Temperature sensing power cord and electric water heater

Abstract

The application discloses a temperature sensing type power line and an electric water heater. The temperature sensing type power line comprises a power line body and a power plug. The power line body comprises a first body, an input end of which is connected with the power plug; a second body, an output end of which is used for being connected with an electric device; and a temperature sensing circuit breaking device, which is used for sensing the temperature of the electric device and cutting off the circuit of the power line when the temperature reaches a set value. The input end and the output end of the temperature sensing circuit breaking device are connected with the output end of the first body and the input end of the second body respectively. The temperature sensing type power line has the temperature sensing function, can automatically cut off the circuit when the sensed temperature reaches the set value, plays a role of protecting the circuit and the electric device, guarantees the life and property safety of the user, increases the service life of the power line and the electric device, reduces the probability of the circuit failure, and guarantees the life and property safety of the user.

Description

Technical Field

[0001] This invention belongs to the field of home appliance technology, specifically relating to a temperature-sensing power cord and an electric water heater. Background Technology

[0002] With the continuous improvement of people's living standards, electric water heaters have become a new generation of household appliances and are becoming increasingly popular. Electric water heaters are equipped with thermal circuit breakers, which automatically cut off power when the temperature is too high, ensuring the safety of the water heater. Currently, the thermal circuit breakers used in electric water heaters vary slightly in shape, size, and even principle, but they are all used as separate components connected in series with the circuit. There are generally two installation methods for thermal circuit breakers. One method involves pressing the metal cover of the thermal circuit breaker tightly against the mounting surface of the controlled appliance and applying a heat-conducting medium to the temperature-sensing surface. This method is prone to poor assembly due to the uncontrollable nature of employee operation, resulting in inaccurate temperature sensing. It not only makes the assembly process more complex but also increases the failure rate. The other method involves first fixing the thermal circuit breaker to the heating element or the appliance compartment. This fixing process can create fixing defects, and then connecting the positive and negative terminals of the power cord to the positive and negative terminals of the thermal circuit breaker. This assembly process is also quite cumbersome.

[0003] Chinese Patent Application No. CN201621402913.7 discloses a power cord assembly and an electric water heater having the same. The power cord assembly includes: a connector; a power cord, one end of which is electrically connected to the connector, the power cord having a neutral wire, a live wire, and a ground wire; and a power plug, the other end of which is electrically connected to the power cord, the power plug having three-pronged pins connected to the neutral wire, the live wire, and the ground wire respectively, and a three-pronged interlocking switch for changing the connection between the connector and the three-pronged pins from an on state to an off state.

[0004] In the above solution, the electric water heater has a three-pole linkage switch between the three-pole plug and the connector on the power cord, which can realize the switching on and off of the neutral wire, live wire and ground wire. This can easily control the switching on and off of the connector and the three-pole plug, which is beneficial to the protection of the appliance and ensures the safety of the appliance's electricity use. However, the thermal circuit breaker in the electric water heater is still connected to the power cord as an independent component, which makes the installation process more complicated and has a high failure rate during installation.

[0005] In view of the above-mentioned technical deficiencies, this invention is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a temperature-sensing power cord with temperature sensing function. It has a simple structure, strong safety, and can cut off the circuit when the temperature reaches the set value, thereby protecting the circuit and the electrical equipment and ensuring the stability of the circuit.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0008] A temperature-sensitive power cord includes a cord body and a power plug; the cord body includes...

[0009] The first main body has its input end connected to the power plug;

[0010] The second main body has an output end used to connect to electrical equipment;

[0011] And a temperature-sensing circuit breaker, used to cut off the power supply when the temperature of the electrical equipment reaches a set value, wherein the input and output terminals of the temperature-sensing circuit breaker are respectively connected to the output terminal of the first main body and the input terminal of the second main body.

[0012] By adopting the above solution, the circuit can be automatically cut off when the sensed temperature reaches the set value, thereby protecting the circuit and electrical equipment and ensuring the safety of users' lives and property.

[0013] In addition, it can replace the existing installation method of connecting the power cord to the thermal circuit breaker and then to the electrical equipment for controlling the on / off state of the electrical equipment, simplifying the relevant installation steps and saving manpower and resources.

[0014] Furthermore, the temperature-sensing circuit breaker includes

[0015] A switch, electrically connected to the first and second bodies, is used to cut off and turn on the circuit.

[0016] A control component, connected to the switch, is used to control the switch to open and close.

[0017] Furthermore, the first and second main bodies include a live wire and a neutral wire;

[0018] The switch is installed on the live wire and / or neutral wire and is used to control the on / off state of the live wire and / or neutral wire;

[0019] Preferably, the switch is installed on the live wire and the neutral wire.

[0020] By adopting the above solution, the switch can cut off both the neutral wire circuit and the live wire circuit, providing dual protection and preventing circuit failures or even fire hazards caused by the switch not completely cutting off the circuit when the set value is reached.

[0021] Furthermore, the control component includes

[0022] Temperature sensing element, used to sense and transmit temperature;

[0023] A trigger unit is located between the switch and the temperature sensing unit, connecting the switch and the temperature sensing unit;

[0024] The temperature sensing unit transmits the sensed temperature to the triggering unit, which then triggers the switch to open and close.

[0025] Furthermore, the temperature sensing unit includes

[0026] The sensing wire, one end of which is connected to the triggering part, is used to transmit temperature;

[0027] A temperature sensing probe, connected to the other end of the sensing line, is located at the output end of the second main body and is used to connect to electrical equipment.

[0028] Furthermore, the triggering unit includes

[0029] An action unit, one end of which is connected to the switch, and its action causes the switch to open and close.

[0030] The temperature-sensing deformation unit has a temperature-sensing deformation function and is connected to the other end of the action unit and the temperature sensing unit.

[0031] The deformation of the temperature-sensing deformation unit controls the action of the motion unit.

[0032] Preferably, the actuation unit is a push-pull rod;

[0033] Preferably, the temperature-sensitive deformation unit is a temperature-sensitive deformation metal sheet.

[0034] Furthermore, the outer surface of the main body of the wire is wrapped with an insulating layer;

[0035] The temperature sensing probe is located outside the insulating layer, while other parts of the temperature-sensing circuit breaker are enclosed inside the insulating layer.

[0036] By adopting the above solution, the temperature sensor is installed on the outside of the insulation layer, facilitating connection to the electrical equipment. It senses the temperature of the equipment, preventing damage such as burnout or freezing due to excessively high or low temperatures, thus protecting the equipment, increasing its lifespan, and reducing the user's living costs. Encasing other parts of the temperature-sensing circuit breaker inside the insulation layer protects the device and ensures the structural stability of the temperature-sensing power cord.

[0037] Furthermore, the temperature-sensing circuit breaker is an integral part of the first and second main bodies. By adopting the above solution, the temperature-sensing circuit breaker is an integral part of the first and second main bodies, simplifying the connection and installation steps of the temperature-sensing circuit breaker and the wire body, improving production efficiency, and reducing production costs.

[0038] Furthermore, the temperature-sensing circuit breaker also has a mounting housing, on which the switch and control components are mounted for supporting and fixing the switch and control components.

[0039] By adopting the above scheme, the mounting shell can fix and support the various components in the temperature-sensing circuit breaker, prevent abnormal operation of the switch and control components due to external forces, and thus prevent abnormal connection and disconnection of the power line.

[0040] Another object of the present invention is to provide an electric water heater having the above-mentioned temperature-sensing power cord.

[0041] By adopting the above solution, the assembly process of thermal circuit breakers, power cords, and electric water heaters can be simplified, which not only improves assembly efficiency but also reduces the probability of malfunctions caused by errors in each assembly step, thus reducing the defects of electric water heaters. In addition, it can also reduce production costs and save manpower and material resources.

[0042] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0043] 1. Temperature-sensitive power cords have the function of sensing and transmitting temperature. They can control the on / off state of the power cord circuit through temperature changes, ensuring that the circuit is in an open state when the temperature is higher or lower than the set value, thus protecting the power cord and the electrical equipment connected to the power cord.

[0044] 2. The structure is simple and can be directly connected to electrical equipment. It can replace the existing installation method of connecting the power cord and thermal circuit breaker before connecting to the electrical equipment, which simplifies the installation steps, reduces the production cost of the electrical equipment, and saves manpower and material resources.

[0045] 3. The switch of the temperature-sensing circuit breaker is installed on the live wire and the neutral wire. It can cut off either circuit as long as it can ensure that the circuit is cut off in time when the temperature is higher or lower than the set value, thus reducing the probability of circuit failure.

[0046] 4. Temperature-sensing circuit breakers can be used to cut off circuits at both high and low temperatures, making them widely applicable and highly adaptable.

[0047] 5. The temperature-sensing power cord has multiple installation methods, further expanding its applicability.

[0048] 6. Electric water heaters with this temperature-sensing power cord can simplify the assembly process of thermal circuit breakers, power cords, and electric water heaters. This not only improves assembly efficiency and reduces the probability of failures caused by errors in each assembly step, but also reduces the defects of electric water heaters and lowers production costs.

[0049] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0050] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0051] Figure 1 This is a schematic diagram of the structure of the temperature-sensing power cord of the present invention;

[0052] Figure 2 This is a schematic diagram of the structure of the temperature-sensing circuit breaker of the present invention;

[0053] Figure 3 yes Figure 2 Another perspective diagram.

[0054] In the diagram: 11. Main body of the wire; 101. First main body; 102. Second main body; 111. Live wire; 112. Neutral wire; 113. Ground wire; 12. Insulation layer; 13. Power plug; 2. Temperature-sensing circuit breaker; 21. Switch; N. Neutral terminal; L. Live terminal; 211. Metal sheet; 22. Control component; 221. Temperature sensor; 2211. Temperature probe; 2212. Sensing wire; 222. Temperature-sensing deformation unit; 223. Action unit; 23. Mounting shell; 231. Through hole.

[0055] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0057] In the description of this invention, it should be noted that the terms "upper," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] like Figures 1 to 3 As shown, the present invention discloses a temperature-sensitive power cord, comprising a power cord body 11 and a power plug 13; the power cord body 11 includes a first body 101, the input end of which is connected to the power plug 13; a second body 102, the output end of which is used to connect to an electrical device; and a temperature-sensitive circuit breaker 2, which is used to cut off the power cord circuit when the temperature of the electrical device reaches a set value, the input end and the output end of the temperature-sensitive circuit breaker 2 being connected to the output end of the first body 101 and the input end of the second body 102, respectively.

[0060] The temperature-sensing power cord of this invention has a temperature sensing function, which enables it to automatically cut off the circuit when the sensed temperature reaches a set value, thereby protecting the circuit and electrical equipment and ensuring the safety of users' lives and property. It can replace the existing installation method of connecting the power cord to a thermal circuit breaker and then to the electrical equipment to control the equipment's on / off state at a set temperature, simplifying the installation process and saving manpower and resources.

[0061] The temperature sensing function of the temperature-sensing power cord can sense both high and low temperatures. Therefore, the temperature-sensing power cord can be used to power heating devices or cooling devices, and can automatically cut off the circuit when the temperature reaches the set value.

[0062] like Figure 2 As shown, the temperature-sensing circuit breaker 2 includes a switch 21, which is electrically connected to the first body 101 and the second body 102, for cutting off and connecting the circuit of the power line 1; and a control component 22, which is connected to the switch 21, for controlling the switch 21 to open and close.

[0063] The first body 101 and the second body 102 include a live wire 111 and a neutral wire 112; the switch 21 is installed on the live wire 111 and / or the neutral wire 112 and is used to control the on / off state of the live wire 111 and / or the neutral wire 112. The switch 21 consists of a terminal block and a metal piece 211 connected to the terminal block.

[0064] Furthermore, such as Figure 1 As shown, the first body 101 and the second body 102 also include a ground wire 113 for grounding to ensure the safety of the power line and electrical equipment.

[0065] As one implementation method, such as Figure 2 As shown, the switch 21 is installed on the live wire 111. The switch 21 consists of a terminal block and a metal piece 211 connected to the terminal block. The terminal block consists of two live wire terminals L connected to the live wire 111. The two live wire terminals L are electrically connected through two contacting metal pieces 211.

[0066] As an alternative to the above solution, the switch 21 is installed on the live wire 111 and the neutral wire 112. Figure 2 and Figure 3 As shown, the switch 21 consists of terminals and metal pieces 211 connected to the terminals. The terminals include two live wire terminals L connected to the live wire 111 and two neutral wire terminals N connected to the neutral wire 112. The two live wire terminals L are electrically connected through two contacting metal pieces 211, and the two neutral wire terminals N are electrically connected through two contacting metal pieces 211.

[0067] The switch 21 can cut off both the circuit of the neutral wire 112 and the circuit of the live wire 111, providing dual protection. It can prevent circuit failures or even fire hazards caused by the switch 21 not completely cutting off the circuit when the temperature reaches the set value.

[0068] The control component 22 includes a temperature sensing unit 221 for sensing and transmitting temperature; and a trigger unit located between the switch 21 and the temperature sensing unit 221, connecting the switch 21 and the temperature sensing unit 221; the temperature sensing unit 221 transmits the sensed temperature to the trigger unit, and the trigger unit triggers the switch 21 to open and close.

[0069] like Figure 1 As shown, the temperature sensing unit 221 includes a sensing line 2212, one end of which is connected to the triggering unit for transmitting temperature; and a temperature sensing probe 2211, which is connected to the other end of the sensing line 2212 and is located at the output end of the second main body 102 for connecting to electrical equipment.

[0070] like Figure 2As shown, the triggering part includes an action unit 223, one end of which is connected to the switch 21, and its action causes the switch 21 to open and close; a temperature-sensing deformation unit 222, which has a temperature-sensing deformation function, is connected to the other end of the action unit 223 and the temperature sensing part 221; the deformation of the temperature-sensing deformation unit 222 controls the action unit 223. One end of the action unit 223 is connected to a metal plate 211 on one side of the switch 21.

[0071] The material of the temperature-sensing deformation unit 222 can be selected as needed, so that the temperature-sensing deformation unit 222 has a corresponding deformation rate.

[0072] As a preferred option, such as Figure 2 As shown, the action unit 223 is a push-pull rod; the temperature-sensitive deformation unit 222 is a temperature-sensitive deformation metal sheet, and the push-pull rod is perpendicular to the temperature-sensitive deformation metal sheet.

[0073] like Figure 1 As shown, the outer surface of the main body 11 of the wire is covered with an insulation layer 12; the temperature sensing probe 2211 is located outside the insulation layer 12 and is connected to the electrical equipment to sense the temperature of the electrical equipment; the other parts of the temperature sensing circuit breaker 2 are wrapped inside the insulation layer 12.

[0074] The temperature-sensing probe 2211 of the temperature-sensing circuit breaker 2 of the present invention is installed on the outside of the insulation layer 12 for easy connection to electrical equipment. It is used to sense the temperature of the electrical equipment, preventing it from being burned or frozen due to excessively high or low temperatures, thus protecting the equipment, increasing its service life, and reducing the user's living costs. Enclosing other parts of the temperature-sensing circuit breaker 2 inside the insulation layer 12 protects the device and ensures the structural stability of the temperature-sensing power cord.

[0075] Furthermore, the temperature-sensing circuit breaker 2 is an integral structure with the first body 101 and the second body 102. The live wire terminal L is integrally formed with the live wire 111, and the neutral wire terminal N is integrally formed with the neutral wire 112.

[0076] The temperature-sensing circuit breaker 2 is an integral structure with the first main body 101 and the second main body 102, which simplifies the connection and installation steps of the temperature-sensing circuit breaker 2 and the wire body 11, improves production efficiency, and reduces production costs.

[0077] Working principle: (taking high temperature circuit breaking as an example) When the temperature sensor 2211 senses that the temperature has reached the set value, it transmits the sensed temperature to the temperature deformation unit 222 through the sensor line 2212. The connection between the temperature deformation unit 222 and the sensor line 2212 is heated and expands, bending towards the side of the action unit 223. When it touches the action unit 223, it moves towards the side of the switch 21, which then drives the metal piece 211 connected to the action unit 223 to move, and the switch 21 is opened. When the temperature sensor 2211 senses that the temperature is not higher than the set value, the temperature sensor 2211 transmits the sensed low temperature to the temperature deformation unit 222 through the sensing line 2212, or the temperature deformation unit 222 cools down itself. The connection between the temperature deformation unit 222 and the sensing line 2212 cools down and contracts, pulling the action unit 223 to move towards one side of the temperature deformation unit 222. The action unit 223 drives the metal plate 211 of the switch 21 to move towards one side of the temperature deformation unit 222. The two sets of metal plates 211 are in a connected state, and the circuit is turned on.

[0078] The temperature-sensing circuit breaker 2 also has a mounting housing 23, on which the switch 21 and the control component 22 are mounted to support and fix the switch 21 and the control component 22.

[0079] like Figure 2 and Figure 3 As shown, the mounting housing 23 is a circular cover structure. The temperature-sensing deformation unit 222 is located at one open end of the mounting housing 23 and is a circular temperature-sensing deformation metal sheet that matches the mounting housing 23. The switch 21 is mounted at the other end of the mounting housing 23, with the live wire terminal L and the neutral wire terminal N protruding from the surface of the mounting housing 23. A through hole 231 is provided in the middle of the mounting housing 23, through which the actuation unit 223 and the metal sheet 211 of the switch 21 pass. The sensing wire 2212 is an integral structure with the actuation unit 223, passing through the temperature-sensing deformation unit 222 and the through hole 231.

[0080] The mounting housing 23 can fix and support the various components in the temperature-sensing circuit breaker 2, prevent abnormal operation of the switch 21 and control components 22 due to external forces, and thus prevent abnormal switching of the temperature-sensing power cord.

[0081] Another object of the present invention is to provide an electric water heater having the above-mentioned temperature-sensing power cord. The electric water heater includes a heating blind tube.

[0082] The temperature sensor 2211 can extend into the interior of the heating tube blind tube to sense the temperature of the inner tank. When installing the electric water heater and the temperature-sensing power cord, the live wire 111 and the neutral wire 112 are directly plugged into the relay, which is simple to assemble and highly reliable.

[0083] The electric water heater with a temperature-sensing power cord of the present invention simplifies the assembly process of the thermal circuit breaker, power cord, and water heater, improving assembly efficiency and reducing the probability of malfunctions caused by errors in each assembly step, thus reducing defects in the electric water heater. Furthermore, it reduces the production cost of the electric water heater, saving manpower and resources.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A temperature-sensitive power cord, comprising a cord body and a power plug; characterized in that, The wire body includes The first main body has its input end connected to the power plug; The second main body has an output end used to connect to electrical equipment; And a temperature-sensing circuit breaker, used to cut off the power line when the temperature of the electrical equipment reaches a set value, wherein the input and output terminals of the temperature-sensing circuit breaker are respectively connected to the output terminal of the first main body and the input terminal of the second main body; The temperature-sensing circuit breaker includes a switch and a control component; The switch consists of a live wire terminal and a neutral wire terminal integrally formed with the live wire and neutral wire of the main body of the wire, and a metal piece connected between the corresponding terminals. The control component includes a temperature sensing unit and a triggering unit; the temperature sensing unit includes a sensing wire and a temperature sensing probe for sensing temperature; the triggering unit includes an action unit and a temperature-sensing deformation unit, the action unit is a push-pull rod, and the temperature-sensing deformation unit is a circular temperature-sensing deformation metal sheet that matches the mounting shell; one end of the push-pull rod is connected to the movable metal sheet of the switch, and the sensing wire and the push-pull rod are an integral structure; The temperature-sensing circuit breaker also has a mounting shell; the circular temperature-sensing deformable metal sheet is disposed at one open end of the mounting shell, the switch is mounted at the other end of the mounting shell, and the live wire terminal and the neutral wire terminal protrude from the surface of the mounting shell; the mounting shell is provided with a through hole, the actuating unit is connected to the metal sheet of the switch through the through hole, and the sensing wire passes through the temperature-sensing deformable unit and the through hole; The main body of the wire is wrapped with an insulating layer, the temperature sensing probe is located outside the insulating layer, and the mounting shell and all its internal components are wrapped inside the insulating layer. The temperature-sensing circuit breaker is an integral structure with the first and second main bodies.

2. The temperature-sensing power cord according to claim 1, characterized in that, The temperature-sensing circuit breaker includes A switch, electrically connected to the first and second bodies, is used to cut off and turn on the circuit. A control component, connected to the switch, is used to control the switch to open and close.

3. A temperature-sensing power cord according to claim 2, characterized in that, The switch is installed on the live wire and the neutral wire.

4. A temperature-sensing power cord according to claim 3, characterized in that, The control component includes Temperature sensing element, used to sense and transmit temperature; A trigger unit is located between the switch and the temperature sensing unit, connecting the switch and the temperature sensing unit; The temperature sensing unit transmits the sensed temperature to the triggering unit, which then triggers the switch to open and close.

5. A temperature-sensing power cord according to claim 4, characterized in that, The temperature sensing unit includes The sensing wire, one end of which is connected to the triggering part, is used to transmit temperature; A temperature sensing probe, connected to the other end of the sensing line, is located at the output end of the second main body and is used to connect to electrical equipment.

6. A temperature-sensing power cord according to claim 4, characterized in that, The triggering unit includes: An action unit, one end of which is connected to the switch, and its action causes the switch to open and close. The temperature-sensing deformation unit has a temperature-sensing deformation function and is connected to the other end of the action unit and the temperature sensing unit. The deformation of the temperature-sensing deformation unit controls the action of the action unit.

7. A temperature-sensing power cord according to any one of claims 1-6, characterized in that, The temperature-sensing circuit breaker also has a mounting housing, on which the switch and control components are mounted for supporting and fixing the switch and control components.

8. A water heater, characterized in that, It has a temperature-sensitive power cord as described in any one of claims 1-7.

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