CN220269654U

CN220269654U - Liquid heater

Info

Publication number: CN220269654U
Application number: CN202320077450.5U
Authority: CN
Inventors: 贾建东; 刘呈祥; 李靖辉
Original assignee: Hangzhou Cobetter Filtration Equipment Co Ltd
Current assignee: Hangzhou Cobetter Filtration Equipment Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-12-29
Anticipated expiration: 2033-01-10

Abstract

The utility model discloses a liquid heater, which is provided with a liquid inlet channel and a liquid outlet channel, a power line is arranged in a penetrating way, and the heater comprises: a heating container with an opening end and a heating wire in the inner cavity; a cover member sealingly connected to the open end; one end of the positioning hollow tube is communicated with the liquid inlet channel, and the other end of the positioning hollow tube stretches into the bottom of the heating container to convey liquid; the heating wire positioning plate is provided with a wire penetrating hole and a mounting hole, and the heating wire extends along the axial direction of the positioning hollow tube and penetrates through the wire penetrating hole; the heating wire locating plate is provided with a plurality of auxiliary through holes with at least one aperture. According to the utility model, the liquid in the heating container passes through the auxiliary via hole from bottom to top, so that the flowing resistance is reduced, and the heating wire positioning plate is prevented from moving due to the upward collision of the liquid; the auxiliary via hole can be used for a power line to pass through and be connected with the heating wire; the pore size and the proportion relation are reasonably set, and enough threading holes can be formed.

Description

Liquid heater

Technical Field

The utility model belongs to the technical field of heaters, and particularly relates to a liquid heater.

Background

In the semiconductor manufacturing process, chemicals such as ultrapure (DIW), sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, and fluoric acid (hereinafter, simply referred to as "chemicals") are used as cleaning chemicals, etching chemicals, developing chemicals, and the like. These drugs are heated to a certain temperature for chemical activity for use in semiconductor manufacturing processes. Therefore, in recent years, embedded heaters that are inline with individual processing apparatuses and immediately heat and supply chemicals to a desired temperature in each processing apparatus are widely used.

In the prior art, the patent number is CN212457380U named as 'a teflon heater', and referring to the documents 1, 2 and 6, the heater discloses a main body made of teflon material and a positioning rod made of teflon material arranged in the main body, wherein the main body is provided with a water inlet and a water outlet; the positioning rod comprises an inner runner communicated with the water inlet and an outer runner arranged in the main body, the outer runner is communicated with the inner runner and the water outlet, and the heater also comprises a heating wire which is arranged in the outer runner and is coated with a teflon film. The heater also comprises at least 2 heating wire locating plates which are sleeved on the locating rod along the axial direction of the locating rod at intervals. When the water heater is in use, water to be heated enters the main body from the water inlet, contacts with the heating wire and flows out from the water outlet, and the water is heated by the heating wire to raise the temperature.

In the prior art, the liquid to be heated gradually moves from bottom to top on the outer side of the positioning rod after coming out of the bottom of the positioning rod, and in the process of upward movement of the liquid, the liquid to be heated only can pass through the mounting hole and the heating wire in the mounting hole to go upwards, because the liquid is blocked by the solid part of the heating wire positioning plate, which is not provided with the mounting hole, and the liquid still can only pass through the mounting hole to go upwards. In this way, on one hand, the liquid moving upwards can strike the solid part of the heating wire locating plate, which is not provided with the mounting hole, so that the heating wire locating plate moves upwards slightly for a certain distance, and the space distribution among the heating wire locating plates is not uniform enough, thereby influencing the heating effect of the heating wires; on the other hand, the upward movement efficiency of the liquid is affected, so that the liquid outlet rate after the liquid is heated is reduced.

The water inlet in the top cover in the prior art extends to the central position of the bottom surface of the top cover from the side wall of the top cover, so that the locating rod is communicated with the water inlet and is arranged at the central position of the top cover, the middle part of the locating plate is provided with a circular through hole with the size matched with the third external thread part of the locating pipe, and the heating wire locating plate is arranged in the main body in the central mode, so that the circular through hole is arranged at the central position of the locating plate. However, in the practical improvement scheme, a plurality of holes are needed to be formed in the top cover for other purposes, for example, three red, three black and six wires are needed to be electrically connected with the heating wire by using a three-phase power wire, so that six holes in the top cover are needed to be used, in addition, holes are needed to be utilized when an upstream exhaust port, a downstream exhaust port, a temperature sensing port and the like are arranged, the holes used have a certain pore diameter, if the top cover is arranged at the central position in the prior art, the surface of the top cover cannot be fully utilized, or the top cover is required to be retracted, and in order to be provided with the holes, the pore diameters of the water inlet and the water outlet can only be reduced, so that the efficiency of liquid inlet and outlet of the heater can be influenced.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the liquid heater, wherein the heating wire positioning plate is provided with the auxiliary through holes which reasonably and effectively utilize the surface of the heating wire positioning plate, so that liquid can flow quickly through the auxiliary through holes, the force of the upward flowing liquid impacting the heating wire positioning plate is reduced, a good heating effect is ensured, and the auxiliary through holes are also convenient for a cable to pass through.

The technical scheme adopted for solving the technical problems is as follows: a liquid heater, the heater being formed with a liquid inlet passage and a liquid outlet passage, and being provided with a power cord, the heater comprising:

the heating container is provided with an opening end, a heating wire electrically connected with the power line is arranged in the inner cavity, and a continuous fluorine resin layer is coated on the outer side of the heating wire;

a cover member hermetically connected to an open end of the heating container;

one end of the positioning hollow tube is communicated with the liquid inlet channel, and the other end of the positioning hollow tube stretches into the bottom of the inner cavity of the heating container so as to convey liquid to the inner cavity of the heating container;

the heating wire positioning plate is provided with a wire penetrating hole and a mounting hole for the positioning hollow tube to penetrate through, and the heating wire extends along the axial direction of the positioning hollow tube and penetrates through the wire penetrating hole;

the heating wire positioning plate is provided with a plurality of auxiliary through holes with at least one aperture;

the diameter of the auxiliary via hole is D1, the diameter of the threading hole is D2, and the diameter of the mounting hole is D3, so that D1 is more than or equal to 1/3D2 and less than or equal to 2/3D2,1/5D3 and D2 is more than or equal to 2/5D3.

According to the liquid heater provided by the utility model, the auxiliary through holes are formed in the heating wire positioning plate, so that when liquid in the heating container flows from bottom to top, the liquid can flow through the adjacent heating wires from the auxiliary through holes to heat the liquid without flowing through the wire through holes to heat the liquid, the resistance of the upward flowing of the liquid is reduced, the liquid outlet rate after the upward flowing of the liquid is heated is high, the force of impacting the heating wire positioning plate in the upward flowing process of the liquid can be further reduced, the upward movement of the heating wire positioning plate caused by the upward collision of the liquid on the solid part of the heating wire positioning plate, which is not perforated, is avoided as much as possible, the uniform interval distribution among the heating wire positioning plates is ensured, and the good heating effect of the heating wires on the liquid is ensured; on the other hand, the auxiliary through holes can be used for connecting the power wires with the required positions of the heating wires on the axial height of the heating container, and can also be used for other cables to pass through or cable analogues to be positioned at the required positions on the axial height of the heating container; in addition, the hole diameters of the auxiliary through holes, the wire penetrating holes and the mounting holes and the size proportion relation between the auxiliary through holes, the wire penetrating holes and the mounting holes are reasonably arranged, on the basis of fully utilizing the surface area of the heating wire locating plate, enough wire penetrating holes can be formed in the heating wire locating plate, waste of the heating wire locating plate is reduced, the enough wire penetrating holes can accommodate and penetrate through heating wires of more quantity as much as possible, more heating wires are uniformly distributed after being wound, and liquid can be heated more effectively.

Further, a plurality of through holes are longitudinally formed in the cover part, the liquid inlet channel and the liquid outlet channel are formed in the cover part and all extend to the side wall of the cover part from the lower surface of the cover part, the liquid inlet channel and the liquid outlet channel are eccentrically arranged, and the mounting holes on the heating wire positioning plate are eccentrically arranged and are equal to the eccentric distance of the liquid inlet channel.

The liquid inlet channel and the liquid outlet channel are eccentrically arranged, so that the surface of the cover part can be effectively utilized, and the eccentric distances of the liquid outlet channel and the liquid inlet channel are reasonably arranged, so that the liquid inlet channel and the liquid outlet channel are arranged at proper positions on the surface of the cover part, and after the liquid outlet channel and the liquid inlet channel are arranged, the cover part has enough surfaces to reasonably open other through holes with certain sizes, and the surface of the cover part and the distribution of the holes and the channels on the surface of the cover part are relatively reasonable; the eccentricity of the mounting hole relative to the heating wire locating plate is equal to the eccentricity of the liquid inlet channel relative to the cover part, the mounting hole and the liquid inlet channel are arranged right up and down after the heating wire locating plate is assembled, the heating wire locating plate is correspondingly matched in the inner cavity of the heating container, and therefore the space in the inner cavity of the heating container is reasonably utilized.

Further, the heating wire positioning plate is provided with a first virtual circle, a second virtual circle and a third virtual circle which are concentric from inside to outside, a plurality of wire penetrating holes are distributed on at least one virtual circle of the first virtual circle, the second virtual circle and the third virtual circle, and a plurality of auxiliary through holes are distributed on at least one virtual circle of the first virtual circle, the second virtual circle and the third virtual circle.

The arrangement is that the plurality of wire penetrating holes are distributed on at least one virtual circle, so that the plurality of wire penetrating holes are regularly distributed and distributed more dispersedly on the heating wire positioning plate, and the distribution rule of the heating wires in the heating container and the full heating of liquid are ensured; the auxiliary through holes are distributed on at least one virtual circle, so that the auxiliary through holes are distributed on the heating wire locating plate regularly and are distributed more dispersedly, the impact effect on the heating wire locating plate caused by the fact that the auxiliary through holes are excessively concentrated in a certain area to cause liquid to flow from bottom to top is reduced, and insufficient heating caused by the fact that the auxiliary through holes are excessively concentrated in a certain area in a local area to cause liquid to flow too fast is avoided as much as possible. In addition, because auxiliary through holes and wire penetrating holes are reasonably formed in the regular virtual circles, the auxiliary through holes, the wire penetrating holes and the mounting holes are reasonably arranged, the holes are convenient to process, and the strength of the heating wire locating plate is also guaranteed.

Further, the distance between adjacent wire penetrating holes is S1, the distance between the wire penetrating holes adjacent to the mounting holes and the mounting holes is S2, the distance between the wire penetrating holes adjacent to the periphery of the heating wire positioning plate and the periphery of the heating wire positioning plate is S3, and when S1 is more than 1/3D2 or S2 is more than 1/3D2 or S3 is more than 1/3D2, the auxiliary through holes are correspondingly formed in the area where S1 or S2 or S3 is located.

When the area where the S1 or the S2 or the S3 of the heating wire positioning plate is provided with a large space, the conditions for arranging the auxiliary through holes can be met, meanwhile, the areas are easy to be impacted by liquid flow, the auxiliary through holes are arranged in the areas to relieve the upward flowing pressure of the liquid, in addition, the auxiliary through holes, the wire penetrating holes and the mounting holes can be reasonably arranged, and the strength of the heating wire positioning plate is also ensured.

Further, the connecting line of the circle centers of any three auxiliary through holes is triangular, and the center of the triangle falls into the area where the wire through holes are located.

So set up, three supplementary via hole disperses in the periphery of threading hole, can not excessively concentrate in the region between the adjacent threading hole, guarantee that supplementary via hole distributes more dispersedly, avoid regional supplementary via hole excessively concentrate lead to the heating that the fluid flow is too fast to lead to in this region as far as possible, guarantee that liquid can be effectively heated by the heater strip before flowing through supplementary via hole, simultaneously, also can reduce supplementary via hole excessively concentrate in certain region and can form the impact effect to other regions of heater strip locating plate when leading to liquid from bottom to top.

Further, auxiliary through holes on the heating wire positioning plates axially adjacent to each other are arranged right opposite to each other.

So set up, the adjacent heater strip locating plate structure of axial can be the same completely, and the adjacent supplementary via hole of axial is accurate when the installation, and the supplementary via hole of aligning is equivalent to forming the passageway in the axial, and liquid passes the passageway and goes out fast, and the liquid of being convenient for is smooth, fast circulation also is convenient for process and assembly.

Furthermore, at least part of the positioning hollow tube is welded on the cover part in a sealing way and is positioned outside the liquid inlet channel or is inserted in the liquid inlet channel in a sealing way, and a rotation-stopping matched orientation part and a matching part are formed between the heating wire positioning plate and the positioning hollow tube.

So set up, when the location hollow tube is fixed on the lid part through welding or grafting mode and is kept static, the butt joint assembly between orientation portion and the convenient location hollow tube of setting up of cooperation portion and the heater strip locating plate for heater strip locating plate and location hollow tube can't rotate relatively, guarantee that supplementary via hole and wire through hole's upper and lower just face, avoid the heater strip locating plate rotatory drive heater strip distortion to influence the problem of heating effect.

Further, the heating wire is provided with a first end and a second end opposite to the first end, the heating wire is wound on all the heating wire positioning plates, and the power wire can pass through the auxiliary through hole to be electrically connected with the first end and/or the second end of the heating wire.

So set up, the power cord passes supplementary via hole and links to each other with the heater strip for no matter the first end and/or the second end of heater strip are in the axial position of heating container, and the power cord can pass supplementary via hole and carry out the electricity with the first end and/or the second end of heater strip and link to each other, and the power cord need not to walk around the heater strip locating plate and link to each other with the heater strip from its edge, has indirectly shortened the length of power cord, also is convenient for the heater strip carries out random wire winding trend at the heater strip locating plate, and supplementary via hole carries out certain direction and pass in order to assemble in the axial to the power cord, and the structure after the assembly is clean and tidier.

Further, the fluororesin layer extends spirally along the axial direction, the thickness of the fluororesin layer is 0.5-2mm, and the pitch of the fluororesin layer is 3-12mm.

The fluororesin layer can play a good corrosion-resistant role under the thickness, so that the heating wire is effectively prevented from being corroded by the corrosive liquid to be heated; the fluororesin layer extends along the axial spiral, the heating wire is taken to extend in the axial direction with spiral winding mode and enclose the periphery side of establishing at the location hollow tube, and the total length of heating wire can be prolonged to spiral extension's mode, improves the heating effect to liquid, and the fluororesin layer elasticity butt is at the inner wall of wearing the silk hole to guarantee that the heating wire locating plate is formed powerful supporting role to the heating wire in radial direction, can prolong the whole length of heating wire under above-mentioned pitch, also can not produce too big pulling force simultaneously and lead to the pulling force that the heating wire locating plate bore too big.

Further, the lower surface of the cover member is provided with a protection joint corresponding to each through hole, the protection joint comprises a joint body in threaded connection with the through holes and a nut in threaded connection with the joint body, the outer side of the power line is sleeved with a pressing bead, and the nut is in threaded connection with the joint body to press the pressing bead.

So set up, press the cooperation of pearl and nut and be used for compressing tightly the power cord, guarantee the stable assembly between power cord and the lid, avoid the power cord not hard up.

The beneficial effects of the utility model are as follows: on one hand, when the liquid in the heating container flows from bottom to top, the liquid can flow through the adjacent heating wires from the auxiliary through holes to heat, so that the resistance of the upward flowing of the liquid is reduced, the liquid outlet rate after the upward flowing of the liquid is heated is high, the force of impacting the heating wire positioning plate in the upward flowing process of the liquid can be further reduced, the upward movement of the heating wire positioning plate caused by the upward collision of the liquid on the solid part of the heating wire positioning plate, which is not perforated, is avoided as much as possible, the uniform interval distribution among the heating wire positioning plates is ensured, and the good heating effect of the heating wires on the liquid is ensured; on the other hand, the auxiliary through holes can be used for connecting the power wires with the required positions of the heating wires on the axial height of the heating container, and can also be used for other cables to pass through or cable analogues to be positioned at the required positions on the axial height of the heating container; in addition, the pore sizes of the auxiliary through holes, the wire penetrating holes and the mounting holes and the size proportion relation among the auxiliary through holes, the wire penetrating holes and the mounting holes are reasonably arranged, on the basis of fully utilizing the surface area of the heating wire positioning plate, enough wire penetrating holes can be formed in the heating wire positioning plate, waste of the heating wire positioning plate is reduced, and the enough wire penetrating holes can accommodate and penetrate through more heating wires as much as possible, so that more heating wires are uniformly distributed after being wound, and liquid can be heated more effectively; the liquid inlet channel and the liquid outlet channel are eccentrically arranged, so that the surface of the cover part can be effectively utilized, and the eccentric distances of the liquid outlet channel and the liquid inlet channel are reasonably arranged, so that the liquid inlet channel and the liquid outlet channel are arranged at proper positions on the surface of the cover part, and after the liquid outlet channel and the liquid inlet channel are arranged, the cover part has enough surfaces to reasonably open other through holes with certain sizes; the wire penetrating holes are regularly distributed and more dispersed on the heating wire positioning plate, so that the heating wires are ensured to be regularly distributed in the heating container and the liquid is fully heated; the auxiliary through holes are regularly distributed and more distributed on the heating wire positioning plate, so that the impact effect on the heating wire positioning plate when liquid flows from bottom to top due to excessive concentration of the auxiliary through holes in a certain area is reduced, and insufficient heating caused by excessive flow of the liquid in the certain area due to excessive concentration of the auxiliary through holes in a local area is avoided as much as possible; on the premise that the auxiliary via holes, the wire penetrating holes and the mounting holes are reasonably arranged, the strength of the heating wire positioning plate is also ensured.

Drawings

Fig. 1 is a schematic diagram of an internal structure of a liquid heater according to the present utility model.

Fig. 2 is a schematic diagram of an internal structure of the liquid heater according to the present utility model.

Fig. 3 is a partially exploded schematic view of a liquid heater according to the present utility model.

Fig. 4 is a top view of a liquid heater according to the present utility model.

Fig. 5 is a cross-sectional view A-A of fig. 4.

Fig. 6 is a top view of a liquid heater according to the present utility model.

Fig. 7 is a B-B cross-sectional view of fig. 6.

Fig. 8 is an enlarged view of the structure at C in fig. 7.

Fig. 9 is a perspective view of a heater wire positioning plate provided by the utility model.

Fig. 10 is a top view of a heater wire positioning plate according to the present utility model.

Fig. 11 is a top view of a second heater wire positioning plate according to the present utility model.

Fig. 12 is a top view of a heater wire positioning plate according to the present utility model.

Fig. 13 is a partial cross-sectional view of a heating wire provided by the present utility model.

The heating device comprises a 1-heating container, an 11-opening end, a 12-power line, a 13-heating wire, a 131-fluororesin layer, a 132-heating wire first end, a 133-heating wire second end, a 2-cover part, a 23-liquid inlet hole, a 24-through hole, a 25-protection connector, a 251-connector body, a 252-nut, a 26-liquid outlet hole, a 3-positioning hollow pipe, a 31-liquid inlet channel, a 32-wire through hole, a 33-heating wire positioning plate, a 331-mounting hole, a 332-auxiliary through hole, a 36-liquid outlet channel, a 41-first virtual circle, a 42-second virtual circle and a 43-third virtual circle.

Detailed Description

In order to make the present utility model better understood by those skilled in the art, the following description of the technical solutions of the present utility model will be made in detail, but not all embodiments of the present utility model are apparent to some embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As shown in fig. 1 to 8, a liquid heater is formed with a liquid inlet channel 31 and a liquid outlet channel 36, a power cord 12 is provided in the heater in a penetrating manner, the heater includes a heating container 1 having an open end 11, a cover member 2 sealingly connected to the open end 11 of the heating container 1, and a positioning hollow tube 3 for conveying a fluid into the heating container 1. The heating container 1 is made of a fluororesin material including, but not limited to, PFA or PTFE. The inner cavity of the heating container 1 is provided with a heating wire 13 connected with the power line 12, one end of the positioning hollow tube 3 is connected with the liquid inlet channel 31, and the other end extends to the bottom of the inner cavity of the heating container 1. At least one heating wire positioning plate 33 is sleeved on the periphery of the positioning hollow tube 3, a plurality of wire penetrating holes 32 and a mounting hole 331 are formed in the heating wire positioning plate 33, the heating wire 13 extends along the axial direction of the positioning hollow tube 3 and penetrates through the wire penetrating holes 32, and the mounting hole 331 is used for penetrating and mounting the positioning hollow tube 3.

As shown in fig. 9 to 11, the heater wire positioning plate 33 is provided with a plurality of auxiliary vias 332 having at least one aperture, except for the wire passing holes 32 and the mounting holes 331, wherein the at least one aperture refers to the aperture of all the auxiliary vias 332 being the same, or two apertures are provided in the plurality of auxiliary vias 332, the number of auxiliary vias 332 in each aperture is not limited, or three or more apertures are provided in the plurality of auxiliary vias 332, the number of auxiliary vias 332 in each aperture is not limited, and the auxiliary vias 332 in a plurality of apertures are beneficial in that cables or the like with different sizes can pass through. In this embodiment, the hole diameters of the auxiliary vias 332 are all consistent, and the reason why the hole diameters of the auxiliary vias 332 are set to be one type is that, when the heater wire positioning plate 33 is processed and manufactured, the auxiliary vias 332 with multiple hole diameters do not need to be processed, so that the processing difficulty is reduced, and the auxiliary vias 332 with the same hole diameter can also satisfy that the power supply line 12 passes through the auxiliary vias 332 to be connected with the heater wires 13 while the liquid flows from bottom to top, or satisfy that other cables or cable analogues are positioned at the desired positions on the axial height of the heating container 1.

As shown in FIG. 9, the diameter of the auxiliary via 332 is defined as D1, the diameter of the threading hole 32 is defined as D2, and the diameter of the mounting hole 331 is defined as D3, then 1/3D 2. Ltoreq.D1.ltoreq.2/3D2,1/5D 3. Ltoreq.D2.ltoreq.2/5D 3. Wherein d1=1/2D 2 is preferred, d2=8/25D 3 is preferred, more specific values may be, for example, d1=8 mm, d2=16 mm, d3=50 mm. The auxiliary through holes 332, the wire penetrating holes 32 and the mounting holes 331 are reasonably arranged, and the size proportion relation among the auxiliary through holes 332, the wire penetrating holes 32 and the mounting holes 331 is reasonably arranged, so that on the basis of fully utilizing the surface area of the heating wire positioning plate 33, enough wire penetrating holes 32 can be formed in the heating wire positioning plate 33, the waste of the heating wire positioning plate 33 is reduced, and the enough wire penetrating holes 32 can accommodate and penetrate more heating wires 13 as much as possible, so that more heating wires 13 are uniformly distributed after being wound, and liquid can be heated more effectively.

Regarding the reasonable distribution of the wire holes 32 and the auxiliary vias 332, more specifically, in the first embodiment, as shown in fig. 10, the heater wire positioning plate 33 is divided from inside to outside into a first virtual circle 41, a second virtual circle 42, and a third virtual circle 43 that are concentrically arranged, the plurality of wire holes 32 are distributed on at least one virtual circle of the first virtual circle 41, the second virtual circle 42, and the third virtual circle 43, and the plurality of auxiliary vias 332 are distributed on at least one virtual circle of the first virtual circle 41, the second virtual circle 42, and the third virtual circle 43. The positions among the first virtual circle 41, the second virtual circle 42 and the third virtual circle 43 are reasonably arranged, for example, the diameter of the first virtual circle 41 is 1/3 of the diameter of the heating wire positioning plate 33, the diameter of the second virtual circle 42 is 1.5-2 times of the diameter of the first virtual circle 41, and the diameter of the third virtual circle 43 is 2.2-2.5 times of the diameter of the first virtual circle 41.

In an alternative embodiment, the plurality of wire-passing holes 32 are distributed on three virtual circles, the plurality of auxiliary vias 332 are distributed only on the second virtual circle 42 and the third virtual circle 43, the auxiliary vias 332, the wire-passing holes 32 and the mounting holes 331 are reasonably arranged, so that the holes can be machined quickly during machining, and the strength of the heating wire positioning plate 33 is ensured.

More specifically, in the second embodiment, as shown in fig. 11, the spacing between adjacent wire holes 32 is defined as S1, the spacing between the wire holes 32 adjacent to the mounting hole 331 and the mounting hole 331 is defined as S2, the spacing between the wire holes 32 adjacent to the periphery of the heating wire positioning plate 33 and the periphery of the heating wire positioning plate 33 is defined as S3, and when S1 is greater than 1/3D2, the auxiliary via holes 332 are correspondingly formed in the area where S1 is located; or when S2 is greater than 1/3D2, the auxiliary via 332 is correspondingly arranged in the area where S2 is located, or when S3 is greater than 1/3D2, the auxiliary via 332 is correspondingly arranged in the area where S3 is located. Wherein S1 refers to the effective length obtained by subtracting the respective radii of the two adjacent wire holes 32 from the connecting line length between the circle centers of the adjacent wire holes 32, S2 refers to the effective length obtained by subtracting the respective radii of the wire holes 32 and 331 from the connecting line length between the wire hole 32 adjacent to the mounting hole 331 and the circle center of the mounting hole 331, and S3 refers to the effective length obtained by subtracting the radius of the wire hole 32 from the perpendicular line passing through the circle center of the wire hole 32 adjacent to the periphery of the heating wire positioning plate 33 and making the periphery of the heating wire positioning plate 33.

In an alternative embodiment, d1=6mm, d2=18mm, i.e. S1 or S2 or S3 > 6mm, this indicates that when the area where S1 or S2 or S3 of the heater wire positioning plate 33 is located has a larger space, the condition of opening the auxiliary via holes 332 can be satisfied, and at the same time, these areas are also indicated to be easily impacted by the flow of the liquid, the auxiliary via holes 332 are provided in these areas to relieve the upward flow pressure of the liquid, and in addition, the auxiliary via holes 332, the wire through holes 32 and the mounting holes 331 can be reasonably arranged, and the strength of the heater wire positioning plate 33 can be ensured.

More specifically, in the third embodiment, the line connecting the centers of any three auxiliary vias 332 is triangular, and the center of the triangle falls into the region where the wire through hole 32 is located. As shown in fig. 12, the center line of the optional three auxiliary vias 332 is triangular, with the center of the triangle falling at the O-point located within one of the threading holes 32. The center O point of the triangle is referred to herein as the intersection of the midlines of the three sides of the triangle. In other words, the auxiliary vias 332 are distributed on the periphery of the wire through holes 32, and are not excessively concentrated in the area between the adjacent wire through holes 32, so that the distribution of the auxiliary vias 332 is ensured to be more dispersed, insufficient heating caused by excessively rapid fluid flow in the area due to excessively concentrated local area auxiliary vias 332 is avoided as much as possible, the effective heating of the liquid by the heating wire 13 before the liquid flows through the auxiliary vias 332 is ensured, and at the same time, the impact effect of the liquid flowing from bottom to top due to excessively concentrated auxiliary vias 332 on the heating wire positioning plate 33 can be reduced.

The above three embodiments can realize that the auxiliary via holes 332 with proper pore size and quantity are arranged in a reasonable area, ensure the smooth circulation of the liquid up and down, and avoid the displacement caused by the impact of the heating wire positioning plate 33 in the liquid flowing process. At the same time, the auxiliary via holes 332, the wire passing holes 32 and the mounting holes 331 are reasonably arranged, and the strength of the heating wire positioning plate 33 is also ensured. In addition, in order to facilitate smooth and rapid circulation of the liquid, the auxiliary through holes 332 on the heating wire positioning plates 33 of the axially adjacent pairs are opposite to each other, in other words, the structures of the axially adjacent heating wire positioning plates 33 are identical, the axially adjacent auxiliary through holes 332 are aligned during installation, the aligned auxiliary through holes 332 are equivalent to forming channels in the axial direction, the liquid passes through the channels to rapidly discharge the liquid, so that the liquid can smoothly and rapidly circulate, and the processing and the assembly are also facilitated.

Further, the cover member 2 is also made of a fluororesin material including, but not limited to, PFA or PTFE. The cover member 2 is longitudinally provided with a plurality of through holes 24, the liquid inlet channel 31 and the liquid outlet channel 36 are both provided on the cover member 2, and the liquid inlet channel 31 and the liquid outlet channel 36 extend from the lower surface of the cover member 2 to the side wall of the cover member 2. The liquid inlet channel 31 is eccentrically arranged on the cover part 2, the liquid outlet channel 36 is located beside the liquid inlet channel 31, the liquid outlet channel 36 is eccentrically arranged on the cover part 2, the surface of the cover part 2 can be effectively utilized by the arrangement, the eccentric distance between the liquid outlet channel 36 and the liquid inlet channel 31 can be reasonably set, and accordingly the liquid outlet channel 36 and the liquid inlet channel 31 are arranged at proper positions on the surface of the cover part 2, a certain area is reserved for holes with certain sizes which need to be formed subsequently after the liquid outlet channel 36 and the liquid inlet channel 31 are arranged, and the surface of the cover part 2 and the distribution of the holes and the channels on the surface of the cover part can be fully utilized.

The outer wall of the cover part 2 is provided with a liquid inlet hole 23 and a liquid outlet hole 26, one end of a liquid inlet channel 31 is communicated with the liquid inlet hole 23, and one end of a liquid outlet channel 36 is communicated with the liquid outlet hole 26, wherein the liquid inlet hole 23 and the liquid outlet hole 26 can be oppositely arranged, or the central extension line of the liquid inlet hole 23 and the central extension line of the liquid outlet hole 26 are intersected at 90 degrees.

On the premise that the liquid inlet channel 31 is eccentrically arranged on the cover part 2, the mounting hole 331 of the heating wire positioning plate 33 for the positioning hollow tube 3 to pass through is also eccentrically arranged, and the mounting hole is equal to the eccentric distance of the liquid inlet channel 31. The fact that the eccentricity of the mounting hole 331 relative to the heating wire positioning plate 33 is equal to the eccentricity of the liquid inlet channel 31 relative to the cover member 2 means that the mounting hole 331 and the liquid inlet channel 31 are arranged right up and down after assembly is completed, the surface of the cover member 2 can be fully utilized, and meanwhile, the space inside the heating container 1 is reasonably utilized by the heating wire positioning plate 33.

The positioning hollow tube 3 is detachably connected to the liquid inlet channel 31, and the central hole of the positioning hollow tube 3 is communicated with the liquid inlet channel 31 and vertically opposite to each other. The detachable connection mode of the positioning hollow tube 3 can be that an internal thread section is arranged at the position, close to the lower surface of the cover part 2, of the inner wall of the liquid inlet channel 31, an external thread ring is arranged at the end part of the positioning hollow tube 3, and the external thread ring is in threaded connection with the internal thread section in a matched mode, so that the positioning hollow tube 3 is convenient to detach and replace. The positioning hollow tube 3 can also be integrally arranged or welded on the cover part 2, so that leakage of liquid to be heated from the joint of the positioning hollow tube 3 and the liquid inlet channel 31 is reduced. More specifically, at least part of the positioning hollow tube 3 is seal-welded to the cover member 2 and located outside the liquid inlet passage 31 or is seal-interposed in the liquid inlet passage 31.

In order to facilitate the assembly between the positioning hollow tube 3 and the heating wire positioning plate 33, the heating wire positioning plate 33 and the positioning hollow tube 3 are prevented from rotating relatively in the circumferential direction, the vertical alignment of the auxiliary through holes 332 and the wire penetrating holes 32 is ensured, the heating wires 13 are prevented from being twisted, and a rotation-stopping matched orientation part and a rotation-stopping matched part are formed between the heating wire positioning plate 33 and the positioning hollow tube 3. The orientation part may be a groove located on the outer wall of the positioning hollow tube 3, the matching part may be a protrusion located on the inner wall of the heating wire positioning plate 33, the groove may be a closed groove or an open groove, and when the orientation part is a closed groove, the elastic protrusion is clamped in the groove to limit the rotation of the heating wire positioning plate 33 in the circumferential direction; in the case of an open groove, which communicates from the top end to the bottom end of the positioning hollow tube 3, the protrusion may slide in or out from the top end or the bottom end of the positioning hollow tube 3, and the protrusion may be positioned in the groove to restrict rotation of the heating wire positioning plate 33 in the circumferential direction. Of course, the orientation portion may be a protrusion located on the outer wall of the positioning hollow tube 3, and the mating portion may be a groove located on the inner wall of the heating wire positioning plate 33, which is not limited in particular.

The heating wire 13 has a first end 132 and a second end 133 opposite to the first end 132, the heating wire 13 is wound around all the heating wire positioning plates 33, the power wire 12 may be electrically connected to the first end 132 of the heating wire 13 through the auxiliary via 332, or the power wire 12 may be electrically connected to the second end 133 of the heating wire 13 through the auxiliary via 332, or the power wire 12 may be electrically connected to the first end 132 and the second end 133 of the heating wire 13 through the auxiliary via 332, respectively. Therefore, no matter where the first end 132 and/or the second end 133 of the heating wire 13 is finally positioned in the axial direction of the heating container 1, the power wire 12 can be electrically connected with the first end 132 and/or the second end 133 of the heating wire 13 through the auxiliary via hole 332, the power wire 12 does not need to bypass the heating wire positioning plate 33 and is connected with the heating wire 13 from the edge thereof, the length of the power wire 12 is indirectly shortened, the heating wire 13 is also conveniently and randomly wound on the heating wire positioning plate 33, the auxiliary via hole 332 guides and passes the power wire 12 to a certain extent in the axial direction so as to facilitate assembly, and the assembled structure is tidier and orderly.

As shown in fig. 13, the heating wire 13 is coated with a continuous fluororesin layer 131 on the outside, the fluororesin layer 131 is spirally extended in the axial direction, and the thickness of the fluororesin layer 131 is 0.5 to 2mm, where the thickness of the fluororesin layer 131 means a single-sided width between the inner edge and the outer edge thereof, that is, the thickness L of the fluororesin layer 131 is in the range of 0.5 to 2mm in fig. 13, and the pitch of the fluororesin layer 131 is 3 to 12mm, that is, the pitch H of the fluororesin layer 131 is in the range of 3 to 12mm in fig. 8. Under the corrosion-resistant action of the fluororesin layer 131, the heating wire 13 can be effectively prevented from being corroded by the corrosive liquid to be heated. The heating wire 13 and the fluororesin layer 131 extend in the axial direction in a spiral winding manner and are arranged on the outer circumferential side of the positioning hollow tube 3 in a surrounding manner, the total length of the heating wire 13 can be prolonged in a spiral extending manner, the heating effect on liquid is improved, the fluororesin layer 131 is elastically abutted against the inner wall of the wire penetrating hole 32, and therefore the powerful supporting effect of the heating wire positioning plate 33 on the heating wire 13 in the radial direction is ensured.

The lower surface of the cover member 2 is provided with a protection joint 25 corresponding to each through hole 24, the protection joint 25 comprises a joint body 251 screwed on the through holes 24, and a nut 252 screwed on the joint body 251, the outer side of the power line 12 is sleeved with a pressing bead, and the nut 252 is connected on the joint body 251 for pressing the pressing bead. The pressing bead and the nut 252 are matched to press the power line 12 tightly, so that stable assembly between the power line 12 and the cover part 2 is ensured, and the loosening of the power line 12 is avoided.

The foregoing detailed description is provided to illustrate the present utility model and not to limit the utility model, and any modifications and changes made to the present utility model within the spirit of the present utility model and the scope of the appended claims fall within the scope of the present utility model.

Claims

1. A liquid heater, the heater being formed with a liquid inlet passage and a liquid outlet passage, and being provided with a power cord, the heater comprising:

a cover member hermetically connected to an open end of the heating container;

the heating wire positioning plate is provided with a wire penetrating hole and a mounting hole for the positioning hollow tube to penetrate through, and the heating wire extends along the axial direction of the positioning hollow tube and penetrates through the wire penetrating hole; it is characterized in that the method comprises the steps of,

2. A liquid heater as claimed in claim 1, wherein: the cover part is longitudinally provided with a plurality of through holes, the liquid inlet channel and the liquid outlet channel are formed in the cover part and all extend from the lower surface of the cover part to the side wall of the cover part, the liquid inlet channel and the liquid outlet channel are both eccentrically arranged, and the mounting holes on the heating wire positioning plate are eccentrically arranged and are equal to the eccentric distance of the liquid inlet channel.

3. A liquid heater as claimed in claim 1 or claim 2, wherein: the heating wire positioning plate is provided with a first virtual circle, a second virtual circle and a third virtual circle which are concentric from inside to outside, a plurality of wire penetrating holes are distributed on at least one virtual circle of the first virtual circle, the second virtual circle and the third virtual circle, and a plurality of auxiliary through holes are distributed on at least one virtual circle of the first virtual circle, the second virtual circle and the third virtual circle.

4. A liquid heater as claimed in claim 1 or claim 2, wherein: the distance between adjacent wire penetrating holes is S1, the distance between the wire penetrating holes adjacent to the mounting holes and the mounting holes is S2, the distance between the wire penetrating holes adjacent to the periphery of the heating wire positioning plate and the periphery of the heating wire positioning plate is S3, and when S1 is more than 1/3D2 or S2 is more than 1/3D2 or S3 is more than 1/3D2, the auxiliary through holes are correspondingly formed in the area where S1 or S2 or S3 is located.

5. A liquid heater as claimed in claim 1 or claim 2, wherein: the circle center connecting line of any three auxiliary through holes is triangular, and the center of the triangle falls into the area where the wire through holes are located.

6. A liquid heater as claimed in claim 1, wherein: auxiliary through holes on the axially adjacent heating wire positioning plates are arranged right opposite.

7. The liquid heater as claimed in claim 6, wherein: at least part of the positioning hollow tube is welded on the cover part in a sealing way and positioned outside the liquid inlet channel or is inserted in the liquid inlet channel in a sealing way, and a rotation-stopping matched orientation part and a matching part are formed between the heating wire positioning plate and the positioning hollow tube.

8. A liquid heater as claimed in claim 1, wherein: the heating wire is provided with a first end and a second end opposite to the first end, the heating wire is wound on all the heating wire positioning plates, and the power wire can pass through the auxiliary through hole to be electrically connected with the first end and/or the second end of the heating wire.

9. A liquid heater as claimed in claim 1, wherein: the fluororesin layer extends spirally along the axial direction, the thickness of the fluororesin layer is 0.5-2mm, and the pitch of the fluororesin layer is 3-12mm.

10. A liquid heater as claimed in claim 2, wherein: the lower surface of the cover part is provided with a protection joint corresponding to each through hole, the protection joint comprises a joint body connected with the through holes in a threaded mode and a nut connected with the joint body in a threaded mode, the outer side of the power line is sleeved with a pressing bead, and the nut is connected with the joint body in a threaded mode to press the pressing bead.