CN116558118A - Gas water heating equipment - Google Patents

Abstract

The invention discloses a gas water heating device, comprising: the heat exchange device comprises a shell, a combustor, a combustion chamber, a main heat exchanger, a smoke collecting hood, a condensing heat exchanger, a fan and a drainage component, wherein 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, and the heating and pressurizing module comprises a turbocharger and an electric control valve; 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 air outlet of the turbocharger is connected with the supercharging air inlet through the electric control valve. The use reliability of the gas water heating equipment is improved, and the requirement of automatic discharge of condensed water is met.

Description

Gas water heating equipment

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to gas water heating equipment.

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 condensation type 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 condensing type discharge is the technical problem to be solved by the invention.

Disclosure of Invention

The invention provides a gas water heating device, which can improve the use reliability of the gas water heating device 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 present invention provides a gas water heating apparatus comprising:

the shell is provided with a smoke outlet pipeline outside;

a burner for combusting a fuel gas;

a combustion chamber in which a combustion cavity is formed;

a main heat exchanger;

a smoke collecting cover, wherein a smoke outlet is arranged on the smoke collecting cover;

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;

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

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 combustion chamber and the fan are arranged in the shell, the burner is positioned 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 fume exhaust port 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 pipeline, and the one-way valve is connected with the air outlet side of the 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 the reliability of gas water heater's use, and satisfy the requirement of automatic emission.

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 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 an embodiment of the present application, the side of collection petticoat pipe is provided with the exhaust port, the exhaust port through the transversely arranged flue with the intercommunication mouth intercommunication.

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.

In an embodiment of the present application, the main heat exchanger further includes a bypass pipe, and the bypass pipe is connected between two ends of the heat exchange tube.

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 view of an embodiment of a gas water heating apparatus according to the present invention;

FIG. 2 is an assembly view of a combustion chamber, heat exchanger, fume collection hood and condensing heat exchanger in an embodiment of the gas water heating apparatus 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 schematic view of the main heat exchanger of fig. 1.

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;

a combustion chamber 3, a front panel 31, a rear panel 32, an extension 33, a heat insulating layer 34;

a main heat exchanger 4, heat exchange tubes 41, end plates 42, bypass tubes 43, and fins 44;

a fume collecting hood 5;

a condensing heat exchanger 6;

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

a fan 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 uses gas as main energy source material, and the high-temperature heat produced by combustion of gas is transferred into cold water flowing through heat exchanger so as to attain the goal of preparing hot water.

Gas water heating apparatuses generally include a housing, and a burner, a heat exchanger, a fan, a smoke collecting hood, and the like disposed in 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 heating equipment 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 tap through the hot water valve for users to use.

Meanwhile, in the operation of the gas water heating equipment, 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 heating apparatus, 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 3, the front panel 31 and the rear panel 32 of the combustion chamber 3 are provided with upward extending extensions 33, and a mounting area is formed between the two extensions 33;

the main heat exchanger 4, the main heat exchanger 4 includes a heat exchange tube 41 and two end plates 42, the two end plates 42 are arranged oppositely, and the heat exchange tube 41 penetrates through the two end plates 42;

a fume collecting hood 5, 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 7 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;

wherein the burner 2, the combustion chamber 3, the main heat exchanger 4 and the fume collecting hood 5 are arranged in the shell 1, the burner 2 is arranged at the bottom of the combustion chamber 3, the main heat exchanger 4 is arranged in the installation area, and the fume collecting hood 5 is arranged above the main heat exchanger 4; the exhaust port is connected with the communication port, the exhaust pipe 62 is connected with the exhaust pipe 13, 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 5, the water inlet pipe 11 is connected with the heat exchange pipe 41 through the preheating pipe, and the one-way valve is connected with the air outlet side of the fan through the air pipe.

Specifically, for the condensing heat exchanger 6, it introduces the smoke collected by the smoke collecting hood 5 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 41, so that water entering the heat exchange pipe 41 can flow into the preheating pipe to be preheated by the flue gas.

The heat exchange box 61 in the condensation heat exchanger 6 is communicated with the fume collecting hood 5, 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 41, 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 fume is further 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 heating device 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 heating equipment, part of air is pressurized and input into the air tank 831 through the one-way 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.

And after the condensed water in the condensed water collecting tank 81 is discharged under the action of air pressure, the water level sensor detects that the water level in the condensed water collecting tank 81 is lower than a set value, the controller controls the electric control valve 834 to be closed again, and meanwhile, the electric heating component 832 is powered off.

The condensed water collecting box 81 does not directly add a water pump to realize the discharge of condensed water, but utilizes the injected air from the outside to increase the air pressure in the condensed water collecting box so as to extrude the condensed water to the outside of the shell by utilizing the air pressure, thereby avoiding the water discharge failure caused by corrosion of devices by the condensed water and further improving the use reliability.

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 heating pressurization module and start, in the heating pressurization module will produce the air current of certain pressure input to the comdenstion water collecting box, utilize the high-pressure air current that heating pressurization module output to increase 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 finally discharged outdoors from the play tobacco pipe, 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 water heating equipment's reliability in use, and satisfy the demand that comdenstion water automatic discharge was done.

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 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 one embodiment of the present application, the condensing heat exchanger 6 is arranged at one side of the fume collecting hood 5.

Specifically, by arranging the condensing heat exchanger 6 at one side of the fume collecting hood 5, various functional components are installed and distributed to fully utilize the inner space within the housing 1, so that space utilization is improved.

In one embodiment of the present application, the fume collecting hood 5 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 5, 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 5.

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. 5, 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.

Wherein the burner 2, the combustion chamber 3, the main heat exchanger 4 and the fume collecting hood 5 are arranged in the shell 1, the burner 2 is arranged at the bottom of the combustion chamber 3, the main heat exchanger 4 is arranged in the installation area, and the fume collecting hood 5 is arranged above the main heat exchanger 4; the extension 33 is connected with the lower edge of the fume collecting hood 5, the end plate 42 is connected between the fume collecting hood 5 and the side plate on the corresponding side of the combustion chamber 3, and the heat exchange tube 41 is connected between the water inlet tube 11 and the water outlet tube 12.

Specifically, in the actual assembly process of the gas water heating apparatus of this embodiment, the main heat exchanger 4 is perforated on the two end plates 42 and the heat exchange tubes 41 are inserted correspondingly, so that the heat exchange tubes 41 are fixedly mounted on the two end plates 42.

The main heat exchanger 4 is not provided with a separate housing as a whole, and therefore, when the main heat exchanger 4 is installed, the extending parts 33 formed on the front and rear sides of the combustion chamber 32 are used as front and rear plate bodies of the main heat exchanger 4, and the two extending parts 33 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 3 are guided between the two end plates 42 via the two extensions 33, so that the flue gases can exchange heat with the water flowing in the heat exchange tubes 41.

At the same time, the top of the main heat exchanger 4 is covered by the fume collecting hood 5. The fume collecting hood 5 is arranged at the top of the main heat exchanger 4, the left and right sides of the fume collecting hood 5 will be connected with the end plates 42 of the main heat exchanger 4, and the front and rear sides of the fume collecting hood 5 will be connected with the extension 33 extending upward of the combustion chamber 3, so that the fume is finally collected and discharged uniformly in the fume collecting hood 5.

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 water heater does not have the design of casing around the pipe, with the effectual overall structure of simplifying main heat exchanger, and then realize reducing gas water 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, the heat exchange tube 41 is directly inserted into the tool after the end plate is fixed during assembly, the heat exchange tube is not required 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 41 is further provided with a plurality of fins 44, and the fins 44 are located between the two end plates 42.

Specifically, in the actual assembly process, for the heat exchange tube 41, a tube expansion manner may be adopted to provide a plurality of fins 44 on the outside of the heat exchange tube 41, and the fins 44 and the heat exchange tube 41 have better heat conduction capability, and after the tube expansion is completed on the heat exchange tube 41, the heat exchange tube 41 is assembled on the two end plates 42.

By adding the fins 44 on the heat exchange tube 41, the expansion tube of the fin 44 heat exchange tube is formed on the heat exchange tube 41 and is in heat conduction connection with the heat exchange tube, and the heat exchange area of the fin 44 and the flue gas can be increased, so that the overall heat exchange efficiency of the main heat exchanger 4 is improved.

In one embodiment of the present application, the lower edge of the end plate 42 is overlapped on the side plate of the corresponding side, and the upper edge of the end plate 42 is overlapped on the lower edge of the fume collecting hood 5.

Specifically, in the actual assembly process, the upper and lower edges of the end plate 42 may be respectively overlapped with the side plate and the smoke collecting hood 5 at the corresponding sides, and then the end plate 42 is connected with the side plate and the smoke collecting hood 5 by screws.

The end plate 42 is fixedly mounted to the lower end portion of the end plate 42 by lap-joint connection of the end plate 42 with the side plate on the corresponding side of the combustion chamber 3, and the end plate 42 and the side plate form an overlapping region to reduce leakage of smoke from the connection portion formed between the end plate 42 and the side plate, thereby improving air tightness.

Likewise, the lower edge of the corresponding side of the fume collecting hood 5 is lapped and connected through the end plate 42 so as to fixedly mount the upper end part of the end plate 42, and the end plate 42 and the fume collecting hood 5 form an overlapping area so as to reduce the leakage of fume from the connecting part formed between the end plate 42 and the fume collecting hood 5 and further improve the air tightness.

In one embodiment of the present application, the extension 33 overlaps the lower edge of the hood 5.

Specifically, the combustion chamber 3 and the smoke collecting hood 5 are connected and fixed by the extension 33 to each other. Similarly, the extension 33 is fastened by screws after overlapping the hood 5.

Through carrying out overlap joint with the upper end of extension 33 and the lower limb of collection petticoat pipe 5 to realize realizing good fixed and sealed around main heat exchanger 4, and then need not to dispose independent casing to main heat exchanger 4 additionally, effectual simplification overall structure.

In one embodiment of the present application, the inner surface of the combustion chamber 3 is provided with a thermal insulation layer 34.

Specifically, since the gas burned by the burner 2 generates high temperature flue gas in the combustion chamber 3, the high temperature flue gas will generate heat radiation to the periphery of the combustion chamber 3. The heat insulation layer 34 is used for protecting the inner wall of the combustion chamber 3 in a heat insulation way, so that on one hand, the overheating of the shell 1 caused by heat conduction outwards of the combustion chamber 3 is avoided, and on the other hand, the heat insulation layer 34 is used for reducing the leakage of the heat of the flue gas, so that the heating efficiency of the flue gas on the heat exchange tube 41 is improved, and the energy utilization is improved.

For gas water heating plants, it may be provided with zero cold water pipes as required. For this purpose, a zero-cold water pipe can also be provided on the housing 1 for the gas water heating system with zero-cold water function, which is also connected to the heat exchange pipe 41 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 41 through the preheating pipe in the condensation heat exchanger 6 in the shell 1, so that the water flowing from the zero-cooling water pipe flows into the heat exchange pipe 41 after being preheated through the preheating pipe.

By connecting the zero-cooling water pipe with the heat exchange pipe 41 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 4 further includes a bypass pipe 43, and the bypass pipe 43 is connected between both ends of the heat exchange pipe 41.

Specifically, the bypass pipe 43 is welded between both end portions of the heat exchange pipe 41, for example: holes may be formed in the wall of both ends of the heat exchange tube 41, and then the bypass tube 43 is inserted into the corresponding holes to be welded.

Through the connection of the two ends of the heat exchange pipe through the bypass pipe 43, the pipe diameter of the bypass pipe 43 is smaller, so that part of cold water does not pass through the flue gas heating of the combustion chamber 3, and the water temperature can be adjusted more effectively.

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 (10)

1. A gas water heating apparatus, comprising:

the shell is provided with a smoke outlet pipeline outside;

a burner for combusting a fuel gas;

a combustion chamber in which a combustion cavity is formed;

a main heat exchanger;

a smoke collecting cover, wherein a smoke outlet is arranged on the smoke collecting cover;

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;

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

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 combustion chamber and the fan are arranged in the shell, the burner is positioned 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 fume exhaust port 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 pipeline, and the one-way valve is connected with the air outlet side of the fan through an air pipe.

2. A gas water heating apparatus as claimed in claim 1, wherein the electrical heating means is a thick film wrapped around the outside of the tank; alternatively, the electric heating member is an electric heating tube inserted in the gas tank.

3. A gas water heating apparatus as claimed in claim 1, wherein a pressure sensor is also provided on the gas tank, the pressure sensor being configured to trigger de-energization of the electrical heating element; the water level sensor is configured to trigger the electrical heating component to energize.

4. A gas water heating apparatus according to claim 1, wherein an overflow plate is provided inside the condensate water collecting tank, the overflow plate dividing the inside of the condensate water collecting tank into a first cavity and a second cavity, the condensate water inlet being arranged at the top of the condensate water collecting tank and communicating with the first cavity, and the condensate water outlet being arranged at the bottom of the condensate water collecting tank and communicating with the second cavity.

5. The gas water heating apparatus according to claim 4, 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.

6. A gas water heating apparatus according to any one of claims 1-5, wherein the main 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 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.

7. A gas water heating apparatus as claimed in claim 6, wherein the condensing heat exchanger is arranged on one side of the fume collecting hood.

8. A gas water heating apparatus according to claim 7, wherein the fume collecting hood is provided with the fume outlet on a side thereof, the fume outlet being in communication with the communication port through a transversely arranged fume duct.

9. A gas water heating apparatus as claimed in claim 6, wherein the lower edge of the end plate overlaps the side plate on the corresponding side and the upper edge of the end plate overlaps the lower edge of the fume collecting hood.

10. A gas water heating apparatus as claimed in claim 6, wherein the extension overlaps the lower edge of the fume collecting hood.