CN212646402U - Oil smoke detection device and oil smoke detection system - Google Patents
Oil smoke detection device and oil smoke detection system Download PDFInfo
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- CN212646402U CN212646402U CN202021345848.5U CN202021345848U CN212646402U CN 212646402 U CN212646402 U CN 212646402U CN 202021345848 U CN202021345848 U CN 202021345848U CN 212646402 U CN212646402 U CN 212646402U
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Abstract
The utility model provides an oil smoke detection device and an oil smoke detection system, which can realize the shunting of the detected airflow entering the oil smoke detection device by arranging a communicated air passage cavity at one side of an air chamber cavity, so that most of the detected airflow directly flows out of the oil smoke detection device through a main flow passage, and only part of the detected airflow enters an air inlet cavity of the air chamber cavity through an air inlet; the flow of the measured airflow entering the air chamber cavity can be reduced, the pollution of the measured airflow to the oil smoke detection sensor is reduced, the service life of the oil smoke detection device is prolonged, the measured airflow enters the air chamber cavity and can be prevented from being interfered by the fluctuation of the airflow of the exhaust pipeline, a more stable airflow environment than the exhaust pipeline is formed, and the technical effect of improving the oil smoke detection precision is achieved. The heating module is arranged in the air inlet cavity to heat the detected air flow, so that the influence of water vapor on the oil smoke detection precision is eliminated. The device can adapt to different flow working conditions, is resistant to high humidity and can be protected for a long time by using the sheath gas.
Description
Technical Field
The utility model relates to an oil smoke detects technical field, especially relates to an oil smoke detection device and oil smoke detecting system.
Background
The oil fume in the catering industry contains a large amount of particles, and if the oil fume is directly discharged into the atmosphere without being purified, the oil fume brings huge threats to the environmental protection and the health of people. Along with the continuous development and progress of society, people pay more and more attention to environmental protection, in order to slow down the huge threat that the catering trade oil smoke brought to environmental protection and people's health, environmental protection regulatory agency requires the catering trade to install the oil smoke clarifier additional to the particulate matter in the filtering oil smoke, and in order to guarantee the supervision effect, in many city regulatory agencies at the oil smoke discharge port of catering unit additional installed oil smoke granule detection device in order to monitor the oil smoke discharge concentration of catering unit.
At present, common oil smoke detection modes comprise a laser scattering method, an optical absorption method, a sound detection method and the like, and patent document CN104142288B discloses an oil smoke concentration detection device, which judges the oil smoke concentration by acquiring cooking sound and comparing a sound signal processed by an audio processing module with a reference oil smoke signal built in an oil smoke machine control module. It is difficult to distinguish cooking sounds from other kitchen noises, so it cannot accurately judge the concentration of soot, and it can measure only the concentration of soot inside a kitchen, not the concentration of soot discharged into the atmosphere.
In order to measure the concentration of oil smoke discharged to the atmosphere, patent document CN103969327A discloses an ultrasonic oil smoke concentration sensor, which includes a pair of ultrasonic transducers, a pressure sensor, a temperature sensor and a connecting rod, wherein an open oil smoke detection channel is formed between the two ultrasonic transducers, the oil smoke concentration is calculated according to the propagation speed of ultrasonic waves in oil smoke, although the sensitivity is high and the oil smoke adhesion can be resisted, the temperature and humidity in oil smoke are both high, and the ultrasonic signals are greatly interfered by temperature and humidity, so that the accuracy of the oil smoke detection result is low.
In order to eliminate the influence of interference of temperature and humidity on the measurement accuracy of oil smoke concentration, patent document CN101290282 discloses a device for measuring oil smoke concentration by optical absorption method, which places a light source emitting device and a photoelectric conversion device opposite to each other at the opening of an oil smoke chimney, so that oil smoke flows through the gap between the two devices; the light emitted by the light source emitting device reaches the photoelectric conversion device after being absorbed, reflected and refracted by the oil smoke; the photoelectric conversion device detects the concentration change of the oil smoke in real time according to the strength change of the detected optical signal. This scheme is with low costs, simple structure, but it is direct with light source emitter and photoelectric conversion device setting in the both sides of chimney opening, and output signal receives humidity and the influence of air current velocity of flow in the exhaust pipe great, and oil smoke detection precision is difficult to guarantee to receive the direct impact of high concentration oil flue gas stream for a long time, damage easily.
In order to prolong the service life of the oil smoke detection device and make the sampling airflow more stable, patent documents CN110906395A and CN210090256U both disclose methods of extracting the smoke flow of the oil to be detected by a fan, then mixing and diluting the extracted smoke flow of the oil to be detected and air or zero gas without oil smoke, and detecting the mixed airflow, although it can prevent the oil smoke detection device from being impacted by high-concentration oil smoke for a long time to a certain extent, prolong the service life of the oil smoke detection device, and is less affected by the flow rate of the airflow. But it needs to be used with a flow meter and a valve, resulting in poor reliability and high cost of the device.
Therefore, a lampblack detection device which is resistant to high humidity, capable of adapting to different flow working conditions, high in measurement accuracy and reliability and long in service life is needed in the market.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides an oil smoke detection device and oil smoke detecting system, can be shunted by the survey air current to most oil smoke, reduce the flow that enters into the survey air current in the air chamber cavity, the pollution of survey air current to the oil smoke detection sensor has been reduced, prolong oil smoke detection device's life-span, the survey air current enters the air chamber cavity, can avoid the undulant interference of exhaust pipe air current, form the air current environment more steady than the exhaust pipe, the oil smoke detection precision has been improved, utilize heating element and heat conduction module to heat the survey air current, eliminate the influence of the steam in the survey air current to the oil smoke detection precision, thereby reach the technological effect who improves the oil smoke detection precision.
In a first aspect, an embodiment of the present invention provides an oil smoke detection apparatus, including an air chamber cavity, an oil smoke detection sensor, and an air passage cavity;
the air chamber cavity is hollow and provided with an air inlet hole and an air outlet hole, and the oil smoke detection sensor is arranged in the air chamber cavity;
the air flue cavity is hollow and provided with an air inlet and an air outlet, a main flow channel is formed inside the air flue cavity, the air flue cavity and the air chamber cavity are communicated through the air inlet hole and the air outlet hole, the air inlet hole is used for shunting the measured air flow in the air flue cavity to the oil smoke detection sensor, and the air outlet hole is used for outputting the measured air flow detected by the oil smoke detection sensor to return to the air flue cavity.
The device also comprises a heating module which is used for heating the measured airflow entering the cavity of the air chamber.
The oil smoke detection sensor is characterized by further comprising a partition plate, wherein the partition plate is arranged in the air chamber cavity and divides the air chamber cavity into an air inlet cavity and an air outlet cavity, the air inlet cavity is communicated with the air inlet hole, the air outlet cavity is communicated with the air outlet hole, a through hole is formed in the partition plate in a penetrating mode, the air inlet cavity and the air outlet cavity are communicated through the through hole, and the oil smoke detection sensor is arranged in the air outlet cavity.
The heating module comprises a heating element and a heat conduction module;
the heat conduction module is arranged on the side edge of the air inlet cavity, the heating element is arranged between the heat conduction module and the side plate of the air chamber cavity, and heat emitted by the heating element is conducted to the air inlet cavity through the heat conduction module and used for heating a measured airflow entering the air inlet cavity.
The air inlet structure further comprises a separation strip, the separation strip is arranged in the air inlet cavity and abutted against two opposite side walls of the air inlet cavity, so that the air inlet cavity forms a U-shaped flow passage, one end of the U-shaped flow passage is communicated with the air inlet, and the other end of the U-shaped flow passage is communicated with the through hole.
The end part of the heat conduction module is abutted with the inner side wall of the air inlet cavity, the side wall of the heat conduction module is abutted with the separation strip, part of the heat conduction module is positioned at the upstream of the U-shaped flow channel, and the other part of the heat conduction module is positioned at the downstream of the U-shaped flow channel.
The air passage cavity is detachably connected with the air chamber cavity.
And a sealing foam is arranged between the air chamber cavity and the air passage cavity, the sealing foam is bonded on the air chamber cavity, and the positions of the sealing foam, which are opposite to the air inlet and the air outlet, are provided with through holes.
A second aspect, an embodiment of the utility model provides an oil smoke detecting system, include the aspiration pump and if the utility model discloses the first aspect oil smoke detecting device, the aspiration pump with oil smoke detecting device gas outlet links to each other.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the communicated air passage cavity is arranged on one side of the air chamber cavity, and the air passage cavity can divide most of the measured air flow entering the oil smoke detection device, so that most of the measured air flow directly flows out of the oil smoke detection device through the main flow passage, and only a part of the measured air flow enters the air inlet cavity of the air chamber cavity through the air inlet; the flow of the measured airflow entering the air chamber cavity can be reduced, the pollution of the measured airflow to the oil smoke detection sensor is reduced, the service life of the oil smoke detection device is prolonged, the measured airflow enters the air chamber cavity and can be prevented from being interfered by the fluctuation of the airflow of the exhaust pipeline, a more stable airflow environment than the exhaust pipeline is formed, and the oil smoke detection precision is improved. Through be equipped with heating element and heat conduction module at air inlet cavity, can heat by survey air current, eliminate the influence of the steam in the survey air current to oil smoke detection precision, can improve oil smoke detection precision. The sheath gas is used for long-term protection, and the service life of the oil smoke detection device is further prolonged.
Drawings
Fig. 1 is a schematic diagram of an explosion structure of an embodiment of the oil smoke detection device provided by the present invention;
FIG. 2 is a schematic partial exploded view of the smoke detection device of FIG. 1;
FIG. 3 is a schematic diagram of the structure of the chamber cavity and the airway cavity of FIG. 1;
FIG. 4 is a schematic view of the assembly of the smoke detection unit of FIG. 1;
FIG. 5 is a schematic view of the structure of the chamber cavity (with side plate removed) of FIG. 1;
fig. 6 is a schematic view showing the structure of the air passage chamber in fig. 1.
In the figure: 1-air chamber cavity, 11-air inlet hole, 12-air outlet hole, 13-air inlet cavity, 14-side plate, 2-air passage cavity, 21-air inlet, 22-air outlet, 23-main flow channel, 3-sealing foam, 31-perforation, 4-division plate, 41-through hole, 5-heating element, 6-heat conduction module, 7-division bar and 8-heat insulation cotton.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Example one
Referring to fig. 1 to 6, an embodiment of the present invention provides an oil smoke detection apparatus, including an air chamber cavity 1, a partition plate 4, a heating element 5, a heat conduction module 6, an oil smoke detection sensor, and an air passage cavity 2.
Referring to fig. 1 to 3, the air chamber 1 is hollow and has an air inlet 11 and an air outlet 12, the partition plate 4 is disposed in the air chamber 1 to partition the air chamber 1 into an air inlet 13 and an air outlet (not shown), the air inlet 13 is communicated with the air inlet 11, the air outlet is communicated with the air outlet 12, the partition plate 4 is provided with a through hole 41, and the air inlet 13 is communicated with the air outlet 41. The heat conduction module 6 is arranged on the side edge of the air inlet cavity 13, the heating element 5 is arranged between the heat conduction module 6 and the side plate 14 of the air chamber cavity 1, and heat emitted by the heating element 5 is conducted to the air inlet cavity 13 through the heat conduction module 6 so as to heat the detected air flow entering the air inlet cavity 13. The heat conducting module 6 can adopt a copper block heat conducting block, an aluminum block heat conducting block or a ceramic heat conducting block. The oil smoke detection sensor is disposed in the air outlet cavity, and in this embodiment, the oil smoke detection sensor is used for measuring the oil smoke concentration, but may also be used for measuring other gas parameters, which is not particularly limited.
The measured air current gets into air inlet cavity 13 from inlet port 11 after, with heat conduction module 6 contact, heating element 5 heats the measured air current through heat conduction module 6, can eliminate the steam that contains in the measured air current, and the rethread through-hole 41 reachs in giving vent to anger the cavity, and then by being located the interior oil smoke detection sensor collection detection of giving vent to anger the cavity. Because the oil smoke contains particulate matter and steam in fact, oil smoke detection sensor need detect the particulate matter, the laser irradiation of oil smoke detection sensor transmission all can produce the scattered light on particulate matter and steam, it can lead to oil smoke detection sensor to judge steam into the particulate matter by mistake to contain steam in the oil smoke, reduce the oil smoke and detect the precision, consequently, utilize heating element 5 to heat to being surveyed the air current, can eliminate the influence of the steam in being surveyed the air current to oil smoke concentration detection, thereby improve the oil smoke and detect the precision.
In order to sufficiently eliminate water vapor in the measured air flow, a separating strip 7 is arranged in the air inlet cavity 13, the separating strip 7 is abutted against two opposite side walls of the air inlet cavity 13, so that the air inlet cavity 13 forms a U-shaped flow channel (see fig. 5), one end of the U-shaped flow channel is communicated with the air inlet 11, and the other end of the U-shaped flow channel is communicated with the through hole 41. The measured air current gets into the back from inlet port 11, flows through the U-shaped runner and flows out from through-hole 41 again for the measured air current is full with heat conduction module 6 after contacting, flows out from through-hole 41 again, thereby avoids the measured air current to directly flow out from through-hole 41 after getting into from inlet port 11, and does not contact with heat conduction module 6, so set up, can increase the contact time of being surveyed air current and heat conduction module 6, improves the degree of eliminating the steam influence in the measured air current.
Referring to fig. 1 and 2, in order to install the heating element 5 and the heat conducting module 6 in the air chamber 1, the side plate 14 is detachably connected to the air chamber 1.
In this embodiment, the end of the heat conduction module 6 is abutted against the inner side wall of the air inlet cavity 13, the side wall of the heat conduction module 6 is abutted against the separation strip 7, the part of the heat conduction module 6 is located at the upstream of the U-shaped flow channel, and the other part of the heat conduction module is located at the downstream of the U-shaped flow channel, so that the measured air flow is always in contact with the heat conduction module 6 when flowing in the U-shaped flow channel, the time and the area of the contact between the measured air flow and the heat conduction module 6 can be increased, the efficiency of eliminating water vapor in the measured air flow is improved, and. The heat insulation cotton 8 is arranged between the heating element 5 and the inner side wall of the side plate 14 of the air chamber cavity, so that the side plate 14 of the air chamber cavity is prevented from being directly contacted with the heating element 5 and damaged.
Referring to fig. 4 and 6, the air passage cavity 2 is hollow and has an air inlet 21 and an air outlet 22, the air inlet 21 is used for being connected with an air pipe, and the air pipe is used for extending into the smoke exhaust pipeline, so that the oil smoke detection device in the smoke exhaust pipeline can be prevented from being directly impacted by high-concentration oil smoke gas flow for a long time, and the service life of the oil smoke detection device is prolonged.
Referring to fig. 6, a main flow passage 23 is formed inside the air passage cavity 2, the main flow passage 23 of the air passage cavity 2 is communicated with the air chamber cavity 3 through an air inlet hole 11 and an air outlet hole 12, the air inlet hole 11 is used for shunting the measured air flow in the air passage cavity 2 to the smoke detection sensor, and the air outlet hole 12 is used for outputting the measured air flow detected by the smoke detection sensor to return to the air passage cavity 2. After the measured airflow enters the air passage cavity 2 from the air inlet 21, part of the measured airflow directly flows out from the air outlet 22 through the main flow passage 23, and the other part of the measured airflow enters the air chamber cavity 1 through the air inlet 11, is collected and detected by the oil smoke detection sensor in the air chamber cavity 1, flows back to the air passage cavity 2 through the air outlet 12, and then flows out from the air outlet 22.
Because the exhaust fan in the exhaust pipe has great suction, the inside air current velocity of flow of exhaust pipe is higher and contain more steam usually, can cause the error to oil smoke detection device's measuring result, and the measured air current shunts in air flue cavity 2 for it is less to enter into the measured air current flow in the air chamber cavity 1, thereby makes the measured air current that oil smoke detection sensor detected more steady, improves oil smoke detection accuracy.
The inside wall of air flue cavity 2 is straight setting in the direction from air inlet 21 to air outlet 22, makes the measuring air current more steady to improve the oil smoke and detect the precision.
The air inlet 21 and the air outlet 22 are oppositely arranged and respectively arranged at two ends of the air passage cavity 2, so that the flow path of the measured airflow in the air passage cavity 2 is linear, the measured airflow is more stable, and the oil smoke detection precision is improved.
The sealing foam 3 is arranged between the air chamber cavity 1 and the air passage cavity 2, the sealing foam 3 is adhered to the air chamber cavity 1, and the positions of the sealing foam 3, which are opposite to the air inlet hole 11 and the air outlet hole 12, are provided with through holes 31 (see fig. 2), so that the sealing performance of the oil smoke detection device can be ensured, and large particle impurities in the detected air flow can be filtered.
Generally, the wind power of an exhaust fan in the smoke exhaust pipeline is large, the flow velocity of air flow in the smoke exhaust pipeline is high and contains more water vapor, and the too high flow velocity of air flow can influence the oil smoke detection sensor to collect the detected air flow, so that the detection result is influenced. The utility model provides a technical scheme, through the air flue cavity 2 that is equipped with the intercommunication in air chamber cavity 1 one side, most air current is direct to flow out oil smoke detection device through sprue 23, only partly air current enters into to air chamber cavity 1's air inlet cavity 13 through inlet port 11. The heating element 5 and the heat conduction module 6 are arranged in the air inlet cavity 13, so that the measured air flow can be heated, the influence of water vapor in the measured air flow on the oil smoke detection precision is eliminated, the measured air flow with the water vapor eliminated flows into the air inlet cavity 13 from the through hole 41, the oil smoke detection sensor in the air inlet cavity 13 samples and detects the oil smoke, the measured air flow flows back into the air passage cavity 2 from the air outlet 12 and flows out from the air outlet 22, the air passage cavity 2 divides most of the measured airflow entering the oil smoke detection device, so that the flow of the measured airflow entering the air chamber cavity 1 is reduced, the pollution of the measured airflow on an oil smoke detection sensor is reduced, the service life of the oil smoke detection device is prolonged, the measured airflow enters the air chamber cavity, the fluctuation interference of the airflow of the smoke exhaust pipeline can be avoided, a more stable airflow environment than the smoke exhaust pipeline is formed, and the oil smoke detection precision is improved.
The oil smoke concentration in the exhaust pipe is higher, the air current velocity of flow is big, if with oil smoke detection sensor direct exposure in the exhaust pipe, can cause the pollution to oil smoke detection sensor, through connect the trachea at air inlet 21, place the trachea in the exhaust pipe, air flue cavity 2 all can alleviate oil smoke detection sensor and pollute the degree to the reposition of redundant personnel effect of surveyed air current, can prolong oil smoke detection sensor's life-span.
In order to further prolong the service life of the oil smoke detection device, the oil smoke detection sensor uses a sheath flow structure as disclosed in the patent CN210293990U granted by me to carry out long-term protection on a light source and a detector of the oil smoke detection sensor.
Because the oil smoke in the survey air current has great adsorptivity, when the oil smoke granule in the survey air current is attached to the inside fan of oil smoke detection sensor, the resistance that leads to the fan to receive increases, the rotational speed of fan reduces, oil smoke detection sensor adopts like the rotational speed correction technique that I department authorizes patent CN104596904B and carries out the rotational speed and revise, in order to eliminate because the influence of fan rotational speed reduction to oil smoke concentration measurement accuracy, when the rotational speed of fan is less than a specified value, oil smoke detection sensor sends the police dispatch newspaper, remind the user to change or clear up oil smoke detection sensor.
Example two:
an embodiment of the utility model provides an oil smoke detecting system, including the aspiration pump and as the oil smoke detection device in embodiment one, the aspiration pump sets up with gas outlet 22 relatively, and usable aspiration pump is with the oil smoke from exhaust pipe suction to air flue cavity 2 in. Because the exhaust fan in the smoke exhaust pipeline has larger suction force, the air suction pump is added in the oil smoke detection system, the phenomenon that the sampling rate is too low due to insufficient suction force of the oil smoke detection device can be avoided, and the technical effect of ensuring normal sampling of the oil smoke detection system is achieved.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. A lampblack detection device is characterized by comprising an air chamber cavity, a lampblack detection sensor and an air passage cavity;
the air chamber cavity is hollow and provided with an air inlet hole and an air outlet hole, and the oil smoke detection sensor is arranged in the air chamber cavity;
the air flue cavity is hollow and provided with an air inlet and an air outlet, a main flow passage is formed inside the air flue cavity, the main flow passage of the air flue cavity and the air chamber cavity are communicated through the air inlet hole and the air outlet hole, the air inlet hole is used for shunting the detected air flow in the air flue cavity to the oil smoke detection sensor, and the air outlet hole is used for outputting the detected air flow detected by the oil smoke detection sensor to return to the air flue cavity.
2. The soot detecting device of claim 1, further comprising a heating module for heating the measured airflow entering the air chamber cavity.
3. The soot detecting device according to claim 2, further comprising a partition plate disposed in the air chamber cavity for partitioning the air chamber cavity into an inlet cavity and an outlet cavity, wherein the inlet cavity is communicated with the inlet hole, the outlet cavity is communicated with the outlet hole, the partition plate has a through hole formed therethrough, the inlet cavity and the outlet cavity are communicated through the through hole, and the soot detecting sensor is disposed in the outlet cavity.
4. The smoke detector of claim 3, wherein the heating module comprises a heating element and a heat conducting module;
the heat conduction module is arranged on the side edge of the air inlet cavity, the heating element is arranged between the heat conduction module and the side plate of the air chamber cavity, and heat emitted by the heating element is conducted to the air inlet cavity through the heat conduction module and used for heating a measured airflow entering the air inlet cavity.
5. The soot detecting device of claim 4, further comprising a separating strip, wherein the separating strip is disposed in the air inlet cavity and abuts against two opposite side walls of the air inlet cavity, so that the air inlet cavity forms a U-shaped flow channel, one end of the U-shaped flow channel is communicated with the air inlet, and the other end of the U-shaped flow channel is communicated with the through hole.
6. The soot detecting device of claim 5, wherein an end of the heat conducting module abuts against an inner sidewall of the air inlet cavity, wherein the sidewall of the heat conducting module abuts against the partition bar, and wherein a portion of the heat conducting module is located upstream of the U-shaped flow channel and another portion of the heat conducting module is located downstream of the U-shaped flow channel.
7. The soot detection device of claim 1, wherein the airway cavity is detachably connected to the air chamber cavity.
8. The soot detecting device of claim 1, wherein a sealing foam is disposed between the air chamber cavity and the air passage cavity, the sealing foam is bonded to the air chamber cavity, and a through hole is disposed at a position of the sealing foam opposite to the air inlet and the air outlet.
9. An oil smoke detection system, characterized by comprising an air pump and the oil smoke detection device according to any one of claims 1 to 8, wherein the air pump is connected with an air outlet of the oil smoke detection device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021345848.5U CN212646402U (en) | 2020-07-09 | 2020-07-09 | Oil smoke detection device and oil smoke detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021345848.5U CN212646402U (en) | 2020-07-09 | 2020-07-09 | Oil smoke detection device and oil smoke detection system |
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| CN212646402U true CN212646402U (en) | 2021-03-02 |
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| CN202021345848.5U Active CN212646402U (en) | 2020-07-09 | 2020-07-09 | Oil smoke detection device and oil smoke detection system |
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