Food freshness degree detector with double detection functions

Abstract

The utility model provides a food freshness degree detector with a dual detection function, which comprises a shell provided with an air outlet; the pump body is arranged in the shell, the pump body is provided with an air inlet used for being communicated with a to-be-tested environment, and the air outlet is communicated with the pump body; the tray is detachably connected to the shell and is used for mounting test paper; the gas sensor is arranged in the shell; the display screen is arranged on the shell; and the control panel is arranged in the shell, and the control panel is electrically connected to the pump body, the display screen and the gas sensor. The detector can detect the concentration of the gas to be detected in the shell through the test paper and the gas sensor, namely, the detector adopts dual detection; moreover, the concentration of the to-be-detected gas can be intuitively judged through the color change of the test paper, and the concentration of the to-be-detected gas is displayed through the display screen, so that the concentration of the to-be-detected gas is subjected to dual verification and judgment, and the detection reliability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection instruments, in particular to a food freshness detector with dual detection functions. Background Art

[0002] Statistics show that a large amount of food is wasted worldwide each year due to spoilage, which not only burdens the environment but also has a negative impact on the economy. Furthermore, the health risks posed by food spoilage cannot be ignored. Consuming spoiled food can lead to health problems such as food poisoning. Therefore, timely detection and prevention of food spoilage are crucial. If microorganisms are present in food, they will decompose the food over time. Their activity releases CO2 gas, and the CO2 concentration increases with time. By monitoring the CO2 content in the food storage environment, the degree of microbial contamination in the food can be monitored in real time and appropriate measures can be taken.

[0003] In related technologies, CO2 concentration detection instruments generally use industrial sensors, primarily used in larger locations or spaces to detect CO2 concentrations in their environments, such as farms and vegetable greenhouses. Most of these devices are used in specialized industrial fields. The sensors used are large and have a long response time, typically taking 2-3 minutes for data to stabilize. These sensors are not suitable for applications requiring long-term CO2 concentration monitoring, such as vegetable greenhouses and indoor environments. When sensors fail or data deviations are significant, it is difficult to accurately determine the reliability of the measurement data. Furthermore, instrument calibration can only be performed at a testing agency. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a food freshness detector with dual detection functions, aiming to solve the problem of poor reliability of measurement data of CO2 concentration detection instruments in related technologies.

[0005] In order to solve the above technical problems, the present invention provides a food freshness detector with dual detection functions, comprising:

[0006] a housing having an air outlet;

[0007] A pump body is disposed in the housing, the pump body is provided with an air inlet for communicating with the environment to be measured, and the air outlet is connected to the pump body;

[0008] a tray, detachably connected to the housing, the tray being used to mount a test paper, the test paper being used to detect the concentration of the gas to be tested in the housing;

[0009] a gas sensor disposed in the housing, the gas sensor being used to detect the concentration of the gas to be measured in the housing; and

[0010] a display screen disposed on the shell; and

[0011] a control board disposed in the shell, the control board being electrically connected to the pump body, the display screen and the gas sensor.

[0012] Optionally, the shell is provided with a socket, and the tray is connected to the socket in a plug-in manner.

[0013] Optionally, the tray comprises:

[0014] a plug-in portion connected to the socket in a plug-in manner;

[0015] a supporting portion disposed on the plug-in portion; and

[0016] a clamping portion disposed on the supporting portion, a clamping gap being provided between the clamping portion and the supporting portion, the clamping gap being used for fixing the test paper.

[0017] Optionally, the food freshness detector with double detection functions further comprises a box body disposed in the shell, the box body being provided with a first air passing hole and a second air passing hole, the first air passing hole being communicated with the pump body, and the second air passing hole being communicated with the first air passing hole and the air outlet respectively.

[0018] When the plug-in portion is inserted into the socket, the supporting portion extends into the box body.

[0019] Optionally, the box body is provided with a transparent area, and the shell is provided with a window disposed opposite to the transparent area.

[0020] When the plug-in portion is inserted into the socket, the supporting portion is disposed opposite to the transparent area.

[0021] Optionally, the surface of the shell is provided with a recessed groove, and the recessed groove is communicated with the socket.

[0022] Optionally, the food freshness detector with double detection functions further comprises a needle member, the needle member being disposed on the shell, and the needle member being provided with an air inlet channel communicated with the air inlet.

[0023] Optionally, the food freshness detector with double detection functions further comprises a cap, the cap being detachably connected to the shell, and the cap being used for covering the needle member.

[0024] Optionally, the food freshness detector with double detection functions further comprises:

[0025] a control panel disposed in the housing, the control panel being electrically connected to the pump body, the display screen, and the gas sensor;

[0026] a switch assembly, disposed on a surface of the housing, the switch assembly being electrically connected to the control board; and

[0027] A power supply is disposed in the housing, and the power supply is electrically connected to the pump body, the display screen, the gas sensor, the switch assembly, and the control board.

[0028] Optionally, a communication module is provided on the control board.

[0029] Compared with the related art, the food freshness detector with dual detection function in the utility model has the following beneficial effects: the pump body can extract the gas to be tested in the test environment into the outer shell, and by installing the test paper on the tray, the detector can detect the concentration of the gas to be tested in the outer shell through the test paper and the gas sensor, that is, the detector adopts dual detection; moreover, the concentration of the gas to be tested can be intuitively judged by the color change of the test paper, and the concentration of the gas to be tested can be displayed on the display screen, thereby performing dual verification and judgment on the concentration of the gas to be tested, which greatly improves the reliability of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of the overall structure of a food freshness detector with dual detection functions provided by an embodiment of the present invention;

[0032] Figure 2 This is an exploded view of a food freshness detector with dual detection functions provided by an embodiment of the present utility model;

[0033] Figure 3 This is a partial structural diagram of a food freshness detector with dual detection functions provided by an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the states of the test paper provided by the embodiment of the present invention, in which the colors correspond to different concentrations of carbon dioxide.

[0035] In the accompanying drawings, the reference numerals represent: 1. outer shell; 11. bottom shell; 111. air outlet; 12. upper cover; 121. socket; 122. clearance groove; 2. pump body; 3. tray; 31. plug-in part; 32. support part; 33. clamping part; 4. gas sensor; 5. box body; 51. bottom cover; 511. first air hole; 512. second air hole; 513. clearance hole; 52. cover plate; 6. needle-piercing part; 61. needle tube; 62. syringe; 7. cap; 8. control panel; 9. switch assembly; 91. power switch; 92. start switch; 10. power supply. DETAILED DESCRIPTION

[0036] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0039] Example:

[0040] Traditional food preservation methods, such as refrigeration and vacuum packaging, have extended the shelf life of food to a certain extent. However, people often judge food's edibility through subjective methods such as direct observation, smell, and tasting. These methods can only provide a qualitative and general assessment, and the results vary from person to person, making it impossible to accurately and quantitatively determine food freshness and spoilage. Laboratory testing is time-consuming, labor-intensive, expensive, and incapable of instant detection, making it inconvenient to determine food freshness. With technological advancements, miniaturized sensors have begun to emerge, providing a new solution for portable food freshness detection.

[0041] Normally, the carbon dioxide content in the atmosphere is between 0.03% and 0.04% of the total volume of the atmosphere. The standard value of carbon dioxide in indoor environments should be less than 0.10% (1000PPM) to maintain good air quality. In public places for sleeping and resting, the indoor carbon dioxide concentration should not exceed 0.1%, and in other places, the indoor carbon dioxide concentration should not exceed 0.15%. The proportion of carbon dioxide in human exhaled gas is about 4%. Tests have found that under normal circumstances, if the carbon dioxide content in the storage environment is between 1-6%, it means that the physical object has been contaminated by microorganisms. The higher the concentration, the more serious the contamination. When it exceeds 7%, the food has already deteriorated.

[0042] See also Figure 1 、 Figure 2 and Figure 3 The present invention provides a food freshness detector with dual detection functions, comprising a housing 1, a pump body 2, a tray 3, a gas sensor 4, a display screen, and a control panel 8. The housing 1 is provided with an air outlet 111; the pump body 2 is disposed within the housing 1 and is provided with an air inlet for communicating with the environment to be tested, with the air outlet 111 communicating with the pump body 2; the tray 3 is detachably connected to the housing 1 and is used to mount a test paper, which is used to detect the concentration of the gas to be tested within the housing 1; the gas sensor 4 is disposed within the housing 1 and is used to detect the concentration of the gas to be tested within the housing 1; the display screen is disposed within the housing 1; and the control panel 8 is disposed within the housing 1 and is electrically connected to the pump body 2, the display screen, and the gas sensor 4.

[0043] The pump body 2 can draw the gas to be tested in the test environment into the shell 1. By installing the test paper on the tray 3, the detector can detect the concentration of the gas to be tested in the shell 1 through the test paper and the gas sensor 4, that is, the detector adopts double detection; moreover, the concentration of the gas to be tested can be intuitively judged by the color change of the test paper, and the concentration of the gas to be tested can be displayed on the display screen, thereby performing double verification and judgment on the concentration of the gas to be tested, which greatly improves the reliability of the detection.

[0044] It should be noted that the pump body 2 can be an air pump, a micro fan, etc. When the pump body 2 draws the gas to be tested in the test environment into the housing 1, the gas to be tested enters the housing 1 from the air inlet, and the gas to be tested in the housing 1 is discharged to the outside of the housing 1 through the air outlet 111. The test environment can be a refrigerator or a vacuum package, etc., and the gas to be tested can be carbon dioxide, such as Figure 4 As shown, when carbon dioxide passes through the test paper, the color of the test paper changes, and the color of the test paper changes with different carbon dioxide concentrations. When air passes through the test paper again, the test paper returns to its original color, making the test paper reusable. Moreover, because the test paper is mounted on a tray 3 that is detachably connected to the housing 1, the test paper can be removed and replaced. The detector can be used not only to test food freshness but also to detect carbon dioxide concentration in confined spaces such as farms to ensure safety, or for spot checks during food transportation and food safety inspections.

[0045] See also Figure 2 and Figure 3 In some embodiments, the tray 3 and the housing 1 can be detachably connected by a plug-in connection. For example, the housing 1 has a socket 121, and the tray 3 is plugged into the socket 121, which is a simple connection method. Alternatively, the tray 3 and the housing 1 can be detachably connected by a snap-fit ​​connection, a screw connection, a threaded connection, etc.

[0046] See also Figure 2 and Figure 3 In a specific example, the tray 3 is plugged into the housing 1, and the tray 3 includes a plug-in portion 31, a support portion 32, and a clamping portion 33. The plug-in portion 31 is plugged into the socket 121 to achieve a detachable connection between the tray 3 and the housing 1. The support portion 32 is provided on the plug-in portion 31, and the support portion 32 can support the test paper; the clamping portion 33 is provided on the support portion 32, and a clamping gap is provided between the clamping portion 33 and the support portion 32, and the clamping gap is used to fix the test paper, thereby fixing the test paper on the support portion 32. According to actual needs, the plug-in portion 31 and the support portion 32 can form a drawer structure, the support portion 32 is plate-shaped, and the clamping portion 33 can be L-shaped. There can be multiple clamping portions 33, for example, four, and the four clamping portions 33 are respectively provided at the four corners of the support portion 32. The four corners of the test paper are respectively clamped in the four clamping gaps to be fixed to the tray 3.

[0047] See also Figure 2 and Figure 3The food freshness tester with dual detection functions also includes a box body 5 disposed within the housing 1. The box body 5 is provided with a first air hole 511 and a second air hole 512, respectively located at opposite ends of the box body 5. The first air hole 511 communicates with the pump body 2, and the second air hole 512 communicates with the first air hole 511 and the air outlet 111. The gas to be tested, drawn by the pump body 2, enters the box body 5 through the first air hole 511, flows out of the box body 5 through the second air hole 512, and finally flows out of the housing 1 through the air outlet 111. When the plug portion 31 is inserted into the socket 121, the support portion 32 extends into the box body 5, thereby bringing the test paper fixed to the support portion 32 into the box body 5, completing the concentration test of the gas to be tested.

[0048] See also Figure 2 and Figure 3 The box body 5 includes a bottom cover 51 and a cover plate 52. A first air hole 511 and a second air hole 512 are respectively provided at both ends of the bottom cover 51. The pump body 2 is connected to the first air hole 511 via an air pipe. The cover plate 52 is fixed to the bottom cover 51 and encloses an air storage chamber with the bottom cover 51. The gas to be tested extracted by the pump body 2 is temporarily stored in the air storage chamber. A clearance hole 513 is provided on one side of the bottom cover 51, which is arranged opposite the socket 121. When the plug-in portion 31 of the tray 3 is inserted into the socket 121, the support portion 32 passes through the clearance hole 513 and extends into the air storage chamber. The test paper in the air storage chamber detects the concentration of the gas to be tested. The gas sensor 4 is mounted on the control board 8 and is located in the air storage chamber. The gas sensor 4 and the test paper are respectively located at both ends of the bottom cover 51, with the test paper closer to the first air hole 511 and the gas sensor 4 closer to the second air hole 512.

[0049] The box body 5 is provided with a transparent area, and the housing 1 is provided with a viewing window directly opposite the transparent area. When the plug-in portion 31 is inserted into the socket 121, the support portion 32 is directly opposite the transparent area, and thus the test paper is directly opposite the transparent area. This allows the color change of the test paper to be observed through the viewing window and the transparent area, eliminating the need to remove the test paper for observation and simplifying the testing process. If desired, the transparent area can be provided on the cover plate 52. Furthermore, to improve the sealing performance of the detector, a display screen can be provided within the housing 1, with a viewing window provided on the housing 1 directly opposite the display screen.

[0050] See also Figure 1 and Figure 3The surface of the housing 1 is provided with a clearance groove 122, which communicates with the socket 121. When the plug-in portion 31 is inserted into the socket 121, a gap is formed between the plug-in portion 31 and the bottom wall of the clearance groove 122. This gap facilitates applying force to the plug-in portion 31 to remove the tray 3, thereby facilitating the removal of the tray 3. Two clearance grooves 122 are provided, one at opposite ends of the socket 121, as needed.

[0051] See also Figure 1 、 Figure 2 and Figure 3 The outer shell 1 includes a bottom shell 11 and an upper cover 12. The upper cover 12 is detachably connected to the bottom shell 11 and encloses the bottom shell 11 to form a accommodating cavity. For example, the upper cover 12 and the bottom shell 11 can be snap-fitted. The pump body 2 and the box body 5 are both fixed on the bottom shell 11. The upper cover 12 is provided with a socket 121. When the plug-in portion 31 is inserted into the socket 121, the plug-in portion 31 is in sealing contact with the side wall of the upper cover 12 surrounding the socket 121, thereby ensuring the sealing of the connection between the tray 3 and the outer shell 1.

[0052] It should be noted that the housing 1 is relatively small, making it easy to carry for immediate testing and suitable for a wide range of locations. Furthermore, the test paper and the gas sensor 4 can simultaneously detect the concentration of the gas to be tested within the gas storage chamber, or they can be detected independently. When the test paper and the gas sensor 4 simultaneously detect the concentration of the gas to be tested within the gas storage chamber, the results of the two testing methods can be compared to determine the validity of the test paper and whether it is expired.

[0053] See also Figure 2 and Figure 3 The dual-detection food freshness detector further includes a piercing element 6 disposed within the housing 1. The piercing element 6 is provided with an air inlet passageway connected to the air inlet. The piercing element 6 can pierce the vacuum packaging bag and extend into the bag. When the pump body 2 extracts the gas to be tested, the gas within the vacuum packaging bag flows into the pump body 2 through the air inlet passageway and the air inlet hole. It should be understood that the piercing element 6 allows the concentration of the gas to be tested within the bag to be tested to be tested without opening the bag, thus preventing inaccurate test results caused by the introduction of air when the bag is opened.

[0054] According to actual needs, such as Figure 3 As shown, the puncture element 6 may include a needle tube 61 and a syringe 62, the syringe 62 is fixed on the bottom shell 11, the needle tube 61 is fixed on the syringe 62, and the needle tube 61 is arranged at one end of the outer shell 1, and the air inlet channel is respectively arranged in the needle tube 61 and the syringe 62, and the syringe 62 is connected to the pump body 2 through the air pipe.

[0055] See also Figure 1 and Figure 2The food freshness detector with dual detection function also includes a cap 7, which is detachably connected to the shell 1. The cap 7 is used to cover the pricking member 6. The cap 7 can be removed when performing detection, and can be installed on the shell 1 when not performing detection to cover the pricking member 6, thereby preventing the pricking member 6 from being damaged or the user from being pricked by the pricking member 6.

[0056] See also Figure 2 and Figure 3 The food freshness detector with dual detection functions also includes a control panel 8, a switch assembly 9, and a power supply 10. The switch assembly 9 is mounted on the surface of the housing 1 and is electrically connected to the control panel 8. The power supply 10 is mounted within the housing 1 and is electrically connected to the pump 2, the switch assembly 9, and the control panel 8. The switch assembly 9 includes a power switch 91 and a start switch 92. The power switch 91 controls whether the power supply 10 supplies power to the detector, while the start switch 92 controls whether the pump 2 is activated.

[0057] Depending on actual needs, the power switch 91 may be a slide switch, the start switch 92 may be a push button switch, the control board 8 is provided with a controller, which may be an ESP32 series single-chip microcomputer; the control board 8 is fixed to the bottom case 11, and the power supply 10 may be a battery, which is disposed between the control board 8 and the bottom case 11. A battery indicator icon may be provided on the display screen, and when the display shows low battery, charging is required in a timely manner.

[0058] A communication module is provided on the control board 8, and the communication module can be a Bluetooth module and / or a WIFI module. The detector can be connected to a terminal device (such as a mobile phone) through the communication module, so that the concentration of the gas to be tested detected by the gas sensor 4 can be uploaded through the communication module, thereby remotely obtaining the detection data in real time.

[0059] The following is an example of the specific detection steps of a food freshness detector with dual detection functions:

[0060] 1. Turn on the power switch 91 to power on the detector.

[0061] 2. Take out the tray 3 from the side of the housing 1, place the test paper on the tray 3, and then insert the tray 3 with the test paper back.

[0062] 3. Insert the piercing element 6 into the food packaging bag, then press the start switch 92 , the pump body 2 starts to work, and the pump body 2 draws the gas to be tested in the bag into the gas storage cavity of the box body 5 .

[0063] 4. When the gas to be tested passes over the test paper, the color of the test paper will change immediately according to the concentration of carbon dioxide. The color change of the test paper can be observed through the window on the shell 1 (such as Figure 4For example, when the carbon dioxide concentration is between 1% and 6%, it means that the food has been contaminated by microorganisms. The higher the concentration, the more serious the contamination. When the concentration reaches above 7%, it means that the food has spoiled.

[0064] 5. The control board 8 controls the gas sensor 4 to detect the concentration of the gas to be measured in the gas storage chamber. The control board 8 receives the detection data transmitted by the gas sensor 4 and sends it to the display screen. The carbon dioxide concentration value displayed on the display screen can accurately show the current gas concentration.

[0065] 6. When the test is completed, the puncture element 6 is separated from the packaging bag, and the start switch 92 is pressed again to extract air and discharge the carbon dioxide gas remaining in the instrument, so that the test paper can return to its original color and the next test can be carried out.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A food freshness detector with dual detection functions, characterized in that: include: a housing having an air outlet; A pump body is disposed in the housing, the pump body is provided with an air inlet for communicating with the environment to be measured, and the air outlet is connected to the pump body; a tray, detachably connected to the housing, the tray being used to mount a test paper, the test paper being used to detect the concentration of the gas to be tested in the housing; A gas sensor is disposed in the housing, and is used to detect the concentration of the gas to be measured in the housing; a display screen, disposed on the housing; as well as, A control panel is disposed in the housing and is electrically connected to the pump body, the display screen and the gas sensor.

2. The food freshness detector with dual detection function according to claim 1, characterized in that: The shell is provided with a socket, and the tray is plug-connected with the socket.

3. The food freshness detector with dual detection function according to claim 2, characterized in that: The tray comprises: A plug-in portion, plug-connected with the socket; a supporting portion, disposed on the plug-in portion; and The clamping portion is arranged on the supporting portion, and a clamping gap is provided between the clamping portion and the supporting portion, and the clamping gap is used to fix the test paper.

4. The food freshness detector with dual detection function according to claim 3, characterized in that: The food freshness detector with dual detection functions further includes a box body disposed within the housing, the box body being provided with a first air hole and a second air hole, the first air hole being connected to the pump body, and the second air hole being connected to the first air hole and the air outlet, respectively; Wherein, when the plug-in portion is inserted into the socket, the support portion extends into the box body.

5. The food freshness detector with dual detection function according to claim 4, characterized in that: The box body is provided with a transparent area, and the shell is provided with a window arranged opposite to the transparent area; Wherein, when the plug-in portion is inserted into the socket, the support portion is arranged opposite to the transparent area.

6. The food freshness detector with dual detection function according to claim 2, characterized in that: A clearance groove is provided on the surface of the shell, and the clearance groove is communicated with the socket.

7. The food freshness detector with dual detection function according to claim 1, characterized in that: The food freshness detector with dual detection functions further includes a pricking member, which is disposed on the housing and has an air inlet passage communicating with the air inlet.

8. The food freshness detector with dual detection function according to claim 7, characterized in that: The food freshness detector with dual detection functions further includes a cover cap, which is detachably connected to the housing and is used to cover the puncture element.

9. The food freshness detector with dual detection function according to claim 1, characterized in that: The food freshness detector with dual detection function also includes: a switch assembly, disposed on a surface of the housing, the switch assembly being electrically connected to the control board; and A power supply is disposed in the housing, and the power supply is electrically connected to the pump body, the display screen, the gas sensor, the switch assembly, and the control board.

10. The food freshness detector with dual detection function according to claim 9, characterized in that: A communication module is provided on the control board.

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