Temperature detection device and method for heating element

Abstract

The invention belongs to the technical field of heating smoking sets, and particularly relates to a temperature detection device and method for a heating element. The device comprises a base, a clamp, an elastic probe clamp, a driving mechanism, a gap adjusting mechanism and a temperature measuring system. The elastic probe clamp is composed of a pair of probe arms and a connecting part, and the driving mechanism drives the elastic probe clamp to move axially; the gap adjusting mechanism comprises a restraining part, and a conical cavity of the restraining part interacts with the middle matching part of the probe arm to control radial opening and closing of the front-end working part, so that clamping and releasing of the heating element are achieved; and the temperature measuring system measures the temperature of the measuring part at the rear end of the probe arm through an infrared temperature measuring device. Separable contact temperature measurement is adopted, element damage is avoided, the problem of low-emissivity surface measurement is solved by indirectly measuring the rear end of the probe arm with high emissivity, temperature uniformity judgment and data mutual inspection are achieved through the double-probe design, the consistency and repeatability of operation are ensured through a mechanical positioning system, and the measurement accuracy is improved. And the temperature measurement precision and reliability are obviously improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heating smoking set, and particularly relates to a temperature detection device and method for a heating element. BACKGROUND

[0002] In the research and development and production quality inspection process of the heating smoking set, accurate measurement of the working temperature of the heating element has always been a key technical link in the field. Obtaining the complete temperature change curve of the heating element under the simulated smoking working condition has important value for evaluating the thermodynamic performance, optimizing the temperature control logic and ensuring the product consistency. However, the field has been facing a long-standing technical problem in realizing this technical goal.

[0003] At present, in the research and development verification stage requiring direct temperature measurement, several technical solutions mainly used all have obvious limitations. First, the contact type temperature measurement method, of which the typical representative is to use a thermocouple sensor for measurement. In order to ensure the measurement stability, the thermocouple measurement end usually needs to be permanently fixed on the surface of the heating element through micro-point welding or high-temperature bonding process. This installation method not only causes irreversible damage to the structurally precise heating element, but more importantly, it introduces significant measurement system error. Specifically, the thermocouple metal material itself has inherent heat capacity characteristics, and the combination interface between the measurement end and the measured element forms an additional contact thermal resistance. The thermocouple measurement system will produce obvious thermal interference effect in the working process: it not only continuously absorbs the heat energy generated by the heating element, but also hinders the normal conduction path of the heat, thereby causing the measured temperature curve to be distorted in amplitude accuracy and phase characteristics, and unable to accurately reflect the true thermal performance of the heating element in the independent working state.

[0004] In order to overcome the interference and destructive problems of the contact type measurement, the industry attempts to use the non-contact infrared temperature measurement scheme. However, this method faces double technical obstacles in actual application: first, the low emissivity characteristics of the surface of the heating element cause the infrared radiation signal to have too low signal-to-noise ratio, and it is easily disturbed by the environmental background radiation, causing systematic deviation of the temperature measurement data; second, the highly integrated internal structure of the smoking set makes the physical space available for the temperature measurement equipment extremely limited, making it difficult for the infrared optical system to obtain sufficient field of view angle and working distance, which seriously restricts the feasibility of the measurement.

[0005] In addition, the prior art also includes a method of inferring temperature by monitoring the temperature coefficient of resistance of the heating element. However, this method can only obtain the overall average temperature of the element in essence, has the inherent defect of insufficient spatial resolution, cannot identify local temperature abnormal areas, and its measurement accuracy is highly dependent on the accuracy of the initial calibration, so that any small change in the contact resistance will introduce difficult-to-quantify measurement error, thus being difficult to meet the reliability requirements of industrialized quality inspection.

[0006] To solve the above problems, the present application is proposed. SUMMARY

[0007] In order to solve the problems of heat interference, poor measurement stability and difficulty in narrow space in the prior art, the present application provides a temperature detection device and method. The device uses a pair of independent probe arms as a detachable contact medium, allowing each probe to contact different parts of the heating element. The cone surface of the constraint part and the middle part of the probe arm cooperate to form a controllable heat conduction path from the heating element to the rear end measurement part.

[0008] The independent contact and heat conduction of the two probes achieve local temperature measurement of specific positions of the heating element. By controlling the contact state of the constraint part and the probe arm, the heat contact quality and heat flow stability are adjusted, so that stable and repeatable temperature measurement data are obtained without damaging the heating element. Meanwhile, the slender characteristics of the probe structure allow it to extend into the narrow space inside the smoking set, and the measurement of the probe arm rear end with known emissivity overcomes the measurement difficulty caused by the low emissivity of the heating element surface.

[0009] The present application is realized by the following technical solutions:

[0010] The first aspect of the present application provides a temperature detection device for a heating element, comprising: a base 1;

[0011] A clamp 2 is arranged on the base 1 for fixing a heating smoking set 01 to be measured;

[0012] An elastic probe clamp 3 is composed of a pair of probe arms 31 and a connecting part 32 connecting the tail parts of the two arms;

[0013] A driving mechanism 4 is fixedly connected to the connecting part 32 of the elastic probe clamp 3, and is used to provide driving force for the axial movement of the elastic probe clamp 3. Preferably, the driving mechanism 4 can adopt an electric push rod;

[0014] A gap adjusting mechanism is slidingly connected to the base 1, which includes a constraint part 51, and the pair of probe arms 31 penetrates through the constraint part 51;

[0015] A temperature measurement system is used to non-contact measure the temperature of the rear end measurement part of the pair of probe arms 31;

[0016] The driving mechanism 4 drives the axial movement of the elastic probe clamp 3, and by changing the relative position of the probe arm 31 and the constraint part 51, the radial opening and closing action of the front end working part of the probe arm 31 is realized, so as to clamp or release the heating element 02 in the heating smoking set.

[0017] The probe arm 31 is made of a metal material with both high elasticity and high thermal conductivity, preferably beryllium copper alloy or phosphor bronze, with an elastic modulus ranging from 100 to 130 GPa and a thermal conductivity of not less than 80 W / (m·K). These material properties ensure the structural stability and efficient thermal conduction performance of the probe during repeated opening and closing.

[0018] Preferably, the connecting part 32 is made of polyetheretherketone (PEEK). Due to the extremely low thermal conductivity of the connecting part 32, effective thermal isolation is established between the two probe arms 31 while ensuring reliable mechanical connection. This ensures that the temperature of the measuring part at the rear end of each probe arm can independently reflect the local temperature contacted by its front end, which is crucial for achieving dual-point independent temperature measurement.

[0019] The constraint part 51 is made of a heat-insulating and wear-resistant material, preferably polyetheretherketone (PEEK) or zirconia ceramic, with a thermal conductivity of not more than 0.5 W / (m·K). This material selection ensures both thermal insulation and wear resistance during long-term sliding contact with the probe arm.

[0020] Preferably, the probe arm 31 is divided along its axial direction into a front working part for contacting the heating element, a middle mating part for interacting with the constraint part 51, and a rear measuring part for temperature measurement.

[0021] The constraint part 51 is provided with a conical cavity, and the middle mating part of the probe arm 31 passes through the conical cavity, so that the constraint part 51 can control the radial opening and closing of the front working part through the interaction with the middle mating part.

[0022] Preferably, the driving axis of the driving mechanism 4, the telescopic axis of the elastic probe clamp 3, the constraint axis of the gap adjustment mechanism, and the positioning axis of the clamp 2 are collinear.

[0023] Preferably, the temperature measurement system includes two thermally insulated measurement chambers 6 that are thermally isolated from each other, and the rear measuring portions of the two probe arms 31 are respectively housed in the corresponding thermally insulated measurement chambers 6;

[0024] The thermal insulation measuring chamber 6 is provided with a front guide hole and a rear guide hole at its front and rear ends, respectively. The probe arm 31 passes through the front and rear guide holes, so that the front working part is located outside the thermal insulation measuring chamber 6.

[0025] The front guide hole and the rear guide hole are configured to allow the probe arm 31 to perform radial oscillation caused by the opening and closing action of the front end while moving axially.

[0026] The insulated measurement chamber 6 adopts a composite thermal insulation structure, which includes a structural support layer, a core thermal insulation layer and an internal heat reflective layer from the outside to the inside.

[0027] The structural support layer is a metal shell, such as stainless steel or aluminum alloy with a thickness ranging from 0.5 mm to 1.5 mm, which mainly serves as mechanical support and protection.

[0028] The core thermal insulation layer is filled inside the structural support layer and is made of a low thermal conductivity material, preferably microporous silica aerogel or ceramic fiber, with a typical thermal conductivity of less than 0.03 W / (m·K), to block axial heat conduction.

[0029] The internal heat-reflective layer is a highly reflective film attached to the inner surface of the core heat insulation layer, such as a polished aluminum foil or a vacuum-deposited metal film with a thickness of less than 0.1 mm. Its main function is to reflect the heat radiated by the probe arm 31 back to significantly reduce radiative heat loss.

[0030] This composite structure provides a highly stable local thermal environment for the measurement section at the rear end of the probe arm 31 by synergistically suppressing heat conduction and heat radiation.

[0031] Preferably, the temperature measurement system further includes an infrared temperature measuring device 7; an infrared observation window 61 is provided on the wall of the insulated measurement chamber 6; the detection end of the infrared temperature measuring device 7 faces the infrared observation window 61, and is used to non-contactly measure the temperature of the rear measuring section of the probe arm 31 through the observation window. The infrared temperature measuring device 7 is an infrared radiation detector capable of measuring wavelengths that match the expected temperature range of the rear measuring section of the probe arm 31. Given that the operating temperature of the heating element is typically around 300°C, its radiation peak wavelength is located in the mid-infrared range. Therefore, the operating band of the infrared temperature measuring device 7 is preferably between 3μm and 5μm to accommodate the optimal measurement signal-to-noise ratio at this temperature. The infrared temperature measuring device 7 is configured to measure the infrared energy radiated from the surface of the rear measuring section of the probe arm 31 and convert it into a corresponding temperature reading.

[0032] Meanwhile, the material of the infrared observation window 61 should also be compatible with this band, preferably zinc selenide (ZnSe) or sapphire (Al2O3) crystals with high transmittance in this band.

[0033] Preferably, the gap adjustment mechanism further includes a mounting base 52;

[0034] The constraint part 51 is fixed to the mounting base 52;

[0035] The mounting base 52 is slidably connected to the base 1;

[0036] The constraint part 51 is configured to have two working positions:

[0037] In the first working position, the conical cavity of the constraint part 51 is disengaged from the middle mating part of the probe arm 31 or there is a radial gap. At this time, the front working part remains open under its own elasticity and can be inserted into both sides of the heating element without contact.

[0038] In the second working position, by sliding the mounting base 52, the inner wall of the conical cavity of the constraint part 51 slides into contact with the outer surface of the conical mating part of the probe arm 31 and applies radial pressure, forcing the front working part to produce a clamping action.

[0039] Preferably, the mounting base 52 is connected to the base 1 via a sliding guide assembly. The sliding guide assembly includes a guide rail 53 fixedly mounted on the base 1 and a slider 54 correspondingly mounted on the bottom of the mounting base 52 and cooperating with the guide rail 53.

[0040] Preferably, the mounting base 52 is fixed in position on the guide rail 53 by a positioning and locking assembly;

[0041] The positioning and locking assembly includes: an elongated groove 56 disposed on the base 1, the extending direction of the elongated groove 56 being parallel to the guide rail 53; a threaded hole disposed on the mounting base 52; and a positioning and locking member 55; the positioning and locking member 55 is preferably a screw or a handle screw;

[0042] The positioning locking member 55 passes through the elongated groove 56 in sequence and is threadedly engaged with the threaded hole; when the positioning locking member 55 is tightened, the clamping force generated therefrom presses the mounting base 52 and the machine base 1 together and fixes them, thereby locking the mounting base 52 in the required working position.

[0043] Preferably, the probe arm 31 is provided with a first position mark and a second position mark along its axial direction; the constraint part 51 or the mounting base 52 is provided with a reference mark that cooperates with the first and second position marks;

[0044] The first position identifier, the second position identifier, and the reference identifier are configured to indicate the first working position and the second working position.

[0045] Specifically, the first and second position markers are scale lines formed on the surface of the probe arm 31 by machining or laser marking. The reference marker is preferably the end face edge of the constraint portion 51 near the drive mechanism 4. The first working position is determined by visually aligning the first position marker with the end face edge of the constraint portion 51; the second working position is determined by visually aligning the second position marker with the same end face edge.

[0046] A second aspect of the present invention provides a method for detection using the apparatus described in the first aspect, comprising the following sequential steps:

[0047] Step (1): Fix the heating device onto the clamp 2; move the gap adjustment mechanism so that the constraint part 51 is positioned close to the end face of the device to a preset initial position;

[0048] Step (2): Start the drive mechanism 4 to drive the elastic probe clip 3 to move axially in the direction of the smoking device; by observing the relative positional relationship between the first position mark on the probe arm 31 and the reference mark on the constraint part 51, when the two reach the first predetermined relative position, stop the drive mechanism 4;

[0049] At this time, the device is in the first working position, and the working part of the front end of the probe arm 31 is kept open in the conical cavity of the constraint part 51 and is inserted through both sides of the heating element without contact.

[0050] Step (3): Keep the elastic probe clamp 3 axially stationary and move the gap adjustment mechanism; by observing the relative positional relationship between the second position mark on the probe arm 31 and the reference mark on the constraint part 51, when the two reach the second predetermined relative position, stop moving the gap adjustment mechanism;

[0051] At this time, the device is in the second working position, and the inner wall of the conical cavity of the constraint part 51 contacts the middle mating part of the probe arm 31 and applies radial pressure, forcing the front working part to clamp the heating element;

[0052] The temperature of the measuring part at the rear end of the probe arm 31 is measured non-contactly by the temperature measuring system; Step 4: Move the gap adjustment mechanism back to near the initial position, so that the front working part opens to release the heating element;

[0053] Subsequently, the drive mechanism 4 drives the elastic probe clamp 3 to retract axially.

[0054] The invention has the following beneficial effects:

[0055] 1. This invention creatively employs a detachable elastic probe clip as the heat transfer medium. Its front working part only clamps the heating element during measurement and releases it afterward, fundamentally avoiding the element damage caused by the permanent fixing required by traditional thermocouples. Simultaneously, a stable heat conduction path is established through the probe arm made of a high thermal conductivity material, and combined with infrared temperature measurement from the rear insulated measurement chamber, measurement errors introduced by contact thermal resistance and thermal capacity effects are effectively eliminated, obtaining temperature data that truly reflects the working state of the heating element.

[0056] 2. This invention does not directly measure the surface of the low-emissivity heating element. Instead, it uses a probe to conduct the temperature to a back-end measuring section with a known, stable, and high emissivity for measurement. The slender probe structure allows it to easily penetrate the narrow space inside the smoking device, while the specially designed insulated measuring chamber creates an ideal measuring area with a stable thermal environment, free from external interference, for infrared temperature measurement, thus achieving high-precision temperature measurement under complex working conditions.

[0057] 3. The precise positioning system, consisting of mechanical position markers and the edge of the constraint part, along with two preset working positions of the gap adjustment mechanism, ensures that the probe insertion depth and clamping force are highly consistent in every test. This mechanical positioning and limiting method overcomes the uncertainties of manual operation, resulting in highly repeatable measurement results that fully meet the stringent requirements of industrial quality inspection.

[0058] 4. The device adopts a coaxial layout, ensuring direct force transmission and a compact structure. The probe arm is made of highly elastic material to guarantee its fatigue resistance, the constraint part is made of heat-insulating and wear-resistant material, and the sliding guide and locking components ensure long-term accuracy retention. This allows the entire device to achieve complex functions while also possessing excellent durability and reliability.

[0059] 5. This invention employs a pair of independent probe arms 31, enabling simultaneous measurement of the temperature at two different locations on the heating element 02. This design provides spatially comparable temperature information, which is impossible with single-point temperature measurement. Specifically, by comparing the real-time temperature readings of the two probes, the temperature uniformity of the heating element within the two-point region can be determined. If a significant and stable temperature difference occurs between the two points, it indicates that the heating element exhibits uneven temperature distribution, which is crucial for evaluating its thermodynamic performance and consistency.

[0060] The measurement results from the two probes can be cross-checked. Under normal operating conditions, the temperatures at the two points should exhibit a stable correlation. If the data at one point shows abnormal drift while the data at the other point remains normal, it provides operators with a basis for judging the reliability of the data, enhancing the fault tolerance of the measurement system and the confidence level of the results. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of the temperature detection device for a heating element according to the present invention, wherein the device is in the second working position;

[0062] Figure 2 for Figure 1 A magnified view of part A in the image;

[0063] Figure 3 This is a schematic diagram of the temperature detection device for a heating element according to the present invention, wherein the device is in the first working position;

[0064] Figure 4 This is a top view of the gap adjustment mechanism of the present invention mounted on the base via a positioning and locking assembly;

[0065] List of reference numerals in the attached drawings: 01; Heating fume; 02; Heating element; 1; Base; 2; Clamp; 3; Elastic probe clamp; 31; Probe arm; 32; Connecting part; 4; Drive mechanism; 51; Constraint part; 52; Mounting seat; 53; Guide rail; 54; Slider; 55; Positioning locking part; 56; Long groove; 6; Insulated measuring chamber; 61; Infrared observation window; 7; Infrared temperature measuring device. Detailed Implementation

[0066] The present invention will be further described below through specific embodiments.

[0067] Example 1

[0068] refer to Figures 1 to 4 This embodiment provides a temperature detection device for heating elements. Through a systematic structural design, this device aims to solve several technical problems existing in the prior art.

[0069] refer to Figures 1 to 4 This embodiment provides a temperature detection device for a heating element. Through a systematic structural design, this device aims to solve several technical problems existing in the prior art. The device mainly includes the following systems:

[0070] The base and fixture system constitute the basic support of the device. The base 1 provides a stable mounting reference for the entire device. Its worktable surface is equipped with a standard array of threaded holes as mounting interfaces and is machined with a precise positioning reference surface.

[0071] The drive mechanism 4, the guide rail 53 of the gap adjustment mechanism, and the clamp 2 are all fixed to the worktable surface of the base 1 by bolts. The clamp 2 adopts a mature quick clamping mechanism in the field (such as cam lever type, toggle type or pneumatic type) to realize the quick clamping and release of the heating smoke device 01.

[0072] The probe contact system is the core component for achieving accurate temperature measurement. The elastic probe clip 3 consists of a pair of probe arms 31 and a connecting part 32 connecting the tails of the two arms. The probe arms 31 are made of beryllium copper alloy or phosphor bronze, which have both high elasticity and high thermal conductivity. This material selection ensures, on the one hand, that the high elasticity of the probe maintains stable structural performance and reliable reset capability during repeated opening and closing, avoiding plastic deformation; on the other hand, the high thermal conductivity establishes an efficient heat conduction path from the heating element to the measurement part, significantly reducing temperature measurement hysteresis and heat loss. The probe arms 31 are rationally divided into three functional areas along the axial direction: the front working part directly contacts the heating element 02, and its slender structure is specifically designed to solve the accessibility problem of the narrow internal space of the smoking device; the middle mating part works in conjunction with the constraint part 51; and the rear measuring part is specifically used for temperature signal acquisition.

[0073] The drive positioning system provides precise control for probe movement. The drive mechanism 4 is securely mounted on the base 1 via a support, and its output end is fixedly connected to the connecting part 32 of the elastic probe clamp 3. This mechanism preferably uses a linear drive device such as an electric push rod, a cylinder, or a linear motor.

[0074] The gap adjustment and clamping system is a key actuator for achieving precise measurement. The system's constraint part 51 features a meticulously designed conical cavity into which the central mating part of the probe arm 31 precisely passes. This innovative conical mating structure cleverly transforms the axial displacement of the constraint part into radial compression of the probe arm, achieving precise control of the clamping force and clamping stroke. This effectively solves the technical challenge of traditional clamps struggling to achieve precise clamping force control in confined spaces. The constraint part 51 is made of heat-insulating and wear-resistant materials such as polyetheretherketone (PEEK) or zirconia ceramic. This material property simultaneously solves the problems of heat loss and mechanism wear: the heat insulation performance prevents heat loss through the constraint part, ensuring heat flow is conducted along a predetermined path; the wear resistance performance guarantees the service life of the mechanism under long-term sliding contact.

[0075] The system's precision is further ensured by a precise guiding and locking mechanism. The mounting base 52 and the machine base 1 achieve smooth relative movement via a sliding guide assembly consisting of a guide rail 53 and a slider 54. The positioning and locking assembly includes an elongated groove 56, a threaded hole, and a positioning and locking element 55. This mechanism effectively solves the positioning accuracy and stability problems during gap adjustment, ensuring that the two working positions can be accurately established and reliably maintained.

[0076] The temperature measurement system employs a unique indirect measurement scheme. Two thermally isolated insulated measurement chambers 6 respectively house the rear measuring section of the probe arm 31. The innovative design of the insulated measurement chambers primarily addresses the technical challenge of environmental thermal fluctuation interference. It utilizes a composite thermal insulation structure consisting of a structural support layer, a core insulation layer, and an internal heat-reflecting layer. By synergistically suppressing heat conduction and heat radiation, it creates a highly stable local thermal environment for temperature measurement.

[0077] The infrared observation window 61 is positioned at a predetermined location on the wall of the thermal insulation measurement chamber 6, aligned with the detection end of the infrared temperature measuring device 7. This configuration enables indirect temperature measurement, providing technical feasibility for effective temperature measurement of the surface of low-emissivity heating elements by measuring the surface temperature of the probe arm's rear end, which has a known and stable emissivity.

[0078] The infrared temperature measuring device 7 operates in the 3μm to 5μm range, a band configuration adapted to the infrared radiation characteristics of the heating element at its operating temperature. The infrared observation window 61 is made of zinc selenide or sapphire crystal material, which have high transmittance performance within the operating band, facilitating the transmission of infrared radiation signals.

[0079] This combined design enables effective infrared temperature measurement under low emissivity surface conditions by establishing a stable indirect temperature measurement path.

[0080] The position marking system provides an intuitive visual reference for the operation process. A first position mark and a second position mark are provided axially on the probe arm 31, working in conjunction with a reference mark on the constraint part 51. Preferably, the reference mark is located on the end face edge of the constraint part 51 near the drive mechanism 4. This marking system effectively solves the problem of relying on experience to determine the working position during operation, ensuring consistency in probe insertion depth and clamping position in each measurement through clear visual guidance.

[0081] Example 2

[0082] Based on the apparatus described in Embodiment 1, this embodiment provides a method for detecting the temperature of a heating element, the method comprising the following steps:

[0083] Step (1): Install the heating smoke device 01 on the clamp 2 and secure it reliably through the quick clamping mechanism; move the gap adjustment mechanism to position the constraint part 51 at an initial position at a predetermined distance from the end face of the heating smoke device 01, so as to establish a reference for subsequent measurements.

[0084] Step (2): Start the drive mechanism 4 to drive the elastic probe clamp 3 to move along its axis toward the heating smoke device 01; by monitoring the relative position of the first position mark on the probe arm 31 and the reference mark on the constraint part 51, when the first position mark and the reference mark reach the first predetermined relative position, stop the drive mechanism 4; at this time, the device is in the first working position, the front working part of the probe arm 31 is kept open in the conical cavity of the constraint part 51, and passes through the heating element 02 on both sides without contact.

[0085] Step (1): Maintain the axial position of the elastic probe clamp 3 and move the gap adjustment mechanism; by monitoring the relative position of the second position mark on the probe arm 31 and the reference mark, when the second predetermined relative position is reached, stop moving and lock the gap adjustment mechanism;

[0086] At this time, the device is in the second working position, and the inner wall of the conical cavity of the constraint part 51 contacts and engages with the middle mating part of the probe arm 31, so that the front working part produces a radial clamping action and forms thermal contact with the heating element 02.

[0087] The temperature of the measuring section at the rear end of the probe arm 31 is measured non-contactly using the temperature measuring system.

[0088] Step (4): Move the gap adjustment mechanism back to the initial position, so that the front working part opens to release the heating element 02; drive mechanism 4 drives elastic probe clamp 3 back to the initial measurement position.

[0089] The method achieves non-destructive positioning and stable thermal contact of the heating element by establishing the first and second working positions; it solves the technical problem of difficulty in directly measuring the surface temperature of low-emissivity heating elements by measuring the temperature of the measuring part at the rear end of the probe arm 31 with a known emissivity; and it improves the repeatability of measurement results by ensuring the consistency of the operation process through mechanical positioning marks.

[0090] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A temperature detection device for a heating element, characterized in that, include: Base (1); A clamp (2) is set on the base (1) for fixing the heating fume (01) to be tested. The elastic probe clip (3) is composed of a pair of probe arms (31) and a connecting part (32) connecting the tails of the two arms; The drive mechanism (4) has its output end fixedly connected to the connecting part (32) of the elastic probe clip (3) and is used to provide a driving force to make the elastic probe clip (3) move along its axial direction. The gap adjustment mechanism is slidably connected to the base (1) and includes a constraint part (51), through which the pair of probe arms (31) pass. A temperature measurement system for non-contact measurement of the temperature of the measuring section at the rear end of the pair of probe arms (31); The driving mechanism (4) drives the elastic probe clamp (3) to move axially. By changing the relative position of the probe arm (31) and the constraint part (51), the radial opening and closing action of the working part at the front end of the probe arm (31) is realized, thereby clamping or releasing the heating element (02) in the heating smoke appliance.

2. The apparatus according to claim 1, characterized in that, The probe arm (31) is divided along its axial direction into a front working part for contacting the heating element, a middle mating part for interacting with the constraint part (51), and a rear measuring part for temperature measurement. The constraint part (51) is provided with a conical cavity, and the middle mating part of the probe arm (31) passes through the conical cavity, so that the constraint part (51) can control the radial opening and closing of the front working part through the interaction with the middle mating part.

3. The apparatus according to claim 1 or 2, characterized in that, The driving axis of the driving mechanism (4), the telescopic axis of the elastic probe clamp (3), the constraint axis of the gap adjustment mechanism, and the positioning axis of the clamp (2) are collinear.

4. The apparatus according to claim 1, characterized in that, The temperature measurement system includes two thermally insulated measurement chambers (6) that are thermally isolated from each other, and the rear measuring parts of the two probe arms (31) are respectively housed in the corresponding thermally insulated measurement chambers (6); The front and rear ends of the thermal insulation measurement chamber (6) are respectively provided with a front guide hole and a rear guide hole. The probe arm (31) passes through the front and rear guide holes, so that the front working part is located outside the thermal insulation measurement chamber (6). The front and rear guide holes are configured to allow the probe arm (31) to oscillate radially as it moves axially, caused by the opening and closing action of the front end.

5. The apparatus according to claim 4, characterized in that, The temperature measurement system also includes an infrared temperature measuring device (7); an infrared observation window (61) is provided on the wall of the insulated measurement chamber (6); the detection end of the infrared temperature measuring device (7) is facing the infrared observation window (61) and is used to measure the temperature of the measuring part at the rear end of the probe arm (31) non-contactly through the observation window.

6. The apparatus according to claim 2, characterized in that, The gap adjustment mechanism also includes a mounting base (52); The constraint part (51) is fixed to the mounting base (52); The mounting base (52) and the base (1) are slidably connected; The constraint part (51) is configured to have two working positions: In the first working position, the conical cavity of the constraint part (51) is disengaged from the middle mating part of the probe arm (31) or there is a radial gap. At this time, the front working part remains open under its own elasticity and can be inserted into both sides of the heating element without contact. In the second working position, by sliding the mounting base (52), the inner wall of the conical cavity of the constraint part (51) slides into contact with the outer surface of the conical mating part of the probe arm (31) and applies radial pressure, forcing the front working part to produce a clamping action.

7. The apparatus according to claim 6, characterized in that, The mounting base (52) is connected to the base (1) via a sliding guide assembly. The sliding guide assembly includes a guide rail (53) fixedly mounted on the base (1) and a slider (54) correspondingly mounted on the bottom of the mounting base (52) and cooperating with the guide rail (53).

8. The apparatus according to claim 7, characterized in that, The mounting base (52) is fixed in position on the guide rail (53) by a positioning and locking assembly; The positioning and locking assembly includes: an elongated groove (56) disposed on the base (1), the extension direction of the elongated groove (56) being parallel to the guide rail (53); a threaded hole disposed on the mounting base (52); and a positioning and locking member (55). The positioning locking member (55) passes through the elongated groove (56) in sequence and is threadedly engaged with the threaded hole; when the positioning locking member (55) is tightened, the clamping force generated thereon presses the mounting base (52) and the machine base (1) together and fixes them, thereby locking the mounting base (52) in the required working position.

9. The apparatus according to any one of claims 1 to 8, characterized in that, The probe arm (31) is provided with a first position mark and a second position mark along its axial direction; The constraint part (51) or the mounting base (52) is provided with a reference mark that is used in conjunction with the first and second position marks; The first position identifier, the second position identifier, and the reference identifier are configured to indicate the first working position and the second working position.

10. A method for detection using the apparatus according to any one of claims 1-9, characterized in that, Includes the following sequential steps: Step (1): Fix the heating device onto the clamp (2); move the gap adjustment mechanism so that the constraint part (51) is positioned close to the end face of the device to a preset initial position; Step (2): Start the drive mechanism (4) to drive the elastic probe clip (3) to move axially in the direction of the smoking device; by observing the relative positional relationship between the first position mark on the probe arm (31) and the reference mark on the constraint part (51), when the two reach the first predetermined relative position, stop the drive mechanism (4). At this time, the device is in the first working position, and the front working part of the probe arm (31) is kept open in the conical cavity of the constraint part (51) and is inserted into both sides of the heating element without contact. Step (3): Keep the elastic probe clamp (3) axially stationary and move the gap adjustment mechanism; by observing the relative positional relationship between the second position mark on the probe arm (31) and the reference mark on the constraint part (51), stop moving the gap adjustment mechanism when the two reach the second predetermined relative position; At this time, the device is in the second working position, the inner wall of the conical cavity of the constraint part (51) contacts the middle mating part of the probe arm (31) and applies radial pressure, forcing the front working part to clamp the heating element; the temperature of the rear measuring part of the probe arm (31) is measured non-contactly by the temperature measuring system; Step (4): Move the gap adjustment mechanism back to the vicinity of the initial position, so that the front working part opens to release the heating element; Subsequently, the drive mechanism (4) drives the elastic probe clamp (3) to retract axially.

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