Heating rod, steam generating device and scrubber

Abstract

The application discloses a heating rod, a steam generating device and a floor cleaning machine, wherein the heating rod comprises a core rod, a thermocouple, a heating wire, and a sleeve; the working end of the thermocouple is fixed in the core rod, and the free end of the thermocouple extends out of the core rod; the heating wire is arranged on the outer periphery of the core rod and is connected with an external power supply through a heating wire wire; the sleeve is sleeved on the core rod and is sealingly connected with both ends of the core rod; and an annular cavity formed between the sleeve and the core rod is filled with an insulating layer. The heating rod, the steam generating device and the floor cleaning machine provided by the application are provided with a slot at the first end of the core rod, and a built-in thermocouple is positioned by being pressed by a plug-in piece, so that the problem that the measured temperature and the actual temperature are deviated due to the non-uniform installation position of the built-in thermocouple is avoided, and the yield of the product is improved.

Description

Technical Field

[0001] This invention relates to the field of home appliances, and particularly to heating rods, steam generators, and floor scrubbers. Background Technology

[0002] The working principle of a steam floor scrubber is to clean with steam, also known as supersaturated steam cleaning. It uses saturated steam under high temperature and pressure to dissolve and vaporize the oil stains on the surface to be cleaned, making the surface ultra-clean. At the same time, supersaturated steam can effectively cut into any tiny holes and cracks, peeling off and removing the stains and residues. Then, by rotating the scrubbing pad, the stains can be cleaned.

[0003] The heating rod is a core component of the steam generating device in a steam floor scrubber. While studying the relationship between the measured temperature of the built-in thermocouple and the actual surface temperature of the heating rod, the inventors discovered that the position of the built-in thermocouple has a significant impact on the measured temperature.

[0004] Currently, to facilitate the installation of U-shaped thermocouples, two temperature sensing holes extending inward along the axis are typically provided at the tail end of the mandrel, and a slot connecting the two temperature sensing holes is provided at the head end of the mandrel. The free end of the thermocouple is then inserted into the two temperature sensing holes from the head end of the mandrel and extends out from the tail end. While this method solves the problem of difficult thermocouple installation, the inability to precisely control the position of the thermocouple's working end inside the mandrel leads to a large deviation between the measured temperature and the actual temperature, affecting the yield rate.

[0005] Therefore, in view of the shortcomings of existing technologies, it is necessary to design heating rods, steam generators and floor scrubbers to solve the above problems. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention aims to provide a heating rod, a steam generating device, and a floor scrubbing machine.

[0007] To achieve the above and other related objectives, the technical solution provided by the present invention is: a heating rod, comprising:

[0008] mandrel;

[0009] A thermocouple, wherein the working end of the thermocouple is fixed in the core rod, and the free end of the thermocouple extends out of the core rod;

[0010] A heating wire, which is wound around the outer periphery of the core rod and connected to an external power source via a heating wire;

[0011] A sleeve is fitted onto the mandrel and sealed to both ends of the mandrel. An insulating layer is filled in the annular cavity formed between the sleeve and the mandrel.

[0012] A preferred technical solution is as follows: the tail end of the core rod is provided with two temperature measuring holes arranged along the axis, and the head end of the core rod is provided with a slot communicating with the two temperature measuring holes, and the slot is provided with a insert.

[0013] The preferred technical solution is as follows: the thermocouple is a K-type thermocouple; the working end of the thermocouple is U-shaped and located in the temperature measuring hole and the slot, and is positioned and fixed by the insert.

[0014] The preferred technical solution is as follows: the insert is made of mica sheet; the insertion end of the insert is an isosceles triangular groove structure with a lower middle and higher sides, and the bottom of the slot and the insertion end of the insert are shaped to fit each other.

[0015] A preferred technical solution is as follows: the core rod is further provided with two heating wire wire holes that run through both ends along the axis, and the heating wire wires are inserted into the heating wire wire holes; the heating wires are spirally wound around the outer periphery of the core rod, and the two ends of the heating wires are respectively inserted into the two heating wire wire holes and electrically connected to the heating wire wires.

[0016] A preferred technical solution is as follows: the top end of the core rod is provided with a top support, and the bottom end of the core rod is provided with a bottom support; the top support and the bottom support have the same structure and are both cylindrical structures; the outer diameter of the top support and the bottom support are matched with the inner diameter of the sleeve; the bottom end of the top support is provided with two countersunk holes corresponding to the heating wire wire holes; and the bottom support is provided with two through holes arranged along the axis for the heating wire wire to pass through.

[0017] The preferred technical solution is that the core rod, the bottom support and the top support are all made of magnesium oxide, and the insulating layer is made of magnesium oxide powder.

[0018] The preferred technical solution is as follows: the first and last ends of the sleeve are respectively sealed and connected to the top support and the bottom support, and a flange is fixedly provided at the last end of the sleeve; both the sleeve and the flange are made of stainless steel.

[0019] A steam generating device includes a housing and a heating rod as described above. The housing is a sealed barrel-shaped structure, and the heating rod is coaxially arranged in the housing. The housing is provided with a water inlet and a steam inlet communicating with the interior of the housing.

[0020] A floor scrubber includes a steam generator as described above.

[0021] Due to the application of the above technical solution, the beneficial effects of this invention are as follows:

[0022] The heating rod, steam generator, and floor scrubber provided by this invention have a slot at the head end of the core rod, and then a plug is used to press and position the built-in thermocouple to avoid the problem of deviation between the measured temperature and the actual temperature caused by inconsistent installation position of the built-in thermocouple. This structure improves the product yield. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the heating rod structure of the present invention.

[0024] Figure 2 This is an exploded view of the heating rod of the present invention.

[0025] Figure 3 This is a schematic diagram of the mandrel structure of the present invention.

[0026] Figure 4 This is a first-view cross-sectional view of the mandrel of the present invention.

[0027] Figure 5 This is a second-view cross-sectional view of the mandrel of the present invention.

[0028] Figure 6 This is a cross-sectional view of the steam generator of the present invention.

[0029] In the above attached diagrams, 1 is the core rod; 101 is the temperature measuring hole; 102 is the slot; 103 is the heating wire lead hole; 104 is the clearance opening; 2 is the thermocouple; 3 is the heating wire; 4 is the heating wire lead; 5 is the sleeve; 6 is the insulation layer; 7 is the insert; 8 is the top bracket; 9 is the bottom bracket; 10 is the flange; 11 is the housing; 1101 is the water inlet connector; and 1102 is the steam connector. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0031] Please see Figures 1-6It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example:

[0034] like Figures 1-5 As shown, a heating rod according to the present invention includes:

[0035] The core rod 1 has two inwardly oriented temperature measuring holes 101 arranged symmetrically along the axial direction at its tail end. The core rod 1 has an inwardly oriented slot 102 at the center of its head end, which is connected to the two temperature measuring holes 101.

[0036] Thermocouple 2 is a U-shaped K-type thermocouple. The working end of thermocouple 2 is fixed in the core rod 1, and the free end of thermocouple 2 extends out of the core rod 1. During assembly, the free end of thermocouple 2 is inserted into the slot 102 at the beginning of the core rod 1 and extends out of the end of the core rod 1 through the two temperature measuring holes 101. Then, the insert 7 is inserted into the slot 102 to press the bent part of thermocouple 2 to achieve positioning and fixation.

[0037] The heating wire 3 is spirally wound around the outer circumference of the core rod 1 and connected to an external power source via heating wire 4. Specifically, the core rod 1 also has two heating wire hole 103 extending along the axis through both ends. The heating wire 4 is inserted into the heating wire hole 103 (the two heating wire hole 103 and the two temperature measuring holes 101 are orthogonally distributed so that when the insert 7 is inserted into the slot 102, the two heating wires 4 are separated. The insert 7 is made of mica sheet, which has good insulation and high temperature resistance, and can prevent the two heating wires 4 from short-circuiting). The heating wire 3 is spirally wound around the outer circumference of the core rod 1, and its two ends are respectively inserted into the two heating wire hole 103 and electrically connected to the heating wire 4.

[0038] It should be noted that the first end of the core rod 1 is provided with a clearance opening 104 that connects to one of the heating wire wire holes 103, and the last end of the core rod 1 is provided with a clearance opening 104 that connects to the other heating wire wire hole 103. The clearance opening 104 allows both ends of the heating wire 3 to be embedded therein, which can prevent the heating wire 3 from protruding from the end of the core rod 1 and interfering with the assembly of other components.

[0039] The sleeve 5 is fitted onto the core rod 1 and sealed to both ends of the core rod 1 (to prevent water ingress). The annular cavity formed between the sleeve 5 and the core rod 1 is filled with an insulating layer 6, which prevents the heating wire 3 from contacting the sleeve 5.

[0040] Furthermore, the insertion end of the insert 7 is an isosceles triangular groove structure with a lower center and higher sides, and the bottom of the slot 102 matches the shape of the insertion end of the insert 7. Thermocouple 2 is usually constructed by welding two conductors of different materials. When welded into a U-shaped structure, the weld joint is the bend of the U-shape. By adopting the above-mentioned structure of insert 7 and slot 102, the shape of the weld joint of thermocouple 2 is matched, which facilitates compression positioning without damaging thermocouple 2.

[0041] Furthermore, the top of the mandrel 1 is provided with a top support 8, and the bottom of the mandrel 1 is provided with a bottom support 9; the top support 8 and the bottom support 9 have the same structure and are both cylindrical. The outer diameter of the top support 8 and the bottom support 9 matches the inner diameter of the sleeve 5. The bottom of the top support 8 is provided with two countersunk holes corresponding to the heating wire hole 103, and the bottom support 9 is provided with two through holes arranged along the axis and through which the heating wire 4 passes. The top support 8 and the bottom support 9 are used to position the mandrel 1 in the sleeve 5 (specifically, during assembly, the heating wire 4 passes through the through hole in the bottom support 9, the heating wire hole 103, and then into the countersunk hole at the bottom of the top support 8 in sequence, so that the three are positioned), to ensure that the mandrel 1 and the sleeve 5 are arranged coaxially and to ensure uniform heating.

[0042] Furthermore, the core rod 1, bottom support 9, and top support 8 are all made of magnesium oxide, and the insulation layer 6 is made of magnesium oxide powder, all of which have good insulation and high temperature resistance.

[0043] Furthermore, the two ends of the sleeve 5 are respectively sealed to the top support 8 and the bottom support 9, and a flange 10 is fixedly installed at the tail end of the sleeve 5; both the sleeve 5 and the flange 10 are made of stainless steel. The flange 10 is used for fixed installation with the shell 11 in the steam generator.

[0044] like Figure 6 As shown, this application also relates to a steam generating device, including a housing 11 and the aforementioned heating rod. The housing 11 is a sealed barrel-shaped structure, and the heating rod is coaxially arranged in the housing 11. The housing 11 is provided with a water inlet connector 1101 and a steam connector 1102 communicating with the interior of the housing. In use, water enters the housing 11 through the water inlet connector 1101, is heated by the heating rod to generate steam, and then discharged from the steam connector 1102.

[0045] This application also relates to a floor scrubbing machine, including the steam generating device described above.

[0046] In addition, it should be noted that the heating rod in this application can be powered by DC or AC, and the power supply method can be selected according to the actual use requirements.

[0047] Therefore, the present invention has the following advantages:

[0048] The heating rod, steam generator, and floor scrubber provided by this invention have a slot at the head end of the core rod, and then a plug is used to press and position the built-in thermocouple to avoid the problem of deviation between the measured temperature and the actual temperature caused by inconsistent installation position of the built-in thermocouple. This structure improves the product yield.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A heating rod, characterized in that, include: Core rod (1); Thermocouple (2), the working end of the thermocouple (2) is fixed in the core rod (1), and the free end of the thermocouple (2) extends out of the core rod (1); Heating wire (3), the heating wire (3) is wound around the outer periphery of the core rod (1) and connected to an external power source through heating wire (4); A sleeve (5) is fitted onto the core rod (1) and sealed to both ends of the core rod (1). An insulating layer (6) is filled in the annular cavity formed between the sleeve (5) and the core rod (1). The tail end of the core rod (1) is provided with two temperature measuring holes (101) arranged along the axis. The head end of the core rod (1) is provided with a slot (102) that communicates with the two temperature measuring holes. The slot (102) is provided with a insert (7). The insertion end of the insert (7) is an isosceles triangular groove structure with a low middle and high sides. The bottom of the slot (102) and the insertion end of the insert (7) are in shape to match.

2. A heating rod according to claim 1, characterized in that: The thermocouple (2) is a type K thermocouple; the working end of the thermocouple (2) is in a U-shaped structure and is located in the temperature measuring hole (101) and the slot (102) and is fixed by the insertion piece (7) for compression.

3. A heating rod according to claim 1, characterized in that: The core rod (1) is also provided with two heating wire wire holes (103) that run through both ends along the axis. The heating wire wire (4) is inserted into the heating wire wire holes (103). The heating wire (3) is spirally wound around the outer periphery of the core rod (1). The two ends of the heating wire (3) are respectively inserted into the two heating wire wire holes (103) and electrically connected to the heating wire wire (4).

4. A heating rod according to claim 3, characterized in that: The top end of the core rod (1) is provided with a top support (8), and the bottom end of the core rod (1) is provided with a bottom support (9). The top support (8) and the bottom support (9) have the same structure and are both cylindrical structures. The outer diameter of the top support and the bottom support are matched with the inner diameter of the sleeve. The bottom end of the top support is provided with two countersunk holes corresponding to the heating wire hole (103). The bottom support is provided with two through holes arranged along the axis for the heating wire (4) to pass through.

5. A heating rod according to claim 4, characterized in that: The core rod (1), the bottom support (9) and the top support (8) are all made of magnesium oxide, and the insulating layer (6) is made of magnesium oxide powder.

6. A heating rod according to claim 4, characterized in that: The sleeve (5) is sealed to the top support (8) and the bottom support (9) at both ends, and a flange (10) is fixed at the tail end of the sleeve (5); both the sleeve (5) and the flange (10) are made of stainless steel.

7. A steam generating device, comprising a housing (11), characterized in that: It also includes a heating rod as described in any one of claims 1 to 6, wherein the housing (11) is a sealed barrel structure, the heating rod is coaxially arranged in the housing (11), and the housing (11) is provided with a water inlet connector (1101) and a steam connector (1102) communicating with the interior of the housing.

8. A floor scrubbing machine, characterized in that: Includes the steam generating apparatus as described in claim 7.

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