CN202902588U - A new type of electric water heater - Google Patents

Abstract

The utility model discloses a novel electric water heating device, which comprises at least one heating pipe body, wherein the heating pipe body is provided with a central channel, the peripheral wall of each heating pipe body is coated with a resistance film, and the two ends of the resistance film on all the heating pipe bodies are respectively provided with an electrode slice; the heating tube fixing pieces fixed at the two ends of the heating tube body and the inner cavity of the cooling shell form a closed cavity channel, and the resistance film on the heating tube body is externally wrapped with insulating tubes of which the two ends are respectively embedded into the heating tube fixing pieces; the heating tube fixing piece is also provided with a through hole which is convenient for communicating a closed cavity channel formed in the cooling shell with a central channel in the heating tube body; the heating tube fixing parts at the two ends of the cooling shell are respectively provided with an upper end water flow communicating part and a lower end water flow communicating part, and the lower end water flow communicating part is respectively provided with a water inlet joint communicated with a closed cavity channel in the cooling shell and a water outlet joint communicated with a central channel in the heating tube.

Description

A new type of electric water heater

【Technical field】

The utility model relates to the technical field of water heating devices, in particular to a novel electric water heating device.

【Background technique】

At present, household electric water heating devices are more and more widely used, but most of the commonly used electric water heating devices are heating devices using resistance wire heating tubes or resistance film heating tubes. Electric heating equipment such as electric water heaters, coffee machines, water boilers, water dispensers, and kitchens mostly use resistance wire heating, so that the electric heating wires are converted into heat energy due to resistance after being energized. Although this can achieve basic However, there are still some problems with this technical method: first, the cost of obtaining the material of the resistance wire is high; second, the resistance wire needs to be wound during the processing process, which is cumbersome and inconvenient; The resistance wire heating method has the disadvantages of slow heating speed, easy contact with liquid, low safety, and prone to application hazards. In addition, when the resistance wire is powered on, it will produce a red open flame phenomenon, which consumes a lot of power, and when it is used at high temperature, it will consume a lot of oxygen, which will easily damage the indoor air quality; at the same time, because the traditional resistance wire electric heating device will There are open flames, so it is not suitable for oil fields and other occasions with fire protection requirements, which limits its use in occasions.

Secondly, due to the thermal efficiency and heat dissipation problems of the current resistance film heating tubes on the market, the diameter of the resistance film heating tubes cannot be made too large, because if a single resistance film heating tube is too large, when it is energized for heating, it will be heated due to heating. The tube has no automatic heat dissipation device, only the heat insulation layer. The heat emitted by the tube body cannot be taken away in time, and the heat dissipation effect is not good. The surface temperature of the heating tube heated by the power for a long time is getting higher and higher, and the phenomenon of tube explosion and burning occurs; Even if multiple tubes are arranged side by side, the overall heating efficiency is low, the heat dissipation function is not good, and the tubes are easy to burst and burn. The service life of the entire heating element is very short; , the heating efficiency is generally low; as shown in Figure 1, often need a plurality of resistance film heating tubes 1 series heating, specifically the upper and lower ends of the resistance film heating tube 1 are communicated with the water flow provided separately and the heating tube fixing part 2 will connect multiple Groups of resistive film heating tubes 1 are connected in series and fixedly connected, and then multiple groups of resistive film heating tubes 1 are wrapped with heat insulating material layer 3 and metal protective shell 4. The cost is high, the heating and heat dissipation effects are poor, and it does not have the current new market advantage. .

【Content of utility model】

The utility model provides a novel electric water heating device with simple structure, high heating efficiency, good heat dissipation effect, safe and reliable operation, low cost, self-cooling and waste heat recovery structure.

In order to achieve the above object, the utility model provides the following technical solutions:

A new type of electric water heating device, comprising at least one heating pipe body, the heating pipe body has a central passage for fluid to flow through, the outer peripheral wall of each heating pipe body is coated with a resistance film, and the two ends of the resistance film on all heating pipe bodies are The electrode sheets connected to the power supply are respectively provided. After the electricity is turned on, the resistance film generates heat due to the electric energy, and heats the fluid flowing through the central channel of the heating pipe body; a sealed cylindrical cooling tube is set on the periphery of all the heating pipes. The outer shell is sealed and nested with heat pipe fixing parts at both ends of the cooling shell to facilitate the fixed connection of at least one heating pipe body. The heat pipe fixing parts respectively fixed at both ends of the heating pipe body and the inner cavity of the cooling shell form a closed cavity. channel, the resistance film on each heating tube body is wrapped with an insulating tube isolated from the channel of the closed cavity and the two ends are respectively nested in the fixing part of the heating tube; The closed cavity channel of the closed cavity communicates with the central channel in each heating tube body; the heating tube fixing parts at both ends of the cooling shell are respectively provided with the closed cavity channel formed in the cooling shell and the center channel in each heating tube body. The channel constitutes the upper end water flow connecting piece and the lower end water flow connecting piece that pass through the flow channel, and the lower end water flow connecting piece is also provided with a water inlet joint that communicates with the closed cavity channel in the cooling shell and a water connection that communicates with the central channel in the heating tube body. Outlet connector.

The through-holes on the heat-generating pipe fixing member and the closed cavity channel in the cooling shell are small-diameter channel holes, and the through-holes communicated with the central channel in each heat-generating tube body are equal-diameter channel holes; to achieve the closed cavity channel The flow rate of the inner water flow is faster than that of the central channel of the heating pipe, which can better dissipate heat from the heating pipe.

The cooling shell is in the shape of a flat cylinder.

The electrode sheets are silver electrodes.

The beneficial effects of the utility model are:

The heating pipe fixing parts at both ends of the heating pipe body of the utility model and the inner cavity of the cooling shell form a closed cavity channel, and the closed cavity formed in the cooling shell is formed by the upper end water flow connecting piece and the lower end water flow connecting piece at both ends of the cooling shell. The channel communicates with the central channel in the heating pipe body, so that when the cold water during heating passes through the closed cavity channel formed in the cooling shell, the cold water that needs to be heated can be pre-heated, so that the continuously flowing cold water can be continuously heated. The heating tube wrapped in the insulating tube is cooled and cooled, so that the heating tube will not burst and burn out due to the gradual increase in the temperature of the tube body when the heating tube is energized and heated.

Such a circulating water-cooled self-cooling system design can make the diameter of the currently used heating tube larger and the thermal efficiency higher; The new type of heating element, regardless of single tube or multiple rows of tubes, uses the structure of the heating tube fixing part and the inner cavity of the cooling shell to form a closed cavity channel, which pre-cools the heating tube body and preheats the heating water when the heating is energized. Both greatly improve the heat dissipation function and heating efficiency of the heating pipe body, save the heat insulation protection structure of the current heating pipe body, reduce the production cost and raw material cost, and achieve the effect of killing multiple birds with one stone. Compared with the traditional heating structure, the power density of the heating tube with the same diameter, the same length and the same process can be made higher than the traditional one, which means that the power of the heating tube used in this structure is higher than that of the traditional one.

【Description of drawings】

Fig. 1 is the structural representation of prior art;

Fig. 2 is a schematic diagram of a half-section enlarged structure of Embodiment 1 of the utility model;

Fig. 3 is a schematic diagram of an exploded enlarged structure of Embodiment 1 of the present utility model.

Fig. 4 is a schematic diagram of the explosion structure of Embodiment 2 of the present invention.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

【Detailed ways】

Embodiment one

A new type of electric water heating device, as shown in Figure 2 and Figure 3, includes a heating pipe body 5, the heating pipe body 5 has a central channel 50 for fluid to flow through, and the outer peripheral wall of the heating pipe body 5 is coated with a resistive film 6 The two ends of the resistance film 6 on the heating pipe body 5 are respectively provided with electrode sheets 7 connected to the power supply. The electrode sheets 7 are silver electrodes. The fluid in the channel 50 is heated; the heating tube body 5 and its upper resistance film 6 are large-diameter and high-power heating tube bodies, and a cooling shell 8 with a flat cylindrical sealing structure is set on the periphery of the heating tube body 5. The two ends of the cooling shell 8 are respectively sealed and nested with the heat pipe fixing parts 9 which are convenient for the fixed connection of the heating pipe body 5. The cavity passage 10, the resistance film 6 on the heating tube body 5 is covered with an insulating tube 11 which is isolated from the closed cavity passage 10 and whose two ends are nested in the heating tube fixing member 9 respectively. Also be provided with the through-hole 90 that is convenient to the closed cavity channel 10 that forms in the cooling shell 8 and the central passage 50 in the heat-generating tube body 5 on the heating pipe fixing part 9; The closed cavity channel 10 formed in the cooling shell and the central channel 50 in the heating pipe body 5 are respectively provided with an upper end water flow connecting piece 12 and a lower end water flow connecting piece 13 forming a through flow channel, and the lower end water flow connecting piece 13 is also respectively A water inlet joint 14 communicating with the closed cavity channel 10 in the cooling shell 8 through a through hole 90 and a water outlet joint 15 communicating with the central channel 50 in the heating pipe body 5 are provided.

As shown in Figure 2 and Figure 3, the through hole 90 on the heat pipe fixing member 9 and the closed cavity passage 10 in the cooling shell 8 is a small diameter passage hole, which communicates with the central passage 50 in the heat pipe body 5 The through holes 90 are equal diameter channel holes.

Embodiment two

As shown in Figure 4, the only difference from Embodiment 1 is that the electric water heater includes three heating pipe bodies 5, each heating pipe body 5 has a central channel 50 for fluid to flow through, and each heating pipe body The outer peripheral wall of the heating pipe body 5 is covered with a resistance film 6, and the two ends of the resistance film 6 on all heating pipe bodies 5 are respectively provided with electrode sheets 7 connected to the power supply; the outer periphery of all heating pipe bodies 5 is provided with a cooling shell 8 in a sealed cylindrical shape, The two ends of the cooling shell 8 are respectively sealed and nested with the heat pipe fixing parts 9 which are convenient for the fixed connection of the three heating pipe bodies. A closed cavity channel 10 is formed. The resistance film on each heating tube body 5 is covered with an insulating tube 11 isolated from the closed cavity channel 10 and the two ends are respectively nested in the heating tube fixing part 9. At the same time, the heat pipe body 5 heats the water body after preheating the closed cavity channel 10 to provide hot water with a larger flow rate and higher efficiency.

The heating pipe fixing parts 9 at both ends of the heating pipe body 5 of the utility model and the inner cavity of the cooling shell 8 form a closed cavity channel (not shown in the figure), and the upper end water flow connecting parts 12 and the lower end water flow through the two ends of the cooling shell 8 The connecting member 13 communicates the closed cavity channel (not shown) formed in the cooling shell 8 with the central channel 50 in the heating pipe body 5, so that the cold water during heating passes through the closed cavity channel 10 formed in the cooling shell 8 first. In this method, the cold water to be heated can be pre-heated, and the heating tube body 5 coated with the resistive film 6 can be cooled down, which effectively improves the heating efficiency of the heating tube body 5 coated with the resistive film 6 .

The above-described embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of implementation of the present utility model. For example, there can be two, four or more heating pipes; Obvious changes made in shape, structure and principle, as well as other changes that do not depart from the essence of the utility model, should be covered within the protection scope of the utility model.

Claims (3)

1. A novel electric water heating device, comprising at least one heating pipe body, the heating pipe body has a central channel for fluid to flow through, the outer peripheral wall of each heating pipe body is coated with a resistance film, and the resistance film on all heating pipe bodies The two ends are respectively provided with electrode sheets connected to the power supply. After the electricity is turned on, the resistance film generates heat due to electric energy, and heats the fluid flowing through the central channel of the heating tube body; it is characterized in that, A cooling shell in the form of a sealed cylinder is set on the periphery of all the heating pipes, and the two ends of the cooling shell are respectively sealed and nested with heating pipe fixing parts that facilitate the fixed connection of at least one heating pipe body. The heating pipe fixing part and the inner cavity of the cooling shell form a closed cavity channel, and the resistance film on each heating tube body is covered with an insulating tube which is isolated from the closed cavity channel and whose two ends are respectively nested in the heating tube fixing part ; The heating pipe fixing part is also provided with a through hole that facilitates the communication between the closed cavity channel formed in the cooling shell and the central channel in each heating tube body; The heating pipe fixing parts at both ends of the cooling shell are also respectively provided with an upper end water flow connecting piece and a lower end water flow connecting piece that facilitate the closed cavity channel formed in the cooling shell and the central channel in each heating pipe body to form a through flow channel. The water flow connecting piece or/and the upper end water flow connecting piece are respectively provided with a water inlet joint communicating with the closed cavity channel in the cooling shell and a water outlet joint communicating with the central channel in the heating tube body. 2. A new type of electric water heating device according to claim 1, characterized in that, the through hole between the heat pipe fixing part and the closed cavity channel in the cooling shell is a small diameter channel hole, which is connected with each heating tube. The through holes connected with the central channel in the heat pipe body are equal-diameter channel holes. 3. A new type of electric water heating device according to claim 1, characterized in that the electrode sheet is a silver electrode.

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