Instant electric water heater

Abstract

An instant electric water heater comprises a shell, a water inlet connector, a water outlet connector, a core body with a spiral water tank, a circular film heating pipe, a wiring terminal, a temperature sensor and a main control board, the temperature sensor comprises a copper wire and an insulating shell, the core body is arranged in the circular film heating pipe and matched with the inner wall of the circular film heating pipe, and the main control board is arranged in the circular film heating pipe. The water inlet connector and the water outlet connector are inserted into the two ends of the circular film heating pipe respectively and are sealed. The water inlet connector and the water outlet connector extend out of the bottom and the top of the shell respectively. The wiring terminal surrounds the circular film heating tube and is connected with the main control board; the copper wire is wound on the circular film heating tube for a plurality of circles, two ends of the copper wire are connected with the main control board, and the insulating shell comprises the copper wire which is in insulating fit with the circular film heating tube. The contact area of the copper wire of the temperature sensor and the circular film heating tube is large, the temperature is judged according to the resistance change of the copper wire generated by the temperature change, and the temperature is linearly changed and is accurate and reliable; the service life is long.

Description

Technical Field

[0001] The utility model relates to the field of household electric heating, in particular to an electric water heating device connected with a faucet. Background Art

[0002] The current prior art is Chinese Patent 201620683425.1, an instant heating combined heating tube, comprising an outer shell, a thick film instant heating tube inserted in the outer shell, a central screw inserted in the heating tube, and end covers sealed at the bottom and top ends of the outer shell; a groove in the shape of a rotating body is provided at the end of the central screw, and the groove makes the side wall of the end of the central screw gradually thicken along the axial direction, and the end cover is provided with an annular flange extending into the heating tube, the annular flange extends into the groove and radially squeezes the side wall of the end of the central screw, so that the side wall of the end of the central screw is close to the inner wall of the heating tube, that is, the annular flange extending into the groove converts the axial displacement into radial displacement, drives the outer wall of the groove to be close to the inner wall of the heating tube, and fixes the central screw in the heating tube. Utility Model Content

[0003] The purpose of the utility model is to provide an instant electric water heater which has the characteristic of accurate temperature control.

[0004] The utility model is realized in this way: an instant electric water heater, which is special in that:

[0005] It includes a housing, a water inlet connector, a water outlet connector, a core with a spiral water tank, a circular membrane heating tube, a wiring terminal, a temperature sensor and a main control board.

[0006] The temperature sensor consists of copper wire and insulating shell.

[0007] The core is arranged in the circular membrane heating tube, and the core is matched with the inner wall of the circular membrane heating tube. The water inlet joint and the water outlet joint are respectively inserted into the two ends of the circular membrane heating tube and sealed. The water inlet joint and the water outlet joint extend from the bottom and the top of the outer shell respectively; the wiring terminal surrounds the circular membrane heating tube and is connected to the main control board; the copper wire is wrapped around the circular membrane heating tube for several turns and the two ends are connected to the main control board. The insulating shell includes the copper wire, and the copper wire is insulated and matched with the circular membrane heating tube.

[0008] Preferably: a water inlet guide seat is provided in the water outlet end of the water inlet joint, and the water inlet guide seat comprises a bottom circular hole provided in the center and a water inlet hole provided around the circular hole;

[0009] The water outlet joint is provided with a water outlet guide seat in the water inlet end, and the water outlet guide seat includes a top circular hole arranged in the center and water outlet holes arranged around the circular hole;

[0010] Two ends of the core body are provided with half shafts, which are rotatably matched or fixed with the bottom circular hole and the top circular hole.

[0011] Preferably, it also includes a magnetic sensing component, a magnetic rotor and a rotor seat, and a rotating shaft hole and a water guide hole are provided on the bottom plate of the rotor seat; the magnetic sensing component is a Hall sensor or a reed switch;

[0012] The magnetic rotor is arranged in the rotor seat, and the rotor shaft is rotatably matched with the rotating shaft hole and the bottom circular hole. The rotor seat is embedded in the water inlet joint, and the magnetic induction component is arranged in the shell and matched with the magnetic rotor.

[0013] Preferably, the wiring terminal comprises a circular ring portion with an opening, a fastening plate provided at one end of the opening, and a wiring board provided at the other end of the opening.

[0014] The annular portion surrounds the circular film heating tube, the screws pass through the wiring board and the fastening plate and are screwed with the nuts, and the suspended end of the wiring board is electrically connected to the main control board.

[0015] Preferably: the wiring terminals are provided with two terminals respectively arranged at the upper end and the lower end;

[0016] Or there are three or more terminal blocks.

[0017] Preferably: the water inlet joint and the water outlet joint are provided with a water inlet flange and a water outlet flange respectively, and the water inlet flange and the water outlet flange are provided with connecting holes respectively;

[0018] Also includes studs and nuts,

[0019] One end of the stud bolt passes through the water inlet flange and is screwed with the nut, and the other end passes through the water outlet flange and is screwed with the nut.

[0020] Preferably, it also includes a seat plate, one end of which is provided with two arc-shaped holes and the other end of which is provided with a slot;

[0021] The arc-shaped hole is fixedly engaged with the stud bolt, and the main control board is embedded in the card slot.

[0022] Preferably, two temperature sensors are provided, one is provided at the water outlet end of the circular membrane heating tube, and the other is provided at the water inlet end of the circular membrane heating tube.

[0023] Preferably: the shell comprises a shell body with upper and lower openings, a top cover and a bottom cover,

[0024] The top cover and the bottom cover are respectively buckled with the top and the bottom of the shell body and are detachable, and the water inlet joint and the water outlet joint extend from the bottom cover and the top cover respectively.

[0025] The utility model discloses an instant electric water heater. The contact area between the copper wire of the temperature sensor and the circular film heating tube is large. The temperature is judged by utilizing the change of the copper wire resistance caused by the temperature change. The temperature changes linearly, accurately and reliably, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the utility model.

[0027] Figure 2 yes Figure 1 A-A view of.

[0028] Figure 3 yes Figure 2 B-B view.

[0029] Figure 4 yes Figure 2 C-C view of the .

[0030] Figure 5 yes Figure 2 D-D view.

[0031] Figure 6 It is a stereogram of the utility model.

[0032] Figure 7 It is one of the three-dimensional exploded views of the utility model.

[0033] Figure 8 This is the second three-dimensional exploded view of the present utility model.

[0034] Fig. 9 This is the third three-dimensional exploded view of the present utility model. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1 , Figure 2 As shown, an instant electric water heater includes a housing 1, a water inlet connector 2, a water outlet connector 3, a core 4 with a spiral water groove, a circular film heating tube 5, a terminal 6, a temperature sensor 7 and a main control board 8.

[0038] like Figure 4As shown, the temperature sensor 7 includes a copper wire 71 and an insulating shell 72, the insulating shell 72 includes a superior plate-shaped shell portion 721 and fastening plates 722 arranged on both sides of the opening end, the superior plate-shaped shell portion includes a copper wire, and a screw passes through the fastening plate and is screwed with a nut to achieve fixation; the insulating shell 72 has a heat dissipation function or has no heat dissipation function;

[0039] The core 4 is arranged in the circular membrane heating tube 5, and the core 4 cooperates with the inner wall of the circular membrane heating tube 5. The water inlet joint 2 and the water outlet joint 3 are respectively inserted into the two ends of the circular membrane heating tube 5 and sealed. The water inlet joint 2 and the water outlet joint 3 extend from the bottom and the top of the shell 1 respectively; the terminal 6 surrounds the circular membrane heating tube 5 and is connected to the main control board 8; the copper wire 71 is wrapped around the circular membrane heating tube 5 for several turns and the two ends are connected to the main control board 8. The insulating shell includes the copper wire 71, and the copper wire 71 is insulated and matched with the circular membrane heating tube 5. The superior plate-shaped shell part 721 wraps the copper wire 71, and the screw passes through the fastening plate 72 and is screwed with the nut. The temperature sensor adopts such a structure, and the temperature detection is accurate and the service life is long.

[0040] As a further improvement of the utility model: the water outlet end of the water inlet joint 2 is provided with a water inlet guide seat, and the water inlet guide seat includes a bottom circular hole 21 arranged at the center and a water inlet hole 22 arranged around the circular hole;

[0041] The water outlet joint 3 is provided with a water outlet seat in the water inlet end, and the water outlet seat includes a top circular hole 31 arranged in the center and a water outlet hole 32 arranged around the circular hole;

[0042] The core body 4 is provided with half shafts at both ends, the half shafts are fixed to the bottom circular hole 21 and the top circular hole 31, and the outer circumferential surface of the core body 4 and the inner wall plate of the circular film heating tube are in contact or have a gap;

[0043] Alternatively, the semi-axle rotates with the bottom circular hole 21 and the top circular hole 31 to achieve rapid water discharge; the outer circumferential surface of the core 4 fits or has a gap with the inner wall of the circular membrane heating tube.

[0044] As a further improvement of the utility model: it also includes a magnetic induction component, a magnetic rotor 91 and a rotor seat 92, and the rotor seat 92 is provided with a shaft hole 921 and a water guide hole 922; the magnetic induction component is a Hall sensor or a reed switch;

[0045] The rotor shaft of the magnetic rotor is rotatably matched with the shaft hole 921 and the bottom circular hole 21, the rotor seat is embedded in the water inlet joint 2, and the magnetic induction component is arranged in the housing 1 and matched with the magnetic rotor 91;

[0046] With such a design, water flows out of the faucet, water enters the water inlet connector 2, the water flow drives the magnetic rotor to rotate, the magnetic sensing component receives the magnetic signal and transmits it to the main control board 8, thereby realizing automatic control.

[0047] like Figure 3As shown, the terminal 6 comprises a circular ring portion 61 with an opening, a fastening plate 62 provided at one end of the opening, and a terminal plate 63 provided at the other end of the opening, and the length of the terminal plate 63 is greater than the length of the fastening plate 62; the terminal 6 is made of a metal plate, preferably copper; it can also be made of stainless steel or aluminum;

[0048] The annular portion 61 surrounds the circular film heating tube 5, and the screw passes through the terminal board 63 and the fastening plate 62 and is screwed into the nut. The suspended end of the terminal board 63 is electrically connected to the main control board 8, that is, the terminal board 63 is inserted into the socket on the main control board and is electrically connected.

[0049] The said connecting terminal 6 is provided with two terminals respectively arranged at the upper end and the lower end of the circular film heating tube, or in other words: the upper half and the lower half;

[0050] Alternatively, the number of the wiring terminals 6 may be three, four or five. Such a design facilitates temperature regulation.

[0051] As a further improvement of the utility model: the water inlet joint 2 and the water outlet joint 3 are respectively provided with a water inlet flange 23 and a water outlet flange 33, and the water inlet flange and the water outlet flange are respectively provided with a connecting hole;

[0052] It also includes a stud bolt 101 and a nut 102,

[0053] One end of the stud bolt 101 passes through the connection hole of the water inlet flange 23 and is screwed with the nut 102, and the other end passes through the connection hole on the water outlet flange 33 and is screwed with the nut. The water inlet joint, the core body, the circular membrane heating tube and the water outlet joint are connected into one.

[0054] The utility model is further improved: it also includes a seat plate 11, such as Figure 5 As shown, one end of the seat plate 11 is provided with two arc-shaped holes 111, and the other end is provided with a slot 112;

[0055] The arc-shaped hole 111 is fixed with the stud bolt 101 , and the main control board 8 is engaged with the slot 112 .

[0056] As a further improvement of the utility model: two temperature sensors 7 are provided, one is provided at the water outlet end of the circular membrane heating tube 5, and the other is provided at the water inlet end of the circular membrane heating tube 5. The temperature sensor 7 provided at the water outlet end detects the hot water outlet temperature and is used to adjust the set water temperature; the temperature sensor 7 provided at the water inlet end is used to prevent dry burning.

[0057] The housing 1 includes a housing body 1A with upper and lower openings, a top cover 1B and a bottom cover 1C.

[0058] The top cover 1B and the bottom cover 1C are respectively buckled with the top and bottom of the shell body 1A and are detachable, and the water inlet connector 2 and the water outlet connector 3 extend from the bottom cover and the top cover respectively.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An instant electric water heater, characterized in that: It includes a housing, a water inlet connector, a water outlet connector, a core with a spiral water tank, a circular membrane heating tube, a wiring terminal, a temperature sensor and a main control board. The temperature sensor consists of copper wire and insulating shell. The core body is arranged in the circular membrane heating tube, and the core body is matched with the inner wall of the circular membrane heating tube. The water inlet joint and the water outlet joint are respectively inserted into the two ends of the circular membrane heating tube and sealed. The water inlet joint and the water outlet joint extend from the bottom and the top of the outer shell respectively; the wiring terminal surrounds the circular membrane heating tube and is connected to the main control board; the copper wire is wrapped around the circular membrane heating tube for several turns and the two ends are connected to the main control board. The insulating shell includes the copper wire, and the copper wire is insulated and matched with the circular membrane heating tube.

2. The instant electric water heater according to claim 1, characterized in that: The water outlet end of the water inlet joint is provided with a water inlet guide seat, which includes a bottom circular hole arranged in the center and a water inlet hole arranged around the circular hole; The water outlet joint is provided with a water outlet guide seat in the water inlet end, and the water outlet guide seat includes a top circular hole arranged in the center and water outlet holes arranged around the circular hole; Two ends of the core body are provided with half shafts, which are rotatably matched or fixed with the bottom circular hole and the top circular hole.

3. The instant electric water heater according to claim 2, characterized in that: It also includes a magnetic sensing component, a magnetic rotor and a rotor seat, wherein the rotor seat is provided with a shaft hole and a water guide hole; the magnetic sensing component is a Hall sensor or a reed switch; The magnetic rotor is arranged in the rotor seat, and the rotor shaft is rotatably matched with the rotating shaft hole and the bottom circular hole. The rotor seat is embedded in the water inlet joint, and the magnetic induction component is arranged in the shell and matched with the magnetic rotor.

4. The instant electric water heater according to claim 1, characterized in that: The terminal comprises a circular ring portion with an opening, a fastening plate arranged at one end of the opening, and a wiring board arranged at the other end of the opening. The annular portion surrounds the circular film heating tube, the screws pass through the wiring board and the fastening plate and are screwed with the nuts, and the suspended end of the wiring board is electrically connected to the main control board.

5. The instant electric water heater according to claim 1, characterized in that: The wiring terminals are provided with two terminals respectively arranged at the upper end and the lower end; Or there are three or more terminal blocks.

6. The instant electric water heater according to claim 1, characterized in that: The water inlet joint and the water outlet joint are provided with a water inlet flange and a water outlet flange respectively, and the water inlet flange and the water outlet flange are provided with a connecting hole respectively; Also includes studs and nuts, One end of the stud bolt passes through the water inlet flange and is screwed with the nut, and the other end passes through the water outlet flange and is screwed with the nut.

7. The instant electric water heater according to claim 6, characterized in that: It also includes a seat plate, one end of which is provided with two arc-shaped holes and the other end of which is provided with a slot; The arc-shaped hole is fixed with a stud bolt, and the main control board is engaged with the card slot.

8. The instant electric water heater according to claim 1, characterized in that: The temperature sensors are provided with two, one is provided with the water outlet end of the circular membrane heating tube, and the other is provided with the water inlet end of the circular membrane heating tube.

9. An instant electric water heater according to claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that: The shell comprises a shell body with upper and lower openings, a top cover and a bottom cover. The top cover and the bottom cover are respectively buckled with the top and the bottom of the shell body and are detachable, and the water inlet joint and the water outlet joint extend from the bottom cover and the top cover respectively.

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