CN112716024B

CN112716024B - Drying machine

Info

Publication number: CN112716024B
Application number: CN202110056189.6A
Authority: CN
Inventors: 赵玉斌; 于浩
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2022-09-02
Anticipated expiration: 2041-01-15
Also published as: CN112716024A

Abstract

The invention relates to a dryer, which comprises a switch module, a control module and a motor, wherein the switch module is used for generating a first input signal, a second input signal and a third input signal; the control module is used for controlling the motor to operate in the first gear after operating in the second gear for a first set time when receiving the first input signal; the motor is controlled to operate at a second gear when receiving a second input signal; the motor is controlled to stop running when receiving the third input signal; the motor is used for driving the fan to rotate. Therefore, the dryer can automatically control the running gear of the motor to meet the requirement according to the signal generated by the switch module, and particularly can start the high gear for several seconds at first and then start the low gear, so that the instant starting current of the circulating fan is ensured to be small, the torque is small, the fan is not easy to burn, and the service life of the fan is ensured.

Description

Drying machine

Technical Field

The invention relates to the technical field of heat pump drying, in particular to a dryer.

Background

The heat pump tobacco drying generally adopts a mode that hot air is utilized to dry materials, a heater is utilized to heat ambient air to a proper temperature, the hot air enters a curing barn to transfer heat to the materials, moisture in the hot air is vaporized and separated from the materials, the separated moisture needs to be discharged from the curing barn through a dehumidifying air door, and the materials are ensured to be dried.

The tobacco drying process is actually the process of evaporating moisture from tobacco leaves under the condition of heating, but the heating temperature, the heating time and the wet bulb temperature must strictly comply with the tobacco drying process so as to ensure that the color and the aroma of the dried tobacco leaves belong to high-grade tobacco leaves. The drying process is simply introduced as shown in figure 1, and the running states of the fans are different in different baking stages.

In order to ensure the drying quality, the circulating fan can run in different states under the conditions of different stages, different temperatures and different humidity. When the circulating fan is started to be high-grade, the circulating fan is required to be started for several seconds at low grade and then to be started to be high grade, because the high grade is directly started, the instant starting current of the circulating fan is large, the torque is large, the service life of the circulating fan is damaged, and even the circulating fan can be burnt.

At present, circulating fans are controlled by manual mechanical rotary switches.

Specifically, as shown in fig. 2, the existing intensive baking house controllers all adopt mechanical rotary switches, and need to be manually operated.

When the rotary switch is shifted to a stop gear, the inside of the rotary switch is completely disconnected, and the fan stops running.

When the rotary switch is shifted to a low-speed gear position, the U low, the V low and the W low in the rotary switch are respectively communicated with the L1, the L2 and the L3, and the fan runs at a low speed.

The rotary switch is shifted to a high-speed gear position, the U low, the V low and the W low in the rotary switch are in short circuit, the U high, the V high and the W high are respectively communicated with the L1, the L2 and the L3, and the fan runs at a high speed.

When the circulating fan starts high-grade, the circulating fan is required to start the low-grade for several seconds and then start the high-grade, because the high-grade is directly started, the instant starting current of the circulating fan is large, the torque is large, the service life of the fan is damaged, and even the fan can be burnt. However, when the tobacco grower actually operates, the tobacco grower may directly click the two parts to switch from the stop state to the high speed state, and the operation of the tobacco grower can not be ensured to be completely performed according to the requirement. And the manual operation has the contingency, if the cigarette grower switches the fan gear untimely, will influence the flue-cured tobacco quality.

Disclosure of Invention

The invention provides a dryer, which solves the technical problem that in the prior art, a fan gear control mode cannot ensure that an operator operates according to requirements to damage a fan.

In order to achieve the purpose, the invention adopts the following technical scheme:

a dryer, comprising:

a switch module for generating a first input signal, a second input signal and a third input signal;

the control module is used for controlling the motor to operate at the second gear for a first set time and then operate at the first gear when receiving the first input signal; the motor is controlled to operate at a second gear when receiving a second input signal; the motor is controlled to stop running when receiving the third input signal;

and the motor is used for driving the fan to rotate.

Compared with the prior art, the technical scheme of the invention has the following technical effects: the dryer comprises a switch module, a control module and a motor, wherein the switch module is used for generating a first input signal, a second input signal and a third input signal; the control module is used for controlling the motor to operate in the second gear for a first set time and then in the first gear when receiving the first input signal; the motor is controlled to operate at a second gear when receiving a second input signal; the motor is controlled to stop running when receiving the third input signal; the motor is used for driving the fan to rotate. Therefore, the dryer can automatically control the running gear of the motor to meet the requirement according to the signal generated by the switch module, and particularly can start the high gear for several seconds at first and then start the low gear, so that the instant starting current of the circulating fan is ensured to be small, the torque is small, the fan is not easy to burn, and the service life of the fan is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a drying process.

Fig. 2a-2c are schematic diagrams of gear control of a prior art fan motor.

Fig. 3 is a schematic view of a drying structure of the dryer.

Fig. 4a-4d are schematic diagrams illustrating the gear control of the fan motor according to the embodiment of the present invention.

FIG. 5 is a flow chart of the control of the gear positions of the fan motor according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The embodiment provides a drying machine, and the motor is mainly realized when starting high-grade, and the automatic start low-grade is several seconds, then starts high-grade, need not artifical low-grade of starting earlier and then starts the operation of high-grade, and the starting current is little in the twinkling of an eye of guaranteeing circulating fan, and the moment of torsion is little, and the fan is difficult to burn out, guarantees the fan life-span.

The following describes the dryer of the present embodiment with reference to the accompanying drawings:

as shown in fig. 3, the indoor unit is installed in the heating chamber to supply heat to the drying chamber; the outdoor unit is connected with the indoor unit; the circulating fan is arranged above the indoor unit and used for transferring heat to the drying chamber and enabling the temperature in the drying chamber to be uniformly distributed; placing tobacco leaves in the drying chamber; the opening angle of the fresh air door can be adjusted, and outdoor air is controlled to enter the heating chamber under the action of the circulating fan and then reach the drying chamber; after the fresh air enters, the moisture discharging port is automatically opened to discharge the moisture from the drying chamber under the action of pressure.

As shown in fig. 4a to 4d, a dryer includes a switch module-a rotary switch, a control module-a main control chip and a motor.

The switching module is used for generating a first input signal 1, a second input signal 2, a third input signal 3 and a fourth input signal 4.

The switch module includes a first pin 1, a second pin 2, a third pin 3, a fourth pin 6, a fifth pin 5, a sixth pin 6, a seventh pin 7, and an eighth pin 8.

The first pin 1, the third pin 3, the fifth pin 5 and the seventh pin 7 are connected to ground, and the second pin 2, the fourth pin 4, the sixth pin 6 and the eighth pin 8 are pulled up to +5V of a power supply through resistors R1-R4.

The first pin 1 and the second pin 2 generate a first input signal 1-low level when being conducted, the third pin 3 and the fourth pin 4 generate a second input signal 2-low level when being conducted, the fifth pin 5 and the sixth pin 6 generate a third input signal 3-low level when being conducted, and the seventh pin 7 and the eighth pin 8 generate a fourth input signal-low level when being conducted.

Wherein, the switch module is a rotary mechanical type manual switch.

The control module is used for controlling the motor to operate at the second gear for a first set time and then operate at the first gear when receiving the first input signal 1; the controller is used for controlling the motor to operate at a second gear when receiving a second input signal 2; the motor is controlled to stop running when receiving the third input signal 3; for automatically controlling the operating state of the motor according to the baking program upon receiving the fourth input signal 4.

The control module is used for controlling the motor to operate in the first gear for the first set time in the second gear and controlling the motor to operate in the first gear after being powered off for the second set time when receiving the first input signal 1. The second set time is less than the first set time to ensure that the gear switching is successful.

And the control module is used for controlling the motor to operate in a second gear after the motor is powered off for a second set time when receiving the second input signal 2 so as to ensure that the gear switching is successful.

The motor is used for driving the fan to rotate.

The drying-machine of this embodiment includes motor power supply circuit, and control module controls power supply circuit's state in order to control the gear of motor, and is specific, and power supply circuit includes:

the first switch CMC1 has one end connected to power sources L1, L2 and L3 and the other end connected to low-gear input ends Ulow, Vlow and Wlow of the motor.

And one end of the second switch CMC2 is connected with the power supplies L1, L2 and L3 in a chain mode, and the other end of the second switch CMC2 is connected with the high-grade input ends Uhigh, Vhigh and Whigh of the motor.

And one end of the third switch CMC3 is in short circuit, and the other end of the third switch CMC3 is connected with a low-gear input end U low, V low and W low of the motor.

The control module is used for controlling the first switch CMC1 to be closed for a first set time and then controlling the first switch CMC1 to be opened, the second switch CMC2 and the third switch to be closed CMC3 when receiving a first input signal 1;

preferably, the control module controls the first switch CMC1 to open for a second set time before controlling the second switch CMC2 and the third switch CMC3 to close.

The control module is configured to control the first switch CMC1 to be closed and the other switches to be open when receiving the second input signal 2.

Preferably, the control module is configured to control the second switch CMC2 and the third switch CMC3 to open for a second set time and then control the first switch CMC1 to close when receiving the second input signal 2.

The control module is adapted to control the first switch CMC1, the second switch CMC2 and the third switch CMC3 to open when receiving the third input signal 3.

The rotary mechanical manual switch of the embodiment does not directly control the conduction of the high-grade and the low-grade, but obtains the state of the rotary switch through the control module, and then controls the alternating current contactor to be switched on and off according to the state of the rotary mechanical manual switch, so that the conduction of the high-grade and the low-grade of the circulating fan is controlled.

Specifically, as shown in fig. 4a to 4d, pins 1, 3, 5, and 7 of the rotary switch are short-circuited and connected to the ground, pins 2, 4, 6, and 8 of the rotary switch are connected to the input signal 1, input signal 2, input signal 3, and input signal 4 of the main control chip after being pulled up to 5V through resistors R1, R2, R3, and R4, respectively, pins 2, 4, CMC1 control signal, CMC2 control signal, and CMC3 control signal are connected to CMC1, CMC2, and CMC3 ac contactor, respectively, an input end of the CMC1 ac contactor is connected to L1, L2, and L3, an output end of the CMC2 ac contactor is connected to U low, V low, and W low of the circulating fan, an input end of the CMC2 ac contactor is connected to L1, L2, and L3, an output end of the CMC3 ac contactor is short-circuited, and an output end of the circulating fan is connected to U low, V low, W high, and W high.

The main control chip detects the state of the rotary switch.

1. The rotary switch is shifted to a high-speed gear:

1) the detection input signal 1 is low.

2) The output signal of the CMC1 is controlled to be high level, the AC contactor CMC1 is closed and kept for 5 seconds, and the motor is operated at a low gear.

3) The output signal of the CMC1 is controlled to be low level, and the AC contactor CMC1 is disconnected and delayed for 0.1 second.

4) And controlling the output signal of the CMC2 and the output signal of the CMC3 to be high level, closing the AC contactors CMC2 and CMC3, and operating the motor in high grade.

2. The rotary switch is shifted to a low-speed gear:

1) the detection input signal 2 is low.

2) Controlling the output signal of the CMC2 and the output signal of the CMC3 to be low level, and disconnecting the AC contactors CMC2 and CMC3 and delaying for 0.1 second

3) The output signal of the CMC1 is controlled to be high level, the AC contactor CMC1 is closed, and the motor runs at a low gear.

3. The rotary switch is shifted to a stop gear position:

1) the detection input signal 3 is low.

2) And controlling the output signals of the CMC1, the CMC2 and the CMC3 to be low level, disconnecting the AC contactors CMC1, CMC2 and CMC3, and stopping the motor.

4. The rotary switch is shifted to an 'automatic' gear:

1) the detection input signal 4 is low.

2) And (3) operating an automatic control mode, and automatically controlling the running state of the fan by software according to the baking process, wherein the method comprises the steps of 1, 2 and 3.

As shown in fig. 5, the method for controlling the fan of the roaster comprises the following steps:

and S1, starting the computer.

And S2, operating the rotary switch.

S3, judging whether the detection input signal 1 is low level, if yes, going to step S4, otherwise, going to step S7.

And S4, controlling the output signal of the CMC1 to be high level, closing the AC contactor CMC1 and keeping for 5 seconds, and operating the motor at a low gear.

And S5, controlling the output signal of the CMC1 to be low level, and disconnecting the AC contactor CMC1 and delaying for 0.1 second.

And S6, controlling the output signal of the CMC2 and the output signal of the CMC3 to be in high level, closing the AC contactors CMC2 and CMC3, and operating the motor in high grade. The process advances to step S3.

S7, determining that the detection input signal 2 is low, if yes, proceeding to step S8, otherwise, proceeding to step S10.

And S8, controlling the output signal of the CMC2 and the output signal of the CMC3 to be low level, and disconnecting the AC contactor CMC2 and the CMC3 and delaying for 0.1 second.

And S9, controlling the output signal of the CMC1 to be high level, closing the AC contactor CMC1, and operating the motor at a low gear. The process advances to step S3.

S10, judging whether the detection input signal 3 is low level, if yes, going to step S11, otherwise, going to step S12.

And S11, controlling the output signal of the CMC1, the output signal of the CMC2 and the output signal of the CMC3 to be low level, and disconnecting the motor from running by the AC contactors CMC1, CMC2 and CMC 3. The process advances to step S3.

S12, it is determined that the detection input signal 4 is at low level, and if so, the process proceeds to step S13.

And S13, operating an automatic control mode. The process advances to step S3.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A dryer, characterized by comprising:

the switching module is used for generating a first input signal, a second input signal and a third input signal;

the motor is used for driving the fan to rotate;

the power supply circuit includes:

one end of the first switch is connected with a power supply, and the other end of the first switch is connected with a low-gear input end of the motor;

one end of the second switch is connected with a power supply, and the other end of the second switch is connected with a high-grade input end of the motor;

one end of the third switch is in short circuit, and the other end of the third switch is connected with the low-gear input end of the motor;

the control module is used for controlling the first switch to be closed for a first set time and then controlling the first switch to be opened, and the second switch and the third switch to be closed when receiving a first input signal;

the control module is used for controlling the first switch to be closed when receiving a second input signal;

the control module is used for controlling the first switch, the second switch and the third switch to be switched off when receiving a third input signal.

2. The dryer of claim 1, wherein the control module is configured to control the motor to operate in the second gear for a first set time and to control the motor to operate in the first gear after being powered off for a second set time when receiving the first input signal.

3. The dryer of claim 1, wherein the control module is configured to control the motor to operate in the second gear after being powered off for a second set time period when receiving the second input signal.

4. The dryer of claim 1, wherein the control module is configured to control the first switch to be turned off for a second set time and then to control the second switch and the third switch to be turned on when receiving the first input signal.

5. The dryer of claim 1, wherein the control module is configured to control the second switch and the third switch to be turned off for a second set time and then to control the first switch to be turned on when receiving a second input signal.

6. The dryer of any one of claims 1-5, wherein said switch module is configured to generate a fourth input signal, and said control module is configured to automatically control an operation status of said motor according to a toasting program when said fourth input signal is received.

7. The dryer of any one of claims 1 to 5, wherein said switch module is a mechanical manual switch.

8. The dryer according to any one of claims 1 to 5, wherein the switch module comprises a first pin, a second pin, a third pin, a fourth pin, a fifth pin and a sixth pin, the first pin, the third pin and the fifth pin are connected to ground, the second pin, the fourth pin and the sixth pin are pulled up to a power supply through a resistor, the first pin and the second pin generate a first input signal when being conducted, the third pin and the fourth pin generate a second input signal when being conducted, and the fifth pin and the sixth pin generate a third input signal when being conducted.

9. The dryer of claim 8, wherein the switch module includes a seventh pin and an eighth pin, the seventh pin is connected to ground, the eighth pin is pulled up to a power source through a resistor, and the seventh pin and the eighth pin generate a fourth input signal when conducting.