Central electric heater

Abstract

The present invention discloses a central electric heater, which relates to the field of thermal energy technology and makes up for the shortcomings of the existing boiler thermal network heating system. The main technical scheme of the present invention is: a central electric heater, the device includes: a furnace body and a heating part; the furnace body includes an upper furnace body and a lower furnace body that are connected as one, the side wall of the upper furnace body is evenly distributed with heat dissipation holes, and the side wall of the lower furnace body is evenly distributed with air intake holes; the heating part includes a heating mechanism, a conveying mechanism, an exhaust mechanism and a heating pipe, the heating mechanism, the conveying mechanism and the exhaust mechanism are respectively installed in the lower furnace body, the heating mechanism is used to heat the heat-conducting medium, the exhaust mechanism is used to drive the air inside the furnace body to flow upward, the heating pipe is installed in the upper furnace body, and a plurality of fins are arranged on the outer side of the pipe wall of the heating pipe, the inlet of the conveying mechanism is connected to the outlet of the heating mechanism, the outlet of the conveying mechanism is connected to one end of the heating pipe, and the other end of the heating pipe is connected to the inlet of the heating mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of thermal energy, and in particular to a central electric heater. Background Art

[0002] With the development of society, cities generally use boiler heat pipe network heating. However, for indoor environments such as large venues, lecture halls, and large camping tents where the heat pipe network heating system cannot cover or meet the needs, a highly efficient heating device is needed to meet the heating needs of people in the above environments. Summary of the invention

[0003] In view of this, the present invention provides a central electric heater, the main purpose of which is to solve the problems in the background technology.

[0004] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0005] The present invention provides a central electric heater, which comprises: a furnace body and a heating part;

[0006] The furnace body comprises an upper furnace body and a lower furnace body which are connected to each other as a whole, the side wall of the upper furnace body is evenly distributed with heat dissipation holes, and the side wall of the lower furnace body is evenly distributed with air inlet holes;

[0007] The heating part includes a heating mechanism, a conveying mechanism, an exhaust mechanism and a heating pipe. The heating mechanism, the conveying mechanism and the exhaust mechanism are respectively installed in the lower furnace body. The heating mechanism is used to heat the heat-conducting medium. The exhaust mechanism is used to drive the air inside the furnace body to flow upward. The heating pipe is installed in the upper furnace body. A plurality of fins are arranged on the outer side of the pipe wall of the heating pipe. The inlet of the conveying mechanism is connected to the outlet of the heating mechanism, the outlet of the conveying mechanism is connected to one end of the heating pipe, and the other end of the heating pipe is connected to the inlet of the heating mechanism.

[0008] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0009] Optionally, the heating tube includes a plurality of straight tubes and a plurality of arc tubes, the straight tubes and the arc tubes are alternately connected, the plurality of straight tubes are arranged in a cluster along the axial direction of the upper furnace body, and the plurality of fins are arranged on the outer side of the tube wall of the straight tube.

[0010] Optionally, each of the heat dissipation holes is connected to one end of a heat dissipation pipe, and the other end of the heat dissipation pipe is inclined downward.

[0011] Optionally, the inner surface of the top wall of the upper furnace body is connected to an inverted cone, and a center line of the inverted cone coincides with a center line of the upper furnace body.

[0012] Optionally, the outlet of the conveying mechanism is connected to one end of an exhaust pipe, and the other end of the exhaust pipe is connected to an exhaust valve.

[0013] Optionally, the inlet of the heating mechanism is connected to one end of the buffer tube, and the other end of the buffer tube is connected to the buffer tank.

[0014] Optionally, the lower end surface of the lower furnace body is connected to a plurality of universal wheels.

[0015] Optionally, a temperature controller and a touch screen are installed on the side wall of the lower furnace body, the input end of the temperature controller is connected to the touch screen, and the output end of the temperature controller is respectively connected to the heating mechanism and the conveying mechanism.

[0016] By means of the above technical solution, the present invention has at least the following advantages:

[0017] When the device is normally used, the heat-conducting medium circulates back and forth between the heating mechanism and the heating tube due to the driving of the conveying mechanism, and the heat-conducting medium carries the heat generated by the heating mechanism to the heating tube. Under the drainage action of the exhaust mechanism, the outside air enters the furnace body through the air inlet and rises, and the heat-conducting medium and the air in the furnace body transfer heat to each other. After the air temperature in the upper furnace body rises, it is discharged through the heat dissipation holes. Because there are multiple fins arranged on the outer side of the tube wall of the heating tube, the contact surface area between the heating tube and the air is increased, the heat dissipation rate of the heat-conducting medium in the heating tube is increased, and the efficiency of the furnace body to emit hot air outward through the heat dissipation holes is improved. Compared with the traditional boiler heating and heating method, this device is more compact, easy to move, and has higher energy conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A side view of a central heating furnace provided by an embodiment of the present invention;

[0019] Figure 2 A side cross-sectional view of a central heating furnace provided in an embodiment of the present invention.

[0020] The figure marks in the drawings of the specification include: upper furnace body 1, lower furnace body 2, heat dissipation holes 3, air inlet holes 4, heating mechanism 5, conveying mechanism 6, exhaust mechanism 7, heating pipe 8, tank body 9, heater 10, inverted cone 11, exhaust pipe 12, exhaust valve 13, buffer pipe 14, buffer tank 15, universal wheel 16, temperature controller 17, display screen 18, leakage protection switch 19, fin 20. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 and Figure 2 As shown, one embodiment of the present invention provides a central electric heater, which includes: a furnace body and a heating part;

[0024] The furnace body comprises an upper furnace body 1 and a lower furnace body 2 which are connected to each other as a whole. The side wall of the upper furnace body 1 is evenly distributed with heat dissipation holes 3, and the side wall of the lower furnace body 2 is evenly distributed with air inlet holes 4.

[0025] The heating part includes a heating mechanism 5, a conveying mechanism 6, an exhaust mechanism 7 and a heating tube 8. The heating mechanism 5, the conveying mechanism 6 and the exhaust mechanism 7 are respectively installed in the lower furnace body 2. The heating mechanism 5 is used to heat the heat-conducting medium. The exhaust mechanism 7 is used to drive the air inside the furnace body to flow upward. The heating tube 8 is installed in the upper furnace body 1. A plurality of fins 20 are arranged on the outer side of the tube wall of the heating tube 8. The inlet of the conveying mechanism 6 is connected to the outlet of the heating mechanism 5, the outlet of the conveying mechanism 6 is connected to one end of the heating tube 8, and the other end of the heating tube 8 is connected to the inlet of the heating mechanism 5.

[0026] The working process of the central electric heater is as follows:

[0027] When the device is normally used, due to the driving of the conveying mechanism 6, the heat-conducting medium circulates back and forth between the heating mechanism 5 and the heating tube 8, and the heat-conducting medium carries the heat generated by the heating mechanism 5 to the heating tube 8. Under the drainage action of the exhaust mechanism 7, the outside air enters the furnace body through the air inlet 4 and rises, and the heat-conducting medium and the air in the furnace body transfer heat to each other. After the air temperature in the upper furnace body 1 rises, it is discharged through the heat dissipation hole 3. Because a plurality of fins 20 are arranged on the outer side of the tube wall of the heating tube 8, the contact surface area between the heating tube 8 and the air is increased, the heat dissipation rate of the heat-conducting medium in the heating tube 8 is increased, and the efficiency of the furnace body radiating hot air outward through the heat dissipation hole 3 is improved.

[0028] In the technical solution of the present invention, compared with the traditional boiler heating method, the device is more compact, easier to move, and has higher energy conversion efficiency.

[0029] Specifically, the heat transfer medium is heat transfer oil, the conveying mechanism 6 is a heat transfer oil pump, and the heating mechanism 5 is an electric heating furnace. The electric heating furnace includes a tank body 9 and a heater 10 installed at the upper end of the tank body 9. The heater 10 is provided with a metal tube with a resistance wire installed therein, and the metal tube extends into the tank body 9, and the tank body 9 is filled with heat transfer oil. The outlet of the heating mechanism 5 is located at the upper end side of the tank body 9, and the inlet of the heating mechanism 5 is located at the lower end side of the tank body 9. The inlet of the heat transfer oil pump extends into the tank body 9 from the upper end side of the tank body 9 through a pipeline to extract the heat transfer oil. If the heat transfer oil flows back to the tank body 9 from the upper end side of the tank body 9, the heat transfer oil just entering the tank body 9 falls freely to its liquid surface, and the liquid surface is easily agitated and bubbles are generated. In the embodiment, the heat transfer oil flowing back through the other end of the heating pipe 8 enters the tank body 9 through the lower end side of the tank body 9, and it is not easy to generate bubbles, which reduces the obstruction of the gas to the flow of the heat transfer medium, and is conducive to the flow stability when the heat transfer oil pump extracts the heat transfer oil.

[0030] Specifically, the exhaust mechanism 7 is an exhaust fan, and the exhaust mechanism 7 is located above the air inlet 4, so that the outside air flows upward as soon as it enters the lower furnace body 2 through the air inlet 4. The exhaust mechanism 7 is installed above the heating mechanism 5 and the conveying mechanism 6, and the cold air just entering the furnace body also has a certain cooling effect on the electrical components of the heater 10 and the motor of the thermal oil pump, which is beneficial to the long-term operation of the electrical components and the thermal oil pump.

[0031] Specifically, the top wall of the upper furnace body 1 is in an umbrella shape, and the inner surface of the umbrella-shaped top wall is a curved surface, the center of the curved surface is high and the edge is low. When the air in the furnace body rises from the top wall and diffuses around, the edge of the curved top wall has a larger curvature radius than the edge of the flat top wall, and the resistance coefficient of air flow is smaller, which is conducive to the diffusion of air after sufficient heat exchange to the surroundings.

[0032] like Figure 2 As shown, in a specific embodiment, the heating tube 8 includes a plurality of straight tubes and a plurality of arc tubes, the straight tubes and the arc tubes are alternately connected, the plurality of straight tubes are arranged in a cluster along the axial direction of the upper furnace body 1, and a plurality of fins 20 are arranged on the outer side of the tube wall of the straight tube.

[0033] In this embodiment, specifically, straight tubes and arc tubes are alternately connected to form channels for heat-conducting media; the straight tubes are arranged in a clustered manner to reduce the overall volume occupied by the heating tube 8; on the basis of the above, a plurality of fins 20 are arranged on the outside of the tube wall of the straight tube, thereby ensuring that the heat exchange area of ​​the outer side of the tube wall of the heating tube 8 is not reduced, ensuring that the air diffused through the heat dissipation holes 3 has a certain temperature, so that the air around the device is heated to meet people's room temperature requirements.

[0034] In a specific implementation, each heat dissipation hole 3 is connected to one end of a heat dissipation pipe, and the other end of the heat dissipation pipe is inclined downward.

[0035] In the previous embodiment, due to the drainage effect of the exhaust mechanism 7, the air in the furnace body flows upward. However, when the air flows to the height of the heat dissipation hole 3, it gradually forms a tendency to diffuse outside the furnace body, and the air inside the furnace body cannot be fully heated and is discharged from the furnace body. In this embodiment, the other end of the heat dissipation pipe is tilted downward, and the air in the furnace body must flow down along the heat dissipation pipe to a distance before it can be completely discharged. This overcomes the natural property of the air rising naturally, so in the furnace body, the tendency of the air to diffuse outside the furnace body before it is fully heated is avoided to a certain extent, and the residence time of the unit volume of air in the furnace body is prolonged, and the time for the air in the furnace body to be heated is prolonged.

[0036] like Figure 2 As shown, in a specific embodiment, the inner surface of the top wall of the upper furnace body 1 is connected to the inverted cone 11 , and the center line of the inverted cone 11 coincides with the center line of the upper furnace body 1 .

[0037] If there is no inverted cone 11, the trajectory of the air reaching the top wall of the upper furnace body 1 to diffuse to the surroundings is relatively chaotic. In this embodiment, specifically, the side where the generatrix of the inverted cone 11 is located is concave inward, and extends integrally with the inner surface of the top wall to form a streamlined curved surface, and the resistance coefficient of air flow is small; the center line of the inverted cone 11 coincides with the center line of the upper furnace body 1, and the inverted cone 11 and the top wall form a central symmetrical structure, which can force the fully heated air to diffuse to the surroundings with the center line of the inverted cone 11 as the center.

[0038] like Figure 2 As shown, in a specific embodiment, the outlet of the conveying mechanism 6 is connected to one end of the exhaust pipe 12 , and the other end of the exhaust pipe 12 is connected to the exhaust valve 13 .

[0039] In this embodiment, specifically, the other end of the exhaust pipe 12 is higher than the top wall of the upper furnace body 1. When the device is just started, it is inevitable that there is gas-liquid entrainment in the heating tube 8, and the gas blocks the smooth reciprocating flow of the heat transfer medium between the heating tube 8 and the heating mechanism 5. At this time, the exhaust valve 13 can be opened and the conveying mechanism 6 can be started to discharge the gas to ensure the smooth flow of the heat transfer medium.

[0040] like Figure 2 As shown, in a specific embodiment, the inlet of the heating mechanism 5 is connected to one end of the buffer tube 14 , and the other end of the buffer tube 14 is connected to the buffer tank 15 .

[0041] In this embodiment, specifically, the other end of the buffer tube 14 is higher than the top wall of the upper furnace body 1. When the exhaust valve 13 is closed, during the operation of the device, if there is still a phenomenon that gas blocks the heat transfer medium in the channel formed by the heating tube 8 and the tank body 9 of the heating mechanism 5, the buffer tank 15 is located at the highest point of the channel, and the gas can push part of the heat transfer medium along the buffer tube 14 to the buffer tank 15, and make part of the gas rise to the buffer tank 15, so as to reduce the gas in the channel blocking the flow of the heat transfer medium.

[0042] like Figure 1 and Figure 2 As shown, in a specific embodiment, the lower end surface of the lower furnace body 2 is connected to a plurality of universal wheels 16 .

[0043] In this embodiment, by pushing the side of the furnace body, the furnace body equipped with the universal wheels 16 can be moved to a desired position in a large venue.

[0044] like Figure 2 As shown, in a specific embodiment, a temperature controller 17 and a touch screen 18 are installed on the side wall of the lower furnace body 2, the input end of the temperature controller 17 is connected to the touch screen 18, and the output end of the temperature controller 17 is connected to the heating mechanism 5 and the conveying mechanism 6 respectively.

[0045] In this embodiment, the touch screen 18 can be used to input control parameters; the output end of the temperature controller 17 is connected to the junction box of the heater 10 and the thermal oil pump of the heating mechanism 5, and is used to send start and stop instructions to the heater 10 and the thermal oil pump, and the input end of the temperature controller 17 is connected to the touch screen 18, and is used to receive parameter signals input by the operator through the touch screen 18. At the same time, temperature sensors are also installed on the tank body 9 and the heating tube 8, respectively. The temperature sensors are connected to the input end of the temperature controller 17. The temperature sensors transmit a level signal representing the actual temperature value of the heat-conducting medium to the temperature controller 17, so that the temperature controller 17 performs feedback control on the heater 10 and the thermal oil pump, so as to accurately control the heating power of the heater 10 and the delivery power of the thermal oil pump, so as to achieve the consistency between the actual temperature value of the heat-conducting medium and the set value of the operator.

[0046] The input end of the temperature controller 17 and the touch screen 18 are wirelessly connected via a WIFI signal. The touch screen 18 is detachably connected to the side wall of the lower furnace body 2 so that people can hold the touch screen 18 and remotely send parameter signals to the temperature controller 17 to achieve remote control of the device.

[0047] Specifically, a power supply is also included to provide power to the temperature controller 17, the heater 10 and the thermal oil pump.

[0048] Specifically, it also includes a leakage protection switch 19, which is respectively connected to the power supply, the junction box of the thermal oil pump and the heater 10, so as to improve the safety factor of the operation of the device.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A central electric heater, characterized in that: include: A furnace body, the furnace body comprising an upper furnace body and a lower furnace body connected in one piece, the side wall of the upper furnace body is evenly distributed with heat dissipation holes, and the side wall of the lower furnace body is evenly distributed with air inlet holes; A heating part, the heating part comprises a heating mechanism, a conveying mechanism, an exhaust mechanism and a heating pipe, the heating mechanism, the conveying mechanism and the exhaust mechanism are respectively installed in the lower furnace body, the heating mechanism is used to heat the heat-conducting medium, the exhaust mechanism is located above the air inlet, and is used to drive the air inside the furnace body to flow upward, the heating pipe is installed in the upper furnace body, a plurality of fins are arranged on the outer side of the pipe wall of the heating pipe, the inlet of the conveying mechanism is connected to the outlet of the heating mechanism, the outlet of the conveying mechanism is connected to one end of the heating pipe, and the other end of the heating pipe is connected to the inlet of the heating mechanism; Each of the heat dissipation holes is connected to one end of a heat dissipation pipe, and the other end of the heat dissipation pipe is inclined downward.

2. The central electric heater according to claim 1, characterized in that: The heating tube comprises a plurality of straight tubes and a plurality of arc tubes, the straight tubes and the arc tubes are alternately connected, the plurality of straight tubes are arranged in a clustered manner along the axial direction of the upper furnace body, and the plurality of fins are arranged on the outer side of the tube wall of the straight tube.

3. The central electric heater according to claim 1, characterized in that: The inner surface of the top wall of the upper furnace body is connected to the inverted cone, and the center line of the inverted cone coincides with the center line of the upper furnace body.

4. The central electric heater according to any one of claims 1 to 3, characterized in that: The outlet of the conveying mechanism is connected to one end of an exhaust pipe, and the other end of the exhaust pipe is connected to an exhaust valve.

5. The central electric heater according to claim 4, characterized in that: The inlet of the heating mechanism is connected to one end of the buffer tube, and the other end of the buffer tube is connected to the buffer tank.

6. The central electric heater according to any one of claims 1 to 3, characterized in that: The lower end surface of the lower furnace body is connected to a plurality of universal wheels.

7. The central electric heater according to any one of claims 1 to 3, characterized in that: A temperature controller and a touch screen are installed on the side wall of the lower furnace body. The input end of the temperature controller is connected to the touch screen, and the output end of the temperature controller is connected to the heating mechanism and the conveying mechanism respectively.

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