intake air temperature needs to be raised by a heating method.
There are various techniques known in the art for increasing the temperature of the intake air of an air compressor. For example, patent CN203490076U describes an air intake and heating device for an aircraft engine ground room rack, which uses the tail of the turbojet engine to face the opening of the mixing device for mixing cold and hot air; the other end opening of the mixing device is connected with an engine which is opposite to the engine to be heated. The patent application CN110057591a describes an intake heating system of a turboshaft engine, which uses the heat energy of the engine to convert into water heat energy to output high-temperature water and high-temperature air after passing through an energy exchanger, the latter is introduced into a mixer communicated with an air inlet of the engine, and the mixer is used for mixing the high-temperature air and the low-temperature air to input mixed gas meeting the requirement of intake temperature to the air inlet of the engine. However, the prior art generally has the problems of poor heat uniformity of the airflow field, damage to downstream equipment caused by larger impurity inhalation, larger air inlet resistance and the like due to larger changes of ambient temperature and humidity.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and providing a heating module for simulating air intake.
In order to solve the technical problems, the invention adopts the following solution:
There is provided a gas warming module for simulating intake air, comprising: a closed box-shaped body having a circular air outlet provided at the center of a bottom plate thereof for supplying heated gas to an external gas compressor; at least three sets of electric heaters mounted on each side plate of the box-like body; the electric heaters are uniformly distributed in a circumferential direction by taking the axial direction of the air outlet as the center, and have the same included angle with the circumferential direction; an annular guide cylinder is arranged inside the box-shaped main body along the edge of the air outlet, and the upper edge of the guide cylinder is lower than the lower edge of the electric heater; the guide plates are arranged from each side plate of the box-shaped main body to the upper edge of the guide cylinder, are uniformly distributed in a circumferential direction by taking the axial direction of the air outlet as the center, and have the same included angle with the circumferential direction.
As a preferred embodiment of the present invention, the box-like body is composed of a bottom plate, a top plate, and side plates, and the electric heater is installed at an upper portion of each side plate.
As a preferred aspect of the present invention, the box-like body includes a support column provided between adjacent side plates, and both ends thereof are respectively connected to a bottom plate and a top plate of the box-like body.
As a preferable scheme of the invention, the transverse section of the box-shaped main body is in a regular polygon shape, the number of the sides of the box-shaped main body is N, N is more than or equal to 3, or the transverse section of the box-shaped main body is in a round shape.
As a preferable scheme of the invention, each electric heater is a plate-type electric heater which is uniformly distributed in the circumferential direction, and the electric heaters and the circumferential direction have the same included angle.
As a preferable scheme of the invention, each guide plate is a linear guide plate which is uniformly arranged in the circumferential direction, and the included angles of the guide plates and the circumferential direction have the same degree; or each guide plate is an arc guide plate which is uniformly distributed in the circumferential direction, and each arc guide plate has the same curvature and has the same included angle with the circumferential direction.
As a preferable scheme of the invention, the upper edge of the guide cylinder is provided with a dustproof net cover; the axial section of the dust screen is conical and the tip is upward, and the bottom of the dust screen is fixed on the guide cylinder through the support column.
As a preferred embodiment of the present invention, the warming module further includes an intake air temperature sensor, an air pressure sensor, and a humidity sensor mounted on the outer surface of the side plate, and an exhaust air temperature sensor mounted on the guide cylinder.
As a preferable scheme of the invention, the electric heater comprises an upper transverse frame body, a lower transverse frame body and a plurality of vertical partition boards, wherein one end of the electric heater is provided with a detachable tail board, the other end of the electric heater is provided with a wiring terminal, and the wiring terminal comprises a wiring box and a wiring gram head; the electric heating pipes are arranged between the upper transverse frame body and the lower transverse frame body and pass through the vertical partition plates in a reciprocating and turning way, and thermocouples are arranged between the electric heating pipes.
As a preferable mode of the invention, an insect-proof net cover is arranged at the outer side of each electric heater.
Compared with the prior art, the invention has the technical effects that:
1. According to the invention, the plurality of electric heaters are arranged on the closed box-shaped main body, and the heated gas forms spiral annular fluid in the box-shaped main body through the design of the guide cylinder and the guide plate, so that turbulent flow can be formed to the greatest extent, and uniform mixing of the discharged gas is realized.
2. The design of the gas flow passage can reduce the air inlet resistance and improve the thermal uniformity of the gas field.
3. The design of the sealed box main body, the insect-proof net and the dust-proof net can prevent foreign matters such as external impurities, small insects and the like from being introduced into the gas compressor to the greatest extent, and avoid influencing experimental effects or causing equipment loss.
4. According to the invention, the temperature sensor, the air pressure sensor and the humidity sensor are arranged on the outer side of the box main body, and the temperature sensor is arranged on the guide cylinder, so that the heating power parameter of the electric heater can be further accurately regulated according to the inlet air outlet parameter.
Drawings
FIG. 1 is a schematic diagram of the external structure of a gas heating module according to the present invention.
FIG. 2 is a schematic diagram of the internal structure of the gas heating module according to the present invention.
FIG. 3 is an axial cross-sectional schematic view of the gas warming module of FIG. 1.
Fig. 4 is a schematic structural view of an electric heater.
Fig. 5 is a top view of the electric heater.
The reference numerals in the drawings are: an electric heater 100; an electric heating tube 110;111 temperature measuring tube; stainless steel tie 112; a thermocouple 113; an air pressure sensor 114; a humidity sensor 115; an intake air temperature sensor 116; junction box 120; a cable gland 121; temperature control signal gram head 122; junction box door 123; a horizontal frame 130; a vertical partition plate 131; a detachable tail plate 132; a fixing bolt 133; a box-like body 200; a side plate 210; a door 211; a wall box 212; support columns 220; a top plate 230; an air outlet 300; a guide cylinder 310; an exhaust gas temperature sensor 311; a dust screen 320; a stay 321; a baffle 330.
Detailed Description
The numbering of the components itself, e.g. "first", "second", etc., in the present application is used only to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
The following describes in detail the embodiments of the present invention with reference to the drawings.
The invention relates to a gas heating module for simulating air intake, which comprises a closed box-shaped main body 200, a bottom plate, a top plate 230 and at least three side plates 210; for stable installation, a support column 220 may be provided between the adjacent side plates 210, and upper and lower ends of the support column 220 are connected to the bottom plate and the top plate 230, respectively.
A circular air outlet 300 is provided in the center of the bottom plate for supplying heated air to an external air compressor (not shown). A group of electric heaters 100 is installed at the upper portion of each side plate 210, respectively. The electric heaters 100 are uniformly arranged in a circumferential direction with the axial direction of the air outlet 300 as the center, and have the same included angle with the circumferential direction.
Inside the box-shaped body 200, an annular guide cylinder 310 is provided along the edge of the air outlet 300, the upper edge of the guide cylinder 310 being lower than the lower edge of the electric heater 100; the guide plates 330 are arranged between each side plate 210 and the upper edge of the guide cylinder 310, and each guide plate 330 is uniformly arranged in a circumferential direction with the axial direction of the air outlet 300 as the center and has an included angle with the circumferential direction in the same direction. Based on the design of the guide cylinder 310 and the guide plate 330, the gas to be heated can pass through each electric heater 100 under the suction effect of the external gas compressor; and enters the inside of the box-like body 200 in a spiral manner, and is discharged from the air outlet 300 in the form of a rotating air ring after turbulent mixing is completed. Therefore, the inlet air temperature entering the gas compressor can be ensured to be stable and balanced all the time, and conditions are provided for high-quality research and development production.
In the present invention, the transverse cross section of the box-like body 200 is in the shape of a regular polygon, and the number of sides thereof is N, N.gtoreq.3. For example, it may be square in fig. 1, pentagonal, hexagonal, or even circular.
Preferably, each electric heater 100 is a plate-type electric heater which is uniformly arranged in a circumferential direction, and each electric heater 100 has an included angle with the circumferential direction with the same degree, and the included angle a ranges from 45 degrees to 90 degrees. Each baffle 330 is a linear baffle uniformly arranged in a circumferential direction, and each baffle has an included angle (as shown in fig. 2) with the same degree with the circumferential direction, and the included angle b ranges from 0 to 45 degrees; or each baffle 330 is an arc baffle uniformly arranged in a circumferential direction, each arc baffle has the same curvature and has an included angle with the circumferential direction with the same degree, and the included angle ranges from 0 to 45 degrees.
In order to prevent the gas from carrying foreign matters into the gas compressor, a dust screen 320 is further provided at the upper edge of the guide cylinder 310; the axial section of the dust screen 320 is conical and pointed upwards, and the bottom of the dust screen is fixed on the upper edge of the guide cylinder 310 through a support 321. In order to prevent insects, moths, etc. from being carried by the gas or attracted by the temperature of the electric heater 100, causing adsorption on the electric heating pipe 110 to affect the heating effect and ventilation effect, an insect-proof net cover may be provided outside each electric heater. The dust screen 320 and the insect screen are kept periodically cleaned during use.
In order to accurately control the temperature of the inlet air entering the gas compressor, the invention monitors the inlet and outlet air parameters of the gas heating module. As shown in fig. 1 and 3, a plurality of intake air temperature sensors 116, an air pressure sensor 114, and a humidity sensor 115 are provided on the outer surfaces of the different side plates 210, and an exhaust air temperature sensor 311 is provided on the guide case.
As an application example of a plate heater, the electric heater 100 includes upper and lower horizontal frames 130 and a plurality of vertical partitions 131; a detachable tail plate 132 is arranged at one end of the electric heater 100, and a wiring terminal is arranged at the other end, wherein the wiring terminal comprises a wiring box 120 and a wiring gram head; the electric heating pipe 110 is disposed between the two lateral frames 130 and reciprocally passes through each vertical partition 131 in a turn. In order to prevent the dry heating from exceeding the temperature, a thermocouple 113 is provided between the electric heating pipes 110.
The heating module can adjust the size and the material selection according to the requirements of actual application scenes. For example, each panel and the internal structure of the box-shaped main body 200 can be formed by processing acrylic plates, the size of the panel and the internal structure meets the air inflow requirement of a small-sized air compressor, and the arrangement is suitable for application scenes under laboratory conditions of schools. Or each panel and the internal structure of the box-shaped main body 200 can be processed by stainless steel plates or iron plates, the size is suitable for the air inflow requirement of the medium-sized gas compressor, and the arrangement is suitable for the application scene under the research and development test conditions of factories. Or each panel and the internal structure of the box-like body 200 may be constructed of concrete, and the size is suitable for the intake air amount requirement of the large-sized gas compressor, and such arrangement is suitable for the application scenario under the factory production test conditions (as shown in fig. 1).
The heating module can also adjust the installation direction according to the requirements of actual application scenes. For example, the air outlet 300 may be provided on the panel in all directions corresponding to the box-shaped body 200 having a relatively small size, and is not limited to the floor opening. For the box-like body 200 of concrete construction, it is also possible to choose to provide the air outlet 300 on the top plate 230, so that it is possible to dispense with perforating the bottom plate and laying the underground ventilation duct; however, since the installation position of the electric heater 100 is correspondingly adjusted to the lower portion of the side plate 210, it is considered that a safety protection facility is provided outside the box-shaped body 200 to prevent injury accidents caused by approaching small animals or persons.
For example, as shown in the drawings of the present application, the box-like body 200 takes the form of a concrete construction build. To ensure safety and maintenance convenience, the electric heater 100 is installed at the upper portion of the side plate 210 to prevent a person or a small animal from touching. A door 211 is also provided on one of the side plates 210 for installation and maintenance work to be performed inside. Because of the large size of the electric heater 100, a detachable tail plate 132 design is used for ease of installation and maintenance. Because of the large size, to avoid non-uniformity of intake air temperature in different directions, one intake air temperature sensor 116 is installed at the outside of each side plate 210, so as to precisely calculate and control the power of different electric heaters 100.
The electric heater 100 is internally provided with a temperature measuring tube 111 which is bound with an electric heating tube 110, a thermocouple 113 is inserted into the temperature measuring tube 111, and the temperature measuring tube is bound with a stainless steel binding belt 112. The junction box 120 is provided with a cable glan 121, a temperature control signal glan 122 and a junction box door 123. The electric heater 100 is disposed at an angle to the side plate, so as to form a spiral air flow in cooperation with the deflector 330.
Claims (9)
1. A gas warming module for simulating an intake, comprising:
A closed box-shaped body having a circular air outlet provided at the center of a bottom plate thereof for supplying heated gas to an external gas compressor;
At least three sets of plate-type electric heaters mounted on each side plate of the box-like body; the electric heaters are uniformly distributed in a circumferential direction by taking the axial direction of the air outlet as the center, and have the same included angle with the circumferential direction;
an annular guide cylinder is arranged inside the box-shaped main body along the edge of the air outlet, and the upper edge of the guide cylinder is lower than the lower edge of the electric heater; the guide plates are arranged from each side plate of the box-shaped main body to the upper edge of the guide cylinder, are uniformly distributed in a circumferential direction by taking the axial direction of the air outlet as the center, and have included angles with the circumferential direction in the same direction; after the gas to be heated passes through each plate-type electric heater and enters the box-shaped main body, the gas enters the guide cylinder in a spiral mode under the guidance of the guide plate to realize turbulent mixing, and is discharged from the air outlet in the form of a rotary gas ring.
2. A gas warming module for simulating air intake according to claim 1 wherein the box-like body is composed of a bottom plate, a top plate, and side plates, and the electric heater is mounted on an upper portion of each side plate.
3. A gas warming module for simulating air intake according to claim 1 wherein the box-like body includes support columns disposed between adjacent side plates, the ends of which are connected to the bottom and top plates of the box-like body, respectively.
4. The gas warming module for simulating air intake of claim 1, wherein the box-like body has a cross-section in the shape of a regular polygon with a number of sides N, N being equal to or greater than 3; or the box-like body has a circular transverse cross-section.
5. The air heating module for simulating air intake of claim 1, wherein each baffle is a linear baffle uniformly arranged in a circumferential direction, and each baffle has an included angle with the circumferential direction of the same degree; or each guide plate is an arc guide plate which is uniformly distributed in the circumferential direction, and each arc guide plate has the same curvature and has the same included angle with the circumferential direction.
6. The air heating module for simulating air intake of claim 1, wherein a dust screen is provided at an upper edge of the guide cylinder; the axial section of the dust screen is conical and the tip is upward, and the bottom of the dust screen is fixed on the guide cylinder through the support column.
7. The air warming module for simulating air intake of claim 1, further comprising an air intake temperature sensor, an air pressure sensor, and a humidity sensor mounted on an outer surface of the side plate, and an exhaust temperature sensor mounted on the guide cylinder.
8. The air heating module for simulating air intake of any one of claims 1 to 7, wherein the electric heater comprises upper and lower horizontal frames and a plurality of vertical partitions, one end of which is provided with a detachable tail plate and the other end is provided with a terminal, and the terminal comprises a junction box and a junction glan; the electric heating pipes are arranged between the upper transverse frame body and the lower transverse frame body and pass through the vertical partition plates in a reciprocating and turning way, and thermocouples are arranged between the electric heating pipes.
9. The air warming module for simulating air intake of any one of claims 1 to 7, wherein an insect screen is provided outside each of the electric heaters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111405536.8A CN114151310B (en) | 2021-11-24 | 2021-11-24 | Heating module for simulating air intake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111405536.8A CN114151310B (en) | 2021-11-24 | 2021-11-24 | Heating module for simulating air intake |
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| Publication Number | Publication Date |
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| CN114151310A CN114151310A (en) | 2022-03-08 |
| CN114151310B true CN114151310B (en) | 2024-06-18 |
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| CN202111405536.8A Active CN114151310B (en) | 2021-11-24 | 2021-11-24 | Heating module for simulating air intake |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109520125A (en) * | 2018-09-29 | 2019-03-26 | 江苏九州电器有限公司 | A kind of air duct heater of homogeneous heating |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2345908C1 (en) * | 2008-01-29 | 2009-02-10 | Общество с ограниченной ответственностью Научно-производственная фирма "ЭТНА-Т" | Electric transport compartment air heater |
| JP5310736B2 (en) * | 2008-12-04 | 2013-10-09 | 三菱電機株式会社 | Air conditioner |
| RU2494257C1 (en) * | 2012-04-16 | 2013-09-27 | Александр Михайлович Цыба | Mine air-heating plant |
| CN202855528U (en) * | 2012-06-05 | 2013-04-03 | 安徽省电力公司马鞍山供电公司 | Explosion-proof membrane protective cover of power grid SF6 current transformer |
| KR101490861B1 (en) * | 2013-03-15 | 2015-02-06 | 김진재 | Cyclone blower heater for cattle shed and plant cultivation |
| CN104101086A (en) * | 2014-06-30 | 2014-10-15 | 南京冠超工业自动化有限公司 | Air electric heating barrel |
| KR101847945B1 (en) * | 2017-02-09 | 2018-04-11 | 씨엠티 주식회사 | Spin dryer equipped with multi drying device |
| CN206860318U (en) * | 2017-07-10 | 2018-01-09 | 中国人民解放军装甲兵工程学院 | Novel air pre-flock device |
| CN107655061A (en) * | 2017-10-20 | 2018-02-02 | 温州临界科技有限公司 | A kind of heater |
| CN111365219B (en) * | 2018-12-26 | 2021-04-27 | 东北大学 | Multifunctional vacuum pump test cover |
| CN209926601U (en) * | 2019-04-30 | 2020-01-10 | 曹江涛 | Air electric heating device |
| CN210829476U (en) * | 2019-10-14 | 2020-06-23 | 四川特禾顺环境治理有限公司 | Automobile air inlet flow guide device |
| CN211019749U (en) * | 2019-10-29 | 2020-07-14 | 上海精顶塑胶制品有限公司 | Flow guide air heat dissipation dustproof mesh enclosure capable of stabilizing power output |
| CN213311876U (en) * | 2020-07-15 | 2021-06-01 | 深圳市鼎品电器有限公司 | Lower air-out type disinfection cabinet |
| CN113230811A (en) * | 2021-06-16 | 2021-08-10 | 苏州微知电子科技有限公司 | Air purification device based on aerosol removes dust |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520125A (en) * | 2018-09-29 | 2019-03-26 | 江苏九州电器有限公司 | A kind of air duct heater of homogeneous heating |
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