CN115031410A

CN115031410A - Hot water capacity increasing structure and method

Info

Publication number: CN115031410A
Application number: CN202210653721.7A
Authority: CN
Inventors: 梁秋华; 胡春明; 吴宇翔; 张慧宝
Original assignee: Guangdong Well Born Electric Appliances Co ltd
Current assignee: Guangdong Well Born Electric Appliances Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-10
Publication date: 2022-09-09
Also published as: CN116294197A

Abstract

The invention provides a hot water capacity increasing structure and a hot water capacity increasing method, wherein the structure comprises a cold water inlet pipe, a hot water outlet pipe, a first heating device arranged adjacent to the cold water inlet pipe and a second heating device arranged adjacent to the hot water outlet pipe; at least part of the first heating device is arranged on an output path of the cold water inlet pipe, and after cold water flows out from an output end of the cold water inlet pipe, cold water flow impacts the surface of the first heating device and exchanges heat with the first heating device; at least part of the second heating device is arranged along the length direction of the hot water outlet pipe and extends towards the input end of the hot water outlet pipe, and is used for locally heating the area near the input end of the hot water outlet pipe; the method comprises a hot water capacity increasing structure, wherein the hot water capacity increasing structure selects a working state according to the water temperature of the inner container. The heat exchange condition is improved, the internal temperature field of the water heater is more uniform, heat concentration is avoided, the energy storage effect of the inner container of the water heater is improved, and the hot water output quantity of the system is increased.

Description

Hot water capacity increasing structure and method

Technical Field

The invention relates to the technical field of electric water heaters, in particular to a hot water capacity increasing structure and a hot water capacity increasing method.

Background

Along with the improvement of the living standard of people in recent years, the demand of people on water consumption is increasing, and an electric water heater is more and more popular to users as a convenient and quick water heater. The electric water heater can be divided into a horizontal electric water heater and a vertical electric water heater according to the installation mode.

The existing horizontal electric water heater has the defects of insufficient hot water output, and particularly, when the inner container is too long, the temperature dead angle is too large, so that the energy storage of the water heater is insufficient, and the integral hot water output is influenced; especially, the general small-capacity quick-heating positive displacement water heater has overlarge low-temperature dead angle temperature zone, so that the energy storage of the whole liner is insufficient, and the bath water mixed at 40 ℃ can be obviously reduced. In order to improve the output quantity of bath water mixed at 40 ℃, a method of increasing the set temperature is generally adopted, but for frequent heating caused by small-volume water, the temperature at the top of the water heater can accumulate heat, the temperature of hot water exceeds the standard, the misoperation of a thermal circuit breaker can be caused, and the safe use of the whole water heater is influenced.

Disclosure of Invention

The invention aims to at least solve one of the technical problems that the prior horizontal electric water heater has insufficient hot water output and the safe use of the water heater is influenced by the prior mode of improving the output quantity of mixed warm water.

To this end, the first aspect of the present invention provides a hot water compatibilization structure.

In a second aspect, the invention provides a hot water compatibilization method.

The invention provides a hot water capacity-increasing structure, which comprises a cold water inlet pipe and a hot water outlet pipe, and also comprises: the first heating device is arranged adjacent to the cold water inlet pipe, and the second heating device is arranged adjacent to the hot water outlet pipe;

at least part of the first heating device is arranged on an output path of the cold water inlet pipe, and after cold water flows out from an output end of the cold water inlet pipe, cold water flow impacts the surface of the first heating device and exchanges heat with the first heating device;

at least part of the second heating device is arranged along the length direction of the hot water outlet pipe and extends towards the input end of the hot water outlet pipe, and is used for locally heating the area near the input end of the hot water outlet pipe.

According to the hot water capacity-increasing structure provided by the invention, the cold water inlet pipe and the hot water outlet pipe are respectively arranged on two sides of the inner container, the cold water inlet pipe is used for conveying external cold water into the inner container of the water heater, and the hot water outlet pipe is used for outputting hot water in the inner container of the water heater to the outside or the water mixing valve; the first heating device and the second heating device are respectively arranged adjacent to the cold water inlet pipe and the hot water outlet pipe, and part of the first heating devices are arranged on an output path of the cold water inlet pipe, namely part of the first heating devices are arranged near the output end of the cold water inlet pipe so as to form a barrier to cold water output by the cold water inlet pipe and make the entering cold water and the surface of the first heating device exchange heat forcibly; the hot water gets into the hot water outlet pipe through the input of hot water outlet pipe in the inner bag, and partial second heating device arranges along hot water outlet pipe length direction, in order to realize heating the rivers in the hot water outlet pipe, and reduce the calorific loss in the hot water outlet pipe, promote the leaving water temperature, the second heating device extends towards the input direction of hot water outlet pipe, in order to realize carrying out the local heating to near hot water outlet pipe input region, improve the heat energy availability factor, increase the output quantity of higher temperature hot water.

According to the hot water compatibilization structure in the technical scheme of the invention, the hot water compatibilization structure can also have the following additional technical characteristics:

in the above technical scheme, the first heating device includes a first electric heating tube group, the first electric heating tube group is bent to form a first heat exchange space, and the output end of the cold water inlet tube is arranged in the first heat exchange space.

In the technical scheme, a half-surrounding structure is formed by bending a first electric heating pipe group, so that a first heat exchange space is formed inside the half-surrounding structure, and a full-surrounding structure can also be formed by coiling the first electric heating pipe group around a cold water inlet pipe, so that a first heat exchange space is formed inside the full-surrounding structure; the cold water inlet pipe is clamped in the first heat exchange space, the surface of the pipe body of the first electric heating pipe group forms part of the wall surface of the first heat exchange space, and cold water impacts the wall surface of the first heat exchange space to finish forced heat exchange.

In the technical scheme, the first electric heating pipe group comprises a first heating pipe and/or a second heating pipe, the first heating pipe is close to the output end of the cold water inlet pipe, and at least part of the second heating pipe extends in the direction far away from the output end of the cold water inlet pipe and the height of the second heating pipe at least exceeds half of the height of the inner container of the water heater.

In the technical scheme, the first electric heating pipe group can be only provided with the first heating pipe or the second heating pipe, and also can be simultaneously provided with the first heating pipe and the second heating pipe, the first heating pipe is used for rapidly exchanging heat with cold water output by the output end of the cold water inlet pipe, and the second heating pipe is used for continuously exchanging heat with cold water inlet and heating water on the upper part of the inner container of the water heater.

In the above technical scheme, the second heating device includes a second electric heating tube group, the second electric heating tube group is bent to form a second heat exchange space, and the hot water outlet pipe passes through the second heat exchange space.

In the technical scheme, a half-surrounding structure is formed by bending a second electric heating tube group, so that a second heat exchange space is formed inside the half-surrounding structure, and a full-surrounding structure can also be formed by coiling the second electric heating tube group around a hot water outlet pipe, so that a second heat exchange space is formed inside the full-surrounding structure; most of the pipes of the hot water outlet pipe are clamped in the second heat exchange space, the temperature of a local temperature area on the outer surface of the hot water outlet pipe is relatively high, the heat loss is effectively reduced, and the input end of the hot water outlet pipe extends out of the second heat exchange space.

In the above technical scheme, the second electric heating pipe group includes a third heating pipe and/or a fourth heating pipe, the third heating pipe is far away from the input end of the hot water outlet pipe, and the fourth heating pipe extends in the direction close to the input end of the hot water outlet pipe and has a height at least exceeding half of the height of the water heater inner container.

In this technical solution, the second electric heating tube group may be provided with only a third heating tube or a fourth heating tube, or may be provided with both the third heating tube and the fourth heating tube, where the third heating tube is used to heat a surrounding area of the hot water outlet tube near the output end portion, and the fourth heating tube is used to heat a surrounding area of the hot water outlet tube near the input end portion and a surrounding area of most tube bodies.

In the above technical solution, the first electric heating tube group and the second electric heating tube group have the same structure.

In the technical scheme, the first electric heating pipe group and the second electric heating pipe group adopt electric heating pipes with the same shape and size and are symmetrically arranged so as to reduce the types of the electric heating pipes; the first heating pipe and the third heating pipe are downwards extended to the bottom of the inner container to heat water at the bottom of the inner container, and the second heating pipe and the fourth heating pipe are downwards extended to the bottom of the inner container and are respectively upwards bent in the first heating pipe and the third heating pipe; the upward bending part of the fourth heating pipe is close to the hot water outlet pipe and extends towards the input end of the hot water outlet pipe; the cross section of a first heat exchange space formed by bending the first heating pipe and the second heating pipe is a trapezoidal cross section, and the cross section of a second heat exchange space formed by bending the third heating pipe and the fourth heating pipe is also a trapezoidal cross section.

In the above technical scheme, the heating device further comprises a controller, and the controller is respectively connected with the first heating pipe, the second heating pipe, the third heating pipe and the fourth heating pipe.

In the technical scheme, the first heating pipe, the second heating pipe, the third heating pipe and the fourth heating pipe are respectively controlled by the controller to be heated by adopting different combinations, and it should be noted that no matter how the combinations are combined, the output power under the current combination is the rated power of the water heater.

In any of the above technical solutions, the device further comprises a detection device arranged on the first heating device, the detection device is connected with the controller, the detection device comprises a first detection tube and a second detection tube, the first detection tube extends towards the direction close to the output end of the cold water inlet tube, and the end of the first detection tube is provided with a temperature sensor for testing the temperature of the water inlet position of the liner; the second detecting tube is arranged on one side, away from the output end of the cold water inlet tube, of the inner container, and a temperature sensor used for testing the temperature of the inner container is arranged at the end of the second detecting tube.

In the technical scheme, the temperature sensor of the first detection pipe is arranged near the cold water inlet pipe, so that timely work is ensured when water is sensed, and a thermal circuit breaker probe is arranged on the pipe; when the cold water inlet pipe is positioned at the lower end of the inner container, the whole second detection pipe is positioned above the central line of the inner container and is used for detecting the water temperature at the upper part of the inner container;

the detection device is connected with the controller, the controller is provided with a display for displaying the temperature, and the display displays the detected temperature of the second detection tube, so that the displayed temperature is prevented from dropping rapidly as soon as cold water enters the inner container;

another detecting device can be arranged at the second heating device.

In any of the above technical solutions, the output end of the cold water inlet pipe is close to one end of the inner container, and the input end of the hot water outlet pipe is close to the other end of the inner container; the output of cold water inlet tube includes a plurality of scattered water holes of arranging along cold water inlet tube circumference, the input of hot water outlet pipe includes the water inlet.

In the technical scheme, the output end of the cold water inlet pipe is close to the lower end of the inner container, the output end of the cold water inlet pipe can be provided with a water outlet or water scattering holes and the like, and preferably, cold water flows to any direction around the cold water inlet pipe through the water scattering holes arranged along the circumferential direction of the cold water inlet pipe, so that the contact heat exchange efficiency is improved; the input end of the hot water outlet pipe is close to the upper end inside the inner container, and the input end of the hot water outlet pipe can be set into a water inlet or a plurality of water inlet holes.

The invention also provides a hot water capacity increasing method, which adopts the hot water capacity increasing structure of any technical scheme, and the hot water capacity increasing structure comprises the following steps:

the first working state: starting the first heating pipe and the fourth heating pipe for heating, and enabling the rest heating pipes not to work;

a second working state: starting the second heating pipe and the third heating pipe for heating, and enabling the rest heating pipes not to work;

a third working state: starting the first heating pipe and the third heating pipe for heating, and enabling the rest heating pipes not to work;

a fourth operating state: starting the second heating pipe and the fourth heating pipe for heating, and enabling the rest heating pipes not to work;

the hot water capacity increasing structure selects a working state according to the water temperature of the inner container.

According to the hot water capacity increasing method provided by the invention, the working state is switched according to the change of the water temperature in the inner container, when the water temperature is lower than a certain value, the hot water capacity increasing structure adopts a first working state, the first heating pipe increases the inlet temperature of cold water, and the fourth heating pipe rapidly heats the local temperature of the water inlet of the hot water outlet pipe; when the temperature reaches a higher temperature value, the hot water capacity increasing structure adopts a second working state, the second heating pipe and the third heating pipe balance the temperature field of the whole water heater, the temperature gradient of the temperature field near the heating pipes is reduced, and the balance of the high-temperature area of the inner container of the whole water heater is balanced.

When the water heater is in a use state, the hot water capacity increasing structure is heated in the second working state until the temperature is reduced to a certain range, the hot water capacity increasing structure is switched to the first working state to heat, the local water temperature of the water inlet of the hot water outlet pipe is rapidly heated, and the hot water output at higher temperature is improved as far as possible.

In any of the above technical solutions, the first heating pipe, the second heating pipe, the third heating pipe and the fourth heating pipe have the same power;

when the water temperature of the inner container is in a first temperature range, the hot water capacity increasing structure is in a fourth working state; when the water temperature of the inner container is in a second temperature range, the hot water capacity increasing structure is in a first working state; when the water temperature of the inner container is in a third temperature range, the hot water capacity increasing structure is in a second working state; when the water temperature of the inner container is in a fourth temperature range, the hot water capacity increasing structure is in a third working state;

the water temperature in the first temperature interval is less than or equal to the water temperature in the second temperature interval; the water temperature in the second temperature interval is less than or equal to the water temperature in a third temperature interval; and the water temperature in the third temperature interval is less than or equal to the water temperature in the fourth temperature interval.

In the technical scheme, the first temperature interval can be 0-45 ℃, the second temperature interval can be 45-55 ℃, the third temperature interval can be 55-65 ℃, the fourth temperature interval is 65 ℃ or above, the range of each temperature interval can be flexibly adjusted according to actual conditions, wherein the lowest limit value of the fourth temperature interval is the temperature set by a user of the water heater; heating according to rated power in the whole heating process is required to be guaranteed, only one heating pipe works in each of the first electric heating pipe group and the second electric heating pipe group, and the rated power of the water heater is the sum of the powers of any two heating pipes;

when the water temperature of the inner container is in a first temperature range, namely 0-45 ℃, the hot water capacity increasing structure is in a fourth working state, and the second heating pipe and the fourth heating pipe are preferentially used for heating, so that the aim of quickly heating the local water at the upper part of the inner container is fulfilled, and the water temperature near the input end of the hot water outlet pipe is increased as soon as possible;

when the inner bag temperature is in the fourth temperature interval and is more than 65 degrees centigrade, hot water increase capacity structure is in third operating condition, preferentially uses first heating pipe and third heating pipe to heat, and the purpose is concentrated the heat of heating pipe in the inner bag bottom, and the heat transfer is intake with cold water, avoids the production of super high temperature water, avoids the high overheat protection that arouses of temperature.

In any of the above technical solutions, the power of the first heating pipe is the same as that of the third heating pipe, the power of the second heating pipe is the same as that of the fourth heating pipe, and the power of the first heating pipe is greater than or less than that of the second heating pipe; the sum of the power of the first heating pipe and the power of the second heating pipe is the rated power of the water heater;

when the water temperature of the inner container is in a first temperature range, the hot water capacity increasing structure is in a first working state; when the water temperature of the inner container is in a second temperature range, the hot water capacity increasing structure is in a second working state; when the water temperature of the inner container is in a third temperature range, the hot water capacity increasing structure adopts the first working state and the second working state to heat alternately; when the water temperature of the inner container is in a fourth temperature interval, the hot water capacity increasing structure is in a second working state;

In the technical scheme, the power of the first heating pipe and the third heating pipe can be 3kW, the power of the second heating pipe and the fourth heating pipe can be 2.2kW, and the rated power of the water heater is 5.2 kW.

Under the frequent low capacity water condition of extreme using, after first detecting tube detected cold water and got into the water heater, heating device began working, but a small amount of water after the water was closed, frequent water intake caused heating device frequently to start, it is very little to go out the hot water yield, caused the heat to accumulate at the inner bag top, caused water heater inner bag top high temperature easily, produced out water overheated or hot circuit breaker malfunction easily. In the scheme, if the temperature of the upper part of the inner container monitored by the second detection tube is too high, such as over 85 ℃, the control system automatically limits the reheating temperature to a lower temperature, such as 75 ℃ or 70 ℃, so as to avoid the temperature of the top of the inner container from being too high.

In summary, due to the adoption of the technical characteristics, the invention has the beneficial effects that:

when the temperature is lower, carry out local rapid heating near hot water outlet pipe water inlet, when the temperature is very high, focus on the regional heating near cold water inlet tube output, promote water heater hot water output speed, reduce the temperature gradient of near heating pipe temperature field, improve the heat transfer condition, make the inside temperature field of water heater more even simultaneously, promote the hot water output quantity of water heater inner bag energy storage effect increase system, avoid the heat to concentrate, the great noise that the too high temperature gradient produced when can solving the heating, promote entire system's heating performance.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a front cross-sectional view of a hot water compatibilized structure according to one embodiment of the present invention;

FIG. 2 is a side cross-sectional view of the cold water inlet tube location of a hot water containment structure in accordance with one embodiment of the present invention;

FIG. 3 is a side sectional view of the hot water outlet pipe position of a hot water increasing capacity structure according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a first heating means in a hot water compatibilization structure according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:

1. a cold water inlet pipe; 2. a hot water outlet pipe; 3. a first heating device; 4. a second heating device; 5. an inner container; 6. a second probe tube; 7. a first probe tube;

11. water spray holes;

21. a water inlet;

31. a first electric heating tube group; 32. a first heat exchange space;

41. a second electric heating tube group; 42. a second heat exchange space;

311. a first heating pipe; 312. a second heating pipe;

411. a third heating pipe; 412. and a fourth heating pipe.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention, taken in conjunction with the accompanying drawings and detailed description, is set forth below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.

A hot water compatibilization structure and a hot water compatibilization method according to some embodiments of the present invention are described below with reference to fig. 1 to 4.

Some embodiments of the present application provide a hot water compatibilization structure.

As shown in fig. 1 to 4, a first embodiment of the present invention provides a hot water capacity increasing structure, which includes a cold water inlet pipe 1 and a hot water outlet pipe 2, and further includes: a first heating device 3 arranged adjacent to the cold water inlet pipe 1 and a second heating device 4 arranged adjacent to the hot water outlet pipe 2;

at least part of the first heating device 3 is arranged on an output path of the cold water inlet pipe 1, and after cold water flows out from an output end of the cold water inlet pipe 1, cold water flow impacts the surface of the first heating device 3 and exchanges heat with the first heating device 3;

at least part of the second heating means 4 is arranged along the length of the hot water outlet pipe 2 and extends towards the input end of the hot water outlet pipe 2 for locally heating the area near the input end of the hot water outlet pipe 2.

In the hot water volume-increasing structure provided by the embodiment, the cold water inlet pipe 1 and the hot water outlet pipe 2 are respectively arranged at two sides inside the liner 5, the cold water inlet pipe 1 is used for conveying external cold water into the liner 5 of the water heater, and the hot water outlet pipe 2 is used for outputting hot water in the liner 5 of the water heater to the outside or to the water mixing valve; the first heating device 3 and the second heating device 4 are respectively arranged adjacent to the cold water inlet pipe 1 and the hot water outlet pipe 2, and part of the first heating device 3 is arranged on an output path of the cold water inlet pipe 1, namely, part of the first heating device 3 is arranged near the output end of the cold water inlet pipe 1 so as to form a barrier to cold water output by the cold water inlet pipe 1 and make the entering cold water and the surface of the first heating device 3 exchange heat forcibly; hot water gets into hot water outlet pipe 2 through hot water outlet pipe 2's input in the inner bag 5, partial second heating device 4 arranges along 2 length direction of hot water outlet pipe, in order to realize heating the rivers in hot water outlet pipe 2, and reduce the calorific loss in hot water outlet pipe 2, promote the leaving water temperature, second heating device 4 extends towards the input direction of hot water outlet pipe 2, in order to realize carrying out the local heating to the near region of hot water outlet pipe 2 input, improve heat energy availability factor, increase the output quantity of higher temperature hot water.

The second embodiment of the present invention provides a hot water capacity increasing structure, and based on the first embodiment, as shown in fig. 1 to 4, the first heating device 3 includes a first electric heating tube group 31, the first electric heating tube group 31 is bent to form a first heat exchanging space 32, and the output end of the cold water inlet tube 1 is disposed in the first heat exchanging space 32.

In this embodiment, a half-surrounding structure is formed by bending the first electric heating tube group 31, so that the inside of the half-surrounding structure is the first heat exchange space 32, or the first electric heating tube group 31 is wound around the cold water inlet pipe 1 to form a full-surrounding structure, so that the inside of the full-surrounding structure is the first heat exchange space 32; the cold water inlet pipe 1 is clamped in the first heat exchange space 32, the surface of the pipe body of the first electric heating pipe group 31 forms part of the wall surface of the first heat exchange space 32, and cold water impacts the wall surface of the first heat exchange space 32 to finish forced heat exchange.

A third embodiment of the present invention provides a hot water volume-increasing structure, and based on any of the above embodiments, as shown in fig. 1 to 4, the first heating pipe set 31 includes a first heating pipe 311 and/or a second heating pipe 312, the first heating pipe 311 is close to the output end of the cold water inlet pipe 1, and at least a portion of the second heating pipe 312 extends in a direction away from the output end of the cold water inlet pipe 1 and has a height at least exceeding half of the height of the water heater liner 5.

In this embodiment, the first electric heating tube set 31 may be provided with only the first heating tube 311 or the second heating tube 312, or may be provided with both the first heating tube 311 and the second heating tube 312, the first heating tube 311 is used for rapidly exchanging heat with cold water output from the output end of the cold water inlet tube 1, and the second heating tube 312 is used for continuously exchanging heat with cold water inlet and heating water at the upper portion of the water heater liner 5.

A fourth embodiment of the present invention provides a hot water volume increasing structure, and based on any of the above embodiments, as shown in fig. 1 to 4, the second heating device 4 includes a second electric heating tube group 41, the second electric heating tube group 41 is bent to form a second heat exchanging space 42, and the hot water outlet pipe 2 passes through the second heat exchanging space 42.

In this embodiment, a half-surrounding structure is formed by bending the second electric heating tube group 41, so that the inside of the half-surrounding structure is the second heat exchanging space 42, or the second electric heating tube group 41 is wound around the hot water outlet pipe 2 to form a full-surrounding structure, so that the inside of the full-surrounding structure is the second heat exchanging space 42; most of the pipe length of the hot water outlet pipe 2 is clamped in the second heat exchange space 42, the temperature of the local temperature area on the outer surface of the hot water outlet pipe 2 is relatively high, the heat loss is effectively reduced, and the input end of the hot water outlet pipe 2 extends out of the second heat exchange space 42.

In a fifth embodiment of the present invention, a hot water volume-increasing structure is provided, and on the basis of any one of the above embodiments, as shown in fig. 1 to fig. 4, the second electric heating tube group 41 includes a third heating tube 411 and/or a fourth heating tube 412, the third heating tube 411 is far away from the input end of the hot water outlet pipe 2, and the fourth heating tube 412 extends in a direction close to the input end of the hot water outlet pipe 2 and has a height at least exceeding half of the height of the water heater inner container 5.

In this embodiment, the second electric heating pipe group 41 may be provided with only the third heating pipe 411 or the fourth heating pipe 412, or with both the third heating pipe 411 and the fourth heating pipe 412, the third heating pipe 411 is used for heating the area around the hot water outlet pipe 2 near the output end portion, and the fourth heating pipe 412 is used for heating the area around the hot water outlet pipe 2 near the input end portion and most of the pipe body.

A sixth embodiment of the present invention provides a hot water capacity increasing structure, and based on any of the above embodiments, as shown in fig. 1 to 4, the first electric heating tube group 31 and the second electric heating tube group 41 have the same structure.

In this embodiment, the first electric heating tube group 31 and the second electric heating tube group 41 use electric heating tubes with the same shape and size, and are symmetrically arranged to reduce the types of the electric heating tubes; the first heating pipe 311 and the third heating pipe 411 are downward extended to the bottom of the inner container 5 to heat water at the bottom of the inner container 5, and the second heating pipe 312 and the fourth heating pipe 412 are downward extended to the bottom of the inner container 5 and are respectively bent upward inside the first heating pipe 311 and the third heating pipe 411; the upward bending part of the fourth heating pipe 412 is close to the hot water outlet pipe 2 and extends towards the input end of the hot water outlet pipe 2; the cross section of the first heat exchanging space 32 formed by bending the first heating pipe 311 and the second heating pipe 312 is a trapezoidal cross section, and the cross section of the second heat exchanging space 42 formed by bending the third heating pipe 411 and the fourth heating pipe 412 is also a trapezoidal cross section.

A seventh embodiment of the present invention proposes a hot water capacity increasing structure, and on the basis of any one of the above embodiments, as shown in fig. 1 to 4, the present invention further includes a controller, and the controller is respectively connected to the first heating pipe 311, the second heating pipe 312, the third heating pipe 411 and the fourth heating pipe 412.

In this embodiment, the first heating pipe 311, the second heating pipe 312, the third heating pipe 411 and the fourth heating pipe 412 are controlled by the controller to be heated in different combinations, and it should be noted that, no matter how the combinations are, the output power under the current combination should be the rated power of the water heater.

An eighth embodiment of the present invention provides a hot water capacity increasing structure, and based on any of the above embodiments, as shown in fig. 1 to 4, the first heating device 3 and the second heating device 4 are symmetrically disposed on two sides of the inner container 5.

In this embodiment, a magnesium rod is arranged between the first heating device 3 and the second heating device 4, and the magnesium rod is fixed in the middle of the inner container 5.

A ninth embodiment of the present invention provides a hot water capacity increasing structure, and on the basis of any one of the above embodiments, as shown in fig. 1 to 4, the present invention further includes a detecting device disposed on the first heating device 3, the detecting device is connected to the controller, the detecting device includes a first detecting tube 7 and a second detecting tube 6, the first detecting tube 7 extends toward the direction close to the output end of the cold water inlet tube 1, and the end of the first detecting tube 7 is provided with a temperature sensor for testing the temperature of the water inlet position of the inner container 5; the second detecting tube 6 is arranged on one side, far away from the output end of the cold water inlet tube 1, of the inner container 5, and a temperature sensor used for testing the temperature of the inner container 5 is arranged at the end of the second detecting tube 6.

In this embodiment, the temperature sensor of the first detection tube 7 is arranged near the cold water inlet tube 1 to ensure timely operation when water inflow is sensed, and a thermal breaker probe is arranged on the tube; when the cold water inlet pipe 1 is positioned at the lower end of the inner container 5, the whole second detection pipe 6 is positioned above the central line of the inner container 5 and is used for detecting the water temperature at the upper part of the inner container 5;

the detection device is connected with the controller, the controller is provided with a display for displaying the temperature, and the display displays the detected temperature of the second detection tube 6, so that the display temperature is prevented from dropping sharply as soon as the inner container 5 enters cold water;

a further detection device can also be provided at the second heating device 4.

A tenth embodiment of the present invention provides a hot water capacity increasing structure, and on the basis of any of the above embodiments, as shown in fig. 1 to 4, an output end of the cold water inlet pipe 1 is close to one end of the inner container 5, and an input end of the hot water outlet pipe 2 is close to the other end of the inner container 5; the output of cold water inlet pipe 1 includes a plurality of scattered water holes 11 of arranging along cold water inlet pipe 1 circumference, the input of hot water outlet pipe 2 includes water inlet 21.

In this embodiment, the output end of the cold water inlet pipe 1 is close to the lower end inside the inner container 5, the output end of the cold water inlet pipe 1 may be provided with a water outlet or water scattering holes 11, and the like, preferably, cold water flows to any direction around the cold water inlet pipe 1 through the water scattering holes 11 arranged along the circumferential direction of the cold water inlet pipe 1, so as to improve the contact heat exchange efficiency; the input end of the hot water outlet pipe 2 is close to the upper end of the inner container 5, and the input end of the hot water outlet pipe 2 can be set to be a water inlet 21 or a plurality of water inlet holes.

Some embodiments of the present invention provide a hot water compatibilization method.

An eleventh embodiment of the present invention provides a hot water volume increasing method, and on the basis of any one of the above embodiments, as shown in fig. 1 to 4, a hot water volume increasing structure according to any one of the above embodiments is adopted, where the hot water volume increasing structure includes:

a first working state: starting the first heating pipe 311 and the fourth heating pipe 412 for heating, and stopping the other heating pipes;

the second working state: the second heating pipe 312 and the third heating pipe 411 are started to heat, and the rest heating pipes do not work;

the third working state: the first heating pipe 311 and the third heating pipe 411 are started to heat, and the rest heating pipes do not work;

the fourth working state: the second heating pipe 312 and the fourth heating pipe 412 are started to heat, and the rest of the heating pipes do not work;

the hot water capacity increasing structure selects a working state according to the water temperature of the inner container 5.

According to the hot water capacity increasing method provided by the embodiment, the working states are switched according to the change of the temperature of the water in the inner container 5, when the temperature of the water is lower than a certain value, the hot water capacity increasing structure adopts a first working state, the first heating pipe 311 increases the temperature of the inlet of cold water, and the fourth heating pipe 412 quickly heats the local temperature of the water inlet 21 of the hot water outlet pipe 2; when the temperature reaches a higher temperature value, the hot water capacity increasing structure adopts a second working state, the second heating pipe 312 and the third heating pipe 411 balance the temperature field of the whole water heater, the temperature gradient of the temperature field near the heating pipes is reduced, and the balance of the high-temperature area of the inner container 5 of the whole water heater is balanced.

When the water heater is in a use state, the hot water capacity increasing structure is heated in the second working state until the temperature is reduced to a certain range, the hot water capacity increasing structure is switched to the first working state to heat, the local water temperature of the water inlet 21 of the hot water outlet pipe 2 is rapidly heated, and the hot water output at higher temperature is improved as far as possible.

A twelfth embodiment of the present invention proposes a hot water compatibilization method, and based on any of the above embodiments, as shown in fig. 1 to 4, the power of the first heating pipe 311, the second heating pipe 312, the third heating pipe 411 and the fourth heating pipe 412 is the same;

when the water temperature of the inner container 5 is in a first temperature range, the hot water capacity increasing structure is in a fourth working state; when the water temperature of the inner container 5 is in a second temperature range, the hot water capacity increasing structure is in a first working state; when the water temperature of the inner container 5 is in a third temperature range, the hot water capacity increasing structure is in a second working state; when the water temperature of the inner container 5 is in a fourth temperature range, the hot water capacity increasing structure is in a third working state;

In this embodiment, the first temperature range may be 0-45 degrees celsius, the second temperature range may be 45-55 degrees celsius, the third temperature range may be 55-65 degrees celsius, the fourth temperature range is 65 degrees celsius and above, and the range of each temperature range may also be flexibly adjusted according to actual situations, wherein the lowest limit value of the fourth temperature range is the temperature set by the user of the water heater; heating is carried out according to rated power in the whole heating process, only one heating pipe works in each of the first electric heating pipe group 31 and the second electric heating pipe group 41, and the rated power of the water heater is the sum of the power of any two heating pipes;

when the water temperature of the inner container 5 is in the first temperature range, namely 0-45 ℃, the hot water capacity-increasing structure is in the fourth working state, and the second heating pipe 312 and the fourth heating pipe 412 are preferentially used for heating, so that the local water at the upper part of the inner container 5 is rapidly heated, and the water temperature near the input end of the hot water outlet pipe 2 is rapidly increased;

when the water temperature of the inner container 5 is in the fourth temperature interval, namely more than 65 ℃, the hot water capacity increasing structure is in the third working state, the first heating pipe 311 and the third heating pipe 411 are preferentially used for heating, the purpose is to concentrate the heat of the heating pipes at the bottom of the inner container 5, and the heat exchange with the cold water is realized, so that the generation of ultrahigh temperature water is avoided, and the overheating protection caused by overhigh water temperature is avoided.

A thirteenth embodiment of the present invention proposes a hot water compatibilization method, and based on any of the above embodiments, as shown in fig. 1 to 4, the power of the first heating pipe 311 and the third heating pipe 411 is the same, the power of the second heating pipe 312 and the fourth heating pipe 412 is the same, and the power of the first heating pipe 311 is greater than or less than the power of the second heating pipe 312; and the sum of the power of the first heating pipe 311 and the second heating pipe 312 is the rated power of the water heater;

when the water temperature of the inner container 5 is in a first temperature range, the hot water capacity increasing structure is in a first working state; when the water temperature of the inner container 5 is in a second temperature range, the hot water capacity increasing structure is in a second working state; when the water temperature of the inner container 5 is in a third temperature range, the hot water capacity increasing structure is heated alternately in a first working state and a second working state; when the water temperature of the inner container 5 is in a fourth temperature interval, the hot water capacity increasing structure is in a second working state;

In this embodiment, the power of the first heating pipe 311 and the third heating pipe 411 may be 3kW, and the power of the second heating pipe 312 and the fourth heating pipe 412 may be 2.2kW, in which case the rated power of the water heater is 5.2 kW.

Under the condition of extremely-used frequent small-capacity water use, after the first detection tube 7 detects that cold water enters the water heater, the heating device starts to work, but after a small amount of water is used, the water is turned off, frequent water inlet causes frequent starting of the heating device, the hot water outlet amount is small, heat is accumulated on the top of the inner container 5, the temperature of the top of the inner container 5 of the water heater is easily overhigh, and the water outlet overheating or the misoperation of a thermal breaker is easily caused. In the scheme, if the temperature of the upper part of the inner container 5 monitored by the second detection tube 6 is too high, such as over 85 ℃, the control system automatically and forcibly limits the reheating temperature to a lower temperature, such as 75 ℃ or 70 ℃, so as to avoid the temperature of the top of the inner container 5 from being too high.

In this specification, the schematic representations of the terms used above do not necessarily 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.

Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hot water capacity increasing structure comprises a cold water inlet pipe (1) and a hot water outlet pipe (2), and is characterized by comprising: a first heating device (3) arranged adjacent to the cold water inlet pipe (1) and a second heating device (4) arranged adjacent to the hot water outlet pipe (2);

at least part of the first heating device (3) is arranged on an output path of the cold water inlet pipe (1), and cold water flow impacts the surface of the first heating device (3) and exchanges heat with the first heating device (3) after flowing out of the output end of the cold water inlet pipe (1);

at least part of the second heating device (4) is arranged along the length direction of the hot water outlet pipe (2) and extends towards the input end of the hot water outlet pipe (2) for locally heating the area near the input end of the hot water outlet pipe (2).

2. A hot water compatibilization structure according to claim 1, wherein the first heating means (3) comprises a first electric heating pipe group (31), the first electric heating pipe group (31) is bent to form a first heat exchange space (32), and the output end of the cold water inlet pipe (1) is arranged in the first heat exchange space (32).

3. A hot water volume increasing structure according to claim 2, characterized in that the first heating pipe group (31) comprises a first heating pipe (311) and/or a second heating pipe (312), the first heating pipe (311) is close to the output end of the cold water inlet pipe (1), and at least part of the second heating pipe (312) extends in a direction away from the output end of the cold water inlet pipe (1) and has a height at least exceeding half of the height of the water heater inner container (5).

4. A hot water compatibilising structure according to claim 3, characterized in that the second heating means (4) comprises a second electric heating tube set (41), the second electric heating tube set (41) is bent to form a second heat exchanging space (42), and the hot water outlet pipe (2) passes through the second heat exchanging space (42).

5. A hot water volume increasing structure according to claim 4, characterized in that the second electric heating pipe group (41) comprises a third heating pipe (411) and/or a fourth heating pipe (412), the third heating pipe (411) is far away from the input end of the hot water outlet pipe (2), and the fourth heating pipe (412) extends along the direction close to the input end of the hot water outlet pipe (2) and has a height at least exceeding half of the height of the water heater liner (5).

6. A hot water compatibilization structure according to claim 5, further comprising a controller connected to the first heating pipe (311), the second heating pipe (312), the third heating pipe (411) and the fourth heating pipe (412), respectively.

7. A hot water volume-increasing structure according to any one of claims 1 to 6, further comprising a detecting device arranged on the first heating device (3), wherein the detecting device is connected with the controller, the detecting device comprises a first detecting tube (7) and a second detecting tube (6), the first detecting tube (7) extends towards the direction close to the output end of the cold water inlet tube (1), and the end of the first detecting tube (7) is provided with a temperature sensor for testing the temperature of the water inlet position of the inner container (5); the second detecting tube (6) is arranged on one side, away from the output end of the cold water inlet tube (1), of the inner container (5), and a temperature sensor used for testing the temperature of the inner container (5) is arranged at the end of the second detecting tube (6).

8. A hot water compatibilization method characterized by employing the hot water compatibilization structure according to any one of claims 5 to 7, the hot water compatibilization structure comprising:

a first working state: starting the first heating pipe (311) and the fourth heating pipe (412) for heating, and enabling the rest heating pipes not to work;

the second working state: starting the second heating pipe (312) and the third heating pipe (411) for heating, and stopping the rest heating pipes;

the third working state: starting the first heating pipe (311) and the third heating pipe (411) for heating, and enabling the rest heating pipes not to work;

the fourth working state: starting the second heating pipe (312) and the fourth heating pipe (412) for heating, and stopping the rest heating pipes;

the hot water capacity increasing structure selects a working state according to the water temperature of the inner container (5).

9. A hot water compatibilization method according to claim 8, wherein the power of the first heating pipe (311), the second heating pipe (312), the third heating pipe (411) and the fourth heating pipe (412) is the same;

when the water temperature of the inner container (5) is in a first temperature range, the hot water capacity increasing structure is in a fourth working state; when the water temperature of the inner container (5) is in a second temperature range, the hot water capacity increasing structure is in a first working state; when the water temperature of the inner container (5) is in a third temperature range, the hot water capacity increasing structure is in a second working state; when the water temperature of the inner container (5) is in a fourth temperature range, the hot water capacity increasing structure is in a third working state;

10. A hot water compatibilization method according to claim 8, wherein the first heating pipe (311) and the third heating pipe (411) have the same power, the second heating pipe (312) and the fourth heating pipe (412) have the same power, and the power of the first heating pipe (311) is greater or less than the power of the second heating pipe (312); and the sum of the power of the first heating pipe (311) and the second heating pipe (312) is the rated power of the water heater;

when the water temperature of the inner container (5) is in a first temperature range, the hot water capacity increasing structure is in a first working state; when the water temperature of the inner container (5) is in a second temperature range, the hot water capacity increasing structure is in a second working state; when the water temperature of the inner container (5) is in a third temperature range, the hot water capacity increasing structure adopts the first working state and the second working state to heat alternately; when the water temperature of the inner container (5) is in a fourth temperature interval, the hot water capacity increasing structure is in a second working state;