Equipment with heating function and its temperature compensation method

Abstract

This invention relates to the field of heating equipment technology, specifically providing a device with heating function and its temperature compensation method. The aim is to solve the problem that existing devices with heating function suffer from temperature sensor limitations due to their own structure, leading to a deviation between the temperature measured by the temperature sensor and the actual internal temperature of the device, thus preventing the device from reaching the target temperature. To this end, the device with heating function of this invention includes a heating module capable of heating the device and a temperature sensor capable of detecting the device's temperature. The temperature compensation method includes: controlling the heating module to heat the device to the target temperature Q2 based on data Q1 obtained from the temperature sensor; recording the temperature sensor data as P1 after Q1 reaches Q2; recording the temperature sensor data as P2 after a time T1; calculating the difference ΔP between P1 and P2; and reassigning the sum of Q1 and ΔP to Q1, thereby compensating for the deviation between the internal temperature of the device and the target temperature.

Description

Technical Field

[0001] This invention relates to the field of heating equipment technology, specifically providing a device with heating function and its temperature compensation method. Background Technology

[0002] Existing heating devices typically require a temperature sensor to detect the heating temperature and control the heating module's state. However, temperature sensors can be affected by ambient temperature, leading to discrepancies between the detected and actual temperatures. For example, in constant temperature incubators commonly use PT100 platinum resistance sensors. Due to the sensor's structure, the PT100 is usually inserted into the incubator's inner chamber and secured with nuts at the front and back, leaving the rear half of the PT100 probe protruding slightly outside the chamber.

[0003] When the ambient temperature changes, the temperature of the PT100 probe outside the chamber changes accordingly, thus affecting the overall temperature of the PT100 probe. The temperature change of the PT100 probe is fed back to the main board, and the displayed temperature will also change. At this time, the displayed temperature deviates from the set value. In order to ensure that the displayed temperature is consistent with the set value, the program controls the heating block to increase or decrease the power, causing the overall temperature inside the chamber to rise or fall. The final result is that the displayed temperature is not affected, but the temperature inside the chamber shifts, causing the temperature inside the chamber to deviate from the target temperature.

[0004] Accordingly, there is a need in this field to propose a new method for environmental temperature compensation to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the temperature sensor of existing heating devices is limited by its own structure, resulting in a deviation between the temperature measured by the temperature sensor and the actual temperature inside the device, thus making it impossible for the device to reach the target temperature.

[0006] In a first aspect, the present invention provides a temperature compensation method for a device with a heating function, the device including a heating module capable of heating the device and a temperature sensor capable of detecting the temperature of the device, the temperature compensation method including: acquiring data Q1 from the temperature sensor; calculating the difference ΔQ between a target temperature Q2 and Q1; comparing ΔQ with a first preset difference A; selectively recording the data of the temperature sensor as P1 based on the comparison result of ΔQ and A, and recording the data of the temperature sensor as P2 after each time T1; calculating the difference ΔP between P1 and P2; comparing the absolute value of ΔP with a second preset difference B; and selectively reassigning the sum of Q1 and ΔP to Q1 based on the comparison result of ΔP and B.

[0007] In a specific embodiment of the temperature compensation method for a device with heating function described above, the step "selectively recording the data of the temperature sensor as P1 based on the comparison result of ΔQ and A, and recording the data of the temperature sensor as P2 after each time T1" further includes: when ΔQ is less than or equal to the first preset difference A, recording the data of the temperature sensor as P1, and recording the data of the temperature sensor as P2 after each time T1.

[0008] In the specific implementation of the temperature compensation method for the above-mentioned device with heating function, the step "when ΔQ is less than or equal to the first preset difference A, record the data of the temperature sensor as P1, and after time T1, record the data of the temperature sensor as P2" further includes: when ΔQ is less than or equal to the first preset difference A and the duration reaches T2, record the data of the temperature sensor as P1, and after time T1, record the data of the temperature sensor as P2.

[0009] In a specific embodiment of the temperature compensation method for a device with a heating function described above, the temperature compensation method further includes: after acquiring the data Q1 from the temperature sensor, comparing Q1 with the target temperature Q2; and selectively controlling the heating module to perform heating based on the comparison result of Q1 and Q2.

[0010] In a specific embodiment of the temperature compensation method for a device with a heating function described above, the step "selectively controlling the heating module to heat according to the judgment result of Q1 and Q2" further includes: when Q2 is greater than Q1, controlling the heating module to heat.

[0011] In a specific embodiment of the temperature compensation method for a device with heating function described above, the device further includes a door module, and the temperature compensation method further includes: after acquiring the data Q1 from the temperature sensor, determining whether the door module is closed; when the door module is closed, comparing Q1 with the target temperature Q2.

[0012] In a specific embodiment of the temperature compensation method for a device with a heating function described above, the device further includes a door module, and the temperature compensation method further includes: after acquiring the data Q1 from the temperature sensor, determining whether the door module is closed; when the door module is open, controlling the heating module not to heat.

[0013] In a specific embodiment of the temperature compensation method for a device with heating function described above, the step "acquiring the data Q1 of the temperature sensor" further includes: acquiring the data Q1 of the temperature sensor once every time T3 elapses, where T3 < T1 and T3 < T2.

[0014] In a specific embodiment of the temperature compensation method for a device with heating function described above, the step "selectively reassigning the sum of Q1 and ΔP to Q1 based on the comparison result of ΔP and B" further includes: when the absolute value of ΔP is greater than or equal to the second preset difference B, reassigning the sum of Q1 and ΔP to Q1.

[0015] In a specific embodiment of the temperature compensation method for a device with heating function described above, the step "selectively reassigning the sum of Q1 and ΔP to Q1 based on the comparison result of ΔP and B" further includes: when the absolute value of ΔP is less than the second preset difference B, assigning ΔP = 0 to ΔP, and reassigning the sum of Q1 and ΔP to Q1.

[0016] By employing the above technical solution, the present invention can compensate for the deviation between the internal temperature of the device and the target temperature caused by erroneous temperature measurements from the temperature sensor. Specifically, during the heating process, the internal temperature Q1 of the device is first obtained through the temperature sensor. Then, Q1 is compared with the target temperature Q2. When Q1 is less than Q2, the heating module is controlled to continue heating. When Q1 reaches near Q2 and the difference ΔQ between Q2 and Q1 is less than a first preset difference A, the internal temperature of the device is considered to have reached the target temperature. At this time, the heating module stops heating and the temperature sensor data is recorded as P1 (here, P1 can be approximately equal to Q2). Every time T1 elapses, the temperature sensor data at this time is recorded as P2 (that is, Q1 at this time). P1 and P2 are compared to obtain the difference ΔP. Here, ΔP is the change in the temperature sensor data measured by the part of the temperature sensor remaining outside the device after heating stops due to changes in the external environment, and not the change in the actual internal temperature of the device (here, the decrease in external temperature is used as an example for explanation). A decrease in temperature causes the temperature data acquired by the temperature sensor to be lower than the target temperature Q2. Since the data acquired by the temperature sensor can control the heating state of the heating module, when the temperature data Q1 measured by the temperature sensor is less than the target temperature Q2 and the difference ΔQ between Q2 and Q1 is greater than the first preset difference A, the program determines that the internal temperature of the device has not reached the target temperature Q2. Therefore, it controls the heating module to start heating the device. However, since the internal temperature of the device itself has not changed and is still near the target temperature Q2, this will cause the internal temperature of the device to exceed the target temperature Q2. Therefore, to avoid this situation, in this embodiment, the sum of the change ΔP of the temperature data measured by the temperature sensor due to the change of the external environment and the temperature data Q1 measured by the temperature sensor is reassigned to Q1. In this way, the value of Q1 is the temperature value before the change of the external temperature, so that the difference ΔQ between the target temperature Q2 and Q1 is less than the first preset difference A again, causing the heating module to stop heating and ensuring that the internal temperature of the device is near the target temperature Q2. Attached Figure Description

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a flowchart of the main steps of the temperature compensation method for a device with a heating function according to the present invention;

[0019] Figure 2 This is a detailed flowchart of the first embodiment of the present invention;

[0020] Figure 3 This is a detailed flowchart of the second embodiment of the present invention;

[0021] Figure 4 This is a detailed flowchart of the third embodiment of the present invention. Detailed Implementation

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications. For example, although the specification describes it as a constant temperature chamber, the present invention can obviously employ various other devices with heating functions.

[0023] It should be noted that, in the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] like Figure 1 , Figure 2 As shown, to address the problem that existing temperature sensors in heating devices are limited by their own structure, causing a deviation between the temperature measured by the sensor and the actual internal temperature of the device, thus preventing the device from reaching the target temperature, the present invention, using a constant temperature chamber as an example, includes a heating module capable of heating the chamber and a temperature sensor capable of detecting the internal temperature of the chamber. The temperature compensation method includes:

[0025] S01, Obtain data Q1 from the temperature sensor;

[0026] S02. Compare the magnitudes of Q1 and the target temperature Q2;

[0027] S03. Selectively control the heating module to heat according to the comparison result of Q1 and Q2;

[0028] Step S03 further includes:

[0029] S031. When Q2 is greater than Q1, control the heating module to heat;

[0030] S04. Calculate the difference ΔQ between the target temperatures Q2 and Q1;

[0031] S05. Compare the magnitude of ΔQ with the first preset difference A;

[0032] S06. Based on the comparison result of ΔQ and A, selectively record the temperature sensor data as P1, and record the temperature sensor data as P2 after each time T1.

[0033] Step S06 further includes:

[0034] S061. When ΔQ is less than or equal to the first preset difference A, record the temperature sensor data as P1, and record the temperature sensor data as P2 after each time T1.

[0035] S07. Calculate the difference ΔP between P1 and P2;

[0036] S08. Compare the absolute value of ΔP with the second preset difference B;

[0037] S09. Based on the comparison result of ΔP and B, selectively reassign the sum of Q1 and ΔP to Q1.

[0038] Step S09 further includes:

[0039] S091. When the absolute value of ΔP is greater than or equal to the second preset difference B, the sum of Q1 and ΔP is reassigned to Q1.

[0040] S092. When the absolute value of ΔP is less than the second preset difference B, assign ΔP = 0 to ΔP, and reassign the sum of Q1 and ΔP to Q1.

[0041] First, it should be noted that the operation of the constant temperature chamber is roughly divided into two parts. The first part is the heating process, where the constant temperature chamber reaches near the target temperature value under the heating of the heating module. The second part is the temperature holding process, where the constant temperature chamber maintains a constant temperature. In the above implementation method, during the heating process, the internal temperature Q1 of the constant temperature chamber is first obtained through a temperature sensor. Then, Q1 is compared with the target temperature Q2. When Q1 is less than Q2, the heating module is controlled to continue heating. When Q1 reaches near Q2 and the difference ΔQ between Q2 and Q1 is less than a first preset difference A, the internal temperature of the constant temperature chamber is considered to have reached the target temperature. At this point, the heating module stops heating, and the temperature sensor data is recorded as P1 (where P1 is the temperature sensor value). Q1 can be approximated as Q2). After each time T1, the temperature sensor data is recorded as P2 (which is Q1 at this time). P1 and P2 are compared and the difference ΔP is obtained. ΔP is the change in the temperature sensor data measured by the part of the temperature sensor remaining outside the constant temperature chamber after heating stops, due to changes in the external environment, and not the actual temperature change inside the constant temperature chamber (here, we take the decrease in external temperature as an example). The decrease in external temperature causes the temperature data obtained by the temperature sensor to be lower. Since the data obtained by the temperature sensor can control the heating state of the heating module, when the temperature data Q1 measured by the temperature sensor is less than the target temperature Q2 and the difference ΔQ between Q2 and Q1 is greater than the first preset value, the temperature sensor will detect the temperature sensor readings. When the temperature difference reaches A, the heating module will start heating the constant temperature chamber, which will cause the temperature inside the chamber to exceed the target temperature Q2. Therefore, to avoid this situation, in this embodiment, the sum of the change ΔP in the temperature sensor data measured by the temperature sensor due to changes in the external environment and the temperature data Q1 measured by the temperature sensor is reassigned to Q1. In this way, the value of Q1 is the temperature value before the change in the external temperature, thus completing the deviation correction of the temperature detected by the temperature sensor. This makes the difference between the target temperature Q2 and Q1 less than the first preset difference A again, causing the heating module to stop heating and ensuring that the temperature inside the constant temperature chamber is near the target temperature Q2. Based on this, this embodiment also... Before reassigning the sum of ΔP and Q1 to Q1, the absolute value of ΔP is checked. If the absolute value of ΔP is greater than or equal to the second preset difference B, the sum of Q1 and ΔP is reassigned to Q1 to complete the deviation correction. If the absolute value of ΔP is less than the second preset difference B, ΔP = 0 is assigned to ΔP, and the sum of Q1 and ΔP is reassigned to Q1. The purpose of this setting is that when the value of ΔP is so small that even if the external environment changes, this change will not cause the difference ΔQ between Q2 and Q1 to exceed the first preset difference A, the change in the temperature sensor reading caused by the external environment can be ignored. Only when the value of ΔP is large enough, that is, when the temperature change of the external environment has a significant impact on the temperature sensor reading, can the change in the temperature sensor reading be ignored.Only then is the sum of ΔP and Q1 reassigned to Q1 for deviation correction. This reduces the frequency of deviation correction execution while ensuring the functionality of deviation correction, thus lowering the computational requirements of the controller.

[0042] In addition, regarding the relationship between the first preset difference A and the second preset difference B, those skilled in the art will understand that the second preset difference B should be less than the first preset difference A. In this way, when ΔP is greater than or equal to B, ΔQ will not be greater than A. Therefore, deviation correction will be performed first, and the heating module will not be activated for heating.

[0043] Furthermore, the above embodiments are described using the example of a decrease in external temperature. Those skilled in the art will understand that when the external temperature rises, the temperature sensor reading will be higher than the temperature inside the constant temperature chamber. Since the heating module does not have the ability to cool the constant temperature chamber, this situation is not within the adjustment range of the heating module, and therefore the temperature inside the constant temperature chamber will not change, thus avoiding the problem mentioned in this invention. Moreover, under normal circumstances, the temperature inside the constant temperature chamber is reached after being heated by the heating module, and the external ambient temperature generally does not reach this temperature. Therefore, when the temperature sensor is already at a relatively high temperature, the increase in external temperature will not have a significant impact on the temperature sensor reading. Therefore, this situation is not considered in this embodiment.

[0044] The main embodiments of the present invention have been described above. Next, some preferred embodiments of the present invention will be described.

[0045] The following reference Figure 1 , Figure 3 In one possible implementation, step S061 further includes:

[0046] S0611. When ΔQ is less than or equal to the first preset difference A and the duration reaches T2, record the temperature sensor data as P1, and after time T1, record the temperature sensor data as P2.

[0047] Step S01 further includes:

[0048] S011. Acquire temperature sensor data Q1 once every time time T3 elapses, where T3 < T1 and T3 < T2.

[0049] In the above implementation, the heating module stops heating and the temperature sensor data is recorded as P1 only when ΔQ is less than or equal to the first preset difference A and the duration reaches T2. After time T1, the temperature sensor data at this time is recorded as P2. Since the temperature sensor does not instantly reach a stable temperature and remain unchanged when collecting the temperature of the constant temperature chamber, the temperature inside the constant temperature chamber usually reaches a temperature value slightly exceeding the target temperature under the heating of the heating module, and then slowly drops to near the target temperature and fluctuates around the target temperature, eventually stabilizing near the target temperature. In this process, the temperature change is a relatively slow process. Therefore, in this implementation, when the temperature Q1 of the constant temperature chamber reaches near the target temperature Q2, that is, when ΔQ is less than or equal to the first preset difference A, the condition of judging whether the duration reaches T2 is added. When the duration reaches T2, it means that the temperature inside the constant temperature chamber has stabilized near the target temperature and no longer fluctuates within a large range. At this time, the heating process is completed, and P1 and the subsequent P2 can be recorded to prepare for possible temperature deviation correction in the future.

[0050] The advantages of the above implementation are: it avoids the situation where temperature fluctuations within the constant temperature chamber lead to the conclusion that the absolute value of ΔP is greater than or equal to the second preset difference B, even if the external environment has not changed, thus incorrectly correcting the deviation. Furthermore, since the duration for which ΔQ is less than or equal to the first preset difference A needs to reach T2, the temperature within the constant temperature chamber needs to be collected multiple times within the duration of T2. Therefore, the period T3 for acquiring the temperature sensor data Q1 should be less than T2. ​​On the other hand, since P2 needs to be acquired every T1 to detect whether the temperature sensor reading has deviated, and the temperature deviation is caused by changes in the external environment temperature, while the acquisition of Q1 every T3 is caused by the heating module during the heating process, the changes in the temperature sensor reading caused by the external environment are slower than those caused by the heating module. Therefore, it is not necessary to acquire P2 too frequently. The acquisition period for P2 should be longer than the acquisition period for Q1. Therefore, in this implementation, T3 is set to < T1.

[0051] In one possible implementation, the incubator also includes a door module, such as... Figure 1 , Figure 4 As shown, after step S01, the following steps are also included:

[0052] S012. Determine if the door module is closed;

[0053] S013. When the door module is in the closed state, compare the magnitude of Q1 with the target temperature Q2.

[0054] S014. When the door module is in the open state, the heating module is controlled not to heat.

[0055] Since the application of this invention is a constant temperature chamber, certain requirements are placed on the sealing performance of the constant temperature chamber during the heating process. In the above-described embodiment, a step of judging the opening and closing state of the door module of the constant temperature chamber is added before the heating module is controlled to heat. When the door module is closed, the difference between Q1 and the target temperature Q2 is judged. When Q2 is greater than Q1, the heating module is controlled to heat. When the door module is open, the heating module is controlled not to heat.

[0056] The advantages of the above implementation method are: it ensures that the thermostat is heated only when the door module is closed, which not only ensures the heating efficiency of the thermostat and avoids heat loss due to the door module being open, but also avoids the possibility of burns to users that may occur when the door module is open during the heating process.

[0057] It should be noted that the above embodiments are merely used to illustrate the principles of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the above structure so that the present invention can be applied to more specific application scenarios.

[0058] Finally, it should be noted that although this invention is described using a constant temperature box as an example, the device with heating function of this invention can obviously also be other devices. For example, it can also be an oven, a microwave oven, etc.

[0059] Those skilled in the art will understand that the aforementioned heating device also includes other known structures, such as processors, controllers, and memories. The memories include, but are not limited to, random access memory, flash memory, read-only memory, programmable read-only memory, volatile memory, non-volatile memory, serial memory, parallel memory, or registers. The processors include, but are not limited to, CPLD / FPGA, DSP, ARM processors, and MIPS processors. To avoid unnecessarily obscuring the embodiments of this disclosure, these known structures are not shown in the accompanying drawings.

[0060] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A temperature compensation method for a device with a heating function, characterized in that, The device includes a heating module capable of heating the device and a temperature sensor capable of detecting the temperature of the device, and the temperature compensation method includes: Acquire the data Q1 from the temperature sensor; Calculate the difference ΔQ between the target temperatures Q2 and Q1; Compare the magnitude of ΔQ with the first preset difference A; Based on the comparison result of ΔQ and A, the data of the temperature sensor is selectively recorded as P1, and the data of the temperature sensor at this time is recorded as P2 after each time T1. Calculate the difference ΔP between P1 and P2; Compare the absolute value of ΔP with the second preset difference B; Based on the comparison results of ΔP and B, the sum of Q1 and ΔP is selectively reassigned to Q1; The step "selectively recording the temperature sensor data as P1 based on the comparison result of ΔQ and A, and recording the temperature sensor data as P2 after each time T1" further includes: When ΔQ is less than or equal to the first preset difference A, the heating module stops heating and the data of the temperature sensor is recorded as P1. After time T1, the data of the temperature sensor at this time is recorded as P2. The step "selectively reassigning the sum of Q1 and ΔP to Q1 based on the comparison result of ΔP and B" further includes: When the absolute value of ΔP is greater than or equal to the second preset difference B, the sum of Q1 and ΔP is reassigned to Q1; When the absolute value of ΔP is less than the second preset difference B, ΔP=0 is assigned to ΔP, and the sum of Q1 and ΔP is reassigned to Q1.

2. The temperature compensation method according to claim 1, characterized in that, The step "when ΔQ is less than or equal to the first preset difference A, record the data of the temperature sensor as P1, and after time T1, record the data of the temperature sensor at this time as P2" further includes: When ΔQ is less than or equal to the first preset difference A and the duration reaches T2, the data of the temperature sensor is recorded as P1, and after time T1, the data of the temperature sensor at this time is recorded as P2.

3. The temperature compensation method according to any one of claims 1 to 2, characterized in that, The temperature compensation method further includes: After acquiring the data Q1 from the temperature sensor, compare Q1 with the target temperature Q2. The heating module is selectively controlled to heat based on the comparison results of Q1 and Q2.

4. The temperature compensation method according to claim 3, characterized in that, The step "selectively controlling the heating module to heat according to the judgment results of Q1 and Q2" further includes: When Q2 is greater than Q1, the heating module is controlled to heat.

5. The temperature compensation method according to any one of claims 1 to 2, characterized in that, The device also includes a gate module, and the temperature compensation method further includes: After acquiring the temperature sensor data Q1, determine whether the door module is closed; When the gate module is in the closed state, compare the magnitude of Q1 with the target temperature Q2.

6. The temperature compensation method according to any one of claims 1 to 2, characterized in that, The device also includes a gate module, and the temperature compensation method further includes: After acquiring the temperature sensor data Q1, determine whether the door module is closed; When the door module is in the open state, the heating module is controlled not to heat.

7. The temperature compensation method according to claim 2, characterized in that, The step "acquiring data Q1 from the temperature sensor" further includes: The temperature sensor acquires data Q1 once every time time T3 elapses, where T3 < T1 and T3 < T2.

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