CN221076750U - Gas water heater - Google Patents

Abstract

The utility model discloses a gas water heater, comprising: a shell, on which a water inlet pipe, a water outlet pipe and a zero-cold water pipe are arranged; a heat exchanger, the heat exchanger has a heat exchange pipe, the heat exchange pipe is used for water flow and heat exchange, and the water heater is arranged in the shell; a water pump, the water pump is arranged in the shell; a bypass component, the bypass component comprises a first three-way pipe and a first bypass pipe, and the first bypass pipe is connected to the first three-way pipe; wherein the water outlet port of the heat exchange pipe is connected to the water outlet pipe, the water inlet port of the heat exchange pipe is connected to the first three-way pipe, the water outlet of the water pump is also connected to the first three-way pipe, the zero-cold water pipe is connected to the water inlet of the water pump, and the first bypass pipe is connected to the water inlet pipe. The water resistance is reduced to increase the water outlet flow rate and thus improve the user experience.

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

The gas water heater with the zero cold water function is generally provided with a zero cold water pipe and a circulating water pump, and in the zero cold water mode, the circulating water pump starts to pump water in an external water return pipe of the gas water heater into the heat exchanger for circulating flow.

However, because the water inlet pipes of the zero-cooling water pipe and the gas water heater are respectively connected with the circulating water pump, in the normal water use process by utilizing the water pressure of the external running water pipe, the water conveyed by the water inlet pipe flows through the circulating water pump, and then the circulating water pump generates additional water resistance, so that the water outlet flow is smaller and the use experience of a user is influenced. In view of this, how to design a water heater technology that reduces water resistance to increase water flow and thereby improve user experience is a technical problem to be solved by the present utility model.

Disclosure of utility model

The utility model provides a gas water heater, which can reduce water resistance to increase water outlet flow and further improve user experience.

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

in one aspect, the present utility model provides a gas water heater comprising:

the shell is provided with a water inlet pipe, a water outlet pipe and a zero-cooling water pipe;

A heat exchanger having heat exchange tubes for water supply flow heat exchange, the water heater being disposed in the housing;

a water pump disposed in the housing;

The bypass assembly comprises a first tee pipe and a first bypass pipe, and the first bypass pipe is connected with the first tee pipe;

The water outlet of the heat exchange tube is communicated with the water outlet pipe, the water inlet of the heat exchange tube is communicated with the first three-way pipe, the water outlet of the water pump is also communicated with the first three-way pipe, the zero-cooling water pipe is communicated with the water inlet of the water pump, and the first three-way pipe is connected with the water inlet pipe.

Through setting up bypass subassembly, the first three-way valve in the bypass subassembly is arranged in satisfying the water pump and carries out water route connection's requirement with the heat exchange tube of inlet tube and heat exchanger, and the inlet tube is connected the heat exchange tube through first bypass pipe and is bypassed the water pump, like this, at normal water use in-process, the cold water of follow inlet tube input can be smoothly enter into the heat exchange tube through first bypass pipe, and then effectual weakening causes the play water flow of outlet pipe to diminish because of the water resistance that the water pump produced, realized having increased play water flow in order to improve user experience nature.

In an embodiment of the application, the water inlet pipe and the zero-cooling water pipe are mutually communicated through a connecting pipe, and the first bypass pipe is arranged in parallel with the water pump.

In an embodiment of the application, a first one-way valve is further arranged on the first bypass pipe, and the first one-way valve is configured to limit the water flow in the first bypass pipe from the water inlet pipe to the heat exchange pipe.

In an embodiment of the application, the water tank is connected between the water pump and the zero-cooling water pipe, the water return pipe is connected between the heat exchange pipe and the water outlet pipe, and the second bypass pipe is connected between the water return pipe and the water tank.

In an embodiment of the application, a second three-way pipe is arranged on the water tank, the second three-way pipe is provided with a first interface, a second interface and a third interface, the first interface is connected to the water tank, the second interface is connected with the zero-cooling water pipe, and the third interface is connected with the second bypass pipe.

In an embodiment of the application, a control valve is arranged on the water return pipe, the second bypass pipe is connected between the control valve and the water tank, and the control valve is configured to control the water return pipe to be selectively communicated with the second bypass pipe.

In an embodiment of the application, a second one-way valve is arranged between the control valve and the second bypass pipe, the second one-way valve being configured to restrict the water in the second bypass pipe from flowing in one direction to the water tank.

In one embodiment of the application, the water tank comprises a tank body and two end covers, wherein the end covers are hermetically arranged on corresponding ports of the tank body; the tank body is provided with a first connecting pipe and a second connecting pipe, the first connecting pipe is positioned above the second connecting pipe, the first connecting pipe is connected with an inlet of the water pump, and the second connecting pipe is connected with the l zero cold water pipe.

In an embodiment of the application, a water blocking cover is arranged at the end part of the second connecting pipe extending into the tank body, and the water blocking cover is positioned above the outlet of the second connecting pipe.

In an embodiment of the application, the end cover is further provided with a mounting bracket, and the mounting bracket is fixed on the backboard of the housing.

Drawings

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

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

FIG. 2 is one of the partial schematic structural diagrams of FIG. 1;

FIG. 3 is a second partial schematic view of the structure of FIG. 1;

FIG. 4 is a schematic view of another embodiment of the gas water heater of the present utility model;

FIG. 5 is an enlarged partial schematic view of area A of FIG. 4;

Fig. 6 is a schematic view of the structure of the water tank in fig. 4;

Fig. 7 is a cross-sectional view of the water tank of fig. 4.

Reference numerals illustrate:

1. a housing;

11. a water inlet pipe; 12. A water outlet pipe; 13. zero cooling water pipe;

2. a heat exchanger;

3. a water pump;

4. a bypass assembly;

41. a first tee; 42. a first bypass pipe;

5. a water tank;

51. A tank body; 52. an end cap; 53. a first connection pipe; 54. a second connection pipe; 55. a water retaining cover; 56. a mounting bracket;

6. A control valve;

7. A water return pipe;

8. A second bypass pipe;

9. and a second three-way pipe.

Detailed Description

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

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

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

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

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

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

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

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

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

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

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

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

Heat generated by combustion of the fuel gas during operation of the burner is conducted to the housing in order to reduce heat transfer.

In a first embodiment, as shown in fig. 1 to 3, in an embodiment of the present application, a gas water heater is provided, including:

The water inlet pipe 11, the water outlet pipe 12 and the zero-cooling water pipe 13 are arranged on the shell 1;

A heat exchanger 2, the heat exchanger 2 having heat exchange tubes for water supply flow heat exchange, the water heater being provided in the housing 1;

A water pump 3, the water pump 3 being arranged in the housing 1;

A bypass assembly 4, the bypass assembly 4 comprising a first tee 41 and a first bypass 42, the first bypass 42 being connected to the first tee 41;

The water outlet port of the heat exchange tube is communicated with the water outlet tube 12, the water inlet port of the heat exchange tube is communicated with the first three-way tube 41, the water outlet of the water pump 3 is also communicated with the first three-way tube 41, the zero-cooling water tube 13 is communicated with the water inlet of the water pump 3, and the first three-way tube 42 is connected with the water inlet tube 11.

Specifically, the heat exchanger 2, the water pump 3, and the bypass assembly 4 are installed in the housing 1 of the gas water heater in the present embodiment. Wherein, the water inlet pipe 11, the water outlet pipe 12 and the zero cooling water pipe 13 arranged on the shell 1 are used for connecting corresponding water pipes in the home of a user.

For the water inlet pipe 11, the water inlet pipe 11 is communicated with the heat exchange pipe of the heat exchanger 2 through the first bypass pipe 42, and after the zero-cooling water pipe 13 is connected with the water pump 3, the water pump 3 and the first bypass pipe 42 are communicated with the heat exchange pipe of the heat exchanger 2 through the first bypass pipe 41.

In actual use, when a user normally uses water and relies on the water pressure of the tap water pipe to supply water, the water flowing in from the water inlet pipe 11 can bypass the water pump 3 via the first bypass pipe 42 and enter the heat exchange pipe of the heat exchanger 2. Thus, the water yield of the water outlet pipe 12 is effectively reduced due to the water resistance generated by the water pump 3.

Through setting up bypass subassembly 4, the first three-way valve in the bypass subassembly 4 is arranged in satisfying the water pump 3 and carries out water route connection's requirement with the heat exchange tube of inlet tube 11 and heat exchanger 2, and inlet tube 11 bypasses water pump 3 through first bypass pipe 42 and connects the heat exchange tube, like this, at normal water use in-process, the cold water of follow inlet tube 11 input can be through the smooth and easy entering into the heat exchange tube of first bypass pipe 42, and then effectual weakening causes outlet pipe 12's play water flow to diminish because of the water resistance that water pump 3 produced, the realization has increased out water flow and has used experience nature in order to improve the user.

In an embodiment of the present application, the water inlet pipe 11 and the zero-cooling water pipe 13 are mutually communicated through a connecting pipe, and the first bypass pipe 42 is arranged in parallel with the water pump 3.

Specifically, for the water inlet pipe 11 and the zero-cooling water pipe 13, the two pipes can be mutually communicated through the connecting pipe, so that during use, cold water output by the water inlet pipe 11 can be directly conveyed to the first three-way pipe 41 and flows into the heat exchanger 2 through the first by-pass pipe 42, and partial water flow can be conveyed into the heat exchanger 2 through the water pump 3 through the connecting pipe.

In another embodiment of the present application, a first check valve (not shown) is further provided on the first bypass pipe 42, and the first check valve is configured to limit the flow of water in the first bypass pipe 42 from the water inlet pipe 11 to the heat exchange pipe.

Specifically, in order to avoid the reverse flow of the water in the first bypass pipe 42 during the operation of the water pump 3, a first check valve may be further provided on the first bypass pipe 42. The first check valve is used to make the water flow in the first bypass pipe 42 flow only in one direction, i.e. the water flow output from the water inlet pipe 11 only flows from the first bypass pipe 42 to the heat exchanger 2 in one direction.

In the second embodiment, as shown in fig. 4-7, the problem of large fluctuation of water outlet temperature caused by water entrainment generated by secondary boiled water is solved. The gas water heater in another embodiment of the application further comprises: the water tank 5 is connected between the water pump 3 and the zero-cooling water pipe 13, the water return pipe 7 is connected between the heat exchange pipe and the water outlet pipe 12, and the second bypass pipe 8 is connected between the water return pipe 7 and the water tank 5.

Specifically, in the use process, there is a case of restarting water after water is shut off for a short time, namely, secondary boiled water. Before the user takes place the secondary boiled water, because a certain amount of hot water is stored in the heat exchanger 2 and the waste heat of the heat exchanger 2 can continuously heat the water, in order to make full use of the waste heat of the heat exchanger 2 to heat the water and solve the technical problem that the water outlet temperature fluctuates due to the secondary boiled water.

After the user turns off the water in a short time, the control valve 6 will act to allow the water return pipe 7 to communicate with the second bypass pipe 8, and further allow the heat exchanger 2, the water return pipe 7, the second bypass pipe 8, the water tank 5 and the water pump 3 to communicate in sequence to form a closed-loop water circulation flow path.

After the control valve 6 communicates the water return pipe 7 with the second bypass pipe 8, the water pump 3 is started, under the action of the water pump 3, water in the water tank 5 is input into the heat exchanger 2, meanwhile, water in the heat exchanger 2 is circulated back into the water tank 5, and then the water in the water tank 5 is circularly heated by the heat exchanger 2.

Thus, when the user uses the boiled water for the second time, the control valve 6 blocks the flow path between the return pipe 7 and the second bypass pipe 8. The burner will retard ignition while the water pump 3 continues to be in energized rotation. Under the suction effect of the water pump 3, cold water introduced by the water inlet pipe 11 enters the water tank 5, hot water in the water tank 5 flows into the heat exchanger 2, and further, the relatively stable output of hot water by the water outlet pipe 12 is realized, so that the fluctuation range of the temperature of the water outlet is reduced.

And after the burner is started, the water pump 3 is powered off, and cold water introduced from the water inlet pipe 11 enters the heat exchanger 2 through the first bypass pipe 42 to continue the conventional heating.

Through configuration water pitcher 5 at the import of water pump 3, in the use, when the user opens the gas heater under the condition of closing water briefly after, control return pipe 7 and second bypass pipe 8 intercommunication through control valve 6, and start water pump 3 so that the inside water circulation of gas heater flows between heat exchanger 2 and water pitcher 5, and then utilize the waste heat of heat exchanger 2 to heat the water in water pitcher 5, and then the user is when secondary water, the gas heater delays the ignition in-process, the hot water in water pitcher 5 will get into in heat exchanger 2, so that outlet pipe 12 can output the hot water of relative constant temperature, in order to alleviate the fluctuation range of secondary boiled water temperature, user experience nature has been improved.

In an embodiment of the present application, a second tee pipe 9 is disposed on the water tank 5, the second tee pipe 9 has a first interface, a second interface and a third interface, the first interface is connected to the water tank 5, the second interface is connected to a zero-cooling water pipe 13, and the third interface is connected to the second bypass pipe 8.

Specifically, in order to facilitate connection between the second bypass pipe 8 and the water tank 5, a second tee pipe 9 is disposed on the water tank 5, and the second bypass pipe 8 and the zero-cooling water pipe 13 are respectively connected to corresponding interfaces of the second tee pipe 9.

In one embodiment of the present application, the water tank 5 includes a tank body 51 and two end caps 52, and the end caps 52 are hermetically disposed on corresponding ports of the tank body 51; the tank body 51 is provided with a first connecting pipe 53 and a second connecting pipe 54, the first connecting pipe 53 is positioned above the second connecting pipe 54, the first connecting pipe 53 is connected with the inlet of the water pump 3, and the second connecting pipe 54 is connected with the zero-cooling water pipe.

Specifically, the water tank 5 is provided with a first connection pipe 53 and a second connection pipe 54 arranged up and down on the tank body 51 thereof, the first connection pipe 53 positioned above being used for outputting water in the water tank 5, and the second connection pipe 54 positioned below being used for introducing external water into the water tank 5.

In order to increase the hot water output rate of the water tank 5, the first connection pipe 53 and the second connection pipe 54 are arranged in a staggered manner, for example, the first connection pipe 53 is located at one end of the tank 51, and the second connection pipe 54 is located at the other end of the tank 51. Thus, at the time of the secondary boiled water, the water inlet pipe 11 introduces the cold water into the water tank 5 through the second connection pipe 54, and the water heat in the water tank 5 can be outputted through the first connection pipe 53 remote from the second connection pipe 54, so as to increase the output rate of the hot water.

In one embodiment, the end of the second connection pipe 54 extending into the tank 51 is provided with a water blocking cover 55, and the water blocking cover 55 is located above the outlet of the second connection pipe 54.

Specifically, in order to further increase the hot water output rate of the water tank 5, the cold water entering at the initial stage of the secondary boiled water is pulled down to lower the upper hot water output rate in the water tank 5. The second connecting pipe 54 is provided with the water blocking cover 55, and the water blocking cover 55 covers the port of the second connecting pipe 54 located in the tank body 51, so that cold water input by the second connecting pipe 54 is blocked and dispersed to the bottom of the water tank 5 by the water blocking cover 55, and the influence on hot water at the top of the water tank 5 is reduced to the greatest extent.

In another embodiment, the end cover 52 is further provided with a mounting bracket 56, and the mounting bracket 56 is fixed on the back plate of the housing 1.

Specifically, in the process of installing the water tank 5 to the housing 1, the water tank 5 can be directly and fixedly installed on the back plate of the housing 1 through the installation bracket 56, so that the assembly of operators is facilitated.

In another embodiment of the application, a second non-return valve is arranged between the control valve 6 and the second bypass pipe 8, the second non-return valve being configured to restrict the unidirectional flow of water in the second bypass pipe 8 to the water tank 5.

Specifically, in the process that the gas water heater is in the self-circulation before the secondary boiled water, since the water inlet pipe 11 and the second bypass pipe 8 are also communicated with each other through the second three-way pipe 9, in order to avoid that cold water reversely flows through the second bypass pipe 8 due to the water pressure effect of the tap water pipe when the water pump 3 is not started, a second one-way valve can be arranged between the control valve 6 and the second bypass pipe 8, and the second one-way valve can limit the water flow direction of the second bypass pipe 8, so that water in the second bypass pipe 8 cannot reversely flow. Further, it is ensured that after the start-up of the water pump 3, the water in the heat exchanger 2 flows into the water tank 5 via the second bypass pipe 8.

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

Claims (10)

1. A gas water heater, comprising:

the shell is provided with a water inlet pipe, a water outlet pipe and a zero-cooling water pipe;

A heat exchanger having heat exchange tubes for water supply flow heat exchange, the water heater being disposed in the housing;

a water pump disposed in the housing;

The bypass assembly comprises a first tee pipe and a first bypass pipe, and the first bypass pipe is connected with the first tee pipe;

The water outlet of the heat exchange tube is communicated with the water outlet tube, the water inlet of the heat exchange tube is communicated with the first three-way tube, the water outlet of the water pump is also communicated with the first three-way tube, the zero-cooling water tube is communicated with the water inlet of the water pump, and the first three-way tube is connected with the water inlet tube;

in addition, the gas water heater further comprises a water tank, a second bypass pipe and a water return pipe, wherein the water tank is connected between the water pump and the zero-cooling water pipe, the water return pipe is connected between the heat exchange pipe and the water outlet pipe, and the second bypass pipe is connected between the water return pipe and the water tank.

2. The gas water heater according to claim 1, wherein the water inlet pipe and the zero-cooling water pipe are communicated with each other through a connecting pipe, and the first bypass pipe is arranged in parallel with the water pump.

3. The gas water heater of claim 1, wherein a first one-way valve is further provided on the first bypass pipe, the first one-way valve configured to restrict water flow in the first bypass pipe from the inlet pipe to the heat exchange pipe.

4. The gas water heater of claim 1, wherein a second tee is provided on the water tank, the second tee having a first interface, a second interface, and a third interface, the first interface being connected to the water tank, the second interface being connected to the zero cold water pipe, the third interface being connected to the second bypass pipe.

5. A gas water heater according to claim 1, wherein a control valve is provided on the return pipe, the second bypass pipe being connected between the control valve and the water tank, the control valve being configured to control the return pipe to selectively communicate with the second bypass pipe.

6. The gas water heater according to claim 5, wherein the control valve is configured to communicate the return pipe with the second bypass pipe after a short time of closing the water by a user so that the heat exchanger, the return pipe, the second bypass pipe, the water tank, and the water pump are sequentially communicated to form a closed-loop water circulation flow path.

7. The gas water heater of claim 5, wherein a second one-way valve is disposed between the control valve and the second bypass pipe, the second one-way valve configured to restrict one-way flow of water in the second bypass pipe to the water tank.

8. The gas water heater of claim 1, wherein the water tank comprises a tank body and two end caps, the end caps being sealingly disposed on corresponding ports of the tank body; the tank body is provided with a first connecting pipe and a second connecting pipe, the first connecting pipe is positioned above the second connecting pipe, the first connecting pipe is connected with an inlet of the water pump, and the second connecting pipe is connected with the zero-cooling water pipe.

9. The gas water heater of claim 8, wherein an end of the second connecting tube extending into the tank is provided with a water shield above an outlet of the second connecting tube.

10. The gas water heater of claim 8, wherein the end cap is further provided with a mounting bracket secured to the back plate of the housing.