WO2022152277A1 - Dispositif à gaz et chauffe-eau à gaz - Google Patents

Dispositif à gaz et chauffe-eau à gaz Download PDF

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Publication number
WO2022152277A1
WO2022152277A1 PCT/CN2022/072179 CN2022072179W WO2022152277A1 WO 2022152277 A1 WO2022152277 A1 WO 2022152277A1 CN 2022072179 W CN2022072179 W CN 2022072179W WO 2022152277 A1 WO2022152277 A1 WO 2022152277A1
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WO
WIPO (PCT)
Prior art keywords
water box
equipment according
frame body
gas
heat exchange
Prior art date
Application number
PCT/CN2022/072179
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English (en)
Chinese (zh)
Inventor
李龙
杜小文
杨万沔
梁国荣
Original Assignee
芜湖美的厨卫电器制造有限公司
美的集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 芜湖美的厨卫电器制造有限公司, 美的集团股份有限公司 filed Critical 芜湖美的厨卫电器制造有限公司
Publication of WO2022152277A1 publication Critical patent/WO2022152277A1/fr

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    • 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
    • F24H9/00—Details
    • 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
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates

Definitions

  • the present application relates to the technical field of water heaters, and more particularly, to a heat exchanger, gas-fired equipment and gas-fired water heaters.
  • the heat exchanger includes a plurality of heat exchange tubes, a left water box and a right water box.
  • the heat exchange tube near the left water box or the right water box is exposed to high temperature flue gas and cold water. Under the alternating action of cold and heat, a thermal stress cycle is formed. If the welding quality is poor, the welding seam between the heat exchange tube and the left water box or the right water box may cause fatigue cracks due to thermal fatigue, resulting in water leakage.
  • the present application aims to solve one of the technical problems in the related art at least to a certain extent.
  • the present application proposes a heat exchanger, which can reduce the thermal fatigue of the heat exchange tube and avoid cracks in the weld between the heat exchange tube and the left water box or the right water box.
  • the application also proposes a water heater with the above heat exchanger, which has a long service life and is not prone to water seepage problems.
  • the heat exchanger includes: a plurality of heat exchange tubes; a left water box and a right water box, the left water box defines a left water cavity, and the right water box defines a right water box
  • the left water box is welded with the left ends of the plurality of heat exchange tubes, the left water cavity is communicated with the plurality of heat exchange tubes, and the right water box is welded with the right ends of the plurality of heat exchange tubes.
  • the right water cavity is communicated with a plurality of the heat exchange tubes, wherein one of the left water cavity and the right water cavity is connected with the water inlet pipe, and the other is connected with the water outlet pipe;
  • the air baffle is arranged on the right side of the left water box and/or the left side of the right water box, and is used to interfere with the continuous flow of smoke to the left water box and the right water box.
  • the flue gas baffle on the right side of the left water box and/or the left side of the right water box, the normal flow of flue gas is disturbed, and the continuous flow to the left water box and the right water box is avoided. It can reduce the thermal stress cycle of the heat exchange tube, avoid fatigue cracks at the weld, and improve the service life of the heat exchanger.
  • the smoke baffle is arranged in parallel with the right side of the left water box and/or the left side of the right water box, the smoke baffle is provided with a smoke barrier, and the smoke barrier is perpendicular to the right side of the left water box and the left side of the right water box.
  • the smoke barrier is attached to the right side of the left water box and/or the left side of the right water box and is connected by welding.
  • the flue gas baffle is provided with a plurality of through holes, a plurality of the heat exchangers pass through the through holes, and the side of the through holes away from the left water box or the right water box is provided with a plurality of through holes.
  • the flange is connected with the heat exchanger by welding.
  • the smoke barrier is arranged on the top of the smoke baffle.
  • the bottom of the flue gas baffle is formed with a corrugated surface.
  • a gas equipment includes: the heat exchanger of the above embodiment; a frame body, the frame body defines a combustion chamber; a burner, the burner is arranged in the combustion chamber and the The heat exchanger is oppositely arranged in the up-down direction; the fan is connected to the bottom of the frame body, and the air outlet of the fan communicates with the combustion chamber.
  • the left inner wall and the right inner wall of the frame body are spaced with a baffle plate, so as to construct an air-cooling channel, the air-cooling channel is communicated with the air outlet of the fan, and the air-cooling channel is At least a part of the air flow inside blows toward the bottom of the left water box or the right water box.
  • the bottom of the air-cooling channel has an inlet, and the top of the air-cooling channel has an outlet.
  • the inner wall of the front side and/or the inner wall of the rear side of the frame body is spaced with a baffle plate, so as to construct an air-cooling channel that communicates with the outlet of the fan, and the baffle plate has a plurality of interception plates.
  • the interception section has a transverse extension section and a longitudinal extension section, the transverse extension section extends from the inside to the outside, the start end of the longitudinal extension section is connected with the rear end of the transverse extension section, and the longitudinal extension section is folded. Extending upwardly obliquely, each of the shut-off sections has an outlet of the air-cooled channel.
  • each of the shut-off sections has the outlet formed in the laterally extending section and the opening direction is upward.
  • the inlet of the air cooling channel is lower than the combustion surface of the burner.
  • FIG. 1 is a perspective view of a heat exchanger according to some embodiments of the present application.
  • FIG. 2 is an exploded view of a gas appliance according to some embodiments of the present application.
  • FIG. 3 is a perspective view of a gas appliance according to some embodiments of the present application.
  • FIG. 4 is a perspective view of a flue gas baffle according to some embodiments of the present application.
  • FIG. 5 is a cross-sectional view of a gas appliance from an angle according to some embodiments of the present application.
  • FIG. 6 is a cross-sectional view of a gas appliance from another angle according to some embodiments of the present application.
  • Fig. 7 is the partial enlarged view of A place in Fig. 6;
  • FIG. 8 is a schematic diagram of a gas water heater according to some embodiments of the present application.
  • Heat exchanger 10 left water box 11; first end plate 111; second end plate 112; right water box 12; third end plate 121; fourth end plate 122; heat exchange tube 13;
  • flue gas baffle 40 through hole 41; flange 42; smoke barrier 43; corrugated surface 44;
  • baffle 80 blocking section 81; laterally extending section 811; longitudinally extending section 812;
  • Air cooling channel 90 Inlet 91; Outlet 92;
  • the heat exchanger 10 is used in a gas-fired equipment 100.
  • the burner 60 of the gas-fired equipment 100 burns to generate high-temperature flue gas, which passes through the heat exchanger 10 and the high-temperature gas.
  • the flue gas conducts heat exchange, so as to achieve the purpose of transferring heat to the outside, wherein the gas equipment 100 may be a water heater or a wall-hung boiler or the like.
  • the heat exchanger 10 includes a plurality of heat exchange tubes 13 , a left water box 11 , a right water box 12 and a flue gas baffle 40 .
  • the left water box 11 defines a left water cavity
  • the right water box 12 defines a right water cavity. That is, the water to be heated is introduced into and drawn out of the heat exchange tube 13 through the left water box 11 and the right water box 12 .
  • the left water box 11 may include a first end plate 111 and a second end plate 112 with convex hulls, and the first end plate 111 and the second end plate 112 butt each other to form the left water box 11, thereby forming a left water cavity.
  • the right water box 12 may also include a third end plate 121 and a fourth end plate 122 with convex hulls.
  • the third end plate 121 and the fourth end plate 122 are butted against each other to form the right water box 12, thereby forming a right water box 12. water cavity.
  • the left water box 11 is welded with the left ends of the plurality of heat exchange tubes 13 and the left water cavity is communicated with the plurality of heat exchange tubes 13
  • the right water box 12 is welded with the right ends of the plurality of heat exchange tubes 13
  • the right water cavity is connected with the plurality of heat exchange tubes 13.
  • the heat exchange tubes 13 communicate with each other. That is, the left water box 11 and the right water box 12 communicate with a plurality of heat exchange tubes 13 at the same time.
  • each group of small water cavities has a communication channel
  • each small water cavity can correspond to one or more heat exchange tubes 13, and the water flow can flow back and forth in the left and right and up and down directions, after many times After the heat exchange, it flows out from the water outlet pipe 30, thereby improving the heat exchange efficiency.
  • the heat exchange tube 13 near the left water box 11 or the right water box 12 forms a thermal stress cycle under the alternating action of high temperature flue gas and cold water. If the welding quality is poor, the welding seam between the heat exchange tube 13 and the left water box 11 or the right water box 12 may cause fatigue cracks due to thermal fatigue, resulting in water leakage.
  • FIG. 8 shows a schematic diagram of the gas water heater 1000.
  • the smoke near the left water box 11 and the right water box 12 cannot flow normally, so that the smoke cannot continue to the left water box 11 or the right water box 12. flow to form a dead zone of flue gas flow, so as to avoid continuous heat transfer to the vicinity of the left water box 11 and the right water box 12, so as to reduce the thermal stress cycle of the heat exchange tube 13 and avoid fatigue cracks at the welds. .
  • the temperature of the left and right ends of the heat exchange tube 13 can be lowered, and the thermal fatigue phenomenon of the left end or the right end of the heat exchange tube 13 can be reduced.
  • the left and right sides of the heat exchanger 10 can be provided with flue gas baffles 40 at the same time, and the flue gas baffles 40 can also be provided only on one side of the heat exchanger 10.
  • the flue gas baffles 40 are provided on The side where the heat exchanger 10 is connected to the water inlet pipe 20 .
  • the structural form and arrangement position of the smoke baffle 40 are not particularly limited.
  • the smoke baffle 40 may be a horizontal baffle or a T-shaped baffle extending along the left-right direction and connected to the left water box 11 or the right water box 12 plate, the flue gas baffle 40 can be located at the bottom, middle, top or other positions of the heat exchanger 10
  • the flue gas baffle 40 on the right side of the left water box 11 and/or the left side of the right water box 12, the normal flow of flue gas is disturbed, and the The continuous flow to the left water box 11 and the right water box 12 reduces the thermal stress cycle of the heat exchange tube 13 , avoids fatigue cracks at the welding seam, and improves the service life of the heat exchanger 10 .
  • the fume baffle 40 is arranged in parallel with the right side of the left water box 11 and/or the left side of the right water box 12 . That is to say, the flue gas baffle 40 and the left water box 11 or the right water box 12 are stacked in the left and right directions, so that the weld between the heat exchange tube 13 and the left water box 11 or the heat exchange tube 13 and the right water box 12 are welded.
  • the welded seam can be physically isolated by the flue gas baffle 40 to prevent the flue gas from directly acting on the welded seam.
  • the flue gas baffle 40 is provided with a smoke barrier 43, and the smoke barrier 43 is perpendicular to the right side of the left water box 11 and the right water box. Left side of box 12. Since the smoke is trapped in the vicinity of the left water box 11 and the right water box 12 by the smoke baffle 43 and the smoke baffle 40, it cannot flow naturally from bottom to top, so it cannot flow to the left water box 11 and the right water box.
  • High-temperature flue gas is continuously delivered near 12, so as to avoid the long-term thermal fatigue of the weld between the heat exchange tube 13 and the left water box 11 or the weld between the heat exchange tube 13 and the right water box 12 due to the action of high-temperature flue gas for a long time.
  • the "flue gas flow dead zone" means that at the beginning of the operation of the gas appliance 100, a part of the flue gas can enter the vicinity of the left water box 11 or the right water box 12, and the left water box 11 or the right water box 12 Once the nearby area is filled with flue gas, new high-temperature flue gas cannot be further input, thus forming a state where the flue gas cannot be updated.
  • the smoke barrier 43 is attached to the right side of the left water box 11 and/or the left side of the right water box 12 and connected by welding. In this way, seamless connection between the smoke barrier 43 and the left water box 11 or between the smoke barrier 43 and the right water box 12 can be achieved, avoiding between the smoke barrier 43 and the left water box 11 or between the smoke barrier 43 and the right water box 12.
  • a flue gas channel is formed between the boxes 12 , thereby effectively forming a dead zone of flue gas flow near the left water box 11 or the right water box 12 .
  • the flue gas baffle 40 is provided with a plurality of through holes 41 , and the plurality of heat exchangers 10 are provided with through holes 41 , and the through holes 41 are away from the left water box 11 or One side of the right water box 12 is provided with a flange 42, and the flange 42 is connected with the heat exchanger 10 by welding. That is, the flue gas baffle 40 is seamlessly connected with the heat exchanger 10 , so that the flue gas can be prevented from passing through the flue gas baffle 40 and acting on the welding seam between the heat exchange tube 13 and the left water box 11 or the right water box 12 . , thereby further reducing the thermal fatigue of the heat exchange tube 13 .
  • the sealed connection between the heat exchange tube 13 and the flue gas baffle 40 can also make the heat exchange tube 13 cool the flue gas baffle 40 to prevent the flue gas baffle 40 from being burnt by high temperature.
  • the smoke barrier 43 is provided on the top of the smoke baffle 40 . It can be understood that in the case of flue gas pre-cooling, condensed water is likely to be generated. If the smoke barrier 43 is arranged at the bottom of the flue gas baffle 40, the condensed water will be accumulated on the smoke barrier 43, resulting in smoke barrier. Corrosion of plate 43.
  • a corrugated surface 44 is formed at the bottom of the flue gas baffle 40 . In this way, the heat exchange efficiency between the heat exchange tube 13 and the flue gas can be improved, the flue gas baffle 40 can be prevented from being overheated and burnt out, and the service life of the flue gas baffle 40 can be improved.
  • the gas equipment 100 includes the heat exchanger 10 , the frame body 50 , the burner 60 and the fan 70 of the above-mentioned embodiment.
  • the frame body 50 defines a combustion chamber 51 .
  • the burner 60 is provided in the combustion chamber 51 and is provided opposite to the heat exchanger 10 in the up-down direction.
  • the fan 70 is connected to the bottom of the frame body 50 , and the air outlet of the fan 70 communicates with the combustion chamber 51 .
  • the fan 70 introduces the outside air into the combustion chamber to provide oxygen for the combustion of the burner 60, the high-temperature flue gas generated by the burner 60 flows from bottom to top, and the high-temperature flue gas exchanges heat with the heat exchanger 10, thereby To achieve the purpose of external heat transfer.
  • the gas equipment 100 of the embodiment of the present application includes the heat exchanger 10 with a long service life in the above embodiments, the service life of the gas equipment 100 of the embodiment of the present application is long.
  • the gas equipment 100 in the embodiment of the present application further includes a deflector 80.
  • a deflector 80 As shown in FIG. 5, the left inner wall and the right inner wall of the frame body 50 are spaced with a deflector 80, thereby forming an air cooling channel 90, The air cooling channel 90 is communicated with the air outlet of the fan 70 , and at least a part of the airflow in the air cooling channel 90 is blown toward the bottom of the left water box 11 or the right water box 12 .
  • the air cooling channel 90 introduces a part of the cold air sucked by the fan 70 into both ends of the heat exchanger 10 (near the left water box 11 and the right water box 12 ), thereby forming an air film at both ends of the heat exchanger 10, Avoid the heat of the high-temperature flue gas approaching the area of the left water box 11 or the right water box 12, thereby reducing the thermal fatigue of the heat exchange tube 13 and avoiding the welding seam between the heat exchange tube 13 and the left water box 11 or the right water box 12. Cracks are generated to prevent water seepage in the heat exchange tubes 13 .
  • the bottom of the air cooling channel 90 has an inlet 91
  • the top of the air cooling channel 90 has an outlet 92 . That is, the cold air enters from the bottom and exits from the top, and can be directly blown to both ends of the heat exchanger 10, thereby forming a low-temperature air film at both ends of the heat exchanger 10, thereby reducing the thermal fatigue of the heat exchange tubes 13 and avoiding heat exchange.
  • the welded seam between the tube 13 and the left water box 11 or the right water box 12 produces cracks to prevent water seepage in the heat exchange tube 13 .
  • the front inner wall and/or the rear inner wall of the frame body 50 is provided with a guide plate 80 at intervals, so as to construct an air cooling system that communicates with the outlet of the fan 70 .
  • the channel 90, the baffle 80 has a plurality of interception sections 81, the interception section 81 has a transverse extension section 811 and a longitudinal extension section 812, the transverse extension section 811 extends from the inside to the outside, and the start end of the longitudinal extension section 812 is connected to the transverse extension section 811.
  • the tail ends are connected, and the longitudinally extending section 812 is folded and extended upwardly and obliquely, and each intercepting section 81 has an outlet 92 .
  • the air-cooling channel 90 is divided by a plurality of interception sections 81 , and the flow is divided upward in each interception section 81 , and dispersed in the inner wall area of the deflector 80 , so that a gas film layer is always formed on the inner wall of the deflector 80 . , to prevent the heat from radiating to the outside through the deflector 80 and the frame body 50 , thereby reducing the influence of heat on the components of the gas equipment 100 .
  • each shut-off section 81 has an outlet 92 formed in the laterally extending section 811 and the opening direction is upward. Therefore, it is more favorable to form a gas film layer on the inner wall surface of the deflector 80 all the time, thereby reducing the heat radiation to the outside.
  • the inlet 91 of the air-cooling channel 90 is lower than the combustion surface of the burner 60 , so that the air temperature in the air-cooling channel 90 can be ensured to be relatively low.
  • the air source in the air cooling channel 90 is the cold air directly introduced by the fan 70 .
  • the temperature of the frame body 50 can also be lowered, so as to reduce the external heat radiation of the frame body 50 and reduce heat damage to the components of the gas equipment 100 .
  • connection In this application, unless otherwise expressly specified and limited, the terms “installation”, “connection”, “connection”, “fixation” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components.
  • connection connection
  • fixing and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components.
  • the specific meanings of the above terms in this application can be understood according to specific situations.
  • a first feature "on” or “under” a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “beneath” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level less than the second feature.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention concerne un échangeur de chaleur (10) et un dispositif à gaz (100). L'échangeur de chaleur comprend une pluralité de tubes d'échange de chaleur (13) ; une boîte à eau gauche (11) et une boîte à eau droite (12), la boîte à eau gauche étant pourvue d'une cavité d'eau gauche, la boîte à eau droite étant pourvue d'une cavité d'eau droite, la boîte à eau gauche est soudée aux extrémités gauches de la pluralité de tubes d'échange de chaleur et la cavité d'eau gauche est en communication avec la pluralité de tubes d'échange de chaleur, la boîte à eau droite est soudée aux extrémités droites de la pluralité de tubes d'échange de chaleur et la cavité d'eau droite est en communication avec la pluralité de tubes d'échange de chaleur, et l'une de la cavité d'eau gauche et de la cavité d'eau droite est raccordée à un tube d'entrée d'eau (20), et l'autre est raccordée à un tube de sortie d'eau (30) ; et un déflecteur de gaz de combustion (40), le déflecteur de gaz de combustion étant disposé sur le côté droit de la boîte à eau gauche et/ou sur le côté gauche de la boîte à eau droite, de façon à empêcher le gaz de combustion de s'écouler en continu vers la boîte à eau gauche et la boîte à eau droite.
PCT/CN2022/072179 2021-01-15 2022-01-14 Dispositif à gaz et chauffe-eau à gaz WO2022152277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202120120913.2U CN215725326U (zh) 2021-01-15 2021-01-15 换热器和燃气设备
CN202120120913.2 2021-01-15

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Publication Number Publication Date
WO2022152277A1 true WO2022152277A1 (fr) 2022-07-21

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114763972A (zh) * 2021-01-15 2022-07-19 芜湖美的厨卫电器制造有限公司 换热器和燃气设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109114812A (zh) * 2018-09-12 2019-01-01 广东万和新电气股份有限公司 一种换热器
CN210569238U (zh) * 2019-07-16 2020-05-19 广东万和新电气股份有限公司 一种换热器及具有该换热器的热水器
CN111442522A (zh) * 2020-04-02 2020-07-24 宁波方太厨具有限公司 燃气热水器
CN211823178U (zh) * 2019-10-31 2020-10-30 芜湖美的厨卫电器制造有限公司 燃烧室和燃气设备
CN211876377U (zh) * 2019-12-10 2020-11-06 芜湖美的厨卫电器制造有限公司 燃气设备
CN212409092U (zh) * 2019-10-31 2021-01-26 芜湖美的厨卫电器制造有限公司 燃气设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109114812A (zh) * 2018-09-12 2019-01-01 广东万和新电气股份有限公司 一种换热器
CN210569238U (zh) * 2019-07-16 2020-05-19 广东万和新电气股份有限公司 一种换热器及具有该换热器的热水器
CN211823178U (zh) * 2019-10-31 2020-10-30 芜湖美的厨卫电器制造有限公司 燃烧室和燃气设备
CN212409092U (zh) * 2019-10-31 2021-01-26 芜湖美的厨卫电器制造有限公司 燃气设备
CN211876377U (zh) * 2019-12-10 2020-11-06 芜湖美的厨卫电器制造有限公司 燃气设备
CN111442522A (zh) * 2020-04-02 2020-07-24 宁波方太厨具有限公司 燃气热水器

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