WO2016192685A1 - 一种便携式蒸汽发生器 - Google Patents

一种便携式蒸汽发生器 Download PDF

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Publication number
WO2016192685A1
WO2016192685A1 PCT/CN2016/084881 CN2016084881W WO2016192685A1 WO 2016192685 A1 WO2016192685 A1 WO 2016192685A1 CN 2016084881 W CN2016084881 W CN 2016084881W WO 2016192685 A1 WO2016192685 A1 WO 2016192685A1
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WIPO (PCT)
Prior art keywords
heat exchange
heat
exchange tube
water
tube
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PCT/CN2016/084881
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English (en)
French (fr)
Inventor
何锡欢
卢庆云
Original Assignee
何锡欢
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Publication date
Priority claimed from CN201520378516.XU external-priority patent/CN204902655U/zh
Priority claimed from CN201520871075.7U external-priority patent/CN205118993U/zh
Application filed by 何锡欢 filed Critical 何锡欢
Publication of WO2016192685A1 publication Critical patent/WO2016192685A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/30—Electrode boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/16—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled

Definitions

  • the present invention relates to the field of steam generators, and more particularly to a portable steam generator.
  • the steam generators on the market are generally large in size and need to be equipped with a dedicated and complicated steamer to be used, and these devices are only suitable for use in restaurants or hotel kitchens, and occupy a large space when used.
  • the technical problem to be solved by the present invention is to provide a portable steam generator which increases the heating time by setting the heat exchange tubes in a spiral shape, thereby increasing the heating time of water and water vapor in the water vapor passage, and can save space.
  • the present invention provides a portable steam generator including a casing, a heat exchange tube disposed in the casing, and a heat pipe disposed in the casing for heating the heat exchange pipe, the heat exchange pipe set There is a water vapor passage, and two ends of the water vapor passage are respectively provided with a water inlet port and an steam outlet port, wherein the heat exchange tube is gradually inwardly turned from the one end of the water inlet port and is spiraled into a large and small spiral shape, or The heat exchange tube is gradually outwardly and upwardly turned from the end of the steam outlet to a large spiral shape.
  • the steam outlet is provided at the spiral center of the spiral heat exchange tube.
  • the heat generating tube includes an arc-shaped heat generating portion provided at the bottom of the casing and two power terminals extending from both end portions of the arc-shaped heat generating portion to the outside of the casing.
  • the heat pipe is provided with two first heat-generating tubes and a second heat-generating tube, and the arc-shaped heat-generating portion of the first heat-generating tube surrounds the arc-shaped heat-generating portion of the second heat-generating tube
  • the two power terminals of the second heat pipe are located between the two power terminals of the first heat pipe.
  • the heat transfer cast aluminum body is further included, and the heat transfer cast aluminum body melts the heat exchange tube and the heat pipe into a unitary structure.
  • the heat exchange tube is provided with a pressure relief valve at a portion of the water inlet and/or the steam outlet.
  • the length of the heat exchange tubes is 1-6 m.
  • the diameter of the largest arc of the heat transfer tube on the horizontal projection surface is less than 50 cm.
  • the difference in height of the heat exchange tubes located in the casing is greater than twice the outer diameter of the heat exchange tubes.
  • a spring strip is disposed in the water vapor passage, and the spring strip generates thermal expansion and contraction phenomenon as the temperature in the water vapor passage changes;
  • the heat exchange tube is obtained by the following method:
  • the spring strip is inserted into the water vapor passage from one end of the heat exchange tube, and then the heat exchange tube provided with the spring strip is bent inwardly from the end of the water inlet through the bender to make the heat exchange tube
  • the upper and lower small spirals, the length and outer diameter of the spring strip are adapted to the length and inner diameter of the heat exchange tube.
  • the gap between the inner wall of the heat exchange tube and the spring strip is 0.5-2 mm before the heat exchange tube is subjected to the bending forming process.
  • the inner diameter of the heat exchange tube ranges from 6 to 30 mm; the diameter of the spring strip ranges from 1 to 3 mm, and the wall thickness of the heat exchange tube ranges from 0.6 to 2.5 mm.
  • the improvement of the above solution further includes a heat dissipation water pipe, the outer surface of the casing is wrapped with a heat insulation layer, and the heat dissipation water pipe is disposed inside the heat insulation layer or on an outer surface of the heat insulation layer;
  • the water inlet of the heat dissipation water pipe is connected to an external water source, and the water outlet of the heat dissipation water pipe is in communication with the water inlet of the heat exchange pipe.
  • the heat exchange tube of the present invention has a spiral shape which is large and small, that is, the outer diameter of the upper and lower spirals is gradually reduced. At this time, there is a position difference between the upper and lower spirals, and the lower heat exchange tube does not affect the upper layer.
  • the lower surface of the heat exchange tube is heated, so that the heat of each layer of the heat exchange tube can be fully heated, and the water in the water vapor passage and the heat of the water vapor are increased;
  • the heat exchange tube of the present invention is arranged in a spiral shape with a large upper and a small shape, and has high space utilization rate, and can ensure that water becomes water vapor in the water vapor passage at a small height, and the steam generator is small in volume. Easy to carry;
  • the invention provides the water inlet at the upper end and the steam outlet at the lower end. Since the water vapor flows upward in a natural state, if the steam outlet is provided at the upper end, the water vapor will be sprayed very quickly.
  • the invention provides that the steam outlet is arranged at the lower end, and the water enters from the water inlet of the upper end. At this time, the upper water plays a certain blocking effect on the water vapor in the lower part, and conversely, the water vapor generates a flow to the water.
  • the upward resistance can increase the time for water and water vapor to flow in the water vapor channel, that is, increase the time during which the water and water vapor are heated in the water vapor channel, so that the water in the water vapor channel can be further heated by the water vapor. And finally discharged;
  • the thermal energy of the upper part of the casing is relatively low, the heat energy of the lower center is relatively high, the water inlet is located at the upper end, the air outlet is located at the middle or the middle of the lower part, and the water entering by the water inlet first passes relatively weak.
  • the heat energy is preheated, and as the water in the water vapor passage flows along the spiral heat exchange tube, the heat energy becomes stronger and stronger, and the water can be completely turned into water vapor before the water exits the steam outlet, by changing the heating power and the water intake amount.
  • the length of the water vapor channel it can well regulate the steam output and temperature of the steam to achieve cooking or other application functions.
  • Figure 1 is a schematic view showing the structure of a portable steam generator of the present invention
  • Figure 2 is a plan view of Figure 1;
  • Figure 3 is a cross-sectional view of Figure 2 taken along the line AA;
  • Figure 4 is a cross-sectional view showing the heat exchange tube of the present invention in a straight state
  • Figure 5 is a partial enlarged view of B in Figure 4.
  • Figure 6 is a front elevational view showing the heat exchange tube of the present invention in a straight line state
  • Figure 7 is a partial structural schematic view showing an embodiment of the steam generator of the present invention after adding a heat insulating layer and a heat dissipation water pipe;
  • Fig. 8 is a partial structural schematic view showing another embodiment of the steam generator of the present invention after adding an insulating layer and a heat-dissipating water pipe.
  • the present invention discloses a portable steam generator including a casing 1 , a heat exchange tube 2 disposed in the casing 1 , and a heat exchange tube 2 disposed in the casing 1 .
  • Heat pipe 31, 32).
  • the heat exchange tube 2 is provided with a water vapor passage 21, and two ends of the water vapor passage 21 are respectively provided with a water inlet 2a and an outlet port 2b, and the heat exchange tube 2 is gradually inward and downward from one end of the water inlet 2a.
  • the disk is formed into a large spiral shape, or the heat exchange tube 2 is gradually outwardly and upwardly turned from the end of the steam outlet 2b into a spiral shape which is large and small.
  • the water in the water vapor passage 21 is heated to become steam, and then ejected from the steam outlet 2b.
  • the present invention sets the water inlet 2a at the upper end and the steam outlet 2b at the lower end due to water vapor. In the natural state, it flows upward. If the steam outlet 2b is provided at the upper end, the water vapor will be quickly ejected.
  • the steam outlet 2b is disposed at the lower end, and the water enters from the upper water inlet 2a. At this time, the upper portion The water acts as a barrier to the lower water vapor.
  • the water vapor creates an upward resistance to the flow of water, which increases the time it takes for water and water vapor to flow within the water vapor channel 21, ie, increasing water and water.
  • the time during which the steam is heated in the water vapor passage 21 is such that all of the water in the water vapor passage 21 becomes water vapor and then discharged.
  • the invention heats the heat exchange tube 2 into a spiral shape which is large and small, that is, the outer diameter of the upper and lower spirals is gradually reduced. At this time, there is a position difference between the spirals of the upper and lower layers, and the heat exchange tube 2 of the lower layer does not affect.
  • the lower surface of the upper heat exchange tube 2 is heated, so that the heat exchange around the heat exchange tubes 2 can be sufficiently heated, the water in the water vapor passage 21 and the heat of the water vapor are increased, and the heat exchange tubes 2 are set up.
  • the large and small spiral shape has high space utilization rate, and at a small height, the water can be turned into water vapor in the water vapor passage 21 to realize the portability of the steam generator, and the upper portion of the casing 1
  • the heat energy is relatively low
  • the heat energy of the lower center is relatively high
  • the water inlet 2a is set at the upper end
  • the steam outlet 2b is located at the middle or the middle of the lower portion
  • the water entering by the water inlet 2a is firstly pre-treated by the relatively weak heat energy.
  • Heat as the water in the water vapor passage 21 flows along the spiral heat exchange tube 2, the heat energy becomes stronger and stronger, and the water can be completely turned into water vapor before the steam outlet 2b is ejected, and the temperature of the water vapor is high. Can achieve good cooking or other work .
  • the steam outlet 2b is preferably disposed at the center of the spiral of the spiral heat exchange tube 2, that is, the center position of the spiral projection.
  • the heat exchange tubes 2 of each layer after being projected to the horizontal plane are shown. There is a certain horizontal distance between them.
  • the heat exchange tubes 2 can be sufficiently heated, and the horizontal distance of each layer of the heat exchange tubes 2 can be fully utilized to further reduce the volume of the steam generator, of course, the steam outlet. 2b It can also be placed near the center of the spiral.
  • the present invention is provided with a convex connecting portion at the steam outlet 2b for guiding the water vapor of the steam outlet 2b into the external structure.
  • the heat pipe (31, 32) is used to heat the heat exchange tube 2, and heat is transferred to the water and water vapor in the water vapor passage 21 through the heat exchange tube 2, and the heat generating tube (31, 32) preferably includes a shell.
  • the arc-shaped heat generating portion (31a, 32a) at the bottom of the body 1 and the two end portions of the arc-shaped heat generating portion (31a, 32a) extend to the two power supply terminals (31b, 32b) outside the casing, and the power supply terminal (31b) , 32b) can be pierced from the horizontal or oblique direction of the housing, or set as a vertical portion as shown in the drawing, that is, the power supply terminals (31b, 32b) are disposed at the outermost side of the heat exchange tube 2, in such a manner Is the preferred way.
  • the heat exchange tubes 2 are located above the arc-shaped heat generating portions (31a, 32a), and the heat is uniformly transferred from the bottom of the casing 1 through the arc-shaped heat generating portions (31a, 32a) of the heat generating tubes (31, 32).
  • the power supply terminals (31b, 32b) are portions where the heat pipes (31, 32) communicate with the external power source.
  • the heat generating tubes (31, 32) are provided with two, respectively a first heat generating tube 31 and a second heat generating tube 32, and the arc-shaped heat generating portion 31a of the first heat generating tube 31 surrounds the second The arc-shaped heat generating portion 32a of the heat-generating tube 32, the two power-supply terminals 32b of the second heat-generating tube 32 are located between the two power-supply terminals 31b of the first heat-generating tube 31, and the two heat-generating tubes (31, 32)
  • the arc-shaped heat generating portions (31a, 32a) are arranged in an inner and outer structure, so that the heat distribution in the casing 1 can be better achieved.
  • the invention can realize the water in the water vapor passage 21 into water vapor through the two heat-generating tubes (31, 32).
  • the heat-generating tubes can be one, two or even more. Only two articles are specifically described.
  • the arc of the arc-shaped heat-generating portion of the heat-generating tube is gradually reduced, and is gradually surrounded.
  • a heat transfer cast aluminum body is further included, and the heat transfer cast aluminum body melts the heat exchange tube and the heat generating tube into a one-piece structure, and the heat transfer performance of the cast aluminum is better, and the present invention
  • the heat exchange tube 2 of the present invention is provided with a pressure relief valve 4 at a position of the water inlet 2a and/or the steam outlet 2b, and the pressure relief valve 4 Set the appropriate pressure value for cooking.
  • the pressure relief valve 4 When the pressure is too high, the pressure relief valve 4 is opened, the excess steam can be discharged, and the steam generator can be safely used to avoid excessive pressure. It affects the taste of cooking food, and even causes major events such as explosions.
  • the length of the heat exchange tube 2 of the present invention is 1-6 m, and the heat exchange tube 2 of this length is spirally processed into a spiral shape which is large and small, and the maximum arc of the heat exchange tube 2 after processing is on the horizontal projection surface.
  • the diameter i.e., the arc portion introduced by the water inlet 2a, that is, the outermost arc portion
  • the height difference of the heat exchange tubes 2 located in the casing 1 is greater than twice the outer diameter of the heat exchange tubes. .
  • the existing steam generator generally uses the corrugated heat exchange tube 2 for heat transfer, but the existing corrugated heat exchange tube has at least the following disadvantages:
  • the wall of the corrugated heat exchange tube is thin, resulting in low pressure resistance and easy breakage;
  • the wall of the corrugated heat exchange tube is threaded, the inner wall is relatively smooth, and the water flow speed is relatively fast. Therefore, a long corrugated heat exchange tube is required to fully heat the water and steam, increase the space use area, and increase the use cost. Increase the uncertainty of perforation or rupture;
  • the existing heat exchange tubes will be provided with some deceleration components inside, but complex structures are required to fix the deceleration components, resulting in a complicated overall structure;
  • the corrugated heat exchange tube is prone to scale after long-term use. Since the corrugation of the bellows is convex outward, and the bellows is heated or cooled, the corrugation spacing is fixed, when the scale adheres to the relatively static pipeline. The inner wall is not easy to fall off. Over time, it will eventually block the pipeline, so it is necessary to carry out chemical cleaning at regular intervals.
  • the present invention adopts the following technical solutions.
  • the water vapor channel 21 is provided with a spring strip 5, and the spring strip 5 generates thermal expansion and contraction phenomenon as the temperature in the water vapor passage 21 changes.
  • the spring strip 5 of the present invention is a common spiral structure. At this time, in combination with the relatively high elasticity and the spiral structure of the spring strip 5, the change of the movement of the spring strip 5 is relatively large, and the wire diameter, the spiral diameter and the pitch of the spring strip 5 are changed, that is, the diameter of the spring strip 5 Both expansion and contraction occur in both the longitudinal direction and the longitudinal direction. At this time, the scale removal can be achieved.
  • the diameter of the spring strip 5 is the diameter of the spring wire used for the spring strip 5, and the spiral diameter of the spring strip 5 is the spring strip 5
  • the temperature inside the heat exchange tube 2 rises, that is, the spring strip 5 is thermally expanded.
  • the scale on the surface of the spring strip 5 is broken due to the expansion of the spring strip 5, when the heat exchange tube 2 is stopped.
  • the temperature inside the heat exchange tube 2 is gradually lowered, and the spring strip 5 is cooled and contracted.
  • the scale on the surface of the spring strip 5 is separated from the spring strip 5 by the contraction of the spring strip 5, and in addition, the spring strip 5 is inflated and contracted.
  • the spring strip 5 also has a certain expansion and contraction along the length direction of the heat exchange tube 2, which can further prevent the accumulation of scale and ensure the cleanliness in the heat exchange tube 2, and use In the steam generator of the present invention, it is allowed to work for a period of time to discharge the scale in the water vapor passage 21, and then used for cooking or other purposes to prevent scale from entering the steamer.
  • the heat exchange tube 2 is made of 304 stainless steel or 316 stainless steel
  • the spring strip 5 is made of 304 stainless steel or 316 stainless steel
  • the heat exchange tube 2 and the spring strip 5 are made of 304 stainless steel or 316 stainless steel. Effectively prevent the inner wall of the heat exchange tube 2 and the spring strip 5 from being corroded due to long-term operation, thereby avoiding the sanitation of water vapor due to corrosion dissolution and peeling.
  • the heat exchange tube 2 is obtained by the following method:
  • the spring strip 5 is sleeved into the water vapor passage 21 from one end of the heat exchange tube 2, and then the heat exchange tube 2 provided with the spring strip 5 is bent inwardly and downwardly from the end of the water inlet 2a by a bender.
  • the length and outer diameter of the spring strip 5 are matched with the length and inner diameter of the heat exchange tube 2.
  • the specific length and inner diameter of the heat exchange tube 2 are determined by the application site and use of the steam generator. When the steam generator is large and the required water flow rate is also large, the length and inner diameter of the heat exchange tube 2 are relatively large. The length and outer diameter of the spring strip 5 are relatively large, and instead, the spring strip 5 of relatively small length and outer diameter is selected.
  • the gap L between the inner wall of the heat exchange tube 2 and the spring strip 5 is preferably 0.5-2 mm, and the gap between the heat exchange tube 2 and the spring strip 5 is controlled at 0.5-2 mm. , to ensure that the spring strip 5 does not affect the subsequent bending forming process of the heat exchange tube 2, and set a certain gap between the heat exchange tube 2 and the spring strip 5, and reserve a certain amount for the thermal expansion and contraction of the heat exchange tube 2 and the spring strip 5.
  • the spring strip 5 is placed in the water vapor passage 21. At this time, the spring strip 5 will move relative to the heat exchange tube 2. If the structure is stable, it needs to be connected by providing a connecting structure or other connecting members, and the present invention passes the curved tube.
  • the heat exchange tube 2 provided with the spring strip 5 is bent and formed, and the spring strip 5 placed in the heat exchange tube 2 is also bent along with the heat exchange tube 2. At this time, the spring strip 5 is not easily bent due to the structure. The phenomenon of displacement can play a very good stabilizing effect.
  • the spring strip 5 does not need to be connected by other connecting members, and the heat exchange tube 2 of the present invention has a simple structure and simple processing, and the water flow in the water vapor passage 21 does not. Under the influence of other connecting members, it should be noted that the spring strip 5 of the present invention can still have a small moving range.
  • the invention is heated by the water in the spiral strip lengthening water vapor passage 21 of the spring strip 5 and the heat exchange tube 2 Specifically, when the water flow in the water vapor passage 21 passes through the spring strip 5, it is blocked by the spring strip 5, the water flow speed is slowed, and the time during which the water is heated in the heat exchange tube 2 is also increased, and further, the spring strip 5 is passed.
  • the heat exchange tube 2 can realize a long water vapor passage 21 path in a small space, can increase the time of water heating, facilitate the generation of water vapor, and the spiral heat exchange tube 2 can reduce the flow rate of the water therein.
  • the present invention combines the spiral shape of the spring strip 5 and the spiral shape of the heat exchange tube 2 to obtain the longest heating time of the water in the water vapor passage 21, thereby ensuring that the water in the water vapor passage 21 can be heated into Water vapor, and let the water vapor continue to heat up, reach the set temperature and then eject through the steam outlet 2b.
  • both ends of the heat exchange tube 2 are provided with a constricted portion, the inner diameter of the constricted portion is smaller than the outer diameter of the spring strip 5, and the spring strip 5 is prevented from slipping out of the heat exchange tube 2 due to special circumstances through the constricted portion.
  • the neck portion of the present invention is produced by a pipe shrinking machine, and the shrinking process is performed after the spring strip 5 is inserted into the water vapor passage 21 and before the heat exchange tube 2 is subjected to the bending forming process. The accidental situation that the spring strip 5 slips down during the bending forming process can be prevented.
  • the welding process of the heat exchange tube 2 and other structures is removed.
  • the present invention is provided with connecting threads 22 at both ends of the heat exchange tube 2, and the threaded connection structure is simple and replaceable.
  • the inner diameter D1 of the heat exchange tube 2 is preferably in the range of 6-30 mm, and the inner diameter of the heat exchange tube 2 is too small, which is unfavorable for the discharge of scale impurities, and the inner diameter of the heat exchange tube 2 is too large, and the production site and the processing machine are relatively high. And the manufacturing cost is high, since the range of the gap L between the spring strip 5 and the heat exchange tube 2 is determined, and the range of the wall thickness of the heat exchange tube 2 is determined, the range of the outer diameter D2 of the spring strip 5 is also determined;
  • the inner diameter of the tube 2 is preferably in the range of 6-30 mm, and the diameter of the spring strip 5 is preferably 1-3 mm.
  • the diameter of the spring strip 5 is the diameter of the spring wire used to make the spring strip 5, and the line of the spring strip 5 is used. When the diameter is in this range, the spring strip 5 can play a better role in blocking the water flow speed. If the wire diameter of the spring strip 5 is too small, the water flow can not be blocked, and if the wire diameter of the spring strip 5 is too large, It has a great impact on the processing difficulty and cost.
  • the wall thickness of the heat exchange tube 2 is preferably in the range of 0.6-2.5 mm.
  • the heat-resistant tube 2 has a large withstand voltage and is not prone to cracking. If it is lower than this range, the heat-exchange tube 2 may be too thin to occur easily. The rupture phenomenon, if it is higher than this range, the heat transfer tube 2 will be too thick to be easily processed.
  • the invention combines the inner diameter D1 range of the heat exchange tube 2, the tube wall thickness range of the heat exchange tube 2, and the spring strip 5
  • the wire diameter range and the gap range L between the heat exchange tube 2 and the spring strip 5 ensure that the flow rate of water and water vapor in the heat exchange tube 2 is relatively slow, and the water and water vapor in the water vapor passage 21 are sufficiently heated. And when the heat exchange tube 2 of the present invention is in this combination range, better scale removal can be achieved.
  • the present invention can also appropriately adjust the above various ranges depending on the size of the steam generator and the application environment, and is not limited to the scope of the present invention.
  • the present invention encloses an insulating layer 6 on the outer surface of the casing, and reduces heat loss in the casing through the heat insulating layer 6.
  • the heat dissipation water pipe is disposed inside the heat insulating layer or on the heat insulating layer.
  • the outer surface of the heat pipe may be spirally disposed at the bottom, the side or the bottom and the side, and the heat pipe may have various forms.
  • the present invention communicates the water inlet of the heat dissipation water pipe 7 with an external water source, the water outlet of the heat dissipation water pipe 7 communicates with the water inlet of the heat exchange pipe, and the water inside the heat dissipation water pipe 7 is absorbed into the heat insulation layer 6 The excess heat is sent to the heat exchange tube, which realizes the reuse of heat and improves energy utilization.
  • a heat-dissipating water pipe 7 is disposed inside or outside the heat insulating layer 6. Since the water inlet of the heat-dissipating water pipe 7 communicates with an external water source, the temperature of the external water source relative to the heat insulating layer 6 is low, and the heat-dissipating water pipe 7 and the flowing water therein are Absorbing the excess heat of the heat insulating layer 6 can effectively prevent the components and circuits between the outside of the steam generator and the inside of the body from being burnt out due to excessive temperature.
  • FIG. 7 and FIG. 8 are mainly for expressing the structure of the heat insulating layer 6 and the heat dissipation water pipe 7, and do not limit the structure of other components.

Abstract

一种便携式蒸汽发生器，包括壳体（1）、设于壳体（1）内的换热管（2）以及设于壳体（1）内用于加热换热管（2）的发热管（31，32），换热管（2）设有水汽通道（21），水汽通道（21）的两端分别设有进水口（2a）和出汽口（2b），换热管（2）由进水口（2a）的一端逐渐向内并向下盘成上大下小的螺旋状，或者，换热管（2）由出汽口（2b）一端逐渐向外并向上盘成上大下小的螺旋状。此时，上下层螺旋之间有一个位置差，下层的换热管（2）不会影响上层换热管（2）的下表面受热，可以使每层换热管（2）的四周都能够得到充分的受热，增加水汽通道（21）内的水以及水转化成的水蒸汽的受热温度。另外，将进水口（2a）设于上端，将出汽口（2b）设于下端，可以增加水和水蒸汽在水汽通道（21）内流动的时间，即增加水和水蒸汽在水汽通道内（21）加热的时间。

Description

一种便携式蒸汽发生器 技术领域
本发明涉及蒸汽发生器领域，尤其涉及一种便携式蒸汽发生器。
背景技术
市面上的蒸汽发生器一般体积比较大，且需要配上专用且结构复杂的蒸具才能使用，而且这些装置只适用餐厅或酒店厨房使用，使用时要占据较大的空间。现需要一种既适用于酒楼餐厅又适用于一般家庭的结构简单轻巧、形状时尚、使用方便的蒸汽发生器，以满足现代人对饮食的更高更快捷的需求。
发明内容
本发明所要解决的技术问题在于，提供一种便携式蒸汽发生器，通过将换热管设置成螺旋状，增加水汽通道内水以及水蒸汽的加热路径，从而增加加热时间，并且可以节省空间。
为了解决上述技术问题，本发明提供了一种便携式蒸汽发生器，包括壳体、设于壳体内的换热管以及设于壳体内用于加热换热管的发热管，所述换热管设有水汽通道，所述水汽通道的两端分别设有进水口和出汽口，所述换热管由进水口的一端逐渐向内并向下盘成上大下小的螺旋状，或者，所述换热管由出汽口一端逐渐向外并向上盘成上大下小的螺旋状。
作为上述方案的改进，所述出汽口设于螺旋状换热管的螺旋中心。
作为上述方案的改进，所述发热管包括设于壳体底部的弧形发热部以及由弧形发热部的两个端部延伸至壳体外的的两个电源接线端。
作为上述方案的改进，所述发热管设有两个，分别为第一发热管和第二发热管，所述第一发热管的弧形发热部包围所述第二发热管的弧形发热部，所述第二发热管的两个电源接线端位于第一发热管的两个电源接线端之间。
作为上述方案的改进，还包括传热铸铝体，所述传热铸铝体将换热管和发热管熔铸为一体式结构。
作为上述方案的改进，所述换热管位于进水口和/或出汽口的部位设有泄压阀。
作为上述方案的改进，所述换热管的长度为1-6m。
作为上述方案的改进，所述换热管在水平投影面的最大圆弧的直径小于50cm。
作为上述方案的改进，位于所述壳体内的换热管的高度差大于换热管外径的两倍。
作为上述方案的改进，所述水汽通道内设有弹簧条，随着水汽通道内温度变化，所述弹簧条产生热胀冷缩现象；
所述换热管通过如下方法制得：
首先将弹簧条由换热管的一端套入水汽通道内，然后通过弯管机将设有弹簧条的换热管由进水口的一端向内并向下进行弯曲成型加工以使换热管呈上大下小的螺旋状，所述弹簧条的长度和外径与所述换热管的长度和内径相适配。
作为上述方案的改进，所述换热管在进行弯曲成型加工之前，所述换热管的内壁与弹簧条之间的间隙为0.5-2mm。
作为上述方案的改进，所述换热管的内径范围为6-30mm；所述弹簧条的线径范围为1-3mm，所述换热管的管壁厚度范围为0.6-2.5mm。
作为上述方案的改进，还包括散热通水管，所述壳体的外表面包裹有保温层，所述散热通水管设于所述保温层的内部或者设于所述保温层的外表面；所述散热通水管的入水口与外部水源连通，所述散热通水管的出水口与换热管的进水口连通。
作为本发明的优选实施方式，
实施本发明的实施例，具有如下有益效果：
1、本发明的换热管为上大下小的螺旋状，即由上至下螺旋外径逐渐缩小，此时，上下层螺旋之间有一个位置差，下层的换热管不会影响上层换热管的下表面受热，可以使每层换热管的四周都能够得到充分的受热，增加水汽通道内的水以及水蒸汽的受热度；
2、本发明的换热管设置成上大下小的螺旋状，其空间利用率高，在较小高度的情况下也能保证水在水汽通道内变成水蒸汽，蒸汽发生器的体积小，便于携带；
3、本发明将所述进水口设于上端，将所述出汽口设于下端，由于水蒸汽在自然状态下是向上流动的，如果将出汽口设于上端，水蒸汽会很快喷出，本发明将出汽口设于下端，水由上端的进水口进入，此时，上部的水对下部的水蒸汽起到一定的阻隔作用，反过来，水蒸汽会对水的流动产生一个向上的阻力，可以增加水和水蒸汽在水汽通道内流动的时间，即增加水和水蒸汽在水汽通道内加热的时间，以使水汽通道内的水全部变成水蒸汽后还可以继续受热升温，最后排出；
4、壳体的上部的热能相对较低，下部中心的热能相对较高，将进水口设于上端，出气口设于下方的中间或者中间附近，由进水口进入的水首先通过相对较弱的热能进行预热，随着水汽通道内的水沿着螺旋换热管的流动，热能越来越强，水在喷出出汽口之前可以实现全部变成水蒸汽，通过改变发热功率、进水量以及水汽通道的长度，能够很好的调节蒸汽的出汽量及温度高低，达到蒸煮或者其它应用功能。
附图说明
图1是本发明便携式蒸汽发生器的结构示意图；
图2是图1的俯视图；
图3是图2沿AA方向的剖视图；
图4是本发明的换热管处于直线状态时的剖视图；
图5是图4中B处的局部放大图；
图6是本发明的换热管处于直线状态时的正面示意图；
图7是本发明的蒸汽发生器增加保温层和散热通水管后的一种实施方式的部分结构示意图；
图8是本发明的蒸汽发生器增加保温层和散热通水管后的另一种实施方式的部分结构示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述。仅此声明，本发明在文中出现或即将出现的上、下、左、右、前、后、内、外等方位用词，仅以本发明的附图为基准，其并不是对本发 明的具体限定。
参见附图1至附图8，本发明公开了一种便携式蒸汽发生器，包括壳体1、设于壳体1内的换热管2以及设于壳体1内用于加热换热管2的发热管(31、32)。
所述换热管2设有水汽通道21，所述水汽通道21的两端分别设有进水口2a和出汽口2b，所述换热管2由进水口2a的一端逐渐向内并向下盘成上大下小的螺旋状，或者，所述换热管2由出汽口2b一端逐渐向外并向上盘成上大下小的螺旋状。
水汽通道21内的水经过加热后变成水蒸汽，然后由出汽口2b喷出，本发明将所述进水口2a设于上端，将所述出汽口2b设于下端，由于水蒸汽在自然状态下是向上流动的，如果将出汽口2b设于上端，水蒸汽会很快喷出，本发明将出汽口2b设于下端，水由上端的进水口2a进入，此时，上部的水对下部的水蒸汽起到一定的阻隔作用，反过来，水蒸汽会对水的流动产生一个向上的阻力，可以增加水和水蒸汽在水汽通道21内流动的时间，即增加水和水蒸汽在水汽通道21内加热的时间，以使水汽通道21内的水全部变成水蒸汽后再排出。
本发明将换热管2盘成上大下小的螺旋形，即由上至下螺旋外径逐渐缩小，此时，上下层螺旋之间有一个位置差，下层的换热管2不会影响上层换热管2的下表面受热，可以使每层换热管2的四周都能够得到充分的受热，增加水汽通道21内的水以及水蒸汽的受热度，并且将换热管2设置成上大下小的螺旋状，其空间利用率高，在较小高度的情况下也能保证水在水汽通道21内变成水蒸汽，实现蒸汽发生器的便携性，另外，壳体1的上部的热能相对较低，下部中心的热能相对较高，将进水口2a设于上端，出汽口2b设于下方的中间或者中间附近，由进水口2a进入的水首先通过相对较弱的热能进行预热，随着水汽通道21内的水沿着螺旋换热管2的流动，热能越来越强，水在喷出出汽口2b之前可以实现全部变成水蒸汽，并且水蒸汽的温度高，能够很好的实现蒸煮或者其它功能。
优选的，所述出汽口2b优选设于螺旋状换热管2的螺旋中心，即螺旋投影的中心位置，从附图2中可以看出，投影到水平面后的每层的换热管2之间有一定的水平距离，此时，换热管2能够得到充分的加热，并且每层换热管2的水平距离能够得到充分的利用，进一步减小蒸汽发生器的体积，当然出汽口2b 也可以设于螺旋中心附近的位置。为了便于换热管2的出汽口2b与外界连通，本发明在出汽口2b设有上凸的连接部，连接部用于将出汽口2b的水蒸汽引导至外部结构内。
所述发热管(31、32)用于加热换热管2，将热量通过换热管2传递到水汽通道21内的水和水蒸汽，所述发热管(31、32)优选包括设于壳体1底部的弧形发热部(31a、32a)以及由弧形发热部(31a、32a)的两个端部延伸至壳体外的两个电源接线端(31b、32b)，电源接线端(31b、32b)可以从壳体中水平或者倾斜方向穿出，或者像附图中显示的设置成竖直部，即电源接线端(31b、32b)设于换热管2的最外侧，此种方式为优选方式。
此时，换热管2位于弧形发热部(31a、32a)的上方，通过发热管(31、32)的弧形发热部(31a、32a)将热量均匀的由壳体1的底部向上传递到换热管2，电源接线端(31b、32b)为发热管(31、32)与外部电源连通的部位。
作为优选方案，所述发热管(31、32)设有两个，分别为第一发热管31和第二发热管32，所述第一发热管31的弧形发热部31a包围所述第二发热管32的弧形发热部32a，所述第二发热管32的两个电源接线端32b位于第一发热管31的两个电源接线端31b之间，将两个发热管(31、32)的弧形发热部(31a、32a)设置成一内一外的结构，可以较好的实现壳体1内热量的均匀分布。本发明通过两个发热管(31、32)可较好的实现将水汽通道21内的水变成水蒸汽，根据应用环境的要求不同，发热管可以是1条、2条甚至更多，本文仅以2条作具体说明，当发热管多于2条时，发热管的弧形发热部的弧度逐渐缩小，呈逐渐包围的形态。
为了便于本发明便携式蒸汽发生器的定位，还包括传热铸铝体，所述传热铸铝体将换热管和发热管熔铸为一体式结构，铸铝的传热性能较好，本发明也可以将所述壳体1、发热管(31、32)和换热管2通过铸铝浇注成一体式结构(增加壳体1部分)，由于铝的散热效果比较好，通过铸铝将各个部件固定在一起可以防止由于蒸汽发生器内部过热导致的损坏。
为了保证本发明的蒸汽发生器能够达到一定的压力并且能够保证安全使用，本发明的换热管2位于进水口2a和/或出汽口2b的部位设有泄压阀4，泄压阀4设定适宜的用于蒸煮的压力值，当压力过高时，泄压阀4打开，可以将多余的蒸汽排出，并且可以保证蒸汽发生器能够安全使用，以免发生压力过高， 影响蒸煮食物的口感，甚至是产生爆炸等重大事件。
本发明所述换热管2的长度为1-6m，将此长度的换热管2进行盘旋加工成上大下小的螺旋状，加工后的换热管2在水平投影面的最大圆弧的直径(即由进水口2a引入的圆弧部分，也即最外侧的圆弧部分)小于50cm，位于所述壳体1内的换热管2的高度差大于换热管外径的两倍。
需要说明的是，现有的蒸汽发生器一般使用波纹换热管2进行热量的传递，但是现有的波纹换热管至少具有以下缺点：
1、波纹换热管的管壁较薄，导致其耐压低、易破裂；
2、波纹换热管虽然管壁呈螺纹型，但是内壁比较平顺，水流速度还是比较快，从而需要很长的波纹换热管才能使水及蒸汽充分受热，增加空间使用面积，提高使用成本，增加穿孔或破裂的不确定因素；
3、现有换热管为了减缓其管内水流的速度，会在内部设置一些减速部件，但是需要复杂的结构固定减速部件，导致整体结构复杂；
4、波纹换热管在长期使用后容易产生水垢，由于波纹管的波纹是向外凸的，而且波纹管尽管加热或受冷，波纹间距还是固定不变的，当水垢附着于相对静止的管道内壁就不容易脱落，日积月累，最终会堵死管道，故需要定时进行化学清洗。
为了解决上述问题，本发明采用以下技术方案。
具体的，所述水汽通道21内设有弹簧条5，随着水汽通道21内温度变化，所述弹簧条5产生热胀冷缩现象，本发明所述的弹簧条5为常见的螺旋形结构；此时，结合弹簧条5相对较高的弹性以及螺旋结构，弹簧条5活动的变化相对较大，所述弹簧条5的线径、螺旋直径以及螺距均发生变化，即弹簧条5的径向和长度方向均产生扩张或者收缩，此时，可以实现水垢的全面清除，弹簧条5的线径即制作弹簧条5使用的弹簧丝的直径，弹簧条5的螺旋直径即弹簧条5在与其轴向垂直的面的投影的直径，弹簧条5的螺距即弹簧条5相邻两圈中心的轴向距离。
当本发明的蒸汽发生器工作时，换热管2内温度上升，即弹簧条5受热膨胀，此时，弹簧条5表面的水垢由于弹簧条5的膨胀会产生破裂，当换热管2停止工作，换热管2内温度慢慢下降，弹簧条5冷却后收缩，此时，弹簧条5表面的水垢由于弹簧条5的收缩而脱离弹簧条5，另外，在弹簧条5热胀冷缩的 过程中，结合弹簧条5相对较高的弹性，弹簧条5也会沿着换热管2的长度方向产生一定的伸缩，可以进一步防止水垢的积累，保证换热管2内的洁净度，使用本发明的蒸汽发生器时，先让其工作一段时间，将水汽通道21内的水垢排出，然后再用于蒸煮或其它用途，以免水垢进入到蒸锅内。
优选的，所述换热管2由304不锈钢或316不锈钢制成，所述弹簧条5由304不锈钢或316不锈钢制成，换热管2和弹簧条5的材料选择304不锈钢或316不锈钢，可以有效防止换热管2内壁和弹簧条5由于长时间工作而被腐蚀掉，避免由于腐蚀溶解和剥落而影响水蒸汽的卫生。
所述换热管2通过如下方法制得：
首先将弹簧条5由换热管2的一端套入水汽通道21内，然后通过弯管机将设有弹簧条5的换热管2由进水口2a的一端向内并向下进行弯曲成型加工以使换热管2呈上大下小的螺旋状，所述弹簧条5的长度和外径与所述换热管2的长度和内径相适配。
换热管2具体的长度和内径由蒸汽发生器的应用场地以及用途决定，当蒸汽发生器较大并且需要的水流量也较大时，换热管2的长度以及内径相对较大，此时弹簧条5的长度和外径相对选择较大的，相反，选择相对较小长度和外径的弹簧条5。
所述换热管2在进行弯曲成型加工之前，换热管2的内壁与弹簧条5之间的间隙L优选为0.5-2mm，将换热管2和弹簧条5的间隙控制在0.5-2mm，保证弹簧条5不会影响换热管2后续的弯曲成型加工，并且将换热管2和弹簧条5设置一定的间隙，为换热管2以及弹簧条5的热胀冷缩预留一定的空间。
首先将弹簧条5置于水汽通道21内，此时，弹簧条5会相对换热管2移动，若要结构稳定，则需要通过设置连接结构或者其它连接件进行连接，本发明则通过弯管机将设有弹簧条5的换热管2进行弯曲成型加工，置于换热管2内的弹簧条5也随着换热管2一同弯曲，此时，弹簧条5由于弯曲的结构不容易出现移位的现象，可以起到很好的稳固作用，此时，弹簧条5无需其它连接部件进行连接，本发明的换热管2结构简单、加工简便，并且水汽通道21内的水流不会受到其它连接件的影响，需要说明的是，本发明的弹簧条5还是可以有较小的移动范围的。
本发明通过弹簧条5以及换热管2的螺旋状加长水汽通道21内水加热的时 间，具体的，水汽通道21内的水流经过弹簧条5时，会受到弹簧条5的阻挡，水流速度减缓，水在换热管2内加热的时间也会增加，另外，经过弹簧条5的水流会随着弹簧条5的螺旋外形进行螺旋流动，以使水汽通道21内的水能够均匀受热，并且可以增加水流动的路径，从而进一步增加水在换热管2内加热的时间，螺旋状的换热管2在较小的空间即可实现较长的水汽通道21路径，可以增加水加热的时间，便于水蒸汽的产生，并且螺旋状的换热管2可以减小其内水的流速，进一步增加水加热的时间，本发明结合弹簧条5的螺旋状以及换热管2的螺旋状，使水汽通道21内的水得到最长的加热时间，保证水汽通道21内的水能加热成水蒸汽，并且让水蒸汽继续加热升温，达到设定的温度再通过出汽口2b喷出。
进一步地，所述换热管2的两端设有缩口部，所述缩口部的内径小于弹簧条5的外径，通过缩口部防止弹簧条5由于特殊情况滑出换热管2，保证换热管2能够安全工作，本发明的缩口部通过管道缩口机加工制得，并且缩口加工在弹簧条5套入水汽通道21之后以及换热管2进行弯曲成型加工之前进行，可以防止换热管2在弯曲成型加工时出现弹簧条5滑落等意外情况。
为了简化结构，去除换热管2与其它结构的焊接工序，本发明在所述换热管2的两端设有连接螺纹22，通过螺纹连接结构简单，并且可更换性强。
所述换热管2的内径D1范围优选为6-30mm，换热管2的内径太小，不利于水垢杂质的排出，换热管2的内径太大，对于生产场地和加工机械要求比较高，且制造成本高，由于弹簧条5和换热管2之间的间隙L范围确定、换热管2的管壁厚度范围确定，所以弹簧条5的外径D2的范围也确定；对应换热管2的内径范围优选为6-30mm，所述弹簧条5的线径范围优选为1-3mm，弹簧条5的线径即制作弹簧条5使用的弹簧丝的直径，当弹簧条5的线径处于此范围时，弹簧条5可以起到比较好的阻隔水流速度的作用，如果弹簧条5的线径太小，对水流起不到阻隔缓冲作用，如果弹簧条5的线径太大，对于加工难度和成本都有很大的影响。
换热管2的管壁厚度范围优选为0.6-2.5mm，此时，换热管2的耐压较大，不容易发生破裂，如果低于这个范围，换热管2会因为太薄容易发生破裂现象，如果高于这个范围，换热管2会因为太厚不容易加工。
本发明结合换热管2的内径D1范围、换热管2的管壁厚度范围、弹簧条5 的线径范围以及换热管2和弹簧条5之间的间隙范围L，保证换热管2内的水和水蒸汽的流速相对较为迟缓，对水汽通道21内的水和水蒸汽进行充分加热，并且本发明的换热管2处于此组合范围时，可以实现较佳的水垢清除。本发明也可以根据蒸汽发生器的大小以及应用环境对上述各个范围进行适当的调整，并不局限与本发明的范围。
参见附图7和附图8，为了防止热量过度散失，本发明在所述壳体的外表面包裹有保温层6，通过保温层6减少壳体内热量的散失，设有保温层时，容易出现零部件过热现象，本发明通过散热通水管7实现壳体外以及蒸汽发生器内的温度不会过高，具体的，所述散热通水管设于所述保温层的内部或者设于所述保温层的外表面，散热管可以为螺旋状设置于底部、侧面或者底部和侧面，散热通水管可以有多种形式。
另外，本发明将所述散热通水管7的入水口与外部水源连通，所述散热通水管7的出水口与换热管的进水口连通，散热通水管7内部的水吸收到从保温层6发出的多余热量后又送到换热管内，实现了热量的再次利用，提高了能源利用率。
在保温层6的内部或者外部设置有散热通水管7，由于散热通水管7的进水口与外部水源连通，外部水源相对保温层6的温度较低，散热通水管7以及其内的流动水会吸收保温层6多余的热量，可以有效防止蒸汽发生器外部与机体内部之间的元器件及电路因温度过高而烧坏。
其中附图7和附图8主要是为了表达保温层6和散热通水管7的结构，并不限制其它部件的结构。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (13)

  1. 一种便携式蒸汽发生器，包括壳体、设于壳体内的换热管以及设于壳体内用于加热换热管的发热管，其特征在于，所述换热管设有水汽通道，所述水汽通道的两端分别设有进水口和出汽口，所述换热管由进水口的一端逐渐向内并向下盘成上大下小的螺旋状，或者，所述换热管由出汽口一端逐渐向外并向上盘成上大下小的螺旋状。
  2. 根据权利要求1所述的蒸汽发生器，其特征在于，所述出汽口设于螺旋状换热管的螺旋中心。
  3. 根据权利要求1所述的蒸汽发生器，其特征在于，所述发热管包括设于壳体底部的弧形发热部以及由弧形发热部的两个端部延伸至壳体外的的两个电源接线端。
  4. 根据权利要求3所述的蒸汽发生器，其特征在于，所述发热管设有两个，分别为第一发热管和第二发热管，所述第一发热管的弧形发热部包围所述第二发热管的弧形发热部，所述第二发热管的两个电源接线端位于第一发热管的两个电源接线端之间。
  5. 根据权利要求1所述的蒸汽发生器，其特征在于，还包括传热铸铝体，所述传热铸铝体将换热管和发热管熔铸为一体式结构。
  6. 根据权利要求1所述的蒸汽发生器，其特征在于，所述换热管位于进水口和/或出汽口的部位设有泄压阀。
  7. 根据权利要求1所述的蒸汽发生器，其特征在于，所述换热管的长度为1-6m。
  8. 根据权利要求1所述的蒸汽发生器，其特征在于，所述换热管在水平投影面的最大圆弧的直径小于50cm。
  9. 根据权利要求1所述的蒸汽发生器，其特征在于，位于所述壳体内的换热管的高度差大于换热管外径的两倍。
  10. 根据权利要求1所述的蒸汽发生器，其特征在于，所述水汽通道内设有弹簧条，随着水汽通道内温度变化，所述弹簧条产生热胀冷缩现象；
    所述换热管通过如下方法制得：
    首先将弹簧条由换热管的一端套入水汽通道内，然后通过弯管机将设有弹簧条的换热管由进水口的一端向内并向下进行弯曲成型加工以使换热管呈上大下小的螺旋状，所述弹簧条的长度和外径与所述换热管的长度和内径相适配。
  11. 根据权利要求10所述的蒸汽发生器，其特征在于，所述换热管在进行弯曲成型加工之前，所述换热管的内壁与弹簧条之间的间隙为0.5-2mm。
  12. 根据权利要求10或11所述的蒸汽发生器，其特征在于，所述换热管的内径范围为6-30mm；所述弹簧条的线径范围为1-3mm，所述换热管的管壁厚度范围为0.6-2.5mm。
  13. 根据权利要求1所述的蒸汽发生器，其特征在于，还包括散热通水管，所述壳体的外表面包裹有保温层，所述散热通水管设于所述保温层的内部或者设于所述保温层的外表面；
    所述散热通水管的入水口与外部水源连通，所述散热通水管的出水口与换热管的进水口连通。
PCT/CN2016/084881 2015-06-04 2016-06-04 一种便携式蒸汽发生器 WO2016192685A1 (zh)

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