Steaming oven

Abstract

The utility model discloses a steaming oven which comprises a heat exchanger, a heating pipe and a cooking cavity, the heat exchanger and the heating pipe are both fixedly arranged on the target inner side wall of the cooking cavity, and the target inner side wall and a door body of the steaming oven are oppositely arranged; the heating pipe is in a closed ring shape, the heat exchanger comprises a plurality of heat exchange pipes, the heat exchange pipes are arranged on the periphery of the heating pipe in a dispersed mode, and every two adjacent heat exchange pipes are connected end to end so that the heat exchange pipes can jointly form an annular pipeline. An inlet and an outlet of the annular pipeline are formed in the same side of the target inner side wall, and the distance from the inlet of the annular pipeline to the bottom of the cooking cavity is smaller than that from the outlet of the annular pipeline to the bottom of the cooking cavity; a water tank is fixedly arranged on the outer side wall of the cooking cavity, and an inlet of the annular pipeline is connected with an outlet of the water tank. The heat exchanger is arranged in the cooking cavity, so that the heat exchange efficiency of the heat exchanger can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen equipment technology, and in particular to a steam oven. Background Technology

[0002] One current trend in kitchen appliance development is towards integrated design, such as integrated steam and oven appliances, enabling both steaming and baking functions. In steam mode, steam is typically generated by room-temperature liquid water stored in a tank flowing into the bottom of the cooking cavity. The water is then heated by a heating plate at the bottom, causing it to vaporize and form steam. However, the process of transforming room-temperature liquid water into steam is slow, involves long vaporization times, and has low energy efficiency. This can easily lead to uneven temperature distribution within the cooking cavity, affecting the cooking results. In baking mode, after a temperature overshoot triggers the safety mechanism, the oven relies entirely on natural cooling. This recovery process is lengthy and inefficient, impacting the user experience. Furthermore, the slow cooling of the cooking cavity after cooking means users have to wait a long time to open the door, and the steam overflow poses a risk of burns. Utility Model Content

[0003] To address the technical problems in the background art and realize the recycling and reuse of heat energy in a steam oven, this utility model provides a steam oven, which includes a heat exchanger and a cooking cavity. The heat exchanger is fixedly installed on the inner wall of the cooking cavity. The steam oven includes a heat exchanger, a heating element, and the cooking cavity. The heat exchanger and the heating element are both fixedly installed on the target inner side wall of the cooking cavity, and the target inner side wall is opposite to the door of the steam oven.

[0004] The heating tube is a closed loop, and the heat exchanger includes multiple heat exchange tubes. The multiple heat exchange tubes are distributed around the heating tube, and two adjacent heat exchange tubes are connected end to end so that the multiple heat exchange tubes together form a loop pipe.

[0005] The inlet and outlet of the annular pipe are both located on the same side of the inner wall of the target. The distance from the inlet of the annular pipe to the bottom of the cooking cavity is a first distance, and the distance from the outlet of the annular pipe to the bottom of the cooking cavity is a second distance. The first distance is less than the second distance.

[0006] A water tank and a pressurized water pump are fixedly installed on the outer wall of the cooking cavity. The inlet of the annular pipe is connected to the outlet of the water tank, and the outlet of the annular pipe is connected to the inlet of the pressurized water pump.

[0007] Furthermore, the heating tube is provided with a first fixing tube and a second fixing tube, one end of the first fixing tube is fixedly connected to the heating tube, and one end of the second fixing tube is fixedly connected to the heating tube;

[0008] The first fixing tube and the second fixing tube are both fixedly installed on the same side of the heating tube, and the first fixing tube and the second fixing tube are parallel to each other; the first fixing tube is parallel to the bottom surface of the cooking cavity.

[0009] Furthermore, a fixed base is provided on the inner sidewall of the target, and the fixed base is provided with a first fixed hole and a second fixed hole. The other end of the first fixed tube passes through the first fixed hole and is fixedly connected to the cooking cavity, and the other end of the second fixed tube passes through the second fixed hole and is fixedly connected to the cooking cavity. The diameter of the first fixed hole matches the diameter of the first fixed tube, and the diameter of the second fixed hole matches the diameter of the second fixed tube.

[0010] Furthermore, the distance from the first fixing hole to the heating tube is the third distance, and the distance from the second fixing hole to the heating tube is the fourth distance, wherein the third distance is equal to the fourth distance.

[0011] Furthermore, a fixing buckle is provided on the side of the heating tube opposite to the first fixing tube, and a slot is provided on the inner sidewall of the target. The shape of the fixing buckle matches the shape of the slot, and the fixing buckle engages with the slot.

[0012] Furthermore, the interval between two adjacent heat exchange tubes arranged in a preset direction is greater than 5 mm; the preset direction is a direction perpendicular to the bottom surface of the cooking cavity.

[0013] Furthermore, the outlet of the water tank is connected to the inlet of the annular pipe via a water pipe, the cross-sectional area of ​​the heat exchange tube is the first cross-sectional area, the cross-sectional area of ​​the water pipe is the second cross-sectional area, and the first cross-sectional area is less than or equal to twice the second cross-sectional area.

[0014] Furthermore, the annular pipe includes multiple annular loops, and the number of annular loops is greater than or equal to two.

[0015] Furthermore, the steam oven also includes a hot air blower, which is fixedly installed at a preset position in the cooking cavity. The preset position is a closed annular area formed by the heating tube on the inner wall of the target.

[0016] Furthermore, the air outlet of the hot air blower is fixedly installed on the inner wall of the cooking cavity.

[0017] The beneficial effects of this utility model are:

[0018] This invention relates to a steam oven comprising a heat exchanger, heating elements, and a cooking cavity. Both the heat exchanger and heating elements are fixedly mounted on the inner sidewall of the cooking cavity, which is opposite to the oven door. The heating elements are closed loops. The heat exchanger comprises multiple heat exchange tubes distributed around the heating elements, with adjacent tubes connected end-to-end to form a loop. The inlet and outlet of the loop are located on the same side of the inner sidewall. The distance from the inlet to the bottom of the cooking cavity is a first distance, and the distance from the outlet to the bottom of the cooking cavity is a second distance, where the first distance is less than the second distance. A water tank and a pressurized water pump are fixedly mounted on the outer sidewall of the cooking cavity. The inlet of the loop is connected to the outlet of the water tank, and the outlet is connected to the inlet of the pressurized water pump. This invention places the heat exchanger inside the cooking cavity, effectively improving its heat exchange efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the inner sidewall of a steam oven provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a heating element in a steam oven provided by this utility model;

[0022] Figure 3 This is a schematic diagram of the back structure of a steam oven provided by this utility model;

[0023] In the figure, the corresponding labels are: 1-heating tube, 2-heat exchange tube, 3-first fixed tube, 4-second fixed tube, 5-fixed base, 6-fixed buckle, 7-hot air blower. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0026] like Figure 1-3 As shown, this utility model provides a steam oven, which includes a heat exchanger, a heating tube 1 and a cooking cavity. The heat exchanger and the heating tube 1 are both fixedly installed on the inner side wall of the cooking cavity, and the inner side wall of the cavity is opposite to the door of the steam oven.

[0027] The heating tube 1 is a closed loop, and the heat exchanger includes multiple heat exchange tubes 2. The multiple heat exchange tubes 2 are distributed around the heating tube 1, and two adjacent heat exchange tubes 2 are connected end to end so that the multiple heat exchange tubes 2 together form a loop pipe.

[0028] The inlet and outlet of the aforementioned annular pipe are both located on the same side of the inner wall of the aforementioned target. The distance from the inlet of the aforementioned annular pipe to the bottom of the aforementioned cooking cavity is the first distance, and the distance from the outlet of the aforementioned annular pipe to the bottom of the aforementioned cooking cavity is the second distance. The first distance is less than the second distance.

[0029] A water tank and a pressurized water pump are fixedly installed on the outer wall of the cooking cavity. The inlet of the annular pipe is connected to the outlet of the water tank, and the outlet of the annular pipe is connected to the inlet of the pressurized water pump.

[0030] For example, the steam oven includes a heat exchanger, a heating element 1, and a cooking cavity. The heating element 1 and the heat exchanger are both located on the inner side wall of the cooking cavity, which is opposite to the door of the steam oven. That is, the heating element 1 and the heat exchanger are both located on the back of the cooking cavity and inside the cooking cavity. This allows the heat to be directly transferred to the inside of the cooking cavity when the heating element 1 is turned on, reducing heat transfer loss and improving the cooking efficiency of the steam oven.

[0031] For example, the back heating tube 1 is configured as a closed loop, and multiple heat exchange tubes 2 can be arranged around the heating tube 1. Adjacent heat exchange tubes 2 are connected end-to-end to form a loop pipe. The inlet and outlet of the loop pipe are both located on the same side of the inner wall of the target. The inlet of the loop pipe is connected to the outlet of the water tank in the steam oven, and the outlet of the loop pipe is connected to the inlet of the pressurized water pump in the steam oven. This allows the water in the water tank to absorb heat through the loop pipe, and after passing through the pressurized water pump, it enters the interior of the cooking cavity as steam, thus realizing the cooking function of the steam oven. The distance from the inlet of the loop pipe to the bottom of the cooking cavity is less than the distance from the outlet of the loop pipe to the bottom of the cooking cavity; that is, the inlet of the heat exchange tube 2 is located below the outlet of the heat exchange tube 2. This allows the water in the water tank to enter from the bottom of the cooking cavity and flow out from the top. Because the temperature inside the cooking cavity is relatively higher at the top, a relatively stable temperature difference is ensured for the water in the heat exchange tube 2, accelerating the heating speed of the water in the heat exchange tube 2 and effectively improving the heat exchange efficiency of the heat exchanger.

[0032] Furthermore, the heating tube 1 is provided with a first fixing tube 3 and a second fixing tube 4, one end of the first fixing tube 3 is fixedly connected to the heating tube 1, and one end of the second fixing tube 4 is fixedly connected to the heating tube 1.

[0033] The first fixing tube 3 and the second fixing tube 4 are both fixedly installed on the same side of the heating tube 1, and the first fixing tube 3 and the second fixing tube 4 are parallel to each other; the first fixing tube 3 is parallel to the bottom surface of the cooking cavity.

[0034] For example, the heating tube 1 is provided with a first fixing tube 3 and a second fixing tube 4 that are parallel to each other, which can fix the heating tube 1 to the back wall of the cooking cavity. One end of the first fixing tube 3 is fixedly connected to the heating tube 1, and one end of the second fixing tube 4 is fixedly connected to the heating tube 1. The first fixing tube 3 and the second fixing tube 4 can be spaced at an appropriate distance, which can be adjusted according to the size of the heating tube 1 to ensure the stability and reliability of the fixing structure.

[0035] This invention, by setting a first fixing tube 3 and a second fixing tube 4 that are parallel to each other, can fix the heating tube 1 to the back wall of the cooking cavity, preventing the heating tube 1 from falling off and affecting the normal heating function of the steam oven.

[0036] Furthermore, a fixed base 5 is provided on the inner side wall of the target, and the fixed base 5 is provided with a first fixing hole and a second fixing hole. The other end of the first fixing tube 3 passes through the first fixing hole and is fixedly connected to the cooking cavity, and the other end of the second fixing tube 4 passes through the second fixing hole and is fixedly connected to the cooking cavity. The diameter of the first fixing hole matches the diameter of the first fixing tube 3, and the diameter of the second fixing hole matches the diameter of the second fixing tube 4.

[0037] For example, a fixing base 5 is provided on the inner side wall of the cooking cavity. The fixing base 5 is provided with two fixing holes, namely a first fixing hole and a second fixing hole. The diameter of the first fixing hole matches the diameter of the first fixing tube 3. The other end of the first fixing tube 3 passes through the first fixing hole and is fixedly connected to the cooking cavity. The diameter of the second fixing hole matches the diameter of the second fixing tube 4. The other end of the second fixing tube 4 passes through the second fixing hole and is fixedly connected to the cooking cavity. This realizes the connection between the heating tube 1 and the cooking cavity, making the fixing structure of the heating tube 1 more stable and reliable.

[0038] This invention provides a fixed base 5 on the cooking cavity, which allows the first fixed tube 3 and the second fixed tube 4 on the heating tube 1 to be connected to the cooking cavity through the fixing holes on the fixed base 5. This ensures the reliability of the connection between the heating tube 1 and the cooking cavity, prevents the heating tube 1 from falling off, and improves the structural reliability and equipment safety of the steam oven.

[0039] Furthermore, the distance from the first fixing hole to the heating tube 1 is the third distance, the distance from the second fixing hole to the heating tube 1 is the fourth distance, and the third distance is equal to the fourth distance.

[0040] For example, the first fixing hole and the second fixing hole can be arranged vertically, with the first fixing hole positioned above the second fixing hole. The distance from the first fixing hole to the heating tube 1 is equal to the distance from the second fixing hole to the heating tube 1. In other words, the first fixing hole can be positioned directly above the second fixing hole, which can make the structure of the fixing base 5 more regular and simple, effectively reduce the manufacturing difficulty of the equipment, reduce costs, and achieve the fixing between the heating tube 1 and the back wall of the cooking cavity with a simpler structure.

[0041] This invention, by setting a simpler and more regular structure, not only achieves reliable and stable fixing of the heating element 1, but also effectively reduces the manufacturing difficulty of the steam oven.

[0042] Furthermore, a fixing buckle 6 is provided on the side of the heating tube 1 opposite to the first fixing tube 3, and a slot is provided on the inner side wall of the target. The shape of the fixing buckle 6 matches the shape of the slot, and the fixing buckle 6 engages with the slot.

[0043] For example, the heating tube 1 is also provided with a fixing buckle 6, which is arranged opposite to the first fixing tube 3 to ensure that each side of the annular heating tube 1 has a structure that can be fixed to the back wall of the cooking cavity, thus ensuring the reliability of the connection between the heating tube 1 and the cooking cavity. A groove is provided on the inner side wall of the cooking cavity, the shape of which matches the shape of the fixing buckle 6, so that the buckle on the heating tube 1 can engage with the groove on the cooking cavity, further fixing the heating tube 1 to the back wall of the cooking cavity. This achieves a fixed structure between the heating tube 1 and the cooking cavity, effectively preventing the heating tube 1 from falling off due to insecure fixing, which would prevent normal heating and affect the cooking effect of the steam oven, thus improving the structural reliability and safety of the steam oven.

[0044] This invention further secures the heating tube 1 and the cooking cavity by setting matching fixing buckles 6 and slots on the heating tube 1 and the cooking cavity respectively, ensuring a fixed connection between the heating tube 1 and the cooking cavity, and improving the structural reliability and safety of the steam oven.

[0045] Furthermore, the interval between two adjacent heat exchange tubes 2 arranged in a preset direction is greater than 5 mm; the preset direction is a direction perpendicular to the bottom surface of the cooking cavity.

[0046] For example, the interval between two vertically arranged adjacent heat exchange tubes 2 can be set to be greater than 5mm to ensure that the two adjacent heat exchange tubes 2 do not stick to each other, thus ensuring the normal use of the heat exchange tubes 2 and enabling them to fully absorb heat during use, thereby effectively improving the heat exchange effect.

[0047] This invention ensures that the two adjacent heat exchange tubes 2 are not in contact with each other by setting the interval between them to be greater than a suitable distance, thus ensuring that the heat exchange tubes 2 can fully absorb heat and improve the heat exchange efficiency of the heat exchanger.

[0048] Furthermore, the outlet of the water tank is connected to the inlet of the annular pipe via a water pipe, the cross-sectional area of ​​the heat exchange tube 2 is the first cross-sectional area, the cross-sectional area of ​​the water pipe is the second cross-sectional area, and the first cross-sectional area is less than or equal to twice the second cross-sectional area.

[0049] For example, the outlet of the water tank can be connected to the inlet of the annular pipe, i.e. the heat exchange pipe 2, via a water pipe. The water pipe can be a flexible hose. The cross-sectional area of ​​the heat exchange pipe 2 is less than or equal to twice the cross-sectional area of ​​the water pipe. The diameter of the heat exchange pipe 2 can be the same as the diameter of the water pipe to ensure that the water in the water tank can flow in the pipe at a stable flow rate. This avoids sudden increases in water flow that could damage the pipe or insufficient water flow that could affect the cooking progress of the steam oven, thus improving the reliability of the connecting pipes.

[0050] This invention ensures the stability of water flow and improves the reliability of connecting pipes in the steam oven by controlling the diameter of the water pipe and the heat exchange pipe 2.

[0051] Furthermore, the aforementioned annular pipe includes multiple annular loops, and the number of the annular loops is greater than or equal to two.

[0052] For example, the annular pipe formed by the heat exchange tube 2 includes multiple annular loops, which enables the water in the heat exchange tube 2 to fully absorb heat and heat up quickly. The more loops there are, the higher the heat absorption efficiency. The specific number can be adjusted according to the size, structure and other requirements of the steam oven.

[0053] This invention, by setting the heat exchange tube 2 as a series of multiple annular loops, can effectively absorb heat, causing the temperature of the water inside the heat exchange tube 2 to rise rapidly, thereby effectively improving the heat absorption efficiency of the heat exchanger.

[0054] Furthermore, the steam oven also includes a hot air blower 7, which is fixedly installed at a preset position in the cooking cavity. The preset position is the closed annular area formed by the heating tube 1 on the inner wall of the target.

[0055] For example, the steam oven also includes a hot air blower 7, which is fixed to the back wall of the cooking cavity. Specifically, it can be positioned in the middle of the back wall to ensure even heat distribution within the cooking cavity, resulting in more uniform temperature distribution and improved cooking performance. Since the back heating element 1 is a closed loop, the hot air blower 7 can be fixed within this loop, improving the internal structure of the steam oven. This more compact design ensures better performance, meets the need for miniaturized steam ovens, and enhances their practicality and applicability.

[0056] By rationally setting the position of the hot air blower 7, this utility model can improve the structure of the steam oven, enhance its structural compactness, ensure uniform temperature inside the cooking cavity of the steam oven, and effectively guarantee the cooking effect of the food inside the steam oven.

[0057] Furthermore, the air outlet of the aforementioned hot air blower 7 is fixedly installed on the inner side wall of the aforementioned target.

[0058] For example, the air outlet of the hot air blower 7 is located on the inner side wall of the cooking cavity, that is, the air outlet of the hot air blower 7 is set towards the inside of the cooking cavity, so as to ensure that the hot air blower 7 can blow heat into the cooking cavity of the steam oven, accelerate the heating of the steam oven, and effectively improve the cooking efficiency of the steam oven.

[0059] This invention improves the cooking efficiency of the steam oven by setting the air outlet of the hot air blower 7 towards the inside of the cooking cavity, which can quickly blow heat into the inside of the cooking cavity.

[0060] For example, the steam oven of this utility model can also be equipped with a steam nozzle. The inlet of the steam nozzle is connected to the outlet of the pressurized water pump, and the outlet of the steam nozzle is set towards the inside of the cooking cavity. Water in the water tank enters the heat exchanger through the water pipe and absorbs heat in the heat exchanger. When the temperature sensor in the steam oven detects that the temperature inside the cavity reaches 90°C or above, the water in the heat exchanger is pumped by the pressurized water pump and then through the steam nozzle to deliver steam into the cooking cavity to realize the cooking function of the steam oven.

[0061] For example, the steam oven of this utility model can also be equipped with a multi-way reversing valve. The multi-way reversing valve can be set between the connection line of the pressurized water pump and the steam nozzle. When the temperature sensor in the steam oven detects that the temperature inside the cavity reaches 90°C or above, the outlet of the multi-way reversing valve is connected to the inlet of the steam nozzle to deliver steam into the cooking cavity. When the temperature sensor detects that the temperature inside the cavity exceeds the set cooking temperature by 5°C or when cooking is finished, the outlet of the multi-way reversing valve is connected to the inlet of the water tank. Through the circulation between the water tank and the heat exchanger, the heat inside the cooking cavity is quickly removed, and the temperature drops rapidly to avoid the temperature being too high and affecting the cooking effect. At the end of cooking, the cooling time of the steam oven is reduced to prevent high temperature burns.

[0062] The beneficial effects of this utility model are:

[0063] The steam oven of this utility model includes a heat exchanger, a heating element, and a cooking cavity. The heat exchanger and the heating element are both fixedly installed on the inner side wall of the cooking cavity, which is opposite to the door of the steam oven. The heating element is a closed loop. The heat exchanger includes multiple heat exchange tubes, which are distributed around the heating element. Adjacent heat exchange tubes are connected end to end to form a loop pipe. The inlet and outlet of the loop pipe are both located on the same side of the inner side wall. The distance from the inlet of the loop pipe to the bottom of the cooking cavity is a first distance, and the distance from the outlet of the loop pipe to the bottom of the cooking cavity is a second distance. The first distance is less than the second distance. A water tank and a pressurized water pump are fixedly installed on the outer side wall of the cooking cavity. The inlet of the loop pipe is connected to the outlet of the water tank, and the outlet of the loop pipe is connected to the inlet of the pressurized water pump. This invention features heating elements and a heat exchanger both located at the back of the cooking cavity and inside the cavity. This allows heat to be directly transferred to the interior of the cooking cavity when the heating elements are turned on, reducing heat transfer loss, improving the heat exchange efficiency of the heat exchanger, and ultimately enhancing the cooking efficiency of the steam oven.

[0064] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A steam oven, characterized in that, The steam oven includes a heat exchanger, a heating tube (1) and a cooking cavity. The heat exchanger and the heating tube (1) are both fixedly installed on the inner side wall of the cooking cavity. The inner side wall of the target is opposite to the door of the steam oven. The heating tube (1) is a closed loop, and the heat exchanger includes multiple heat exchange tubes (2). The multiple heat exchange tubes (2) are distributed around the heating tube (1), and two adjacent heat exchange tubes (2) are connected end to end so that the multiple heat exchange tubes (2) together form a loop pipe. The inlet and outlet of the annular pipe are both located on the same side of the inner wall of the target. The distance from the inlet of the annular pipe to the bottom of the cooking cavity is a first distance, and the distance from the outlet of the annular pipe to the bottom of the cooking cavity is a second distance. The first distance is less than the second distance. A water tank and a pressurized water pump are fixedly installed on the outer wall of the cooking cavity. The inlet of the annular pipe is connected to the outlet of the water tank, and the outlet of the annular pipe is connected to the inlet of the pressurized water pump.

2. The steam oven according to claim 1, characterized in that, The heating tube (1) is provided with a first fixing tube (3) and a second fixing tube (4). One end of the first fixing tube (3) is fixedly connected to the heating tube (1), and one end of the second fixing tube (4) is fixedly connected to the heating tube (1). The first fixing tube (3) and the second fixing tube (4) are both fixedly installed on the same side of the heating tube (1), and the first fixing tube (3) and the second fixing tube (4) are parallel to each other; the first fixing tube (3) is parallel to the bottom surface of the cooking cavity.

3. The steam oven according to claim 2, characterized in that, A fixed base (5) is provided on the inner side wall of the target. The fixed base (5) is provided with a first fixed hole and a second fixed hole. The other end of the first fixed tube (3) passes through the first fixed hole and is fixedly connected to the cooking cavity. The other end of the second fixed tube (4) passes through the second fixed hole and is fixedly connected to the cooking cavity. The diameter of the first fixed hole matches the diameter of the first fixed tube (3), and the diameter of the second fixed hole matches the diameter of the second fixed tube (4).

4. The steam oven according to claim 3, characterized in that, The distance from the first fixing hole to the heating tube (1) is the third distance, and the distance from the second fixing hole to the heating tube (1) is the fourth distance. The third distance is equal to the fourth distance.

5. The steam oven according to claim 2, characterized in that, A fixing buckle (6) is provided on the side of the heating tube (1) opposite to the first fixing tube (3). A slot is provided on the inner sidewall of the target. The shape of the fixing buckle (6) matches the shape of the slot, and the fixing buckle (6) engages with the slot.

6. The steam oven according to claim 1, characterized in that, The interval between two adjacent heat exchange tubes (2) arranged in a preset direction is greater than 5 mm; the preset direction is the direction perpendicular to the bottom surface of the cooking cavity.

7. The steam oven according to claim 1, characterized in that, The outlet of the water tank is connected to the inlet of the annular pipe via a water pipe. The cross-sectional area of ​​the heat exchange tube (2) is the first cross-sectional area, and the cross-sectional area of ​​the water pipe is the second cross-sectional area. The first cross-sectional area is less than or equal to twice the second cross-sectional area.

8. The steam oven according to claim 1, characterized in that, The annular pipe includes multiple annular loops, and the number of annular loops is greater than or equal to two.

9. The steam oven according to claim 1, characterized in that, The steam oven also includes a hot air blower (7), which is fixedly installed at a preset position in the cooking cavity. The preset position is the closed annular area formed by the heating tube (1) on the inner wall of the target.

10. The steam oven according to claim 9, characterized in that, The air outlet of the hot air blower is fixedly installed on the inner side wall of the target.

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