Electronic temperature adjusting rod structure with over-temperature heat protector

Abstract

The utility model relates to the technical field of household appliances, and discloses an electronic temperature adjusting rod structure with an over-temperature heat protector, which comprises a shell, a power line, an anode plug bush, a cathode plug bush, a temperature sensing rod, a key display module, a temperature control circuit board and the over-temperature heat protector, the temperature control circuit board is provided with a positive electrode output position and a negative electrode output position; the over-temperature thermal protector is provided with a low-resistance circuit and a high-resistance circuit which are connected in parallel; when the temperature exceeds a set value due to the abnormality of the electrical equipment, the low-resistance circuit of the over-temperature heat protector is switched off, and the high-resistance circuit is switched on to protect the electrical equipment. And after the power supply is powered off and cooled, the low-resistance circuit is closed again, conducted and reset. The electronic temperature adjusting rod structure with the over-temperature heat protector provided by the utility model has double over-temperature protection mechanisms for electrical equipment, is more intelligent in use, and can display, regulate and control the temperature of the electrical equipment, so that a user can intuitively know the state of the electrical equipment, and the use safety of the electrical equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an electronic temperature control rod structure with an overheat protector. Background Art

[0002] At present, pan-frying and stir-frying integrated cookware such as grills, frying pans, and electric hot pots are all equipped with detachable temperature control rods. The temperature control rod can not only supply power to the heating element of the cookware, but also accurately control the cooking temperature to meet different cooking needs.

[0003] Chinese Patent No. CN202122803853.7 discloses an insertable adjustable thermostat, which includes a temperature sensing mechanism. The temperature sensing mechanism includes a probe thermostat and a snap-action thermostat, and the snap-action thermostat is a manual reset snap-action thermostat. The probe thermostat is formed with a heat transfer support plate, and a retaining ring is fixedly connected to the heat transfer support plate. The snap-action thermostat is connected to the probe thermostat through the retaining ring. Among them, the retaining ring includes a bottom plate and a plurality of elastic pieces extending upward from the upper surface of the bottom plate. The plurality of elastic pieces gradually approach each other from bottom to top and form an opening above. The minimum size of the inner diameter formed by the opening is smaller than the outer diameter of the snap-action thermostat in the non-loaded state. The snap-action thermostat is vertically pressed downward through the opening so as to be wrapped and limitedly pressed by the plurality of elastic pieces. However, this insertable adjustable thermostat uses a combination of a probe thermostat and a snap-action thermostat, and its use is not intelligent enough. Specifically, on the one hand, the probe thermostat cannot automatically adjust the temperature of the electrical equipment and display the temperature of the electrical equipment. On the other hand, the snap-action thermostat is a manual reset snap-action thermostat. Since the reset button of the snap-action thermostat is too small, users (especially the elderly) are prone to ignore or not understand the reset operation of the snap-action thermostat, resulting in the inability to use this insertable adjustable thermostat normally. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the problems of the prior art and provide an electronic temperature control rod structure with an overheat protector.

[0005] In order to achieve the above purpose, the utility model adopts the following scheme:

[0006] An electronic temperature control rod structure with an overheat protector includes a housing, a power cord, a positive plug sleeve and a negative plug sleeve; the positive plug sleeve and the negative plug sleeve are connected side by side and spaced apart at the front end of the housing; further includes:

[0007] A temperature sensing rod, the front end of which extends out of the front end of the housing;

[0008] Button display module, temperature control circuit board; the temperature control circuit board is electrically connected to the power cord, temperature sensor probe and button display module respectively; the temperature control circuit board has a positive output terminal and a negative output terminal electrically connected to the positive socket and the negative socket respectively;

[0009] Overheat protector; the overheat protector is connected to the circuit between the positive output terminal and the positive socket and / or the circuit between the negative output terminal and the negative socket;

[0010] The overheat protector has a low-resistance circuit and a high-resistance circuit connected in parallel; when the temperature exceeds the set value due to abnormal electrical equipment, the low-resistance circuit of the overheat protector is disconnected, and the high-resistance circuit is closed and conducting to protect the electrical equipment;

[0011] And after the power is cut off and cooled, the high-resistance circuit is disconnected, and the low-resistance circuit is re-closed and conducting to reset.

[0012] Further, the overheat protector includes a front electrical connection terminal, a rear electrical connection terminal, an insulating board, a conductive housing, a deformable metal sheet, a moving contact, a static contact, a conductive clamping cover, a conductive cover plate and a PTC heating element; the conductive housing is installed on the upper end surface of the insulating board; the conductive housing has a metal sheet deformation cavity; the rear electrical connection terminal is connected to the rear end of the conductive housing;

[0013] The conductive cover plate is installed on the lower end surface of the insulating board; the PTC heating element is electrically connected to the lower end surface of the conductive cover plate; the conductive clamping cover clamps and fixes the PTC heating element and encloses the insulating board and is fixedly electrically connected to the front end of the conductive housing; the conductive clamping cover is connected to the front electrical connection terminal;

[0014] The lower end of the static contact is connected to the rear end of the conductive cover plate, and the upper end of the static contact passes through the insulating board and is placed in the metal sheet deformation cavity; the deformable metal sheet is located in the metal sheet deformation cavity; one end of the deformable metal sheet is electrically connected to the conductive housing and is located in front of the static contact; the other end of the deformable metal sheet is inclined downward and connected to the moving contact; the moving contact is in contact connection with the static contact;

[0015] The rear electrical connection terminal, conductive housing, deformable metal sheet, moving contact, static contact, conductive clamping cover and front electrical connection terminal form the low-resistance circuit; the rear electrical connection terminal, conductive housing, conductive clamping cover, conductive cover plate, PTC heating element and front electrical connection terminal form the high-resistance circuit.

[0016] Further, one end of the deformable metal sheet is electrically connected to the conductive housing through a fixing nail.

[0017] Further, the deformable metal sheet has an arc sheet structure.

[0018] Further, an insulating sleeve is sleeved outside the overheat protector.

[0019] Further, the insulating sleeve is made of PVC material or silicone rubber material.

[0020] Further, the electronic temperature control rod structure with an overheat protector further includes a voice module electrically connected to the temperature control circuit board.

[0021] Further, the key display module includes a PCB substrate, a key module and a display screen; the PCB substrate is connected to the housing; the key module and the display screen are both connected to the PCB substrate and electrically connected to the temperature control circuit board respectively.

[0022] Further, the rear end of the temperature sensing rod is installed on the front end of the housing and is located between the positive plug sleeve and the negative plug sleeve; the temperature sensing rod includes a sensing tube body installed on the front end of the housing and an NTC thermistor sensor arranged in the sensing tube body; the NTC thermistor sensor is electrically connected to the temperature control circuit board.

[0023] Further, the housing includes an upper housing and a lower housing which is adaptively connected to the upper housing; the power cord, the positive plug sleeve, the negative plug sleeve, the temperature sensing rod, the temperature control circuit board and the overheat protector are installed on the lower housing; the key display module is installed on the upper housing.

[0024] Compared with the existing technology, the utility model has the following advantages:

[0025] 1. The utility model combines a housing, a power cord, a positive socket, a negative socket, a temperature sensing rod, a button display module, a temperature control circuit board and an overheat protector. By using the temperature sensing rod and the temperature control circuit board, a first-level overheat protection mechanism is formed. Then, the overheat protector replaces the disposable fuse, and there is no need to disassemble and replace the overheat protector, which can be reused, avoiding the trouble of replacing the component temperature fuse, and forming a good second-level overheat protection mechanism. When the electrical equipment is abnormal and the temperature sensing rod and the temperature control circuit board cannot control the temperature, it is easy to cause the temperature around the electrical equipment to rise. When the temperature exceeds the set value due to the abnormality of the electrical equipment, that is, when the temperature reaches the disconnection temperature value of the overheat protector, the low-resistance circuit of the overheat protector disconnects, and the high-resistance circuit closes and conducts, quickly cutting off the normal working circuit of the electrical equipment, and the electrical equipment stops heating, achieving the effect of protecting the electrical equipment. Subsequently, as long as the input power of the power cord is disconnected first, the overheat protector can automatically reset and connect after being powered off and cooled, that is, the high-resistance circuit disconnects, and the low-resistance circuit reconnects and conducts to reset. The overheat protector can be reused after being powered on again. Compared with the existing manually reset snap-action thermostat, there is no need for manual reset, forming a dual overheat protection mechanism, which can improve the use safety of electrical equipment, monitor in real time and automatically respond to overheat conditions, and effectively prevent the damage of electrical equipment and safety accidents caused by overheating.

[0026] 2. The utility model combines the temperature sensing rod, the temperature control circuit board and the button display module for use. Compared with the existing temperature adjusting rod structure, it is more intelligent, can display and adjust the temperature of the electrical equipment, and users can intuitively understand the state of the electrical equipment, realizing more intelligent temperature control and management.

[0027] 3. The utility model designs a low-resistance circuit and a high-resistance circuit connected in parallel on the overheat protector to ensure that the normal working circuit of the electrical equipment is quickly cut off in case of overheating, and the electrical equipment stops heating. At the same time, it automatically resets after cooling, reducing manual intervention and improving the continuity and stability of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following further details the present application in conjunction with the drawings and specific embodiments.

[0029] Figure 1 FIG. is an exploded three-dimensional structural schematic diagram of the electronic temperature adjusting rod structure with an overheat protector in Embodiment 1 of the present utility model.

[0030] Figure 2 FIG. is a three-dimensional structural schematic diagram of the electronic temperature adjusting rod structure with an overheat protector in Embodiment 1 of the present utility model.

[0031] Figure 3It is a top - view structural schematic diagram after removing the upper shell and the key - display module from the electronic temperature - regulating rod structure with an over - temperature protector in Embodiment 1 of the present utility model.

[0032] Figure 4 It is an exploded three - dimensional structural schematic diagram of the over - temperature protector and the insulating sleeve of the present utility model.

[0033] Figure 5 It is a sectional structural schematic diagram of the over - temperature protector and the insulating sleeve of the present utility model.

[0034] Figure 6 It is a top - view structural schematic diagram after removing the upper shell and the key - display module from the electronic temperature - regulating rod structure with an over - temperature protector in Embodiment 2 of the present utility model.

[0035] Figure 7 It is a top - view structural schematic diagram after removing the upper shell and the key - display module from the electronic temperature - regulating rod structure with an over - temperature protector in Embodiment 3 of the present utility model.

[0036] The figure includes:

[0037] Shell 1, upper shell 11, lower shell 12, power cord 2, positive plug sleeve 3, negative plug sleeve 4, temperature - sensing rod 5, sensing tube body 51, NTC thermistor 52, key - display module 6, PCB substrate 61, key module 62, display screen 63, temperature - control circuit board 7, positive output position 71, negative output position 72, over - temperature protector 8, front power - connection terminal 81, rear power - connection terminal 82, insulating plate 83, conductive outer shell 84, metal - sheet deformation cavity 841, deformed metal sheet 85, moving contact 86, static contact 87, conductive clamping cover 88, conductive cover plate 89, PTC heating element 810, fixing nail 811, insulating sleeve 9, voice module 10. Specific embodiments

[0038] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but not to limit the scope of the present utility model.

[0039] As Figures 1 to 5As shown in the figure, an electronic temperature control rod structure with an overheat protector includes a housing, a power cord, a positive plug socket, a negative plug socket, a temperature sensing rod, a key display module, a temperature control circuit board, and an overheat protector; the positive plug socket and the negative plug socket are connected side by side at intervals at the front end of the housing. The front end of the temperature sensing rod extends outside the front end of the housing; specifically, the rear end of the temperature sensing rod is installed on the front end of the housing and is located between the positive plug socket and the negative plug socket; the temperature sensing rod includes a sensing tube body installed on the front end of the housing and an NTC thermistor sensor provided in the sensing tube body; the NTC thermistor sensor is electrically connected to the temperature control circuit board. Such a temperature sensing rod has a good function of detecting the heating temperature of electrical equipment. The temperature control circuit board is electrically connected to the power cord, the temperature sensing rod, and the key display module respectively; the temperature control circuit board has a positive output terminal and a negative output terminal that are electrically connected to the positive plug socket and the negative plug socket respectively; an overheat protector is connected in the circuit between the positive output terminal and the positive plug socket. The overheat protector has a low-resistance circuit and a high-resistance circuit connected in parallel; in the normal working state, the low-resistance circuit is in a closed and conducting state to ensure smooth current passing; while the high-resistance circuit is in an open state and does not participate in current transmission. When the temperature exceeds the set value due to an abnormality of the electrical equipment, the low-resistance circuit of the overheat protector is disconnected, and the high-resistance circuit is closed and conducting to protect the electrical equipment; and after the power supply is unplugged and cooled, the high-resistance circuit is disconnected, and the low-resistance circuit is re-closed and conducting to reset. Designing a low-resistance circuit and a high-resistance circuit connected in parallel on the overheat protector ensures that the normal working circuit of the electrical equipment is quickly cut off in case of overheating, the electrical equipment stops heating, and at the same time it automatically resets after cooling, reducing manual intervention and improving the continuity and stability of equipment use.

[0040] The structure of the electronic temperature control rod with an overheat protector is combined with a housing, a power cord, a positive plug sleeve, a negative plug sleeve, a temperature sensing rod, a button display module, a temperature control circuit board and an overheat protector. A first-level overheat protection mechanism is formed by the temperature sensing rod and the temperature control circuit board. Then, the overheat protector is used to replace the disposable fuse. There is no need to disassemble and replace the overheat protector, and it can be reused, avoiding the trouble of replacing the component temperature fuse, and forming a good second-level overheat protection mechanism. When the electrical equipment is abnormal and the temperature sensing rod and the temperature control circuit board cannot control the temperature, it is easy to cause the temperature around the electrical equipment to rise. When the temperature exceeds the set value due to the abnormality of the electrical equipment, that is, when the temperature reaches the disconnection temperature value of the overheat protector, the low-resistance circuit of the overheat protector disconnects, and the high-resistance circuit closes and conducts, quickly cutting off the normal working circuit of the electrical equipment, and the electrical equipment stops heating, achieving the function of protecting the electrical equipment. Subsequently, as long as the input power of the power cord is first disconnected, the overheat protector can automatically reset and connect after being powered off and cooled, that is, the high-resistance circuit disconnects, and the low-resistance circuit re-closes and conducts to reset. The overheat protector can be reused after being re-powered, which does not require manual reset compared with the existing manual reset snap-action thermostat, forming a dual overheat protection mechanism, which can improve the use safety of electrical equipment, monitor in real time and automatically respond to overheat conditions, and effectively prevent damage to electrical equipment and safety accidents caused by overheating. At the same time, the temperature sensing rod, the temperature control circuit board and the button display module are combined and used. Compared with the existing temperature control rod structure, it is more intelligent, can display and regulate the temperature of the electrical equipment, and the user can intuitively understand the state of the electrical equipment, realizing more intelligent temperature control and management.

[0041] Specifically, the overheat thermal protector includes a front power connection terminal, a rear power connection terminal, an insulating plate, a conductive housing, a deformable metal sheet, a moving contact, a static contact, a conductive clamping cover, a conductive cover plate, and a PTC heating element. The insulating plate is a ceramic insulating plate, which plays a good insulating role. Of course, other better insulating materials can also be used. The conductive housing is installed on the upper end surface of the insulating plate; the conductive housing has a metal sheet deformation cavity; the rear power connection terminal is connected to the rear end of the conductive housing; the conductive cover plate is installed on the lower end surface of the insulating plate; the PTC heating element is electrically connected to the lower end surface of the conductive cover plate; the PTC heating element is small in volume and has a fast disconnection action. When the temperature reaches the set specification, the circuit is automatically cut off. The conductive clamping cover clamps and fixes the PTC heating element and sheathes the insulating plate and is fixedly and electrically connected to the front end of the conductive housing; the conductive clamping cover is connected to the front power connection terminal; the lower end of the static contact is connected to the rear end of the conductive cover plate, and the upper end of the static contact passes through the insulating plate and is placed in the metal sheet deformation cavity; the deformable metal sheet is located in the metal sheet deformation cavity; one end of the deformable metal sheet is electrically connected to the conductive housing and is located in front of the static contact; specifically, one end of the deformable metal sheet is electrically connected to the conductive housing through a fixing nail, which is convenient for installation, and the connection and conduction between the structures are stable. The other end of the deformable metal sheet is inclined downward and connected to the moving contact; the moving contact is in contact connection with the static contact; the rear power connection terminal, the conductive housing, the deformable metal sheet, the moving contact, the static contact, the conductive clamping cover, and the front power connection terminal form the low-resistance circuit; the rear power connection terminal, the conductive housing, the conductive clamping cover, the conductive cover plate, the PTC heating element, and the front power connection terminal form the high-resistance circuit. By setting up the front power connection terminal, the rear power connection terminal, the insulating plate, the conductive housing, the deformable metal sheet, the moving contact, the static contact, the conductive clamping cover, the conductive cover plate, and the PTC heating element to form an overheat thermal protector, it effectively solves the problems brought by the traditional temperature control rod structure using a disposable fuse. There is no need to disassemble and replace the overheat thermal protector, and it can be reused, avoiding the trouble of replacing the component temperature fuse, reducing the operation of maintenance and replacement, saving time and cost, extending the service life of electrical equipment, and reducing the distress and costs caused by maintenance for users and manufacturers.

[0042] To more clearly understand the overheat thermal protector, the principle of the overheat thermal protector in this electronic temperature control rod structure is as follows:

[0043] When the electrical equipment is working normally, the moving contact is in contact with the static contact. The rear electrical connection terminal, the conductive housing, the deformable metal sheet, the moving contact, the static contact, the conductive clamping cover and the front electrical connection terminal form a low-resistance circuit. The resistance value of this low-resistance circuit is very small, similar to a wire. Then the rear electrical connection terminal, the conductive housing, the conductive clamping cover, the conductive cover plate, the PTC heating element and the front electrical connection terminal form a high-resistance circuit. When the static contact and the moving contact are in contact, the low-resistance circuit is connected in parallel with the high-resistance circuit, similar to a wire connected in parallel with the PTC heating element. Since the resistance of the PTC heating element is relatively large, the PTC heating element is in a short-circuited state, and the electronic temperature control rod structure with the overheat protector is in a conducting state. At this time, the positive plug sleeve and the negative plug sleeve are also electrically connected to the electrical equipment. The temperature control circuit board controls the electrical equipment to be powered on and heated at a low temperature. The temperature sensing rod detects the temperature of the electrical equipment in real time, feeds it back to the temperature control circuit board, and displays the temperature on the button display module. The user can intuitively understand the temperature state of the electrical equipment, realizing more intelligent temperature control and management. When the temperature sensing rod detects that the electrical equipment is at a high temperature, the temperature control circuit board receives the temperature feedback from the temperature sensing rod, controls the electrical equipment to cut off the power, and the electrical equipment stops heating. After detecting that the temperature of the electrical equipment has dropped, it resumes controlling the electrical equipment to be powered on and heated, maintaining the electrical equipment to work within the set temperature range.

[0044] In the case where the electrical equipment is abnormal and the temperature cannot be controlled through the temperature control circuit board, it is easy to cause the temperature around the electrical equipment to rise. When the temperature exceeds the set value due to the abnormality of the electrical equipment, that is, when the temperature reaches the disconnection temperature value of the overheat protector, the low-resistance circuit of the overheat protector disconnects, and the high-resistance circuit closes and conducts. Specifically, the moving contact on the deformable metal sheet quickly jumps off, causing the moving contact and the static contact to disconnect, cutting off the circuit, that is, cutting off the low-resistance circuit. At the same time, since the voltage on the disconnected moving contact is applied to the PTC heating element, enough heat is generated to keep the deformable metal sheet in the jumped-off state. At this time, the heating element of the electrical equipment and the PTC heating element are in series. Since the resistance value of the PTC heating element is much higher than the resistance value of the heating element of the electrical equipment, according to the principle of resistance voltage division in a series circuit, most of the voltage is applied to the PTC heating element, which is equivalent to the overheat protector quickly cutting off the normal working circuit of the electrical equipment, and the electrical equipment stops heating, achieving the function of protecting the electrical equipment; in subsequent use, as long as the input power of the power cord is disconnected first, after the PTC heating element cools down, the deformable metal sheet can automatically reset, the moving contact and the static contact re-contact, the low-resistance circuit re-conducts and resets, the high-resistance circuit disconnects, and the overheat protector can be reused after being re-powered on.

[0045] Preferably, the deformable metal sheet has an arc-shaped sheet structure. Since the deformable metal sheet makes a bouncing movement up and down when it jumps off, therefore, making the deformable metal sheet have an arc-shaped sheet structure is conducive to the movable end of the deformable metal sheet making a jumping deformation up and down in the metal sheet deformation cavity, so as to achieve the effect of connecting or disconnecting a low-resistance circuit.

[0046] In this embodiment, an insulating sleeve is sleeved outside the overheat thermal protector, which plays an insulating role and provides good protection for the overheat thermal protector; preferably, the insulating sleeve is made of PVC material or silicone rubber material.

[0047] In this embodiment, the electronic temperature control rod structure with an overheat thermal protector further includes a voice module electrically connected to the temperature control circuit board. By setting the voice module, the user can complete the control of the electronic temperature control rod structure with an overheat thermal protector through voice, simplify the operation process of the electrical equipment, improve the operation efficiency and convenience, realize human-machine communication, and achieve the effect of intelligent design.

[0048] In this embodiment, for the button display module, the button display module includes a PCB substrate, a button module, and a display screen; the PCB substrate is connected to the housing; the button module and the display screen are both connected to the PCB substrate and electrically connected to the temperature control circuit board respectively. By setting the PCB substrate, the button module, and the display screen, operations such as turning on and off the power, adjusting the temperature, and setting the time can be achieved through the button module. For the type of the button module, existing ordinary pressing buttons can be used, or spring touch buttons can be used, and other button types are also possible. The display module can display the temperature of the temperature sensing rod in real time, and of course, it can also display the time setting, such as the heating time of the electrical equipment, and display other functions.

[0049] To facilitate the various structures of the electronic temperature control rod structure with an overheat thermal protector, the housing includes an upper housing and a lower housing that is adaptively connected to the upper housing; the power cord, the positive plug sleeve, the negative plug sleeve, the temperature sensing rod, the temperature control circuit board, and the overheat thermal protector are installed on the lower housing; the button display module is installed on the upper housing.

[0050] It should be noted that the voice module and the temperature control circuit board are both general standard parts or components known to those skilled in the art. Their structures and principles can be known by those skilled in the art through technical manuals or obtained through conventional experimental methods. The specific implementation of this application may involve the use of software, but the software used is the most commonly used software by those skilled in the art, and it is not the scope protected by the claims of this patent application.

[0051] For the overheat thermal protector, in another embodiment, the overheat thermal protector is a manually reset 17AM series thermal protector, which can replace the overheat thermal protector in Embodiment 1 of this example. As an existing 17AM thermostat, this manually reset 17AM series thermal protector is a protection component that can accurately control the overheating of electrical equipment. When the temperature exceeds the set value due to the abnormality of the electrical equipment, it can quickly cut off the normal working circuit of the electrical equipment, and the electrical equipment stops heating. At the same time, after manually unplugging the power and cooling after power-off, it can automatically reset, reducing manual intervention and improving the continuity and stability of equipment use. For the wiring terminals of the 17AM series thermal protector, they can be on the same side of its shell or on both sides of its shell, and the same effect can be achieved.

[0052] Embodiment 2:

[0053] In Embodiment 2, as Figure 6 shown, the structure of the electronic temperature control rod with an overheat thermal protector in this embodiment is basically the same as that in Embodiment 1. The difference lies in the position where the overheat thermal protector is set. When the number of overheat thermal protectors is 1, an overheat thermal protector is connected to the circuit between the negative output terminal and the negative socket. Designing the overheat thermal protector in this way can also be reused. Combined with the temperature sensing rod and the temperature control circuit board, a dual overheat protection mechanism is formed, which can improve the use safety of electrical equipment, monitor overheating in real time and automatically respond to overheating situations, and effectively prevent damage to electrical equipment and safety accidents caused by overheating.

[0054] Embodiment 3:

[0055] In Embodiment 3, as Figure 7 shown, the structure of the electronic temperature control rod with an overheat thermal protector in this embodiment is basically the same as that in Embodiment 1. The difference lies in the position where the overheat thermal protector is set. When the number of overheat thermal protectors is 2, an overheat thermal protector is connected to the circuit between the positive output terminal and the positive socket and the circuit between the negative output terminal and the negative socket. Designing the overheat thermal protector in this way can also be reused. Combined with the temperature sensing rod and the temperature control circuit board, a dual overheat protection mechanism is formed, which can improve the use safety of electrical equipment, monitor overheating in real time and automatically respond to overheating situations, and effectively prevent damage to electrical equipment and safety accidents caused by overheating.

[0056] In summary, the embodiments of the present utility model provide a structure of an electronic temperature control rod with an overheat thermal protector. Among them, the structure of the electronic temperature control rod with an overheat thermal protector has the following advantages:

[0057] 1. By combining a housing, a power cord, a positive socket, a negative socket, a temperature sensing rod, a button display module, a temperature control circuit board, and an overheat protector, a first-level overheat protection mechanism is formed by using the temperature sensing rod and the temperature control circuit board. Then, the overheat protector is used to replace the disposable fuse, which does not need to be disassembled and replaced, can be reused, and avoids the trouble of replacing the component temperature fuse, thus forming a good second-level overheat protection mechanism. When the electrical equipment is abnormal and the temperature sensing rod and the temperature control circuit board cannot control the temperature, it is easy to cause the temperature around the electrical equipment to rise. When the temperature exceeds the set value due to the abnormality of the electrical equipment, that is, when the temperature reaches the disconnection temperature value of the overheat protector, the low-resistance circuit of the overheat protector disconnects, and the high-resistance circuit closes and conducts, quickly cutting off the normal working circuit of the electrical equipment, and the electrical equipment stops heating, achieving the effect of protecting the electrical equipment. Subsequently, as long as the input power of the power cord is first disconnected, the overheat protector can automatically reset and connect after being powered off and cooled, that is, the high-resistance circuit disconnects, and the low-resistance circuit re-closes and conducts to reset. The overheat protector can be reused after being re-powered, which does not require manual reset compared with the existing manual reset snap-action thermostat. The dual overheat protection mechanism can improve the use safety of electrical equipment, monitor in real time and automatically respond to overheat conditions, and effectively prevent the damage of electrical equipment and safety accidents caused by overheating.

[0058] 2. By combining the temperature sensing rod, the temperature control circuit board with the button display module, compared with the existing temperature adjusting rod structure, it is more intelligent in use, can display and regulate the temperature of the electrical equipment, and users can intuitively understand the state of the electrical equipment, realizing more intelligent temperature control and management.

[0059] 3. The overheat protector is designed with a low-resistance circuit and a high-resistance circuit connected in parallel to ensure that the normal working circuit of the electrical equipment is quickly cut off in case of overheat, and the electrical equipment stops heating. At the same time, it automatically resets after cooling, reducing manual intervention and improving the continuity and stability of equipment use.

[0060] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present application.

Claims

1. An electronic temperature regulating rod structure with an overheat protector, comprising a housing, a power cord, a positive plug sleeve and a negative plug sleeve; the positive plug sleeve and the negative plug sleeve are connected side by side at intervals on the front end of the housing; it is characterized in that, Further included are: A temperature sensing rod, whose front end extends outside the front end of the housing; A key display module and a temperature control circuit board; The temperature control circuit board is electrically connected to the power cord, the temperature sensing rod and the key display module respectively; on the temperature control circuit board, there are a positive output terminal and a negative output terminal that are electrically connected to the positive socket and the negative socket respectively; An overheat protector; the overheat protector is connected to the circuit between the positive output terminal and the positive socket and / or the circuit between the negative output terminal and the negative socket; The overheat protector has a low-resistance circuit and a high-resistance circuit connected in parallel; when the temperature exceeds the set value due to an abnormality of the electrical equipment, the low-resistance circuit of the overheat protector is disconnected, and the high-resistance circuit is closed and conducted to protect the electrical equipment; And after the power supply is cut off and cooled, the high-resistance circuit is disconnected, and the low-resistance circuit is re-closed and conducted to reset.

2. The structure of the electronic temperature regulating rod with an overheat protector according to claim 1, wherein The overheat protector includes a front electrical connection terminal, a rear electrical connection terminal, an insulating board, a conductive housing, a deformable metal sheet, a moving contact, a static contact, a conductive crimping cover, a conductive cover plate and a PTC heating element; the conductive housing is installed on the upper end surface of the insulating board; the conductive housing has a metal sheet deformation cavity; the rear electrical connection terminal is connected to the rear end of the conductive housing; The conductive cover plate is installed on the lower end surface of the insulating board; the PTC heating element is electrically connected to the lower end surface of the conductive cover plate; the conductive crimping cover crimps and fixes the PTC heating element and encloses the insulating board and is fixedly electrically connected to the front end of the conductive housing; the conductive crimping cover is connected to the front electrical connection terminal; The lower end of the static contact is connected to the rear end of the conductive cover plate, and the upper end of the static contact passes through the insulating board and is placed in the metal sheet deformation cavity; the deformable metal sheet is located in the metal sheet deformation cavity; one end of the deformable metal sheet is electrically connected to the conductive housing and is located in front of the static contact; The other end of the deformable metal sheet is inclined downward and connected to the moving contact; the moving contact is in contact connection with the static contact; The rear electrical connection terminal, the conductive housing, the deformable metal sheet, the moving contact, the static contact, the conductive crimping cover and the front electrical connection terminal form the low-resistance circuit; The rear electrical connection terminal, the conductive housing, the conductive crimping cover, the conductive cover plate, the PTC heating element and the front electrical connection terminal form the high-resistance circuit.

3. The structure of the electronic temperature control rod with an overheat protector according to claim 2, wherein, One end of the deformable metal sheet is electrically connected to the conductive housing through a fixing nail.

4. The structure of the electronic temperature control rod with an overheat protector according to claim 2, characterized in that, The deformable metal sheet has an arc-shaped sheet structure.

5. The structure of the electronic temperature regulating rod with an overheat protector according to claim 1 or 2, characterized in that, An insulating sleeve is sleeved outside the overheat protector.

6. The structure of the electronic temperature-adjustable rod with an overheat protector according to claim 5, wherein The insulating sleeve is made of PVC material or silicone rubber material.

7. The structure of the electronic temperature regulating rod with an overheat protector according to claim 1, characterized in that, Also included is a voice module electrically connected to the temperature control circuit board.

8. The structure of the electronic temperature regulating rod with an overheat protector according to claim 1, characterized in that, The key display module includes a PCB substrate, a key module and a display screen; the PCB substrate is connected to the housing; the key module and the display screen are both connected to the PCB substrate and are electrically connected to the temperature control circuit board respectively.

9. The structure of the electronic temperature control rod with an overheat protector according to claim 1, characterized in that, The rear end of the temperature sensing rod is installed on the front end of the housing and is located between the positive plug sleeve and the negative plug sleeve; the temperature sensing rod includes a temperature sensing tube body installed on the front end of the housing and an NTC thermistor sensor arranged in the temperature sensing tube body; the NTC thermistor sensor is electrically connected to the temperature control circuit board.

10. The structure of the electronic temperature control rod with an overheat protector according to claim 1, characterized in that, The housing includes an upper housing and a lower housing which is adaptively connected to the upper housing; the power cord, the positive plug sleeve, the negative plug sleeve, the temperature sensing rod, the temperature control circuit board and the overheat protector are installed on the lower housing; the button display module is installed on the upper housing.

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