Coffee berry baking device for coffee production
By introducing heat into the coffee cherry roasting apparatus to monitor the roasting mechanism and stirring components, the problems of uneven heat distribution and low efficiency in traditional equipment are solved, achieving uniform heating and efficient production, thus improving the roasting quality and efficiency of coffee cherries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-01
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional coffee roasting equipment suffers from problems such as inaccurate temperature control, uneven heat distribution, low efficiency, and high energy consumption, making it difficult to meet the needs of large-scale production, and it also lacks real-time monitoring and intelligent control.
The system employs a heat-monitored roasting and coffee fruit processing unit. Temperature sensors monitor the internal temperature of the roasting chamber in real time, while a central controller adjusts the air pump and fan to ensure even distribution of hot air. Combined with a stirring and processing component, it prevents coffee fruit from piling up and not getting heated, thus achieving uniform heating and mixing.
This technology enables uniform heating of coffee cherries during the roasting process, improving production efficiency, reducing energy consumption, meeting the needs of large-scale production, and ensuring the uniform roasting quality of coffee cherries.
Smart Images
Figure CN224234679U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coffee production technology, specifically to a coffee fruit roasting device for coffee production. Background Technology
[0002] In the coffee production industry, coffee cherry roasting is a key step that determines the quality and flavor of coffee. Traditional roasting equipment suffers from problems such as inaccurate temperature control and uneven heating, which can easily lead to scorched or under-roasted coffee cherries, affecting aroma and taste. At the same time, existing equipment is difficult to meet the needs of large-scale production, with high energy consumption and low efficiency, and lacks real-time monitoring and intelligent control of parameters during the roasting process. Therefore, there is an urgent need for a new type of coffee cherry roasting equipment to improve production quality and efficiency.
[0003] According to a coffee cherry roasting device for coffee production disclosed on the patent website (authorization announcement number: CN219844932U), "This utility model provides a coffee cherry roasting device for coffee production, relating to the field of coffee production technology. It includes a roasting box, inside which are arranged several heating rings and a stirring component for agitating the coffee cherries. A door is hinged to the inlet of the roasting box. In this utility model, after roasting is completed, the operator activates a cooling fan, causing external airflow to flow rapidly into the air supply pipe and fully mix with the tumbling coffee cherries inside the roasting box, thereby rapidly cooling the coffee cherries. Finally, the airflow flows out of the exhaust port to the outside of the roasting box, rapidly cooling the coffee cherries. This not only prevents the coffee cherries from charring but also has high heat dissipation efficiency, reducing the time required to cool the coffee cherries and significantly decreasing the roasting time."
[0004] Based on the above, the applicant believes the following deficiencies exist:
[0005] The coffee roasting equipment for coffee production includes a roasting box. This equipment cools the coffee cherries in a short time, greatly reducing the roasting time. However, the equipment mostly heats the same spot continuously during use. Over time, a large amount of heat will accumulate in one place, resulting in uneven heat distribution inside the box. Some coffee cherries will not be heated evenly, which will affect the roasting efficiency. Utility Model Content
[0006] The purpose of this invention is to provide a coffee cherry roasting device for coffee production, so as to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, the present invention provides the following technical solution: a coffee fruit roasting device for coffee production, comprising a roasting box, wherein a coffee fruit processing mechanism is provided on the surface of the roasting box, the coffee fruit processing mechanism comprising a stirring processing component and an auxiliary rotation component, and a heat monitoring roasting mechanism is provided on the surface of the roasting box;
[0008] The heat-monitoring roasting mechanism includes a heating chamber, which is fixedly connected to the top and bottom of the left and right ends of the roasting oven. A detachable back panel is installed at the outer end of the heating chamber, and a mounting frame is fixedly connected to the inner end of the detachable back panel. An air fan is installed inside the mounting frame. An electric heating tube is installed inside the inner end of the heating chamber, and a perforated plate is installed inside the inner end of the heating chamber. A first temperature monitoring sensor is installed at the center of the left and right ends inside the roasting oven, and a second temperature monitoring sensor is installed at the left and right ends of the top of the roasting oven. A connecting box is installed at the center of the back of the roasting oven, and a first air pump is installed at the left and right ends of the connecting box. A first heat transfer pipe is installed between the first air pump and the roasting oven. A second heat transfer pipe is installed at the left and right ends of the top of the roasting oven, and a second air pump is installed between the second heat transfer pipe and the connecting box. The coffee berries are placed in the roasting oven... Inside the roasting chamber, the heating and monitoring mechanism heats the coffee cherries. The heating element generates heat, which is then blown into the chamber by a fan. During heating, the first and second temperature sensors monitor the temperature zones within the chamber in real time. When hot air accumulates locally or becomes stagnant during circulation, the temperature sensors in each zone send signals to the central controller. The central controller then activates the corresponding first air pump according to a preset program. This first air pump extracts the hot air through the first heat transfer pipe and re-introduces it into the chamber through another pipe. This process allows for the exchange and mixing of hot air from different levels and zones, effectively breaking up dead zones in the airflow and reducing temperature gradients within the chamber. This ensures that the plastic parts are heated more evenly during preheating.
[0009] Preferably, the heating element is located inside the fan, and the heating chamber is provided in four sets, which are symmetrically distributed at the left and right ends of the baking oven.
[0010] Preferably, the baking oven is provided with a first heat transfer pipe at both the left and right ends, and two sets of the first heat transfer pipe, the first air pump, the second heat transfer pipe, and the second air pump are provided.
[0011] Preferably, the mixing assembly includes a back frame, which is fixedly connected to the rear top of the baking oven. A placement cylinder is fixedly connected to the center top of the baking oven. A first motor frame is fixedly connected to the front top of the back frame. A first control motor is installed inside the first motor frame. A rotating shaft is provided at the bottom of the first control motor. A connecting frame is fixedly connected to the bottom of the rotating shaft. An electrically controlled self-locking lifting column is installed at the bottom of the connecting frame. A partition is fixedly connected to the bottom of the electrically controlled self-locking lifting column. A connecting shaft is fixedly connected to the bottom of the partition. A first fixing sleeve is fixedly connected to the middle section of the surface of the connecting shaft. A turbine-type mixing blade is fixedly connected to the surface of the first fixing sleeve. A second fixing sleeve is fixedly connected to the bottom of the surface of the connecting shaft. An anchor-type mixing blade is fixedly connected to the surface of the second fixing sleeve.
[0012] Preferably, the rotating shaft is fixedly connected to the bottom output end of the first control motor, and the rotating shaft, connecting frame, electrically controlled self-locking lifting column and partition are arranged inside the placement cylinder.
[0013] Preferably, the auxiliary rotation component includes a second motor frame, which is fixedly connected to the center of the bottom of the roasting oven. A second control motor is installed inside the second motor frame. A rotating shaft is provided on the top of the second control motor. The rotating shaft is fixedly connected to the top output end of the second control motor. A rotating seat is fixedly connected to the top of the rotating shaft. A coffee berry placement tube is provided on the top of the rotating seat.
[0014] Preferably, the baking oven has a sealed door on the front, an observation window is fixedly connected to the front of the sealed door, side seats are fixedly connected to the bottom of the left and right ends of the baking oven, feet are fixedly connected to the bottom of the side seats, a controller is installed on the top left front end of the baking oven, an exhaust valve is installed on the top right front end of the baking oven, and an exhaust pipe is fixedly connected to the top of the exhaust valve.
[0015] Compared with the prior art, the present invention provides a coffee cherry roasting device for coffee production, which has the following beneficial effects:
[0016] 1. This coffee roasting device is equipped with a heat-monitoring roasting mechanism. When the coffee cherries are placed inside the roasting chamber, the heat-monitoring roasting mechanism is activated to roast and heat the coffee cherries. The electric heating element generates heat, and the fan blows the heat into the roasting chamber to roast and heat the coffee cherries. During the heating process, the first and second temperature monitoring sensors monitor the temperature range inside the roasting chamber in real time. When hot air accumulates locally or flows poorly during circulation inside the roasting chamber, the temperature monitoring sensors in each area send signals back to the central controller. The central controller activates the corresponding first air pump according to the preset program. The first air pump extracts the hot air through the first heat transfer pipe and discharges it back into the roasting chamber through another pipe, realizing the mutual circulation and mixing of hot air in different layers and areas. This effectively breaks the dead zone of hot air flow, reduces the temperature gradient inside the chamber, and allows the plastic parts to be heated more evenly during the preheating process.
[0017] 2. This coffee roasting apparatus for coffee production is equipped with a coffee cherry processing mechanism. The coffee cherries are placed inside the coffee cherry placement cylinder and placed on the top component of the rotating seat. During the roasting and heating process, the auxiliary rotating component controls the rotation of the rotating shaft and rotating seat through the second control motor, thereby driving the coffee cherry placement cylinder to rotate in the opposite direction to the stirring and processing component. The stirring and processing component is driven by the first control motor to rotate the rotating shaft and the bottom component. The coffee cherries are stirred by turbine-type stirring blades and anchor-type stirring blades to prevent the coffee cherries from piling up and not being heated. The anchor-type stirring blades have a good stirring effect on the material at the bottom of the container, while the turbine-type stirring blades can generate strong shear force and turbulence to efficiently disperse and mix the coffee cherries. Through this combination, a relatively ideal flow field can be formed in the entire container, which not only ensures that the coffee cherries are fully stirred at the bottom and near the walls of the container, but also enables the coffee cherries to be uniformly mixed in the central area of the container, expanding the heating area. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0021] Figure 3 This is a schematic diagram of the auxiliary rotating component at the bottom of the structure of this utility model;
[0022] Figure 4 This is a schematic diagram of the mixing and processing component of this utility model;
[0023] Figure 5 This is a schematic diagram of the heat-monitoring baking mechanism of this utility model;
[0024] Figure 6 This is a schematic diagram of the back of the structure of this utility model.
[0025] In the diagram: 1. Roasting oven; 11. Sealed door; 12. Observation window; 2. Side seat; 3. Base; 4. Controller; 5. Exhaust valve; 6. Exhaust pipe; 7. Coffee cherry processing mechanism; 71. Stirring and processing assembly; 711. Back frame; 712. Placement cylinder; 713. First motor frame; 714. First control motor; 715. Rotating shaft; 716. Connecting frame; 717. Electrically controlled self-locking lifting column; 718. Partition; 719. Connecting shaft; 7101. First fixing sleeve; 7102. Turbine stirring blade; 7103. Second fixing sleeve; 7104. Anchor type 72. Stirring blade; 72. Auxiliary rotating assembly; 721. Second motor frame; 722. Second control motor; 723. Rotating shaft; 724. Rotating seat; 725. Coffee berry placing tube; 8. Heat-monitored roasting mechanism; 81. Heating chamber; 82. Removable back panel; 83. Mounting frame; 84. Fan; 85. Heating element; 86. Perforated plate; 87. First temperature monitoring sensor; 88. Second temperature monitoring sensor; 89. First heat transfer pipe; 801. Connecting housing; 802. First air pump; 803. Second heat transfer pipe; 804. Second air pump. Detailed Implementation
[0026] 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.
[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] This utility model provides the following technical solution:
[0029] Example 1
[0030] Please see Figure 1-6 A coffee cherry roasting apparatus for coffee production includes a roasting box 1, a coffee cherry processing mechanism 7 is provided on the surface of the roasting box 1, the coffee cherry processing mechanism 7 includes a stirring processing component 71 and an auxiliary rotation component 72, and a heat monitoring roasting mechanism 8 is provided on the surface of the roasting box 1.
[0031] The heat-monitoring baking mechanism 8 includes a heating chamber 81, which is fixedly connected to the top and bottom of the left and right ends of the baking oven 1. A detachable back plate 82 is installed on the outer end of the heating chamber 81, and a mounting frame 83 is fixedly connected to the inner end of the detachable back plate 82. An air fan 84 is installed inside the mounting frame 83. An electric heating tube 85 and a perforated plate 86 are installed inside the heating chamber 81. A first temperature monitoring sensor 87 is installed at the center of the left and right ends inside the baking oven 1. A second temperature monitoring sensor 88 is installed at the left and right ends of the top of the baking oven 1. A connecting box 801 is installed at the center of the back of the baking oven 1. A first air pump 802 is installed at the left and right ends of the connecting box 801. A first heat transfer pipe 89 is installed between the first air pump 802 and the baking oven 1. A second heat transfer pipe 803 is installed at the left and right ends of the top of the baking oven 1. A second air pump 804 is installed between the second heat transfer pipe 803 and the connecting box 801. When coffee berries are placed inside the roasting chamber 1, the heating and monitoring roasting mechanism 8 is activated to roast and heat the coffee berries. The heating element 85 generates heat, and the fan 84 blows the heat into the roasting chamber 1 to roast and heat the coffee berries. During the heating process, the first temperature monitoring sensor 87 and the second temperature monitoring sensor 88 monitor the temperature range inside the roasting chamber 1 in real time. When hot air accumulates locally or flows poorly during the circulation process inside the roasting chamber 1, the temperature monitoring sensors in each area send signals back to the central controller. The central controller starts the corresponding first air pump 802 according to the preset program. The first air pump 802 draws out the hot air through the first heat transfer pipe 89 and discharges it back into the roasting chamber 1 through another pipe, realizing the mutual circulation and mixing of hot air in different levels and areas, effectively breaking the dead zone of hot air flow, reducing the temperature gradient inside the chamber, and enabling the plastic parts to be heated more evenly during the preheating process.
[0032] The electric heating element 85 is located inside the fan 84, and the heating chamber 81 is provided with four sets, which are symmetrically distributed at the left and right ends of the baking oven 1.
[0033] The baking oven 1 is equipped with a first heat transfer pipe 89 at both the left and right ends. There are two sets of the first heat transfer pipe 89, the first air pump 802, the second heat transfer pipe 803, and the second air pump 804.
[0034] Example 2
[0035] Please see Figure 1-6 Furthermore, based on Embodiment 1, the mixing assembly 71 further includes a back frame 711, which is fixedly connected to the rear end of the top of the baking oven 1. A placement cylinder 712 is fixedly connected to the center of the top of the baking oven 1. A first motor frame 713 is fixedly connected to the front end of the top of the back frame 711. A first control motor 714 is installed inside the first motor frame 713. A rotating shaft 715 is provided at the bottom of the first control motor 714. A connecting frame 716 is fixedly connected to the bottom of the rotating shaft 715. 16. An electrically controlled self-locking lifting column 717 is installed at the bottom. A partition 718 is fixedly connected to the bottom of the electrically controlled self-locking lifting column 717. A connecting shaft 719 is fixedly connected to the bottom of the partition 718. A first fixing sleeve 7101 is fixedly connected to the middle section of the surface of the connecting shaft 719. A turbine-type stirring blade 7102 is fixedly connected to the surface of the first fixing sleeve 7101. A second fixing sleeve 7103 is fixedly connected to the bottom of the surface of the connecting shaft 719. An anchor-type stirring blade 7104 is fixedly connected to the surface of the second fixing sleeve 7103.
[0036] The rotating shaft 715 is fixedly connected to the bottom output end of the first control motor 714. The rotating shaft 715, the connecting frame 716, the electrically controlled self-locking lifting column 717 and the partition 718 are arranged inside the placement cylinder 712.
[0037] The auxiliary rotation component 72 includes a second motor frame 721, which is fixedly connected to the center of the bottom of the roasting box 1. A second control motor 722 is installed inside the second motor frame 721. A rotating shaft 723 is provided on the top of the second control motor 722. The rotating shaft 723 is fixedly connected to the top output end of the second control motor 722. A rotating seat 724 is fixedly connected to the top of the rotating shaft 723. A coffee berry placement tube 725 is provided on the top of the rotating seat 724.
[0038] The baking oven 1 has a sealed door 11 on the front, and an observation window 12 is fixedly connected to the front of the sealed door 11. Side seats 2 are fixedly connected to the bottom of the left and right ends of the baking oven 1, and feet 3 are fixedly connected to the bottom of the side seats 2. A controller 4 is installed on the front left of the top of the baking oven 1, and an exhaust valve 5 is installed on the front right of the top of the baking oven 1. An exhaust pipe 6 is fixedly connected to the top of the exhaust valve 5.
[0039] In actual operation, when this device is used, coffee cherries are placed inside the coffee cherry placement cylinder 725 and placed on the top part of the rotating seat 724. During the roasting and heating process, the auxiliary rotating component 72 controls the rotating shaft 723 and the rotating seat 724 to rotate through the second control motor 722, thereby driving the coffee cherry placement cylinder 725 to rotate in the opposite direction to the stirring component 71. The stirring component 71 drives the rotating shaft 715 and the bottom component to rotate through the first control motor 714. The coffee cherries are stirred by the turbine stirring blade 7102 and the anchor stirring blade 7104 to prevent the coffee cherries from piling up and not getting heated. The anchor stirring blade 7104 has a better stirring effect on the material at the bottom of the container, and the turbine stirring blade 7102 can generate strong shear force and turbulence to efficiently disperse and mix the coffee cherries. Through this combination, a relatively ideal flow field can be formed in the entire container, which not only ensures that the coffee cherries are fully stirred at the bottom and near the wall of the container, but also enables the coffee cherries to be uniformly mixed in the central area of the container, expanding the heating area.
[0040] When coffee cherries are placed inside the roasting chamber 1, the heating and monitoring roasting mechanism 8 is activated to roast and heat the coffee cherries. The electric heating tube 85 generates heat, and the fan 84 blows the heat into the roasting chamber 1 to roast and heat the coffee cherries. During the heating process, the first temperature monitoring sensor 87 and the second temperature monitoring sensor 88 monitor the temperature range inside the roasting chamber 1 in real time. When hot air accumulates locally or flows poorly during the circulation process inside the roasting chamber 1, the temperature monitoring sensors in each area send signals back to the central controller. The central controller starts the corresponding first air pump 802 according to the preset program. The first air pump 802 draws out the hot air through the first heat transfer pipe 89 and discharges it back into the roasting chamber 1 through another pipe, realizing the mutual circulation and mixing of hot air in different levels and areas, effectively breaking the dead zone of hot air flow, reducing the temperature gradient inside the chamber, and enabling the plastic parts to be heated more evenly during the preheating process.
[0041] The roasting process can be precisely controlled by controller 4. After the coffee cherries are roasted, controller 4 can activate exhaust valve 5 and exhaust pipe 6 to dissipate heat from inside roasting chamber 1, preventing overheating during unloading.
[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A coffee cherry roasting apparatus for coffee production, comprising a roasting chamber (1), characterized in that: The surface of the roasting box (1) is provided with a coffee fruit processing mechanism (7), which includes a stirring processing component (71) and an auxiliary rotation component (72). The surface of the roasting box (1) is provided with a heat monitoring roasting mechanism (8). The heat-monitoring baking mechanism (8) includes a heating chamber (81), which is fixedly connected to the top and bottom of the left and right ends of the baking oven (1). A detachable back plate (82) is installed on the outer end of the heating chamber (81), and a mounting frame (83) is fixedly connected to the inner end of the detachable back plate (82). A fan (84) is installed inside the mounting frame (83). An electric heating tube (85) is installed inside the heating chamber (81), and a perforated plate (86) is installed inside the heating chamber (81). A first temperature sensor is installed at the center of the left and right ends inside the baking oven (1). Temperature monitoring sensor (87), second temperature monitoring sensor (88) is installed at the top left and right ends of the baking oven (1), connecting box (801) is installed at the center of the back of the baking oven (1), first air pump (802) is installed at the left and right ends of the connecting box (801), first heat transfer pipe (89) is installed between the first air pump (802) and the baking oven (1), second heat transfer pipe (803) is installed at the top left and right ends of the baking oven (1), and second air pump (804) is installed between the second heat transfer pipe (803) and the connecting box (801).
2. The coffee cherry roasting apparatus for coffee production according to claim 1, characterized in that: The electric heating tube (85) is located inside the fan (84), and the heating chamber (81) is provided in four sets, which are symmetrically distributed at the left and right ends of the baking oven (1).
3. The coffee cherry roasting apparatus for coffee production according to claim 1, characterized in that: The baking oven (1) is provided with a first heat transfer pipe (89) at both the left and right ends, and two sets of the first heat transfer pipe (89), the first air pump (802), the second heat transfer pipe (803), and the second air pump (804) are provided.
4. The coffee cherry roasting apparatus for coffee production according to claim 1, characterized in that: The mixing assembly (71) includes a back frame (711), which is fixedly connected to the rear top of the baking oven (1). A placement cylinder (712) is fixedly connected to the center of the top of the baking oven (1). A first motor frame (713) is fixedly connected to the front top of the back frame (711). A first control motor (714) is installed inside the first motor frame (713). A rotating shaft (715) is provided at the bottom of the first control motor (714). A connecting frame (716) is fixedly connected to the bottom of the rotating shaft (715). The bottom of the connecting frame (716) is equipped with a connecting bracket (716). The device is equipped with an electrically controlled self-locking lifting column (717), with a partition (718) fixedly connected to the bottom end of the electrically controlled self-locking lifting column (717), a connecting shaft (719) fixedly connected to the bottom end of the partition (718), a first fixing sleeve (7101) fixedly connected to the middle section of the surface of the connecting shaft (719), a turbine-type stirring blade (7102) fixedly connected to the surface of the first fixing sleeve (7101), a second fixing sleeve (7103) fixedly connected to the bottom end of the surface of the connecting shaft (719), and an anchor-type stirring blade (7104) fixedly connected to the surface of the second fixing sleeve (7103).
5. The coffee cherry roasting apparatus for coffee production according to claim 4, characterized in that: The rotating shaft (715) is fixedly connected to the bottom output end of the first control motor (714). The rotating shaft (715), the connecting frame (716), the electrically controlled self-locking lifting column (717) and the partition (718) are arranged inside the placement cylinder (712).
6. The coffee cherry roasting apparatus for coffee production according to claim 1, characterized in that: The auxiliary rotating assembly (72) includes a second motor frame (721), which is fixedly connected to the center of the bottom of the roasting box (1). A second control motor (722) is installed inside the second motor frame (721). A rotating shaft (723) is provided on the top of the second control motor (722). The rotating shaft (723) is fixedly connected to the top output end of the second control motor (722). A rotating seat (724) is fixedly connected to the top of the rotating shaft (723). A coffee berry placement tube (725) is provided on the top of the rotating seat (724).
7. The coffee cherry roasting apparatus for coffee production according to claim 1, characterized in that: The baking oven (1) has a sealed door (11) on the front, and an observation window (12) is fixedly connected to the front of the sealed door (11). Side seats (2) are fixedly connected to the bottom of the left and right ends of the baking oven (1), and feet (3) are fixedly connected to the bottom of the side seats (2). A controller (4) is installed on the front left of the top of the baking oven (1), and an exhaust valve (5) is installed on the front right of the top of the baking oven (1). An exhaust pipe (6) is fixedly connected to the top of the exhaust valve (5).