Temperature measurement precision recovery method and steam oven

By inputting steam into the heating chamber of the steam oven to reach saturation state, penetrating the metal shell of the temperature measuring probe to remove stains, solving the problem of decreasing temperature measurement accuracy, and achieving accurate temperature control and improving the cooking effect of the steam oven.

CN119915402APending Publication Date: 2025-05-02GUANGDONG SHUNDE OUNING ELECTRICAL APPLIANCE CO LTD
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Patent Information

Application Number
CN202411932860.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-05-02

AI Technical Summary

Technical Problem

After the steam oven is used for a long time, the temperature measurement accuracy of the temperature measuring probe will gradually decrease, resulting in poor cooking results.

Method used

By inputting steam into the heating chamber of the steam oven, it reaches a saturation state, penetrates the metal shell of the temperature measuring probe, shocks and shocks the stain and removes it, and then restores the thermocouple resistance value to the initial state.

Benefits of technology

Restore the temperature measurement accuracy of the temperature measuring probe, ensure accurate temperature control of the steam oven, and improve cooking effect and user satisfaction.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of steam oven temperature measurement precision adjustment, in particular to a temperature measurement precision recovery method and a steam oven, and the method comprises the following steps: S1, inputting steam into a heating cavity of the steam oven by a steam generator of the steam oven, and enabling the interior of the heating cavity to reach a steam saturation state; s2, judging whether the temperature measured by the temperature measuring probe is 99 + / -2 DEG C or not, if so, stopping inputting the steam, and then entering the step S3; otherwise, continuously conveying the steam; and S3, ending. The defect that in the prior art, the temperature measurement precision of a temperature measurement probe can be gradually reduced, and consequently the cooking effect is affected is overcome, steam in the saturated state penetrates through the metal shell of the temperature measurement probe, and the influence of stains on the heat transfer effect of the metal shell can be eliminated; meanwhile, the steam can influence the resistance value of a thermocouple of the temperature measuring probe in the metal shell, the temperature measuring precision of the temperature measuring probe is finally recovered to the initial level, and the cooking effect of the steam oven and the use satisfaction degree of a user are improved.
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Description

Technical Field

[0001] The present invention relates to the technical field of temperature measurement accuracy adjustment of steam ovens, and more specifically, to a temperature measurement accuracy recovery method and a steam oven. Background Art

[0002] A steam oven is a cooking appliance that combines the functions of a traditional oven and steam cooking. Some existing steam ovens are equipped with thermocouple temperature sensors. The temperature probe of the thermocouple temperature sensor is set in the heating chamber of the steam oven to measure the temperature. The temperature probe consists of a thermocouple and a metal shell surrounding the thermocouple. The metal shell transfers the heat in the heating chamber to the thermocouple inside the metal shell. The resistance of the thermocouple changes with the temperature. Different resistance values ​​correspond to different temperature results.

[0003] Using a temperature probe to measure the temperature of the heating chamber can help the heating tube to accurately control the temperature of the heating chamber at different heating stages. The specific process of temperature control is to first determine the hot and cold machine based on the initial temperature in the heating chamber, and then heat it to the starting temperature at full power, and then heat it from the starting temperature in a combination of temperature segments and time periods, so that the real-time temperature in the heating chamber approaches or reaches the target temperature. On the one hand, during the heating process, the heating time and stop time are adjusted according to the change of real-time temperature through the combination of temperature segments and temperature cycles, so that the temperature control is more accurate and the temperature deviation is smaller; on the other hand, the food can be quickly heated to a suitable temperature through the first heating, which can shorten the time required to reach the target temperature. Subsequently, the progressive heating method combining temperature segments and time periods is conducive to providing suitable time for various reaction changes of the ingredients, so that the food can undergo corresponding changes in different temperature ranges during the heating process, achieving better color, aroma and taste.

[0004] However, after the steam oven has been in operation for a certain period of time, impurities such as grease and water will penetrate into the inner cavity of the metal shell through the seal of the metal shell, causing a certain amount of dirt and water stains to adhere to the inner wall of the metal shell. Moreover, after the steam oven has been used for a long time, the metal shell or sealing material of the temperature probe may age, resulting in tiny cracks or pores, and grease can easily enter the metal shell through these gaps and adhere to the inner wall of the metal shell. These dirt and water stains will affect the heat transfer effect of the metal shell, causing the temperature sensed by the thermocouple to deviate from the actual temperature in the heating cavity. As the steam oven is used for a longer time, there will be more and more dirt and water stains, and the deviation will become larger and larger. In addition, after continuous high and low temperature detection, the thermocouple resistance of the temperature probe will change, and the measured results will also have a certain error, which will ultimately lead to a significant reduction in the cooking effect and affect user satisfaction. Summary of the invention

[0005] In view of the problem in the prior art that the temperature measurement accuracy of the temperature measuring probe will gradually decrease and eventually affect the cooking effect, the present invention provides a temperature measurement accuracy recovery method and a steam oven, which can restore the temperature measurement accuracy of the temperature measuring probe.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0007] A method for restoring temperature measurement accuracy comprises the following steps:

[0008] S1: The steam generator of the steam oven inputs steam into the heating chamber of the steam oven, so that the heating chamber reaches a steam saturated state, in which the steam pressure in the heating chamber of the steam oven is substantially stable; proceed to step S2.

[0009] S2: Determine whether the temperature measured by the temperature measuring probe is within 99±2℃. If so, it means that the thermocouple resistance of the temperature measuring probe has returned to the initial value. At this time, stop inputting steam and enter step S3; otherwise, it means that the thermocouple resistance of the temperature measuring probe has not returned to the initial value, and continue to deliver steam. When the steam oven leaves the factory, the temperature measurement result of the temperature measuring probe is generally within the range of ±2℃ of the actual temperature. After the steam oven has been used for a period of time, the temperature measurement result of the temperature measuring probe will deviate from the range of ±2℃ of the actual temperature. When the steam in the heating chamber of the steam oven reaches a saturated state, the steam temperature is around 99℃. Therefore, when the temperature measured by the temperature measuring probe is within the range of 99±2℃, it means that the thermocouple resistance of the temperature measuring probe has returned to the initial value, and the temperature measurement accuracy of the temperature measuring probe has returned to the initial level.

[0010] S3: End.

[0011] In the above technical solution, when the steam reaches the steam saturation state in the heating chamber, it has a strong penetration characteristic and can penetrate the metal shell of the temperature measuring probe. The steam entering the metal shell can shock and impact the stains on the inner wall of the metal shell, so that the stains are separated from the inner wall of the metal shell, thereby eliminating the influence of these stains on the heat transfer effect of the metal shell. In addition, the steam entering the metal shell will affect the resistance of the thermocouple of the temperature measuring probe. Combining the above two processes, the thermocouple resistance of the temperature measuring probe can finally be restored to the initial value, which is the resistance of the temperature measuring probe when it is used for the first time under the same environment. After the thermocouple resistance is restored to the initial value, the temperature measurement accuracy of the temperature measuring probe is also restored to the initial level. It should be noted that the steam permeability in the heating chamber is not high enough when it has not reached the saturation state and is close to the saturation state. Only a very small amount of steam can penetrate the metal shell. After these steam enter the metal shell, they not only cannot generate enough impact force to dissolve and impact the stains, but also have little effect on the resistance of the temperature measuring probe. Although the stains inside the metal shell cannot be discharged after being separated from the metal shell, these stains do not have a significant effect on the resistance of the thermocouple. It takes a long time for the stains to reach a level that has a significant impact on the resistance determination of the thermocouple. When this level is reached, the entire steam oven has basically reached its scrap age.

[0012] Preferably, in step S1, before entering step S1, an air pressure sensor is first set in the heating chamber of the steam oven, and the air pressure range and measurement time are determined; in step S1, after the measurement value of the air pressure sensor is maintained within the air pressure range for longer than the measurement time, it indicates that the heating chamber has reached a steam saturation state, and then entering step S2.

[0013] Preferably, in step S2, after the steam in the heating chamber reaches a saturated state, the time for continuing to input steam into the heating chamber is between 25 and 35 minutes. The time of 25 to 35 minutes can ensure that the steam has penetrated the metal shell of the temperature measuring probe to dissolve and wash away the stains on the inner wall of the metal shell, and also has enough time to affect the thermocouple resistance of the sensor probe.

[0014] Preferably, the steps S1 to S3 are performed once each time the cumulative cooking time of the steam oven reaches a use cycle. Steps S1 to S3 are performed once each time a use cycle is reached, so that the stains on the inner wall of the metal shell of the temperature measuring probe are regularly cleaned and the resistance value of the thermocouple is adjusted, so as to regularly adjust the temperature measurement accuracy of the temperature measuring probe and ensure the cooking effect of the steam oven.

[0015] Preferably, the use cycle is between 80 and 100 minutes. After 80 to 100 minutes, the temperature measurement accuracy of the temperature measuring probe will be attenuated to a certain extent. After the steam oven is used for 80 to 100 minutes, the inner wall of the metal shell of the temperature measuring probe is cleaned and the resistance value of the thermocouple is adjusted, so as to ensure that the cooking program of the steam oven can be accurately executed according to the predetermined temperature each time it is used.

[0016] Preferably, the accumulated cooking time of the steam oven is reset when the step S1 is executed, and the cooking time of the steam oven is recalculated after the step S3 is executed.

[0017] Preferably, before entering the step S1, first confirm whether there is food in the heating chamber of the steam oven. If there is food, take the food out of the heating chamber first, otherwise enter the step S1. If there is food in the heating chamber, the food itself will absorb more steam and heat, resulting in the steam in the heating chamber not reaching a saturated state within a certain period of time, but requiring a longer steam input time to reach it. Generally, the process of steaming food cannot make the heating chamber reach a steam saturated state. Moreover, due to the presence of food, the actual temperature in the heating chamber will also have a certain deviation from 99±2℃, so when there is food in the heating chamber, the thermocouple resistance of the temperature measuring probe is difficult to accurately restore to the initial value. Executing steps S1 to S3 in the absence of food can more accurately anchor and calibrate the resistance of the temperature measuring probe, thereby improving the recovery effect of the temperature measuring accuracy of the temperature measuring probe.

[0018] The present invention also provides a steam oven, comprising a box, a temperature probe, a steam generator, a control module and a timing module; a heating chamber is provided in the box and a reset start button is provided on the box, the temperature probe is located in the heating chamber; the outlet end of the steam generator is connected to the heating chamber; the thermocouple of the temperature probe, the steam generator, the timing module and the reset start button are all electrically connected to the control module. The temperature probe refers to a temperature probe of a thermocouple temperature sensor in the prior art, which includes a metal shell and a thermocouple located inside the metal shell.

[0019] In the above technical solution, the timing module is used to calculate the cooking time of the heating component and the steam generator; after the cumulative cooking time of the timing module reaches 80 to 100 minutes, the user can press the reset start button to execute the above steps S1 to S3, or do not press the reset start button to continue the cooking process; if the reset start button is pressed, the control module can receive the signal and then control the steam generator to deliver steam to the heating chamber, and the steam that reaches the saturated state penetrates the metal shell of the temperature probe to clean the stains on the inner wall of the metal shell. At the same time, the steam in the metal shell has a certain effect on the resistance of the thermocouple until the resistance of the thermocouple reaches the initial value, that is, the temperature measurement result of the temperature probe is 99±2℃; then the control module controls the steam generator to stop delivering steam, and the timing module restarts to calculate the cooking time. The specific principle of the above technical solution has been explained above, so it will not be repeated.

[0020] Preferably, a prompt module and a stop prompt button are provided on the box body, the prompt module is electrically connected to the control module, and the stop prompt button is electrically connected to the prompt module. The timing module sends a signal to the control module after the cumulative cooking time reaches 80 to 100 minutes. The control module first sends a signal to the prompt module to make the prompt module issue a prompt. The prompt method can be a sound prompt or a flashing light prompt. After seeing the prompt, the user can press the stop prompt button to stop the prompt, and then manually press the reset start button to execute the aforementioned steps S1 to S3, or do not press the reset start button to continue the cooking process. Setting a prompt module can remind the user that the cumulative cooking time has reached 80 to 100 minutes. So that the user can adjust the temperature measurement accuracy of the temperature measuring probe in time.

[0021] Preferably, an air pressure sensor is provided in the heating chamber, and the air pressure sensor is used to measure the air pressure in the heating chamber, so as to judge whether the heating chamber has reached a steam saturation state.

[0022] The beneficial effects of the present invention are as follows: the saturated steam penetrates the metal shell of the temperature measuring probe to dissolve and remove the stains, so that the stains are separated from the inner wall of the metal shell, and the influence of the stains on the heat transfer effect of the metal shell can be eliminated; at the same time, the steam inside the metal shell can affect the resistance of the thermocouple of the temperature measuring probe. Combining the above two processes can restore the resistance of the thermocouple of the temperature measuring probe to the initial value, thereby restoring the temperature measurement accuracy of the temperature measuring probe to the initial level, making the performance of the steam oven as good as new, maintaining accurate temperature control, and improving the cooking effect of the steam oven and user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the front structure of a steam oven;

[0024] Figure 2 It is a schematic diagram of the back structure of a steam oven.

[0025] In the attached drawings: 1-box; 101-heating chamber; 2-temperature measuring probe; 3-steam generator; 4-control module; 5-control panel. DETAILED DESCRIPTION

[0026] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0029] Example 1

[0030] This embodiment is a first embodiment of a temperature measurement accuracy recovery method, which includes the following steps:

[0031] S1: The steam generator of the steam oven inputs steam into the heating chamber of the steam oven, so that the heating chamber reaches a steam saturated state. In this state, the steam pressure in the heating chamber of the steam oven is basically stable; proceed to step S2.

[0032] S2: Determine whether the temperature measured by the temperature probe is within 99±2℃. If so, it means that the thermocouple resistance of the temperature probe has returned to the initial value. At this time, stop inputting steam and enter step S3; otherwise, it means that the thermocouple resistance of the temperature probe has not returned to the initial value, and continue to deliver steam. When the steam oven leaves the factory, the temperature measurement result of the temperature probe is generally within the range of ±2℃ of the actual temperature. After the steam oven has been used for a period of time, the temperature measurement result of the temperature probe will deviate from the range of ±2℃ of the actual temperature. When the steam in the heating chamber of the steam oven reaches a saturated state, the steam temperature is around 99℃. Therefore, when the temperature measured by the temperature probe is within the range of 99±2℃, it means that the thermocouple resistance of the temperature probe has returned to the initial value, and the temperature measurement accuracy of the temperature probe has returned to the initial level.

[0033] S3: End.

[0034] The working principle or workflow of this embodiment: When the steam reaches the steam saturation state in the heating chamber, it has a strong penetration characteristic and can penetrate the metal shell of the temperature measuring probe. The steam entering the metal shell can shock the stains on the inner wall of the metal shell, so that the stains are separated from the inner wall of the metal shell, thereby eliminating the influence of these stains on the heat transfer effect of the metal shell. In addition, the steam entering the metal shell will affect the resistance of the thermocouple of the temperature measuring probe. Combining the above two processes, the thermocouple resistance of the temperature measuring probe can finally be restored to the initial value, which is the resistance of the temperature measuring probe when it is used for the first time under the same environment. After the thermocouple resistance is restored to the initial value, the temperature measurement accuracy of the temperature measuring probe is also restored to the initial level. It should be noted that the steam penetration of the steam in the heating chamber is not high enough when it has not reached the saturation state and is close to the saturation state. Only a very small amount of steam can penetrate the metal shell. After these steam enter the metal shell, they not only cannot generate enough impact force to dissolve and impact the stains, but also have little effect on the resistance of the temperature measuring probe. Although the stains inside the metal shell cannot be discharged after being separated from the metal shell, these stains do not have a significant effect on the resistance of the thermocouple. It takes a long time for the stains to reach a level that has a significant impact on the resistance determination of the thermocouple. When this level is reached, the entire steam oven has basically reached its scrap age.

[0035] The beneficial effects of this embodiment are as follows: the saturated steam penetrates the metal shell of the temperature measuring probe to dissolve and remove the stains, so that the stains are separated from the inner wall of the metal shell, and the influence of the stains on the heat transfer effect of the metal shell can be eliminated; at the same time, the steam inside the metal shell can affect the resistance of the thermocouple of the temperature measuring probe. Combining the above two processes can restore the resistance of the thermocouple of the temperature measuring probe to the initial value, thereby restoring the temperature measurement accuracy of the temperature measuring probe to the initial level, making the temperature control performance of the steam oven as good as new, maintaining accurate temperature control, and improving the cooking effect of the steam oven and user satisfaction.

[0036] Example 2

[0037] This embodiment is a second embodiment of a method for restoring temperature measurement accuracy. This embodiment further illustrates step S1 to step S3 based on embodiment 1.

[0038] Furthermore, before entering step S1, an air pressure sensor is first set in the heating chamber of the steam oven, and the air pressure range and measurement time are determined; in step S1, after the measurement value of the air pressure sensor is maintained within the air pressure range for longer than the measurement time, it indicates that the heating chamber has reached a steam saturation state, and then enter step S2.

[0039] Furthermore, in step S2, after the steam in the heating chamber reaches a saturated state, the steam is continuously input into the heating chamber for 20 minutes. The 20 minutes ensure that the steam has penetrated the metal shell of the temperature measuring probe to dissolve and wash away the stains on the inner wall of the metal shell, and also has enough time to affect the thermocouple resistance of the sensor probe.

[0040] Further, after the cumulative cooking time of the steam oven reaches a usage cycle, steps S1 to S3 are performed once. Steps S1 to S3 are performed after each usage cycle, so as to regularly clean the stains on the inner wall of the metal shell of the temperature measuring probe and adjust the resistance value of the thermocouple, so as to regularly adjust the temperature measurement accuracy of the temperature measuring probe to ensure the cooking effect of the steam oven.

[0041] Furthermore, the above-mentioned use cycle is 90 minutes. After 90 minutes, the temperature measurement accuracy of the temperature measuring probe will be attenuated to a certain extent. After the steam oven is used for 90 minutes, the inner wall of the metal shell of the temperature measuring probe is cleaned and the resistance value of the thermocouple is adjusted, so as to ensure that the cooking program of the steam oven can be accurately executed according to the predetermined temperature every time it is used.

[0042] Furthermore, when executing step S1, the accumulated cooking time of the steam oven is reset to zero, and after executing step S3, the cooking time of the steam oven is recalculated.

[0043] Furthermore, before entering step S1, first confirm whether there is food in the heating chamber of the steam oven. If there is food, take the food out of the heating chamber first, otherwise enter step S1. If there is food in the heating chamber, the food itself will absorb more steam and heat, resulting in the steam in the heating chamber not reaching a saturated state within a certain period of time, but requiring a longer steam input time to reach it. Generally, the process of steaming food cannot make the heating chamber reach a steam saturated state. Moreover, due to the presence of food, the actual temperature in the heating chamber will also have a certain deviation from 99±2℃, so when there is food in the heating chamber, the thermocouple resistance of the temperature measuring probe is difficult to accurately restore to the initial value. Executing steps S1 to S3 in the absence of food can more accurately anchor and calibrate the resistance of the temperature measuring probe, thereby improving the recovery effect of the temperature measuring accuracy of the temperature measuring probe.

[0044] Other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 1.

[0045] Example 3

[0046] This embodiment is a first embodiment of a steam oven, which is used to execute the temperature measurement accuracy recovery method of embodiment 2, combined with Figure 1 and Figure 2 As shown, it includes a box body 1, a temperature probe 2, a steam generator 3, a control module 4, a control panel 5 and a timing module (not shown in the figure); a heating chamber 101 is provided in the box body 1, and the temperature probe 2 is located in the heating chamber 101; the control panel 5 is arranged on the top of the box body 1, and a reset start button (not shown in the figure) is provided on the control panel 5; the outlet end of the steam generator 3 is connected to the heating chamber 101; the thermocouple of the temperature probe 2, the steam generator 3, the control panel 5, the timing module and the reset start button are all electrically connected to the control module 4. Among them, the temperature probe 2 refers to the temperature probe of the thermocouple temperature sensor in the prior art, which includes a metal shell and a thermocouple located inside the metal shell.

[0047] Furthermore, a prompt module (not shown in the figure) and a stop prompt button (not shown in the figure) are provided on the box body 1, the prompt module is electrically connected to the control module 4, and the stop prompt button is electrically connected to the prompt module. Specifically, the prompt module and the stop prompt button are both provided on the control panel 5, and the prompt module is a flashing light.

[0048] The working principle or workflow of this embodiment is as follows: the timing module sends a signal to the control module 4 after the cumulative cooking time reaches 90 minutes, and the control module 4 first sends a signal to the prompt module to make the prompt module emit a flashing light prompt; after seeing the prompt, the user can press the stop prompt button to stop the prompt, and then manually press the reset start button to execute the aforementioned steps S1 to S3, or do not press the reset start button to continue the cooking process. If the reset start button is pressed, the control module 4 can receive the signal and then control the steam generator 3 to deliver steam to the heating chamber 101. The steam that reaches the saturated state penetrates the metal shell of the temperature probe 2 to clean the stains on the inner wall of the metal shell. At the same time, the steam in the metal shell has a certain effect on the resistance of the thermocouple until the resistance of the thermocouple reaches the initial value, that is, the temperature measurement result of the temperature probe 2 is 99±2℃; then the control module 4 controls the steam generator 3 to stop delivering steam, and the timing module restarts to calculate the cooking time, so that the accuracy of the temperature probe 2 is restored.

[0049] Furthermore, a pressure sensor (not shown) is provided in the heating chamber 101. The pressure sensor is used to measure the pressure in the heating chamber 101, so as to judge whether the heating chamber 101 has reached a steam saturation state.

[0050] The other features, working principles and beneficial effects of this embodiment are consistent with those of Embodiment 2.

[0051] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description, and it is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for restoring temperature measurement accuracy, characterized in that: The following steps are involved: S1: The steam generator of the steam oven inputs steam into the heating chamber of the steam oven so that the heating chamber reaches a steam saturated state; then proceed to step S2; S2: Determine whether the temperature measured by the temperature measuring probe is 99±2°C. If so, stop inputting steam and proceed to step S3; otherwise, continue to deliver steam; S3: End.

2. A temperature measurement accuracy recovery method according to claim 1, characterized in that: Before entering the step S1, an air pressure sensor is first set in the heating chamber of the steam oven, and the air pressure range and measurement time are determined; in the step S1, after the time for which the measured value of the air pressure sensor is maintained within the air pressure range exceeds the measurement time, the step S2 is entered.

3. A temperature measurement accuracy recovery method according to claim 1, characterized in that: In step S2, after the steam in the heating chamber reaches a saturated state, the time for continuing to input steam into the heating chamber is between 25 and 35 minutes.

4. A temperature measurement accuracy recovery method according to claim 1, characterized in that: Each time the accumulated cooking time of the steam oven reaches a usage cycle, step S1 to step S3 are performed once.

5. A temperature measurement accuracy recovery method according to claim 4, characterized in that: The use period is between 80 and 100 minutes.

6. A temperature measurement accuracy recovery method according to claim 4, characterized in that: When executing step S1, the accumulated cooking time of the steam oven is also reset, and after executing step S3, the cooking time of the steam oven is recalculated.

7. A temperature measurement accuracy recovery method according to claim 1, characterized in that: Before entering the step S1, first confirm whether there is food in the heating chamber of the steam oven. If there is food, first take the food out of the heating chamber, otherwise enter the step S1.

8. A steam oven, used to perform the temperature measurement accuracy recovery method according to any one of claims 1 to 7, characterized in that: The invention comprises a box (1), a temperature measuring probe (2), a steam generator (3), a control module (4) and a timing module; a heating chamber (101) is provided in the box (1) and a reset start button is provided on the box (1); the temperature measuring probe (2) is located in the heating chamber (101); the outlet end of the steam generator (3) is connected to the heating chamber (101); the thermocouple of the temperature measuring probe (2), the steam generator (3), the timing module and the reset start button are all electrically connected to the control module (4).

9. The steam oven according to claim 8, characterized in that: The box body (1) is provided with a prompt module and a stop prompt button, the prompt module is electrically connected to the control module (4), and the stop prompt button is electrically connected to the prompt module.

10. The steam oven according to claim 9, characterized in that: An air pressure sensor is provided in the heating chamber (101).