Electric heating device

Abstract

The utility model relates to an electric heating device capable of rapidly heating water. The electric water heater comprises an electric heating pipe and a water pipe arranged outside the electric heating pipe, a spiral protrusion is arranged on the water pipe, a water inlet and a water outlet are formed in the spiral protrusion, and the inner surface of the water pipe between the head end and the tail end of the water pipe is fixedly matched with the outer surface of the electric heating pipe except the spiral protrusion, so that a spiral waterway is formed on the outer surface of the water pipe. A kick type temperature controller and a temperature sensor are arranged on the outer surface of the spiral protrusion, the temperature measuring face of the kick type temperature controller is a plane, the outer surface, corresponding to the temperature measuring face of the kick type temperature controller, of the spiral protrusion is a first plane, the first plane is parallel to the temperature measuring face and tightly attached to or separated from the temperature measuring face, and the local outer surface of the spiral protrusion is a second plane. The second plane is used for laying the electric heating device on the horizontal plane. According to the utility model, the plane is additionally arranged on the spiral bulge, so that the electric heating device can be conveniently laid flat to weld the water inlet, the temperature protection sensor is mounted by welding the nut, and the temperature measurement surfaces of the kick type temperature controller are arranged in parallel, so that the temperature measurement accuracy of the kick type temperature controller can be improved; and the temperature sensor arranged on the surface of the water pipe can further ensure the use safety.

Description

Technical Field

[0001] The utility model relates to an electric heating device capable of quickly heating water. Background Art

[0002] Existing instant heating electric heating devices, such as instant electric kettles, steam mops, steam irons, cooking utensils for steaming and boiling, etc., which are small household appliances that need to quickly produce hot water or steam, mostly use thick film heating tubes at present. The heating tubes of this heating method cannot be dry burned, the water pipes are prone to explosion, the thermal efficiency is low, there is water hidden in the tubes, and the way is that the heating tube wraps the water pipe; there is also a traditional resistance wire heating tube, with a water pipe sleeved on the outer surface of the electric heating tube, and the water flows linearly between the inner and outer two tube bodies. This heating method still has low thermal efficiency and large thermal inertia. In order to quickly produce hot water, only the power of the electric heating tube can be increased or the linear length of the water pipe can be extended, and it is impossible to make a cylindrical shape. The surfaces of existing traditional heating tubes are basically cylindrical, which is not easy to be placed flat during production for welding other parts, and it is difficult to set relevant sensors and temperature controllers on the surface of the water pipe, and the production cost is relatively high.

[0003] In addition, there is also a traditional resistance wire heating tube. One or two heating tubes clamp the water pipe through welding. This heating method also has low thermal efficiency, and the way is also that heat wraps water, and the surface temperature is very high. The most crucial thing is that both this heating tube and the water pipe are made of aluminum material and are connected by brazing, and it is very difficult to achieve food grade. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electric heating device with high thermal efficiency, reliable and durable, high safety, and easy to produce.

[0005] The above purpose is achieved as follows.

[0006] An electric heating device includes an electric heating tube and a water pipe arranged outside the electric heating tube. The water pipe includes a spiral protrusion spirally extending from one end of the water pipe to the other end. The spiral protrusion is provided with a water inlet and a water outlet. Except for the spiral protrusion, the inner surface of the other part of the water pipe between the head and tail ends of the water pipe is fixedly matched with the outer surface of the electric heating tube, so as to form a spiral water path between the inner surface of the spiral protrusion and the outer surface of the electric heating tube. A snap-action thermostat and a temperature sensor are arranged on the outer surface of the spiral protrusion. The temperature measuring surface of the snap-action thermostat is a plane. The outer surface of the spiral protrusion corresponding to the temperature measuring surface of the snap-action thermostat is a first plane, and the first plane is arranged parallel to the temperature measuring surface. The first plane is in close contact with or separated from the temperature measuring surface. There is also a local outer surface of the spiral protrusion that is a second plane, and the second plane is used for the electric heating device to be placed flat on a horizontal plane.

[0007] The purpose of the utility model can also be solved by the following technical measures.

[0008] Preferably, the temperature sensor is pressed against the outer surface of the spiral protrusion by a pressing plate, and the pressing plate is fixedly connected to the outer surface of the spiral protrusion by a nut.

[0009] Preferably, a third plane for fixing the snap-action thermostat is further provided around the first plane, and the snap-action thermostat is welded to the third plane by a nut.

[0010] Preferably, the spiral protrusion wraps the electric heating tube.

[0011] After adopting the above technical solution, the utility model facilitates laying the electric heating device flat for welding the water inlet by adding a plane on the spiral protrusion, and can install the temperature protection sensor by welding nuts on the plane. The arrangement of the temperature measuring surfaces of the snap-action thermostats parallel and separated from each other on the first plane can improve the temperature measuring accuracy of the snap-action thermostats. The temperature sensor arranged on the surface of the water pipe can further ensure safety during use. And the spiral water path wraps the heating tube, which can extend the water path and extremely improve the heat conversion efficiency. During this process, the heat of the heating tube is carried away by water, and the surface temperature of the electric heating device is reduced as much as possible, improving safety. Description of the Drawings

[0012] Figure 1 It is a top view of the electric heating device.

[0013] Figure 2 It is a right view of the electric heating device.

[0014] Figure 3 It is a top view of the electric heating device with the snap-action thermostat removed.

[0015] Figure 4 It is a bottom view of the electric heating device.

[0016] Figure 5 It is a left view of the electric heating device. Detailed Embodiment

[0017] The present utility model will be further described below in conjunction with the drawings and the detailed embodiment.

[0018] Combined with Figure 1An electric heating device comprises an electric heating tube 1 and a water pipe 2 arranged outside the electric heating tube 1, wherein the water pipe 2 comprises a spiral protrusion 3 spirally extending from one end of the water pipe 2 to the other end, a water inlet 51 is arranged at one end of the spiral protrusion 3, and a water outlet 52 is arranged at the other end of the spiral protrusion 3. Except for the spiral protrusion 3, the inner surface of the water pipe 2 between the water inlet 51 and the water outlet 52 is fixedly matched with the outer surface of the electric heating tube 1, so that a spiral water path is formed between the inner surface of the spiral protrusion 3 and the outer surface of the electric heating tube 1. The spiral water path wraps the heating tube, which can extend the water path and greatly improve the heat conversion efficiency. The heat of the heating tube is taken away by water, which reduces the surface temperature of the electric heating device as much as possible and improves the safety.

[0019] The interval D between two adjacent spiral protrusions 3 monomers in the spiral protrusion 3 is between 12-20 mm. A further improvement is that the interval D between two adjacent spiral protrusions 3 monomers in the spiral protrusion 3 is between 15-17 mm. The optimal state is that the interval D between two adjacent spiral protrusions 3 monomers in the spiral protrusion 3 is 16 mm. Since the diameter of the electric heating tube 1 of the rapid heating device of small household appliances is basically fixed at about 10 mm, the household rapid electric heating device only needs to limit the interval D between two spiral protrusions 3 monomers.

[0020] Combination Figure 2 and Figure 3 A first plane 6 and a third plane 62 are provided on the spiral protrusion 3 of the water pipe 2. The snap-type thermostat 4 is welded on the third plane 62 through a nut. The temperature measuring surface of the snap-type thermostat 4 is arranged directly above the first plane 6 and parallel to the first plane 6. The first plane 6 is tightly attached to the temperature measuring surface so that the temperature measurement data of the snap-type thermostat 4 is accurate. The technical solution has two snap-type thermostats 4, one of which is tightly attached to the temperature measuring surface and the other is separated.

[0021] Combination Figure 4 The electric heating device is provided with a second plane 61, which is used to fix the electric heating device on the operating plane when welding the water inlet 51 and the water outlet 52. The electric heating devices in the prior art are usually cylindrical, which is not conducive to fixing on the operating plane for parts installation. The second plane 61 can make the operation of installing parts easier. The second plane 61 can be set on any spiral protrusion 3, and the location setting depends on the plan during production.

[0022] Combination Figure 5 The outer surface of the spiral protrusion 3 is provided with a temperature sensor 7. The temperature sensor 7 is pressed on the outer surface of the spiral protrusion 3 by a pressing plate 71. The temperature sensor 7 arranged on the outer surface of the spiral protrusion 3 can further ensure safety during use.

Claims

1. An electric heating device, comprising an electric heating tube and a water pipe arranged outside the electric heating tube, wherein the water pipe comprises a spiral protrusion extending spirally from one end of the water pipe to the other end, and a water inlet and a water outlet are arranged on the spiral protrusion. The inner surface of the water pipe between the first and last ends of the water pipe, except for the spiral protrusion, is fixedly matched with the outer surface of the electric heating tube so that a spiral water path is formed between the inner surface of the spiral protrusion and the outer surface of the electric heating tube, characterized in that: The outer surface of the spiral protrusion is provided with a snap-type thermostat and a temperature sensor. The temperature measuring surface of the snap-type thermostat is a plane. The outer surface of the spiral protrusion corresponding to the temperature measuring surface of the snap-type thermostat is a first plane. The first plane is arranged parallel to the temperature measuring surface. The first plane is closely attached to or separated from the temperature measuring surface. The spiral protrusion also has a partial outer surface as a second plane. The second plane is used to place the electric heating device flat on a horizontal plane.

2. The electric heating device according to claim 1, characterized in that: The temperature sensor is pressed onto the outer surface of the spiral protrusion via a pressing plate, and the pressing plate is fixedly connected to the outer surface of the spiral protrusion via a nut.

3. The electric heating device according to claim 1, characterized in that: A third plane for fixing the snap-action thermostat is also provided around the first plane, and the snap-action thermostat is welded on the third plane through nuts.

4. The electric heating device according to claim 1, characterized in that: The spiral protrusion wraps the electric heating tube.

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