Water and electricity separated PTC heater

Abstract

The utility model discloses a water and electricity separated PTC heater, which comprises a PTC heating core body, a liquid box and a heating base, a cavity is arranged in the liquid box, one end of the liquid box is provided with an opening communicated with the cavity, at least one first partition plate is arranged in the cavity so as to divide the cavity into at least two mutually independent liquid cavities, and the heating base is arranged in the cavity. PTC (Positive Temperature Coefficient) shells with the same number as the liquid cavities are arranged on the heating base, the PTC heating core bodies are respectively arranged in the PTC shells, the PTC shells are respectively arranged in the liquid cavities, a first sealing ring is arranged on the heating base, the heating base is arranged in the opening and is sealed through the first sealing ring, a liquid inlet is formed in the bottom of one liquid cavity, and a liquid outlet is formed in the bottom of the other liquid cavity. A liquid outlet is formed in the bottom of the other liquid cavity, and a notch allowing liquid to flow through is formed in the first partition plate. Compared with the prior art, water and electricity separation is achieved.

Description

Technical Field

[0001] This utility model relates to a PTC heater, and more particularly to a PTC heater with water-electricity separation. Background Technology

[0002] In existing small-scale PTC heaters with water tanks, the main structure of the water tank and some components are typically fixed with screws. This results in a low overall protection level and fails to achieve water-electricity separation. Some sealing areas are even sealed with adhesive, which is unsightly, inconsistent, and ineffective, compromising product safety. Furthermore, the complex structure and cumbersome manufacturing process waste significant manpower and may fail to meet high customer performance requirements. The simple internal flow channels and slow fluid velocity also negatively impact power output. Utility Model Content

[0003] The purpose of this invention is to provide a PTC heater with water-electricity separation. The technical problem to be solved is to achieve water-electricity separation in the PTC heater and improve the heating effect.

[0004] To solve the above problems, the present invention adopts the following technical solution: a PTC heater with water-electricity separation, including a PTC heating core, a liquid tank, and a heating base. The liquid tank has a cavity, and one end of the liquid tank has an opening communicating with the cavity. The cavity has at least one first partition plate to divide the cavity into at least two independent liquid cavities. The heating base has PTC shells equal in number to the liquid cavities. The PTC heating cores are respectively disposed in the PTC shells, and the PTC shells are respectively disposed in the liquid cavities. The heating base has a first sealing ring, and the heating base is disposed in the opening and sealed by the first sealing ring. One liquid cavity has an inlet at the bottom, and the other liquid cavity has an outlet at the bottom. The first partition plate has a notch for liquid to flow through.

[0005] Furthermore, the heating base is provided with an annular pressure cap, and a second sealing ring is provided between the pressure cap and the heating base to achieve secondary sealing.

[0006] Furthermore, the outer periphery of the pressure cap is provided with an extension arm extending toward the liquid tank, the extension arm is provided with a buckle hole, the liquid tank is provided with a buckle opposite to the position of the extension arm, and the pressure cap is fixed by the buckle hole and the buckle.

[0007] Furthermore, the pressure cap is provided with an upper cover, and a protective device receiving cavity is provided between the upper cover and the pressure cap. The protective device receiving cavity is provided with a protective device connected to the PTC heating core, and the upper cover and the pressure cap are sealed together.

[0008] Furthermore, the upper edge of the cover is provided with a first stepped structure, and the lower edge of the cover is provided with a second stepped structure that matches the first stepped structure. The first stepped structure and the second stepped structure are welded and fixed together.

[0009] Furthermore, the notch is located at one end edge of the first partition plate where the liquid tank opening is located, and the notch is spaced apart along the edge of the first partition plate.

[0010] Furthermore, a second partition plate is provided on the two cavity walls opposite to the heating surface of the PTC heating core in the liquid cavity. The second partition plate divides the liquid cavity into sub-water cavities with the same number of gaps. The second partition plate is provided with a clearance groove so that the PTC shell is inserted into the clearance groove at the same time as the liquid cavity, thereby isolating the sub-water cavities together with the second partition plate.

[0011] Furthermore, a through hole is offset at the lower end of the second partition plate in the two liquid chambers, the through hole connecting the adjacent sub-water chambers. The inlet and outlet are respectively located on two distant sub-water chambers in the two liquid chambers, so that after the liquid enters the sub-water chamber from the inlet, it passes through each sub-water chamber under the action of the notch and the through hole, and finally flows out from the outlet.

[0012] Compared with the prior art, this utility model divides the cavity inside the outer shell into at least two water cavities by using a partition plate, and sets an equal number of PTC heating cores in the water cavities. A notch is set on the partition plate to allow the liquid to flow back and forth between the two water cavities, increasing the contact time between the liquid and the heating surface of the PTC heating core, thereby improving the liquid heating effect. The heating base and the outer shell are sealed and fixed by a first sealing ring, so that the water cavities are sealed, realizing the separation of water and electricity. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external structure of this utility model.

[0014] Figure 2 This is an exploded view of the present invention.

[0015] Figure 3 This is a cross-sectional view of the present invention.

[0016] Figure 4 This is a schematic diagram of the internal structure of the outer shell of this utility model. Figure 1 .

[0017] Figure 5 This is a schematic diagram of the internal structure of the outer shell of this utility model. Figure 2 .

[0018] Figure 6 This is a perspective view of the outer shell of this utility model.

[0019] Figure 7This is a partial enlarged view of the present invention.

[0020] Figure 8 This is a schematic diagram of the structure of the pressure cap of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 3 As shown, this utility model discloses a PTC heater with water-electricity separation, including a PTC heating core 1, a liquid tank 2, a heating base 3, and a pressure cap 12, wherein:

[0023] The liquid tank 2 has a cavity, and one end of the liquid tank 2 has an opening 4 that communicates with the cavity. A first partition plate 5 is provided in the cavity to divide the cavity into two independent liquid cavities 6. One liquid cavity 6 has an inlet 9 at the bottom and the other liquid cavity 6 has an outlet 10 at the bottom. The first partition plate 5 has a notch 11 at the end of the opening 4 for liquid to flow through. The inlet 9 and the outlet 10 are set far apart to allow the liquid to flow fully in the liquid cavity 6, so that the liquid can have more sufficient contact with the heat-conducting surface of the PTC shell corresponding to the heating surface of the PTC heating core 1.

[0024] The heating base 3 is provided with PTC shells 7 in the same number as the liquid chambers 6. The overall shape of the PTC shells 7 is the same as that of the liquid chambers 6, but the size is different, so that there is a gap between the two to allow the liquid to flow in the liquid chambers 6. The end of the PTC shells 6 opposite to the heating base 3 is open. The PTC shells 6 and the heating base 3 are sealed and welded together. The open end of the PTC shells 6 is connected to the opening on the heating base 3, so that the PTC heating cores 1 can be assembled. The PTC heating cores 1 are respectively placed in the PTC shells 7, and the PTC shells 7 are respectively placed in the liquid chambers 6. The exterior of the heating base 3 has a stepped structure. The stepped structure of the heating base 3 is fitted with a first sealing ring 8. When the PTC shells 7 are inserted into the liquid chambers 6, the heating base 3 is placed in the open end 4, and the first sealing ring 8 seals the open end 4 and the heating base 3. The heating base 3 abuts against the first partition plate 5, so that the two liquid chambers 6 are independent of each other, and the liquid can only flow into the other liquid chamber 6 through the notch 11.

[0025] The pressure cap 12 is annular, and its outer shape is slightly larger than the opening 4 of the liquid chamber 2, so that it can be pressed on the opening 4. The inner hole in the annular pressure cap 12 can avoid the protective device on the PTC heating core 1. The upper edge of the heating base 3 is provided with a raised step around the perimeter, and a second sealing ring 13 is fitted on the step. The heating base 3 and the pressure cap 12 are sealed by the second sealing ring 13 to achieve secondary sealing. The pressure cap 12 and the liquid tank 2 can be connected and fixed by welding or other means.

[0026] The above structure achieves sufficient isolation between the PTC heating core 1 and the liquid tank 2, preventing liquid from entering the PTC shell or protective devices and thus causing overall electrification, thereby improving the product's waterproof rating.

[0027] Of course, the pressure cap 12 and the liquid tank 2 can also adopt a detachable structure, which can facilitate later maintenance and reduce maintenance costs. Specifically, the outer periphery of the pressure cap 12 is distributed with extension arms 14 extending towards the liquid tank 2. There are six extension arms 14 in total. The extension arms 14 are provided with buckle holes. The liquid tank 2 is provided with buckles 15 that are opposite to the position of the extension arms 14. The upper cover 12 is fixed by buckle holes and buckles 15. The pressure cap 12 can press the heating base 3 onto the liquid tank 2.

[0028] The PTC heating core is clamped and locked in place with the corresponding position in the liquid tank using a snap-fit ​​mechanism, which compresses and deforms the sealing ring to achieve a seal. This snap-fit ​​locking method eliminates the hassle of screwing in screws and simplifies disassembly and assembly during production.

[0029] like Figures 1 to 3 As shown, the pressure cap 12 is provided with an upper cover 16, and a protective device receiving cavity 17 is provided between the upper cover 16 and the pressure cap 12. The protective device receiving cavity 17 is provided with a protective device 18 connected to the PTC heating core 1. The upper cover 16 and the pressure cap 12 are fixed by ultrasonic welding, so that the protective device receiving cavity 17 forms a sealed space, and the product forms a sealed whole, which can achieve the IP67 protection level, thereby protecting the PTC heating core and the protective device inside.

[0030] The upper edge of the pressure cap 12 has a first stepped structure 19, and the lower edge of the upper cover 16 has a second stepped structure 20 that matches the first stepped structure 19. The first stepped structure 19 and the second stepped structure 20 are welded together to improve the strength of the weld; specifically, as shown... Figure 7 As shown, a triangular groove 25 for accommodating welding adhesive is provided on the second stepped structure 20 to prevent insufficient adhesive application.

[0031] By utilizing ultrasonic welding technology and the application of sealing rings and buckles, the glue application process is eliminated while ensuring product sealing. This results in good product consistency and a more aesthetically pleasing and neat overall outer tube. At the same time, the production process optimizes material and labor costs.

[0032] like Figures 4 to 6 As shown, in order to ensure that the liquid can fully contact the heat-conducting surface of the PTC shell corresponding to the PTC heating core 1 in the liquid cavity 6 and improve the heating effect, a second partition plate 21 is provided on the two side walls of the liquid cavity 6 opposite to the heating surface of the PTC heating core 1. There are two second partition plates 21 in each liquid cavity 6, which divide the liquid cavity 6 into three sub-water cavities 22. Three notches 11 are provided on the first partition plate 5, and the three notches 11 are respectively provided in correspondence with the three sub-water cavities 22. An avoidance groove 23 is provided on the second partition plate 21 so that the PTC shell 7 is inserted into the avoidance groove 23 at the same time as it is inserted into the liquid cavity 6, so that it and the second partition plate 21 can isolate the sub-water cavities 22 from each other.

[0033] In order to guide the liquid to flow in an S-shape in the two liquid chambers 6, a through hole 24 is provided at the lower end of the second partition plate 21 in the two liquid chambers 6. The through hole 24 connects the adjacent sub-water chambers 22. The inlet 9 and the outlet 10 are respectively provided on two far apart sub-water chambers 22 in the two liquid chambers 6, so that after the liquid enters the sub-water chamber 22 from the inlet 9, it passes through each sub-water chamber 22 under the action of the notch 11 and the through hole 24, and finally flows out from the outlet 10.

[0034] For ease of understanding, the six sub-cavities 22 are defined here as sub-cavity A, sub-cavity B, sub-cavity C, sub-cavity D, sub-cavity E, and sub-cavity F, respectively. Figure 6 As can be seen in the dotted lines, the specific distribution of the second partition plates 21 is shown. The inlet 9 is located at the bottom of sub-water chamber A. The second partition plate 21 between sub-water chamber A and sub-water chamber B does not have a through hole 24. Therefore, after liquid enters sub-water chamber A, it will enter sub-water chamber D through the gap 11. The second partition plate 21 between sub-water chamber D and sub-water chamber E has a through hole 24, so water directly enters sub-water chamber E. However, the second partition plate 21 between sub-water chamber E and sub-water chamber F does not have a through hole 24, so the liquid... The liquid is forced to enter sub-water cavity B through the gap 11 in sub-water cavity E. The second partition plate 21 between sub-water cavity B and sub-water cavity C is provided with a through hole 24, so the liquid enters sub-water cavity C, and then enters sub-water cavity F through the gap 11, and finally flows out from the liquid outlet 10 at the bottom of sub-water cavity F. This arrangement is conducive to increasing the flow rate and increasing the contact area between the liquid in the flow channel and the heat-conducting surface of the PTC shell corresponding to the heating surface of the PTC heating core, thereby improving the heating effect without increasing the PTC heating power.

Claims

1. A PTC heater for water-electricity separation, comprising a PTC heating core (1), characterized in that: It also includes a liquid tank (2) and a heating base (3). The liquid tank (2) has a cavity. One end of the liquid tank (2) has an opening (4) that communicates with the cavity. The cavity has at least one first partition plate (5) to divide the cavity into at least two independent liquid cavities (6). The heating base (3) has PTC shells (7) in the same number as the liquid cavities (6). PTC heating cores (1) are respectively disposed in the PTC shells (7). The PTC shells (7) are respectively disposed in the liquid cavities (6). The heating base (3) has a first sealing ring (8). The heating base (3) is disposed in the opening (4) and sealed by the first sealing ring (8). One of the liquid cavities (6) has an inlet (9) at the bottom and the other liquid cavity (6) has an outlet (10) at the bottom. The first partition plate (5) has a notch (11) for liquid to flow through.

2. The PTC heater for water-electricity separation according to claim 1, characterized in that: The heating base (3) is provided with an annular pressure cap (12), and a second sealing ring (13) is provided between the pressure cap (12) and the heating base (3) to achieve secondary sealing.

3. The PTC heater for water-electricity separation according to claim 2, characterized in that: The outer periphery of the pressure cap (12) is provided with an extension arm (14) extending toward the liquid tank (2). The extension arm (14) is provided with a buckle hole, and the liquid tank (2) is provided with a buckle (15) opposite to the position of the extension arm (14). The pressure cap (12) is fixed by the buckle hole and the buckle (15).

4. The PTC heater with water-electricity separation according to claim 3, characterized in that: The pressure cap (12) is provided with an upper cover (16), and a protective device receiving cavity (17) is provided between the upper cover (16) and the pressure cap (12). The protective device receiving cavity (17) is provided with a protective device (18) connected to the PTC heating core (1), and the upper cover (16) and the pressure cap (12) are sealed together.

5. The PTC heater with water-electricity separation according to claim 4, characterized in that: The upper edge of the pressure cap (12) is provided with a first stepped structure (19), and the lower edge of the upper cover (16) is provided with a second stepped structure (20) that is adapted to the first stepped structure (19). The first stepped structure (19) and the second stepped structure (20) are welded and fixed.

6. The PTC heater with water-electricity separation according to any one of claims 1-5, characterized in that: The notch (11) is located at one end edge of the opening of the liquid tank (2) on the first partition plate (5), and the notch (11) is spaced along the edge of the first partition plate (5).

7. The PTC heater with water-electricity separation according to claim 6, characterized in that: The liquid cavity (6) is provided with a second partition plate (21) on the two sides of the cavity wall opposite to the heating surface of the PTC heating core (1). The second partition plate (21) divides the liquid cavity (6) into sub-water cavities (22) with the same number of notches (11). The second partition plate (21) is provided with a clearance groove (23) so that the PTC shell (7) is inserted into the liquid cavity (6) and simultaneously inserted into the clearance groove (23), thereby isolating the sub-water cavities (22) together with the second partition plate (21).

8. The PTC heater with water-electricity separation according to claim 7, characterized in that: A through hole (24) is provided at the lower end of the second partition plate (21) in the two liquid chambers (6) at an offset position. The through hole (24) connects the adjacent sub-water chambers (22). The inlet (9) and outlet (10) are respectively located on two sub-water chambers (22) that are far apart in the two liquid chambers (6), so that after the liquid enters the sub-water chamber (22) from the inlet (9), it passes through each sub-water chamber (22) under the action of the notch (11) and the through hole (24) and finally flows out from the outlet (10).

Images