Anti-surge electric heating tube based on gas discharge tube

Abstract

The utility model provides a gas discharge tube-based anti-surge electric heating tube, which comprises a steel tube, a resistance wire, a gas discharge tube and two leads, the resistance wire is arranged in the steel tube with a hollow structure, two ends of the steel tube are provided with ports, two ends of the resistance wire extend to the ports and are connected with the leads, an accommodating space is formed between the resistance wire and the inner side wall of the steel tube, and the gas discharge tube is arranged in the accommodating space. The accommodating space is filled with an insulating filler with good thermal conductivity, two ends of the gas discharge tube are connected between two wires, a third end of the gas discharge tube is grounded, and the two wires are respectively connected with a live wire and a zero wire of an external power supply; high voltage between the positive end and the negative end of the electric heating tube can be removed, so that the electric heating tube is prevented from being damaged by surge.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical equipment technical field, concretely relates to a prevent surge electric heating tube based on gas discharge tube. BACKGROUND

[0002] The existing refrigeration equipment such as refrigerator needs to carry out defrosting, defrosting etc., and defrosting, defrosting generally uses electric heating tube, because the refrigerator itself is the refrigeration equipment, and the defrosting temperature of the refrigerator should not be too high, the existing electric heating tube and temperature sensor are connected in parallel to reach the setting, control temperature effect, and this structure can very good play the role of defrosting, defrosting.

[0003] Such as Chinese patent application No. 201821050954.3, publication date is 2019.01.25 patent literature, it discloses a kind of defrosting electric heating tube suitable for refrigerator pipe, including stainless steel elbow pipe, the positive and negative pole end of stainless steel elbow pipe is provided with elastic electric lead wire, heat-resistant sleeve is arranged on elastic electric lead wire, and the terminal of elastic electric lead wire is arranged on wire harness connector and is electrically connected with wire harness connector, temperature fuse is arranged on the positive and negative pole end of stainless steel elbow pipe, temperature sensor is arranged on the side of stainless steel elbow pipe, the temperature sensor is electrically connected with the wire harness connector, and heat-resistant sleeve is arranged on the electric connection line of temperature sensor.

[0004] The above-mentioned document is through the temperature fuse of the positive and negative pole end of stainless steel elbow pipe, when the temperature of electric heating tube is too high, can disconnect, thereby playing the role of protection;But in the positive and negative two ends of electric heating tube with curved shape, due to long-term high pressure state, it is easy to form surge and cause damage to electric heating tube, surge refers to the peak value that exceeds stable value in instant, including the phenomenon of surge voltage and surge current, but when forming surge initially, electric heating tube does not produce temperature rise instantaneously, so that simple temperature detection cannot realize accurate detection, so that electric heating tube may have electric leakage safety hazard. SUMMARY

[0005] The utility model discloses a kind of prevent surge electric heating tube based on gas discharge tube, can remove the high voltage between the positive and negative two ends of electric heating tube, to avoid forming surge and causing damage to electric heating tube.

[0006] In order to achieve the above object, the utility model provides a kind of based on gas discharge tube's anti-inrush surge electric heating tube, including steel pipe, resistance wire, gas discharge tube and two wires, the resistance wire is arranged in the steel pipe of hollow structure, the both ends of steel pipe are equipped with port, the both ends of resistance wire extend to port and are connected with wire, and the accommodation space is formed between resistance wire and steel pipe inner wall, the accommodation space is filled with the filler of good heat conductivity and insulation, the both ends of gas discharge tube are connected between two wires, the third end of gas discharge tube is grounded, and the firewire and zero line of external power supply are connected with two wires respectively.

[0007] The above arrangement, by setting filler between steel pipe and resistance wire, facilitate the heat generated by resistance wire to be transmitted to steel pipe through filler after resistance wire is powered on, and then the electric heating tube generates heat, which plays a role of defrosting for refrigerator;Because electric heating tube is powered on for a long time, such long-term high voltage can appear between wires, thereby affecting the entire electric heating tube and causing damage, and connecting gas discharge tube between wires, because the third end of gas discharge tube is grounded, the working principle of gas discharge tube is that when a certain voltage is applied between two poles of discharge tube, uneven electric field is generated between poles, under the action of this electric field, gas in the tube begins to ionize, when the applied voltage increases to make the field strength between poles exceed the insulation strength of gas, the gap between two poles will be discharged and broken down, and the voltage between two poles of discharge tube after conduction is maintained at the residual voltage level determined by discharge arc, which is generally very low, so that electronic equipment connected in parallel with discharge tube is protected from overvoltage damage, so that high voltage formed between wires can be released through gas discharge tube, to prevent high voltage from forming surge between two wires, thereby damaging the entire electric heating tube, so as to achieve the effect of protecting electric heating tube.

[0008] Further, after the filler fills the accommodation space, the port is sealed with insulating material.

[0009] The above arrangement facilitates the fixation of resistance wire in steel pipe and the connection with wire.

[0010] Further, the both ends of resistance wire extend to port and are connected with wire through lead rod.

[0011] The above arrangement facilitates the electrical connection between resistance wire and wire through lead rod.

[0012] Further, the resistance wire forms extension at the port of steel pipe and is connected with one end of lead rod, and the other end of lead rod is connected with wire.

[0013] The above arrangement facilitates the connection of resistance wire and wire through lead rod.

[0014] Further, a sealing area one is formed on four sides of the end of the steel pipe, the extension of the resistance wire, the lead rod and the end of the wire, and the sealing area one is filled with insulating material.

[0015] The above arrangement prevents leakage at the connection of the resistance wire, the lead rod and the wire, and affects the normal operation of the electric heating pipe.

[0016] Further, the filler is solid granular magnesium oxide.

[0017] The above arrangement can have good thermal conductivity while avoiding conduction, and further transfers the heat of the resistance wire to the steel pipe.

[0018] Further, a sealing area two is formed on four sides of the gas discharge pipe and the connection of the gas discharge pipe and the wire, and the sealing area two is filled with insulating material.

[0019] The above arrangement avoids the contact of the gas discharge pipe with the outside, better connects the wire, releases the high voltage formed between the wires, and prevents the formation of surges from damaging the whole electric heating pipe.

[0020] Further, the steel pipe is a U-shaped steel pipe, and the wire includes a first wire and a second wire.

[0021] The above arrangement facilitates the connection of the electric heating pipe and the installation in the refrigerator. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is a structural connection diagram of the utility model.

[0023] Fig. 2 It is a three-dimensional structural diagram of the utility model. DETAILED DESCRIPTION

[0024] The utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0025] As Figs. 1-2As shown, a gas discharge tube based anti-surge electric heating tube is applied to defrosting of a refrigerator, comprising a steel tube 1, a resistance wire 2, a gas discharge tube 3 and two wires, the wires comprising a first wire 11 and a second wire 12, the resistance wire 2 is arranged in the hollow steel tube 1, a containing space 4 is formed between the resistance wire 2 and the inner wall of the steel tube 1, the containing space 4 is filled with a filler (not shown in the figure) which is insulating and has good heat conductivity, the filler is solid granular magnesium oxide, the two ends of the steel tube 1 are provided with ports, after the containing space 4 is filled with the filler, the resistance wire 2 can conduct electricity while having good heat conductivity, and the heat generated by the resistance wire 2 after being electrified can be transmitted to the steel tube 1, the ports are treated by pouring sealing with insulating material, the resistance wire 2 is fixed in the steel tube 1 by pouring sealing, thereby facilitating connection with the wires. The two ends of the resistance wire 2 extend to the ports of the steel tube 1 to form extension parts 5, the resistance wire 2 is connected with the wires through lead rods, in the embodiment, the number of the lead rods is two, the extension part 5 at one end of the resistance wire 2 is connected with one end of one lead rod 21, the other end of the lead rod 21 is connected with one end of the first wire 11, the other end of the first wire 11 is connected with a live wire (not shown in the figure), the extension part 5 at the other end of the resistance wire 2 is connected with one end of the other lead rod 22, the other end of the other lead rod 22 is connected with one end of the second wire 12, the other end of the second wire 12 is connected with a neutral wire (not shown in the figure), after the resistance wire 2 is connected with the wires through the lead rods, a sealing area one 31 is formed on the four sides of the end of the steel tube 1, the extension part 5 of the resistance wire 2, the lead rods and the ends of the wires, the sealing area one 31 is treated by pouring sealing with insulating material, thereby preventing leakage at the connection between the resistance wire 1, the lead rods and the wires from affecting the normal work of the electric heating tube.

[0026] The two ends of the gas discharge tube 3 are connected between the first wire 11 and the second wire 12, the third end of the gas discharge tube 3 is grounded, a sealing area two 32 is formed on the four sides of the gas discharge tube 3 and the connection between the gas discharge tube 3 and the wires, the sealing area two 32 is treated by pouring sealing with insulating material, avoiding the gas discharge tube 3 from contacting with an external power supply, better connecting with the wires, releasing the high voltage formed between the wires, thereby preventing the formation of surge from damaging the whole electric heating tube. In the embodiment, the insulating material is resin, the gas discharge tube 3 is a ceramic gas discharge tube, the working principle of the gas discharge tube is that when a certain voltage is applied between the two poles of the discharge tube, a non-uniform electric field is generated between the poles, under the action of the electric field, the gas in the tube begins to ionize, when the external voltage increases to make the field strength between the poles exceed the insulation strength of the gas, the gap between the two poles will be discharged and broken down, changing from an insulating state to a conductive state, the voltage between the two poles of the discharge tube is maintained at a residual voltage level determined by the discharge arc after conduction, which is generally very low, thereby preventing the electronic equipment connected in parallel with the discharge tube from being damaged by overvoltage.

[0027] The utility model discloses working principle: after connecting two wires with fire line and zero line respectively, resistance wire 2 generates heat and passes through filler to transfer heat to steel pipe 1, in the long-term energized process, release the high voltage formed between two wires through gas discharge tube 3, prevent the surge between two wires of high voltage, and then damage the whole electric heating tube, thereby reach the effect of protecting electric heating tube.

Claims

1. A gas discharge tube based surge protection electric heating tube comprising a steel tube, an electric resistance wire, a gas discharge tube and two wires, characterized in that: The resistance wire is arranged in the steel pipe of the hollow structure, the both ends of the steel pipe are provided with ports, the both ends of the resistance wire extend to the ports and are connected with wires, a containing space is formed between the resistance wire and the inner side wall of the steel pipe, the containing space is filled with a filler which is insulating and has good heat conductivity, the both ends of the gas discharge tube are connected between two wires, the third end of the gas discharge tube is grounded, and the two wires are connected with the live wire and the zero line of an external power supply respectively.

2. An anti-inrush electrothermal tube based on a gas discharge tube according to claim 1, characterized in that: The both ends of the resistance wire extend to the ports and are connected with the wires through lead rods.

3. An anti-inrush electrothermal tube based on a gas discharge tube according to claim 1, characterized in that: After the containing space is filled with the filler, the ports are filled with insulating material.

4. An anti-inrush electrothermal tube based on a gas discharge tube according to claim 1, characterized in that: The resistance wire forms an extension at the ports of the steel pipe and is connected with one end of a lead rod, and the other end of the lead rod is connected with the wires.

5. An anti-inrush electrothermal tube based on a gas discharge tube according to claim 1, characterized in that: Sealing areas one are formed on the four sides of the end of the steel pipe, the extension of the resistance wire, the lead rod and the end of the wires, and the sealing areas one are filled with insulating material.

6. An anti-inrush electrothermal tube based on a gas discharge tube according to claim 1, characterized in that: The filler is solid magnesium oxide.

7. An anti-inrush electrothermal tube based on a gas discharge tube according to claim 1, characterized in that: Sealing areas two are formed on the four sides of the gas discharge tube and the connection between the gas discharge tube and the wires, and the sealing areas two are filled with insulating material.

8. An anti-inrush electrothermal tube based on a gas discharge tube according to claim 1, characterized in that: The steel pipe is a U-shaped steel pipe, and the wires include a first wire and a second wire.

Images