CN214960156U - Electric heater - Google Patents

Abstract

The present disclosure relates to an electric heater comprising: a housing having a cavity formed therein; the power supply module is arranged in the cavity, one end of the power supply module is electrically connected with an external power supply, and the other end of the power supply module is provided with a first electric connection terminal; the heating pipe is arranged in the cavity, and a second electric terminal is arranged on the heating pipe; and one end of the copper sheet is electrically connected with the first electric connection terminal, and the other end of the copper sheet is electrically connected with the second electric connection terminal. This openly adopts the copper sheet to replace the wire to connect, the maintenance of the assembly of being more convenient for and later stage, and the hookup location is clean and tidy pleasing to the eye, and the security is higher.

Description

Electric heater

Technical Field

The present disclosure relates to the technical field of electric heaters, and particularly relates to an electric heater.

Background

An electric heater is a common heating device used for heating, preserving and heating flowing liquid and gaseous media. When the heating medium passes through the heating cavity of the electric heater under the action of pressure, the fluid thermodynamic principle is adopted to uniformly take away huge heat generated in the working process of the electric heating element, so that the temperature of the heated medium meets the process requirements of users.

The electric heater mostly adopts an indirect heating mode, and generally comprises a shell, a power module and a heating pipe, wherein one end of the power module is electrically connected with an external power supply, generally a mains supply, and the other end of the power module is electrically connected with the heating pipe. The power module usually includes a common buck-boost circuit and a common rectification voltage-stabilizing circuit, and is used for converting the commercial power into a current which can be applied to the heating pipe, the heating pipe is generally made of a special alloy material or a non-metal material, such as iron-aluminum alloy, nickel-chromium alloy, silicon carbide, molybdenum disilicide and the like, the heating pipe is rapidly heated up to generate heat when being electrified, and the heat is transferred to a heated object through radiation, convection or conduction and the like, so that the electric heating is realized.

In order to improve the heating efficiency of the electric heater, the number of the heating pipes is generally multiple, and the heating pipes are arranged in the housing in an arrangement manner, and in order to avoid crosstalk between currents, the power module is generally provided with the same number of electric terminals, and then the electric terminals and the heating pipes are connected in a one-to-one correspondence manner by using wires. The above-mentioned method using wire connection has the following disadvantages:

firstly, the heating pipes are large in number, the corresponding wires are also large in number, the wires are easy to wind and knot during assembly, inconvenience is brought to the assembly process, on the other hand, the wires are large in number, wiring is not attractive enough, and the wires are easy to wind and knot during later-stage maintenance;

secondly, the outside of the lead is usually provided with a wire skin made of insulating materials such as rubber, and in some high-power electric heaters, the electric terminals can pass high-voltage current during working, the end parts of the lead are in direct contact with the electric terminals, the wire skin at the end parts is in contact with the electric terminals, the phenomenon of overheating and ignition can occur, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of the prior art, the present disclosure is directed to an electric heater. This openly adopts the copper sheet to replace the wire to connect, the maintenance of the assembly of being more convenient for and later stage, and the hookup location is clean and tidy pleasing to the eye, and the security is higher.

An electric heater according to the present disclosure includes:

a housing having a cavity formed therein;

the power supply module is arranged in the cavity, one end of the power supply module is electrically connected with an external power supply, and the other end of the power supply module is provided with a first electric connection terminal;

the heating pipe is arranged in the cavity, and a second electric terminal is arranged on the heating pipe;

and one end of the copper sheet is electrically connected with the first electric connection terminal, and the other end of the copper sheet is electrically connected with the second electric connection terminal.

Preferably, the first and second electrical terminals each include a terminal block and a post disposed on the terminal block; and wiring holes matched with the wiring terminals are formed at two ends of the copper sheet, and the wiring holes are sleeved on the wiring terminals.

Preferably, the outer walls of the two sides of the binding post are relatively provided with a pair of elastic pieces, the elastic pieces are electrically connected with the binding post, the elastic pieces are located at positions close to the terminal seat, one end, far away from the terminal seat, of the elastic pieces is connected with the outer wall of the binding post, and the other end of the elastic pieces is suspended.

Preferably, a stepped bayonet is formed at a position of the elastic sheet close to the terminal block, and a distance between the bayonet and the end face of the terminal block is smaller than the thickness of the copper sheet.

Preferably, the copper sheet is in a long sheet shape, two ends of the copper sheet are bent towards the same side to form an electric connection portion, and the two wiring holes are respectively arranged on the electric connection portions at the two ends.

Preferably, the electric heater further comprises:

the protective cover is made of an insulating material and sleeved on the outer side of the copper sheet.

Preferably, the protection casing is the disc, including the upper cover body and the lower cover body, the lower cover body with the shell is connected, the upper cover body with the lower cover body can dismantle the connection.

Preferably, the upper cover body is detachably connected with the lower cover body through a buckle.

Preferably, the electric heater further comprises:

the microswitch is arranged at the connecting position of the upper cover body and the lower cover body and is electrically connected with the power module.

Preferably, the electric heater further comprises:

the indicating lamp is arranged outside the protective cover, and the micro switch is electrically connected with the indicating lamp.

The utility model discloses an electric heater, its advantage lie in, this is openly through the copper sheet with electric connection between power module and the heating pipe, replaced the connected mode that the wire was connected among the prior art, compare in the mode that the wire is connected, the copper sheet is connected and is arranged neatly, can not rock at will, easy winding problem of knoing when having solved the wire connection, the assembly of being more convenient for and the maintenance in later stage are overhauld, and enable the hookup location neatly more pleasing to the eye. Meanwhile, potential safety hazards existing when the wire skin at the end part of the conducting wire is contacted with the power connection terminal are also solved by the copper sheet, and the safety is higher.

Drawings

FIG. 1 is a schematic structural view of an electric heater according to the present disclosure;

FIG. 2 is a schematic view of a portion of an electric heater according to the present disclosure;

FIG. 3 is an enlarged schematic view of the position A in FIG. 2;

FIG. 4 is a schematic structural view of a copper sheet according to the present disclosure;

fig. 5 is a schematic structural view of the protective cover of the present disclosure.

Description of reference numerals: the power supply comprises a shell 1, a power supply module 2, a first electric connection terminal 21, a heating pipe 3, a second electric connection terminal 31, a copper sheet 4, a wiring hole 41, an electric connection part 42, a terminal base 51, a wiring terminal 52, an elastic sheet 6, a protective cover 7, an upper cover body 71, a lower cover body 72 and a buckle 8.

Detailed Description

As shown in fig. 1-5, an electric heater according to the present disclosure includes:

the casing 1 is in a long cylindrical shape, and a cavity for arranging each part is formed inside the casing 1.

The power module 2, the power module 2 generally integrates a common buck-boost circuit and a common rectification and voltage-stabilizing circuit into a circuit board, and then integrates into a power box, one end of the power box is provided with a power jack for electrically connecting with an external power supply, such as a mains supply, and the other end is provided with a first electrical terminal 21 for electrically connecting with the heating pipe 3.

The heating tube 3, the heating tube 3 generally adopts a long-strip U-shaped tube structure made of materials such as iron-aluminum alloy, nickel-chromium alloy, silicon carbide, molybdenum disilicide, etc., and the left end portion (taking the direction shown in fig. 1 as an example) of the heating tube 3 is provided with a second electrical connection terminal 31 for electrically connecting with the first electrical connection terminal 21 of the power module 2. To improve the heating efficiency, please refer to fig. 5 in detail, the number of the heating pipes 3 is generally a plurality of pipes, which are arranged in the same direction as the housing 1 and are arranged in the cavity in a circumferential array around the center of the cross section of the housing 1, so that the heating pipes 3 have high heating efficiency and uniform heat dissipation.

Referring to fig. 4, the copper sheet 4 is in a long sheet shape, one end of the copper sheet 4 is electrically connected to the first electrical terminal 21, and the other end of the copper sheet 4 is electrically connected to the second electrical terminal 31, so that the power module 2 is electrically connected to the heating tube 3, the current output by the external power source is adjusted to be the current suitable for the heating tube 3 by the buck-boost regulation and the rectification voltage stabilization of the power module 2, and the current sequentially flows through the first electrical terminal 21, the copper sheet 4 and the second electrical terminal 31 to flow into the heating tube 3, so that the heating tube 3 is electrically heated, and the heating tube 3 emits heat to heat the object to be heated, thereby achieving electrical heating.

This is disclosed through copper sheet 4 with electric connection between power module 2 and the heating pipe 3, has replaced the connected mode that the wire was connected among the prior art, compares in the mode that the wire was connected, and copper sheet 4 is connected and is arranged neatly, can not rock at will, has solved the problem that the wire easily twines when connecting and has knoed, the assembly of being more convenient for and the maintenance in later stage are overhauld, and enable the hookup location neatly more pleasing to the eye. Meanwhile, potential safety hazards existing when the wire skin at the end part of the lead is contacted with the power connection terminal are also solved by the copper sheets 4, and the safety is higher.

Further, in the present embodiment, referring to fig. 3 in detail, the first electrical terminal 21 and the second electrical terminal 31 have the same structure, and taking the first electrical terminal 21 shown in fig. 3 as an example, the first electrical terminal 21 includes a terminal block 51 and a post 52 disposed on the terminal block 51. Specifically, terminal seat 51 is processed into square pedestal, and its left end face sets up on power module 2, and inside cavity, its right-hand member face form have with the mounting hole of terminal 52 looks adaptation, and the lateral wall is attacked and is equipped with the internal thread in the mounting hole, and the cylinder that terminal 52 was made for adopting conducting material, its left end is attacked and is equipped with the external screw thread, and the left end of terminal 52 stretches into in the mounting hole to with power module 2's internal circuit electrical contact, realize electric connection.

Referring to fig. 4 in detail, wiring holes 41 adapted to the terminals 52 are formed at two ends of the copper sheet 4, a hole diameter of the wiring hole 41 is slightly larger than an outer diameter of the terminal 52, and the wiring hole 41 is sleeved on the terminal 52 to electrically connect the copper sheet 4 and the terminal 52. The structure of the electric terminals and the copper sheet 4 can facilitate the assembly of the copper sheet 4.

Further, in this embodiment, referring to fig. 3 in detail, a pair of elastic pieces 6 are disposed on two outer walls of the terminal 52, the elastic pieces 6 are electrically connected to the terminal 52, the elastic pieces 6 are located near the terminal base 51, one end of the elastic pieces 6 far away from the terminal base 51 is connected to the outer wall of the terminal 52, the other end is suspended, the elastic pieces 6 are generally made of copper, so that they have electrical conductivity and certain elasticity, taking the connection process of the copper sheet 4 and the first electrical terminal 21 as an example, when connecting the copper sheet 4 to the first electrical terminal 21, the wiring hole 41 of the copper sheet 4 is aligned with the terminal 52 of the first electrical terminal 21, then the copper sheet 4 is moved horizontally leftward, so that the wiring hole 41 at the left end passes through the terminal 52, when the copper sheet 4 moves to contact with the elastic pieces 6, the inner wall of the wiring hole 41 presses the elastic pieces 6, so that the elastic pieces 6 are compressed and deformed inward, when the elastic sheet 6 penetrates through the position of the wiring hole 41, the inner wall of the wiring hole 41 does not limit the elastic sheet 6, the elastic sheet 6 naturally recovers, deforms and pops outwards, and the elastic sheet 6 can limit the left end of the copper sheet 4, so that the copper sheet 4 is stably installed. In some embodiments, the power module 2 and the heating tube 3 are connected by assembling the power module 2 in the housing 1, connecting the copper sheets 4 to the first electrical terminals 21 of the power module 2, and inserting the heating tube 3 from the right side, so that the second electrical terminals 31 at the left end of the heating tube 3 are connected to the wiring holes 41 at the right end of the copper sheets 4. When the copper sheet 4 is repaired and replaced, the corresponding heating pipe 3 is generally detached first, the heating pipe 3 is pulled out rightwards to separate the copper sheet 4 from the heating pipe 3, and then the copper sheet 4 is pulled out rightwards. Through foretell elastic strip 6 structure, when the equipment with dismantle copper sheet 4 direct plug can, it is very convenient, on the other hand, can spacing copper sheet 4 through elastic strip 6, make copper sheet 4 installation firm, difficult not hard up.

Further, in this embodiment, please continue to participate in fig. 3, a step-shaped bayonet is formed at a position of the elastic sheet 6 close to the terminal base 51, a distance between the bayonet and the end surface of the terminal base 51 is smaller than a thickness of the copper sheet 4, and the bayonet structure further enhances connection stability between the copper sheet 4 and the power module 2 and the heating pipe 3 due to pressing and clamping the copper sheet 4.

Further, in this embodiment, referring to fig. 4 in detail, the copper sheet 4 is a long sheet, two ends of the copper sheet are bent towards the same side to form the electrical connection portions 42, the two wiring holes 41 are respectively disposed on the electrical connection portions 42 at two ends, and the structure of the copper sheet 4 is designed according to the structure of the electrical heater commonly used at present, so that the copper sheet 4 is convenient to mount and stable in connection.

Further, in this embodiment, referring to fig. 5 in detail, the electric heater further includes a protective cover 7, the protective cover 7 is made of an insulating high-temperature resistant material, such as ceramic fiber, the protective cover 7 is in a shape of a disc and is sleeved on the outer side of the copper sheet 4, and the protective cover 7 mainly plays a role of insulating protection. Normally, the electric heater strictly prohibits the shell 1 from being opened in the energized state, and the shell 1 of the electric heater has excellent insulating performance, so the copper sheet 4 is generally not contacted with the human body in the energized state, and the safety is guaranteed. However, in order to further enhance the safety of the electric heater, in the embodiment, the protective cover 7 is sleeved on the outer side of the integral copper sheet 4, so that even if the shell 1 is opened by mistake in the electrified state, the protective cover 7 can isolate the copper sheet 4, prevent the electrified copper sheet 4 from contacting the human body, and improve the safety.

More specifically, the protective cover 7 includes an upper cover 71 and a lower cover 72, the lower cover 72 is disposed in the housing 1 and connected to the housing 1 through bolts, and the upper cover 71 and the lower cover 72 are detachably connected to each other, so that the protective cover 7 is integrally formed in a split structure. During assembly, the lower cover body 72 can be installed firstly, then the copper sheet 4 is assembled, and finally the upper cover body 71 is installed, so that the copper sheet 4 and the protective cover 7 can be assembled conveniently through the split structure.

Further, in this embodiment, go up cover 71 and can dismantle through buckle 8 and be connected between the cover 72 down, buckle 8 select for use elastic buckle 8 commonly used can, install the lower extreme border of last cover 71 with the pin thread, install the box at the upper end border of cover 72 down, align the lock with pin thread and box during the equipment, can be connected upper cover 71 and cover 72 down. The mode that buckle 8 is connected easy dismounting is quick.

Further, in this embodiment, the electric heater further includes a micro switch (not shown in the figure), the micro switch is disposed at a connection position between the upper cover 71 and the lower cover 72, and the micro switch is electrically connected to the power module 2, when the upper cover 71 is connected to the lower cover 72, the micro switch is squeezed by the upper cover 71 and the lower cover 72 together, so that the micro switch generates a sensing signal, the micro switch inputs the sensing signal into the power module 2, and the power module 2 can be started to supply power to the heating pipe 3. When the upper cover 71 is separated from the lower cover 72, no sensing signal is input to the power module 2 by the micro switch, the power module 2 is turned off, and the power module 2 cannot be started to supply power to the heating pipe 3. Through setting up micro-gap switch, when protection casing 7 is in the open mode, when upper cover 71 and lower cover 72 separation promptly, power module 2 can't start, and copper sheet 4 does not have the electric current to pass through, only is in the closed mode at protection casing 7, when upper cover 71 is connected with lower cover 72 promptly, power module 2 just allows to be started, and copper sheet 4 has the electric current to pass through. The microswitch structure can prevent the protective cover 7 from being opened under the power-on state, so that the safety of the electric heater is higher.

Further, in this embodiment, the electric heater further includes an indicator light, the indicator light is disposed outside the protection cover 7 and specifically located beside the protection cover 7, the micro switch is electrically connected to the indicator light, and when the micro switch outputs a signal, the indicator light is turned on to indicate that the protection cover 7 is in a closed state, otherwise, the indicator light is turned off to indicate that the protection cover 7 is in an open state, and an operator is prompted. Can indicate the switching state of operating personnel protection casing 7 through the pilot lamp, further improve electric heater's security.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the present disclosure, and in the absence of a contrary explanation, these directional terms are not intended to indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present disclosure.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present disclosure.

Claims (10)

1. An electric heater, comprising:

a housing having a cavity formed therein;

the power supply module is arranged in the cavity, one end of the power supply module is electrically connected with an external power supply, and the other end of the power supply module is provided with a first electric connection terminal;

the heating pipe is arranged in the cavity, and a second electric terminal is arranged on the heating pipe;

and one end of the copper sheet is electrically connected with the first electric connection terminal, and the other end of the copper sheet is electrically connected with the second electric connection terminal.

2. The electric heater of claim 1, wherein the first and second electrical terminals each comprise a terminal block and a post disposed on the terminal block; and wiring holes matched with the wiring terminals are formed at two ends of the copper sheet, and the wiring holes are sleeved on the wiring terminals.

3. The electric heater of claim 2, wherein a pair of elastic pieces is oppositely arranged on the outer walls of two sides of the terminal, the elastic pieces are electrically connected with the terminal, the elastic pieces are located at positions close to the terminal base, one end of each elastic piece, which is far away from the terminal base, is connected with the outer wall of the terminal, and the other end of each elastic piece is suspended.

4. The electric heater of claim 3, wherein the resilient tab is formed with a stepped bayonet at a position adjacent to the terminal block, and a distance between the bayonet and the terminal block end surface is smaller than a thickness of the copper tab.

5. The electric heater as claimed in any one of claims 2-4, wherein said copper sheet is in the form of a long sheet, and both ends of said copper sheet are bent toward the same side to form electric connection portions, and both said wiring holes are respectively provided on said electric connection portions at both ends.

6. The electric heater of claim 1, further comprising:

the protective cover is made of an insulating material and sleeved on the outer side of the copper sheet.

7. The electric heater of claim 6, wherein the protective cover is disc-shaped and includes an upper cover and a lower cover, the lower cover being coupled to the housing, the upper cover being removably coupled to the lower cover.

8. The electric heater of claim 7, wherein the upper housing and the lower housing are removably connected by a snap fit.

9. The electric heater of claim 7 or 8, further comprising:

the microswitch is arranged at the connecting position of the upper cover body and the lower cover body and is electrically connected with the power module.

10. The electric heater of claim 9, further comprising:

the indicating lamp is arranged outside the protective cover, and the micro switch is electrically connected with the indicating lamp.

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