Refrigerator and calibration method and calibration device thereof

Abstract

The application relates to a refrigerator and a calibration method and device thereof. The refrigerator comprises a cabinet, a wall of which encloses a storage cavity; a platinum resistance fixed on the wall for detecting the ambient temperature in the storage cavity; a standard platinum resistance reserved hole is further arranged on the wall, the standard platinum resistance reserved hole is used for mounting a standard platinum resistance, the standard platinum resistance is used for calibrating the platinum resistance; and a main control board, which is provided with a standard platinum resistance interface in advance and is used for electrically connecting with the standard platinum resistance. The application solves the platinum resistance calibration problem of multiple low-temperature medical refrigerators by using one standard platinum resistance through the mode of adding the standard platinum resistance reserved hole on the cabinet and reserving the standard platinum resistance interface on the main board, and the cost is reduced. The low-temperature medical cabinet can be calibrated in a period, and the problem that the sample is scrapped due to the temperature deviation in the cabinet in the measurement period is solved.

Description

Technical Field

[0001] This invention belongs to the field of refrigerators, and particularly relates to a refrigerator and its calibration method and calibration device. Background Technology

[0002] Low-temperature medical refrigerators are widely used in hospitals to store valuable samples such as reagents and biological products, which have high temperature requirements. However, as medical refrigerators age, the platinum resistance thermometers used for temperature detection can drift, and since the standard measurement period is one year, temperature drift is difficult to detect. When the temperature drift is too large, the stored reagents and biological products are easily spoiled because the required temperature cannot be maintained.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] This invention discloses a refrigerator and its calibration method and device, which are used to solve the problem of platinum resistance calibration in low-temperature refrigerators.

[0005] To solve the above-mentioned technical problems, the present invention provides a refrigerator, comprising:

[0006] The box-like structure has walls that form a storage cavity.

[0007] Platinum resistance thermometers, fixed to the wall, are used to detect the ambient temperature inside the storage cavity;

[0008] The wall is also provided with a standard platinum resistance reserved hole, which is used to install a standard platinum resistance and to calibrate the platinum resistance.

[0009] The main control board has a standard platinum resistance interface for electrical connection with a standard platinum resistance thermometer.

[0010] Optionally, the reserved holes for the platinum resistance and the standard platinum resistance are located on the same wall; the distance between the reserved hole of the standard platinum resistance and the location of the platinum resistance is less than or equal to a preset distance.

[0011] Alternatively, the standard platinum resistance thermometer may have a stepped hole that penetrates the wall.

[0012] Along the through direction of the stepped hole, the stepped hole includes an outer layer reserved hole and an inner layer reserved hole, wherein the inner layer reserved hole is opened in the foam layer of the wall; at least part of the outer layer reserved hole is opened in the foam layer of the wall; the inlet diameter of the outer layer reserved hole is larger than the outlet diameter of the outer layer reserved hole, the outlet diameter of the outer layer reserved hole is larger than the inlet diameter of the inner layer reserved hole, the inlet diameter of the inner layer reserved hole is larger than or equal to the outlet diameter of the inner layer reserved hole, and the outlet of the inner layer reserved hole connects to the storage cavity.

[0013] Alternatively, the outer layer reserved hole is a trapezoidal hole, and the inner layer reserved hole is a cylindrical hole.

[0014] Further optionally, the refrigerator also includes a fastener for securing a standard platinum resistance thermometer in a pre-drilled hole in the inner layer; the refrigerator also includes a seal for sealing a pre-drilled hole in the outer layer.

[0015] The present invention also provides a calibration method for a refrigerator according to any of the preceding claims, comprising:

[0016] Set at least one calibration temperature;

[0017] When the refrigerator operates to steady state at each calibration temperature according to at least one calibration temperature, the temperature values ​​of the platinum resistance thermometer and the standard platinum resistance thermometer are obtained, and the temperature difference between the two is calculated;

[0018] Calculate the correction value based on the temperature difference;

[0019] The platinum resistance thermometer is calibrated according to the correction value.

[0020] Alternatively, when a calibration temperature is set, a correction value is calculated based on the temperature difference using the following formula:

[0021] T A =ΔT1;

[0022] ΔT1=T 1_a -T 1_b ;

[0023] Among them, T A This represents the correction value, ΔT1 represents the temperature difference, and T... 1_a The temperature value of a platinum resistance thermometer is represented by T. 1_b This indicates the temperature value of a standard platinum resistance thermometer.

[0024] Further optionally, when multiple calibration temperatures are set, a correction value is calculated based on the temperature difference, including:

[0025] Obtain the maximum calibration temperature T from multiple calibration temperatures. max and minimum calibration temperature T min And calculate the difference ΔT between the two. max ;

[0026] Determine the difference ΔT max Is it less than or equal to the first preset value?

[0027] If so, divide the multiple calibration temperatures into different temperature ranges;

[0028] Calculate the average temperature difference corresponding to the calibration temperature within each temperature range;

[0029] Calculate the correction value for the corresponding temperature range based on the average temperature difference.

[0030] Further, optionally, a correction value for the corresponding temperature range is calculated based on the average temperature difference, including:

[0031] The average temperature difference is used as the correction value for the corresponding temperature range.

[0032] Further, optionally, when the difference ΔT is determined max When the value is greater than the first preset value, a correction value is calculated based on the temperature difference. The calibration method also includes:

[0033] Calculate the average temperature difference between multiple calibration temperatures and calculate the standard deviation;

[0034] Select calibration temperatures that meet preset conditions in terms of temperature difference, average value, and standard deviation, and calculate the average temperature difference corresponding to the calibration temperatures that meet the preset conditions.

[0035] The average temperature difference corresponding to all calibration temperatures that meet the preset conditions is used as the correction value.

[0036] Further, optionally, the calibration method also includes:

[0037] The average value ΔT is calculated using the following formula. αi :

[0038] The standard deviation is calculated using the following formula:

[0039] The preset condition is: |△T i -△T ai |<3σ;

[0040] Among them, △T αi ΔT represents the average value. i σ represents the temperature difference, n represents the number of calibration temperatures, and σ represents the standard deviation.

[0041] Further, optionally, the platinum resistance thermometer is calibrated based on the correction value, including calculating the corrected temperature using the following formula:

[0042] T N =TT A ;

[0043] Among them, T N T represents the corrected temperature. A The value represents the correction value, and T represents the measured value of the platinum resistance thermometer.

[0044] Further, optionally, before setting the at least one calibration temperature, the calibration method includes:

[0045] In response to the input signal of the standard platinum resistance thermometer, the temperature value T of the standard platinum resistance thermometer is obtained. 0_a Temperature value T of platinum resistance0_b And calculate the difference between the two, ΔT0;

[0046] Determine whether the difference ΔT0 is greater than or equal to the second preset value; if so, stop the calibration.

[0047] Further, optionally, the calibration method also includes:

[0048] In response to the input signal of the standard platinum resistance thermometer, the refrigerator display interface is activated to display the test data during the calibration process.

[0049] The present invention also provides a refrigerator calibration device, which includes one or more processors and a non-transitory computer-readable storage medium storing program instructions, wherein when the one or more processors execute the program instructions, the one or more processors are used to implement the method described in any of the preceding descriptions.

[0050] By adopting the above technical solution, the present invention has the following beneficial effects:

[0051] By adding pre-drilled holes for standard platinum resistance thermometers (PTTs) on the enclosure and pre-drilling PTT interfaces on the mainboard, the calibration of PTTs for multiple low-temperature medical refrigerators can be solved using only one standard PTT, reducing costs. This allows for scheduled temperature calibration of the low-temperature medical refrigerators, resolving the issue of sample discarding due to temperature deviations within the refrigerator during the metrology cycle. The double-sealed structure reduces cold leakage through the pre-drilled holes. Pre-set calibration programs automatically calibrate the PTTs, effectively improving calibration accuracy and ensuring stable refrigerator operation. Furthermore, the close proximity of the standard PTTs to the PTTs reduces temperature deviations between them, making calibration results more reliable.

[0052] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0053] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0054] Figure 1 This is a diagram showing the location of the standard platinum resistance pre-drilled hole inside a refrigerator, according to an embodiment of the present invention.

[0055] Figure 2 This is a circuit diagram of an automatic calibration system according to an embodiment of the present invention.

[0056] Figure 3aThis is a cross-sectional view of a stepped structure of a standard platinum resistance pre-drilled hole according to an embodiment of the present invention.

[0057] Figure 3b This is a left view of a stepped structure of a standard platinum resistance pre-drilled hole according to an embodiment of the present invention.

[0058] Figure 4a This is a top view of a sealing element according to an embodiment of the present invention.

[0059] Figure 4b This is a left view of a seal according to an embodiment of the present invention.

[0060] Figure 5a This is a top view of a fastener according to an embodiment of the present invention.

[0061] Figure 5b This is a side view of a fastener according to an embodiment of the present invention.

[0062] Figure 6 This is a schematic flowchart of a refrigerator calibration method according to an embodiment of the present invention.

[0063] Figure 7 This is a schematic flowchart of a refrigerator calibration method according to an embodiment of the present invention.

[0064] Figure 8 This is a schematic flowchart of a refrigerator calibration method according to an embodiment of the present invention.

[0065] Wherein: 1-Outer layer reserved hole; 2-Foaming layer of the cabinet; 3-Inner layer reserved hole; 4-Sealing component; 5-Fixing component; 6-Shelf; 7-Cabinet; 8-Platinum resistance position; 9-Standard platinum resistance reserved hole; 10-Standard platinum resistance interface; 11-Standard platinum resistance; 12-Platinum resistance; 13-Main control board; 14-Display board.

[0066] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0067] In the description of this invention, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0068] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "contact," and "communication" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0069] As medical refrigerators age, the platinum resistance thermometers used for temperature detection may drift, and since the standard measurement period is one year, these drifts are difficult to detect. When the temperature drift is too large, stored reagents and biological products may easily spoil due to insufficient temperature. Therefore, this embodiment proposes a refrigerator design.

[0070] The refrigerator according to an embodiment of the present invention will now be described with reference to the accompanying drawings. (Refer to...) Figure 1 and Figure 2 The refrigerator in this embodiment includes:

[0071] Box 7, whose walls form a storage cavity;

[0072] The platinum resistance thermometer 12 (or the platinum resistance thermometer inside the box) is fixed on the box wall and is used to detect the ambient temperature inside the storage cavity.

[0073] The wall is also provided with a standard platinum resistance reserved hole 9, which is used to install a standard platinum resistance 11, and the standard platinum resistance 11 is used to calibrate the platinum resistance 12.

[0074] The main control board 13 is equipped with a standard platinum resistance interface 10 for electrical connection with the standard platinum resistance 11.

[0075] By adding a standard platinum resistance meter (PTM) pre-drilled hole (9) on the enclosure 7 and a standard PTM interface (10) on the main control board 13, the calibration of PTMs for multiple cryogenic medical refrigerators can be solved using only one standard PTM (11), reducing costs. This allows for scheduled temperature calibration of the cryogenic medical refrigerator, resolving the issue of sample discard due to temperature deviations in the PTMs within the refrigerator during the metrology cycle. Furthermore, the close proximity of the standard PTM (11) and PTM (12) reduces temperature deviation between them, making the calibration results more reliable. After calibration, the cryogenic medical refrigerator will operate according to the corrected program, ensuring temperature stability during subsequent operation. In addition, the PTM (12) can be automatically calibrated using a preset calibration program, eliminating the need for manual operation.

[0076] Optionally, the platinum resistance 12 and the standard platinum resistance reserved hole 9 are located on the same wall, and the distance between the location of the standard platinum resistance reserved hole 9 and the platinum resistance location 8 is less than or equal to a preset distance (preferably between 5cm and 10cm).

[0077] Optionally, the standard platinum resistance reserved hole 9 is a stepped hole that penetrates the wall; along the penetration direction of the stepped hole, the stepped hole includes an outer reserved hole 1 and an inner reserved hole 3, wherein the inner reserved hole 3 is opened in the foam layer 2 of the box body; at least a portion of the outer reserved hole 1 is opened in the foam layer 2 of the box body; the inlet diameter of the outer reserved hole 1 is larger than the outlet diameter of the outer reserved hole 1, the outlet diameter of the outer reserved hole 1 is larger than the inlet diameter of the inner reserved hole 3, the inlet diameter of the inner reserved hole 3 is greater than or equal to the outlet diameter of the inner reserved hole 9, and the outlet of the inner reserved hole 3 is connected to the storage cavity.

[0078] Specifically, the platinum resistance 12 is fixed, as is the standard platinum resistance pre-drilled hole 9, while the standard platinum resistance 11 used for calibration is movable. The relative positions of the standard platinum resistance 11 and the platinum resistance 12 can be adjusted by manually adjusting the length of the platinum resistance extending into the chamber, thereby making the temperatures measured by both more closely approximate.

[0079] When calibrating a low-temperature medical refrigerator, the calibrated standard platinum resistance thermometer 11 should be connected to the standard platinum resistance thermometer interface 10 of the main control board 13, and the standard platinum resistance thermometer 11 should be installed in the standard platinum resistance thermometer reserved hole 9, so that the distance between it and the platinum resistance thermometer position 8 is relatively close (preferably between 5cm and 10cm), so as to ensure that the temperature difference between the two platinum resistance thermometers is as small as possible, and the results will be more reliable during calibration.

[0080] Specifically, the standard platinum resistance reserved hole 9 adopts a stepped structure, consisting of an inner reserved hole 3 and an outer reserved hole 1. With the addition of a rubber stopper of appropriate size, it can achieve the purpose of double sealing, reduce the amount of cold leakage in the low-temperature medical refrigerator, and thus ensure the stable operation of the refrigerator.

[0081] Further optional, see Figure 3a , 3b The outer layer reserved hole 1 is a trapezoidal hole, and the inner layer reserved hole 2 is a cylindrical hole.

[0082] Further optional, refer to Figure 5a , 5b The refrigerator also includes a fastener 5, which is used to fix the standard platinum resistance thermometer 11 in the inner layer pre-drilled hole 3. Specifically, the fastener 5 may be a rubber plug adapted to the inner layer pre-drilled hole 3.

[0083] Further optional, refer to Figure 4a , 4bThe refrigerator also includes a seal 4, which is used to seal the outer layer pre-drilled hole 1. Specifically, the seal 4 may be a rubber plug adapted to the outer layer pre-drilled hole 1.

[0084] Specifically, the standard platinum resistance thermometer pre-drilled hole 9 adopts a stepped sealing structure, consisting of an inner pre-drilled hole 3 and an outer pre-drilled hole 1; it is also equipped with two rubber plugs, a platinum resistance thermometer fixing plug and an outer sealing plug. When calibrating with the standard platinum resistance thermometer 11, the platinum resistance thermometer 11 can be fixed in the inner pre-drilled hole 3 using the platinum resistance thermometer fixing plug, and then the outer sealing plug is used to fit against the outer pre-drilled hole 1, which plays a role in heat preservation on the outside and reduces the amount of cold leakage during the calibration process.

[0085] This embodiment also proposes a calibration method for any of the refrigerators mentioned above. When calibrating a low-temperature medical refrigerator, the calibrated standard platinum resistance thermometer 11 should be connected to the standard platinum resistance thermometer interface 10 of the main control board 13, and the standard platinum resistance thermometer 11 should be installed in the standard platinum resistance thermometer reserved hole 9, with its distance from the platinum resistance thermometer position 8 between 5 and 10 cm, so as to ensure that the temperature deviation collected by the two platinum resistance thermometers is as small as possible, thus making the calibration results more reliable.

[0086] The calibration method according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0087] Combination Figure 6 The flowchart of this embodiment shows that the calibration method includes S2 to S5, wherein:

[0088] S2, set at least one calibration temperature;

[0089] S3, when the refrigerator runs to steady state according to each calibration temperature based on at least one calibration temperature, the temperature value of the platinum resistance thermometer and the temperature value of the standard platinum resistance thermometer are obtained one by one, and the temperature difference between the two is calculated;

[0090] S4, calculate the correction value based on the temperature difference;

[0091] S5, calibrate the platinum resistance thermometer according to the calibration value.

[0092] Specifically, in combination Figure 7 The flowchart illustrates that, assuming the standard platinum resistance thermometer 11 is valid and correctly installed, the calibration procedure can be performed. The program provides multiple calibration temperatures, allowing users to perform single-point or multi-point temperature calibration as needed, or to set one or more calibration temperatures. After setting the calibration temperature points, the program will calibrate one by one according to the calibration temperatures, calculate the temperature difference between the platinum resistance thermometer 12 inside the refrigerator and the standard platinum resistance thermometer 11, calculate the correction value based on these temperature differences, and store it. After calibration is completed, the refrigerator can operate according to the corrected temperature of the platinum resistance thermometer 12 inside the refrigerator.

[0093] Specifically, the refrigerator calculates the temperature difference between the platinum resistance thermometer inside the refrigerator and the standard platinum resistance thermometer one by one according to the calibration temperature set during installation. After each temperature point is calibrated, the result is stored. When all the set calibration temperatures have been calibrated, the program will correct the platinum resistance thermometer inside the refrigerator according to the temperature curve of the standard platinum resistance thermometer 11. The correction result will be stored, and the low-temperature medical refrigerator can then operate according to the corrected temperature of the platinum resistance thermometer 12 inside the refrigerator.

[0094] Further, optionally, the platinum resistance thermometer is calibrated based on the correction value, including calculating the corrected temperature using the following formula:

[0095] T N =TT A ;

[0096] Among them, T N T represents the corrected temperature. A The value represents the correction value, and T represents the measured value of the platinum resistance thermometer.

[0097] Alternatively, when a calibration temperature is set, step S4 calculates the correction value using the following formula:

[0098] T A =ΔT1;

[0099] ΔT1=T 1_a -T 1_b ;

[0100] Among them, T A This represents the correction value, ΔT1 represents the temperature difference, and T... 1_a The temperature value of a platinum resistance thermometer is represented by T. 1_b This indicates the temperature value of a standard platinum resistance thermometer.

[0101] Single-point temperature calibration: When the user sets only one calibration temperature T1, the refrigerator will obtain the platinum resistance temperature value T when it runs to a stable state based on the set temperature T1. 1_a and standard platinum resistance temperature value T 1_b Calculate the temperature difference ΔT1 = T between the two platinum resistance thermometers. 1_a -T 1_b and make the correction value T A =ΔT1, to calibrate the platinum resistance thermometer of the refrigerator, so that the calibrated temperature T N =TT A .

[0102] Further optionally, when multiple calibration temperatures are set, step S4 includes S41 to S45, wherein:

[0103] S41, Obtain the maximum calibration temperature T from multiple calibration temperatures. max and minimum calibration temperature T minAnd calculate the difference ΔT between the two. max ;

[0104] S42, Determine the difference ΔT max Is it less than or equal to the first preset value? If so, execute S43.

[0105] S43, determine the temperature range of each calibration temperature among multiple calibration temperatures;

[0106] S44, calculate the average temperature difference corresponding to the calibration temperature within each temperature range;

[0107] S45, calculate the correction value for the corresponding temperature range based on the average temperature difference. Further optionally, S45 specifically involves using the average temperature difference as the correction value for the corresponding temperature range.

[0108] Multi-point temperature calibration: When the user sets more than one calibration temperature, the maximum set temperature difference ΔT must be determined. max =T max -T min Whether it is greater than the first preset value, combined with Figure 8 The flowchart illustrates the process, with the first preset value preferably being 20℃, and calibration is performed under two conditions. At the maximum calibration temperature T... max and minimum calibration temperature T min The difference ΔT max When the temperature is ≤20℃, multiple calibration temperatures are divided into different temperature ranges. Taking two temperature ranges as an example, one is...

[0109] (1)△T max ≤20℃.

[0110] Multiple calibration temperatures are divided into different temperature ranges, with two temperature ranges T. L and T U For example, T min ≤T L <T min +10℃, T min +10℃≤T U ≤T max After running and stabilizing at the set calibration temperature, the temperature T of the platinum resistance thermometer 12 was obtained. i_a And the temperature T of the standard platinum resistance 11 at this time i_b And calculate the difference.

[0111] △T i =T i_a -T i_b Calculate the temperature range T L and T U The average temperature difference ΔT at all calibration temperature points within the system i_L and △T i_UMake the correction value T A_L =△T i_L T A_U =△T i_U For low-temperature medical refrigerators in the temperature range T L and T U Perform correction to make T N_L =TT A_L T N_U =TT A_U .

[0112] For example, a total of 6 calibration temperatures are set, within the temperature range T. L There are 3 calibration temperatures, and the temperature differences between the 3 calibration temperatures are ΔT1, ΔT2, and ΔT3, respectively. i_L = (△T1 + △T2 + △T3) / 3; within the temperature range T U There are 3 calibration temperatures, and the temperature differences between the 3 calibration temperatures are ΔT4, ΔT5, and ΔT6. i_U = (△T4+△T5+△T6) / 3.

[0113] (2)△T max ≤20℃.

[0114] Further, optionally, when the difference ΔT is determined max When the value is greater than the first preset value, step S4 further includes S46 to S48, wherein:

[0115] S46, Calculate multiple calibration temperatures (using ΔT) i The average value (denoted by ΔT) αi (represented by σ), and calculate the standard deviation (represented by σ);

[0116] S47, screening temperature difference △T i and average value △T αi And the calibration temperature that satisfies the preset condition, and calculate the average temperature difference ΔT corresponding to all calibration temperatures that satisfy the preset condition. 3σ ;

[0117] S48, calculate the average temperature difference ΔT corresponding to all calibration temperatures that meet the preset conditions. 3σ As a correction value.

[0118] Specifically, the refrigerator operates according to the set calibration temperature and gradually reaches a stable temperature, obtaining the platinum resistance temperature T. i_a And the temperature T of the standard platinum resistance at this time i_b And calculate the difference ΔT i =T i_a -T i_b Calculate the arithmetic mean and standard deviation Determine if the difference satisfies |△T i -△T ai If |<3σ, calculate the average temperature difference △T from all temperature points that meet the condition. 3σ Make the correction value T A =△T 3σ The temperature of the low-temperature medical refrigerator is calibrated to achieve the corrected temperature T. N =TT A Where T represents the actual temperature of the platinum resistance thermometer. After calibration, the temperature of the calibrated platinum resistance thermometer is used for control, i.e., Tcalibrated. N =TT A The temperature value of the platinum resistance thermometer is minus the correction value.

[0119] Further optionally, before setting at least one calibration temperature, the calibration method further includes S10 to S12, wherein:

[0120] S10, in response to the input signal of the standard platinum resistance thermometer, acquires the temperature value T of the standard platinum resistance thermometer. 0_a Temperature value T of platinum resistance 0_b And calculate the difference between the two, ΔT0;

[0121] S11, determine whether the difference ΔT0 is greater than or equal to the second preset value; if so, execute S12;

[0122] S12, Stop calibration.

[0123] Specifically, the measured value of the standard platinum resistance thermometer is only reliable and valid when it is properly installed, thus ensuring calibration accuracy. Therefore, the installation of the standard platinum resistance thermometer must be checked before calibration. When the standard platinum resistance thermometer is installed into the pre-drilled hole and connected to the standard platinum resistance thermometer interface on the main control board, a signal will be generated (defined as an access signal). This does not mean that the standard platinum resistance thermometer is properly installed. Further checks are needed to verify its proper installation. This is achieved by judging the measured value T of the standard platinum resistance thermometer. 0_a The measured value T of the platinum resistance thermometer 0_b Does the difference ΔT0 between them satisfy ≥ the second preset value, combined with Figure 8 The flowchart illustrates that the second preset value is preferably 10℃, used to determine if the installation is correct. If the result is yes, the installation is considered correct, and the calibration process can proceed. Conversely, if the result is no, calibration is stopped, and an error message indicating incorrect installation is displayed.

[0124] Further, optionally, the calibration method also includes S13:

[0125] S13, activate the refrigerator display interface to display the test data during the calibration process.

[0126] Specifically, in combination Figure 7The flowchart illustrates that if no standard platinum resistance resistor 11 is detected at the standard platinum resistance interface 10, the calibration interface on the display screen 14 is closed by default. After the standard platinum resistance resistor 11 is connected, the calibration interface on the display screen 14 is activated. After the calibration interface is activated, it will first detect the temperature of the standard platinum resistance resistor 11 and compare it with the detected temperature of the platinum resistance resistor 12. If the temperature difference between the two exceeds the second preset value, the calibration program will be paused, and the display screen 14 will display "Standard platinum resistance resistor temperature abnormal". The user needs to confirm that the standard platinum resistance resistor 11 is valid and has been correctly installed before continuing the calibration program.

[0127] Furthermore, after calibration, the system will continue to check whether there is a platinum resistor in the standard platinum resistance interface 10. If the platinum resistor is not disconnected, the calibration interface will remain active until the platinum resistor is disconnected, the calibration interface will be closed, and the entire calibration process will end.

[0128] This embodiment also provides a refrigerator calibration device, which includes one or more processors and a non-transitory computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement any of the methods described above.

[0129] The refrigerator provided in this embodiment uses a pre-drilled hole in the cabinet and a pre-drilled standard platinum resistance interface on the main board, which allows the calibration of platinum resistance in multiple low-temperature medical refrigerators to be solved using only one standard platinum resistance. The double-sealed structure reduces cold leakage through the pre-drilled hole. The preset calibration program can automatically calibrate the platinum resistance inside the refrigerator, effectively improving calibration accuracy and eliminating calibration errors that may occur due to human operation. In addition, when the temperature difference between the standard platinum resistance and the platinum resistance inside the refrigerator exceeds a set threshold, an abnormal alarm is triggered to ensure calibration accuracy.

[0130] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0131] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0132] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A calibration method for a refrigerator, characterized in that, The refrigerator includes: The box-like structure has walls that form a storage cavity. A platinum resistance thermometer, fixed to the wall, is used to detect the ambient temperature inside the storage cavity; The wall is also provided with a standard platinum resistance reserved hole, which is used to install a standard platinum resistance and to calibrate the platinum resistance. The main control board is equipped with a standard platinum resistance interface for electrical connection with the standard platinum resistance. The calibration method includes: Set multiple calibration temperatures; When the refrigerator reaches a steady state according to each of the plurality of calibration temperatures, the temperature values ​​of the platinum resistance thermometer and the standard platinum resistance thermometer are acquired one by one, and the temperature difference between the two is calculated. Calculate the correction value based on the temperature difference; The platinum resistance thermometer is calibrated according to the correction value; When multiple calibration temperatures are set, the calculation of the correction value based on the temperature difference includes: Obtain the maximum calibration temperature T from the plurality of calibration temperatures. max and minimum calibration temperature T min And calculate the difference between the two. T max ; Determine the difference T max Is it less than or equal to the first preset value? If so, divide the multiple calibration temperatures into different temperature ranges; calculate the average temperature difference corresponding to the calibration temperature within each temperature range; The correction value for the corresponding temperature range is calculated based on the average temperature difference.

2. The calibration method as described in claim 1, characterized in that, The step of calculating the correction value for the corresponding temperature range based on the average temperature difference includes: The average temperature difference is used as the correction value for the corresponding temperature range.

3. The calibration method as described in claim 2, characterized in that, When the difference △T is determined max When the temperature difference is greater than the first preset value, the step of calculating the correction value based on the temperature difference further includes: Calculate the average value of the temperature differences between the multiple calibration temperatures, and calculate the standard deviation; Filter the calibration temperatures that satisfy the preset conditions for the temperature difference, the average value, and the standard deviation, and calculate the average temperature difference corresponding to all calibration temperatures that satisfy the preset conditions; The average temperature difference corresponding to all calibration temperatures that meet the preset conditions is used as the correction value.

4. The calibration method as described in claim 3, characterized in that, The calibration method further includes: The average value is calculated using the following formula: ; The standard deviation is calculated using the following formula: ; The preset condition is: |△T i -△T ai |<3σ; Among them, △T αi Denotes the average value, △T i The temperature difference is represented by , n represents the number of calibration temperatures, and σ represents the standard deviation.

5. The calibration method as described in claim 1, characterized in that, The calibration of the platinum resistance thermometer based on the correction value includes calculating the corrected temperature using the following formula: T N =T-T A ; Among them, T N T represents the corrected temperature. A The value represents the correction value, and T represents the actual temperature of the platinum resistance thermometer.

6. The calibration method according to any one of claims 1-5, characterized in that, Before setting the plurality of calibration temperatures, the calibration method further includes: In response to the access signal of the standard platinum resistance thermometer, the temperature value T of the standard platinum resistance thermometer is acquired. 0_a The temperature value T of the platinum resistance 0_b And calculate the difference between the two, ΔT0; Determine whether the difference ΔT0 is greater than or equal to the second preset value; if so, stop the calibration.

7. The calibration method as described in claim 6, characterized in that, The calibration method further includes: In response to the access signal of the standard platinum resistance thermometer, the refrigerator display interface is activated to display the test data during the calibration process.

8. A calibration device for a refrigerator, characterized in that, It includes one or more processors and a non-transitory computer-readable storage medium storing program instructions, wherein when the one or more processors execute the program instructions, the one or more processors are configured to implement the method according to any one of claims 1-7.

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