CN215571183U

CN215571183U - Gas water heater

Info

Publication number: CN215571183U
Application number: CN202120774140.XU
Authority: CN
Inventors: 杨玉敏; 张伟; 李键
Original assignee: Qingdao Economic And Technology Development District Haier Water Heater Co ltd; Chongqing Haier Water Heater Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Economic And Technology Development District Haier Water Heater Co ltd; Chongqing Haier Water Heater Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2022-01-18
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses a gas water heater, comprising: a control module; 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 heater is arranged in the heating water flow path and used for electrically heating water flowing through, and the power supply input end of the electric heater is connected with the main power supply line; the leakage detection module is arranged between the power supply input end of the electric heater and the main power line, is used for detecting leakage current in a power supply loop of the electric heater and sending the leakage current to the control module; and the switch module is connected between the power input end of the electric heater and the main power line, and the on-off state of the switch module is controlled by the control module. According to the gas water heater, the electric leakage detection module is arranged, so that whether the electric heater has an electric leakage condition or not is strictly monitored, and the personal safety of a user is ensured.

Description

Gas water heater

Technical Field

The utility model belongs to the technical field of household appliances, and particularly relates to a 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. Chinese patent application No. 2008101557093 discloses a hybrid energy thermostatic control water heater, which is additionally provided with an electric heating device on a gas water heater to assist in heating a gas burner through the electric heating device. The scheme that combines together electric heater spare and gas heater has brought new technical problem for gas heater simultaneously, has also brought the electric leakage risk, and the water heater in case the electric leakage takes place, will cause extremely serious harm to the human body, consequently, how to realize becoming the problem that awaits measuring to the earth leakage protection of gas heater.

In view of this, how to design a safe gas water heater with an electric heating device is a main technical problem to be solved by the utility model.

Disclosure of Invention

The utility model provides a gas water heater aiming at the technical problem that the existing gas water heater with an electric heater has electric leakage risk, and can solve the problem.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

a gas water heater comprising:

a control module;

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 heater is arranged in the heating water flow path and used for electrically heating water flowing through, and a power supply input end of the electric heater is connected with the main power supply line;

the leakage detection module is arranged between the power supply input end of the electric heater and a main power line, is used for detecting leakage current in a power supply loop of the electric heater and sends the leakage current to the control module;

and the switch module is arranged between the power supply input end of the electric heater and a main power supply line, and the on-off state of the switch module is controlled by the control module.

Furthermore, the main power line comprises a live line and a zero line, and the power input end of the electric heater is respectively connected with the live line and the zero line through a first connecting line and a second connecting line;

the leakage detection module includes:

the first connecting wire and the second connecting wire or the live wire and the zero wire respectively penetrate through the leakage current transformer;

and the input end of the amplifying circuit is connected with the output end of the leakage current transformer, and the output end of the amplifying circuit is connected with the control module.

Further, the electric heater comprises a heating container and an electric heating part, the electric heating part is arranged in the heating container, an electric heating flow channel is defined inside the heating container, the electric heating flow channel is connected in series in an upstream water path or a downstream water path of the heat exchanger, and power supply terminals of the electric heating part are respectively connected with the first connecting line and the second connecting line.

Furthermore, the gas water heater comprises a shell, wherein a water inlet pipe joint used for connecting a water inlet pipe and a water outlet pipe joint used for connecting a water outlet pipe are arranged on the shell, and the electric heating flow channel is connected in series in a downstream water path of the heat exchanger and is close to the water outlet pipe joint.

Furthermore, be provided with first connector and second connector on heating container's the lateral wall, first connector with the second connector interval sets up, the power supply terminal of electric heating part stretches out to the outside of one end portion of heating container, heating container's tip still is provided with the safety cover, the safety cover covers the power supply terminal.

Further, the switch module includes:

the first switch is connected to the first connecting wire and used for controlling the on-off state of the first connecting wire, and the control end of the first switch is connected with the control module;

and the second switch is connected to the second connecting wire and used for controlling the on-off state of the second connecting wire, and the control end of the second switch is connected with the control module.

Further, the first switch and/or the second switch is a relay.

Further, the gas water heater further comprises:

and the control module is arranged in the electric control box.

Further, the electric control box is arranged at a position close to the water inlet pipe.

Furthermore, one side of the electric control box, which faces the combustor, is provided with a protection device.

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

the gas water heater, especially for the gas water heater with the electric heater, strictly monitors whether the electric heater has an electric leakage condition or not by arranging the electric leakage detection module, and disconnects the electric connection between the electric heater and the power bus by the control switch module when the electric leakage condition is detected, so that the personal safety of a user is guaranteed.

Other features and advantages of the present invention will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.

Drawings

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

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

FIG. 2 is a schematic view of the internal structure of FIG. 1;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

FIG. 4 is an enlarged view of portion A of FIG. 2;

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

fig. 6 is an exploded view of fig. 5.

Wherein, 11, a burner; 12. a heat exchanger; 13. an electric heater; 131. heating the container; 1311. a first connection port; 1312. a second connection port; 132. an electric heating part; 14. a leakage detection module; 15. a main power supply line; 16. a switch module; 17. a control module; 18. a first connecting line; 19. a second connecting line; 20. a fan; 21. a water pump; 22. an electronic control box; 23. 24, a first connecting pipe; 25. a second connecting pipe; 26. a bypass pipe.

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.

Example one

The gas water heater of the present embodiment, as shown in fig. 1 to fig. 3, includes a burner 11, a heat exchanger 12, an electric heater 13, an electric leakage detection module 14, and a control module 17, wherein:

the water purifier comprises a shell 10, wherein an installation space is formed inside the shell 10, and a water inlet pipe and a water outlet pipe which extend to the outside are also arranged on the shell 10;

a burner 11 for burning a combustible gas;

a heat exchanger 12 for supplying water to flow and heating water using heat generated from the burner 11;

an electric heating flow passage is formed in the electric heater 13;

the leakage detection module 14 is connected with the control module 17, and the leakage detection module 14 is arranged between the power input end of the electric heater 13 and the main power line 15, is used for detecting leakage current in a power supply loop of the electric heater 13, and sends the leakage current to the control module 17;

and the switch module 16 is connected with the control module 17, the switch module 16 is connected between the power input end of the electric heater 13 and the main power line 15, and the on-off state of the switch module 16 is controlled by the control module 17.

The leakage detection module 14 sends a detection signal to the control module 17, and when there is no leakage signal, the control module controls the switch module 16 to be turned on, and when there is a leakage signal, the control module controls the switch module 16 to be turned off.

The main power line 15 includes a live line L and a neutral line N, and a power input end of the electric heater 13 is connected to the live line L through a first connecting line 18 and to the neutral line N through a second connecting line 19. The other of the live line L and the neutral line N is connected to a control board (not shown) on which the control module 17 is located, for supplying power to the control module.

The leakage detecting module 14 includes a leakage current transformer 141 and an amplifying circuit 142, and the first connection line 18 and the second connection line 19 pass through the leakage current transformer 141, respectively. The input end of the amplifying circuit 142 is connected with the output end of the leakage current transformer 141, and the output end of the amplifying circuit 142 is connected with the control module 17.

The leakage detection principle of the leakage detection module 14 is as follows: the first connection line 18 and the second connection line 19 in the same loop pass through the leakage current transformer 141, and since the currents on each conductor are equal in magnitude and opposite in direction, the total current vector sum is equal to 0. When the wire in the leakage current transformer 141 leaks electricity, because the loop has a branch, the sum of the current vectors passing through the leakage current transformer 141 is no longer equal to 0, the induced potential is generated at the secondary side of the leakage current transformer 141, and the signal is amplified by the amplifying circuit 142 and then sent to the control module 17, so that the control module 17 controls the switch module 16 to be switched off, and the protection effect is achieved.

Because when the electric heater 13 leaks electricity, the leakage current can be directly conducted to the human body in water, and the human body is directly injured, in the embodiment, the leakage current detection module 14 is arranged between the main power line 15 and the electric heater 13 and is specially used for detecting the leakage state of the electric heater 13, and once the electric heater 13 is leaked electricity, the conduction between the electric heater 13 and the power line is cut off, so that the personal safety is practically ensured.

Furthermore, a leakage detecting module 14 may also be provided at the location of the mains power supply line 15 for detecting a leakage state of the mains power supply line 15. Specifically, the other line L and the neutral line N respectively pass through the leakage current transformers 141. In this arrangement, when detecting that there is an electric leakage, the switch module 16 is controlled to be turned off, and the electric leakage may be caused by the electric heater 13 or the control board, and the detection is less specific than the former solution.

As shown in fig. 5 and 6, the electric heater 13 includes a heating container 131 and an electric heating element 132, the electric heating element 132 is disposed in the heating container 131, an interior of the heating container 131 defines an electric heating flow passage, the electric heating flow passage can be connected in series in an upstream water path or a downstream water path of the heat exchanger 12, and power terminals of the electric heating element 132 are connected with the first connecting line 18 and the second connecting line 19, respectively.

When the electric heating flow passage may be connected in series in the upstream water path of the heat exchanger 12, the electric heater 13 heats the water first and then enters the heat exchanger 12 to heat.

When the electric heating flow passage can be connected in series in the downstream water path of the heat exchanger 12, the electric heater 13 firstly heats the hot water coming out of the heat exchanger 12 and then outputs the hot water to be supplied to a user.

As shown in fig. 1, the casing 10 is provided with an inlet pipe connector 101 for connecting an inlet pipe and an outlet pipe connector 102 for connecting an outlet pipe, and in this embodiment, the electric heating flow passage of the electric heater 13 is preferably connected in series in the downstream water path of the heat exchanger 12 and close to the outlet pipe connector 102.

When the gas heater initially opened system hot water, owing to must detect rivers just ignition, will have partial cold water to flow out, through setting up electric heater 13 in the low reaches water route of heat exchanger 12, and be close to outlet pipe joint 102, can heat the cold water that flows out, prevent that the direct supply user from influencing the experience of using water.

The heat exchanger 12 is located above the burner 11 in this embodiment, and the electric heater 13 is arranged laterally below the burner 11.

Specifically, the water heater of the present embodiment has a gas water heater as a main body and is additionally provided with an electric heater 13, wherein the electric heater 13 is disposed inside the housing 10 to form an integrated structure.

In order to meet the design requirements of miniaturization and compactness, the mounting position of the electric heater 13 may be arranged at a spatial position below the burner 11.

For a water heater using gas as energy source, besides the burner 11 and the heat exchanger 12, a fan 20, a water pump 21 and other components are disposed in the housing 10, and the heat exchanger 12 is disposed above the burner 11 and the fan 20, the water pump 21 and other components are disposed below the burner 11 in a conventional layout manner.

And a certain space margin is provided for the area where the fan 20 and the water pump 21 are disposed at the bottom of the housing 10, the electric heater 13 is disposed at the bottom of the burner 11 and below the fan 20 and at a side of the water pump 21. The electric heater 13 is installed by sufficiently using the space at the bottom of the housing 10, and the electric heater 13 is laterally arranged, so that the electric heater 13 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 heater 13.

In another embodiment, to facilitate the connection of the pipeline, further, as shown in fig. 4, the water inlet pipe is provided with a first connecting pipe 24, and the water inlet pipe is connected with the heat exchanger 12 through the first connecting pipe 24; the water outlet pipe is provided with a second connecting pipe 25 and is connected with the heat exchanger 12 through the second connecting pipe 25; a bypass pipe 26 is provided between the first connection pipe 24 and the second connection pipe 25.

Specifically, during actual use, the water output from the heat exchanger 12 flows into the electric heater 13 via the second connection pipe 25 and is finally output from the water outlet pipe. When the water is switched on and off for a short time, the temperature of the water output from the heat exchanger 12 is high, and a part of cold water from the bypass pipe 26 enters the second connection pipe 25, so that the cold water and the hot water are mixed, thereby reducing the occurrence of the situation that the water temperature response is greatly increased.

In order to prevent the bypass pipe 26 from supplying excessive cold water to the second connection pipe 25 during the normal heating process, the pipe diameter of the bypass pipe 26 is smaller than those of the first connection pipe 24 and the second connection pipe 25.

Specifically, when the user turns off the water for a short time and starts the water again, and the water flow flowing in from the water inlet pipe is conveyed to the heat exchanger 12 and the bypass pipe 26 through the first connecting pipe 24, because the heat exchange pipeline in the heat exchanger 12 is in a coil shape, the water resistance at the initial stage of the water flow is large, and further more cold water can enter the second connecting pipe 25 through the bypass pipe 26; and the water heated secondarily in the heat exchanger 12 can be effectively cooled by the cold water after flowing into the second connecting pipe 25, so as to reduce the fluctuation of the water temperature.

During normal heating, as shown in fig. 4, due to the small diameter of the bypass pipe 26, most of the water delivered by the first connecting pipe 24 enters the heat exchanger 12 to be heated, so as to meet the requirement of normal heating.

In addition, with respect to the piping arrangement of the first connecting pipe 24, the second connecting pipe 25, and the bypass pipe 26, it is possible to arrange the first connecting pipe 24 and the second connecting pipe 25 on the same side of the heat exchanger 12, and the bypass pipe 26 is also arranged on the side of the heat exchanger 12.

Alternatively, the first connection pipe 24 is disposed at one side of the heat exchanger 12, the second connection pipe 25 is disposed at the other side of the heat exchanger 12, and the bypass pipe 26 is located below the combustor 11.

In some embodiments, the electric control component of the water heater is placed in the electric control box 22, and the electric component may be a component such as an electric control board disposed in the electric control box 22, where the electric control board is used to control the operation of the burner 11 and the electric heater 13, and the specific configuration inside the electric control box 22 is not limited or described herein.

And for the requirement of a compact design, the electronic control box 22 is also arranged inside the housing 10, and the electronic control box 22 is arranged at the side of the burner 11. Specifically, the burner 11 and the side wall of the housing 10 have a free space therebetween for installing the electronic control box 22. In order to avoid the influence of the heat generated by the gas burning of the burner 11 on the electrical components in the electronic control box 22, a protection device 23 is disposed on the side of the electronic control box 22 facing the burner 11. The protective device 23 is shielded between the electronic control box 22 and the burner 11, and can play a role of heat insulation for the electronic control box 22.

As a preferred embodiment, the switch module 16 in this embodiment includes a first switch and a second switch. Wherein:

the first switch is connected to the first connection line 18 and used for controlling the on-off state of the first connection line 18, and the control end of the first switch is connected with the control module 17.

Since the first connection line 18 is connected to the live line L of the main power line, the first switch is actually used to control the connection state of the electric heater 13 to the live line L.

The second switch is connected to the second connection line 19 and used for controlling the on-off state of the second connection line 19, and the control end of the second switch is connected with the control module 17.

Since the second connection line 19 is connected to the neutral line N of the main power supply line, the second switch is actually used to control the connection state of the electric heater 13 to the neutral line N.

In this embodiment, through setting up two switches of first switch and second switch, control respectively with the connected state of live wire and zero line, the trouble appears when having solved single on-off control, leads to the problem that can't in time break off electric heater 13 and power, and the reliability is higher.

The first switch and/or the second switch in this embodiment may be implemented by using a relay, but is not limited to a relay, and may also be implemented by using other electronic control switches capable of playing similar roles.

The electrical control box 22 is preferably arranged in this embodiment at a position close to the water inlet pipe. Because the inlet water of the inlet pipe is cold water, the temperature around the inlet pipe is lower, the function of protecting the electrical elements in the electric control box 22 can be achieved, and the service life of the electric control box is prolonged.

In one embodiment, for the concrete entity of the electric heater 13, as shown in fig. 4-5, the electric heater 13 includes a heating container 131 and an electric heating component 132, the electric heating component 132 is disposed in the heating container 131, and the heating container 131 is connected in series in the heating water flow path.

Specifically, the electric heating part 132 is provided in the heating container 131, and the water flowing into the heating container 131 is heated by the electric heating part 132 as needed and then is output from the water outlet pipe.

Wherein, in order to improve the heating efficiency, the electric heating component 132 adopts a coiled pipe structure, and the water flow enters the heating container 131 and has a larger contact heat exchange area with the electric heating component 132, so as to improve the heating efficiency.

In order to connect the heating container 131 to the heating water flow path, a first connection port 1311 and a second connection port 1312 are provided on a side wall of the heating container 131, and the first connection port 1311 and the second connection port 1312 are spaced apart from each other.

Specifically, the first connection port 1311 is connected to the second connection pipe 25 so that water output from the heat exchanger 12 enters the heating container 131, and the second connection port 1312 is connected to an outlet pipe so that hot water is finally output therefrom.

In addition, the terminals of the electric heating element 132 protrude to the outside of one end portion of the heating container 131, and a protective cover 133 is further provided at the end portion of the heating container 131, and the terminals are covered with the protective cover 133. Specifically, the terminal exposed to the outside of the heating container 131 can be protected by the protective cover 133, so as to avoid potential safety hazards caused by water leakage inside the outer shell 10 of the water heater.

In another embodiment, the electric heater 13 further comprises a water treatment part (not shown in the figure) for performing bacteriostatic and scale-inhibiting treatment on the water flowing through, the water treatment part being disposed between the inner cannula 23 and the outer cannula 22;

when a user opens the water terminal to use hot water, the water entering the water supply pipe is treated by the water treatment part so as to carry out bacteriostasis and scale inhibition treatment on the water, thereby achieving the effect of softening the water. The softened water continuously flows and is heated by the heat generated by the electric heater, and the heated water is output through the water outlet pipe.

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

1. A gas water heater, comprising:

a control module;

a burner for burning a combustible gas;

and the switch module is connected between the power input end of the electric heater and a main power line, and the on-off state of the switch module is controlled by the control module.

2. The gas water heater of claim 1,

the main power line comprises a live wire and a zero line, and the power input end of the electric heater is respectively connected with the live wire and the zero line through a first connecting wire and a second connecting wire;

the leakage detection module includes:

3. The gas water heater of claim 2, wherein the electric heater includes a heating vessel and an electric heating element disposed in the heating vessel, the heating vessel defining an electric heating flow passage therein, the electric heating flow passage being connected in series in an upstream water path or a downstream water path of the heat exchanger, power supply terminals of the electric heating element being connected to the first connection line and the second connection line, respectively.

4. The gas water heater of claim 3, including a housing having an inlet fitting for connection to an inlet pipe and an outlet fitting for connection to an outlet pipe, said electrical heating flow path being connected in series in a downstream waterway of said heat exchanger and adjacent to said outlet pipe fitting.

5. The gas water heater according to claim 3, wherein the side wall of the heating container is provided with a first connection port and a second connection port, the first connection port and the second connection port are arranged at intervals, the power terminal of the electric heating element extends to the outside of one end of the heating container, and the end of the heating container is further provided with a protective cover which covers the power terminal.

6. The gas water heater of claim 1,

the switch module includes:

7. The gas water heater of claim 6,

the first switch and/or the second switch is a relay.

8. The gas water heater of any one of claims 1-7, further comprising:

and the control module is arranged in the electric control box.

9. The gas water heater of claim 8, wherein the electronic control box is disposed proximate the water inlet pipe.

10. The gas water heater of claim 8, wherein a guard is provided on a side of the electrical control box facing the burner.