CN215727678U - Refrigerant identification device - Google Patents
Refrigerant identification device Download PDFInfo
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- CN215727678U CN215727678U CN202122215810.7U CN202122215810U CN215727678U CN 215727678 U CN215727678 U CN 215727678U CN 202122215810 U CN202122215810 U CN 202122215810U CN 215727678 U CN215727678 U CN 215727678U
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Abstract
The utility model discloses a refrigerant identification device, which comprises an air chamber and a signal processing module, wherein the air chamber is provided with an air inlet and an air outlet, an infrared light source and an infrared detector are arranged in the air chamber, and the infrared light source and the infrared detector are both connected with the signal processing module; the air chamber comprises at least two light path channels, adjacent light path channels are communicated through the reflecting seat, the infrared light source and the infrared detector are located in different light path channels, and light emitted by the infrared light source reaches the infrared detector after being reflected by the reflecting seat. According to the utility model, the air chamber is arranged into a structure that a plurality of light path channels are communicated through the reflecting seat, so that the light path length of infrared light during detection is prolonged, the detection error of refrigerant purity is reduced, and the detection accuracy is improved.
Description
Technical Field
The utility model belongs to the technical field of refrigerant identification, and particularly relates to a refrigerant identification device.
Background
The refrigerant is a substance used for transferring heat energy and generating a refrigeration effect in an air conditioning system, and is mainly applied to the field of automobile air conditioners, commonly used automobile air conditioning refrigerants include R134a, R22, R32 and the like, more environment-friendly R1234yf appears in recent years, the refrigerants in the current market are various, but different refrigerants cannot be mixed, otherwise, the automobile air conditioner is damaged; meanwhile, due to the fact that the refining cost of the refrigerant is high, the purity of the refrigerant in the market is insufficient, the quality of the refrigerant is uneven, and therefore the detection of the components and the purity of the refrigerant is very necessary for the maintenance of the automobile air conditioner.
The refrigerant identification device is mainly used for identifying the components of refrigerants used in the automobile air conditioner and performing operations such as automobile air conditioner maintenance, refrigerant filling, recovery and the like according to identification results, but the existing refrigerant identification device has the following defects: 1. the air chamber light path of the existing refrigerant identification device is of a direct correlation type, the light path is short, the precision is not high 2, the existing refrigerant identification device is mostly a foreign product, the price is high, only a single refrigerant component can be analyzed, multiple refrigerant components 3 cannot be identified, the internal structure of the existing refrigerant identification device is an aluminum alloy, the reflectivity of the aluminum alloy surface to light can be reduced when the refrigerant is introduced for a long time, and then the detection precision of the refrigerant identification device is reduced.
Therefore, there is a need for a refrigerant identification device capable of simultaneously detecting a plurality of components and having a more accurate detection result.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model discloses a refrigerant identification device which can simultaneously detect various refrigerant components and has higher detection precision, and the following technical scheme is adopted:
a refrigerant identification device comprises an air chamber and a signal processing module, wherein an air inlet and an air outlet are formed in the air chamber, an infrared light source and an infrared detector are arranged in the air chamber, and the infrared light source and the infrared detector are both connected with the signal processing module;
the air chamber includes two at least light path passageways, communicates through the reflection seat between the adjacent light path passageway, infrared source and infrared detector are located the light path passageway of difference, the light that infrared source sent arrives after the reflection of reflection seat infrared detector.
Further, the infrared detector comprises a reference channel and a detection channel,
the number of the reference channels is one or more, and a reference optical filter is arranged in each reference channel;
the detection channel is provided with a plurality of detection optical filters.
Further, in the above-mentioned case,
the light transmission wavelength of the reference filter is 3.8-4.0 μm;
the transmission wavelengths of the detection filters in the detection channels are different.
Further, the gas chamber comprises a first light path channel and a second light path channel which are arranged side by side,
the infrared light source is arranged at one end, far away from the reflection seat, of the first light path channel, and the infrared detector is arranged at one end, far away from the reflection seat, of the second light path channel.
Furthermore, the included angles of the inner wall of the reflection seat and the joint of the first light path channel and the second light path channel are all 130-140 degrees.
Further, in the above-mentioned case,
also comprises a mounting seat, the mounting seat comprises a first seat body structure, a second seat body structure and a third seat body structure,
a first limiting piece is arranged in the first seat body structure, the infrared light source is arranged in the first limiting piece, and a first infrared transmission window sheet is covered on the first limiting piece;
a second limiting piece is arranged in the second seat body structure, the infrared detector is arranged in the second limiting piece, and a second infrared transmission window sheet is covered on the second limiting piece;
the third seat structure is used for fixing the first light path channel and the second light path channel.
Furthermore, the inner wall of the air chamber is made of gold-plated materials.
Further, a filter element is arranged at the air inlet.
Further, a pressure sensor is further arranged on the air chamber and connected with the signal processing module.
And the display storage module and the voice alarm module are both connected with the signal processing module.
By adopting the technical scheme, the utility model has the beneficial effects that:
1) according to the utility model, the air chamber is arranged into a structure that a plurality of light path channels are communicated through the reflecting seat, so that the light path length of infrared light during detection is prolonged, the detection error of refrigerant purity is reduced, and the detection accuracy is improved.
2) The infrared detector is arranged in a multi-channel mode, so that various refrigerant gases can be detected simultaneously, and the requirement for identifying various refrigerant components is met.
3) The inner wall of the air chamber is made of gold-plated materials, the chemical property is stable, the surface cannot be chemically changed after long-term use, the stability of the refrigerant identification device can be improved, meanwhile, the reflectivity of infrared light can be improved after gold plating, the light energy received by the infrared detector is stronger, and the precision of the refrigerant identification device is improved.
Drawings
FIG. 1 is a cross-sectional view of a refrigerant identification device according to an embodiment of the present invention
FIG. 2 is an enlarged view of a portion A in FIG. 1
FIG. 3 is a schematic diagram of a light reflection path according to an embodiment of the present invention
Wherein, 1-air chamber, 101-first light path channel, 102-second light path channel, 103-reflection seat, 2-signal processing module, 3-air inlet, 301-filter element, 4-air outlet, 5-infrared light source, 6-infrared detector, 601-reference channel, 602-detection channel, 7-pressure sensor, 8-first seat structure, 801-first limiting piece, 802-first threaded fastener, 803-first sealing ring, 804-first infrared transmission window piece, 9-second seat structure, 901-second limiting piece, 902-second threaded fastener, 903-second sealing ring, 904-second infrared transmission window piece, 10-third threaded fastener, 11-third sealing ring, 12-fourth threaded fastener, 103-reflection seat, 3-air inlet, 301-filter element, 4-air outlet, 5-infrared light source, 3-infrared detector, 601-reference channel, 602-detection channel, 7-pressure sensor, 8-first seat structure, 801-first limiting piece, 802-first threaded fastener, 803-second threaded fastener, 904-second infrared transmission window piece, 10-third threaded fastener, 11-third sealing ring, 12-fourth threaded fastener, 3-second seat structure, and 3-second seat structure, 13-fourth sealing ring, 14-metal bracket and 15-fifth threaded fastener.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model discloses a refrigerant identification device, which comprises a gas chamber 1 and a signal processing module 2, wherein the gas chamber 1 is provided with a gas inlet 3 and a gas outlet 4, preferably, the gas inlet 3 and the gas outlet 4 are arranged at two side ends of the gas chamber 1, so that detection gas is ensured to enter from the gas inlet 3 and to fill the whole gas chamber after flowing out from the gas outlet 4, an infrared light source 5 and an infrared detector 6 are arranged in the gas chamber 1, and the infrared light source 5 and the infrared detector 6 are both connected with the signal processing module 2; air chamber 1 includes a plurality of light path passageway, communicates through reflection seat 103 between the adjacent light path passageway, infrared light source 5 and infrared detector 6 are located the light path passageway of difference, the light that infrared light source 5 sent arrives after reflecting through reflection seat 103 the infrared detector 6.
According to the utility model, the air chamber is arranged into a structure that a plurality of light path channels are communicated through the reflecting seat, so that light rays emitted by the infrared light source pass through the first light path channel, are reflected by the first reflecting seat to enter the next light path channel, and are reflected by the next reflecting seat, and the steps are repeated until the light rays in the last light path channel are received by the infrared detector, namely the air chamber is a 'reflection-type air chamber'.
The air chamber of the existing refrigerant identification device is usually a rectangular air chamber, and the infrared light source and the infrared detector are respectively arranged on the side walls of the symmetrical air chamber, so that infrared light emitted by the infrared light source is directly irradiated on the infrared detector, namely the air chamber is a 'correlation type air chamber'.
Compared with the conventional correlation type air chamber, the reflection type air chamber has the advantages that under the condition that the space occupied by the air chamber is the same, the optical path of infrared light in the air chamber is longer, according to Lambert-beer's law, A is Kbc, when the whole air chamber is filled with refrigerant gas, the absorption amount of the refrigerant gas to the infrared light is higher under the condition that the optical path is longer, namely, the absorbance A is higher, so that the numerical error of the finally detected concentration C of the refrigerant is smaller, and the detection accuracy is higher.
Therefore, the reflection-type air chamber can reduce the detection error of the refrigerant concentration, improve the detection accuracy, and simultaneously can further reduce the volume of the air chamber through the arrangement of a plurality of optical path channels, thereby meeting the portable requirement of the refrigerant identification device.
In a preferred embodiment of the present invention, as shown in fig. 2, the infrared detector 6 includes a reference channel 601 and a detection channel 602, where the reference channel 601 is used to cancel an interference signal caused by an interference factor such as a temperature change, and further ensure accuracy of a detection result, the reference channel 601 is one or more (only 1 is shown in the figure, and a plurality of reference channels may also be provided according to a detection requirement, and herein is not limited), and a reference filter is disposed in the reference channel 601; the detection channels 602 are provided with detection optical filters, multiple refrigerant components can be detected simultaneously by arranging the detection channels, the requirement for identifying the multiple refrigerant components is met, multiple groups of data can be acquired for the same refrigerant component, and the accuracy of detection results is guaranteed.
The infrared absorption wave band of common refrigerants in the market is almost 2-16 um, so the wavelength range of the infrared light source 5 can be selected to be 2-16 um according to the infrared absorption characteristic of the refrigerants.
Correspondingly, in a preferred embodiment of the present invention, the transmission wavelength of the reference filter in the reference channel 601 is between 3.8 μm and 4.0 μm, preferably 3.9 μm, the wavelength of the reference filter is also selected according to the light absorption characteristics of the refrigerant, and almost all the refrigerants do not absorb infrared light at the wavelength of 3.9 μm, so that when the transmission wavelength of the reference filter is 3.9 μm, reference can be made for the detection of all the refrigerants, and the detection effect is most accurate.
Furthermore, in a preferred embodiment of the present invention, the light transmission wavelengths of the detection filters of the plurality of detection channels 602 are all different to meet the requirement of detecting multiple refrigerant components, each refrigerant has a plurality of absorption bands, and by selecting the unique absorption wavelength of each refrigerant as the light transmission wavelength of the detection filter, multiple refrigerant components can be detected simultaneously. The detecting channels 602 may be disposed as required, for example, as shown in fig. 2, 3 detecting channels 602 may be provided, and may detect 3 refrigerant components simultaneously.
The infrared light source 5 can be a mems infrared light source, the infrared detector 6 can be a pyroelectric detector, the refrigerant identification device of the utility model is based on the non-spectroscopic infrared principle, a multichannel pyroelectric detector is used for sensing the absorption amount of the refrigerant to infrared light, the infrared light source 5 emits infrared light, the absorption characteristics are selected by utilizing the near infrared spectrum of different refrigerant molecules, different optical filters are selected, and the components and the purity of the refrigerant are identified according to the absorption amount of the refrigerant to the infrared light.
In a preferred embodiment of the present invention, as shown in fig. 1, the gas chamber 1 includes a first light path channel 101 and a second light path channel 102 arranged side by side, the infrared light source 5 is arranged at an end of the first light path channel 101 away from the reflector base 103, and the infrared detector 6 is arranged at an end of the second light path channel 102 away from the reflector base 103.
When the number of the light path channels is large, the accuracy of the detection result is also affected after the infrared light is reflected for multiple times, so that two light path channels are preferably arranged to ensure the detection accuracy.
Further, the included angles between the inner wall of the reflection seat 103 and the joints of the first light path channel 101 and the second light path channel 102 are both 130 degrees to 140 degrees, and preferably 135 degrees. When the infrared light source 5 is disposed at one end of the first light path channel 101 far from the reflection seat 103, the infrared detector 6 is disposed at one end of the second light path channel 102 far from the reflection seat 103, and included angles between inner walls of the reflection seat 103 and joints of the first light path channel 101 and the second light path channel 102 are 135 degrees, infrared light emitted by the infrared light source 5 can be reflected by the reflection seat 103 and then perpendicularly enter the infrared detector 6, as shown in fig. 3, fig. 3 shows a reflection path of one of the incident light, when the infrared light is perpendicularly reflected into the infrared detector 6, the infrared detector 6 has the best infrared light receiving effect, and the detection result is the most accurate.
In an embodiment of the present invention, as shown in fig. 1 and fig. 2, the refrigerant identification device further includes a mounting base, the mounting base includes a first base structure 8, a second base structure 9 and a third base structure, and the first base structure 8, the second base structure 9 and the third base structure may be integrally formed. Be provided with first locating part 801 in the first pedestal structure 8, infrared source 5 sets up in first locating part 801, first locating part 801 coats and is stamped first infrared transmission window piece 804, can fix first infrared transmission window piece 804 on first pedestal structure 8 through first threaded fastener 802, and first threaded fastener 802 front end still is provided with first sealing member 803 simultaneously, guarantees the gas tightness, prevents that the gaseous entering infrared source 5 department of detection from influencing the testing result.
A second limiting part 901 is arranged in the second seat structure 9, the infrared detector 6 is arranged in the second limiting part 901, a second infrared transmission window 904 covers the second limiting part 901, the second infrared transmission window 904 can be fixed on the second seat structure 9 through a second threaded fastener 902, and meanwhile, a second sealing element 903 is further arranged at the front end of the second threaded fastener 902 to ensure air tightness and prevent detection gas from entering the infrared detector 6 to affect a detection result.
The third seat structure is used for fixing the first light path channel 101 and the second light path channel 102, the first light path channel 101 and the second light path channel 102 can be fixed on the third seat structure through a third threaded fastener 10, and a third sealing ring 11 is arranged on the third threaded fastener 10 to prevent the detection gas in the gas chamber 1 from escaping from the third threaded fastener 10.
Furthermore, the first light path channel 101 and the second light path channel 102 can be fixed on the reflection seat 103 through the fourth threaded fastener 12, that is, the reflection seat 103 is communicated with the first light path channel 101 and the second light path channel 102, and the fourth threaded fastener 12 is provided with the fourth sealing ring 13 to prevent the detection gas in the gas chamber 1 from escaping from the fourth threaded fastener 12.
That is, the first light path channel 101, the second light path channel 102, the infrared light source 5 and the infrared detector 6 are fixed together by the reflection seat 103 and the mounting seat arranged at one end far away from the reflection seat 103, so that the stability of the structure of the air chamber 1 is ensured.
In an embodiment of the present invention, as shown in fig. 1, the present invention further includes a metal frame 14, and the metal frame 14 is connected to the signal processing module 2 through a fifth threaded fastener 15, and is also connected to the air chamber 1 and the mounting base through screws, etc. to ensure stability of the overall structure.
In a preferred embodiment of the present invention, the inner wall of the gas chamber 1 is made of gold-plated material (i.e., the inner wall of the optical path channel and the inner wall of the reflection seat 103 are made of gold-plated material), the gold has stable chemical properties, the surface does not undergo chemical changes after long-term use, the stability of the refrigerant identification device can be improved, and the reflectivity of infrared light can be improved after gold-plating, so that the light energy received by the infrared detector 6 is stronger, and the accuracy of the refrigerant identification device is improved.
In a preferred embodiment of the present invention, the air inlet 3 is provided with the filter element 301, the refrigerant stored in the vehicle air conditioner and the refrigerant tank may retain a little oil stain, the oil stain may enter the refrigerant identification device to cause the instrument to fail, the filter element 301 is provided at the air inlet 3 to filter impurities in the refrigerant, thereby avoiding polluting the air chamber and causing the refrigerant identification device to fail, the filter element 301 may be made of PTFE polytetrafluoroethylene material, and the material has stable property, high strength and long service time.
In an embodiment of the present invention, as shown in fig. 1, a pressure sensor 7 is further disposed on the gas chamber 1, and the pressure sensor 7 is connected to the signal processing module 2 to detect the pressure of the detection gas introduced into the gas chamber 1 in real time.
In an embodiment of the present invention, the refrigerant identification device further includes a display storage module and a voice alarm module, and both the display storage module and the voice alarm module are connected to the signal processing module 2. The system is used for displaying and storing the identification result of the refrigerant in real time, and can also give an alarm in real time when the conditions such as refrigerant purity not reaching the standard occur, thereby being more convenient to use.
In an embodiment of the present invention, the signal processing module 2 includes a signal processing circuit board, and the signal processing circuit board is provided with a light source modulation circuit, a detector signal acquisition circuit, an analog-to-digital conversion circuit, a microprocessor signal processing circuit, a signal output circuit, and a display and storage circuit. The circuits are conventional circuits in the prior art, and the light source modulation circuit is used for controlling the working power and frequency of the infrared light source; the detector signal acquisition circuit is used for acquiring a plurality of paths of signals output by the detector without distortion; the analog-to-digital conversion circuit is used for converting the acquired detector analog signals into digital signals; the microprocessor signal processing circuit is used for carrying out software processing on the digital signal of the detector and analyzing the refrigerant composition and purity; the signal output circuit is used for carrying out digital or analog output on the refrigerant identification result, and the output modes comprise RS485, RS232, IIC, analog current/voltage output and the like. The display circuit is used for displaying the components and the purity of the identified refrigerant, and the refrigerant identification device is provided with a memory for storing historical data of refrigerant identification.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art may still modify the technical solutions described in the foregoing embodiments, or may equally substitute some or all of the technical features; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The refrigerant identification device comprises an air chamber and a signal processing module, and is characterized in that:
the air chamber is provided with an air inlet and an air outlet, an infrared light source and an infrared detector are arranged in the air chamber, and the infrared light source and the infrared detector are both connected with the signal processing module;
the air chamber includes two at least light path passageways, communicates through the reflection seat between the adjacent light path passageway, infrared source and infrared detector are located the light path passageway of difference, the light that infrared source sent arrives after the reflection of reflection seat infrared detector.
2. The refrigerant identification device according to claim 1, wherein: the infrared detector comprises a reference channel and a detection channel,
the number of the reference channels is one or more, and a reference optical filter is arranged in each reference channel;
the detection channel is provided with a plurality of detection optical filters.
3. The refrigerant identification device according to claim 2, wherein:
the light transmission wavelength of the reference filter is between 3.8 and 4.0 mu m;
the transmission wavelengths of the detection filters in the detection channels are different.
4. The refrigerant identification device according to claim 1, wherein: the gas chamber comprises a first light path channel and a second light path channel which are arranged side by side,
the infrared light source is arranged at one end, far away from the reflection seat, of the first light path channel, and the infrared detector is arranged at one end, far away from the reflection seat, of the second light path channel.
5. The refrigerant identification device according to claim 4, wherein: the included angles of the inner wall of the reflection seat and the joint of the first light path channel and the second light path channel are all between 130 and 140 degrees.
6. The refrigerant identification device according to claim 4, wherein:
also comprises a mounting seat, the mounting seat comprises a first seat body structure, a second seat body structure and a third seat body structure,
a first limiting piece is arranged in the first seat body structure, the infrared light source is arranged in the first limiting piece, and a first infrared transmission window sheet is covered on the first limiting piece;
a second limiting piece is arranged in the second seat body structure, the infrared detector is arranged in the second limiting piece, and a second infrared transmission window sheet is covered on the second limiting piece;
the third seat structure is used for fixing the first light path channel and the second light path channel.
7. The refrigerant identification device according to claim 1, wherein: the inner wall of the air chamber is made of gold-plated materials.
8. The refrigerant identification device according to claim 1, wherein: and a filter element is arranged at the air inlet.
9. The refrigerant identification device according to claim 1, wherein: the air chamber is also provided with a pressure sensor, and the pressure sensor is connected with the signal processing module.
10. The refrigerant identification device according to claim 1, wherein: the display and storage module and the voice alarm module are both connected with the signal processing module.
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| CN202122215810.7U CN215727678U (en) | 2021-09-14 | 2021-09-14 | Refrigerant identification device |
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| CN202122215810.7U CN215727678U (en) | 2021-09-14 | 2021-09-14 | Refrigerant identification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116025999A (en) * | 2023-01-28 | 2023-04-28 | 宁波奥克斯电气股份有限公司 | Air conditioner and refrigerant leakage detection method |
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2021
- 2021-09-14 CN CN202122215810.7U patent/CN215727678U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116025999A (en) * | 2023-01-28 | 2023-04-28 | 宁波奥克斯电气股份有限公司 | Air conditioner and refrigerant leakage detection method |
| CN116025999B (en) * | 2023-01-28 | 2024-06-11 | 宁波奥克斯电气股份有限公司 | Air conditioner and refrigerant leakage detection method |
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