CN215892768U - Phase-change heat storage type gas water heater - Google Patents

Abstract

The utility model relates to a phase-change heat storage type gas water heater which comprises a host, a phase-change heat storage device, a cold water inlet main pipe, a hot water outlet main pipe, a first switch valve and a second switch valve. When the phase-change water heater works in a phase-change hot water working mode, the first switch valve is closed, the second switch valve is opened, cold water of the cold water inlet main pipe enters the first heat exchange pipe through the first connecting pipe, heat stored by the phase-change material is heated for water in the first heat exchange pipe, hot water enters the second connecting pipe, and the hot water is discharged outwards through the second connecting pipe and the hot water outlet main pipe and is provided for a user. The phase-change material of the phase-change heat storage device is used for storing heat energy, and when a user needs to use hot water, the phase-change heat storage type gas water heater is operated in a phase-change hot water working mode, so that constant-temperature water outlet can be realized; in addition, the heat storage capacity of the phase-change heat storage device is far stronger than that of a traditional water storage tank, the product size is smaller, the assembly operation is more convenient, and the maintenance cost is lower.

Description

Phase-change heat storage type gas water heater

Technical Field

The utility model relates to the technical field of gas water heaters, in particular to a phase-change heat storage type gas water heater.

Background

The gas water heater has the characteristics of instant heating, high heat efficiency, high heating speed and the like, and has more user groups. Generally, a gas water heater is installed in a balcony or a kitchen, and water can be heated to a proper temperature after being started for a period of time, so that waste of water and gas is caused, and the temperature of water in use is unstable, so that the phenomenon of sudden cooling and sudden heating is easy to occur. Traditionally, the water storage formula gas heater with water storage function is provided with the great water storage tank of volume, and the hot water after will heating through the water storage tank keeps warm and stores, when needing to use hot water, discharges out the hot water in the water storage tank, nevertheless goes out the water and is not "running water". However, the conventional water storage type gas water heater requires a relatively large volume of product when the water storage tank stores and discharges hot water of a predetermined volume, and is inconvenient in assembly operation due to a complex self pipeline structure, and requires regular cleaning and maintenance, which results in a high maintenance cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a phase-change heat storage type gas water heater, which can effectively realize constant-temperature water outlet without storing hot water in advance, and meanwhile, can reduce the volume of a product, is convenient to assemble and operate and has lower maintenance cost.

The technical problem is solved by the following technical scheme:

a phase change heat storage gas water heater, phase change heat storage gas water heater includes:

the main machine is provided with a first cold water inlet pipe and a first hot water outlet pipe;

the phase change heat storage device comprises a shell component, a phase change material, a first heat exchange tube, a first connecting tube and a second connecting tube; the first heat exchange tube is arranged in the shell assembly, the phase change material is filled in the shell assembly and positioned outside the first heat exchange tube, two ends of the first heat exchange tube are respectively connected with the first connecting tube and the second connecting tube, and the first connecting tube and the second connecting tube both penetrate through the shell assembly and extend out of the shell assembly; the first connecting pipe is communicated with the first cold water inlet pipe, and the first connecting pipe and the first cold water inlet pipe are also communicated with the cold water inlet main pipe; the second connecting pipe is communicated with the first hot water outlet pipe, and the second connecting pipe and the first hot water outlet pipe are also communicated with the hot water outlet header pipe;

the first switch valve is arranged on the first cold water inlet pipe, and the second switch valve is arranged on the first connecting pipe.

Compared with the background technology, the phase-change heat storage type gas water heater has the following beneficial effects:

when the phase-change heat storage type gas water heater works in a phase-change energy storage working mode, the first switch valve is opened, the second switch valve is opened, and the host machine works; when the phase-change water heater works in a phase-change hot water working mode, the first switch valve is closed, the second switch valve is opened, cold water of the cold water inlet main pipe enters the first heat exchange pipe through the first connecting pipe, heat stored by the phase-change material is heated for water in the first heat exchange pipe, hot water obtained through heating enters the second connecting pipe, and the hot water is discharged outwards through the second connecting pipe and the hot water outlet main pipe and is provided for a user. Therefore, heat energy can be stored through the phase-change material of the phase-change heat storage device, and when a user needs to use hot water, the phase-change heat storage type gas water heater operates in a phase-change hot water working mode, so that constant-temperature water outlet can be effectively realized; in addition, the heat storage capacity of the phase-change heat storage device is far stronger than that of a traditional water storage tank, the product size is smaller, the assembly operation is more convenient, and the maintenance cost is lower.

In one embodiment, the host includes a controller, the first switch valve and the second switch valve are both control switch valves, and the controller is electrically connected to the first switch valve and the second switch valve respectively. So, the controller of host computer is more than controlling devices such as water pump, fan and combustor work of self, can also control first ooff valve and the work of second ooff valve, and degree of automation is higher, just so need not artificial manual adjustment first ooff valve and the state of opening and shutting of second ooff valve.

In one embodiment, the phase-change heat storage type gas water heater further includes a first temperature sensor, the controller is electrically connected to the first temperature sensor, and the first temperature sensor is disposed on the second connecting pipe and used for acquiring water temperature information on the second connecting pipe. Therefore, the first temperature sensor can acquire the water temperature information on the second connecting pipe, so that in the phase change energy storage working mode, the first temperature sensor can acquire the water temperature information entering the first heat exchange pipe from the second connecting pipe and provide the water temperature information to the controller, and the controller determines whether to continue the phase change energy storage working mode; likewise, in the phase change hot water operation mode, the first temperature sensor can acquire information on the temperature of water discharged from the first heat exchange pipe to the second connection pipe.

In one embodiment, the phase-change heat storage type gas water heater further comprises a water mixing pipe and a flow regulating valve; the flow control valve is electrically connected with the controller, the flow control valve is arranged on the water mixing pipe, and the first connecting pipe is also communicated with the second connecting pipe through the water mixing pipe. So, when work in phase transition hot water mode of operation, one of them part cold water of first connecting pipe can enter into in the first heat exchange pipe, the heat that phase change material stored heaies up for the water in the first heat exchange pipe, the hot water that the intensification obtained enters into the second connecting pipe, another part cold water of first connecting pipe enters into the second connecting pipe through mixing the water pipe and mixes with the outside hot water that discharges of first heat exchange pipe mutually, adjust the cold water rivers size of mixing the water pipe through flow control valve, thereby alright with the hot water temperature of adjustment second connecting pipe, the hot water delivery after the second connecting pipe will mix gives hot water main, outwards discharge by hot water main and provide the user. In addition, when the water heater works in a phase change energy storage working mode or a common hot water working mode, the flow regulating valve can be in any opening degree and is not limited.

In one embodiment, a first three-way pipe is arranged on the first connecting pipe, and the first connecting pipe is connected with one end of the water mixing pipe through the first three-way pipe; and a second three-way pipe is arranged on the second connecting pipe, and the second connecting pipe is connected with the other end of the water mixing pipe through the second three-way pipe. So, can be convenient for fast with first connecting pipe and muddy water pipe equipment connection through first three-way pipe, can be convenient for fast with second connecting pipe and muddy water pipe equipment connection through the second three-way pipe.

In one embodiment, the phase change thermal storage type gas water heater further comprises a second temperature sensor; the controller is electrically connected with the second temperature sensor; the second temperature sensor is arranged on the first cold water inlet pipe and used for acquiring water temperature information on the first cold water inlet pipe; the phase-change heat storage type gas water heater also comprises a third temperature sensor; the controller is electrically connected with the third temperature sensor; the third temperature sensor is arranged on the first hot water outlet pipe and used for acquiring water temperature information on the first hot water outlet pipe. Therefore, when the phase-change heat storage device works in a phase-change energy storage working mode, the water temperature information entering the first heat exchange pipe through the second connecting pipe is obtained according to the first temperature sensor, the water temperature information entering the first cold water inlet pipe through the first connecting pipe is obtained through the second temperature sensor, the water temperature difference between the first heat exchange pipe and the second heat exchange pipe is obtained, when the water temperature difference is smaller than 5 ℃ for example, and the water temperature information obtained through the second temperature sensor is larger than 65 ℃ for example, the set temperature of the phase-change energy storage is 60 ℃ for example, and the fact that the heat storage amount of the phase-change heat storage device is enough is shown to meet the requirement.

In one embodiment, the phase-change heat storage type gas water heater further comprises a third on-off valve; the third switch valve is arranged on the first hot water outlet pipe; the third switch valve is a control switch valve, and the controller is electrically connected with the third switch valve. Therefore, when the solar water heater works in a phase change energy storage working mode or a common hot water working mode, the controller controls the third switch valve to be opened; when the phase change hot water heating device works in the phase change hot water working mode, the controller can control the third switch valve to open or close, and the control method is not limited herein.

In one embodiment, the first connecting pipe, the first cold water inlet pipe and the cold water inlet main pipe are connected through a first three-way joint; the second connecting pipe, the first hot water outlet pipe and the hot water outlet main pipe are connected through a second three-way joint.

In one embodiment, the shell assembly comprises an inner shell, an outer shell sleeved outside the inner shell, and an insulation material filled between the inner shell and the outer shell; the first connecting pipe and the second connecting pipe penetrate through the inner shell and the outer shell and extend out of the outer shell. Therefore, the heat insulation material has a good heat insulation effect, and can reduce the transmission loss of heat stored by the phase change material to the external environment.

In one embodiment, the first heat exchange tube is an S-shaped tube, a spiral tube or a coiled tube; and the outer wall of the first heat exchange tube is provided with a plurality of heat exchange fins. Therefore, the heat exchange effect between the first heat exchange tube and the phase change material is better.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only 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 diagram of a phase-change heat storage type gas water heater according to an embodiment of the present invention, when the gas water heater operates in a phase-change hot water operation mode;

fig. 2 is a schematic structural diagram of a phase change heat storage type gas water heater according to an embodiment of the present invention, which operates in a phase change energy storage mode;

fig. 3 is a schematic structural diagram of a phase-change heat storage type gas water heater according to an embodiment of the present invention, which operates in a normal hot water operation mode;

fig. 4 is a schematic structural diagram of a phase change heat storage type gas water heater according to another embodiment of the present invention.

Reference numerals:

10. a host; 11. a first cold water inlet pipe; 12. a first hot water outlet pipe; 13. a water pump; 14. a fan; 15. a burner; 16. a heat exchanger; 161. a second heat exchange tube; 20. a phase change heat storage device; 21. a housing assembly; 211. an inner housing; 212. an outer housing; 213. a thermal insulation material; 22. a phase change material; 23. a first heat exchange tube; 24. a first connecting pipe; 25. a second connecting pipe; 26. heat exchange fins; 30. a cold water inlet main pipe; 40. a hot water outlet main pipe; 50. a water mixing pipe; 60. a flow regulating valve; k1, a first on-off valve;

k2, a second on-off valve; k3, a third on-off valve; t1, a first temperature sensor; t2, second temperature sensor; t3, third temperature sensor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 to 3, fig. 1 shows a schematic structural diagram of a phase change heat storage type gas water heater according to an embodiment of the present invention when operating in a phase change hot water operating mode, fig. 2 shows a schematic structural diagram of a phase change heat storage type gas water heater according to an embodiment of the present invention when operating in a phase change energy storage operating mode, and fig. 3 shows a schematic structural diagram of a phase change heat storage type gas water heater according to an embodiment of the present invention when operating in a normal hot water operating mode. An embodiment of the present invention provides a phase change heat storage type gas water heater, including: the system comprises a main machine 10, a phase change heat storage device 20, a cold water inlet manifold 30, a hot water outlet manifold 40, a first switch valve K1 and a second switch valve K2. The main body 10 is provided with a first cold water inlet pipe 11 and a first hot water outlet pipe 12. The phase change heat storage device 20 includes a housing assembly 21, a phase change material 22, a first heat exchange tube 23, a first connection tube 24, and a second connection tube 25. The first heat exchange tube 23 is disposed inside the shell assembly 21, the phase change material 22 is filled inside the shell assembly 21 and located outside the first heat exchange tube 23, and both ends of the first heat exchange tube 23 are respectively connected with the first connection tube 24 and the second connection tube 25. The first connection pipe 24 and the second connection pipe 25 extend through the housing assembly 21 to the outside of the housing assembly 21. The first connecting pipe 24 is communicated with the first cold water inlet pipe 11, and the first connecting pipe 24 and the first cold water inlet pipe 11 are also communicated with the cold water inlet manifold 30. The second connecting pipe 25 is communicated with the first hot water outlet pipe 12, and both the second connecting pipe 25 and the first hot water outlet pipe 12 are also communicated with a hot water outlet header pipe 40. The first switching valve K1 is disposed on the first cold water inlet pipe 11, and the second switching valve K2 is disposed on the first connecting pipe 24.

When the phase-change heat storage type gas water heater works in a phase-change energy storage working mode, the first switch valve K1 is opened, the second switch valve K2 is opened, and the host 10 works, under the power of the host 10, water in the phase-change heat storage device 20 circularly flows through the first connecting pipe 24, the first cold water inlet pipe 11, the host 10, the first hot water outlet pipe 12, the second connecting pipe 25 and the first heat exchange pipe 23, the host 10 can gradually increase the water temperature, the hot water circularly flows through the first heat exchange pipe 23 and exchanges heat with the phase-change material 22 through the first heat exchange pipe 23, and the phase-change material 22 absorbs heat and can store heat energy; when the phase change hot water heating device works in a phase change hot water working mode, the first switch valve K1 is closed, the second switch valve K2 is opened, cold water of the cold water inlet manifold 30 enters the first heat exchange tube 23 through the first connecting tube 24, heat stored in the phase change material 22 raises the temperature of water in the first heat exchange tube 23, hot water obtained through temperature rise enters the second connecting tube 25, and the hot water is discharged outwards through the second connecting tube 25 and the hot water outlet manifold 40 and is provided for users. Therefore, heat energy can be stored through the phase-change material 22 of the phase-change heat storage device 20, and when a user needs to use hot water, the phase-change heat storage type gas water heater operates in a phase-change hot water working mode, so that constant-temperature water outlet can be effectively realized; in addition, the heat storage capacity of the phase change heat storage device 20 is far stronger than that of the traditional water storage tank, the product size is smaller, the assembly operation is more convenient, and the maintenance cost is lower.

Referring to fig. 3, further, the phase-change heat storage type gas water heater further includes a normal hot water operation mode. When the water heater works in a common hot water working mode, the first switch valve K1 is opened, the second switch valve K2 is closed, the main unit 10 works, under the power of the main unit 10, cold water enters the main unit 10 through the cold water inlet main pipe 30 and the first cold water inlet pipe 11, and the main unit 10 heats the cold water and then discharges the cold water to a user through the first hot water outlet pipe 12 and the hot water outlet main pipe 40.

It should be noted that the "first connecting pipe 24 and the second connecting pipe 25" may be a part of the "first heat exchanging pipe 23", that is, the "first connecting pipe 24 and the second connecting pipe 25" and the "other part of the first heat exchanging pipe 23" are integrally formed; or a separate member which can be separated from the other portion of the first heat exchange pipe 23, i.e., "the first connection pipe 24 and the second connection pipe 25" can be manufactured separately and then combined with the other portion of the first heat exchange pipe 23 as a whole.

It should be noted that the cold water inlet manifold 30 may be a part of the first cold water inlet pipe 11, that is, the cold water inlet manifold 30 and the other part of the first cold water inlet pipe 11 are integrally formed; or a separate component which can be separated from the other parts of the first cold water inlet pipe 11, namely, the cold water inlet manifold 30 can be manufactured separately and then combined with the other parts of the first cold water inlet pipe 11 into a whole.

It should be noted that the phase change material 22 is, for example, an organic phase change material, an inorganic phase change material, or a mixed phase change material in which an organic phase change material and an inorganic phase change material are mixed with each other, and the like, and is not limited herein. A specific example of the phase transition temperature of the phase change material 22 is 40 ℃ to 80 ℃, and specifically, the phase transition temperature of the phase change material 22 in this embodiment is 55 ℃, 58 ℃, 60 ℃, 62 ℃ or 65 ℃, for example, when the temperature of the phase change material 22 is higher than the phase transition temperature, the phase change material 22 is changed from a solid state to a liquid state or a state in which solid and liquid coexist, and thermal energy storage can be realized.

Referring to fig. 1 to 3, in one embodiment, the host 10 includes a controller (not shown). The first switch valve K1 and the second switch valve K2 are control switch valves. The controller is electrically connected with the first switch valve K1 and the second switch valve K2 respectively.

Specifically, the main unit 10 further includes a water pump 13, a fan 14, a burner 15, and a heat exchanger 16. The water pump 13, the fan 14 and the burner 15 are all electrically connected with the controller. The heat exchanger 16 is provided with a second heat exchange tube 161, and two ends of the second heat exchange tube 161 are respectively communicated with the first cold water inlet tube 11 and the first hot water outlet tube 12. In addition, a water pump 13 is provided on the first cold water inlet pipe 11 for providing power to pump water into the second heat exchanging pipe 161. When the fan 14 works, secondary air is blown into the combustion chamber, fuel gas is combusted through the combustor 15 to provide heat for the heat exchanger 16, the heat exchanger 16 transfers heat to water in the second heat exchange tube 161 to raise the water temperature, and hot water generated by the second heat exchange tube 161 is discharged through the first hot water outlet pipe 12.

Therefore, the controller of the main unit 10 can control the first switch valve K1 and the second switch valve K2 to work, not only the water pump 13, the fan 14, the burner 15 and other devices of the main unit to work, but also the first switch valve K1 and the second switch valve K2 to work, and the degree of automation is high, so that the opening and closing states of the first switch valve K1 and the second switch valve K2 do not need to be manually adjusted.

As an alternative, the first switch valve K1 and the second switch valve K2 are both manual switch valves, and the open/close state is adjusted by manual rotation.

Referring to fig. 1 again, in one embodiment, the phase change thermal storage type gas water heater further includes a first temperature sensor T1. The controller is electrically connected to the first temperature sensor T1, and the first temperature sensor T1 is disposed on the second connecting pipe 25 for acquiring water temperature information of the second connecting pipe 25. Thus, the first temperature sensor T1 can obtain the water temperature information on the second connection pipe 25, so that in the phase change energy storage operation mode, the first temperature sensor T1 can obtain the water temperature information entering the first heat exchange pipe 23 through the second connection pipe 25 and provide the water temperature information to the controller, and the controller determines whether to continue the phase change energy storage operation mode; also, the first temperature sensor T1 can acquire information on the temperature of water discharged from the first heat exchanging pipe 23 to the second connection pipe 25 in the phase change hot water operation mode.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a phase change heat storage type gas water heater according to another embodiment of the present invention. In one embodiment, the phase change thermal storage type gas water heater further comprises a water mixing pipe 50 and a flow regulating valve 60. The flow control valve 60 is electrically connected to the controller, and the flow control valve 60 is disposed on the water mixing pipe 50. The first connection pipe 24 is also communicated with the second connection pipe 25 through a water mixing pipe 50. Thus, when the phase change hot water heating device works in the phase change hot water working mode, a part of cold water in the first connection pipe 24 can enter the first heat exchange pipe 23, the heat stored in the phase change material 22 heats the water in the first heat exchange pipe 23, the heated hot water enters the second connection pipe 25, another part of cold water in the first connection pipe 24 enters the second connection pipe 25 through the water mixing pipe 50 to be mixed with the hot water discharged outside from the first heat exchange pipe 23, the flow of the cold water in the water mixing pipe 50 is adjusted through the flow adjusting valve 60, so that the temperature of the hot water in the second connection pipe 25 can be adjusted, the mixed hot water is delivered to the hot water outlet header pipe 40 by the second connection pipe 25, and the hot water is discharged outside by the hot water outlet header pipe 40 and provided to a user. In addition, when the device works in the phase change energy storage working mode or the ordinary hot water working mode, the flow regulating valve 60 may have any opening degree, and is not limited.

Referring to fig. 4, in one embodiment, a first tee (not shown) is disposed on the first connection pipe 24, and the first connection pipe 24 is connected to one end of the mixing pipe 50 through the first tee. The second connecting pipe 25 is provided with a second three-way pipe (not shown in the figure), and the second connecting pipe 25 is connected with the other end of the water mixing pipe 50 through the second three-way pipe. So, can be convenient for fast with first connecting pipe 24 and muddy water pipe 50 assembly connection through the first three-way pipe, can be convenient for fast with second connecting pipe 25 and muddy water pipe 50 assembly connection through the second three-way pipe. It can be understood that, as an alternative, the first three-way pipe and the second three-way pipe may also be omitted, that is, the pipe wall of the first connecting pipe 24 is provided with a first through hole, the pipe wall of the second connecting pipe 25 is provided with a second through hole, so that one end of the water mixing pipe 50 is communicated with the first through hole by welding, bonding, and the like, and the other end of the water mixing pipe 50 is communicated with the second through hole.

Referring to fig. 1 or 4, in one embodiment, the phase-change heat storage type gas water heater further includes a second temperature sensor T2. The controller is electrically connected with the second temperature sensor T2. The second temperature sensor T2 is disposed on the first cold water inlet pipe 11 and is used for acquiring water temperature information of the first cold water inlet pipe 11. In addition, the phase-change thermal storage type gas water heater also comprises a third temperature sensor T3. The controller is electrically connected with the third temperature sensor T3. The third temperature sensor T3 is disposed on the first hot water outlet pipe 12 for acquiring the water temperature information on the first hot water outlet pipe 12. Thus, when the phase change heat storage device works in the phase change energy storage working mode, the water temperature information entering the first heat exchange pipe 23 through the second connecting pipe 25 is acquired according to the first temperature sensor T1, and the water temperature information entering the first cold water inlet pipe 11 through the first connecting pipe 24 is acquired according to the second temperature sensor T2, so that the water temperature difference between the first heat exchange pipe and the second heat exchange pipe is obtained, when the water temperature difference is less than 5 ℃ for example, and the water temperature information acquired by the second temperature sensor T2 is greater than 65 ℃ for example, the set temperature of the phase change energy storage is 60 ℃ for example, which indicates that the heat storage amount of the phase change heat storage device 20 is sufficient and meets the requirement.

In addition, the third temperature sensor T3 obtains the temperature information of the first hot water outlet pipe 12, and it can be determined whether the temperature of the hot water heated by the host 10 meets the requirement according to the temperature information obtained by the third temperature sensor T3.

Referring to fig. 4, in an embodiment, the phase change heat storage type gas water heater further includes a third on/off valve K3. The third switch valve K3 is disposed on the first hot water outlet pipe 12. The third switch valve K3 is a control switch valve, and the controller is further electrically connected to the third switch valve K3. Therefore, when the device works in a phase change energy storage working mode or a common hot water working mode, the controller controls the third switch valve K3 to be opened; when the phase change hot water operation mode is operated, the controller may control the third switching valve K3 to open or close, which is not limited herein.

Referring to fig. 4, in one embodiment, the first connecting pipe 24, the first cold water inlet pipe 11 and the cold water inlet manifold 30 are connected by a first three-way joint (not shown). In addition, the second connecting pipe 25, the first hot water outlet pipe 12 and the hot water outlet manifold 40 are connected by a second three-way joint (not shown).

Referring to fig. 4, in one embodiment, the housing assembly 21 includes an inner housing 211, an outer housing 212 sleeved outside the inner housing 211, and a thermal insulation material 213 filled between the inner housing 211 and the outer housing 212. The first connection pipe 24 and the second connection pipe 25 extend through the inner housing 211 and the outer housing 212 to the outside of the outer housing 212. Thus, the thermal insulation material 213 plays a better thermal insulation role, and can reduce the transmission loss of the heat stored in the phase change material 22 to the external environment.

Referring to fig. 4, in one embodiment, the first heat exchange tube 23 is an S-shaped tube, a spiral tube or a spiral tube. A plurality of heat exchange fins 26 are arranged on the outer wall of the first heat exchange tube 23. Thus, the heat exchange effect between the first heat exchange tube 23 and the phase change material 22 is good. In addition, the first heat exchange tube 23 and the heat exchange fins 26 are made of metal materials such as copper materials, aluminum materials, and steel materials, and may also be made of other heat conductive materials, which are not limited herein and may be arranged according to actual requirements.

In one embodiment, a working method of a phase change thermal storage type gas water heater adopting any one of the above embodiments includes the following steps:

when the phase-change heat storage device works in a phase-change energy storage working mode, the first switch valve K1 is opened, the second switch valve K2 is opened, the host 10 works, under the power of the host 10, water in the phase-change heat storage device 20 flows in a circulating mode through the first connecting pipe 24, the first cold water inlet pipe 11, the host 10, the first hot water outlet pipe 12, the second connecting pipe 25 and the first heat exchange pipe 23, the host 10 enables the water temperature to be gradually increased to a first preset temperature, heat exchange is carried out on the hot water flowing through the first heat exchange pipe 23 and the phase-change material 22 through the first heat exchange pipe 23, and the phase-change material 22 absorbs heat and stores heat energy;

the first preset temperature is set according to actual requirements, and is not limited herein, and may be, for example, 40 ℃, 45 ℃, 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃ or 80 ℃.

When the phase-change hot water heating system works in the phase-change hot water working mode, the first switch valve K1 is closed, the second switch valve K2 is opened, the host 10 is standby and does not work, cold water in the cold water inlet manifold 30 enters the first heat exchange tube 23 through the first connecting tube 24, heat stored in the phase-change material 22 raises the temperature of water in the first heat exchange tube 23, hot water obtained through temperature rise enters the second connecting tube 25, and the hot water is discharged outwards through the second connecting tube 25 and the hot water outlet manifold 40.

In the working method of the phase-change heat storage type gas water heater, heat energy can be stored through the phase-change material 22 of the phase-change heat storage device 20, and when a user needs to use hot water, the phase-change heat storage type gas water heater operates in a phase-change hot water working mode, so that constant-temperature water outlet can be effectively realized; in addition, the heat storage capacity of the phase change heat storage device 20 is far stronger than that of the traditional water storage tank, the product size is smaller, the assembly operation is more convenient, and the maintenance cost is lower.

Further, the working method of the phase-change heat storage type gas water heater further comprises the following steps: when the water heater works in a common hot water working mode, the first switch valve K1 is opened, the second switch valve K2 is closed, and the main unit 10 works, under the power of the main unit 10, cold water enters the main unit 10 through the cold water inlet main pipe 30 and the first cold water inlet pipe 11, and the main unit 10 heats the cold water and then discharges the cold water outwards through the first hot water outlet pipe 12 and the hot water outlet main pipe 40.

In one embodiment, the step of operating in the phase-change energy storage operating mode further includes the steps of:

acquiring first water temperature information on the second connecting pipe 25, acquiring second water temperature information on the first connecting pipe 24 or the first cold water inlet pipe 11, and acquiring a first temperature deviation according to the first water temperature information and the second water temperature information;

when the first temperature deviation is smaller than the first preset value and the first water temperature information or the second water temperature information is not smaller than the second preset value, the control host 10 is switched to the standby state.

It should be noted that the first preset value is, for example, 1 ℃, 2 ℃, 3 ℃, 4 ℃ or 5 ℃ or the like, and the smaller the deviation of the first temperature is, the phase change heat storage device 20 is close to the heat absorption saturation state. In addition, the second preset value is, for example, 40 ℃, 45 ℃, 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃ or 80 ℃ or the like, and is not limited herein.

In one embodiment, the step of operating in the phase-change energy storage operating mode further includes the steps of:

acquiring first water temperature information on the second connecting pipe 25 and/or acquiring second water temperature information on the first connecting pipe 24 or the first cold water inlet pipe 11;

when the first water temperature information or the second water temperature information is not less than the second preset value, the control host 10 is switched to the standby state after working for a set time. Therefore, the phase-change material 22 of the phase-change heat storage device 20 is close to a heat absorption saturation state and cannot absorb the hot water energy of the first heat exchange tube 23, and the host 10 is correspondingly controlled to be switched to a standby state, namely, the phase-change energy storage working mode is exited in time, so that the energy is greatly saved.

The set time is, for example, 60S, 120S, 240S, or the like.

In one embodiment, the phase-change thermal storage type gas water heater comprises a water mixing pipe 50 and a flow regulating valve 60; the flow control valve 60 is electrically connected to the controller, the flow control valve 60 is disposed on the water mixing pipe 50, and the first connecting pipe 24 is further communicated with the second connecting pipe 25 through the water mixing pipe 50.

The working method of the phase-change heat storage type gas water heater further comprises the following steps: when the phase change hot water device works in the phase change hot water working mode, first water temperature information on the second connecting pipe 25 is obtained, and the opening degree of the flow regulating valve 60 is adjusted according to the first water temperature information. Specifically, when the first water temperature information is high, the water temperature of the second connection pipe 25 can be lowered by increasing the opening degree of the flow rate adjustment valve 60; when the first water temperature information is low, the opening degree of the flow rate adjustment valve 60 is decreased, so that the water temperature of the second connection pipe 25 can be increased.

In this way, a part of the cold water in the first connection pipe 24 can enter the first heat exchange pipe 23, the heat stored in the phase change material 22 heats the water in the first heat exchange pipe 23, the hot water obtained by the heating enters the second connection pipe 25, and another part of the cold water in the first connection pipe 24 enters the second connection pipe 25 through the water mixing pipe 50 to be mixed with the hot water discharged from the first heat exchange pipe 23. According to the first water temperature information, the cold water flow of the water mixing pipe 50 is adjusted through the flow adjusting valve 60, so that the hot water temperature of the second connecting pipe 25 can be adjusted to a required temperature range, the mixed hot water is delivered to the hot water outlet main pipe 40 through the second connecting pipe 25, and the hot water is discharged outwards through the hot water outlet main pipe 40 and is provided to a user.

In one embodiment, the method for operating the phase-change thermal storage type gas water heater further comprises the following steps: when the gas water heater works in the phase-change hot water working mode, first water temperature information on the second connecting pipe 25 is acquired, and if the acquired first water temperature information is not greater than a third preset value, the phase-change heat storage type gas water heater is controlled to be switched from the phase-change hot water working mode to the phase-change energy storage working mode.

It should be understood that the "cold water" in the first cold water inlet pipe 11 is not limited to feeding only cold water into the main unit 10, but also hot water can be fed into the main unit 10. Similarly, the "hot water" in the first hot water outlet pipe 12 is not limited to the host 10 only outputting the hot water, but it is of course possible that the host 10 outputs the cold water through the first hot water outlet pipe 12 when operating (especially during the on-state). Similarly, the cold water inlet manifold 30 is understood to be similar to the hot water outlet manifold 40 and will not be described in detail herein.

It should be noted that while one of the elements is described as being connected to another element and one of the elements is described as being attached to another element, it should be understood that the two elements may be connected by, for example, bolts, screws, pins, rivets, or other mounting means, or may be fixedly connected by snapping, welding, or integral molding. Wherein, the integrated molding mode can adopt the processes of extrusion, casting, press fitting, injection molding and the like.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

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 utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

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.

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 formed; can be mechanically or electrically connected; 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 present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (10)

1. The utility model provides a phase transition heat accumulation formula gas heater which characterized in that, phase transition heat accumulation formula gas heater includes:

the water heater comprises a main machine (10), wherein the main machine (10) is provided with a first cold water inlet pipe (11) and a first hot water outlet pipe (12);

the phase-change heat storage device comprises a phase-change heat storage device (20), a cold water inlet main pipe (30) and a hot water outlet main pipe (40), wherein the phase-change heat storage device (20) comprises a shell assembly (21), a phase-change material (22), a first heat exchange pipe (23), a first connecting pipe (24) and a second connecting pipe (25); the first heat exchange tube (23) is arranged inside the shell assembly (21), the phase change material (22) is filled inside the shell assembly (21) and located outside the first heat exchange tube (23), two ends of the first heat exchange tube (23) are respectively connected with the first connecting tube (24) and the second connecting tube (25), and the first connecting tube (24) and the second connecting tube (25) penetrate through the shell assembly (21) and extend out of the shell assembly (21); the first connecting pipe (24) is communicated with the first cold water inlet pipe (11), and the first connecting pipe (24) and the first cold water inlet pipe (11) are also communicated with the cold water inlet main pipe (30); the second connecting pipe (25) is communicated with the first hot water outlet pipe (12), and the second connecting pipe (25) and the first hot water outlet pipe (12) are also communicated with the hot water outlet header pipe (40);

a first switching valve (K1) and a first switching valve (K2), the first switching valve (K1) is disposed on the first cold water inlet pipe (11), and the first switching valve (K2) is disposed on the first connecting pipe (24).

2. The phase change thermal storage type gas water heater according to claim 1, wherein the main unit (10) comprises a controller, the first switch valve (K1) and the first switch valve (K2) are control switch valves, and the controller is electrically connected with the first switch valve (K1) and the first switch valve (K2), respectively.

3. The phase-change thermal storage gas water heater according to claim 2, further comprising a first temperature sensor (T1), wherein the controller is electrically connected to the first temperature sensor (T1), and the first temperature sensor (T1) is disposed on the second connecting pipe (25) for obtaining the water temperature information on the second connecting pipe (25).

4. The phase-change thermal storage gas water heater according to claim 3, further comprising a water mixing pipe (50) and a flow regulating valve (60); the flow control valve (60) is electrically connected with the controller, the flow control valve (60) is arranged on the water mixing pipe (50), and the first connecting pipe (24) is communicated with the second connecting pipe (25) through the water mixing pipe (50).

5. The phase change thermal storage type gas water heater according to claim 4, wherein a first tee pipe is arranged on the first connecting pipe (24), and the first connecting pipe (24) is connected with one end of the water mixing pipe (50) through the first tee pipe; a second three-way pipe is arranged on the second connecting pipe (25), and the second connecting pipe (25) is connected with the other end of the water mixing pipe (50) through the second three-way pipe.

6. The phase change thermal storage gas water heater according to claim 2, further comprising a second temperature sensor (T2); the controller is electrically connected with the second temperature sensor (T2); the second temperature sensor (T2) is arranged on the first cold water inlet pipe (11) and is used for acquiring water temperature information on the first cold water inlet pipe (11);

the phase-change heat storage type gas water heater also comprises a third temperature sensor (T3); the controller is electrically connected with the third temperature sensor (T3); the third temperature sensor (T3) is arranged on the first hot water outlet pipe (12) and used for acquiring the water temperature information on the first hot water outlet pipe (12).

7. The phase-change thermal storage gas water heater according to claim 2, further comprising a third on/off valve (K3); the third switch valve (K3) is arranged on the first hot water outlet pipe (12); the third switch valve (K3) is a control switch valve, and the controller is also electrically connected with the third switch valve (K3).

8. The phase-change thermal storage type gas water heater according to claim 1, wherein the first connecting pipe (24), the first cold water inlet pipe (11) and the cold water inlet main pipe (30) are connected through a first tee joint; the second connecting pipe (25), the first hot water outlet pipe (12) and the hot water outlet main pipe (40) are connected through a second three-way joint.

9. The phase change thermal storage type gas water heater according to claim 1, wherein the shell assembly (21) comprises an inner shell (211), an outer shell (212) sleeved outside the inner shell (211), and a thermal insulation material (213) filled between the inner shell (211) and the outer shell (212); the first connecting pipe (24) and the second connecting pipe (25) penetrate through the inner shell (211) and the outer shell (212) and extend out of the outer shell (212).

10. The phase change thermal storage type gas water heater according to any one of claims 1 to 9, wherein the first heat exchange pipe (23) is an S-shaped pipe, a spiral pipe or a spiral pipe; the outer wall of the first heat exchange tube (23) is provided with a plurality of heat exchange fins (26).

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