A water heater

Abstract

The utility model discloses a water heater, its characterized in that: including base, encased resistance wire, upper cover, encased resistance wire is located the top surface of base, upper cover cover is established on encased resistance wire, and with encased resistance wire welding connection, upper cover inner wall with encased resistance wire outside between having outside circulating water passage, the middle part of encased resistance wire has inside circulating water passage, and inside circulating water passage is linked with outside circulating water passage, and upper cover has the water inlet that corresponds with inside circulating water passage on, and upper cover has the water outlet that corresponds with outside circulating water passage on, and base bottom has the accommodating cavity, is provided with PCB board in accommodating cavity, base top surface still is provided with high -voltage connector and low -voltage connector, and a plurality of electronic components are integrated on the PCB board, and encased resistance wire, high -voltage connector, low -voltage connector all electricity is connected on the PCB board. Advantageous effects include: the sealing surface good sealing property is formed through welding, and the heat exchange area is big, improves the heat flow field uniformity, prevents partial surface dry burning.

Description

Technical Field

[0001] This utility model relates to the field of heaters, specifically to a water heater. Background Technology

[0002] Traditional resistance wire water heaters mainly rely on sealing rings and screws for sealing, which poses a significant risk of coolant leakage if the dimensions are not correct or after prolonged use. In addition, existing resistance wire water heaters use resistance wires to directly heat the coolant, which means the resistance wires are in direct contact with the water. This can easily lead to uneven heating and dry burning due to air bubbles forming on the surface of the resistance wires. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this utility model provides a water heater with good sealing performance, uniform heat flow field, and compact structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A water heater, characterized in that it comprises a base, a cast resistance wire, and a top cover. The cast resistance wire is disposed on the top surface of the base, and the top cover covers the cast resistance wire and is welded to it. An outer circulating water channel is provided between the inner wall of the top cover and the outer side of the cast resistance wire. An inner circulating water channel is provided in the middle of the cast resistance wire, and the inner circulating water channel communicates with the outer circulating water channel. The top cover has an inlet corresponding to the inner circulating water channel and an outlet corresponding to the outer circulating water channel. The bottom of the base has a receiving cavity, and a PCB board is disposed in the receiving cavity. A high-voltage connector and a low-voltage connector are also disposed on the top surface of the base. Multiple electronic components are integrated on the PCB board, and the cast resistance wire, the high-voltage connector, and the low-voltage connector are all electrically connected to the PCB board.

[0006] Furthermore, an IGBT module is disposed at the bottom of the cast resistance wire via thermally conductive adhesive, and the IGBT module is electrically connected to the PCB board.

[0007] Furthermore, a rear cover is provided at the bottom of the base, and the rear cover is connected to the base by a four-sided snap-fit ​​structure to cover the lower part of the receiving cavity.

[0008] Furthermore, the base has connecting lugs on its edge, and the connecting lugs are provided with mounting holes.

[0009] Furthermore, the cast resistance wire has multiple raised fins.

[0010] The beneficial effects of this utility model include: by forming a sealing surface through welding, the hidden danger of sealing failure is avoided, and the reliability of the product is improved; by casting the resistance wire, the heat exchange area is increased from 11260 to 53039 square millimeters, improving the uniformity of the heat flow field and preventing the occurrence of local surface bubbles and dry burning of the resistance wire. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the encapsulated resistance wire structure of this utility model;

[0013] Figure 3 This is a cross-sectional structural diagram of the present invention. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0015] One such Figure 1-3 The water heater shown includes a base 1, a cast resistance wire 2, and a top cover 3. The cast resistance wire 2 is integrally formed using a casting process, combining resistance wire and a brazable, high thermal conductivity die-casting material. The cast resistance wire 2 has multiple raised fins 13, thereby increasing the heat exchange area and improving the uniformity of the heat flow field. The cast resistance wire 2 is located on the top surface of the base 1, and the top cover 3 covers the cast resistance wire 2. The top cover 3 and the cast resistance wire 2 are connected by brazing to form a seal, providing good sealing performance. An outer circulating water channel 4 is located between the inner wall of the top cover 3 and the outer side of the cast resistance wire 2. An inner circulating water channel 5 is located in the middle of the cast resistance wire 2, and the inner circulating water channel 5 communicates with the outer circulating water channel 4. The top cover 3 has an inlet 6 corresponding to the inner circulating water channel 5 and an outlet 7 corresponding to the outer circulating water channel 4. The inlet 6 and outlet 7 are located on the same side.

[0016] The base 1 has a receiving cavity at its bottom, within which a PCB board 8 is installed. The top surface of the base 1 also has a high-voltage connector 9 and a low-voltage connector 10, used for connecting the power supply and controller, respectively. Multiple electronic components are integrated on the PCB board 8. The cast resistance wire 2, the high-voltage connector 9, and the low-voltage connector 10 are all electrically connected to the PCB board 8, allowing for circuit connectivity. An IGBT module 11 is mounted on the bottom of the cast resistance wire 2 using thermally conductive adhesive. The IGBT module 11 is electrically connected to the PCB board 8, enabling feedback control of the resistance wire's heating power.

[0017] The base 1 has a rear cover 12 at its bottom, which is connected to the base 1 by a snap-fit ​​structure around its perimeter and is used to cover the lower part of the receiving cavity. The base 1 has connecting lugs on its edge, and the connecting lugs are provided with mounting holes.

[0018] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A water heater characterised by: The system includes a base (1), a cast resistance wire (2), and a top cover (3). The cast resistance wire (2) is disposed on the top surface of the base (1). The top cover (3) covers the cast resistance wire (2) and is welded to it. The inner wall of the top cover (3) has an outer circulating water channel (4) between it and the outer side of the cast resistance wire (2). The middle part of the cast resistance wire (2) has an inner circulating water channel (5), which communicates with the outer circulating water channel (4). The top cover (3) has... The inlet (6) is corresponding to the inner circulating water channel (5), and the outlet (7) is corresponding to the outer circulating water channel (4) on the upper cover (3). The bottom of the base (1) has a receiving cavity, and a PCB board (8) is provided in the receiving cavity. A high-voltage connector (9) and a low-voltage connector (10) are also provided on the top surface of the base (1). Multiple electronic components are integrated on the PCB board (8). The cast resistance wire (2), the high-voltage connector (9), and the low-voltage connector (10) are all electrically connected to the PCB board (8).

2. A water heater as claimed in claim 1 wherein: An IGBT module (11) is provided at the bottom of the cast resistance wire (2) through thermally conductive adhesive, and the IGBT module (11) is electrically connected to the PCB board (8).

3. A water heater as claimed in claim 1 wherein: The base (1) is provided with a rear cover (12) at the bottom. The rear cover (12) is connected to the base (1) by a four-sided snap-fit ​​structure and is used to cover the lower part of the receiving cavity.

4. A water heater as claimed in claim 1 wherein: The base (1) has connecting lugs on its edge, and the connecting lugs are provided with mounting holes.

5. A water heater as claimed in claim 1 wherein: The encapsulated resistance wire (2) has multiple protruding fins (13).

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