Heating Tube Encapsulation Structure, Heating Mechanism and Capsule Brewing Machine

Abstract

The present invention provides a heating tube encapsulation structure, a heating mechanism and a capsule brewing machine. The heating tube encapsulation structure includes: a housing having an inner channel capable of accommodating a heating tube, a fluid guide body located inside the heating tube and passing through the inner channel, and an over-flow annular cavity formed between the fluid guide body and the heating tube; two end closures respectively plugged at both ends of the inner channel, the end closures having water inlet and outlet channels which can be communicated with the over-flow annular cavity. The heating tube encapsulation structure of the present invention can well seal and connect the heating tube, so that the whole heating mechanism has high pressure resistance, meeting the pressure resistance requirement of the capsule brewing machine for the heating mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a heating tube encapsulation structure, a heating mechanism and a capsule brewing machine. Background Art

[0002] The nano-coated electrothermal quartz tube is made into a heating component and widely used in the electrothermal drinking utensil industry, such as water dispensers, coffee machines, tea brewing machines, etc., because of its advantages of fast heating speed, no heavy metals, and not easy to scale. However, it has not been applied to brewing machines with pressure extraction, such as capsule tea brewing machines, capsule coffee machines, etc.

[0003] The brewing pressure of the capsule is at most about 12 bar. Generally, a water pump with a pressure of 15 bar is selected for the capsule brewing machine, and this value is the upper limit of the capsule brewing pressure. For safety reasons, the requirement for the pressure resistance of the appliance should be twice the maximum pressure. Therefore, the pressure resistance requirement for the heating component is generally 30 bar. At present, the pressure resistance of the existing nano-film quartz tube heating component is generally below 3 bar, which cannot meet the requirements of the pressurized capsule machine.

[0004] Since the nano-film quartz tube is a tubular shape with both ends open, it is difficult to achieve sealing. At the same time, compared with metal tubes, it is more difficult for quartz tubes to achieve a firm connection with other components inside the assembly. This results in the heating component using the nano-film quartz tube being unable to withstand high pressure and thus cannot be applied to the pressurized capsule machine for brewing. Summary of the Invention

[0005] The purpose of the present invention is to provide a heating tube encapsulation structure that can well seal and connect the heating tube, so that the pressure resistance of the entire heating mechanism is high, meeting the pressure resistance requirements of the capsule brewing machine for the heating mechanism.

[0006] Another purpose of the present invention is to provide a heating mechanism that well seals and connects the heating tube through the heating tube encapsulation structure. The heating mechanism has high pressure resistance and meets the pressure resistance requirements of the capsule brewing machine for the heating mechanism.

[0007] Another purpose of the present invention is to provide a capsule brewing machine that has a heating mechanism with high pressure resistance, meets the pressure resistance requirements of the capsule brewing machine for the heating mechanism, and the heating mechanism can be firmly connected to other components inside the capsule brewing machine.

[0008] The above purposes of the present invention can be achieved by the following technical solutions:

[0009] The present invention provides a heating tube encapsulation structure, and the heating tube encapsulation structure includes:

[0010] A housing having an inner channel capable of accommodating a heating tube. A fluid guide is disposed in the inner channel and passes through the heating tube, and an overflow annular cavity is formed between the fluid guide and the heating tube;

[0011] Two end closures, respectively plugging the two ends of the inner channel, the end closures having water inlet and outlet channels which can communicate with the flow-through ring cavity.

[0012] In an embodiment of the present invention, the end closures include:

[0013] An outer end cover having a cover body sleeved on the end of the outer shell and a water inlet and outlet joint connected to the cover body;

[0014] A seal located inside the cover body, the seal being sealingly clamped to the ends of the heating tube and the fluid guide, the seal having a flow-through channel, and the water inlet and outlet holes of the water inlet and outlet joint, the inner cavity of the cover body and the flow-through channel form the water inlet and outlet channels.

[0015] In an embodiment of the present invention, the seal includes a sealing cover plug, the sealing cover plug having a coaxial outer ring wall and inner ring wall, an end wall is connected between the outer ring wall and the inner ring wall, a flow-through channel is formed in the middle of the inner ring wall, and the end of the heating tube is inserted between the outer ring wall and the inner ring wall and abuts against the end wall.

[0016] In an embodiment of the present invention, a plurality of sealing ridges are provided at intervals on the outer surface of the outer ring wall along the axial direction of the sealing cover plug, and a ring ridge is provided on the outer surface of the end wall.

[0017] In an embodiment of the present invention, the fluid guide is a hollow guide tube inside, and the seal further includes a plug, the plug having a plug body that can be inserted into the end of the guide tube and an abutting convex ring provided on the outer periphery of the plug body, and the abutting convex ring can abut against the end surface of the guide tube.

[0018] In an embodiment of the present invention, at least one limiting boss is provided inside the cover body of the outer end cover, and the limiting boss extends into the flow-through channel and abuts against the plug.

[0019] In an embodiment of the present invention, the water inlet and outlet joint has an installation channel, the installation channel communicates with the water inlet and outlet holes of the water inlet and outlet joint, and a temperature measuring probe can be inserted into the installation channel.

[0020] In an embodiment of the present invention, a connecting boss is provided between the cover body and the water inlet and outlet joint.

[0021] In an embodiment of the present invention, a plurality of first sliding channels extending along the axial direction of the outer shell are provided on the outer wall of the outer shell, and the plurality of first sliding channels are arranged at intervals in the circumferential direction of the outer shell. A plurality of connection holes are provided on the cover body of the outer end cover. In a state where the cover body is sleeved on the end of the outer shell, the plurality of connection holes can correspond to the plurality of first sliding channels and are connected by connecting members.

[0022] In an embodiment of the present invention, the outer shell has an open opening communicating with its inner channel, and at least one overload protection mechanism is provided in the open opening, and at least one of the overload protection mechanisms is disposed opposite to the heating tube.

[0023] In an embodiment of the present invention, second sliding channels are respectively provided on the side walls of the outer shell on both sides of the open opening, the second sliding channels extend along the axial direction of the outer shell, and the overload protection mechanism can be slidably disposed in the second sliding channels.

[0024] In an embodiment of the present invention, a semi-closed third sliding channel is provided on the outer wall of the outer shell, the third sliding channel is located between two adjacent first sliding channels, and a wire threading pipe can be clamped in the third sliding channel.

[0025] In an embodiment of the present invention, the overload protection mechanism is a temperature sensor.

[0026] In an embodiment of the present invention, a flow disturbing member is provided in the overcurrent ring cavity.

[0027] In an embodiment of the present invention, the flow disturbing member is a spring, and the spring is sleeved on the fluid guide.

[0028] In an embodiment of the present invention, the fluid guide is a hollow guide tube.

[0029] In an embodiment of the present invention, the distance between the fluid guide and the heating tube is 0.5 mm to 1.5 mm.

[0030] The present invention also provides a heating mechanism, including a heating tube and the heating tube encapsulation structure as described above, and the heating tube is disposed between the outer shell and the fluid guide of the heating tube encapsulation structure.

[0031] In an embodiment of the present invention, the heating tube includes a nano-coated quartz tube and electrical connection metal sheets sleeved at both ends of the nano-coated quartz tube.

[0032] The present invention also provides a capsule brewing machine, which includes a brewing machine body and the heating mechanism as described above provided in the brewing machine body.

[0033] The features and advantages of the present invention are:

[0034] 1. The heating tube encapsulation structure of the present invention. The two end closures can highly seal the heating tube, and the end closures can be firmly connected to the outer shell. By encapsulating the structure of the heating tube, the pressure resistance of the heating tube is improved as a whole, so that the heating mechanism composed of the heating tube and the heating tube encapsulation structure has a higher pressure resistance than that of the heating tube, meeting the high pressure resistance requirement of the heating mechanism and enabling it to be widely used in products with high requirements for pressure resistance performance.

[0035] 2. The heating tube encapsulation structure of the present invention. By arranging a flow guide body in the heating tube, compared with the prior art where only the inner channel of the heating tube is used to heat the water flow, the arrangement of the flow guide body compresses the space of the inner channel of the heating tube, enabling the water flow to be heated to flow through the flow ring cavity between the flow guide body and the heating tube. By reducing the water flow rate flowing into the heating tube, the water flow can be fully heated.

[0036] 3. The heating tube encapsulation structure of the present invention. A flow disturbing member is arranged in the flow ring cavity between the flow guide body and the heating tube, and the flow disturbing member is used to stir the water flow flowing through the flow ring cavity, enabling the water flow to be fully and evenly heated in the heating tube.

[0037] 4. The heating mechanism and capsule brewing machine of the present invention. By encapsulating the heating tube encapsulation structure on the heating tube, the pressure resistance of the heating tube is improved as a whole, so that the heating mechanism composed of the heating tube and the heating tube encapsulation structure has a higher pressure resistance than that of the heating tube, meeting the high pressure resistance requirement of the heating mechanism and enabling it to be widely used in products with high requirements for pressure resistance performance. The present invention effectively solves the problem that the nano-coated quartz tube cannot be applied to the pressure-brewing capsule machine, broadens the application field of the nano-coated quartz tube, and at the same time finds a new solution for the efficient and rapid heating of the capsule brewing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a top view structural schematic diagram of the heating tube encapsulation structure of the present invention.

[0040] Figure 2 It is Figure 1 the sectional view taken along the line A - A in

[0041] Figure 3 It is Figure 2 the enlarged view of part B in

[0042] Figure 4 is Figure 2 an enlarged view of part C in

[0043] Figure 5 is a three-dimensional structural schematic diagram of the outer shell of the present invention.

[0044] Figure 6 is a side view of the outer shell of the present invention.

[0045] Figure 7 is a three-dimensional structural schematic diagram of the outer end cap of the end closure of the present invention.

[0046] Figure 8 is a front view of the outer end cap of the present invention.

[0047] Figure 9 is a right view of the outer end cap of the present invention.

[0048] Figure 10 is a bottom view of the outer end cap of the present invention.

[0049] Figure 11 is Figure 9 a sectional view taken along line D-D in

[0050] Figure 12 is a three-dimensional structural schematic diagram of the sealing cover plug of the end closure of the present invention.

[0051] Figure 13 is a front view of the sealing cover plug of the present invention.

[0052] Figure 14 is a sectional view of the sealing cover plug of the present invention.

[0053] Figure 15 is a three-dimensional structural schematic diagram of the plug of the end closure of the present invention.

[0054] Figure 16 is a front view of the plug of the present invention.

[0055] Figure 17 is a bottom view of the plug of the present invention.

[0056] Figure 18 is a structural schematic diagram of the sleeve fluid sleeved with a spring cooperating with the plug of the present invention.

[0057] Figure 19 is Figure 18 an enlarged view of part E in

[0058] Figure 20 is a pressure holding curve graph when the heating mechanism of the present invention is tested at a pressure of 30 bar.

[0059] Reference Numerals and Descriptions:

[0060] 1. Outer shell; 11. Inner channel; 12. Flow guide; 121. Flow-through ring cavity; 122. Turbulence inducer; 13. First slideway; 14. Open end; 15. Second slideway; 16. Third slideway; 161. Opening slit; 2. End closure; 21. Water inlet and outlet channel; 22. Outer end cover; 221. Cover body; 2211. Inner cavity; 2212. Connecting hole; 2213. Cylinder; 2214. Reinforcing rib; 2215. Convex rod; 222. Water inlet and outlet joint; 2221. Water inlet and outlet hole; 2222. Installation channel; 2223. Annular fixing platform; 2224. Silicone sealing ring; 2225. Opposite perforation; 2226. Opposite perforation; 223. Connecting boss; 224. Groove; 23. Sealing member; 231. Flow-through channel; 232. Sealing cover plug; 2321. Outer ring wall; 2322. Inner ring wall; 2323. End wall; 2324. Sealing convex rib; 2325. Ring convex rib; 233. Plug; 2331. Plug body; 2332. Abutting convex ring; 2333. Convex block; 3. Heating tube; 31. Electrically conductive metal sheet; 4. Overload protection mechanism; 5. Conduit; 6. Temperature measuring probe; 61. Annular mounting platform; 62. Temperature measuring probe; 63. Wiring; 7. Water inlet and outlet pipe; 8. U-shaped clamp. Detailed Embodiments

[0061] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0062] Embodiment 1

[0063] As Figure 1 and Figure 2As shown, the present invention provides a heating tube packaging structure, the heating tube packaging structure comprises: an outer shell 1 and two end closures 2; wherein the outer shell 1 has an inner channel 11 capable of accommodating a heating tube 3, a guide body 12 located in the heating tube 3 is passed through the inner channel 11, and a flow ring cavity 121 is formed between the guide body 12 and the heating tube 3; the two end closures 2 respectively block the two ends of the inner channel 11, and the end closures 2 have water inlet and outlet channels 21, and the water inlet and outlet channels 21 can communicate with the flow ring cavity 121. In the heating tube packaging structure of the present invention, the two end closures 2 can highly seal the heating tube 3, and the end closures 2 can be firmly connected to the outer shell 1. By structurally packaging the heating tube 3, the withstand pressure of the heating tube 3 is improved as a whole, so that the heating mechanism composed of the heating tube 3 and the heating tube packaging structure has a withstand pressure higher than the withstand pressure of the heating tube 3, which meets the high pressure resistance of the heating mechanism, so that it can be widely used in products with high pressure resistance requirements.

[0064] The body guide 12 disposed in the heating tube 3 is made of stainless steel. The outer diameter of the body guide 12 is smaller than the inner diameter of the heating tube 3, so that a flow annular cavity 121 is formed between the body guide 12 and the heating tube 3, and the water to be heated flows through the flow annular cavity 121. Compared with the prior art method of heating the water flow only through the inner channel of the heating tube 3, the present invention compresses the space of the inner channel of the heating tube 3 through the arrangement of the body guide 12, so that the water flow to be heated flows through the flow annular cavity 121, and the water flow is fully heated by reducing the water flow flowing into the heating tube 3. In this embodiment, the spacing between the body guide 12 and the heating tube 3 is 0.5mm to 1.5mm.

[0065] In the present invention, a spoiler 122 is provided in the flow ring cavity 121, and the spoiler 122 is used to stir the water flowing through the flow ring cavity 121, so that the water flow can be fully and evenly heated in the heating tube 3. In this embodiment, the spoiler 122 is a spring, which is sleeved on the guide body 12, and the two ends of the spring can be tightened and fixed by the end closure 2; of course, in other embodiments, the spoiler 122 can also be a blade set on the outer surface of the guide body 12, etc., which is not limited here.

[0066] Furthermore, the flow guide 12 of the present invention may be a flow guide tube with a hollow interior, which can reduce the weight of the flow guide 12 on one hand, and facilitate structural packaging and fixation with the end closure member 2 on the other hand.

[0067] In the present invention, Figure 5 and Figure 6As shown, the shell 1 is made of aluminum, which has good thermal conductivity and can quickly dissipate the heat radiated by the heating tube 3 to prevent the heating component from being overheated and shortening its life; the shell 1 is an aluminum profile processed by an extrusion molding process, and is generally in the shape of a rectangular frame so that it can be fixedly fitted with the inner wall of a machine (for example, a capsule brewing machine, etc.) and is easy to position; the interior of the shell 1 is hollow to form an inner channel 11 running through both ends of the shell 1, and the flow guide 12 and the heating tube 3 are located in the inner channel 11.

[0068] In one embodiment of the present invention, the outer wall of the housing 1 is provided with a plurality of first slideways 13 extending along the axial direction of the housing 1, and the plurality of first slideways 13 are arranged at intervals along the circumferential direction of the housing 1, and the first slideways 13 are used to realize the connection between the housing 1 and the end closure 2. Specifically, the first slideways 13 are arranged at equal intervals along the circumference of the housing 1. In this embodiment, a first slideway 13 is provided at each of the four end corners of the rectangular housing 1. The cross section of the first slideway 13 is circular, and has an open slit facing the outside of the housing 1 for use with self-tapping screws. The open slit is used to provide a buffer for screwing in the screws, so as to release the radial force generated by the screws being screwed into the first slideway 13, thereby protecting the aluminum housing 1.

[0069] Furthermore, the housing 1 has an open opening 14 connected to the inner channel 11 thereof, that is, the rectangular housing 1 has a structure in which three sides surround the heating tube 3 in the radial direction and one side is open; at least one overload protection mechanism 4 is arranged in the open opening 14, and at least one overload protection mechanism 4 is arranged opposite to the heating tube 3, such as Figure 1 and Figure 2 In this embodiment, the overload protection mechanism 4 is a temperature sensor, and its function is: when the temperature of the heating tube 3 exceeds the safety range value, the overload protection mechanism 4 will convert the detected temperature into a signal and transmit it to the external control circuit board, and the control circuit board will issue an instruction to stop the heating of the heating tube 3 to avoid accidents caused by faults or affecting the service life of the heating mechanism.

[0070] Please refer to Figure 5 and Figure 6 As shown, second slideways 15 are respectively provided on the side walls of the housing 1 on both sides of the open opening 14 . The second slideways 15 extend along the axial direction of the housing 1 , and the overload protection mechanism 4 is slidably disposed in the second slideways 15 .

[0071] Furthermore, a semi-enclosed third slideway 16 is provided on the outer wall of the housing 1, that is, the third slideway 16 has an open slit 161, and the third slideway 16 is located between two adjacent first slideways 13, and the threading tube 5 can be clamped in the third slideway 16. The threading tube 5 is made of aluminum alloy or stainless steel, and is inserted into the third slideway 16 by interference fit. The setting of the open slit 161, on the one hand, provides the possibility of adapting to threading tubes 5 of different outer diameters, and on the other hand, improves the stable connection between the third slideway 16 and the threading tube 5. In the present invention, a water supply pipeline can be provided in the threading tube 5. On the one hand, the threading tube 5 can protect the water supply pipeline, and on the other hand, the unheated water flowing into the water supply pipeline can take away the heat of the housing 1, and cool the housing 1.

[0072] The end closure member 2 is used to seal the end of the housing 1 , and the water inlet and outlet channels 21 of the end closure member 2 can be communicated with the flow annular cavity 121 between the guiding body 12 and the heating tube 3 .

[0073] In one embodiment of the present invention, Figures 7 to 17 As shown, the end closure 2 includes an outer end cover 22 and a sealing member 23, wherein: the outer end cover 22 has a cover body 221 sleeved on the end of the outer shell 1, and an inlet and outlet water joint 222 connected to the cover body 221; the sealing member 23 is located in the cover body 221, and the sealing member 23 is sealed and clamped to the end of the heating tube 3 and the end of the guide body 12, and the sealing member 23 has a flow passage 231, and the inlet and outlet water holes 2221 and the flow passage 231 of the inlet and outlet water joint 222 form the inlet and outlet water passage 21. The end closure 2 of the present invention is firmly connected to the outer shell 1 through the outer end cover 22, and the end of the heating tube 3 and the end of the guide body 12 are sealed through the sealing member 23. The end closure 2 can provide a good sealing environment for the heating tube 3 and can be firmly connected to the outer shell 1.

[0074] like Figures 7 to 11As shown, the outer end cap 22 is made of plastic by an integral injection molding process, and the plastic can be, for example, food-grade polycarbonate (PC) or polypropylene (PP). In order to match the structure of the housing 1, the cover body 221 of the outer end cap 22 is a rectangular structure with a groove as a whole, and the inner diameter of the cover body 221 matches the outer diameter of the housing 1. In this embodiment, the cover body 221 is provided with a plurality of connection holes 2212, for example, a connection hole 2212 is respectively provided at the four end corners of the cover body 221. When the cover body 221 is sleeved on the end of the housing 1, the plurality of connection holes 2212 can correspond to the plurality of first slideways 13 on the housing 1 and be connected through a connector. For example, the connection hole 2212 can be a threaded hole, and the first slideway 13 and the connection hole 2212 are fixedly connected by screws to realize the connection between the outer end cap 22 and the housing 1. With this connection method, the outer end cap 22 can be more firmly connected to the housing 1.

[0075] In the present invention, a cylinder 2213 is provided in the inner cavity 2211 of the cover body 221, and the height of the cylinder 2213 is lower than the height of the outer wall of the cover body 221. A plurality of reinforcing ribs 2214 radiate outward along the outer wall of the cylinder 2213. The reinforcing ribs 2214 extend to connect with the outer wall of the cover body 221. The height of the reinforcing ribs 2214 gradually increases from the cylinder 2213 to the outer wall of the cover body 221, and the highest point is lower than the height of the outer wall of the cover body 221.

[0076] The water inlet and outlet joint 222 of the outer end cover 22 has an installation channel 2222, and the installation channel 2222 is connected to the water inlet and outlet holes 2221 of the water inlet and outlet joint 222. The temperature measuring probe 6 can be inserted into the installation channel 2222. Figure 4 Specifically, the installation channel 2222 is connected to the inner cavity 2211 of the cover body 221, and is coaxially arranged with the cylinder 2213 in the cover body 221. Figure 11 As shown, a ring-shaped fixing platform 2223 is provided inside the installation channel 2222 . The width of the ring-shaped fixing platform 2223 is 1.5 mm to 2.5 mm and is used to place a silicone sealing ring 2224 and facilitate the positioning of the temperature measuring probe 6 .

[0077] In the present invention, the installation channel 2222 is extended along the axial direction of the water inlet and outlet joint 222, and the water inlet and outlet holes 2221 are arranged along the radial direction of the water inlet and outlet joint 222. In this embodiment, the angle between the water inlet and outlet holes 2221 and the installation channel 2222 is between 0° and 90°. The depth of the temperature measuring probe 6 extending into the installation channel 2222 must exceed the water inlet and outlet holes 2221, that is, the position of the water inlet and outlet holes 2221 must be higher than the position of the temperature measuring probe 6 to ensure that the incoming water or outgoing water passes through the temperature measuring probe 6 so as to measure the water temperature.

[0078] Specifically, at the entrance of the installation channel 2222, two pairs of through holes 2225 are provided along the diameter direction thereof, and the hole depth direction of the through holes 2225 is perpendicular to and communicates with the installation channel 2222, and is only used to fix the temperature probe 6, and the temperature probe 6 is fixed in the installation channel 2222 by passing the U-shaped clamp 8 through the two pairs of through holes 2225. An annular mounting platform 61 is provided on the outer peripheral wall of the temperature probe 6, and the temperature probe 6 extends vertically into the installation channel 2222. The annular mounting platform 61 of the temperature probe 6 is placed on the annular fixing platform 2223 inside the installation channel 2222, and a silicone sealing ring 2224 is placed between the annular mounting platform 61 and the annular fixing platform 2223, and the silicone sealing ring 2224 and the annular mounting platform 61 are interference fit. In addition, the water inlet and outlet holes 2221 are provided with two pairs of through holes 2226, which are connected to the water inlet and outlet holes 2221 and are only used to fix the joints of the water inlet and outlet pipes 7, and do not contact the water inlet or outlet. The pair of through holes 2226 are used for the U-shaped clamp 8 to pass through and fix the externally connected water inlet and outlet pipes 7. In addition, a slot 224 is also provided on the outer wall of the cover body 221 of the outer end cover 22, and the slot 224 can be used as a fixing hole for the entire heating tube packaging structure, and a screw is passed through the slot 224 to tighten and position the end closure 2.

[0079] The temperature probe 6 located in the outer end cover 22 is a temperature measuring component with a temperature probe 62 on the top and an annular mounting platform 61 around the periphery. The annular mounting platform 61 can achieve the sealing between the temperature probe 6 and the mounting channel 2222. The top of the temperature probe 6 is provided with a connection 63 for connecting to a power source for heating. The temperature probes 6 located in the end closures 2 at both ends of the housing 1 are responsible for measuring the inlet and outlet water temperatures in the heating tube 3, respectively, and converting them into electrical signals for transmission to the external control circuit board so as to adjust the heating temperature.

[0080] When the temperature probe 6 at the water inlet measures the water inlet temperature, it is converted into a signal and transmitted to the external control circuit board. The control circuit board obtains the power required to heat the water inlet temperature to the target temperature according to the program algorithm. The control circuit board issues an instruction, and the heating tube 3 heats according to the instruction. After heating is completed, the temperature probe 6 at the water outlet measures whether there is a deviation between the outflowing hot water temperature and the target temperature. If there is a deviation, the subsequent water flow in continuous heating will adjust the heating power according to the program algorithm; if the deviation is within the set range, no adjustment will be made.

[0081] Furthermore, a connecting boss 223 is provided between the cover body 221 and the water inlet and outlet joints 222. In this embodiment, the height of the connecting boss 223 is 2.5 mm to 4 mm, and is used to thicken the top of the cover body 221 to enhance the strength of the outer end cover 22 and thus enhance the pressure resistance.

[0082] like Figures 12 to 14As shown, the seal 23 includes a sealing cover plug 232, which has a coaxially arranged outer ring wall 2321 and an inner ring wall 2322, an end wall 2323 is connected between the outer ring wall 2321 and the inner ring wall 2322, and a flow channel 231 is formed in the middle of the inner ring wall 2322. The end of the heating tube 3 can be inserted between the outer ring wall 2321 and the inner ring wall 2322 and abut against the end wall 2323.

[0083] Specifically, the sealing cover plug 232 is made of high temperature resistant food grade silicone material with a hardness of 40° to 70°, and has a ring-shaped nested structure composed of an inner ring wall 2322 and an outer ring wall 2321. The end of the heating tube 3 is inserted into the ring-shaped nested structure. The gap between the inner ring wall 2322 and the outer ring wall 2321 matches the wall thickness of the heating tube 3, and the height of the inner ring wall 2322 is less than the height of the outer ring wall 2321. The inner ring wall 2322 can surround the three convex rods 2215 in the cylinder 2213 of the cover body 221 in the middle, and the diameter of the outer ring wall 2321 matches the inner diameter of the cylinder 2213 in the cover body 221. The function of the sealing cover plug 232 is to ensure that the water entering from the water inlet flows into the heating tube 3 for heating without leakage, or the hot water flowing out of the heating tube 3 can flow out from the water outlet without leakage.

[0084] Furthermore, the outer surface of the outer annular wall 2321 is provided with a plurality of sealing ridges 2324 at intervals along the axial direction of the sealing cover plug 232. When the sealing cover plug 232 is accommodated in the cover body 221 of the outer end cover 22, it can be used to achieve sealing by interference fit with the inner wall of the cylinder 2213 in the cover body 221, thereby improving the sealing of the overall assembly. In addition, an annular ridge 2325 is provided on the outer surface of the end wall 2323, which is also used to achieve sealing by interference fit with the top wall of the cover body 221, thereby improving the sealing of the connection between the outer end cover 22 and the sealing cover plug 232.

[0085] Furthermore, in the present invention, when the guide body 12 is a guide tube with a hollow interior, the sealing member 23 further includes a sealing plug 233, such as Figures 15 to 17 As shown, the sealing plug 233 has a plug body 2331 that can be inserted into the end of the guide tube, and a contact convex ring 2332 arranged on the outer peripheral edge of the plug body 2331, and the contact convex ring 2332 can contact the end surface of the guide tube. In addition, in the cover body 221 of the outer end cover 22, a plurality of convex rods 2215 are protruded from the center of the cylinder 2213 along the circumferential direction. When the sealing plug 233 is inserted into the end of the guide tube, the sealing cover plug 232 is sleeved on the end of the heating tube 3, and the outer end cover 22 is sleeved on the end of the shell 1, the plurality of convex rods 2215 on the outer end cover 22 will extend into the flow passage 231 of the sealing cover plug 232 and contact with the sealing plug 233 to support the sealing plug 233, so as to prevent the heating module from vibrating during use and causing the sealing plug 233 to shake and detach from the guide tube.

[0086] Specifically, the sealing plug 233 is made of high-temperature resistant food-grade silicone material with a hardness of 40° to 70°, and the overall structure is a gyro-shaped structure. The gyro-shaped sealing plug 233 is inserted into the end of the guide tube to play a sealing role, ensuring that water passes through the flow ring cavity 121 around the guide tube and the heating tube 3, and preventing water from entering the guide tube. The sealing plug 233 and the guide body 12 are integral components to achieve flow limiting of the water flow through the heating tube 3, thereby fully heating the water flow. The upper end face of the sealing plug 233 is a circular plane, and a plurality of protrusions 2333 extend around the circular plane. The protrusions 2333 are formed by radially protruding outward from the outer edge of the abutting convex ring 2332. Its function is to limit the degree to which the sealing plug 233 is inserted into the guide tube, and at the same time, the spring sleeved on the guide body 12 is limited and tightened through the protrusions 2333 of the sealing plug 233 to achieve the installation and fixation of the spring, such as Figure 18 and Figure 19 shown.

[0087] Implementation Method 2

[0088] like Figures 1 to 19 As shown, the present invention further provides a heating mechanism, including a heating tube 3 and a heating tube packaging structure as described in the first embodiment, wherein the heating tube 3 is arranged between the outer shell 1 of the heating tube packaging structure and the flow guide 12 .

[0089] In an embodiment of the present invention, the heating tube 3 includes a nano-coated quartz tube and a power-connected metal sheet 31 sleeved on both ends of the nano-coated quartz tube. The present invention improves the withstand voltage of the heating tube 3 as a whole by encapsulating the heating tube packaging structure on the heating tube 3, so that the heating mechanism composed of the heating tube 3 and the heating tube packaging structure has a withstand voltage higher than the withstand voltage of the heating tube 3, which satisfies the high pressure resistance of the heating mechanism and enables it to be widely used in products with high pressure resistance requirements. The present invention effectively solves the problem that the nano-coated quartz tube cannot be used in a pressurized capsule brewing machine, broadens the application field of the nano-film quartz tube, and at the same time, finds a new solution for efficient and rapid heating of the capsule brewing machine.

[0090] Specifically, the nano-coated quartz tube is the heating body of the entire heating mechanism. The two ends of the nano-coated quartz tube are back-silvered by silver paste printing and sintering. The power-connected metal sheet 31 is fixed on the back silver layer at the two ends of the nano-coated quartz tube, and is heated by connecting the two ends to electricity. The power-connected metal sheet 31 is an annular metal hoop with an opening. The annular metal hoop is bent out of two metal sheets at the opening to the outside of the ring. The two metal sheets are respectively provided with a circular hole. The two circular holes are opposite to each other, and screws can pass through them. With the help of nuts, the annular hoop is fixedly attached to the nano-coated quartz tube. At a distance of 1 / 8 to 1 / 4 of the arc length (the arc length of the entire annular hoop) from the opening end, there is an arc surface that is inclined 10° to 30° toward the outside of the ring, forming an annular hoop with an inclined surface at one end. When the opening size is the same, the annular hoop with an inclined surface has a stronger tensioning force than the annular hoop with a regular shape, so that the annular hoop fits the nano-coated quartz tube more tightly and is not easy to loosen.

[0091] The test conditions for the pressure resistance test of the heating mechanism are as follows: static pressure test, no power. The number of samples is 3. The test standard is: the device withstands 2 times the maximum pressure and maintains it for 5 minutes. After the test, the device should not be damaged and can work normally (refer to GB4706.19 Special requirements for safety liquid heaters for household and similar electrical appliances), that is, it can work normally without water leakage after maintaining 30bar for 5 minutes.

[0092] The test method is as follows: Use a manual pressure pump to apply pressure, connect the manual pressure pump to the heating mechanism, and block the water outlet. Press the handle to fill the heating mechanism with water. Continue to press the handle slowly until the pressure gauge reaches 30 bar (kg), and maintain the pressure for 5 minutes. Check whether the sample is leaking after maintaining the pressure. Figure 20 It can be seen that the pressure change process, as the heating mechanism is slowly filled with water and pressurized, the pressure rises to 30bar, and is maintained at 30bar (due to fluctuations in the test instrument, the test pressure fluctuates between 23.43 and 32.56) for 5 minutes. Table 1 shows the test results of the samples after pressurization of 10bar, 20bar, and 30bar. The results show that each test sample can maintain pressure for 5 minutes without leaking under each static load pressure.

[0093] Table 1 Pressure holding test results of three heating mechanisms

[0094] Test pressure 10 bar 20 bar 30 bar 1# Pressure holding test result No leakage in 5 min No leakage in 5 min No leakage in 5 min 2# Pressure holding test result No leakage in 5 min No leakage in 5 min No leakage in 5 min 3# Pressure holding test result No leakage in 5 min No leakage in 5 min No leakage in 5 min

[0095] Implementation Method 3

[0096] The present invention also provides a capsule brewing machine, which includes a brewing machine body and a heating mechanism as described in Embodiment 2 arranged in the brewing machine body. The present invention improves the withstand pressure of the heating tube 3 as a whole by encapsulating the heating tube packaging structure in Embodiment 1 on the heating tube 3, so that the withstand pressure of the heating mechanism in Embodiment 2 composed of the heating tube 3 and the heating tube packaging structure is higher than the withstand pressure of the heating tube 3, which satisfies the high pressure resistance of the heating mechanism, so that it can be widely used in products with high pressure resistance requirements. The present invention has found a new solution for efficient and rapid heating of capsule brewing machines.

[0097] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A heating tube encapsulation structure, characterized in that, the heating tube encapsulation structure includes: a housing having an inner channel capable of accommodating a heating tube, a guiding fluid located inside the heating tube and passing through the inner channel, and an overflow annular cavity formed between the guiding fluid and the heating tube; two end closures respectively plugging both ends of the inner channel, the end closures having water inlet and outlet channels which can communicate with the overflow annular cavity; wherein, the end closure includes: an outer end cover having a cover body sleeved on the end of the housing and a water inlet and outlet joint connected to the cover body; a seal located inside the cover body, the seal being hermetically clamped to the end of the heating tube and the end of the guiding fluid, the seal having an overflow channel, the water inlet and outlet holes of the water inlet and outlet joint, the inner cavity of the cover body and the overflow channel form the water inlet and outlet channels; the seal includes a sealing cover plug, the sealing cover plug having a coaxial outer ring wall and inner ring wall, an end wall connected between the outer ring wall and the inner ring wall, the middle of the inner ring wall forming the overflow channel, and the end of the heating tube being inserted between the outer ring wall and the inner ring wall and abutting against the end wall; the guiding fluid is a hollow guiding tube inside, the seal further includes a plugging block, the plugging block having a plug body capable of inserting into the end of the guiding tube and an abutting convex ring arranged on the outer periphery of the plug body, and the abutting convex ring can abut against the end surface of the guiding tube; wherein, a plurality of convex rods are arranged at intervals in the circumferential direction of the overflow channel inside the cover body of the outer end cover, and the plurality of convex rods extend into the overflow channel and abut against the plugging block; the water inlet and outlet joint of the outer end cover has an installation channel, the water inlet and outlet holes of the water inlet and outlet joint are connected to the overflow channel through the installation channel, a temperature measuring probe can be inserted into the installation channel, and the depth of the temperature measuring probe extending into the installation channel exceeds the water inlet and outlet holes.

2. The heating tube encapsulation structure according to claim 1, characterized in that, a plurality of sealing convex ridges are arranged at intervals on the outer surface of the outer ring wall along the axial direction of the sealing cover plug, and a ring convex ridge is arranged on the outer surface of the end wall.

3. The heating tube encapsulation structure according to claim 1, characterized in that, a connecting convex platform is arranged between the cover body and the water inlet and outlet joint.

4. The heating tube encapsulation structure according to claim 1, characterized in that, a plurality of first sliding channels extending along the axial direction of the housing are arranged on the outer wall of the housing, the plurality of first sliding channels are arranged at intervals in the circumferential direction of the housing, a plurality of connecting holes are arranged on the cover body of the outer end cover, and in the state where the cover body is sleeved on the end of the housing, the plurality of connecting holes can correspond to the plurality of first sliding channels and be connected through connecting pieces.

5. The heating tube encapsulation structure according to claim 4, characterized in that, the housing has an open opening communicating with its inner channel, at least one overload protection mechanism is arranged in the open opening, and at least one overload protection mechanism is arranged opposite to the heating tube.

6. The heating tube encapsulation structure according to claim 5, characterized in that, On the side walls of the housing located on both sides of the open mouth, second sliding channels are respectively provided, the second sliding channels extend along the axial direction of the housing, and the overload protection mechanism is slidably arranged in the second sliding channels.

7. The heating tube encapsulation structure according to any one of claims 4 to 6, characterized in that a semi-closed third sliding channel is provided on the outer wall of the housing, the third sliding channel is located between two adjacent first sliding channels, and a threading pipe can be clamped in the third sliding channel.

8. The heating tube encapsulation structure according to claim 5, characterized in that the overload protection mechanism is a temperature sensor.

9. The heating tube encapsulation structure according to claim 1, characterized in that a flow disturbing member is provided in the overcurrent ring cavity.

10. The heating tube encapsulation structure according to claim 9, characterized in that the flow disturbing member is a spring, and the spring is sleeved on the fluid guide.

11. The heating tube encapsulation structure according to claim 10, characterized in that the fluid guide is a hollow guide tube inside.

12. The heating tube encapsulation structure according to claim 1 or 9, characterized in that the distance between the fluid guide and the heating tube is 0.5 mm to 1.5 mm.

13. A heating mechanism, characterized in that it includes a heating tube and the heating tube encapsulation structure according to any one of claims 1 to 12, and the heating tube is arranged between the housing and the fluid guide of the heating tube encapsulation structure.

14. The heating mechanism according to claim 13, characterized in that the heating tube includes a nano-coated quartz tube and electrical connection metal sheets sleeved at both ends of the nano-coated quartz tube.

15. A capsule brewing machine, characterized in that the capsule brewing machine includes a brewing machine body and the heating mechanism according to any one of claims 13 to 14 arranged in the brewing machine body.

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