Inclined wedge type liquid heater

Abstract

The utility model discloses an inclined wedge type liquid heater. The check rings are installed at the two ends of the aluminum profile pipe, the water inlet pipe and the water outlet pipe are installed in cooperation with the two check rings respectively, a liquid flow channel penetrating through the water inlet pipe and the water outlet pipe is formed in the center of the aluminum profile pipe, and the aluminum profile pipe is further provided with longitudinal plate ribs. Insertion cavities used for being connected with the PTC heating core assemblies in an inserted mode are formed between the adjacent longitudinal plate ribs, each PTC heating core assembly comprises a PTC heating piece, a ceramic piece and an electrode piece bonded to the surface of the heating piece and the surface of the ceramic piece through bonding glue, and the PTC heating core assemblies are fixed in the insertion cavities in an inserted mode. The utility model has the advantages that redundant waste is reduced, the heat loss is reduced to the maximum extent, and the heat utilization rate of heating of the PTC sheet is greatly improved. The problem of potential safety hazards caused by aging of traditional upper silica gel and thermal runaway of PTC sheets is solved. And compared with a traditional split structure, the heat transfer efficiency is higher.

Description

Technical Field

[0001] The utility model relates to a heater for a new energy vehicle, in particular to an oblique-wedge type liquid heater. Background Art

[0002] With the rapid development of new energy vehicles, traditional automobile companies have joined the new energy vehicle industry, and competition has continued to increase. The quality requirements for the entire vehicle have also continued to increase. In addition, due to the increasing concentration of brands, the production capacity requirements for auto parts have also continued to increase. Since the optimal operating temperature of batteries in electric vehicles is 25-35℃, in order to cope with extreme weather conditions such as hot and cold, reduce the damage to batteries during the use of new energy vehicles, and increase the life of batteries, battery thermal management activities have been launched for this purpose.

[0003] In addition, with the imbalance of power generation and consumption in different regions and the different power demands in different seasons and time periods, energy storage heating has room for application. Although there are many battery water heating and energy storage products on the market, the same type of water heaters on the market usually have the following defects:

[0004] (1) Most of the aluminum profiles on the market now generate heat on one side. This structure makes the other side exposed to the air. Although the outside can be insulated by insulation cotton and other related materials, a large part of the heat is released into the air, causing great waste.

[0005] (2) Similar products on the market are basically wrapped with insulating film as the insulating material, but the insulating film is a poor conductor of heat and electricity. The heat released by the PTC sheet is transferred to the profile through the insulating film and then to the water. Since the insulating film has good thermal insulation performance, the part of the heat emitted by the PTC that is absorbed by the water is not too high.

[0006] (3) The application environment of the product is energy storage batteries and new energy vehicle batteries, which have extremely high requirements for product safety and aging. If a product failure occurs, the cost of repair and replacement is very high. Most of the structures wrapped with insulating films on the market are difficult to transfer heat to water, resulting in a high temperature inside the film. However, this state is more likely to cause aging of the silicone and thermal runaway of the PTC film. Summary of the invention

[0007] The technical problem to be solved by the utility model is to provide a loss-bevel liquid heater which can generate heat from a PTC sheet with high heat utilization rate, high heat transfer efficiency and can effectively avoid thermal runaway.

[0008] In order to solve the above technical problems, the utility model provides an oblique-wedge liquid heater, comprising an aluminum profile tube, retaining rings installed at both ends of the aluminum profile tube, and an inlet pipe and an outlet pipe respectively installed in cooperation with the two retaining rings. A liquid flow channel penetrating the inlet pipe and the outlet pipe is formed in the center of the aluminum profile tube. The aluminum profile tube also has longitudinal plate ribs located on the periphery of the liquid flow channel and arranged radially. A plug-in cavity for plugging in a PTC heating core assembly is formed between adjacent longitudinal plate ribs. The PTC heating core assembly comprises a PTC heating sheet, a ceramic sheet, and an electrode sheet bonded to the surface of the heating sheet and the ceramic sheet by an adhesive. The PTC heating core assembly is plugged and fixed in each plug-in cavity.

[0009] The PTC heating core assembly also includes a ceramic beveled piece arranged on the outer side of the electrode piece and bonded by adhesive.

[0010] The outer surface of each longitudinal plate rib forms a cylinder, and the insertion cavity is a slot between adjacent longitudinal ribs.

[0011] The length of the PTC heating core assembly is less than the length of the aluminum profile tube, and positioning strips which can be inserted into the respective slots to position the PTC heating core assembly are respectively arranged on the two retaining rings.

[0012] The cross-sectional shape of the longitudinal plate ribs is a trapezoidal structure with an arc-shaped outer surface so that each of the longitudinal ribs is arranged to form the cylindrical surface.

[0013] The aluminum profile tube is provided with fins which are evenly arranged in the liquid flow channel.

[0014] Heat dissipation strips are arranged in each of the longitudinal plate ribs.

[0015] A cylindrical shell which is sleeved on the periphery of the aluminum profile tube is arranged between the two retaining rings.

[0016] The advantages of the utility model are:

[0017] (1) The aluminum profile tube has longitudinal plate ribs located on the periphery of the liquid flow channel and arranged radially, and a plug-in cavity for plugging in the PTC heating core assembly is formed between adjacent longitudinal plate ribs. Therefore, it is equivalent to that both sides of the heater are close to the water channel. The heat generated by the PTC heating sheet can be transferred to the water channel through heat, thereby reducing excess waste and minimizing heat loss, which greatly improves the heat utilization rate of the PTC sheet.

[0018] (2) The PTC heating core assembly is plugged and fixed in each plug-in cavity, thereby forming an integrated structure of the PTC heating core assembly and the water channel. At the same time, a ceramic substrate is used instead of an insulating film for product insulation, which can solve the traditional safety hazards caused by the aging of silicone and the thermal runaway of the PTC sheet.

[0019] (3) The two sides of the PTC heating sheet are tightly attached to the electrodes. The electrodes and the ceramic bevels are tightly fitted together and the whole is embedded in the side gap (i.e. slot) of the aluminum profile. Aluminum itself is an excellent conductor of heat and electricity. At the same time, the insulation structure uses ceramics with better thermal conductivity for insulation, so that the heat generated by the PTC sheet can be quickly transferred to the heating core, which has a greater heat transfer efficiency than the traditional split structure.

[0020] (4) In particular, the structure of the PTC heating core component with ceramic substrates on both sides has greater advantages than the traditional structure of single-sided heat dissipation wrapped with an insulating film. The heat generated by the PTC will be quickly transferred to the aluminum profile through the electrode and the ceramic substrate, and then dissipated into the water, making the temperature of the PTC heating sheet at a lower level during operation, thereby ensuring that the silicone will not be corroded by high temperature and cause rapid aging. At the same time, the PTC sheet is in a low temperature state to avoid thermal runaway and cause current breakdown or arcing of the PTC, and the overall comprehensive performance of the product will be further improved.

[0021] (5) The outer surface of the aluminum profile adopts a circular surface design. A circular stainless steel shell can be installed on the outer periphery of the aluminum profile tube between the two retaining rings. At the same time, the shell is easier to assemble. The stainless steel tube shell and the profile are sealed by glue filling. Silicone is a very good insulating material, which reduces the possibility of arcing between the positive and negative electrodes, making the product safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the oblique-wedge type liquid heater of the utility model;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the aluminum profile tube in the utility model;

[0024] Figure 3 It is a side view structural schematic diagram of the aluminum profile tube in the utility model;

[0025] Figure 4 It is a schematic diagram of the exploded structure of the oblique-wedge type liquid heater of the utility model. DETAILED DESCRIPTION

[0026] The oblique wedge type liquid heater of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] As shown in the figure, the oblique-wedge liquid heater of the utility model comprises an aluminum profile tube 1, a retaining ring 2 installed at both ends of the aluminum profile tube, and an inlet pipe 3 and an outlet pipe 4 respectively installed in cooperation with the two retaining rings. A liquid flow channel 5 penetrating the inlet pipe and the outlet pipe is formed in the center of the aluminum profile tube 1. The aluminum profile tube 1 also has longitudinal plate ribs 6 located at the periphery of the liquid flow channel and arranged radially. Slots are arranged between adjacent longitudinal plate ribs 6. The slots are used as plug-in cavities 8 for plugging in PTC heating core components 7. The cross-sectional shape of the longitudinal plate ribs 6 is a trapezoidal structure with an arc-shaped outer surface. Since the longitudinal plate ribs 6 are arranged radially, the outer surface of each longitudinal plate rib 6 forms a cylinder. The PTC heating core component 7 comprises a PTC heating sheet 9, a ceramic sheet 10, an electrode sheet 11 bonded to the surface of the heating sheet and the ceramic sheet by adhesive, and a ceramic oblique-wedge sheet 12 bonded by adhesive and arranged on the outside of the electrode sheet. The PTC heating core component 7 is plugged and fixed in each plug-in cavity 8.

[0028] Furthermore, the length of the PTC heating core assembly 7 is smaller than the length of the aluminum profile tube 1 , and positioning strips 13 that can be inserted into respective slots to position the PTC heating core assembly 7 are respectively arranged on the two retaining rings 2 .

[0029] Furthermore, the aluminum profile tube 1 has fins 14 evenly arranged in the liquid flow channel 5. Since the cross-sectional shape of the longitudinal plate ribs 6 is a trapezoidal structure with an arc-shaped outer surface, each longitudinal plate rib 6 has an inner cavity with a trapezoidal cross-section and heat dissipation strips 15 are arranged in the inner cavity.

[0030] Furthermore, a cylindrical shell is arranged between the two retaining rings 2 and is sleeved on the outer periphery of the aluminum profile tube.

[0031] During assembly, the aluminum profile tube is first brazed before forming, and the retaining rings at both ends and the water inlet and outlet pipes are formed. Then the PTC heating sheet and the ceramic sheet are bonded to the electrode sheet on both sides by adhesive. The ceramic bevel sheet is bonded to the outside of the electrode sheet by adhesive, and then the whole is inserted into the aluminum profile tube, heated and cured, and finally formed as shown in the figure. Figure 1 The structure shown.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An inclined wedge type liquid heater, characterized in that: The invention comprises an aluminum profile tube (1), retaining rings (2) installed at both ends of the aluminum profile tube, and a water inlet pipe (3) and a water outlet pipe (4) respectively installed in cooperation with the two retaining rings. A liquid flow channel (5) penetrating the water inlet pipe and the water outlet pipe is formed at the center of the aluminum profile tube (1). The aluminum profile tube (1) also has longitudinal plate ribs (6) located at the periphery of the liquid flow channel and arranged radially. An insertion cavity (8) for inserting a PTC heating core assembly (7) is formed between adjacent longitudinal plate ribs (6). The PTC heating core assembly (7) comprises a PTC heating sheet (9), a ceramic sheet (10), and an electrode sheet (11) bonded to the surfaces of the heating sheet and the ceramic sheet by adhesive. The PTC heating core assembly (7) is inserted and fixed in each of the insertion cavities (8).

2. The oblique-wedge type liquid heater according to claim 1, characterized in that: The PTC heating core assembly (7) further comprises a ceramic beveled piece (12) arranged on the outside of the electrode piece and bonded by means of an adhesive.

3. The oblique-wedge type liquid heater according to claim 1 or 2, characterized in that: The outer surface of each of the longitudinal plate ribs (6) forms a cylindrical surface, and the insertion cavity (8) is a slot between adjacent longitudinal ribs.

4. The oblique-wedge type liquid heater according to claim 3, characterized in that: The length of the PTC heating core assembly (7) is less than the length of the aluminum profile tube (1), and positioning strips (13) capable of being inserted into the respective slots to position the PTC heating core assembly (7) are arranged on the two retaining rings (2).

5. The oblique-wedge type liquid heater according to claim 4, characterized in that: The cross-sectional shape of the longitudinal plate ribs (6) is a trapezoidal structure with an arc-shaped outer surface so that each of the longitudinal ribs is arranged to form the cylindrical surface.

6. The oblique-wedge type liquid heater according to claim 5, characterized in that: The aluminum profile tube (1) has fins (14) evenly arranged in the liquid flow channel (5).

7. The oblique-wedge type liquid heater according to claim 6, characterized in that: Heat dissipation strips (15) are arranged inside each of the longitudinal plate ribs (6).

8. The oblique-wedge type liquid heater according to claim 7, characterized in that: A cylindrical outer shell is arranged between the two retaining rings (2) and is sleeved on the outer periphery of the aluminum profile tube.

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