PTC (Positive Temperature Coefficient) water heater with thin-wall heating core body

Abstract

The invention discloses a thin-wall heating core PTC water heater, which is characterized in that a thin-wall cavity (7) is fixedly connected with an injection molding base (10) in a sealing manner, a plurality of thin-wall heating core mounting holes (6) for accommodating heating bags (5) and electrode plates (27) are formed in the thin-wall cavity (7), and a plurality of heating shells (31) in the thin-wall cavity (7) are arranged in a staggered manner to form at least two channels for water inlet and outlet. The thickness of the heating shell (31) ranges from 0.3 mm to 0.6 mm. Heat resistance is reduced through the thin-wall structure, heat emitted by the heating bag is conducted to liquid flowing through the heating hole, so that the liquid is heated, rapid temperature rise of the liquid is achieved, 98% of the heat guided out by the PTC ceramic chip can be transmitted to the liquid flowing through the water channel, and the heat conduction efficiency is improved.

Description

Technical Field

[0001] The invention relates to a thin-wall heating core PTC water heater, belonging to the technical field of new energy electric heating. Background Art

[0002] Most common new energy PTC water heaters use heating packs and metal bases to achieve heat conduction. Since the metal base is high-pressure die-cast, the wall thickness is thick and the thermal resistance is increased, which reduces the efficiency of heat conduction and increases the loss of electric power. Since the metal base is high-pressure die-cast, the mold opening cost and maintenance cost are high, and the finished product has large defects and is prone to problems such as cold shut and voids. The metal material of the product itself has high thermal conductivity and strong electrical conductivity. It is heavy and cannot be lightweight, so the cost is high and it is difficult to popularize it. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a thin-walled heating core PTC water heater. The present invention is a water heating device that utilizes electrical energy to convert into thermal energy through a PTC ceramic sheet to heat the medium flowing through the heater. This device utilizes the positive temperature coefficient characteristic of the PTC ceramic, that is, the temperature no longer rises after being heated to a certain temperature, thereby improving the safety performance, solving the leakage, sealing and other defects of the previous products themselves, improving the safety performance of thermal conductivity and electrical conductivity, improving the heating efficiency of the PTC water heater, achieving lightweight, reducing costs, improving product performance, and reducing thermal resistance losses. Therefore, the device has a relatively wide range of applications.

[0004] Preferably, the present invention provides a thin-walled heating core PTC water heater, comprising a plurality of heating packs, a thin-walled cavity, an injection molding base, and an electrode sheet. The thin-walled cavity is sealed and fixedly connected to the injection molding base, and a plurality of thin-walled heating core mounting holes for accommodating the heating packs and the electrode sheet are provided on the thin-walled cavity. The staggered arrangement of the plurality of heating shells in the thin-walled cavity forms at least two channels for water inlet and outlet.

[0005] Preferably, the thickness of the heat generating shell is 0.3-0.6 mm.

[0006] Preferably, it comprises a sealing ring, a sealing groove and a water channel cavity, and the injection molding base is provided with a water inlet and a water outlet, and the water inlet and the water outlet are connected to the two ends of the channel respectively. The injection molding base is provided with a sealing groove, the sealing ring is arranged at the sealing groove, the thin-walled hole is sealed and fixedly connected to the injection molding base through the sealing ring, and the injection molding base has a water channel inner cavity inside which cooperates with a plurality of thin-walled shells of the heating core.

[0007] Preferably, it includes a thermistor wire, a water inlet temperature sensor, a manifold injection molded insert and a thermistor wire fixing clamp, the water inlet temperature sensor is installed on the manifold injection molded insert through the thermistor wire fixing clamp, the manifold injection molded insert is installed on the thin-walled hole and the injection molded base, and the manifold injection molded insert is provided with positive and negative electrode through holes matching the positive and negative electrodes of the heating pack.

[0008] Preferably, it includes a base, a plurality of limit stops for limiting the injection molding base, a high-voltage connector installation position and a low-voltage plug-in installation position, the base is provided with a sealing glue seam matching the injection molding base, a plurality of limit stops are fixedly arranged at both ends of the base, and the base is provided with a high-voltage connector installation position and a low-voltage plug-in installation position.

[0009] Preferably, it includes a diverter plate clamping position, a diverter plate welding position and a water outlet temperature sensor. The diverter plate injection molded insert is provided with a diverter plate clamping position that matches the positive and negative poles of the heating pack. The diverter plate injection molded insert is fixedly provided with the diverter plate welding position, and the water outlet temperature sensor is installed on the diverter plate injection molded insert.

[0010] Preferably, the thin-walled cavity includes a thin-walled heating core and a plurality of heating shells, the thin-walled heating core is provided with a plurality of heating pack accommodating chambers matching the heating shells, a plurality of heating shells are fixedly installed in the heating pack accommodating chambers, and a plurality of the heating packs are installed in the heating shells.

[0011] Preferably, it comprises a water inlet temperature test column and a water outlet temperature test column, the thin-wall heating core is provided with a water outlet thermistor mounting hole and a water inlet thermistor mounting hole, the water inlet temperature test column is fixedly mounted on the water inlet thermistor mounting hole, and the water outlet temperature test column is fixedly mounted on the water outlet thermistor mounting hole.

[0012] Preferably, it comprises a PTC ceramic sheet mounting sheet, a PTC ceramic sheet and a PTC ceramic sheet mounting cover plate, wherein the PTC ceramic sheet mounting sheet is provided with a PTC ceramic sheet mounting groove for accommodating the PTC ceramic sheet, the PTC ceramic sheet mounting cover plate is fixedly connected to the PTC ceramic sheet mounting sheet, and the PTC ceramic sheet mounting sheet and the PTC ceramic sheet mounting cover plate are installed in a heating shell.

[0013] The beneficial effects achieved by the present invention are: 1. The heating core of the present invention is formed by stamping and cold extrusion, and the wall thickness is 0.3-0.6 mm. The heating pack is inserted into the hole of the heating core and pressed tightly. The installed heating core is installed on the injection molding base with standard parts. Then, after all aspects are installed, water is passed through the water inlet and outlet. When the water flows through the thin-walled heating core, the heat is taken away to heat other products. Since the heating shell is thinned to improve the heating efficiency, 98% of the heat derived from the PTC ceramic sheet can be transmitted to the liquid flowing through the waterway, thereby improving the thermal conductivity efficiency. 2. Since the wall thickness of the heating core is thin and closely fits the heating pack, the heat conduction link can be reduced, so that all the heat energy can be used for heating the medium; 3. The base adopts injection molded inserts to reduce costs and weight. The metal thin-walled shell and the injection molded base are sealed with sealing rings to improve the reliability of sealing, which significantly improves the thermal conductivity and insulation safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 is a structural diagram of some embodiments of the present application; Figure 2 is a structural diagram of some embodiments of the present application; Figure 3 is a structural diagram of some embodiments of the present application; Figure 4 is a structural diagram of some embodiments of the present application; Meaning of the reference numerals: 1. thermistor wire; 2. water inlet temperature sensor; 3. injection molded insert of manifold; 4. thermistor wire fixing clip; 5. heating pack; 6. thin-wall heating core mounting hole; 7. thin-wall hole; 8. sealing ring; 9. sealing groove; 10. injection molding base; 11. water inlet; 12. water outlet; 13. product fixing hole; 14. waterway cavity; 15. sealing glue seam; 16. base; 17. limit stop; 18. high-voltage connector mounting position; 19. low-voltage connector mounting position; 20. Flow plate position; 21. Manifold welding position; 22. Water outlet temperature sensor; 23. Thin-walled heating core; 24. Electrical installation cavity; 25. Thin wall; 26. Heating electrode; 27 Electrode sheet; 28. Manifold welding groove; 29. ​​Water inlet temperature test column; 30. Water outlet temperature test column; 31. Heating shell; 32. PTC ceramic sheet mounting sheet; 33. PTC ceramic sheet; 34. PTC ceramic sheet mounting cover; 35. Water inlet thermistor mounting hole; 36. Water outlet thermistor mounting hole. DETAILED DESCRIPTION

[0016] If the descriptions of "first" and "second" etc. are involved in the present invention, they are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0017] See also Figure 1 The present application provides a thin-walled heating core PTC water heater, comprising a plurality of heating packs 5, a thin-walled cavity 7, an injection molding base 10, and an electrode sheet 27. The thin-walled cavity is sealed and fixedly connected to the injection molding base. The thin-walled cavity is provided with a plurality of thin-walled heating core mounting holes for accommodating the heating packs and the electrode sheet. The staggered arrangement of the plurality of heating shells in the thin-walled cavity forms at least two channels for water inlet and outlet. The injection molding base 10 is a rectangular parallelepiped with a cavity for matching the thin-walled cavity 7 on one side.

[0018] In the embodiment of the present application, the thickness of the heating shell is 0.3-0.6mm. The present invention changes the heating core from the original metal high-pressure die-casting to a thin-walled monomer with a wall thickness of 0.3~0.6mm, and changes the metal base to a plastic injection-molded base. The thin-walled heating shell and the base are sealed with a sealing ring. Since the heating shell is thinned to improve the heating efficiency, 98% of the heat derived from the PTC ceramic sheet can be transmitted to the liquid flowing through the waterway, thereby improving the thermal conductivity efficiency; since the heating core has a thin wall thickness and fits tightly with the heating pack, the heat conduction link can be reduced, thereby all the heat energy can be used for heating the medium; in the present invention, the base adopts an injection-molded insert to reduce costs and reduce weight, and the metal thin-walled shell and the injection-molded base are sealed with a sealing ring to improve the reliability of the seal, which significantly improves the thermal conductivity and insulation safety performance. The present invention is mainly aimed at thin-walled heating cores, which utilize their own thin-walled structure to reduce thermal resistance and then transfer the heat emitted by the heating pack to the liquid flowing through the heating hole, thereby heating the liquid and achieving rapid temperature rise of the liquid. Since the base sealing ring is used to seal the cover, the performance is improved, and the base adopts an injection molded base to reduce heat loss and improve the safety performance of the appliance. Because the heating core is a thin-walled structure, the weight of the entire heating device is also reduced. It is convenient for popularization and reduces costs. The present invention needs to protect the content of the thin-walled heating core, which can not only improve the heating efficiency and reduce the weight but also reduce the cost. That is, the heating core is changed from the original metal base high-pressure die-casting to a thin-walled stamping form, which also reduces the development of molds.

[0019] In the embodiment of the present application, a sealing ring 8, a sealing groove 9 and a water channel cavity 14 are included. The injection molding base 10 is provided with a water inlet 11 and a water outlet 12. The water inlet 11 and the water outlet 12 are connected to the two ends of the channel respectively. The injection molding base 10 is provided with a sealing groove 9, the sealing ring 8 is arranged at the sealing groove 9, the thin-walled hole 7 is sealed and fixedly connected to the injection molding base 10 through the sealing ring 8, and the injection molding base 10 is provided with a water channel cavity 14 matched with a plurality of heating core thin-wall shells 36, and the water channel cavity 14 and the gap between the heating shell 31 cooperate to form a channel for water inlet and outlet.

[0020] In the embodiment of the present application, it includes a thermistor wire 1, a water inlet temperature sensor 2, a diverter plate injection molded insert 3 and a thermistor wire fixing clip 4, the water inlet temperature sensor 2 is installed on the diverter plate injection molded insert 3 through the thermistor wire fixing clip 4, the diverter plate injection molded insert 3 is installed on the thin-walled hole 7 and the injection molding base 10, the diverter plate injection molded insert 3 is provided with positive and negative electrode through holes matching the positive and negative electrodes of the heating pack 5, and the diverter plate injection molded insert 3 is an integrally cast plate.

[0021] In the embodiment of the present application, it includes a base 16, a plurality of limit stops 17 for limiting the injection molding base 10, a high-voltage connector mounting position 18 and a low-voltage plug-in mounting position 19, the base 16 is provided with a sealing glue seam 15 that matches the injection molding base 10, a plurality of limit stops 17 are fixedly arranged at both ends of the base 16, the base 16 is provided with a high-voltage connector mounting position 18 and a low-voltage plug-in mounting position 19, the base 16 has an outer shape that is approximately a rectangular parallelepiped, the limit stop 17 can be a rod, and the high-voltage connector mounting position 18 and the low-voltage plug-in mounting position 19 can be grooves.

[0022] In the embodiment of the present application, it includes a diverter plate clamping position 20, a diverter plate welding position 21 and a water outlet temperature sensor 22. The diverter plate injection molded insert 3 is provided with a diverter plate clamping position 20 that matches the positive and negative poles of the heating pack 5. The diverter plate clamping position 20 is a through hole. The diverter plate injection molded insert 3 is fixedly provided with the diverter plate welding position 21. The diverter plate welding position 21 is a Y-shaped plate. The water outlet temperature sensor 22 is installed on the diverter plate injection molded insert 3.

[0023] In the embodiment of the present application, the thin-walled cavity 7 includes a thin-walled heating core 23 and a plurality of heating shells 31, the thin-walled heating core 23 is provided with a plurality of heating pack accommodating chambers cooperating with the heating shells 31, a plurality of heating shells 31 are fixedly installed in the heating pack accommodating chambers, a plurality of the heating packs 5 are installed in the heating shells 31, the thin-walled heating core 23 is a flat plate material, and the heating shell 31 is a rectangular parallelepiped with a hollow interior.

[0024] In the embodiment of the present application, a water inlet temperature test column 29 and a water outlet temperature test column 30 are included. A water outlet thermistor mounting hole 37 and a water inlet thermistor mounting hole 35 are provided on the thin-walled heating core 23. The water inlet temperature test column 29 is fixedly installed on the water inlet thermistor mounting hole 35, and the water outlet temperature test column 30 is fixedly installed on the water outlet thermistor mounting hole 37. The water inlet temperature test column 29 and the water outlet temperature test column 30 are columnar rods.

[0025] In the embodiment of the present application, it includes a PTC ceramic sheet mounting sheet 32, a PTC ceramic sheet 33 and a PTC ceramic sheet mounting cover plate 34. The PTC ceramic sheet mounting sheet 32 ​​is provided with a PTC ceramic sheet mounting groove for accommodating the PTC ceramic sheet 33. The PTC ceramic sheet mounting cover plate 34 is fixedly connected to the PTC ceramic sheet mounting sheet 32. The PTC ceramic sheet mounting sheet 32 ​​and the PTC ceramic sheet mounting cover plate 34 are installed in the heating shell 31. The PTC ceramic sheet mounting sheet 32 ​​is a rectangular plate, and the PTC ceramic sheet mounting cover plate 34 is a rectangular plate.

[0026] It includes an electrical installation cavity 24 and a manifold welding groove 28 . The lower end of the base 16 is provided with an electrical installation cavity 24 for accommodating the electrical appliance, and the injection molding base 10 is provided with a manifold welding groove 28 .

[0027] The injection molding base 10 is provided with a fixing hole 13 for fixing the product to the automobile, a cavity using the thin wall 25 is formed between the injection molding base 10 and the heating shell 31, and a heating electrode 26 is provided on the electrode sheet 27. There are many types of thermistor wire 1, water inlet temperature sensor 2, thermistor wire fixing clip 4, heating pack 5, sealing ring 8, water outlet temperature sensor 22, electrode sheet 27, PTC ceramic sheet mounting sheet 32, and PTC ceramic sheet 33 that can be used in the prior art. Those skilled in the art can select them according to actual needs, and no examples are given in this embodiment.

[0028] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0029] Those skilled in the art will readily appreciate other embodiments of the invention after considering the specification and practicing the invention invented herein. This application is intended to cover any variations, uses or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art that are not invented by the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the invention are indicated by the claims.

[0030] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", "connected", and "matched" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two elements, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments of the present invention, only the structures involved in the embodiments of the present invention are involved, and other structures can refer to the general design; the above specific implementation methods further explain the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific implementation methods of the present application and are not used to limit the protection scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.

Claims

1. A thin-walled heating core PTC water heater, characterized in that: The invention comprises a plurality of heating packs (5), a thin-walled cavity (7), an injection molding base (10) and an electrode sheet (27); the thin-walled cavity (7) is sealed and fixedly connected to the injection molding base (10); a plurality of thin-walled heating core mounting holes (6) for accommodating the heating packs (5) and the electrode sheet (27) are provided on the thin-walled cavity (7); and a plurality of heating shells (31) in the thin-walled cavity (7) are staggeredly arranged to form at least two channels for water inlet and outlet.

2. A thin-walled heating core PTC water heater according to claim 1, characterized in that: The thickness of the heating shell (31) is 0.3-0.6 mm.

3. A thin-walled heating core PTC water heater according to claim 1, characterized in that: It comprises a sealing ring (8), a sealing groove (9) and a water channel cavity (14); a water inlet (11) and a water outlet (12) are provided on the injection molding base (10); the water inlet (11) and the water outlet (12) are respectively connected to the two ends of the channel. The injection molding base (10) is provided with a sealing groove (9), the sealing ring (8) is arranged at the sealing groove (9), the thin-walled cavity (7) is sealed and fixedly connected to the injection molding base (10) via the sealing ring (8), and the injection molding base (10) is provided with a water channel cavity (14) inside which cooperates with a plurality of heating core thin-walled shells (36).

4. A thin-walled heating core PTC water heater according to claim 1, characterized in that: The invention comprises a thermistor wire (1), a water inlet temperature sensor (2), a manifold injection molded insert (3) and a thermistor wire fixing clamp (4), wherein the water inlet temperature sensor (2) is mounted on the manifold injection molded insert (3) via the thermistor wire fixing clamp (4), the manifold injection molded insert (3) is mounted on the thin-walled cavity (7) and the injection molded base (10), and the manifold injection molded insert (3) is provided with positive and negative electrode through holes matching the positive and negative electrodes of the heating pack (5).

5. A thin-walled heating core PTC water heater according to claim 1, characterized in that: The invention comprises a base (16), a plurality of limit stops (17) for limiting the position of the injection molding base (10), a high-voltage connector installation position (18) and a low-voltage plug-in installation position (19); a sealing glue seam (15) matching the injection molding base (10) is provided on the base (16); a plurality of limit stops (17) are fixedly arranged at two ends of the base (16); and a high-voltage connector installation position (18) and a low-voltage plug-in installation position (19) are provided on the base (16).

6. A thin-walled heating core PTC water heater according to claim 4, characterized in that: It comprises a manifold plate clamping position (20), a manifold plate welding position (21) and a water outlet temperature sensor (22); the manifold plate injection molded insert (3) is provided with a manifold plate clamping position (20) that matches the positive and negative electrodes of the heating pack (5); the manifold plate injection molded insert (3) is fixedly provided with the manifold plate welding position (21); and the water outlet temperature sensor (22) is mounted on the manifold plate injection molded insert (3).

7. A thin-walled heating core PTC water heater according to claim 1, characterized in that: The thin-walled cavity (7) comprises a thin-walled heating core (23) and a plurality of heating shells (31); the thin-walled heating core (23) is provided with a plurality of heating pack accommodating chambers matching the heating shells (31); the plurality of heating shells (31) are fixedly installed in the heating pack accommodating chambers; and the plurality of heating packs (5) are installed in the heating shells (31).

8. A thin-walled heating core PTC water heater according to claim 1, characterized in that: It comprises a water inlet temperature test column (29) and a water outlet temperature test column (30); the thin-walled heating core (23) is provided with a water outlet thermistor mounting hole (36) and a water inlet thermistor mounting hole (35); the water inlet temperature test column (29) is fixedly mounted on the water inlet thermistor mounting hole (35); and the water outlet temperature test column (30) is fixedly mounted on the water outlet thermistor mounting hole (36).

9. A thin-walled heating core PTC water heater according to claim 7, characterized in that: The invention comprises a PTC ceramic sheet mounting sheet (32), a PTC ceramic sheet (33) and a PTC ceramic sheet mounting cover plate (34); the PTC ceramic sheet mounting sheet (32) is provided with a PTC ceramic sheet mounting groove for accommodating the PTC ceramic sheet (33); the PTC ceramic sheet mounting cover plate (34) is fixedly connected to the PTC ceramic sheet mounting sheet (32); and the PTC ceramic sheet mounting sheet (32) and the PTC ceramic sheet mounting cover plate (34) are mounted in a heating shell (31).

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