CN106091356B

CN106091356B - Gas water heater

Info

Publication number: CN106091356B
Application number: CN201610606161.4A
Authority: CN
Inventors: 黄官贤; 杜小文; 陆祖安; 梁国荣
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2016-07-28
Filing date: 2016-07-28
Publication date: 2022-12-16
Anticipated expiration: 2036-07-28
Also published as: CN106091356A

Abstract

The invention discloses a gas water heater, which comprises: the heat exchanger is provided with a water inlet and a water outlet; the combustor is used for heating the heat exchanger and is provided with a gas inlet; the circulating pipeline is respectively communicated with the water inlet and the water outlet; and the circulating water pump is connected to the circulating pipeline. The gas water heater provided by the embodiment of the invention has the advantages of difficulty in scaling, good heat exchange effect, long service life and the like.

Description

Gas water heater

Technical Field

The invention relates to the technical field of electric appliance manufacturing, in particular to a gas water heater.

Background

The gas heater among the correlation technique can produce the incrustation scale at the water route part of heat exchanger along with operating time extension, seriously reduces heat exchange efficiency, and the incrustation scale is piled up too much and easily leads to dry combustion method hidden danger. Therefore, the descaling is performed on part of water heaters by injecting a descaling agent into the heat exchanger, but the descaling operation is required to be frequently performed, which is very troublesome.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the invention provides the gas water heater which has the advantages of being not easy to scale, good in heat exchange effect, long in service life and the like.

To achieve the above object, a gas water heater according to an embodiment of the present invention is provided, including: the heat exchanger is provided with a water inlet and a water outlet; the combustor is used for heating the heat exchanger and is provided with a gas inlet; the circulating pipeline is respectively communicated with the water inlet and the water outlet; and the circulating water pump is connected to the circulating pipeline.

The gas water heater provided by the embodiment of the invention has the advantages of difficulty in scaling, good heat exchange effect, long service life and the like.

In addition, the gas water heater according to the above embodiment of the present invention may further have the following additional technical features:

according to an embodiment of the invention, the gas water heater further comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is respectively communicated with the water inlet and the water source, the water outlet pipe is respectively communicated with the water outlet and the water using end of the user, the circulating pipeline is respectively connected with the water inlet pipe and the water outlet pipe, a connection node of the circulating pipeline and the water inlet pipe is positioned between the water inlet and the water source, and a connection node of the circulating pipeline and the water outlet pipe is positioned between the water outlet and the water using end of the user.

According to an embodiment of the invention, the gas water heater further comprises a water storage tank connected to the water inlet pipe and located between the water inlet and a connection node of the circulation pipeline and the water inlet pipe.

According to an embodiment of the invention, the gas water heater further comprises a water storage tank connected to the water outlet pipe.

According to an embodiment of the invention, the water storage tank is located between the connection node of the circulation pipeline and the water outlet pipe and the water outlet.

According to one embodiment of the invention, the gas water heater further comprises a controller and a gas proportional valve, the gas proportional valve is connected to the gas inlet, the controller is respectively communicated with the gas proportional valve and the circulating water pump, and the controller controls the circulating water pump to operate for a preset time after the gas proportional valve is closed.

According to one embodiment of the invention, a circulation on-off valve is connected to the circulation pipeline, the circulation on-off valve is communicated with the controller, and the controller controls the circulation on-off valve to be opened for the preset time after the gas proportional valve is closed.

According to one embodiment of the invention, the gas water heater further comprises a water flow sensor connected to the water inlet pipe or the water outlet pipe and in communication with the controller, and the controller controls the gas proportional valve to close after the water flow sensor detects that the water flow stops.

According to one embodiment of the invention, the water flow sensor is connected between the water inlet and a connection node of the circulation line and the water inlet pipe.

According to one embodiment of the invention, a water return pipe joint for connecting a water return pipe is arranged on the circulating pipeline.

Drawings

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

Fig. 2 is a schematic structural view of a gas water heater according to another embodiment of the present invention.

Reference numerals: the gas water heater comprises a gas water heater 1, a heat exchanger 200, a water inlet 210, a water outlet 220, a combustor 300, a circulating pipeline 700, a circulating water pump 710, a circulating on-off valve 720, a water inlet pipe 810, a water outlet pipe 820, a water storage tank 900, a controller 1000, a gas proportional valve 1100 and a water flow sensor 1200.

Detailed Description

The present invention is made based on the finding by the inventors of the present application of the following facts and problems:

in the gas water heater in the related technology, stored water can be reserved in the heat exchanger after the gas water heater works, the stored water is still after the gas water heater stops working and is heated by the waste heat of the heat exchanger, the temperature is close to a boiling state, and scale is very easily generated.

Therefore, the invention provides the gas water heater 1, and the gas water heater 1 has the advantages of being not easy to scale, good in heat exchange effect, long in service life and the like.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

A gas water heater 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, a gas water heater 1 according to an embodiment of the present invention includes a heat exchanger 200, a burner 300, a circulation line 700, and a circulation water pump 710.

The heat exchanger 200 is provided with a water inlet 210 and a water outlet 220. The burner 300 is used for heating the heat exchanger 200, and the burner 300 is provided with a gas inlet. The circulation line 700 is in communication with the water inlet 210 and the water outlet 220, respectively. The circulation water pump 710 is connected to the circulation line 700.

According to the gas water heater 1 of the embodiment of the invention, the circulating pipeline 700 and the circulating water pump 710 are arranged, so that the water inlet 210 and the water outlet 220 of the heat exchanger 200 can be communicated by using the circulating pipeline 700, and the water in the heat exchanger 200 can be circularly exchanged with the water in the circulating pipeline 700. Therefore, after the user stops using hot water, the water in the circulating pipeline 700 is driven to flow by starting the circulating water pump 710, the water in the circulating pipeline 700 and the water in the heat exchanger 200 are promoted to circulate, the water temperature in the heat exchanger 200 is reduced, the phenomenon that the heat exchanger 200 generates scale due to the fact that overheated water is left in the heat exchanger 200 is avoided, and the heat exchanger 200 is not prone to scaling.

Moreover, as the heat exchanger 200 is not easy to scale, the heat exchanger 200 is not easy to influence the heat exchange effect due to scaling, thereby ensuring the heat exchange effect of the heat exchanger 200, prolonging the service life of the heat exchanger 200, saving the cost of a scale removal device, reducing the frequency of scale removal of the heat exchanger 200 and facilitating the use of the gas water heater 1 by a user.

In addition, because heat exchanger 200 can reduce the temperature of depositing water in heat exchanger 200 through circulating to depositing water, can avoid because the deposit cooling that heat exchanger 200's volume increased messenger is slow and lead to the problem of scale deposit in the heat exchanger 200 to can be convenient for enlarge heat exchanger 200's volume, improve heat exchange efficiency of heat exchanger 200.

Therefore, the gas water heater 1 provided by the embodiment of the invention has the advantages of difficulty in scaling, good heat exchange effect, long service life and the like.

In some embodiments of the present invention, as shown in fig. 1 and 2, a gas water heater 1 according to an embodiment of the present invention includes a heat exchanger 200, a burner 300, a circulation line 700, and a circulation water pump 710.

The gas water heater 1 further comprises a water inlet pipe 810 and a water outlet pipe 820, the water inlet pipe 810 is respectively communicated with the water inlet 210 and a water source, the water outlet pipe 820 is respectively communicated with the water outlet 220 and a user water end, the circulation pipeline 700 is respectively connected with the water inlet pipe 810 and the water outlet pipe 820, a connection node of the circulation pipeline 700 and the water inlet pipe 810 is located between the water inlet 210 and the water source, and a connection node of the circulation pipeline 700 and the water outlet pipe 820 is located between the water outlet 220 and the user water end. Thus, the connection of the circulation pipeline 700 can be realized, and water can pass through part of the water inlet pipe 810 and part of the water outlet pipe 820 when circulating, so that the cooling effect of the heat exchanger 200 is improved. In addition, through connecting circulating water pump 710 on circulating line 700, can make rivers make and can not pass through circulating water pump 710 at user normal use hot water to the resistance of intaking when reducing user normal use, thereby the play water flow when avoiding circulating water pump 710 to influence user's water, travelling comfort when improving the user and using.

In an embodiment of the present invention, as shown in fig. 2, the gas water heater 1 further includes a water storage tank 900, and the water storage tank 900 is connected to the water inlet pipe 810 and is located between the connection node of the circulation pipe 700 and the water inlet pipe 810 and the water inlet 210. In the circulation that water that can make the water in the water storage tank 900 participate in the water in the circulating line 700 and the water in the heat exchanger 200 go on like this, make the water in the water storage tank 900 and the water in the heat exchanger 200 carry out the circulation exchange, thereby further be convenient for reduce the temperature of heat exchanger 200, and when connecting water storage tank 900 on inlet tube 810 and can making the circulation, the water of reserving in the water storage tank 900 is the cold water that enters through cold water inlet 130, thereby can reduce the water storage temperature in the water storage tank 900, when carrying out the circulation exchange with the water in the heat exchanger 200, can improve the cooling effect to heat exchanger 200.

In another embodiment of the present invention, as shown in fig. 1, the gas water heater 1 further comprises a water storage tank 900, and the water storage tank 900 is connected to the water outlet pipe 820. Therefore, the hot water flowing out through the water outlet pipe 820 can be buffered through the water storage tank 900, and the phenomenon that the water flowing out from the water end of the user is suddenly cooled and suddenly heated is avoided.

Advantageously, as shown in fig. 1, the water storage tank 900 is located between the connection node of the circulation line 700 and the outlet pipe 820 and the water outlet 220. This enables the water in the water storage tank 900 to participate in the circulation between the water in the circulation pipeline 700 and the water in the heat exchanger 200, and enables the water in the water storage tank 900 to circularly exchange with the water in the heat exchanger 200, thereby further facilitating the reduction of the temperature of the heat exchanger 200.

It will be understood by those skilled in the art that the water storage tank 900 may be provided on both the water inlet tube 810 and the water outlet tube 820.

Specifically, the water storage tank 900 has a volume of 1-2L. This can improve the cooling effect of the heat exchanger 200 while ensuring the heating rate of water,

fig. 1 and 2 show a gas water heater 1 according to one specific example of the invention. As shown in fig. 1 and 2, the gas water heater 1 further includes a controller 1000 and a gas proportional valve 1100, the gas proportional valve 1100 is connected to the gas inlet, the controller 1000 is respectively communicated with the gas proportional valve 1100 and the circulating water pump 710, and the circulating water pump 710 is controlled to operate for a predetermined time after the gas proportional valve 1100 is closed. Specifically, the predetermined time may be less than 30 seconds. Therefore, the controller 1000 can be used for automatically controlling the starting of the circulating water pump 710, after a user stops using water, the gas proportional valve 1100 is closed, gas stops entering the burner 300, the burner 300 stops heating, meanwhile, the controller 1000 controls the circulating pipeline 700 to run, water flow is circulated, and the water flow stops after a preset circulating time, so that energy is saved. Whereby automatic control of the circulation water pump 710 can be achieved.

Specifically, a venturi mixer may be connected to the burner 300, a gas line and an air line may be connected to the venturi mixer, and the circulation cut-off valve 720 may be connected to the gas line. This allows air and gas to be thoroughly mixed in the venturi mixer and delivered to the burner 300.

Advantageously, as shown in fig. 1 and 2, a circulation on-off valve 720 is connected to the circulation line 700, the circulation on-off valve 720 is in communication with the controller 1000, and the controller 1000 controls the circulation on-off valve 720 to be opened for the predetermined time after the gas proportional valve 1100 is closed. Therefore, the circulation on-off valve 720 can be closed when the user uses water normally, cold water at the water inlet pipe 810 is prevented from entering the water outlet pipe 820, and the circulation on-off valve 720 is opened after the user uses water, so that water at the heat exchanger 200 can be circularly exchanged with water in the circulation pipeline 700.

More advantageously, as shown in fig. 1 and 2, the gas water heater 1 further comprises a water flow sensor 1200, the water flow sensor 1200 is connected to the water inlet pipe 810 or the water outlet pipe 820 and is in communication with the controller 1000, and the controller 1000 controls the gas proportional valve 1100 to be closed after the water flow sensor 1200 detects that the water flow stops. In this way, the water flow sensor 1200 can be used to detect whether the user stops using water, so as to automatically control the gas proportional valve 1100 to close, thereby stopping the gas from entering the burner 300.

Specifically, the burner 300 has an ignition device thereon, which communicates with the controller 1000. After the water flow sensor 1200 detects that the water flow starts, the controller 1000 controls the ignition device to ignite if the circulating water pump 710 is not operated. This allows the burner 300 to start heating automatically when the user starts to use water.

Specifically, as shown in fig. 1 and 2, the water flow rate sensor 1200 is connected between the connection node of the circulation line 700 and the water inlet pipe 810 and the water inlet 210. Therefore, after the gas proportional valve 1100 is closed, whether water flows in the water inlet pipe 810 can be detected to judge whether the circulating water pump 710 works normally.

Optionally, a water return pipe joint for connecting a water return pipe is arranged on the circulation pipeline 700. So that the water return pipe can be connected with the water return pipe joint and the water outlet pipe 820 to perform circulation exchange with the water in the heat exchanger 200 by using the water in the water return pipe.

The operation of the gas water heater 1 according to the embodiment of the present invention will be described with reference to fig. 1 and 2.

When a user opens an on-off valve (such as a faucet and a shower head) of the user water end, the water flow sensor 1200 detects that water starts flowing and feeds a signal back to the controller 1000, and the controller 1000 performs discharge ignition on the ignition device and opens the gas proportional valve 1100 to perform normal combustion to provide hot water.

When a user stops using hot water, the water flow sensor 1200 detects that water flow stops flowing, signals are fed back to the controller 1000, the controller 1000 controls the gas proportional valve 1100 to be closed, flame in the combustor 300 is extinguished, meanwhile, the circulation on-off valve 720 is opened, the circulating water pump 710 is started, water in the circulating pipeline 700 and the water storage tank 900 is driven by the circulating water pump 710 to perform internal circulation, local high-temperature hot water in the heat exchanger 200 performs mixed heat exchange with lower-temperature water in the water storage tank 900 in the circulating process, water stored in the water channel reaches heat balance, the water temperature of water stored in the heat exchanger 200 is reduced, and therefore the heat exchanger 200 is not prone to scaling. After the preset time is circulated, the controller 1000 controls the circulation on-off valve 720 to be closed, the circulating water pump 710 stops working, and the gas water heater 1 enters a standby state to wait for the next use of hot water by the user.

Other constructions and operations of the gas water heater 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A gas water heater, comprising:

the heat exchanger is provided with a water inlet and a water outlet;

the combustor is used for heating the heat exchanger and is provided with a gas inlet;

the circulating pipeline is respectively communicated with the water inlet and the water outlet;

the circulating water pump is connected to the circulating pipeline;

the water inlet pipe is respectively communicated with the water inlet and a water source, the water outlet pipe is respectively communicated with the water outlet and a user water end, the circulating pipeline is respectively connected with the water inlet pipe and the water outlet pipe, a connecting node of the circulating pipeline and the water inlet pipe is positioned between the water inlet and the water source, and a connecting node of the circulating pipeline and the water outlet pipe is positioned between the water outlet and the user water end;

the water storage tank is connected to the water inlet pipe and is positioned between a connection node of the circulating pipeline and the water inlet pipe and the water inlet;

the controller is respectively communicated with the gas proportional valve and the circulating water pump and controls the circulating water pump to operate for preset time after the gas proportional valve is closed;

and the circulating pipeline is connected with a circulating on-off valve which is communicated with the controller, and the controller controls the circulating on-off valve to be opened for the preset time after the gas proportional valve is closed.

2. The gas water heater of claim 1, further comprising a water flow sensor connected to the water inlet pipe or the water outlet pipe and in communication with the controller, the controller controlling the gas proportional valve to close after the water flow sensor detects that water flow has stopped.

3. The gas water heater of claim 2, wherein the water flow sensor is connected between a connection node of the circulation line and the water inlet pipe and the water inlet port.

4. The gas water heater according to claim 1, wherein a return pipe joint for connecting a return pipe is provided on said circulation pipeline.