Steaming oven

Abstract

The utility model discloses a steaming oven which comprises a heat exchange pipe, a heating pipe and a cooking cavity, the heating pipe is fixedly arranged on the top of the cooking cavity, and the heat exchange pipe is tightly attached to the top of the heating pipe and fixedly connected with the heating pipe. The heating pipes comprise a plurality of first heating pipes and a plurality of second heating pipes, and the first heating pipes are arranged along the periphery of the top of the cooking cavity to form a first annular heating pipeline; the plurality of second heating pipes are arranged in an internal annular area formed by the first annular heating pipeline to form a second annular heating pipeline; the heat exchange tubes comprise a first heat exchange tube and a second heat exchange tube, one end of the second heat exchange tube is connected with the second heating tube, and the other end of the second heat exchange tube is connected with one end of the first heat exchange tube; a water tank is fixedly arranged on the outer side wall of the cooking cavity, and an inlet of the heat exchange pipe is connected with an outlet of the water tank. Water in the heat exchange tube can be directly heated by the heating tube, so that the heating efficiency is improved, and the heat loss is reduced.

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] Current steam-grill integrated appliances can perform both steaming and baking functions. In steam mode, steam is typically generated by room-temperature liquid water stored in a water 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. The process of heating from room-temperature liquid water to steam is slow, the vaporization time is long, and energy efficiency is low. This can easily lead to uneven temperature distribution within the cooking cavity, affecting the cooking results. In baking mode, after temperature overshoot triggers the safety mechanism, the steam-grill cooking cavity relies entirely on natural cooling. The recovery process is lengthy and inefficient, impacting the user experience. Furthermore, after cooking, the cooking cavity cools down slowly, resulting in a long wait time before opening the door, and the risk of burns from escaping steam when the door is opened. Utility Model Content

[0003] In order to solve the technical problems in the background art and realize the heat energy recycling of the steam oven, the present invention provides a steam oven, which includes a heat exchange tube, a heating tube and a cooking cavity. The heating tube is fixedly installed on the top of the cooking cavity, and the heat exchange tube is closely attached to the top of the heating tube and fixedly connected to the heating tube.

[0004] The heating element includes multiple first heating elements and multiple second heating elements. The multiple first heating elements are arranged around the top of the cooking cavity and connected end to end to form a first annular heating pipe. The multiple second heating elements are arranged in the inner annular area formed by the first annular heating pipe and connected end to end to form a second annular heating pipe.

[0005] The heat exchange tube includes a first heat exchange tube and a second heat exchange tube. One end of the second heat exchange tube is connected to the second heating tube. The second heat exchange tube is arranged along the second annular heating pipe and is fixedly connected to the second heating tube. The other end of the second heat exchange tube is connected to one end of the first heat exchange tube. The first heat exchange tube is arranged along the first annular heating pipe and is fixedly connected to the first heating tube. The other end of the first heat exchange tube is connected to the cooking cavity.

[0006] A water tank is fixedly installed on the outer wall of the cooking cavity, and the inlet of the heat exchange tube is connected to the outlet of the water tank.

[0007] Furthermore, the second annular heating pipe includes a plurality of U-shaped pipes, with the opening directions of two adjacent U-shaped pipes arranged in opposite directions and connected end to end.

[0008] Furthermore, a fixing post is provided on the heat exchange tube arranged along a preset direction. The fixing post is fixedly connected to both the heating tube and the heat exchange tube, forming a fixed structure between the heating tube and the heat exchange tube. The preset direction is a direction perpendicular to the door of the steam oven.

[0009] The length of the fixed column is greater than or equal to 1 cm.

[0010] Furthermore, a connecting shaft is provided on the first annular heating pipe. One end of the connecting shaft is fixedly connected to the first pipe of the first annular heating pipe, and the other end of the connecting shaft is fixedly connected to the second pipe of the first annular heating pipe. The first pipe and the second pipe are opposite to each other. The connecting shaft is arranged parallel to the door of the steam oven.

[0011] Furthermore, a connecting through hole is fixedly provided on the connecting shaft, the connecting through hole including a first connecting through hole and a second connecting through hole, the first connecting through hole being disposed at the bottom of the second connecting through hole;

[0012] The diameter of the first connecting through hole matches the diameter of the heating tube, and the diameter of the second connecting through hole matches the diameter of the heat exchange tube. The heating tube, which is arranged along the preset direction, passes through the first connecting through hole and is connected to the connecting shaft, and the heat exchange tube, which is arranged along the preset direction, passes through the second connecting through hole and is connected to the connecting shaft.

[0013] Furthermore, a fixed bracket is also provided on the connecting shaft, and the fixed bracket is fixedly connected to the top of the cooking cavity.

[0014] Furthermore, the fixed support includes a first fixed support and a second fixed support, the first fixed support being fixedly disposed at one end of the connecting shaft near the first pipe, and the second fixed support being fixedly disposed at one end of the connecting shaft near the second pipe.

[0015] Furthermore, the distance from the first fixed bracket to the first pipe is a first distance, and the distance from the second fixed bracket to the second pipe is a second distance, wherein the first distance is equal to the second distance.

[0016] Furthermore, the distance from the inlet of the heat exchange tube to the second pipe is a third distance, and the distance from the outlet of the heat exchange tube to the second pipe is a fourth distance, wherein the third distance is greater than the fourth distance.

[0017] Furthermore, the second pipe is located on one side near the outer wall of the cooking cavity.

[0018] The beneficial effects of this utility model are:

[0019] The steam oven of this utility model includes a heat exchange tube, a heating tube, and a cooking cavity. The heating tube is fixedly installed on the top of the cooking cavity, and the heat exchange tube is closely attached to the top of the heating tube and fixedly connected to it. The heating tube includes multiple first heating tubes and multiple second heating tubes. The multiple first heating tubes are arranged around the top of the cooking cavity and connected end to end to form a first annular heating pipe. The multiple second heating tubes are arranged in the inner annular area formed by the first annular heating pipe and connected end to end to form a second annular heating pipe. The heat exchange tube includes a first heat exchange tube and a second heat exchange tube. One end of the second heat exchange tube is connected to the second heating tube. The second heat exchange tube is arranged along the second annular heating pipe and fixedly connected to the second heating tube. The other end of the second heat exchange tube is connected to one end of the first heat exchange tube. The first heat exchange tube is arranged along the first annular heating pipe and fixedly connected to the first heating tube. The other end of the first heat exchange tube communicates with the cooking cavity. A water tank is fixedly installed on the outer wall of the cooking cavity, and the inlet of the heat exchange tube is connected to the outlet of the water tank. This invention evenly positions the heating tubes at the top of the cooking cavity, resulting in more uniform heating and effectively ensuring the heating effect. It avoids localized excessively high or low temperatures that could affect the cooking result. By directly fixing the heat exchange tubes onto the heating tubes, the heating tubes can directly heat the water inside the heat exchange tubes, resulting in faster heating speed and higher heating efficiency, which can effectively improve the working efficiency of the steam oven. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the connection between a heating tube and a heat exchange tube provided by this utility model;

[0022] Figure 2 This is a schematic diagram of the top structure of a cooking cavity provided by this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of a steam oven provided by this utility model;

[0024] In the figure, the corresponding labels are: 1-heating tube, 2-heat exchange tube, 3-fixed column, 4-connecting shaft, 5-fixed bracket. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] like Figure 1-3 As shown, the present invention provides a steam oven, which includes a heat exchange tube 2, a heating tube 1 and a cooking cavity. The heating tube 1 is fixedly disposed on the top of the cooking cavity, and the heat exchange tube 2 is closely attached to the top of the heating tube 1 and fixedly connected to the heating tube 1.

[0028] The heating tube 1 includes multiple first heating tubes and multiple second heating tubes. The multiple first heating tubes are arranged around the top of the cooking cavity and connected end to end to form a first annular heating pipe. The multiple second heating tubes are arranged in the inner annular area formed by the first annular heating pipe and connected end to end to form a second annular heating pipe.

[0029] The heat exchange tube 2 includes a first heat exchange tube and a second heat exchange tube. One end of the second heat exchange tube is connected to the second heating tube. The second heat exchange tube is arranged along the second annular heating pipe and is fixedly connected to the second heating tube. The other end of the second heat exchange tube is connected to one end of the first heat exchange tube. The first heat exchange tube is arranged along the first annular heating pipe and is fixedly connected to the first heating tube. The other end of the first heat exchange tube is connected to the cooking cavity.

[0030] A water tank is fixedly installed on the outer wall of the cooking cavity, and the inlet of the heat exchange tube 2 is connected to the outlet of the water tank.

[0031] For example, the aforementioned steam oven includes a heat exchange tube 2, a heating tube 1, and a cooking cavity. The heating tube 1 is fixedly disposed on the top of the cooking cavity of the steam oven, and the heat exchange tube 2 is fixed above the heating tube 1, forming a vertical arrangement. The heating tube 1 may include multiple first heating tubes and multiple second heating tubes. The multiple first heating tubes are arranged around the top of the cooking cavity and connected end-to-end, thus forming a first annular heating pipe. The multiple second heating tubes are disposed within the inner annular area formed by the first annular heating pipe, and each second heating tube is connected end-to-end, thus forming a second annular heating pipe. The first annular heating tubes and the second annular heating pipe together form the top heating tube 1 of the steam oven, and the heating tube 1 is evenly distributed, effectively ensuring the heating effect and avoiding excessively high or low local temperatures that could affect the cooking result.

[0032] For example, the heat exchange tube 2 may include a first heat exchange tube and a second heat exchange tube. One end of the second heat exchange tube, i.e., the inlet of the heat exchange tube 2, is connected to the second heating tube. The second heat exchange tube is arranged along the second annular heating pipe and is fixedly connected to the second heating tube. The other end of the second heat exchange tube is connected to one end of the first heat exchange tube. The first heat exchange tube is arranged along the first annular heating pipe and is fixedly connected to the first heating tube. The other end of the first heat exchange tube, i.e., the outlet of the heat exchange tube 2, is connected to the cooking cavity to realize the transmission of water within the heat exchange tube 2. In addition, a water tank is fixedly installed on the outer wall of the cooking cavity. The inlet of the heat exchange tube 2 is connected to the outlet of the aforementioned water tank. Water in the water tank flows from the inlet of the heat exchange tube 2 into the heat exchange tube 2. When the top heating tube 1 is turned on, since the heat exchange tube 2 is directly arranged above the heating tube 1, the heating tube 1 can directly heat the water in the heat exchange tube 2, resulting in faster heating speed, higher heating efficiency, and higher heat absorption efficiency of the heat exchange tube 2. In addition, since the temperature at the top of the steam oven is higher, the heating speed will be faster when the heat exchange tube 2 is set at the top of the steam oven, which will improve the heat circulation efficiency of the heat exchange tube 2 and the working efficiency of the steam oven, and realize the rational use of energy.

[0033] For example, in order to ensure the working efficiency of the heat exchange tube 2, the overlap between the heat exchange tube 2 and the heating tube 1 can be greater than or equal to 80%. This effectively ensures the simplicity and rationality of the structure while also ensuring the working efficiency of the steam oven.

[0034] Furthermore, the aforementioned second annular heating pipe includes multiple U-shaped pipes, with the opening directions of two adjacent U-shaped pipes arranged in opposite directions and connected end to end.

[0035] For example, the aforementioned second annular heating pipe includes multiple U-shaped pipes. The opening directions of two adjacent U-shaped pipes are arranged in opposite directions, that is, an inverted U-shaped pipe is next to a regular U-shaped pipe, and the two adjacent U-shaped pipes are connected end to end to form the second annular heating pipe. By setting the first and second annular heating pipes, the heating elements can be evenly distributed at the top of the cooking cavity. When the heating elements at the top start heating, the cooking cavity can be heated evenly, so that the heat is evenly distributed and avoids the situation where only a certain part of the cooking cavity is hot during the heating process, which would affect the heating efficiency and cooking effect of the steam oven. In addition, other shapes of annular pipes can also be set in the aforementioned second annular pipe, as long as they are evenly distributed at the top of the cooking cavity, so that the heating elements 1 can achieve efficient and uniform heating when heating.

[0036] This invention uses a second annular heating pipe with multiple U-shaped pipes to ensure that the heating tubes 1 are evenly distributed at the top of the cooking cavity, thereby improving the heating efficiency of the steam oven.

[0037] Furthermore, a fixing post 3 is provided on the heat exchange tube 2 arranged along a preset direction. The fixing post 3 is fixedly connected to both the heating tube 1 and the heat exchange tube 2, forming a fixed structure between the heating tube 1 and the heat exchange tube 2. The preset direction is a direction perpendicular to the door of the steam oven.

[0038] The length of the aforementioned fixed column 3 is greater than or equal to 1 cm.

[0039] For example, each set of heat exchange tubes 2 and heating tubes 1 overlapping in a preset direction is provided with a fixing post 3. The fixing post 3 can be a metal post, which not only ensures tight contact between the heat exchange tubes 2 and heating tubes 1, thus fixing them, but also allows for direct heat transfer, improving heat transfer efficiency and accelerating heating speed. The preset direction can be vertical, that is, perpendicular to the door of the steam oven. The length of the metal post needs to be greater than or equal to 1 cm to ensure the fixing structure between the heating tubes 1 and heat exchange tubes 2. Alternatively, a longer metal post may be used for better heat transfer. The specific length can be adjusted according to actual needs and equipment costs.

[0040] By setting a fixing column 3, this utility model can ensure that the heating tube 1 and the heat exchange tube 2 are in close contact, while also allowing direct heat transfer, thus effectively improving the heat absorption efficiency of the heat exchange tube 2.

[0041] Furthermore, a connecting shaft 4 is provided on the first annular heating pipe. One end of the connecting shaft 4 is fixedly connected to the first pipe of the first annular heating pipe, and the other end of the connecting shaft 4 is fixedly connected to the second pipe of the first annular heating pipe. The first pipe and the second pipe are opposite to each other. The connecting shaft 4 is arranged parallel to the door of the steam oven.

[0042] For example, a connecting shaft 4 is also provided on the first annular heating pipe. One end of the connecting shaft 4 is fixedly connected to the first pipe of the first annular heating pipe, and the other end is fixedly connected to the second pipe of the first annular heating pipe. This makes the structure of the first annular heating pipe provided around the top of the cooking cavity more stable and ensures the reliability of the heating pipe 1 structure.

[0043] This invention ensures the reliability of the heating pipe 1 connection structure by setting a connecting shaft 4 to connect two opposite pipes of the first annular heating pipe.

[0044] Furthermore, a connecting through hole is fixedly provided on the connecting shaft 4. The connecting through hole includes a first connecting through hole and a second connecting through hole, with the first connecting through hole located at the bottom of the second connecting through hole.

[0045] The diameter of the first connecting through hole matches the diameter of the heating tube 1, and the diameter of the second connecting through hole matches the diameter of the heat exchange tube 2. The heating tube 1, which is arranged along the preset direction, passes through the first connecting through hole and is connected to the connecting shaft 4, and the heat exchange tube 2, which is arranged along the preset direction, passes through the second connecting through hole and is connected to the connecting shaft 4.

[0046] For example, the connecting shaft 4 is also provided with a connecting through hole, which may include a first connecting through hole and a second connecting through hole arranged vertically. The first connecting through hole is located below the second connecting through hole. The diameter of the first connecting through hole matches the diameter of the heating tube 1, so that the heating tube 1 can pass through the first connecting through hole and be fixedly connected to the connecting shaft 4. The diameter of the second connecting through hole matches the diameter of the heat exchange tube 2, so that the heat exchange tube 2 can pass through the second connecting through hole and be fixedly connected to the connecting shaft 4. This can effectively ensure the fixed structure between the heat exchange tube 2 and the heating tube 1, improve the stability of the connection between the heat exchange tube 2 and the heating tube 1, and ensure the structural reliability and safety of the steam oven.

[0047] This invention enables a fixed connection structure between the heat exchange tube 2 and the heating tube 1 by setting a connecting through hole on the connecting shaft 4 that matches the diameter of the heat exchange tube 2 and the heating tube 1. This ensures that they can be stably set on the top of the cooking cavity, thereby improving the structural reliability and safety of the steam oven.

[0048] Furthermore, a fixed bracket 5 is also provided on the connecting shaft 4, and the fixed bracket 5 is fixedly connected to the top of the cooking cavity.

[0049] For example, a fixing bracket 5 is also provided on the connecting shaft 4. The fixing bracket 5 is fixedly connected to the top of the cooking cavity, thereby fixing the heating tube 1 to the top of the cooking cavity.

[0050] This invention enables a fixed connection between the heating tube 1 and the top of the cooking cavity by setting a fixed bracket 5 on the connecting shaft 4, ensuring a stable connection structure between the heating tube 1 and the top of the cooking cavity, and improving the structural reliability of the steam oven.

[0051] Furthermore, the aforementioned fixed bracket 5 includes a first fixed bracket and a second fixed bracket. The first fixed bracket is fixedly disposed at one end of the connecting shaft 4 near the first pipe, and the second fixed bracket is fixedly disposed at one end of the connecting shaft 4 near the second pipe.

[0052] For example, the aforementioned fixed bracket 5 may include a first fixed bracket and a second fixed bracket. The first fixed bracket is fixedly disposed at one end of the connecting shaft 4 near the first pipe, and the second fixed bracket is fixedly disposed at one end of the connecting shaft 4 near the second pipe. That is, the two fixed brackets 5 are respectively disposed at both ends of the connecting shaft 4, making the connection between the connecting shaft 4 and the top of the cooking cavity more stable. In addition, more fixed brackets 5 can be disposed, and the multiple fixed brackets 5 can be evenly distributed on the connecting shaft 4 to avoid the fixed connection structure between the connecting shaft 4 and the top of the cooking cavity being affected by the damage or detachment of a certain fixed bracket, which could cause the heating tube 1 to fall off, thereby causing equipment damage and safety accidents.

[0053] This invention provides a fixed bracket 5 at each end of the connecting shaft 4, which makes the connection between the connecting shaft 4 and the top of the cooking cavity more stable, preventing the connecting shaft 4 from falling off due to damage to a single fixed bracket 5, and ensuring the structural stability and reliability of the steam oven.

[0054] Furthermore, the distance from the first fixed bracket to the first pipe is the first distance, and the distance from the second fixed bracket to the second pipe is the second distance, wherein the first distance is equal to the second distance.

[0055] For example, the distance from the first fixed bracket to the first pipe is equal to the distance from the second fixed bracket to the second pipe, making the connection structure between the connecting shaft 4 and the top of the cooking cavity more stable.

[0056] This utility model makes the structure of the connecting shaft 4 more stable by setting symmetrical fixed brackets 5 at both ends, so as to fix the connecting shaft 4 to the top of the cooking wall.

[0057] Furthermore, the distance from the inlet of the heat exchange tube 2 to the second pipe is the third distance, and the distance from the outlet of the heat exchange tube 2 to the second pipe is the fourth distance, wherein the third distance is greater than the fourth distance.

[0058] For example, the inlet and outlet of the heat exchange tube 2 in this utility model can be set on the same side and in adjacent positions. The distance from the inlet of the heat exchange tube 2 to the second pipe is greater than the distance from the outlet of the heat exchange tube 2 to the second pipe, ensuring that water can absorb heat from the heating tube 1 from the heat exchange tube 2. This achieves a reasonable setting of the heat exchange tube 2 structure in the sine steam oven, optimizes the structure of the steam oven, and reduces the equipment manufacturing cost of the steam oven.

[0059] This invention optimizes the structural design of the steam oven by rationally designing the inlet and outlet of the heat exchange tube 2, thereby achieving the desired heat transfer effect.

[0060] Furthermore, the second pipe is located on one side near the outer wall of the cooking cavity.

[0061] For example, in this utility model, the second pipe is located on the side of the outer wall of the cooking cavity where the water tank is located. This allows for a shorter transport distance, avoiding the low heat transfer efficiency caused by long pipe transport and the heat loss of the water in the heat exchange tube 2 after heating, thereby improving the heat circulation efficiency of the heat exchange tube 2. In addition, the reasonable structural design also effectively shortens the transport pipe, further simplifies the circuit structure of the steam oven, and effectively reduces the circuit connection cost of the steam oven.

[0062] This invention effectively shortens the water flow transmission distance by setting the inlet and outlet of the heat exchange tube 2 to the side close to the water tank, greatly reducing heat transfer loss and improving the heat exchange efficiency of the heat exchange tube 2 and the working efficiency of the steam oven.

[0063] For example, a pressurized water pump is fixedly installed on the outer wall of the cooking cavity, and the outlet of the heat exchange pipe 2 is connected to the heating water pump. 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 a 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.

[0064] 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.

[0065] The beneficial effects of this utility model are:

[0066] The steam oven of this utility model includes a heat exchange tube, a heating tube, and a cooking cavity. The heating tube is fixedly installed on the top of the cooking cavity, and the heat exchange tube is closely attached to the top of the heating tube and fixedly connected to it. The heating tube includes multiple first heating tubes and multiple second heating tubes. The multiple first heating tubes are arranged around the top of the cooking cavity and connected end to end to form a first annular heating pipe. The multiple second heating tubes are arranged in the inner annular area formed by the first annular heating pipe and connected end to end to form a second annular heating pipe. The heat exchange tube includes a first heat exchange tube and a second heat exchange tube. One end of the second heat exchange tube is connected to the second heating tube. The second heat exchange tube is arranged along the second annular heating pipe and fixedly connected to the second heating tube. The other end of the second heat exchange tube is connected to one end of the first heat exchange tube. The first heat exchange tube is arranged along the first annular heating pipe and fixedly connected to the first heating tube. The other end of the first heat exchange tube communicates with the cooking cavity. A water tank is fixedly installed on the outer wall of the cooking cavity, and the inlet of the heat exchange tube is connected to the outlet of the water tank. This invention evenly positions the heating tubes at the top of the cooking cavity, resulting in more uniform heating and effectively ensuring the heating effect. It avoids localized excessively high or low temperatures that could affect the cooking result. By directly fixing the heat exchange tubes onto the heating tubes, the heating tubes can directly heat the water inside the heat exchange tubes, resulting in faster heating speed and higher heating efficiency, which can effectively improve the working efficiency of the steam oven.

[0067] 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 exchange tube (2), a heating tube (1) and a cooking cavity. The heating tube (1) is fixedly installed on the top of the cooking cavity. The heat exchange tube (2) is close to the top of the heating tube (1) and is fixedly connected to the heating tube (1). The heating tube (1) includes multiple first heating tubes and multiple second heating tubes. The multiple first heating tubes are arranged around the top of the cooking cavity and connected end to end to form a first annular heating pipe. The multiple second heating tubes are arranged in the inner annular area formed by the first annular heating pipe and connected end to end to form a second annular heating pipe. The heat exchange tube (2) includes a first heat exchange tube and a second heat exchange tube. One end of the second heat exchange tube is connected to the second heating tube. The second heat exchange tube is arranged along the second annular heating pipe and is fixedly connected to the second heating tube. The other end of the second heat exchange tube is connected to one end of the first heat exchange tube. The first heat exchange tube is arranged along the first annular heating pipe and is fixedly connected to the first heating tube. The other end of the first heat exchange tube is connected to the cooking cavity. A water tank is fixedly installed on the outer wall of the cooking cavity, and the inlet of the heat exchange tube (2) is connected to the outlet of the water tank.

2. The steam oven according to claim 1, characterized in that, The second annular heating pipe includes multiple U-shaped pipes, with the opening directions of two adjacent U-shaped pipes arranged in opposite directions and connected end to end.

3. The steam oven according to claim 1, characterized in that, A fixing post (3) is provided on the heat exchange tube (2) arranged along a preset direction. The fixing post (3) is fixedly connected to both the heating tube (1) and the heat exchange tube (2) to form a fixed structure between the heating tube (1) and the heat exchange tube (2). The preset direction is a direction perpendicular to the door of the steam oven. The length of the fixed column (3) is greater than or equal to 1 cm.

4. The steam oven according to claim 3, characterized in that, A connecting shaft (4) is provided on the first annular heating pipe. One end of the connecting shaft (4) is fixedly connected to the first pipe of the first annular heating pipe, and the other end of the connecting shaft (4) is fixedly connected to the second pipe of the first annular heating pipe. The first pipe and the second pipe are opposite to each other. The connecting shaft (4) is arranged parallel to the door of the steam oven.

5. The steam oven according to claim 4, characterized in that, A connecting through hole is fixedly provided on the connecting shaft (4). The connecting through hole includes a first connecting through hole and a second connecting through hole. The first connecting through hole is located at the bottom of the second connecting through hole. The diameter of the first connecting through hole matches the diameter of the heating tube (1), the diameter of the second connecting through hole matches the diameter of the heat exchange tube (2), the heating tube (1) arranged along the preset direction passes through the first connecting through hole and is connected to the connecting shaft (4), and the heat exchange tube (2) arranged along the preset direction passes through the second connecting through hole and is connected to the connecting shaft (4).

6. The steam oven according to claim 5, characterized in that, A fixed bracket (5) is also provided on the connecting shaft (4), and the fixed bracket (5) is fixedly connected to the top of the cooking cavity.

7. The steam oven according to claim 6, characterized in that, The fixed bracket (5) includes a first fixed bracket and a second fixed bracket. The first fixed bracket is fixedly disposed at one end of the connecting shaft (4) near the first pipe, and the second fixed bracket is fixedly disposed at one end of the connecting shaft (4) near the second pipe.

8. The steam oven according to claim 7, characterized in that, The distance from the first fixed bracket to the first pipe is the first distance, and the distance from the second fixed bracket to the second pipe is the second distance. The first distance is equal to the second distance.

9. The steam oven according to claim 4, characterized in that, The distance from the inlet of the heat exchange tube (2) to the second pipe is the third distance, and the distance from the outlet of the heat exchange tube (2) to the second pipe is the fourth distance. The third distance is greater than the fourth distance.

10. The steam oven according to claim 9, characterized in that, The second pipe is located on one side near the outer wall of the cooking cavity.

Images