Anti-dry-burning probe and burner comprising same
By employing a heat insulation cover and a non-contact temperature measuring section in the anti-dry-burn probe, the problem of misjudgment caused by heat accumulation and temperature field drift in the existing technology is solved, thus achieving higher temperature measurement accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-10
AI Technical Summary
The existing heat insulation structure of the anti-dry-burn probe is prone to causing a sharp rise in the temperature of the temperature measuring part and misjudgment. In addition, the movement of the burning flame affects the temperature field and increases the misjudgment rate.
The heat insulation cover is designed to be non-contact with the temperature measuring unit, forming a vertically connected heat dissipation channel. The heat is introduced through the lower opening and dissipated through the vertically connected heat dissipation channel. The temperature field drift is prevented by the liftable design of the heat insulation cover.
It effectively prevents heat buildup, reduces the chance of the temperature measuring unit misjudging dry burning, avoids temperature field drift, and improves temperature measurement accuracy.
Smart Images
Figure CN223985167U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-dry-burning probe technology, and in particular to an anti-dry-burning probe and a burner containing the same. Background Technology
[0002] Currently, the heat insulation structure of anti-dry-burning probes is integrated with the temperature sensing unit (NTC) through mechanical interference fit, forming a single cavity structure with a closed upper end and an open lower end. The NTC is located on top of this closed cavity. In existing anti-dry-burning probes with a closed upper end and an open lower end, when used with high-load burners (>4.5kW), the heat generated by combustion enters the cavity through the open lower end. Because the upper end of the cavity is closed, heat convection is blocked, causing a rapid increase in heat within the cavity. This leads to a sharp rise in the temperature of the resulting metal outer shell of the cavity, which in turn causes a sharp rise in the temperature of the NTC, increasing the probability of misjudgment. Furthermore, the existing NTC is placed on top of a closed cavity, placing the heat collection plate directly in the high-temperature combustion field. When wind passes around the combustion area, it causes the flame to drift, resulting in a temperature field shift and affecting the temperature of the NTC, further increasing the probability of misjudgment. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the defect that the heat insulation structure in the prior art is an integrated cavity structure with the temperature measuring unit, which is prone to misjudgment of dry burning, and to provide a dry burning prevention probe and a burner containing it.
[0004] The present invention solves the above-mentioned technical problems through the following technical solution:
[0005] An anti-dry-burning probe includes a temperature measuring part, one end of which is connected to the bottom box of a stove and the other end is inserted into the burner. The anti-dry-burning probe includes a heat insulation cover that is disposed in non-contact with the temperature measuring part. The heat insulation cover is arranged around the outer periphery of the temperature measuring part and forms a vertically penetrating heat dissipation channel with the temperature measuring part. The upper end of the heat insulation cover is movable relative to the temperature measuring part, and the lower end of the heat insulation cover is used to connect to the burner. The lower opening of the heat dissipation channel is disposed away from the detection end of the temperature measuring part.
[0006] In this design, by non-contactly integrating the heat insulation cover and the temperature measuring unit, a vertically connected heat dissipation channel is formed. Compared to a closed-off integrated cavity, the heat generated by combustion enters through the lower opening and dissipates through the vertically connected channel, preventing heat accumulation and a rapid increase in temperature within the cavity. Simultaneously, cold outside air entering the heat dissipation channel is heated and expanded by the high-temperature field outside the heat insulation cover, creating an upward airflow. This airflow cools the temperature measuring unit, preventing additional heat transfer and reducing the likelihood of false dry-burning detection. Furthermore, the upper part of the heat insulation cover is adjustable relative to the temperature measuring unit to effectively seal its outer perimeter, preventing temperature field drift caused by flame movement and thus reducing the chance of false dry-burning detection.
[0007] Preferably, the heat insulation cover includes a base at the lower end and a cover body at the upper end. One end of the base is connected to the burner, and the other end of the base is movably connected to the cover body via an elastic component. The temperature measuring part passes through the base and the cover body and is spaced apart from the base and the cover body.
[0008] In this solution, the above-mentioned settings enable non-contact installation between the heat insulation cover and the temperature measuring unit, and the upper part of the heat insulation cover can be raised and lowered independently without transferring heat to the temperature measuring unit.
[0009] Preferably, the base has a plurality of heat dissipation holes, which are arranged in a ring around the base and are all connected to the heat dissipation channel. The heat dissipation holes are located near the lower opening of the heat dissipation channel.
[0010] In this solution, the above-mentioned settings are used to add heat dissipation holes to increase air intake and facilitate heat dissipation, based on the opening on the lower side of the heat dissipation channel.
[0011] Preferably, the base is further provided with a liquid collection tray, which is arranged around the outer periphery of the base, and the opening of the liquid collection tray faces the detection end of the temperature measuring unit.
[0012] In this solution, the above-mentioned design is used to accommodate spilled liquid from the cookware. Furthermore, based on the non-contact design between the heat insulation cover and the temperature measuring unit, the heat insulation cover can be removed separately, making cleaning more convenient.
[0013] Preferably, the heat dissipation hole extends into the liquid-holding tray, and the heat dissipation hole communicates with the liquid-holding tray.
[0014] In this solution, the above-mentioned settings ensure that the overflow from the cookware can be discharged through the heat dissipation holes after entering the liquid collection tray, thus preventing the liquid collection tray from accumulating and clogging the outer periphery of the heat insulation cover.
[0015] Preferably, the cover has a receiving cavity, the elastic component includes a spring and a spring pad, the spring pad is riveted to the end of the base away from the burner, one end of the spring is connected to the spring pad, and the other end of the spring extends into the receiving cavity.
[0016] In this solution, the above-mentioned settings are used to achieve the lifting and lowering of the cover relative to the temperature measuring unit.
[0017] Preferably, the cover is also provided with a guide rail, which is arranged along the height direction of the anti-dry burning probe. The spring pad is provided with a protrusion corresponding to the guide rail, which extends into the guide rail. There are multiple guide rails and protrusions.
[0018] In this solution, the above-mentioned settings are used to guide the movement of the cover body by means of the protrusions and guide rails, so as to avoid the height direction deviation of the cover body's self-protection against dry burning probe.
[0019] Preferably, along the height direction of the anti-dry-burning probe, the height of the temperature measuring part is higher than the height of the heat insulation cover.
[0020] In this solution, the above settings ensure that when the anti-dry-burning probe is in use, the cookware first contacts the temperature measuring part and then the heat insulation cover, thus avoiding the situation where the cookware cannot measure the temperature because it does not contact the temperature measuring part.
[0021] Preferably, the height difference between the temperature measuring part and the heat insulation cover is 0.3-1mm.
[0022] In this solution, the above settings ensure that the cookware comes into contact with the temperature measuring unit first.
[0023] A burner comprising an anti-dry-burning probe as described above.
[0024] In this solution, the burner includes the aforementioned anti-dry-burning probe. By forming a heat dissipation channel that runs vertically through the burner, the problem of heat accumulation under heavy load conditions causing the anti-dry-burning probe to misjudge is overcome. At the same time, it can overcome the problem of temperature field deviation causing the anti-dry-burning probe to misjudge.
[0025] The positive and progressive effects of this invention are as follows: By non-contactly configuring the heat insulation cover and the temperature measuring unit, a vertically continuous heat dissipation channel is formed. Compared to an integrated cavity with a closed top, the heat generated by combustion enters through the lower opening and exits through the vertically continuous heat dissipation channel, thus preventing heat accumulation and a rapid increase in temperature within the cavity. Simultaneously, cold outside air entering the heat dissipation channel is heated and expanded by the high-temperature field outside the heat insulation cover, forming an upward airflow. This airflow cools the temperature measuring unit, preventing additional heat transfer and reducing the likelihood of false dry-burning detection. Furthermore, the upper end of the heat insulation cover can be raised and lowered relative to the temperature measuring unit to effectively seal its outer periphery, preventing temperature field drift caused by flame movement and thus affecting the temperature of the measuring unit, further reducing the chance of false dry-burning detection. Attached Figure Description
[0026] Figure 1 This is a perspective view of a burner according to a preferred embodiment of the present invention.
[0027] Figure 2 This is a front view of a burner according to a preferred embodiment of the present invention.
[0028] Figure 3 This is a top view of a burner according to a preferred embodiment of the present invention.
[0029] Figure 4 for Figure 3 AA sectional view.
[0030] Figure 5 This is a perspective view of a preferred embodiment of the anti-dry-burning probe of this utility model.
[0031] Figure 6 This diagram shows the positional relationship between the elastic component and the base in a preferred embodiment of the present invention.
[0032] Explanation of reference numerals in the attached figures:
[0033] Anti-dry burning probe 100
[0034] Heat shield 1
[0035] Base 11
[0036] Cover 12
[0037] Elastic component 13
[0038] Spring 131
[0039] Spring pad 132
[0040] 14 ventilation holes
[0041] Liquid collection tray 15
[0042] Temperature Measurement Section 2
[0043] Detection end 21
[0044] Heat dissipation channel 3
[0045] Lower opening 31
[0046] Upper opening 32
[0047] Burner 200 Detailed Implementation
[0048] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.
[0049] This embodiment provides a dry-burning prevention probe, the specific structure of which is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the anti-dry-burning probe 100 includes a temperature measuring part 2. One end of the temperature measuring part 2 is connected to the bottom box of the stove (not shown in the figure), and the other end is inserted into the burner 200. The anti-dry-burning probe 100 includes a heat insulation cover 1 that is disposed in non-contact with the temperature measuring part 2. The heat insulation cover 1 is arranged around the outer periphery of the temperature measuring part 2 and forms a heat dissipation channel 3 that runs vertically through the temperature measuring part 2. The upper end of the heat insulation cover 1 can be raised and lowered relative to the temperature measuring part 2. The lower end of the heat insulation cover 1 is used to connect to the burner 200. The lower opening 31 of the heat dissipation channel 3 is disposed away from the detection end 21 of the temperature measuring part 2.
[0050] Specifically, the temperature measuring part 2 has a cylindrical structure. One end of the temperature measuring part 2 is used to detect the temperature, namely the detection end 21. The detection end 21 is installed on the burner 200. The heat insulation cover 1 has a cylindrical structure and is internally connected. The temperature measuring part 2 is installed inside the heat insulation cover 1. The temperature measuring part 2 and the heat insulation cover 1 are spaced apart to form a heat dissipation channel 3 that is vertically connected. The lower opening 31 of the heat dissipation channel 3 is located away from the detection end 21 of the temperature measuring part 2. The upper opening 32 of the heat dissipation channel 3 is located close to the detection end 21. The lower opening 31 of the heat dissipation channel 3 is used to introduce air with a lower temperature outside the heat insulation cover 1 into the heat dissipation channel 3. Compared with the closed structure at the upper end of the integrated cavity near the detection end 21, the heat generated by combustion will enter the heat dissipation channel 3 through the lower opening 31 and leave the heat dissipation channel 3 through the upper opening 32 for air dissipation, avoiding heat accumulation and preventing a rapid increase in heat inside the cavity. Of course, when the upper end of the heat insulation cover 1 contacts the bottom of the pot, the cold air from the outside can enter the heat dissipation channel 3 and then flow out through the lower opening 31 for heat dissipation. In this embodiment, the temperature measuring unit 2 is a thermistor probe as used in the prior art.
[0051] At the same time, after the cold air from the outside enters the heat dissipation channel 3, it is heated by the high temperature field outside the heat insulation cover 1 and expands, thus forming an airflow from bottom to top. This airflow will cool down the temperature measuring unit 2, thereby preventing additional heat from being transferred to the temperature measuring unit 2 and reducing the chance of the temperature measuring unit 2 misjudging dry burning.
[0052] In addition, the upper end of the heat insulation cover 1 can be raised and lowered relative to the temperature measuring unit 2. The heat insulation cover 1 and the temperature measuring unit 2 are set in a non-contact manner. When in use, the bottom detection end 21 of the pot comes into contact with the temperature measuring unit 2 and the temperature measuring unit 2 rises and falls accordingly. The upper end of the heat insulation cover 1, which is connected to the burner 200, can be raised and lowered according to the shape of the bottom of the pot. Specifically, it can be raised and lowered relative to the outer periphery of the detection end 21. Compared with the synchronous movement of the heat insulation cover 1 and the temperature measuring unit 2, it can effectively seal the outer periphery of the detection end 21, prevent the flame from directly contacting the detection end 21, and prevent the temperature field from drifting due to the movement of the combustion flame, thereby affecting the temperature of the detection end 21 and reducing the probability of misjudging dry burning.
[0053] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the heat insulation cover 1 includes a base 11 at the lower end and a cover 12 at the upper end. One end of the base 11 is connected to the burner 200, and the other end of the base 11 is movably connected to the cover 12 through an elastic component 13. The temperature measuring part 2 passes through the base 11 and the cover 12 and is spaced apart from the base 11 and the cover 12.
[0054] Specifically, both the base 11 and the cover 12 are cylindrical structures with internal continuity. The cover 12 is located above the base 11, and a receiving cavity is provided at the end where the cover 12 connects to the base 11. The receiving cavity extends along the height direction of the heat insulation cover 1, and the cover 12 is inserted into the inner wall of the base 11 through the receiving cavity. In addition, an elastic component 13 is provided at the end where the base 11 connects to the cover 12. One end of the elastic component 13 extends into the receiving cavity to allow the upper end of the heat insulation cover 1 to rise and fall relative to the detection end 21, thereby effectively sealing the outer periphery of the detection end 21. At the same time, the cover 12 is reset by the elastic component 13 after rising and falling. It can be understood that the inner walls of the base 11 and the cover 12 are spaced apart from the temperature measuring part 2 to achieve a non-contact setting between the heat insulation cover 1 and the temperature measuring part 2. Based on the non-contact setting, when the heat insulation cover 1 itself is heated by the flame, it will not transfer heat to the temperature measuring part 2 through the connection between the heat insulation cover 1 and the temperature measuring part 2, so as to ensure that the temperature measuring part 2 can measure the temperature independently.
[0055] Furthermore, in this embodiment, a plurality of heat dissipation holes 14 are provided on the base 11, the plurality of heat dissipation holes 14 are arranged around the base 11, and the plurality of heat dissipation holes 14 are all connected to the heat dissipation channel 3, and the heat dissipation holes 14 are located near the lower opening 31 of the heat dissipation channel 3.
[0056] Specifically, heat dissipation holes 14 are arranged around the surface of the base 11 and penetrate the inner wall of the base 11, so that the heat dissipation holes 14 are connected to the heat dissipation channel 3 formed by the heat insulation cover 1 and the temperature measuring part 2. The heat dissipation holes 14 are rectangular holes, but in other embodiments they can also be round holes or other shapes of holes in the prior art, which will not be described in detail here. The heat dissipation holes 14 extend along the height direction of the base 11, and one end of the heat dissipation holes 14 is set close to the lower opening 31. On the one hand, when the cover 12 is raised and lowered, by setting the heat dissipation holes 14 close to the lower opening 31, the cover 12 can prevent the heat dissipation holes 14 from being closed. On the other hand, by increasing the number of heat dissipation holes 14, the airflow of outside cold air into and out of the heat dissipation channel 3 is increased, which facilitates heat dissipation.
[0057] In this embodiment, a liquid collection tray 15 is also provided on the base 11. The liquid collection tray 15 is arranged around the outer periphery of the base 11, and the opening of the liquid collection tray 15 faces the detection end 21 of the temperature measuring unit 2.
[0058] Specifically, the liquid collection tray 15 has an annular groove extending from the end of the base 11 near the lower opening 31 toward the detection end 21. The annular groove is located on the outer periphery of the base 11, and the bottom of the annular groove is connected to the end of the base 11 near the lower opening 31. The opening of the liquid collection tray 15 faces the detection end 21. In this way, when the overflow of the pot flows onto the heat insulation cover 1, the overflow of the pot is contained by the liquid collection tray 15. Furthermore, since the heat insulation cover 1 and the temperature measuring unit 2 are not in contact, the heat insulation cover 1 can be removed separately, which makes cleaning more convenient.
[0059] In this embodiment, the heat dissipation hole 14 extends into the liquid collection tray 15, and the heat dissipation hole 14 is connected to the liquid collection tray 15.
[0060] Specifically, one end of the heat dissipation hole 14 extends toward the lower opening 31 and into the liquid collection tray 15. That is, the height of the inner wall of the liquid collection tray 15 away from the outer surface of the base 11 is higher than the height of the end of the heat dissipation hole 14 toward the lower opening 31 along the height direction of the base 11. The heat dissipation hole 14 is connected to the inside of the liquid collection tray 15 so that after the pot overflows into the liquid collection tray 15, it can also flow into the heat dissipation channel 3 through the heat dissipation hole 14 and be discharged, so as to avoid the liquid collection tray 15 accumulating overflow and blocking the outer periphery of the heat insulation cover 1.
[0061] In this embodiment, the cover 12 has a receiving cavity, and the elastic component 13 includes a spring 131 and a spring pad 132. The spring pad 132 is riveted to the end of the base 11 away from the burner 200. One end of the spring 131 is connected to the spring pad 132, and the other end of the spring 131 extends into the receiving cavity.
[0062] Specifically, the receiving cavity is an annular groove, which has the same dimensions as the inner wall of the base 11. When the cover 12 is raised or lowered, the inner wall of the base 11 is inserted into the annular groove. One end of the base 11 is connected to the burner 200, and the other end is positioned away from the burner 200 and connected to the cover 12. A spring pad 132 is provided on the end of the base 11 away from the burner 200. The spring pad 132 is a ring-shaped structure as in the prior art and is riveted to the end of the base 11 away from the burner 200. At the same time, one end of the spring 131 is also connected to the spring pad 132, and the other end of the spring 131 extends into the annular groove and abuts against the bottom of the annular groove. Thus, when the cover 12 is aligned with the bottom of the pot, the cover 12 can be raised or lowered relative to the detection end 21 without the base 11 needing to move.
[0063] Furthermore, in this embodiment, a guide rail (not shown in the figure) is also provided on the cover 12. The guide rail is arranged along the height direction of the anti-dry burning probe 100. A protrusion (not shown in the figure) is provided on the spring pad 132 corresponding to the guide rail. The protrusion extends into the guide rail. There are multiple guide rails and protrusions.
[0064] Specifically, the height direction of the anti-dry-burning probe 100 is the same as the height direction of the base 11. A guide rail is installed on the inner wall of the cover 12. A spring pad 132 has a protrusion corresponding to the inner wall of the cover 12. The guide rail is a rectangular track, and the protrusion is also rectangular, extending radially into the guide rail. The protrusion and guide rail work together to guide the movement, preventing the cover 12 from shifting in the height direction of the anti-dry-burning probe 100 during lifting and lowering. It is understood that increasing the number of protrusions and guide rails, and spacing them apart, increases the reliability of the guidance.
[0065] In this embodiment, along the height direction of the anti-dry-burning probe 100, the height of the temperature measuring part 2 is higher than the height of the heat insulation cover 1.
[0066] Specifically, along the height direction of the anti-dry-burning probe 100, the height of the temperature measuring part 2 is the height of the end of the temperature measuring part 2 away from the burner 200, that is, the height of the detection end 21. The height of the heat insulation cover 1 is the height of the end of the heat insulation cover 1 away from the burner 200, that is, the height of the cover 12. The height of the detection end 21 is higher than the height of the cover 12, so as to ensure that when the anti-dry-burning probe 100 is in use, the pot first contacts the temperature measuring part 2 and then contacts the heat insulation cover 1, avoiding the situation where the pot cannot be measured because it does not contact the temperature measuring part 2.
[0067] Furthermore, in this embodiment, the height difference between the temperature measuring unit 2 and the heat insulation cover 1 is 0.3-1mm. By limiting the height difference between the two, it is ensured that the pot can contact the temperature measuring unit 2 first, while avoiding the situation where the temperature measuring unit 2 is too high and comes into direct contact with the flame.
[0068] This embodiment also provides a burner 200, which includes the aforementioned anti-dry-burning probe 100. The burner 200 is non-contactly connected to the temperature measuring part 2 through the heat insulation cover 1, forming a vertically penetrating heat dissipation channel 3. This overcomes the problem that the anti-dry-burning probe 100 is prone to misjudgment due to heat accumulation under high load conditions, specifically when the heat load is ≥4.5Kw. At the same time, it can overcome the problem that the anti-dry-burning probe 100 is prone to misjudgment due to temperature field deviation.
[0069] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.
Claims
1. A dry-burn preventing probe comprising a temperature measuring portion, one end of which is connected to a hob base and the other end of which is provided through a burner, characterized in that, The dry-burning prevention probe comprises a heat shield arranged non-contacting with the temperature measuring part, the heat shield is annularly arranged at the outer circumferential side of the temperature measuring part, and a heat dissipation channel is formed between the heat shield and the temperature measuring part, the upper end of the heat shield is liftable relative to the temperature measuring part, the lower end of the heat shield is used for connecting the burner, and the lower side opening of the heat dissipation channel is arranged away from the detection end of the temperature measuring part.
2. The dry-burn prevention probe of claim 1, wherein, The heat shield comprises a base at the lower end and a cover at the upper end, one end of the base is connected with the burner, the other end of the base is movably connected with the cover through an elastic assembly, and the temperature measuring part is arranged in the base and the cover and is spaced apart from the base and the cover.
3. The dry-burn prevention probe of claim 2, wherein, A plurality of heat dissipation holes are arranged on the base, the heat dissipation holes are annularly arranged on the base, and the heat dissipation holes are in communication with the heat dissipation channel.
4. The dry-burn prevention probe of claim 3, wherein, A liquid containing disc is further arranged on the base, the liquid containing disc is annularly arranged at the outer circumferential side of the base, and the opening of the liquid containing disc faces the detection end of the temperature measuring part.
5. The dry-burn prevention probe of claim 4, wherein, The heat dissipation holes partially extend into the liquid containing disc, and the heat dissipation holes are in communication with the liquid containing disc.
6. The dry-burn prevention probe of claim 2, wherein, The cover has a containing cavity, the elastic assembly comprises a spring and a spring pad, the spring pad is riveted to the end of the base away from the burner, one end of the spring is connected with the spring pad, and the other end of the spring extends into the containing cavity.
7. The dry-burn prevention probe of claim 6, wherein, A guide rail is further arranged on the cover, the guide rail is arranged along the height direction of the dry-burning prevention probe, a protrusion is arranged on the spring pad corresponding to the guide rail, the protrusion extends into the guide rail, and the guide rail and the protrusion are provided with a plurality of protrusions.
8. The dry-burn prevention probe of claim 1, wherein, The height of the temperature measuring part is higher than the height of the heat shield along the height direction of the dry-burning prevention probe.
9. The anti-burnout probe of claim 8, wherein, The height difference between the temperature measuring part and the heat shield is 0.3-1 mm.
10. A burner characterized by, The burner comprises the dry-burning prevention probe according to any one of claims 1-9.