CN116538681A

CN116538681A - Water heater

Info

Publication number: CN116538681A
Application number: CN202310412144.7A
Authority: CN
Inventors: 王圣贤; 毕颖; 曹冠忠
Original assignee: Haier Smart Home Co Ltd; Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Current assignee: Haier Smart Home Co Ltd; Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-08-04

Abstract

The invention discloses a water heater, which comprises a shell, a burner, a combustion chamber, a main heat exchanger, a fuel gas supply pipe, a fume collecting hood and a fan, and further comprises: a condensing heat exchanger and a drain assembly; the condensing heat exchanger comprises a heat exchange box body and a preheating pipe; the drainage assembly comprises a condensed water collecting box, a water level sensor, a drainage pipe and a heating and pressurizing module; the heating and pressurizing module comprises a gas tank, an electric heating part, a one-way valve and an electric control valve; the bottom of the combustion chamber is provided with a first air inlet cavity and a second air inlet cavity at intervals, the fan comprises a first fan and a second fan, and the fuel gas supply pipe is positioned in the first air inlet cavity. The use reliability of the gas water heater is improved, and the requirement of automatic discharge of condensed water is met.

Description

Water heater

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to a water heater.

Background

At present, the water heater is a household appliance commonly used in daily life of people. The water heater is classified into a gas water heater, an electric water heater, and the like, wherein the gas water heater is widely used because of its convenient use. Conventional gas water heaters typically include a burner that combusts gas in the combustion chamber to heat water flowing through the heat exchanger, a combustion chamber, a heat exchanger, and a smoke collection cover, where the smoke is discharged outdoors by a fan in the smoke collection cover.

After the gas water heater performs primary heat exchange, medium-temperature flue gas with the temperature of about 180 ℃ is usually generated, the medium-temperature flue gas has high content of CO2 and NOX and high content of water vapor with high heat energy, and if the gas water heater is directly discharged, the gas water heater not only pollutes the environment, but also causes a large amount of heat energy loss. The gas water heater adopts the condensation heat exchange device to perform secondary heat exchange, preheats water, recovers the latent heat of medium-temperature flue gas, improves the utilization rate of gas, and simultaneously greatly reduces the temperature of flue gas discharged outside the gas water heater. As the water vapor in the medium-temperature flue gas can be condensed into liquid condensed water while releasing latent heat, and acid gases such as CO2, NOX and the like in the flue gas can be dissolved in the condensed water, so that the flue gas is corrosive. For this reason, condensed water of the secondary heat exchange needs to be collected intensively for centralized treatment.

Chinese patent publication No. CN 217685851U discloses a gas water heater that collects condensed water by a condensed water container and conveys the condensed water to a nozzle by a water pump, and the nozzle sprays the condensed water into a smoke exhaust pipe to output following smoke. The water pump can be damaged due to corrosion of condensed water after long-time use, so that the use reliability is reduced. In view of this, how to design a gas water heater with high use reliability to meet the discharge of condensed water is a technical problem to be solved by the present invention.

Disclosure of Invention

The invention provides a water heater, which can improve the use reliability of the gas water heater and meet the requirement of automatic discharge of condensed water.

In order to achieve the technical purpose, the invention is realized by adopting the following technical scheme:

in one aspect, the invention provides a water heater, comprising a shell, a burner, a combustion chamber, a main heat exchanger, a gas supply pipe, a fume collecting hood and a fan, wherein a fume outlet pipeline is arranged outside the shell, and the water heater further comprises: a condensing heat exchanger and a drain assembly;

the condensing heat exchanger comprises a heat exchange box body and a preheating pipe, wherein a communication port is formed in the heat exchange box body, a smoke exhaust pipe is further arranged on the heat exchange box body, the preheating pipe is positioned in the heat exchange box body, and a water outlet is formed in the bottom of the heat exchange box body;

the drainage assembly comprises a condensed water collecting box, a water level sensor, a drainage pipe and a heating and pressurizing module; the heating and pressurizing module comprises a gas tank, an electric heating component, a one-way valve and an electric control valve, wherein the electric heating component is arranged on the gas tank, the one-way valve is arranged at the inlet of the gas tank, and the electric control valve is arranged at the outlet of the gas tank; the condensate water collecting box is provided with a condensate water inlet, a condensate water outlet and a supercharging air inlet, the water level sensor is arranged in the condensate water collecting box, the drain pipe is connected with the condensate water outlet, and the electric control valve is connected with the supercharging air inlet;

The bottom of the combustion chamber is provided with a first air inlet cavity and a second air inlet cavity at intervals, the fan comprises a first fan and a second fan, and the fuel gas supply pipe is positioned in the first air inlet cavity;

the combustion chamber is located in the combustion chamber, the main heat exchanger is arranged on the upper portion of the combustion chamber, the fume collecting hood covers the top of the main heat exchanger, the first fan is communicated with the first air inlet cavity, the second fan is communicated with the second air inlet cavity, a fume outlet of the fume collecting hood is connected with the communication port, the fume exhaust pipe is connected with the fume outlet channel, the water outlet is connected with the condensate water inlet, the water outlet pipe extends into the fume outlet pipe, and the one-way valve is connected with the air outlet side of the first fan through an air pipe.

Through additionally setting up drainage assembly, the comdenstion water collecting box that disposes in the drainage assembly can keep in the comdenstion water of discharging from the heat exchange box, and after the comdenstion water in the comdenstion water collecting box accumulated a certain amount, water level sensor detects the water level signal in order to trigger heating boost module and start, the air current of the certain wind pressure that the fan produced can be injected into to the gas pitcher that adds in the heating boost module, and further heat the gas pitcher through the electrical heating part in order to form higher pressure gas, when the comdenstion water in the comdenstion water collecting box is discharged, the automatically controlled valve is opened so that the high-pressure air current that heats boost module output increases the whole atmospheric pressure in the comdenstion water collecting box, finally with the comdenstion water in the comdenstion water collecting box in the drain pipe of being pressed to the outside of discharging from the play flue pipe under the effect of atmospheric pressure, the demand that does not need user's manual handling comdenstion water has been satisfied, can avoid long-time use because of the corruption of the equipment damage unable normal emission comdenstion water, realize improving gas heater's reliability of use, and satisfy the requirement of automatic emission.

In addition, through configuration two independent fans, the air current of first fan output forms primary air and mixes with the gas and enter into the combustor and burn, and the air current of second fan output forms secondary air and enters into the interior auxiliary burner of combustion chamber and burn, like this, in the in-service use, can carry out independent regulation to two fans according to the content of CO in the flue gas to accurate control one, the proportion of secondary air, and then ensure that the gas burns fully, reduced the energy consumption of gas heater.

In one embodiment of the present application, the electric heating element is a thick film wrapped around the outside of the gas tank.

In an embodiment of the present application, the electric heating component is an electric heating tube inserted in the gas tank.

In an embodiment of the present application, a pressure sensor is further disposed on the gas tank, and the pressure sensor is configured to trigger the electric heating component to be powered off; the water level sensor is configured to trigger the electrical heating component to energize.

In an embodiment of the application, be provided with ventilating board and baffle in the combustion chamber, be provided with a plurality of vents on the baffle, the baffle with ventilating board is in the bottom interval of combustion chamber forms first air inlet cavity and second air inlet cavity.

In this application an embodiment, the ventilation board includes first ventilation board and second ventilation board, be provided with a plurality of second ventilation holes on the second ventilation board, the second ventilation board is located the below of vent, first ventilation board is located the top of vent.

In an embodiment of the present application, the inside of comdenstion water collecting box is provided with the overflow plate, the overflow plate will the internal partition of comdenstion water collecting box is first cavity and second cavity, the comdenstion water import is arranged the top of comdenstion water collecting box and intercommunication first cavity, the comdenstion water export is arranged the bottom of comdenstion water collecting box and intercommunication the second cavity.

In an embodiment of the present application, an overflow port is formed between the overflow plate and the top of the condensed water collecting tank; the condensate water collecting box is internally provided with a one-way valve plate, the top of the one-way valve plate is rotatably arranged in the condensate water collecting box and is positioned above the overflow plate, and the one-way valve plate is configured to be lapped on the overflow plate after the pressure gas is injected into the second cavity so as to close the overflow port.

In an embodiment of the present application, the main heat exchanger includes a heat exchange tube and two end plates, where the two end plates are arranged opposite to each other, and the heat exchange tube penetrates through the two end plates;

The front panel and the rear panel of the combustion chamber are provided with upward extending extension parts, and a mounting area is formed between the two extension parts;

the main heat exchanger is arranged in the installation area, the extension part is connected with the lower edge of the fume collecting hood, and the end plate is connected between the fume collecting hood and the side plate on the corresponding side of the combustion chamber.

In one embodiment of the present application, the condensing heat exchanger is disposed on one side of the fume collection hood.

In one embodiment of the present application, the lower edge of the end plate is overlapped on the side plate of the corresponding side, and the upper edge of the end plate is overlapped on the lower edge of the fume collecting hood.

In one embodiment of the present application, the extension overlaps the lower edge of the fume collecting hood.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of a gas water heater according to an embodiment of the present invention;

FIG. 2 is an assembly view of a combustion chamber and a heat exchanger in an embodiment of the gas water heater of the present invention;

FIG. 3 is one of the schematic structural diagrams of the condensate collection tank of FIG. 1;

FIG. 4 is a second schematic diagram of the condensed water collecting tank shown in FIG. 1;

FIG. 5 is a longitudinal cross-sectional view of the primary heat exchanger of FIG. 1;

FIG. 6 is an enlarged partial schematic view of area A of FIG. 5;

FIG. 7 is a partially enlarged schematic illustration of region B of FIG. 5;

FIG. 8 is a longitudinal cross-sectional view of the primary heat exchanger of FIG. 1;

fig. 9 is an enlarged partial schematic view of region C in fig. 8.

Reference numerals illustrate:

the device comprises a shell 1, a water inlet pipe 11, a water outlet pipe 12 and a smoke outlet pipe 13;

a burner 2 and a gas supply pipe 21;

a main heat exchanger 3, heat exchange tubes 31, end plates 32, bypass tubes 33, and fins 34;

a combustion chamber 4, a front panel 401, a rear panel 402, and an extension 403;

partition 41, first ventilation plate 42, second ventilation plate 43, first plate 44, second plate 45, and third plate 46;

the first vent 421, the upper flange 422, the outer flange 423, the third vent 424, the second vent 431, the outer flange 441, the lower flange 442, the fourth vent 443;

fan 5, first fan 51, second fan 52;

A condensing heat exchanger 6;

a heat exchange case 61, a smoke exhaust pipe 62, and a water outlet 63;

a fume collecting hood 7; a drain assembly 8;

a condensed water collecting box 81, a drain pipe 82 and a heating and pressurizing module 83;

a condensate inlet 811, a condensate outlet 812, a boost air inlet 813, an overflow plate 814, a check valve plate 815;

a gas tank 831, an electric heating component 832, a one-way valve 833, and an electric control valve 834.

Description of the embodiments

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The gas water heater adopts gas as main energy material, and the high temperature heat generated by combustion of the gas is transferred to cold water flowing through a heat exchanger to achieve the purpose of preparing hot water.

Gas water heaters typically include a housing, and a burner, heat exchanger, fan, and smoke collection hood disposed within the housing.

The gas is conveyed to the burner, and is ignited by the ignition device, so that the burner combusts the conveyed gas, and heat is further generated.

The heat exchanger is internally provided with a heat exchange tube, one end of the heat exchange tube is communicated with a water supply pipeline, and the other end of the heat exchange tube is communicated with a shower head or a tap.

The heat generated by the combustion of the fuel gas by the burner is used for heating the heat exchange tube so as to raise the water temperature in the heat exchange tube to form hot water.

When the gas water heater works, cold water provided by the water supply pipeline flows into the heat exchange pipe, is heated into hot water by the heating source generated by the burner, and flows out of the shower head or the water tap through the hot water valve for users to use.

Meanwhile, in the operation of the gas water heater, the fans are electrified and run simultaneously, and under the action of the fans, the flue gas generated by the burner is discharged outdoors.

In a first embodiment, as shown in fig. 1 to 4, the present embodiment proposes a gas water heater, including:

the device comprises a shell 1, wherein a water inlet pipe 11 and a water outlet pipe 12 are arranged on the shell 1, and a smoke outlet pipeline 13 is further arranged outside the shell;

a burner 2, the burner 2 being for burning fuel gas;

the combustion chamber 4, the front panel 401 and the rear panel 402 of the combustion chamber 4 are provided with upward extending extensions 403, and a mounting area is formed between the two extensions 403;

the main heat exchanger 3, the main heat exchanger 3 includes a heat exchange tube 31 and two end plates 32, the two end plates 32 are arranged oppositely, and the heat exchange tube 31 penetrates the two end plates 32;

A fume collecting hood 7, wherein a fume outlet is arranged on the fume collecting hood;

the condensing heat exchanger 6, the condensing heat exchanger 6 comprises a heat exchange box 61 and a preheating pipe (not shown), a communication port is arranged on the heat exchange box 61, a smoke exhaust pipe 62 is also arranged on the heat exchange box 61, the preheating pipe is positioned in the heat exchange box 61, and a water outlet is arranged at the bottom of the heat exchange box;

a fan 5 configured to drive air into the combustion chamber and to cause smoke generated in the combustion chamber to be output from the smoke outlet;

the drainage assembly 8, the drainage assembly 8 comprises a condensed water collecting box 81, a water level sensor (not shown), a drain pipe 82 and a heating and pressurizing module 83, the heating and pressurizing module comprises a gas tank 831, an electric heating component 832, a one-way valve 833 and an electric control valve 834, the electric heating component is arranged on the gas tank, the one-way valve is arranged at an inlet of the gas tank, and the electric control valve is arranged at an outlet of the gas tank; the condensate water collecting box 81 is provided with a condensate water inlet 811, a condensate water outlet 812 and a supercharging air inlet 813, the water level sensor is arranged in the condensate water collecting box 81, the drain pipe 82 is connected with the condensate water outlet 812, and the air outlet of the air tank 831 is connected with the supercharging air inlet 813 through the electric control valve 834;

The combustion chamber 4, the main heat exchanger 3 and the burner 2 are arranged in the shell 1, the burner 2 is arranged at the bottom of the combustion chamber 4, an air inlet is arranged on the burner 2, and the burner 2 is used for combusting fuel gas; the main heat exchanger 3 is arranged on top of the combustion chamber 4, and the gas supply pipe 21 is provided with a plurality of gas nozzles, and the gas supply pipe 21 extends into the combustion chamber 4 and delivers gas to the burner 2 via the gas inlet through the gas nozzles.

The fume collecting hood 7 is arranged above the main heat exchanger 3; the exhaust port is connected with the communication port, the exhaust pipe is connected with the exhaust channel, the water outlet 63 is connected with the condensed water inlet 811, the water outlet 82 extends into the exhaust pipe 13, the heat exchange box 61 is arranged in the shell 1, the communication port is communicated with the exhaust port of the fume collecting hood 7, and the water inlet pipe 11 is connected with the heat exchange pipe 31 through the preheating pipe.

Specifically, for the condensing heat exchanger 6, it introduces the smoke collected by the smoke collecting hood 7 therein through the heat exchanging box 61 and outputs from the smoke discharging pipe 62. Meanwhile, the preheating pipe in the heat exchange box 61 is connected to the water inlet side of the heat exchange pipe 31, so that water entering the heat exchange pipe 31 can flow into the preheating pipe to be preheated by flue gas.

The heat exchange box 61 in the condensation heat exchanger 6 is communicated with the fume collecting hood 7, so that the fume can be output to the outside by the fume exhaust pipe 62 through the heat exchange box 61, and the preheating pipe is arranged in the heat exchange box 61 and can preheat the cold water flowing into the heat exchange pipe 31, so that the residual heat of the fume is fully utilized to heat the water flowing in the preheating pipe, and the utilization rate of the heat of the gas is improved.

And the condensing heat exchanger 6 will generate condensed water during use, which is collected in the heat exchange tank 61 and flows by gravity to the bottom condensed water collecting tank 81 through the bottom drain port 63 to collect temporary condensed water through the condensed water collecting tank 81.

During use by a user, the storage amount of condensate in the condensate collection tank 81 gradually increases, and the water level of the condensate collection tank 81 is detected by the water level sensor. And after the water level in the condensed water collecting tank 81 exceeds a set value, the water level sensor feeds back the detected signal to a controller of the gas water heater configuration, and the controller triggers the water discharging assembly 8 to start so as to perform water discharging treatment on the condensed water collecting tank 81.

The specific process is as follows: the water level sensor detects that the water level of the condensed water stored in the condensed water collecting box 81 exceeds a set value, and then sends a signal to the controller, and the controller controls the heating and pressurizing module 83 to start according to the sent signal. In the normal operation process of the gas water heater, part of air is pressurized and input into the air tank 831 through the check valve 833 under the action of the fan 7, so that a certain amount of pressure gas is stored in the air tank 831; after the heating and pressurizing module 83 is started, the electric heating component 832 is electrified to heat the gas stored in the gas tank 831, and after the gas is heated to a certain degree, the electric control valve 834 is opened. At this time, the gas stored in the gas tank 831 increases in pressure due to the increase in temperature, and after the electronic control valve 834 is opened, the high pressure gas in the gas tank 831 enters the condensed water collecting tank 81 to instantaneously increase the pressure in the condensed water collecting tank 81, and the condensed water in the condensed water collecting tank 81 flows upward along the drain pipe 82 under the action of the pressure and is finally output to the outside through the smoke outlet pipe 13, so as to realize automatic discharge of the condensed water.

The condensed water collecting box 81 is not directly provided with a water pump to realize the discharge of condensed water, but the air pressure in the condensed water collecting box is increased by using the injected air from the outside so as to press the condensed water out of the shell by using the air pressure, thereby avoiding the water discharge failure caused by corrosion of devices by the condensed water and further improving the use reliability.

In addition, in order to precisely control the supply amounts of primary air and secondary air, it is convenient to adjust the proportion of a secondary air. The blower 5 includes a first blower 51 and a second blower 52 to constitute a blower assembly by the first blower 51 and the second blower 52. The first fan 51 is used for outputting air flow to form primary air and mixing with fuel gas entering the combustor 2, and the second fan 52 is used for outputting air flow to directly enter a combustion cavity of the combustion chamber to form secondary air to assist combustion.

Correspondingly, a partition board 41 is vertically arranged in the combustion chamber 4, a plurality of ventilation openings (not marked) are arranged on the partition board 41, a first ventilation board 42 is arranged on one side of the partition board 41, a second ventilation board 43 is arranged on the other side of the partition board 41, a plurality of first ventilation holes 421 are arranged on the first ventilation board 42, a plurality of second ventilation holes 431 are arranged on the second ventilation board 43, the second ventilation board 43 is positioned below the ventilation openings, the first ventilation board 42 is positioned above the ventilation openings, a first air inlet (not marked) and a second air inlet (not marked) are arranged at the bottom of the combustion chamber 4, the partition board 41 is spaced between the first air inlet and the second air inlet, the first air inlet is positioned below the first ventilation board 42, and the second air inlet is positioned below the second ventilation board 43;

The burner 2 is arranged in the combustion chamber 4 and above the second ventilation plate 43, the air inlet is connected with the ventilation opening, the gas supply pipe 21 is arranged in the combustion chamber 4 and below the first ventilation plate 42, the air nozzle is arranged opposite to the corresponding ventilation opening, the partition 41 is arranged between the burner 2 and the gas supply pipe 21, the second fan 52 is connected with the second air inlet, and the first fan 51 is connected with the first air inlet.

The first ventilation plate 42 forms a first air inlet cavity at the bottom of the combustion chamber 4 on the other side of the partition plate 41, and the second ventilation plate 43 forms a second air inlet cavity at the bottom of the combustion chamber 4 on one side of the partition plate 41; a gas supply pipe 21 is located in the first air intake chamber. In use, the air flow output by the first fan 51 enters the first air inlet cavity, the air flow enters the burner 2 through the ventilation opening to form primary air, and the primary air is mixed with the fuel gas output by the air nozzle of the fuel gas supply pipe 21 in the burner 2 and finally output to be ignited for combustion.

The air flow output by the second fan 52 enters the second air inlet cavity, and enters the combustion cavity through a plurality of second air ventilation holes 431 formed in the second air ventilation plate 43 to form secondary air, and the secondary air is conveyed upwards from the bottom of the combustor 2 to assist the ignited fuel gas to be fully combusted in the combustion cavity.

Because the air flows output by the first fan 51 and the second fan 52 are mutually independent, the rotating speeds of the first fan 51 and the second fan 52 can be respectively and independently controlled, and the proportion of secondary air can be accurately regulated.

In addition, for the first ventilation plate 42, the first ventilation holes provided thereon are capable of delivering part of the air flow generated by the first fan 51 into the combustion chamber to form tertiary air. The arrangement of the first vent hole can perform pressure relief treatment on the air flow generated by the first fan 51 so as to better buffer wind pressure impact generated by independent air supply in the combustor 2, and ensure that the fuel gas completely enters the combustor 2 to be involved in combustion when the first fan 51 is started or wind speed is regulated, thus ensuring reliable operation of the combustor 2.

Through additionally setting up drainage assembly, the comdenstion water collecting box that disposes in the drainage assembly can keep in the comdenstion water of discharging from the heat transfer box to after the comdenstion water in the comdenstion water collecting box accumulated a certain amount, water level sensor detected the water level signal in order to trigger the air current pressure boost module and start, the air current pressure boost module will produce the air current of certain pressure and input in the comdenstion water collecting box, the high-pressure air current that utilizes the air current pressure boost module output increases the whole atmospheric pressure in the comdenstion water collecting box, the comdenstion water in the comdenstion water collecting box is pressed into the drain pipe under the effect of atmospheric pressure and is discharged outdoors from the play tobacco pipe at last, the demand that need not the manual processing comdenstion water of user has been satisfied promptly, can avoid again long-time use because of the comdenstion water corrodes and causes equipment damage unable normal drainage comdenstion water, realize improving gas heater's reliability in use, and satisfy the demand that comdenstion water automatic discharge.

Through configuration two independent fans, the air current of first fan output forms primary air and mixes with the gas and enter into the combustor and burn, and the air current of second fan output forms secondary air and enters into the interior auxiliary burner of combustion chamber and burn, like this, in the in-service use, can carry out independent regulation to two fans according to the content of CO in the flue gas to accurate control one, the proportion of secondary air, and then ensure that the gas burns fully, reduced the energy consumption of gas heater.

And the two fans are adopted to increase the overall air flow so as to overcome the air resistance of the flue gas entering the condensing heat exchanger 6 and additionally generated, thereby not only meeting the normal secondary heat exchange of the flue gas and the condensing heat exchanger 6, but also meeting the smooth output of the air flow.

Preferably, in order to more thoroughly drain the condensed water in the condensed water collecting tank 81 and shorten the start-up time of the heating and pressurizing module 83 to reduce the power consumption, a siphon pipe (not shown) may be additionally added to the nozzle of the drain pipe 82. The siphon pipe is connected to the drain pipe 82 and extends out of the room through the smoke outlet pipe 13, the free end of the siphon pipe is lower than the height of the condensate outlet 812 on the condensate collecting box 81, so that once condensate in the condensate collecting box 81 is discharged from the siphon pipe through the drain pipe 82, the siphon pipe can continuously suck the condensate in the condensate collecting box 81 by utilizing the siphon principle, and then the heating and pressurizing module 83 is not required to work all the time in the condensate discharging process so as to reduce energy consumption, and the condensate in the condensate collecting box 81 can be discharged more thoroughly and effectively under the siphon action.

In one embodiment, in order to compact the internal structure within the housing 1, the second fan 52 and the first fan 51 are arranged side by side in the front-rear direction of the housing 1.

Specifically, the first fan 51 and the second fan 52 are arranged side by side in the housing 1, and further the thickness space of the housing 1 can be fully utilized to simultaneously install the first fan 51 and the second fan 52, so that the internal structure is more compact, and the requirement of the miniaturized design of the gas water heater is met.

In another embodiment, to ensure secondary and tertiary air ratio distribution, the area of the second ventilation plate 43 is larger than the area of the first ventilation plate 42; the aperture ratio of the second ventilation plate 43 is larger than the aperture ratio of the first ventilation plate 42.

Specifically, the first ventilation plate 42 has a small area and a low aperture ratio so that most of the air flow generated by the first fan 51 enters the burner 2 to form primary air. The second ventilation plate 43 has a larger area and a higher aperture ratio, so as to ensure that the air flow generated by the second fan 52 can be uniformly distributed and smoothly enter the combustion cavity of the combustion chamber 4.

In another embodiment of the present application, in order to reduce the transfer of heat inside the combustion chamber 4 to the outside, in particular in order to avoid severe baking of the front panel of the casing 1. The inner side of the front plate of the combustion chamber 4 is provided with a first plate body 44, a first air interlayer (not marked) is formed between the first plate body 44 and the front plate, the edge of the first ventilation plate 42, which is close to the front plate, is provided with an upper folded edge 422, the top of the upper folded edge 422 is provided with an outward turned edge 423, and at least one row of third ventilation holes 424 are also formed in the outward turned edge 423;

The edge of the outward flange 423 abuts against the inner surface of the front plate, the lower edge of the first plate body 44 is located at the upper portion of the outward flange 423, and the third ventilation holes 424 are configured to blow air toward the inside of the first air interlayer.

In particular, since the high temperature smoke generated by the combustion of the burner 2 in the combustion chamber 4 radiates heat outside due to heat conduction, particularly the front panel of the housing 1 is generally a decorative panel, and it is necessary to avoid long-time high temperature baking. And through setting up first plate body 44 in the inside of combustion chamber 4, first plate body 44 forms first air intermediate layer with the front bezel of combustion chamber 4 to, utilize the air current that first fan 51 produced further through the export of third through hole and then enter into in the first air intermediate layer in order to form the cold air isolation layer, and then realize thermal-insulated effect.

And because the first fan 51 independently transmits air flow to the first air inlet cavity, the third through hole can output enough air flow to realize cold air isolation, and the heat insulation effect is optimized.

In one embodiment, the lower edge of the first plate body 44 is provided with an outer flange 441, the edge of the outer flange 441 is provided with a lower flange 442, the bottom of the lower flange 442 is abutted against the upper flange 422, and the outer flange 441 is blocked above the third ventilation hole 424.

Specifically, the outer flange 441 and the lower flange 442 cooperate to make the air flow output from the third ventilation hole 424 mainly serve to form air isolation at the first plate 44. In a preferred embodiment, the outer flange 441 is provided with a plurality of fourth vent holes 443. In use, a part of the airflow output from the third ventilation hole 424 is directly and severely conveyed to the surface of the first plate 44 outside the first air interlayer through the fourth ventilation hole 443 to form a first cold air isolation layer, and the rest of the airflow output from the third ventilation hole 424 enters the first air interlayer to form a second cold air isolation layer, so that the heat insulation capacity is improved more effectively.

Likewise, a second plate body 45 is provided on the inner side of the rear plate of the combustion chamber 4, a second air interlayer is formed between the second plate and the rear plate, the edge of the second ventilation plate 43 is abutted against the rear plate, the bottom of the second plate body 45 is abutted against the second ventilation plate 43, and the second ventilation holes 431 at the rear edge of the second ventilation plate 43 are also configured to blow air into the second air interlayer.

Specifically, for reducing heat leakage, the back of the casing 1 forms a second air interlayer with the rear plate of the combustion chamber 4 through the second plate 45, and forms a cold air isolation layer by delivering air through the second ventilation holes 431 corresponding to the bottom.

Similarly, the inner containers of the two side plates of the combustion chamber 4 are respectively provided with a third plate 46, and a third air interlayer is formed between the first upper plate and the corresponding side plate; the second ventilation holes 431 at both side edges of the second ventilation plate 43 are also configured to blow toward the inside of the third air interlayer, and the first ventilation holes 421 at both side edges of the first ventilation plate 42 are also configured to blow toward the inside of the third air interlayer.

By arranging the air interlayer region around the combustion chamber 4, heat conduction to the side wall of the combustion chamber 4 can be effectively reduced due to low heat conductivity of air in the air interlayer region, and finally, heat conduction to the shell 1 is reduced. Meanwhile, because the air in the air interlayer region is heated, the cold air at the bottom can quickly flow into the air interlayer region 100 by utilizing the principle of rising hot air, so that the heat in the air interlayer region is effectively taken away, and the heat dissipation efficiency is further effectively improved.

In one embodiment of the present application, the condensing heat exchanger 6 is arranged at one side of the fume collecting hood 7.

Specifically, by arranging the condensing heat exchanger 6 at one side of the fume collecting hood 7, various functional components are installed and distributed to fully utilize the inner space within the housing 1, so as to improve space utilization.

In one embodiment of the present application, the fume collecting hood 7 is provided with the fume exhaust port on the side surface, and the fume exhaust port is communicated with the communication port through a horizontally arranged fume flue.

Specifically, the smoke outlet is formed in the side face of the smoke collecting cover 7, so that the smoke is conveniently connected with the heat exchange box 61 on one side through the smoke channel, and the smoke is conveniently and rapidly conveyed into the heat exchange box 61 from the smoke collecting cover 7.

In another embodiment of the present application, the electrical heating element is a thick film wrapped around the outside of the gas tank; alternatively, the electric heating member is an electric heating tube inserted in the gas tank.

In some embodiments, a pressure sensor (not shown) is also provided on the gas tank, the pressure sensor configured to trigger the electrical heating component to be de-energized; the water level sensor is configured to trigger the electrical heating component to energize.

Specifically, during use, the pressure of the air flow generated by the fan 7 is limited, so that the pressure requirement of condensed water discharge cannot be met, and the air pressure needs to be increased by heating the air tank 831. In order to improve the safety and reliability of use, the electric heating component 832 is powered off to stop heating when the air pressure value in the air tank 831 is higher than the set air pressure value during the heating process, and at the same time, the electric control valve 834 is opened to enable the high pressure air in the air tank 831 to enter the condensed water collecting tank 81.

In some embodiments of the present application, the inside of the condensate water collecting tank 81 is provided with an overflow plate 814, the overflow plate 814 divides the inside of the condensate water collecting tank 81 into a first cavity and a second cavity, the condensate water inlet 811 is arranged at the top of the condensate water collecting tank 81 and communicates with the first cavity, and the condensate water outlet 812 is arranged at the bottom of the condensate water collecting tank 81 and communicates with the second cavity.

Specifically, by providing the overflow plate 814 inside the condensate collecting tank 81 to form the first cavity and the second cavity with two top portions communicated, the condensate inlet 811 is formed with an extension pipe (not labeled) extending downward, and then a water seal is formed in the first cavity when condensate flows into the first cavity to seal the pipe orifice of the extension pipe, so as to reduce the entry of flue gas into the condensate collecting tank 81. The water level sensor is disposed in the second cavity to check the water level, the volume of the first cavity is smaller than that of the second cavity, and the condensed water in the first cavity is higher than the overflow plate 84, so that the condensed water is mainly accumulated in the second cavity. In the process of discharging the condensed water, the air flow generated by the air tank 831 is injected into the second chamber to discharge the condensed water by using the air pressure.

In another embodiment, an overflow port is formed between the overflow plate 814 and the top of the condensate collection tank 81; the condensate collection tank 81 is provided with a check valve plate 815, and the top of the check valve plate 815 is rotatably disposed above the condensate collection tank 81 and the overflow plate 814, and the check valve plate 815 is configured to overlap the overflow plate 814 to close the overflow port after the pressure gas is injected into the second chamber.

Specifically, in order to reduce the pressure in the second cavity from being relieved due to the communication with the first cavity during the process of discharging the condensed water by using the air pressure, the condensed water collecting tank 81 is additionally provided with the one-way valve plate 815, and the one-way valve plate 815 can be turned and opened towards the second cavity.

In use, condensate overflows from the first cavity to push the check valve plate 815 open to flow into the second cavity. And after the air tank 831 injects air into the second cavity, the check valve plate 815 will closely lean against the upper edge of the overflow plate 814 under the action of air pressure, so as to close the overflow port, so as to ensure that the second cavity has enough air pressure to press out condensate water.

Based on the above embodiments, it is optional to reduce the manufacturing cost even further. As shown in fig. 2, the combustion chamber 3, the front panel 31 and the rear panel 32 of the combustion chamber 3 are provided with upwardly extending extensions 33, and a mounting area is formed between the two extensions 33.

The combustion chamber 3, the front panel 31 and the rear panel 32 of the combustion chamber 3 are provided with upwardly extending extensions 33, and a mounting area is formed between the extensions 33.

The burner 2, the combustion chamber 4, the main heat exchanger 3 and the fume collecting hood 7 are arranged in the shell 1, the burner 2 is arranged at the bottom of the combustion chamber 4, the main heat exchanger 3 is arranged in the installation area, and the fume collecting hood 7 is arranged above the main heat exchanger 3; extension 403 is connected to the lower edge of fume collecting hood 7, end plate 32 is connected between fume collecting hood 7 and the side plate of the corresponding side of combustion chamber 4, and heat exchange tube 31 is connected between water inlet tube 11 and water outlet tube 12.

Specifically, in the actual assembly process of the gas water heater of the embodiment, the main heat exchanger 3 is perforated on the two end plates 32 and the heat exchange tubes 31 are correspondingly inserted, so that the heat exchange tubes 31 are fixedly installed on the two end plates 32.

The main heat exchanger 3 is not provided with a separate housing as a whole, and therefore, when the main heat exchanger 3 is installed, the extension parts 403 formed on the front and rear sides of the combustion chamber 42 are used as front and rear plate bodies of the main heat exchanger 3, and the two extension parts 403 are spliced together with the two end plates in a tail-end manner to form a surrounding structure. In this way, the flue gases which are fed upwards in order to meet the combustion chamber 4 are guided between the two end plates 32 via the two extensions 403, so that the flue gases can exchange heat with the water flowing in the heat exchange tubes 31.

At the same time, the top of the main heat exchanger 3 is covered by the fume collecting hood 7. The fume collecting hood 7 is arranged at the top of the main heat exchanger 3, the left and right sides of the fume collecting hood 7 are to be connected with the end plates 32 of the main heat exchanger 3, and the front and rear sides of the fume collecting hood 7 are to be connected with the extension 403 extending upward of the combustion chamber 4, so that the fume is finally collected and uniformly discharged in the fume collecting hood 7.

The top through the front and back panel at the combustion chamber is provided with the extension that upwards lengthens to form the installation zone that is used for installing the main heat exchanger between two extension, when the complete machine equipment, install the main heat exchanger in the installation zone that two extension formed, two end plates and extension mutually support and form the surrounding structure and supply flue gas to carry and heat the heat exchange tube between two end plates, in addition, the effect that collects the flue gas and guide flue gas output is satisfied to the top of main heat exchanger is covered to the collection petticoat pipe, to main heat exchanger, it has cancelled shell structure, only adopt two end plates to support the installation heat exchange tube, the effectual overall structure form of simplifying main heat exchanger, realize that main heat exchanger among the gas heater does not have the casing and does not have the design of winding pipe, with the effectual overall structure of simplifying main heat exchanger, and then realize reducing gas heater's manufacturing cost.

Because the main heat exchanger adopts a design mode without a winding pipe and a shell, the winding pipe is omitted, the problem that the winding pipe part of the water tank is corroded due to the fact that part of underground water is used is solved, and the service life of the main heat exchanger is prolonged.

Because the main heat exchanger adopts a shell-free design mode, an independent shell is omitted, and the heat exchange tube 31 is directly inserted into the tool after the end plate is fixed during assembly, the main heat exchanger does not need to be placed in the heat exchanger shell, and the production efficiency is improved.

In an embodiment of the present application, the heat exchange tube 31 is further provided with a plurality of fins 34, and the fins 34 are located between the two end plates 32.

Specifically, in the actual assembly process, for the heat exchange tube 31, a tube expansion manner may be adopted to provide a plurality of fins 34 on the outside of the heat exchange tube 31, and the fins 34 and the heat exchange tube 31 have better heat conduction capability, and after the tube expansion is completed on the heat exchange tube 31, the heat exchange tube 31 is assembled on the two end plates 32.

Through increasing fin 34 on heat exchange tube 31, fin 34 heat exchange tube expand tube forms on heat exchange tube 31 and with heat exchange tube heat conduction connection, can increase the heat transfer area with the flue gas through fin 34, and then improves the whole heat exchange efficiency of main heat exchanger 3.

In one embodiment of the present application, the lower edge of the end plate 32 is overlapped on the side plate of the corresponding side, and the upper edge of the end plate 32 is overlapped on the lower edge of the fume collecting hood 7.

Specifically, in the actual assembly process, the upper and lower edges of the end plate 32 may be respectively overlapped with the side plate and the fume collecting hood 7 at the corresponding sides, and then the end plate 32 is connected with the side plate and the fume collecting hood 7 by screws.

The end plate 32 is fixedly mounted to the lower end portion of the end plate 32 by lap-joint connection of the end plate 32 with the side plate on the corresponding side of the combustion chamber 4, and the end plate 32 and the side plate form an overlapping region, so that leakage of smoke from a connection portion formed between the end plate 32 and the side plate is reduced, and air tightness is improved.

Likewise, the lower edge of the corresponding side of the fume collecting hood 7 is connected in a lap joint manner through the end plate 32 so as to fixedly mount the upper end part of the end plate 32, and the end plate 32 and the fume collecting hood 7 form an overlapping area so as to reduce the leakage of fume from the connecting part formed between the end plate 32 and the fume collecting hood 7 and further improve the air tightness.

In one embodiment of the present application, the extension 403 overlaps the lower edge of the fume collecting hood 7.

Specifically, the combustion chamber 4 and the smoke collecting hood 7 are connected and fixed by the extension 403 to each other, and the combustion chamber 4 and the smoke collecting hood 7 are connected and fixed. Similarly, the extension 403 is fastened by a screw after overlapping the hood 7.

Through carrying out overlap joint with the upper end of extension 403 and the lower limb of collection petticoat pipe 7 to realize realizing good fixed and sealed around main heat exchanger 3, and then need not to dispose independent casing to main heat exchanger 3 additionally, effectual simplification overall structure.

For gas water heaters, zero cold water pipes can be configured as needed. For this purpose, a zero-cooling water pipe may be provided on the housing 1 for the gas water heater with zero-cooling water function, which is also connected to the heat exchange pipe 31 via the preheating pipe.

Specifically, when the zero-cooling water pipe is connected through the pipeline, the zero-cooling water pipe is also connected with the heat exchange pipe 31 through the preheating pipe in the condensation heat exchanger 6 in the shell 1, so that water flowing from the zero-cooling water pipe flows into the heat exchange pipe 31 after being preheated through the preheating pipe.

By connecting the zero-cooling water pipe with the heat exchange pipe 31 through the preheating pipe, the waste heat of the flue gas can be fully utilized to heat the water in the zero-cooling water mode.

In an embodiment of the present application, the main heat exchanger 3 further comprises a bypass pipe 33, and the bypass pipe 33 is connected between both ends of the heat exchange pipe 31.

Specifically, the bypass pipe 33 is welded between both end portions of the heat exchange pipe 31, for example: holes may be formed in the tube walls of both end portions of the heat exchange tube 31, and then the bypass tube 33 is inserted into the corresponding holes to be welded.

Through connecting through the bypass pipe 33 at the both ends of heat exchange tube, the pipe diameter of bypass pipe 33 is less, can make partial cold water not pass through the flue gas heating of combustion chamber 4 to more effective regulation temperature.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. The utility model provides a water heater, includes shell, combustor, combustion chamber, main heat exchanger, gas supply pipe, collection petticoat pipe and fan, the outside of shell is provided with out the cigarette pipeline, its characterized in that still includes: a condensing heat exchanger and a drain assembly;

2. The water heater of claim 1, wherein the electrical heating element is a thick film wrapped around the exterior of the tank; alternatively, the electric heating member is an electric heating tube inserted in the gas tank.

3. The water heater of claim 1, wherein a pressure sensor is further provided on the gas tank, the pressure sensor configured to trigger de-energization of the electrical heating component; the water level sensor is configured to trigger the electrical heating component to energize.

4. The water heater of claim 1, wherein a ventilation plate and a partition are disposed in the combustion chamber, a plurality of ventilation openings are disposed in the partition, and the partition and the ventilation plate form a first air intake cavity and a second air intake cavity at intervals at the bottom of the combustion chamber.

5. The water heater of claim 4, wherein the vent plate comprises a first vent plate and a second vent plate, wherein the second vent plate is provided with a plurality of second vent holes, the second vent plate is positioned below the vent, and the first vent plate is positioned above the vent.

6. The water heater according to claim 1, wherein an overflow plate is provided inside the condensate water collecting tank, the overflow plate divides the inside of the condensate water collecting tank into a first cavity and a second cavity, the condensate water inlet is arranged at the top of the condensate water collecting tank and communicates with the first cavity, and the condensate water outlet is arranged at the bottom of the condensate water collecting tank and communicates with the second cavity.

7. The water heater according to claim 6, wherein an overflow port is formed between the overflow plate and the top of the condensate collection tank; the condensate water collecting box is internally provided with a one-way valve plate, the top of the one-way valve plate is rotatably arranged in the condensate water collecting box and is positioned above the overflow plate, and the one-way valve plate is configured to be lapped on the overflow plate after the pressure gas is injected into the second cavity so as to close the overflow port.

8. A water heater according to any one of claims 1 to 7, wherein the primary heat exchanger comprises a heat exchange tube and two end plates, the two end plates being arranged opposite each other, the heat exchange tube passing through both end plates;

9. The water heater of claim 8, wherein the condensing heat exchanger is disposed on a side of the fume collection hood.

10. The water heater of claim 8, wherein a lower edge of the end plate overlaps the side plate on the corresponding side, an upper edge of the end plate overlaps a lower edge of the fume collection hood, and the extension overlaps the lower edge of the fume collection hood.