Heating device and steam oven

Abstract

The present invention discloses a heating device and a steam oven. The heating device includes a steam generating assembly and a fan assembly. The steam generating assembly has a heating element, and a water channel for generating steam is formed in the heating element. The fan assembly is used to drive the air heated by the heating element to form a hot air flow. The heating element of the steam generating assembly can heat the water entering the water channel to make it steam, and can also heat the surrounding air. The fan assembly drives the air heated by the heating element to form a hot air flow. Through the joint action of the steam generating assembly and the fan assembly, the hot air flow and high-temperature steam can heat the food at the same time. The structure is simple, the cost is low, and the cooking effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliances, and in particular to a heating device and a steam oven. Background Art

[0002] A steam oven is a cooking device that uses heating tubes to generate heat and a steam generator to produce steam, thereby raising the temperature of the oven cavity and heating food. Since it can maintain both moisture and nutrients in food, it is gaining more and more attention from consumers.

[0003] Currently, the heating systems of steam ovens mainly include a hot air convection system and a steam generation system, which work independently of each other and are relatively expensive. Due to power limitations, the two heating systems cannot work at the same time, affecting the heating performance. As a result, the steam oven has the disadvantages of high cost and poor cooking effect. Summary of the invention

[0004] The embodiments of the present invention provide a heating device and a steam oven, which are used to solve the problems that the heating system of the existing steam oven has high cost and poor heating performance, resulting in high cost of the steam oven and poor cooking effect.

[0005] To this end, according to a first aspect, an embodiment provides a heating device, comprising:

[0006] A steam generating assembly having a heating element, wherein a water channel for generating steam is formed in the heating element; and

[0007] The fan assembly is used to drive the air heated by the heating element to form a hot air flow.

[0008] In some embodiments of the heating device, the steam generating assembly is annular as a whole, and the fan assembly is located on one side of the steam generating assembly and is coaxially arranged with the steam generating assembly.

[0009] In some embodiments of the heating device, the fan assembly includes a motor and fan blades fixed to a rotating shaft of the motor.

[0010] In some embodiments of the heating device, the steam generating assembly further includes a temperature sensor, which is mounted on the heating element and is used to detect the temperature of the heating element.

[0011] In some embodiments of the heating device, the heating body includes a heating element, a water transport pad and a heat storage body, the water transport pad and the heat storage body are both annular plates, the water transport pad is clamped between the two heat storage bodies, the water channel is arranged on the water transport pad, the heat storage body is provided with a water inlet and a steam outlet connected to the water channel, and the direction of the steam outlet is the same as the blowing direction of the fan assembly, and the heating element is fixed on the heat storage body for heating the heat storage body.

[0012] In some embodiments of the heating device, the water channel is arranged along the circumference of the water transport pad, and the water channel includes a main water channel, a secondary water channel connected to one end of the main water channel, and a water storage channel arranged on one side of the main water channel and connected to the main water channel.

[0013] In some embodiments of the heating device, the width of the primary water channel is greater than the width of the secondary water channel.

[0014] In some embodiments of the heating device, the heating element is an arc-shaped electric heating rod arranged along the circumference of the heat storage body.

[0015] In some embodiments of the heating device, the water inlet corresponds to an end of the main water channel away from the secondary water channel, and the steam outlet corresponds to an end of the secondary water channel away from the main water channel.

[0016] In some embodiments of the heating device, the steam generating assembly further includes a water inlet nozzle and a steam exhaust pipe, and the water inlet nozzle and the steam exhaust pipe are respectively installed on the water inlet and the steam outlet.

[0017] According to a second aspect, an embodiment provides a steam oven, comprising the heating device according to the first aspect of the present invention.

[0018] In some embodiments of the steam oven, the steam oven further comprises:

[0019] A box body, a steaming and baking cavity is formed inside, the heating device is installed on the box body, and is used to provide steam and hot air flow to the steaming and baking cavity, and a food taking and placing opening communicating with the steaming and baking cavity is provided on one side of the box body;

[0020] A box door, installed on the food access opening, used to open and close the food access opening;

[0021] a water supply system for providing water to the waterway; and

[0022] A control circuit is used to control the heating device and the water supply system.

[0023] In some embodiments of the steam oven, the box body includes a cavity, an air guide hood and a heat insulation board, one side of the cavity is open to form the food access port, the side of the cavity opposite to the food access port serves as a back plate, the air guide hood and the heat insulation board are respectively installed on the inner and outer sides of the back plate, a heating cavity is formed between the air guide hood and the back plate, the part of the cavity located between the air guide hood and the food access port forms the steaming and baking cavity, the steam generating assembly is installed in the heating cavity, the air guide hood is provided with a steam inlet hole and a ventilation hole, the steam inlet hole is used to allow the steam generated by the heating element to enter the steaming and baking cavity, the fan assembly is installed on the insulation board, and is used to drive the hot air in the heating cavity into the steaming and baking cavity through the ventilation hole, and to make the hot air form a circulating hot air flow between the steaming and baking cavity and the heating cavity.

[0024] In some embodiments of the steam oven, the water supply system includes a water tank, a driving device and a water supply pipe, one end of the water supply pipe is connected to the water tank, and the other end is connected to the water channel, and the driving device is installed on the water supply pipe to deliver the water in the water tank into the water channel.

[0025] Implementing the embodiments of the present invention will have the following beneficial effects:

[0026] The heating element of the steam generating assembly can heat the water entering the waterway to turn it into steam, and at the same time can heat the surrounding air. The fan assembly drives the air heated by the heating element to form a hot air flow. Through the joint action of the steam generating assembly and the fan assembly, the hot air flow and high-temperature steam can heat the food at the same time. The structure is simple, the cost is low, and the cooking effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] in:

[0029] Figure 1 is a schematic diagram of the overall structure of a heating device shown in one embodiment of the present invention;

[0030] Figure 2 is an exploded view of a steam generating assembly according to an embodiment of the present invention;

[0031] Figure 3 is a side view of a steam generating assembly according to an embodiment of the present invention;

[0032] Figure 4 yes Figure 3 AA rotated section view;

[0033] Figure 5 It is a schematic diagram of the structure of a water transport pad of a heating element shown in one embodiment of the present invention;

[0034] Figure 6 is a schematic diagram of the overall structure of a steam oven shown in one embodiment of the present invention;

[0035] Figure 7 is an exploded view of a steam oven according to an embodiment of the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the air guide cover of the box body shown in one embodiment of the present invention;

[0037] Fig. 9 yes Figure 6 A transverse cross-sectional view of

[0038] Fig.10 It is a partial cross-sectional view of a steam oven shown in one embodiment of the present invention.

[0039] Description of main component symbols:

[0040] 100-steam generating assembly; 101-heating element; 102-water transport pad; 1021-water channel; 10211-main water channel; 10212-secondary water channel; 10213-water storage channel; 103-heat storage body; 1031-water inlet; 1032-steam outlet; 1033-connecting part; 104-temperature sensor; 105-water inlet nozzle; 106-exhaust pipe;

[0041] 200-fan assembly; 201-motor; 202-fan blades;

[0042] 300-box; 301-cavity; 3011-rear plate; 302-air guide cover; 3021-steam inlet hole; 3022-ventilation hole; 30221-air inlet hole; 30222-air outlet hole; 303-heat insulation board;

[0043] 400-Box door;

[0044] 500-water supply system; 501-water storage tank; 502-water supply pipe; 503-driving device, 504-connecting parts;

[0045] 600-steaming and baking chamber;

[0046] 700 - Heating chamber. DETAILED DESCRIPTION

[0047] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0048] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0050] The embodiment of the present invention provides a heating device capable of generating high-temperature steam and hot air flow, such as Figure 1 As shown, the heating device includes a steam generating component 100 and a fan component 200 .

[0051] like Figure 2 As shown, the steam generating assembly 100 has a heating element, and a water channel 1021 for generating steam is formed in the heating element. Specifically, the water entering the water channel 1021 is heated by the heating element, and the water changes from liquid to vapor to form high-temperature steam.

[0052] like Figure 1 As shown, the fan assembly 200 is used to drive the air heated by the heating element to form a hot air flow. Specifically, the fan assembly 200 includes a motor 201 and a fan blade 202 fixed to the rotating shaft of the motor 201. The fan blade 202 drives the air heated by the heating element to flow to form a hot air flow under the rotation of the motor 201.

[0053] In the embodiment of the present invention, the heating element of the steam generating component 100 can heat the water entering the water channel 1021 to turn it into high-temperature steam, and can also heat the surrounding air. The fan component 200 drives the air heated by the heating element to form a hot air flow. Through the joint action of the steam generating component 100 and the fan component 200, the hot air flow and high-temperature steam can heat the food at the same time. The structure is simple, the cost is low, and the heating effect is good.

[0054] In a specific embodiment, Figure 1 and Figure 3 As shown, the steam generating assembly 100 is annular as a whole, and the fan assembly 200 is located on one side of the steam generating assembly 100 and is coaxially arranged with the steam generating assembly 100 .

[0055] In the embodiment of the present invention, the steam generating assembly 100 is annular as a whole. When the heating device is installed, the fan blades 202 of the fan assembly 200 can be arranged in the annular area, so that the fan blades 202 can drive the air heated by the heating element to form a hot air flow, and can also save installation space, which is convenient for the installation and arrangement of the heating device.

[0056] In some embodiments, Figure 2-3 As shown, the steam generating assembly 100 further includes a temperature sensor 104, which is mounted on the heating element and is used to detect the temperature of the heating element.

[0057] In the embodiment of the present invention, the temperature sensor 104 is provided to facilitate real-time monitoring of the temperature of the heating element, thereby ensuring that the heating element operates within a suitable temperature range and preventing the heating element from being too high or too low in temperature and affecting the normal operation of the steam generating assembly 100 .

[0058] In a further specific embodiment, Figure 2-4 As shown, the heating body includes a heating element 101, a water transport pad 102 and a heat storage body 103. The water transport pad 102 and the heat storage body 103 are both annular plates. The water transport pad 102 is clamped between the two heat storage bodies 103. The water channel 1021 is arranged on the water transport pad 102. The heat storage body 103 is provided with a water inlet 1031 and a steam outlet 1032 connected to the water channel 1021, and the direction of the steam outlet 1032 is the same as the blowing direction of the fan assembly 200. The heating element 101 is fixed on the heat storage body 103 for heating the heat storage body 103.

[0059] Specifically, the water transport pad 102 can be made of stainless steel or aluminum alloy. When the power of the heating element 101 is 1000-2000W, the thickness of the water transport pad 102 is selected to be 0.3-0.8mm to ensure that the water entering the water channel 1021 forms a fine water film, which is convenient for being quickly heated by the heat storage body 103 to form steam. The heat storage body 103 can be made of aluminum alloy with higher specific heat capacity and the thickness can be 3mm. The inner and outer edges of the heat storage body 103 are both provided with connecting parts 1033. Optionally, the connecting part 1033 is a lug integrally formed with the heat storage body 103, and the lug is provided with a connecting hole. During production, one heat storage body 103, the water transport pad 102 and another heat storage body 103 are stacked in sequence, and the connecting holes on the lugs of the two heat storage bodies 103 are overlapped. Then, screws, bolts or other fasteners are used to pass through the connecting holes on the lugs of the two heat storage bodies 103 to tightly clamp the water transport pad 102 between the two heat storage bodies 103.

[0060] When the heating element is working, Figure 4 As shown, the two heat storage bodies 103 absorb heat and their temperatures rise under the heating of the heating element 101. When the temperature rises to 120-150°C, water enters the water channel 1021 on the water transport pad 102 through the water inlet 1031, is heated by the two heat storage bodies 103, and is converted into high-temperature steam and then ejected from the steam outlet 1032.

[0061] In the embodiment of the present invention, the water transport pad 102 with the water channel 1021 is sandwiched between the two heat storage bodies 103. The water in the water channel 1021 is heated by the two heat storage bodies 103 so that the water can be quickly heated and converted into high-temperature steam, ensuring that the high-temperature steam is generated quickly and stably.

[0062] In a further specific embodiment, Figure 2 and Figure 5 As shown, the water channel 1021 is arranged along the circumference of the water transport pad 102, and the water channel 1021 includes a main water channel 10211, a secondary water channel 10212 connected to one end of the main water channel 10211, and a water storage channel 10213 arranged on one side of the main water channel 10211 and connected to the main water channel 10211. The width of the main water channel 10211 is greater than that of the secondary water channel 10212.

[0063] It should be noted that the purpose of the water storage channel 10213 is to store water that does not reach the vaporization temperature when it enters the water channel. The water storage channel 10213 can not only be set next to the main water channel 10211 and connected with the main water channel 10211, but also be set next to the secondary water channel 10212 and connected with the secondary water channel 10212. Of course, water storage channels 10213 can also be set next to both the main water channel 10211 and the secondary water channel 10212. The number of water storage channels 10213 can also be set in multiples to store water that does not reach the vaporization temperature, so that it continues to absorb heat and reaches vaporization and then is ejected from the steam outlet 1032 to reduce the water content of the steam. It is understandable that the water channel 1021 is not limited to one main water channel 10211 and one secondary water channel 10212. The water channel 1021 can be set to more levels according to the size of the water transport pad 102, and the width decreases successively, so as to heat the water in multiple levels. Since the width decreases successively, it can boost the steam, so that the high-temperature steam is finally ejected from the steam outlet 1032 at a high speed.

[0064] In the embodiment of the present invention, by arranging the water channel 1021 along the circumference of the water transport pad 102, the length of the water channel 1021 can be increased, so that the water in the water channel 1021 can be fully heated by the heat storage body 103. The water channel 1021 includes a main water channel 10211, a secondary water channel 10212 whose width is smaller than the main water channel 10211, and a water storage channel 10213, so that the water entering the water channel 1021 can be fully heated, further improving the steam generation speed and reducing the water content of the steam.

[0065] In some embodiments, Figure 2-4 As shown, the heating element 101 is an annular electric heating rod arranged along the circumference of the heat storage body 103, wherein the annular electric heating rod can be a stainless steel electric heating rod or a ceramic electric heating rod. Preferably, the annular electric heating rod can be tightly fixed on the heat storage body 103 by brazing.

[0066] By configuring the heating element 101 to be ring-shaped, the heat storage body 103 in the form of a ring-shaped plate can be heated quickly and evenly.

[0067] In some embodiments, Figure 2-4 As shown, the water inlet 1031 corresponds to an end of the main water channel 10211 away from the secondary water channel 10212 , and the steam outlet 1032 corresponds to an end of the secondary water channel 10212 away from the main water channel 10211 .

[0068] By arranging the water inlet 1031 and the steam outlet 1032 to correspond respectively to the end of the main water channel 10211 away from the secondary water channel 10212 and the end of the secondary water channel 10212 away from the main water channel 10211, the flow path of the water in the water channel 1021 from the water inlet 1031 to the steam outlet 1032 is extended, further ensuring that the water entering the water channel 1021 is fully heated.

[0069] In some embodiments, Figure 2-4 As shown, the steam generating assembly 100 further includes a water inlet nozzle 105 and a steam exhaust pipe 106 , and the water inlet nozzle 105 and the steam exhaust pipe 106 are respectively installed on the water inlet 1031 and the steam outlet 1032 .

[0070] Specifically, the inner wall of the water inlet 1031 is provided with an internal thread, the water inlet nozzle 105 is a hollow cylinder, one end of which is provided with an external thread, and the other end is conical, and the water inlet nozzle 105 is installed on the water inlet 1031 through a thread, and the water inlet nozzle 105 is provided to facilitate the connection of a water supply pipe to supply water to the waterway 1021. The inner wall of the steam outlet 1032 is provided with an external thread, and the steam spray pipe is a hollow cylinder, one end of which is provided with an external thread, and the steam spray pipe is installed on the steam outlet 1032 through a thread, and the steam spray pipe is provided to facilitate the steam sprayed from the steam outlet 1032 to be guided into the steaming and baking chamber.

[0071] The embodiment of the present invention also provides a steam oven, such as Figure 6 As shown, the food can be heated, and the steam oven comprises the above-mentioned heating device.

[0072] It can be understood that since the above-mentioned heating device heats the food simultaneously through the joint action of the steam generating component 100 and the fan component 200, the hot air flow and high-temperature steam have the advantages of simple structure, low cost and good heating effect. The steam oven also has the advantages of simple structure, low cost and good cooking effect.

[0073] like Figure 7 As shown, the steam oven further includes a cabinet body 300, a cabinet door 400, a water supply system 500 and a control circuit.

[0074] A steaming and baking cavity 600 for steaming and baking food is formed inside the box body 300. A heating device is installed on the box body 300 to provide high-temperature steam and hot air flow to the steaming and baking cavity 600. A food access opening connected to the steaming and baking cavity 600 is provided on one side of the box body 300. The food access opening is used to place food to be steamed and baked into the steaming and baking cavity 600 and to take out the steamed and baked food.

[0075] The box door 400 is installed on the food access opening and is used to open and close the food access opening.

[0076] The water supply system 500 is used to provide water source for the waterway 1021 .

[0077] The control circuit (not shown in the figure) is used to control the heating device and the water supply system 500.

[0078] In a specific embodiment, Figure 7-10As shown, the box body 300 includes a cavity 301, an air guide cover 302 and a heat insulation board 303. One side of the cavity 301 is open to form a food access opening. The side of the cavity 301 opposite to the food access opening serves as a rear plate 3011. The air guide cover 302 and the heat insulation board 303 are respectively installed on the inner and outer sides of the rear plate 3011. A heating cavity 700 is formed between the air guide cover 302 and the rear plate 3011. The portion of the cavity 301 between the air guide cover 302 and the food access opening forms a steaming and baking cavity 600. The steam generating assembly 100 is installed in the heating cavity 700. A steam inlet hole 3021 and a ventilation hole 3022 are provided on the air guide cover 302. The steam spray pipe on the heating element corresponds to the steam inlet hole 3021, and is used to spray high-temperature steam into the steaming and baking cavity 600 through the steam inlet hole 3021. The fan assembly 200 is installed on the heat insulation board 303. Specifically, the motor 201 of the fan assembly 200 is installed on the outside of the heat insulation board 303. The fan blades 202 of the fan assembly 200 are located in the heating chamber 700 and fixed on the rotating shaft of the motor 201. Specifically, the ventilation holes 3022 include an air inlet hole 30221 for driving the hot air in the heating chamber 700 to the steaming and baking chamber 600 and an air outlet hole 30222 for allowing the hot air in the steaming and baking chamber 600 to flow back to the heating chamber 700. The air inlet hole 30221 is arranged in the middle of the air guide cover 302 and is opposite to the fan blades 202 of the fan assembly 200. There are four groups of air outlet holes 30222, which are respectively arranged at the four corners of the air guide cover 302. The hot air heated by the heating element in the heating chamber 700 is driven to the steaming and baking chamber 600 through the air inlet hole through the fan assembly 200. The hot air then flows back to the heating cavity 700 from the air outlet, so that the hot air forms a circulating hot air flow between the steaming and baking cavity 600 and the heating cavity 700.

[0079] In a specific embodiment, Figure 7 As shown, the water supply system 500 includes a water tank 501, a driving device 503 and a water supply pipe 502. One end of the water supply pipe 502 is connected to the water tank 501, and the other end is connected to the waterway 1021 through the water inlet 105. Specifically, in order to save installation space, the water tank 501 is designed to be flat, and is provided with a water inlet and a water outlet. The water supply pipe 502 is connected to the water outlet of the water tank 501 through a connecting piece 504. The driving device 503 is installed on the water supply pipe 502. Optionally, the driving device 503 is a water pump, which is electrically connected to the control circuit and is used to pump the water in the water tank 501 into the waterway 1021.

[0080] In summary, when the steam oven is used, the water tank 501 of the water supply system 500 is first checked to ensure that it has sufficient water for generating steam, the oven door 400 is opened, the food to be steamed is placed into the steaming and baking chamber 600 through the food access opening, the oven door 400 is closed, the power of the steam oven is turned on, and the control circuit controls the motor 201 and the heating element 101 of the heating device and the water pump of the water supply system 500, and the control circuit monitors the temperature of the heat storage body 103 in real time through the temperature sensor 104. The heating element 101 heats the heat storage body 103, and the heat storage body 103 absorbs heat and the temperature rises. When the control circuit detects that the heat storage body 103 reaches 120-150°C through the temperature sensor 104, the control circuit starts the motor 201 and the water pump. The water pump pumps the water in the water storage tank 501 into the water channel 1021 on the water transport pad 102 through the water supply pipe 502. The water is heated by the heat storage body 103 and converted into high-temperature steam and sprayed into the steam-baking cavity 600 from the steam inlet hole 3021 on the air guide cover 302. At the same time, the motor 201 drives the fan blades 202 to rotate and blow the hot air heated by the heating element in the heating cavity 700 into the steam-baking cavity 600 through the ventilation hole 3022. Through the joint action of the steam generating assembly 100 and the fan assembly 200, the hot air flow and the high-temperature steam heat the food in the steam-baking cavity 600 at the same time. The structure is simple, the cost is low, and the cooking effect is good.

[0081] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A heating device, characterized in that: include: A steam generating assembly comprises a heating element, wherein a water channel for generating steam is formed in the heating element; the steam generating assembly is generally annular; and A fan assembly, used to drive the air heated by the heating element to form a hot air flow, the fan assembly is located on one side of the steam generating assembly and is coaxially arranged with the steam generating assembly; The heating body includes a heating element, a water transport pad and a heat storage body, the water transport pad and the heat storage body are both annular plates, the water transport pad is clamped between the two heat storage bodies, the water channel is arranged on the water transport pad, and the water channel is arranged along the circumference of the water transport pad, the water channel includes a main water channel, a secondary water channel connected to one end of the main water channel, and a water storage channel arranged on one side of the main water channel and connected to the main water channel; the heat storage body is provided with a water inlet and a steam outlet connected to the water channel, and the direction of the steam outlet is the same as the blowing direction of the fan assembly, and the heating element is fixed on the heat storage body for heating the heat storage body.

2. The heating device according to claim 1, characterized in that The fan assembly includes a motor and fan blades fixed to the rotating shaft of the motor.

3. The heating device according to claim 1, characterized in that: The steam generating assembly further comprises a temperature sensor, which is mounted on the heating element and is used to detect the temperature of the heating element.

4. The heating device according to claim 1, characterized in that The width of the main water channel is greater than the width of the secondary water channel.

5. The heating device according to claim 1, characterized in that: The heating element is an arc-shaped electric heating rod arranged along the circumference of the heat storage body.

6. The heating device according to claim 1, characterized in that: The water inlet corresponds to an end of the main water channel away from the secondary water channel, and the steam outlet corresponds to an end of the secondary water channel away from the main water channel.

7. The heating device according to claims 3-6, characterized in that: The steam generating assembly further comprises a water inlet and a steam exhaust pipe, wherein the water inlet and the steam exhaust pipe are respectively mounted on the water inlet and the steam outlet.

8. A steam oven, characterized in that: It comprises a heating device as described in any one of claims 1 to 7.

9. The steam oven according to claim 8, characterized in that: The steam oven also includes: A box body, a steaming and baking cavity is formed inside, the heating device is installed on the box body, and is used to provide steam and hot air flow to the steaming and baking cavity, and a food taking and placing opening communicating with the steaming and baking cavity is provided on one side of the box body; A box door, installed on the food access opening, used to open and close the food access opening; a water supply system for providing water to the waterway; and A control circuit is used to control the heating device and the water supply system.

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