Pet box drying system

Abstract

The utility model relates to the technical field of pet box drying, in particular to a pet box drying system which comprises a main control module, a temperature detection module, a silicon controlled rectifier switch module, an AND gate module, a motor driving module, a negative ion generation module and an ozone sterilization module which are arranged on a pet drying box. Fault detection of the motor driving module and the fan is achieved through the AND gate module, and meanwhile the AND gate module drives the negative-ion generator. A silicon-controlled switch module is designed on the heater, so that when software loses temperature control due to a certain reason, namely when the temperature exceeds a set value, the heater is forcibly turned off; when the temperature is too high, the temperature detection module can control the silicon controlled switch module to be turned off, so that the heater is turned off, the problem of a complex pet drying box system is solved, the maximum utilization of resources is achieved, and the hardware cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of pet carrier drying technology, and in particular to a pet carrier drying system. Background Technology

[0002] A pet carrier drying system primarily controls a fan and a heater, using temperature data for closed-loop feedback control. The fan is typically powered by DC 24V, the heater is high-power (approximately 1000W) and directly powered by AC 220V, while the control system is DC low-voltage. Existing pet carrier drying systems typically involve designing a power module board with AC to DC 24V circuitry, motor control circuitry, and a SCR switch. A separate PCB board is then designed for control, connected via ribbon cables to provide power, control the motor, and manage the SCR switch. However, this design presents significant challenges for the power module board, as it's essentially a high-power switching power supply plus external circuitry, resulting in numerous components, manufacturing difficulties, high costs, and extensive wiring between the two boards. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a pet box drying system with a simple structure, which can reduce development difficulty and cost.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A pet carrier drying system includes a main control module, a temperature detection module, a SCR switch module, an AND gate module, a motor drive module, a negative ion generation module, and an ozone sterilization module, all mounted on the pet drying carrier. These modules are integrated onto the same circuit board. The main control module is electrically connected to each of the following modules: the temperature detection module, the SCR switch module, the AND gate module, the motor drive module, the negative ion generation module, and the ozone sterilization module. The AND gate module is electrically connected to both the motor drive module and the negative ion generation module. The temperature detection module is electrically connected to the SCR switch module. The SCR switch module is electrically connected to a heater, and the motor drive module is electrically connected to a fan.

[0006] Furthermore, the AND gate module includes an AND gate chip U2, a voltage comparator U6, a transistor Q8, and dual diodes D3. The AND gate chip U2 is model SN74LVC1G08.

[0007] The first pin of the AND gate chip U2 is electrically connected to the third pin of the voltage comparator U6. The second pin of the AND gate chip U2 is connected to the fifth pin of the voltage comparator U6. The second pin of the first pin of the AND gate chip U2 is electrically connected to the motor drive module. The third pin of the AND gate chip U2 is grounded. The fourth pin of the AND gate chip U2 is electrically connected to the collector of the transistor Q8. The fifth pin of the AND gate chip U2 is connected to a 3.3V power supply. The fourth pin of the AND gate chip U2 is electrically connected to both the main control module and the negative ion generating module. The emitter of the transistor Q8 is grounded. The base of the transistor Q8 is electrically connected to the two cathodes of the dual diode D3. One anode of the dual diode D3 is electrically connected to the sixth and seventh pins of the voltage comparator U6. The other anode of the dual diode D3 is electrically connected to the first pin of the voltage comparator U6.

[0008] Furthermore, the temperature detection module includes connector J2, voltage comparator U3 and connector J4. The voltage comparator U3 is an LM393. Both connector J2 and connector J4 are used to connect thermistors.

[0009] The first and seventh pins of the voltage comparator U3 are electrically connected to the thyristor switch module. The second pin of the voltage comparator U3 is electrically connected to the first pin of connector J2 and the main control module, respectively. The third pin of the voltage comparator U3 is electrically connected to the fifth pin of the voltage comparator U3. The fourth pin of the voltage comparator U3 is grounded. The sixth pin of the voltage comparator U3 is electrically connected to the first pin of connector J4. The eighth pin of the voltage comparator U3 is connected to a 3.3V power supply.

[0010] Furthermore, the negative ion generating module includes a resistor R20, a transistor Q4, a capacitor C8, and a connector J5, wherein the connector J5 is used to connect to the negative ion generator;

[0011] The base of transistor Q4 is electrically connected to one end of resistor R20, and the other end of resistor R20 is electrically connected to the main control module and the AND gate module respectively. The emitter of transistor Q4 is grounded, and the collector of transistor Q4 is electrically connected to the second pin of connector J5. The first pin of connector J5 is electrically connected to one end of capacitor C8, and both the first pin of connector J5 and one end of capacitor C8 are connected to a 12V power supply. The other end of capacitor C8 is grounded.

[0012] Furthermore, the ozone sterilization module includes a resistor R6, a MOSFET Q3, a diode D1, a capacitor C11, and a connector J3, wherein the connector J3 is used to connect to the ozone sterilizer.

[0013] The gate of the MOSFET Q3 is electrically connected to the main control module through resistor R6. The source of the MOSFET Q3 is grounded. The drain of the MOSFET Q3 is electrically connected to the anode of diode D1 and the second pin of connector J3. The cathode of diode D1 is electrically connected to the first pin of connector J3 and one end of capacitor C11. The cathode of diode D1, the first pin of connector J3, and one end of capacitor C11 are all connected to a 12V power supply. The other end of capacitor C11 is grounded.

[0014] Furthermore, the motor drive module includes connector J1, connector J9, resistor R42, resistor R38 and transistor Q6, wherein connector J1 and connector J9 are both used to connect to the fan.

[0015] The base of transistor Q6 is electrically connected to one end of resistor R38, and the other end of resistor R38 is connected to a 3.3V power supply. The emitter of transistor Q6 is electrically connected to the main control module. The collector of transistor Q6 is electrically connected to one end of resistor R42 and the third pin of connector J9 and the third pin of connector J1, respectively. The other end of resistor R42 is connected to a 5V power supply. The fourth pins of connector J1 and J9 are both electrically connected to AND gate modules. The second pins of connector J1 and J9 are both grounded. The first pins of connector J1 and J9 are both connected to a 24V power supply.

[0016] Furthermore, the thyristor switch module includes a capacitor C24, a bidirectional thyristor Q7, a resistor R19, a resistor R32, an optocoupler U4, a resistor R26, a transistor Q1, a transistor Q2, a bidirectional diode D4, a connector P6, and a connector P7, wherein both connector P6 and connector P7 are used to connect to the heater.

[0017] The first terminal of the optocoupler U4 is connected to a 5V power supply through resistor R26. The second terminal of the optocoupler U4 is electrically connected to the collector of transistor Q1. The third terminal of the optocoupler U4 is electrically connected to one end of resistor R19 and the third terminal of bidirectional thyristor Q7. The fourth terminal of the optocoupler U4 is electrically connected to the second terminal of bidirectional thyristor Q7, one end of capacitor C24, the first pin of connector P7, and the second pin of connector P7 through resistor R32. The other end of resistor R19 is electrically connected to the first terminal of bidirectional thyristor Q7, the other end of capacitor C24, the first pin of connector P6, and the second pin of connector P6. The emitter of transistor Q1 is grounded. The base of transistor Q1 is electrically connected to the collector of transistor Q2 and the main control module. The base of transistor Q2 is electrically connected to the third terminal of bidirectional diode D4. The first and second terminals of bidirectional diode D4 are both electrically connected to the temperature detection module. The emitter of transistor Q2 is grounded.

[0018] Furthermore, the main control module includes a chip U1, model number TGW206-16. The second pin of chip U1 is electrically connected to the ozone sterilization module, the third pin of chip U1 is electrically connected to the thyristor switch module, the fourth and sixth pins of chip U1 are both electrically connected to the temperature detection module, the fifth pin of chip U1 is electrically connected to the negative ion generation module and the AND gate module respectively, the seventh pin of chip U1 is electrically connected to the motor drive module, the eighth pin of chip U1 is connected to a 3.3V power supply, and the ninth pin of chip U1 is grounded.

[0019] Furthermore, the pet drying box also includes a door lock module, which is electrically connected to the main control module.

[0020] Furthermore, the door unlocking module includes resistor R35, resistor R8, MOSFET Q5, diode D13, and capacitor C5. The gate of MOSFET Q5 is electrically connected to one end of resistor R35 and one end of resistor R8, respectively. The other end of resistor R35 is electrically connected to the main control module, and the other end of resistor R8 is grounded. The source of MOSFET Q5 is grounded and electrically connected to the anode of diode D13. The cathode of diode D13 is electrically connected to one end of capacitor C5, and both the cathode of diode D13 and one end of capacitor C5 are connected to a 12V power supply. The other end of capacitor C5 is grounded.

[0021] The beneficial effects of this utility model are as follows:

[0022] This solution integrates a main control module, a temperature detection module, a SCR switch module, an AND gate module, a motor drive module, a negative ion generator module, and an ozone sterilization module. The AND gate module enables fan fault detection and simultaneously drives the negative ion generator. The heating element incorporates a SCR switch module; if the software loses control of the temperature for any reason (i.e., the temperature exceeds the set value), the heater will be forcibly shut down. When the temperature is too high, the temperature detection module can control the SCR switch module to shut down, thus shutting down the heater. This solution uses a main control module as the core of the control system, integrating it along with the temperature detection module, SCR switch module, AND gate module, motor drive module, negative ion generator module, and ozone sterilization module onto a single circuit board. This solves the problem of complex pet drying box systems, maximizing resource utilization and significantly reducing hardware costs. Attached Figure Description

[0023] Figure 1 This is a block diagram showing the module connection of the pet carrier drying system of this utility model;

[0024] Figure 2This is a circuit diagram of the AND gate module of the pet carrier drying system of this utility model;

[0025] Figure 3 This is a circuit diagram of the temperature detection module of the pet carrier drying system of this utility model;

[0026] Figure 4 This is a circuit diagram of the negative ion generating module of the pet carrier drying system of this utility model;

[0027] Figure 5 This is a circuit diagram of the ozone sterilization module of the pet carrier drying system of this utility model;

[0028] Figure 6 This is a circuit diagram of the motor drive module of the pet carrier drying system of this utility model;

[0029] Figure 7 This is a circuit diagram of the thyristor switch module of the pet carrier drying system of this utility model;

[0030] Figure 8 This is a circuit diagram of the main control module of the pet carrier drying system of this utility model;

[0031] Figure 9 This is a circuit diagram of the main control module of the pet carrier drying system of this utility model;

[0032] Figure 10 This is a circuit diagram of the door lock module of the pet carrier drying system of this utility model;

[0033] Figure 11 This is a circuit diagram of the touch button module of the pet carrier drying system of this utility model;

[0034] Figure 12 This is a circuit diagram of the switching power supply unit of the pet carrier drying system of this utility model;

[0035] Figure 13 This is a circuit diagram of the DC-DC step-down unit of the pet carrier drying system of this utility model;

[0036] Figure 14 This is a circuit diagram of the low-dropout linear voltage regulator unit of the pet carrier drying system of this utility model;

[0037] Label Explanation:

[0038] 1. Main control module; 2. Temperature detection module; 3. SCR switch module; 4. AND gate module; 5. Motor drive module; 6. Negative ion generator module; 7. Ozone sterilization module; 8. Door lock module; 9. Fan; 10. Heater. Detailed Implementation

[0039] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0040] Please refer to Figure 1 The technical solution adopted by this utility model is as follows:

[0041] A pet carrier drying system includes a main control module, a temperature detection module, a SCR switch module, an AND gate module, a motor drive module, a negative ion generation module, and an ozone sterilization module, all mounted on the pet drying carrier. These modules are integrated onto the same circuit board. The main control module is electrically connected to each of the following modules: the temperature detection module, the SCR switch module, the AND gate module, the motor drive module, the negative ion generation module, and the ozone sterilization module. The AND gate module is electrically connected to both the motor drive module and the negative ion generation module. The temperature detection module is electrically connected to the SCR switch module. The SCR switch module is electrically connected to a heater, and the motor drive module is electrically connected to a fan.

[0042] As can be seen from the above description, the beneficial effects of this utility model are as follows:

[0043] This solution integrates a main control module, a temperature detection module, a SCR switch module, an AND gate module, a motor drive module, a negative ion generator module, and an ozone sterilization module. The AND gate module enables fan fault detection and simultaneously drives the negative ion generator. The heating element incorporates a SCR switch module; if the software loses control of the temperature for any reason (i.e., the temperature exceeds the set value), the heater will be forcibly shut down. When the temperature is too high, the temperature detection module can control the SCR switch module to shut down, thus shutting down the heater. This solution uses a main control module as the core of the control system, integrating it along with the temperature detection module, SCR switch module, AND gate module, motor drive module, negative ion generator module, and ozone sterilization module onto a single circuit board. This solves the problem of complex pet drying box systems, maximizing resource utilization and significantly reducing hardware costs.

[0044] Furthermore, the AND gate module includes an AND gate chip U2, a voltage comparator U6, a transistor Q8, and dual diodes D3. The AND gate chip U2 is model SN74LVC1G08.

[0045] The first pin of the AND gate chip U2 is electrically connected to the third pin of the voltage comparator U6. The second pin of the AND gate chip U2 is connected to the fifth pin of the voltage comparator U6. The second pin of the first pin of the AND gate chip U2 is electrically connected to the motor drive module. The third pin of the AND gate chip U2 is grounded. The fourth pin of the AND gate chip U2 is electrically connected to the collector of the transistor Q8. The fifth pin of the AND gate chip U2 is connected to a 3.3V power supply. The fourth pin of the AND gate chip U2 is electrically connected to both the main control module and the negative ion generating module. The emitter of the transistor Q8 is grounded. The base of the transistor Q8 is electrically connected to the two cathodes of the dual diode D3. One anode of the dual diode D3 is electrically connected to the sixth and seventh pins of the voltage comparator U6. The other anode of the dual diode D3 is electrically connected to the first pin of the voltage comparator U6.

[0046] Furthermore, the temperature detection module includes connector J2, voltage comparator U3 and connector J4. The voltage comparator U3 is an LM393. Both connector J2 and connector J4 are used to connect thermistors.

[0047] The first and seventh pins of the voltage comparator U3 are electrically connected to the thyristor switch module. The second pin of the voltage comparator U3 is electrically connected to the first pin of connector J2 and the main control module, respectively. The third pin of the voltage comparator U3 is electrically connected to the fifth pin of the voltage comparator U3. The fourth pin of the voltage comparator U3 is grounded. The sixth pin of the voltage comparator U3 is electrically connected to the first pin of connector J4. The eighth pin of the voltage comparator U3 is connected to a 3.3V power supply.

[0048] Furthermore, the negative ion generating module includes a resistor R20, a transistor Q4, a capacitor C8, and a connector J5, wherein the connector J5 is used to connect to the negative ion generator;

[0049] The base of transistor Q4 is electrically connected to one end of resistor R20, and the other end of resistor R20 is electrically connected to the main control module and the AND gate module respectively. The emitter of transistor Q4 is grounded, and the collector of transistor Q4 is electrically connected to the second pin of connector J5. The first pin of connector J5 is electrically connected to one end of capacitor C8, and both the first pin of connector J5 and one end of capacitor C8 are connected to a 12V power supply. The other end of capacitor C8 is grounded.

[0050] Furthermore, the ozone sterilization module includes a resistor R6, a MOSFET Q3, a diode D1, a capacitor C11, and a connector J3, wherein the connector J3 is used to connect to the ozone sterilizer.

[0051] The gate of the MOSFET Q3 is electrically connected to the main control module through resistor R6. The source of the MOSFET Q3 is grounded. The drain of the MOSFET Q3 is electrically connected to the anode of diode D1 and the second pin of connector J3. The cathode of diode D1 is electrically connected to the first pin of connector J3 and one end of capacitor C11. The cathode of diode D1, the first pin of connector J3, and one end of capacitor C11 are all connected to a 12V power supply. The other end of capacitor C11 is grounded.

[0052] Furthermore, the motor drive module includes connector J1, connector J9, resistor R42, resistor R38 and transistor Q6, wherein connector J1 and connector J9 are both used to connect to the fan.

[0053] The base of transistor Q6 is electrically connected to one end of resistor R38, and the other end of resistor R38 is connected to a 3.3V power supply. The emitter of transistor Q6 is electrically connected to the main control module. The collector of transistor Q6 is electrically connected to one end of resistor R42 and the third pin of connector J9 and the third pin of connector J1, respectively. The other end of resistor R42 is connected to a 5V power supply. The fourth pins of connector J1 and J9 are both electrically connected to AND gate modules. The second pins of connector J1 and J9 are both grounded. The first pins of connector J1 and J9 are both connected to a 24V power supply.

[0054] Furthermore, the thyristor switch module includes a capacitor C24, a bidirectional thyristor Q7, a resistor R19, a resistor R32, an optocoupler U4, a resistor R26, a transistor Q1, a transistor Q2, a bidirectional diode D4, a connector P6, and a connector P7, wherein both connector P6 and connector P7 are used to connect to the heater.

[0055] The first terminal of the optocoupler U4 is connected to a 5V power supply through resistor R26. The second terminal of the optocoupler U4 is electrically connected to the collector of transistor Q1. The third terminal of the optocoupler U4 is electrically connected to one end of resistor R19 and the third terminal of bidirectional thyristor Q7. The fourth terminal of the optocoupler U4 is electrically connected to the second terminal of bidirectional thyristor Q7, one end of capacitor C24, the first pin of connector P7, and the second pin of connector P7 through resistor R32. The other end of resistor R19 is electrically connected to the first terminal of bidirectional thyristor Q7, the other end of capacitor C24, the first pin of connector P6, and the second pin of connector P6. The emitter of transistor Q1 is grounded. The base of transistor Q1 is electrically connected to the collector of transistor Q2 and the main control module. The base of transistor Q2 is electrically connected to the third terminal of bidirectional diode D4. The first and second terminals of bidirectional diode D4 are both electrically connected to the temperature detection module. The emitter of transistor Q2 is grounded.

[0056] Furthermore, the main control module includes a chip U1, model number TGW206-16. The second pin of chip U1 is electrically connected to the ozone sterilization module, the third pin of chip U1 is electrically connected to the thyristor switch module, the fourth and sixth pins of chip U1 are both electrically connected to the temperature detection module, the fifth pin of chip U1 is electrically connected to the negative ion generation module and the AND gate module respectively, the seventh pin of chip U1 is electrically connected to the motor drive module, the eighth pin of chip U1 is connected to a 3.3V power supply, and the ninth pin of chip U1 is grounded.

[0057] Furthermore, the pet drying box also includes a door lock module, which is electrically connected to the main control module.

[0058] Furthermore, the door unlocking module includes resistor R35, resistor R8, MOSFET Q5, diode D13, and capacitor C5. The gate of MOSFET Q5 is electrically connected to one end of resistor R35 and one end of resistor R8, respectively. The other end of resistor R35 is electrically connected to the main control module, and the other end of resistor R8 is grounded. The source of MOSFET Q5 is grounded and electrically connected to the anode of diode D13. The cathode of diode D13 is electrically connected to one end of capacitor C5, and both the cathode of diode D13 and one end of capacitor C5 are connected to a 12V power supply. The other end of capacitor C5 is grounded.

[0059] Please refer to Figures 1 to 14 As shown, Embodiment 1 of this utility model is as follows:

[0060] Please refer to Figure 1 A pet carrier drying system includes a main control module 1, a temperature detection module 2, a SCR switch module 3, an AND gate module 4, a motor drive module 5, a negative ion generator module 6, and an ozone sterilization module 7, all mounted on the pet drying carrier. These modules are integrated onto the same circuit board. The main control module 1 is electrically connected to the temperature detection module 2, SCR switch module 3, AND gate module 4, motor drive module 5, negative ion generator module 6, and ozone sterilization module 7. The AND gate module 4 is electrically connected to the motor drive module 5 and negative ion generator module 6. The temperature detection module 2 is electrically connected to the SCR switch module 3. The SCR switch module 3 is electrically connected to a heater 10. The motor drive module 5 is electrically connected to a fan 9.

[0061] Please refer to Figure 2, the AND gate module includes an AND gate chip U2, a voltage comparator U6, a triode Q8, and a double diode D3. The model of the AND gate chip U2 is SN74LVC1G08;

[0062] The first pin of the AND gate chip U2 is electrically connected to the third pin of the voltage comparator U6. The second pin of the AND gate chip U2 is connected to the fifth pin of the voltage comparator U6. The first and second pins of the AND gate chip U2 are both electrically connected to the motor drive module. The third pin of the AND gate chip U2 is grounded. The fourth pin of the AND gate chip U2 is electrically connected to the collector of the triode Q8. The fifth pin of the AND gate chip U2 is connected to the 3.3V power supply. The fourth pin of the AND gate chip U2 is respectively electrically connected to the main control module and the negative ion generation module. The emitter of the triode Q8 is grounded. The base of the triode Q8 is respectively electrically connected to the two cathode terminals of the double diode D3. One anode terminal of the double diode D3 is respectively electrically connected to the sixth and seventh pins of the voltage comparator U6. The other anode terminal of the double diode D3 is electrically connected to the first pin of the voltage comparator U6.

[0063] The AND gate module further includes a resistor R34, a resistor R25, a resistor R30, a resistor R31, a capacitor C17, a capacitor C26, a resistor R29, a resistor R36, a resistor R37, and a capacitor C27. For the specific connection relationship between its various components, please refer to Figure 2 .

[0064] The model of the AND gate chip U2 is SN74LVC1G08, which is a single-channel dual-input AND gate chip. The two-way FG_OUT becomes DC levels of 0V, 2.5V, and 5V after passing through the RC circuit. In the figure, R34 and C17, R25 and C26 are two groups of RC circuits, which shape the motor feedback signals FG_OUT1 and FG_OUT2 and convert the PWM wave into a DC level. The capacitor C27 is the power filter capacitor for the power supply pin of the AND gate. The pull-up resistors R30 and R31 enhance the shaped waveforms FG_A and FG_B (because the driving force of FG_OUT is very weak). These two waveforms are sent to the positive input terminal of the voltage comparator U6 and compared with 3.3V at the negative input terminal. When the motor is blocked, at least one of FG_A and FG_B becomes 5V. At this time, the voltage of the AIN+ pin of the voltage comparator U6 > the voltage of the AIN- pin, and the voltage comparator U6 outputs a high level, causing the triode Q8 to conduct and pulling down FG_OUT; under normal circumstances, the voltage of the AIN+ pin of the voltage comparator U6 < the voltage of the AIN- pin, and the voltage comparator U6 outputs a low level, and the triode Q8 does not conduct.

[0065] When a motor malfunctions, at least one PWM output will be absent, meaning either FG_A or FG_B will be at a low level. In this case, FG_OUT will also be at a low level. The main control module will detect FG_OUT and, if it is at a low level, will stop outputting FAN_PWM2, causing the motor to stop.

[0066] Please refer to Figure 3 The temperature detection module 2 includes connector J2, voltage comparator U3 and connector J4. The voltage comparator U3 is an LM393. Both connector J2 and connector J4 are used to connect thermistors.

[0067] The first and seventh pins of the voltage comparator U3 are electrically connected to the thyristor switch module 3. The second pin of the voltage comparator U3 is electrically connected to the first pin of connector J2 and the main control module 1, respectively. The third pin of the voltage comparator U3 is electrically connected to the fifth pin of the voltage comparator U3. The fourth pin of the voltage comparator U3 is grounded. The sixth pin of the voltage comparator U3 is electrically connected to the first pin of connector J4. The eighth pin of the voltage comparator U3 is connected to a 3.3V power supply.

[0068] Connectors J2 and J4 are connected to two external NTC thermistors. The voltage drop across these two thermistors is compared with the negative terminal (Ain-Bin-) of voltage comparator U3 to the positive terminal's set value (defined by resistors R17 and R21). The higher the temperature, the lower the resistance of the NTC thermistors, and the smaller the voltage drop. When the voltage drop is less than the positive input of voltage comparator U3, the output of comparator U3 goes high (Aout or Bout is high). This allows transistor Q2 to pull the base of transistor Q1 low (transistors Q2 and Q1 are in...). Figure 7 (In the middle), thus turning off the thyristor and stopping the heating.

[0069] The temperature detection module 2 also includes resistors R17 and R21, capacitors C18, R13, R12, and C14, resistors R7, R16, and C19, resistors R11, C13, and R10. For the specific connection relationships between these components, please refer to [reference needed]. Figure 3 Resistors R17, R21, and C18 are used to set a voltage value corresponding to the temperature value of an NTC thermistor; resistors R11 and R13 are connected in series between the port and the module chip, serving as current limiting protection; resistors R7 and R16 are pull-up resistors, because the voltage comparator U3 has an open collector output, so pull-up resistors are needed to output a high level; resistors R10 and R12, together with the NTC thermistor, form a voltage divider circuit, and capacitors C13 and C14 are voltage stabilizing capacitors.

[0070] Please refer to Figure 4The negative ion generating module 6 includes a resistor R20, a transistor Q4, a capacitor C8, and a connector J5, which is used to connect to the negative ion generator.

[0071] The base of transistor Q4 is electrically connected to one end of resistor R20, and the other end of resistor R20 is electrically connected to main control module 1 and AND gate module 4 respectively. The emitter of transistor Q4 is grounded, and the collector of transistor Q4 is electrically connected to the second pin of connector J5. The first pin of connector J5 is electrically connected to one end of capacitor C8, and both the first pin of connector J5 and one end of capacitor C8 are connected to a 12V power supply. The other end of capacitor C8 is grounded.

[0072] The negative ion generating module works as long as it is powered on, and does not work when the power is off. Since the working current is only a few mA, a transistor Q4 is used as an electronic switch. The transistor Q4 is controlled by the AND gate output signal FG_OUT, that is, the negative ion generator works when the fan is working, and does not work otherwise.

[0073] Please refer to Figure 5 The ozone sterilization module 7 includes a resistor R6, a MOSFET Q3, a diode D1, a capacitor C11, and a connector J3, which is used to connect to the ozone sterilizer.

[0074] The gate of the MOSFET Q3 is electrically connected to the main control module 1 through resistor R6. The source of the MOSFET Q3 is grounded. The drain of the MOSFET Q3 is electrically connected to the anode of diode D1 and the second pin of connector J3. The cathode of diode D1 is electrically connected to the first pin of connector J3 and one end of capacitor C11. The cathode of diode D1, the first pin of connector J3, and one end of capacitor C11 are all connected to a 12V power supply. The other end of capacitor C11 is grounded.

[0075] The ozone sterilization module also works when powered on and stops when powered off; it has a large operating current, so MOSFET Q3 is selected as the electronic switch; capacitor C11 is used for power storage and filtering, resistor R6 is a current limiting resistor, and resistor R2 is to prevent false triggering.

[0076] Please refer to Figure 6 The motor drive module 5 includes connector J1, connector J9, resistor R42, resistor R38 and transistor Q6. Both connector J1 and connector J9 are used to connect to fan 9.

[0077] The base of transistor Q6 is electrically connected to one end of resistor R38, and the other end of resistor R38 is connected to a 3.3V power supply. The emitter of transistor Q6 is electrically connected to main control module 1. The collector of transistor Q6 is electrically connected to one end of resistor R42 and the third pin of connector J9 and the third pin of connector J1, respectively. The other end of resistor R42 is connected to a 5V power supply. The fourth pins of connector J1 and J9 are both electrically connected to AND gate module 4. The second pins of connector J1 and J9 are both grounded. The first pins of connector J1 and J9 are both connected to a 24V power supply.

[0078] The motor drive signal requires a 5V PWM wave, while the control module only has a 3.3V level. Here, transistor Q6 is used for level conversion.

[0079] When FAN_PWM2 is low (0V), it can be seen that the base of transistor Q6 is higher than the emitter level, so transistor Q6 is turned on and the collector is pulled low.

[0080] When FAN_PWM2 is at a high level of 3.3V, it can be seen that the base and emitter levels of transistor Q6 are equal, so transistor Q6 is not conducting, and the collector is pulled up to 5V through resistor R42 (10K).

[0081] It can be seen that transistor Q6 realizes the conversion of PWM waveform from 3.3V to 5V.

[0082] Please refer to Figure 7 The thyristor switch module 3 includes a capacitor C24, a bidirectional thyristor Q7, a resistor R19, a resistor R32, an optocoupler U4, a resistor R26, a transistor Q1, a transistor Q2, a bidirectional diode D4, a connector P6, and a connector P7. Both connectors P6 and P7 are used to connect to the heater 10.

[0083] The first terminal of the optocoupler U4 is connected to a 5V power supply through resistor R26. The second terminal of the optocoupler U4 is electrically connected to the collector of transistor Q1. The third terminal of the optocoupler U4 is electrically connected to one end of resistor R19 and the third terminal of bidirectional thyristor Q7. The fourth terminal of the optocoupler U4 is electrically connected to the second terminal of bidirectional thyristor Q7, one end of capacitor C24, the first pin of connector P7, and the second pin of connector P7 through resistor R32. The other end of resistor R19 is electrically connected to the first terminal of bidirectional thyristor Q7, the other end of capacitor C24, the first pin of connector P6, and the second pin of connector P6. The emitter of transistor Q1 is grounded. The base of transistor Q1 is electrically connected to the collector of transistor Q2 and the main control module 1. The base of transistor Q2 is electrically connected to the third terminal of bidirectional diode D4. The first and second terminals of bidirectional diode D4 are both electrically connected to temperature detection module 2. The emitter of transistor Q2 is grounded.

[0084] Optocoupler U4 is a random-phase bidirectional thyristor driven optocoupler. When the internal infrared LED is turned on, it triggers the internal bidirectional thyristor to turn on, thereby controlling the external bidirectional thyristor Q7 to turn on. Therefore, it is only necessary to use transistor Q1 to control the internal infrared LED of optocoupler U4. Resistor R26 is used to set the operating current of the diode.

[0085] Transistor Q1 is used to control the conduction and cutoff of the diode inside optocoupler U4;

[0086] Transistor Q2 is an over-temperature forced shutdown switch under runaway conditions. Bidirectional diode D4 is a dual diode, equivalent to an OR gate. As long as either Aout or Bout is high, transistor Q2 can be turned on, pulling down the base of transistor Q1 to prevent it from conducting, thereby disconnecting the silicon-on-grid (SOG) circuit.

[0087] The thyristor switch module 3 also includes resistors R3, R9, R5, capacitor C25, and resistor R4. For the specific connection relationships between these components, please refer to [reference needed]. Figure 7 Resistor R3 is the current-limiting resistor for the base of transistor Q1, and resistor R4 is used to prevent false triggering; resistor R9 is the current-limiting resistor for the base of transistor Q2, and resistor R5 is used to prevent false triggering; capacitor C25 delays the turning on and off, making the edge smoother.

[0088] Please refer to Figure 8The main control module 1 includes a chip U1, model number TGW206-16. The second pin of the chip U1 is electrically connected to the ozone sterilization module 7, the third pin of the chip U1 is electrically connected to the thyristor switch module 3, the fourth and sixth pins of the chip U1 are both electrically connected to the temperature detection module 2, the fifth pin of the chip U1 is electrically connected to the negative ion generating module 6 and the AND gate module 4 respectively, the seventh pin of the chip U1 is electrically connected to the motor drive module 5, the eighth pin of the chip U1 is connected to a 3.3V power supply, and the ninth pin of the chip U1 is grounded.

[0089] The main control module 1 also includes capacitor C3, capacitor C4, resistor R14, resistor R15, resistor R1, and connector J11. For the specific connection relationships between these components, please refer to [reference needed]. Figure 8 and Figure 9 Capacitors C3 and C4 are used for filtering the power supply pins of the main control module. Resistors R14 and R15 are connected in series between the main control module and the touch chip (i.e., Figure 11 The communication pins of the chip plugged into connector J8 serve to limit current and delay edge signals, making the signal more stable; connector J11 is the program debugging interface and program recording interface of the main control module.

[0090] Please refer to Figure 1 The pet drying box also includes a door lock module 8, which is electrically connected to the main control module 1.

[0091] Please refer to Figure 10 The door lock module 8 includes a resistor R35, a resistor R8, a MOSFET Q5, a diode D13, and a capacitor C5. The gate of the MOSFET Q5 is electrically connected to one end of the resistor R35 and one end of the resistor R8. The other end of the resistor R35 is electrically connected to the main control module 1. The other end of the resistor R8 is grounded. The source of the MOSFET Q5 is grounded. The source of the MOSFET Q5 is electrically connected to the anode of the diode D13. The cathode of the diode D13 is electrically connected to one end of the capacitor C5, and both the cathode of the diode D13 and one end of the capacitor C5 are connected to a 12V power supply. The other end of the capacitor C5 is grounded.

[0092] The door lock module 8 works by opening the door with a high pulse of 12V width within 1 second, while closing the door requires manual operation. The instantaneous operating current is relatively large, so MOSFET Q5 is selected as the switch.

[0093] The door lock module 8 can only be opened electronically or manually from the outside; after the pet's fur is dried inside the box (drying program ends), the system will automatically open the door to let the pet out on its own without human intervention.

[0094] The pet drying box also includes a power module, which includes a switching power supply unit, a DC-DC step-down unit, and a low-dropout linear regulator unit. The switching power supply unit converts 220V to 24V, the DC-DC step-down unit steps down 24V to 12V and 5V, and the low-dropout linear regulator unit steps down 12V and 5V to 3.3V to power the main control module 1.

[0095] The switching power supply unit includes connector CN4, bidirectional diode D5, electrolytic capacitor CE2, capacitor C22, resistor R24, chip U5, capacitor C6, diode D9, inductor L6, capacitor C15, resistor R22, resistor R23, capacitor C10, capacitor C20, capacitor C21, and diode D6. For the specific connection relationships between these components, please refer to [reference needed]. Figure 12 The switching power supply unit is a DC-DC step-down circuit that reduces 24V to 12V. Chip U5 is a step-down chip, model SY8291, with a maximum input of 40V, an output current of 1.2A, and a switching frequency of 800kHz. Bidirectional diode D5 is a TVS bidirectional transient suppression diode, a protective device to prevent high-voltage pulses from damaging subsequent stages, with a clamping voltage of 26.7V. Electrolytic capacitors CE2 and C22 are input capacitors. Diode D9 is a freewheeling diode.

[0096] The basic principle of the DC-DC step-down circuit is PWM chopping. Energy is stored and filtered through an LC circuit (including inductor L6, capacitors C10 and C20) to make the output smooth. The FB pin of chip U5 is used to set the output voltage. Vout = 0.6(1+100 / 5.1) = 12.37V, where resistors R22 (100kΩ) and R23 (5.1kΩ) are used to set the output voltage value. Capacitor C15 is used to speed up the start-up output. Diode D6 is a Zener diode.

[0097] The DC-DC step-down unit includes capacitor C36, capacitor C41, resistor R33, chip U7, capacitor C37, inductor L1, capacitor C16, resistor R27, resistor R28, capacitor C39, capacitor C40, and diode D2. For the specific connection relationships between these components, please refer to [reference needed]. Figure 13 The DC-DC step-down unit is a DC-DC step-down circuit that reduces 12V to 5V. Chip U7 is a step-down chip, model SY8120, with a maximum input of 18V, a maximum output current of 2A, and a switching frequency of 500kHz. Capacitors C36 and C41 are input capacitors, and resistor R33 is an enable resistor.

[0098] The basic principle of the DC-DC step-down circuit is PWM chopping, which stores and filters energy through an LC circuit (including inductor L1 and capacitor C39) to make the output smooth. The FB pin of chip U7 is used to set the output voltage. Vout = 0.6(1+150 / 20) = 5.1V, where resistors R27 (150kΩ) and R28 (20kΩ) are used to set the output voltage value. Capacitor C16 is to speed up the start-up output, but it is optional.

[0099] The low-dropout linear regulator unit includes capacitor C9, chip U8, capacitor C1, and capacitor C2. For the specific connection relationships between these components, please refer to [reference needed]. Figure 14 .

[0100] The pet carrier drying system also includes a digital display module, a touch button module, and a buzzer, all of which are electrically connected to the main control module 1. For the specific circuit structure of the touch button module, please refer to [reference needed]. Figure 11 .

[0101] In summary, the pet drying box system provided by this utility model incorporates a main control module, a temperature detection module, a SCR switch module, an AND gate module, a motor drive module, a negative ion generator module, and an ozone sterilization module. The AND gate module enables fan fault detection and simultaneously drives the negative ion generator. The heating system utilizes a SCR switch module; if the software loses control of the temperature for any reason (i.e., the temperature exceeds the set value), the heater will be forcibly shut down. When the temperature is too high, the temperature detection module can control the SCR switch module to shut down, thereby shutting down the heater. This solution uses a main control module as the core of the control system, integrating it along with the temperature detection module, SCR switch module, AND gate module, motor drive module, negative ion generator module, and ozone sterilization module onto a single circuit board. This solves the problem of complex pet drying box systems, maximizes resource utilization, and significantly reduces hardware costs.

[0102] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pet carrier drying system, characterized in that, The device includes a main control module, a temperature detection module, a SCR switch module, an AND gate module, a motor drive module, a negative ion generator module, and an ozone sterilization module, all mounted on the same circuit board. The main control module is electrically connected to each of these modules. The AND gate module is electrically connected to both the motor drive module and the negative ion generator module. The temperature detection module is electrically connected to the SCR switch module. The SCR switch module is electrically connected to a heater, and the motor drive module is electrically connected to a fan.

2. The pet carrier drying system according to claim 1, characterized in that, The AND gate module includes an AND gate chip U2, a voltage comparator U6, a transistor Q8, and dual diodes D3. The model of the AND gate chip U2 is SN74LVC1G08. The first pin of the AND gate chip U2 is electrically connected to the third pin of the voltage comparator U6. The second pin of the AND gate chip U2 is connected to the fifth pin of the voltage comparator U6. The second pin of the first pin of the AND gate chip U2 is electrically connected to the motor drive module. The third pin of the AND gate chip U2 is grounded. The fourth pin of the AND gate chip U2 is electrically connected to the collector of the transistor Q8. The fifth pin of the AND gate chip U2 is connected to a 3.3V power supply. The fourth pin of the AND gate chip U2 is electrically connected to both the main control module and the negative ion generating module. The emitter of the transistor Q8 is grounded. The base of the transistor Q8 is electrically connected to the two cathodes of the dual diode D3. One anode of the dual diode D3 is electrically connected to the sixth and seventh pins of the voltage comparator U6. The other anode of the dual diode D3 is electrically connected to the first pin of the voltage comparator U6.

3. The pet carrier drying system according to claim 1, characterized in that, The temperature detection module includes connector J2, voltage comparator U3 and connector J4. The voltage comparator U3 is an LM393. Both connector J2 and connector J4 are used to connect thermistors. The first and seventh pins of the voltage comparator U3 are electrically connected to the thyristor switch module. The second pin of the voltage comparator U3 is electrically connected to the first pin of connector J2 and the main control module, respectively. The third pin of the voltage comparator U3 is electrically connected to the fifth pin of the voltage comparator U3. The fourth pin of the voltage comparator U3 is grounded. The sixth pin of the voltage comparator U3 is electrically connected to the first pin of connector J4. The eighth pin of the voltage comparator U3 is connected to a 3.3V power supply.

4. The pet carrier drying system according to claim 1, characterized in that, The negative ion generating module includes a resistor R20, a transistor Q4, a capacitor C8, and a connector J5, which is used to connect to the negative ion generator. The base of transistor Q4 is electrically connected to one end of resistor R20, and the other end of resistor R20 is electrically connected to the main control module and the AND gate module respectively. The emitter of transistor Q4 is grounded, and the collector of transistor Q4 is electrically connected to the second pin of connector J5. The first pin of connector J5 is electrically connected to one end of capacitor C8, and both the first pin of connector J5 and one end of capacitor C8 are connected to a 12V power supply. The other end of capacitor C8 is grounded.

5. The pet carrier drying system according to claim 1, characterized in that, The ozone sterilization module includes a resistor R6, a MOSFET Q3, a diode D1, a capacitor C11, and a connector J3, which is used to connect to the ozone sterilizer. The gate of the MOSFET Q3 is electrically connected to the main control module through resistor R6. The source of the MOSFET Q3 is grounded. The drain of the MOSFET Q3 is electrically connected to the anode of diode D1 and the second pin of connector J3. The cathode of diode D1 is electrically connected to the first pin of connector J3 and one end of capacitor C11. The cathode of diode D1, the first pin of connector J3, and one end of capacitor C11 are all connected to a 12V power supply. The other end of capacitor C11 is grounded.

6. The pet carrier drying system according to claim 1, characterized in that, The motor drive module includes connector J1, connector J9, resistor R42, resistor R38 and transistor Q6. Both connector J1 and connector J9 are used to connect to the fan. The base of transistor Q6 is electrically connected to one end of resistor R38, and the other end of resistor R38 is connected to a 3.3V power supply. The emitter of transistor Q6 is electrically connected to the main control module. The collector of transistor Q6 is electrically connected to one end of resistor R42 and the third pin of connector J9 and the third pin of connector J1, respectively. The other end of resistor R42 is connected to a 5V power supply. The fourth pins of connector J1 and J9 are both electrically connected to AND gate modules. The second pins of connector J1 and J9 are both grounded. The first pins of connector J1 and J9 are both connected to a 24V power supply.

7. The pet carrier drying system according to claim 1, characterized in that, The thyristor switch module includes a capacitor C24, a bidirectional thyristor Q7, a resistor R19, a resistor R32, an optocoupler U4, a resistor R26, a transistor Q1, a transistor Q2, a bidirectional diode D4, a connector P6, and a connector P7. Both connectors P6 and P7 are used to connect to the heater. The first terminal of the optocoupler U4 is connected to a 5V power supply through resistor R26. The second terminal of the optocoupler U4 is electrically connected to the collector of transistor Q1. The third terminal of the optocoupler U4 is electrically connected to one end of resistor R19 and the third terminal of bidirectional thyristor Q7. The fourth terminal of the optocoupler U4 is electrically connected to the second terminal of bidirectional thyristor Q7, one end of capacitor C24, the first pin of connector P7, and the second pin of connector P7 through resistor R32. The other end of resistor R19 is electrically connected to the first terminal of bidirectional thyristor Q7, the other end of capacitor C24, the first pin of connector P6, and the second pin of connector P6. The emitter of transistor Q1 is grounded. The base of transistor Q1 is electrically connected to the collector of transistor Q2 and the main control module. The base of transistor Q2 is electrically connected to the third terminal of bidirectional diode D4. The first and second terminals of bidirectional diode D4 are both electrically connected to the temperature detection module. The emitter of transistor Q2 is grounded.

8. The pet carrier drying system according to claim 1, characterized in that, The main control module includes a chip U1, model number TGW206-16. The second pin of chip U1 is electrically connected to the ozone sterilization module, the third pin of chip U1 is electrically connected to the thyristor switch module, the fourth and sixth pins of chip U1 are both electrically connected to the temperature detection module, the fifth pin of chip U1 is electrically connected to the negative ion generation module and the AND gate module respectively, the seventh pin of chip U1 is electrically connected to the motor drive module, the eighth pin of chip U1 is connected to a 3.3V power supply, and the ninth pin of chip U1 is grounded.

9. The pet carrier drying system according to claim 1, characterized in that, The pet drying box also includes a door lock module, which is electrically connected to the main control module.

10. The pet carrier drying system according to claim 9, characterized in that, The door unlocking module includes resistor R35, resistor R8, MOSFET Q5, diode D13, and capacitor C5. The gate of MOSFET Q5 is electrically connected to one end of resistor R35 and one end of resistor R8, respectively. The other end of resistor R35 is electrically connected to the main control module. The other end of resistor R8 is grounded. The source of MOSFET Q5 is grounded. The source of MOSFET Q5 is electrically connected to the anode of diode D13. The cathode of diode D13 is electrically connected to one end of capacitor C5, and both the cathode of diode D13 and one end of capacitor C5 are connected to a 12V power supply. The other end of capacitor C5 is grounded.

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