CN110986512A

CN110986512A - Dehumidifying and drying nursing instrument

Info

Publication number: CN110986512A
Application number: CN201911379307.6A
Authority: CN
Inventors: 徐斌; 吴秋麒; 任国峰
Original assignee: Suzhou Liren Hearing Equipment Co ltd
Current assignee: Suzhou Liren Hearing Equipment Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-10

Abstract

The invention relates to a dehumidifying and drying nursing instrument which comprises a shell, wherein the shell is arranged in a hollow structure; the dehumidifying and heating device is characterized in that a dehumidifying and heating container is arranged in the casing, a vacuum pump is further arranged in the casing and is opposite to the dehumidifying and heating container, and a control device is arranged on the top surface of the casing. The invention can realize high-efficiency drying and dehumidification of products.

Description

Dehumidifying and drying nursing instrument

Technical Field

The invention relates to a nursing instrument, in particular to a dehumidifying and drying nursing instrument.

Background

Hearing aids are a tool that help hearing impaired people to ameliorate the hearing impairment and thereby improve their ability to converse with others. The hearing aid wearing population is mostly old people and disabled people, the body of the old people and the disabled people is weak, the resistance is poor, the hearing aid is used after being plugged in the ear for a long time, and due to the fact that the hearing aid is infected with sweat and earwax, bacteria and viruses are easy to breed, and the health of people is damaged, and therefore, the improvement of the sanitation condition of the old people and the disabled people is very important. Furthermore, the hearing aid is inevitably subjected to moisture from the air and the ear during use, so that moisture removal is an essential measure during routine maintenance.

In view of the above-mentioned drawbacks, the present designer is actively making research and innovation to create a new dehumidifying and drying nursing apparatus, which has a higher industrial utilization value.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a dehumidifying and drying nursing instrument.

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

a dehumidifying and drying nursing instrument comprises a machine shell, wherein the machine shell is arranged in a hollow structure;

the dehumidifying and heating device is characterized in that a dehumidifying and heating container is arranged in the casing and hung on the top surface of the casing, a middle interlayer is arranged in the dehumidifying and heating container and divides the dehumidifying and heating container into a dehumidifying and drying chamber and a heating chamber, a plurality of through holes are arranged on the middle interlayer and are distributed on the middle interlayer at intervals, the dehumidifying and drying chamber is communicated with the heating chamber, a mounting hole is arranged at the bottom end of the heating chamber, a semiconductor refrigerator is arranged in the mounting hole, the hot end surface of the semiconductor refrigerator faces the heating chamber, the cold end surface of the semiconductor refrigerator faces the outer side and protrudes out of the bottom of the dehumidifying and heating container, a radiator is arranged on the hot end surface of the semiconductor refrigerator, a condensing sheet is arranged on the cold end surface of the semiconductor refrigerator, an air inlet is arranged at the bottom end of the heating chamber, an electromagnetic valve is arranged, the ultraviolet light source is arranged around the periphery of the dehumidifying and drying chamber, the periphery of the dehumidifying and drying chamber is provided with an air exhaust pipeline which is attached to the ventilating holes, the air exhaust pipeline is also provided with ventilating holes which are arranged in one-to-one correspondence with the ventilating holes on the dehumidifying and drying chamber, so that the air exhaust pipeline is communicated with the dehumidifying and drying chamber, and the inner wall of the dehumidifying and drying chamber is provided with three UV-LED luminous tubes which are uniformly distributed on the inner wall of the dehumidifying and drying chamber in equal parts;

a vacuum pump and a dehumidifying and heating container are also arranged in the casing, and the vacuum pump communicating pipe is communicated with an air exhaust pipeline;

the top surface of the casing is provided with a control device which is arranged opposite to the dehumidifying and heating container, is arranged above the vacuum pump and is electrically connected with the vacuum pump and the electromagnetic valve.

Preferably, the dehumidifying and drying care instrument is characterized in that the dehumidifying and heating container is arranged in a sandwich structure, wherein the inner layer is a metal layer, and the outer layer is an insulating layer.

Preferably, in the dehumidifying and drying nursing apparatus, the vacuum pump is fixedly arranged on the metal bottom plate of the casing through the shock pad.

Preferably, the dehumidifying, drying and nursing instrument comprises a PCB control circuit and an LCD display touch controller, wherein the PCB control circuit is connected with the LCD display touch controller, a main power supply unit, a first auxiliary power supply unit, a second auxiliary power supply unit, a vacuum pump loop unit, a pressure relief loop unit, a UV-LED driving loop unit, an MCU unit, a voltage reduction and silencing loop unit, an alarm loop unit, a constant temperature heating unit, a temperature and humidity acquisition unit and a pressure acquisition unit are arranged on the PCB control circuit, the input end of the main power supply unit is connected with an external DC12V, the output end of the main power supply unit is connected with the input end of the second auxiliary power supply unit, the output end of the second auxiliary power supply unit is connected with the input end of the LCD display touch controller, the output end of the main power supply unit is also connected with the input end of the first auxiliary power supply unit, the output end of the first auxiliary power supply unit is connected with the power supply ends of the main control MCU unit, the voltage reduction noise circuit unit, the alarm circuit unit, the constant temperature heating unit, the temperature and humidity acquisition unit and the pressure acquisition unit, the output ends of the temperature and humidity acquisition unit and the pressure acquisition unit are connected with the input end of the MCU unit, the control end of the MCU unit is connected with the controlled ends of the voltage reduction noise circuit unit, the alarm circuit unit and the constant temperature heating unit, the output end of the MCU unit is connected with the input end of the LCD display touch controller, the output end of the main power supply unit is connected with the power supply ends of the vacuum pump circuit unit, the pressure relief circuit unit and the UV-LED drive circuit unit, and the control end of the MCU unit is further connected with the controlled ends of the vacuum pump circuit unit, the pressure relief circuit unit and the UV-LED.

Preferably, the dehumidifying and drying nursing instrument comprises a vacuum pump control loop unit, wherein the vacuum pump control loop unit comprises a current limiting resistor R1, a photocoupler OC1, voltage dividing resistors R2 and R3, and a MOS transistor VT1, one end of the current limiting resistor R1 is connected to 5V, and the other end of the current limiting resistor R1 is connected to a first pin of the photocoupler OC 1; a second pin of the photoelectric coupler OC1 is connected with a twenty-sixth pin of the main control MCU unit, and a third pin of the photoelectric coupler OC1 is connected with the MOS transistor VT1 through voltage dividing resistors R2 and R3; a fourth pin of the photoelectric coupler OC1 is connected with a DC12V power supply, and the MOS tube VT1 is connected with the first vacuum pump;

the second vacuum pump control loop is composed of a current-limiting resistor R1, a photoelectric coupler OC2, a voltage-dividing resistor R4, a R5, a MOS tube VT2, a diode VD2 and a diode VD3, one end of the current-limiting resistor R1 is connected with a first pin of the photoelectric coupler OC2, a second pin of the photoelectric coupler OC2 is connected with a twenty-seventh pin of the main control MCU unit, and a third pin of the photoelectric coupler OC2 is connected with the MOS tube VT2 through the voltage-dividing resistors R4 and R5; the fourth pin of the photoelectric coupler OC1 is connected with a DC12V power supply, and the MOS tube VT2 is connected with the second vacuum pump through a diode VD2 and a diode VD 3.

Preferably, the dehumidifying and drying nursing instrument comprises a UV-LED driving circuit unit including a chip U1, a third pin of the chip U1 is suspended, a first pin of the chip U1 is connected to an anode of a diode VD1, a cathode of the diode VD1 is connected to a resistor R8, a capacitor C2 and a resistor R9, the fifth pin of the chip U1 is connected to a cathode of a diode VD1, a fourth pin and a sixth pin of the chip U1 are connected to one end of an inductor L1, the other end of the inductor L1 is connected to an anode of a diode VD1, a second pin of the chip U1 is grounded, connected to a capacitor C1, and connected to a photocoupler OC3 through a MOS transistor VT3, wherein the chip U1 is SY 7200.

Preferably, the dehumidifying and drying nursing instrument comprises a constant temperature heating unit which comprises a MOS transistor VT4, a drain of the MOS transistor VT4 is connected with a cold junction of the semiconductor refrigerator, a source of the MOS transistor VT4 is grounded, and a gate of the MOS transistor VT4 is connected with the MCU unit.

Preferably, the dehumidifying and drying care instrument comprises a pressure sensor module, a first pin, a fourth pin and a sixth pin of the pressure sensor module are all arranged in a suspended manner, a third pin of the pressure sensor module, a resistor R10 and a resistor R11 which are connected in series, are connected to a grid of a Metal Oxide Semiconductor (MOS) transistor VT5 and are connected with the MCU, a drain of the MOS transistor VT5 is connected to 5V, a source of the MOS transistor VT5 is connected to a second pin of the pressure sensor module and is also connected with a resistor R10, a fifth pin of the pressure sensor module is connected with the MCU through a resistor R12 and a capacitor C3 which are connected in parallel, wherein the model of the pressure sensor module is XGZP 6847.

Preferably, the dehumidifying and drying nursing instrument comprises a pressure relief circuit unit, wherein the pressure relief circuit unit comprises a photocoupler OC4, a fourth pin of the photocoupler OC4 is connected with 12V, a third pin of the photocoupler OC4 is connected with a MOS (metal oxide semiconductor) tube VT6 through voltage dividing resistors R13 and R14, and the MOS tube VT6 is connected with 12V through a pressure relief valve.

Preferably, the dehumidifying and drying care instrument has the MCU of a single chip microcomputer with the model of STC15W1K08 PWM.

By the scheme, the invention at least has the following advantages:

1. the invention can quickly raise the temperature inside the dehumidifying and heating container through the structure of the dehumidifying and heating container, thereby ensuring that the product can be dried and dehumidified efficiently.

2. According to the invention, the first vacuum pump and the second vacuum pump are switched to realize pressure reduction and noise reduction, the heat preservation effect of the insulating heat-insulating material on the outer layer of the container, and the recycling of the damp and hot waste gas of the coil pipe is used for auxiliary heating.

3. The invention can ensure the grounding of the dehumidifying and heating container through the grounding connecting wire and ensure the safety in the dehumidifying and heating container.

4. The invention can realize high-efficiency automatic treatment through the control device, does not need to be operated by an operator, can be finished by one key, and is quick and convenient.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

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 embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a connection diagram of the internal structure of the control device of the present invention;

FIG. 3 is a circuit diagram of the power supply of the present invention;

FIG. 4 is a circuit diagram of a first vacuum pump circuit unit and a second vacuum pump circuit unit of the present invention;

FIG. 5 is a circuit diagram of a UV-LED drive loop unit of the present invention;

FIG. 6 is a circuit diagram of the thermostatic heating unit of the present invention;

FIG. 7 is a pin diagram of a master MCU unit of the present invention;

FIG. 8 is a circuit diagram of a pressure pick-up unit of the present invention;

fig. 9 is a circuit diagram of the pressure relief circuit unit of the present invention;

FIG. 10 is a circuit diagram of an alarm loop unit of the present invention;

fig. 11 is a schematic view of the internal structure of fig. 1.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In order to make the technical solutions of the present invention better understood, 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. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1 and fig. 11, a dehumidifying, drying and nursing apparatus includes a casing 1, wherein the casing 1 is hollow;

a dehumidifying and heating container 2 is arranged in the machine case 1 and hung on the top surface of the machine case 1, a middle partition layer 201 is arranged in the dehumidifying and heating container 2, the dehumidifying and heating container 2 is divided into a dehumidifying and drying chamber 203 and a heating chamber 204, a plurality of through holes 212 are arranged on the middle partition layer 201 and are distributed on the middle partition layer 201 at intervals, the dehumidifying and drying chamber 203 and the heating chamber 204 are communicated, a mounting hole is arranged at the bottom end of the heating chamber 204, a semiconductor refrigerator 202 is arranged in the mounting hole, wherein the hot end surface of the semiconductor refrigerator 202 faces the heating chamber, the cold end surface faces the outside and is arranged to protrude out of the bottom of the dehumidifying and heating container 2, a radiator 205 is arranged on the hot end surface of the semiconductor refrigerator 202, a condensing sheet 206 is arranged on the cold end surface, a vent hole 207 is arranged at the bottom end of the heating chamber 204, an electromagnetic valve 210 is arranged on the vent hole 207, and a plurality of vent holes 208 are, the ultraviolet light source is arranged around the periphery of the dehumidifying and drying chamber 203, an air exhaust pipeline 209 is arranged around the periphery of the dehumidifying and drying chamber 203 and is attached to the vent hole 208, the vent hole 208 is also formed in the air exhaust pipeline 209 and is arranged corresponding to the vent hole on the dehumidifying and drying chamber 203 one by one, so that the air exhaust pipeline 209 is communicated with the dehumidifying and drying chamber 203, and three UV-LED light-emitting tubes 211 are arranged on the inner wall of the dehumidifying and drying chamber 203 and are uniformly distributed on the inner wall of the dehumidifying and drying chamber 203 in equal parts;

a vacuum pump 3 and a dehumidifying and heating container 2 are also arranged in the machine shell 1, and a communicating pipe 4 of the vacuum pump 3 is communicated with an air exhaust pipeline 209;

the top surface of the machine shell 1 is provided with a control device 6 which is arranged opposite to the dehumidifying and heating container 2, is arranged above the vacuum pump 3, and is electrically connected with the vacuum pump 3 and the electromagnetic valve 210.

The dehumidifying and heating container 2 is of a double-layer structure, wherein the inner layer is a metal layer, and the outer layer is an insulating layer, so that static electricity can be effectively isolated. A plurality of circles of hollow metal pipes are coiled in the interlayer around the whole height of the metal inner container, and the upper port of the coil pipe is connected with the exhaust port of the vacuum pump; the lower port is directly communicated with the outside.

The vacuum pump 3 is fixedly arranged on the machine shell 1 through the shock absorption pad 5, so that the vacuum pump 4 is prevented from generating vibration noise when working, and the use quality is prevented from being influenced. The bottom of the case 1 is a metal soleplate (7)

In the invention, the dehumidifying and heating container 2 is also provided with a top cover, and the bottom surface of the machine shell is made of metal materials.

The most parts of the components in the invention are patch components, and are welded on a double-sided PCB by applying the surface mounting technology. Almost all components are supported by the PCB board carrier and the electrical connections between the electronic components are completed.

The semiconductor refrigerator 202 has an operation mechanism that an N-type semiconductor particle and a P-type semiconductor particle are welded into an electric couple pair by a metal connecting sheet, and when direct current flows from an N pole to a P pole, heat absorption phenomena are generated at 2 and 3 ends, which are called cold ends; and the heat release phenomenon is generated at the

ends

1 and 4 below, and is called as hot end.

The semiconductor refrigerator is used as heating body, and the principle of direct heat conduction is first applied, the hot end of the semiconductor refrigerating assembly is closely attached to aluminum radiator with excellent heat conducting performance, and the contact plane of the radiator must be greater than that of the refrigerating assembly. Thin and uniform heat-conducting silicone grease is coated between the hot end plane of the refrigeration component and the contact plane of the radiator, between the contact plane of the radiator and the bottom surface of the metal inner layer in advance to reduce thermal resistance, and the heat-conducting silicone grease is fastened by screws to ensure that the heat-conducting silicone grease is tightly contacted.

The semiconductor refrigerator is electrified, then the cold end performs heat pumping refrigeration, the hot end releases heat and directly conducts the heat to the radiator, and the fins of the radiator greatly expand the contact surface with air and conduct the heat to the metal inner layer of the container and the air in contact with the metal inner layer.

The inner layer of the heating and drying container is thin metal, the bottom surface of the heating and drying container is closely contacted with the plane of the radiator beyond the hot end surface of the refrigerating component, the heat conducted by the radiator can be conducted to the air contacted with the radiator, meanwhile, the surface of the inner layer of the metal is smooth and clean and is closely contacted with the radiator, the inner layer of the metal can also be regarded as a part of a heat source, the heat can be radiated to an object to be dried in the drying chamber, and therefore, the heating and drying container has the functions of heat conduction and heat radiation.

The cold end face of the semiconductor refrigerator is additionally connected with a condensing sheet, cold air is diffused to the periphery, the temperature difference is enlarged, and the heat efficiency is improved.

After the hot air is heated, the natural convection effect of heat conduction plays a leading role, the hot air rises to pass through the through holes of the middle partition layer from the heating chamber to enter the dehumidifying and drying chamber, the temperature of the dehumidifying and drying chamber is increased, and therefore the evaporation of moisture of the dried object is accelerated.

Moisture extraction:

the dehumidifying function of the invention is undertaken by the vacuum pump, the diaphragm inside the pump body reciprocates under the drive of the motor, thus compressing and stretching the air in the pump cavity with fixed volume to form vacuum, namely generating negative pressure, generating pressure difference between the air suction opening of the pump and the external atmospheric pressure, and under the action of the pressure difference, the air in the drying chamber is pressed and sucked into the pump cavity and then discharged from the air outlet, and cold air is continuously injected from the air inlet. The vacuum pump continuously pumps the object to be dried and the moisture in the drying chamber out of the machine, thereby playing a drying role.

Vacuumizing:

the vacuum pump pumps out the gas in the closed container, so that the gas in the closed container is less and less to form negative pressure, the boiling point of water in the closed container is correspondingly reduced to boil in advance, and the water on the surface and the deep layer of the object is violently evaporated, gasified and escaped.

When the device is in specific work,

the air inlet/207 is arranged at the position close to the bottom and is controlled to be switched on and off by a pressure relief electromagnetic valve, the air suction port is arranged on the side wall of the upper port, cold air enters from the bottom, hot air is sucked from the top, and the convection effect is enhanced in the whole process of flowing through.

The air exhaust is large in flow and high in speed, hot air continuously and quickly enters the drying chamber, and a large amount of heat energy is transferred to accelerate the drying speed.

Starting the equipment, opening the electromagnetic valve to keep an air inlet channel smooth, and simultaneously heating and drying at constant temperature; and simultaneously performing vacuum dehumidifying and drying. The double functions strengthen the effect of heating natural convection and convert the natural convection into other forced convection. When the temperature of the drying chamber reaches the set upper limit of 55 ℃, the MCU unit instructs to close the pressure relief electromagnetic valve to close the air inlet channel, the whole heating and drying chamber becomes a closed container, then the vacuum pump is changed from dehumidification to vacuum pumping to establish a negative pressure small environment, the boiling point is correspondingly reduced because the vacuum degree is gradually increased, the maximum vacuum degree of the GDMPJD-1/2 type vacuum pump selected by the invention can reach-96 kpa, and when the vacuum degree reaches-93 kpa, the boiling point of water is reduced to about 45 ℃, the preheating temperature in the container is higher than the boiling point, so that the moisture on the surface and the deep layer in the object to be dried in the drying chamber boils, is violently evaporated, gasified and escaped, and is pumped out by the vacuum pump, thereby realizing rapid and thorough drying.

Example one

As shown in fig. 2, the control device 6 includes a PCB control circuit and an LCD display touch controller, the PCB control circuit is connected to the LCD display touch controller, the PCB control circuit is provided with a main power unit 601, a first auxiliary power unit 602, a second auxiliary power unit 603, a vacuum pump loop unit 604, a pressure relief loop unit 606, a UV-LED driving loop unit 607, an MCU unit 608, a voltage reduction and noise reduction loop unit 609, an alarm loop unit 610, a constant temperature heating unit 611, a temperature and humidity acquisition unit 612, and a pressure acquisition unit 605, an input end of the main power unit 601 is connected to DC12V, an output end of the main power unit 601 is connected to an input end of the second auxiliary power unit 603, an output end of the second auxiliary power unit 603 is connected to an input end of the LCD display touch controller, an output end of the main power unit 601 is further connected to an input end of the first auxiliary power unit 602, the output end of the first auxiliary power supply unit 603 is connected with the power supply ends of the voltage reduction and noise reduction loop unit 609, the alarm loop unit 610, the constant temperature heating unit 611, the temperature and humidity acquisition unit 612 and the pressure acquisition unit 605, the output ends of the temperature and humidity acquisition unit 612 and the pressure acquisition unit 605 are connected with the input end of the main control MCU unit 608, the control end of the MCU unit 608 is connected with the controlled ends of the voltage reduction and noise reduction loop unit 609, the alarm loop unit 610 and the constant temperature heating unit 611, the output end of the MCU unit 608 is connected with the input end of the LCD display touch controller, the output end of the main power supply unit 601 is connected with the power supply ends of the vacuum pump loop unit 604, the pressure relief loop unit 606 and the UV-LED drive loop unit 607, the control terminal of the MCU unit 608 is also connected to the controlled terminals of the vacuum pump circuit unit 604 pressure relief circuit unit 606 and the UV-LED driving circuit unit 607.

As shown in fig. 3, 220V ac power is introduced from a power socket, and the power switch is a double-pole single-throw switch to control the on-off of the power supply; the temperature control switch is used for overheat protection; the overvoltage protection of the piezoresistor absorbs surge voltage; the capacitance and inductance in the circuit are designed to suppress the series mode interference.

The power transformer transforms 220V alternating current into 20V low voltage, the low voltage is rectified into direct current through a full bridge, and after capacitor filtering, the direct current 28V is stabilized by a three-terminal voltage stabilizer 7812 to obtain +12V, which is a main power supply.

The first auxiliary power supply unit is a working power supply of the control loop, is led out from a main power supply DC12.0V, passes through an isolation diode, is stabilized by a chip 7805, and outputs DC5.0V.

7805 is a fixed output three-terminal linear voltage-stabilized power supply module, and has the characteristics of simple structure, few peripheral elements, convenient use, low output noise and the like.

The second auxiliary power supply unit is specially arranged for a 3.5-inch color liquid crystal touch screen, is led out from the main power supply DC12.0V, passes through AN isolation diode, is stabilized by AN7703, and outputs DC3.0V.

Example two

On the basis of the first embodiment, as shown in fig. 4, the vacuum pump loop unit 604 of the present invention includes a first vacuum pump control loop, which is composed of a current limiting resistor R1, a photocoupler OC1, voltage dividing resistors R2, R3, and a MOS transistor VT1, wherein one end of the current limiting resistor R1 is connected to 5V, and the other end is connected to a first pin of the photocoupler OC 1; a second pin of the photoelectric coupler OC1 is connected with a twenty-sixth pin of the main control MCU unit, and a third pin of the photoelectric coupler OC1 is connected with the MOS transistor VT1 through voltage dividing resistors R2 and R3; a fourth pin of the photoelectric coupler OC1 is connected with a DC12V power supply, and the MOS tube VT1 is connected with the first vacuum pump;

The virtual button is started by touch control, the main control MCU unit instructs the twenty-sixth pin to output low level, and the +5V power supply is conducted to form a loop through forward bias of a light emitting diode at the moment through the current limiting resistor R1 and the light emitting diode of the photoelectric coupler OC 1; the phototriode of the photoelectric coupler OC1 is turned on by illumination, and the main power supply +12V is connected to the ground through the phototriode of the photoelectric coupler OC1 and the divider resistors R2 and 2R3 to form a loop. The loop current flows through the resistor R3, the voltage drop generated on the resistor R3 is the gate bias voltage of the MOS transistor VT1, and the MOS transistor VT1 is conducted to connect the main power supply DC12V to the vacuum pump, so that the vacuum pump is electrified and operated.

When the vacuum pump is started, the starting current is relatively large, so that the first power supply channel formed by the loop of the MOS tube VT1 is used for supplying power in a sufficient amount.

After the vacuum pump runs for 20s, the vacuum pump and the vacuum pump run stably, and the working current is reduced to a certain extent and becomes normal. At the moment, the twenty-seventh lead of the MCU unit outputs low level, and the +5V power supply is conducted to form a loop through the current-limiting resistor R1 and the light-emitting diode of the photoelectric coupler OC2 by forward biasing; the phototriode of the photoelectric coupler OC2 is turned on by illumination, and the main power supply +12V is connected to the ground through the phototriode of the photoelectric coupler OC2 and the divider resistors R4 and R5 to form a loop. The loop current flows through a resistor R5, the voltage drop generated on the resistor R5 is the gate bias voltage of a MOS tube VT2, the MOS tube VT2 is conducted, the main power supply DC12V is also connected to a vacuum pump, and the loop is +12V, the vacuum pump, a diode VD2, a diode VD3 and the MOS tube VT2 to the ground. Except that a diode VD2 and a diode VD3 are connected in series in a power supply loop of the MOS tube VT2, and the +12V power supply needs to overcome the tube voltage drop of the diode VD2 and the diode VD3, so that the power supply voltage applied to the vacuum pump is only 10.6V.

Meanwhile, the main control MCU unit instructs the twenty-sixth pin to output high level, the light emitting diode of the photoelectric coupler OC1 is reversely biased and cut off, the phototriode of the photoelectric coupler OC1 loses illumination and is cut off, the grid voltage loop of the MOS transistor VT1 is interrupted, the MOS transistor VT1 is cut off, and the MOS transistor VT1 loop stops supplying power to the vacuum pump. The vacuum pump is switched from the power supply loop of the MOS transistor VT1 to the power supply loop of the MOS transistor VT 2. The vacuum pump enters a decompression operation state, the operation noise is obviously reduced, the noise-reduction operation is realized, and the product quality and the reliability are improved.

And after timing is finished, the main control MCU unit instructs the twenty-seventh pin to output high level, the photoelectric coupler OC2 is cut off, the MOS tube VT2 is cut off, the power supply path of the MOS tube VT2 is interrupted, and the vacuum pump is turned off when power is lost.

The vacuum pump is connected across a reverse diode VD1 for discharging the back electromotive force generated by the vacuum pump motor.

EXAMPLE III

On the basis of the first embodiment, as shown in fig. 5, the UV-LED driving circuit unit 607 includes a chip U1, a third pin of the chip U1 is suspended, a first pin of the chip U1 is connected to an anode of a diode VD1, a cathode of the diode VD1 is connected to a resistor R8, a capacitor C2 and a resistor R9, a fifth pin of the chip U1 is connected to a cathode of a diode VD1, a fourth pin and a sixth pin of the chip U1 are connected to one end of an inductor L1, the other end of the inductor L1 is connected to an anode of a diode VD1, a second pin of the chip U1 is grounded and connected to a capacitor C1, and is connected to an opto-coupler OC3 through a MOS transistor VT3, where the chip U1 is SY7200, and is a DC/DC boost type LED driving module, which provides accurate constant current for driving LEDs and operates at a fixed switching frequency of 1 MHz.

According to the invention, the UV-LED lamp has a sterilization function, and three UV275-LED luminous tubes are equally arranged on the inner wall of the dehumidifying vacuum chamber. The UV275-LED luminous tube has small volume, low voltage operation, low power consumption, long service life and high reliability, emits ultraviolet light with the central wavelength of 275nm, and can achieve the effect of sterilizing the hearing aid in a short time. Because no medicament is used, no secondary pollution is generated, the hearing aid is not damaged, and the method is a safe and efficient green sterilization and disinfection method.

UV-LEDs, like transistors, are semiconductor structures and current control is more important than voltage control. In order to control the current, excess power must be guaranteed. This excess power causes problems with energy dissipation and heating, so UV-LEDs use constant current circuits instead of resistive current limiting.

The light output of the UV-LED is proportional to the forward current IF, which decreases by as much as 70% when the forward current IF is reduced from 350mA to 100 mA.

The UV-LED is a nonlinear device, a small change of a forward voltage VF can cause a large change of a forward current IF, the luminous intensity of the LED is determined by the current flowing through the LED, the LED is attenuated when the current is too strong, the luminous intensity of the UV-LED is influenced when the current is too weak, and therefore the constant working current of the UV-LED must be ensured.

The volt-ampere characteristic of the UV-LED changes by-2 mv/0 ℃ along with the temperature, the luminous flux of the UV-LED is in inverse proportion to the temperature, and the temperature change also has certain influence on the wavelength of the LED. All of the above require the UV-LED to be driven by a constant current source.

Wherein the content of the first and second substances,

a sixth pin of the chip U1 is a power input end;

the second pin of the chip U1 is a ground terminal;

one end of the capacitor C1 is connected to the sixth pin of the chip U1, and the other end is connected to the second pin of the chip U1, and the capacitor C1 is a decoupling filter capacitor at the power input end for filtering power noise to stabilize the operation of the driving module.

The first pin of the chip U1 is an inductance node, the inductance L1 is connected across the sixth pin and the first pin, and the first pin is connected directly to the drain of the MOS transistor VT3 in the driving circuit.

The first pin of the chip U1 is simultaneously connected with the anode of a diode VD1, and the cathode of the diode VD1 is connected with the C2, a resistor R8 and a fifth pin.

The capacitor C2 is an output filter capacitor, filters output ripples, reduces noise and stabilizes the working power supply of the UV-LED.

The fifth pin of the chip U1 is an overvoltage protection end, and an overvoltage protection signal is collected from the output end of the diode VD1 and is directly transmitted to the fifth pin.

The third pin of the chip U1 is a feedback terminal, and the resistance of the resistor R8 can be adjusted to adjust the magnitude of the UV-LED operating current. Feedback resistor R9 is adjusted to obtain the desired output voltage value.

The fourth pin of the chip U1 is an enable/dimming control terminal, and dimming can be performed by adjusting the duty ratio of the input pulse.

When the ultraviolet-LED sterilization disinfection device works, the pressure acquisition unit acquires negative pressure, and the UV-LED driving power supply can be electrified to work, and the UY-LED can be driven to be lighted to emit ultraviolet rays for sterilization and disinfection.

Example four

On the basis of the first embodiment, as shown in fig. 6, the constant temperature heating unit 611 includes a MOS transistor VT4, a drain of the MOS transistor VT4 is connected to the cold junction of the semiconductor refrigerator 202, a source of the MOS transistor VT4 is grounded, and a gate of the MOS transistor VT4 is connected to the main control MCU unit.

The circuit uses the semiconductor refrigerator 202 as a heating element, has the advantages of fast heating and fast temperature rise, and can reach the maximum temperature difference in less than one minute when the hot end is well radiated and the cold end is unloaded; also, since the semiconductor cooler 202 is a current transducing type device, the temperature can be controlled with high accuracy by controlling the input current. According to the invention, the second pin of the MCU unit receives temperature and humidity acquisition signals, and after the temperature and humidity acquisition signals are processed, the thirty-second pin outputs a modulation pulse width to be added to the grid of the power control field effect transistor, so that the power supply voltage of the semiconductor refrigeration component is adjusted by controlling the on and off of the power field effect transistor, and the working current of the semiconductor refrigeration component changes correspondingly, thereby realizing high-precision temperature control.

When the temperature is higher, the main control MCU unit receives the signal with higher temperature, and after operation, the output modulation is wide, the power fet is turned on and shortened, the operating voltage of the semiconductor refrigerator 202 is reduced, the operating current is correspondingly reduced, the heat generation is reduced, and the temperature falls back.

When the temperature is low, the main control MCU unit receives a low temperature signal, the twenty-fourth pin port outputs a modulation pulse width after operation processing, the MOS tube VT4 is conducted and prolonged, the working voltage of the semiconductor refrigerator 202 is increased, the working current is increased, the heating value is increased, the temperature is increased, and the constant temperature is achieved.

EXAMPLE five

On the basis of the first embodiment, as shown in fig. 8, the pressure acquisition unit 613 includes a pressure sensor module, a first pin, a fourth pin and a sixth pin of the pressure sensor module are all suspended, a third pin of the pressure sensor module, a resistor R10 and a resistor R11 connected in series, are connected to a gate of the MOS transistor VT5, and are connected to the MCU unit, a drain of the MOS transistor VT5 is connected to 5V, a source of the MOS transistor VT5 is connected to a second pin of the pressure sensor module, and is further connected to the resistor R10, a fifth pin of the pressure sensor module is connected to the MCU unit through a resistor R12 and a capacitor C3 connected in parallel, where the model of the pressure sensor module is XGZP 6847.

The pressure sensor is an XGZP6847 type pressure sensor and integrates a digital conditioning chip, a pressure sensor and a signal processing chip. Offset, sensitivity, temperature drift and non-linearity of the sensor are digitally compensated. The power supply voltage is used as a reference, and a standard voltage signal after calibration and temperature compensation is generated to be in a linear relation with pressure change.

The electromagnetic valve is closed, the master control MCU unit instructs the thirty-first pin to output high level, the MOS tube VT5 is opened, the power supply loop of the pressure sensor forms a passage, and the pressure sensor is electrified to work.

And a voltage signal reflecting the pressure change is output from a fifth pin of the pressure sensor and is output on a thirty-second pin of the MCU unit.

EXAMPLE six

On the basis of the first embodiment, as shown in fig. 9, the pressure relief circuit unit 606 includes a photocoupler OC4, a fourth pin of the photocoupler OC4 is connected to 12V, a third pin of the photocoupler OC4 is connected to the MOS transistor VT6 through voltage dividing resistors R13 and R14, and the MOS transistor VT6 is connected to 12V through a pressure relief valve.

And (4) finishing the vacuum dehumidification process, namely, even if the first vacuum pump and the second vacuum pump stop running, because the dehumidifying and heating container 2 has better sealing performance, the negative pressure in the dehumidifying and heating container 2 can be maintained for a period of time. In order to quickly take out the hearing aid which is well dehumidified and sterilized, the circular sealing cover can be easily taken down by touching the pressure relief virtual button.

Touch-control release virtual button, the main control MCU unit is through the twenty eighth pin output low level of operation instruction, then optoelectronic coupler OC4 effect, MOS pipe VT6 switches on then, and the electromagnetism relief valve circular telegram is opened, drenches heating container 2 and gradually tends towards the equilibrium with external atmospheric pressure, can easily take off circular sealed lid.

As shown in figure 10 of the drawings,

and (4) countdown ending prompt:

the countdown is decreased to be all zero, and the liquid crystal display LCD flickers at six time positions of all zero; and simultaneously giving out intermittent prompt tones.

Vacuumizing and air leakage alarming:

when the electromagnetic valve 210 is closed and leakage exists, negative pressure cannot be detected by pressure sampling, and the UV-LED driving power supply is cut off; the LCD two-bit pressure level flickers, and the buzzer 10B1 gives out a long and short alarm.

When UV leaks, the electromagnetic valve 210 is closed, negative pressure cannot be detected in pressure sampling, the UV-LED driving power supply is cut off, and meanwhile, audible and visual alarm is given.

And (3) static elimination: the inner wall and the middle partition layer of the heating and drying container are made of metal materials, and the safe grounding bolt is reliably connected with the metal bottom plate through a lead, so that static electricity can be effectively eliminated to protect the to-be-dried object.

The temperature and humidity acquisition unit is composed of a temperature and humidity sensor with the model number of SHT 71.

The SHT71 is a subminiature high-precision self-calibrating temperature/humidity composite sensor.

The temperature and humidity sensor applies CMOS micro-processing technology, the temperature and humidity sensor comprises a capacitance polymer humidity measuring element and an energy gap type temperature measuring element, and the temperature and humidity sensor is integrated with a 14-bit A/D converter element and a serial interface circuit on the same chip on the package of the device to realize seamless connection. The device also integrates an amplifier, a calibration data memory, a digital bus interface and a voltage stabilizer. The two-wire serial interface requires no additional circuitry. Therefore, the method has the advantages of excellent quality, ultra-fast response, strong anti-interference capability, extremely high cost performance and the like

On the basis of the first to sixth embodiments, as shown in fig. 7, the model of the MCU unit is an STC15W1K08PWM single chip microcomputer, and the link positions corresponding to model pins of the MCU unit are shown in table 1.

Table 1:

the invention has at least the following advantages:

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a take out dry care instrument that wets which characterized in that: the device comprises a machine shell (1), wherein the machine shell (1) is arranged in a hollow structure;

the dehumidifying and heating device is characterized in that a dehumidifying and heating container (2) is arranged in the machine shell (1) and hung on the top surface of the machine shell (1), a middle interlayer (201) is arranged in the dehumidifying and heating container (2), the dehumidifying and heating container (2) is divided into a dehumidifying and drying chamber (203) and a heating chamber (204), a plurality of through holes (212) are formed in the middle interlayer (201) and distributed on the middle interlayer (201) at intervals, the dehumidifying and drying chamber (203) and the heating chamber (204) are communicated, a mounting hole is formed in the bottom end of the heating chamber (204), a semiconductor refrigerator (202) is arranged in the mounting hole, wherein the hot end surface of the semiconductor refrigerator (202) faces the heating chamber, the cold end surface of the semiconductor refrigerator faces the outside and protrudes out of the bottom of the dehumidifying and heating container (2), a radiator (205) is arranged on the hot end surface of the semiconductor refrigerator (202), and a condensing sheet (206) is arranged on the, an air inlet (207) is formed in the bottom end of the heating chamber (204), an electromagnetic valve (210) is arranged on the air inlet (207), a plurality of vent holes (208) are formed in the top end of the dehumidifying and drying chamber (203), the vent holes are formed around the periphery of the dehumidifying and drying chamber (203), an air suction pipeline (209) is arranged around the periphery of the dehumidifying and drying chamber (203), the vent holes (208) are attached to the vent holes (208), the vent holes (208) are also formed in the air suction pipeline (209) and correspond to the vent holes in the dehumidifying and drying chamber (203) one by one, the air suction pipeline (209) is communicated with the dehumidifying and drying chamber (203), three UV-LED light-emitting tubes (211) are arranged on the inner wall of the dehumidifying and drying chamber (203) in an equally-divided manner and uniformly distributed on the inner wall of the dehumidifying and drying chamber;

a vacuum pump (3) and a dehumidifying and heating container (2) are also arranged in the machine shell (1), and a communicating pipe (4) of the vacuum pump (3) is communicated with an air pumping pipeline (209);

the top surface of the machine shell (1) is provided with a control device (6), the control device is arranged opposite to the dehumidifying and heating container (2), is arranged above the vacuum pump (3), and is electrically connected with the vacuum pump (3) and the electromagnetic valve (210).

2. The dehumidifying and drying nursing instrument according to claim 1, characterized in that: the dehumidifying and heating container (2) is arranged in a sandwich structure, wherein the inner layer is a metal layer, and the outer layer is an insulating layer; a plurality of circles of hollow metal pipes are coiled in the interlayer around the whole height of the metal inner container, and the upper port of the coil pipe is connected with the exhaust port of the vacuum pump; the lower port is directly communicated with the outside.

3. The dehumidifying and drying nursing instrument according to claim 1, characterized in that: the vacuum pump (3) is fixedly arranged on a metal bottom plate (7) of the machine shell (1) through a shock absorption pad (5).

4. The dehumidifying and drying nursing instrument according to claim 1, characterized in that: the control device (6) comprises a PCB control circuit and an LCD display touch controller, the PCB control circuit is connected with the LCD display touch controller, a main power supply unit (601), a first auxiliary power supply unit (602), a second auxiliary power supply unit (603), a vacuum pump loop unit (604), a pressure relief loop unit (606), a UV-LED drive loop unit (607), an MCU unit (608), a voltage reduction and noise reduction loop unit (609), an alarm loop unit (610), a constant temperature heating unit (611), a temperature and humidity acquisition unit (612) and a pressure acquisition unit (605) are arranged on the PCB control circuit, the input end of the main power supply unit (601) is connected with an external DC12V, the output end of the main power supply unit (601) is connected with the input end of the second auxiliary power supply unit (603), and the output end of the second auxiliary power supply unit (603) is connected with the input end of the LCD display touch controller, the output end of the main power supply unit (601) is also connected with the input end of a first auxiliary power supply unit (602), the output end of the first auxiliary power supply unit (603) is connected with the power supply ends of a main control MCU unit (608), a voltage reduction noise circuit unit (609), an alarm circuit unit (610), a constant temperature heating unit (611), a temperature and humidity acquisition unit (612) and a pressure acquisition unit (605), the output ends of the temperature and humidity acquisition unit (612) and the pressure acquisition unit (613) are connected with the input end of the MCU unit (608), the control end of the MCU unit (608) is connected with the controlled ends of the voltage reduction noise circuit unit (609), the alarm circuit unit (610) and the constant temperature heating unit (611), the output end of the MCU unit (608) is connected with the input end of an LCD display touch controller, and the output end of the main power supply unit (601) is connected with the voltage reduction circuit unit (604), the pressure reduction circuit unit (606) and the power supply end of the UV-LED drive circuit unit ( The control end of the MCU unit (608) is connected with the controlled ends of the vacuum pump loop unit (604), the pressure relief loop unit (606) and the UV-LED drive loop unit (607).

5. The dehumidifying and drying nursing instrument according to claim 4, wherein: the vacuum pump loop unit (604) comprises a first vacuum pump control loop, and the first vacuum pump control loop is composed of a current limiting resistor R1, a photoelectric coupler OC1, voltage dividing resistors R2, R3 and a MOS (metal oxide semiconductor) transistor VT1, wherein one end of a current limiting resistor R1 is connected with a voltage of 5V, and the other end of the current limiting resistor R1 is connected with a first pin of a photoelectric coupler OC 1; a second pin of the photoelectric coupler OC1 is connected with a twenty-sixth pin of the main control MCU unit, and a third pin of the photoelectric coupler OC1 is connected with the MOS transistor VT1 through voltage dividing resistors R2 and R3; a fourth pin of the photoelectric coupler OC1 is connected with a DC12V power supply, and the MOS tube VT1 is connected with the first vacuum pump;

6. The dehumidifying and drying nursing instrument according to claim 4, wherein: the UV-LED driving circuit unit (607) comprises a chip U1, a third pin of a chip U1 is arranged in a suspended mode, a first pin of the chip U1 is connected with an anode of a diode VD1, a cathode of the diode VD1 is connected with a resistor R8, a capacitor C2 and a resistor R9 are connected with a UV-LED lamp, a fifth pin of the chip U1 is connected with a cathode of a diode VD1, a fourth pin and a sixth pin of the chip U1 are connected with one end of an inductor L1, the other end of the inductor L1 is connected with an anode of a diode VD1, a second pin of the chip U1 is grounded, connected with a capacitor C1 and connected with a photoelectric coupler OC3 through a MOS tube VT3, wherein the model of the chip U1 is SY 7200.

7. The dehumidifying and drying nursing instrument according to claim 4, wherein: the constant temperature heating unit (611) comprises an MOS tube VT4, the drain electrode of the MOS tube VT4 is connected with the cold junction of the semiconductor refrigerator (202), the source electrode of the MOS tube VT4 is grounded, and the grid electrode of the MOS tube VT4 is connected with the MCU unit.

8. The dehumidifying and drying nursing instrument according to claim 4, wherein: the pressure acquisition unit (605) comprises a pressure sensor module, a first pin, a fourth pin and a sixth pin of the pressure sensor module are all arranged in a suspended mode, a third pin of the pressure sensor module, a resistor R10 and a resistor R11 which are connected in series, are connected to a grid electrode of an MOS tube VT5 and are connected with the MCU, a drain electrode of the MOS tube VT5 is connected to 5V, a source electrode of the MOS tube VT5 is connected with a second pin of the pressure sensor module and is also connected with a resistor R10, a fifth pin of the pressure sensor module is connected with the MCU through a resistor R12 and a capacitor C3 which are connected in parallel, and the model of the pressure sensor module is ZP 6847.

9. The dehumidifying and drying nursing instrument according to claim 4, wherein: the pressure relief loop unit (606) comprises a photoelectric coupler OC4, a fourth pin of the photoelectric coupler OC4 is connected with 12V, a third pin of the photoelectric coupler OC4 is connected with an MOS (metal oxide semiconductor) VT6 through a voltage dividing resistor R13 and a voltage dividing resistor R14, and the MOS VT6 is connected with 12V through a pressure relief valve.

10. The dehumidifying and drying nursing instrument according to claim 4, wherein: the MCU unit is a singlechip of STC15W1K08 PWM.