A multi-limit temperature controller with magnetic blowing and adjustable trigger time

Abstract

The present invention relates to the technical field of temperature limiters, in particular to a multi-limit temperature limiter with magnetic blowing and adjustable triggering time, which is provided with at least two power-on circuits, each of which is provided with a contact group, and all contact groups share a power-off mechanism, which is used to disconnect all contact groups when the sensed temperature exceeds the triggering temperature; the temperature sensing part of the power-off mechanism is provided with at least two temperature sensing bags stacked from top to bottom, and the uppermost temperature sensing bag senses the temperature and conducts heat to the lower temperature sensing bag; connecting pieces are provided between the temperature sensing bags, and each time a connecting piece is opened from top to bottom, the triggering time is accelerated by one level, and the lowermost temperature sensing bag triggers the action part of the power-off mechanism; each contact group is independently provided with a magnetic blowing mechanism and a conductive arc extinguishing mechanism, and the contact groups are respectively arranged in the magnetic field formed by the corresponding magnetic blowing mechanism, and when the contact group is disconnected to generate an arc, the magnetic blowing mechanism magnetically blows the arc to the conductive arc extinguishing mechanism; at the same time, the arc problem of the temperature limiter and the uncontrollable triggering time problem are solved.

Description

Technical Field

[0001] The invention relates to the technical field of temperature limiters, in particular to a multi-limit temperature limiter with magnetic blowing and adjustable triggering time. Background Art

[0002] Multi-limit thermostats are widely used in various electrical equipment that require temperature protection, such as electric water heaters, electric oil heaters, electric ovens, etc. In these devices, multi-limit thermostats are important safety protection devices that can effectively prevent safety accidents caused by overheating. Multi-limit thermostats use at least two-pole connection methods to control multiple loads at the same time, or can control multiple-power electrical appliances in parallel, increase the flow rate of the equipment, and achieve the purpose of using small to drag large. For example, three-limit thermostats use three-pole connection methods to control three loads at the same time, or can control three-power electrical appliances in parallel. Its working principle is based on the temperature characteristics of temperature-sensitive elements (such as bimetallic strips). When the temperature of the equipment or system exceeds the set value, the temperature-sensitive element will deform, thereby triggering the action mechanism (such as a push rod) to move. The action mechanism pushes the moving contact to separate from the static contact, cuts off the circuit, and realizes the protection function. When the temperature drops to a safe range, the multi-limit thermostat needs to be manually reset to restore the normal operation of the circuit.

[0003] However, in a miniaturized multi-limit temperature controller, due to the limited space inside the shell, when the moving contact and the stationary contact separate and generate an arc, it is easy to burn the shell, the moving contact, the stationary contact or other internal components.

[0004] More importantly, multi-limit thermostats usually use bimetallic strips as temperature-sensitive elements, whose deformation process is slow and the time to cut off the circuit (i.e., trigger time) is uncontrollable. Often, the moving contact and the static contact have begun to melt before the circuit is cut off, and the purpose of overheating protection cannot be achieved. Since the trigger time is uncontrollable, the trigger temperature is also uncontrollable. Often, even when the preset trigger temperature is reached, it is necessary to wait for the bimetallic strip to complete the deformation process before the circuit can be cut off. At this time, the actual temperature may have far exceeded the preset trigger temperature, and the trigger temperature accuracy is too poor. As a result, it is impossible to achieve adjustable trigger time and compatibility with more application scenarios. Summary of the invention

[0005] In view of the above-mentioned defects, the purpose of the present invention is to provide a multi-limit temperature limiter with magnetic blowing and adjustable trigger time, which solves the arc problem of the temperature limiter and the problem of uncontrollable trigger time.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A multi-limit temperature controller with magnetic blow and adjustable trigger time, provided with at least two power-on circuits, each of which is provided with a contact group, and all the contact groups share a power-off mechanism, which is used to disconnect all the contact groups when the sensed temperature exceeds the trigger temperature;

[0008] The temperature sensing part of the power-off mechanism is stacked with at least two temperature sensing packages from top to bottom, the temperature sensing package at the top is used to sense the temperature, the temperature sensing packages are thermally connected, and movable connecting pieces are provided between the temperature sensing packages, and when one of the connecting pieces is opened from top to bottom, the triggering time is accelerated by one level, and the temperature sensing package at the bottom is used to trigger the action part of the power-off mechanism;

[0009] Each contact group is individually provided with a magnetic blowing mechanism and a conductive arc extinguishing mechanism, and the contact groups are respectively arranged in the magnetic field formed by the corresponding magnetic blowing mechanism. The magnetic blowing mechanism is used for magnetically blowing and drawing the arc to the conductive arc extinguishing mechanism when the contact group is disconnected and an arc is generated.

[0010] Furthermore, it comprises a temperature-sensing cover shell and a bottom shell; the temperature-sensing cover shell is covered on the notch of the bottom shell, the power-off mechanism, the magnetic blowing mechanism and the conductive arc-extinguishing mechanism are buckled and installed in the bottom shell, and the temperature-sensing cover shell is thermally connected to the temperature-sensing package located at the top;

[0011] The groove of the bottom shell is provided with equal number of partition columns according to the number of the power-carrying circuits, and two adjacent partition columns are semi-enclosed to form a circuit installation groove, and the power-carrying circuit is installed in the circuit installation groove;

[0012] The gaps between two adjacent partition columns merge at the center of the inner groove of the bottom shell to form a power-off active position; the action end of the power-off mechanism is arranged in the power-off active position and is movably connected to the contact group through the gaps between the two adjacent partition columns;

[0013] Each of the partition columns is equipped with a magnetic blowing mechanism, and the magnetic blowing mechanism is adjacent to the corresponding contact group; the conductive arc extinguishing mechanism is arranged on the slot wall of the bottom shell, and is adjacent to the corresponding contact group.

[0014] Furthermore, the power-off mechanism also includes a partition and an action rod; the top surface of the temperature-sensing package located at the top is made of temperature-sensitive material, which is in contact with the inner top surface of the temperature-sensing cover shell, the temperature-sensing packages share a heat-conducting sheet as an outer shell, and the bottom surface of the temperature-sensing package located at the bottom is made of a spring;

[0015] The partition is sealed and installed on the notch of the bottom shell, a power-off triggering slot is provided in the center of the top of the partition, the bottom end of the temperature-sensing package located at the bottom is fixed to the top surface of the partition, and the spring sheet seals the notch of the power-off triggering slot; an action rod through hole is provided in the center of the power-off triggering slot, the top end of the action rod passes through the action rod through hole and abuts against the bottom surface of the spring sheet, and the bottom of the action rod serves as the action end of the power-off mechanism;

[0016] A connecting port is provided in the center of the heat conducting sheet, a sealing portion of the connecting piece is provided in the temperature sensing package and can movably seal the connecting port, and an operating portion of the connecting piece sequentially passes through the side wall of the temperature sensing package and the side wall of the temperature sensing cover shell and extends to the outside of the temperature sensing cover shell.

[0017] Furthermore, it also includes a terminal group equal to the number of the energized circuits, and the terminal group includes a first terminal and a second terminal;

[0018] The power-on circuit includes a static contact and a dynamic contact; one end of the static contact passes through the bottom shell and is electrically connected to the first terminal, one end of the dynamic contact passes through the bottom shell and is electrically connected to the second terminal, the other end of the dynamic contact is folded and bent upwards and abuts against the bottom surface of the other end of the static contact, and the action end of the power-off mechanism abuts against the top surface of the other end of the dynamic contact;

[0019] When the temperature sensed by the power-off mechanism exceeds the trigger temperature, the action end of the power-off mechanism presses down the top surface of the other end of the moving contact, and the other end of the moving contact is separated from the bottom surface of the other end of the stationary contact;

[0020] The other end of the moving contact and the other end of the stationary contact form the contact point group.

[0021] Furthermore, the magnetic blowing mechanism is a magnet, and a magnet placement groove is provided at the other end of the partition column adjacent to the moving contact piece and the other end of the static contact piece, and the magnet is placed in the magnet placement groove.

[0022] Furthermore, the conductive arc-extinguishing mechanism includes an arc-extinguishing mounting part and a conductive part; one end of the arc-extinguishing mounting part is plugged and installed on the groove wall of the bottom shell, one end of the conductive part is plugged and installed on the other end of the arc-extinguishing mounting part, and the other end of the conductive part is adjacent to the corresponding contact group.

[0023] Furthermore, a downward pressure baffle is provided at the bottom of the groove of the bottom shell, and the downward pressure baffle is located below the other end of the movable contact.

[0024] Furthermore, a blocking limiter is provided at the outer edge of the communication port; when the blocking portion of the communication port is completely blocked by the blocking portion, the end of the blocking portion of the communication port abuts against the blocking limiter;

[0025] A fully open through hole is provided at the end of the operating part of the connecting piece, and a latch through hole is provided on the cover edge of the temperature-sensing cover shell corresponding to the fully open through hole; when the operating part of the connecting piece extends out of the temperature-sensing cover shell until the fully open through hole and the latch through hole are aligned, the connecting port is fully open.

[0026] Furthermore, the accommodation spaces filled with the temperature-sensitive medium in all the temperature-sensitive packages are exactly the same;

[0027] The top surface of the temperature-sensing package located at the top, the heat-conducting sheet and the temperature-sensing cover shell are all made of aluminum, and the spring sheet is made of stainless steel sheet.

[0028] Furthermore, the arc-extinguishing mounting portion is a ceramic component, and the conductive portion is made of a rigid conductive material.

[0029] The technical solution provided by the present invention may include the following beneficial effects: at least two power-on circuits are provided in the multi-limit temperature controller, and the power-on circuits are connected in series with the corresponding loads to control multiple loads simultaneously, and multiple power-on circuits are connected in parallel with the same load to control multiple power loads. Each power-on circuit is provided with a contact group, and all contact groups share a power-off mechanism, and at least two temperature-sensing bags are stacked from top to bottom in the temperature-sensing part of the power-off mechanism to replace the bimetallic strip with poor temperature-sensing performance and improve the temperature-sensing efficiency; on this basis, the temperature-sensing bag located at the top is used to sense the temperature, so that under the premise of thermal connection between the temperature-sensing bags, the sensed temperature needs to pass through multiple temperature-sensing bags to transfer the heat to the temperature-sensing bag located at the bottom to trigger the action part of the power-off mechanism, so that all contact groups are disconnected; therefore, each time a temperature-sensing bag passes through, it represents The trigger time is delayed by one level, and connecting pieces are provided between the temperature-sensing packages. When a connecting piece is opened from top to bottom, the temperature-sensing medium inside the previous temperature-sensing package will merge with the temperature-sensing medium inside the next temperature-sensing package to form a large temperature-sensing package. There is no need for temperature conduction through the heat-conducting connection between the temperature-sensing packages, which reduces the delay of one temperature-sensing package and speeds up the trigger time by one level. The trigger time of multiple temperature limiters can be adjusted through the activity of the connecting piece, making the trigger time adjustable, thereby ensuring stable and reliable power-off protection function in complex and changeable power consumption environments.

[0030] On the basis of the above structure, each contact group is individually provided with a magnetic blowing mechanism and a conductive arc extinguishing mechanism, so that the contact groups are respectively arranged in the magnetic field formed by the corresponding magnetic blowing mechanisms. When the contact groups are disconnected and an arc is generated, the arc is affected by the Lorentz force and the magnetic blowing is pulled to the conductive arc extinguishing mechanism. Under the dual effects of the magnetic blowing and pulling of the magnetic blowing mechanism and the conductive characteristics of the conductive arc extinguishing mechanism, the arc is received and eliminated in a directionally manner. Therefore, after multiple power-on circuits are provided inside the multi-limit thermostat, it is possible to ensure that the arc is eliminated within a limited space while avoiding hitting other components inside the multi-limit thermostat. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of a multi-limit temperature controller with magnetic blowing and adjustable trigger time in one embodiment of the present invention. Figure 1 .

[0032] Figure 2 Yes Figure 1 A top view of a partial structural schematic diagram of a multi-limit temperature controller with magnetic blowing and adjustable trigger time (the temperature sensing cover and temperature sensing package are omitted).

[0033] Figure 3 Yes Figure 1 A partial cross-sectional view of a multi-limit thermostat with magnetic blowing and adjustable trigger time is shown.

[0034] Figure 4 Yes Figure 1 The structure of a multi-limit temperature controller with magnetic blowing and adjustable trigger time is shown in FIG. Figure 2 .

[0035] Figure 5 Yes Figure 1 The figure shows a schematic diagram of the internal partial structure of a multi-limit thermostat with magnetic blowing and adjustable trigger time.

[0036] Among them: power-on circuit 1, contact group 2, power-off mechanism 3, temperature-sensing package 31, connecting piece 32, magnetic blowing mechanism 4, conductive arc extinguishing mechanism 5, temperature-sensing cover shell 6, bottom shell 7, partition column 71, circuit mounting groove 72, power-off active position 73, partition 33, action rod 34, power-off trigger groove 331, action rod through hole 332, connecting port 351, terminal group 8, first terminal 81, second terminal 82, static contact 11, moving contact 12, magnet placement groove 711, arc extinguishing mounting part 51, conductive part 52, downward pressure baffle 74, blocking limiter 3511, fully open through hole 321, and latch through hole 61. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe features, without distinction of order or importance.

[0039] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0041] Combine the following Figures 1 to 5 , describing a multi-limit thermostat with magnetic blowing and adjustable trigger time according to an embodiment of the present invention.

[0042] A multi-limit temperature controller with magnetic blowing and adjustable trigger time, provided with at least two power-on circuits 1, each power-on circuit 1 is provided with a contact group 2, all contact groups 2 share a power-off mechanism 3, and the power-off mechanism 3 is used to disconnect all contact groups 2 when the sensed temperature exceeds the trigger temperature;

[0043] The temperature sensing part of the power-off mechanism 3 is stacked with at least two temperature sensing packages 31 from top to bottom. The temperature sensing package 31 at the top is used to sense the temperature. The temperature sensing packages 31 are thermally connected to each other, and movable connecting pieces 32 are provided between the temperature sensing packages 31. When a connecting piece 32 is opened from top to bottom, the triggering time is accelerated by one level. The temperature sensing package at the bottom is used to trigger the action part of the power-off mechanism 3.

[0044] Each contact group 2 is individually provided with a magnetic blowing mechanism 4 and a conductive arc extinguishing mechanism 5. The contact groups 2 are respectively arranged in the magnetic field formed by the corresponding magnetic blowing mechanism 4. The magnetic blowing mechanism 4 is used for magnetically blowing and drawing the arc to the conductive arc extinguishing mechanism 5 when the contact group 2 is disconnected and an arc is generated.

[0045] Traditional multi-limit thermostats have obvious technical shortcomings in their design, especially in terms of arc and uncontrollable triggering time. There is an urgent need for a solution to improve the comprehensive performance of multi-limit thermostats, to achieve adjustable triggering time while eliminating arcs, and to ensure stable and reliable power-off protection in complex and changeable power usage environments.

[0046] The present invention proposes a preferred embodiment of a multi-limit temperature controller with magnetic blowing and adjustable trigger time, such as Figures 1 to 3 As shown, at least two power-on circuits 1 are provided in the multi-limit temperature controller. The power-on circuits 1 are connected in series with the corresponding loads to control multiple loads simultaneously, and multiple power-on circuits 1 are connected in parallel with the same load to control multiple power loads. Each power-on circuit 1 is provided with a contact group 2, and all contact groups 2 share a power-off mechanism 3. At least two temperature-sensing bags 31 are stacked from top to bottom in the temperature-sensing part of the power-off mechanism 3 to replace the bimetallic strip with poor temperature-sensing performance and improve the temperature-sensing efficiency. On this basis, the temperature-sensing bag 31 located at the top is used to sense the temperature. Therefore, under the premise of thermal connection between the temperature-sensing bags 31, the sensed temperature needs to pass through multiple temperature-sensing bags 31 to transfer the heat to the temperature-sensing bag 31 located at the bottom to trigger the action part of the power-off mechanism 3, so that all contact groups 2 are disconnected. Therefore, each time a temperature-sensing bag 31 passes through, the temperature of the contact group 2 is disconnected. It represents one level of trigger time delay, and a connecting piece 32 is provided between the temperature sensing packages 31. When a connecting piece 32 is opened from top to bottom, the temperature sensing medium inside the previous temperature sensing package 31 will merge with the temperature sensing medium inside the next temperature sensing package 31 to form a large temperature sensing package. There is no need to conduct temperature through the heat-conducting connection between the temperature sensing packages 31, thereby reducing the delay of one temperature sensing package 31 and speeding up the trigger time by one level. The trigger time of multiple limit thermostats can be adjusted through the activity of the connecting piece 32, making the trigger time adjustable, thereby ensuring a stable and reliable power-off protection function in a complex and changeable power usage environment.

[0047] On the basis of the above structure, each contact group 2 is individually provided with a magnetic blowing mechanism 4 and a conductive arc extinguishing mechanism 5, so that the contact groups 2 are respectively arranged in the magnetic field formed by the corresponding magnetic blowing mechanism 4. When the contact group 2 is disconnected and an arc is generated, the arc is affected by the Lorentz force and is magnetically blown to the conductive arc extinguishing mechanism 5. Under the dual effects of the magnetic blowing of the magnetic blowing mechanism 4 and the conductive characteristics of the conductive arc extinguishing mechanism 5, the arc is directionally received and eliminated. Therefore, after multiple power-on circuits 1 are provided inside the multi-limit thermostat, it is possible to ensure that the arc is eliminated within a limited space while avoiding hitting other components inside the multi-limit thermostat.

[0048] Furthermore, it includes a temperature sensing cover shell 6 and a bottom shell 7; the temperature sensing cover shell 6 is covered on the notch of the bottom shell 7, the power-off mechanism 3, the magnetic blowing mechanism 4 and the conductive arc extinguishing mechanism 5 are buckled and installed in the bottom shell 7, and the temperature sensing cover shell 6 is thermally connected to the temperature sensing package 31 located at the top;

[0049] The groove of the bottom shell 7 is provided with equal number of partition columns 71 according to the number of the power circuits 1, and the two adjacent partition columns 71 are semi-enclosed to form a circuit installation groove 72, and the power circuit 1 is installed in the circuit installation groove 72;

[0050] The gaps between two adjacent partition columns 71 merge at the center of the inner groove of the bottom shell 7 to form a power-off active position 73; the action end of the power-off mechanism 3 is arranged in the power-off active position 73, and is movably connected to the contact group 2 through the gaps between the two adjacent partition columns 71;

[0051] Each partition column 71 is equipped with a magnetic blowing mechanism 4 , and the magnetic blowing mechanism 4 is adjacent to the corresponding contact group 2 ; the conductive arc extinguishing mechanism 5 is arranged on the groove wall of the bottom shell 7 , and is adjacent to the corresponding contact group 2 .

[0052] In this embodiment, in order to realize the coordination relationship between the power-off mechanism 3, the magnetic blowing mechanism 4 and the conductive arc extinguishing mechanism 5 and the contact group 2, as shown in FIG. Figure 1 and 2 As shown, the shell of the multi-limit temperature controller is composed of a temperature-sensing cover shell 6 and a bottom shell 7. The temperature-sensing cover shell 6 is covered on the slot of the bottom shell 7, and the power-off mechanism 3, the magnetic blowing mechanism 4 and the conductive arc extinguishing mechanism 5 are installed in the shell. The temperature-sensing cover shell 6 is thermally connected to the temperature-sensing package 31 located at the top, so that the power-off mechanism 3 can sense the external temperature through the temperature-sensing cover shell 6.

[0053] Then, equal number of partition columns 71 are provided in the groove of the bottom shell 7 according to the number of the power-carrying circuits 1, and the circuit installation groove 72 is semi-enclosed by two adjacent partition columns 71, and the power-carrying circuit 1 is installed in the circuit installation groove 72; on this basis, the gap between the two adjacent partition columns 71 merges at the center of the inner groove of the bottom shell 7 to form a power-off active position 73, and the action end of the power-off mechanism 3 is set in the power-off active position 73, and is movably connected with the contact group 2 through the gap between the two adjacent partition columns 71, so that the power-off mechanism 3 can simultaneously control multiple contact groups to disconnect.

[0054] Finally, a magnetic blowing mechanism 4 is installed on each partition column 71, and the magnetic blowing mechanism 4 is adjacent to the corresponding contact group 2, and the conductive arc extinguishing mechanism 5 is arranged on the groove wall of the bottom shell 7 and is adjacent to the corresponding contact group 2, so that the magnetic blowing mechanism 4 and the conductive arc extinguishing mechanism 5 are relatively arranged on both sides of the contact group 2. When the magnetic blowing mechanism 4 blows the arc to the opposite side, the arc is easily attracted by the conductivity of the conductive arc extinguishing mechanism 5, and then the conductive arc extinguishing mechanism 5 receives and extinguishes the arc.

[0055] Furthermore, the power-off mechanism 3 further includes a partition 33 and an actuating rod 34; the top surface of the uppermost temperature-sensing package 31 is made of temperature-sensitive material, which is in contact with the inner top surface of the temperature-sensing cover shell 6; the temperature-sensing packages 31 share a heat-conducting sheet 35 as an outer shell; the bottom surface of the temperature-sensing package 31 at the bottom is made of a spring 36;

[0056] The partition 33 blocks the notch installed on the bottom shell 7, and a power-off triggering slot 331 is provided in the center of the top of the partition 33. The bottom end of the temperature-sensing package 31 located at the bottom is fixed to the top surface of the partition 33, and the spring 36 blocks the notch of the power-off triggering slot 331; an action rod through hole 332 is provided in the center of the power-off triggering slot 331, and the top end of the action rod 34 passes through the action rod through hole 332 and abuts against the bottom surface of the spring 36, and the bottom of the action rod 34 is used as the action end of the power-off mechanism 3;

[0057] A connecting port 351 is provided in the center of the heat conducting sheet 35 , and a sealing portion of the connecting piece 32 is provided in the temperature sensing package 31 and can movably seal the connecting port 351 . An operating portion of the connecting piece 32 sequentially passes through the side wall of the temperature sensing package 31 and the side wall of the temperature sensing cover shell 6 and extends to the outside of the temperature sensing cover shell 6 .

[0058] In this embodiment, the specific structure of the power-off mechanism 3 is as follows: Figure 3 As shown, the power-off mechanism 3 is composed of a temperature-sensing package 31, a connecting piece 32, a partition 33 and an actuating rod 34. The top surface of the temperature-sensing package 31 located at the top is made of temperature-sensitive material, which is in contact with the inner top surface of the temperature-sensing cover shell 6, and senses the external temperature through the temperature-sensing cover shell 6; the temperature-sensing packages 31 share a heat-conducting sheet 35 as an outer shell to achieve separation and heat transfer of the temperature-sensing packages 31, and at the same time play the role of delaying the previous temperature-sensing package 31 by one level to be sensed by the next temperature-sensing package 31; the bottom surface of the temperature-sensing package 31 located at the bottom is made of a spring sheet 36, so that when the temperature-sensing package 31 located at the bottom senses that the temperature exceeds the trigger temperature, the internal temperature-sensing medium expands, causing the spring sheet 36 to bulge downward and deform, pressing the top end of the actuating rod 34 to move downward through the actuating rod through hole 332, so that the bottom of the actuating rod 34 disconnects the contact group 2. More importantly, the bottom end of the action rod 34 can pass through the bottom of the bottom shell 7 and extend outside the bottom shell 7. When the spring piece 36 cannot be automatically reset, the user can press the bottom end of the action rod 34 outside the bottom shell 7 and use the top end of the action rod 34 to reset the spring piece 36.

[0059] Therefore, it is necessary to use a partition 33 to seal the slot installed on the bottom shell 7. A power-off trigger slot 331 is provided in the center of the top of the partition 33. The bottom end of the temperature-sensing package 31 located at the bottom is fixed to the top surface of the partition 33. The spring piece 36 seals the slot of the power-off trigger slot 331, so that the power-off trigger slot 331 and the spring piece 36 are surrounded to form a deformation space for the spring piece 36.

[0060] It should be noted that, in order to achieve adjustable trigger time, the power-off mechanism 3 is provided with a connecting port 351 in the center of the heat-conducting sheet 35, and the blocking portion of the connecting piece 32 is arranged in the temperature-sensing package 31. The blocking portion of the power-off mechanism 3 can movably block the connecting port 351, and the operating portion of the connecting piece 32 sequentially passes through the side wall of the temperature-sensing package 31 and the side wall of the temperature-sensing cover shell 6 and extends to the outside of the temperature-sensing cover shell 6, so that the user can adjust the trigger time by operating the operating portion of the connecting piece 32 outside the temperature-sensing cover shell 6, and the trigger time is accelerated by one level each time a connecting port 351 blocked by the connecting piece 32 is pulled open from top to bottom.

[0061] Furthermore, it also includes a terminal group 8 having the same number as the energized circuit 1, and the terminal group includes a first terminal 81 and a second terminal 82;

[0062] The power-on circuit 1 includes a static contact 11 and a dynamic contact 12; one end of the static contact 11 passes through the bottom shell 7 and is electrically connected to the first terminal 81, one end of the dynamic contact 12 passes through the bottom shell 7 and is electrically connected to the second terminal 82, the other end of the dynamic contact 12 is folded and bent upward to abut against the bottom surface of the other end of the static contact 11, and the action end of the power-off mechanism 3 abuts against the top surface of the other end of the dynamic contact 12;

[0063] When the power-off mechanism 3 senses that the temperature exceeds the trigger temperature, the action end of the power-off mechanism 3 presses down the top surface of the other end of the moving contact 12, and the other end of the moving contact 12 is separated from the bottom surface of the other end of the static contact 11;

[0064] The other end of the moving contact 12 and the other end of the stationary contact 11 form a contact point group 2 .

[0065] In this embodiment, the specific structure of the power supply circuit 1 is as follows: Figure 4 and 5 As shown, the energized circuit 1 is electrically connected to the first wiring terminal 81 and the second wiring terminal 82 respectively outside the bottom shell 7 through the static contact 11 and the moving contact 12 to facilitate external wiring.

[0066] Furthermore, the magnetic blowing mechanism 4 is a magnet, and a magnet placement groove 711 is provided at the other end of the partition column 71 adjacent to the moving contact 12 and the other end of the static contact 11 , and the magnet is placed in the magnet placement groove 711 .

[0067] In this embodiment, Figure 2 and 5As shown, based on the other end of the moving contact 12 and the other end of the stationary contact 11 being arranged relatively up and down to form a contact group 2, the direction of the separation to generate the arc is either upward or downward; therefore, the magnetic blowing mechanism 4 is a magnet, and a magnet placement groove 711 is provided on the partition column 71 adjacent to the other end of the moving contact 12 and the other end of the stationary contact 11 for placing the magnet, and the magnetic flux lines formed by the magnets themselves can be used to draw the arc to the conductive arc extinguishing mechanism 5 on the opposite side (the direction of the Lorentz force can be obtained to be towards the opposite side by the left-hand rule).

[0068] Furthermore, the conductive arc extinguishing mechanism 5 includes an arc extinguishing mounting portion 51 and a conductive portion 52; one end of the arc extinguishing mounting portion 51 is plugged and installed on the groove wall of the bottom shell 7, and one end of the conductive portion 52 is plugged and installed on the other end of the arc extinguishing mounting portion 51, and the other end of the conductive portion 52 is adjacent to the corresponding contact group 2.

[0069] In this embodiment, the arc extinguishing function of the conductive arc extinguishing mechanism 5 is realized by the arc extinguishing installation part 51, and the conductive function of the conductive arc extinguishing mechanism 5 is realized by the conductive part 52; one end of the arc extinguishing installation part 51 is plugged and installed on the groove wall of the bottom shell 7, and one end of the conductive part 52 is plugged and installed on the other end of the arc extinguishing installation part 51, and the other end of the conductive part 52 is adjacent to the corresponding contact group 2, so that the other end of the conductive part 52 receives the arc and conducts the current to one end of the conductive part 52, and the arc extinguishing installation part 51 eliminates the current. Figure 2 shown.

[0070] Furthermore, a downward pressure baffle 74 is provided at the bottom of the groove of the bottom shell 7 , and the downward pressure baffle 74 is located below the other end of the moving contact 12 .

[0071] In this embodiment, Figure 2 As shown, because the other end of the moving contact 12 is pressed by the bottom of the actuating rod 34 to separate from the other end of the static contact 11, the other end of the moving contact 12 may contact or conduct heat with the bottom of the groove of the bottom shell 7, and may accelerate the melting of the bottom of the groove of the bottom shell 7 under the pressure of the actuating rod 34, so a downward pressure baffle 74 is provided under the other end of the moving contact 12 to prevent the bottom of the groove of the shell bottom 7 from being melted; the downward pressure baffle 74 is preferably made of heat-insulating and insulating materials, such as ceramic materials.

[0072] Furthermore, a blocking stopper 3511 is provided at the outer edge of the communication port 351; when the blocking portion of the communication member 32 completely blocks the communication port 351, the end of the blocking portion of the communication member 32 abuts against the blocking stopper 3511;

[0073] A fully open through hole 321 is provided at the end of the operating part of the connecting piece 32, and a latch through hole 61 is provided on the cover edge of the temperature sensing cover shell 6 corresponding to the fully open through hole 321; when the operating part of the connecting piece 32 extends out of the temperature sensing cover shell 6 until the fully open through hole 321 and the latch through hole 61 are aligned, the connecting port 351 is fully open.

[0074] In this embodiment, Figure 3 As shown, a blocking limit piece 3511 is provided at the outer edge of the connecting port 351 to prevent the connecting piece 32 from being excessively extended and unable to be removed; a fully open through hole 321 is provided at the end of the operating portion of the connecting piece 32 to help the user know whether the connecting port 351 is fully open, so as to avoid continuing to pull out the connecting piece 32 after it is fully opened, thereby causing leakage of the internal temperature sensing medium of the temperature sensing package 31; at the same time, a latch through hole 61 is provided on the cover eave of the temperature sensing cover shell 6 corresponding to the fully open through hole 321, and the connecting piece 32 can be fixed by using a latch piece to pass through the fully open through hole 321 and the latch through hole 61 to prevent the connecting piece 32 from shifting after the trigger time of the multi-limit temperature controller is adjusted.

[0075] Furthermore, the accommodation spaces filled with the temperature-sensing medium in all the temperature-sensing packages 31 are exactly the same;

[0076] The top surface of the uppermost temperature-sensing package 31 , the heat-conducting sheet 35 and the temperature-sensing cover shell 6 are all made of aluminum, and the spring sheet 36 is made of a stainless steel sheet.

[0077] In this embodiment, the storage space filled with the temperature-sensitive medium in all temperature-sensitive packages 31 is exactly the same, which can reduce the variables affecting the trigger time adjustment and ensure that the delay time or acceleration time of each level is the same. More importantly, by changing the material of the temperature-sensitive medium, the delay time or acceleration time of each level can be changed. For example, if you want to shorten the time interval of each level, the temperature-sensitive medium can be kerosene, which has a large expansion coefficient and high thermal conductivity, and can transfer heat faster.

[0078] In order to further ensure that the adjustable trigger time mechanism composed of multiple temperature-sensing packages 31 can be smoothly implemented, the top surface of the uppermost temperature-sensing package 31, the heat-conducting sheet 35 and the temperature-sensing cover shell 6 are preferably made of aluminum, which has high thermal conductivity, so as to quickly sense the external temperature and conduct the temperature; the spring sheet 36 is preferably made of stainless steel sheet, which is corrosion-resistant, compatible with more temperature-sensing media, and has good elasticity and is easily deformed by the expansion of the temperature-sensing medium.

[0079] Furthermore, the arc extinguishing mounting portion 51 is a ceramic component, and the conductive portion 52 is made of a rigid conductive material.

[0080] In this embodiment, based on the excellent insulation properties of ceramic materials, they can extinguish arcs, so the arc extinguishing mounting portion 51 is made of ceramic material. In addition, due to the excellent high temperature resistance of ceramic materials, the arc extinguishing mounting portion 51 is not easily burned by electric current, which greatly extends its service life.

[0081] Because the conductive part 52 mainly performs the function of conducting electricity and it is necessary to ensure that the conductive part 52 is always adjacent to the contact group 2 (ie, not easily deformed), the conductive part 52 is preferably made of a rigid conductive material, such as a copper alloy.

[0082] Other structures and operations of a multi-limit temperature controller with magnetic blowing and adjustable trigger time according to an embodiment of the present invention are well known to ordinary technicians in the field and will not be described in detail here.

[0083] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-limit thermostat with magnetic blowing and adjustable trigger time, characterized in that: At least two power-on circuits are provided, each of which is provided with a contact group, and all the contact groups share a power-off mechanism, which is used to disconnect all the contact groups when the sensed temperature exceeds the trigger temperature; The temperature sensing part of the power-off mechanism is stacked with at least two temperature sensing packages from top to bottom, the temperature sensing package at the top is used to sense the temperature, the temperature sensing packages are thermally connected, and movable connecting pieces are provided between the temperature sensing packages, and when one of the connecting pieces is opened from top to bottom, the trigger time is accelerated by one level, and the temperature sensing package at the bottom is used to trigger the action part of the power-off mechanism; Each of the contact groups is independently provided with a magnetic blowing mechanism and a conductive arc extinguishing mechanism, and the contact groups are respectively arranged in the magnetic field formed by the corresponding magnetic blowing mechanism, and the magnetic blowing mechanism is used for magnetically blowing and drawing the arc to the conductive arc extinguishing mechanism when the contact group is disconnected and an arc is generated; It comprises a temperature-sensing cover shell and a bottom shell; the temperature-sensing cover shell is covered on the notch of the bottom shell, the power-off mechanism, the magnetic blowing mechanism and the conductive arc-extinguishing mechanism are buckled and installed in the bottom shell, and the temperature-sensing cover shell is thermally connected with the temperature-sensing package located at the top; The power-off mechanism also includes a partition and an action rod; the top surface of the temperature-sensing package located at the top is made of temperature-sensitive material, which is in contact with the inner top surface of the temperature-sensing cover shell; the temperature-sensing packages share a heat-conducting sheet as an outer shell, and the bottom surface of the temperature-sensing package located at the bottom is made of a spring; The partition is sealed and installed on the notch of the bottom shell, a power-off triggering slot is provided in the center of the top of the partition, the bottom end of the temperature-sensing package located at the bottom is fixed to the top surface of the partition, and the spring sheet seals the notch of the power-off triggering slot; an action rod through hole is provided in the center of the power-off triggering slot, the top end of the action rod passes through the action rod through hole and abuts against the bottom surface of the spring sheet, and the bottom of the action rod serves as the action end of the power-off mechanism; A connecting port is provided in the center of the heat conducting sheet, a sealing portion of the connecting piece is provided in the temperature sensing package and can movably seal the connecting port, and an operating portion of the connecting piece sequentially passes through the side wall of the temperature sensing package and the side wall of the temperature sensing cover shell and extends to the outside of the temperature sensing cover shell.

2. A multi-limit temperature controller with magnetic blowing and adjustable trigger time according to claim 1, characterized in that: The groove of the bottom shell is provided with equal number of partition columns according to the number of the power-carrying circuits, and two adjacent partition columns are semi-enclosed to form a circuit installation groove, and the power-carrying circuit is installed in the circuit installation groove; The gaps between two adjacent partition columns merge at the center of the inner groove of the bottom shell to form a power-off active position; the action end of the power-off mechanism is arranged in the power-off active position and is movably connected to the contact group through the gaps between the two adjacent partition columns; Each of the partition columns is equipped with a magnetic blowing mechanism, and the magnetic blowing mechanism is adjacent to the corresponding contact group; the conductive arc extinguishing mechanism is arranged on the slot wall of the bottom shell, and is adjacent to the corresponding contact group.

3. A multi-limit temperature controller with magnetic blowing and adjustable trigger time according to claim 2, characterized in that: It also includes a terminal group equal to the number of the energized circuits, the terminal group including a first terminal and a second terminal; The power-on circuit includes a static contact and a dynamic contact; one end of the static contact passes through the bottom shell and is electrically connected to the first terminal, one end of the dynamic contact passes through the bottom shell and is electrically connected to the second terminal, the other end of the dynamic contact is folded and bent upwards and abuts against the bottom surface of the other end of the static contact, and the action end of the power-off mechanism abuts against the top surface of the other end of the dynamic contact; When the temperature sensed by the power-off mechanism exceeds the trigger temperature, the action end of the power-off mechanism presses down the top surface of the other end of the moving contact, and the other end of the moving contact is separated from the bottom surface of the other end of the stationary contact; The other end of the moving contact and the other end of the stationary contact form the contact point group.

4. A multi-limit temperature controller with magnetic blowing and adjustable trigger time according to claim 3, characterized in that: The magnetic blowing mechanism is a magnet, and the other end of the partition column adjacent to the moving contact piece and the other end of the static contact piece are provided with a magnet placement groove, and the magnet is placed in the magnet placement groove.

5. The multi-limit temperature controller with magnetic blowing and adjustable trigger time according to claim 2, characterized in that: The conductive arc-extinguishing mechanism includes an arc-extinguishing mounting part and a conductive part; one end of the arc-extinguishing mounting part is plugged and installed on the slot wall of the bottom shell, one end of the conductive part is plugged and installed on the other end of the arc-extinguishing mounting part, and the other end of the conductive part is adjacent to the corresponding contact group.

6. The multi-limit temperature controller with magnetic blowing and adjustable trigger time according to claim 3, characterized in that: A downward pressing baffle is provided at the bottom of the groove of the bottom shell, and the downward pressing baffle is located below the other end of the moving contact.

7. The multi-limit temperature controller with magnetic blowing and adjustable trigger time according to claim 1, characterized in that: The outer edge of the communication port is provided with a blocking limiter; when the blocking portion of the communication port completely blocks the communication port, the end of the blocking portion of the communication port abuts against the blocking limiter; A fully open through hole is provided at the end of the operating part of the connecting piece, and a latch through hole is provided on the cover edge of the temperature-sensing cover shell corresponding to the fully open through hole; when the operating part of the connecting piece extends out of the temperature-sensing cover shell until the fully open through hole and the latch through hole are aligned, the connecting port is fully open.

8. The multi-limit temperature controller with magnetic blowing and adjustable trigger time according to claim 1, characterized in that: The accommodation spaces filled with temperature-sensitive medium in all the temperature-sensitive packages are exactly the same; The top surface of the temperature-sensing package located at the top, the heat-conducting sheet and the temperature-sensing cover shell are all made of aluminum, and the spring sheet is made of stainless steel sheet.

9. The multi-limit temperature controller with magnetic blowing and adjustable trigger time according to claim 5, characterized in that: The arc extinguishing mounting part is a ceramic part, and the conductive part is made of a rigid conductive material.

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