CN220728520U

CN220728520U - Hot water system and water heating device

Info

Publication number: CN220728520U
Application number: CN202321511066.8U
Authority: CN
Inventors: 李水清; 姚振虎; 蔡茂虎
Original assignee: AO Smith China Water Heater Co Ltd
Current assignee: AO Smith China Water Heater Co Ltd
Priority date: 2023-06-13
Filing date: 2023-06-13
Publication date: 2024-04-05
Anticipated expiration: 2033-06-13

Abstract

The application provides a hot water system and water heating device, hot water system includes: a first water heating device and a second water heating device; the first water heating device comprises a first inner container, and a phase change material is arranged in the first inner container; the first liner is provided with a heating component for heating the phase change material; a first heat exchanger is arranged in the first liner, and water flowing through the first heat exchanger can exchange heat with the phase change material; the second water heating device can preheat the water input into the first water heating device, and the preheated water at least partially flows into the first heat exchanger or the preheated water preheated in a preset state at least partially flows into the first heat exchanger; the first water heating device heats the preheated water and then transmits the preheated water to a water consumption point. By preheating the water input into the first water heating device, the heating time required by outputting hot water is reduced, and the use requirements of a user on large hot water consumption and large-flow water are met.

Description

Hot water system and water heating device

Technical Field

The application relates to the technical field of water heating equipment, in particular to a hot water system and a water heating device.

Background

This section is intended to provide a background or context to the embodiments of the application recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

For large-area houses such as flat floors or villas, users often set up a plurality of toilets or a large number of water-using apparatuses in the houses, resulting in an increasing demand of hot water by the users. At present, a water heating device arranged in a user house is usually a water heating device such as an independent gas water heater or an electric water heater, wherein water resistance exists in the process of heating and outputting hot water by the gas water heater, large-flow hot water output cannot be provided, and under the condition of large-flow water consumption, the problems of insufficient heat load, high noise, severe working conditions and the like exist in the simple gas water heater. The electric water heater can provide large-flow hot water output, but has smaller capacity, and cannot meet the requirement of large hot water consumption of users. The electric water heater capable of meeting the requirement of large hot water consumption needs 200L-300L capacity, and the electric water heater has huge overall size, occupies a very large installation space and cannot be installed in a common bathroom. Some users may set a plurality of water heating devices, such as a plurality of water heaters including a gas water heater and an electric water heater, but the plurality of water heaters generally provide hot water independently, the plurality of water heaters are not communicated with each other, and the advantages and energy of the plurality of water heaters cannot be combined to provide continuous high-flow hot water for the users. Therefore, the current single water heating device is difficult to meet the requirements of users for large flow and large hot water consumption.

Disclosure of Invention

An object of the present application is to provide a hot water system, through preheating the water of input in the first water heating device, reduce the required heating time of first water heating device heating output hot water, satisfy the user's of user big hot water quantity and large-traffic water use demand. Another object of the present application is to provide a water heating device.

To achieve the above object, the present application discloses, in one aspect, a hot water system comprising:

a first water heating device and a second water heating device;

the first water heating device comprises a first inner container, and a phase change material is arranged in the first inner container;

the first liner is provided with a heating component for heating the phase change material;

a first heat exchanger is arranged in the first liner, and water flowing through the first heat exchanger can exchange heat with the phase change material;

the second water heating device can preheat the water input into the first water heating device, and the preheated water at least partially flows into the first heat exchanger or the preheated water preheated in a preset state at least partially flows into the first heat exchanger;

the first water heating device heats the preheated water and then transmits the preheated water to a water consumption point.

Optionally, the heating component includes an electric heating element disposed on the first liner and extending into the phase change material, or a heating pipe disposed in the first liner or on an outer wall of the first liner for circulating a heating medium.

Optionally, the heating pipe is a round pipe, an elliptic pipe or a micro-channel pipe, and the heating medium is hot water supplied by a gas water heating device or an electric water heating device or a heating refrigerant supplied by a heat pump device.

Optionally, the second water heating device is communicated with a water supply pipeline, and water flowing into the second water heating device from the water supply pipeline is preheated by the second water heating device and then is input into the first water heating device.

Optionally, the water heater further comprises a second heat exchanger, the second heat exchanger comprises a first runner and a second runner, the liquid flowing into the first runner and the liquid flowing into the second runner can exchange heat, the first runner is used for circulating heating medium heated by the second water heater, and tap water in a water supply pipeline input by the second runner is preheated by the heating medium and then input into the first water heater.

Optionally, the second water heating device is a gas water heating device or an electric water heating device.

Optionally, the heating medium includes water or a refrigerant.

Optionally, the second water heating device is a gas water heating device, an electric water heating device or a heat pump water heating device.

Optionally, the first water heating device further comprises a second liner;

the first liner comprises a first water inlet and a first water outlet;

the second liner comprises a second water inlet and a second water outlet;

the first water inlet and the first water outlet are communicated with the first heat exchanger, the first water inlet is used for inputting water into the first heat exchanger, and the first water outlet is used for outputting water heated by the first heat exchanger;

the second water inlet is communicated with the first water outlet, and water flowing out of the first water outlet flows into the second liner through the second water inlet; the second water outlet is used for outputting water which is reheated by the second liner;

the preheated water flows at least partially into the first water inlet.

Optionally, the first water heating device further comprises a constant temperature element, the constant temperature element comprises a first inlet, a second inlet and an output port, the first inlet is connected with the second outlet, the second inlet is used for inputting part of the preheated water or tap water, and the output port is used for outputting water mixed after flowing into the constant temperature element from the first inlet and the second inlet.

Optionally, the first water heating device further comprises a diversion element for diverting the preheated water flowing into the first water heating device to the first water inlet and the second inlet.

Optionally, the flow dividing element comprises a three-way joint or a three-way flow distribution valve or at least two solenoid valves or at least two flow regulating valves.

Optionally, the first water heating device further comprises a second liner;

the first liner comprises a first water inlet and a first water outlet;

the second liner comprises a second water inlet and a second water outlet;

the first water inlet and the first water outlet are communicated with the first heat exchanger;

the first inner container and the second inner container are arranged in parallel, and preheated water flowing into the first water heating device can flow into the first inner container and the second inner container through the first water inlet and the second water inlet respectively; the preheated water flowing into the first liner flows out of the first water outlet after being heated, and the preheated water flowing into the second liner flows out of the second water outlet after being heated;

the preheated water at least partially flows into the first water inlet in a predetermined state.

Optionally, the first water heating device further comprises a diversion element for diverting the preheated water flowing into the first water heating device to the first water inlet and/or the second water inlet.

Optionally, the first water heating device further comprises a constant temperature element, the constant temperature element comprises a first inlet, a second inlet and an output port, the first inlet is used for inputting heated water flowing out of the first water outlet and/or the second water outlet, the second inlet is used for inputting the part of the preheated water or tap water, and the output port is used for outputting water mixed after flowing into the constant temperature element from the first inlet and the second inlet.

Optionally, the preheated water input to the second inlet is split by the splitting element.

Optionally, the flow dividing element comprises a three-way joint or a four-way joint or a three-way flow distribution valve or a four-way flow distribution valve or at least two flow regulating valves or at least two electromagnetic valves.

Alternatively to this, the method may comprise,

the second liner further comprises a heating element for heating the water stored in the second liner.

Optionally, the water heater further comprises a flow control device and a bypass pipeline which is connected with the second water heating device in parallel, wherein the flow control device is used for supplying tap water in the water supply pipeline to the second water heating device or the bypass pipeline, and water flowing out of the bypass pipeline flows to the first water heating device.

Optionally, the flow control device is arranged on the bypass pipeline, and the flow control device is an electromagnetic valve.

Optionally, a thermostatic element is further included;

the constant temperature element comprises a first inlet, a second inlet and an output port, wherein the first inlet is used for inputting the preheated water heated by the first water heating device, the second inlet is used for inputting part of the preheated water or tap water, and the output port is used for outputting the water mixed after flowing into the constant temperature element from the first inlet and the second inlet to a water consumption point.

Optionally, the constant temperature element is integrally arranged on the first water heating device.

Optionally, further comprising a soft water module;

the soft water module is used for softening water input into the first water heating device.

Alternatively to this, the method may comprise,

the soft water module is arranged at the upstream or downstream of the second water heating device and is used for softening water flowing into or out of the second water heating device.

The application also discloses a water heating device, include:

a water inlet part and a water outlet part;

the first inner container is provided with a phase change material;

the water inlet part is used for inputting preheated water heated by the heating device;

at least part of the preheated water input into the water inlet part flows into the first heat exchanger or at least part of the preheated water input into the water inlet part in a preset state flows into the first heat exchanger;

the water outlet part is used for outputting the preheated water heated by the water heating device;

Optionally, the device further comprises a second liner;

the first liner comprises a first water inlet and a first water outlet;

the second liner comprises a second water inlet and a second water outlet;

the first water inlet of the first inner container is connected with the water inlet part, and the second water outlet of the second inner container is connected with the water outlet part;

the first water inlet is for receiving at least a portion of the preheated water.

Optionally, the water heater further comprises a constant-temperature element, wherein the constant-temperature element comprises a first inlet, a second inlet and an output port, the first inlet is connected with the second water outlet, the second inlet is used for inputting part of the preheated water or tap water, and the output port is used for outputting water which flows into the constant-temperature element from the first inlet and the second inlet and is mixed.

Optionally, a diversion element is further included for diverting the incoming preheated water to the first water inlet and the second inlet.

Optionally, the device further comprises a second liner;

the first liner comprises a first water inlet and a first water outlet;

the second liner comprises a second water inlet and a second water outlet;

the first water inlet and the second water inlet are respectively connected with the water inlet part, and the first water outlet and the second water outlet are respectively connected with the water outlet part;

the first water inlet is used for receiving at least part of the preheated water under a preset state.

Optionally, a flow dividing element is further included for dividing the preheated water flowing into the first water heating device to the first water inlet and/or the second water inlet.

Optionally, the water heater further comprises a constant temperature element, wherein the constant temperature element comprises a first inlet, a second inlet and an output port, the first inlet is used for inputting heated water flowing out of the first water outlet and/or the second water outlet, the second inlet is used for inputting part of the preheated water or tap water, and the output port is used for outputting water mixed after flowing into the constant temperature element from the first inlet and the second inlet.

Optionally, the second inlet is connected to the flow dividing element.

Alternatively to this, the method may comprise,

the second liner includes a heating element for heating the water stored in the second liner.

Optionally, the water heating device further comprises a constant temperature element;

the constant temperature element comprises a first inlet, a second inlet and an output port, wherein the first inlet is used for inputting the preheated water heated by the first water heating device, the second inlet is used for inputting part of the preheated water or tap water, and the output port is used for outputting the water mixed after flowing into the constant temperature element from the first inlet and the second inlet.

The first inner container of the first water heating device is provided with the phase change material, the phase change material can be heated through the heating component in the first inner container, and the heated phase change material can exchange heat with water flowing through the first heat exchanger to heat the water flowing through the first heat exchanger. And, this application preheats the water of input first water heating device through second water heating device, and the preheated water after preheating flows into first water heating device at least partially to first water heating device can be to the water consumption point after the preheated water intensifies. In the process, the water input into the first water heating device is preheated by the second water heating device, so that the temperature of the water input into the first water heating device is increased, the energy required by the first water heating device to heat the preheated water to obtain hot water which is conveyed to a water consumption point is reduced relative to the energy required by the first water heating device to heat the water which is not preheated to obtain hot water with the same temperature, and the efficiency of outputting the hot water by the first water heating device is increased, so that the hot water quantity conveyed to the water consumption point by the first water heating device can be increased. The second water heating device and the first water heating device provide energy for the process of heating to obtain hot water together, and then the hot water is output to a water consumption point through the first water heating device, so that the capability of the first water heating device for continuously outputting hot water is improved, and the requirement of a user for large water consumption of hot water is met.

Drawings

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

FIG. 1 shows a schematic structural diagram of a first embodiment of a water heating system of the present application;

FIG. 2 shows a schematic structural diagram of a second embodiment of the water heating system of the present application;

FIG. 3 shows a schematic structural diagram of a third embodiment of a water heating system of the present application;

fig. 4 shows a schematic structural diagram of a fourth embodiment of the water heating system of the present application.

Reference numerals:

1. a first water heating device; 11. a first liner; 111. a first heat exchanger; 12. a second liner; 2. a second water heating device; 3. a water supply line; 4. a thermostatic element; 41. a first inlet; 42. a second inlet; 43. an output port; 5. a water pipeline; 51. water is used for spot filling; 6. a booster pump; 71. a first electromagnetic valve; 72. a second electromagnetic valve; 73. a third electromagnetic valve; 74. a circulation valve; 75. a fourth electromagnetic valve; 76. a fifth electromagnetic valve; 77. and a sixth electromagnetic valve.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not for limiting a particular order or sequence. It should be understood that the distinctive descriptions of these objects may be interchanged where appropriate. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

The positional relationship of "parallel" or "perpendicular" includes not only the positional relationship of completely "parallel" or "perpendicular" but also the positional relationship in which the angular deviation from completely "parallel" or "perpendicular" is within a predetermined deviation range.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In the prior art, when more water using devices are used in a user room, the demand of hot water for the user is increased sharply. In particular, when the indoor area is large, more water consuming devices may be provided, including, but not limited to, shower devices and faucet devices. For example, a user's room may include a plurality of toilets, each of which may require a shower device and faucet or other water-consuming device capable of providing hot water, whereby the user's hot water usage may be at a higher level. However, currently, one or more water heaters installed in a user's room are typically installed independently, and the water heaters include, but are not limited to, gas water heaters, electric water heaters, and the like. The gas water heater heats the input tap water in real time to obtain hot water and then outputs the hot water, however, the water resistance in the heating process of the gas water heater is large, and the output of the hot water with large flow cannot be realized. The electric water heater is usually a water storage type water heater, the electric water heater comprises an inner container, the electric water heater can heat the water stored in the inner container to obtain hot water with preset temperature, then the heating is stopped, the electric water heater is not limited by water resistance, and can provide large-flow hot water, but the amount of hot water which can be provided by the electric water heater is limited by the capacity of the inner container, the large-flow hot water can not be continuously provided, the short-time available amount of hot water is limited by the capacity of the inner container of the electric water heater, and after the hot water in the inner container is basically used up, the real-time heating of the electric water heater still can not meet the continuous and large-dosage hot water requirement of a user. Therefore, the existing water heater provided independently has a limited ability to provide hot water. The first inner container of the first water heating device is provided with the phase change material, the phase change material can be heated through the heating component in the first inner container, and the heated phase change material can exchange heat with water flowing through the first heat exchanger to heat the water flowing through the first heat exchanger. And, this application preheats the water of input first water heating device through second water heating device, and the preheated water after preheating flows into first water heating device at least partially to first water heating device can be to the water consumption point after the preheated water intensifies. In the process, the water input into the first water heating device is preheated by the second water heating device, so that the temperature of the water input into the first water heating device is increased, the energy required by the first water heating device for heating the preheated water to obtain hot water which is conveyed to a water consumption point is reduced relative to the energy required by heating the water which is not preheated to obtain hot water with the same temperature, and the efficiency of outputting the hot water by the first water heating device is increased, thereby improving the quantity of the hot water conveyed to the water consumption point by the first water heating device and meeting the large water consumption requirement of a user on the hot water.

Fig. 1-4 show schematic diagrams of specific embodiments of the water heating system of the present application. The hot water system provided by the embodiment of the application comprises a first water heating device 1 and a second water heating device 2.

The first water heating device 1 comprises a first inner container 11, wherein a phase change material is arranged in the first inner container 11; the first liner 11 is provided with a heating means for heating the phase change material.

The first liner 11 is provided with a first heat exchanger 111, and water flowing through the first heat exchanger 111 can exchange heat with the phase change material.

The second water heating device 2 can preheat the water input into the first water heating device 1, and the preheated water at least partially flows into the first heat exchanger 111 or the preheated water preheated in a preset state at least partially flows into the first heat exchanger 111; the first water heating device 1 heats the preheated water and then delivers the preheated water to the water consumption point 51.

From this, be provided with phase change material in the first inner bag 11 of this application's first water heating device 1, the heating element in the accessible first inner bag 11 heats phase change material, and the phase change material after the heating can carry out the heat exchange with the water that flows through in the first heat exchanger 111, heats the water that flows through in the first heat exchanger 111. In addition, the water input into the first water heating device 1 is preheated by the second water heating device 2, and the preheated water at least partially flows into the first water heating device 1, so that the first water heating device 1 can heat the preheated water and then deliver the heated water to the water consumption point 51. In the process, the water input into the first water heating device 1 is preheated by the second water heating device 2, so that the temperature of the preheated water input into the first water heating device 1 is increased, the energy required by the first water heating device 1 for heating the preheated water to obtain the hot water which is transmitted to the water consumption point 51 is reduced relative to the energy required by the hot water which is heated to obtain the same temperature to the water which is not preheated, the efficiency of the first water heating device 1 for outputting the hot water is increased, and therefore the hot water quantity of the first water heating device 1 which is transmitted to the water consumption point 51 can be increased, the second water heating device 2 and the first water heating device 1 supply energy for the process of heating to obtain the hot water together, and then the hot water is output to the water consumption point through the first water heating device 1, so that the capability of continuously outputting the hot water by the first water heating device 1 is improved, and the requirement of a user for the large water consumption of the hot water is met.

In the present application, the second water heating device 2 can preheat the water fed into the first water heating device 1. The second water heating device 2 of the present application may be used to preheat water input to the first water heating device 1, and may include an embodiment in which water input to the first water heating device 1 is preheated by the second water heating device 2 and then input to the first water heating device 1, and may also include an embodiment in which a heating medium output from the second water heating device 2 and heated by the second water heating device 2 is used to preheat water input to the first water heating device 1 by heat exchange.

Specifically, in some embodiments, the heating component may include an electric heating element disposed on the first liner 11 and extending into the phase change material, where the electric heating element may be energized to heat the phase change material, and the heated phase change material may exchange heat with water flowing through the first heat exchanger 111 to heat the water flowing through the first heat exchanger 111. Wherein the water input into the first heat exchanger 111 in the first water heating device 1 is the water preheated by the second water heating device 2.

The electric heating element can be a heating rod and the like, and the heating rod can heat the phase change material after being electrified. Of course, in practical applications, other elements may be used as the electric heating element, which is not limited in this application.

In other embodiments, the heating means may also comprise a heating pipe provided in the first inner container 11 or on the outer wall of the first inner container 11 for the circulation of a heating medium. The heating pipe can be arranged in the first inner container 11, and the heating pipe arranged in the first inner container 11 can be directly contacted with the phase-change material to heat the phase-change material, so that the heating effect is better. Of course, the heating pipe provided in the first liner 11 may not be in direct contact with the phase change material, so that the phase change material may be heated by the heating medium in the heating pipe. The heating pipe can also be arranged on the outer wall of the first inner container 11, and the heating medium in the heating pipe transmits heat energy to the phase change material in the first inner container 11 through the heating pipe and the first inner container 11 to heat the phase change material.

It should be noted that the heating pipe may be a circular pipe, an oval pipe, or a micro-channel pipe, and other available pipes or pipe combinations may be selected by those skilled in the art according to practical requirements to form the heating pipe, which is not limited in this application.

The heating medium may be hot water supplied from a gas water heater or an electric water heater, or may be a heating refrigerant supplied from a heat pump. The gas water heater may be a gas water heater, or may be another available gas water heater, and the electric water heater may be an electric water heater, or may be another available electric water heater.

When the second water heating device 2 is a gas water heating device or an electric water heating device, the hot water output by the second water heating device 2 heats the water input into the first water heating device 1, so that the purpose that the second water heating device 2 preheats the water input into the first water heating device 1 is achieved. The second water heating device 2 may be a heat pump device, so that the heating refrigerant output by the second water heating device 2 can heat the water input into the first water heating device 1 in a heat exchange manner, thereby realizing the purpose of preheating the water input into the first water heating device 1 by the second water heating device 2.

In some embodiments, the second water heating device 2 may be in communication with the water supply line 3, and the water output from the water supply line 3 for inputting into the first water heating device 1 is preheated by the second water heating device 2 and then input into the first water heating device 1.

When the second water heating device 2 is a gas water heating device or an electric water heating device, the second water heating device 2 preheats water output by the water pipeline 3 and then inputs the water into the first water heating device 1, so that the purpose that the second water heating device 2 preheats the water input into the first water heating device 1 is realized.

It should be noted that, in an alternative embodiment, when the water input into the first water heating device 1 is first input into the second water heating device 2 for preheating, considering that the flow rate of the hot water output by the first water heating device 1 is affected by the water resistance when the second water heating device 2 adopts a gas water heater, the booster pump 6 may be disposed on the water supply pipeline 3 for water delivery to boost the pressure of the water input into the second water heating device 2 for preheating, so as to overcome the influence of the water resistance of the second water heating device 2 and ensure the flow rate of the hot water output by the first water heating device 1.

In some embodiments, the hot water system may further comprise a second heat exchanger. The second heat exchanger comprises a first runner and a second runner, liquid flowing into the first runner and liquid flowing into the second runner can perform heat exchange, the first runner is used for circulating heating media heated by the second water heating device, and tap water in a water supply pipeline 3 input by the second runner is preheated by the heating media and then input into the first water heating device 1. The second water heating device 2 can output a heated heating medium, and the heating medium flows through the first flow passage of the second heat exchanger. Tap water output by the water supply pipeline 3 can circulate in a second flow passage of the second heat exchanger, and a heating medium circulating in the first flow passage heats tap water circulating in the second flow passage through the second heat exchanger and then is input into the first water heating device 1, so that the purpose of preheating water input into the first water heating device 1 by the second water heating device 2 is realized. In this process, the heating medium output by the second water heating device 2 is not directly input into the first water heating device 1, and is only used for preheating the water input into the first water heating device 1, so that the water resistance of the second water heating device 2 cannot influence the flow of the hot water output by the first water heating device 1, and no additional supercharging devices such as a booster pump 6 are required to overcome the influence of the water resistance.

The second water heating device 2 may be a gas water heating device, an electric water heating device or a heat pump water heating device, so that hot water or heating refrigerant output by the second water heating device 2 can heat water input into the first water heating device 1 through the second heat exchanger, the purpose that the second water heating device 2 preheats water input into the first water heating device 1 is achieved, the selection range of the second water heating device 2 is expanded through the arrangement of the second heat exchanger, and the influence of the second water heating device 2 on the first water heating device 1 is not needed to be considered.

The second water heating device 2 of the present application may preheat a part of the water fed to the first water heating device 1, or may preheat all the water fed to the first water heating device, which is not limited in this application.

Specifically, in some embodiments, when the first water heating device 1 includes not only the first inner container 11 but also at least one other inner container, the second water heating device 2 may preheat only the water input to the first inner container 11 of the first water heating device 1, and may preheat the water input to the first inner container 11 and at least one other inner container of the first water heating device 1.

The first liner 11 and the other liners may be disposed in series or in parallel.

When the first inner container 11 is connected in series with other inner containers, water entering the first water heating device 1 flows into the next inner container after being heated by the first inner container 11, and similarly, the next inner container outputs heated water flowing into the last inner container to the water consumption point 51 after reheating the heated water flowing into the last inner container, and then inputting the heated water into the next inner container until the last inner container outputs heated hot water to the water consumption point 51.

For example, in a specific embodiment, the first water heating device 1 further comprises a second liner 12. The first liner 11 comprises a first water inlet and a first water outlet; the second liner 12 includes a second water inlet and a second water outlet; the first water inlet and the first water outlet are communicated with the first heat exchanger 111, the first water inlet is used for inputting water into the first heat exchanger 111, and the first water outlet is used for outputting water heated by the first heat exchanger 111; the second water inlet is communicated with the first water outlet, and water flowing out of the first water outlet flows into the second liner 12 through the second water inlet; the second water outlet is used for outputting water which is reheated by the second liner 12; the preheated water flows at least partially into the first water inlet.

The first water outlet of the first liner 11 is communicated with the second water inlet of the second liner 12, and the water output by the first liner 11 and heated by the first heat exchanger 111 is input into the second liner 12 through the second water inlet, so that the serial connection of the waterways of the first liner 11 and the second liner 12 is realized. At least part of the preheated water flows through the first inner container 11 and the second inner container 12 in sequence and then is output, and the first inner container and/or the second inner container heat the flowing water.

When the first inner container 11 is arranged in parallel with other inner containers, the preheated water passing through the second water heating device 2 can flow into at least one of the inner containers respectively. Accordingly, the first liner 11 and the other liners provided in parallel may be supplied with the preheated water or the tap water supplied to the water supply line 3, and the tap water or the preheated water supplied to each liner is heated and then outputted.

For example, in some embodiments, the first water heating device 1 further comprises a second liner 12; the first liner 11 comprises a first water inlet and a first water outlet; the second liner 12 includes a second water inlet and a second water outlet; the first water inlet and the first water outlet are communicated with the first heat exchanger 111; the first liner 11 is parallel to the second liner 12, and the preheated water flowing into the first water heating device 1 can flow into the first liner 11 and the second liner 12 through the first water inlet and the second water inlet respectively; the preheated water flowing into the first liner 11 flows out of the first water outlet after being heated, and the preheated water flowing into the second liner 12 flows out of the second water outlet after being heated; the preheated water at least partially flows into the first water inlet in a predetermined state. The first water inlet and the second water inlet of the first liner 11 and the second liner 12 can respectively input preheated water, and the preheated water is heated by the first liner 11 and the second liner 12 and then is output through the first water outlet and the second water outlet of the first liner 11 and the second liner 12 respectively.

The first liner 11 and the other liners provided in parallel can be supplied with preheated water or tap water from the water supply line 3, respectively, through separate lines. Of course, at least part of the pipes for inputting the preheated water into the plurality of inner containers may be combined into one pipe, the preheated water preheated by the second water heating device 2 is received through one pipe, and then the preheated water may be split into different inner containers by providing a splitting element on the pipe. Thereby, whether or not to input the preheating water to the respective inner containers can be controlled by controlling the split state of the split element, wherein at least part of the preheating water can be flowed into the first water inlet to input the preheating water to the first inner container 11 by switching the split state of the split element to a predetermined state.

For example, in some embodiments, when the first water heating device 1 further comprises the second liner 12, the first water heating device 1 may further comprise a diverting element for diverting the preheated water flowing into the first water heating device 1 to the first water inlet and/or the second water inlet.

The first liner 11 and the second liner 12 may be supplied with the preheated water through separate pipes, or a plurality of pipes for supplying the preheated water to the first liner 11 and the second liner 12 may be combined together through a flow dividing element, and the flow dividing element may control whether or not the preheated water is supplied to the first liner 11 and the second liner 12.

Optionally, the flow dividing element comprises a three-way joint or a three-way flow distribution valve or at least two solenoid valves or at least two flow regulating valves. Of course, in practical applications, those skilled in the art may select other possible shunt elements according to practical needs, which is not limited in this application.

The first water heating device 1 may be directly connected to the water supply line 3 to receive tap water supplied from the water supply line 3. Thus, the first liner 11 of the first water heating device 1 may be supplied with only the preheated water preheated by the second water heating device 2, or may be supplied with both the preheated water preheated by the second water heating device 2 and tap water supplied through the water supply line 3. For example, when the first inner container 11 includes a first water inlet and a first water outlet communicating with the first heat exchanger 111, the first water inlet inputs the inputted water into the first heat exchanger 111 to heat and then outputs the inputted water through the first water outlet. In some embodiments, the first water inlet of the first liner 11 may be in communication with only a pipe through which the preheated water is inputted, and the preheated water is inputted only to the first heat exchanger 111. In other embodiments, the first water inlet may also be in communication with both the water supply line for incoming tap water and the line for incoming preheated water, receiving incoming preheated water and/or tap water.

Similarly, when the first water heating device 1 includes other inner containers, the other inner containers may be independently supplied with the preheated water supplied through the second water heating device 2, may be independently supplied with the tap water supplied through the tap water supply pipe, and may be simultaneously connected to the preheated water supply pipe and the tap water supply pipe to receive the preheated water and/or the tap water.

When the first water heating device 1 includes a plurality of inner containers, the plurality of inner containers may be simultaneously connected to the pipe for inputting the preheating water or the water supply pipe for inputting the tap water, and the pipe for inputting the preheating water or the water supply pipe for inputting the tap water may be respectively connected to the plurality of inner containers through the flow dividing element, and the input of the preheating water and/or the tap water to the respective inner containers may be controlled through the flow dividing element.

In an alternative embodiment, a thermostatic element 4 may also be provided in the hot water system in order to be able to continuously supply constant temperature water with stable water temperature to the user. The thermostatic element 4 comprises a first inlet 41, a second inlet 42 and an outlet 43, said outlet 43 being adapted to output water which has been mixed after flowing from said first inlet 41 and said second inlet 42 into said thermostatic element 4.

Specifically, the first inlet 41 of the constant temperature element 4 is in communication with the first water heating device 1, hot water is input from the first water heating device 1, the second inlet 42 of the constant temperature element 4 is available for inputting a portion of the preheated water or tap water, and the output 43 is used for outputting water obtained by mixing the hot water input from the first water heating device 1 and the preheated water or tap water input from the second inlet 42.

It should be noted that, a temperature detection module and a control module may be further disposed in the hot water system, where the temperature detection module is used to detect the water temperatures of the first inlet 41, the second inlet 42 and the output port 43 of the thermostatic element 4. Further, the control module may control the opening degrees of the first inlet 41 and the second inlet 42 according to the water temperatures of the first inlet 41, the second inlet 42 and the output port 43 to control the amount of water inputted from the first inlet 41 and the second inlet 42 so that the water temperature of the mixed water outputted from the output port 43 of the constant temperature element 4 is kept constant. Alternatively, the temperature detection module may include a first temperature sensor that detects the temperature of water input from the first inlet 41 of the thermostatic element 4, a second temperature sensor that detects the temperature of water input from the second inlet 42 of the thermostatic element 4, and a third temperature sensor that detects the temperature of water output from the output 43 of the thermostatic element 4. The control module can be realized by adopting a control chip. Of course, in practical applications, the temperature detection module and the control module may be implemented in other manners, which is not limited in this application.

In some embodiments, when the first water heating device 1 comprises the first inner container 11, the first inlet 41 of the thermostatic element 4 communicates with the water outlet of the first inner container 11, the first inlet 41 inputting the hot water output by the first inner container 11 through the water outlet. In other embodiments, when the first water heating device 1 includes a plurality of inner containers and the plurality of inner containers are sequentially connected in series, the first inlet 41 of the constant temperature element 4 is connected to the water outlet of the last inner container connected in series, and the first inlet 41 inputs the hot water output from the last inner container through the water outlet and sequentially heated by the plurality of inner containers. In still other embodiments, when the first water heating device 1 includes a plurality of inner containers, and the plurality of inner containers are arranged in parallel purely or in part, the plurality of inner containers of the first water heating device 1 all output hot water, so that the first inlet 41 of the constant temperature element 4 is communicated with the water outlet of the inner container of the first water heating device 1, which outputs hot water, and the first inlet 41 inputs the hot water output by the plurality of inner containers and heated by the one or more inner containers.

It should be noted that the constant temperature element 4 may be integrated into the first water heating device 1, or may be disposed outside the first water heating device 1, and in practical applications, a person skilled in the art may set the position of the constant temperature element 4 according to practical situations, which is not limited in this application.

In an alternative embodiment, the hot water system further comprises a flow control device and a bypass pipeline arranged in parallel with the second water heating device 2, wherein the flow control device is used for supplying tap water in the water supply pipeline 3 to the second water heating device 2 or the bypass pipeline, and water flowing out of the bypass pipeline flows to the first water heating device 1.

It will be appreciated that the second water heating device 2 may preheat the water supplied to the first water heating device 1, and in some embodiments, tap water supplied to the water supply line 3 for supplying to the first water heating device 1 needs to be supplied to the second water heating device 2 before being preheated by the second water heating device 2 and then supplied to the first water heating device 1, so that the second water heating device 2 may preheat the water supplied to the first water heating device 1. In some situations, the amount of hot water used by the user may not be large, and at this time, the second water heating device 2 preheats the water input by the first water heating device 1, so that on one hand, when the second water heating device 2 preheats the water, there may be a water resistance that affects the flow of the hot water output by the first water heating device 1, and on the other hand, the service life and energy waste of the second water heating device 2 may also result.

Thus, in this alternative embodiment, a parallel bypass line may be provided for the second water heating device 2 and the tap water of the water supply line 3 is controlled by the flow control device to the second water heating device 2 or the bypass line. When the flow control device controls the tap water of the water supply pipeline 3 to flow to the second water heating device 2, the second water heating device 2 preheats the input tap water and then inputs the tap water into the first water heating device 1, so that the water heating device is suitable for a scene with large hot water consumption. When the flow control device controls the tap water of the water supply pipeline 3 to flow to the bypass pipeline, the tap water of the water supply pipeline 3 can flow to the first water heating device 1 through the bypass pipeline, hot water is provided only through the first water heating device 1, and the water supply device is suitable for a scene with small hot water consumption.

Optionally, the flow control device is arranged on the bypass pipeline, and the flow control device is an electromagnetic valve. Specifically, the flow control device can be arranged on the bypass pipeline, and the bypass pipeline is controlled to be conducted or closed through the flow control device. When the flow control device controls the bypass pipeline to be conducted, the second water heating device 2 does not work, and tap water input by the water supply pipeline 3 can be input into the first water heating device 1 through the bypass pipeline. When the bypass pipeline is controlled to be closed by the flow control device, the second water heating device 2 can normally preheat tap water input into the first water heating device 1 through the water supply pipeline 3 and then input into the first water heating device 1.

It should be noted that, the flow control device may be an electromagnetic valve, and the switch state of the electromagnetic valve is controlled by an electric signal to further control the on or off of the bypass pipeline. Of course, in other embodiments, other available flow control devices may be used as the flow control device, which is not limited in this application.

In an alternative embodiment, the water heating system may further include a soft water module that softens water input to the first water heating device 1, prevents scale from being generated in the first water heating device 1 during heating, improves water quality, and reduces the service life of the first water heating device 1.

It will be appreciated that the second water heating device 2 may preheat water supplied to the first water heating device 1, and water supplied to the first water heating device 1 may first enter the second water heating device 2, and the preheated water preheated by the second water heating device 2 may be supplied to the first water heating device 1. Thereby, the soft water module may be provided upstream or downstream of the second water heating device 2 to soften the water inputted into the first water heating device 1.

The soft water module may be disposed upstream of the second water heating device 2. In some embodiments, a soft water module may be provided on the water supply line 3 for supplying tap water to the second water heating device 2, the soft water module softens tap water supplied from the water supply line 3, the softened tap water is supplied to the second water heating device 2, and the preheated water preheated by the second water heating device 2 is further supplied to the first water heating device 1. In other embodiments, the soft water module may be integrated in the second water heating device 2, for example, by using a soft water heater with integrated heating and softening functions. In some embodiments, a soft water module may also be provided downstream of the second water heating device 2. Specifically, the soft water module may be disposed on a pipeline for inputting preheated water from the second water heating device 2 to the first water heating device 1, and then input into the first water heating device 1 after softening the preheated water output from the second water heating device 2.

The water supply line 3 is running water, the second water heating device 2 preheats the water supplied to the first water heating device 1 to obtain preheated water, and the first water heating device 1 heats the preheated water and then supplies the preheated water to the water use point 51. Thus, in the present application, the water temperature of the water supplied to the water point 51 by the first water heating device 1 is greater than the water temperature of the preheated water, which is greater than the water temperature of the tap water. Alternatively, the water temperature of tap water is typically less than 15 ℃, the water temperature of preheated water is typically around 25 ℃, and the water temperature of water delivered to the water use point 51 is typically around 40 ℃.

In an alternative embodiment, the first water heating device 1 further comprises a second liner 12. The first liner 11 comprises a first water inlet and a first water outlet; the second liner 12 includes a second water inlet and a second water outlet; the first water inlet and the first water outlet are communicated with the first heat exchanger 111, the first water inlet is used for inputting water into the first heat exchanger 111, and the first water outlet is used for outputting water heated by the first heat exchanger 111; the second water inlet is communicated with the first water outlet, and water flowing out of the first water outlet flows into the second liner 12 through the second water inlet; the second water outlet is used for outputting water which is reheated by the second liner 12; the preheated water flows at least partially into the first water inlet.

Specifically, in this alternative embodiment, the first water heating device 1 includes a first inner container 11 and a second inner container 12, where the first inner container 11 and the second inner container 12 are disposed in series, the first inner container 11 heats the preheated water input from the first water inlet, and outputs the preheated water to the second inner container 12 through the first water outlet and the second water inlet that are communicated to perform reheating, and the second inner container 12 outputs the reheated hot water through the second water outlet.

Optionally, the hot water system further comprises a constant temperature element 4, the constant temperature element 4 comprises a first inlet 41, a second inlet 42 and an output port 43, the first inlet 41 is connected with the second outlet, the second inlet 42 is used for inputting part of the preheated water or tap water, and the output port 43 is used for outputting water mixed after flowing into the constant temperature element 4 from the first inlet 41 and the second inlet 42.

In particular, it is understood that the first water heating device 1 may further incorporate a thermostatic element 4, the first inlet 41 of the thermostatic element 4 being connected to the second outlet for receiving the hot water output by the second liner 12. In one embodiment, the second inlet 42 of the thermostatic element 4 may be directly connected to the water supply line 3, receive tap water input from the water supply line 3, mix tap water with hot water output from the second liner 12, and deliver the mixed tap water to the water point 51 through the output 43 of the thermostatic element 4. In another embodiment, the second inlet 42 of the thermostatic element 4 may also receive the preheated water of the second water heating device 2, so that the thermostatic element 4 mixes the preheated water with the hot water output from the second liner 12 and then transmits the mixed hot water to the water use point 51 through the output 43 of the thermostatic element 4. In other embodiments, the second inlet 42 of the thermostatic element 4 may be simultaneously connected to the pipe for inputting preheated water and the water supply pipe 3 for inputting tap water, respectively, to receive water obtained by mixing tap water with preheated water, and to deliver the water obtained by mixing tap water with preheated water to the water point 51 after mixing the water with hot water outputted from the second liner 12.

Optionally, the first water heating device 1 further comprises a diversion element for diverting the preheated water flowing into the first water heating device 1 to the first water inlet and the second inlet 42.

In particular, it can be appreciated that when the second inlet 42 of the thermostatic element 4 inputs the preheated water preheated by the second water heating device 2, the preheated water preheated by the second water heating device 2 also needs to be input into the first liner 11. Thereby, the preheated water fraction fed into the first water heating device 1 by the second water heating device 2 can be split by the splitting element to the second inlet 42 of the thermostatic element 4. In a specific example, the second water heating device 2 transfers the preheated water to the first water heating device 1 through a first water transfer line, and a flow dividing element may be provided on the first water transfer line, the flow dividing element divides the preheated water in the first water transfer line and transfers the preheated water to the second inlet 42 of the thermostatic element 4 through a second water transfer line.

In an alternative embodiment, the first water heating device 1 further comprises a second liner 12; the first liner 11 comprises a first water inlet and a first water outlet; the second liner 12 includes a second water inlet and a second water outlet; the first water inlet and the first water outlet are communicated with the first heat exchanger 111; the first liner 11 is parallel to the second liner 12, and the preheated water flowing into the first water heating device 1 can flow into the first liner 11 and the second liner 12 through the first water inlet and the second water inlet respectively; the preheated water flowing into the first liner 11 flows out of the first water outlet after being heated, and the preheated water flowing into the second liner 12 flows out of the second water outlet after being heated; the preheated water at least partially flows into the first water inlet in a predetermined state.

Specifically, in this alternative embodiment, the first water heating device 1 includes a first inner container 11 and a second inner container 12, where the first inner container 11 and the second inner container 12 are arranged in parallel, and a first water inlet of the first inner container 11 and a second water inlet of the second inner container 12 respectively and independently receive preheated water, and the preheated water flowing into the first inner container 11 is output through a first water outlet after being heated by the first inner container 11, and the preheated water flowing into the second inner container 12 is output through a second water outlet after being heated by the second inner container 12.

The preheated water at least partially flows into the first water inlet in a predetermined state, which is a state in which the first liner 11 of the first water heating device 2 is required. Specifically, the hot water system can be operated in various states, when the hot water system is in a predetermined state, the first liner 11 is required to be used for heating water, and at least part of the preheated water flows into the first water inlet; when the hot water system is in other states in which the first liner 11 is not needed, for example only the second liner 12 of the first water heating device 2 is needed, then the preheated water does not flow all the way into the first water inlet. In a specific example, when the first water heating device 1 includes the second liner 12, the preheated water may be input into the first liner 11 and/or the second liner 12 through the diversion element, so that the on state of the diversion element may be controlled to control the operation state of the hot water system, when the hot water system is in a predetermined state, the diversion element is controlled to input the preheated water into the first liner 11, and when the hot water system is in other states, the diversion element is controlled not to input the preheated water into the first liner 11.

Optionally, the first water heating device 1 further comprises a diverting element for diverting the preheated water flowing into the first water heating device 1 to the first water inlet and/or the second water inlet.

Specifically, at least part of the pipes for inputting the preheated water into the first and second inner containers 11 and 12 may be combined into one pipe, the preheated water preheated by the second water heating device 2 is received through one pipe, and then the preheated water may be split into the first and/or second inner containers 11 and 12 by providing a splitting element on the pipe. Thereby, whether or not to input the preheated water to the two inner containers can be controlled by controlling the split state of the split element, wherein at least part of the preheated water can be made to flow into the first water inlet to input the preheated water to the first inner container 11 by switching the split state of the split element to a predetermined state.

The first water heating device 1 may also be directly connected to the water supply line 3 to receive tap water input from the water supply line 3. Thus, the first liner 11 of the first water heating device 1 may be supplied with only the preheated water preheated by the second water heating device 2, or may be supplied with both the preheated water preheated by the second water heating device 2 and tap water supplied through the water supply line 3. For example, when the first inner container 11 includes a first water inlet and a first water outlet communicating with the first heat exchanger 111, the first water inlet inputs the inputted water into the first heat exchanger 111 to heat and then outputs the inputted water through the first water outlet. In some embodiments, the first water inlet of the first liner 11 may be in communication with only a pipe through which the preheated water is inputted, and the preheated water is inputted only to the first heat exchanger 111. In other embodiments, the first water inlet may also be in communication with both the water supply line for incoming tap water and the line for incoming preheated water, receiving incoming preheated water and/or tap water.

Similarly, the second liner 12 may be independently supplied with the preheated water supplied from the second water heating device 2, may be independently supplied with the tap water supplied from the tap water supply line, may be supplied with the tap water supplied from the tap water supply line, and may be simultaneously connected to the preheated water supply line and the tap water supply line to supply the preheated water and/or tap water.

When the first inner container 11 and the second inner container 12 included in the first water heating device 1 are simultaneously communicated with a pipeline for inputting preheated water or a water supply pipeline for inputting tap water, the pipeline for inputting preheated water or the water supply pipeline for inputting tap water can be respectively communicated with the first inner container 11 and the second inner container 12 through the flow dividing element, and the input of preheated water and/or tap water to the first inner container 11 and the second inner container 12 is controlled through the flow dividing element.

Optionally, the hot water system further comprises a thermostatic element 4, the thermostatic element 4 comprising a first inlet 41 for inputting heated water flowing out of the first water outlet and/or the second water outlet, a second inlet 42 for inputting the portion of the preheated water or tap water, and an output 43 for outputting mixed water flowing into the thermostatic element 4 from the first inlet 41 and the second inlet 42.

In particular, it is understood that the first water heating device 1 may further incorporate a thermostatic element 4, wherein the first inlet 41 of the thermostatic element 4 is connected to the first water outlet and the second water outlet, respectively, and receives the hot water output by the first inner container 11 and/or the second inner container 12. In one embodiment, the second inlet 42 of the thermostatic element 4 may be directly connected to the water supply line 3, and receive tap water input from the water supply line 3, and the thermostatic element 4 mixes the tap water with hot water output from the first liner 11 and/or the second liner 12 and then outputs the mixed tap water to the water use point 51 through the output port 43 of the thermostatic element 4. In another embodiment, the second inlet 42 of the thermostatic element 4 may also receive the preheated water of the second water heating device 2, so that the thermostatic element 4 mixes the preheated water with the hot water output from the first and/or second inner containers 11, 12 and then outputs the mixed hot water to the water use point 51 through the output 43 of the thermostatic element 4. In other embodiments, the second inlet 42 of the thermostatic element 4 may also be respectively connected to the pipe for inputting preheated water and the water supply pipe 3 for inputting tap water, receive water obtained by mixing tap water with preheated water, and deliver the water obtained by mixing tap water with preheated water to the water point 51 after mixing the water with hot water output from the first liner 11 and/or the second liner 12.

Optionally, the preheated water input to the second inlet 42 is split by the splitting element.

In particular, it can be appreciated that when the second inlet 42 of the thermostatic element 4 inputs the preheated water preheated by the second water heating device 2, the preheated water preheated by the second water heating device 2 also needs to be input into the first bladder 11 and/or the second bladder. Thereby, the preheated water output from the second water heating device 2 can be split into the first inner container, the second inner container and the second inlet 42 of the thermostatic element 4 by the split element, respectively. In a specific example, the second water heating device 2 transfers the preheated water to the diversion element through the first water conveying pipeline, and the diversion element diverts the preheated water in the first water conveying pipeline to the second inlet 42 of the constant temperature element 4 through the second water conveying pipeline, to the first liner through the third water conveying pipeline, and to the second liner through the fourth water conveying pipeline.

Optionally, the flow dividing element comprises a three-way joint or a four-way joint or a three-way flow distribution valve or a four-way flow distribution valve or at least two flow regulating valves or at least two electromagnetic valves. Of course, in practical applications, those skilled in the art may select other possible shunt elements according to practical needs, which is not limited in this application.

Optionally, the second liner 12 further includes a heating element for heating the water stored in the second liner 12. The heating element may be a heating rod, etc., and the heating rod may heat the water stored in the second liner 12 after being electrified. Of course, in practical applications, other heating elements may be used as the heating element, which is not limited in this application.

Alternatively, the hot water system may include a water pipe 5, where a plurality of water consuming devices are connected to the water pipe 5, to form a plurality of water consuming points 51 on the water pipe 5, and after the preheated water is warmed, the preheated water may be transferred to the plurality of water consuming devices through the water pipe 5. The water line 5 may further be in communication with the water supply line 3, thereby forming a water circulation line with the first water heating device 1 and the second water heating device 2. The circulation valve 74 can be arranged on the circulation pipeline, when the circulation valve 74 is opened, the circulation valve 74 uses water circulation flow in the water circulation pipeline, and when a user does not start the water using equipment, hot water can be transmitted to each water using point 51, so that the purpose of zero cold water at the water using point 51 is realized.

It should be noted that, a control switch may be disposed at any position of the water circulation pipeline to control the on or off of each pipeline. In practical application, the on/off of each control switch can be controlled according to the actual hot water consumption to control the on/off of the corresponding pipeline, so that at least one of the first water heating device 1 and the second water heating device 2 participates in providing hot water or controlling the water with different temperatures to mix so as to obtain hot water with different temperatures and water volumes, and different working modes of the hot water system are realized.

The present application is further illustrated by the following specific examples.

Example 1

Fig. 1 shows a hot water system of a first embodiment. The hot water system comprises a first water heating device 1 and a second water heating device 2. Wherein the first water heating device 1 comprises a first liner 11. The first liner 11 is provided with a phase change material therein. The first liner 11 is provided with a heating means for heating the phase change material. The first liner 11 is provided with a first heat exchanger 111, and water flowing through the first heat exchanger 111 can exchange heat with the phase change material.

The second water heating device 2 is a gas water heating device. The second water heating device 2 is communicated with a water supply pipeline 3, and tap water of the water supply pipeline 3 is input into the second water heating device 2. The second water heating device 2 preheats tap water in the water supply pipeline 3 and outputs preheated water to the first water heating device 1.

The heating member in the first liner 11 heats the phase change material, and the heated phase change material stores heat. The first heat exchanger 111 of the first liner 11 in the first water heating device 1 receives the preheated water input from the second water heating device 2. The phase change material releases heat to preheat the input preheated water again through the first heat exchanger 111 to obtain hot water, and the first liner 11 outputs the hot water to the constant temperature element 4.

The first inlet 41 of the constant temperature element 4 receives the hot water output by the first liner 11, the second inlet 42 receives the preheated water output by the second water heating device 2, the hot water and the preheated water are mixed to achieve the temperature rise of the preheated water, and the mixed water is conveyed to the water consumption point 51 through the output port 43. The water point 51 may include water equipment in areas such as bathrooms and kitchens.

Other features in this embodiment are similar to those in other embodiments and will not be described here again.

Example two

Fig. 2 shows a hot water system of a second embodiment. The hot water system comprises a first water heating device 1 and a second water heating device 2. The first water heating device 1 is electric water heating equipment and comprises a first inner container 11 and a second inner container 12. The first liner 11 includes a first water inlet and a first water outlet. The second liner 12 includes a second water inlet and a second water outlet.

The first water inlet and the first water outlet are communicated with the first heat exchanger 111, the first water inlet is used for inputting water into the first heat exchanger 111, the first water outlet is used for outputting water heated by the first heat exchanger 111, and the preheated water flows into the first heat exchanger 111 from the first water inlet. The second water inlet is communicated with the first water outlet, and water flowing out of the first water outlet flows into the second liner 12 through the second water inlet; the second water outlet is used for outputting hot water which is reheated by the second liner 12.

The first inlet 41 of the constant temperature element 4 receives the hot water output by the second liner 12, the second inlet 42 receives the preheated water output by the second water heating device 2, the hot water and the preheated water are mixed to achieve the temperature rise of the preheated water, and the mixed water is conveyed to the water consumption point 51 through the output port 43.

In order to alleviate the influence of water resistance when the gas water heating device provides preheated water, in this embodiment, a booster pump 6 is connected to the water supply pipeline 3 for inputting tap water, and the tap water in the water supply pipeline 3 is pressurized and then is input into the second water heating device 2 of the gas water heating device for preheating.

The second water heating device 2 is provided with a bypass pipeline in parallel. And a flow control device is arranged on the bypass pipe. The flow control means may comprise a first solenoid valve 71 for controlling the supply of tap water in the water supply line 3 to the second water heating means 2 or the bypass line, the water flowing from the bypass line flowing to the first water heating means 1 and the thermostatic element 4.

The output 43 of the thermostat element 4 is connected to the water line 5, a plurality of water consuming devices are connected to the water line 5, a plurality of water consuming points 51 are formed on the water line 5, and the mixed water output from the thermostat element 4 is transmitted to the plurality of water consuming devices through the water line 5. The water pipeline 5 is further communicated with the water supply pipeline 3, forms a water circulation pipeline with the first water heating device 1 and the second water heating device 2, and a circulation valve 74 can be further arranged on the circulation pipeline, when the circulation valve 74 is opened, water in the water circulation pipeline circularly flows, and when a user does not start the water equipment, hot water output by the constant-temperature element 4 can be transmitted to each water consumption point 51, so that the purpose of zero cold water consumption of the water consumption point 51 is realized.

The hot water system of this embodiment may operate in different modes.

Mode one: the thermostatic element 4, the first solenoid valve 71 and the circulation valve 74 are closed. The water heating system only heats tap water of the water supply pipeline 3 through the second water heating device 2 and then outputs hot water for users to use. At this time, the second water heating device 2 may be directly connected to the water point 51 for small hot water consumption such as kitchen, and the hot water outputted from the second water heating device 2 is directly transferred to the water point 51 connected to the second water heating device 2 for use.

Mode two: the thermostatic element 4 is opened and the first solenoid valve 71 and the circulation valve 74 are closed. The second water heating device 2 preheats tap water of the water supply pipeline 3 and outputs preheated water to the first liner 11 of the first water heating device 1 and the second inlet 42 of the constant temperature element 4. The output port 43 of the constant temperature element 4 outputs the water obtained by mixing the hot water and the preheated water output by the second liner 12 of the first water heating device 1 to a plurality of water using points 51 of the water using pipeline 5, so as to provide a large hot water consumption.

Mode three: the second inlet 42 and outlet 43 of the thermostatic element 4 and the circulation valve 74 are opened, and the first solenoid valve 71 is closed. The water in the water circulation pipeline circulates through the second water heating device 2 and the constant temperature element 4, so that the zero cold water circulation of only the second water heating device 2 for providing hot water is realized.

Example III

Fig. 3 shows a hot water system of a third embodiment. The hot water system comprises a first water heating device 1 and a second water heating device 2. The first water heating device 1 is electric water heating equipment and comprises a first inner container 11 and a second inner container 12. The first liner 11 includes a first water inlet and a first water outlet. The second liner 12 includes a second water inlet and a second water outlet.

The first water inlet and the first water outlet are communicated with the first heat exchanger 111, the first water inlet is used for inputting water into the first heat exchanger 111, and the first water outlet is used for outputting water heated by the first heat exchanger 111. The first liner 11 is parallel to the second liner 12, and the preheated water flowing into the first water heating device 1 can flow into the first liner 11 and the second liner 12 through the first water inlet and the second water inlet respectively; the preheated water flowing into the first liner 11 flows out from the first water outlet after being heated, and the preheated water flowing into the second liner 12 flows out from the second water outlet after being heated.

The second water heating device 2 is a gas water heating device. The second water heating device 2 is communicated with a water supply pipeline 3, and tap water of the water supply pipeline 3 is input into the second water heating device 2. The second water heating device 2 preheats tap water in the water supply pipeline 3 and then outputs preheated water to the first liner 11 and/or the second liner 12 of the first water heating device 1.

The first inlet 41 of the constant temperature element 4 receives the hot water output by the first inner container 11 and/or the second inner container 12, the second inlet 42 receives the preheated water output by the second water heating device 2, the hot water of the first inner container 11 and/or the second inner container 12 is mixed with the preheated water to realize the temperature rise of the preheated water, and the mixed water is conveyed to the water consumption point 51 through the output port 43.

In order to alleviate the influence of water resistance when the gas water heating device provides preheating water, a booster pump 6 is connected into a water supply pipeline 3 for inputting tap water, and the tap water in the water supply pipeline 3 is pressurized and then is input into a second water heating device 2 of the gas water heating device for preheating.

The preheated water output by the second water heating device 2 is respectively input into the first inner container 11 and the second inner container 12 through two pipelines, a second electromagnetic valve 72 and a third electromagnetic valve 73 are respectively arranged on the two pipelines, and whether the preheated water is input into the first inner container 11 and the second inner container 12 can be controlled by controlling the opening and closing of the second electromagnetic valve 72 and the third electromagnetic valve 73.

The hot water system of this embodiment may operate in different modes.

Mode one: the first solenoid valve 71 is closed, the second solenoid valve 72, the third solenoid valve 73 and the circulation valve 74 are opened, the first inlet 41 and the outlet 43 of the thermostatic element 4 are conducted, and the second inlet 42 is closed. The second water heating device 2 preheats tap water in the water supply pipeline 3 and then outputs preheated water to the first liner 11 and the second liner 12 of the first water heating device 1. The output 43 of the thermostatic element 4 outputs the hot water output from the first and second inner containers 11, 12 of the first water heating device 1 to a plurality of water usage points 51 of the water usage line 5.

Mode two: the first and third solenoid valves 71 and 73 are closed, the second solenoid valve 72 and the circulation valve 74 are opened, and the thermostatic element 4 is opened. The water in the water circulation pipeline circulates through the second water heating device 2, the first water heating device 1 and the constant temperature element 4, but the second water heating device 2 is not started, so that the zero cold water circulation of only the first water heating device 1 for providing hot water is realized.

Mode three: the first electromagnetic valve 71, the second electromagnetic valve 72, the third electromagnetic valve 73, the circulation valve 74 and the constant temperature element 4 are closed, and the hot water system outputs hot water for a user to use after heating tap water of the water supply pipeline 3 only through the second water heating device 2. At this time, the second water heating device 2 may be directly connected to the water point 51 for small hot water consumption such as kitchen, and the hot water outputted from the second water heating device 2 is directly transferred to the water point 51 connected to the second water heating device 2 for use.

Mode four: the first, second and third solenoid valves 71, 72 and 73 are opened, the circulation valve 74 is closed, and the thermostatic element 4 is opened. Tap water in the water supply pipeline 3 does not enter the second water heating device 2, is directly input into the first liner 11 and the second liner 12 of the first water heating device 1 through the bypass pipeline, and hot water is independently supplied through the first water heating device 1. Alternatively, the booster pump 6 may be activated to relieve water resistance when the first liner 11 is heated.

Mode five: the first solenoid valve 71 and the circulation valve 74 are closed, the second solenoid valve 72 and the third solenoid valve 73 are opened, and the thermostatic element 4 is opened. At this time, the second water heating device 2 preheats tap water of the water supply line 3 and then outputs preheated water to the first inner container 11, the second inner container 12 of the first water heating device 1 and the second inlet 42 of the constant temperature element 4. The output port 43 of the constant temperature element 4 outputs the water obtained by mixing the hot water and the preheated water output by the first liner 11 and the second liner 12 of the first water heating device 1 to a plurality of water using points 51 of the water using pipeline 5, so as to provide large hot water consumption.

Example IV

Fig. 4 shows a hot water system of a fourth embodiment. The hot water system comprises a first water heating device 1 and a second water heating device 2. The first water heating device 1 is electric water heating equipment and comprises a first inner container 11 and a second inner container 12. The first liner 11 includes a first water inlet and a first water outlet. The second liner 12 includes a second water inlet and a second water outlet.

The hot water system further comprises a second heat exchanger. The second heat exchanger comprises a first runner and a second runner, liquid flowing into the first runner and liquid flowing into the second runner can perform heat exchange, the first runner is used for circulating heating media heated by the second water heating device, and tap water in a water supply pipeline 3 input by the second runner is preheated by the heating media and then input into the first water heating device 1.

Wherein the second water heating device 2 is a gas water heating device. The second water heating device 2 is communicated with a water supply pipeline 3, and tap water of the water supply pipeline 3 is input into the second water heating device 2. The second water heating device 2 heats tap water in the water supply pipeline 3 and outputs the tap water to the first runner of the second heat exchanger, and tap water flowing in the second runner is preheated by hot water flowing in the first runner and output by the second water heating device 2 and then is input into the first water heating device 1.

The first flow passage of the second heat exchanger is communicated with the water inlet of the water input by the second water heating device 2 and the water outlet of the water output by the preheating pipeline, so that the hot water heated by the tap water flowing out of the water outlet of the second water heating device 2 can flow into the first flow passage of the second heat exchanger through the preheating pipeline to preheat the water in the second flow passage and then is input into the second water heating device 2 from the water inlet for cyclic heating. The preheating pipeline is provided with a fourth electromagnetic valve 75, and the opening or closing of the fourth electromagnetic valve 75 can control the connection or the closing of the preheating pipeline. The water supply line 3 is provided with a fifth solenoid valve 76, and opening or closing of the fifth solenoid valve 76 controls whether tap water is supplied to the second water heating device 2.

The first inlet 41 of the constant temperature element 4 receives the hot water output by the first inner container 11 and the second inner container 12, the second inlet 42 receives the preheated water output by the second flow passage, the hot water of the first inner container 11 and the second inner container 12 is mixed with the preheated water to heat the preheated water, and the mixed water is conveyed to the water consumption point 51 through the output port 43.

In order to alleviate the influence of water resistance when the gas water heating device and the first liner 11 are heated, a booster pump 6 is connected to the water supply pipeline 3 for inputting tap water, and the tap water in the water supply pipeline 3 is pressurized and then is input into the second flow passage of the second heat exchanger and the gas water heating device.

The preheated water output by the second flow passage of the second heat exchanger is respectively input into the first inner container 11 and the second inner container 12 through two pipelines, a second electromagnetic valve 72 and a third electromagnetic valve 73 are respectively arranged on the two pipelines, and whether the preheated water is input into the first inner container 11 and the second inner container 12 or not can be controlled by controlling the opening and closing of the second electromagnetic valve 72 and the third electromagnetic valve 73.

The hot water system of this embodiment may operate in different modes.

Mode one: opening the second solenoid valve 72, the third solenoid valve 73, the fourth solenoid valve 75 and the thermostatic element 4; the fifth solenoid valve 76 is closed. The second water heating device 2 outputs hot water to the first flow passage of the second heat exchanger, preheats tap water of the second flow passage, and inputs preheated water after preheating to the first and second inner containers 11 and 12 of the first water heating device 1 and the second inlet 42 of the constant temperature element 4. The output port 43 of the constant temperature element 4 outputs the water obtained by mixing the hot water output from the first liner 11 and the second liner 12 of the first water heating device 1 and the preheated water in the second flow channel to a plurality of water using points 51 of the water using pipeline 5.

Mode two: closing the second solenoid valve 72, the third solenoid valve 73, the fourth solenoid valve 75 and the thermostatic element 4; the fifth solenoid valve 76 is opened. The water heating system only heats tap water of the water supply pipeline 3 through the second water heating device 2 and then outputs hot water for users to use. At this time, the second water heating device 2 may be directly connected to the water point 51 for small hot water consumption such as kitchen, and the hot water outputted from the second water heating device 2 is directly transferred to the water point 51 connected to the second water heating device 2 for use.

Mode three: opening the second solenoid valve 72, the third solenoid valve 73 and the thermostatic element 4; the fourth solenoid valve 75 and the fifth solenoid valve 76 are closed. Tap water in the water supply pipeline 3 does not enter the second water heating device 2, is directly input into the first liner 11 and the second liner 12 of the first water heating device 1 through the second heat exchanger, and is independently supplied with hot water through the first water heating device 1. Alternatively, the booster pump 6 may be activated to relieve water resistance when the first liner 11 is heated.

Mode four: opening the second solenoid valve 72, the fourth solenoid valve 75 and the thermostatic element 4; the third solenoid valve 73 and the fifth solenoid valve 76 are closed. The second water heating device 2 outputs hot water to the first flow passage of the second heat exchanger, preheats tap water of the second flow passage, and inputs preheated water into the first inner container 11 of the first water heating device 1 and the second inlet 42 of the constant temperature element 4. The output port 43 of the constant temperature element 4 outputs the water obtained by mixing the hot water output from the first liner 11 of the first water heating device 1 and the preheated water in the second flow passage to a plurality of water consumption points 51 of the water consumption pipeline 5.

Based on the same principle, the application also discloses a water heating device. The device comprises: a water inlet part and a water outlet part; a first liner 11, wherein a phase change material is arranged in the first liner 11; the first liner 11 is provided with a heating component for heating the phase change material; the first liner 11 is provided with a first heat exchanger 111, and water flowing through the first heat exchanger 111 can exchange heat with the phase change material.

The water inlet part is used for inputting preheated water heated by the heating device; at least a part of the preheated water inputted into the water inlet portion flows into the first heat exchanger 111 or at least a part of the preheated water inputted into the water inlet portion in a predetermined state flows into the first heat exchanger 111; the water outlet part is used for outputting the preheated water heated by the water heating device.

In alternative embodiments, the heating means comprise an electric heating element arranged on the first inner container 11 and extending into the phase change material or a heating tube arranged in the first inner container 11 or on the outer wall of the first inner container 11 for the circulation of a heating medium.

In an alternative embodiment, the heating pipe is a circular pipe, an elliptical pipe or a micro-channel pipe, and the heating medium is hot water supplied by a gas water heating device or an electric water heating device or heating refrigerant supplied by a heat pump device.

In an alternative embodiment, the water heating device further comprises a second liner 12. The first liner 11 comprises a first water inlet and a first water outlet; the second liner 12 includes a second water inlet and a second water outlet; the first water inlet of the first liner 11 is connected with the water inlet part, and the second water outlet of the second liner 12 is connected with the water outlet part; the first water inlet and the first water outlet are communicated with the first heat exchanger 111, the first water inlet is used for inputting water into the first heat exchanger 111, and the first water outlet is used for outputting water heated by the first heat exchanger 111; the second water inlet is communicated with the first water outlet, and water flowing out of the first water outlet flows into the second liner 12 through the second water inlet; the second water outlet is used for outputting water which is reheated by the second liner 12; the first water inlet is for receiving at least a portion of the preheated water.

In an alternative embodiment, the water heating device further comprises a thermostatic element 4, said thermostatic element 4 comprising a first inlet 41, a second inlet 42 and an outlet 43, said first inlet 41 being connected to said second outlet, said second inlet 42 being adapted to input part of said preheated water or tap water, said outlet 43 being adapted to output water mixed after flowing from said first inlet 41 and said second inlet 42 into said thermostatic element 4.

In an alternative embodiment, the water heating device further comprises a diverting element for diverting the incoming preheated water to the first water inlet and the second inlet 42.

In an alternative embodiment, the flow dividing element comprises a three-way joint or a three-way flow distribution valve or at least two solenoid valves or at least two flow regulating valves.

In an alternative embodiment, the water heating device further comprises a second liner 12; the first liner 11 comprises a first water inlet and a first water outlet; the second liner 12 includes a second water inlet and a second water outlet; the first water inlet and the second water inlet are respectively connected with the water inlet part, and the first water outlet and the second water outlet are respectively connected with the water outlet part.

The first water inlet and the first water outlet are communicated with the first heat exchanger 111; the first liner 11 is parallel to the second liner 12, and the preheated water flowing into the first water heating device 1 can flow into the first liner 11 and the second liner 12 through the first water inlet and the second water inlet respectively; the preheated water flowing into the first liner 11 flows out of the first water outlet after being heated, and the preheated water flowing into the second liner 12 flows out of the second water outlet after being heated; the first water inlet is used for receiving at least part of the preheated water under a preset state.

In an alternative embodiment, a diverting element is also included for diverting the preheated water flowing into the first water heating device 1 to the first water inlet and/or the second water inlet.

In an alternative embodiment, the thermostatic element 4 further comprises a thermostatic element 4, said thermostatic element 4 comprising a first inlet 41 for inputting heated water flowing out of said first water outlet and/or said second water outlet, a second inlet 42 for inputting said portion of said preheated water or tap water, and an output 43 for outputting mixed water flowing into said thermostatic element 4 from said first inlet 41 and said second inlet 42.

In an alternative embodiment, the second inlet 42 is connected to the flow dividing element.

In an alternative embodiment, the flow dividing element comprises a three-way joint or a four-way joint or a three-way flow distribution valve or a four-way flow distribution valve or at least two flow regulating valves or at least two solenoid valves.

In an alternative embodiment, the second bladder 12 includes a heating element for heating the water stored in the second bladder 12.

In an alternative embodiment, the water heating device further comprises a thermostatic element 4. The constant temperature element 4 comprises a first inlet 41, a second inlet 42 and an output 43, wherein the first inlet 41 is used for inputting the preheated water after the temperature of the first water heating device 1 rises, the second inlet 42 is used for inputting part of the preheated water or tap water, and the output 43 is used for outputting the water which flows into the constant temperature element 4 from the first inlet 41 and the second inlet 42 and is mixed.

Because the principle of the water heating device for solving the problem is similar to that of the above water heating system, the implementation of the water heating device can be referred to the implementation of the first water heating device 1 in the water heating system, and other technical features are similar to those of the water heating system, and are not repeated here.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. A water heating system, comprising:

a first water heating device and a second water heating device;

2. The water heating system of claim 1, wherein the heating element comprises an electrical heating element disposed on the first liner and extending into the phase change material or a heating tube disposed in or on an outer wall of the first liner through which a heating medium flows.

3. The water heating system according to claim 2, wherein the heating pipe is a round pipe, an oval pipe or a micro-channel pipe, and the heating medium is a heating refrigerant supplied by a gas water heating device or an electric water heating device, or a heat pump device.

4. The water heating system of claim 1, wherein the second water heating device is in communication with a water supply line, and water flowing into the second water heating device from the water supply line is preheated by the second water heating device and then is input into the first water heating device.

5. The water heating system according to claim 1, further comprising a second heat exchanger including a first flow passage and a second flow passage, wherein the liquid flowing into the first flow passage and the second flow passage can exchange heat, the first flow passage is used for circulating a heating medium heated by the second water heating device, and tap water in a water supply pipeline inputted from the second flow passage is preheated by the heating medium and then inputted into the first water heating device.

6. The water heating system of claim 4, wherein the second water heating device is a gas water heating device or an electric water heating device.

7. The water heating system of claim 5, wherein the heating medium comprises water or a refrigerant.

8. The water heating system of claim 5, wherein the second water heating device is a gas water heating device, an electric water heating device, or a heat pump water heating device.

9. The water heating system of claim 1, wherein the first water heating device further comprises a second liner;

the first liner comprises a first water inlet and a first water outlet;

the second liner comprises a second water inlet and a second water outlet;

the preheated water flows at least partially into the first water inlet.

10. The water heating system of claim 9, wherein the first water heating device further comprises a thermostatic element comprising a first inlet connected to the second water outlet, a second inlet for inputting a portion of the preheated water or tap water, and an outlet for outputting water mixed after flowing from the first inlet and the second inlet into the thermostatic element.

11. The water heating system of claim 10, wherein the first water heating device further comprises a diverter element for diverting the preheated water flowing into the first water heating device to the first water inlet and the second inlet.

12. The water heating system according to claim 11, wherein the diverter element comprises a three-way joint or a three-way flow distribution valve or at least two solenoid valves or at least two flow regulating valves.

13. The water heating system of claim 1, wherein the first water heating device further comprises a second liner;

the first liner comprises a first water inlet and a first water outlet;

the second liner comprises a second water inlet and a second water outlet;

14. The water heating system of claim 13, wherein the first water heating device further comprises a diverter element for diverting the preheated water flowing into the first water heating device to the first water inlet and/or the second water inlet.

15. The water heating system of claim 14, wherein the first water heating device further comprises a thermostatic element comprising a first inlet for inputting heated water flowing from the first water outlet and/or the second water outlet, a second inlet for inputting the portion of the preheated water or tap water, and an output for outputting water mixed after flowing into the thermostatic element from the first inlet and the second inlet.

16. The water heating system according to claim 15, wherein the preheated water input to the second inlet is split by the splitting element.

17. The water heating system according to claim 15, wherein the shunt element comprises a three-way joint or a four-way joint or a three-way flow distribution valve or a four-way flow distribution valve or at least two flow regulating valves or at least two solenoid valves.

18. The water heating system according to any one of claims 9-17, wherein,

19. The water heating system according to claim 1, further comprising a flow control device and a bypass line arranged in parallel with the second water heating device, the flow control device being adapted to supply tap water in a water supply line to the second water heating device or the bypass line, water flowing from the bypass line flowing to the first water heating device.

20. The water heating system according to claim 19, wherein the flow control device is provided on the bypass line, the flow control device being a solenoid valve.

21. The water heating system of claim 1, further comprising a thermostatic element;

22. The water heating system of claim 21, wherein the thermostatic element is integrally provided on the first water heating device.

23. The water heating system of claim 1, further comprising a soft water module;

24. The water heating system according to claim 23, wherein,

25. A water heating apparatus, comprising:

a water inlet part and a water outlet part;

the first inner container is provided with a phase change material;

the water outlet part is used for outputting the preheated water heated by the water heating device.

26. The water heating device of claim 25, wherein the heating means comprises an electrical heating element disposed on the first liner and extending into the phase change material or a heating tube disposed in or on an outer wall of the first liner through which a heating medium flows.

27. The water heating apparatus of claim 26, wherein the heating pipe is a round pipe, an oval pipe or a micro-channel pipe, and the heating medium is a heating refrigerant supplied from a gas water heating device or an electric water heating device or a heat pump device.

28. The water heating apparatus of claim 25, further comprising a second liner;

the first liner comprises a first water inlet and a first water outlet;

the second liner comprises a second water inlet and a second water outlet;

29. A water heating apparatus according to claim 28, further comprising a thermostatic element comprising a first inlet connected to the second water outlet, a second inlet for inputting part of the preheated water or tap water, and an outlet for outputting water mixed after flowing into the thermostatic element from the first inlet and the second inlet.

30. The water heating apparatus of claim 29, further comprising a diverter element for diverting the incoming preheated water to the first water inlet and the second inlet.

31. A water heating apparatus according to claim 30, wherein the flow dividing element comprises a three-way joint or a three-way flow distribution valve or at least two solenoid valves or at least two flow regulating valves.

32. The water heating apparatus of claim 25, further comprising a second liner;

the first liner comprises a first water inlet and a first water outlet;

the second liner comprises a second water inlet and a second water outlet;

the first inner container and the second inner container are arranged in parallel, and preheated water flowing into the water heating device can flow into the first inner container and the second inner container through the first water inlet and the second water inlet respectively; the preheated water flowing into the first liner flows out of the first water outlet after being heated, and the preheated water flowing into the second liner flows out of the second water outlet after being heated;

33. The water heating apparatus of claim 32, further comprising a diverter element for diverting the preheated water flowing into the water heating apparatus to the first water inlet and/or the second water inlet.

34. A water heating apparatus according to claim 33, further comprising a thermostatic element comprising a first inlet for inputting heated water flowing from the first water outlet and/or the second water outlet, a second inlet for inputting the portion of the preheated water or tap water, and an output for outputting water mixed after flowing into the thermostatic element from the first inlet and the second inlet.

35. The water heating apparatus of claim 34 wherein the second inlet is connected to the diverter element.

36. A water heating apparatus according to claim 34, wherein the shunt element comprises a three-way or four-way joint or a three-way or four-way flow distribution valve or at least two flow regulating valves or at least two solenoid valves.

37. A water heating apparatus as claimed in any one of claims 28 to 36, wherein,

38. The water heating device of claim 25, further comprising a thermostatic element;

the constant temperature element comprises a first inlet, a second inlet and an output port, wherein the first inlet is used for inputting the preheated water heated by the water heating device, the second inlet is used for inputting part of the preheated water or tap water, and the output port is used for outputting water mixed after flowing into the constant temperature element from the first inlet and the second inlet.