Segmented heating electric heating tube heater

Abstract

The invention belongs to the technical field of refrigerator defrosting, and particularly relates to a segmented heating electric heating tube heater which comprises an electric heating tube and a connector used for being connected with an electrical control module in refrigeration equipment, the connector is connected to a wiring end of the electric heating tube, a plurality of heating wires with different wire diameters are arranged in the electric heating tube, and the heating wires are connected with the connector. The heating wires are sequentially connected in series; the electric heating pipe extends between evaporator pipelines in the refrigeration equipment, and when the electric heating pipe is started, the electric heating pipe conducts differential temperature heating on different positions of the evaporator pipelines at the same time. According to the invention, the electric heating wires with different wire diameters and different arrangement positions are connected in series in the single electric heating pipe, so that integrated multi-section heating with different powers is realized, and therefore, simultaneous and targeted defrosting is carried out on different degrees of frosting positions on an evaporator in the refrigeration equipment, and the defrosting efficiency is improved while accurate defrosting is realized; in addition, due to the high integration, the structure is simple, the failure rate is lower, and the occupied space is small.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerator defrosting, and in particular relates to an electric heating tube heater with segmented heating. Background Art

[0002] At present, evaporators are required in refrigeration equipment for cooling. For example, when a refrigerator is running, frost is easily condensed on the surface of the evaporator, which will seriously affect the refrigeration efficiency and power consumption of the refrigerator.

[0003] like Figure 3 As shown in the figure, the refrigerant of the evaporator enters the compressor after being transported in the evaporator pipeline. In some variable frequency refrigeration equipment, the compressor will stop running periodically. Due to the equalization of the refrigerant pressure and the low temperature of the evaporator, the refrigerant will flow into the evaporator. Due to gravity, the refrigerant liquid stays in the drain pipe at the bottom of the evaporator, that is, Figure 3 When the compressor is shut down, liquid refrigerant gathers in area 51, so when the compressor is started, these refrigerants evaporate first, causing serious frost on the bottom pipe of the evaporator.

[0004] Traditional defrost heaters often adopt a single power design, that is, the heating value of the internal heating wire is fixed, making it difficult to perform targeted defrosting according to the degree of frost at different positions on the evaporator; in addition, some use more than two heaters in series or parallel to achieve targeted heating and defrosting at different positions.

[0005] However, the above-mentioned traditional defrosting method also has some disadvantages. Connecting multiple heaters through wires requires complex wiring and connection processes, which increases the difficulty of installation and maintenance. Secondly, the wire connections may become potential failure points. Problems such as poor contact and wire aging may cause uneven heating or damage to the heater. For example, the dispersed arrangement of multiple heaters requires a large space, which is not conducive to the compact design of the equipment.

[0006] In view of this, the present invention provides a segmented heating electric heating tube heater to solve the above problems. Summary of the invention

[0007] To achieve the above object, the present invention provides the following technical solution: a segmented heating electric heating tube heater, comprising an electric heating tube and a connector for connecting to an electrical control module in a refrigeration device, wherein the connector is connected to a terminal of the electric heating tube, and a plurality of groups of heating wires with different wire diameters are arranged inside the electric heating tube, and the heating wires are connected in sequence;

[0008] The electric heating tube extends between the evaporator pipelines in the refrigeration equipment. When the electric heating tube is started, the electric heating tube simultaneously performs differential temperature heating on different positions of the evaporator pipelines.

[0009] As a preferred embodiment of the segmented heating electric heating tube heater of the present invention, the electric heating tube further comprises: magnesium oxide powder and a tube body, the heating wire is arranged in the tube body, and the magnesium oxide powder is filled between the heating wire and the tube body to fix the position of the heating wire.

[0010] As a preferred embodiment of the segmented heating electric heating tube heater of the present invention, the tube body is made of stainless steel material or high temperature resistant alloy material.

[0011] As a preferred embodiment of the segmented heating electric heating tube heater of the present invention, the outer wall of the tube body is coated with an anti-corrosion coating.

[0012] As a preferred embodiment of the segmented heating electric heating tube heater of the present invention, the outer wall of the tube body is coated with a thermal conductive coating.

[0013] As a preferred embodiment of the segmented heating electric heating tube heater of the present invention, a temperature fuse is further connected between the connection terminal of the electric heating tube and the connector via a wire.

[0014] As a preferred embodiment of the segmented heating electric heating tube heater of the present invention, a temperature sensor is also connected to the connector for detecting the temperature in the space when the electric heating tube is heating.

[0015] As a preferred segmented heating electric heating tube heater of the present invention, the heating wires are sequentially connected in series via conductive rods.

[0016] As a preferred embodiment of the segmented heating electric heating tube heater of the present invention, the refrigeration equipment is a refrigerator.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention realizes integrated multi-stage heating with different powers by connecting electric heating wires with different wire diameters and arranged in different positions in a single electric heating tube, thereby simultaneously and specifically defrosting different degrees of frosting positions on the evaporator of the refrigeration equipment, thereby achieving precise defrosting and improving the defrosting efficiency; in addition, due to its high degree of integration, its structure is simple, the failure rate is lower, and the space occupancy is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the electric heating tube of the present invention;

[0022] Figure 3 Schematic diagram of the location of frost accumulation on the evaporator.

[0023] In the figure: 1. Electric heating tube; 11. Heating wire; 12. Conductive rod; 13. Magnesium oxide powder; 2. Connector; 3. Temperature fuse; 4. Temperature sensor; 5. Evaporator; 51. Liquid refrigerant accumulation area during shutdown. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention relates to a segmented heating electric heating tube heater, such as Figure 1 As shown, it includes: an electric heating tube 1 and a connector 2 for connecting to an electrical control module in a refrigeration device, the connector 2 is connected to the wiring terminal of the electric heating tube 1, and the operation control of the electric heating tube 1 is realized through the connection between the connector 2 and the electrical control module in the refrigeration device.

[0026] Among them, Figure 2 As shown, the electric heating tube 1 includes: a tube body 14 made of stainless steel or high-temperature resistant alloy material, a plurality of groups of heating wires 11 with different wire diameters connected in series inside the tube body 14 through conductive rods 12, and magnesium oxide powder 13 filled between the heating wires 11 and the tube body 14 for insulating and fixing the heating wires 11.

[0027] Specifically, since the heating wires 11 with different wire diameters have different resistivities and heating powers, the larger the wire diameter of the heating wire 11 of the same material, the greater its resistivity and heating power; when multiple heating wires 11 with different wire diameters are connected in series, different amounts of heat will be generated at their locations.

[0028] Furthermore, the outer wall of the tube body 14 may be coated with an anti-corrosion coating or a thermal conductive coating, which can be selected according to specific application environments and requirements, thereby improving the life and thermal conductivity of the electric heating tube 1.

[0029] Furthermore, in order to improve the safety of the entire heater, a temperature fuse 3 can be connected between the terminal of the electric heating tube 1 and the connector 2 through a wire, and the temperature fuse 3 can play a role in temperature overheating protection. When the circuit, the surface of the component, or the system is over-current or over-temperature, the fuse pops open or burns out to prevent the component from overheating in the event of a fault, thereby avoiding accidents.

[0030] In addition, a temperature sensor 4 can also be connected to the connector 2. The temperature sensor 4 can detect in real time the space temperature when the electric heating tube 1 is running. By setting a temperature threshold in the electrical control module of the refrigeration equipment, when the temperature sensor 4 detects that the temperature exceeds the high temperature threshold, the electrical control system of the refrigeration equipment can control the electric heating tube 1 to shut down, thereby further improving safety.

[0031] Embodiment 1: When in use, taking a refrigerator as an example, the above-mentioned electric heating tube 1 is extended in the refrigeration equipment, that is, between the evaporator 5 pipelines in the refrigerator, and the heating wire 11 with large heating power is close to the position where the evaporator 5 is more frosted, that is, the liquid refrigerant gathering area 51 when the machine is shut down, and the heating wire 11 with small heating power is close to the position where the evaporator 5 is less frosted. By starting the electric heating tube 1, multiple groups of heating wires 11 with different wire diameters in the electric heating tube 1 are heated at the same time to increase the heat in the space where they are located, so as to gradually defrost the evaporator 5.

[0032] At the same time, the heating wire 11 with a low heating rate and the heating wire 11 with a high heating rate can simultaneously defrost different degrees of frost in a targeted manner, thereby effectively improving the defrosting efficiency and achieving energy saving and consumption reduction.

[0033] It should be noted here that the pipeline of the electric heating tube 1 can be bent by a pipe bending machine and can be adaptively produced for different types of evaporators 5. At the same time, in this embodiment, only two groups of heating wires 11 inside the electric heating tube 1 are connected in series, and the specific number can be adaptively adjusted according to the actual target position.

[0034] Embodiment 2: In addition to defrosting the evaporator 5 in the refrigerator, it can also be used for defrosting the evaporator 5 in the air conditioner. Different from the first embodiment, since the interface between the high-pressure side capillary in the air conditioner and the evaporator 5 is at the upper part, the expansion heat absorption occurring at the interface is the strongest, and the coil quickly absorbs heat and flows to the low-pressure side of the compressor, so the top of the evaporator 5 is most likely to frost, and the frost is also the thickest. According to the pipeline design of the evaporator 5 in the air conditioner, the electric heating tube 1 is extended in the evaporator 5 pipeline in the air conditioner, and the tube body 14 of the heating wire 11 with a high heating rate in the electric heating tube 1 is close to the interface between the high-pressure side capillary and the evaporator 5 at the upper part, and the tube body 14 of the heating wire 11 with a lower heating rate is close to other positions with less frost. When the electric heating tube 1 is started, defrosting is performed simultaneously.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A segmented heating electric heating tube heater, comprising an electric heating tube (1) and a connector (2) for connecting to an electrical control module in a refrigeration device, wherein the connector (2) is connected to a terminal of the electric heating tube (1), and is characterized in that: The electric heating tube (1) is provided with a plurality of groups of heating wires (11) with different wire diameters inside, and the heating wires (11) are connected in sequence; The electric heating tube (1) extends between the evaporator (5) pipelines in the refrigeration equipment. When the electric heating tube (1) is started, the electric heating tube (1) simultaneously performs differential temperature heating on different positions of the evaporator (5) pipelines.

2. The electric heating tube heater with segmented heating according to claim 1, characterized in that: The electric heating tube (1) further comprises: magnesium oxide powder (13) and a tube body (14); the heating wire (11) is arranged in the tube body (14); the magnesium oxide powder (13) is filled between the heating wire (11) and the tube body (14) to fix the position of the heating wire (11).

3. The segmented heating electric heating tube heater according to claim 2 is characterized in that: The tube body (14) is made of stainless steel or high-temperature resistant alloy material.

4. The segmented heating electric heating tube heater according to claim 3 is characterized in that: The outer wall of the tube body (14) is coated with anti-corrosion paint.

5. The segmented heating electric heating tube heater according to claim 3 is characterized in that: The outer wall of the tube body (14) is coated with heat-conducting paint.

6. The segmented heating electric heating tube heater according to any one of claims 1 to 5, characterized in that: A temperature fuse (3) is also connected between the connection end of the electric heating tube (1) and the connector (2) via a wire.

7. The segmented heating electric heating tube heater according to claim 6 is characterized in that: The connector (2) is also connected to a temperature sensor (4) for detecting the temperature in the space when the electric heating tube (1) is heating.

8. The segmented heating electric heating tube heater according to claim 1 is characterized in that: The heating wires (11) are connected in series in sequence via conductive rods (12).

9. The segmented heating electric heating tube heater according to claim 1, characterized in that: The refrigeration equipment is a refrigerator.

Images