Liquid and steam safety control circuit of medical waste treatment high-temperature sterilization equipment

Abstract

The utility model discloses a liquid and steam safety control circuit of medical waste treatment high-temperature sterilization equipment, which comprises a pressure detection circuit for detecting the internal pressure of a sterilization tank and electrically connected with a microprocessor; the temperature detection circuit is used for detecting the internal temperature of the sterilization tank and is electrically connected with the microprocessor; and one end of the first load control circuit is electrically connected with the microprocessor, and the other end of the first load control circuit is electrically connected with a heater in the steam generator and the steam injection valve. According to the scheme, the internal pressure and the internal temperature of the sterilization tank are detected through the pressure detection circuit and the temperature detection circuit, when the internal pressure and the internal temperature of the sterilization tank are abnormal, the heater can be controlled to be powered off and stop working through the first load control circuit, and meanwhile the steam injection valve is controlled to be powered off. Steam is prevented from continuously entering the sterilization tank, and the safety of the medical waste treatment high-temperature sterilization equipment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical waste treatment high temperature sterilization equipment safety technical field, specifically related to a kind of liquid vapor safety control circuit of medical waste treatment high temperature sterilization equipment. BACKGROUND

[0002] When the medical waste is treated, the medical waste is often crushed, and the crushed medical waste is sterilized by high-temperature steam. In order to ensure the safety of the high-temperature sterilization equipment, the temperature and pressure in the sterilization tank of the high-temperature sterilization equipment need to be controlled when the medical waste is sterilized by high temperature. However, the pressure in the sterilization tank of the current high-temperature sterilization equipment is mainly controlled by the automatic pressure relief valve, which cannot cut off the steam supply to the sterilization tank in time, and there is a safety hazard. SUMMARY

[0003] The utility model provides a kind of liquid vapor safety control circuit of medical waste treatment high temperature sterilization equipment, the internal pressure and internal temperature of sterilization tank are detected by pressure detection circuit and temperature detection circuit, when the internal pressure and internal temperature of sterilization tank are abnormal, first load control circuit can be controlled heater power-off stop working, steam injection valve is controlled power-on closed simultaneously, avoid steam continue to enter sterilization tank, ensure the safety of medical waste treatment high temperature sterilization equipment.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0005] The utility model provides a kind of liquid vapor safety control circuit of medical waste treatment high temperature sterilization equipment, comprising:

[0006] The pressure detection circuit detects the internal pressure of the sterilization tank of the medical waste treatment high-temperature sterilization equipment, and the pressure detection circuit is electrically connected with the microprocessor.

[0007] The temperature detection circuit detects the internal temperature of the sterilization tank of the medical waste treatment high-temperature sterilization equipment, and the temperature detection circuit is electrically connected with the microprocessor.

[0008] The first load control circuit is electrically connected with the microprocessor at one end, and the heater in the steam generator of the medical waste treatment high-temperature sterilization equipment and the steam injection valve are electrically connected at the other end of the first load control circuit. The steam injection valve is connected between the sterilization tank and the steam generator. The steam injection valve is a normally open electromagnetic valve, and the heater is powered on normally, and the steam injection valve is powered off. When abnormal, the heater is powered off, and the steam injection valve is powered on.

[0009] Optionally, the pressure detection circuit comprises:

[0010] A pressure sensor, a GND pin of the pressure sensor is grounded, a VCC pin of the pressure sensor is electrically connected with a VCC pin of the microprocessor, a V_OUT pin of the pressure sensor is electrically connected with an ADC1 pin of the microprocessor through a second resistor.

[0011] Optionally, the pressure detection circuit further comprises:

[0012] A fourth capacitor, the fourth capacitor is electrically connected between a GND pin and a V_OUT pin of the pressure sensor;

[0013] A fifth capacitor, the fifth capacitor is electrically connected between a GND pin and a VCC pin of the pressure sensor;

[0014] A sixth capacitor, the sixth capacitor is electrically connected between a GND pin and a VCC pin of the pressure sensor.

[0015] Optionally, the temperature detection circuit comprises:

[0016] A temperature sensor, a GND pin of the temperature sensor is grounded, a VDD pin of the temperature sensor is electrically connected with a VCC pin of the microprocessor, a DQ pin of the temperature sensor is electrically connected with a PD3 pin of the microprocessor, and a third resistor is electrically connected between the DQ pin of the temperature sensor and the VCC pin of the microprocessor.

[0017] Optionally, the first load control circuit comprises:

[0018] A first MOS tube, a gate of the first MOS tube is electrically connected with a PD4 pin of the microprocessor through a fourth resistor, and a drain of the first MOS tube is grounded;

[0019] A fifth resistor, the gate of the first MOS tube is grounded through the fifth resistor;

[0020] A seventh capacitor, the seventh capacitor is electrically connected between the gate and the drain of the first MOS tube;

[0021] A first relay, a first pin of a coil of the first relay is electrically connected with a VCC pin of the microprocessor, a second pin of the coil of the first relay is electrically connected with a source of the first MOS tube, a common terminal pin of the first relay is electrically connected with a load power supply, a normally closed contact pin of the first relay is electrically connected with a heater in a steam generator of the medical waste treatment high-temperature sterilization equipment, and a normally open contact pin of the first relay is electrically connected with the steam injection valve;

[0022] A first diode, a positive electrode of the first diode is electrically connected with a source electrode of the first MOS tube, and a negative electrode of the first diode is electrically connected with a first pin of a coil of the first relay.

[0023] Optionally, the liquid-vapor safety control circuit of the medical waste treatment high-temperature sterilization equipment further comprises:

[0024] A second load control circuit, one end of the second load control circuit is electrically connected with the microprocessor, and the other end of the second load control circuit is electrically connected with an exhaust valve on a sterilization tank of the medical waste treatment high-temperature sterilization equipment, and the exhaust valve is a normally closed electromagnetic valve.

[0025] Optionally, the second load control circuit comprises:

[0026] A second MOS tube, a gate electrode of the second MOS tube is electrically connected with a PD5 pin of the microprocessor through a sixth resistor, and a drain electrode of the second MOS tube is grounded.

[0027] A seventh resistor, the gate electrode of the second MOS tube is grounded through the seventh resistor.

[0028] An eighth capacitor, the eighth capacitor is electrically connected between the gate electrode and the drain electrode of the second MOS tube.

[0029] A second relay, a first pin of a coil of the second relay is electrically connected with a VCC pin of the microprocessor, a second pin of the coil of the second relay is electrically connected with a source electrode of the second MOS tube, a common end pin of the second relay is electrically connected with a load power supply, and a normally open contact pin of the second relay is electrically connected with the exhaust valve.

[0030] A second diode, a positive electrode of the second diode is electrically connected with the source electrode of the second MOS tube, and a negative electrode of the second diode is electrically connected with the first pin of the coil of the second relay.

[0031] Optionally, the second load control circuit further comprises:

[0032] An alarm, the alarm is electrically connected with the normally open contact pin of the second relay.

[0033] Optionally, an air outlet end of the exhaust valve is connected with a condenser.

[0034] The above scheme of the utility model at least has the following beneficial effects:

[0035] The above scheme of the utility model discloses, through pressure detection circuit and temperature detection circuit detect the internal pressure and internal temperature of sterilization tank, when the internal pressure and internal temperature of sterilization tank are abnormal, can pass through first load control circuit control heater power off and stop working, control steam injection valve power on and close simultaneously, avoid the steam to continue to enter sterilization tank, guarantee the safety of medical waste treatment high temperature sterilization equipment. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is the module diagram of the liquid vapor safety control circuit of the medical waste treatment high temperature sterilization equipment provided by the embodiment of the utility model;

[0037] Figure 2 It is the circuit diagram of the liquid vapor safety control circuit of the medical waste treatment high temperature sterilization equipment provided by the embodiment of the utility model;

[0038] Figure 3 It is the structure schematic diagram of the medical waste treatment high temperature sterilization equipment provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0039] Exemplary embodiments of the present disclosure will be described below in greater detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0040] As Figures 1-3 The utility model discloses a kind of liquid vapor safety control circuits of medical waste treatment high temperature sterilization equipment, comprising:

[0041] pressure detection circuit 10 of detecting the internal pressure of the sterilization tank 50 of medical waste treatment high temperature sterilization equipment, pressure detection circuit 10 is electrically connected with microprocessor U1;

[0042] temperature detection circuit 20 of detecting the internal temperature of the sterilization tank 50 of medical waste treatment high temperature sterilization equipment, temperature detection circuit 20 is electrically connected with microprocessor U1;

[0043] first load control circuit 30, first load control circuit 30 one end is electrically connected with microprocessor U1, first load control circuit 30 other end is electrically connected with the heater 70 in the steam generator 60 of medical waste treatment high temperature sterilization equipment and steam injection valve 80, steam injection valve 80 is connected between sterilization tank 50 and steam generator 60;Steam injection valve 80 is normally open solenoid valve, normally, heater 70 is powered on, steam injection valve 80 is powered off;Abnormal, heater 70 is powered off, steam injection valve 80 is powered on.

[0044] In the embodiment, when the medical waste treatment high-temperature sterilization equipment is in normal operation, the heater 70 is powered on to heat the liquid of the steam generator 60. Since the steam injection valve 80 is a normally open electromagnetic valve, when in normal operation, the steam injection valve 80 is powered off and is in an open state. The generated steam enters the sterilization tank 50 through the steam injection valve 80, and the steam is used to sterilize the medical waste in the sterilization tank 50 at high temperature.

[0045] The internal pressure and the internal temperature of the sterilization tank 50 are detected by the pressure detection circuit 10 and the temperature detection circuit 20 respectively. When the internal pressure of the sterilization tank 50 reaches the limit pressure preset value or the internal temperature of the sterilization tank 50 reaches the limit temperature preset value, the microprocessor U1 controls the heater 70 to be powered off and the steam injection valve 80 to be powered on through the first load control circuit 30. Since the steam injection valve 80 is a normally open electromagnetic valve, the steam injection valve 80 is in a closed state after being powered on. The heater 70 stops working and no longer generates steam. At the same time, the steam injection valve 80 is closed, and the steam cannot enter the sterilization tank 50, thereby ensuring the safety of the sterilization tank 50 and further ensuring the safety of the medical waste treatment high-temperature sterilization equipment.

[0046] Through the above process, the generation of steam can be stopped in time and the steam continues to enter the inside of the sterilization tank 50 in the case that the sterilization tank 50 is overheated or overpressured, thereby fully ensuring the safety of the medical waste treatment high-temperature sterilization equipment.

[0047] As shown in Figure 2 In an optional embodiment of the utility model, the pressure detection circuit 10 comprises:

[0048] The GND pin of the pressure sensor U2 is grounded, the VCC pin of the pressure sensor U2 is electrically connected with the VCC pin of the microprocessor U1, and the V_OUT pin of the pressure sensor U2 is electrically connected with the ADC1 pin of the microprocessor U1 through the second resistor R2.

[0049] In the embodiment, the pressure sensor U2 is arranged on the cover of the sterilization tank 50 of the medical waste treatment high-temperature sterilization equipment. After the cover is closed, the internal pressure of the sterilization tank 50 can be measured by the pressure sensor U2. The signal measured by the pressure sensor U2 is transmitted to the microprocessor U1 through the electrical connection between the V_OUT pin of the pressure sensor U2 and the ADC1 pin of the microprocessor U1. When the internal pressure of the sterilization tank 50 reaches the limit pressure preset value, the microprocessor U1 controls the heater 70 to be powered off and the steam injection valve 80 to be powered on through the first load control circuit 30. The heater 70 stops working and no longer generates steam. At the same time, the steam injection valve 80 is closed, and the steam cannot enter the sterilization tank 50, thereby ensuring the safety of the sterilization tank 50.

[0050] As shown in Figure 2As shown, in an optional embodiment of the present invention, the pressure detection circuit 10 further includes:

[0051] The fourth capacitor C4 is electrically connected between the GND pin and the V_OUT pin of the pressure sensor U2.

[0052] The fifth capacitor C5 is electrically connected between the GND pin and the VCC pin of the pressure sensor U2.

[0053] The sixth capacitor C6 is electrically connected between the GND pin and the VCC pin of the pressure sensor U2.

[0054] In this embodiment, the fifth capacitor C5 is an electrolytic capacitor. The positive terminal of the fifth capacitor C5 is electrically connected to the VCC pin of the pressure sensor U2, and the negative terminal of the fifth capacitor C5 is electrically connected to the GND pin of the pressure sensor U2. The fifth capacitor C5 and the sixth capacitor C6 attenuate the high-frequency noise signal, allowing the low-frequency useful signal to pass smoothly, thereby achieving the purpose of filtering and ensuring the power supply safety of the microprocessor U1. The fourth capacitor C4 filters the output signal of the pressure sensor U2 to ensure the safety of the microprocessor U1.

[0055] like Figure 2 As shown, in an optional embodiment of the present invention, the temperature detection circuit 20 includes:

[0056] Temperature sensor U3 has its GND pin grounded, its VDD pin electrically connected to the VCC pin of microprocessor U1, its DQ pin electrically connected to the PD3 pin of microprocessor U1, and a third resistor R3 electrically connected between the DQ pin of temperature sensor U3 and the VCC pin of microprocessor U1.

[0057] In this embodiment, temperature sensor U3 is installed on the lid of sterilization tank 50 of the high-temperature sterilization equipment for medical waste treatment. After the lid is closed, temperature sensor U3 measures the internal temperature of sterilization tank 50. Temperature sensor U3 is electrically connected to microprocessor U1 via its DQ pin, so that the signal measured by temperature sensor U3 is transmitted to microprocessor U1. When the internal temperature of sterilization tank 50 reaches the preset limit temperature, microprocessor U1 controls heater 70 to be de-energized and steam injection valve 80 to be energized via first load control circuit 30. Heater 70 stops working and no longer generates steam. At the same time, steam injection valve 80 closes, preventing steam from entering sterilization tank 50, thereby ensuring the safety of sterilization tank 50.

[0058] A third resistor R3 is electrically connected between the DQ pin of the temperature sensor U3 and the VCC pin of the microprocessor U1 to ensure the reliability of communication between the temperature sensor U3 and the microprocessor U1.

[0059] As Figure 2 shown, in an optional embodiment of the utility model, the first load control circuit 30 includes:

[0060] The first MOS tube Q1, the grid of first MOS tube Q1 is connected with the PD4 pin of microprocessor U1 through the fourth resistance R4, the drain of first MOS tube Q1 is grounded;

[0061] The fifth resistance R5, the grid of first MOS tube Q1 is grounded through the fifth resistance R5;

[0062] The seventh capacitor C7, the seventh capacitor C7 is connected between the grid and the drain of first MOS tube Q1;

[0063] The first relay K2, the first pin of coil of first relay K2 is connected with the VCC pin of microprocessor U1, the second pin of coil of first relay K2 is connected with the source of first MOS tube Q1, the common end pin of first relay K2 is connected with the load power supply, the normally closed contact pin of first relay K2 is connected with the heater 70 in the steam generator 60 of medical waste treatment high temperature sterilization equipment, the normally open contact pin of first relay K2 is connected with the steam injection valve 80;

[0064] The first diode D1, the positive pole of first diode D1 is connected with the source of first MOS tube Q1, the negative pole of first diode D1 is connected with the first pin of coil of first relay K2.

[0065] In this embodiment, when the internal pressure of sterilization tank 50 does not reach the limit pressure preset value, and the internal temperature of sterilization tank 50 does not reach the limit temperature preset value, microprocessor U1 controls first MOS tube Q1 to be in the cut-off state, the coil of first relay K2 is not electrified, the common end pin and normally closed contact pin of first relay K2 are communicated, the heater 70 is powered by load power supply, so that the heater 70 works to generate steam, the steam injection valve 80 is powered off, since the steam injection valve 80 is a normally open electromagnetic valve, the steam injection valve 80 is in the open state when powered off, and the steam can enter the sterilization tank 50 through the steam injection valve 80 powered off to sterilize the medical waste at high temperature;

[0066] When the internal pressure of the sterilization tank 50 reaches the limit pressure preset value or the internal temperature of the sterilization tank 50 reaches the limit temperature preset value, the microprocessor U1 controls the first MOS tube Q1 to be in the conducting state, the coil of the first relay K2 is electrified, the common end of the first relay K2 is in communication with the normally open contact pin, the heater 70 is powered off and stops working, no steam is generated, the steam injection valve 80 is powered by the load power supply, the steam injection valve 80 is electrified and in the closed state, and the steam cannot enter the sterilization tank 50, so that the safety of the sterilization tank 50 is ensured.

[0067] The fourth resistor R4 is used for current limiting protection, and the fifth resistor R5 and the seventh capacitor C7 are used for filtering, so that the safety of the first MOS tube Q1 is ensured.

[0068] When the coil of the first relay K2 is powered off, a reverse electromotive force is generated, and the first diode D1 provides a discharge circuit for the reverse electromotive force, so that the reverse electromotive force does not damage the first MOS tube Q1.

[0069] As shown in Figure 1 and Figure 3 In an optional embodiment of the utility model, the liquid-steam safety control circuit of the medical waste treatment high-temperature sterilization equipment further comprises:

[0070] A second load control circuit 40, one end of the second load control circuit 40 is electrically connected with the microprocessor U1, and the other end of the second load control circuit 40 is electrically connected with an exhaust valve 90 on the sterilization tank 50 of the medical waste treatment high-temperature sterilization equipment, and the exhaust valve 90 is a normally closed electromagnetic valve.

[0071] In this embodiment, when the internal pressure and the internal temperature of the sterilization tank 50 are both in the working preset range, the exhaust valve 90 is powered off and in the closed state in the normal working state.

[0072] When the internal pressure of the sterilization tank 50 reaches the limit pressure preset value but the internal temperature is not in the working preset range, it indicates that the medical waste treatment high-temperature sterilization equipment has an abnormal situation such as a sealing ring leakage, the microprocessor U1 controls the exhaust valve 90 to be electrified through the second load control circuit 40, so that the exhaust valve 90 is opened, the sterilization tank 50 is exhausted, and the equipment maintenance of the staff is facilitated.

[0073] As shown in Figure 2 In an optional embodiment of the utility model, the second load control circuit 40 comprises:

[0074] A second MOS tube Q2, the gate of the second MOS tube Q2 is electrically connected with the PD5 pin of the microprocessor U1 through the sixth resistor R6, and the drain of the second MOS tube Q2 is grounded.

[0075] A seventh resistor R7, the gate of the second MOS tube Q2 is grounded through the seventh resistor R7.

[0076] The eighth capacitor C8 is electrically connected between the gate and the drain of the second MOS tube Q2.

[0077] The second relay K3 has its first pin of the coil electrically connected with the VCC pin of the microprocessor U1, its second pin of the coil electrically connected with the source of the second MOS tube Q2, its common terminal pin electrically connected with the load power supply, and its normally open contact pin electrically connected with the exhaust valve 90.

[0078] The second diode D2 has its anode electrically connected with the source of the second MOS tube Q2 and its cathode electrically connected with the first pin of the coil of the second relay K3.

[0079] In the embodiment, when the internal pressure and the internal temperature of the sterilization tank 50 are within the working preset range, the microprocessor U1 controls the second MOS tube Q2 to be in the off state, the coil of the second relay K3 is not electrified, the common terminal pin of the second relay K3 is in communication with the normally closed contact pin, and the exhaust valve 90 is in the off state.

[0080] When the internal pressure of the sterilization tank 50 reaches the limit pressure preset value but the internal temperature does not reach the working preset range, it indicates that the medical waste treatment high-temperature sterilization equipment has an abnormal situation such as a sealing ring leakage, the microprocessor U1 controls the second MOS tube Q2 to be in the on state, the coil of the second relay K3 is electrified, the common terminal pin of the second relay K3 is in communication with the normally open contact pin, and the exhaust valve 90 is in the on state, so that the sterilization tank 50 is discharged and depressurized through the exhaust valve 90, and the equipment is convenient for the staff to maintain;

[0081] The sixth resistor R6 is used for current limiting protection, and the seventh resistor R7 and the eighth capacitor C8 are used for filtering, so as to ensure the safety of the second MOS tube Q2.

[0082] When the coil of the second relay K3 is de-energized, a reverse electromotive force is generated, and the second diode D2 provides a discharge circuit for the reverse electromotive force, so as to prevent the reverse electromotive force from damaging the second MOS tube Q2.

[0083] In the optional embodiment of the utility model, the second load control circuit 40 further includes:

[0084] The alarm is electrically connected with the normally open contact pin of the second relay K3.

[0085] In the embodiment, the alarm is electrically connected with the normally open contact pin of the second relay K3, so that the alarm is powered on at the same time when the exhaust valve 90 is powered on, and the alarm is used to alarm and remind the staff that there is an abnormality and needs to be repaired.

[0086] In the optional embodiment of the utility model, the exhaust end of the exhaust valve 90 is connected with the condenser.

[0087] In the embodiment, the exhaust end of the exhaust valve 90 is connected with the condenser, so that the steam discharged by the exhaust valve 90 can be condensed by the condenser, liquid recycling is realized, and energy saving and emission reduction are achieved.

[0088] Liquid-vapor safety control process of medical waste treatment high-temperature sterilization equipment:

[0089] When working, the internal pressure of the sterilization tank 50 is detected by the pressure sensor U2, the internal temperature of the sterilization tank 50 is detected by the temperature sensor U3, when the internal pressure and the internal temperature of the sterilization tank 50 are within the working preset range, the microprocessor U1 controls the second MOS tube Q2 to be in the cutoff state, the coil of the second relay K3 is not electrified, the common end pin of the second relay K3 is in communication with the normally closed contact pin, the exhaust valve 90 is powered off and in the closed state; the microprocessor U1 controls the first MOS tube Q1 to be in the cutoff state, the coil of the first relay K2 is not electrified, the common end pin of the first relay K2 is in communication with the normally closed contact pin, the heater 70 is powered by the load power supply, so that the heater 70 works to generate steam, the steam injection valve 80 is powered off and in the open state, and the steam can enter the sterilization tank 50 through the steam injection valve 80, so that the medical waste is high-temperature sterilized;

[0090] When the internal pressure of the sterilization tank 50 reaches the limit pressure preset value or the internal temperature of the sterilization tank 50 reaches the limit temperature preset value, the microprocessor U1 controls the first MOS tube Q1 to be in the conduction state, the coil of the first relay K2 is electrified, so that the common end of the first relay K2 is in communication with the normally open contact pin, the heater 70 is powered off and stops working, no longer generating steam, the steam injection valve 80 is powered by the load power supply, the steam injection valve 80 is electrified and in the closed state, and the steam cannot enter the sterilization tank 50, so that the safety of the sterilization tank 50 is ensured;

[0091] When the internal pressure of the sterilization tank 50 reaches the limit pressure preset value but the internal temperature does not reach the working preset range, it indicates that the medical waste treatment high-temperature sterilization equipment has an abnormal situation such as a sealing ring leakage, the microprocessor U1 controls the first MOS tube Q1 to be in a conducting state, the coil of the first relay K2 is electrified, the common end of the first relay K2 is in communication with the normally open contact pin, the heater 70 is powered off and stops working, no steam is generated, the steam injection valve 80 is powered by the load power supply, the steam injection valve 80 is electrified and in a closed state, the steam cannot enter the sterilization tank 50, and the safety of the sterilization tank 50 is ensured; at the same time, the microprocessor U1 controls the second MOS tube Q2 to be in a conducting state, the coil of the second relay K3 is electrified, the common end pin of the second relay K3 is in communication with the normally open contact pin, the exhaust valve 90 is powered on and in an open state, the sterilization tank 50 is exhausted and depressurized through the exhaust valve 90, and the alarm is also powered on, the alarm is used for alarming, and the staff is reminded that there is an abnormality and needs to be repaired;

[0092] Through the above process, the generation of steam can be stopped in time and the steam continues to enter the inside of the sterilization tank 50 under the condition that the sterilization tank 50 is overheated or overpressured, and the safety of the medical waste treatment high-temperature sterilization equipment is fully ensured; at the same time, when the equipment has an abnormality, the alarm is used for alarming, the staff can be reminded in time to repair, and the safety of the equipment is ensured.

[0093] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary technical personnel in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements should also be regarded as the protection range of the utility model.

Claims

1. A liquid vapor safety control circuit for a high-temperature sterilization device for medical waste treatment, characterized in that: The application relates to a medical waste treatment high-temperature sterilization equipment, which comprises the following parts: a pressure detection circuit (10) for detecting the internal pressure of a sterilization tank (50) of the medical waste treatment high-temperature sterilization equipment, wherein the pressure detection circuit (10) is electrically connected with a microprocessor (U1); a temperature detection circuit (20) for detecting the internal temperature of the sterilization tank (50) of the medical waste treatment high-temperature sterilization equipment, wherein the temperature detection circuit (20) is electrically connected with the microprocessor (U1); a first load control circuit (30) having one end electrically connected with the microprocessor (U1) and the other end electrically connected with a heater (70) in a steam generator (60) of the medical waste treatment high-temperature sterilization equipment and a steam injection valve (80) connected between the sterilization tank (50) and the steam generator (60), wherein the steam injection valve (80) is a normally open electromagnetic valve, the heater (70) is powered in normal time, and the steam injection valve (80) is powered off in normal time; the heater (70) is powered off in abnormal time, and the steam injection valve (80) is powered on in abnormal time.

2. The liquid vapor safety control circuit for a medical waste treatment autoclave of claim 1, wherein, The pressure detection circuit (10) comprises: a pressure sensor (U2) having a GND pin grounded, a VCC pin electrically connected with a VCC pin of the microprocessor (U1), and a V_OUT pin electrically connected with an ADC1 pin of the microprocessor (U1) through a second resistor (R2).

3. The liquid vapor safety control circuit for a medical waste treatment autoclave of claim 2, wherein, The pressure detection circuit (10) further comprises: a fourth capacitor (C4) electrically connected between the GND pin and the V_OUT pin of the pressure sensor (U2); a fifth capacitor (C5) electrically connected between the GND pin and the VCC pin of the pressure sensor (U2); a sixth capacitor (C6) electrically connected between the GND pin and the VCC pin of the pressure sensor (U2).

4. The liquid vapor safety control circuit for medical waste disposal autoclaves according to claim 1, characterized in that, The temperature detection circuit (20) comprises: a temperature sensor (U3) having a GND pin grounded, a VDD pin electrically connected with a VCC pin of the microprocessor (U1), and a DQ pin electrically connected with a PD3 pin of the microprocessor (U1), and a third resistor (R3) electrically connected between the DQ pin and the VCC pin of the microprocessor (U1).

5. The liquid vapor safety control circuit of a medical waste treatment autoclave as claimed in claim 1, wherein, The first load control circuit (30) comprises: a first MOS tube (Q1) having a gate electrically connected with a PD4 pin of the microprocessor (U1) through a fourth resistor (R4) and a drain grounded; a fifth resistor (R5) grounding the gate of the first MOS tube (Q1); a seventh capacitor (C7) electrically connected between the gate and the drain of the first MOS tube (Q1). A first relay (K2), a first pin of a coil of the first relay (K2) is electrically connected with a VCC pin of the microprocessor (U1), a second pin of the coil of the first relay (K2) is electrically connected with a source of the first MOS tube (Q1), a common end pin of the first relay (K2) is electrically connected with a heater (70) in a steam generator (60) of the medical waste treatment high-temperature sterilization equipment, a normally open contact pin of the first relay (K2) is electrically connected with the steam injection valve (80); A first diode (D1), a positive electrode of the first diode (D1) is electrically connected with the source of the first MOS tube (Q1), a negative electrode of the first diode (D1) is electrically connected with the first pin of the coil of the first relay (K2).

6. The liquid vapor safety control circuit for medical waste disposal autoclaves according to claim 1, characterized in that, Further comprising: A second load control circuit (40), one end of the second load control circuit (40) is electrically connected with the microprocessor (U1), the other end of the second load control circuit (40) is electrically connected with an exhaust valve (90) on a sterilization tank (50) of the medical waste treatment high-temperature sterilization equipment, the exhaust valve (90) is a normally closed electromagnetic valve.

7. The liquid vapor safety control circuit for a medical waste treatment autoclave according to claim 6, wherein The second load control circuit (40) comprises: A second MOS tube (Q2), a gate of the second MOS tube (Q2) is electrically connected with a PD5 pin of the microprocessor (U1) through a sixth resistor (R6), a drain of the second MOS tube (Q2) is grounded; A seventh resistor (R7), the gate of the second MOS tube (Q2) is grounded through the seventh resistor (R7); An eighth capacitor (C8), the eighth capacitor (C8) is electrically connected between the gate and the drain of the second MOS tube (Q2); A second relay (K3), a first pin of a coil of the second relay (K3) is electrically connected with the VCC pin of the microprocessor (U1), a second pin of the coil of the second relay (K3) is electrically connected with the source of the second MOS tube (Q2), a common end pin of the second relay (K3) is electrically connected with a load power supply, a normally open contact pin of the second relay (K3) is electrically connected with the exhaust valve (90); A second diode (D2), a positive electrode of the second diode (D2) is electrically connected with the source of the second MOS tube (Q2), a negative electrode of the second diode (D2) is electrically connected with the first pin of the coil of the second relay (K3).

8. The liquid vapor safety control circuit of a medical waste treatment autoclave as claimed in claim 7, wherein, Further comprising: An alarm, the alarm is electrically connected with the normally open contact pin of the second relay (K3).

9. The liquid vapor safety control circuit of a medical waste treatment autoclave as claimed in claim 6 wherein, An air outlet end of the exhaust valve (90) is connected with a condenser.

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