Gas stove

Abstract

The present application relates to the technical field of kitchen appliances, and discloses a gas stove, wherein the burner has a central hole, the central hole comprises a first channel, a second channel, a third channel and a fourth channel which are sequentially communicated from top to bottom and have sequentially increasing diameters; a dry burning prevention probe is arranged in the central hole; a first limiting sleeve is arranged on the dry burning prevention probe and passes through the second channel and is fixed in the axial direction of the central hole of the burner; a second limiting sleeve is arranged on the dry burning prevention probe and passes through the third channel, the upper end of the second limiting sleeve abuts against the lower end of the first limiting sleeve, and the second limiting sleeve is configured to be matched with the side wall of the third channel during upward movement so that the outer diameter of the upper end of the second limiting sleeve is contracted to tightly hold the dry burning prevention probe; a limiting piece is connected with the burner and abuts against the lower end surface of the second limiting sleeve. The above-mentioned arrangement helps to improve the temperature measurement uniformity and accuracy of the temperature measurement element at the upper end of the dry burning prevention probe.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and more particularly to a gas stove. Background Technology

[0002] The anti-dry-burning probe is a core sensing component for intelligent temperature control and safety protection in gas stoves. It typically has a slender rod-like structure with a temperature sensing element integrated at the head. The rod extends from the burner head through the center hole to the bottom of the pot. The verticality of the probe's installation and its concentricity with the center hole directly determine the sensitivity of the temperature measurement response and the accuracy of the anti-dry-burning detection, which are key factors affecting the false alarm rate and user experience.

[0003] Currently, the conventional installation method is to insert the probe into the center hole at the bottom of the burner head and fix it in place at the lower middle part of the rod body using a locking nut or clamp structure.

[0004] On the one hand, the cantilever effect causes excessive radial runout at the probe tip. Because the fixing point of the anti-dry-burning probe is located in the lower middle part of the rod (near the lower surface of the burner head), while the temperature measuring head is far from the fixing point, a vertically arranged cantilever beam structure is formed. The minute fit gap between the burner head center hole and the fixing seat is amplified by the lever effect of the slender rod, causing significant radial runout of the probe tip. This results in inconsistent distances between the probe and the bottom of the pot, severely affecting temperature measurement uniformity and accuracy.

[0005] On the other hand, the reliability of thin-walled rod connections is poor. The rod of the anti-dry-burning probe is mostly made of thin-walled stainless steel tube. If external threads are machined for connection, the strength of the rod will be severely weakened, leading to the risk of breakage. If a two-half clamping structure is used for locking, the clamping force is difficult to distribute evenly around the entire circumference, which can easily push the slender thin-walled rod off-center, causing the axis of the clamping structure to deviate from the axis of the rod, resulting in centering failure and affecting the temperature measurement uniformity and accuracy of the probe.

[0006] Therefore, there is an urgent need to research a gas stove to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a gas stove that solves the problem in the prior art where the anti-dry-burning probe of the gas stove is prone to radial sway, thereby reducing the uniformity and accuracy of temperature measurement.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A gas stove, comprising: A burner head having a central hole, the central hole comprising a first channel, a second channel, a third channel, and a fourth channel that are connected sequentially from top to bottom and whose diameters increase sequentially; An anti-dry-burning probe, wherein the anti-dry-burning probe is inserted into the central hole; The first limiting sleeve is sleeved on the anti-dry burning probe and passes through the second channel, and is fixed axially relative to the burner head in the central hole; The second limiting sleeve is sleeved on the anti-dry-burning probe and passes through the third channel. The upper end of the second limiting sleeve abuts against the lower end of the first limiting sleeve. The second limiting sleeve is configured to cooperate with the side wall of the third channel during upward movement to reduce the outer diameter of the upper end of the second limiting sleeve and drive the upper end of the internal channel of the second limiting sleeve to close tightly to the anti-dry-burning probe. A limiting member is connected to the furnace head and abuts against the lower end face of the second limiting sleeve.

[0009] As an optional technical solution for a gas stove, at least a portion of the third channel is a diameter gradient section, and the second limiting sleeve is configured to cooperate with the diameter gradient section during upward movement to cause the upper outer diameter of the second limiting sleeve to contract.

[0010] As an optional technical solution for a gas stove, at least a portion of the second limiting sleeve is a frustum conical structure, which cooperates with the diameter gradient portion to reduce the outer diameter of the upper end of the second limiting sleeve.

[0011] As an optional technical solution for a gas stove, the second limiting sleeve has several deformation grooves that connect to the internal channel. The deformation grooves penetrate the upper end face of the second limiting sleeve, and a clamping flap is formed between two adjacent deformation grooves. During the upward movement of the second limiting sleeve, the adjacent clamping flaps move closer to each other to clamp the anti-dry burning probe.

[0012] As an optional technical solution for a gas stove, one of the upper end face of the clamping petal and the lower end face of the first limiting sleeve is provided with a positioning protrusion, and the other is provided with a positioning groove, wherein the positioning protrusion is inserted into the positioning groove.

[0013] As an optional technical solution for a gas stove, each of the clamping petals has a positioning protrusion on its upper end surface, and the lower end surface of the first limiting sleeve has a plurality of positioning grooves, with each positioning protrusion and each positioning groove corresponding to and cooperating with each other.

[0014] As an optional technical solution for a gas stove, the positioning groove is at least larger than the positioning protrusion in the radial dimension of the first limiting sleeve.

[0015] As an optional technical solution for a gas stove, the positioning protrusion is frustoconical, and the diameter of the positioning protrusion gradually increases along the direction away from the positioning groove.

[0016] As an optional technical solution for a gas stove, the limiting member has an internal clearance channel, the anti-dry burning probe passes through the clearance channel, the limiting member has a thread on its outer periphery, the fourth channel is a threaded hole, and the limiting member is threadedly engaged with the fourth channel.

[0017] As an optional technical solution for a gas stove, the limiting component includes a limiting body and a limiting boss connected to each other. The outer periphery of the limiting body is provided with threads and engages with the fourth channel thread. The limiting boss is used to engage with a wrench.

[0018] As an optional technical solution for a gas stove, the first limiting sleeve includes a limiting cylinder and a plurality of limiting protrusions evenly distributed on the outer periphery of the limiting cylinder, wherein the limiting protrusions abut against the side wall of the second channel.

[0019] As an optional technical solution for a gas stove, the gas stove further includes an elastic gasket, which is sleeved on the anti-dry-burning probe and sandwiched between the stepped surface between the first channel and the second channel and the first limiting sleeve, or sandwiched between the first limiting sleeve and the second limiting sleeve, or sandwiched between the second limiting sleeve and the limiting member.

[0020] The present invention has at least the following beneficial effects: This invention provides a gas stove, comprising a burner head, an anti-dry-burning probe, a first limiting sleeve, a second limiting sleeve, and a limiting member. The burner head has a central hole comprising a first channel, a second channel, a third channel, and a fourth channel that are sequentially connected from top to bottom and have progressively increasing diameters. The anti-dry-burning probe passes through the central hole. The first limiting sleeve is fitted onto the anti-dry-burning probe and passes through the second channel, and is axially fixed to the burner head within the central hole. The second limiting sleeve is fitted onto the anti-dry-burning probe and passes through the third channel. The upper end of the second limiting sleeve abuts against the lower end of the first limiting sleeve. The second limiting sleeve is configured to engage with the sidewall of the third channel during upward movement, causing the outer diameter of the upper end of the second limiting sleeve to contract, and causing the upper end of the internal channel of the second limiting sleeve to close tightly around the anti-dry-burning probe. The limiting member is connected to the burner head and abuts against the lower end face of the second limiting sleeve.

[0021] With the above-mentioned configuration, the first and second limiting sleeves are axially limited in the center hole by the contact action of the stepped surface and the limiting component. The setting of the third channel causes the outer diameter of the upper end of the second limiting sleeve to shrink, thereby driving the upper end of the internal channel to close tightly to the anti-dry-burning probe, thus achieving radial fixation of the anti-dry-burning probe, automatic centering, and preventing radial wobble of the anti-dry-burning probe. At the same time, it can also prevent the anti-dry-burning probe from axially moving relative to the second limiting sleeve. Combined with the limitation of the first limiting sleeve and the stepped surface, the axial constraint of the anti-dry-burning probe is completed. In addition, the setting of the first limiting sleeve above the second limiting sleeve can effectively reduce the range of wobble on the upper side of the anti-dry-burning probe fixing point, ensuring the temperature measurement uniformity and accuracy of the temperature measuring element at the upper end of the anti-dry-burning probe. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0023] Figure 1 This is a partial structural diagram of the gas stove in an embodiment of the present invention; Figure 2 This is an exploded view of the gas stove in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first limiting sleeve from a first perspective in an embodiment of the present invention; Figure 4 This is a schematic diagram of the first limiting sleeve from a second perspective in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the second limiting sleeve in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the limiting member in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the gas stove in an embodiment of the present invention; Figure 8 This is a partial cross-sectional view of the gas stove in an embodiment of the present invention.

[0024] In the picture: 100. Stove head; 110. First passage; 111. Step surface; 120. Second passage; 130. Third passage; 140. Fourth passage; 200. Anti-dry-burning probe; 300, First limiting sleeve; 310, Limiting cylinder; 311, Positioning groove; 320, Limiting protrusion; 400. Second limiting sleeve; 401. Internal channel; 410. Deformation groove; 420. Clamping flap; 421. Positioning protrusion; 500. Limiting component; 510. Clearance passage; 520. Limiting body; 530. Limiting boss; 600, elastic gasket; 700. Burner. Detailed Implementation

[0025] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0026] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0027] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0028] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0029] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0030] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0031] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0032] like Figures 1 to 8As shown, this embodiment provides a gas stove, which includes a burner head 100, an anti-dry-burning probe 200, a first limiting sleeve 300, a second limiting sleeve 400, and a limiting member 500. The burner head 100 has a central hole, which includes a first channel 110, a second channel 120, a third channel 130, and a fourth channel 140 that are sequentially connected from top to bottom and have progressively increasing diameters. The anti-dry-burning probe 200 passes through the central hole. The first limiting sleeve 300 is fitted onto the anti-dry-burning probe 200, passes through the second channel 120, and abuts against the first channel 110 and the second channel 140. The step surface 111 between 120; the second limiting sleeve 400 is sleeved on the anti-dry burning probe 200 and passes through the third channel 130. The upper end of the second limiting sleeve 400 abuts against the lower end of the first limiting sleeve 300. The second limiting sleeve 400 is configured to cooperate with the side wall of the third channel 130 during upward movement so that the outer diameter of the upper end of the second limiting sleeve 400 contracts and drives the upper end of the internal channel 401 of the second limiting sleeve 400 to close tightly to the anti-dry burning probe 200; the limiting member 500 is connected to the burner head 100 and abuts against the lower end face of the second limiting sleeve 400.

[0033] With the above-mentioned configuration, the first limiting sleeve 300 and the second limiting sleeve 400 are axially limited in the center hole by the contact action of the stepped surface 111 and the limiting member 500. The setting of the third channel 130 causes the outer diameter of the upper end of the second limiting sleeve 400 to shrink, thereby driving the upper end of the internal channel 401 to close tightly to the anti-dry-burn probe 200, thus achieving radial fixation of the anti-dry-burn probe 200, automatic centering, and preventing radial sway of the anti-dry-burn probe 200. At the same time, it can also prevent the anti-dry-burn probe 200 from axially moving relative to the second limiting sleeve 400. Combined with the limitation of the first limiting sleeve 300 and the stepped surface 111, the axial constraint of the anti-dry-burn probe 200 is completed. In addition, the setting of the first limiting sleeve 300 above the second limiting sleeve 400 can effectively reduce the range of sway on the upper side of the fixing point of the anti-dry-burn probe 200, ensuring the temperature measurement uniformity and temperature measurement accuracy of the temperature measuring element at the upper end of the anti-dry-burn probe 200.

[0034] In some embodiments, at least a portion of the third channel 130 is a diameter-gradient portion, and the second limiting sleeve 400 is configured to engage with the diameter-gradient portion during upward movement to cause the upper outer diameter of the second limiting sleeve 400 to contract. Exemplarily, the third channel 130 is a tapered channel with a gradually increasing aperture from top to bottom, and the outer diameter of the second limiting sleeve 400 is larger than the minimum aperture of the third channel 130. With the above structure, as the second limiting sleeve 400 moves upward, it is gradually compressed by the sidewall of the third channel 130, causing the upper end of the internal channel 401 of the second limiting sleeve 400 to gradually contract, ultimately gripping the anti-dry-burn probe 200 and achieving relative fixation with the anti-dry-burn probe 200.

[0035] In other embodiments, the inner side of the third channel 130 is provided with a plurality of first guide protrusions, and the plurality of first guide protrusions are arranged sequentially along the circumference of the third channel 130 to form a conical channel.

[0036] In some embodiments, at least a portion of the second limiting sleeve 400 is a frustum conical structure, which cooperates with the diameter-gradient portion to reduce the outer diameter of the upper end of the second limiting sleeve 400. Exemplarily, the second limiting sleeve 400 is generally frustum conical in shape, with its outer diameter gradually increasing from top to bottom. The minimum outer diameter of the second limiting sleeve 400 is smaller than the maximum aperture of the third channel 130, and the maximum outer diameter of the second limiting sleeve 400 is larger than the minimum aperture of the third channel 130. This configuration increases the contact area between the sidewalls of the second limiting sleeve 400 and the third channel 130, and increases the reduction portion of the second limiting sleeve 400, improving the wrapping effect on the anti-dry-burn probe 200. Simultaneously, it avoids excessive local stress and reduces damage to both components during assembly.

[0037] The minimum outer diameter of the second limiting sleeve 400 is greater than the minimum aperture of the third channel 130, ensuring the wrapping effect on the anti-dry-burning probe 200.

[0038] In other embodiments, a plurality of second guide protrusions are provided on the outer side wall of the second limiting sleeve 400, and the plurality of second guide protrusions are arranged sequentially along the circumference of the second limiting sleeve 400 to form a conical structure; in this embodiment, the side wall of the third channel 130 is provided with a vertically arranged guide groove, and the second guide protrusions pass through the guide groove.

[0039] In some embodiments, the second limiting sleeve 400 has a plurality of deformation grooves 410 communicating with the internal channel 401. The deformation grooves 410 penetrate the upper end face of the second limiting sleeve 400, and a clamping flap 420 is formed between two adjacent deformation grooves 410. During the upward movement of the second limiting sleeve 400, the adjacent clamping flaps 420 move closer to each other to clamp the anti-dry-burning probe 200. With the above configuration, the clamping flaps 420 can more easily deform inward, thereby completing the clamping of the anti-dry-burning probe 200. Moreover, the synchronous contraction of the plurality of clamping flaps 420 ensures the uniformity of the force on the anti-dry-burning probe 200 and the coaxiality of the anti-dry-burning probe 200 and the central hole. The clamping flaps 420 have radial elastic contraction capability.

[0040] In some embodiments, one of the upper end face of the clamping flap 420 and the lower end face of the first limiting sleeve 300 is provided with a positioning protrusion 421, and the other is provided with a positioning groove 311, with the positioning protrusion 421 inserted into the positioning groove 311. This arrangement allows the first limiting sleeve 300 and the second limiting sleeve 400 to be circumferentially locked. During the locking process, when the second limiting sleeve 400 rotates around its own axis, it drives the first limiting sleeve 300 to rotate synchronously, preventing relative rotation between the first limiting sleeve 300 and the anti-dry-burn probe 200 that could cause damage.

[0041] Specifically, each clamping petal 420 has a positioning protrusion 421 on its upper end face, and the first limiting sleeve 300 has several positioning grooves 311 on its lower end face. Each positioning protrusion 421 and each positioning groove 311 corresponds and engages with the other. This arrangement ensures that the first limiting sleeve 300 and the second limiting sleeve 400 are subjected to balanced forces, preventing jamming during the rotation of the first limiting sleeve 300 and improving its smoothness of rotation.

[0042] To avoid interference between the sidewalls of the positioning protrusion 421 and the positioning groove 311 during the retraction of the clamping flap 420, in some embodiments, the radial dimension of the positioning groove 311 is at least larger than the radial dimension of the positioning protrusion 421 within the first limiting sleeve 300. This dimensional constraint ensures that during the inward retraction of the clamping flap 420, the positioning protrusion 421 moves radially within the positioning groove 311 along the first limiting sleeve 300, preventing interference. Specifically, there is a gap between the top of the positioning protrusion 421 and the bottom of the positioning groove 311, and the top of the clamping flap 420 abuts against the lower end of the first limiting sleeve 300 at a position outside the positioning protrusion 421 to transmit axial force. In other embodiments, the positioning protrusion 421 and the bottom of the positioning groove 311 abut against each other.

[0043] For example, the positioning protrusion 421 is frustoconical, and the diameter of the positioning protrusion 421 gradually increases in the direction away from the positioning groove 311. The above arrangement makes it easy for the positioning protrusion 421 to be inserted into the positioning groove 311, and avoids interference between the positioning protrusion 421 and the sidewall of the positioning groove 311 during the contraction process of the clamping flap 420.

[0044] In other embodiments, the positioning protrusion 421 is a cylindrical structure, the positioning groove 311 is a circular groove, and the diameter of the positioning protrusion 421 is smaller than the aperture of the positioning groove 311.

[0045] In other embodiments, the positioning protrusion 421 is cylindrical, the positioning groove 311 is elongated and extends radially along the first limiting sleeve 300.

[0046] Regarding the structure of the limiting member 500, in some embodiments, the limiting member 500 has an internal clearance channel 510, through which the anti-dry-burning probe 200 passes. The outer periphery of the limiting member 500 is threaded, and the fourth channel 140 is a threaded hole, with the limiting member 500 threadedly engaging with the fourth channel 140. This arrangement allows the entire lower end face of the second limiting sleeve 400 to abut, helping to ensure uniform force distribution on the second limiting sleeve 400 and preventing jamming during its upward movement.

[0047] Specifically, the limiting member 500 includes a limiting body 520 and a limiting boss 530 connected to each other. The outer periphery of the limiting body 520 is threaded and threadedly engages with the fourth channel 140. The limiting boss 530 is used to engage with a wrench. This configuration facilitates the threaded engagement of the limiting member 500 with the burner head 100, improving assembly efficiency. For example, the radial cross-section of the limiting boss 530 has a hexagonal outer contour.

[0048] In some embodiments, the first limiting sleeve 300 includes a limiting cylinder 310 and a plurality of limiting protrusions 320 evenly distributed on the outer periphery of the limiting cylinder 310. The limiting protrusions 320 abut against the sidewall of the second channel 120. This configuration reduces the material used in the first limiting sleeve 300, lowering costs. Furthermore, compared to the outer periphery of the first limiting sleeve 300, the limiting protrusions 320 result in a smaller contact area between the first limiting sleeve 300 and the sidewall of the central hole, effectively preventing jamming problems caused by clearanceless fit. The limiting protrusions 320 are elongated strips extending axially along the central hole.

[0049] It should be noted that the materials of the first limiting sleeve 300 and the burner head 100 can be the same or different. When the materials are different, their coefficients of expansion after heating are different, which can easily cause jamming and make subsequent disassembly difficult.

[0050] In other embodiments, a limiting groove is also formed on the side wall of the central hole, and a limiting protrusion 320 is inserted into the limiting groove and abuts against the bottom of the limiting groove. The setting of the limiting groove can also effectively prevent the first limiting sleeve 300 from rotating, thereby limiting the rotation of the second limiting sleeve 400, so that the anti-dry burning probe 200 will only move along the axis of the central hole during the installation process and will not rotate around the axis of the central hole.

[0051] Among them, there is a radial floating gap between the first limiting sleeve 300 and the rod of the anti-dry burning probe 200 to eliminate radial jamming caused by initial misalignment.

[0052] In some embodiments, the gas stove further includes an elastic gasket 600, which is sleeved on the anti-dry-burning probe 200 and sandwiched between the stepped surface 111 between the first channel 110 and the second channel 120 and the first limiting sleeve 300, or between the first limiting sleeve 300 and the second limiting sleeve 400, or between the second limiting sleeve 400 and the limiting member 500. The elastic gasket 600 ensures that the first limiting sleeve 300 and the second limiting sleeve 400 are always subjected to an elastic force along the axial direction of the central hole, preventing shaking and ensuring the assembly stability of the anti-dry-burning probe 200. The elastic gasket 600 is a disc spring or a wave spring. During assembly, the elastic gasket 600 is gradually compressed during the locking process.

[0053] In some embodiments, the elastic gasket 600 is an annular wave spring, sandwiched between the first limiting sleeve 300 and the second limiting sleeve 400. The inner or outer ring of the elastic gasket 600 has teeth that mate with the positioning protrusion 421, providing axial elastic cushioning while transmitting circumferential torque. During assembly, the compression stroke of the elastic gasket 600 provides a perceptible change in locking feel, transitioning from a light elastic compression phase to a rigid conical wedge-tightening phase, allowing the operator to judge the assembly progress by feel. Furthermore, the compression margin of the elastic gasket 600 absorbs differences in axial thermal expansion among the components. The axial deformation groove 410 at the upper end of the second limiting sleeve 400 allows each clamping flap 420 to expand independently by a small amount. The outer conical surface of the second limiting sleeve 400 remains in contact with the sidewall of the third channel 130 under axial force, preventing loosening due to thermal expansion.

[0054] In some embodiments, the first limiting sleeve 300 is made of metal. The second limiting sleeve 400 is also made of metal. The metal material can be stainless steel. In other embodiments, the second limiting sleeve 400 can be made of rubber. Since the second limiting sleeve 400 is far from the flame, rubber is easier to deform to hold the anti-dry-burn probe 200 tightly.

[0055] The gas stove also includes a burner 700, which is installed on the burner head 100.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A gas stove, characterized in that, include: A burner head (100) has a central hole, which includes a first channel (110), a second channel (120), a third channel (130) and a fourth channel (140) that are connected from top to bottom and whose diameters increase sequentially. An anti-dry-burning probe (200) is inserted into the central hole; The first limiting sleeve (300) is sleeved on the anti-dry burning probe (200) and passes through the second channel (120), and is axially fixed to the burner head (100) in the center hole; The second limiting sleeve (400) is sleeved on the anti-dry-burn probe (200) and passes through the third channel (130). The upper end of the second limiting sleeve (400) abuts against the lower end of the first limiting sleeve (300). The second limiting sleeve (400) is configured to cooperate with the side wall of the third channel (130) during upward movement so that the outer diameter of the upper end of the second limiting sleeve (400) contracts and drives the upper end of the internal channel (401) of the second limiting sleeve (400) to close tightly to the anti-dry-burn probe (200). A limiting member (500) is connected to the furnace head (100) and abuts against the lower end face of the second limiting sleeve (400).

2. The gas stove according to claim 1, characterized in that, At least a portion of the third channel (130) is a diameter gradient portion, and the second limiting sleeve (400) is configured to cooperate with the diameter gradient portion during upward movement to cause the upper outer diameter of the second limiting sleeve (400) to contract.

3. The gas stove according to claim 2, characterized in that, At least a portion of the second limiting sleeve (400) is a frustum conical structure, which cooperates with the diameter gradient portion to reduce the outer diameter of the upper end of the second limiting sleeve (400).

4. The gas stove according to claim 1, characterized in that, The second limiting sleeve (400) has a plurality of deformation grooves (410) that are connected to the internal channel (401). The deformation grooves (410) penetrate the upper end face of the second limiting sleeve (400). A clamping petal (420) is formed between two adjacent deformation grooves (410). During the upward movement of the second limiting sleeve (400), the adjacent clamping petals (420) move closer to each other to clamp the anti-dry burning probe (200).

5. The gas stove according to claim 4, characterized in that, One of the upper end face of the clamping petal (420) and the lower end face of the first limiting sleeve (300) is provided with a positioning protrusion (421), and the other is provided with a positioning groove (311). The positioning protrusion (421) is inserted into the positioning groove (311).

6. The gas stove according to claim 5, characterized in that, Each of the clamping petals (420) has a positioning protrusion (421) on its upper end surface, and the first limiting sleeve (300) has a plurality of positioning grooves (311) on its lower end surface. Each positioning protrusion (421) and each positioning groove (311) are matched in a one-to-one correspondence.

7. The gas stove according to claim 5, characterized in that, The positioning groove (311) is at least larger in the radial dimension than the positioning protrusion (421) of the first limiting sleeve (300).

8. The gas stove according to claim 5, characterized in that, The positioning protrusion (421) is frustoconical, and the diameter of the positioning protrusion (421) gradually increases in the direction away from the positioning groove (311).

9. The gas stove according to any one of claims 1-8, characterized in that, The limiting member (500) has an internal clearance channel (510), the anti-dry burning probe (200) passes through the clearance channel (510), the limiting member (500) has a thread on its outer periphery, the fourth channel (140) is a threaded hole, and the limiting member (500) is threadedly engaged with the fourth channel (140).

10. The gas stove according to claim 9, characterized in that, The limiting member (500) includes a limiting body (520) and a limiting boss (530) connected to each other. The outer periphery of the limiting body (520) is threaded and threadedly engaged with the fourth channel (140). The limiting boss (530) is used to engage with a wrench.

11. The gas stove according to any one of claims 1-8, characterized in that, The first limiting sleeve (300) includes a limiting cylinder (310) and a plurality of limiting protrusions (320) evenly distributed on the outer periphery of the limiting cylinder (310), wherein the limiting protrusions (320) abut against the side wall of the second channel (120).

12. The gas stove according to any one of claims 1-8, characterized in that, The gas stove also includes an elastic gasket (600), which is sleeved on the anti-dry-burning probe (200) and sandwiched between the stepped surface (111) between the first channel (110) and the second channel (120) and the first limiting sleeve (300), or sandwiched between the first limiting sleeve (300) and the second limiting sleeve (400), or sandwiched between the second limiting sleeve (400) and the limiting member (500).

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