An operation control circuit for a smoke dispenser

Abstract

The utility model discloses an operation control circuit for a smoke loading machine, which belongs to the field of smoke loading machines, and includes an emergency stop switch SB, a self-resetting switch SR, a limit switch SQ, a time relay KT, an indicator light HL and a motor speed regulator VSD; one end of the emergency stop switch SB is connected to an external mains live wire L; the other end of the emergency stop switch SB is connected to one end of the self-resetting switch SR; the other end of the emergency stop switch SB is connected to one end of the normally closed contact of the limit switch SQ, the other end of the normally closed contact of the limit switch SQ is electrically connected to the positive connection end of the indicator light HL and the positive connection end of the motor speed regulator VSD, and the other end of the emergency stop switch SB is connected to the connection 6 end of the time relay KT. The utility model can well control the stop position of the chain each time through the limit switch, which is convenient for unloading the rising smoke rack or performing other operations, and the operation is accurate. At the same time, it does not need to cause errors caused by manual control to affect the rising of the smoke rack, thereby increasing safety and facilitating the use of the device.

Description

Technical Field

[0001] The utility model relates to the field of hoods, in particular to an operation control circuit for hoods. Background Art

[0002] The smoke loading machine drives the chain through the rotation of the high-speed motor, thereby sending the smoke rack at a lower place to a higher place. People at the higher place directly hang the smoke rack on the smoke carrying rack, which can save manpower and improve efficiency.

[0003] When the existing smoke loading machine is working, when the chain sends the smoke rack at a lower position to a higher position, it cannot be stopped in time and requires manual operation. When the chain is stopped by manual operation, it is not possible to accurately locate the height at which the smoke rack stops every time. At the same time, people cannot control the operation of the chain well, which affects the safety of controlling the rise of the smoke rack. Utility Model Content

[0004] With regard to the above problems existing in the prior art, the purpose of the present utility model is to provide an operation control circuit for a range hood to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A running control circuit for a range hood comprises an emergency stop switch SB, a self-resetting switch SR, a limit switch SQ, a time relay KT, an indicator light HL and a motor speed regulator VSD; one end of the emergency stop switch SB is connected to an external mains live wire L; the other end of the emergency stop switch SB is connected to one end of the self-resetting switch SR; the other end of the emergency stop switch SB is connected to one end of a normally closed contact of the limit switch SQ, the other end of the normally closed contact of the limit switch SQ is electrically connected to a positive connection end of the indicator light HL and a positive connection end of the motor speed regulator VSD, the other end of the emergency stop switch SB is connected to a connection terminal 6 of the time relay KT, the other end of the self-resetting switch SR is connected to a connection terminal 1+ of the time relay KT, and the connection terminal 7 of the time relay KT is connected to the positive connection end of the indicator light HL.

[0007] As a further solution of the utility model: the negative connection terminal of the indicator light HL, the negative connection terminal of the motor speed regulator VSD, and the connection terminal 2 of the time relay KT are all connected to the external mains neutral line N.

[0008] As a further solution of the utility model: the time relay KT is set to delay disconnection for 5S.

[0009] As a further solution of the utility model: a limit stopper is provided on the limit switch SQ, and a sensor is used on the stopper.

[0010] As a further solution of the utility model: the model of the time relay KT is JS14A.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model can only be powered on when the reset switch is pressed, and the time relay is used to delay disconnection, so that the speed motor can rotate for 5 seconds, resulting in a 5-second travel of the upper cigarette rack. This travel makes the limit switch pass the block, and the normally closed contact of the limit switch is closed. The motor continues to rotate until the limit switch touches the next block, and the motor stops rotating. Press the reset switch again to continue moving, and so on. The limit switch can control the stop position of the chain every time, which is convenient for unloading the rising cigarette rack or performing other operations. The operation is accurate, and there is no need for manual control to cause errors, which affects the rise of the cigarette rack, increases safety, and facilitates the use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a circuit schematic diagram of an operation control circuit for a range hood disclosed in an embodiment. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", and "connected" should be understood in a broad sense; for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0016] See also Figure 1 , an operation control circuit for a smoke exhaust fan, comprising an emergency stop switch SB, a self-reset switch SR, a limit switch SQ, a time relay KT, an indicator light HL and a motor speed regulator VSD;

[0017] One end of the emergency stop switch SB is connected to the external AC live wire L; the emergency stop switch SB is used to control the stop of the chain to increase safety; the external AC live wire L and neutral wire N are convenient for powering the device, which is beneficial to the operation of the range hood and the use of the device.

[0018] The other end of the emergency stop switch SB is connected to one end of the self-resetting switch SR; the self-resetting switch SR is used to start the next movement of the chain, which is convenient for controlling the operation of the next range hood, and is conducive to raising and moving the smoke rack again, making it easier to use the device.

[0019] The other end of the emergency stop switch SB is connected to one end of the normally closed contact of the limit switch SQ, and the other end of the normally closed contact of the limit switch SQ is electrically connected to the positive connection end of the indicator light HL and the positive connection end of the motor speed regulator VSD. After the cigarette rack rises to a suitable position, the circuit is stopped by the limit switch SQ, which is convenient for the wooden chain to stop, and is conducive to unloading the cigarette rack that has risen to a suitable position or performing other operations;

[0020] The negative connection terminal of the indicator light HL and the negative connection terminal of the motor speed regulator VSD are both electrically connected to the external AC neutral line N; the indicator light HL is used to display the normal operation of the motor, and the motor speed regulator VSD facilitates the control of the normal operation of the motor, drives the chain to move, facilitates the rise of the cigarette rack, and facilitates the use of the device.

[0021] The other end of the emergency stop switch SB is connected to the wiring terminal 6 of the time relay KT, and the other end of the self-resetting switch SR is connected to the wiring terminal 1+ of the time relay KT. The self-resetting switch SR is used to control the movement of the chain again, so that the cigarette rack rises again, ensuring the cyclic operation of the device, facilitating the use of the device, and ensuring safety.

[0022] The connection terminal 2 of the time relay KT is connected to the external mains neutral line N;

[0023] The connection terminal 7 of the time relay KT is connected to the positive connection terminal of the indicator light HL.

[0024] The limit switch SQ is provided with a limit stopper, and a sensor is used on the stopper. The sensor is used to conveniently control the opening and closing of the limit switch SQ, thereby increasing safety and facilitating the use of the device.

[0025] The time relay KT is set to delay disconnection by 5S.

[0026] The model of time relay KT is JS14A. The transistor time relay adopts large-scale special integrated circuit and knob setting. It has high precision, wide delay range, low power consumption, beautiful appearance and small size.

[0027] After the utility model is connected to the power supply, the current is output through the normally closed contact of the emergency stop switch. When the limit switch does not contact the block, the limit switch is a normally closed contact, and the current is transmitted to the indicator light and the positive pole of the motor speed regulator through the limit switch, so that the indicator light is always on and the motor speed regulator works, driving the speed motor to rotate, and the upper cigarette rack starts to rotate.

[0028] When the stopper of the upper cigarette rack transmission rotates to the limit switch, the normally closed point of the limit switch is disconnected, the entire circuit is broken, and the motor stops rotating;

[0029] Press the reset switch and the normally open contact closes. At this time, the time relay contacts 1 and 2 are energized, the time relay starts working, the normally open contacts 6 and 7 at the output end are connected and closed, and the current passes through the indicator light and the positive pole of the motor speed regulator, making the indicator light always on and the motor speed regulator work, driving the speed motor to rotate, and causing the upper cigarette rack to start rotating.

[0030] Since the reset switch can only be powered on when it is pressed, the time relay (set delay of 5s) is used for delayed disconnection, which can make the speed motor rotate for 5S, resulting in a 5s travel of the upper cigarette rack. This travel makes the limit switch pass the block, and the normally closed contact of the limit switch is closed. The motor continues to rotate until the limit switch touches the next block, and the motor stops rotating. Press the reset switch again to continue moving, and so on. The utility model can control the stop position of the chain every time through the limit switch, which is convenient for unloading the rising cigarette rack or performing other operations. The operation is precise, and there is no need for manual control to cause errors, which affects the rise of the cigarette rack, increases safety, and facilitates the use of the device.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An operation control circuit for a hood, characterized in that: It includes an emergency stop switch SB, a self-resetting switch SR, a limit switch SQ, a time relay KT, an indicator light HL and a motor speed regulator VSD; one end of the emergency stop switch SB is connected to the external mains live wire L; the other end of the emergency stop switch SB is connected to one end of the self-resetting switch SR; the other end of the emergency stop switch SB is connected to one end of the normally closed contact of the limit switch SQ, the other end of the normally closed contact of the limit switch SQ is electrically connected to the positive connection end of the indicator light HL and the positive connection end of the motor speed regulator VSD, the other end of the emergency stop switch SB is connected to the connection 6 end of the time relay KT, the other end of the self-resetting switch SR is connected to the connection 1+ end of the time relay KT, and the connection 7 end of the time relay KT is connected to the positive connection end of the indicator light HL.

2. The operation control circuit for a hood according to claim 1, characterized in that: The negative connection terminal of the indicator light HL, the negative connection terminal of the motor speed regulator VSD, and the connection terminal 2 of the time relay KT are all connected to the external mains neutral line N.

3. The operation control circuit for a hood according to claim 2, characterized in that: The time relay KT is set to delay disconnection by 5S.

4. The operation control circuit for a hood according to claim 3, characterized in that: The limit switch SQ is provided with a limit stopper, and a sensor is used on the stopper.

5. The operation control circuit for a hood dispenser according to claim 4, characterized in that: The model of the time relay KT is JS14A.

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