CN113237219A - Electric heating module for gas water heater and gas water heater - Google Patents

Abstract

The invention discloses an electric heating module for a gas water heater and the gas water heater, wherein the electric heating module for the gas water heater comprises: the heating device comprises a heating container, a first connecting port, a second connecting port and a mounting port are arranged on the heating container, a first water pipe is arranged on the first connecting port, and a second water pipe is arranged on the second connecting port; an electric heating part for heating water in the heating container by electrifying; a scale inhibiting assembly configured with a scale inhibiting material, the scale inhibiting assembly disposed in the mounting opening. The scale inhibiting component is arranged in the heating container to achieve the effect of inhibiting scale, so that the heating efficiency of the electric heating module is improved to improve the overall working efficiency of the gas water heater.

Description

Electric heating module for gas water heater and gas water heater

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to an electric heating module for a gas water heater and the gas water heater.

Background

At present, a gas water heater is a household appliance commonly used in daily life of people, and generally comprises a shell, a burner, a heat exchanger and other components arranged in the shell, wherein a water inlet pipe and a water outlet pipe arranged on the shell are connected with the heat exchanger, and cold water entering from a water inlet pipe can be heated by the heat exchanger and then can be output from a water outlet pipe.

However, when the gas water heater is started, part of cold water in a pipeline of the hot gas water heater cannot be heated, and a certain amount of cold water needs to flow out firstly when the gas water heater is started, so that the waiting time of a user is long. Publication No. CN 109297179A discloses an electric auxiliary preheating circulation gas water heater, a preheating circulation system and a control method, wherein an intelligent heating module is configured on an water outlet pipeline to assist in heating water flowing in the water outlet pipeline. However, due to the influence of water, scale is easily generated in the heater module after the heater module is used for a certain period of time, and the heating efficiency of the heater module is further reduced.

In view of this, how to design a water heater with scale inhibition function to improve heating efficiency is the technical problem to be solved by the invention.

Disclosure of Invention

The invention provides an electric heating module for a gas water heater and the gas water heater, wherein a scale inhibiting component is arranged in a heating container to achieve the effect of inhibiting scale, and the heating efficiency of the electric heating module is improved to improve the overall working efficiency of the gas water heater.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

in one aspect, the present invention provides an electric heating module for a gas water heater, comprising:

the heating device comprises a heating container, a first connecting port, a second connecting port and a mounting port are arranged on the heating container, a first water pipe is arranged on the first connecting port, and a second water pipe is arranged on the second connecting port;

an electric heating part for heating water in the heating container by electrifying;

a scale inhibiting assembly configured with a scale inhibiting material, the scale inhibiting assembly disposed in the mounting opening.

In one embodiment of the present application, the scale inhibiting assembly includes a mounting pipe, a first end portion of the mounting pipe is provided with a water permeable hole, the scale inhibiting material is filled in the mounting pipe, the mounting pipe is disposed in the mounting opening, and the water permeable hole is located inside the heating container.

In an embodiment of the present application, a pipe orifice is disposed at the second end of the mounting pipe, and the scale inhibiting assembly further includes a sealing cap, wherein the sealing cap is detachably disposed at the second end of the mounting pipe and is used for opening and closing the pipe orifice; the sealing cap is located outside the heating vessel.

In an embodiment of the present application, the first connection port, the second connection port, and the mounting port are disposed on a side wall of the heating container; one end of the heating container is provided with a detachable end cover, and the electric heating part is arranged on the end cover.

In an embodiment of the present application, the electric heating part is an electric heating pipe, and a portion of the electric heating pipe located in the heating container forms a spiral pipe section.

In an embodiment of the present application, the terminal of the electric heating member extends to the outside of the end cap.

In an embodiment of the application, the end cover is further provided with a temperature controller, and the temperature controller is electrically connected with the wiring terminal of the electric heating component.

In an embodiment of the application, the end of the heating container is further provided with a protective cover, and the protective cover covers the wiring terminal and the temperature controller.

In one embodiment of the present application, the electric heating part is a thick film, and the thick film is wrapped on the outside of the heating container.

In another aspect, the present invention also provides a gas water heater comprising:

the water inlet pipe and the water outlet pipe extend to the outside;

a burner for burning a combustible gas;

a heat exchanger for supplying water to flow and heating water using heat generated from the burner;

the electric heating module adopts the electric heating module;

the water inlet pipe and the water outlet pipe are respectively connected with the heat exchanger to form a heating water flow path, and a heating container connected with the electric heating module is connected in the heating water flow path.

Compared with the prior art, the invention has the advantages and positive effects that:

the scale inhibiting component is added in the heating container, and the scale inhibiting material is configured in the scale inhibiting component, so that the scale inhibiting material in the scale inhibiting component can be contacted with water in the heating container, the water quality in the heating container is further improved, the scale inhibiting material plays a role in dispersing calcium carbonate crystals generated in the heating container, the crystals grow slowly, and the generation of scale is effectively inhibited; meanwhile, the scale inhibiting material can also improve the water using condition and improve the quality of discharged water, so that the electric heating component in the heating container keeps clean, the electric heating component can keep good heating heat conduction capability for a long time, and the heating efficiency of the electric heating module is improved so as to improve the overall working efficiency of the gas water heater.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of an electric heating module according to the present invention;

FIG. 2 is a second schematic structural view of an embodiment of an electric heating module according to the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of a portion of an embodiment of an electric heating module of the present invention;

FIG. 5 is a schematic structural view of an embodiment of the gas water heater of the present invention;

FIG. 6 is a schematic view of a portion of a gas water heater according to an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion B of FIG. 6;

FIG. 8 is one of the flow charts of another embodiment of the gas water heater of the present invention;

fig. 9 is a second flowchart of another embodiment of the gas water heater of the present invention.

Reference numerals:

a housing 100;

a water inlet pipe 101, a water outlet pipe 102, a fan 103 and a water pump 104;

a bypass pipe 1000, a first connection pipe 1011, a second connection pipe 1021;

a combustor 200;

a heat exchanger 300;

an electrical heating module 400;

heating the container 1;

the device comprises a first connecting port 11, a second connecting port 12, a mounting port 13, a first water pipe 14, a second water pipe 15, a heating cylinder 16 and an end cover 17;

an electric heating part 2;

a scale inhibiting component 3;

the mounting pipe 31, the water permeable hole 32 and the sealing cap 33;

a protective cover 4;

a temperature controller 5;

the electronic control box 500.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are 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 device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

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

The gas water heater generally includes a housing, and a burner, a heat exchanger, a fan housing, and the like disposed in the housing.

Wherein, the gas is carried to combustor department, ignites the gas through ignition to make the combustor burn to the gas of carrying, and then produce the heat.

A heat exchange tube is arranged in the heat exchanger, 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 water faucet and the like.

The heat generated by the combustion of the gas by the burner is used for heating the heat exchange pipe, so that the water temperature in the heat exchange pipe is increased 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 then flows out from the shower head or the water faucet through the hot water valve for users to use.

Meanwhile, when the gas water heater works, the fan is electrified and runs simultaneously, and smoke generated by the combustor is discharged outdoors under the action of the fan.

For the housing, the material of the housing may be a metallic material, such as: the low carbon steel after the surface is sprayed with plastics, the low carbon steel is also called mild steel, and the low carbon steel has the advantage of high temperature resistance. In the working process of the gas water heater, even if heat generated in the gas water heater is conducted to the shell, the shell is not easy to be damaged due to the adoption of high-temperature-resistant materials, and the service life of the gas water heater is prolonged.

The low carbon steel surface after the spraying plastics is handled is formed with the one deck and moulds the membrane, moulds the membrane and makes the shell have insulating ability, so can effectually prevent that the condition of electric leakage from appearing in gas heater. It will be appreciated that the material of the housing may be a non-metallic material, for example, but not limited to metallic materials, and may be different depending on the particular application. Alternatively, a glass panel or other components may be disposed outside the housing, which is not limited or described herein.

The shell is roughly square, so, when making gas heater more pleasing to the eye in appearance, can be so that gas heater's structure is compacter, is favorable to gas heater's miniaturization. It is understood that in other embodiments, the housing may have other shapes, such as circular, polygonal, etc.

In the case of burners, which are used for burning gas, they generally comprise a housing and a plurality of fire rows, which are arranged in the housing. The casing generally adopts the sheet metal component processing to form and is used for installing the fire row, and the gas is carried to the combustor in and is arranged the output through a plurality of fires and carry out the burning.

For heat exchangers, the heat exchanger is typically configured with heat exchange tubes arranged above the combustion chamber. High-temperature flue gas generated by the burner flows through the surface of the heat exchange tube to heat water flowing through the heat exchange tube.

For the fan cover, the fan cover is arranged above the heat exchanger to collect the smoke; for the fan, it is arranged at the bottom of the combustion chamber to deliver air into the combustion chamber.

The specific structural form and installation manner of the burner, the heat exchanger, the fan and the fan housing are not limited and described herein.

As shown in fig. 1 to 4, the gas water heater of the present embodiment includes a housing 100, a burner 200, a heat exchanger 300, and other components, wherein an installation space is formed inside the housing 100, and the housing 100 is further provided with a water inlet pipe 101 and a water outlet pipe 102 extending to the outside; the burner 200 is used to burn combustible gas; the heat exchanger 300 serves to flow water and heat water using heat generated from the burner 200.

Wherein, an electric heating module 400 is additionally arranged in the housing 100, and an electric heating flow channel is formed in the electric heating module 400. The electric heating flow passage is connected in series in the heating water flow passage.

And an electrical heating module 400 comprising:

the heating device comprises a heating container 1, wherein a first connecting port 11, a second connecting port 12 and a mounting port 13 are arranged on the heating container 1, a first water pipe 14 is arranged on the first connecting port 11, and a second water pipe 15 is arranged on the second connecting port 12;

an electric heating part 2, wherein the electric heating part 2 is used for heating water in the electric heating container 1;

the scale inhibiting component 3, the scale inhibiting component 3 is provided with a scale inhibiting material, and the scale inhibiting component 3 is arranged in the mounting opening 13.

Specifically, water entering the gas water heater flows into the heating container 1 through the first water pipe, and the heating container 1 is filled with water to soak the scale inhibiting material in the scale inhibiting component 3, and the scale inhibiting material can play a scale inhibiting role on the water in the heating container 1, so that scale generation on the inner wall of the heating container 1 is reduced.

As the electric heating member 2, an electric heating tube built in the heating container 1 may be used, or a thick film wrapped outside the heating container 1 may be used. In the case of using an electric heating tube as the electric heating part 2, the scale inhibiting component 3 can also reduce the scale formation on the surface of the electric heating part 2, so as to ensure that good heating and heat conducting capabilities are maintained.

In some embodiments, the scale inhibiting material may be selected from materials having scale inhibiting properties according to conventional techniques, such as: the scale inhibiting material can be silicon-phosphorus crystal, which is a small ball of glass difficult to dissolve in water and synthesized by food-grade polymeric phosphate composite preparation through a special process, can slowly release a high-efficiency scale inhibitor, can prevent the combination of calcium, magnesium ions and anions, and does not form scale. The silicon-phosphorus crystal can form a monocyclic or bicyclic chelate with calcium, magnesium and iron ions to seal the calcium and magnesium ions, so that scale is not formed any more, the scale prevention effect is achieved, solid (scale) generated on the inner wall of the heating container 1 is re-dispersed into water, the scale is gradually reduced, and the internal structure of the heating container 1 is cleaned.

In one embodiment of the present application, the scale inhibiting assembly 3 includes a mounting tube 31, a first end portion of the mounting tube 31 is provided with a water permeable hole 32, the scale inhibiting material is filled in the mounting tube 31, the mounting tube 31 is disposed in the mounting port 13, and the water permeable hole 32 is located inside the heating container 1.

Specifically, in order to conveniently contain the scale inhibiting material and meet the installation requirement of the scale inhibiting component 3, the scale inhibiting material can be contained by adopting a mode of installing the pipe 31. After the scale inhibiting material is filled into the installation tube 31, the installation tube 31 is sealingly inserted into the installation opening 13 to complete the installation of the scale inhibiting assembly 3.

Since the scale inhibiting material is in the form of particles, the size of the openings of the water permeable holes 32 is smaller than the size of the particles of the scale inhibiting material, so that the water permeable holes 32 meet the requirement of contacting water with the scale inhibiting material and the scale inhibiting material is prevented from leaking out of the water permeable holes 32 of the mounting pipe 31.

In use, water in the heating container 1 enters the installation pipe 31 through the water permeable holes 32 and contacts with the scale inhibiting material, so that the water quality is improved through the scale inhibiting material, and the scale inhibiting effect is achieved.

In one embodiment, in order to facilitate later maintenance of the scale inhibiting material, a pipe orifice is arranged at the second end of the mounting pipe 31, the scale inhibiting assembly 3 further comprises a sealing cap 33, and the sealing cap 33 is detachably arranged at the second end of the mounting pipe 31 and used for opening and closing the pipe orifice; the sealing cap 33 is located outside the heating container 1.

Specifically, when the scale inhibiting material is added, the sealing cap 33 is opened to add the scale inhibiting material into the installation tube 31 from the nozzle of the installation tube 31, and then the sealing cap 33 is coupled to the installation tube 31 to seal the nozzle of the installation tube 31.

After a period of use, when the scale inhibiting material needs to be replaced, the sealing cap 33 is removed, the scale inhibiting material in the installation pipe 31 is cleaned, and then the new scale inhibiting material is replaced, so that the scale inhibiting protection of the heating container 1 can be continuously carried out through the scale inhibiting component 3.

In one embodiment, the heating vessel 1 includes a heating cartridge 16 and end caps 17 at both ends. The end cap 17 is hermetically connected to the corresponding port portion of the heating cylinder 16. The first connection port 11, the second connection port 12 and the mounting port 13 are arranged on a side wall of the heating cylinder 16; the electric heating part 2 is in the form of a heating tube, and the electric heating part 2 is arranged on one end cover 17.

At the time of assembly, the end cap 17 to which the electric heating part 2 is mounted on the end of the heating cylinder 16 to complete the assembly. The first connecting port 11, the second connecting port 12 and the mounting port 13 are arranged on the side wall of the heating cylinder 16, so that the pipeline connection and the installation of the scale inhibiting component 3 can be conveniently carried out.

In some embodiments, in order to obtain sufficient heating of the water entering the heating vessel 1, the heating efficiency is increased. The electric heating part 2 is an electric heating pipe, and the part of the electric heating pipe in the heating container 1 forms a spiral pipe section.

Specifically, for the electric heating pipe, a spiral pipe section is formed at the inner part of the heating container 1, and the spiral pipe section can effectively prolong the length of the electric heating pipe in the heating container 1 so as to increase the contact area between the electric heating pipe and water in the heating container 1, thereby meeting the heating requirement of small volume and high function.

Meanwhile, the spiral pipe sections formed by the electric heating pipes can also play a role of guiding water flow in the heating container 1, and guide spaces for guiding the water flow to flow spirally are formed at intervals among the spiral pipe sections, so that the flow path of the water flow in the heating container 1 is prolonged, and the heat exchange efficiency is improved.

In a preferred embodiment, the first connection port 11 is an inlet and is close to an end cap 17 for mounting the electric heating tube, the second connection port 12 is an outlet and is close to another end cap 17, and the water outlet direction of the first connection port 11 faces to the spiral starting position M of the spiral pipe section.

Specifically, referring to the direction of the water flow entering the heating container 1 from the first connection port 11 represented by the dotted arrow in fig. 4, for the water flow entering the heating container 1 from the first connection port 11 flowing toward the spiral starting point M of the spiral pipe segment, the water flow flows along the spiral pipe segment to the inner wall of the heating cylinder 16, and the water flow will form a rotational flowing water flow in the heating cylinder 16 along the guidance of the spiral pipe segment after being blocked by the inner wall of the heating cylinder 16.

In this way, for the water flow flowing into the heating container 1, under the guiding action of the spiral pipe section, the water flow flows towards the second connecting port 12 and simultaneously rotates around the axis of the heating cylinder 16, so that the flow path of the water flow in the heating container 1 can be effectively prolonged, and the water can be ensured to be heated efficiently.

Wherein, the first water pipe 14 gradually reduces in pipe diameter along the water flow direction. The water flow enters the heating container 1 through the first water pipe 14, the speed of the water flow is accelerated, and then the water flow entering the heating container 1 impacts the water in the heating container 1, and the water in the heating container 1 obtains a better rotating flow effect under the guiding effect of the spiral pipe section.

In another embodiment, for the electric heating element 2 using an electric heating tube, the connection terminal thereof extends to the outside of the end cover 17, and at the same time, a temperature controller 5 may be further disposed on the end cover 17, and the temperature controller 5 is electrically connected with the connection terminal of the electric heating element 2.

Specifically, the end cover 17 can be used for mounting the electric heating part 2 on one hand, and can also be used for mounting the temperature controller 5 on the other hand, so as to meet the requirement of compact structure design.

In order to improve the use safety, the end of the heating container 1 is further provided with a protective cover 4, and the protective cover 4 covers the connecting terminal and the temperature controller 5. The terminal exposed outside the heating container 11 can be protected by the protective cover 13 to avoid potential safety hazards caused by water leakage inside the housing 100 of the gas water heater.

In the second embodiment, in order to meet the requirement of compact design, the layout of each component in the housing 100 is optimally designed as follows.

The water inlet pipe 101 and the water outlet pipe 102 are respectively connected to a heat exchanger 300 to form a heating water flow path, the heat exchanger 300 is located above the burner 200, and the electric heating module 400 is laterally arranged below the burner 200.

Specifically, the water heater of the present embodiment has a gas water heater as a main body and is additionally provided with an electric heating module 400, wherein the electric heating module 400 is provided inside the outer case 100 to form an integrated structure. In order to meet the design requirements of miniaturization and compactness, the mounting position of the electric heating module 400 may be arranged at a spatial position below the burner 200.

The electric heating module 400 is arranged in the outer shell 100, and the electric heating module 400 is transversely arranged, so that the space below the burner 200 in the outer shell 100 can be fully utilized to place the electric heating module 400, the electric heating module 400 can be integrated in the outer shell 100, the components in the outer shell 100 can be mounted more compactly, and the design requirement of miniaturization and compactness of the gas water heater can be met.

For a water heater using gas as energy, besides the burner 200 and the heat exchanger 300, components such as the fan 103 and the water pump 104 are disposed in the housing 100, and the heat exchanger 300 is disposed above the burner 200 and the components such as the fan 103 and the water pump 104 are disposed below the burner 200 in a conventional layout. And a certain space allowance is provided for the area where the fan 103 and the water pump 104 are arranged at the bottom of the housing 100, the electric heating module 400 is arranged at the bottom of the burner 200 and is positioned below the fan 103 and at one side of the water pump 104. The electric heating module 400 is installed by making full use of the space at the bottom of the housing 100, and the electric heating module 400 is laterally arranged, so that the electric heating module 400 can have a sufficiently long electric heating flow rate to heat the water flowing therethrough.

In some embodiments, there may be at least two ways for the water flow connection location of the electric heating module 400. In the first mode, the electric heating module 400 is connected between the water inlet pipe 101 and the heat exchanger 300; in the second mode, the electric heating module 400 is connected between the heat exchanger 300 and the water outlet pipe 102.

In the present embodiment, the electric heating module 400 is connected between the water outlet pipe 102 and the heat exchanger 300. Cold water delivered by a water supply pipe in a user's home enters the water inlet pipe 101, passes through the heat exchanger 300 and then enters the electric heating module 400, and finally water flowing out of the electric heating module is output through the water outlet pipe 102.

In another embodiment, to facilitate the connection of the pipelines, for example, the water inlet pipe 101 is further provided with a first connecting pipe 1011, and the water inlet pipe 101 is connected with the heat exchanger 300 through the first connecting pipe 1011; the water outlet pipe 102 is provided with a second connecting pipe 1021, and the water outlet pipe 102 is connected with the heat exchanger 300 through the second connecting pipe 1021; a bypass pipe 1000 is provided between the first connection pipe 1011 and the second connection pipe 1021.

Specifically, during actual use, the water outputted from the heat exchanger 300 flows into the electric heating module 400 through the second connection pipe 1021 and is finally outputted from the water outlet pipe 102. When the water is switched on and off for a short time, the temperature of the water outputted from the heat exchanger 300 is high, and a part of cold water is introduced into the second connection pipe 1021 from the bypass pipe 1000, so that the cold water and the hot water are mixed, thereby reducing the occurrence of a situation that the temperature of the water is greatly increased.

In order to avoid that the bypass pipe 1000 supplies excessive cold water to the second connection pipe 1021 in the normal heating process, the pipe diameter of the bypass pipe 1000 is smaller than the pipe diameters of the first connection pipe 1011 and the second connection pipe 1021. Specifically, when the user turns off the water for a short time and restarts the water, and the water flowing in from the water inlet pipe 101 is conveyed to the heat exchanger 300 and the bypass pipe 1000 through the first connecting pipe 1011, the heat exchange pipeline in the heat exchanger 300 is coil-shaped, so that the water resistance at the initial stage of the water flow is large, and more cold water can enter the second connecting pipe 1021 through the bypass pipe 1000; and the water heated again in the heat exchanger 300 can be effectively cooled by the cold water after flowing into the second connection pipe 1021, so as to reduce the fluctuation of the water temperature. During normal heating, most of the water conveyed by the first connecting pipe 1011 enters the heat exchanger 300 to be heated due to the small pipe diameter of the bypass pipe 1000, so that the requirement of normal heating is met.

In addition, as for the pipe arrangement of the first connection pipe 1011, the second connection pipe 1021 and the bypass pipe 1000, the first connection pipe 1011 and the second connection pipe 1021 may be arranged at the same side of the heat exchanger 300, and the bypass pipe 1000 may also be arranged at the side of the heat exchanger 300. Alternatively, the first connection pipe 1011 is disposed at one side of the heat exchanger 300, the second connection pipe 1021 is disposed at the other side of the heat exchanger 300, and the bypass pipe 1000 is located below the combustor 200.

In some embodiments, the electric control components of the water heater are placed in the electric control box 500, and the electric components may be components such as an electric control board disposed in the electric control box 500, wherein the electric control board is used to control the operation of the burner 200 and the electric heating module 400, and the specific configuration inside the electric control box 500 is not limited or described herein.

And the electronic control box 500 is also disposed inside the casing 100 for the requirement of a compact design, and the electronic control box 500 is disposed at the side of the burner 200.

Specifically, there is a free space between the burner 200 and the side wall of the casing 100 for installing the electronic control box 500. In order to avoid the influence of the heat generated by the gas combustion of the burner 200 on the electrical components in the electronic control box 500, a shielding plate 501 is further arranged between the electronic control box 500 and the burner 200. The protection plate 501 is shielded between the electronic control box 500 and the burner 200, and can play a role in insulating heat for the electronic control box 500.

In the third embodiment, based on the first and second embodiments, the number of times of starting the burner is reduced and the noise is reduced when the amount of hot water used is small by sufficiently utilizing the electric heating module. When the gas water heater is in use, the operation of the gas water heater can be controlled by adopting the following control method.

As shown in fig. 8, the control method includes:

and step S101, calculating the heat quantity Qt required by the current heated inlet water flow.

Specifically, after the gas water heater is started, when water flow enters the water flow to be heated, the corresponding heating source is judged and selected by calculating the heat required by the water flow heating.

And S102, judging whether Qt is larger than the heat Q0 generated by the electric heating module in the gas water heater.

And S103, if so, starting a burner in the gas water heater to heat the water inflow.

Specifically, when the heating water flows to the set temperature and requires a large amount of heat, the burner 100 is started, and the burner 100 generates a large amount of heat to meet the requirement of the water flow on the heat.

And step S104, if not, starting the electric heating module to heat the inflow water flow.

Specifically, when the heating water flows to the set temperature and requires less heat, the electric heating module 300 is started, and the heat generated by the electric heating module 300 meets the requirement of the water flow on the heat. In this case, the burner 100 and the blower fan in the gas water heater are turned off while the electric heating module 300 is activated. At this time, the burner 100 and the fan do not need to be started, so that the noise generated by the burner and the fan is reduced, and the purpose of reducing the noise is achieved.

Wherein, for the calculation of the heat quantity required by the water inflow, according to the formula: qt = c ρ Vt × (T0-Tt), where the influent flow rate is Vt, the influent temperature Tt, and the set temperature T0, Qt is calculated.

Specifically, the water inlet pipe 601 is provided with a temperature sensor and a flow sensor as needed, and further can detect the inflow water quantity Vt and the inflow water temperature Tt. The set temperature T0 is set by the user in advance, and the heat quantity Qt required by the inlet water flow can be calculated according to the above formula.

Furthermore, when the combustor burns normally, the combustor is provided with a plurality of fire rows, the combustor is divided into a multi-section heating mode according to load requirements in the working process, and different fire rows are controlled to burn gas in the heating modes of different levels. The noise generated by the burner heating module is gradually increased along with the increase of the power of the burner heating module, and the following control method is further included for better controlling the noise.

As shown in fig. 9, the control method includes:

s201, after the gas water heater is started, along with the increase of load, whether the maximum heating power of the burner exceeds the maximum heating power of the burner in the N-section heating mode is judged.

Specifically, the gas water heater mainly depends on the burner 100 to burn gas to heat water during normal operation, and the burner 100 generates certain noise during the burning process, and the noise generated by the burner 100 is larger as the heating power is increased.

S202, if the burner does not reach the maximum heating power in the N-section heating mode, the heating power of the burner in the gas water heater is increased.

Specifically, in the N-stage heating mode, for the increase of the load, the heating amount is first satisfied by increasing the heating power of the burner in the N-stage heating mode.

S203, if the burner is increased to the maximum heating power of the N-section heating mode in the N-section heating mode, starting an electric heating module in the gas water heater for auxiliary heating.

Specifically, when the load continues to increase when the burner is at the maximum heating power in the N-stage heating mode, the requirement cannot be satisfied by only depending on the heating amount of the burner in the N-stage heating mode. And if the N +1 section heating mode is executed, the operation noise is increased, and at the moment, the electric heating module in the gas water heater is started for auxiliary heating. The electric heating module can meet the heating requirement exceeding a certain amount due to load increase in the N-section heating mode, so that the gas water heater is at a reduced noise level.

In another embodiment of the present application, if the load continues to increase during the operation of the gas water heater, the gas water heater control method of this embodiment further includes:

s204, in the N-section heating mode, when the electric heating module is at the maximum heating power and the load of the gas water heater is continuously increased, the gas water heater executes the N + 1-section heating mode.

Specifically, when the heating power of the burner and the heating power of the electric heating module cannot meet the load requirement in the N-section heating mode, the gas water heater executes the N + 1-section heating mode. After the gas water heater is switched to the N +1 section heating mode, the heating power of the burner is gradually increased, and the heating power of the electric heating module is gradually reduced until the electric heating module is closed. Wherein the maximum heating power of the burner in the N-section heating mode is not greater than the minimum heating power of the burner in the N + 1-section heating mode.

Through in the gas heater operation process, after the load increase, when the combustor is in maximum heating power under the heating mode of locating, carry out the auxiliary heating through starting electric heating module earlier to satisfy the requirement of load increase, and then can gas heater's combustion noise, two kinds of heating power cooperation executions of burning gas and electric auxiliary heating, superpose the electric heating load value at the high load section of gas burning load value, can reduce the noise value of gas burning by a wide margin, and then improve user experience nature.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. An electric heating module for a gas water heater, comprising:

the heating device comprises a heating container, a first connecting port, a second connecting port and a mounting port are arranged on the heating container, a first water pipe is arranged on the first connecting port, and a second water pipe is arranged on the second connecting port;

an electric heating part for heating water in the heating container by electrifying;

a scale inhibiting assembly configured with a scale inhibiting material, the scale inhibiting assembly disposed in the mounting opening.

2. The electric heating module of claim 1, wherein said scale inhibiting assembly comprises a mounting tube, a first end of said mounting tube being provided with water permeable holes, said scale inhibiting material being filled in said mounting tube, said mounting tube being disposed in said mounting port, said water permeable holes being located inside said heating vessel.

3. The electric heating module of claim 2, wherein said second end of said mounting tube is provided with a nozzle, said scale inhibiting assembly further comprising a sealing cap removably disposed at said second end of said mounting tube for opening and closing said nozzle; the sealing cap is located outside the heating vessel.

4. The electric heating module of claim 1, wherein said first connection port, said second connection port and said mounting port are disposed on a side wall of said heating vessel; one end of the heating container is provided with a detachable end cover, and the electric heating part is arranged on the end cover.

5. An electric heating module as claimed in claim 4, characterised in that said electric heating element is an electric heating tube, the portion of which located inside said heating container forms a spiral section.

6. An electric heating module as set forth in claim 4 wherein said terminals of said electric heating element project outwardly of said end cap.

7. The electric heating module of claim 6, wherein said end cap is further provided with a thermostat, said thermostat being electrically connected to said electric heating element terminals.

8. The electric heating module of claim 7, wherein said heating container is further provided with a protective cover at its end, said protective cover covering said terminals and said thermostat.

9. Electrical heating module as in claim 1, characterized in that said electrical heating element is a thick film, said thick film being wrapped outside said heating container.

10. A gas water heater, comprising:

the water inlet pipe and the water outlet pipe extend to the outside;

a burner for burning a combustible gas;

a heat exchanger for supplying water to flow and heating water using heat generated from the burner;

an electric heating module using the electric heating module according to any one of claims 1 to 9;

the water inlet pipe and the water outlet pipe are respectively connected with the heat exchanger to form a heating water flow path, and a heating container connected with the electric heating module is connected in the heating water flow path.

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