Water heater

Abstract

The utility model relates to the technical field of household appliances, and discloses a water heater which comprises a box body, a first heat exchanger and an electric heating part, and the first heat exchanger is arranged in the box body; the electric heating part is arranged in the box body and located on one side of the first heat exchanger. And external water is supplied into the box body, exchanges heat with the first heat exchanger and / or the electric heating part, and then flows out from the output end of the box body. In the application, the energy consumption required by heating of the first heat exchanger relative to the electric heating part is lower, but the heating efficiency of the electric heating part is higher than that of the first heat exchanger, so that through mutual cooperation of the first heat exchanger and the electric heating part, under the condition of higher water consumption, the supply efficiency of hot water can be guaranteed, and the energy consumption can be reduced.

Description

Technical Field

[0001] The present application relates to the field of household appliance technology, for example, to a water heater. Background Art

[0002] At present, there are many scenarios for the use of hot water in indoor production and life, such as cleaning and heating, etc., to heat the water to a suitable temperature to meet the needs of use; by heating the water in an instant manner, the water temperature can be quickly increased, avoiding excessive losses caused by early heating and continuous insulation.

[0003] In the related technology, there is a multi-speed instant electric water heater, including a heating device, which includes a shell and a hot water outlet. A metal panel is fixedly installed at the middle position of the front end of the shell, and a liquid crystal display screen is arranged on the front end outer surface of the metal panel near the middle position of the bottom end, and an indicator light is arranged on the front end outer surface of the metal panel near the upper side of the liquid crystal display screen, and a switch button is arranged on the other side of the front end outer surface of the metal panel near the lower side of the liquid crystal display screen. The hot water outlet is arranged at a position near one side of the lower end of the shell, and a three-way pipe is arranged at the lower end of the hot water outlet, and the lower end of the three-way pipe is connected to the water outlet pipe, so that water can be heated quickly and instantly to meet the demand for hot water.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] When supplying hot water stably, the water heater consumes a lot of power, which increases the cost of use.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiment of the present disclosure provides a water heater to solve the problem of how to reduce the power consumption of the water heater while stably supplying hot water.

[0009] A water heater comprises: a box, a first heat exchanger and an electric heating unit. The first heat exchanger is arranged in the box; the electric heating unit is arranged in the box and is located on one side of the first heat exchanger; wherein, water from the outside is supplied into the box and exchanges heat with the first heat exchanger and / or the electric heating unit, and then flows out through the output end of the box.

[0010] Optionally, the first heat exchanger comprises: a plurality of heat exchange fins and a refrigerant coil. There is a flow gap between adjacent heat exchange fins; and the refrigerant coil is disposed on the plurality of heat exchange fins.

[0011] Optionally, the first heat exchanger further includes: a shell. A circulation cavity is defined inside the shell, a plurality of heat exchange fins and a refrigerant coil are arranged in the circulation cavity, and a side wall of the shell has a first water inlet and a first water outlet connected to the circulation cavity; wherein external water flows into the circulation cavity through the first water inlet for heat exchange and then flows out through the first water outlet.

[0012] Optionally, the electric heating part comprises: a cylinder and a heating wire. The cylinder defines a heating chamber inside; the heating wire is wound around the outer periphery of the cylinder; wherein the side wall of the cylinder has a second water inlet and a second water outlet connected to the heating chamber, and the first water outlet is connected to the second water inlet.

[0013] Optionally, the electric heating part comprises: a cylinder and a heating wire. The cylinder defines a heating chamber inside; the heating wire is wound around the outer periphery of the cylinder; wherein the side wall of the cylinder has a second water inlet and a second water outlet connected to the heating chamber, and the second water outlet is connected to the first water inlet.

[0014] Optionally, one side of the cylinder is connected to an exhaust valve.

[0015] Optionally, one side of the cylinder is connected to a safety valve.

[0016] Optionally, the water heater further includes: a main pipe, a first branch pipe and a second branch pipe. The main pipe is connected to the second water outlet; the first branch pipe is connected to the main pipe output end; the second branch pipe is also connected to the main pipe output end, so that the hot water flowing out of the main pipe can flow out through the first branch pipe and the second branch pipe respectively.

[0017] Optionally, the water heater further includes: a main pipe, a first branch pipe and a second branch pipe. The main pipe is connected to the first water outlet; the first branch pipe is connected to the main pipe output end; the second branch pipe is also connected to the main pipe output end, so that the hot water flowing out of the main pipe can flow out through the first branch pipe and the second branch pipe respectively.

[0018] Optionally, the water heater further comprises: an expansion tank. The expansion tank is communicated with the main pipe.

[0019] Optionally, the water heater further includes: a second heat exchanger connected to the first heat exchanger to form a refrigerant circulation loop.

[0020] Optionally, the electronic expansion valve is connected between the first heat exchanger and the second heat exchanger, and is located outside the indoor environment where the cabinet is located.

[0021] The water heater provided in the embodiment of the present disclosure can achieve the following technical effects:

[0022] The energy consumption required for heating by the first heat exchanger is lower than that of the electric heating unit, but the heating efficiency of the electric heating unit is higher than that of the first heat exchanger. Therefore, through the cooperation between the first heat exchanger and the electric heating, when the water consumption is large, the hot water supply efficiency can be guaranteed and the energy consumption can be reduced.

[0023] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0025] Figure 1 is a schematic structural diagram of a water heater provided by an embodiment of the present disclosure;

[0026] Figure 2 is a schematic diagram of the internal structure of a water heater provided by an embodiment of the present disclosure;

[0027] Figure 3 is a structural schematic diagram of a box provided by an embodiment of the present disclosure;

[0028] Figure 4 is a structural schematic diagram of a first heat exchanger provided in an embodiment of the present disclosure;

[0029] Figure 5 is a structural schematic diagram of a first heat exchanger and an electric heating unit in communication with each other provided in an embodiment of the present disclosure;

[0030] Figure 6 is an exploded view of a front cover provided by an embodiment of the present disclosure;

[0031] Figure 7 is a schematic diagram of the structure inside another water heater provided by an embodiment of the present disclosure;

[0032] Figure 8 is a schematic structural diagram of another water heater provided by an embodiment of the present disclosure;

[0033] Fig. 9 It is a schematic diagram of the circulation of water and refrigerant when the water heater provided by the embodiment of the present disclosure is in operation.

[0034] Reference numerals:

[0035] 100, box body; 110, top cover plate; 111, right side plate; 112, left side plate; 113, rear side plate; 114, front cover plate; 115, chassis; 116, through hole; 120, first panel; 121, second panel; 122, lining plate; 123, water tray; 124, electric control box; 200, first heat exchanger; 210, heat exchange plate; 300, electric heating unit; 310, cylinder; 410, connecting pipe; 411, connecting pipe; 412, flow meter; 413, exhaust valve; 414, safety valve; 415, main pipe; 416, first branch pipe; 417, second branch pipe; 418, three-way reversing valve; 419, water pump; 420, expansion tank; 500, second heat exchanger; 510, first through pipe; 511, second through pipe; 512, electronic expansion valve. DETAILED DESCRIPTION

[0036] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0037] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0039] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0040] Unless otherwise stated, the term "plurality" means two or more.

[0041] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0042] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0044] Combination Figure 1-3 As shown, the embodiment of the present disclosure provides a water heater, comprising: a housing 100, a first heat exchanger 200 and an electric heating unit 300. The first heat exchanger 200 is disposed in the housing 100; the electric heating unit 300 is disposed in the housing 100 and is located on one side of the first heat exchanger 200; wherein, water from the outside is supplied to the housing 100 and exchanges heat with the first heat exchanger 200 and / or the electric heating unit 300, and then flows out through the output end of the housing 100.

[0045] With the water heater provided in the embodiment of the present disclosure, the energy consumption required for heating by the first heat exchanger 200 is lower than that of the electric heating part 300, but the heating efficiency of the electric heating part 300 is higher than that of the first heat exchanger 200. Therefore, through the cooperation between the first heat exchanger 200 and the electric heating part 300, when the water consumption is large, the hot water supply efficiency can be guaranteed and the energy consumption can be reduced.

[0046] Exemplarily, the first heat exchanger 200 alone exchanges heat for the water in the housing 100, so that the water temperature is increased with lower power consumption. The first heat exchanger 200 is used for the main heat exchange, and the electric heating unit 300 is used for auxiliary heating; or the electric heating unit 300 is used for the main heating, and the first heat exchanger 200 is used for auxiliary heat exchange; in this way, the power consumption will not be high, and it is better adapted to the working conditions with a large amount of hot water consumption. The electric heating unit 300 can also heat the water in the housing 100 alone. If one of the first heat exchanger 200 and the electric heating unit 300 fails, the other can continue to operate to maintain the demand for hot water.

[0047] Optionally, the housing 100 is provided with a plurality of through holes 116. Thus, the through holes 116 facilitate the connection between the housing 100 and external pipes or other equipment, and the connection between the first heat exchanger 200 and the electric heating unit 300 inside the housing 100 and external pipes or other equipment.

[0048] Optionally, the box body 100 includes: a top cover plate 110, a right side plate 111, a left side plate 112, a rear side plate 113, a front cover plate 114 and a bottom plate 115. The left side plate 112, the rear side plate 113, the right side plate 111 and the front cover plate 114 are sequentially connected between the top cover plate 110 and the bottom plate 115. In this way, the shape of the box body 100 is relatively regular.

[0049] Optionally, a plurality of through holes 116 are provided on the chassis 115. In this way, the through holes 116 facilitate the connection between the box 100 and external pipes or other equipment. At the same time, the through holes 116 are concentrated on the chassis 115, reducing the openings in other parts and reducing the processing difficulty of the box 100.

[0050] Optionally, there are multiple first heat exchangers 200. In this way, when there are multiple first heat exchangers 200, the speed of heat exchange for water in the box 100 is enhanced, and the temperature is raised higher in the same time.

[0051] Optionally, there are multiple electric heating units 300. In this way, when there are multiple electric heating units 300, the speed of water heating is accelerated.

[0052] like Figure 4 As shown, optionally, the first heat exchanger 200 includes: a plurality of heat exchange fins 210 and a refrigerant coil. A plurality of heat exchange fins 210 have flow gaps between adjacent heat exchange fins 210; and the refrigerant coil is provided on the plurality of heat exchange fins 210. In this way, the heat exchange fins 210 are heated by the refrigerant, and the heat exchange fins 210 heat the water in the housing 100 to increase the temperature of the water. The water in the housing 100 circulates in the flow gaps between the plurality of heat exchange fins 210, thereby increasing the contact area with the first heat exchanger 200, thereby improving the heat exchange efficiency between the water and the first heat exchanger 200.

[0053] Optionally, the plurality of heat exchange fins 210 are all rectangular. In this way, the shape of the heat exchange fins 210 is more regular, more suitable for arrangement and layout in the box body 100, and reducing the design difficulty.

[0054] Optionally, a plurality of heat exchange fins 210 are evenly arranged. In this way, the heat exchange fins 210 are evenly arranged, and the heat conduction is more uniform.

[0055] In one embodiment, the first heat exchanger 200 further includes: a shell. A circulation cavity is defined inside the shell, and a plurality of heat exchange fins 210 and a refrigerant coil are disposed in the circulation cavity. The side wall of the shell has a first water inlet and a first water outlet connected to the circulation cavity; wherein, water from the outside flows into the circulation cavity through the first water inlet for heat exchange and then flows out through the first water outlet. In this way, water enters the circulation cavity of the shell through the first water inlet, and is heated by the plurality of heat exchange fins 210 to increase the temperature of the water, and then flows out through the first water outlet. By flowing into the circulation cavity, the water exchanges heat with the refrigerant coil and the plurality of heat exchange fins 210, which can improve the heat exchange efficiency of the water.

[0056] In another embodiment, the first heat exchanger 200 further includes: a heat exchange coil. The heat exchange coil is also passed through the plurality of heat exchange fins 210 and is arranged on one side of the refrigerant coil. The input end of the heat exchange coil is the first water inlet, and the output end of the heat exchange coil is the first water outlet. In this way, water enters the heat exchange coil through the first water inlet of the heat exchange coil, and the plurality of heat exchange fins 210 heat the heat exchange coil and the water inside the heat exchange coil. The water flows in the heat exchange coil in the same direction, and the flow rate is relatively stable. The water is continuously heated while flowing in the heat exchange coil, and the temperature rise is more linear and stable.

[0057] In a specific embodiment, the electric heating unit 300 includes: a cylinder 310 and a heating wire. A heating chamber is defined inside the cylinder 310; the heating wire is wound around the outer periphery of the cylinder 310; wherein the side wall of the cylinder 310 has a second water inlet and a second water outlet connected to the heating chamber, and the first water outlet is connected to the second water inlet. In this way, water enters the shell circulation chamber or the heat exchange coil through the first water inlet, the water is heated, and then flows out through the first water outlet, and enters the heating chamber of the cylinder 310 through the second water inlet. The heating wire heats the water to increase the temperature of the water, and the water flows out through the second water outlet. The water is heated for the first time by the first heat exchanger 200, and then supplemented by the heating wire in the cylinder 310 according to the water temperature, thereby maintaining a stable water demand and reducing power consumption.

[0058] Optionally, the water heater further includes: a connecting pipe 410. The connecting pipe 410 extends from one of the through holes 116 to the inside of the housing 100, and one end of the connecting pipe 410 is connected to the first water inlet. In this way, water flows into the circulation cavity of the housing through the connecting pipe 410 and the first water inlet, flows out through the first water outlet, flows into the heating cavity of the cylinder 310 through the second water inlet, and then flows out through the second water outlet. At the same time, it is convenient to connect with external pipes through the connecting pipe 411.

[0059] Optionally, the water heater further includes: a connecting pipe 411. The connecting pipe 411 is used to connect the first water outlet and the second water inlet. In this way, the first water outlet and the second water inlet are connected through the connecting pipe 411, and the pipe connection can adapt to different distances and positions between the shell and the cylinder 310, so that the shell and the cylinder 310 can be arranged in the box 100 more reasonably and flexibly.

[0060] In another specific embodiment, the electric heating unit 300 includes: a cylinder 310 and a heating wire. A heating chamber is defined inside the cylinder 310; the heating wire is wound around the outer periphery of the cylinder 310; wherein the side wall of the cylinder 310 has a second water inlet and a second water outlet connected to the heating chamber, and the second water outlet is connected to the first water inlet. In this way, water enters the heating chamber of the cylinder 310 from the second water inlet, the heating wire heats the water to increase the temperature of the water, and the water then flows out from the second water outlet and enters the circulation chamber or heat exchange coil of the shell through the first water inlet for secondary heating, which can stably supply hot water and reduce power consumption.

[0061] Optionally, the water heater further includes: a connecting pipe 410. The connecting pipe 410 extends from one of the through holes 116 to the inside of the housing 100, and one end of the connecting pipe 410 is connected to the second water inlet. In this way, water flows into the heating chamber of the cylinder 310 through the connecting pipe 410 and the second water inlet, then flows out from the second water outlet, and enters the circulation chamber of the housing or the heat exchange coil through the first water inlet. At the same time, it is more convenient to connect with the external pipe through the connecting pipe 411.

[0062] Optionally, the water heater further includes: a connecting pipe 411. The connecting pipe 411 is used to connect the second water outlet to the first water inlet. In this way, the second water outlet is connected to the first water inlet through the connecting pipe 411, and the pipe connection can adapt to different distances and positions between the shell and the cylinder 310, so that the shell and the cylinder 310 can be arranged in the box 100 more reasonably and flexibly.

[0063] In one embodiment, the water heater further includes: a flow meter 412. The flow meter 412 is connected to the connecting pipe 411. In this way, the flow rate of water in the connecting pipe 411 is measured by the flow meter 412, and the power of the first heat exchanger 200 and the electric heating unit 300 is adjusted according to different water flow rates, so as to reduce power consumption while meeting the demand for hot water.

[0064] like Figure 5As shown, optionally, the front cover 114 includes: a first panel 120, a second panel 121 and an inner lining 122. The second panel 121 is provided at the bottom of the first panel 120; the inner lining 122 is arranged in the box body 100 and is located inside the second panel 121, and the inner lining 122 is connected to the left side panel 112, the right side panel 111 and the bottom plate 115; wherein the first panel 120 and the second panel 121 are rotatably connected to the left side panel 112. In this way, the first panel 120 or the second panel 121 can be rotated and opened on the left side panel 112, so as to facilitate the inspection and maintenance of the components inside the box body 100.

[0065] Optionally, the housing 100 further includes a water receiving tray 123. The water receiving tray 123 is disposed inside the housing 100 and located on the top side of the bottom plate 115. In this way, when leakage occurs in the electric heating unit 300 or the first heat exchanger 200, the water will flow into the water receiving tray 123.

[0066] Optionally, the housing 100 further includes: an electric control box 124 and an electric control component. The electric control box 124 is disposed inside the housing 100 and is located on one side of the first panel 120. The electric control box 124 is connected to the left side panel 112 and the right side panel 111. The electric control component is disposed inside the electric control box 124 and is electrically connected to the first heat exchanger 200 and the electric heating unit 300. In this way, the automatic operation of the water heater is adjusted and controlled by the electric control component, thereby improving the user experience.

[0067] like Figure 6 As shown, optionally, one side of the cylinder 310 is connected to an exhaust valve 413. In this way, since there will be mixed air in the water, after heating, it will gather in the heating chamber, and the excess gas in the heating chamber of the cylinder 310 will be discharged through the exhaust valve 413, thereby improving the use efficiency of the heating chamber.

[0068] Optionally, the exhaust valve 413 is disposed at the upper end of the cylinder 310 .

[0069] Optionally, one side of the cylinder 310 is connected to a safety valve 414. In this way, when the pressure in the cylinder 310 exceeds the set pressure value of the safety valve 414, the safety valve 414 automatically opens to release the pressure, reducing the pressure to prevent damage caused by excessive water pressure.

[0070] Optionally, along the vertical direction, the position where the safety valve 414 is connected to the cylinder 310 is higher than or equal to the height of the second water inlet.

[0071] like Figure 7As shown, in one embodiment, the water heater further includes: a main pipe 415, a first branch pipe 416, and a second branch pipe 417. The main pipe 415 is connected to the second water outlet; the first branch pipe 416 is connected to the output end of the main pipe 415; and the second branch pipe 417 is also connected to the output end of the main pipe 415, so that the hot water flowing out of the main pipe 415 can flow out through the first branch pipe 416 and the second branch pipe 417 respectively. In this way, the heated water flows to the main pipe 415 through the second water outlet, and then through the first branch pipe 416 and the second branch pipe 417, hot water can be provided for space heating and domestic water respectively, realizing two different uses and improving the user experience.

[0072] In another embodiment, the water heater further includes: a main pipe 415, a first branch pipe 416, and a second branch pipe 417. The main pipe 415 is connected to the first water outlet; the first branch pipe 416 is connected to the output end of the main pipe 415; and the second branch pipe 417 is also connected to the output end of the main pipe 415, so that the hot water flowing out of the main pipe 415 can flow out through the first branch pipe 416 and the second branch pipe 417 respectively. In this way, the heated water flows to the main pipe 415 through the first water outlet, and then through the first branch pipe 416 and the second branch pipe 417, hot water can be provided for space heating and domestic water respectively, realizing two different uses and improving the user experience.

[0073] Optionally, the water heater further includes: a three-way reversing valve 418. The three-way reversing valve 418 is used to connect the main pipe 415 with the first branch pipe 416 and the second branch pipe 417. In this way, the water in the main pipe 415 is supplied to the first branch pipe 416 and the second branch pipe 417 under the action of the three-way reversing valve 418, and the three-way reversing valve 418 can also control the switch of the water flow to realize the separate supply of water to the first branch pipe 416 and the second branch pipe 417.

[0074] Optionally, the water heater further includes a water pump 419. The water pump 419 is connected to the main pipe 415. In this way, the water pump 419 provides power for the flow of water, controls the flow of water, and maintains the stability of water pressure.

[0075] Optionally, the water heater further includes an expansion tank 420. The expansion tank 420 is connected to the main pipe 415. In this way, when the water temperature rises, the volume of the water will expand, thereby causing the water pressure to increase. When the water pressure is high, the expansion tank 420 absorbs part of the water to reduce the water pressure, and when the water pressure is low, it releases part of the water to increase the water pressure. The expansion tank 420 prevents excessive fluctuations in the water pressure and maintains the water pressure within a stable pressure range.

[0076] Optionally, the expansion tank 420 is connected between the water pump 419 and the three-way reversing valve 418. In this way, since the water pump 419 controls the switch of water flow, the water starts to flow and stops flowing, and more water pressure changes will occur. Therefore, the expansion tank 420 is used to prevent excessive water pressure fluctuations.

[0077] like Figure 7 and Figure 8 As shown, optionally, the water heater further includes: a second heat exchanger 500. It is connected to the first heat exchanger 200 to form a refrigerant circulation loop. In this way, the refrigerant flows to the first heat exchanger 200 through the second heat exchanger 500, exchanges heat with the first heat exchanger 200, and then flows back to the second heat exchanger 500 through the first heat exchanger 200, and at the same time, the water is heated by the first heat exchanger 200.

[0078] Optionally, the second heat exchanger 500 is located outside the indoor environment where the cabinet 100 is located. In this way, the second heat exchanger 500 is used to exchange heat with the outdoor environment to ensure the normal operation of the first heat exchanger 200 and avoid the influence of the heat exchange of the second heat exchanger 500 on the indoor environment temperature.

[0079] Optionally, the water heater further includes a first through pipe 510 and a second through pipe 511. The first through pipe 510 is used to connect the compressor and the input end of the refrigerant coil, and the second through pipe 511 is used to connect the refrigerant input end of the second heat exchanger 500 and the output end of the refrigerant coil. In this way, the refrigerant in the refrigerant circulation system circulates through the first through pipe 510 and the second through pipe 511.

[0080] Optionally, the electronic expansion valve 512 is connected between the first heat exchanger 200 and the second heat exchanger 500, and is located outside the indoor environment where the cabinet 100 is located. In this way, since the electronic expansion valve 512 generates more noise when in operation, it is set outdoors to reduce the impact of noise on the indoor environment through the barrier of the wall, thereby improving the user experience.

[0081] Optionally, the electronic expansion valve 512 is arranged on the second through pipe 511 and is located outside the indoor environment where the cabinet 100 is located. In this way, since the electronic expansion valve 512 generates more noise when in operation, arranging it outdoors can reduce the impact of the noise on the indoor environment.

[0082] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A water heater, characterized in that: include: Box (100); A first heat exchanger (200) is disposed in the housing (100); The electric heating unit (300) is arranged in the box (100) and is located on one side of the first heat exchanger (200); The external water is supplied into the housing (100) and exchanges heat with the first heat exchanger (200) and / or the electric heating unit (300), and then flows out through the output end of the housing (100).

2. The water heater according to claim 1, characterized in that: The first heat exchanger (200) comprises: A plurality of heat exchange fins (210), with flow gaps between adjacent heat exchange fins (210); The refrigerant coil is passed through a plurality of heat exchange fins (210).

3. The water heater according to claim 2, characterized in that: Also includes: A shell defines a circulation cavity inside, a plurality of heat exchange fins (210) and a refrigerant coil are arranged in the circulation cavity, and a side wall of the shell has a first water inlet and a first water outlet connected to the circulation cavity; Among them, the external water flows into the circulation cavity through the first water inlet for heat exchange and then flows out through the first water outlet.

4. The water heater according to claim 3, characterized in that: The electric heating unit (300) comprises: A cylinder (310) defines a heating chamber therein; A heating wire is wound around the outer circumference of the cylinder (310); The side wall of the cylinder (310) has a second water inlet and a second water outlet connected to the heating chamber, and the first water outlet is connected to the second water inlet or the second water outlet is connected to the first water inlet.

5. The water heater according to claim 4, characterized in that: One side of the cylinder (310) is connected to an exhaust valve (413).

6. The water heater according to claim 4, characterized in that: One side of the cylinder (310) is connected to a safety valve (414).

7. The water heater according to claim 4, characterized in that: Also includes: A main pipe (415) connected to the second water outlet or the first water outlet; A first branch pipe (416) is connected to the output end of the main pipe (415); The second branch pipe (417) is also connected to the output end of the main pipe (415), so that the hot water flowing out of the main pipe (415) can flow out through the first branch pipe (416) and the second branch pipe (417) respectively.

8. The water heater according to claim 7, characterized in that: Also includes: The expansion tank (420) is connected to the main pipe (415).

9. The water heater according to any one of claims 1 to 8, characterized in that: Also includes: The second heat exchanger (500) is connected to the first heat exchanger (200) to form a refrigerant circulation loop.

10. The water heater according to claim 9, characterized in that The electronic expansion valve (512) is connected between the first heat exchanger (200) and the second heat exchanger (500), and is located outside the indoor environment where the cabinet (100) is located.

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