Shell and tube heat exchanger with electric heating

Abstract

The utility model proposes a shell and tube heat exchanger with electric heating, comprising a square cylinder, end plates are provided at both ends of the square cylinder, the ends and the ends of the cylinder respectively form water chambers, a heat exchange tube is provided in the square cylinder, the heat exchange tube passes through a baffle, the heat exchange tube passes through the ends to connect the two water chambers, a heating component is provided on the outside of the square cylinder, the heating component heats the metal square cylinder, and reheats the liquid flowing through the square cylinder, and a heating device is provided on the inside or outside of the heat exchanger to heat the fluid in the barrel to improve the heat exchange efficiency, and keep the structure compact, suitable for use in new energy vehicles, and reduce the pressure drop of the water channel.

Description

Technical Field

[0001] The utility model relates to the field of heat exchangers, in particular to a shell and tube heat exchanger with electric heating. Background Art

[0002] Existing energy storage units and battery thermal management units are required to provide cooling and heating capacity. The cooling capacity is used to offset the heat generated when the energy storage battery is charged and discharged; the heating capacity is used to preheat the battery in winter. Since the total amount of preheating is limited, electric heating is often used. In actual use, electric heaters and coolers are often connected in series, which has the disadvantages of large pipeline pressure drop and complex pipeline design. In order to reduce the pipeline pressure drop, electric heaters and coolers can be connected in parallel. The main disadvantage is that the pipeline is complex and valves need to be set to switch the flow direction of the fluid.

[0003] In energy storage equipment, the structure provided for energy storage units is very limited; in new energy vehicles, the structure provided for battery thermal management units is even more limited, and it is necessary to find a design that makes the unit more compact and reduces the pressure drop in the water channel. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes a shell and tube heat exchanger with electric heating, including a square cylinder, end plates are provided at both ends of the square cylinder, the end plates and the ends of the cylinder respectively form water chambers, a heat exchange tube is provided in the square cylinder, the heat exchange tube passes through a baffle, the heat exchange tube passes through the end plate to connect the two water chambers, and a heating component is provided on the outside of the square cylinder, the heating component heats the metal square cylinder, and reheats the liquid flowing through the square cylinder.

[0005] Preferably, the heating component is a PTC heater, and the PTC heater is square and attached to the outer wall of the square cylinder.

[0006] Preferably, the heating component is a heating coil, and the heating coil is arranged outside the square cylinder.

[0007] Preferably, the heating power of the heating component is 1 / 5 to 3 / 5 of the rated cooling capacity of the heat exchanger.

[0008] A shell and tube heat exchanger with electric heating comprises a square cylinder, end plates are provided at both ends of the square cylinder, heat exchange tubes are provided inside the square cylinder, and the characteristic is that a heating component is provided inside the square cylinder, and the heating component heats the liquid flowing through the square cylinder.

[0009] Preferably, the heating component is at least one heating resistor.

[0010] Preferably, a blind tube is provided in the square cylinder, the blind tube is located in the fluid, and the heating resistor extends into the blind tube.

[0011] Preferably, the heating power of the heating component is 1 / 5 to 3 / 5 of the rated cooling capacity of the heat exchanger.

[0012] The shell and tube heat exchanger with electric heating proposed in the utility model has the following beneficial effects: by arranging a heating device on the inside or outside of the heat exchanger, the fluid in the barrel is heated to improve the heat exchange efficiency, and the structure is kept compact, suitable for use in new energy vehicles, and the pressure drop of the water channel is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of Example 2 of the present utility model;

[0016] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0017] Among them, 1. square cylinder; 2. end plate; 3. water chamber; 4. heat exchange tube; 5. PTC heater; 6. electric wire; 7. heating coil; 8. blind pipe; 9. heating resistor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Example

[0019] This embodiment proposes a shell and tube heat exchanger with electric heating, comprising a square cylinder 1, end plates 2 are provided at both ends of the square cylinder 1, the end plates and the ends of the cylinder respectively form water chambers 3, a heat exchange tube 4 is provided in the square cylinder 1, the heat exchange tube 4 passes through a baffle, the heat exchange tube 4 passes through the end plate to connect the two water chambers 3, the two water chambers 3 are connected with a water inlet and a water outlet, and the side wall ends of the square cylinder 1 are respectively connected with a liquid inlet pipe and a liquid outlet pipe;

[0020] A heating component is provided on the outside of the square cylinder 1, and the heating component heats the metal square cylinder 1 and reheats the liquid flowing through the square cylinder 1. In this embodiment, the heating component is a PTC heater 5, which is square and attached to the outer wall of the square cylinder 1. The PTC heater 5 is composed of a PTC ceramic heating element and an aluminum tube. This type of PTC heater has the advantages of low thermal resistance and high heat exchange efficiency. It is an automatic constant temperature and power-saving electric heater. It has a sheet structure and can be attached to the outer wall of the square cylinder 1. The outer wall of the square cylinder 1 is heated by the PTC heater. The square cylinder 1 is made of metal. The fluid in the square cylinder 1 is reheated by heat transfer convection. The heating power of the heating component is 1 / 5~3 / 5 of the rated cooling capacity of the heat exchanger to improve the heat exchange efficiency. Example

[0021] This embodiment proposes a shell and tube heat exchanger with electric heating, comprising a square cylinder 1, end plates 2 are provided at both ends of the square cylinder 1, the end plates and the ends of the cylinder respectively form water chambers 3, a heat exchange tube 4 is provided in the square cylinder 1, the heat exchange tube 4 passes through a baffle, the heat exchange tube 4 passes through the end plate to connect the two water chambers 3, the two water chambers 3 are connected with a water inlet and a water outlet, and the side wall ends of the square cylinder 1 are respectively connected with a liquid inlet pipe and a liquid outlet pipe;

[0022] A heating component is provided outside the square cylinder 1, and the heating component heats the metal square cylinder 1 and further heats the liquid flowing through the square cylinder 1. The heating component of this embodiment is a heating coil 7, and the heating coil 7 is arranged outside the square cylinder 1. By energizing the magnetic induction coil, an alternating magnetic field is generated. Since the square cylinder 1 is made of metal, it can generate heat and heat the internal fluid, thereby improving the heat exchange efficiency and maintaining the compactness of the overall structure. Example

[0023] The present embodiment proposes a shell and tube heat exchanger with electric heating, comprising a square cylinder 1, end plates 2 are provided at both ends of the square cylinder 1, the end plates and the ends of the cylinder respectively form water chambers 3, a heat exchange tube 4 is provided in the square cylinder 1, the heat exchange tube 4 passes through a baffle, the heat exchange tube 4 passes through the end plate to connect the two water chambers 3, the two water chambers 3 are connected with a water inlet and a water outlet, and the side wall ends of the square cylinder 1 are respectively connected with a liquid inlet pipe and a liquid outlet pipe; in order to reduce heat loss and improve heat utilization, a heating component is provided inside the square cylinder 1, the heating component heats the liquid flowing through the square cylinder 1, the heating component is at least one heating resistor 9, the heating resistor 9 can be strip-shaped and distributed in the cylinder, or fast-shaped and distributed in the cylinder, and the heating power of the heating component is 1 / 5~3 / 5 of the rated cooling capacity of the heat exchanger.

[0024] In order to prevent the fluid in the barrel from affecting the heating resistor 9, a blind pipe 8 is provided in the square cylinder 1. The blind pipe 8 is made of synthetic fiber, plastic and synthetic rubber. The blind pipe 8 is located in the fluid. The heating resistor 9 extends into the blind pipe 8, which can heat the fluid and improve the heat exchange efficiency. Since the heating component is inside, the heat utilization rate is higher.

Claims

1. A shell and tube heat exchanger with electric heating, comprising a square cylinder, end plates are provided at both ends of the square cylinder, the end plates and the ends of the cylinder respectively form water chambers, a heat exchange tube is provided in the square cylinder, the heat exchange tube passes through the end plates to connect the two water chambers, the heat exchange tube passes through a baffle, characterized in that: A heating component is arranged outside the square cylinder, and the heating component heats the metal square cylinder and further heats the liquid flowing through the square cylinder.

2. The shell and tube heat exchanger with electric heating according to claim 1, characterized in that: The heating component is a PTC heater, which is square and attached to the outer wall of the square cylinder.

3. The shell and tube heat exchanger with electric heating according to claim 1, characterized in that: The heating component is a heating coil, and the heating coil is arranged outside the square cylinder.

4. The shell and tube heat exchanger with electric heating according to claim 1, characterized in that: The heating power of the heating component is 1 / 5 to 3 / 5 of the rated cooling capacity of the heat exchanger.

5. A shell and tube heat exchanger with electric heating, characterized in that: It comprises a square cylinder, end plates are arranged at both ends of the square cylinder, a heat exchange tube is arranged inside the square cylinder, a heating component is arranged inside the square cylinder, and the heating component heats the liquid flowing through the square cylinder.

6. The shell and tube heat exchanger with electric heating according to claim 5, characterized in that: The heating element is at least one heating resistor.

7. The shell and tube heat exchanger with electric heating according to claim 6, characterized in that: A blind tube is arranged in the square cylinder, the blind tube is located in the fluid, and the heating resistor extends into the blind tube.

8. The shell and tube heat exchanger with electric heating according to claim 5, characterized in that: The heating power of the heating component is 1 / 5 to 3 / 5 of the rated cooling capacity of the heat exchanger.

Images