Muffle furnace convenient to exhaust

Abstract

The utility model provides a muffle furnace convenient to exhaust. A furnace body is internally provided with a hearth, the top of the furnace body is provided with an exhaust port, the hearth is connected with the exhaust port through an exhaust pipe, the exhaust port is covered with a baffle, and the furnace body is internally provided with a driving mechanism used for controlling the baffle to rotate. When air needs to be exhausted, the driving mechanism controls the baffle to be opened, manual operation is not needed, and operators are prevented from being scalded. The driving mechanism comprises a motor, a rotating shaft, a limiting plate, a first microswitch and a second microswitch, when the motor drives the rotating shaft to rotate, the limiting plate swings along with the rotating shaft, and when the motor touches the microswitches, the motor stops acting so as to control the baffle at the exhaust port to be opened and closed.

Description

Technical Field

[0001] This utility model relates to the field of muffle furnace technology, and in particular to a muffle furnace that facilitates exhaust. Background Technology

[0002] A muffle furnace generates high temperatures within its casing to heat objects to the required temperature. Simultaneously, an exhaust vent removes waste gases from the furnace, ensuring air circulation and improving heating efficiency. A manual exhaust valve is typically located on the side or top of the muffle furnace shell. To manually vent the gas, open the valve and wait patiently for all air to escape until no more gas comes out. However, because the exhausted gas is very hot, operators may suffer burns if they are not careful. Utility Model Content

[0003] In view of this, the present invention aims to provide a muffle furnace that facilitates exhaust, in order to solve the above-mentioned problems.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A muffle furnace with easy exhaust has a furnace chamber inside and an exhaust port at the top of the furnace chamber. The furnace chamber is connected to the exhaust port through an exhaust pipe. The exhaust port is covered with a baffle. The furnace chamber is equipped with a drive mechanism for controlling the rotation of the baffle. The drive mechanism includes a motor, a rotating shaft, a limiting plate, a first micro switch, and a second micro switch. The motor is installed inside the furnace chamber. The rotating shaft is vertically installed and driven to rotate by the motor. The upper end of the rotating shaft is fixedly connected to the baffle. The limiting plate is fixed to the side wall of the rotating shaft. The first micro switch and the second micro switch are respectively installed on both sides of the limiting plate. When the rotating shaft rotates, the limiting plate contacts the first micro switch or the second micro switch.

[0006] Furthermore, both the first and second microswitches are equipped with reeds, and the two reeds are arranged opposite each other.

[0007] Furthermore, the limiting plate includes a connecting section and a contact piece, with an obtuse angle between the connecting section and the contact piece. The connecting section is fixed to the side wall of the rotating shaft, and the rotation of the rotating shaft can enable the contact piece to contact the spring.

[0008] Furthermore, the motor, the first micro switch, and the second micro switch are mounted on a mounting bracket, which is fixed to the top of the furnace.

[0009] Furthermore, a controller circuit board is also mounted on the mounting bracket. The controller circuit board is connected to the motor, the first micro switch, and the second micro switch. The controller circuit board is covered by a circuit board housing.

[0010] Furthermore, a furnace door is provided on the front side of the furnace chamber.

[0011] Compared with the prior art, the muffle furnace with convenient exhaust described in this utility model has the following advantages:

[0012] The muffle furnace of this invention features an exhaust port on the top of its body, covered by a baffle. A drive mechanism is installed inside the furnace to control the rotation of the baffle. When exhaust is needed, the baffle opens via the drive mechanism, eliminating the need for manual operation and preventing burns to the operator. The drive mechanism includes a motor, a rotating shaft, a limit plate, a first micro switch, and a second micro switch. When the motor drives the rotating shaft to rotate, the limit plate swings accordingly. When it encounters a micro switch, the motor stops, thereby controlling the opening and closing of the baffle at the exhaust port. Attached Figure Description

[0013] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of the muffle furnace for easy exhaust as described in an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the driving structure described in an embodiment of the present utility model;

[0016] Figure 3 This is a top view of the driving structure described in an embodiment of the present utility model;

[0017] Figure 4 This is an internal structural diagram of the muffle furnace for easy exhaust as described in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Furnace body; 2. Furnace door; 3. Baffle; 4. Motor; 5. Rotating shaft; 6. Limit plate; 7. First micro switch; 8. Second micro switch; 9. Spring; 10. Mounting bracket; 11. Circuit board housing; 12. Exhaust pipe; 13. Furnace chamber. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figure 1-4 As shown, a muffle furnace with convenient exhaust has a furnace body 1 with a furnace chamber 13 inside. The top of the furnace body 1 has an exhaust port. The furnace chamber 13 is connected to the exhaust port through an exhaust pipe 12. The exhaust port is covered with a baffle 3. The furnace body 1 has a drive mechanism for controlling the rotation of the baffle 3. The drive mechanism includes a motor 4, a rotating shaft 5, a limiting plate 6, a first micro switch 7, and a second micro switch 8. The motor 4 is installed inside the furnace body 1. The rotating shaft 5 is vertically installed and driven to rotate by the motor 4. The upper end of the rotating shaft 5 is fixedly connected to the baffle 3. The limiting plate 6 is fixed on the side wall of the rotating shaft 5. The first micro switch 7 and the second micro switch 8 are respectively installed on both sides of the limiting plate 6. When the rotating shaft 5 rotates, the limiting plate 6 contacts the first micro switch 7 or the second micro switch 8.

[0025] The furnace body has an exhaust port on the top, covered by a baffle. Inside the furnace is a drive mechanism to control the rotation of the baffle. When exhaust is needed, the baffle opens via the drive mechanism, eliminating the need for manual operation and preventing burns to operators. The drive mechanism includes a motor, a rotating shaft, a limit plate, a first micro switch, and a second micro switch. When the motor drives the rotating shaft to rotate, the limit plate swings accordingly. When it encounters a micro switch, the motor stops, thus controlling the opening and closing of the baffle at the exhaust port.

[0026] For example, both the first micro switch 7 and the second micro switch 8 are provided with a spring 9, and the two springs 9 are arranged opposite to each other.

[0027] For example, the limiting plate 6 includes a connecting section and a contact piece, with an obtuse angle between the connecting section and the contact piece. The connecting section is fixed to the side wall of the rotating shaft 5, and the rotation of the rotating shaft 5 can enable the contact piece to contact the spring 9.

[0028] For example, the motor 4, the first micro switch 7, and the second micro switch 8 are mounted on the mounting bracket 10, which is fixed to the top of the furnace chamber 13.

[0029] For example, a controller circuit board is also mounted on the mounting bracket 10. The controller circuit board is connected to the motor 4, the first micro switch 7, and the second micro switch 8. The controller circuit board is covered by a circuit board housing 11.

[0030] For example, a furnace door 2 is provided on the front side of the furnace chamber 13.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A muffle furnace for easy exhaust, characterized in that: The furnace body has a furnace chamber, and the top of the furnace body has an exhaust port. The furnace chamber is connected to the exhaust port through an exhaust pipe. The exhaust port is covered with a baffle. The furnace body has a drive mechanism for controlling the rotation of the baffle. The drive mechanism includes a motor, a rotating shaft, a limit plate, a first micro switch and a second micro switch. The motor is located inside the furnace body. The rotating shaft is vertically arranged and driven to rotate by the motor. The upper end of the rotating shaft is fixedly connected to the baffle. The limit plate is fixed on the side wall of the rotating shaft. The first micro switch and the second micro switch are respectively located on both sides of the limit plate. When the rotating shaft rotates, the limit plate contacts the first micro switch or the second micro switch.

2. The muffle furnace for easy exhaust as described in claim 1, characterized in that: Both the first and second microswitches are equipped with reeds, and the two reeds are arranged opposite each other.

3. The muffle furnace for easy exhaust as described in claim 2, characterized in that: The limiting plate includes a connecting section and a contact piece. The connecting section and the contact piece form an obtuse angle. The connecting section is fixed on the side wall of the rotating shaft. The rotation of the rotating shaft can make the contact piece contact the spring.

4. The muffle furnace for easy exhaust as described in claim 1, characterized in that: The motor, the first micro switch, and the second micro switch are mounted on a mounting bracket, which is fixed to the top of the furnace.

5. The muffle furnace with easy exhaust as described in claim 4, characterized in that: The mounting bracket also houses a controller circuit board, which is connected to the motor, the first micro switch, and the second micro switch; the controller circuit board is covered by a circuit board housing.

6. The muffle furnace for easy exhaust as described in claim 1, characterized in that: A furnace door is located on the front side of the furnace chamber.

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