WO2010069107A1 - 一种用于热水器的加热单元 - Google Patents

一种用于热水器的加热单元 Download PDF

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Publication number
WO2010069107A1
WO2010069107A1 PCT/CN2008/073554 CN2008073554W WO2010069107A1 WO 2010069107 A1 WO2010069107 A1 WO 2010069107A1 CN 2008073554 W CN2008073554 W CN 2008073554W WO 2010069107 A1 WO2010069107 A1 WO 2010069107A1
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WO
WIPO (PCT)
Prior art keywords
heating unit
heating
pipe
water pipe
unit according
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Application number
PCT/CN2008/073554
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English (en)
French (fr)
Inventor
孙京岩
王任华
赵小勇
赵静姝
Original Assignee
海尔集团公司
武汉海尔热水器有限公司
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Application filed by 海尔集团公司, 武汉海尔热水器有限公司 filed Critical 海尔集团公司
Priority to PCT/CN2008/073554 priority Critical patent/WO2010069107A1/zh
Publication of WO2010069107A1 publication Critical patent/WO2010069107A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/18Arrangement or mounting of grates or heating means
    • F24H9/1809Arrangement or mounting of grates or heating means for water heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18Water-storage heaters
    • F24H1/20Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/208Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with tubes filled with heat transfer fluid

Definitions

  • the present invention relates to a heating unit for a water heater, in particular for a water heater comprising a water storage type and a hot working mode.
  • the heating pipe, the inlet pipe and the outlet pipe of the water heater are respectively welded and fixed on the inner tank of the water heater.
  • problems such as leakage and corrosion are likely to occur at the welded portion.
  • defects such as material costs and increased processing costs.
  • An object of the present invention is to provide a heating unit for a water heater in which a heating pipe and a water pipe are collectively fixed together.
  • a heating unit for a water heater includes a heating pipe and a water pipe, and the ends of the heating pipe and the water pipe are fixedly coupled to each other by a joint.
  • the heating pipe, the water pipe and the joint form a unit which is fixedly connected to each other _ constituting the heating unit according to the invention.
  • the connection point is reduced in connection with the structure in which the heating pipe, the water pipe, and the like are respectively connected to the inner tank of the water heater. This means that solder joints and workload are reduced. This ensures the sealing reliability of the joint and reduces the manufacturing cost.
  • the connecting seat has a through hole, and one end of the water pipe is fixed in the hole.
  • the water pipe is an inlet or outlet pipe, or a concentric inlet and outlet pipe.
  • the end of the heating pipe is eccentrically or concentrically fixed to the connecting seat with respect to the water pipe, and the water pipe and the heating pipe extend in the axial direction of the connecting seat on the same side of the connecting seat.
  • the heating pipe surrounds the water pipe in the circumferential direction of the water pipe, for example, the heating pipe spirally surrounds the water pipe or is parallel to and parallel to the axis thereof Stretch.
  • a through hole is provided in the connecting seat, and one end of the water pipe is fixedly mounted in the through hole.
  • the purpose of arranging the through hole in the middle of the connecting seat is to position the water outlet pipe in the middle of the connecting seat, so that it is convenient to provide a heating pipe around it. When the nozzle of the outlet pipe is located in the enclosure of the heating pipe, the most efficient heating can be achieved.
  • the connecting seat comprises a flange and an intermediate section, the outer circumference of the flange is provided with an external thread; and a mounting through hole is arranged between the flanges in the circumferential direction, the through hole is two Or two or more through holes uniformly distributed along the circumference of the flange.
  • the heating tube comprises a tube body and a heating element disposed in the tube body, and an end of the tube body is fixed on the flange through a mounting through hole in the upper flange of the connecting seat, and the heating element is electrically connected to the connecting terminal Connected on the piece.
  • the connecting seat is a cylindrical body having a stepped diameter.
  • a flange is provided at one end of the connector, and an external thread is provided on the outer circumferential surface.
  • the external heating unit is used to fix the entire heating unit to the inner tank of the water heater.
  • a gasket such as a rubber mat or a polyethylene mat may be added between the heating unit and the water heater.
  • An intermediate section is provided extending axially below the flange, the intermediate section having a smaller diameter than the flange.
  • a recessed portion is formed between the intermediate section and the flange, and the connecting terminal according to the present invention is disposed in this recess. The difference in diameter between the flange and the intermediate section ensures that the connecting terminal does not interfere with the outer circumferential surface of the intermediate section after it is mounted in the above recess.
  • the water pipe has a fixed portion at one end, the fixing portion includes an internal thread, a nut and a piece of external thread
  • the water pipe is fixed to the joint by fixing the internal thread of the fixed portion to the external thread of the intermediate portion of the joint.
  • the water pipe is fixed in the through hole of the connecting seat and coaxial with the through hole.
  • the end of the heating tube is fixed to the connecting seat through a mounting through hole in the upper flange of the connecting seat.
  • connection terminal includes an insulating support and a fixing tab.
  • the temperature measuring tube is further disposed on the connecting base, the temperature measuring tube includes an outer tube and a temperature sensor disposed in the outer tube; the temperature measuring tube and the water pipe are radially fixed to each other Connection seat
  • the heating pipe and the water pipe are combined and fixed on one connecting seat, thereby reducing the water heater and the water pipe compared with the case where the heating pipe and the water pipe are respectively mounted on the water heater. Connected or welded parts. This will directly improve the sealing safety performance of the water heater and reduce the connection The amount of work to be connected or welded. That is to say, when the heating pipe and the water pipe are mutually separated structures, it is necessary to respectively connect or weld the two to the inner tank of the water heater. This inevitably increases the possibility of leakage due to the increase in solder joints.
  • the heating pipe and the water pipe are fixedly connected to the same connecting seat, and then the connecting seat is fixedly mounted on the inner tank of the water heater, so that the connecting seat only needs to be welded or screwed.
  • the heating pipe and the water pipe can be connected together to the inner tank.
  • the inlet and outlet pipes are nested together and then mounted on the connector. This will further reduce the joint or solder joint. The direct result of reducing the weld is to reduce weld defects and corrosion that occurs at the weld.
  • At least a part of the inlet and outlet pipes of the water heater are made of an insulating material, and the shape of the inlet and outlet pipes is M-shaped, U-shaped, spiral, curved or insulated and sleeved in a non-insulated tube.
  • the inner and outer tubes disposed in a nested manner are straight tubes, and the resistance of the water body between the inlet and the outlet of the inlet and outlet pipes is ensured to have a resistance value of ⁇ 70 ⁇ . This ensures that no accidents will occur due to leakage of the water heater.
  • the inner tank of the water heater is grounded by a circuit composed of a bubble and a resistor.
  • the outer casing of the water heater is insulated from the inner casing, and the conductive connection between the outer hanger and the outer casing, the wall bolt and the outer hanger is electrically conductive, and one end of the circuit composed of the bubble and the resistor
  • the water heater is connected to the inner casing, and the other end is electrically connected to the outer casing.
  • Figure 1 is a schematic representation of an embodiment of a heating unit in accordance with the present invention, wherein the heating tube extends helically around the water conduit;
  • FIG. 2 is a view schematically showing a connection terminal connected to a heating pipe in the embodiment shown in FIG. 1;
  • FIG. 3 is a schematic representation of another embodiment of a heating unit in accordance with the present invention, wherein the heating tubes extend parallel to each other around the water conduit;
  • FIG. 4 is a view schematically showing a connection terminal connected to a heating pipe in the embodiment shown in FIG. 3;
  • Figure 5 is a schematic representation of a connector of an embodiment of the invention.
  • Figure 6 is a schematic plan view showing a connector of an embodiment of the present invention.
  • Figure 1 is a schematic representation of an embodiment of the invention in which the entire heating unit is designated by the reference numeral 1.
  • the connector 2 is basically a stepped cylinder.
  • One end of the cylinder is a flange 3, and the diameter of this section is larger than the diameter of other parts of the entire cylinder.
  • An external thread 4 is provided on the outer circumference of the flange 3, and the entire heating unit is fixed by this external thread 4 to the inner casing of the water heater not shown.
  • a seal is provided between the inner tank of the water heater and the flange 3, such as a rubber gasket, a polyethylene mat, and the like. This keeps the seal on the contact surface between the liner and flange 3.
  • the center of the connector 2 is provided with a through hole 5, as shown in Fig. 6.
  • two through-hole mounting holes 6 are provided in the flange 3 of the connecting seat 2 at a distance from the through hole 5 at one end in the radial direction.
  • the two through-mounting through holes 6 are also spaced apart from one another by an arc-shaped distance in the circumferential direction of the flange 3.
  • the ends of the heating pipe 7 are respectively fixed to the connecting seat 2 by the thickness of the flange 3 of the connecting seat 2, for example, by screwing or welding to the connecting seat 2.
  • connection terminal 8 includes an insulating support 9 and a fixing tab 10.
  • the insulating support 9 electrically insulates the electric heating element in the heating tube 7 from the entire heating unit 1. Thereafter, the electric heating element in the heating pipe 7 is connected to the power source through the fixed connecting piece 10 on the connection terminal 8, so that when the heating pipe 7 is energized, it is heated.
  • a heating pipe 7 is provided, but a plurality of pipes may be provided.
  • a water delivery pipe 11 is provided in the above-mentioned through hole 5.
  • One end of the water pipe 11 has a fixed portion 14, and the fixed portion 14 includes an internal thread, a nut, and a section of external threads.
  • the water pipe 11 is coaxial with the through hole 5 and is fixed in the through hole 5.
  • the heating pipe 7 spirally surrounds the water pipe 11 and extends in the axial direction of the water pipe 11 until it is far from the opening of the joint 2.
  • a hex nut 12 is provided below the flange 3.
  • the heating unit 1 according to the invention is fixed to the water heater by rotating this hex nut 12, and a seal such as a rubber mat is usually placed over the hex nut 12 so that between the heating unit 1 and the inner tank of the water heater Achieve sealing.
  • a relatively small diameter intermediate section 13 is provided, and the end of the intermediate section 13 remote from the flange 3 has an external thread 18 (as shown in Fig. 5).
  • the internal thread is fixed so that the water pipe is fixed to the joint.
  • the water pipe can also be welded directly to the joint.
  • the outer diameter of the intermediate section 13 is sufficiently small to ensure that the connecting terminal 8 is accommodated in the endless belt formed by the difference between the outer diameter of the flange 3 and the outer diameter of the intermediate section 13. That is, the connection terminal 8 is disposed under the flange 3 and does not interfere with the outer surface of the intermediate section 13 in the radial direction.
  • the water heater casing (not shown) can be placed on the joint 2 . Then, tighten the nut of the fixing portion 14.
  • connection terminal 8 includes an insulating support 9 and a fixed connecting piece 10.
  • the insulating support 9 electrically insulates the electric heating element in the heating tube 7 from the entire heating unit 1, and then connects the electric heating element of the heating tube 7 to the power source via the fixing tab 10.
  • connection terminals 8 are arranged in the circumferential direction on the lower end face of the flange 3, and are arranged at a distance in the radial direction with respect to the center line of the connection base 2, thereby ensuring that they do not interfere with the intermediate section 13.
  • Fig. 3 shows another embodiment according to the invention in which the heating pipe 7 extends parallel to the water pipe 11.
  • the heating pipe 7 extends parallel to the water pipe 11.
  • three sets of heating tubes 7 are used. These heating pipes 7 are evenly distributed at equal intervals in the circumferential direction, i.e., the angle between the heating pipes 7 is 120°. This distribution of the heating tube 7 is more clearly shown in Fig. 4.
  • the water pipe 11 is still disposed at the center of the joint 2 and penetrates the joint 2.
  • the heating pipe 7 surrounds the water pipe 11 outside the water pipe 11 to uniformly heat the water coming out of the opening above the water pipe 11.
  • the other structure of the heating unit 1 is the same as that of the above embodiment except that the arrangement of the heating tubes 7 is different.
  • a temperature measuring tube 16 for accommodating and mounting a temperature sensor is also provided on the connector block 2.
  • One end of the temperature measuring tube 16 is also fixed to the flange 3 of the connector 2, which usually passes through the flange 3 to enable the electrodes of the temperature sensor to be connected to the control circuit.
  • the temperature measuring tube 16 should be placed close to the water pipe 7 and its length should be equal to or smaller than the length of the water pipe 7.
  • the water delivery pipe 7 includes an inlet pipe and an outlet pipe.
  • the outlet pipe is fixed to the joint 2, and the inlet pipe concentrically surrounds the outlet pipe.
  • the water conduit 7 is composed of two tubes that are nested one on another, and at least one of the tubes is made of an insulating material.
  • a metal has a relatively small diameter and is sheathed with a relatively large diameter casing made of an insulating material.
  • the length of the inlet pipe to the outlet of the water pipe 7 is sufficiently long, so that the water flowing in the water pipe 7 has sufficient electric resistance, and the resistance value is even if there is leakage, since the resistance value of the water is large enough, There is a current that threatens the safety of human life through the user's body.
  • this nested structure is not the only structural choice, as long as the distance between the water inlet of the water pipe 7 and the water outlet can be extended so that the water flowing therein has a sufficiently large resistance value.
  • an M-shaped, U-shaped water pipe shape can be used.
  • an alarm circuit consisting of a bubble and a resistor can be connected to the connector 2 of the heating unit 1. Since the connecting base 2 is connected to the inner tank of the water heater, when there is a possibility that electric leakage causes the water heater inner tank to be charged, the bubble in the alarm circuit emits light to remind the user that the water heater has failed, and needs to be overhauled.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

本发明提供了一种用于热水器的加热单元,包括安装在连接座(2)上的加热管(7),其特征在于所述连接座(2)上有固定连接输水管(11)的端口,通过连接座(2)使加热管(7)和输水管(11)形成并列一体式连接结构。由于将输水管(11)和加热管(7)先分别固定且密封地连接在连接座(2),由此形成一个加热单元(1),然后再将整个加热单元(1)固定连接在热水器的内胆上,所以可以减少焊接点,节省材料,降低泄露。

Description

说明书 一种用于热水器的加热单元
技术领域
[1] 本发明涉及一种用于热水器的加热单元, 尤其是用于包含储水式和即热式工作 模式的热水器的加热单元。
背景技术
[2] 在电热式热水器中, 通常釆用将热水器的加热管、 进水管、 出水管分别焊接连 接固定在热水器的内胆上, 在这种情况下, 由于在内胆有多个焊点, 所以在焊 接部位容易出现泄露、 腐蚀等问题。 除此之外, 还会带来材料成本及加工成本 增加等缺陷。
对发明的公开
技术问题
[3] 本发明的目的在于提供一种将加热管、 输水管集中固定成一个整体的用于热水 器的加热单元。
技术解决方案
[4] 为实现上述发明目的, 根据本发明提供一种用于热水器的加热单元, 包括加热 管和输水管, 所述加热管和输水管的端部通过连接座相互固定连接成一体。
[5] 通过将加热管和输水管的端部一起固定连接在连接座上, 使得加热管、 输水管 和连接座形成一个相互固定连接的整体 _即构成根据本发明的加热单元。 在将 这种整体式的加热单元固定在热水器的内胆上吋, 相对分别将加热管、 输水管 等连接于热水器内胆上的结构而言, 减少了连接点。 这就意味着, 减少了焊接 点和工作量。 由此保证了连接处的密封可靠性并降低了制造成本。
[6] 所述连接座具有一个贯通孔, 所述输水管的一端固定于该孔中。 所述输水管为 进或出水管, 或同心设置的进水管和出水管。 所述加热管的端部相对所述输水 管偏心或同心地固定于连接座上, 所述输水管和加热管在所述连接座的同一侧 沿所述连接座的轴向方向延伸。 所述加热管在输水管的圆周方向上包围着输水 管, 例如, 所述加热管螺旋状围绕输水管或与其平行且相间地沿其轴线方向延 伸。
[7] 根据本发明, 在连接座上设有一个贯通孔, 输水管的一端固定安装在该贯通孔 中。 将贯通孔设置于连接座的中间的目的在于使出水管位于连接座的中间, 这 样便于在其周围设置加热管。 当出水管的管口位于加热管的包围之中吋, 可以 实现最有效的加热。
[8] 所述连接座包括法兰和中间段, 该法兰的外圆周上设有外螺纹; 沿圆周方向在 所述法兰上相间地设有安装通孔, 所述通孔为两个或两个以上沿着法兰的圆周 相间均匀分布的通孔。 所述加热管包括管体和设在管体内的加热元件, 管体的 端部穿过所述连接座上法兰中的安装通孔固定在法兰上, 加热元件电性连接在 连接端子上的连接片上。
[9] 根据本发明, 连接座呈台阶状变直径的圆柱体。 在连接座的一端设置有一个法 兰, 其外圆周表面上设置有外螺纹。 利用该外螺纹将整个加热单元固定在热水 器的内胆上。 为了在加热单元和热水器内胆之间实现密封, 可以在加热单元和 热水器之间加装橡胶垫、 聚乙烯垫等密封垫。
[10] 在法兰的下面沿轴向延伸地设置有中间段, 中间段的直径小于法兰。 在中间段 和法兰之间形成一个凹陷部分, 根据本发明的连接端子设置在这个凹陷之中。 法兰和中间段的直径差保证连接端子安装在上述凹陷中以后, 不会和中间段的 外圆周表面发生干涉。
[11] 所述输水管的一端具有固定部分, 该固定部分包括内螺纹、 螺母及一段外螺纹
。 通过固定部分的内螺纹与连接座的中间段的外螺纹相固定, 从而将输水管固 定在连接座上。 输水管被固定在连接座的贯通孔内并与贯通孔同轴。
[12] 所述加热管的端部穿过所述连接座上法兰中的安装通孔固定在所述连接座上。
所述连接端子包括绝缘支承和固定连接片。
[13] 所述连接座上还设有测温管, 所述测温管包括外管和设置于外管中的温度传感 器; 所述测温管与所述输水管径向相间地固定在连接座上
[14] 根据本发明的上述加热单元的结构, 将加热管和输水管结合固定在一个连接座 上, 从而与将加热管和输水管分别安装在热水器上的情况相比, 减少了与热水 器的连接或焊接部位。 这将直接提高了热水器的密封安全性能, 并且减少了连 接或焊接的工作量。 也就是说, 在加热管和输水管是相互分体结构的吋候, 需 要分别将两者连接或焊接到热水器的内胆上。 这样由于焊接点的增加, 必然增 加了泄漏的可能性。 而根据本发明的加热单元, 将加热管和输水管固定连接在 同一个连接座上, 然后再将这个连接座固定安装在热水器的内胆上, 这样只需 将连接座焊接或通过螺纹连接在热水器的内胆上, 就可以同吋将加热管和输水 管一起连接在内胆上。 当釆用根据本发明的一种优选结构的吋候, 将进水管和 出水管相互套装在一起, 然后再将其安装在连接座上。 这将进一步减少连接或 焊接点。 而减少焊接点的直接结果是降低焊接不良点以及在焊接点处发生的腐 蚀。
[15] 所述热水器的进、 出水管的至少一部分由绝缘材料构成, 所述进、 出水管的形 状为 M形、 U形、 螺旋形、 曲线形或绝缘管套叠在非绝缘管内的套管, 在所述套 管结构中, 套叠设置的内外管为直管, 处于所述进、 出水管的进口至出口之间 的水体的电阻通过结构来保证电阻阻值≥70ΚΩ。 由此可以保证不会由于热水器 的漏电发生伤人事故。
[16] 所述热水器的内胆通过氖泡和电阻组成的电路接地。
[17] 所述热水器的外壳和外挂架之间相互绝缘, 所述氖泡和电阻组成的电路的一端 与热水器内胆连接, 其另一端直接与用于安装热水器的墙体连接。
[18] 所述热水器的外壳与内胆相互绝缘安装, 外挂架和外壳之间、 挂墙螺栓与外挂 架之间均为导电良好的导电连接, 所述氖泡和电阻组成的电路的一端与热水器 内胆连接, 其另一端与外壳导电连接。
[19] 根据本发明的这种结构, 可以及吋准确地向使用者提供热水器漏电的报警。
附图说明
[20] 图 1示意性表示了根据本发明的加热单元的一个实施例, 其中的加热管螺旋形 围绕输水管延伸;
[21] 图 2示意性表示了图 1所示实施例中与加热管相连接的连接端子;
[22] 图 3示意性表示了根据本发明的加热单元的另一个实施例, 其中的加热管围绕 输水管与其相互平行地延伸;
[23] 图 4示意性表示了图 3所示实施例中与加热管相连接的连接端子; [24] 图 5示意性表示了本发明实施例的连接座;
[25] 图 6示意性表示了本发明实施例的连接座的俯视图。
本发明的最佳实施方式
[26] 图 1示意性地表示了根据本发明的一个具体实施例, 其中, 用附图标号 1表示整 个加热单元。
[27] 如图 1所示, 连接座 2基本上是一个台阶状的圆柱体。 该圆柱体的一端为法兰 3 , 这段的直径大于整个圆柱体其他部分的直径。 在法兰 3的外圆周上设有外螺纹 4, 整个加热单元通过这个外螺纹 4固定在图中没有表示的热水器的内胆上。 在 热水器的内胆和法兰 3之间设有密封件, 例如橡胶密封垫、 聚乙烯垫等。 由此保 持内胆和法兰 3接触面上的密封。
[28] 连接座 2的中心设有一个通孔 5, 如图 6所示。 同吋, 在径向上与通孔 5相距一端 距离地在连接座 2的法兰 3上还设有两个贯通的安装通孔 6。 这两个贯通的安装通 孔 6在法兰 3的圆周方向上也相互间隔一端弧形距离。 如图 1所示, 加热管 7的两 端分别贯穿连接座 2的法兰 3的厚度固定在连接座 2上, 例如通过螺纹连接或焊接 连接在连接座 2上。
[29] 连接端子 8包括绝缘支承 9和固定连接片 10。 绝缘支承 9使加热管 7中的电加热元 件与整个加热单元 1电绝缘。 此吋, 通过连接端子 8上的固定连接片 10将加热管 7 中的电热元件与电源连接, 从而在给加热管 7通电的吋候, 使其发热。
[30] 图 1所示的实施例中, 设置了一根加热管 7, 但也可是设置多根。 在本实施例中 , 在上述通孔 5中设有一根输水管 11。 该输水管 11的一端具有固定部分 14, 该固 定部分 14包括内螺纹、 螺母及一段外螺纹。 输水管 11与通孔 5同轴且固定在通孔 5内。 加热管 7螺旋形围绕输水管 11并沿着输水管 11的轴线方向延伸, 直至其远 离连接座 2的开口附近。
[31] 如图 1所示, 在法兰 3之下设置有一个六角螺母 12。 通常, 通过旋转这个六角螺 母 12将根据本发明的加热单元 1固定在热水器上, 并且通常在六角螺母 12的上面 放置橡胶垫之类的密封件, 从而在加热单元 1和热水器的内胆之间实现密封。
[32] 如图 1所示, 在法兰 3下面, 设置有一个直径相对较小的中间段 13, 该中间段 13 的远离法兰 3的一端具有外螺纹 18 (如图 5所示) , 可以与输水管的固定部分 14 的内螺纹相固定, 从而将输水管固定在连接座上。 当然, 在其他实施例中, 输 水管也可以直接被焊接在连接座上。 中间段 13的外径足够地小, 以至于能够保 证在法兰 3的外径和中间段 13的外径的差所形成的环形带中容纳连接端子 8。 也 就是说, 连接端子 8设置在法兰 3之下, 并且在径向方向上不会与中间段 13的外 表面发生干涉。
在将热水器加热单元 1固定在热水器内胆上之后, 可以将热水器外壳 (图中没 有示出) 套在连接座 2上。 然后, 再拧紧固定部分 14的螺母。
[34] 图 2表示了根据本发明的连接端子 8的端部的结构。 从图中可以看出, 连接端子 8包括绝缘支承 9和固定连接片 10。 绝缘支承 9使加热管 7中的电加热元件与整个 加热单元 1相互电绝缘, 然后通过固定连接片 10将加热管 7的电加热元件与电源 连接。
[35] 在图 2所示的实施例中, 连接端子 8的绝缘支承 9的一个面抵靠在法兰 3的下端面 上。 两个连接端子 8在法兰 3的下端面上沿圆周方向相间布置, 并在径向相对连 接座 2的中心线一段距离布置, 以此保证不与中间段 13相互干涉。
[36] 图 3表示根据本发明的另一个实施例, 其中的加热管 7平行于输水管 11延伸。 在 本实施例中, 釆用了三组加热管 7。 这些加热管 7在圆周方向以相等的间距均匀 分布, 即各加热管 7之间的夹角为 120°。 图 4中更清楚地表示了加热管 7的这种分 布情况。 与上述实施例相同, 输水管 11依然设置在连接座 2的中心并贯穿连接座 2。 在这种结构中, 加热管 7在输水管 11的外面包围着输水管 11, 从而均匀地对 从输水管 11上面的开口中出来的水进行加热。
[37] 在本实施例中, 除去加热管 7布置的方式不同外, 加热单元 1的其他结构与上述 实施例的相同。
[38] 从图 1和 3可以看出, 在连接座 2上还设置有一根用于容纳和安装温度传感器的 测温管 16。 测温管 16的一端也固定在连接座 2的法兰 3上, 该段通常穿过法兰 3, 以使温度传感器的电极能够与控制电路连接。 测温管 16应该靠近输水管 7设置, 其长度应等于或小于输水管 7的长度。
[39] 在根据本发明的另一个实施例中, 输水管 7包括进水管和出水管。 在这种实施 方式中, 出水管固定在连接座 2上, 而进水管则同心地包围着出水管。 [40] 根据本发明的另一个实施例, 输水管 7由相互套叠的两根管子组成, 其中至少 有一根管子的一部分由绝缘材料制成。 例如, 一根金属的直径比较小, 其外面 套叠一根直径比较大的由绝缘材料制成的套管。 由此使得输水管 7进口至出口的 长度足够长, 从而使得在输水管 7中流动的水具有足够的电阻, 该阻值达到即使 有漏电情况出现, 由于水的电阻值足够大, 而不会有威胁人生命安全的电流通 过使用者的身体。
[41] 当然, 这种套叠的结构并不是唯一的结构选择, 只要能够延长输水管 7进水口 至出水口之间的距离从而使得在其中流动的水具有足够大的电阻值即可。 在这 个前提下, 例如可以釆用 M形、 U形的输水管形状。
[42] 当然, 为了进一步保证根据本发明的加热单元 1在使用过程中更加安全可靠, 还可以在加热单元 1的连接座 2上连接一个由氖泡和电阻组成的报警电路。 由于 连接座 2是与热水器的内胆相连的, 这样在有可能发生漏电使热水器内胆带电的 吋候, 报警电路中的氖泡发光从而提醒使用者该热水器已经发生故障, 需要马 上检修。
[43] 这种报警电路的另一端应该接大地, 例如与安装固定热水器的墙体连接等等。
总是, 只要是将报警电路的一端与热水器中有可能在意外情况下带电的部位连 接, 而另一端与大地连接达到在漏电情况下能够及吋报警即可。

Claims

权利要求书
1. 一种用于热水器的加热单元, 包括安装在连接座 (2) 上的加热管 (7)
, 其特征在于所述连接座 (2) 上有固定连接输水管 (11) 的端口, 通过连 接座 (2) 使加热管 (7) 和输水管 (11) 形成并列一体式连接结构。
2. 根据权利要求 1所述的加热单元, 其特征在于, 所述连接座 (2) 具有一 个贯通的孔 (5) , 所述输水管 (11) 的一端固定于该孔 (5) 中。
3 . 根据权利要求 2所述的加热单元, 其特征在于, 所述输水管 (11) 为进 或出水管, 或同心设置的进水管和出水管。
4. 根据权利要求 2所述的加热单元, 其特征在于, 所述加热管 (7) 的端部 相对所述输水管 (11) 偏心地固定于连接座 (2) 上, 所述输水管 (11) 和 加热管 (7) 在所述连接座 (2) 的同一侧沿所述连接座 (2) 的轴向方向延 伸。
5 . 根据权利要求 4所述的加热单元, 其特征在于, 所述加热管 (7) 螺旋状 围绕输水管 11或与其平行且相间地沿其轴线方向延伸。
6. 根据上述权利要求之一所述的加热单元, 其特征在于, 所述连接座 (2 ) 包括法兰 (3) 、 中间段 (13) 和连接螺纹 (18) , 该法兰 (3) 的外圆 周上设有外螺纹 (4) ; 外螺纹 (4) 的下方设有六角螺母 (12) 。 根据权利要求 6所述的加热单元, 其特征在于, 所述输水管 (11) 的一端具 有固定部分 (14) , 所述固定部分 (14) 包括内螺纹、 螺母及一段外螺纹
8 . 根据权利要求 6所述的加热单元, 其特征在于, 在所述法兰 (3) 上相间 地设有安装通孔 (6) , 所述通孔 (6) 为两个或两个以上的通孔。
9. 根据上述权利要求之一所述的加热单元, 其特征在于, 所述加热管 (7
) 包括管体和设在管体内的加热元件, 管体的端部穿过所述连接座 (2) 上 法兰 (3) 中的安装通孔 (6) 固定在法兰 (3) 上, 加热元件固定连接在连 接端子 (8) 的连接片 (10) 上。
10. 根据上述权利要求之一所述的加热单元, 其特征在于, 所述连接座 (2 ) 上还设有测温管 (16) , 所述测温管 (16) 包括外管和设置于外管中的 温度传感器; 所述测温管 (16) 与所述输水管 (11) 径向相间地固定在在 连接座 (2) 上。
11.
根据上述权利要求之一所述的加热单元, 其特征在于, 所述输水管 (11) 的至少一部分由绝缘材料构成, 所述输水管的形状为 M形、 U形、 螺旋形 、 曲线形或绝缘管套叠在非绝缘管内的套管。
12.
根据上述权利要求之一所述的加热单元, 其特征在于, 所述加热单元 (1) 的连接座 (2) 通过氖泡和电阻组成的电路接地。
13.
根据上述权利要求之一所述的加热单元, 其特征在于, 所述热水器的内胆 与外壳绝缘, 所述内胆通过氖泡和电阻与外壳电性连接。
PCT/CN2008/073554 2008-12-17 2008-12-17 一种用于热水器的加热单元 WO2010069107A1 (zh)

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