WO2013026224A1 - 冷凝高效燃气热水器 - Google Patents

冷凝高效燃气热水器 Download PDF

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Publication number
WO2013026224A1
WO2013026224A1 PCT/CN2011/080540 CN2011080540W WO2013026224A1 WO 2013026224 A1 WO2013026224 A1 WO 2013026224A1 CN 2011080540 W CN2011080540 W CN 2011080540W WO 2013026224 A1 WO2013026224 A1 WO 2013026224A1
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Prior art keywords
water tank
heat exchange
hood
water heater
burner
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PCT/CN2011/080540
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English (en)
French (fr)
Inventor
景洪
Original Assignee
重庆三温暖电气有限公司
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Publication of WO2013026224A1 publication Critical patent/WO2013026224A1/zh

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Classifications

    • 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
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/205—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes
    • 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
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the invention relates to the technical field of gas water heaters, in particular to a condensing high efficiency gas water heater.
  • Preheating the cold water in the inlet pipe is equivalent to preheating before the ordinary gas water heater heats the cold water. It is worth noting that the heat used to preheat the cold water is not obtained by burning the gas, but uses the smoke that could not be recovered. The heat in the gas, so as to achieve energy-saving effect, and environmentally friendly, so that the final exhaust gas temperature is only about 60 ° C, and then transferred to the fuselage, the temperature has been reduced, touched by hand, only a little warm feeling, The hand can stay on the body.
  • the condensing gas water heater needs to utilize the latent heat in the flue gas, the exhaust gas temperature is inevitably lowered, thereby generating condensed water, and the acid gas in the flue gas is dissolved in the condensed water to form acidic condensed water. Therefore, the condensing gas water heater adopting the indirect heat exchange method has two technical problems different from the ordinary water heater: one is the problem of generation and discharge of acid condensed water; the other is the corrosion problem of the acid condensate on the surface of the heat exchanger.
  • the condensed water generated by the heat exchange pipe during the heating process of the existing condensing water heater is inevitably dripped/flowed along the inner wall of the heat exchange pipe, and the heat exchange pipe is usually disposed above the burner, and the high temperature flue gas passes upward through the water tank.
  • a heat exchange pipe on the central vertical axis absorbs heat and discharges. The corrosive condensate will drip onto the burner and the combustion flame. The condensate will corrode the burner and eventually cause the combustion conditions to deteriorate, lower the flame temperature, and then reduce the thermal efficiency.
  • an object of the present invention is to provide a condensing high-efficiency gas water heater that avoids corrosion of the burner by the condensed water having corrosive action and improves heat exchange efficiency.
  • the present invention provides the following technical solutions:
  • a condensing high-efficiency gas water heater includes a water tank, a burner disposed on a lower side of the water tank, a heat exchange pipe of a water tank, and an insulation layer and an outer casing covering the outside of the exhaust hood, wherein the exhaust hood has The exhaust port of the atmosphere is open, the heat exchange pipe is at least two, and one end of the bottom of the water tank avoids the position of the burner.
  • the exhaust hood specifically includes: a shunt cover at the top, a shunt cavity formed between the shroud and the top of the water tank; located at a lower side of the shroud, and a condensation hood connected to the shroud, a condensation chamber formed between the condensation hood and a side wall of the water tank, the condensation chamber being in communication with the diversion chamber.
  • the exhaust hood further includes a return hood disposed at a lower portion of the heat insulating layer, and a return chamber is formed between the return hood and the condensing cover, and the return chamber is respectively The exhaust port is in communication with the condensation chamber.
  • the shroud has a projection extending toward the heat exchange pipe.
  • the heat exchange pipe is arranged around the burner.
  • the heat exchange pipes are three.
  • the condensing high-efficiency gas water heater changes the position distribution of the heat exchange pipe, cancels the central pipe on the vertical central axis of the water tank, and increases the heat exchange of two or more.
  • the position of the pipe is required to avoid the position of the burner.
  • the condensation water generated by the heat exchange pipe during the heating process of the condensing high-efficiency gas water heater is inevitably dripped/flowed along the inner wall of the heat exchange pipe.
  • the invention changes the position of the heat exchange pipe, bypasses the burner and the combustion flame. , to ensure that the condensate will no longer drip onto the burner and the combustion flame.
  • the problem of corrosion of the burner by the condensed water is fundamentally solved, the combustion condition caused by the condensed water is deteriorated, the flame temperature and the energy are lowered, and the thermal efficiency is improved.
  • FIG. 1 is a schematic structural view of a condensing high-efficiency gas water heater according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a condensing high-efficiency gas water heater according to another embodiment of the present invention.
  • the invention discloses a condensing high-efficiency gas water heater, which avoids corrosion of the burner by the condensed water having corrosive action and improves heat exchange efficiency.
  • FIG. 1 is a condensing high efficiency gas water heater according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a condensing high-efficiency gas water heater according to another embodiment of the present invention.
  • the condensing high-efficiency gas water heater provided by the embodiment of the invention comprises a water tank 8, a burner 6, a hood, a heat exchange pipe 9, an insulation layer 10 and a casing 11.
  • the water tank 8 is for holding cool water
  • the burner 6 is disposed on the lower side of the water tank 8 for heating the cold water in the water tank 8.
  • the exhaust hood is disposed outside the water tank 8 and has a smoke evacuation gap with the water tank 8, and the smoke exhausted by the heat exchange pipe 9 is exhausted by the smoke evacuation gap.
  • the heat exchange pipe 9 extends longitudinally through the water tank 8, and the two ends pass through the top and bottom of the water tank 8, respectively.
  • the heat insulating layer 10 and the outer casing 11 are wrapped on the outer side of the exhaust hood, the exhaust hood has an exhaust port 4 that communicates with the atmosphere, and the heat exchange pipe 9 is at least two, and the one end of the bottom of the water tank 8 avoids the burner. 6 location.
  • the distribution position diameter of the heat exchange pipe 9 should be appropriate.
  • the distribution diameter of the plurality of heat exchange pipes 9 is less than or equal to the diameter of the center burner of the water tank, and the condensed water will affect the burner 6, and the distribution of the plurality of heat exchange pipes 9
  • the position diameter is too large to reduce the heat transfer effect.
  • the condensing high-efficiency gas water heater changes the position distribution of the heat exchange pipe 9 , cancels the central pipe on the vertical central axis of the water tank, and adds two or more heat exchange pipes 9 , and the position distribution requirement thereof Avoid the position of the burner 6.
  • the condensed water generated by the heat exchange pipe 9 during the heating process of the condensing high-efficiency gas water heater is inevitably dripped/flowed along the inner wall of the heat exchange pipe 9, and the present invention bypasses the burner by changing the position of the heat exchange pipe 9 6 and the burning flame ensures that the condensed water will no longer drip onto the burner 6 and the combustion flame.
  • the invention fundamentally solves the problem that the condensed water corrodes the burner 6, the combustion condition caused by the condensed water is deteriorated, the flame temperature and the energy are lowered, and the thermal efficiency is improved.
  • the fume hood disclosed in the above embodiment may specifically include the shroud 1 and the condensing cover 2.
  • the shunt cover 1 is located at the top of the water tank 8, and a shunting chamber is formed between the shunting cover 1 and the top of the water tank 8, and the flue gas flowing along the top of the heat exchange flue pipe 9 is shunted by the shroud 1 and flows downward along the diverting chamber .
  • the condensation hood 2 is located on the lower side of the shroud 1, and is connected to the shroud 1, and a condensation chamber 3 is formed between the condensation hood 2 and the side wall of the water tank 8, and the condensation chamber 3 communicates with the diversion chamber.
  • the exhaust hood provided by the present invention may further include a return hood 5 disposed at a lower portion of the heat insulating layer 10, and a return chamber 7 is formed between the return hood 5 and the condensing cover 2, and the return chamber 7 and the exhaust port respectively 4 is in communication with the condensation chamber 3.
  • the utility model can ensure that the length of the condensation chamber 3 is sufficiently long by providing the reflux cover 5, and the heat exchange efficiency is improved.
  • the flue gas forms a recirculation chamber between the reflux cover 5 and the condensation cover 2 7 Flow upwards until it is exhausted through the exhaust port 4.
  • the shroud 1 has a protrusion extending toward the heat exchange pipe 9, and the heat energy and the high temperature flue gas released by the burner 6 are first exchanged for the first time through the bottom of the water tank 8, and then passed through the heat exchange pipe 9 for a second time.
  • the heat exchange, the residual heat and the high-temperature flue gas which have passed the secondary heat exchange are blocked by the protrusion of the shunt cover 1 at the upper port of the heat exchange pipe 9, and are reversed downward by the shroud 1, in the condensation chamber 3 and the outer wall of the water tank 8.
  • the heat exchange is carried out again, the residual heat and the high temperature flue gas are fully absorbed, and the flue gas temperature falls below the water vapor dew point temperature, and a certain amount of condensed water is generated at this time.
  • the condensed water will flow along the inner and outer walls of the condensation chamber 3 to the water tray at the bottom.
  • the heat exchange pipe 9 is evenly arranged around the burner 6.
  • the heat exchange tubes 9 are three.

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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)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

一种冷凝燃气热水器，包括水箱（8）、设置于水箱（8）下侧的燃烧器（6）、设置于水箱（8）外侧与水箱（8）具有排烟间隙的排烟罩、纵向贯穿水箱（8）的换热烟管（9）以及包覆于排烟罩外侧的保温层（10）和外壳（11），排烟罩具有与大气相通的排气口（4），换热烟管（9）至少为两个，且位于水箱（8）底部的一端避开燃烧器（6）的位置。

Description

冷凝高效燃气热水器 本申请要求于 2011 年 8 月 22 日提交中国专利局、 申请号为 201110241659.2、发明名称为"冷凝高效燃气热水器 "的中国专利申请的优先 权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及燃气热水器技术领域，特别涉及一种冷凝高效燃气热水器。
背景技术
随着科学技术的不断发展， 人们生活水平的日益改进， 热水在人们日 常生活中的需求量大大增加， 热水器、 燃气热水器被人们广泛使用， 尤其 是燃气容积式热水器逐渐走进了千家万户。
普通的燃气热水器工作的时候， 会排放出大量的烟气， 温度高达 180 °C , 普通的热水器无法利用这部分热量， 被白白地浪费掉， 同时， 在排放 高达 180°C高温烟气的过程中， 热传递使机身明显发烫， 用手触摸， 无法在 机身上停留。 而冷凝技术的关键在于高效冷凝换热器， 热水器的进冷水管 紧贴着冷凝换热器， 排放的高温烟气经过冷凝换热器的时候， 绝大部分热 量被冷凝换热器吸收， 用以预热进水管内的冷水， 相当于在普通燃气热水 器加热冷水之前进行了一次预先加热， 值得注意的是用以预热冷水的热量 不是通过燃烧燃气获得， 而是利用了原本无法回收的烟气中的热量， 从而 达到节能效果， 兼具环保， 这样最终排出的烟气温度只有 60°C左右， 再传 递到机身时， 温度已有所降低， 用手触摸， 只有些微温的感觉， 手完全可 以停留在机身上。
然而， 冷凝式热水器由于需要利用烟气中的潜热， 因而必然会降低排 烟温度， 从而会产生冷凝水， 并且烟气中的酸性气体会溶于冷凝水， 从而 形成酸性冷凝水。 因此， 采用间接换热方式的冷凝式燃气热水器有两个不 同于普通热水器的技术问题： 一个是酸性冷凝水的产生和排放问题； 另一 个就是酸性冷凝水对换热器表面的腐蚀问题。 现有冷凝式热水器加热过程中通过换热烟管产生的冷凝水不可避免的 沿换热烟管内壁向下滴 /流， 而换热烟管通常设置于燃烧器上方， 高温烟气 向上通过水箱中央垂直中轴线上的一根换热烟管吸收换热后排出。 具有腐 蚀作用的凝水会滴到燃烧器和燃烧火焰上，冷凝水对燃烧器具有腐蚀作用， 并最终导致燃烧工况变差、 降低火焰温度， 继而降低热效率。
因此， 如何避免具有腐蚀作用的冷凝水对燃烧器的腐蚀， 并提高换热 效率， 成为本领域技术人员亟待解决的重要技术问题。 发明内容
有鉴于此， 本发明的目的在于提供一种冷凝高效燃气热水器， 避免具 有腐蚀作用的冷凝水对燃烧器的腐蚀， 并提高换热效率。
为实现上述目的， 本发明提供如下技术方案：
一种冷凝高效燃气热水器， 包括水箱、设置于所述水箱下侧的燃烧器、 水箱的换热烟管以及包覆于所述排烟罩外侧的保温层和外壳， 所述排烟罩 具有与大气相通的排气口， 所述换热烟管为至少两个， 且其位于所述水箱 底部的一端避开所述燃烧器的位置。
优选地， 在上述冷凝高效燃气热水器中， 所述排烟罩具体包括： 位于顶部的分流罩， 所述分流罩与所述水箱的顶部之间形成分流腔； 位于所述分流罩下侧， 且与所述分流罩连接的冷凝罩， 所述冷凝罩与 所述水箱的侧壁之间形成冷凝腔， 所述冷凝腔与所述分流腔相连通。
优选地， 在上述冷凝高效燃气热水器中， 所述排烟罩还包括设置于所 述保温层下部的回流罩， 所述回流罩与所述冷凝罩之间形成回流腔， 所述 回流腔分别与所述排气口和所述冷凝腔相连通。
优选地， 在上述冷凝高效燃气热水器中， 所述分流罩上具有向所述换 热烟管延伸的凸起。
优选地， 在上述冷凝高效燃气热水器中， 所述换热烟管均勾的布置于 所述燃烧器的周围。 优选地， 在上述冷凝高效燃气热水器中， 所述换热烟管为三个。
从上述的技术方案可以看出， 本发明提供的冷凝高效燃气热水器， 改 变了换热烟管的位置分布， 取消水箱垂直中轴线上的中心烟管， 增加了二 根或二根以上的换热烟管， 其位置分布要求避开所述燃烧器的位置。 冷凝 高效燃气热水器加热过程中通过换热烟管产生的冷凝水不可避免的沿换热 烟管内壁向下滴 /流， 本发明通过改变了换热烟管的位置， 绕开燃烧器和燃 烧火焰， 保证了冷凝水不再会滴到燃烧器和燃烧火焰上。 从根本上解决了 冷凝水对燃烧器的腐蚀， 由冷凝水导致的燃烧工况变差、 降低火焰温度和 能量的问题， 提高了热效率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对 实施例或现有技术描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员 来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附 图。
图 1为本发明实施例提供的冷凝高效燃气热水器的结构示意图； 图 2为本发明另一实施例提供的冷凝高效燃气热水器的结构示意图。
具体实施方式
本发明公开了一种冷凝高效燃气热水器， 避免具有腐蚀作用的冷凝水 对燃烧器的腐蚀， 并提高换热效率。
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进 行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没 有做出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的 范围。
请参阅图 1和图 2, 图 1为本发明实施例提供的冷凝高效燃气热水器 的结构示意图； 图 2为本发明另一实施例提供的冷凝高效燃气热水器的结 构示意图。
本发明实施例提供的冷凝高效燃气热水器， 包括水箱 8、 燃烧器 6、排 烟罩、 换热烟管 9、 保温层 10和外壳 11。 其中， 水箱 8用于盛放凉水， 燃 烧器 6设置于水箱 8的下侧， 用于对水箱 8内的凉水进行加热。 排烟罩设 置于水箱 8的外侧并与水箱 8具有排烟间隙， 由换热烟管 9排除的烟气由 排烟间隙排走。 换热烟管 9纵向贯穿水箱 8, 两端分别穿过水箱 8的顶部 和底部。 保温层 10和外壳 11包覆于排烟罩的外侧， 排烟罩具有与大气相 通的排气口 4, 换热烟管 9为至少两个， 且其位于水箱 8底部的一端避开 燃烧器 6的位置。
换热烟管 9分布位置直径大小应合适， 多个换热烟管 9分布直径小于 等于水箱中心燃烧器直径范围内， 冷凝水会对燃烧器 6造成影响， 多个换 热烟管 9的分布位置直径太大降低换热效果。
本发明提供的冷凝高效燃气热水器， 改变了换热烟管 9的位置分布， 取消水箱垂直中轴线上的中心烟管， 增加了二根或二根以上的换热烟管 9, 其位置分布要求避开所述燃烧器 6的位置。 冷凝高效燃气热水器加热过程 中通过换热烟管 9产生的冷凝水不可避免的沿换热烟管 9内壁向下滴 /流， 本发明通过改变了换热烟管 9的位置， 绕开燃烧器 6和燃烧火焰， 保证了 冷凝水不再会滴到燃烧器 6和燃烧火焰上。 本发明从根本上解决了冷凝水 对燃烧器 6的腐蚀， 由冷凝水导致的燃烧工况变差、 降低火焰温度和能量 的问题， 提高了热效率。
上述实施例公开的排烟罩可具体包括分流罩 1和冷凝罩 2。 其中， 分 流罩 1位于水箱 8的顶部， 分流罩 1与水箱 8的顶部之间形成分流腔， 沿 换热烟管 9顶部流出的烟气由分流罩 1进行分流， 并沿分流腔向下流动。 冷凝罩 2位于分流罩 1的下侧， 且与分流罩 1连接， 冷凝罩 2与水箱 8的 侧壁之间形成冷凝腔 3 , 冷凝腔 3与分流腔相连通。 烟气经分流罩 1分流 后， 沿冷凝罩 2与水箱 8的侧壁之间的冷凝腔 3向下流动， 直至由排气口 4排出。 为了进一步优化上述技术方案， 本发明提供的排烟罩还可包括设置于 保温层 10下部的回流罩 5 , 回流罩 5与冷凝罩 2之间形成回流腔 7, 回流 腔 7分别与排气口 4和冷凝腔 3相连通。 本实用新型通过设置回流罩 5能 够保证冷凝腔 3的长度足够长， 提高换热效率， 烟气在冷凝腔 3内经过最 后一次换热后， 通过回流罩 5与冷凝罩 2之间形成回流腔 7向上流动， 直 至通过排气口 4排走。
分流罩 1上具有向换热烟管 9延伸的凸起， 燃烧器 6释放的热能及高 温烟气首先通过水箱 8的底部进行第一次换热， 然后通过换热烟管 9进行 第二次换热， 已通过二次热交换的余热及高温烟气在换热烟管 9上部端口 受阻于分流罩 1的凸起后， 通过分流罩 1向下逆转， 在冷凝腔 3中与水箱 8 外壁再次进行热交换， 余热及高温烟气被充分吸收， 烟气温度降至水蒸 气露点温度以下， 此时将产生一定的冷凝水。 冷凝水将顺着冷凝腔 3的内 外壁流至底部的积水盘内。
换热烟管 9均匀的布置于燃烧器 6的周围。在本发明的一优选方案中， 换热烟管 9为三个。
本说明书中各个实施例采用递进的方式描述， 每个实施例重点说明的 都是与其他实施例的不同之处， 各个实施例之间相同相似部分互相参见即 可。
对所公开的实施例的上述说明， 使本领域专业技术人员能够实现或使 用本发明。 对这些实施例的多种修改对本领域的专业技术人员来说将是显 而易见的， 本文中所定义的一般原理可以在不脱离本发明的精神或范围的 情况下， 在其它实施例中实现。 因此， 本发明将不会被限制于本文所示的 这些实施例， 而是要符合与本文所公开的原理和新颖特点相一致的最宽的 范围。

Claims

权 利 要 求
1、 一种冷凝高效燃气热水器， 包括水箱 （8)、 设置于所述水箱 （8) 下侧的燃烧器（6)、 设置于所述水箱 （8)外侧并与所述水箱 （8)具有排 烟间隙的排烟罩、 纵向贯穿所述水箱 （8) 的换热烟管 （9) 以及包覆于所 述排烟罩外侧的保温层（ 10 )和外壳（ 11 ), 所述排烟罩具有与大气相通的 排气口 （4), 其特征在于， 所述换热烟管（9)为至少两个， 且其位于所述 水箱 （8)底部的一端避开所述燃烧器（6) 的位置。
2、 如权利要求 1所述的冷凝高效燃气热水器， 其特征在于， 所述排烟 罩具体包括：
位于顶部的分流罩（ 1 ), 所述分流罩 （ 1 )与所述水箱 （ 8 ) 的顶部之 间形成分流腔；
位于所述分流罩（ 1 )下侧， 且与所述分流罩（ 1 )连接的冷凝罩（ 2 ), 所述冷凝罩（2)与所述水箱 （8) 的侧壁之间形成冷凝腔（3), 所述冷凝 腔（3)与所述分流腔相连通。
3、 如权利要求 2所述的冷凝高效燃气热水器， 其特征在于， 所述排烟 罩还包括设置于所述保温层（ 10 )下部的回流罩（ 5 ), 所述回流罩（ 5 )与 所述冷凝罩（2)之间形成回流腔（7), 所述回流腔（7)分别与所述排气 口 （4)和所述冷凝腔（3)相连通。
4、 如权利要求 3所述的冷凝高效燃气热水器， 其特征在于， 所述分流 罩（ 1 )上具有向所述换热烟管 （ 9 )延伸的凸起。
5、 如权利要求 1-4任一项所述的冷凝高效燃气热水器， 其特征在于， 所述换热烟管 （9) 均匀的布置于所述燃烧器（6) 的周围。
6、 如权利要求 5所述的冷凝高效燃气热水器， 其特征在于， 所述换热 烟管 （9) 为三个。
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