A cold chain temperature recording device and a temperature recording method thereof

Abstract

The application relates to a temperature recording device for a cold chain and a temperature recording method thereof. The temperature recording device can be applied to the temperature recording of the fields of food, medicines and the like which need to be kept at low temperature for production, storage and transportation. The temperature recording device comprises a base, a transparent cover, a spiral bimetallic sheet, a central shaft, a shaft sleeve, a temperature pointer, a scale dial and a rotating dial. A one-way hook is arranged on the temperature pointer, a recording arrow and a clamping groove are arranged on the rotating dial, the central shaft is fixed in the center of the base, the shaft sleeve is sleeved on the central shaft and can rotate, the outer end of the spiral bimetallic sheet is connected to the inner wall of the base, the inner end of the spiral bimetallic sheet is connected to the shaft sleeve, the spiral bimetallic sheet is stretched and bent to drive the shaft sleeve to rotate when the temperature changes, the rotating dial is covered above the scale dial and can rotate, the shaft sleeve penetrates through the scale dial and the rotating dial, the lower end of the shaft sleeve is connected to the spiral bimetallic sheet, the upper end of the shaft sleeve is connected to the temperature pointer, the shaft sleeve drives the temperature pointer to rotate, and the transparent cover is covered on the upper portion of the base.

Description

TECHNICAL FIELD

[0001] The cold chain temperature recording device and its temperature recording method of the present application relates to a temperature recording device and its method for cold chain. It can be applied to the temperature recording of food, medicine and other fields which need to keep low temperature during production, storage and transportation. BACKGROUND

[0002] In order to keep the quality of food and medicine, a series of operations that keep low temperature from production to consumption are called cold chain. Because of the long cycle of production, storage, transportation and consumption, the whole process of cold chain must be monitored to ensure that the temperature does not exceed the specified requirements. The existing technology is to use electronic temperature recording instrument to record and playback temperature to check the temperature during the operation of cold chain.

[0003] The main problems of the above existing technology are:

[0004] 1. Electronic temperature recording equipment is technically complex and high cost. The value of a single device is tens to hundreds of yuan, which cannot be matched for low-value items and cannot meet the temperature monitoring of small packages of cold chain items.

[0005] 2. Battery life impact. The storage and service life of the battery used by the electronic temperature recording device are limited, which greatly limits the storage period and service life of such electronic temperature recording devices.

[0006] 3. Incomplete temperature recording data. The data storage capacity of electronic temperature recording equipment is limited, and there is a contradiction between data recording density and data storage length. The measure of increasing temperature sampling interval (common sampling interval is 1, 5, 10 minutes) to increase recording time will cause temperature missing rate to increase. If it is sampled every 5 minutes, it will not record the temperature anomaly that occurs within every 5 minutes.

[0007] 4. Pre-use operation. Electronic temperature recording equipment needs to be powered off during storage, and must be powered on before use. Some devices will cause the battery to fail due to long storage time, and temporarily install a new battery before use. These operations increase the work intensity of cold chain operation.

[0008] 5. Read data operation. Electronic temperature recording equipment often uses printers, computers and other supporting equipment to playback temperature recording data, which has the advantage of complete display of the entire cold chain historical temperature curve, and the disadvantage of high system cost, complex and tedious operation process, which cannot be used for single low-value items in the cold chain.

[0009] 6. Poor low temperature adaptability. Existing batteries cannot work in an environment below minus 40 degrees, limiting their use in low temperature conditions (some vaccines need to be stored in an environment of minus 70 degrees).

[0010] In view of the above problems, there is an urgent need for a small, low-cost, low-temperature adaptive, and easy-to-use cold chain temperature recording device. SUMMARY

[0011] The present application aims to solve the technical problems of existing cold chain temperature recording technology, such as technical complexity, high cost, and inconvenient operation. The present application proposes a cold chain temperature recording device and a temperature recording method, which is a cold chain temperature recording device and a method thereof. The device uses a simple and reliable spiral bimetallic strip to sense temperature and a rotating dial to record the highest temperature. The device is fully mechanical, low-cost, battery-free, wide-temperature-range, and operation-free, and can be used for cold chain temperature monitoring of various low-value single items.

[0012] The cold chain temperature recording device and the temperature recording method thereof adopt the following technical solutions:

[0013] A cold chain temperature recording device includes a base, a transparent cover, a spiral bimetallic strip, a central shaft, a shaft sleeve, a temperature pointer, a scale dial, and a rotating dial. The temperature pointer is provided with a one-way hook that protrudes from the lower part of the temperature pointer and has an inclination. The rotating dial is provided with a recording arrow and a clamping groove. The central shaft is fixed in the center of the base, and the shaft sleeve is rotatably sleeved on the central shaft. The outer end of the spiral bimetallic strip is connected to the inner wall of the base, and the inner end of the spiral bimetallic strip is connected to the shaft sleeve. When the temperature changes, the spiral bimetallic strip stretches and bends to drive the shaft sleeve to rotate. The outer edge of the scale dial is fixed to the inner wall of the base and cannot rotate. The position of the scale dial ensures that it covers the spiral bimetallic strip above and does not affect the rotation of the spiral bimetallic strip and the shaft sleeve. The rotating dial covers the scale dial above and can rotate. The shaft sleeve passes through the scale dial and the rotating dial. The lower end of the shaft sleeve is connected to the spiral bimetallic strip, and the upper end of the shaft sleeve is connected to the temperature pointer. The shaft sleeve drives the temperature pointer to rotate. The transparent cover is covered on the upper part of the base.

[0014] When the temperature decreases, the spiral bimetallic strip drives the temperature pointer to rotate counterclockwise. When the temperature increases, the spiral bimetallic strip drives the temperature pointer to rotate clockwise. The temperature pointer displays the current temperature corresponding to the scale of the scale dial. The temperature pointer is provided with a one-way hook that protrudes from the lower part of the temperature pointer and has an inclination. The one-way hook cooperates with the clamping groove of the rotating dial to make the rotating dial rotate clockwise in one direction when the temperature increases, and the rotating dial does not move when the temperature decreases.

[0015] The temperature recording method of the cold chain temperature recording device is characterized in that a scale dial is fixed and does not rotate, and a rotating dial can rotate. A spiral bimetallic strip is affected by temperature to drive a shaft sleeve to rotate, and the shaft sleeve is connected to a temperature pointer to rotate together. The cold chain temperature recording device is shipped with a recording arrow of the rotating dial indicating a required low temperature position (shown as -1℃). When the temperature decreases to the low temperature position indicated by the recording arrow, a one-way hook on the temperature pointer is engaged into a clamping groove of the rotating dial. In this case, if the temperature increases, the temperature pointer rotates clockwise, the one-way hook and the clamping groove are linked to drive the rotating dial to rotate clockwise, so that the recording arrow points to the increased temperature value. If the temperature decreases, the temperature pointer rotates counterclockwise, and the one-way hook slides out of the clamping groove due to the inclination angle, so that the one-way hook and the clamping groove are disengaged, and the rotating dial does not move. If the temperature increases again and exceeds the temperature indicated by the recording arrow, the one-way hook falls into the clamping groove again, the temperature pointer drives the rotating dial to rotate clockwise again, and the recording arrow rotates clockwise to a higher temperature.

[0016] Thus, the cold chain temperature recording device is in a normal temperature state during factory storage, the temperature pointer is in a normal temperature zone (higher than 10℃), and the recording arrow of the rotating dial points to a low temperature zone (shown as -1℃). During normal temperature storage, the cold chain temperature recording device will always remain in this state. When entering a cold chain environment, the temperature decreases to a temperature specified by the cold chain, and the temperature corresponding to the recording arrow of the rotating dial during factory storage. The cold chain temperature recording device will automatically start to enter a temperature recording state. During cold chain operation, any temperature increase will cause the rotating dial to rotate clockwise, and the scale of the scale dial corresponding to the recording arrow of the rotating dial always shows the highest temperature experienced. The above is the first embodiment of the cold chain temperature recording device.

[0017] The cold chain temperature recording device comprises a base, a transparent cover, a spiral bimetallic strip, a central shaft, a shaft sleeve, a temperature pointer, a rotating dial, and a normal temperature step. The temperature pointer is provided with a one-way hook protruding downward from the lower part of the temperature pointer. The rotating dial is installed on a support table arranged on the inner side of the base and is provided with a recording arrow and an arc-shaped sliding groove. The central shaft is fixed in the center of the base, and the shaft sleeve is sleeved on the central shaft and can rotate. The outer end of the spiral bimetallic strip is connected to the inner wall of the base, and the inner end of the spiral bimetallic strip is connected to the shaft sleeve. When the temperature changes, the spiral bimetallic strip stretches and bends to drive the shaft sleeve to rotate. The transparent cover is arranged on the upper part of the base and is provided with a scale. The lower part of the inner side of the base is provided with the support table, and the rotating dial is installed on the support table. The upper part of the inner side of the base is provided with the normal temperature step. The rotating dial can rotate above the support table, and the height of the support table ensures that the rotating dial and the spiral bimetallic strip do not interfere with each other.

[0018] The shaft sleeve passes through the rotating dial, the lower end of the shaft sleeve is connected with the spiral bimetallic strip, the top end of the shaft sleeve is connected with the temperature pointer, and the shaft sleeve drives the temperature pointer to rotate; when the temperature decreases, the spiral bimetallic strip drives the temperature pointer to rotate counterclockwise; when the temperature increases, the spiral bimetallic strip drives the temperature pointer to rotate clockwise; the temperature pointer is provided with a scale on the transparent cover corresponding to the scale table, and the scale displays the current temperature; the temperature pointer is provided with a one-way hook which protrudes from the lower part of the temperature pointer and vertically downward; the one-way hook is matched with the arc-shaped sliding groove of the rotating dial, so that the rotating dial generates clockwise one-way rotation when the temperature increases, and the rotating dial does not move when the temperature decreases. The above is the second embodiment of the cold chain temperature recording device.

[0019] The second embodiment of the cold chain temperature recording device of the application has the same working principle as the first embodiment of the cold chain temperature recording device. The structure is different from the above-mentioned embodiment in that: 1) a normal temperature step is added, the function of the normal temperature step is to ensure that the rotating dial does not rotate with the temperature pointer during normal temperature storage; 2) the one-way hook on the temperature pointer is changed to vertically downward, and no longer has an inclination angle; 3) the clamping groove on the rotating dial is changed to a long arc-shaped sliding groove, so that the one-way hook can move in the arc-shaped sliding groove; 4) the scale dial is cancelled, the temperature scale can be engraved on the transparent cover, and the supporting effect of the scale dial on the rotating dial in the first embodiment of the cold chain temperature recording device can be realized by the support table on the inner wall of the base, so that the cancellation of the scale dial does not affect the basic function of the application.

[0020] A temperature recording method of a cold chain temperature recording device, when the cold chain temperature recording device is shipped, the rotating dial is set in the counterclockwise direction, and the recording arrow is stopped in the low temperature area, and this temperature should be the normal low temperature value that the cold chain should guarantee, which can be set when shipped. The temperature pointer is located above the normal temperature step when shipped, and the one-way hook on the temperature pointer does not contact the rotating dial in the normal temperature environment, so any rotation of the temperature pointer does not affect the rotating dial, and the position of the rotating dial is not changed during normal temperature storage.

[0021] When entering the cold chain environment, the temperature decreases to the temperature specified by the cold chain (the temperature corresponding to the recording arrow in the rotating dial when shipped), the spiral bimetallic strip drives the shaft sleeve and the temperature pointer to rotate counterclockwise under the action of low temperature; when the temperature pointer rotates to the temperature corresponding to the recording arrow, it is just the interruption of the normal temperature step, the temperature pointer will fall from the step, and the one-way hook on the temperature pointer falls into the arc-shaped sliding groove on the rotating dial, and the temperature recording process is started.

[0022] If the cold chain environment temperature rises, the helical bimetallic strip is affected by the temperature rise to drive the shaft sleeve and the temperature pointer to rotate clockwise; the one-way hook on the temperature pointer drives the circular sliding groove on the rotating dial to rotate synchronously; the recording arrow on the rotating dial rotates clockwise, so that the recording arrow points to the environment temperature after rising. At this time, the temperature pointer moves below the normal temperature step and is no longer constrained by the normal temperature step.

[0023] If the cold chain temperature decreases again, the helical bimetallic strip drives the shaft sleeve and the temperature pointer to rotate counterclockwise under the action of low temperature; the one-way hook on the temperature pointer will rotate counterclockwise in the circular sliding groove on the rotating dial, and will not generate a pushing force on the circular sliding groove. The rotating dial will stay in place when the temperature decreases, and will not rotate counterclockwise with the temperature pointer, and the recording arrow continues to point to the high temperature value just experienced.

[0024] If the cold chain temperature rises again, the helical bimetallic strip is affected by the temperature rise to drive the shaft sleeve and the temperature pointer to rotate clockwise; when the temperature rises above the previously recorded temperature, the one-way hook on the temperature pointer rotates to the right end of the circular sliding groove on the rotating dial, and the one-way hook on the temperature pointer again drives the circular sliding groove on the rotating dial to rotate synchronously; the recording arrow on the rotating dial rotates clockwise, so that the recording arrow points to the environment temperature after rising again.

[0025] The helical bimetallic strip uses a commercially available bimetallic strip for ordinary thermometers, and the bimetallic strip with corresponding low temperature parameters can be selected according to the low temperature requirements of the cold chain.

[0026] The principles of the two embodiments of the present application are completely the same, the helical bimetallic strip is used as a temperature sensing device, and the rotating dial rotates in one direction to record the highest temperature, so that the entire device has the following advantages:

[0027] 1. Simple structure and low cost. The main component of the bimetallic strip is cheap and easy to obtain, and the cost of the entire temperature recording device can be controlled in the range of a few yuan. It can be used one time or repeatedly.

[0028] 2. Small size. The temperature recording device of the present application can be 10-20mm in size, and can be attached to the surface of a single monitored object in the cold chain or placed in the smallest package.

[0029] 3. Wide temperature adaptation range. The working temperature range of the bimetallic strip device is from low temperature-80Ƈ to high temperature several hundred degrees, which can meet the temperature recording of the cold chain with general low temperature requirements of 2-8Ƈ, and can also adapt to the cold chain temperature recording of-70Ƈ below zero (at this temperature, the battery cannot work).

[0030] 4. Good indication accuracy. The temperature accuracy of the bimetallic strip temperature device can reach 1.5Ƈ, which can meet the requirements of cold chain temperature recording.

[0031] 5. No power supply is needed, and the product can be stored for a long time after leaving the factory.

[0032] 6. Automatic recording. The temperature recording is automatically started after entering the low-temperature environment, and no starting setting operation is needed.

[0033] 7. Long recording time. There is no limit to the recording time length, and the highest temperature experienced by the cold chain can be recorded throughout.

[0034] 8. No need to play back. The highest temperature experienced is directly displayed, which is easy to interpret without the need for data playback equipment. BRIEF DESCRIPTION OF DRAWINGS

[0035] The application will be further described below in combination with the drawings:

[0036] Figure 1 is a structural section view of the application;

[0037] Figure 2 is a structural top view of the application;

[0038] Figure 3 is a schematic view of the cooperation between the one-way hook on the temperature pointer and the clamping groove on the rotating dial plate of the application Figure 1 ;

[0039] Figure 4 is a schematic view of the cooperation between the one-way hook on the temperature pointer and the clamping groove on the rotating dial plate of the application Figure 2 ;

[0040] Figure 5 is a component exploded view of Example 1 of the application;

[0041] Figure 6 is a component exploded view of Example 2 of the application;

[0042] Figure 7 is a schematic view of the normal temperature storage state of Example 2 of the application;

[0043] Figure 8 is a schematic view of the low-temperature starting state of Example 2 of the application;

[0044] Figure 9 is a schematic view of the temperature rising state after starting of Example 2 of the application.

[0045] Markings in the drawings:

[0046] 1, base, 2, transparent cover, 3, central shaft, 4, spiral bimetallic strip, 5, shaft sleeve, 6, temperature pointer, 7, one-way hook, 8, scale dial, 9, rotating dial, 10, recording arrow, 11, clamping groove, 12, normal temperature step (example 2), 13, circular arc sliding groove (example 2), 1-2, scale dial (example 2), 2-1, support table (example 2). DETAILED DESCRIPTION

[0047] Referring to the drawings Figures 1-9 The cold chain temperature recording device comprises a base 1, a transparent cover 2, a spiral bimetallic strip 4, a central shaft 3, a shaft sleeve 5, a temperature pointer 6, a scale dial 8, and a rotating dial 9. The temperature pointer 6 is provided with a one-way hook 7 protruding from the lower part of the temperature pointer 6 and having an inclination angle. The rotating dial 9 is provided with a recording arrow 10 and a clamping groove 11. The central shaft 3 is fixed in the center of the base 1, and the shaft sleeve 5 is rotatably sleeved on the central shaft 3. The outer end of the spiral bimetallic strip 4 is connected to the inner wall of the base 1, and the inner end of the spiral bimetallic strip 4 is connected to the shaft sleeve 5. When the temperature changes, the spiral bimetallic strip 4 is stretched and bent to drive the shaft sleeve 5 to rotate. The outer edge of the scale dial 8 is fixedly connected to the inner wall of the base 1 and cannot rotate. The position of the scale dial 8 is ensured to cover the spiral bimetallic strip 4 from above and not to affect the rotation of the spiral bimetallic strip 4 and the shaft sleeve 5. The rotating dial 9 covers the scale dial 8 from above and can rotate. The shaft sleeve 5 penetrates through the scale dial 8 and the rotating dial 9. The lower end of the shaft sleeve 5 is connected to the spiral bimetallic strip 4, and the upper end of the shaft sleeve 5 is connected to the temperature pointer 6. The shaft sleeve 5 drives the temperature pointer 6 to rotate. The transparent cover 2 is covered on the upper part of the base 1.

[0048] When the temperature decreases, the spiral bimetallic strip 4 drives the temperature pointer 6 to rotate counterclockwise. When the temperature increases, the spiral bimetallic strip 4 drives the temperature pointer 6 to rotate clockwise. The temperature pointer 6 displays the current temperature corresponding to the scale of the scale dial 8. The temperature pointer 6 is provided with a one-way hook 7 protruding from the lower part of the temperature pointer 6 and having an inclination angle. The one-way hook 7 cooperates with the clamping groove 11 of the rotating dial 9 to make the rotating dial rotate clockwise in one direction when the temperature increases, and the rotating dial 9 does not move when the temperature decreases.

[0049] The spiral bimetallic strip 4 adopts a commercially available bimetallic strip for ordinary thermometers. The bimetallic strip with corresponding low-temperature parameters can be selected according to the low-temperature requirements of the cold chain.

[0050] A temperature recording method of a cold chain temperature recording device, the scale dial 8 is fixed and cannot rotate, and the rotating dial 9 can rotate. The spiral bimetallic strip 4 is affected by the temperature to drive the shaft sleeve 5 to rotate, and the upper end of the shaft sleeve 5 is connected to the temperature pointer 6 to rotate together. When the cold chain temperature recording device is shipped, the recording arrow 10 of the rotating dial 9 is indicated at the required low-temperature position (such as -18℃). Figure 1When the temperature decreases to the low temperature position indicated by the recording arrow 10, the one-way hook 7 on the temperature pointer 6 is engaged in the engaging slot 11 of the rotating dial 9; in this case, if the temperature increases, the temperature pointer 6 rotates clockwise, the one-way hook 7 is linked with the engaging slot 11, and the rotating dial 9 rotates clockwise, so that the recording arrow points to the increased temperature value; if the temperature decreases, the temperature pointer 6 rotates counterclockwise, and because the one-way hook 7 has a certain angle, the one-way hook 7 slides out of the engaging slot 11 when the temperature pointer 6 rotates counterclockwise, the one-way hook 7 is disengaged from the engaging slot 11, and the rotating dial 9 remains in place; if the temperature increases again and exceeds the temperature indicated by the recording arrow, the one-way hook 7 will fall into the engaging slot 11 again, the temperature pointer 6 rotates the rotating dial clockwise again, and the recording arrow 10 rotates clockwise to a higher temperature.

[0051] Thus, the cold chain temperature recording device of the product is in a normal temperature state during factory storage, the temperature pointer 6 is in a normal temperature zone (higher than 10℃), and the recording arrow of the rotating dial 9 points to a low temperature zone (lower than 10℃). Figure 1 The recording arrow of the rotating dial 9 points to a low temperature zone (lower than 10℃), and the recording arrow of the rotating dial 9 points to a low temperature zone (lower than 10℃). When the temperature decreases to the low temperature position indicated by the recording arrow 10, the one-way hook 7 on the temperature pointer 6 is engaged in the engaging slot 11 of the rotating dial 9; in this case, if the temperature increases, the temperature pointer 6 rotates clockwise, the one-way hook 7 is linked with the engaging slot 11, and the rotating dial 9 rotates clockwise, so that the recording arrow points to the increased temperature value; if the temperature decreases, the temperature pointer 6 rotates counterclockwise, and because the one-way hook 7 has a certain angle, the one-way hook 7 slides out of the engaging slot 11 when the temperature pointer 6 rotates counterclockwise, the one-way hook 7 is disengaged from the engaging slot 11, and the rotating dial 9 remains in place; if the temperature increases again and exceeds the temperature indicated by the recording arrow, the one-way hook 7 will fall into the engaging slot 11 again, the temperature pointer 6 rotates the rotating dial clockwise again, and the recording arrow 10 rotates clockwise to a higher temperature.

[0052] The second embodiment of the cold chain temperature recording device: the cold chain temperature recording device comprises a base 1, a transparent cover 2, a spiral bimetallic strip 4, a central shaft 3, a shaft sleeve 5, a temperature pointer 6, a rotating dial 9, and a normal temperature step 12. The temperature pointer 6 is provided with a one-way hook 7 protruding from the lower part of the temperature pointer 6, and the one-way hook is vertically downward. The rotating dial 9 is installed on a support table 1-2 arranged on the inner side of the base 1, and is provided with a recording arrow 10 and an arc-shaped sliding groove 13. The central shaft 3 is fixed in the center of the base 1, and the shaft sleeve 5 is rotatably sleeved on the central shaft 3. The outer end of the spiral bimetallic strip 4 is connected to the inner wall of the base 1, and the inner end of the spiral bimetallic strip 4 is connected to the shaft sleeve 5. When the temperature changes, the spiral bimetallic strip 4 is stretched and bent to drive the shaft sleeve 5 to rotate. The transparent cover 2 is arranged on the top end of the base 1, and is provided with a scale 2-1. The lower part of the inner side of the base 1 is provided with the support table 1-2, and the rotating dial 9 is installed on the support table 1-2. The upper part of the inner side of the base 1 is provided with the normal temperature step 12. The rotating dial 9 can rotate above the support table 1-2, and the height of the support table 1-2 ensures that the rotating dial 9 and the spiral bimetallic strip do not interfere with each other.

[0053] The shaft sleeve 5 passes through the rotating dial 9, the lower end of the shaft sleeve 5 is connected with the spiral bimetallic strip 4, the top end of the shaft sleeve 5 is connected with the temperature pointer 6, and the shaft sleeve 5 drives the temperature pointer 6 to rotate; when the temperature decreases, the spiral bimetallic strip 4 drives the temperature pointer 6 to rotate counterclockwise; when the temperature increases, the spiral bimetallic strip 4 drives the temperature pointer 6 to rotate clockwise; the temperature pointer 6 corresponds to the scale table 2-1 on the transparent cover 2, and the current temperature is displayed; the temperature pointer 6 is provided with a one-way hook 7, the one-way hook 7 protrudes from the lower part of the temperature pointer 6 and vertically downward, and the one-way hook 7 is matched with the arc-shaped sliding groove 13 of the rotating dial 9, so that the rotating dial 9 generates clockwise one-way rotation when the temperature increases, and the rotating dial 9 does not move when the temperature decreases.

[0054] The spiral bimetallic strip 4 is a commercially available bimetallic strip for ordinary thermometers, and the bimetallic strip with a corresponding low-temperature parameter can be selected according to the low-temperature requirement of the cold chain.

[0055] The working principles of the first embodiment, i.e., example 1, and the second embodiment, i.e., example 2, of the cold chain temperature recording device will be described below with reference to the accompanying drawings:

[0056] Referring to Figures 1-5 The working principle of the first embodiment, i.e., example 1, of the cold chain temperature recording device will be described.

[0057] When leaving the factory, the rotating dial 9 is arranged in the counterclockwise direction, so that the recording arrow 10 stays in the low-temperature area (for example, -1℃ in Figure 1 , 2 The temperature should be the normal low-temperature value that the cold chain should guarantee, and can be set when leaving the factory. After leaving the factory, the cold chain temperature recording device can be stored at room temperature, and there is no storage period limit. During the room temperature storage period, the temperature pointer 6 points to the normal temperature area generally higher than 10℃, and the recording arrow 10 stays in the low-temperature area, and they do not interfere with each other, and will always remain in this state during the room temperature storage period.

[0058] When entering the cold chain environment, the temperature decreases to the temperature specified by the cold chain (the temperature corresponding to the recording arrow 10 in the rotating dial 9 when leaving the factory), the spiral bimetallic strip 4 drives the shaft sleeve 5 and the temperature pointer 6 to rotate counterclockwise under the action of low temperature; when the temperature pointer 6 rotates to the temperature corresponding to the recording arrow 10, the one-way hook 7 on the temperature pointer 6 falls into the clamping groove 11 on the rotating dial 9, and the temperature recording process is started. Referring to Figure 3 , Figure 4 .

[0059] If the temperature of the cold chain environment rises, the helical bimetallic strip 4 is affected by the temperature rise to drive the shaft sleeve 5 and the temperature pointer 6 to rotate clockwise; the one-way hook 7 on the temperature pointer 6 pushes the clamping groove 11 on the rotating dial 9 to rotate synchronously; the recording arrow 10 on the rotating dial 9 rotates clockwise, so that the recording arrow 10 points to the temperature after the rise. See Figure 3 、 Figure 4 .

[0060] If the temperature of the cold chain decreases again, the helical bimetallic strip 4 drives the shaft sleeve 5 and the temperature pointer 6 to rotate counterclockwise under the action of low temperature; the one-way hook 7 on the temperature pointer 6 will slide out of the clamping groove 11 on the rotating dial 9 due to the action of its own inclination angle, that is, the one-way hook 7 is separated from the clamping groove 11 when rotating counterclockwise, and the rotating dial 9 will remain in place when the temperature decreases and will not rotate counterclockwise with the temperature pointer 6, and the recording arrow 10 continues to point to the high temperature value just experienced.

[0061] If the temperature of the cold chain rises again, the helical bimetallic strip 4 is affected by the temperature rise to drive the shaft sleeve 5 and the temperature pointer 6 to rotate clockwise; when the temperature rises above the previously recorded temperature, the one-way hook 7 on the temperature pointer 6 will fall into the clamping groove 11 on the rotating dial 9 again, and the one-way hook 7 on the temperature pointer 6 pushes the clamping groove 11 on the rotating dial 9 to rotate synchronously; the recording arrow 10 on the rotating dial 9 rotates clockwise, so that the recording arrow 10 points to the temperature after the rise again.

[0062] As described above, no matter how the temperature of the cold chain fluctuates, the rotating dial 9 only rotates clockwise when the temperature rises, and the position of the recording arrow 10 always points to the highest temperature experienced by the cold chain environment, thereby meeting the full monitoring and recording of the out-of-control temperature of the cold chain.

[0063] Figures 6-9 is a second embodiment of the cold chain temperature recording device of the present application, that is, the schematic diagram of example 2, and the working principle is exactly the same as that of example 1 described above. The structure is different from that of example 1 in that: 1) a normal temperature step 12 is added, the function of the normal temperature step 12 is to ensure that the rotating dial 9 does not rotate with the temperature pointer 6 during normal temperature storage. 2) The one-way hook 7 on the temperature pointer 6 is changed to be perpendicular downward without inclination angle. 3) The clamping groove 11 on the rotating dial 9 is changed to a long arc-shaped sliding groove 13, so that the one-way hook 7 can move in the arc-shaped sliding groove 13. 4) The scale dial 8 is cancelled, the temperature scale 2-1 is on the transparent cover 2, and the supporting effect of the scale dial 8 on the rotating dial 9 in example 1 can be realized by the supporting table 1-2 on the inner wall of the base, so that the cancellation of the scale dial 8 does not affect the basic function of the present application.

[0064] When the product leaves the factory, the rotating dial 9 is set in the counterclockwise direction, and the recording arrow 10 stays in the low-temperature area, which should be the normal low temperature value that the cold chain should guarantee. This temperature can be set at the time of leaving the factory. The temperature pointer 6 is above the normal-temperature step 12 at the time of leaving the factory, and the one-way hook 7 on the temperature pointer 6 cannot contact the rotating dial 9 in the normal-temperature environment because it is blocked by the normal-temperature step 12. Therefore, any rotation of the temperature pointer cannot affect the rotating dial 9, and the position of the rotating dial 9 will not change during storage in the normal-temperature environment. See Figure 7 .

[0065] When the product enters the cold-chain environment, the temperature decreases to the temperature specified by the cold chain (the temperature corresponding to the recording arrow 10 in the rotating dial 9 at the time of leaving the factory), and the helical bimetallic strip 4 drives the shaft sleeve 5 and the temperature pointer 6 to rotate counterclockwise under the action of low temperature. When the temperature pointer 6 rotates to the temperature corresponding to the recording arrow 10, it just falls off the normal-temperature step 12, and the one-way hook 7 on the temperature pointer 6 falls into the arc-shaped sliding groove 13 on the rotating dial 9, starting the temperature recording process. See Figure 8 .

[0066] If the temperature of the cold-chain environment increases, the helical bimetallic strip 4 drives the shaft sleeve 5 and the temperature pointer 6 to rotate clockwise under the influence of the increasing temperature. The one-way hook 7 on the temperature pointer 6 pushes the arc-shaped sliding groove 13 on the rotating dial 9 to rotate synchronously, and the recording arrow 10 on the rotating dial 9 rotates clockwise, so that the recording arrow 10 points to the increased environmental temperature. At this time, the temperature pointer 6 moves below the normal-temperature step 12 and is no longer constrained by the normal-temperature step 12. See Figure 9 .

[0067] If the temperature of the cold chain decreases again, the helical bimetallic strip 4 drives the shaft sleeve 5 and the temperature pointer 6 to rotate counterclockwise under the action of low temperature. The one-way hook 7 on the temperature pointer 6 rotates counterclockwise in the arc-shaped sliding groove 13 on the rotating dial 9 and does not push the arc-shaped sliding groove 13. The rotating dial 9 will stay in place when the temperature decreases and will not rotate counterclockwise with the temperature pointer 6, and the recording arrow 10 continues to point to the high temperature value just experienced.

[0068] If the temperature of the cold chain increases again, the helical bimetallic strip 4 drives the shaft sleeve 5 and the temperature pointer 6 to rotate clockwise under the influence of the increasing temperature. When the temperature increases beyond the previously recorded temperature, the one-way hook 7 on the temperature pointer 6 rotates to the rightmost end of the arc-shaped sliding groove 13 on the rotating dial 9, and the one-way hook 7 on the temperature pointer 6 pushes the arc-shaped sliding groove 13 on the rotating dial 9 to rotate synchronously. The recording arrow 10 on the rotating dial 9 rotates clockwise, so that the recording arrow 10 points to the environmental temperature that increases again.

[0069] As described above, no matter how the temperature fluctuates during the cold chain, the rotating dial 9 only rotates clockwise when the temperature rises, and the position of the arrow 10 always points to the highest temperature experienced by the cold chain environment, thereby meeting the full monitoring and recording of the temperature runaway of the cold chain.

[0070] The present application provides a cold chain temperature recording device and a temperature recording method thereof. The recording device comprises a base, a transparent cover, a spiral bimetallic strip, a central shaft, a shaft sleeve, a temperature pointer, a scale dial and a rotating dial. By setting a rotating dial and a one-way hook on the temperature pointer, the rotating dial produces one-way rotation when the temperature rises, thereby recording the highest temperature experienced.

[0071] The present application has the advantages of simple structure, small size, low cost, wide temperature adaptation range (low temperature up to -80Ƈ), good indication accuracy (±1.5Ƈ), no power supply, long-term preservation, no need to set before use, automatic temperature recording after entering the low temperature environment, convenient use, direct display of the highest temperature experienced, no need for data playback equipment, reusable, can be attached to the surface of a single item, or placed in the smallest packaging of cold chain items (such as vaccines, etc.), suitable for cold chain temperature recording of various low-value items.

Claims

1. A cold chain temperature recording device, characterized in that, The device includes a base, a transparent cover, a spiral bimetallic strip, a central shaft, a bushing, a temperature pointer, a graduated dial, and a rotating dial. The temperature pointer has a one-way hook that protrudes from its lower part and is angled. The rotating dial has a recording arrow and a slot. The central shaft is fixed to the center of the base, and the bushing is fitted onto the central shaft and can rotate. The outer end of the spiral bimetallic strip connects to the inner wall of the base, and the inner end connects to the bushing. When the temperature changes, the spiral bimetallic strip extends and bends, causing the bushing to rotate. The outer edge of the graduated dial is fixed to the inner wall of the base and cannot rotate. The position of the graduated dial ensures that it covers the spiral bimetallic strip without affecting the rotation of the spiral bimetallic strip and the bushing. The rotating dial covers the graduated dial and can rotate. The bushing passes through the graduated dial and the rotating dial. The lower end of the bushing connects to the spiral bimetallic strip, and the top end connects to the temperature pointer. The bushing drives the temperature pointer to rotate. The transparent cover is mounted on the upper part of the base. When the temperature drops, the spiral bimetallic strip drives the temperature pointer to rotate counterclockwise; when the temperature rises, the spiral bimetallic strip drives the temperature pointer to rotate clockwise; the temperature pointer displays the current temperature on the scale of the dial; the unidirectional hook and the slot of the rotating dial cooperate to make the rotating dial rotate clockwise in one direction when the temperature rises, and remain stationary when the temperature drops.

2. The temperature recording method of the cold chain temperature recording device according to claim 1, characterized in that, The dial is fixed and does not rotate, while the rotating dial can rotate. The spiral bimetallic strip is affected by temperature, which drives the bushing to rotate. The temperature pointer connected to the top of the bushing rotates together with the spindle. When the cold chain temperature recording device leaves the factory, the recording arrow on the rotating dial is positioned at the desired low temperature. When the temperature drops to the low temperature indicated by the recording arrow, the one-way hook on the temperature pointer engages with the slot on the rotating dial. In this case, if the temperature rises, the temperature pointer rotates clockwise, and the one-way hook, in conjunction with the slot, causes the rotating dial to rotate clockwise, making the recording arrow point to the increased temperature value. If the temperature drops, the temperature pointer rotates counterclockwise. Because the one-way hook has a certain angle, it slides out of the slot when the temperature pointer rotates counterclockwise, disengaging from the slot, and the rotating dial remains stationary. If the temperature rises again and exceeds the temperature indicated by the recording arrow, the one-way hook will fall back into the slot, and the temperature pointer will again cause the rotating dial to rotate clockwise, with the recording arrow pointing clockwise to a higher temperature.

3. The temperature recording method of the cold chain temperature recording device according to claim 2, characterized in that, The cold chain temperature recording device is stored at room temperature during factory storage, with the temperature pointer in the room temperature range and the recording arrow on the rotating dial pointing to the low temperature range. It will remain in this state during room temperature storage. When it enters the cold chain environment, the temperature drops to the temperature specified by the cold chain. The cold chain temperature recording device will automatically start and enter the temperature recording state at the temperature corresponding to the recording arrow on the rotating dial at the factory. During the cold chain operation, any temperature rise will cause the rotating dial to rotate clockwise. The scale of the dial corresponding to the recording arrow on the rotating dial will always display the highest temperature it has experienced.

4. A cold chain temperature recording device, characterized in that, The device includes a base, a transparent cover, a spiral bimetallic strip, a central shaft, a bushing, a temperature pointer, a rotating dial, and a room temperature step. The temperature pointer has a one-way hook that protrudes from the bottom of the pointer and points vertically downwards. The rotating dial is mounted on a support platform inside the base and has a recording arrow and an arc-shaped sliding groove. A central shaft is fixed in the center of the base, and a bushing is fitted onto the central shaft and can rotate. The outer end of the spiral bimetallic strip is connected to the inner wall of the base, and the inner end of the spiral bimetallic strip is connected to the bushing. When the temperature changes, the spiral bimetallic strip extends and bends, causing the bushing to rotate. The transparent cover is mounted on the upper part of the base and has a scale. A support platform is located on the lower part of the inner side of the base, and the rotating dial is mounted on the support platform. A room temperature step is located on the upper part of the inner side of the base. The bushing passes through the rotating dial, with a spiral bimetallic strip connected to the lower end of the bushing and a temperature pointer connected to the top of the bushing. The bushing drives the temperature pointer to rotate. When the temperature decreases, the spiral bimetallic strip drives the temperature pointer to rotate counterclockwise; when the temperature increases, the spiral bimetallic strip drives the temperature pointer to rotate clockwise; the temperature pointer displays the current temperature on the scale of the dial on the transparent cover; the temperature pointer is equipped with a one-way hook, which protrudes from the lower part of the temperature pointer and points vertically downward; the one-way hook cooperates with the arc-shaped sliding groove of the rotating dial to make the rotating dial rotate clockwise in one direction when the temperature increases, and remain stationary when the temperature decreases.

5. A cold chain temperature recording device according to claim 4, characterized in that, The rotating dial can rotate above the support, and the height of the support ensures that the rotating dial and the spiral bimetallic strip do not interfere with each other.

6. The temperature recording method of the cold chain temperature recording device according to claim 4, characterized in that, When the cold chain temperature recording device leaves the factory, the rotating dial is set to the counterclockwise direction so that the recording arrow stops in the low temperature area. This temperature should be the normal low temperature value that the cold chain should guarantee. It can be set at the factory. The temperature pointer is located above the room temperature step at the factory. Because of the room temperature step, the one-way hook on the temperature pointer will not contact the rotating dial in the room temperature environment. Therefore, any rotation of the temperature pointer will not affect the rotating dial, ensuring that the position of the rotating dial will not change during room temperature storage. Once inside the cold chain environment, the temperature drops to the temperature specified by the cold chain. The temperature corresponding to the recording arrow on the rotating dial at the time of manufacture is reached. Under the action of low temperature, the spiral bimetallic strip drives the bushing and temperature pointer to rotate counterclockwise. When the temperature pointer rotates to the temperature corresponding to the recording arrow, it is exactly the interruption point of the room temperature step. The temperature pointer will fall off the step, and the one-way hook on the temperature pointer will fall into the arc-shaped sliding groove on the rotating dial, starting the temperature recording process. If the temperature of the cold chain environment rises, the spiral bimetallic strip will be affected by the temperature rise, causing the bushing and temperature pointer to rotate clockwise; the one-way hook on the temperature pointer will push the arc-shaped sliding groove on the rotating dial to rotate synchronously; the recording arrow on the rotating dial will rotate clockwise, so that the recording arrow points to the increased ambient temperature. At this time, the temperature pointer moves below the room temperature step and is no longer constrained by the room temperature step. If the cold chain temperature drops again, the spiral bimetallic strip will cause the bushing and temperature pointer to rotate counterclockwise under the action of low temperature; the one-way hook on the temperature pointer will rotate counterclockwise in the arc-shaped sliding groove on the rotating dial, and will not exert a pushing force on the arc-shaped sliding groove. When the temperature drops, the rotating dial will stay in place and will not rotate counterclockwise with the temperature pointer. The recording arrow will continue to point to the high temperature value just experienced.

7. The temperature recording method of the cold chain temperature recording device according to claim 6, characterized in that, If the cold chain temperature rises again, the spiral bimetallic strip, affected by the increased temperature, causes the bushing and temperature pointer to rotate clockwise. When the temperature rises above the previously recorded temperature, the one-way hook on the temperature pointer rotates to the rightmost end of the arc-shaped sliding groove on the rotating dial, and the one-way hook on the temperature pointer pushes the arc-shaped sliding groove on the rotating dial to rotate synchronously. The recording arrow on the rotating dial rotates clockwise, causing the recording arrow to point to the ambient temperature after the temperature rises again.

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