CN107062590B

CN107062590B - Microwave water heater

Info

Publication number: CN107062590B
Application number: CN201710203736.2A
Authority: CN
Inventors: 何慧敏; 余锋; 林跃跃
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Guangdong Witol Vacuum Electronic Manufacture Co Ltd
Priority date: 2017-03-30
Filing date: 2017-03-30
Publication date: 2020-10-02
Anticipated expiration: 2037-03-30
Also published as: CN107062590A

Abstract

The invention discloses a microwave water heater which comprises a body, a microwave heating system and a cooling device, wherein the body comprises an inner container, an electric appliance chamber is formed in the body, a heating chamber is formed in the inner container, the electric appliance chamber is positioned on one side of the inner container, the microwave heating system comprises a magnetron arranged in the electric appliance chamber, the magnetron is used for emitting microwaves to the heating chamber, the cooling device is arranged in the electric appliance chamber and is opposite to the magnetron, and the cooling device is used for forming cold air to cool the magnetron. In the microwave water heater of the embodiment of the invention, the cooling device can form cold air and cool the magnetron, so that when the microwave water heater works, the cooling device can take away heat generated by the magnetron through the cold air, thereby improving the heat dissipation efficiency of the magnetron, ensuring the microwave reflection efficiency and the service life of the magnetron, and eliminating potential safety hazards.

Description

Microwave water heater

Technical Field

The invention relates to the field of household appliances, in particular to a microwave water heater.

Background

In the related art, the magnetron of the microwave water heater has poor heat dissipation effect, so that the microwave reflection efficiency and the service life of the magnetron are reduced, the heating time of the microwave water heater is influenced, and the magnetron is easy to damage when the condition is serious, so that the potential safety hazard of the microwave water heater occurs.

Disclosure of Invention

The present invention has been made to solve at least one of the problems occurring in the related art. Therefore, the invention needs to provide a microwave water heater.

The microwave water heater comprises a body, a microwave heating system and a cooling device, wherein the body comprises an inner container, an electric appliance chamber is formed in the body, a heating chamber is formed in the inner container, the electric appliance chamber is positioned on one side of the inner container, the microwave heating system comprises a magnetron arranged in the electric appliance chamber, the magnetron is used for emitting microwaves to the heating chamber, the cooling device is arranged in the electric appliance chamber and is opposite to the magnetron, and the cooling device is used for forming cold air to cool the magnetron.

In the microwave water heater of the embodiment of the invention, the cooling device can form cold air and cool the magnetron, so that when the microwave water heater works, the cooling device can take away heat generated by the magnetron through the cold air, thereby improving the heat dissipation efficiency of the magnetron, ensuring the microwave reflection efficiency and the service life of the magnetron, and eliminating potential safety hazards.

In one embodiment, the body includes a mounting plate separating the heating chamber and the appliance chamber, the magnetron being mounted on the mounting plate.

In one embodiment, an air inlet and an air outlet are formed in a side wall of the electric appliance chamber, the electric appliance chamber is communicated with the air inlet and the air outlet, the magnetron is located between the air inlet and the air outlet, and the cooling device is used for sucking air through the air inlet to form the cold air and blowing the cold air to the magnetron and then discharging the cold air through the air outlet.

In one embodiment, the air inlet is formed with air inlet holes arranged in an array.

In one embodiment, the air inlet is provided with louvers for directing the air towards the cooling device.

In one embodiment, the microwave heating system includes a power supply device installed in the electric appliance chamber, the power supply device is electrically connected to the magnetron, and the power supply device is configured to supply power to the magnetron to excite the magnetron to emit the microwaves to the heating chamber.

In one embodiment, the cooling device is installed at the top or bottom of the electric appliance chamber, the power supply device includes a transformer assembly electrically connected to the magnetron, the transformer assembly is installed on the installation plate and opposite to the magnetron, and the transformer assembly is located downstream of the cool air with respect to the magnetron.

In one embodiment, the surface of each component in the electric appliance chamber is provided with a waterproof layer, each component comprises the magnetron, the cooling device and the power supply device, and the power supply device is used for supplying power to the magnetron.

In one embodiment, the microwave water heater comprises a heat insulation element, the body comprises a shell, an installation space is formed in the shell, the inner container and the heat insulation element are located in the installation space, and the heat insulation element separates the shell from the inner container.

In one embodiment, the microwave heating system comprises a wave-transparent device mounted on the mounting plate, the wave-transparent device covering the emission end of the magnetron and extending into the heating chamber.

In one embodiment, the microwave water heater includes a seal that seals a gap between the wave-transparent device and the mounting plate.

In one embodiment, the number of the cooling devices is two, and when one of the cooling devices fails to operate, the other cooling device is activated to cool the magnetron.

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

Drawings

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

FIG. 1 is a schematic plan view of a microwave water heater in accordance with an embodiment of the present invention.

FIG. 2 is another schematic plan view of a microwave water heater in accordance with an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a microwave water heater according to an embodiment of the present invention.

Fig. 4 is another schematic structural diagram of a microwave water heater according to an embodiment of the present invention.

Fig. 5 is another schematic structural diagram of a microwave water heater according to an embodiment of the present invention.

Fig. 6 is a schematic view of still another structure of a microwave water heater according to an embodiment of the present invention.

FIG. 7 is a block schematic diagram of a microwave water heater in accordance with an embodiment of the present invention.

Description of the main element symbols:

a microwave water heater 100;

the microwave oven comprises a body 10, an inner container 11, a heating chamber 111, an electric appliance chamber 12a, a mounting plate 13a, a shell 14, a mounting space 141, a microwave heating system 20, a magnetron 21a, a wave-transmitting device 22, a cooling device 30, a fan motor 31, a cooling device 30a, a power supply device 40a, a transformer assembly 41a, a power supply board 42, a filter board 43, a water inlet pipe 50, a water outlet pipe 51, a control panel 60 and an indicator light 61.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 7, a microwave water heater 100 according to an embodiment of the present invention includes a main body 10, a microwave heating system 20, and a cooling device 30.

The body 10 includes a liner 11. An appliance chamber 12 is formed in the body 10. The inner container 11 is formed with a heating chamber 111. The electric appliance chamber 12 is located at one side of the inner container 11. The microwave heating system 20 includes a magnetron 21 mounted within the appliance chamber 12. The magnetron 21 is used to emit microwaves (m in fig. 3 indicates the emitted microwaves) to the heating chamber 111. The cooling device 30 is installed in the electric chamber 12 to be opposite to the magnetron 21. The cooling device 30 is used to form a cool air to cool the magnetron 21.

In the microwave water heater 100 according to the embodiment of the present invention, since the cooling device 30 can form cold air and cool the magnetron 21, when the microwave water heater 100 is in operation, the cooling device 30 can take away heat generated by the magnetron 21 through the cold air, so that the heat dissipation efficiency of the magnetron 21 is improved, the microwave reflection efficiency and the service life of the magnetron 21 are ensured, and meanwhile, potential safety hazards can be eliminated.

The number of the inner containers 11 disposed in the body 10 may be set according to specific situations, for example, the number of the inner containers 11 may be 1 or 2. The heating mode in the inner container 11 can be kept consistent. The microwave heating system 20 may be a single set of microwave heating system or a double set of microwave heating system, and may be set according to specific situations. For example, when the microwave water heater 100 includes two inner containers 11, the two inner containers 11 may be disposed on two sides of the electric appliance chamber 12, and then a double microwave heating system is disposed in the electric appliance chamber 12, and the two opposite magnetrons 21 respectively heat the corresponding heating chambers 111.

In one embodiment, the inner bladder 11 includes a mounting plate 13. The mounting plate 13 separates the heating chamber 111 and the appliance compartment 12. The magnetron 21 is mounted on the mounting plate 13.

In this way, the mounting plate 13 is provided to facilitate mounting of the magnetron 21 while avoiding interference between the heating chamber 111 and the appliance chamber 12.

Specifically, in the embodiment of the present invention, the mounting plate 13 is one side plate of the inner container 11, and is detachably mounted on the inner container 11. When the magnetron 21 needs to be installed, the magnetron 21 can be installed on the installation plate 13 and then installed together with other side plates of the inner container 11. Furthermore, a sealing element (not shown) such as a silicone ring may be disposed at a connection between the mounting plate 13 and the other side plate of the inner container 11 to improve the sealing effect of the inner container 11.

In one embodiment, the mounting plate 13 is a one-piece structure. Therefore, the structure is simple and the manufacture is convenient.

It will be appreciated that the magnetron 21 may be mounted on the upper, lower, left or right side of the mounting plate 13, as the case may be. In one example, the magnetron 21 is mounted on the mounting plate 13, and the mounting position of the magnetron 21 is horizontal to a wall mount (not shown) of the microwave water heater 100, that is, the magnetron 21 is disposed along a length direction (as shown in an X-axis direction in fig. 3) of the microwave water heater 100, wherein the wall mount is used for mounting the microwave water heater 100 on a wall of a bathroom. The magnetron 21 heats the heating chamber 111 more efficiently. In one embodiment, the side wall of the electrical compartment 12 is provided with an air inlet (not shown) and an air outlet (not shown). The electric appliance chamber 12 is communicated with the air inlet and the air outlet. The magnetron 21 is positioned between the air inlet and the air outlet. The cooling device 30 is used for sucking air through the air inlet to form cold air, blowing the cold air to the magnetron 21 and then discharging the cold air from the air outlet.

In this way, the electric chamber 12 and the outside can form the inlet and outlet circulation wind, so that the heat generated by the magnetron 21 can be timely taken out of the electric chamber 12 by the circulation wind, and the magnetron 21 can be sufficiently cooled.

It should be noted that the opening positions of the air inlet and the air outlet can be set according to specific situations.

In one embodiment, the air inlet is formed with air inlet holes (not shown) arranged in an array.

Therefore, the uniformity of air inlet of the air inlet can be ensured, and substances such as external water vapor or impurities are not easy to enter the electric appliance chamber 12 through the air inlet.

In the present example, the microwave water heater 100 is installed in the bathroom, such that the air inlets are formed in an array arrangement at the air inlets, so that the moisture in the bathroom is not easy to enter the electric appliance chamber 12 through the air inlets, thereby ensuring the dryness of the electric appliance chamber 12.

In one embodiment, the air intake is provided with louvers (not shown). The louvers serve to direct air to the cooling device 30.

Thus, the air can be more smoothly blown toward the cooling device 30 by the guide function of the louver, thereby ensuring an improvement in the cooling effect of the cooling device 30. Meanwhile, the moisture entering the electric room 12 can be reduced.

In one embodiment, microwave heating system 20 includes a power supply device 40. The power supply device 40 is installed in the appliance room 12. The power supply device 40 is electrically connected to the magnetron 21. The power supply device 40 is used to supply power to the magnetron 21 to excite the magnetron 21 to emit microwaves to the heating chamber 111.

In this way, the electric appliance chamber 12 has a protective effect on the power supply device 40, so that substances such as dust or moisture from the outside are not easily introduced into the power supply device 40. Meanwhile, because the power supply device 40 and the magnetron 21 are both arranged in the electric appliance chamber 12, the distance between the power supply device 40 and the magnetron 21 is short, so that the arrangement of electric connection between the power supply device 40 and the magnetron 21 is convenient, and the power supply device 40 can be cooled by cold air formed by the cooling device 30.

Referring to fig. 3 and 4, in one embodiment, the cooling device 30 is mounted on the top of the electric appliance room 12. The power supply device 40 includes a transformer assembly 41. The transformer assembly 41 is electrically connected to the magnetron 21. The transformer assembly 41 is mounted on the mounting plate 13 opposite the magnetron 21. The transformer assembly 41 is located downstream of the cool air with respect to the magnetron 21.

Thus, the cold air generated by the cooling device 30 can cool the magnetron 21 and the transformer assembly 41 from top to bottom, so that the cold air can take away the heat of the magnetron 21 and the transformer assembly 41 at the same time, thereby improving the heat dissipation efficiency of the power supply device 40 and ensuring the service life of the transformer assembly 41.

Specifically, in some embodiments, the magnetron 21 and the transformer assembly 41 are located between the air inlet and the air outlet. After the cooling device 30 sucks air through the air inlet and forms cold air, the cold air can be blown to the magnetron 21 and the transformer assembly 41 in sequence, takes away heat of the magnetron 21 and the transformer assembly 41, and is then blown out through the air outlet, and the flowing direction of the cold air is shown by a dotted arrow in fig. 3. Thus, the cold air flows from top to bottom, the flow is smoother,

it should be noted that "top" and "downstream" refer to the position of the microwave water heater 100 during normal use, such as the position shown in fig. 3.

Referring to fig. 5 and 6, in one embodiment, the cooling device 30a is installed at the bottom of the electric appliance room 12 a. The power supply device 40a includes a transformer assembly 41 a. The transformer assembly 41a is electrically connected to the magnetron 21 a. The transformer assembly 41a is mounted on the mounting plate 13a and is opposed to the magnetron 21 a. The transformer assembly 41a is located downstream of the cool air with respect to the magnetron 21 a.

Thus, the cold air generated by the cooling device 30a can cool the magnetron 21a and the transformer assembly 41a from bottom to top, and the cold air can take away the heat of the magnetron 21a and the transformer assembly 41a at the same time, thereby improving the heat dissipation efficiency of the power supply device 40a and ensuring the service life of the transformer assembly 41 a.

Specifically, in some embodiments, the magnetron 21a and the transformer assembly 41a are located between the air inlet and the air outlet. After the cooling device 30a sucks air through the air inlet and forms cold air, the cold air can be blown to the magnetron 21a and the transformer assembly 41a in sequence, takes away heat of the magnetron 21a and the transformer assembly 41a, and then is blown out from the air outlet, and the flowing direction of the cold air is shown by a dotted arrow in fig. 5. Therefore, cold air flows from bottom to top, and water vapor or ash layer and other substances are not easy to enter the electric appliance chamber 12a through the air inlet.

It should be noted that "bottom" and "downstream" refer to the position of the microwave water heater during normal use, such as the position shown in fig. 5.

In one embodiment, the surfaces of the components in the electric chamber 12 are formed with a waterproof layer (not shown), and the components include the magnetron 21, the cooling device 30, and the power supply device 40. The power supply device 40 is used to supply power to the magnetron 21.

Therefore, the waterproof layer can effectively prevent water vapor from contacting with components in the electric appliance chamber 12, and the use safety of the components in the electric appliance chamber 12 is further ensured.

In the present example, the power supply device 40 further includes a power supply board 42 and a filter board 43. The power board 42 is electrically connected to the transformer assembly 41 and the filter board 43. Waterproof layers are formed on the surfaces of the transformer assembly 41, the power board 42 and the filter board 43. The filter plate 43 is used to filter the wave to eliminate the interference of the noise to the magnetron 21. The transformer assembly 41 includes a transformer, a capacitor, and a diode.

In other embodiments, the power supply device may further include a frequency converter. The frequency converter is electrically connected with the magnetron, and a waterproof layer is also formed on the surface of the frequency converter.

In one embodiment, the microwave electric water heater 100 includes a desiccant. A desiccant is disposed within the appliance chamber 12. In this manner, the desiccant may absorb moisture within the appliance chamber 12, thereby further ensuring dryness within the appliance chamber 12.

In one embodiment, the waterproof layer includes waterproof glue, and the waterproof glue is coated on the surface of the component. Therefore, the waterproof glue can also improve the corrosion resistance and the high temperature resistance of components.

In one embodiment, the microwave water heater 100 includes an insulating element (not shown). The body 10 includes a housing 14. The housing 14 has a mounting space 141 formed therein. The inner container 11 and the insulating member are located in the installation space 141. The insulating element separates the outer shell 14 from the inner container 11.

Thus, the heat insulation element can effectively prevent the heat in the inner container 11 from losing, thereby ensuring the heating effect of the microwave water heater 100.

In one example, the insulating element includes a foaming agent. Therefore, the heat insulation element has better heat insulation effect and certain sound insulation effect, thereby reducing the noise of the microwave water heater 100 during operation.

In one embodiment, microwave heating system 20 includes a wave-transparent device 22 mounted on mounting plate 13. The wave-transparent device 22 covers the emission end of the magnetron 21 and extends into the heating chamber 111.

Thus, the heating efficiency is high, and the structure is simple.

In some examples, the wave-transparent device 22 is constructed of a non-metallic material, such as glass or ceramic.

In one embodiment, the microwave water heater 100 includes a seal (not shown). The seal seals the gap between the wave-transparent device 22 and the mounting plate 13.

Thus, the sealing effect between the wave-transmitting device 22 and the mounting plate 13 can be ensured, and water in the heating chamber 111 can be prevented from leaking.

In some examples, the seal is made of a silicone material or a rubber material.

In one embodiment, the microwave water heater 100 includes a water inlet pipe 50 and a water outlet pipe 51. The water inlet pipe 50 and the water outlet pipe 51 are arranged on the same side plate of the inner container 11. The water inlet pipe 50 penetrates through the side plate of the inner container 11 and extends into the heating chamber 111. The water outlet pipe 51 penetrates through the side plate of the inner container 11 and extends into the heating chamber 111. The length of the water outlet pipe 51 extending into the heating chamber 111 is greater than the length of the water inlet pipe 50 extending into the heating chamber 111. The water inlet pipe 50 is positioned between the water outlet pipe 51 and the magnetron 21.

In this way, the heating chamber 111 can be heated by directly feeding water through the water inlet pipe 50 and discharging water through the water outlet pipe 51 for use. And because the length that outlet pipe 51 stretches into heating chamber 111 is longer, so can make into water separately with the play water, thereby guarantee the temperature of play water. Meanwhile, since the water inlet pipe 50 is located between the water outlet pipe 51 and the magnetron 21, it is ensured that the water entering the heating chamber 111 can be heated in time, so as to ensure the uniformity of the temperature of the water in the heating chamber 111.

In one embodiment, the microwave water heater 100 includes a control panel 60. The control panel 60 is fixed on the surface of the housing 14. The control panel 60 is electrically connected to the microwave heating system 20 and the cooling device 30. The control panel 60 includes an indicator light 61.

Specifically, in the embodiment of the present invention, the cooling device 30 includes the fan motor 31. When the microwave water heater 100 is started, the magnetron 21 and the transformer assembly 41 both generate high heat, and then the control panel 60 controls the fan motor 31 to operate to form cold air, and the cold air can directly blow to the magnetron 21 and the transformer assembly 41 to take away the heat.

When the cooling device 30 is in the above-described normal operating state, the control panel 60 controls the indicator lamp 61 to display blue. When the cooling device 30 fails and the magnetron 21 and the transformer assembly 41 cannot be effectively cooled, the control panel 60 controls the indicator lamp 61 to display red color for indication. Therefore, the user can check and repair the fault conveniently in time.

In one example, the microwave water heater 100 includes two cooling devices 30. The two cooling devices 30 are used and stand-by, i.e. one of the cooling devices 30 is operating normally and the other is in stand-by mode. The control panel 60 includes keys (not shown). The keys are connected to a backup cooling device 30. When the magnetron 21 and the transformer assembly 41 cannot be effectively radiated when the cooling device 30 in normal operation fails, the magnetron 21 and the transformer assembly 41 can be radiated by pressing a button to start the cooling device 30 in a standby state.

It should be noted that the cooling device 30 in normal operation is disposed opposite to the magnetron 21 and the transformer assembly 41, and the standby cooling device 30 is spaced apart from the cooling device 30 in normal operation and does not affect each other, and of course, the cooling device 30 in normal operation has better cooling effect on the magnetron 21 and the transformer assembly 41 than the standby cooling device 30.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A microwave water heater, comprising:

the heating device comprises a body, wherein the body comprises an inner container, an electric appliance chamber is formed in the body, a heating cavity is formed in the inner container, the electric appliance chamber is positioned on one side of the inner container, the inner container comprises a mounting plate, the mounting plate is a side plate of the inner container, the mounting plate separates the heating cavity from the electric appliance chamber, an air inlet and an air outlet which are communicated with the outside are formed in the side wall of the electric appliance chamber, and the electric appliance chamber is communicated with the air inlet and the air outlet;

the microwave heating system comprises a magnetron and a power supply device, wherein the magnetron and the power supply device are installed in the electric appliance chamber, the power supply device is used for supplying power to the magnetron to excite the magnetron to emit microwaves to the heating chamber, the power supply device comprises a transformer assembly, a power panel and a filter panel, the power panel is electrically connected with the transformer assembly and the filter panel, the transformer assembly is electrically connected with the magnetron, and the magnetron is installed on the installation plate;

the cooling device is installed in the electric appliance chamber and opposite to the magnetron, the transformer assembly is installed on the installation plate and opposite to the magnetron, the magnetron and the transformer assembly are located between the air inlet and the air outlet, and the cooling device is used for sucking air through the air inlet to form cold air and blowing the cold air to the magnetron and the transformer assembly in sequence and then discharging the cold air to the outside of the electric appliance chamber through the air outlet.

2. The microwave water heater of claim 1, wherein the air inlet is formed with air inlet holes arranged in an array.

3. A microwave water heater according to claim 1, wherein the air inlet is provided with louvers for directing the air towards the cooling device.

4. A microwave water heater according to claim 1, wherein said cooling means is mounted on the top or bottom of said appliance compartment.

5. The microwave water heater according to claim 1, wherein a waterproof layer is formed on surfaces of components in the electric appliance chamber, the components including the magnetron, the cooling device and the power supply device.

6. The microwave water heater of claim 1, wherein the microwave water heater includes a thermal insulation element, the body includes a housing, a mounting space is formed in the housing, the inner container and the thermal insulation element are located in the mounting space, and the thermal insulation element separates the housing from the inner container.

7. A microwave water heater according to claim 1, wherein said microwave heating system includes a wave-transparent device mounted on said mounting plate, said wave-transparent device housing an emitting end of said magnetron and extending into said heating chamber.

8. A microwave water heater according to claim 7, including a seal that seals a gap between the wave-transparent device and the mounting plate.

9. A microwave water heater according to claim 1 wherein the number of said cooling means is two, and when one of said cooling means fails, the other of said cooling means is activated to cool said magnetron.