CN116631691A - Power line capable of being protected by temperature sensing and air conditioner - Google Patents

Abstract

The invention relates to the technical field of power lines, in particular to a power line capable of being subjected to temperature sensing protection and an air conditioner, wherein the power line comprises a wire core, a temperature sensing device, a conductive loop and an on-off detection mechanism, the temperature sensing device comprises a gasification piece, the gasification piece is positioned at the wire core and is gasified when the temperature on the wire core reaches a set value, so that the conductive loop is disconnected; the on-off detection mechanism is used for detecting the on-off of the conductive loop. Compared with the prior temperature sensing materials such as a thermistor, a PTC resistor and the like, which have inaccurate temperature measurement caused by the change of the resistance value along with the time extension, the temperature sensing material adopts the gasification part such as a thermosensitive pill and the like, when the temperature on the wire core is increased to the set temperature, the gasification part is gradually ablated until the wire core is completely gasified, the process does not need to carry out resistance value test and conversion temperature, the problem of resistance value change caused by material aging is not needed, and the on-off detection mechanism can judge whether the temperature of the power wire is abnormally increased only by detecting the on-off of the conductive loop, so that the detection is more accurate.

Description

Power line capable of being protected by temperature sensing and air conditioner

Technical Field

The invention relates to the technical field of power lines, in particular to a temperature-sensing protective power line and an air conditioner.

Background

After years of after-sales fault statistical analysis, the main reasons for the damage of the power line are that the power line is locally pressed in the installation or use process, or a mouse bites the insulating layer, or the insulating layer quality problem caused by the manufacturing process of the power line is generated, and the final reflection of the power line fault is that the insulating layer is damaged due to local heating, so that the power line is short-circuited and ignited.

At present, temperature sensing materials such as a thermistor, a PTC resistor and the like are generally adopted to detect the temperature of a power line, the resistance value of the temperature sensing material correspondingly changes along with the change of the temperature on the power line, and the temperature on the power line can be monitored by testing the resistance value of the temperature sensing material and converting the resistance value into the temperature. The defects of the schemes are that the resistance values of the temperature sensing materials such as the thermistor, the PTC resistor and the like can change along with the extension of the service time of the power line, so that the temperature measurement is inaccurate due to abnormal sampling and testing of the resistance values of the temperature sensing materials when the temperature on the power line is abnormally increased, and the situation needs to be solved.

Disclosure of Invention

In view of the above, the present invention provides a temperature-sensitive protective power line, which mainly solves the following technical problems: how to improve the detection accuracy of abnormal temperature rise of the power line.

In order to achieve the above purpose, the present invention mainly provides the following technical solutions:

in a first aspect, an embodiment of the present invention provides a power line capable of temperature-sensing protection, which includes a wire core, a temperature sensing device, a conductive loop, and an on-off detection mechanism, where the temperature sensing device includes a gasification member, and the gasification member is located at the wire core, so that gasification occurs when a temperature on the wire core reaches a set value, and the conductive loop is disconnected; the on-off detection mechanism is used for detecting the on-off of the conductive loop.

In some embodiments, the temperature sensing device further comprises a first conductive element, a second conductive element and an elastic element, and the temperature sensing device is electrically connected between two conductive nodes of the conductive loop through the first conductive element and the second conductive element so as to be connected in series on the conductive loop;

the first conductive piece is movable, the temperature sensing device is provided with a first state and a second state, the gasification piece is in a solid state in the first state, and the gasification piece stops the first conductive piece so that the first conductive piece contacts with the second conductive piece to conduct the two conductive nodes; and in the second state, the gasification part is gasified, and the elastic part pushes the first conductive part to be separated from the second conductive part so as to break the electrical connection between the two conductive nodes.

In some embodiments, the temperature sensing device further comprises a conductive shell and an insulating end cover, wherein the insulating end cover is used for covering the conductive shell, a containing cavity is formed between the conductive shell and the insulating end cover, and the gasification piece, the first conductive piece and the elastic piece are all arranged in the containing cavity;

the first conductive piece is in sliding fit with the side wall of the conductive shell, and is electrically connected with the conductive shell; the first conductive piece is electrically connected with one of the two conductive nodes through the conductive shell; the second conductive piece is used for penetrating through the insulating end cover, and the second conductive piece and the insulating end cover are kept relatively fixed; the second conductive piece is contacted with the first conductive piece through one end of the second conductive piece extending into the accommodating cavity, and the second conductive piece is electrically connected with the other one of the two conductive nodes through the other end of the second conductive piece.

In some embodiments, the electrically conductive housing is a thermally conductive member, and the vaporization member is in contact with the wire core through the electrically conductive housing.

In some embodiments, the conductive loop has a conductive wire connected in series within the loop, the conductive wire extending along a length of the wire core, and the temperature sensing device is disposed on the conductive wire so as to be connected in series within the conductive loop through the conductive wire.

In some embodiments, the conductive wire is wound on the wire core.

In some embodiments, the temperature-sensitive protective power line further comprises an insulating sheath, the insulating sheath is sleeved on the wire core, and the conductive wire is located in the insulating sheath.

In some embodiments, the temperature-protectable power cord further includes a disconnect mechanism for disconnecting the power cord and the hot wire within the core when the conductive loop is disconnected.

In some embodiments, the disconnect mechanism includes a controller and a disconnect that is serially connected to the power cord fire wire; the disconnecting mechanism is used for controlling the disconnecting piece through the controller when the conductive loop is disconnected, so that the disconnecting piece is disconnected to disconnect the power line and the live wire in the wire core.

In some embodiments, the on-off detection mechanism is used for generating a disconnection signal when the conductive loop is detected to be disconnected, and the controller controls the disconnection piece to be disconnected according to the disconnection signal;

and/or, the disconnecting piece is a relay or a release.

In some embodiments, the power cord has a power cord plug connected to the cord core, and the disconnect mechanism and the on-off detection mechanism are both disposed within the power cord plug.

In a second aspect, an embodiment of the present invention further provides an air conditioner, which may include any one of the above-mentioned temperature-protectable power lines.

By means of the technical scheme, the temperature-sensitive protective power line has the following beneficial effects:

1. compared with the prior temperature sensing materials such as a thermistor, a PTC resistor and the like, which have inaccurate temperature measurement caused by the change of the resistance value along with the time extension, the temperature sensing material adopts the gasification part such as a thermosensitive pill and the like, when the temperature on the wire core is increased to the set temperature, the gasification part is gradually ablated until the wire core is completely gasified, the process does not need to carry out resistance value test and conversion temperature, the problem of resistance value change caused by material aging is not needed to be worried, and the on-off detection mechanism can judge whether the temperature of the power wire is abnormally increased only by detecting the on-off of the conductive loop, so that the detection is more accurate;

2. when the temperature on the wire core is abnormally increased, the solid gasification part is gasified and ablated, the temperature sensing device is disconnected, and the conductive loop is disconnected. The on-off detection mechanism generates a disconnection signal when detecting that the conductive loop is disconnected, and a controller arranged in the power line plug, such as a control panel, can receive the disconnection signal to control a disconnection piece, such as a relay or a release to disconnect, so as to cut off a power supply in time, thereby achieving the effect of protecting the power line.

The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a temperature-sensitive power line according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a temperature sensing device connected between two conductive nodes of a conductive loop when a vaporization member is in a solid state;

FIG. 3 is a schematic diagram of a temperature sensing device connected between two conductive nodes of a conductive loop after vaporization of a vaporization member;

fig. 4 is a flow control diagram for controlling the disconnection of the live wire of the power line when the conduction is disconnected.

Reference numerals: 1. a power cord plug; 2. a wire core; 3. a conductive wire; 4. a temperature sensing device; 5. an insulating sheath; 6. a controller; 7. a conductive loop; 8. a conductive lead; 9. a second conductive member; 10. a conductive housing; 11. a gasification member; 12. a first conductive member; 13. an elastic member; 14. an insulating end cap; 15. an on-off detection mechanism; 16. a disconnect; 21. a power line and a ground line; 22. a power line zero line; 23. a power line and a live wire; 31. a first conductive node; 32. a second conductive node; 141. the accommodating cavity.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

After years of after-sale fault statistical analysis, the main reasons for the damage of the power line are that the power line is locally pressed, a mouse bites the insulating layer or the insulating layer quality problem caused by the manufacturing process of the power line is caused in the installation or use process, and the final reflection of the power line fault is that the local heating causes the damage of the insulating layer at the position, so that the power line is in short circuit and fire striking. According to the above reasons, a group of temperature sensing devices for sensing temperature can be added in the power line, which can more accurately sense the temperature change condition of each point where the temperature sensing devices are positioned, and perform so-called 'insulating layer protection'. The temperature condition of the insulating layer of the whole power line is monitored at the moment, and once the temperature abnormality at a certain position is found, the power supply is immediately cut off for protection so as to avoid malignant accidents.

At present, temperature sensing materials such as a thermistor, a PTC resistor and the like are generally adopted to detect the temperature of a power line, the resistance value of the temperature sensing material correspondingly changes along with the change of the temperature on the power line, and the temperature on the power line can be monitored by testing the resistance value of the temperature sensing material and converting the resistance value into the temperature. The defects of the schemes are that the resistance values of the temperature sensing materials such as the thermistor, the PTC resistor and the like can change along with the extension of the service time of the power line, so that the temperature measurement is inaccurate due to abnormal sampling and testing of the resistance values of the temperature sensing materials when the temperature on the power line is abnormally increased.

In view of the above, the present invention is directed to a power line capable of temperature sensing protection, so as to improve the detection accuracy of abnormal temperature rise of the power line.

As shown in fig. 1 and fig. 4, a power line capable of temperature sensing protection according to an embodiment of the present invention includes a wire core 2, a temperature sensing device 4, a conductive loop 7 and an on-off detection mechanism 15. The core 2 may be composed of a plurality of wires. In one specific example of application, the core 2 includes a power cord ground 21, a power cord hot 23, and a power cord neutral 22. The outer surfaces of the power line ground wire 21, the power line live wire 23 and the power line zero wire 22 are respectively wrapped with an insulating layer. The structures of the power line ground wire 21, the power line live wire 23 and the power line neutral wire 22 are all in the prior art, and are not described herein.

As shown in fig. 2 and 3, the temperature sensing device 4 includes a vaporizing element 11, the vaporizing element 11 is in a solid state at normal temperature, and when the temperature rises to a set temperature, the vaporizing element 11 is gradually ablated until complete vaporization. The vaporizing member 11 may be a thermosensitive pellet or a thermosensitive pellet-like substance or the like. The gasification member 11 may be a commercially available member, and its specific structure is a prior art and will not be described herein.

The aforementioned vaporization member 11 is located at the wire core 2 to sense the temperature on the wire core 2 in real time. The gasification member 11 should be arranged as close to the wire core 2 as possible. If possible, the gasification member 11 should be disposed closely to the wire core 2, so that heat on the wire core 2 can be rapidly transferred to the gasification member 11, so as to improve the sensing effect of the gasification member 11 on the temperature on the wire core 2.

The vaporization member 11 is used for vaporization when the temperature on the wire core 2 reaches a set value, so as to break the conductive loop 7. The on-off detection mechanism 15 is used for detecting the on-off of the conductive loop 7. Here, the "set value" is a gasification temperature value of the gasification tool 11, and the gasification tool 11 is gasified at the set value. Specifically, the temperature of the power line on the wire core 2 is lower than the set value in the non-conductive non-working state or in the conductive normal working state, and the gasification member 11 is in a solid state. When the power line is damaged to cause short circuit ignition, the temperature on the wire core 2 can be rapidly increased, and at the moment, the temperature on the wire core 2 is larger than the set value, and as the gasification piece 11 is arranged close to the wire core 2, the high temperature on the wire core 2 can be transmitted to the gasification piece 11, so that the gasification piece 11 is gradually ablated until complete gasification, and the conductive loop 7 can be disconnected after the gasification piece 11 is gasified.

The on-off detection mechanism 15 keeps detecting the conductive loop 7 at all times, and when the on-off detection mechanism 15 detects that the conductive loop 7 is disconnected, that is, the abnormal temperature rise on the power line is indicated to be damaged, the on-off detection mechanism 15 can send a signal to alarm or cut off the power line, and the purpose of protecting the power line is achieved.

Compared with the prior temperature sensing materials such as a thermistor, a PTC resistor and the like, which have inaccurate temperature measurement caused by the change of the resistance value along with the time extension, the temperature sensing material adopts the gasification part 11 such as a thermosensitive pill and the like, when the temperature on the wire core 2 is increased to the set temperature, the gasification part 11 is gradually ablated until the temperature is completely gasified, and the process does not need to carry out resistance value test and conversion temperature, so that external resistance value detection equipment is not required to be connected, and the problem of resistance value change caused by material aging is also not required, and the on-off detection mechanism 15 can judge whether the temperature of the power wire is abnormally increased only by detecting the on-off of the conductive loop 7, so that the detection is more accurate.

In order to implement the function of the temperature sensing device 4, the gasification member 11 can break the conductive loop 7 when gasification occurs, as shown in fig. 2 and 3, the temperature sensing device 4 may include a first conductive member 12, a second conductive member 9, and an elastic member 13, where the elastic member 13 may be a spring or a flexible plastic, etc. The temperature sensing device 4 is electrically connected between two conductive nodes of the conductive loop 7 through the first conductive member 12 and the second conductive member 9 so as to be connected in series on the conductive loop 7. The two conductive nodes may be two connection terminals or connection plugs on the conductive loop 7. The two conductive nodes may be a first conductive node 31 and a second conductive node 32, respectively, both the first conductive node 31 and the second conductive node 32 forming a conductive node group. The temperature sensing device 4 is electrically connected with the first conductive node 31 through the first conductive member 12, and the temperature sensing device 4 is also electrically connected with the second conductive node 32 through the second conductive member 9, so that the temperature sensing device 4 can be connected in series with the conductive loop 7 through the connection with the first conductive node 31 and the second conductive node 32.

The first conductive element 12 is movable, and the temperature sensing device 4 has a first state and a second state, in the first state, as shown in fig. 2, the vaporizing element 11 is in a solid state, and the vaporizing element 11 stops the first conductive element 12, so that the first conductive element 12 contacts with the second conductive element 9 to conduct two conductive nodes, and at this time, the first conductive node 31, the first conductive element 12, the second conductive element 9 and the second conductive node 32 are sequentially connected and conducted. In the second state, as shown in fig. 3, the vaporizing element 11 is vaporized, and the elastic element 13 pushes the first conductive element 12 to be separated from the second conductive element 9, so as to break the electrical connection between the two conductive nodes.

In the above example, the first conductive element 12 corresponds to a moving switch, and in the first state, the solid vaporization element 11 stops the first conductive element 12 at a position where it contacts the second conductive element 9 to conduct electricity, and in the second state, the elastic element 13 pushes the first conductive element 12 to separate from the second conductive element 9. The elastic piece 13 is matched with the gasification piece 11, so that the first conductive piece 12 and the second conductive piece 9 can be contacted or automatically separated, and the on-off of the conductive loop 7 can be automatically controlled.

Since the first conductive element 12 and the second conductive element 9 are respectively connected to the two conductive nodes, as shown in fig. 2, the first conductive element 12 and the second conductive element 9 can be in contact with each other to conduct the first conductive node 31 and the second conductive node 32, so that the conductive loop 7 is conducted. As shown in fig. 3, when the first conductive member 12 is separated from the second conductive member 9, the electrical connection between the first conductive node 31 and the second conductive node 32 may be disconnected, so that the conductive loop 7 is disconnected.

As shown in fig. 2 and 3, the aforementioned temperature sensing device 4 may further include a conductive housing 10 and an insulating end cap 14. The insulating end cap 14 is used to cover the conductive housing 10, and forms a receiving cavity 141 therebetween. The insulating end cap 14 may be an injection molded closure or the like. In one specific application example, the conductive housing 10 may be barrel-shaped, with the interior of the conductive housing 10 being hollow and open at one end. An insulating end cap 14 covers the port of the conductive housing 10. Wherein the insulating end cap 14 may be snapped or screwed onto the conductive housing 10.

The gasification member 11, the first conductive member 12 and the elastic member 13 are all disposed in the accommodating cavity 141, so that the space of the accommodating cavity 141 can be fully utilized, and the overall structure of the temperature sensing device 4 is more compact. Wherein, the gasification member 11 and the first conductive member 12 may be both located in the conductive housing 10, the inner side of the insulating end cover 14 may have a groove, the elastic member 13 is located in the groove of the insulating end cover 14, one end of the elastic member 13 abuts against the bottom surface of the groove, and the other end of the elastic member 13 abuts against one side of the first conductive member 12 facing away from the gasification member 11. The vaporization member 11 may be located on a side of the first conductive member 12 facing away from the elastic member 13.

The first conductive member 12 is slidably engaged with the side wall of the conductive housing 10, and the first conductive member 12 is electrically connected to the conductive housing 10. Specifically, as shown in fig. 2 and 3, the first conductive member 12 is held in contact with the conductive housing 10, enabling the first conductive member 12 to remain electrically connected to the conductive housing 10. The first conductive member 12 is electrically connected to one of the two conductive nodes through the conductive housing 10, and specifically, the first conductive member 12 is electrically connected to the first conductive node 31 through the conductive housing 10. The conductive housing 10 may be a metal housing, etc., and the conductive housing 10 may be electrically connected with the conductive lead 8, and the conductive lead 8 may be welded on the conductive housing 10. The conductive housing 10 is electrically connected, such as soldered or plugged, to the first conductive node 31 via the conductive lead 8.

As shown in fig. 2 and 3, the aforementioned second conductive member 9 is configured to pass through the insulating end cap 14, and the second conductive member 9 and the insulating end cap 14 remain relatively fixed. The second conductive element 9 may be snapped onto the insulating end cap 14. Wherein the second conductive member 9 is in contact with the first conductive member 12 through one end thereof protruding into the receiving cavity 141, and the second conductive member 9 is electrically connected to the other of the two conductive nodes through the other end thereof. Specifically, the second conductive member 9 is electrically connected to the aforementioned second conductive node 32 through the other end thereof. The second conductive member 9 may be a conductive lead 8 or the like. In order to improve the contact stability between the second conductive member 9 and the first conductive member 12, the second conductive member 9 may be a metal rod or the like. When the elastic member 13 is a compression spring, one end of the second conductive member 9 extending into the accommodating cavity 141 may extend into the inner hole of the compression spring.

In the above example, the first conductive member 12 may be a conductive barrier, such as a metal plate or the like. The first conductive element 12 may have a shape consistent with the inner cavity of the conductive housing 10, and when the gasification element 11 is gasified, the elastic element 13 may push the first conductive element 12 to move along the inner wall of the conductive housing 10, and the inner cavity of the conductive housing 10 has the effect of guiding and limiting the first conductive element 12. Wherein the first conductive member 12 is a movable member, and the second conductive member 9 is a fixed member. The gasification member 11 is matched with the elastic member 13, so that the first conductive member 12 is positioned at different positions, and the first conductive member 12 is contacted with or separated from the second conductive member 9, thereby achieving the purpose of switching on or switching off the conductive loop 7.

The accommodating cavity 141 formed between the conductive housing 10 and the insulating end cover 14 may be a sealed cavity, and the gas formed by gasifying the gasifying element 11 may be enclosed in the accommodating cavity 141, so that an additional exhaust structure is not required to exhaust, thereby having the advantages of simplifying the structure and reducing the cost.

The foregoing conductive housing 10 is a heat conductive member, and preferably, the conductive housing 10 may be a metal member, and the metal member may be conductive, or conductive. The vaporizing member 11 is filled inside the conductive housing 10, and the vaporizing member 11 is in close contact with the inner wall of the conductive housing 10. The gasification member 11 can be in contact with the wire core 2 through the conductive shell 10 to improve heat transfer efficiency on the wire core 2, so that heat on the wire core 2 can be quickly transferred to the gasification member 11, and the sensing capability of the gasification member 11 on high temperature on the wire core 2 is improved.

In order to more accurately and timely sense the abnormal high temperature on the wire core 2, as shown in fig. 1, the number of the temperature sensing devices 4 may be more than two, and the temperature sensing devices may be sequentially arranged at intervals along the length direction of the wire core 2. The number of the conductive node groups is equal to that of the temperature sensing devices 4 and corresponds to one.

Preferably, each temperature sensing device 4 may be connected in series on the same conductive line within the conductive loop 7. In a specific application example, the number of the temperature sensing devices 4 is 7, and the distance between every two adjacent temperature sensing devices 4 is 0.1 meter.

As shown in fig. 1, the aforementioned conductive loop 7 has a conductive wire 3 connected in series in the loop, the conductive wire 3 extends along the length direction of the wire core 2, and the aforementioned temperature sensing device 4 is disposed on the conductive wire 3 so as to be connected in series in the conductive loop 7 through the conductive wire 3. Wherein the conductive wire 3 may be arranged side by side with the wire core 2. Preferably, the conductive wire 3 can be wound on the wire core 2, and the conductive wire 3 can drive the temperature sensing device 4 thereon to be in close contact with the wire core 2, so that the gasification member 11 is in close proximity to the wire core 2, the heat on the wire core 2 is more efficiently transferred to the gasification member 11, and the gasification member 11 can timely sense the abnormal temperature rise phenomenon on the wire core 2.

As shown in fig. 1, the temperature-sensitive protective power cord may further include an insulating sheath 5, where the insulating sheath 5 is sleeved on the core 2, and the conductive cord 3 is located in the insulating sheath 5. Wherein, insulating sheath 5 can provide the casing protection for the power cord to insulating sheath 5 can oppress temperature sensing device 4 and sinle silk 2 on the electric wire 3, makes temperature sensing device 4 and sinle silk 2 closely laminate together, is favorable to on the sinle silk 2 heat more high-efficient transfer to the gasification piece 11 of temperature sensing device 4 like this, makes gasification piece 11 can in time perception the unusual rise phenomenon of temperature on the sinle silk 2.

What needs to be explained here is: as shown in fig. 1, the core 2 may include a power line live wire 23, a power line neutral wire 22, and a power line ground wire 21, and the insulating sheath 5 is arranged to cover the power line live wire 23, the power line neutral wire 22, the power line ground wire 21, and the conductive wire 3. The structures of the power line live wire 23, the power line zero wire 22 and the power line ground wire 21 are all of the prior art, and the outer sides of the power line live wire 23, the power line zero wire 22 and the power line ground wire 21 are respectively and independently sleeved with insulating layers. Similarly, an insulating layer is also provided on the outer side of the conductive wire 3. The insulating sheath 5 is arranged inside the power line/live wire 23, the power line/neutral wire 22, the power line/ground wire 21 and the conductive wire 3, which are all sleeved with insulating layers.

The aforementioned temperature-sensitive protective power line may further comprise a disconnection mechanism for disconnecting the power line and live wire 23 in the wire core 2 when the conductive loop 7 is disconnected, so as to cut off the power and achieve the effect of protecting the power line.

In order to realize the function of the disconnecting mechanism, the disconnecting mechanism can disconnect the power line and the live wire 23 in the wire core 2 when the conductive loop 7 is disconnected, and as shown in fig. 4, the disconnecting mechanism can comprise a controller 6 and a disconnecting piece 16, and the disconnecting piece 16 is connected in series with the power line and the live wire 23. The breaking mechanism is used for controlling the breaking member 16 through the controller 6 when the conductive loop 7 is broken, so that the breaking member 16 is broken to break the power line and the live wire 23 in the wire core 2. The controller 6 may be a control board, etc., and the disconnecting member 16 may be a relay or a release, etc.

The on-off detection mechanism 15 is used for generating an off signal when the conductive loop 7 is detected to be off, and the controller 6 controls the off piece 16 to be off according to the off signal. Thus, when the temperature on the power line is abnormally increased, the automatic disconnection of the power line and live wire 23 can be realized, and the protection effect on the power line is better.

What needs to be explained here is: the on-off detection mechanism 15 may be an on-off detection circuit integrated on the control board, and the on-off detection circuit is a mature general technology and will not be described herein.

As shown in fig. 1, the power cord has a power cord plug 1 connected to the core 2, and the disconnection mechanism and the on-off detection mechanism 15 may be disposed in the power cord plug 1, so that the power cord plug 1 may provide a housing protection for the disconnection mechanism and the on-off detection mechanism 15.

The embodiment of the invention also provides an air conditioner which can comprise any one of the temperature-sensitive protective power lines. Because the air conditioner is provided with the power line, compared with the problem that the resistance value of the existing temperature sensing materials such as a thermistor, a PTC resistor and the like can change along with the time extension to cause inaccurate temperature measurement, the temperature sensing material adopts the gasification piece 11 such as a thermosensitive pill and the like, when the temperature on the wire core 2 rises to the set temperature, the gasification piece 11 is gradually ablated until complete gasification, the process does not need to carry out resistance value test and conversion temperature, the problem of resistance value change caused by material aging does not need to be worried, and the on-off detection mechanism 15 can judge whether the temperature of the power line is abnormally increased or not only by detecting the on-off of the conductive loop 7, so that the detection is more accurate.

For ease of understanding, the overall structure of the invention is described below and its working principle is explained.

The invention aims at designing a temperature-sensing protective power line which can be applied to an air conditioner. The power line capable of being subjected to temperature sensing protection comprises a wire core 2, a temperature sensing device 4 and a conductive loop 7. The core 2 has a power line live wire 23, a power line neutral wire 22 and a power line ground wire 21. The conductive loop 7 has a conductive wire 3 connected in series within the loop. The temperature sensing device 4 is connected in series with the conducting wire 3. The conductive wire 3 extends in the length direction of the wire core 2. The number of the temperature sensing devices 4 is more than two, and the temperature sensing devices are sequentially arranged on the conducting wires 3 at intervals. The power line further comprises an insulating sheath 5, and the power line live wire 23, the power line neutral wire 22, the power line ground wire 21 and the conductive wire 3 are all covered in the insulating sheath 5. The power cord further comprises a power cord plug 1, the wire core 2 is connected with the power cord plug 1, a controller 6 is arranged in the power cord plug 1, and the controller 6 can be a control board or the like. The conductive wire 3 may be connected to a control board to form said conductive loop 7. The power cord plug 1 is also provided with an on-off detection mechanism 15, and the on-off detection mechanism 15 can be an on-off detection circuit integrated on a control board. The on-off detection mechanism 15 can detect on-off of the conductive loop 7.

The aforementioned temperature sensing device 4 includes a vaporizing element 11, a first conductive element 12, a second conductive element 9, a conductive housing 10, a conductive lead 8, an elastic element 13, and an insulating end cap 14. The first conductive member 12 may be a conductive baffle plate, the conductive baffle plate is located in the conductive housing 10, a solid vaporization member 11 is filled between the conductive baffle plate and the bottom of the conductive housing 10, the vaporization member 11 may be a heat sensitive pill, and the first conductive member 12 contacts the conductive housing 10 so as to keep the conductive housing 10 electrically connected with each other. The conductive leads 8 are disposed on a conductive housing 10, and the conductive shield is electrically connected to the conductive leads 8 through the conductive housing 10. Wherein the upper cover of the conductive housing 10 is provided with an insulating end cap 14. The second conductive element 9 may be a conductive lead 8, the second conductive element 9 being secured to an insulating end cap 14. The elastic member 13 is provided inside the insulating end cap 14. At normal temperature, the gasification member 11 is solid, the gasification member 11 stops and limits the first conductive member 12, so that the first conductive portion is in close contact with the second conductive portion, and at the moment, the conductive lead 8, the conductive shell 10, the first conductive member 12 and the second conductive member 9 form a conductive path, so that the conductive loop 7 is conducted. Wherein, the gasification member 11 is tightly contacted with the wire core 2 through the conductive shell 10, which is beneficial to the heat on the wire core 2 to be transferred to the gasification member 11. Once the temperature of the power line is abnormally increased to reach the set temperature, the gasification piece 11 is completely gasified, and the first conductive piece 12 moves to the space where the original gasification piece 11 is located under the action of the elastic piece 13, so that the first conductive piece 12 is separated from the second conductive piece 9 to disconnect the conductive line 3 and disconnect the conductive loop 7. When the on-off detection mechanism 15 detects that the conductive loop 7 is disconnected, a disconnection signal is generated, and the control board controls the action of the disconnection piece 16 according to the disconnection signal, so that the purpose of protecting the power line can be achieved by cutting off the power line and the live wire 23. Wherein the disconnect 16 may be a relay or a release, etc.

The power line of the invention adopts a temperature sensing device 4 which is internally provided with a solid gasification piece 11 such as a thermosensitive pill for sensing temperature, and can monitor the temperature of each place of the power line in real time. When the temperature on the wire core 2 is abnormally increased, the solid thermosensitive pellet is gasified and ablated, the temperature sensing device 4 is disconnected, and the conductive loop 7 is disconnected. The on-off detection mechanism 15 generates a disconnection signal when detecting that the conductive loop 7 is disconnected, and a controller 6 such as a control board arranged in the power line plug 1 can receive the disconnection signal to control a disconnection piece 16 such as a relay or a release to disconnect, so that the power supply is timely cut off, and the effect of protecting the power line is achieved.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (12)

1. The power line capable of being temperature-sensitive and protected is characterized by comprising a wire core (2), a temperature sensing device (4), a conductive loop (7) and an on-off detection mechanism (15),

the temperature sensing device (4) comprises a gasification piece (11), wherein the gasification piece (11) is positioned at the wire core (2) so as to gasify when the temperature on the wire core (2) reaches a set value, and the conductive loop (7) is disconnected;

the on-off detection mechanism (15) is used for detecting the on-off of the conductive loop (7).

2. A temperature-protectable power cord according to claim 1,

the temperature sensing device (4) further comprises a first conductive piece (12), a second conductive piece (9) and an elastic piece (13), wherein the temperature sensing device (4) is electrically connected between two conductive nodes of the conductive loop (7) through the first conductive piece (12) and the second conductive piece (9) so as to be connected on the conductive loop (7) in series;

the first conductive piece (12) is movable, the temperature sensing device (4) is provided with a first state and a second state, in the first state, the gasification piece (11) is in a solid state, the gasification piece (11) stops the first conductive piece (12), and the first conductive piece (12) is contacted with the second conductive piece (9) so as to conduct two conductive nodes; in the second state, the vaporizing element (11) is vaporized, and the elastic element (13) pushes the first conductive element (12) to be separated from the second conductive element (9) so as to break the electrical connection between the two conductive nodes.

3. A temperature-protectable power cord according to claim 2,

the temperature sensing device (4) further comprises a conductive shell (10) and an insulating end cover (14), wherein the insulating end cover (14) is used for covering the conductive shell (10) and forming a containing cavity (141) between the conductive shell and the insulating end cover, and the gasification part (11), the first conductive part (12) and the elastic part (13) are all arranged in the containing cavity (141);

wherein the first conductive piece (12) is in sliding fit with the side wall of the conductive shell (10), and the first conductive piece (12) is electrically connected with the conductive shell (10); the first conductive member (12) is electrically connected with one of the two conductive nodes through the conductive housing (10); the second conductive piece (9) is used for penetrating through the insulating end cover (14), and the second conductive piece (9) and the insulating end cover (14) are kept relatively fixed; wherein the second conductive member (9) is in contact with the first conductive member (12) through one end thereof extending into the accommodating chamber (141), and the second conductive member (9) is electrically connected with the other of the two conductive nodes through the other end thereof.

4. A temperature-protectable power supply line according to claim 3, characterized in that,

the electric conduction shell (10) is a heat conduction piece, and the gasification piece (11) is contacted with the wire core (2) through the electric conduction shell (10).

5. A temperature-protectable power supply line according to any one of claims 1 to 4,

the conducting loop (7) is provided with a conducting wire (3) connected in series in the loop, the conducting wire (3) extends along the length direction of the linear core (2), and the temperature sensing device (4) is arranged on the conducting wire (3) so as to be connected in series in the conducting loop (7) through the conducting wire (3).

6. A temperature-protectable power cord according to claim 5,

the conductive wire (3) is wound on the wire core (2).

7. The temperature-sensitive protectable power cord according to claim 5, further comprising an insulating sheath (5), said insulating sheath (5) being sleeved on said core (2), and said conductive wire (3) being located within said insulating sheath (5).

8. A temperature-protectable power cord according to any of claims 1 to 4, 6, 7, further comprising a disconnection mechanism for disconnecting the power cord (23) within the core (2) when the conductive loop (7) is disconnected.

9. A temperature-protectable power cord according to claim 8, characterized in that said disconnection mechanism comprises a controller (6) and a disconnection member (16), said disconnection member (16) being connected in series on said power cord (23); the disconnecting mechanism is used for controlling the disconnecting piece (16) through the controller (6) when the conductive loop (7) is disconnected, so that the disconnecting piece (16) is disconnected to disconnect the power line and the live wire (23) in the wire core (2).

10. A temperature-protectable power cord according to claim 9,

the on-off detection mechanism (15) is used for generating a disconnection signal when the conductive loop (7) is detected to be disconnected, and the controller (6) controls the disconnection piece (16) to be disconnected according to the disconnection signal;

and/or the breaking element (16) is a relay or a release.

11. A temperature-protectable power cord according to claim 8,

the power cord is provided with a power cord plug (1) connected with the wire core (2), and the disconnection mechanism and the on-off detection mechanism (15) are both arranged in the power cord plug (1).

12. An air conditioner comprising the temperature-protectable power cord of any one of claims 1 to 11.