CN112881106A - Heater for gas detection sampling and heating control method thereof - Google Patents
Heater for gas detection sampling and heating control method thereof Download PDFInfo
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- CN112881106A CN112881106A CN202110294618.3A CN202110294618A CN112881106A CN 112881106 A CN112881106 A CN 112881106A CN 202110294618 A CN202110294618 A CN 202110294618A CN 112881106 A CN112881106 A CN 112881106A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
Abstract
The invention discloses a heater for gas detection sampling, which comprises a heat conduction pipe sleeved outside a sampling pipe, wherein a heating assembly, a heat preservation assembly and a fixed shell are sequentially sleeved outside the heat conduction pipe; the heating assembly heats the sampling pipe through the heat conduction pipe, and is connected with a heating controller which controls the heating mode, the heating time and the heating duration of the heating assembly; according to the heater in the technical scheme, the heat conduction pipe is sleeved outside the sampling pipe, and the heating assembly heats and dries the detection gas passing through the sampling pipe through the heat conduction pipe and the sampling pipe, so that the accuracy of particle detection is improved; the heater has ensured that the heater can realize touch etc. in the heating through the setting of heat pipe, heating element, heat preservation subassembly and fixed shell, and its fixed shell outside can not cause the electric shock or scald, and the setting of heat preservation subassembly has reduced thermal loss, and is safe energy-conserving.
Description
Technical Field
The invention belongs to the field of heating and drying, and particularly relates to a heater for gas detection and sampling and a heating control method thereof.
Background
In recent years, with the continuous promotion of urbanization and industrialization, atmospheric particulates become the first pollutants affecting the air quality of urban environments in China, especially in spring floating dust weather, autumn straw burning period and winter heating period. The particulate matter mainly refers to inhalable particulate matter (PM10, i.e., particulate matter having an aerodynamic equivalent diameter of 10 μm or less) and fine particulate matter (PM2.5, i.e., particulate matter having an aerodynamic equivalent diameter of 2.5 μm or less) and is divided into primary particulate matter and secondary particulate matter.
Among the prior art, the detection principle of the check out test set of particulate matter in the air is mainly through the paper tape etc. that have certain filtering action with the air, and gaseous through the paper tape, and particulate matter etc. in the gas is dammed by the paper tape, stops on the paper tape, realizes realizing the detection to the air quality to the detection of particulate matter content in the air of certain volume and flow. In the detection, the humidity of the air is the most main factor influencing the detection structure, and how to rapidly realize the heating and drying of the detection air without influencing the quality of the air is an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a heater for gas detection and sampling, which can heat detection gas through a sampling pipe, is quick in heating, has no influence on the detection gas and ensures the accuracy of a detection structure.
Another object of the present invention is to provide a heating control method for a heater for gas detection sampling, which can select a heating mode and a time as required while ensuring that heating is completed as required during detection, thereby saving cost and prolonging the service life of the heater.
The heater for gas detection and sampling comprises a heat conduction pipe sleeved outside a sampling pipe, wherein a heating assembly, a heat insulation assembly and a fixed shell are sequentially sleeved outside the heat conduction pipe; the heating assembly heats the sampling pipe through the heat conduction pipe, the heating assembly is connected with a heating controller, and the heating controller controls the heating mode, the heating time and the heating duration of the heating assembly.
Preferably, the heat conduction pipe is waist-shaped in cross section and comprises an inner cylindrical hole penetrating through the sampling pipe and two first planes oppositely arranged on the outer surface, and the heating assembly is arranged on the two first planes.
Preferably, the heating assembly comprises two heating blocks, and the two heating blocks are respectively arranged on the two first planes.
Preferably, the heat preservation subassembly include with the high temperature insulation cover that the heat pipe suited, the high temperature insulation cover cross section personally submits circularly, and including the cross section with the hole that the heat pipe suited, the hole is including two relative second planes that set up, the second plane set up with first plane relatively and with first plane between form the heating element and hold the district, the heating element is arranged in the heating element and is held the district.
Preferably, the high-temperature insulating sleeve comprises an upper insulating sleeve and a lower insulating sleeve which are oppositely arranged, the upper insulating sleeve and the lower insulating sleeve respectively comprise a column pipe which is adaptive to the heat conduction pipe and an end face which isolates the heat conduction pipe from the fixed shell, and the upper insulating sleeve and the lower insulating sleeve are respectively fixedly installed with the heat conduction pipe at the end face positions through fasteners; go up the insulation cover and be provided with the pipeline holding tank, the pipeline holding tank includes the branch groove that suits with two second planes and connects the main tank in two branch grooves, the main tank sets up go up the insulation cover and keep away from the terminal surface outside of insulation cover down.
Preferably, the fixed housing comprises a cylindrical barrel body without a top cover and a detachable top cover adapted to the cylindrical barrel body, and the cylindrical barrel body and the detachable top cover are both fixedly connected with the heat preservation assembly; the detachable top cover is provided with a wire hole, and the direction of the wire hole is opposite to that of the main groove.
Preferably, the heating controller comprises a PID controller, a humidity sensor for acquiring the temperature and humidity of the detected object, and a PWM control module connected to the heating assembly, wherein the PID controller receives the temperature and humidity of the sample air fed back by the humidity sensor, and then selects the heating mode, the heating time and the heating duration of the heating assembly through the PWM control module.
A heating control method of a heater for gas detection sampling comprises the following control processes:
(1) the humidity sensor extracts the humidity of the sampling gas and transmits a signal to the PID controller, and the PID controller selects a heating mode of the heating assembly through the PWM control module according to the humidity of the sampling gas;
according to the humidity of the sampling gas, the heating modes of the heating assembly sequentially comprise a non-heating mode, a heat preservation mode, a normal heating mode and a rapid heating mode from low to high;
(2) after the heating mode is selected, the heating time and duration are selected again according to the humidity;
firstly, dividing a complete detection period into an air extraction stage and a detection stage; when the non-heating mode is selected, the heating components do not work in the air extraction stage and the detection stage; when any one of the heat preservation mode, the normal heating mode and the rapid heating mode is selected, the heating assembly must work in the air extraction stage;
according to the sampling gas humidity, when the humidity is larger than a set value, the heating assembly needs to preheat the sampling tube or pre-start the heating assembly in the detection stage, and oxygen passing through the sampling tube can be immediately heated in the air extraction stage.
Preferably, the heating assembly in the keep warm mode is heated in a low power heating state, the heating assembly in the normal heating mode has a low power heating state and a normal power heating state, and the heating assembly in the rapid heating mode has a high power heating state and a low power heating state.
The heater for gas detection sampling in the technical scheme of the invention has the beneficial effects that:
1. through establishing the heat pipe at the outside cover of sampling pipe, heating element heats and the drying through heat pipe and sampling pipe to the intraductal detection gas of process of sampling, improves particulate matter detection's the degree of accuracy.
2. The heater has ensured that the heater can realize touch etc. in the heating through the setting of heat pipe, heating element, heat preservation subassembly and fixed shell, and its fixed shell outside can not cause the electric shock or scald, and the setting of heat preservation subassembly has reduced thermal loss, and is safe energy-conserving.
The heating control method of the heater for gas detection sampling in the technical scheme of the invention has the beneficial effects that: through the selection to heating mode, heating opportunity and heating duration, accomplish to carry out the dry prerequisite of heating to detecting gas under, can effectual saving cost, and extension heating element life.
Drawings
Figure 1 is a cross-sectional schematic view of a heater for gas detection sampling according to the present invention,
figure 2 is a cross-sectional view taken along line a-a of figure 1,
figure 3 is a cross-sectional view taken along line B-B of figure 1,
figure 4 is a schematic view of the structure of the upper thermal insulation sleeve,
figure 5 is another view structure diagram of the upper insulating sleeve,
figure 6 is a schematic view of a removable top cover configuration,
fig. 7 is a schematic view illustrating a heating control method of a heater according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
As shown in fig. 1 to fig. 3, a heater for gas detection and sampling according to the technical solution of the present invention includes an aluminum heat pipe 2 sleeved outside a sampling tube 1, and a heating component 5, a heat preservation component 3, and a fixed housing 4 are sequentially sleeved outside the heat pipe 2. Heating element 5 heats for sampling pipe 1 through heat pipe 2, and sampling pipe 1 after the heating heats the dehumidification to the gas that detects through it in. The heating assembly 5 is connected with a heating controller, and the heating controller controls a heating mode, a heating time and a heating time of the heating assembly 5.
Above-mentioned technical scheme's setting of heater realizes detecting the dehumidification of gas in the particulate matter detects, according to the particulate matter detection principle, when the great detection gas of humidity passes through the filter paper on the particulate matter detection device, destroys filter paper, influences the testing result and detects precision and detection accuracy.
Based on above-mentioned technical scheme, during the use, set up the whole cover of heater in sampling pipe 1 outside to it is fixed with sampling pipe 1 through the supplementary fixing device (like pipe clamp, ferrule etc.) of peripheral hardware, and 2 internal diameters of heat pipe suit with 1 external diameter of sampling pipe, heat direct transfer to sampling pipe 1 on the heat pipe 2, heat the dehumidification to the gas that detects through in the sampling pipe 1. The heat conducting pipe 2 is made of aluminum, so that the heat conducting performance is improved, and the contact section of the sampling pipe 1 and the heat conducting pipe 2 is also made of materials with good heat conducting capacity, such as aluminum, copper, iron and the like. In the technical scheme, the heat preservation component 3 is arranged, so that on one hand, heat preservation and isolation of the heat conduction pipe 2 are realized, the temperature loss on the heat conduction pipe 2 is avoided, and the heating capacity is improved; on the other hand, the setting of heat preservation subassembly 3 has realized the isolation to the temperature, avoids on a large amount of heat transfer to fixed shell, leads to fixed shell temperature high, and appears scalding operating personnel's problem.
As shown in FIG. 1, the heat conductive pipe 2 has a kidney-shaped cross section, and includes an inner cylindrical hole passing through the sampling tube 1 and two first planes 21 oppositely disposed on the outer surface, and the heating element 5 is disposed on the two first planes 21. The first plane 21 is arranged to facilitate the installation and arrangement of the heating assembly 5; on the other hand, the distance between the heating component and the sampling pipe is effectively reduced, so that the heat generated by the heating component 5 can be quickly transferred to the sampling pipe, and the integral heating and dehumidifying capacity of the heater is improved.
As shown in fig. 1, the heating assembly 5 includes two heating blocks 51, and the two heating blocks 51 are disposed on the two first planes 21, respectively. Two first plane symmetries set up, are being provided with heating block 51 respectively, are convenient for heat pipe 2 even heating for the sampling pipe heating is even, improves heating drying ability and efficiency.
As shown in fig. 2 and 3, the thermal insulation component 3 includes a high-temperature insulation jacket adapted to the heat pipe, and the high-temperature insulation jacket has a circular cross section and includes an inner hole having a cross section adapted to the heat pipe 2. The inner hole comprises two oppositely arranged second planes 35, and the second planes 35 are arranged opposite to the first planes 21 and form a heating component accommodating area with the first planes 21. The heating element 5 is disposed in the heating element receiving area. The heating assembly is fixed through the high-temperature insulating sleeve, so that the heating assembly is convenient to install and fix.
As shown in fig. 2 to 5, the high temperature insulating jacket includes an upper insulating jacket 31 and a lower insulating jacket 32 which are oppositely disposed. Both the upper jacket 31 and the lower jacket 32 comprise pillars 36 adapted to the heat pipes 2 and end faces 37 separating the heat pipes 2 from the fixed shell 4. The upper heat insulating sleeve 31 and the lower heat insulating sleeve 32 are fixedly mounted with the heat conducting pipe 2 at the end surface 37 position through fasteners respectively. The fastener connecting the end surface 37 and the heat pipe 2 is disposed inside the end surface 37, and does not contact the fixed housing 4, thereby achieving an insulating function.
As shown in fig. 4 and 5, the upper insulating sheath 31 is provided with a pipeline accommodating groove, which includes a sub-groove 33 corresponding to the two second planes 36 and a main groove 34 connecting the two sub-grooves 33, and the main groove 34 is disposed outside an end surface 37 of the upper insulating sheath 31 far away from the lower insulating sheath 32. The setting of pipeline holding tank, the heating element 5 of being convenient for carries out electrically conductive wiring, also avoids the wire to appear rocking and interfering the scheduling problem in wiring and work, reduces heating element 5 and the holistic fault rate of heater.
As shown in fig. 6, the stationary housing 4 includes a non-top-capped cylindrical barrel 41 and a removable top cap 42 that fits over the cylindrical barrel 41. The cylindrical barrel 41 and the detachable top cover 42 are both fixedly connected with the heat preservation assembly 3. The detachable top cover 42 is provided with a wire hole 43, the direction of the wire hole 43 is opposite to the direction of the main groove 34, and the wire hole 43 and the main groove 34 are combined to fix a wire on the heating assembly 5 exactly, so that wiring is facilitated.
Based on the above technical scheme, a temperature control switch and a fuse are connected in series on a lead electrically connected with the heating block 51 for controlling the overall temperature of the heating device, and the damage to the overall heater due to the overhigh temperature of the wire caused by overlong heating time or long-time high-power processing is avoided.
Based on above-mentioned technical scheme, fixed shell 4 structural design, 3 structural design of heat preservation subassembly and the 5 structural design of heating element, still be convenient for carry out fault repair and change to heating element 5, need not abandon whole heating element, save the cost.
Referring to fig. 7, in the technical solution of the present invention, the heating controller includes a PID controller, a humidity sensor for acquiring the temperature and humidity of the detected object, and a PWM control module connected to the heating assembly, the PID controller receives the temperature and humidity sampled by the humidity sensor, and then selects the heating mode, the heating time, and the heating duration of the heating assembly through the PWM control module. The PWM control module realizes that the heating assembly has four working modes, namely a non-heating mode, a heat preservation mode, a normal heating mode and a rapid heating mode. The particle detection device comprises an air exhaust stage and a detection stage in a complete detection period, and the air exhaust operation is not carried out in the detection stage.
Referring to fig. 7, a heating control method of a heater for gas detection sampling includes the following control processes:
(1) the humidity sensor extracts the humidity of the sampling gas and transmits a signal to the PID controller, and the PID controller selects a heating mode of the heating assembly through the PWM control module according to the humidity of the sampling gas;
according to the humidity of the sampling gas, the heating modes of the heating assembly sequentially comprise a non-heating mode, a heat preservation mode, a normal heating mode and a rapid heating mode from low to high;
(2) after the heating mode is selected, the heating time and duration are selected again according to the humidity;
firstly, dividing a complete detection period into an air extraction stage and a detection stage; when the non-heating mode is selected, the heating components do not work in the air extraction stage and the detection stage; when any one of the heat preservation mode, the normal heating mode and the rapid heating mode is selected, the heating assembly must work in the air extraction stage;
according to the sampling gas humidity, when the humidity is larger than a set value, the heating assembly needs to preheat the sampling tube or pre-start the heating assembly in the detection stage, and oxygen passing through the sampling tube can be immediately heated in the air extraction stage.
The heating assembly in the heat preservation mode adopts a low-power heating state for heating, the heating assembly in the normal heating mode has a low-power heating state and a normal-power heating state, and the heating assembly in the rapid heating mode has a high-power heating state and a low-power heating state.
To further understand the heating control method of the heater, a specific embodiment will be described below.
First, assume that the air humidity ψ, with the four top values set, 0, A, B, C, where 0 < a < B < C, ranges of the air humidity ψ are: psi is less than or equal to A, A is less than or equal to psi and less than or equal to B, B is less than psi and less than or equal to C, psi is greater than C, and the four levels respectively correspond to a non-heating mode, a heat preservation mode, a normal heating mode and a rapid heating mode.
And then setting a complete detection cycle time of the particulate matter detection as T, wherein T1 is an air exhaust stage, T2 is a detection stage, T3 is a preparation stage, and the sum of the time of T1, T2 and T3 is T. Wherein T1 > T2.
The control process is as follows: firstly, a humidity sensor works, the humidity psi of sampling gas is extracted, a humidity psi signal is transmitted to a PID controller, and the PID controller selects a heating mode of a heating assembly through a PWM control module according to the humidity psi of the sampling gas;
if psi is less than or equal to A, selecting a non-heating mode, wherein the heating assembly is always in a closed state and does not work.
If A is more than psi and less than or equal to B, selecting a heat preservation mode, namely adopting a low-power heating state in the whole detection period. At the moment, in a T1 time period of the air extraction stage, the heating assembly is heated in a low-power heating state to heat and evaporate water gas with lower content in the detected gas; also adopt the low-power heating state to heat in T2 and T3 time, heat and keep warm to the sampling pipe, guarantee when getting into the stage of bleeding, the sampling pipe can be to the detection gas through it heating dehumidification, guarantee that heating work in time goes on, and adopt constant temperature heating.
If B is larger than psi and smaller than C, selecting a normal heating mode, wherein the normal heating mode comprises two heating stages, namely a normal power heating state and a low power heating state. In a time period T1, the heating assembly is heated in a normal power heating state, and water vapor contained in the detection gas is heated and evaporated; heating in T2 and T3 time low power heating state, heating heat preservation to the sampling pipe, guarantee when getting into the stage of bleeding, the sampling pipe can be to the detection gas through it heating dehumidification, guarantee that heating work is in time gone on, and adopt constant temperature heating. Generally, the normal heating mode is adopted when the air humidity ψ is higher than 35% and lower than 75%.
If ψ > C, a rapid heating mode is selected in which two heating stages, a high power heating state and a low power heating state, are divided. During the time period T1, the heating assembly is heated in the high-power heating state, and during the detection period T2, the heating assembly is heated in the low-power heating state. In the preparation stage of T3, the sampling tube is preheated by using the high-power heating state, that is, the sampling tube is heated by using the high-power heating state before the air exhaust stage, so that the sampling tube entering the air exhaust stage has higher temperature, and the heating assembly enters the air exhaust stage in the high-power heating state. The quick heating mode effectively achieves the purpose of quickly and efficiently heating the high-humidity detection gas.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.
Claims (9)
1. A heater for gas detection sampling is characterized by comprising a heat conduction pipe sleeved outside a sampling pipe, wherein a heating assembly, a heat preservation assembly and a fixed shell are sequentially sleeved outside the heat conduction pipe; the heating assembly heats the sampling pipe through the heat conduction pipe, the heating assembly is connected with a heating controller, and the heating controller controls the heating mode, the heating time and the heating duration of the heating assembly.
2. The heater for gas detection sampling according to claim 1, wherein the heat conductive pipe has a kidney-shaped cross section, and includes an inner cylindrical hole passing through the sampling pipe and two first planes oppositely disposed on the outer surface, and the heating element is disposed on the two first planes.
3. The heater for gas detection sampling according to claim 2, wherein the heating assembly comprises two heating blocks, and the two heating blocks are respectively disposed on the two first planes.
4. The heater for gas detection and sampling according to claim 1, wherein the thermal insulation component comprises a high-temperature insulation sleeve adapted to the heat pipe, the high-temperature insulation sleeve is circular in cross section and comprises an inner hole adapted to the heat pipe in cross section, the inner hole comprises two second planes which are oppositely arranged, the second plane is oppositely arranged with the first plane and forms a heating component accommodating area with the first plane, and the heating component is arranged in the heating component accommodating area.
5. The heater for gas detection and sampling according to claim 4, wherein the high temperature insulation jacket comprises an upper insulation jacket and a lower insulation jacket which are oppositely arranged, the upper insulation jacket and the lower insulation jacket each comprise a column pipe adapted to a heat conduction pipe and an end surface for isolating the heat conduction pipe from the fixed shell, and the upper insulation jacket and the lower insulation jacket are fixedly mounted with the heat conduction pipe at end surface positions through fasteners respectively; go up the insulation cover and be provided with the pipeline holding tank, the pipeline holding tank includes the branch groove that suits with two second planes and connects the main tank in two branch grooves, the main tank sets up go up the insulation cover and keep away from the terminal surface outside of insulation cover down.
6. The heater for gas detection and sampling according to claim 1, wherein the fixed housing comprises a non-top-cap cylindrical barrel and a detachable top cap adapted to the cylindrical barrel, and both the cylindrical barrel and the detachable top cap are fixedly connected to the thermal insulation assembly; the detachable top cover is provided with a wire hole, and the direction of the wire hole is opposite to that of the main groove.
7. The heater for gas detection and sampling according to claim 1, wherein the heating controller comprises a PID controller, a humidity sensor for obtaining temperature and humidity of a detected object, and a PWM control module connected to the heating assembly, wherein the PID controller receives the temperature and humidity of the sampled gas fed back by the humidity sensor, and then selects a heating mode, a heating time and a heating duration of the heating assembly through the PWM control module.
8. A heating control method of a heater for gas detection sampling is characterized by comprising the following control processes:
(1) the humidity sensor extracts the humidity of the sampling gas and transmits a signal to the PID controller, and the PID controller selects a heating mode of the heating assembly through the PWM control module according to the humidity of the sampling gas;
according to the humidity of the sampling gas, the heating modes of the heating assembly sequentially comprise a non-heating mode, a heat preservation mode, a normal heating mode and a rapid heating mode from low to high;
(2) after the heating mode is selected, the heating time and duration are selected again according to the humidity;
firstly, dividing a complete detection period into an air extraction stage and a detection stage; when the non-heating mode is selected, the heating components do not work in the air extraction stage and the detection stage; when any one of the heat preservation mode, the normal heating mode and the rapid heating mode is selected, the heating assembly must work in the air extraction stage;
according to the sampling gas humidity, when the humidity is larger than a set value, the heating assembly needs to preheat the sampling tube or pre-start the heating assembly in the detection stage, and oxygen passing through the sampling tube can be immediately heated in the air extraction stage.
9. The heating control method of the heater for gas detection sampling according to claim 8, wherein the heating module in the keep warm mode is heated in a low power heating state, the heating module in the normal heating mode has a low power heating state and a normal power heating state, and the heating module in the rapid heating mode has a high power heating state and a low power heating state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110294618.3A CN112881106A (en) | 2021-03-19 | 2021-03-19 | Heater for gas detection sampling and heating control method thereof |
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| CN202110294618.3A CN112881106A (en) | 2021-03-19 | 2021-03-19 | Heater for gas detection sampling and heating control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624544A (en) * | 2022-05-11 | 2022-06-14 | 苏州朗高智能科技有限公司 | Heater part fault detection device |
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2021
- 2021-03-19 CN CN202110294618.3A patent/CN112881106A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624544A (en) * | 2022-05-11 | 2022-06-14 | 苏州朗高智能科技有限公司 | Heater part fault detection device |
| CN114624544B (en) * | 2022-05-11 | 2022-08-12 | 苏州朗高智能科技有限公司 | Heater part fault detection device |
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