CN218959145U - Heater - Google Patents

Abstract

The utility model discloses a heater, which is provided with a liquid inlet channel and a liquid outlet channel, and is provided with a power line in a penetrating way, and the heater also comprises: the heating container is provided with an opening end, and a heating wire is arranged in the inner cavity; a cover member hermetically connected to the heating container; one end of the positioning hollow tube is connected with the liquid inlet channel so as to convey fluid into the heating container, the other end of the positioning hollow tube extends to the inner bottom of the heating container, a heating wire positioning plate with a wire penetrating hole is sleeved on the periphery of the positioning hollow tube, and the heating wire extends along the axial direction of the positioning hollow tube and penetrates through the wire penetrating hole; the periphery of the positioning hollow tube is also provided with at least two separation supporting pieces which are alternately arranged with the heating wire positioning plates, and the adjacent separation supporting pieces clamp and support the heating wire positioning plates. The utility model utilizes the heating wire locating plate to form a constraint function on the heating wire, thereby avoiding curling and winding of the heating wire and fully heating the liquid; the separation supporting piece is utilized to form stable clamping support on two sides of the heating wire positioning plate, so that the positioning hollow tube cannot be damaged to cause the disconnection and scattering of the positioning hollow tube.

Description

Heater

Technical Field

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

Background

In the semiconductor manufacturing process, chemicals such as ultrapure water (DIW), sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, and hydrofluoric acid (hereinafter simply referred to as "chemicals") are used as cleaning chemicals, etching chemicals, and developing chemicals. These chemicals are heated to a temperature to be chemically active and used 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, namely a teflon heater, and referring to fig. 1, 2 and 6 in the patent document, the heater discloses a main body 2 made of teflon material and a positioning rod 4 made of teflon material arranged in the main body 2, wherein the main body 2 is provided with a water inlet 12 and a water outlet 11; the positioning rod 4 comprises an inner runner 41 communicated with the water inlet 12 and an outer runner 42 arranged in the main body 2, the outer runner 42 is communicated with the inner runner 41 and the water outlet 11, the heater also comprises heating wires 5 which are arranged in the outer runner 42 and are coated with teflon films on the surfaces, and at least 2 heating wire positioning plates 6 are sleeved on the positioning rod 4 at intervals along the axial direction of the positioning rod 4. When the water heater is used, water to be heated enters the main body 2 from the water inlet 12, contacts with the heating wire 5 and flows out from the water outlet 11, the water is heated and warmed through the heating wire 5, and the water is contacted with the teflon material in the heating process, so that metal ions are not generated, the purity of the water is ensured, and the defect of low yield caused by cleaning wafers by high-temperature water in the prior art is overcome. In the above structure, although at least two heater wire positioning plates 6 are sleeved on the positioning rod 4 in the axial direction, the positioning rod 4 is formed by mutually assembling a plurality of positioning pipes through threads, that is, the external thread section 431 of the lower positioning pipe 43 and the internal thread section 432 of the upper positioning pipe 43 are in threaded connection, since the external diameter of the external thread section 431 is smaller than that of the positioning pipe 43, the central hole of the heater wire positioning plate 6 is matched with the external thread section 431 in size, when the heater wire positioning plate 6 is installed, the heater wire positioning plate 6 is firstly arranged at the bottom position of the external thread 431 through the central hole, therefore, the heater wire positioning plate 6 can be clamped at a boss formed by the external thread section 431 and the positioning pipe 43, and since the connection between the external thread section 431 and the internal thread section 432 is a non-sealing thread, the tightness is poor, a small amount of liquid to be heated leaks from the connection position between the positioning pipes 43, and the leaked liquid cannot be fully heated by contacting with the heater wire 5. In addition, the liquid flowing upwards from the bottom of the positioning rod 4 can apply a certain upward force to the heating wire positioning plate 6 when passing through the heating wire positioning plate 6, the external thread section 431 is slightly displaced upwards due to the abrasion of the heating wire positioning plate 6 under the action of the force, the positioning pipes 43 are easy to be disjointed, and the strength of the positioning rod 4 is reduced due to the fact that the positioning rod 4 is formed by combining more positioning pipes 43.

In the prior art, KR101546178B1, entitled "on-line heater for heating chemicals in semiconductor manufacturing process", referring to fig. 1, 2 and 4 of the patent document, a container 41 made of a fluororesin material, a case 1 made of a fluororesin material provided on top of the container 41 in communication therewith, and a heating wire 33 provided in an inner cavity of the container 41 are disclosed, and a coating layer made of a fluororesin material is provided on a surface of the heating wire 33. One end of the shell 1 is provided with a liquid inlet pipe 3 which is used for leading liquid to be heated into the bottom of the inner cavity of the container 41, and the other end of the shell 1 is provided with a liquid outlet pipe 5 which is communicated with the top of the inner cavity of the container 41. The shell 1 is provided with wire mounting tubes 7a and 7b, wherein the liquid inlet tube 3, the liquid outlet tube 5 and the wire mounting tubes 7a and 7b are made of fluorine resin materials and integrally formed on the shell 1, the heater further comprises power wire assemblies 53a and 53b which are respectively penetrated in the wire mounting tubes 7a and 7b and are electrically connected with the heating wires 33, and the power wire assemblies 53a and 53b are respectively inserted in the wire mounting tubes 7a and 7b to maintain air tightness and water tightness. In the above-described structure, the power lines 53a,53b are exposed to the heated chemical at the positions where they are connected to the heating wire 33, and if the sealing property of the connection between the power line 53a and the heating wire 33 is poor, the chemical may enter the power line 53a, and the chemical may contact the insulating rubber layer outside the corrosion power line, and further the chemical may precipitate metal ions in the power line and the metal ions in the heating wire 33, and the precipitated metal ions may contaminate the heated chemical. Therefore, whether the connection sealing performance between the power line and the heating wire is good or bad is important.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the heater which can firmly support the heating wire positioning plate and has no risk of leakage of liquid before the liquid reaches the bottom of the positioning hollow tube.

The technical scheme adopted for solving the technical problems is as follows: a heater on which a liquid inlet channel and a liquid outlet channel are formed, a power line is arranged on the heater in a penetrating way, and the heater further comprises:

the heating container is provided with an opening end, and a heating wire connected with the power line is arranged in the inner cavity;

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

one end of the positioning hollow tube is connected with the liquid inlet channel so as to convey fluid into the heating container, the other end of the positioning hollow tube extends to the inner bottom of the heating container, a heating wire positioning plate with a wire penetrating hole is sleeved on the periphery of the positioning hollow tube, and the heating wire extends along the axial direction of the positioning hollow tube and penetrates through the wire penetrating hole;

and at least two separation supporting pieces are arranged on the periphery of the positioning hollow tube and are alternately arranged with the heating wire positioning plates, and the adjacent separation supporting pieces clamp and support the heating wire positioning plates.

According to the utility model, the heating wire is arranged in the wire penetrating hole of the heating wire positioning plate in a penetrating way, the heating wire positioning plate is utilized to form constraint and support functions on the heating wire, and the radial large-amplitude deviation of the heating wire is limited, so that the heating wire is prevented from being curled and wound together, and the unfolded heating wire is used for fully heating the liquid in the heating container. Meanwhile, a separation supporting piece arranged on the outer side of the positioning hollow tube is used for forming stable clamping and supporting on two sides of the heating wire positioning plate, so that on one hand, the liquid in the positioning hollow tube does not have the risk of leakage before reaching the bottom of the heating container, and the heating effect is better after the liquid is discharged from the bottom of the positioning hollow tube and fully contacted with the heating wire; on the other hand, the heating wire locating plate is supported and clamped by the separation supporting piece in the supported process, so that the locating hollow tube cannot be damaged to cause the disconnection and the scattering of the locating hollow tube.

Further, the separation supporting piece is a cylindrical sleeve sleeved on the periphery of the positioning hollow tube in a sliding mode, and the separation supporting piece can axially slide along the positioning hollow tube and is positioned at a preset position on the positioning hollow tube.

The separation support piece is a cylindrical sleeve, so that the processing is convenient, only the sliding sleeve is needed to be arranged on the periphery of the positioning hollow tube, the whole assembly structure is simple, no other connecting structure is needed, and the installation is convenient. The separation supporting piece slides along the positioning hollow tube, on one hand, the separation supporting piece and the positioning hollow tube can be in free sliding fit, at the moment, the separation supporting piece is convenient to disassemble or assemble, certain machining errors can exist on the outer diameter of the positioning hollow tube and the inner diameter of the separation supporting piece, the requirements on the machining precision of the positioning hollow tube and the separation supporting piece are low, and the assembly flexibility is high; on the other hand, the two can also be in damping sliding fit, after the separation supporting piece is installed, the damping hollow pipe can be in limiting connection with the positioning hollow pipe under the damping effect, the positioning hollow pipe plays a certain supporting role on the separation supporting piece, the separation supporting piece cannot slide at will, all the separation supporting pieces and the heating wire positioning plates are conveniently and orderly installed one by one, and the damping force between the positioning hollow pipe and the separation supporting piece can also play a certain supporting role on the heating wire positioning plates.

Further, the bottom end of the positioning hollow tube is connected with a fixing sleeve, and the end face of the fixing sleeve is propped against the heating wire positioning plate or the separation supporting piece so as to extrude all the heating wire positioning plates and the separation supporting piece to the direction of the cover part.

The fixed sleeve sets up in the bottom of location hollow tube, and it can be with the lower surface interval cooperation of lid, provides stable centre gripping support respectively in all heater strip locating plates and the both sides of separating support piece.

Further, the axial heights of the separation supporting pieces are uniform, so that the heating wire positioning plates are uniformly separated; alternatively, at least two of the partition supports have different axial heights to unevenly partition the heater wire positioning plate.

When the axial heights of the separation supporting pieces are the same, the heating wire positioning plates can be uniformly separated, and the stress on the heating wires is relatively uniform. When all the separation supporting pieces have two axial heights, only one separation supporting piece has different axial heights at the moment, the same plurality of separation supporting pieces with the first axial heights can be utilized to uniformly separate the heating wire positioning plates, and the separation supporting pieces with the second axial heights are selected at the bottom end of the lowest positioning hollow pipe according to the residual supporting length required by the positioning hollow pipe so as to compensate the residual supporting length of the positioning hollow pipe, thereby adapting to the positioning hollow pipes with different axial heights or compensating the axial height machining deviation of the positioning hollow pipe. When all the separation supporting pieces have more than two axial heights, namely, the separation supporting pieces with various different axial heights are customized, a user selects the separation supporting pieces with different axial heights to enable the heating wire positioning plates to be unevenly separated, the purpose that the tensile forces of different parts of the heating wires in the axial direction are different is achieved, the use flexibility is high, and the device is suitable for different use scenes.

Further, the liquid inlet channel is eccentrically arranged on the cover part, and the liquid outlet channel is positioned beside the liquid inlet channel.

The arrangement can effectively utilize the surface of the cover part, and the sizes of the liquid outlet channel and the liquid inlet channel and the positions of the liquid outlet channel and the liquid inlet channel on the surface of the cover part can be reasonably set; after the liquid outlet channel and the liquid inlet channel are arranged, a certain area can be reserved for other holes with certain sizes which need to be formed later.

Further, the heating wire locating plate is provided with a mounting hole for the locating hollow tube to pass through, the mounting hole is eccentrically arranged, the separation supporting piece is provided with a through hole for the locating hollow tube to pass through, the through hole is eccentrically arranged and has the same eccentric direction as the mounting hole, and a rotation-stopping matched orientation part and a matching part are formed between the outer wall of the locating hollow tube and the separation supporting piece.

The mounting hole on the heating wire locating plate is eccentrically arranged, so that the eccentric arrangement of the liquid inlet channel can be adapted, and the heating wire locating plate can be matched with the heating container to fully utilize the space in the heating container. The installation hole is eccentric to be set up the back can make the quantity distribution of the regional wire hole of big area of heater strip locating plate more, the regional distribution of the less area of heater strip locating plate is few, therefore the power of heater strip that the big regional atress of heater strip locating plate received is big, the through-hole eccentric setting just is the same with the eccentric direction of installation hole, the great regional position of the big regional position of heater strip locating plate of through-hole periphery wall thickness department can correspond promptly, then the great department of wall thickness of separate support piece can form more firm centre gripping effect to the big regional formation of area of installation hole periphery, improve holistic steadiness to bear the heater strip to the bigger external force of its formation. The orientation part and the matching part form rotation-stopping matching between the positioning hollow pipe and the separation supporting piece so as to limit the rotation of the separation supporting piece and ensure that the larger area of the periphery of the mounting hole is always opposite to the larger wall thickness of the periphery of the through hole.

Further, the outer surface of the power wire is coated with a first fluororesin layer, the outer surface of the heating wire is coated with a second fluororesin layer, a connecting layer is coated at the joint of the power wire and the heating wire, and the first fluororesin layer extends to form an elongated fluororesin layer which is in sealing joint with the second fluororesin layer to coat the connecting layer.

The arrangement of the connecting layer ensures that the power line is not easy to be extracted and separated from the heating wire, the lengthened fluororesin layer realizes effective connection between the first fluororesin layer and the second fluororesin layer, and the lengthened fluororesin layer and the second fluororesin layer are integrated by hot melting welding through hot melting of the lengthened fluororesin layer; under the corrosion-resistant effect of the first fluorine resin layer, the second fluorine resin layer and the lengthened fluorine resin layer, the power line and the heating wire can be effectively prevented from being corroded by corrosive liquid to be heated, good sealing is formed at the joint of the power line and the heating wire, and liquid cannot be immersed into the power line and the heating wire at the joint of the power line, the heating wire and the heating wire.

Further, the heating wire spirally extends along the axial direction; the second fluorine resin layer is elastically abutted against the inner wall of the threading hole.

The total length of the heating wire can be prolonged by the spirally extending heating wire, so that the heating effect on liquid is improved, the spirally extending heating wire can prop against the wire penetrating holes of the heating wire positioning plate to form radial support, and the powerful supporting effect of the heating wire positioning plate on the heating wire is guaranteed.

Further, the cover member is connected with the heating container through a connecting piece, a threaded area is formed on the outer wall of the cover member, an annular flange is formed at the opening end of the heating container, a sealing piece is arranged on the end face, and the connecting piece is in threaded connection with the threaded area and abuts against the annular flange so as to form sealing fit between the heating container and the cover member through the sealing piece.

When the heating container and the cover part are assembled, only the connecting piece is screwed, the connecting piece moves upwards at the opening end of the heating container in the screwing process, and the heavy heating container and/or the cover part are/is not required to be screwed singly, so that the connection between the heating container and the cover part is convenient and labor-saving to install.

Further, the bottom of the heating container is provided with a waste liquid outlet communicated with the inner cavity of the heating container.

The waste flushing liquid formed after flushing the heating container is conveniently discharged from the waste liquid outlet.

The beneficial effects of the utility model are as follows: the heating wire locating plate is used for restraining and supporting the heating wire, and the radial large-amplitude deviation of the heating wire is limited, so that the heating wire is prevented from being curled and wound together, and the unfolded heating wire is used for fully heating liquid in the heating container. The separation supporting piece arranged on the outer side of the positioning hollow tube is used for forming stable clamping and supporting on two sides of the heating wire positioning plate, so that on one hand, the risk of leakage does not exist before the liquid in the positioning hollow tube reaches the bottom of the heating container, and the heating effect is better after the liquid is discharged from the bottom of the positioning hollow tube and fully contacted with the heating wire; on the other hand, the heating wire locating plate is supported and clamped by the separation supporting piece in the supported process, so that the locating hollow tube cannot be damaged to cause the disconnection and the scattering of the locating hollow tube. In addition, the power cord is difficult to draw out and separate from the heater strip, prevents effectively that the corrosive liquid that treats the heating from corroding power cord and heater strip, and liquid can not be immersed in power cord and heater strip by the junction on first fluorine resin layer, second fluorine resin layer and extension fluorine resin layer.

Drawings

Fig. 1 is a perspective cross-sectional view of a heater according to an embodiment of the present utility model, in which the inlet channel is visible.

Fig. 2 is a perspective sectional view of a heater according to the embodiment of the present utility model, in which the liquid outlet passage is visible.

Fig. 3 is a schematic view of a three-dimensional mating structure of a positioning hollow tube, a heating wire positioning plate and a partition support according to an embodiment of the present utility model.

Fig. 4 is a plan view of a cover member in a heater according to an embodiment of the present utility model.

Fig. 5 is a bottom view of a cover member in a heater according to an embodiment of the present utility model.

Fig. 6 is a cross-sectional view of A-A of a heater according to an embodiment of the present utility model.

Fig. 7 is an enlarged view of the structure at a in fig. 6.

Fig. 8 is an enlarged view of the structure at B in fig. 6.

Fig. 9 is a cross-sectional view of a heater wire positioning plate in a heater according to an embodiment of the present utility model.

Fig. 10 is a cross-sectional view of a heater-removed heating container according to an embodiment of the present utility model.

Fig. 11 is an exploded cross-sectional view of a positioning hollow tube, a partition support, and a heater wire positioning plate in a heater according to an embodiment of the present utility model.

Fig. 12 is a schematic view showing a fitting structure of a heating wire positioning plate and a partition supporting member in the heater according to the embodiment of the present utility model, in which the mounting hole and the through hole are both eccentrically disposed.

Fig. 13 is a schematic view showing a connection structure of a heater heating wire and a power line according to the embodiment of the present utility model.

The device comprises a 1-heating container, an 11-opening end, a 12-power line, a 13-heating wire, a 14-annular flange, a 15-sealing piece, a 16-waste liquid discharge port, a 161-waste liquid discharge screw cap, a 2-cover part, a 21-connecting piece, a 22-threaded area, a 23-liquid inlet hole, a 231-screw cap, a 3-positioning hollow tube, a 31-liquid inlet channel, a 32-wire penetrating hole, a 33-heating wire positioning plate, a 331-mounting hole, a 34-separation supporting piece, a 341-through hole, a 35-fixing sleeve, a 36-liquid outlet channel, a 37-overflow hole, a 4-connecting layer, a 41-first fluorine resin layer, a 42-second fluorine resin layer and a 43-lengthened fluorine resin layer.

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 13, a heater is formed with a liquid inlet channel 31 and a liquid outlet channel 36, a power line 12 is penetrated on the heater, the heater comprises a heating container 1 with an opening end 11, a cover part 2 which is connected with the opening end 11 of the heating container 1 in a sealing way, and a positioning hollow tube 3 for conveying fluid into the heating container 1. 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 inner bottom of the heating container 1. A heating wire positioning plate 33 is sleeved on the outer periphery of the positioning hollow tube 3, the heating wire positioning plate 33 is provided with a plurality of wire penetrating holes 32, and the heating wire 13 extends along the axial direction of the positioning hollow tube 3 and penetrates through the wire penetrating holes 32.

The positioning hollow tube 3 is also provided at its outer periphery with at least two partition supports 34, which partition supports 34 are arranged alternately with the heating wire positioning plates 33, so that adjacent partition supports 34 form a clamping support for the heating wire positioning plates 33. The partition support 34 separates the adjacent heater wire positioning plates 33, and the partition support 34 can support the heater wire positioning plate 33 above it and receive the force from the heater wire positioning plate 33 above it, thereby reducing the force of the heater wire positioning plate 33 due to the penetration of the heater wire 13.

Taking the direction shown in fig. 6 as an example, the top-most partition supporting piece 34 is abutted against the lower surface of the cover part 2, when all the partition supporting pieces 34 and the heating wire positioning plates 33 are arranged on the positioning hollow tube 3, the bottom-most partition supporting piece 34 is fixed, so that the partition supporting piece 34 supports all the heating wire positioning plates 33 upwards, namely, by using the upper and lower clamping of the partition supporting pieces 34, the heating wire positioning plates 33 are relatively fixedly sleeved on the periphery of the positioning hollow tube 3, no other connecting structure is needed, therefore, the liquid in the positioning hollow tube 3 is not leaked before reaching the bottom of the heating container 1, the liquid in the positioning hollow tube 3 is heated more fully, the assembly structure is simple, and each partition supporting piece 34 and each heating wire positioning plate 33 are not needed to be fixed respectively. In addition, the positioning hollow tube 3 is integrally formed, and in this embodiment, the positioning hollow tube 3 is integrally formed, that is, is a hollow cylindrical structure, which integrally extends to the bottom of the heating container 1. Compared with the existing positioning hollow tube 3 which is composed of a plurality of sections, the heating wire positioning plate 3 is supported and clamped by the separation supporting piece 34 in the supported process, and the positioning hollow tube 3 cannot be damaged to cause the disconnection and the scattering of the positioning hollow tube.

As shown in fig. 7, 10, and 11, in the present embodiment, the partition support 34 is a cylindrical sleeve slidably fitted over the outer periphery of the positioning hollow tube 3, and the partition support 34 is axially slidable along the positioning hollow tube 3 and is positioned at a predetermined position on the positioning hollow tube 3. Of course, in other embodiments, the partition support 34 may have other structures, such as two semicircular ring structures formed by splicing, and the specific structure is not limited as long as the partition support 34 can be abutted.

In order to fix the lowermost spacer support 34, a fixing sleeve 35 is connected to the bottom end of the positioning hollow tube 3, and its end surface abuts against the heater wire positioning plate 33 or abuts against the spacer support 34, and mainly whether the heater wire positioning plate 33 or the spacer support 34 is located at the lowermost end in the axial direction of the positioning hollow tube 3 is considered. After the fixing sleeve 35 is fixedly connected, all the heating wire positioning plates 33 and the partition supporting members 34 can be pressed in the direction where the cover member 2 is located, in other words, the fixing sleeve 35 is matched with the lower surface of the cover member 2, and stable clamping of all the heating wire positioning plates 33 and the partition supporting members 34 is realized from the upper side and the lower side. The fixed connection manner of the fixing sleeve 35 and the positioning hollow tube 3 is not particularly limited, and may be welding, gluing, screwing, or integrally forming, etc., so long as the fixing sleeve 35 can be fixedly arranged at the bottom end of the positioning hollow tube 3. The fixing sleeve 35 may also be a cylindrical sleeve, the lowermost partition support 34 or the heater wire positioning plate 33 in the axial direction of the positioning hollow tube 3 receiving the force from the upper heater wire positioning plate 33 and the force of the partition support 34, and the lowermost partition support 34 or the heater wire positioning plate 33 being supported at the top end of the fixing sleeve 35. In addition, the bottom of the outer wall of the positioning hollow tube 3 is provided with an overflow hole 37, the fixed sleeve is provided with a corresponding overflow hole 37, and the liquid to be heated flows to the bottom of the inner cavity of the heating container 1 through the overflow hole 37.

The axial heights of the separation supporting pieces 34 are the same, so that the heating wire positioning plates 33 can be uniformly separated, and the stress on the heating wires 13 is relatively uniform. Of course, to accommodate different usage scenarios, the spacer supports 34 may be designed to be of different heights, or at least the axial heights of the two spacer supports 34 may be different, as desired. If the remaining axial support height of the positioning hollow tube 3 is smaller than the axial height of the first type of partition support 34 after all the heating wire positioning plates 33 and the first type of partition support 34 are sleeved on the outer periphery of the positioning hollow tube 3, the remaining axial support height of the positioning hollow tube 3 can be supplemented by the partition support 34 with the second type of axial height (lower than the first type of axial height), so that the assembly flexibility is higher. As another example, the distance between any two adjacent heating wire positioning plates 33 can be adjusted, so that radial supporting forces of the heating wires 13 at different positions in the axial direction can be combed and adjusted, and when the required pulling force of the heating wires 13 positioned at the top and the bottom of the heating container 1 is larger or smaller, the corresponding axial length of the separation supporting piece 34 positioned at the top and the bottom of the heating container 1 can be shortened or increased, so that the flexibility of use is high, and the device is suitable for different use scenes.

As shown in fig. 1, 2 or 5, in the present embodiment, the liquid inlet channel 31 and the liquid outlet channel 36 are both formed in the cover member 2, and the liquid inlet hole 23 and the liquid outlet hole are formed in the outer wall of the cover member 2, and the liquid outlet channel 36 communicates with the liquid outlet hole. The liquid inlet channel 31 is eccentrically arranged on the cover member 2, and the liquid outlet channel 36 is located beside the liquid inlet channel 31, so that the surface of the cover member 2 can be effectively utilized, and the sizes of the liquid outlet channel 36 and the liquid inlet channel 31 and the positions of the liquid outlet channel 36 and the liquid inlet channel 31 on the surface of the cover member 2 can be reasonably arranged. In addition, after the liquid outlet channel 36 and the liquid inlet channel 31 are arranged, a certain area can be reserved for other holes with certain sizes which need to be formed later. The liquid inlet 23 and the liquid outlet may be disposed opposite to each other, or the central extension line of the liquid inlet 23 and the central extension line of the liquid outlet may intersect at 90 °.

The positioning hollow tube 3 is detachably connected to the liquid inlet channel 31, a central hole of the positioning hollow tube 3 is communicated with the liquid inlet channel 31, an internal thread section is arranged at a 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. Of course, the positioning hollow tube 3 may be integrally provided on the cover member 2, so that leakage of the liquid to be heated from the junction of the positioning hollow tube 3 and the liquid inlet channel 31 is reduced.

As shown in fig. 12, the heater wire positioning plate 33 is provided with a mounting hole 331 through which the positioning hollow tube 3 passes, the mounting hole 331 is provided eccentrically, and the partition support 34 is provided with a through hole 341 through which the positioning hollow tube 3 passes, the through hole 341 is also provided eccentrically, and the eccentric direction of the mounting hole 331 is the same. That is, a large area region is defined in which the plurality of wire passing holes 32 are intensively distributed at the outer circumference of the mounting hole 331, and is vertically opposite to the larger wall thickness region of the outer circumference of the through hole 341 to increase the contact area of the heating wire positioning plate 33 and the partition support 34, so that the heating wire 13 is sufficiently spread and stably supported.

The separation supporting piece 34 and the positioning hollow tube 3 can be in damping sliding fit or free sliding fit. A directional part and a matching part which are matched in a rotation-stopping way are formed between the outer wall of the positioning hollow tube 3 and the separation supporting piece 34, the positioning part can be a groove positioned on the outer wall of the positioning hollow tube 3, the matching part can be a protrusion positioned on the inner wall of the separation supporting piece 34, the groove can be a closed groove or an open groove, and when the groove is a closed groove, the protrusion is elastically clamped in the groove to limit the rotation of the separation supporting piece 34 in the circumferential direction; when an open groove, which communicates from the top end to the bottom end of the positioning hollow tube 3, the projection can slide in or out from the top end or the bottom end of the positioning hollow tube 3, and the projection can be positioned in the groove to restrict rotation of the partition support 34 in the circumferential direction. It is of course also possible that the positioning portion is a protrusion located on the outer wall of the positioning hollow tube 3 and the mating portion is a recess located on the inner wall of the partition support 34.

The arrangement of the orientation part and the matching part not only facilitates the assembly between the positioning hollow tube 3 and the separation supporting piece 34, but also prevents the separation supporting piece 34 and the positioning hollow tube 3 from rotating relatively, and ensures that the larger area of the periphery of the mounting hole 331 is opposite to the larger wall thickness of the periphery of the through hole 341.

As shown in fig. 13, the outer surface of the power wire 12 is coated with a first fluororesin layer 41, the outer surface of the heating wire 13 is coated with a second fluororesin layer 42, a part of the power wire 12 and the heating wire 13 are respectively exposed outside the first fluororesin layer 41 and the second fluororesin layer 42 for convenient connection, and the connection part of the power wire 12 and the heating wire 13 is coated with a connection layer 4. At the same time, the first fluororesin layer 41 is extended to form an elongated fluororesin layer 43, which is sealed and bonded to the second fluororesin layer 42 after coating the connection layer 4, specifically, may be sealed and bonded to an end outer wall of the second fluororesin layer 42.

The connection layer 4 may be a metal tube such as a copper tube, the connection layer 4 is arranged to make the power cord 12 not easy to be drawn out and separated from the heating wire 13, the part of the outer periphery of the heating wire 13 except the connection layer 4 is wrapped with the second fluororesin layer 42, the part of the outer periphery of the power cord 12 except the connection layer 4 is wrapped with the first fluororesin layer 41, the first fluororesin layer 41 extends towards the direction of the second fluororesin layer 42 for a predetermined distance to form an elongated fluororesin layer 43, the elongated fluororesin layer 43 realizes effective connection between the first fluororesin layer 41 and the second fluororesin layer 42, and the elongated fluororesin layer 43 and the second fluororesin layer 42 are subjected to hot-melt welding into a whole by hot-melt elongated fluororesin layer 43. Under the corrosion-resistant action of the first fluororesin layer 41, the second fluororesin layer 42 and the lengthened fluororesin layer 43, the power line 12 and the heating wire 13 can be effectively prevented from being corroded by corrosive liquid to be heated, and good sealing is formed at the joint due to welding of the three under high-temperature pressure, and the liquid cannot be immersed into the power line 12 and the heating wire 13 at the joint of the three.

The heating wire 13 extends in the axial direction in a spiral winding manner and is arranged around the outer circumferential side of the positioning hollow tube 3, the total length of the heating wire 13 can be prolonged in a spiral extending manner, the heating effect on liquid is improved, the second fluorine resin layer 42 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 number of the wire passing holes 32 is not limited, and is actually opened according to the installation of the heating wire 13. So set up, because heater strip 13 runs through heater strip locating plate 33 in the axial, the holding power that heater strip locating plate 33 provided not only can separate the heater strip 13 of axial arrangement for heater strip 13 fully expands, prevents that heater strip 13 from rocking the back in the radial direction and winding in a confused way together, and fully expanded heater strip 13 is favorable to waiting to heat liquid and heater strip 13 surface to carry out abundant contact, improves heater strip 13 surface area's utilization ratio.

When the heating device is used, liquid to be heated enters from the liquid inlet hole 23, enters the positioning hollow tube 3 through the liquid inlet channel 31 and flows into the bottom of the inner cavity of the heating container 1, the space from the position hollow tube 3 to the outer periphery side of the positioning hollow tube 3 is contacted with the heating wire 13, the liquid gradually fills the inner cavity of the heating container 1 along the direction from the bottom of the heating container 1 to the top, the heating wire 3 is electrified by the power wire 12 to heat the contacted liquid, and the heated liquid enters the liquid outlet channel 36 and is discharged through the liquid outlet hole.

The cover member 2 is connected to the heating container 1 by a connector 21, specifically, as shown in fig. 8, a screw thread region 22 is formed on the outer wall of the cover member 2, an annular flange 14 is formed at the opening end 11 of the heating container 1, and a seal groove for engaging the seal 15 is formed at the upper end surface of the annular flange 14. The connecting piece 21 movably arranged at the open end 11 of the heating vessel 1 can be screwed with the threaded area 22, and the outer wall of the connecting piece is also provided with an annular convex edge, the inner diameter of the annular convex edge is matched with the outer diameter of the heating vessel 1, when the heating vessel is installed, the annular convex edge is propped against the annular flange 14, the annular flange 14 limits the upward movement of the annular convex edge, the connecting piece 21 is prevented from being separated from the open end 11 of the heating vessel 1, so that the cover part 2 and the heating vessel 2 press the sealing piece 15 towards each other, and the sealing fit of the heating vessel 1 and the cover part 2 is formed through the sealing piece 15.

Since the heating container 1 and the cover member 2 have a certain volume, so that the heating container 1 and the cover member 2 have a relatively large weight, when the heating container 1 and the cover member 2 are assembled, only the connecting piece 21 is screwed, the connecting piece 21 moves upwards at the opening end 11 of the heating container 1 in the screwing process, the internal thread of the inner wall of the connecting piece 21 is in threaded connection with the threaded area of the outer wall of the cover member 2 until the annular flange moves upwards and abuts against the lower surface of the annular flange 14, and therefore the connecting piece 21 locks the cover member 2 at the opening end 11 of the heating container 1, and the connection of the two parts is performed without taking effort to separately screw the relatively heavy heating container 1 and/or the cover member 2.

In the present embodiment, the heating container 1 and the cover member 2 are both made of a fluororesin material, and the heating wire positioning plate 33, the partition support 34, and the fixing sleeve 35 may also be made of a fluororesin material including, but not limited to, PFA or PTFE.

The bottom of the heating container 1 is provided with a waste liquid discharge port 16 communicated with the inner cavity of the heating container 1, and a waste liquid discharge nut 161 for sealing the waste liquid discharge port 16 is detachably arranged on the waste liquid discharge port 16, or a waste liquid discharge pipeline and a corresponding switch valve are communicated with the waste liquid discharge port 16. So arranged, the flushing waste liquid formed after flushing the heating vessel 1 is facilitated, and the flushing waste liquid can be discharged from the waste liquid discharge port 16 by opening the waste liquid discharge screw cap 161 or the valve.

The cover member 2 is provided with a plurality of holes including power line through holes through which the power lines 12 pass, and the number and positions of the power line through holes are not particularly limited, but preferably six, because the power lines 12 are three-phase power sources.

The plurality of holes further includes at least one vent hole in which the vent pipe and the valve are communicatively installed, and the vent hole may be provided as an upstream vent hole in communication with the liquid inlet channel 31 and/or a downstream vent hole in communication with the liquid outlet channel 36. In this way, before the heating wire 13 is electrified, in order to ensure that the heating container 1 is full of liquid, the heating container 1 needs to be exhausted, specifically, a valve on a pipeline of an exhaust hole on the cover part 2 is opened, liquid is introduced from the liquid inlet hole 23, and the liquid extrudes air in the heating container 1 to be exhausted from the exhaust pipeline until no air exists in the exhaust hole pipeline. So set up, the rational utilization exhaust hole is carried out the exhaust to heating container 1, makes to wait to heat liquid and fills the inside of heating container 1 effectively.

The plurality of through holes further comprise a temperature sensing wire through hole, a temperature control switch sensor wire hole, a liquid level wire hole and a ground wire hole, wherein the temperature sensing wire hole is formed at the side of the liquid outlet channel 36, a cable of a temperature sensor for detecting the liquid temperature at the liquid outlet side is arranged in the temperature sensing wire hole in a penetrating manner, the temperature control switch sensor wire hole is internally provided with a cable of a temperature control switch in a penetrating manner, the temperature control switch is respectively electrically connected with the power wire 12 and the temperature sensor, the temperature control switch is used for controlling the power wire 12 to be powered off when the temperature sensor detects that the liquid reaches a preset temperature, the liquid level wire hole is internally provided with a cable of a liquid level sensor for detecting the liquid level height of the liquid in the heating container 1 in a penetrating manner, and the ground wire hole is internally provided with a ground wire cable.

The sizes of the power line through hole, the exhaust hole, the temperature sensing line through hole, the temperature control line hole, the liquid level line hole and the ground line hole can be consistent, the setting positions can be freely set according to the technical personnel in the field, threads or embedded nuts are arranged in the holes, and the setting is convenient for detachable connection with a connector with threads, and the connector can be further connected with a nut 231.

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 (10)

1. A heater on which a liquid inlet channel and a liquid outlet channel are formed, a power line is arranged on the heater in a penetrating way, and the heater further comprises:

the heating container is provided with an opening end, and a heating wire connected with the power line is arranged in the inner cavity;

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

one end of the positioning hollow tube is connected with the liquid inlet channel so as to convey fluid into the heating container, the other end of the positioning hollow tube extends to the inner bottom of the heating container, a heating wire positioning plate with a wire penetrating hole is sleeved on the periphery of the positioning hollow tube, and the heating wire extends along the axial direction of the positioning hollow tube and penetrates through the wire penetrating hole; the method is characterized in that:

and at least two separation supporting pieces are arranged on the periphery of the positioning hollow tube and are alternately arranged with the heating wire positioning plates, and the adjacent separation supporting pieces clamp and support the heating wire positioning plates.

2. A heater according to claim 1, wherein: the separation supporting piece is a cylindrical sleeve sleeved on the periphery of the positioning hollow tube in a sliding mode, and can axially slide along the positioning hollow tube and be positioned at a preset position on the positioning hollow tube.

3. A heater according to claim 2, wherein: the bottom end of the positioning hollow tube is connected with a fixed sleeve, and the end face of the fixed sleeve is propped against the heating wire positioning plate or the separation supporting piece so as to extrude all the heating wire positioning plates and the separation supporting piece to the direction of the cover part.

4. A heater according to claim 1 or 2, wherein: the axial heights of the separation supporting pieces are uniform, so that the heating wire positioning plates are uniformly separated; alternatively, at least two of the partition supports have different axial heights to unevenly partition the heater wire positioning plate.

5. A heater according to claim 2, wherein: the liquid inlet channel is eccentrically arranged on the cover part, and the liquid outlet channel is positioned beside the liquid inlet channel.

6. A heater according to claim 2, wherein: the heating wire locating plate is provided with a mounting hole for the locating hollow tube to pass through, the mounting hole is eccentrically arranged, the separation supporting piece is provided with a through hole for the locating hollow tube to pass through, the through hole is eccentrically arranged and has the same eccentric direction as the mounting hole, and a rotation-stopping matched orientation part and a matching part are formed between the outer wall of the locating hollow tube and the separation supporting piece.

7. A heater according to claim 1, wherein: the power wire is characterized in that the outer surface of the power wire is coated with a first fluororesin layer, the outer surface of the heating wire is coated with a second fluororesin layer, a connecting layer is coated at the joint of the power wire and the heating wire, and the first fluororesin layer extends to form an lengthened fluororesin layer which is in sealing joint with the second fluororesin layer to coat the connecting layer.

8. The heater according to claim 7, wherein: the heating wire spirally extends along the axial direction;

the second fluorine resin layer is elastically abutted against the inner wall of the threading hole.

9. A heater according to claim 1, wherein: the cover part is connected with the heating container through the connecting piece, a threaded area is formed on the outer wall of the cover part, an annular flange is formed at the opening end of the heating container, a sealing piece is arranged on the end face of the heating container, the connecting piece is in threaded connection with the threaded area and abuts against the annular flange, and therefore sealing fit between the heating container and the cover part is formed through the sealing piece.

10. A heater according to claim 1, wherein: the bottom of the heating container is provided with a waste liquid outlet communicated with the inner cavity of the heating container.

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