Section valve, stove containing same, and gas control method

Abstract

The present invention discloses a section valve, a stove including the same, and a gas control method. The section valve includes a gas knob. Along the rotation direction of the gas knob, the section valve has a low-load gas interval and a high-load gas interval in sequence. The section valve also includes a limiting structure. The limiting structure is arranged corresponding to the gas knob and is used to limit the gas knob from rotating from the low-load gas interval to the high-load gas interval. When the gas knob performs a non-rotational movement relative to the limiting structure, the limiting structure releases the rotation restriction on the gas knob. The section valve is convenient for users to operate on demand, and realizes the user's zoned convenience cooking to meet the use needs of different users. At the same time, the section valve is provided with a limiting structure, which can control the sudden increase in firepower due to operational errors and thus cannot be controlled, resulting in unpredictable consequences, thereby improving its operational safety and feasibility, and ensuring that the entire cooking process can be carried out safely.

Description

Technical Field

[0001] The present invention relates to the technical field of gas cookers, and in particular to a stage valve, a cooker comprising the stage valve, and a gas control method. Background Art

[0002] With the development of the stove industry, the load and thermal efficiency of gas stoves are getting higher and higher, and the effective heat load during cooking is also getting larger and larger. However, actual users do not need such a large load most of the time in daily cooking. Only in special occasions such as restaurants, for example, when stir-frying, do they need a larger firepower. Therefore, in the prior art, most gas knobs can reach a higher valve flow rate by just turning or touching. However, if you do not want to reach the maximum firepower, due to an operating error, you touch it lightly or accidentally turn the knob, or you want to turn the button but accidentally turn it to the maximum to increase the firepower, which may cause some unpredictable consequences, such as the situation being out of control due to too much firepower. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the valve body flow is too low and the firepower is difficult to control due to operating errors, and to provide a stage valve, a stove containing the same, and a gas control method.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A section valve, the section valve comprising a gas knob, wherein along the rotation direction of the gas knob, the section valve has a low-load gas interval and a high-load gas interval in sequence, the section valve also comprising a limiting structure, the limiting structure being arranged corresponding to the gas knob and being used to limit the gas knob from rotating from the low-load gas interval to the high-load gas interval; when the gas knob performs a non-rotational motion relative to the limiting structure, the limiting structure releases the rotation restriction on the gas knob.

[0006] In this solution, the above-mentioned structural form is adopted, and low-load gas intervals and high-load gas intervals are set on the segment valve, which is convenient for users to operate on demand and realizes the user's zoned convenience cooking to meet the different user needs. At the same time, the segment valve is provided with a limit structure, which can control the sudden increase in firepower due to operational errors and thus prevent unpredictable consequences, thereby improving its operational safety and feasibility and ensuring that the entire cooking process can be carried out safely.

[0007] In addition, when users switch between normal fire cooking mode and high fire cooking mode, they only need to keep holding the gas knob to operate it, which helps to reduce the difficulty of operation. For the stove, there can be fewer buttons on the panel, which improves the appearance.

[0008] Preferably, when the gas knob moves perpendicularly to the rotation direction relative to the limiting structure, the limiting structure releases the rotation restriction on the gas knob. Manipulating the gas knob to move perpendicularly to the rotation direction is more convenient for the user to operate, and reduces the difficulty of operation when the user consciously switches from a low-load gas range to a high-load gas range. Therefore, this operation scheme can better meet the different needs of users and is easy to control the firepower.

[0009] Preferably, when the gas knob rotates in the high-load gas interval in a direction away from the low-load gas interval, the gas output flow of the stage valve changes from low to high, thereby avoiding a safety hazard caused by a sudden increase in firepower.

[0010] Preferably, the maximum output flow rate of the gas knob in the high-load gas interval is greater than the maximum gas output flow rate of the gas knob in the low-load gas interval. There are clear output flow ranges in different intervals, which can better control the required firepower, and also make the gas output of the stage valve more in line with the user's daily cooking needs when the knob is in the low-load gas interval.

[0011] Preferably, when the gas knob is between the low-load gas interval and the high-load gas interval, the outer ring gas output flow rate of the stage valve is lower than the inner ring gas output flow rate.

[0012] Preferably, when the gas knob is between the low-load gas interval and the high-load gas interval, the gas output flow rate of the outer ring of the stage valve is 0. This structural arrangement enables the outer ring of the burner connected to the stage valve to extinguish when the knob is rotated between the low-load gas interval and the high-load gas interval, so as to better match the flame distribution habits of the user during daily operation.

[0013] Preferably, the section valve also includes a valve body and a switch shaft, the switch shaft is installed on the valve body, and extends outward on the surface of the switch shaft along an axial direction not facing the switch shaft to form a valve stem, the valve body includes a rotation limit surface, the axial direction of the rotation limit surface coincides with the axial direction of the switch shaft, and the valve stem abuts against the rotation limit surface.

[0014] Preferably, the gas knob is connected to the switch shaft and is located at one end of the switch shaft close to the rotation limit surface. The gas knob is at the top of the switch shaft, which is the end for outdoor user operation and control, that is, the gas knob is installed at the top of the switch shaft, so that the user can better operate the gas knob.

[0015] Preferably, the rotation limit surface is arranged in a direction away from the gas knob, and the section valve further comprises an elastic member, one end of which is against the switch shaft, and the elastic member is used to apply a force to the switch shaft along the axial direction of the valve stem, so that the valve stem remains in contact with the rotation limit surface. In a normal and natural state, the switch shaft will be in a vertical downward state, so the elastic member is arranged between the switch shaft and the gas knob, so that the switch shaft can be kept in a high position throughout the whole process, so that the valve stem and the rotation limit surface are always in contact, so that the gas knob can rotate the switch shaft, and the switch shaft drives the valve stem to move perpendicular to the circumferential direction of the switch shaft on the rotation limit surface, so that the valve stem rotates in different gas intervals on the rotation limit surface, thereby outputting different valve body flow rates, that is, controlling the firepower.

[0016] Preferably, the limiting structure includes a limiting groove, which is arranged on the rotation limiting surface and is used to accommodate the valve stem along the axial direction of the valve stem. The limiting groove accommodates the valve stem, and the rotation of the valve stem on the rotation limiting surface can be controlled by a non-rotational action, thereby avoiding a sudden increase in firepower due to operational errors, resulting in unpredictable consequences.

[0017] Preferably, when the gas knob is in an initial state, the valve stem and the limiting groove are symmetrical about the switch axis on the rotation limiting surface.

[0018] Preferably, when the gas knob is in the initial state, the valve stem and the limit groove separate the low-load gas interval from the high-load gas interval on the rotation limit surface. When the gas knob is in the initial state, the valve stem and the limit groove form a straight line passing through the switch axis and divide the rotation limit surface into two intervals of similar size, that is, separating the low-load gas interval from the high-load gas interval becomes more obvious.

[0019] Preferably, the rotation limit surface is provided with a first protrusion and a second protrusion, the first protrusion is located in the low-load gas interval, and the second protrusion is located in the high-load gas interval. Protrusions are provided in different gas intervals, and the movement of the valve stem on the protrusions enables the user to have a sense of gear position when rotating the knob, thereby controlling different firepower in different intervals.

[0020] Preferably, a maximum height of the second protrusion relative to the rotation limiting surface is equal to a maximum height of the first protrusion relative to the rotation limiting surface.

[0021] Preferably, the valve stem is cylindrical in shape, which makes it easier for the valve stem to rotate on the rotation limit surface.

[0022] Preferably, the protrusion height of the second protrusion relative to the rotation limit surface is greater than the diameter of the valve stem. When the valve stem rotates from the first protrusion in the low-load gas range to the high-load gas range, it must pass through the limit groove, the valve stem is placed in the limit groove, and the second protrusion is in the high-load gas range, so the maximum height of the second protrusion relative to the rotation limit surface must be greater than the diameter of the valve stem, so that the limit groove can better clamp the valve stem, thereby avoiding a sharp increase in firepower due to operational errors.

[0023] Preferably, the first protrusion has a slope section, and the slope section includes a highest end and a lowest end, the end close to the limit groove is the lowest end, and the end away from the limit groove is the highest end. The first protrusion is set as a slope section, and the end close to the limit groove is the lowest end, so that when the valve stem rotates on the first protrusion to the second protrusion passing through the limit groove, it can be better rotated into the limit groove, avoiding the first protrusion being too high relative to the rotation limit surface, causing the valve stem to be damaged when transitioning to the limit groove and generating abnormal operation sound, and enhancing the service life of the valve stem. And the first protrusion is set as a slope section, and a plurality of small grooves are provided on the slope section, and the plurality of small grooves are arranged at intervals, and the depth of each groove is the same, then from the highest end to the lowest end of the slope section, as the height of the slope relative to the rotation limit surface decreases, the lowest end of the groove gradually approaches the rotation limit surface. The purpose of setting these grooves is that when the gas knob is rotated, the gas knob drives the valve stem to rotate on the first protrusion, and when passing through the groove, the gear sense is realized, thereby improving the user's operating feel. When the valve stem rotates on the first protrusion, the gas knob rotates to different angles in the low-load gas range, which will produce different fire powers.

[0024] Preferably, the height difference of the lowest end relative to the rotation limiting surface is smaller than the radius of the valve stem.

[0025] Preferably, the lowest end is an arc-shaped surface, and the arc-shaped surface of the lowest end is adapted to the arc-shaped surface of the valve stem. The lowest end of the slope section is arranged in such a structural form, so that the valve stem can be rotated into the limiting groove better.

[0026] Preferably, the stage valve further comprises a shift fork, wherein the shift fork is located at an end of the switch shaft away from the gas knob, and a valve body reserved gap exists between the shift fork and the switch shaft.

[0027] Preferably, the valve body reserved gap is larger than the highest height of the second protrusion relative to the rotation limit surface. As described above, when the valve stem rotates on the protrusion of the rotation limit surface, the valve stem needs to be rotated on the protrusion by operating the switch shaft in the axial direction. Therefore, when the gas knob is operated in the axial direction of the switch shaft, the switch shaft is also driven to move in its axial direction, so the switch shaft will be close to the fork. When the valve stem needs to be rotated out of the limit groove to the second protrusion, the distance between the fork and the switch shaft, that is, the valve body reserved gap, must be larger than the highest height of the second protrusion relative to the rotation limit surface, so as to ensure that the switch shaft will not contact the fork. The fork is connected to the solenoid valve, that is, to ensure that the switch shaft will not push the fork away to stop the solenoid valve from working.

[0028] A cooking appliance comprises the above-mentioned stage valve.

[0029] By setting the stage valve, the stove only needs to be provided with one gas knob on the stove panel, which can satisfy the user's need to switch between a normal fire cooking mode and a high fire cooking mode while ensuring safety. Therefore, the number of control buttons on the stove panel can be reduced, thereby improving the aesthetics of the product.

[0030] A gas control method controls the gas flow by rotating a gas knob, the gas control method comprising: setting a high-load and low-gas interval at the end of a low-load gas interval of the gas knob along the rotation direction of the gas knob; a limit exists when the gas knob rotates from the low-load gas interval to the high-load and low-gas interval, and the limit is unlocked by the non-rotational movement of the gas knob.

[0031] The gas control method sets a low-load gas interval and a high-load gas interval when the user adjusts the gas flow by rotating the gas knob, so as to facilitate the user to operate on demand and realize the user's zoned convenience cooking to meet the different user needs. At the same time, the user must manipulate the knob to make a non-rotating movement to switch from the low-load gas interval to the high-load gas interval, so as to avoid the sudden increase of fire power due to operation errors and the uncontrollable and unpredictable consequences, thereby improving the safety and feasibility of the operation and ensuring that the entire cooking process can be carried out safely.

[0032] In addition, when users switch between the low-load gas range and the high-load gas range, they only need to keep holding the gas knob to operate, which helps to reduce the difficulty of operation. For stoves that use this gas control method, there can be fewer buttons on the panel, improving the appearance.

[0033] The positive and progressive effect of the present invention is that the segment valve is respectively provided with a low-load gas interval and a high-load gas interval, which is convenient for users to operate on demand and realizes the user's zoned convenience cooking to meet the different user needs. At the same time, the segment valve is provided with a limit structure, which can control the sudden increase in firepower due to operation errors and thus prevent unpredictable consequences, thereby improving its operational safety and feasibility and ensuring that the entire cooking process can be carried out safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of a top view of the section valve of Example 1 of the present invention.

[0035] Figure 2 This is a schematic diagram of the overall structure of the section valve of Example 2 of the present invention.

[0036] Figure 3 It is a schematic diagram of the three-dimensional structure of the section valve of Example 2 of the present invention.

[0037] Figure 4 It is a schematic structural diagram of the rotation limiting surface of Example 2 of the present invention.

[0038] Figure 5 It is a schematic structural diagram of the rotation limit surface and the switch shaft of Example 2 of the present invention.

[0039] Figure 6 for Figure 5 A partial enlarged schematic diagram of part A.

[0040] Description of reference numerals:

[0041] Section valve 1

[0042] Valve body 2

[0043] Gas knob 3

[0044] Switch axis 4

[0045] Stem 5

[0046] Rotation limit surface 6

[0047] Low load gas range 7

[0048] The first protrusion 71

[0049] Slope section 711

[0050] Highest-end 7111

[0051] Lowest end 7112

[0052] High load gas range 8

[0053] The second protrusion 81

[0054] Fork 9

[0055] Valve body reserved clearance 91

[0056] Limiting slot 10

[0057] Solenoid valve 11 DETAILED DESCRIPTION

[0058] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0059] Example 1

[0060] like Figure 1 This embodiment provides a stage valve 1 and a stove using the stage valve 1 to control cooking fire. The stage valve 1 includes a gas knob 3. Along the rotation direction of the gas knob 3, the stage valve 1 has a low-load gas interval 7 and a high-load gas interval 8 in sequence. When the gas knob 3 is rotated and in the low-load gas interval 7, the gas flow rate that the stage valve 1 can output is relatively small, and when the gas knob 3 is rotated and in the high-load gas interval 8, the gas flow rate that the stage valve 1 can output is relatively large.

[0061] In this embodiment, when the rotation angle of the gas knob 3 is between 0° and 240°, the gas knob 3 is located in the low-load gas interval 7. Specifically, when the gas knob 3 starts to rotate from 0°, the flow rate output by the stage valve 1 gradually increases from 0, reaches a maximum of 4.5KW at 90°, and then gradually decreases, and reaches a minimum of 400W at 240° (for example, the output flow rate is 0), to match the user's gas operation habits during regular cooking. When the gas knob 3 starts to be restarted, the gas flow rate generated at the moment of pressing down is 400W. When the rotation angle of the gas knob 3 is between 240° and 275°, the gas knob 3 is located in the high-load gas interval 8. The output flow rate of the gas knob 3 from 240° is 500W. The gas knob 3 continues to rotate. When it rotates to 275°, the output flow rate reaches a maximum of 5.2KW. In the high-load gas interval, the "one-button stir-frying" function can be realized to meet the different needs of different users. (The specific values ​​of the interval size and the output gas flow rate described in this implementation are variable and depend on the specific situation.)

[0062] In addition, the segment valve 1 also includes a limit structure, which is located between 180° and 200°. The limit structure corresponds to the gas knob 3. The function of the limit structure is to limit the rotation of the gas knob 3 from the low-load gas interval 7 to the high-load gas interval 8. The structure of the limit structure should be set to: only when the gas knob 3 performs non-rotational movement relative to the limit structure, the limit structure will release the rotation restriction of the gas knob 3, so that the gas knob 3 can smoothly rotate from the low-load gas interval 7 to the high-load gas interval 8. By setting the low-load gas interval 7 and the high-load gas interval 8 on the segment valve 1, it is convenient for users to operate on demand by rotating the gas knob, and realize the user's zoned convenience cooking to meet the different user needs. At the same time, the segment valve 1 is provided with a limit structure, so that the user cannot switch from the low-load gas interval 7 to the high-load gas interval 8 by a simple rotation operation, so as to avoid the user rotating the knob due to an operational error, resulting in a sharp increase in firepower and uncontrollable, resulting in unpredictable consequences. Therefore, the structural setting of the stage valve not only facilitates the user to simply operate to control the cooking fire power, but also improves its operational safety and feasibility, ensuring that the entire cooking process is carried out in a safe state.

[0063] In addition, the user can switch between the normal fire cooking mode and the high fire cooking mode by simply holding the gas knob 3, which helps to reduce the difficulty of operation. For the stove, there can be fewer buttons on the panel, which improves the appearance.

[0064] Among them, the specific structural setting of the above-mentioned limiting structure can be implemented by adopting the relevant structural setting scheme existing in the prior art. For example, by setting a sensor to detect the movement state of the gas knob 3 between the low-load gas interval 7 and the high-load gas interval 8, only when the gas knob 3 performs a non-rotational operation (such as upward translation, downward translation movement, etc.) at this location, the sensor generates a signal to release the limit on the gas knob 3, so that the gas knob 3 can be smoothly rotated to the high-load gas interval 8.

[0065] For the gas knob 3, in the scope of all "non-rotation operations", it is relatively preferred to make the gas knob 3 move perpendicular to the rotation direction, for example, pressing or pulling the gas knob 3 to release the rotation restriction of the limit structure on the gas knob 3. This type of "movement perpendicular to the rotation direction" is more convenient for users to implement, can better meet the different needs of users, and is easy to control the fire power.

[0066] In addition, the description of the gas output of the stage valve 1 when the gas knob 3 is in the low-load gas interval 7 and the high-load gas interval 8 in this embodiment is only for illustrative purposes. That is, when the gas knob 3 is in the low-load gas interval 7, the maximum gas flow rate that the stage valve 1 can output is A, and when the gas knob 3 is in the high-load gas interval 8, the maximum gas flow rate that the stage valve 1 can output is B. To achieve the above purpose, it is only necessary that B>A.

[0067] Example 2

[0068] This embodiment also provides a segment valve and a stove using the segment valve to control cooking firepower. The structure of the segment valve is roughly the same as that of the segment valve provided in Example 1. The difference is that this embodiment provides a preferred structural setting scheme of the limit structure of the segment valve: Figure 2-6 As shown, the limiting structure in this embodiment is configured such that the rotation restriction of the gas knob 3 by the limiting structure can be contacted only when the gas knob 3 is pressed relative to the limiting structure.

[0069] Specifically, when the gas knob 3 rotates in the high-load gas interval 8 in a direction away from the low-load gas interval 7, the gas output flow rate of the stage valve 1 changes from low to high. The low-load gas interval 7 and the high-load gas interval 8 are set on the stage valve 1, so that different valve body 2 output flows can be used in different intervals, that is, different fire powers can be controlled.

[0070] Specifically, the maximum output flow of the gas knob 3 in the high-load gas interval 8 is greater than the maximum gas output flow of the gas knob 3 in the low-load gas interval 7. By implementing different firepower controls in different intervals and having a clear output flow range, the required firepower can be better controlled.

[0071] Specifically, when the gas knob 3 is between the low-load gas interval 7 and the high-load gas interval 8, the outer ring gas output flow rate of the stage valve 1 is lower than the inner ring gas output flow rate. When the gas knob 3 is between the low-load gas interval 7 and the high-load gas interval 8, the outer ring gas output flow rate of the stage valve 1 is 0.

[0072] like Figure 2As shown, the stage valve 1 also includes a valve body 2 and a switch shaft 4. The switch shaft 4 is installed on the valve body 2. The switch shaft 4 is located on the central axis that runs through the entire valve body 2. The valve stem 5 is formed by extending outward along the axial direction that is not toward the switch shaft 4, specifically in the radial direction of the switch shaft 4 in this embodiment. The valve body 2 also includes a rotation limit surface 6. When the entire valve body 2 is viewed from bottom to top, the rotation limit surface 6 can be observed. The rotation limit surface 6 is mostly circular, so the axial direction of the center of the rotation limit surface 6 coincides with the axial direction of the switch shaft 4, and the valve stem 5 abuts against the rotation limit surface 6. The gas knob 3 is connected to the switch shaft 4, and the gas knob 3 is located at one end of the switch shaft 4 close to the rotation limit surface 6. When the entire valve body 2 is viewed from top to bottom, the gas knob 3 can be observed but the rotation limit surface 6 cannot be seen. The switch shaft 4 passes through the valve body 2, and a gas knob 3 is provided on the upper surface of the valve body 2. The gas knob 3 is on the upper surface of the switch shaft 4, and the gas knob 3 is at the top of the switch shaft 4, which is an end for outdoor users to operate and control, that is, the gas knob 3 is installed at the top of the switch shaft 4, and the user can better operate the gas knob 3. The specific implementation method is: the user operates the gas knob 3 on the upper surface of the rotating valve body 2, and the gas knob 3 drives the rotation of the switch shaft 4, and the switch shaft 4 drives the valve stem 5 to rotate on the rotation limit surface 6, so that the valve stem 5 is located in different gas intervals, and then adjusts different firepower.

[0073] Specifically, the rotation limit surface 6 is arranged in a direction away from the gas knob 3. Under normal circumstances, any component will be in a vertical downward state, so the stage valve 1 also includes an elastic member (not shown in the figure), one end of the elastic member is against the switch shaft 4, and the elastic member is used to apply a force to the switch shaft 4 along the axial direction of the valve stem 5, so that the valve stem 5 keeps in contact with the rotation limit surface 6 throughout the entire process. The elastic member is located inside the switch shaft 4 and the gas knob 3, so the elastic member is arranged between the switch shaft 4 and the gas knob 3, so that the switch shaft 4 can be kept in a high position throughout the entire process, so that the valve stem 5 and the rotation limit surface 6 are always in contact, and the gas knob 3 is realized by rotating the switch shaft 4. As mentioned above, the switch shaft 4 drives the valve stem 5 to move perpendicular to the circumferential direction of the switch shaft 4 on the rotation limit surface 6, so that the valve stem 5 rotates in different gas intervals on the rotation limit surface 6, thereby outputting different valve body 2 flow rates, that is, controlling the firepower.

[0074] like Figure 4-6As shown, the limiting structure (not shown in the figure) includes a limiting groove 10. The limiting groove 10 is provided in the section where the limiting structure is located. The limiting groove 10 is provided on the rotation limiting surface 6, and is used to accommodate the valve stem 5 along the axial direction of the valve stem 5. The limiting groove 10 is located on the surface of the rotation limiting surface 6, so when a pressing operation is adopted, the rotation restriction of the gas knob 3 by the limiting structure can be contacted. The limiting groove 10 is provided to accommodate the valve stem 5, so that the rotation of the valve stem 5 directly on the rotation limiting surface 6 can be controlled by a pressing operation, thereby avoiding a sudden increase in firepower due to an operational error, resulting in unpredictable consequences.

[0075] Specifically, when the gas knob 3 is in the initial state, that is, the valve stem 5 is located at 0° of the rotation limit surface 6, the valve stem 5 and the limit groove 10 are symmetrical about the switch axis 4 on the rotation limit surface 6, and the three form a straight line. In other embodiments, the symmetrical form may not be adopted, and the positions of the valve stem 5, the switch axis 4 and the limit groove 10 are set according to the layout structure of different gas intervals on the rotation limit surface 6. When the gas knob 3 is in the initial state, the valve stem 5 and the limit groove 10 separate the low-load gas interval 7 and the high-load gas interval 8 on the rotation limit surface 6, making the layout structure of the high-load gas interval 8 and the low-load gas interval 7 more obvious and convenient for operation, avoiding the valve stem 5 being located in the wrong gas interval due to a slight error when rotating the gas knob 3 because the low-load gas interval 7 and the high-load gas interval 8 are too close.

[0076] like Figure 4-6 As shown, the rotation limit surface 6 is provided with a first protrusion 71 and a second protrusion 81, the first protrusion 71 is located in the low-load gas interval 7, and the second protrusion 81 is located in the high-load gas interval 8. When the overall stage valve 1 is viewed from the front, there are protrusions protruding downward on the surface of the rotation limit surface 6, and it is divided into different protrusions in different intervals, namely the first protrusion 71 and the second protrusion 81. As mentioned above, the first protrusion 71 and the second protrusion 81 form a limiting groove 10 on the rotation limit surface 6 relative to the switch shaft 4 and corresponding to the valve stem 5, so that the rotation limit surface 6 is kept smooth and complete, and there is no other concave structure. This embodiment requires rotating and pressing the gas knob 3 to control the rotation of the valve stem 5 on the rotation limit surface 6. Protrusions are set on different gas intervals, and the movement of the valve stem 5 on the protrusions is driven by the gas knob 3, so as to control different firepower sizes in different intervals.

[0077] Specifically, the highest height of the second protrusion 81 relative to the rotation limit surface 6 is equal to the highest height of the first protrusion 71 relative to the rotation limit surface 6. The shape of the valve stem 5 is cylindrical or spherical.

[0078] like Figure 4As shown, the protrusion height of the second protrusion 81 relative to the rotation limit surface 6 is greater than the diameter of the valve stem 5. When the valve stem 5 rotates from the first protrusion 71 in the low-load gas interval 7 to the high-load gas interval 8, it must pass through the limit groove 10. The valve stem 5 is placed in the limit groove 10, and the second protrusion 81 is on the high-load gas interval 8. Therefore, the highest height of the second protrusion 81 relative to the rotation limit surface 6 must be greater than the diameter of the valve stem 5, so that the limit groove 10 can better clamp the valve stem 5. When the gas knob 3 is rotated to the high-load gas interval 8, the gas knob 3 needs to be pressed to rotate the valve stem 5 out of the limit groove 10 to the high-load gas interval 8, thereby avoiding a sharp increase in firepower due to operational errors.

[0079] like Figure 6 As shown, the first protrusion 71 has a slope section 711, and the slope section 711 includes a highest end 7111 and a lowest end 7112. The end close to the limiting groove 10 is the lowest end 7112, and the end away from the limiting groove 10 is the highest end 7111, that is, the first protrusion 71 presents a state of gradually decreasing slope from the initial position of the valve stem 5 to the limiting groove 10; the first protrusion 71 is set as the slope section 711, and the height difference of the lowest end 7112 relative to the rotation limiting surface 6 is smaller than the radius of the valve stem 5, and the lowest end 7112 is an arcuate surface, and the arcuate surface of the lowest end 7112 is adapted to the arcuate surface of the valve stem 5, so that it can be better rotated into the limiting groove 10, avoiding the first protrusion 71 from being too high relative to the rotation limiting surface 6, causing the valve stem 5 to be damaged when transitioning to the limiting groove 10 and emitting sounds caused by abnormal operation, and enhancing the service life of the valve stem 5. Figure 6 As shown in , the first protrusion 71 is set as a slope section 711, and a plurality of small grooves (not marked in the figure) are provided on the slope section 711. The plurality of small grooves are arranged at intervals, and the depth of each groove is the same. Then, from the highest end 7111 to the lowest end 7112 of the slope section 711, as the height of the slope relative to the rotation limit surface 6 decreases, the lowest end of the groove gradually approaches the rotation limit surface 6. The purpose of setting these grooves is that when the gas knob 3 is rotated, the gas knob 3 drives the valve stem 5 to rotate on the first protrusion 71, and when passing through the groove, the gear sense is realized, thereby improving the user's operating feel. And when the valve stem 5 rotates on the first protrusion 71, the gas knob 3 rotates to different angles in the low-load gas interval 7, and different firepower sizes will be generated. That is, as described above, when the gas knob 3 starts to rotate from 0°, the flow output by the stage valve 1 gradually increases from 0, reaches the maximum value at 90°, and then gradually decreases, and reaches the minimum value at 240°.

[0080] like Figure 2As shown, the stage valve 1 also includes a shift fork 9, which is located at one end of the switch shaft 4 away from the gas knob 3, and there is a valve body reserved gap 91 between the shift fork 9 and the switch shaft 4; the valve body reserved gap 91 is greater than the highest height of the second protrusion 81 relative to the rotation limit surface 6. As mentioned above, when the valve stem 5 rotates on the first protrusion 71 and the second protrusion 81 of the rotation limit surface 6, it is necessary to operate the switch shaft 4 in the axial direction to make the valve stem 5 rotate thereon, so when the gas knob 3 is operated in the axial direction of the switch shaft 4, that is, when the gas knob 3 is pressed in the operation mode, the valve stem 5 is pressed on the first protrusion 71, and when the gas knob 3 is pressed, the switch shaft 4 is also driven to move in its axial direction, so the switch shaft 4 will be close to the shift fork 9, and when the gas knob 3 is pressed and rotated again to rotate to When in the high-load gas interval 8, the valve stem 5 needs to be rotated out of the limit groove 10 to the second protrusion 81, so the switch shaft 4 will be close to the fork 9 for the second time. Therefore, the distance between the fork 9 and the switch shaft 4, that is, the valve body reserved gap 91, must be greater than the maximum height of the second protrusion 81 relative to the rotation limit surface 6, so as to ensure that the switch shaft 4 will not contact the fork 9 when the gas knob 3 is pressed and rotated, and the fork 9 is connected to the solenoid valve 11, that is, to ensure that the switch shaft 4 will not push the fork 9, causing the solenoid valve 11 to stop working or cause gas leakage.

[0081] In addition, the present embodiment also provides a gas control method, specifically controlling the gas flow by rotating the gas knob 3, and the gas control method specifically includes: setting a high-load and low-gas interval at the end of the low-load gas interval 7 of the gas knob 3 along the rotation direction of the gas knob 3; there is a limit when the gas knob 3 rotates from the low-load gas interval 7 to the high-load and low-gas interval, and the limit is unlocked by the non-rotational movement of the gas knob 3, so that the gas knob can rotate from the low-load gas interval to the high-load and low-gas interval.

[0082] The control method can be implemented as follows: the valve stem 5 is installed in the radial direction of the switch shaft 4 in the first direction of the rotation limit surface 6, then the first protrusion 71 is located in the interval from the first direction to the first direction rotated 180° clockwise, the second protrusion 81 is located in the interval from the first direction rotated 200° clockwise to the first direction rotated 275° clockwise, then the limit groove 10 is located in the interval from the first direction rotated 180° clockwise to the first direction rotated 200° clockwise, between the first protrusion 71 and the second protrusion 81. Then the gas knob 3 starts to rotate clockwise, driving the valve stem 5 to rotate on the first protrusion 71, passing through the low-load gas interval 7. When it rotates 180° clockwise in the first direction, the valve stem 5 is placed in the limit groove 10. By pressing and rotating the gas knob 3 and other operations, the valve stem 5 leaves the limit groove 10 between the low-load gas interval 7 and the high-load low-gas interval, and then continues to rotate the gas knob 3 from 200° clockwise in the first direction to 275° clockwise, that is, driving the valve stem 5 to rotate on the second protrusion 81 and move to the high-load gas interval 8, so that the gas output is switched to a higher level to meet the user's firepower requirements for cooking such as stir-frying.

[0083] The angle of rotating the gas knob 3 corresponding to the operation method of this embodiment is limited to this embodiment, and the specific rotation angle can be specifically set according to the specific low-load gas interval 7, high-load gas interval 8 and the layout structure of the limit structure.

[0084] Example 3

[0085] This embodiment also provides a segment valve and a stove using the segment valve to control cooking firepower. The structure of the segment valve is roughly the same as that of the segment valve provided in Example 2. The difference is that this embodiment provides a preferred structural setting scheme of the limit structure of the segment valve: Figure 1-2 As shown, the limiting structure in this embodiment is configured such that the rotation restriction of the gas knob by the limiting structure can be contacted only when the gas knob is pulled relative to the limiting structure.

[0086] Specifically, the limiting structure includes a limiting groove, and the limiting groove is provided in the section where the limiting structure is located, and the limiting groove is provided on the rotation limiting surface, and is used to accommodate the valve stem along the axial direction of the valve stem. The limiting structure is recessed in the rotation limiting surface, that is, the limiting groove cannot be seen when looking directly at the stage valve. The limiting groove is provided to accommodate the valve stem, and the rotation of the valve stem on the rotation limiting surface can be controlled directly by pressing operation, thereby avoiding a sudden increase in firepower due to operational errors, resulting in unpredictable consequences.

[0087] Specifically, the structural form of the first protrusion and the second protrusion on the rotation limit surface is as follows: when looking directly at the whole section valve, no other structure can be seen on the rotation limit surface, that is, the first protrusion and the second protrusion are recessed in the rotation limit surface, and the first protrusion and the second protrusion form a limit groove relative to the switch axis and corresponding to the valve stem, so that there is no other redundant structure on the rotation limit surface, which has the advantage of saving space for the section valve. This implementation method requires rotating and pulling the gas knob to control the rotation of the valve stem on the rotation limit surface. Protrusions are set on different gas intervals, and the movement of the valve stem on the protrusion is driven by the gas knob to control different firepower sizes in different intervals.

[0088] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A sectional valve, the sectional valve comprising a gas knob, It is characterized in that Along the rotation direction of the gas knob, the section valve has a low-load gas interval and a high-load gas interval in sequence. The stage valve further includes a limit structure, which is arranged corresponding to the gas knob and is used to limit the gas knob from rotating from the low-load gas range to the high-load gas range; When the gas knob performs non-rotational motion relative to the limiting structure, the limiting structure releases the rotation restriction on the gas knob; When the gas knob moves perpendicular to the rotation direction relative to the limiting structure, the limiting structure releases the rotation restriction on the gas knob; When the gas knob rotates in the high-load gas interval in a direction away from the low-load gas interval, the gas output flow rate of the stage valve changes from low to high.

2. The segment valve according to claim 1, It is characterized in that The maximum output flow rate of the gas knob in the high-load gas interval is greater than the maximum gas output flow rate of the gas knob in the low-load gas interval.

3. The segment valve according to claim 1, It is characterized in that When the gas knob is between the low-load gas interval and the high-load gas interval, the outer ring gas output flow rate of the stage valve is lower than the inner ring gas output flow rate.

4. The segment valve according to claim 3, It is characterized in that When the gas knob is between the low-load gas interval and the high-load gas interval, the outer ring gas output flow rate of the stage valve is 0.

5. The segment valve according to claim 1, It is characterized in that The section valve also includes a valve body and a switch shaft. The switch shaft is mounted on the valve body. A valve stem is formed by extending outwardly from the surface of the switch shaft along an axial direction not facing the switch shaft, The valve body comprises a rotation limiting surface, the axial direction of the rotation limiting surface coincides with the axial direction of the switch shaft, and the valve stem abuts against the rotation limiting surface.

6. The sectional valve according to claim 5, It is characterized in that The gas knob is connected to the switch shaft and is located at one end of the switch shaft close to the rotation limit surface.

7. The sectional valve according to claim 5, It is characterized in that The rotation limit surface is arranged in a direction away from the gas knob, and the section valve also includes an elastic member, one end of which is against the switch shaft, and the elastic member is used to apply a force to the switch shaft along the axial direction of the valve stem to keep the valve stem in contact with the rotation limit surface.

8. The segment valve according to claim 5, It is characterized in that The limiting structure comprises a limiting groove, which is arranged on the rotation limiting surface and is used to accommodate the valve stem along the axial direction of the valve stem.

9. The sectional valve according to claim 8, It is characterized in that When the gas knob is in an initial state, the valve stem and the limiting groove are symmetrical about the switch axis on the rotation limiting surface.

10. The segment valve according to claim 9, It is characterized in that When the gas knob is in an initial state, the valve stem and the limiting groove separate the low-load gas interval from the high-load gas interval on the rotation limiting surface.

11. The sectional valve according to claim 5, It is characterized in that The rotation limiting surface is provided with a first protrusion and a second protrusion, the first protrusion is located in the low-load gas interval, and the second protrusion is located in the high-load gas interval.

12. The sectional valve according to claim 11, It is characterized in that A maximum height of the second protrusion relative to the rotation limiting surface is equal to a maximum height of the first protrusion relative to the rotation limiting surface.

13. The segment valve according to claim 5, It is characterized in that The valve stem is cylindrical in shape.

14. The segment valve according to claim 11, It is characterized in that A protrusion height of the second protrusion relative to the rotation limiting surface is greater than a diameter of the valve stem.

15. The sectional valve according to claim 11, It is characterized in that The first protrusion has a slope section, and the slope section includes a highest end and a lowest end, the end close to the limiting groove is the lowest end, and the end away from the limiting groove is the highest end.

16. The sectional valve according to claim 15, It is characterized in that The height difference of the lowest end relative to the rotation limiting surface is smaller than the radius of the valve stem.

17. The sectional valve according to claim 16, It is characterized in that The lowest end is an arc-shaped surface, and the arc-shaped surface of the lowest end is adapted to the arc-shaped surface of the valve stem.

18. The sectional valve according to claim 5, It is characterized in that The stage valve further comprises a shift fork, wherein the shift fork is located at an end of the switch shaft away from the gas knob, and a valve body reserved gap exists between the shift fork and the switch shaft.

19. The sectional valve according to claim 18, It is characterized in that The reserved gap of the valve body is greater than the highest height of the second protrusion relative to the rotation limiting surface.

20. A cooking appliance, It is characterized in that It comprises a segment valve as described in any one of claims 1-19.

21. A gas control method, which controls the gas flow by rotating the gas knob. It is characterized in that The gas control method comprises: Along the rotation direction of the gas knob, a high-load low-gas interval is set at the end of the low-load gas interval of the gas knob; There is a limit when the gas knob rotates from the low-load gas range to the high-load low-gas range, and the limit is unlocked by the non-rotational movement of the gas knob.

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