CN111351212A

CN111351212A - Heating device

Info

Publication number: CN111351212A
Application number: CN201811581033.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Runcheng Intelligent Control Technology Co ltd
Current assignee: Zhejiang Runcheng Intelligent Control Technology Co ltd
Priority date: 2018-12-24
Filing date: 2018-12-24
Publication date: 2020-06-30

Abstract

The invention discloses a heating device, wherein a heating pipe set comprises a shell and a heating pipe, a heating element is embedded in the heating pipe and is electrically connected with a conductive part outside the heating pipe, the heating pipe set forms a heating cavity, a first heating area of the heating cavity is formed between the outer wall of the heating pipe and the inner wall of the shell, a second heating area of the heating cavity is formed in the inner space of the heating pipe, the outer wall of the heating pipe and/or the inner wall of the shell comprise at least one diversion convex part and at least one diversion groove, the heating pipe set forms a heating cavity with a smaller gap, and through the arrangement of the heating cavity, fluid passing through the heating cavity can be fully heated, and the heating efficiency is favorably improved.

Description

Heating device

Technical Field

The invention relates to the field of heating of household appliances.

Background

The liquid heating mode that present applicant knows has static liquid heating mode, and static liquid heating mode generally adopts the heating pipe to hold liquid in the container and heats, and under general condition, electric heating pipe need heat whole container in liquid, and the liquid heating time is longer. The liquid in the container is transferred by heat generated by the heating pipe through heat conduction, so that the heating effect is obvious, the power of the heating pipe can be improved to accelerate the heating speed, or the liquid heating time is longer, and the heating efficiency is lower.

Disclosure of Invention

An object of the present invention is to provide a heating device advantageous for improving heating efficiency.

In order to realize the purpose, the following technical scheme is adopted: a heating device comprises a heating tube set, the heating tube set comprises a shell and a heating tube, the shell is positioned on the outer peripheral side of the heating tube, a heating element is embedded in the heating pipe and is electrically connected with the conductive part outside the heating pipe, the heating pipe group forms a heating cavity, the first heating area of the heating cavity is formed between the outer wall of the heating pipe and the inner wall of the shell, the second heating area of the heating cavity is formed in the inner space of the heating pipe, a first opening at one end of the heating pipe is communicated with the first heating area, a second opening at the other end of the heating pipe is communicated with an outlet or an inlet of the heating device, the outer wall of the heating pipe comprises at least one flow guide convex part and at least one flow guide groove, and/or the inner wall of the shell comprises at least one flow guide convex part and at least one flow guide groove.

According to the technical scheme, the shell and the heating pipe are arranged, the first heating area and the second heating area of the heating cavity can enable flowing liquid to be in full thermal contact, heat generated by the heating pipe can be absorbed conveniently, and therefore heating efficiency is improved.

Drawings

Fig. 1 to 3 are schematic structural views of a heating apparatus according to an embodiment of the present invention;

fig. 4 to 5 are schematic structural views of a heating tube set of a heating apparatus according to still another embodiment of the present invention.

Detailed Description

In order that the technical solutions of the present invention will be more clearly understood, the present invention will be described in detail below with reference to the accompanying drawings in conjunction with specific embodiments. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Referring to fig. 1 to 5, a heating device 100 according to the present invention can be applied to a situation that needs to heat water, and includes a heating pipe assembly 1, the heating pipe assembly includes a casing 11 and a heating pipe 12, the casing is located at an outer peripheral side of the heating pipe, a heating element 13 is embedded in the heating pipe, the heating element is electrically connected to a conductive portion outside the heating pipe, the heating pipe assembly forms a heating cavity, a first heating area 101 of the heating cavity is formed between an outer wall of the heating pipe and an inner wall of the casing, a second heating area 102 of the heating cavity is formed in an inner space of the heating pipe, a first opening 120 at one end of the heating pipe is communicated with the first heating area, a second opening 121 at the other end of the heating pipe is communicated with an inlet of the heating pipe assembly, the first heating area is communicated with an outlet of the heating pipe assembly, that is, a medium enters the, The flow is carried out in the interlayer area between the heating pipe 12 and the shell 11, which is beneficial to secondary heating of the medium and outflow of the mixed medium from an outlet, and reduces the possibility of uneven cooling and heating; the heating tube set is provided with a heat conducting element 13 which is arranged close to the inlet, the heat conducting element is arranged in contact with a power element of a control board of the heating device, and when the power element generates heat, the heat conducting element can conduct heat to the inside of the heating tube set, so that the heating loss of the power element is reduced.

As an alternative, the second opening 121 at the other end of the heating tube is communicated with the outlet of the heating device, that is, the heating tube firstly passes through the first heating area outside the heating tube and then enters the second heating area inside the heating tube, and the heating tube directly flows out of the outlet after being heated, so that relatively rapid heating can be realized; the outer wall of the heating pipe comprises at least one flow guide convex part 122 and at least one flow guide groove 123, and/or the inner wall of the shell comprises at least one flow guide convex part and at least one flow guide groove, so that the turbulent flow effect is relatively increased, the heating path is lengthened, the temperature stability is facilitated, the insulating property is better when the heating element is embedded, and the heat conduction effect is not influenced. In the embodiment, at least part of the flow guide convex part on the inner wall of the shell continuously extends and forms, and the flow guide groove and the flow guide convex part are arranged in a staggered manner along the axial direction of the heating pipe group, so that a spiral flow channel is formed on the inner wall of the shell, and a heating path is relatively increased; the outer side of the heating pipe is provided with a groove part extending along the axis direction, and the groove part can be used for facilitating demoulding after the heating pipe is embedded and formed.

The first end cap portion 111 of the heating device comprises an inlet channel, which is in communication with the second opening, and is fixedly arranged with the heat conducting element 13, and is sealed therebetween, so that the heat conducting element can thermally contact the medium in the heating device, facilitating heat absorption. The heating device is provided with the sealing ring positioned on one side of the first end cover part and the heat conducting element, the part of the heating device is sealed outwards, the other side of the heat conducting element is in direct contact with the power element or is in indirect contact with the power element through the heat conducting layer to conduct heat, the heat conducting structure is simple and direct, and heat on the power element 2 can be conducted to a medium to some extent, so that waste heat or waste heat utilization is facilitated. The temperature sensing part of the temperature detection element of the heating device extends into the inlet channel, the end part of the heating pipe on the same side as the second opening and the first end cover part are arranged in a sealing mode, leakage can be reduced, temperature detection is carried out, and the temperature detection is provided for the controller. The control end of the temperature detection element 21 and the heat conduction element are both connected to the same control board, and the end part of the heating pipe on the same side as the second opening and the first end cover part are arranged in a sealing mode, so that insulation and isolation are achieved, and damage to the electric device due to medium leakage is prevented.

On the other hand, the inner wall of the shell 11 can be provided with no turbulent flow structure, and the shell is of an integral structure, so that the fluid can smoothly flow out after being heated; or as another scheme, the outer shell 11 includes a first shell 112 formed by injection molding and a second shell 113 formed by injection molding, and the first shell forms a part of the flow guiding protrusion and a part of the flow guiding groove integrally, the second shell forms another part of the flow guiding protrusion and another part of the flow guiding groove integrally, the first shell and the second shell are integrally connected into a whole, so that the inner wall of the outer shell forms a continuous flow channel, the first heating area is formed between the flow guiding protrusion and the outer wall of the heating tube, the distance between the flow guiding protrusion and the outer wall of the heating tube is less than 2mm or 1mm or less than 0.6mm or less than 0.5mm, the gap is small, the fluid passing through the heating assembly can be sufficiently heated, the flowing type heating of the fluid is realized, the gap of the heating area ensures the sufficient thermal contact of the flowing liquid, and the heat provided by the heating film structure can be better absorbed and better transferred to the heating cavity, thereby contributing to the improvement of the heating efficiency. More specifically, the water conservancy diversion convex part includes root base portion and protruding end, protruding end certainly root base portion outwards extends, and protruding end sets up with the inner wall of shell relatively, and the distance between the inner wall of this protruding end and shell is less than 0.4mm to allow the fluid of relative flow to pass through when reducing the clearance relatively, be favorable to promoting heating efficiency, when the water conservancy diversion convex part with helical configuration from the one end of shell extend to the other end of heating pipe in succession, the continuous vortex runner that forms reduces fluid resistance and can fully heat the fluid that overflows.

Of course, it is also possible that the heating pipe 12 and the housing 11 are both provided with flow guiding protrusions to form a flow guiding structure, the heating cavity is formed between the outer wall of the heating pipe and the inner wall of the housing, the minimum distance between the heating pipe and the outer wall of the housing is less than 2mm, 1mm, 0.6mm, 0.5mm, 0.4mm, and the like, specifically, the gap is defined as the vertical distance between the flow guiding protrusion and the inner wall or the outer wall of the opposite side, for example, the positions of the flow guiding protrusions arranged on the heating pipe and the housing are staggered with each other, so that the fluid can flow through the depth of the flow guiding groove as much as possible rather than only through the gap, that is.

The first shell 112 and the second shell 123 are welded and connected, the end of the heating pipe 12 on the second opening side is connected with the first end cover part of the heating device in a sealing manner, one end of the outer shell is arranged between the first end cover part in a sealing manner, the other end of the outer shell is arranged between the second end cover part of the heating device in a sealing manner, and therefore leakage of a medium is prevented when the medium circulates between the first heating area and the second heating area.

The heating pipe 12 comprises an insulating shell which is embedded and formed with a heating element, wherein the heating element is a conductive metal sheet or a conductive metal wire; insulating casing cladding is in the outside of conductive metal piece or conductive wire, and the conductive part exposes insulating casing, and this conductive part and heating device's wiring or lug welded fastening can make heating element fix a position firmly like this, and it is better to be inlayed the insulating nature including establishing, and the heat conduction effect is not influenced.

The heating pipe comprises a ceramic shell which is embedded and formed into an integral structure with a heating element, wherein the heating element is a conductive metal sheet or a conductive metal wire; the ceramic shell is coated on the outer side of the conductive metal sheet or the conductive metal wire, the conductive part is exposed out of the ceramic shell, the conductive part is welded and fixed with the wiring or the lug of the heating device, the heat conduction effect of the ceramic shell is better, the corrosion resistance is better, and harmful substances are not easy to diffuse into heating fluid after being heated.

It should be noted that, in addition to the ceramic tube, the heating tube 12 may be a heat-resistant plastic tube or metal tube, which is made of food grade material if used in a drinking device and meets the drinking standard, or a metal material or alloy material with good heat conductivity, such as aluminum, copper, silver, etc. Of course, the raised portion of the heating tube is not limited to a spiral structure, and may also be in various other arrangements, so that the fluid flows in a zigzag manner on the outer surface of the heating tube, the flow path is relatively extended, and the heating efficiency is improved. Wherein, the screw pitch of helical structure can be equidistance or variable interval for the heating effect is better. As another embodiment, the guiding grooves 123 may also be labyrinth-shaped channels, and two or more guiding protrusions 122 are disposed on the outer side of the heating tube 12 along the transverse direction of the heating tube 12, or two or more guiding grooves 123 are disposed on the outer side of the heating tube 12, the guiding grooves 123 and the guiding protrusions 122 are discretely disposed on the outer side of the heating tube 12, and the guiding protrusions and the guiding grooves are staggered in the transverse direction of the heating tube, so that the fluid is relatively uniformly distributed on the outer wall of the heating tube as much as possible, and each part is utilized as much as possible, so as to accelerate the heating speed of the fluid.

The heating device is also provided with a flow regulating component 3, the flow regulating component comprises an outer shell 31, a valve core 32 and a flow measuring element 33, the outer shell comprises a first shell part 311 and a second shell part 312 which are connected integrally, the flow regulating component also comprises a driving motor 34, the driving motor is in transmission connection with the valve core, the first shell part is provided with a valve port part, the valve core can rotate relative to the valve port part and can regulate the flow area of the valve port part, the flow measuring element is arranged in a rotating way relative to the outer shell, the flow measuring element is positioned in an accommodating cavity formed in the second shell part and communicated with an inlet and an outlet of the outer shell, a flow measuring structure and a structure for controlling the flow of the valve core are simultaneously configured through the integrated structure, the integration degree is better, and a connecting metal plate arranged on the flow regulating component is fixed with, and the connection metal sheet can be used for heat conduction, and the medium that circulates in the holding cavity of second casing portion can outwards dispel the heat through this connection metal sheet, is favorable to protecting driving motor.

The flow rate measuring element 33 can detect the flow rate value of the working medium conducted by the flow rate adjusting assembly by rotating relative to the outer shell, the driving motor 34 is positioned outside the outer shell 31, the power output part of the driving motor is mechanically connected with the valve core to realize transmission, the valve core can be controlled, and the flow rate measuring element is arranged, so that convenient flow rate measurement can be realized through transmission. The flow measuring element 33 comprises an impeller, a magnetic ring fixedly connected with the impeller, and a hall element arranged in the induction range of the magnetic ring, the magnetic ring at least comprises two pairs of magnetic poles, each pair of magnetic poles comprises an S pole and an N pole, and the flow velocity or the flow rate is measured through the change of the hall induction magnetic ring. The outer shell 31 is fixed relative to the Hall element, and the inner wall of the outer shell is provided with a groove for accommodating the Hall element; or, connect metal sheet and hall element relatively fixed setting, be located the magnetic field scope of magnetic ring with hall element so that accurate response, and set up hall element waterproof construction, can generate the signal of telecommunication and transmit for control module through the law of magnetic pole change. Specifically, the water outlet side of the valve core 32 is communicated with the water inlet side of the impeller, or the water outlet side of the impeller is communicated with the water inlet or the water outlet of the heating device, and the water outlet side of the impeller and the water inlet or the water outlet of the heating device are connected in series in terms of a flow path; in the embodiment, the impeller is sleeved outside the rotating shaft of the valve core or the impeller is integrally connected with the valve core, and the water outlet side of the impeller is communicated with the water inlet or the water outlet of the heating device, so that the overall size of the flow regulating assembly can be reduced.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims

1. A heating device is characterized by comprising a heating pipe set, wherein the heating pipe set comprises a shell and heating pipes, the shell is positioned on the outer peripheral side of the heating pipe, a heating element is embedded in the heating pipe and is electrically connected with the conductive part outside the heating pipe, the heating pipe group forms a heating cavity, the first heating area of the heating cavity is formed between the outer wall of the heating pipe and the inner wall of the shell, the second heating area of the heating cavity is formed in the inner space of the heating pipe, a first opening at one end of the heating pipe is communicated with the first heating area, a second opening at the other end of the heating pipe is communicated with an outlet or an inlet of the heating device, the outer wall of the heating pipe comprises at least one flow guide convex part and at least one flow guide groove, and/or the inner wall of the shell comprises at least one flow guide convex part and at least one flow guide groove.

2. The heating device of claim 1, wherein: at least part of the flow guide convex part extends continuously to form, and the flow guide grooves and the flow guide convex part are arranged in a staggered mode along the axial direction of the heating pipe set, so that a spiral flow passage is formed on the outer wall of the heating pipe or the inner wall of the shell.

3. The heating device according to claim 1 or 2, wherein: the heating pipe comprises an insulating shell which is embedded and molded with the heating element, and the heating element is a conductive metal sheet or a conductive metal wire; the insulating shell is coated on the outer side of the conductive metal sheet or the conductive metal wire, the conductive part is exposed out of the insulating shell, and the conductive part is welded and fixed with the wiring or the wiring lug of the heating device.

4. The heating device of claim 2, wherein: the outer shell comprises a first shell and a second shell, wherein the first shell and the second shell are integrally formed, one part of the flow guide protruding part and one part of the flow guide groove are integrally formed, the second shell and the other part of the flow guide protruding part and the other part of the flow guide groove are integrally connected, so that a continuous flow channel is formed on the inner wall of the outer shell, the first heating area is formed between the flow guide protruding part and the outer wall of the heating pipe, and the distance between the flow guide protruding part and the outer wall of the heating pipe is smaller than 2mm or 1mm or smaller than 0.6mm or smaller than 0.5mm or smaller than 0.4 mm.

5. The heating device of claim 4, wherein: the first shell is connected with the second shell in a welding mode, the end portion of the second opening side of the heating pipe is connected with the first end cover portion of the heating device in a sealing mode, one end of the shell is arranged between the first end cover portion and the first end cover portion in a sealing mode, and the other end of the shell is arranged between the second end cover portion of the heating device in a sealing mode.

6. The heating device according to claim 1 or 2, wherein: the axial both ends opening of heating pipe is formed with first opening, the second opening, heating device's import and this second opening intercommunication, this first opening with the import side intercommunication of first heating region, the outlet side of first heating region with heating device's export intercommunication, the water conservancy diversion convex part includes root base portion and protrusion end, the protrusion end certainly root base portion outwards extends, just the protrusion end with the inner wall of shell sets up relatively, this protrusion end with the distance between the inner wall of shell is less than 0.4 mm.

7. The heating device of claim 6, wherein: the first end cover part of the heating device comprises an inlet channel, the inlet channel is communicated with the second opening, a temperature sensing part of a temperature detection element of the heating device extends into the inlet channel, and the end part of the heating pipe on the same side as the second opening is hermetically arranged with the first end cover part.

8. The heating device of claim 4, wherein: the flow guide convex part continuously extends from one end of the shell to the other end of the heating pipe in a spiral structure.

9. The heating device of claim 5, wherein: the outer side of the heating pipe is provided with a groove part extending along the axial direction.