A straight tube PTC water heater with waterproof grade IP67

Abstract

The application discloses a straight pipe type PTC water heater with a waterproof grade of IP67 and relates to the technical field of water heaters.The straight pipe type PTC water heater comprises a heating body, a plurality of wire outlet holes are formed in the heating body, a stainless steel pipe is sleeved with the heating body, head plastic parts and tail plastic parts are respectively connected to two ends of the heating body, a head wire outlet end plastic shell is connected to the head plastic parts through bolts, the head wire outlet end plastic shell is a hollow structure, one end of the stainless steel pipe is clamped with the head wire outlet end plastic shell, an annular groove is formed in one side of the head wire outlet end plastic shell, the annular groove is clamped with the stainless steel pipe, and the other end of the stainless steel pipe is connected with the tail plastic parts through bolts.The application can rectify a plurality of wire harnesses by arranging a circuit board, can simplify complex wiring into three-phase electric output, and then cooperates with the arrangement of a sealing structure to solve the problem that too many wire harnesses of a traditional heater cannot be waterproofed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PTC water heater structure, and particularly relates to a straight pipe type PTC water heater with a waterproof grade of IP67. BACKGROUND

[0002] A PTC liquid heater in a battery thermal management assembly of a commercial vehicle is used to heat antifreeze liquid in a battery box, and quickly raises the temperature of the antifreeze liquid to a certain temperature point under low temperature conditions, so that the battery is at an optimal charging or discharging temperature, which is beneficial to improve the charging and discharging efficiency of the battery and prolong the service life of the battery. A PTC liquid heater suitable for battery thermal management of a commercial vehicle is disclosed in CN 217504003U, which utilizes limited space to combine PTC heating modules into two or more modules, and the heating modules are flexibly connected through a wiring harness, so that more flexible grouping of the PTC heating modules can be realized, and 18 heating modules are divided into 6 groups, which saves space and improves the safety of high-voltage wiring. However, the heater has the following defects: too many heater outlet wire harnesses, which cannot be waterproofed. SUMMARY

[0003] The purpose of the present application is to provide a straight pipe type PTC water heater with a waterproof grade of IP67, which solves the technical problem of too many heater outlet wire harnesses that cannot be waterproofed.

[0004] The purpose of the present application can be achieved by the following technical solutions:

[0005] A straight pipe type PTC water heater with a waterproof grade of IP67, comprising a heating body, a plurality of outlet holes are formed in the heating body, a head plastic part and a tail plastic part are connected to both ends of the heating body through bolts, a stainless steel pipe is clamped between the head plastic part and the tail plastic part, the stainless steel pipe is sleeved on the heating body, a circuit board is arranged in the head plastic part, the circuit board is sleeved on the heating body, a wire harness is welded on the circuit board, the circuit board rectifies the wire harness, an exhaust hole, a low-voltage outlet hole, a high-voltage outlet hole and a glue injection hole are formed in the head plastic part, glue is injected into the glue injection hole, and a seal is formed between the head plastic part and the heating body.

[0006] As a further scheme of the present application: the low-voltage outlet hole is two, and the high-voltage outlet hole is three.

[0007] As a further scheme of the present application: the circuit board is a hollow structure, and the circuit board is sleeved on the heating body.

[0008] As a further scheme of the present application: six outlet holes penetrating through the heating body are formed in the heating body, and a wire harness is arranged in the outlet hole.

[0009] As a further scheme of the present application, the heat-generating body is integrally formed, and both ends of the heat-generating body are provided with sealing grooves, and sealing rings are installed in the sealing grooves.

[0010] As a further scheme of the present application, a waterproof air permeation valve for pressure relief and exhaust is threadedly connected to the tail of the stainless steel pipe.

[0011] As a further scheme of the present application, a nut is riveted to the inner wall of the stainless steel pipe, and the nut is matched with the waterproof air permeation valve.

[0012] As a further scheme of the present application, a heat insulation layer is pasted between the stainless steel pipe and the heat-generating body.

[0013] As a further scheme of the present application, the heat insulation layer is sponge.

[0014] As a further scheme of the present application, waterproof plugs are arranged in the low-voltage wire outlet hole and the high-voltage wire outlet hole, and the waterproof plugs waterproof the wire harness.

[0015] The present application has the following beneficial effects:

[0016] The present application can rectify multiple wire harnesses by arranging the circuit board, simplify the complex connection into three-phase power output, and then cooperate with the arrangement of the sealing structure to solve the problem that too many wire harnesses of the traditional heater cannot be waterproofed. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below with reference to the drawings.

[0018] Figure 1 is a structural schematic diagram of the whole application;

[0019] Figure 2 is a structural schematic diagram of one side of the head plastic part of the application;

[0020] Figure 3 is a surface structural schematic diagram of the heat-generating body of the application;

[0021] Figure 4 is an internal structural schematic diagram of the head wire outlet end plastic shell of the application;

[0022] Figure 5 is a structural schematic diagram of one side of the stainless steel pipe of the application;

[0023] Figure 6 is a structural schematic diagram of the whole heat-generating body of the application;

[0024] Figure 7 is a front structural schematic diagram of the circuit board of the application;

[0025] In the figure: 1, stainless steel pipe; 2, head plastic part; 3, tail plastic part; 4, heating body; 5, circuit board; 11, waterproof and breathable valve; 21, exhaust hole; 22, low-voltage outlet hole; 23, high-voltage outlet hole; 24, glue injection hole; 25, waterproof plug; 26, sealing ring; 27, annular groove; 41, outlet hole; 42, sealing groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1-7 As shown in the figure, the present application is a straight pipe type PTC water heater with waterproof grade IP67, which comprises a heating body 5, a plurality of outlet holes 51 are formed on the heating body 5, the head outlet wires are welded to the PCB board for arrangement and confluence; a temperature controller or a temperature sensor is built in the heating body 4 for monitoring temperature, both ends of the heating body 4 are connected with a head plastic part 2 and a tail plastic part 3 through bolts, the head plastic part 2 and the tail plastic part 3 are both black high-temperature-resistant plastic parts with good high-temperature resistance, annular grooves 27 are formed on the head plastic part 2 and the tail plastic part 3, a stainless steel pipe 1 is clamped between the head plastic part 2 and the tail plastic part 3, the stainless steel pipe 1 is sleeved on the heating body 4, a circuit board 5 is arranged in the head plastic part 2, the circuit board 5 is sleeved on the heating body 4, wires are welded on the circuit board 5, the circuit board 5 rectifies the wires, exhaust holes 21, low-voltage outlet holes 22, high-voltage outlet holes 23 and glue injection holes 24 are formed on the head plastic part 2, the glue injection holes 24 are filled with glue, the head plastic part 2 and the heating body 4 are sealed, and the glue injection holes 24 and the exhaust holes 21 are mainly used to realize waterproof of IP67 grade.

[0028] Six outlet holes 41 are formed on the heating body 4, wires are arranged in the outlet holes 41, six groups of PCT heating body wires can be combined into different wiring modes.

[0029] The low-voltage outlet holes 22 are two, and the high-voltage outlet holes 23 are three.

[0030] The circuit board 5 is a hollow structure, which is convenient for sleeving, and the outer diameter of the circuit board 5 is connected with the inner diameter of the head plastic part 2.

[0031] The heating body 4 is integrally formed, and both ends of the heating body 4 are provided with sealing grooves 42, sealing rings 26 are installed in the sealing grooves 42, and good sealing effect is formed.

[0032] A waterproof air valve 11 for pressure relief and exhaust is threadedly connected to the tail of the stainless steel pipe 1.

[0033] A nut is riveted to the inner wall of the stainless steel pipe 1, the nut is matched with the waterproof air valve 11, and the waterproof air valve 11 is convenient to disassemble.

[0034] A heat insulation layer is pasted between the stainless steel pipe 1 and the heating body 5. The heat insulation layer is sponge and is used for heat preservation. Waterproof plugs 25 are arranged in the low-voltage outlet hole 22 and the high-voltage outlet hole 23, and the waterproof plugs 25 are used for waterproof treatment of the wire harness.

[0035] Working principle of the present application: the wire harness is rectified into 3 or 4 main wires (3P or 3P+N) by a PCB board; the rectified wires are divided into 3 high-voltage main wires and 2 low-voltage temperature control wires, a wire hole structure is formed on a plastic part, waterproof sealing rings are used for waterproof treatment of the wire harness; a waterproof sealing ring is used for sealing between the heating body 4 and the plastic part, and then the whole is sealed by glue; a waterproof air valve is arranged at the tail, complete sealing will cause reduction of the PTC, and the PTC is easy to be broken under high pressure, so the waterproof air valve is used for pressure relief and exhaust.

[0036] The above has described one embodiment of the present application in detail, but the content is only the preferred embodiment of the present application, and cannot be considered as used for limiting the implementation range of the present application. Any equivalent change and improvement made according to the application range of the present application should still belong to the patent coverage range of the present application.

Claims

1. A straight tube type PTC water heater of waterproof grade IP67, comprising a heating body (4) with a plurality of wire outlet holes (41) formed thereon, characterized in that, The both ends of the heating body (4) are connected with head plastic part (2) and tail plastic part (3) through bolts respectively, the head plastic part (2) and the tail plastic part (3) are clamped with stainless steel pipe (1), the stainless steel pipe (1) is sleeved on the heating body (4), the inside of the head plastic part (2) is provided with circuit board (5), wire harness is welded on the circuit board (5), the circuit board (5) rectifies wire harness, the head plastic part (2) is provided with exhaust hole (21), low-voltage outlet hole (22), high-voltage outlet hole (23) and glue injection hole (24), the glue injection hole (24) is filled with glue, the head plastic part (2) and the heating body (4) form a seal; The wire harness is rectified by the circuit board (5), the rectified wire is divided into three high-voltage main wires and two low-voltage temperature control wires, the wire hole structure is made on the plastic part, and the wire harness is waterproof treated by using waterproof sealing ring; the heating body (4) and the plastic part are sealed by the waterproof sealing ring, and then the whole is filled with glue and sealed; The circuit board (5) is a hollow structure, and the circuit board (5) is sleeved on the heating body (4).

2. A straight tube PTC water heater of waterproof grade IP67 according to claim 1, characterized in that, The low-voltage outlet hole (22) is two, and the high-voltage outlet hole (23) is three.

3. A straight tube PTC water heater of waterproof grade IP67 according to claim 1, characterized in that, The heating body (4) is provided with six outlet holes (41) penetrating the heating body (4), and the outlet holes (41) are provided with wire harness.

4. A straight tube PTC water heater of waterproof grade IP67 according to claim 1, characterized in that, The heating body (4) is integrally formed, and the both ends of the heating body (4) are provided with sealing grooves (42), and the sealing grooves (42) are provided with sealing rings (26).

5. A straight tube PTC water heater of waterproof grade IP67 according to claim 1, characterized in that, The tail of the stainless steel pipe (1) is threadedly connected with a waterproof air valve (11) for pressure relief and exhaust.

6. A straight tube PTC water heater of waterproof grade IP67 according to claim 5, characterized in that, The inner wall of the stainless steel pipe (1) is riveted with a nut, and the nut is matched with the waterproof air valve (11).

7. A straight tube PTC water heater of waterproof grade IP67 according to claim 1, characterized in that, The stainless steel pipe (1) and the heating body (4) are pasted with a heat insulation layer.

8. A straight tube PTC water heater of waterproof grade IP67 according to claim 7, characterized in that, The heat insulation layer is sponge.

9. A straight tube PTC water heater of waterproof grade IP67 according to claim 1, characterized in that, The low-voltage outlet hole (22) and the high-voltage outlet hole (23) are provided with waterproof plugs (25), and the waterproof plugs (25) waterproof the wire harness.

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