A steam treatment method of a steam oven

Abstract

The present application relates to a kind of steam treatment methods of steam baking cooking machine, the steam baking cooking machine includes the cooking box with cooking cavity, steam generator is communicated with cooking cavity, the cooking box is opened with exhaust port, the exhaust port is equipped with adjustable opening degree's flow control valve;Steam baking cooking machine works, according to menu parameter, the working parameter in cooking cavity, steam generator working parameter controls the opening degree of flow control valve, and then the steam amount in cooking cavity is adjusted.This steam treatment method of steam baking cooking machine guarantees the steam in cooking cavity sufficient under the premise of steam not top door, and then reduces working time and cooking effect.

Description

Technical Field

[0001] This invention relates to a steam treatment method for a steam oven. Background Technology

[0002] A steam oven is a common kitchen appliance that contains a steam generator that produces a large amount of steam during use. Existing technologies typically control the steam generator based on the temperature inside the cooking cavity. For example, Chinese invention patent application CN115444271A (application number 202211348085.3), entitled "Control Method, Cooking Appliance, and Storage Medium," discloses a control method that involves: controlling the steam generator to generate steam to heat the food inside the cooking cavity; controlling the steam generator to shut off and the hot air assembly to generate hot air inside the cooking cavity to achieve a second preset temperature; controlling the hot air assembly to generate hot air inside the cooking cavity to achieve a third preset temperature, which is higher than the first and second preset temperatures; and shutting off the hot air assembly after the third heating operation. However, existing technologies do not address how to control the amount of steam inside the cooking cavity to improve the steam oven's performance, a problem that remains to be solved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a steam treatment method for a steam oven that ensures sufficient steam in the cooking cavity without the steam blocking the door, thereby reducing working time and improving cooking effect.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a steam treatment method for a steam oven, characterized in that: the steam oven includes a cooking chamber with a cooking cavity and a steam generator connected to the cooking cavity, the cooking chamber is provided with an exhaust port, and the exhaust port is provided with a flow control valve with an adjustable opening.

[0005] When the steam oven is working, it controls the opening of the flow control valve according to the menu parameters, the working parameters inside the cooking cavity, and the working parameters of the steam generator, thereby adjusting the amount of steam inside the cooking cavity.

[0006] As an improvement, the working process of the steam oven includes a preheating stage, which ends when the temperature inside the cooking cavity reaches the set temperature threshold.

[0007] During the preheating stage, the opening degree of the flow control valve is controlled according to the menu settings (temperature T1), the pressure difference data Y in the cooking chamber, the actual temperature T2 in the cooking chamber, and the power P of the steam generator.

[0008] As an improvement, temperature thresholds B1 and B2 are set, where B1 < B2;

[0009] In the preheating stage, when T1 ≤ B1, the opening degree of the flow control valve is controlled according to the differential pressure data Y in the cooking cavity; when B1 < T1 < B2 or T1 ≥ B2, the opening degree of the flow control valve is controlled according to the actual temperature T2 in the cooking cavity and the power P of the steam generator.

[0010] As an improvement, differential pressure thresholds m1 and m2 are set, where m1 < m2; temperature thresholds C1, C2, and C3 are set, where C2 < C1 < C3, and B1 < B2, B1 > C1, B2 > C1, B2 > C2, B2 > C3; power thresholds D1 and D2 of the evaporation generator are set, where D1 < D2;

[0011] In the preheating stage, when T1 ≤ B1, if Y ≤ m1, the flow control valve is controlled to remain closed; if m1 < Y < m2, the opening degree of the current flow control valve remains unchanged; if Y ≥ m2, the flow control valve is controlled to open with an opening degree of A1;

[0012] When B1 < T1 < B2, if T2 ≤ C1, the flow control valve is controlled to remain closed; if T2 > C1 and P ≤ D1, the flow control valve is controlled to open with an opening degree of A1; if T2 > C1 and P > D1, the flow control valve is controlled to open with an opening degree of A2;

[0013] When T1 ≥ B2, if T2 ≤ C2, the flow control valve is controlled to remain closed; if C3 > T2 > C2 and P ≤ D1, the flow control valve is controlled to open with an opening degree of A2; if T2 ≥ C3, the flow control valve is controlled to open with an opening degree of A3, and at the same time, if P ≥ D2, the power of the steam generator is controlled to be adjusted to D1;

[0014] Where A1 < A2 < A3.

[0015] As an improvement, the working process of the steam baking and roasting machine includes a countdown stage after the preheating stage;

[0016] In the countdown stage, according to the menu-set temperature T1, the differential pressure data Y in the cooking cavity, and the power P of the steam generator, the opening degree of the flow control valve and the working time t of the steam generator are controlled.

[0017] As an improvement, temperature thresholds B1 and B2 are set, where B1 < B2; differential pressure thresholds m1 and m2 are set, where m1 < m2;

[0018] In the countdown stage, when T1 ≤ B1, the opening degree of the flow control valve is controlled according to the differential pressure data Y in the cooking cavity; when B1 < T1 < B2 or T1 ≥ B2, the opening degree of the flow control valve and the working time t of the steam generator are controlled according to the differential pressure data Y and the power P of the steam generator in the cooking cavity.

[0019] As an improvement, differential pressure thresholds m1 and m2 are set, where m1 < m2; power thresholds D1 and D2 are set for the evaporator, where D1 < D2; the steam generator operates intermittently according to a set cycle.

[0020] When T1≤B1, if Y≤m1, the flow control valve is closed; if m1<Y<m2, the current opening of the flow control valve remains unchanged; if Y≥m2, the flow control valve is opened and the opening is A1.

[0021] When B1 < T1 < B2, if Y ≤ m1, the flow control valve is closed; if m1 < Y ​​< m2, the current opening of the flow control valve remains unchanged; if Y ≥ m2 and P ≤ D1, the flow control valve is opened to an opening of A1, and the flow control valve is opened synchronously with the steam generator for a first duration E1 longer than the opening time of the steam generator; if Y ≥ m2 and P > D1, the flow control valve is opened to an opening of A2, and the flow control valve is opened synchronously with the steam generator for a second duration E2 longer than the opening time of the steam generator.

[0022] When T1≥B2, if Y≤m1, the flow control valve is closed; if m1<Y<m2 and P≤D1, the flow control valve is opened to an opening degree of A1, and the flow control valve is opened synchronously with the steam generator for a first duration E1 longer than the opening time of the steam generator; if m1<Y<m2 and P>D1, the flow control valve is opened to an opening degree of A2, and the flow control valve is opened synchronously with the steam generator for a second duration E2 longer than the opening time of the steam generator; if Y≥m2, the flow control valve is opened to an opening degree of A3, and the flow control valve is opened synchronously with the steam generator for a third duration E3 longer than the opening time of the steam generator.

[0023] Where A1 < A2 < A3, E1 < E2 < E3.

[0024] As an improvement, when the steam oven is working, if it enters a pause state, it controls the opening of the flow control valve according to the temperature T1 set in the menu, the pressure difference data Y in the cooking chamber, and the power P of the steam generator.

[0025] As an improvement, temperature thresholds B1 and B2 are set, where B1 < B2; pressure difference thresholds m1 and m2 are set, where m1 < m2; and power thresholds D1 and D2 of the evaporator are set, where D1 < D2.

[0026] When the steam oven is paused, if the pressure difference Y ≤ m1, the flow control valve is closed; if m1 < Y ​​< m2, the current opening of the flow control valve remains unchanged.

[0027] When Y > m2:

[0028] When T1≤B1, the flow control valve is opened and the opening degree is A1.

[0029] When B1 < T1 < B2, if P ≤ D1, the flow control valve is opened and the opening degree is A1; if P > D1, the flow control valve is opened and the opening degree is A2.

[0030] When T1≥B2, if P≤D2, the flow control valve is opened and the opening degree is A2; if P>D2, the flow control valve is opened and the opening degree is A3.

[0031] Where A1 < A2 < A3.

[0032] Compared with existing technologies, the advantages of this invention are as follows: The steam treatment method of the steam oven in this invention can control the opening of the flow control valve according to the menu parameters, the working parameters inside the cooking cavity, and the working parameters of the steam generator during the operation of the steam oven, thereby adjusting the amount of steam in the cooking cavity. By adjusting the amount of steam, sufficient steam can be ensured in the cooking cavity without blocking the door, especially during the preheating stage, which can reduce the preheating time. Throughout the entire cooking process, the amount of steam in the cooking cavity can be adjusted to minimize the amount of steam emitted while maintaining the temperature inside the cooking cavity, thus improving the cooking effect of the steaming function and shortening the cooking time to some extent. Attached Figure Description

[0033] Figure 1 This is a perspective view of the steam oven cooking machine in an embodiment of the present invention. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0035] The dehumidification method of the steam oven in this embodiment can be applied to steam ovens, and of course, it can also be applied to steam ovens with similar functions. Figure 1 As shown, the steam oven includes a cooking chamber 1 with a cooking cavity and a steam generator connected to the cooking cavity. The cooking chamber 1 has an exhaust port 11, and the exhaust port 11 is equipped with an adjustable flow control valve 2. The steam generator can be any type of steam generator used in steam ovens, such as a heating plate or an instantaneous steam generator. During use, the flow control valve 2 adjusts the amount of steam released from the cooking cavity by regulating its opening.

[0036] The steam treatment method in this embodiment is as follows.

[0037] When the steam cooking machine is working, the opening degree of the flow control valve 2 is controlled according to the menu parameters, the working parameters in the cooking cavity, and the working parameters of the steam generator, so as to adjust the amount of steam in the cooking cavity. Generally, the working process of the steam cooking machine includes a preheating stage in the early stage. In the preheating stage, the temperature in the cooking cavity is on the rising stage. Usually, a tested temperature curve is set to control the operation of the steam generator, and then the steam is transported into the cooking cavity. The temperature in the cooking cavity rises accordingly. During the temperature rise, the amount of steam increases. When the temperature in the cooking cavity reaches the set temperature threshold, the preheating stage ends. Then it enters the countdown stage. In the countdown stage, its temperature control curve is specifically set according to needs.

[0038] In this embodiment, in the preheating stage, the opening degree of the flow control valve 2 is controlled according to the temperature T1 set in the menu, the pressure difference data Y in the cooking cavity, the actual temperature T2 in the cooking cavity, and the power P of the steam generator.

[0039] Specifically, temperature thresholds B1 and B2 are set, where B1 < B2. Pressure difference thresholds m1 and m2 are set, m1 < m2. Temperature thresholds C1, C2, and C3 are set, where C2 < C1 < C3, and B1 < B2, B1 > C1, B2 > C1, B2 > C2, B2 > C3. Power thresholds D1 and D2 of the evaporation generator are set, D1 < D2.

[0040] In the preheating stage, when T1 ≤ B1, the amount of steam in the corresponding cooking cavity is relatively small, and the opening degree of the flow control valve 2 is controlled according to the pressure difference data Y in the cooking cavity. This pressure difference data can be detected and obtained by a pressure difference sensor set in the cooking cavity. The pressure difference data reflects the pressure difference in the cooking cavity relative to the outside air. If Y ≤ m1, it means that the air pressure in the cooking cavity is small. At this time, the amount of steam in the cooking cavity is small. So, the flow control valve 2 is controlled to remain closed to avoid the outward discharge of steam, so that the temperature in the cooking cavity can rise quickly and the preheating time can be reduced. If m1 < Y < m2, the opening degree of the current flow control valve 2 remains unchanged, indicating that the air pressure in the cooking cavity is moderate. At this time, only the current state of the flow control valve 2 needs to be maintained. For example, if the opening degree of the current flow control valve 2 is 0, it remains in the closed state to continue accumulating steam. If the current opening degree of the flow control valve 2 is A1, it also maintains this opening degree to control the steam to be discharged at the original speed, so that the steam state in the cooking cavity will not be affected. If Y ≥ m2, it means that the steam pressure in the cooking cavity is large. In order to avoid the situation of steam overflow due to door jamming, the flow control valve 2 is controlled to open with an opening degree of A1. A1 is a relatively small opening degree to avoid the rapid outward discharge of steam in the cooking cavity. In this way, it can ensure that the steam in the cooking cavity is sufficient without door jamming, thereby reducing the preheating time and also ensuring the steaming function effect.

[0041] During the preheating stage, when B1 < T1 < B2 and T1 ≥ B2, the opening degree of the flow control valve 2 is controlled according to the actual temperature T2 inside the cooking cavity and the power P of the steam generator.

[0042] Specifically, when B1 < T1 < B2, if T2 ≤ C1, it means the temperature inside the cooking chamber cannot reach the set temperature. In this case, the flow control valve 2 is kept closed to increase the amount of steam entering the cooking chamber, thereby quickly raising the temperature inside the chamber and ensuring the cooking effect. If T2 > C1 and P ≤ D1, it means the temperature inside the cooking chamber is slightly lower than or exceeds the set temperature, and the heating power of the steam generator is also relatively low. In this case, the flow control valve 2 is opened to an opening degree of A1. A1 is small, controlling the steam to escape with a small amount of steam, thus preventing steam from hitting the valve and maintaining the temperature inside the cooking chamber near the set temperature, ensuring the cooking effect. If T2 > C1 and P > D1, it means the heating power of the steam generator is relatively high, i.e., the steam production is relatively large. In this case, the opening degree of the flow control valve 2 needs to be increased, thus opening the flow control valve 2 to an opening degree of A2.

[0043] When T1 ≥ B2, it indicates that the temperature inside the cooking cavity needs to be controlled at a higher level. If T2 ≤ C2, it indicates that the temperature inside the cooking cavity is too low. In this case, it is necessary to prevent steam from escaping to quickly raise the temperature inside the cooking cavity. Therefore, the flow control valve 2 is kept closed. If C3 > T2 > C2, it indicates that the temperature inside the cooking cavity has risen and is close to the set temperature. In this case, if P ≤ D1, the flow control valve 2 is opened to an opening of A2, which means that steam is vented at a moderate rate to avoid steam overflow and ensure a stable temperature inside the cooking cavity. If T2 ≥ C3, it indicates that the temperature inside the cooking cavity is high and close to or exceeds the set temperature, meaning that the amount of steam inside the cooking cavity is also relatively large. In this case, the opening of the flow control valve 2 needs to be increased to increase the amount of steam venting and avoid steam overflow. The flow control valve 2 is opened to an opening of A3. At the same time, if P ≥ D2, the power of the steam generator is adjusted to D1, which means reducing the power of the steam generator and reducing the amount of steam produced. The aforementioned A1 < A2 < A3.

[0044] During the countdown phase, the temperature inside the cooking cavity is usually relatively stable and the amount of steam is relatively large. At this time, the opening degree of the flow control valve 2 and the working time t of the steam generator are controlled according to the menu settings, temperature T1, pressure difference data Y inside the cooking cavity, power P of the steam generator.

[0045] Specifically, temperature thresholds B1 and B2 are set, where B1 < B2; differential pressure thresholds m1 and m2 are set, where m1 < m2; power thresholds D1 and D2 of the evaporator are set, where D1 < D2; the steam generator operates intermittently according to a set cycle. For example, if the set cycle is one minute, the steam generator can be controlled to work for 40 seconds and stop working for 20 seconds within one minute, ensuring the safe operation of the steam generator and preventing the temperature inside the cooking cavity from exceeding the standard.

[0046] During the countdown phase, when T1≤B1, the opening of the flow control valve 2 is controlled according to the pressure difference data Y in the cooking cavity; when B1<T1<B2 and T1≥B2, the opening of the flow control valve 2 and the working time t of the steam generator are controlled according to the pressure difference data Y in the cooking cavity and the power P of the steam generator.

[0047] Specifically, when T1≤B1, it indicates that the amount of steam in the cooking cavity is relatively small. If Y≤m1, it indicates that the amount of steam in the cooking cavity is small and the air pressure is low. In this case, in order to maintain a stable temperature in the cooking cavity, it is necessary to keep the flow control valve 2 closed to prevent steam from escaping and maintain the temperature in the cooking cavity. If m1<Y<m2, the opening of the flow control valve 2 remains unchanged. If Y≥m2, it indicates that the amount of steam in the cooking cavity is already large for the lower temperature requirement. In this case, the flow control valve 2 is opened to an opening of A1, that is, the steam is controlled to be discharged at a relatively appropriate flow rate. Combined with the steam generator's steam input into the cooking cavity, the temperature in the cooking cavity can be maintained stably, and the door will not be blocked.

[0048] When B1 < T1 < B2, the target temperature inside the cooking cavity is relatively moderate. If Y ≤ m1, the flow control valve 2 is kept closed to prevent steam from escaping and causing a temperature drop. If m1 < Y ​​< m2, the opening of the flow control valve 2 remains unchanged. If Y ≥ m2 and P ≤ D1, the amount of steam inside the cooking cavity is relatively sufficient, but the steam output of the steam generator is relatively small. In this case, the flow control valve 2 is opened to an opening of A1, meaning that only a small flow of steam is discharged from the steam generator casing to ensure a stable temperature and sufficient amount of steam inside the cooking cavity. At the same time, the flow control valve 2 is opened synchronously with the steam generator, and the opening time is extended by a first duration E1 compared to the opening time of the steam generator. That is, compared to the steam input time, the steam discharge time is extended for a short period to ensure sufficient steam in the cooking cavity and prevent it from blocking the door. If Y≥m2 and P>D1, control the flow control valve 2 to open with an opening degree of A2, and simultaneously control the flow control valve 2 to open synchronously with the steam generator and extend the opening time of the steam generator by a second duration E2.

[0049] When T1 ≥ B2, it indicates that the set temperature inside the cooking cavity is relatively high, thus requiring a higher steam volume to maintain temperature stability. If Y ≤ m1, the flow control valve 2 is kept closed to prevent steam from escaping and ensure the required high temperature. If m1 < Y ​​< m2 and P ≤ D1, it indicates that the steam volume inside the cooking cavity is moderate, but the steam generation is relatively small. The flow control valve 2 is opened to an opening degree of A1, and simultaneously, the flow control valve 2 is opened synchronously with the steam generator, with the opening time extended by a first duration E1 compared to the steam generator. This ensures that the steam escaping from the cooking cavity is slightly less than the steam input, guaranteeing sufficient steam and temperature inside the cooking cavity. If m1 < Y ​​< m2 and P > D1, it indicates that the amount of steam in the cooking cavity is moderate and the steam generator supplies a large amount of steam to the cooking cavity. In this case, it is necessary to increase the opening of the flow control valve 2 to increase the steam discharge and avoid steam overflow. Therefore, the flow control valve 2 is opened to an opening degree of A2, and simultaneously, the flow control valve 2 is opened synchronously with the steam generator, with the opening time extended by a second duration E2 compared to the steam generator. If Y ≥ m2, the flow control valve 2 is opened to an opening degree of A3, and simultaneously, the flow control valve 2 is opened synchronously with the steam generator, with the opening time extended by a third duration E3 compared to the steam generator. This increases the steam discharge while ensuring steam input, preventing a decrease in steam volume. Where A1 < A2 < A3, E1 < E2 < E3.

[0050] Additionally, users may pause the steam oven during operation. If the steam oven is paused, the opening of the flow control valve 2 will be adjusted based on the menu settings (temperature T1, pressure difference Y within the cooking chamber, and steam generator power P). When the steam oven is paused, the steam volume should be adjusted as much as possible to ensure that the cooking chamber reaches the required parameters more quickly upon restarting.

[0051] Specifically, set temperature thresholds B1 and B2, where B1 < B2; set pressure difference thresholds m1 and m2, where m1 < m2; and set power thresholds D1 and D2 for the evaporator, where D1 < D2.

[0052] When the steam oven is paused, if the pressure difference Y ≤ m1, it indicates that the amount of steam in the cooking chamber is very small. In this case, the flow control valve 2 is closed to maintain the steam volume as much as possible and prevent further steam leakage. If m1 < Y ​​< m2, the opening degree of the flow control valve 2 remains unchanged. When Y > m2, if T1 ≤ B1, the flow control valve 2 is opened to an opening degree of A1. When B1 < T1 < B2, if P ≤ D1, the flow control valve 2 is opened to an opening degree of A1; if P > D1, the flow control valve 2 is opened to an opening degree of A2. When T1 ≥ B2, if P ≤ D2, the flow control valve 2 is opened to an opening degree of A2; if P > D2, the flow control valve 2 is opened to an opening degree of A3. Where A1 < A2 < A3.

[0053] The steam treatment method of the steam oven in this invention controls the opening of the flow control valve 2 according to menu parameters, working parameters within the cooking cavity, and working parameters of the steam generator during operation. This adjusts the amount of steam within the cooking cavity, ensuring sufficient steam without blocking the door, especially reducing preheating time. Throughout the cooking process, the steam volume within the cooking cavity is regulated, minimizing steam exhaust while maintaining the internal temperature, thus improving the cooking effect of the steaming function and shortening cooking time to some extent.

Claims

1. A steam treatment method for a steam oven, characterized in that: The steam baking cooker includes a cooking box (1) with a cooking cavity and a steam generator connected to the cooking cavity. An exhaust port (11) is provided on the cooking box (1), and a flow control valve (2) with adjustable opening degree is provided on the exhaust port (11); When the steam baking cooker is working, the opening degree of the flow control valve (2) is controlled according to the menu parameters, the working parameters in the cooking cavity, and the working parameters of the steam generator, so as to adjust the amount of steam in the cooking cavity; The working process of the steam baking cooker includes a preheating stage at the beginning. When the temperature in the cooking cavity reaches the set temperature threshold, the preheating stage ends; In the preheating stage, the opening degree of the flow control valve (2) is controlled according to the set temperature T1 in the menu, the pressure difference data Y in the cooking cavity, the actual temperature T2 in the cooking cavity, and the power P of the steam generator; Set temperature thresholds B1 and B2, where B1 < B2; In the preheating stage, when T1 ≤ B1, the opening degree of the flow control valve (2) is controlled according to the pressure difference data Y in the cooking cavity; When B1 < T1 < B2 and T1 ≥ B2, the opening degree of the flow control valve (2) is controlled according to the actual temperature T2 in the cooking cavity and the power P of the steam generator; Set pressure difference thresholds m1 and m2, where m1 < m2; set temperature thresholds C1, C2, and C3, where C2 < C1 < C3, and B1 < B2, B1 > C1, B2 > C1, B2 > C2, B2 > C3; set power thresholds D1 and D2 for the evaporation generator, where D1 < D2; In the preheating stage, when T1 ≤ B1, if Y ≤ m1, then control the flow control valve (2) to remain closed; if m1 < Y < m2, then keep the opening degree of the current flow control valve (2) unchanged; if Y ≥ m2, then control the flow control valve (2) to open with an opening degree of A1; When B1 < T1 < B2, if T2 ≤ C1, then control the flow control valve (2) to remain closed. If T2 > C1 and P ≤ D1, control the flow control valve (2) to open with an opening degree of A1. If T2 > C1 and P > D1, control the flow control valve (2) to open with an opening degree of A2; When T1 ≥ B2, if T2 ≤ C2, then control the flow control valve (2) to remain closed. If C3 > T2 > C2 and P ≤ D1, control the flow control valve (2) to open with an opening degree of A2; if T2 ≥ C3, control the flow control valve (2) to open with an opening degree of A3, and at the same time, if P ≥ D2, control the power of the steam generator to be adjusted to D1; Where A1 < A2 < A3.

2. The steam treatment method of the steam oven according to claim 1, characterized in that: The working process of the steam baking cooker includes a countdown stage after the preheating stage; In the countdown stage, the opening degree of the flow control valve (2) and the working time t of the steam generator are controlled according to the set temperature T1 in the menu, the pressure difference data Y in the cooking cavity, and the power P of the steam generator; 3. The steam treatment method of the steam oven according to claim 2, characterized in that: Set temperature thresholds B1 and B2, where B1 < B2; set pressure difference thresholds m1 and m2, where m1 < m2; During the countdown phase, when T1≤B1, the opening of the flow control valve (2) is controlled according to the pressure difference data Y in the cooking cavity; when B1<T1<B2 and T1≥B2, the opening of the flow control valve (2) and the working time t of the steam generator are controlled according to the pressure difference data Y in the cooking cavity and the power P of the steam generator. Set differential pressure thresholds m1 and m2, where m1 < m2; set power thresholds D1 and D2 for the evaporator, where D1 < D2; the steam generator operates intermittently according to the set cycle. When T1≤B1, if Y≤m1, control the flow control valve (2) to be closed; if m1<Y<m2, keep the current opening of the flow control valve (2) unchanged; if Y≥m2, control the flow control valve (2) to be opened and the opening is A1. When B1 < T1 < B2, if Y ≤ m1, control the flow control valve (2) to be closed; if m1 < Y ​​< m2, keep the current opening degree of the flow control valve (2) unchanged; if Y ≥ m2 and P ≤ D1, control the flow control valve (2) to open with an opening degree of A1, and control the flow control valve (2) to open synchronously with the steam generator and extend the opening time of the steam generator by a first duration E1; if Y ≥ m2 and P > D1, control the flow control valve (2) to open with an opening degree of A2, and control the flow control valve (2) to open synchronously with the steam generator and extend the opening time of the steam generator by a second duration E2. When T1≥B2, if Y≤m1, the flow control valve (2) is closed; if m1<Y<m2 and P≤D1, the flow control valve (2) is opened with an opening degree of A1, and the flow control valve (2) is opened synchronously with the steam generator and the opening time is extended by a first duration E1 compared to the opening time of the steam generator; if m1<Y<m2 and P>D1, the flow control valve (2) is opened with an opening degree of A2, and the flow control valve (2) is opened synchronously with the steam generator and the opening time is extended by a second duration E2 compared to the opening time of the steam generator; if Y≥m2, the flow control valve (2) is opened with an opening degree of A3, and the flow control valve (2) is opened synchronously with the steam generator and the opening time is extended by a third duration E3 compared to the opening time of the steam generator. Where A1 < A2 < A3, E1 < E2 < E3.

4. The steam treatment method of the steam oven according to claim 1, characterized in that: When the steam oven is working, if it enters the pause state, the opening degree of the flow control valve (2) is controlled according to the menu settings: temperature T1, pressure difference data Y in the cooking chamber, and power P of the steam generator. Set temperature thresholds B1 and B2, where B1 < B2; set pressure difference thresholds m1 and m2, where m1 < m2; set power thresholds D1 and D2 for the evaporator, where D1 < D2. When the steam oven is paused, if the pressure difference Y≤m1, the flow control valve (2) is closed; if m1<Y<m2, the opening of the flow control valve (2) remains unchanged. When Y > m2: When T1≤B1, the flow control valve (2) is opened and the opening degree is A1; When B1 < T1 < B2, if P ≤ D1, control the flow control valve (2) to open and the opening degree is A1; if P > D1, control the flow control valve (2) to open and the opening degree is A2. When T1≥B2, if P≤D2, control the flow control valve (2) to open and the opening degree is A2; if P>D2, control the flow control valve (2) to open and the opening degree is A3. Where A1 < A2 < A3.

Images