Novel liquid PTC heater

Abstract

The utility model provides a novel liquid PTC heater which comprises a tubular PTC heating core, the tubular PTC heating core is installed on a shell with two open ends in a penetrating mode, a gland is arranged on the tail portion of the tubular PTC heating core, the gland is fixedly connected with the shell in a sealed mode, a baffle is arranged on the head portion of the tubular PTC heating core, an upper cover is arranged on the baffle, and the upper cover is fixedly connected with the shell in a sealed mode. An inlet and an outlet are oppositely formed in the outer side face of the shell, the shell is provided with liquid heating chambers which are the same as the PTC heating cores in number and are independent of each other, a liquid through opening is formed between the two liquid heating chambers, and the liquid through openings are formed in the ends, away from the inlet and the outlet, of the shell so that liquid can be fully heated. Compared with the prior art, the utility model has the beneficial effects that an independent PTC (Positive Temperature Coefficient) heating core is matched with a liquid cavity, and the liquid baffles are arranged on the upper and lower inner walls of the liquid heating cavity in a crossed manner, so that liquid is heated in an S-shaped circulating manner, and the heating speed and the outlet temperature of a product are improved.

Description

Technical Field

[0001] This utility model relates to the field of physics, and in particular to heating devices, specifically a novel liquid PTC heater. Background Technology

[0002] PTC heaters are widely used in various projects that require heating due to their constant temperature self-regulation and resistance to dry burning.

[0003] Chinese utility model patent application CN223512272U discloses a PTC heater with water-electricity separation. The technical solution of this patent application involves inserting a PTC heating element into a drawer-shaped aluminum casting shell and immersing it in liquid (see appendix for details). Figure 2 Appendix Figure 3 This is used to heat the liquid.

[0004] However, the products related to the aforementioned publicly disclosed patent applications exhibited problems such as rapid power attenuation and leakage with electrical charge during actual use. Analysis revealed that the power attenuation was due to insufficient contact between the PTC heating element and the inner wall of the drawer-shaped outer casing. After frequent power-on and power-off cycles, the different coefficients of thermal expansion between the PTC heating element and the inner casing caused microscopic gaps to appear, leading to increased thermal resistance and power reduction. Furthermore, the product also experienced slow heating speed and low outlet temperature during use. This was primarily because multiple PTC heating elements were placed within a single liquid heating chamber, preventing each element from fully utilizing its power.

[0005] Therefore, there is an urgent need for a high-efficiency liquid PTC heater to solve the above problems. Utility Model Content

[0006] To address the aforementioned problems, this invention provides a novel liquid PTC heater to improve heating speed and temperature. The technical solution provided by this invention is as follows:

[0007] A novel liquid PTC heater includes a tubular PTC heating core, which is inserted and mounted on a shell open at both ends. A pressure cap is provided at the tail end of the PTC heating core, and the pressure cap is sealed and fixedly connected to the shell. A baffle is provided at the head of the PTC heating core, and an upper cover is provided on the upper side of the baffle, which is sealed and fixedly connected to the shell. An inlet and an outlet are provided opposite to each other on the outer side of the shell. The shell has the same number of independent liquid heating chambers as the PTC heating core, so that the liquid is fully heated. A liquid outlet is provided between the two liquid heating chambers, and the liquid outlet is located at the far end of the inlet and outlet of the shell.

[0008] Furthermore, the upper and lower inner walls of the liquid heating chamber are equipped with baffles, and the baffles at both ends are arranged in a cross pattern, so that the liquid circulates and heats in an "S" shape, which prolongs the liquid heating time and causes the liquid temperature to rise rapidly.

[0009] Furthermore, in order to ensure that the PTC heating element fits tightly with the tube body, reduce the increase in thermal resistance caused by thermal expansion and contraction, and improve the thermal efficiency and life of the product, the PTC heating core uses an aluminum profile tube body as the outer tube. After the PTC heating element is inserted into the outer tube, the tube is pressed to cause permanent plastic deformation on the side of the outer tube.

[0010] Furthermore, for safety, a grounding buckle is installed at the outer tube outlet to fix the grounding wire harness to the grounding buckle, ensuring reliable grounding of the product.

[0011] Furthermore, in order to control the liquid temperature, a temperature control component is installed on the baffle.

[0012] Furthermore, the outer periphery of both the pressure cap and the top cover is provided with a snap-fit ​​structure that matches the outer shell, making installation convenient and improving assembly efficiency.

[0013] Furthermore, for lightweight design, the outer tube thickness used in the above-mentioned PTC heating core is preferably 0.8-1.2mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are: using a single PTC heating core with a liquid chamber, and setting baffles on the upper and lower inner walls of the liquid heating chamber, with the baffles arranged in a cross pattern, so that the liquid circulates and heats in an "S" shape, thereby improving the product heating speed and outlet temperature. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a new type of liquid PTC heater.

[0017] Figure 2 This is a schematic diagram of an explosion of a novel liquid PTC heater.

[0018] Figure 3 This is a schematic diagram of the outer tube of a novel liquid PTC heater.

[0019] Figure 4 This is a schematic diagram of the housing of a novel liquid PTC heater.

[0020] Figure 5 This is a schematic diagram of the cross-section of a novel liquid PTC heater.

[0021] 1—PTC heating element; 11—outer tube; 111—side; 112—grounding clip;

[0022] 2—Outer shell; 21—Inlet; 22—Outlet; 23—Liquid heating chamber; 24—Baffle plate; 25—Port;

[0023] 3—Capping;

[0024] 4—Baffle;

[0025] 5—Top cover; Detailed Implementation

[0026] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0027] It should be understood that the terms "inner", "outer", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] The design will be further explained below with reference to the accompanying drawings in the structural specification.

[0029] like Figure 2 A novel liquid PTC heater includes a tubular PTC heating core 1, which is inserted into a shell 2 with openings at both ends. A pressure cap 3 is provided at the tail end, and the pressure cap 3 is sealed and fixedly connected to the shell 2. A baffle 4 is provided at the head end, and an upper cover 5 is provided on the upper side of the baffle 4. The upper cover 5 is sealed and fixedly connected to the shell 2. An inlet 21 and an outlet 22 are provided diagonally on the outer side of the shell 2.

[0030] like Figure 4(a) Figure is a perspective view of the outer casing 2. The outer casing 2 has the same number of independent liquid heating chambers 23 as the PTC heating core 1. In this embodiment, two separate liquid heating chambers 23 are provided as an example. The upper and lower inner walls of the liquid heating chambers 23 are provided with baffles 24. (b) Figure is a schematic diagram of the liquid flow in the outer casing 2. Taking the outlet layer of the liquid heating chamber 23 as an example, as shown in Figure (b), the baffles 24 at both ends are arranged crosswise, so that the liquid circulates and heats in an "S" shape, which prolongs the liquid heating time and makes the liquid temperature rise rapidly. A liquid outlet 25 is provided between the two liquid heating chambers 23. The liquid outlet 25 is located at the far end of the inlet 21 and outlet 22 of the outer casing 2, so that the liquid is fully heated.

[0031] like Figure 3 The PTC heating core 1 uses an aluminum profile tube as the outer tube 11. After the PTC heating element is inserted into the outer tube 11, the tube is pressed to cause permanent plastic deformation on the side 111 of the outer tube 11, ensuring that the PTC heating element is tightly attached to the tube body, reducing the increase in thermal resistance caused by thermal expansion and contraction, and improving the thermal efficiency and life of the product.

[0032] For safety, a grounding buckle 112 is installed at the outlet of the outer tube 11 to fix the grounding wire harness to the grounding buckle 112 and ensure reliable grounding of the product.

[0033] like Figure 5 The PTC heating core 1 is designed so that both ends pass through the liquid heating chamber 23, and the tail end of the PTC heating core 1 is no longer directly immersed in the liquid. The purpose of this structural design is to effectively prevent liquid from directly seeping into the core body when the tail seal of the PTC heating core 1 fails, thereby fundamentally eliminating the safety hazard of liquid becoming electrified due to contact with live parts.

[0034] like Figure 2 In order to control the liquid temperature, a temperature control component is installed on the baffle 4.

[0035] Furthermore, for lightweight design, the thickness of the outer tube 11 used in the PTC heating core 1 is preferably 0.8-1.2mm.

[0036] like Figure 2 The outer periphery of the pressure cap 3 and the upper cover 5 are provided with a buckle structure that matches the outer shell 2, which makes installation convenient and improves assembly efficiency.

[0037] The embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles of the embodiments, their practical application, or improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A novel liquid PTC heater characterized by: The utility model relates to a kind of liquid heating device, including a tubular PTC heating core (1), the tubular PTC heating core (1) is installed in a two-end open shell (2), the PTC heating core (1) tail is provided with a gland (3), gland (3) is sealingly fixed between shell (2) and is connected, the PTC heating core (1) head is provided with a baffle (4), the upper edge of the baffle (4) is provided with a cover (5), cover (5) is sealingly fixed between shell (2) and is connected, shell (2) outside face is relatively provided with import (21), outlet (22), shell (2) is equipped with the same number of liquid heating chamber (23) with PTC heating core (1), and mutually independent, two liquid heating chambers (23) are equipped with liquid throughport (25), liquid throughport (25) is arranged at the import (21) of shell (2), the far end position of outlet (22), so that liquid is heated sufficiently.

2. A new type of liquid PTC heater according to claim 1, characterized in that: The upper and lower inner walls of liquid heating chamber (23) are provided with liquid baffle (24), and the liquid baffles (24) at head and tail are cross arranged, so that liquid is heated in "S" shape circulation.

3. A novel liquid PTC heater according to claim 2, characterized in that: The outer side of the PTC heating core (1) is provided with an outer tube (11), and the side (111) of the outer tube (11) is permanently deformed after being stressed.

4. A novel liquid PTC heater according to claim 3, characterized in that: The outlet end of the outer tube (11) is provided with a grounding buckle (112), and the grounding wire harness is fixed on the grounding buckle (112), so as to ensure the reliable grounding of the product.

5. A novel liquid PTC heater according to claim 4, characterized in that: The baffle (4) is provided with a temperature control assembly.

6. A novel liquid PTC heater according to claim 5, characterized in that: The outer periphery of the gland (3) and the cover (5) is provided with a buckle structure matched with the shell (2).

7. A novel liquid PTC heater according to claim 6, characterized in that: The outer tube (11) is made of aluminum profile with high thermal conductivity, and the wall thickness is 0.8-1.2mm.

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