PTC (Positive Temperature Coefficient) pipeline heater

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient), and provides a PTC pipeline heater, which comprises a heating bag assembly and a shell with an inner cavity, a slot is arranged in the shell, the heating bag assembly is inserted into the slot, a flow channel for liquid to flow through is arranged in the shell, the slot is positioned in the flow channel, and the inner cavity is communicated with the inner cavity. The shell is provided with an opening allowing an external wire harness to enter the shell, and the heating bag assembly supplies power through the external wire harness. According to the PTC pipeline heater, the heating bag assembly is inserted into the inserting groove, the heating bag assembly transmits heat to the inserting groove and then transmits the heat to cooling liquid flowing through the flow channel after being powered on, the heat exchange efficiency is high, and under the condition that the cooling liquid absorbs the same heat due to high heat exchange efficiency, the needed heat source heat dissipation amount is smaller, and the heat exchange efficiency is higher. Therefore, the overall size of the PTC pipeline heater is relatively smaller, and the size of the PTC pipeline heater can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of PTC, and particularly relates to a PTC pipeline heater. Background Art

[0002] In recent years, with the rapid development of industrial energy storage technologies promoted by the country's new energy technologies, the demand for industrial PTC pipeline heaters for energy storage has also increased rapidly. Currently, the PTC pipeline heaters applied to energy storage units on the market are large in volume and low in heating efficiency, and a large amount of heat is inevitably wasted during operation. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a PTC pipeline heater, which can at least solve some defects in the prior art.

[0004] To achieve the above purpose, the embodiment of the utility model provides the following technical solution: A PTC pipeline heater includes a heating pack assembly, and further includes a housing with an inner cavity. A slot is provided in the housing, and the heating pack assembly is inserted into the slot. A flow channel for liquid to flow through is also provided in the housing, and the slot is located in the flow channel. An opening for an external wire harness to enter the housing is formed on the housing, and the heating pack assembly is powered by the external wire harness.

[0005] Further, both the heating pack assembly and the slot are provided with a plurality of them, and there is a gap between adjacent slots, and the gap is located in the flow channel.

[0006] Further, it also includes a busbar, the pins of the heating pack assembly are connected to the busbar, and the busbar is electrically connected to the external wire harness.

[0007] Further, the slot is arranged perpendicular to the direction of liquid flow.

[0008] Further, it also includes a rubber plug, the rubber plug seals the opening, and the rubber plug has a wire outlet for the external wire harness to pass through.

[0009] Further, a backing plate is provided at the opening, and the backing plate has a wire hole for the external wire harness to pass through.

[0010] Further, it also includes a heating box arranged in the inner cavity, and the slot is formed in the heating box.

[0011] Further, the heating box is welded to the housing.

[0012] Further, the housing includes a bottom shell and a sealing shell installed on the bottom shell, and the bottom shell and the sealing shell enclose to form the inner cavity.

[0013] Further, inlets and outlets for liquid to enter and exit the inner cavity are respectively provided at both ends of the housing.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: By inserting the heating pack assembly into the slot, after being powered on, the heating pack assembly transfers heat to the slot and then to the coolant flowing through the flow channel. The heat exchange efficiency is high. When the heat exchange efficiency is high, for the coolant to absorb the same amount of heat, the heat dissipation of the heat source required is smaller, and thus the overall volume will be relatively smaller, which can reduce the volume of the PTC pipe heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a disassembly schematic diagram of a PTC pipe heater provided by an embodiment of the present utility model;

[0016] Figure 2 It is a schematic diagram of a PTC pipe heater provided by an embodiment of the present utility model;

[0017] Figure 3 It is a radial cross-sectional schematic diagram of a PTC pipe heater provided by an embodiment of the present utility model;

[0018] Figure 4 It is an axial cross-sectional schematic diagram of a PTC pipe heater provided by an embodiment of the present utility model;

[0019] Figure 5 It is a schematic diagram of a PTC pipe heater provided by an embodiment of the present utility model with the sealing shell removed;

[0020] Figure 6 It is a schematic diagram of the heating box of a PTC pipe heater provided by an embodiment of the present utility model;

[0021] Figure 7 It is a schematic diagram of the bottom shell of a PTC pipe heater provided by an embodiment of the present utility model;

[0022] In the reference numerals: 1 - heating pack assembly; 10 - pin; 2 - external wire harness; 3 - bus bar; 4 - rubber plug; 5 - backing plate; 6 - heating box; 60 - slot; 61 - interval; 7 - housing; 70 - bottom shell; 71 - sealing shell; 72 - inlet; 73 - outlet; 74 - opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1 to 7 , an embodiment of the present utility model provides a PTC pipeline heater, which includes a heating pack assembly 1 and a housing 7 with an inner cavity. A slot 60 is provided in the housing 7, and the heating pack assembly 1 is inserted into the slot 60. The housing 7 also has a flow channel for liquid to flow through, and the slot 60 is located in the flow channel. An opening 74 for an external wire harness 2 to enter the housing 7 is formed on the housing 7, and the heating pack assembly 1 is powered by the external wire harness 2. In this embodiment, the heating pack assembly 1 is inserted into the slot 60. After being powered on, the heating pack assembly 1 transfers heat to the slot 60 and then to the coolant flowing through the flow channel. The heat transfer efficiency is high. When the heat transfer efficiency is high, in the case that the coolant absorbs the same amount of heat, the heat dissipation required by the heat source is smaller, and the overall volume will be relatively smaller, which can reduce the volume of the PTC pipeline heater. Specifically, the heating pack assembly 1 is an existing component, which can generate heat when powered on, thereby heating the liquid (which can be coolant) in the inner cavity and realizing the heat transfer of the coolant.

[0025] Please refer to Figures 1 to 7 , both the heating pack assembly 1 and the slot 60 have a plurality of them, and there is a gap 61 between adjacent slots 60, and the gap 61 is located in the flow channel. In this embodiment, several heating pack assemblies 1 and slots 60 can be designed, so as to improve the heating efficiency.

[0026] Please refer to Figures 1 to 7 , the heater further includes a bus bar 3, the pins 10 of the heating pack assembly 1 are connected to the bus bar 3, and the bus bar 3 is electrically connected to the external wire harness 2. In this embodiment, the heating pack assembly 1 can be electrically connected to the bus bar 3 through the pins 10 first, and then the bus bar 3 is electrically connected to the external wire harness 2. When there are multiple heating pack assemblies 1, a great deal of wire harness can be saved. When there is only one heating pack assembly 1, the bus bar 3 can be removed, and the heating pack assembly 1 can be directly electrically connected to the external wire harness 2.

[0027] Please refer to Figures 1 to 7 , the slot 60 is arranged perpendicular to the direction of liquid flow. In this embodiment, the direction of the slot 60 can define the insertion direction of the heating pack assembly 1. Designing the slot 60 perpendicular to the direction of liquid flow can increase the heat dissipation surface area through which the coolant flows, make the heat transfer area relatively larger, and the heat transfer efficiency higher.

[0028] Please refer to Figures 1 to 7 , the heater further includes a rubber plug 4, the rubber plug 4 seals the opening 74, and the rubber plug 4 has a wire outlet for the external wire harness 2 to pass through. In this embodiment, the rubber plug 4 is used, and the flexible binding ability of the rubber plug 4 plays a certain sealing effect to prevent liquid from overflowing from the opening 74.

[0029] See also Figures 1 to 7 The opening 74 is provided with a backing plate 5 having a wire hole for the external wiring harness 2 to pass through. In this embodiment, the backing plate 5 is provided at the opening 74, which, on the one hand, prevents liquid from overflowing, and on the other hand, can restrain the external wiring harness 2 through its wire hole.

[0030] See also Figures 1 to 7 , also includes a heating box 6 arranged in the inner cavity, and the slot 60 is formed in the heating box 6. In this embodiment, a heating box 6 can be additionally designed in the inner cavity to form the slot 60, which makes it easier to obtain a plurality of slots 60 and facilitates assembly. The size of the heating box 6 is smaller than the bottom shell 70, so that it can be completely placed in the bottom shell 70. The heating box 6 can be integrally formed with a plurality of slots 60, and each slot 60 can be evenly distributed. The intervals 61 between adjacent slots 60 can be used for liquid to flow through, thereby wrapping the slot 60 and improving the heat exchange efficiency of the heating pack assembly 1 for the liquid. Preferably, the heating box 6 is welded to the shell 7, specifically to the bottom shell 70, and the airtightness of the flow channel is ensured by friction welding to avoid leakage.

[0031] See also Figures 1 to 7 , the shell 7 includes a bottom shell 70 and a sealing shell 71 installed on the bottom shell 70, and the bottom shell 70 and the sealing shell 71 enclose the inner cavity. In this embodiment, the shell 7 can be refined into a bottom shell 70 and a sealing shell 71, and the two can be fixedly connected by screws. The sealing shell 71 arches upward to form a certain space for the manifold 3 to be set. The shell 7 is generally a long cylindrical structure. An inlet 72 and an outlet 73 for liquid to enter and exit the inner cavity are respectively provided at its two ends. The positions of the inlet 72 and the outlet 73 are interchangeable. After the liquid enters the inner cavity from the inlet 72, it will flow in the inner cavity, thereby exchanging heat with the slot 60 in the flow channel, and then the liquid is discharged from the outlet 73.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PTC pipe heater, comprising a heating element assembly, characterized in that: It further includes a housing with an inner cavity, a slot is provided in the housing, the heating pack assembly is inserted into the slot, a flow channel for liquid to flow through is further provided in the housing, the slot is located in the flow channel, and an opening for an external wire harness to enter the housing is formed on the housing, and the heating pack assembly is powered by the external wire harness.

2. The PTC pipe heater according to claim 1, characterized in that: Both the heating pack assembly and the slot have a plurality of them, and there is a gap between adjacent slots, and the gap is located in the flow channel.

3. The PTC pipe heater according to claim 1, characterized in that: It further includes a bus bar, the pins of the heating pack assembly are connected to the bus bar, and the bus bar is electrically connected to the external wire harness.

4. The PTC pipeline heater according to claim 1, wherein: The slot is arranged perpendicular to the direction of liquid flow.

5. The PTC pipe heater according to claim 1, characterized in that: It further includes a rubber plug, the rubber plug seals the opening, and the rubber plug has a grommet for the external wire harness to pass through.

6. The PTC pipe heater according to claim 1, characterized in that: A backing plate is provided at the opening, and the backing plate has a wire hole for the external wire harness to pass through.

7. A PTC pipe heater according to claim 1, characterized in that: It further includes a heating box arranged in the inner cavity, and the slot is formed in the heating box.

8. The PTC pipeline heater according to claim 7, wherein: The heating box is welded to the housing.

9. A PTC pipe heater according to claim 1, characterized in that: The housing includes a bottom shell and a sealing shell installed on the bottom shell, and the bottom shell and the sealing shell enclose to form the inner cavity.

10. A PTC pipe heater according to claim 1, characterized in that: An inlet and an outlet for liquid to enter and exit the inner cavity are respectively provided at both ends of the housing.

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