Multi-stage cooperative control intelligent disinfection cabinet control method

Abstract

The invention discloses a multi-stage cooperative control intelligent disinfection cabinet control method which comprises the following steps: S1, ultraviolet sterilization, S2, high-temperature sterilization and S3, negative ion sterilization, and the step of high-temperature sterilization is divided into a continuous heating stage and an intermittent constant temperature stage. Three stages of ultraviolet sterilization, high-temperature sterilization and negative ion sterilization are seamlessly connected in sequence, so that the sterilization effect is improved, the sterilization rate is increased, intermittent constant-temperature heating is adopted in the high-temperature sterilization stage, the temperature in the disinfection cabinet is controlled, the continuous working time of an infrared heating tube is shortened, the service life is prolonged, and the energy consumption is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of disinfection cabinets, and in particular relates to a control method for an intelligent disinfection cabinet with multi-stage coordinated control. Background Art

[0002] With the improvement of people's living standards and the strengthening of health awareness, disinfection cabinets have become widely used in places such as homes, restaurants, hospitals, and schools. In homes, people use disinfection cabinets to disinfect tableware and other items to ensure food hygiene; in restaurants, large quantities of tableware need to be disinfected quickly and efficiently to meet customers' dining needs; in hospitals, the disinfection of medical equipment is even more crucial to the safety of patients; and in schools, students' tableware and teaching aids also require regular disinfection. The diversification of disinfection cabinet usage scenarios and the increasing frequency of use have led to an increasingly urgent need for effective monitoring of their operating status.

[0003] Traditional disinfection cabinets have a single sterilization method, high energy consumption, and cannot control the temperature inside the disinfection cabinet. They cannot balance the sterilization efficiency and energy consumption, so they are in urgent need of improvement. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art, and to provide a multi-stage collaborative control method for an intelligent disinfection cabinet. The method seamlessly connects the three stages of ultraviolet sterilization, high-temperature sterilization and negative ion sterilization in sequence to increase the sterilization of the interior of the disinfection cabinet, thereby increasing the sterilization effect and improving the sterilization rate. In the high-temperature sterilization stage, intermittent constant temperature heating is used to control the internal temperature of the disinfection cabinet, reduce the continuous working time of the infrared heating tube, increase the service life and reduce energy consumption.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The multi-stage coordinated control method for an intelligent disinfection cabinet comprises the following steps:

[0007] S1. Ultraviolet sterilization: The ultraviolet lamp works continuously to sterilize the surface of tableware;

[0008] S2, high temperature sterilization: sterilize the tableware by high temperature, including two stages;

[0009] Continuous heating stage: The infrared heating tube continues to heat, and the internal temperature of the disinfection cabinet is monitored in real time through the NTC temperature sensor. When the internal temperature of the disinfection cabinet reaches 70℃, the infrared heating tube is turned off;

[0010] Intermittent constant temperature stage: The infrared heating tube works in a cycle of stopping for 2 minutes and starting for 3 minutes. The temperature is controlled at 60℃~70℃ by the NTC temperature sensor to balance the sterilization efficiency and energy consumption;

[0011] S3. Negative ion sterilization: Start the negative ion generator to eliminate residual bacteria and odors.

[0012] The three stages of ultraviolet sterilization, high temperature sterilization and negative ion sterilization are seamlessly connected in sequence to sterilize the inside of the disinfection cabinet, increase the sterilization effect, and improve the sterilization rate. In the high temperature sterilization stage, intermittent constant temperature heating is used to control the internal temperature of the disinfection cabinet, reduce the continuous working time of the infrared heating tube, increase the service life and reduce energy consumption.

[0013] Furthermore, the disinfection cabinet includes an ultraviolet lamp, an infrared heating tube, a negative ion generator and a circulating fan. The ultraviolet lamp, the infrared heating tube, the negative ion generator and the circulating fan are controlled and outputted by a first relay, a second relay, a third relay and a fourth relay respectively. The disinfection cabinet is also provided with a door status sensor, which is used to confirm whether the cabinet door is opened or closed. After the disinfection cabinet is started, the disinfection work of steps S1 to S3 is performed, and the full working time is 120 minutes.

[0014] Furthermore, the detailed steps of step S1 are: start the disinfection cabinet, select the automatic mode of the disinfection cabinet for operation, at this time, confirm the closing of the cabinet door through the door status sensor, when the cabinet door closing signal is confirmed, delay 1 second, the door lock is closed corresponding to the first relay closing, the ultraviolet lamp continues to output, and sterilizes by ultraviolet rays, and the sterilization time is 0 to 60 minutes of the full working time.

[0015] Furthermore, in step S2, after the ultraviolet lamp sterilization is completed, the second relay is switched to work, and the infrared heating tube is turned on to continue high-temperature disinfection, and the continuous disinfection time is 60 to 110 minutes of the full working time.

[0016] Furthermore, the detailed steps of the continuous heating stage are as follows: the infrared heating tube continuously works for 60 to 80 minutes, and the NTC temperature sensor monitors that the internal temperature of the disinfection cabinet reaches 70°C. During the operation of the infrared heating tube, the fourth relay is ensured to be evenly opened, and the circulating fan is operated to circulate the air flow inside the disinfection cabinet to ensure uniform internal temperature. When the NTC temperature sensor detects that the internal temperature of the disinfection cabinet is ≥70°C and lasts for 3 seconds, the infrared heating tube stops working.

[0017] Furthermore, the detailed steps of the intermittent constant temperature stage are as follows: when the internal temperature of the disinfection cabinet reaches 70°C or the working time reaches 80 minutes, it enters the intermittent constant temperature stage. The duration of the intermittent constant temperature stage is from 80 to 110 minutes of the full working time. After entering the intermittent constant temperature stage, the infrared heating tube stops working for 2 minutes and then starts working for 3 minutes in a cycle, and the start and stop of the infrared heating tube are controlled by the temperature value corresponding to the NTC temperature sensor, so that the internal temperature of the disinfection cabinet is stabilized at 60°C to 70°C.

[0018] Further, during the intermittent constant temperature stage;

[0019] When the infrared heating tube is in the state of stopping for 2 minutes, if the NTC temperature sensor detects that the temperature is ≤60℃, the stop cycle will be ended in advance and the infrared heating tube will be turned on;

[0020] When the infrared heating tube is in the 2 minutes of stopping working, the NTC temperature sensor detects that the temperature is ≥70℃, then the infrared heating tube is kept in the off state until entering the 3-minute opening cycle.

[0021] Further, during the intermittent constant temperature stage;

[0022] When the infrared heating tube is turned on for 3 minutes, if the NTC temperature sensor detects that the temperature is ≤60℃, the infrared heating tube will remain on until the NTC temperature sensor detects that the temperature is ≥70℃ and then turn off the infrared heating tube;

[0023] When the infrared heating tube is turned on for 3 minutes, if the NTC temperature sensor detects that the temperature is ≥70℃, the on cycle will be ended early and the infrared heating tube will be turned off.

[0024] Furthermore, the detailed steps of step S3 are: after the high-temperature sterilization stage is completed, the third relay is started to make the negative ion generator work, and the inside of the disinfection cabinet is disinfected for 10 minutes. After the disinfection is completed, the door status sensor opens the cabinet door to complete the entire working cycle.

[0025] Furthermore, the NTC temperature sensor measures the resistance value and calculates the current temperature value. The resistance-temperature calculation formula is:

[0026]

[0027] Where R T is the resistance value at temperature T, where T is the Kelvin temperature;

[0028] R 25 It is the nominal resistance at 25℃;

[0029] B is the material constant;

[0030] T 25 is the Kelvin temperature corresponding to 25°C;

[0031] e is a natural constant.

[0032] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0033] 1. Through the seamless connection of three stages of ultraviolet sterilization, high temperature sterilization and negative ion sterilization, the interior of the disinfection cabinet is sterilized to increase the sterilization effect and improve the sterilization rate. In the high temperature sterilization stage, intermittent constant temperature heating is used to control the internal temperature of the disinfection cabinet, reduce the continuous working time of the infrared heating tube, increase the service life and reduce energy consumption.

[0034] 2. In the continuous temperature rising stage, the present invention controls the circulating fan through the fourth relay to operate, so that the air inside the disinfection cabinet circulates, ensuring uniform internal temperature, increasing the disinfection effect and reducing energy consumption.

[0035] 3. High-temperature sterilization adopts threshold hysteresis control. The infrared heating tube starts when the temperature is ≤60℃ and turns off when it is ≥70℃. It is combined with a cycle of stopping work for 2 minutes and starting work for 3 minutes to stabilize the internal temperature of the disinfection cabinet and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings:

[0037] Figure 1 This is a control flow chart of the multi-stage collaborative control method for an intelligent disinfection cabinet of the present invention;

[0038] Figure 2 The function T=f(R T ) curve change diagram. DETAILED DESCRIPTION

[0039] like Figures 1 to 2 As shown, the disinfection cabinet of the present invention includes an ultraviolet lamp, an infrared heating tube, a negative ion generator and a circulating fan. The ultraviolet lamp, the infrared heating tube, the negative ion generator and the circulating fan are controlled and outputted by a first relay, a second relay, a third relay and a fourth relay respectively. The disinfection cabinet is also provided with a door status sensor, which is used to confirm whether the cabinet door is opened or closed. After the disinfection cabinet is started, the automatic mode is selected to run, and then the disinfection work of steps S1 to S3 is performed. The working time of the entire automatic mode is 120 minutes.

[0040] The multi-stage coordinated control method for an intelligent disinfection cabinet comprises the following steps:

[0041] S1. Ultraviolet sterilization: The ultraviolet lamp works continuously to perform spectrum sterilization on the surface of tableware.

[0042] The specific working steps are: first start the disinfection cabinet and select the automatic mode of the disinfection cabinet to run. At this time, the door status sensor is used to confirm the closing of the cabinet door. When the signal of the cabinet door closing is confirmed, there is a delay of 1 second, and the door lock is closed corresponding to the closure of the first relay. The ultraviolet lamp continues to output and sterilizes by ultraviolet rays. The sterilization time is 0 to 60 minutes of the full working time.

[0043] S2, high temperature sterilization: starting from the 60th minute, between 60 and 110 minutes, a total of 50 minutes, the tableware is sterilized by high temperature. When the ultraviolet lamp sterilization is completed, the second relay is switched to work, and the infrared heating tube is turned on for continuous high temperature disinfection. Step S2 includes two stages, namely the continuous heating stage and the intermittent constant temperature stage.

[0044] Continuous heating stage: The continuous heating stage is from the 60th to the 80th minute of the total working time, a total of 20 minutes. During the continuous heating stage, the infrared heating tube continues to heat, and the internal temperature of the disinfection cabinet is monitored in real time by the NTC temperature sensor until the internal temperature of the disinfection cabinet reaches 70°C, then the infrared heating tube is turned off. In the process of the infrared heating tube working, the fourth relay is turned on evenly to control the circulation fan to work. The circulation fan circulates the air flow inside the disinfection cabinet to ensure uniform internal temperature. When the NTC temperature sensor detects that the internal temperature of the disinfection cabinet is ≥70°C and lasts for 3 seconds, the infrared heating tube stops working.

[0045] During the continuous heating stage, the fourth relay controls the circulation fan to operate, so that the air inside the disinfection cabinet circulates, ensuring uniform internal temperature, increasing the disinfection effect and reducing energy consumption.

[0046] Intermittent constant temperature stage: When the internal temperature of the disinfection cabinet reaches 70℃ or the working time reaches 80 minutes, it enters the intermittent constant temperature stage. The intermittent constant temperature stage is from 80 to 110 minutes of the total working time, a total of 30 minutes. In the intermittent constant temperature stage, the infrared heating tube works in a cycle of stopping for 2 minutes and starting for 3 minutes, and the start and stop of the infrared heating tube is controlled by the temperature value corresponding to the NTC temperature sensor, so that the internal temperature of the disinfection cabinet is stabilized at 60℃~70℃, balancing the sterilization efficiency and energy consumption.

[0047] The intermittent constant temperature stage adopts threshold hysteresis control. The infrared heating tube starts when the internal temperature of the disinfection cabinet is ≤60℃ and shuts down when the internal temperature of the disinfection cabinet is ≥70℃. It is combined with a cycle of stopping work for 2 minutes and starting work for 3 minutes to stabilize the internal temperature of the disinfection cabinet and reduce energy consumption.

[0048] During the intermittent constant temperature stage;

[0049] When the infrared heating tube is in the 2-minute stop period, if the NTC temperature sensor detects that the internal temperature of the disinfection cabinet is ≤60°C, the stop cycle of the infrared heating tube will be ended in advance and the infrared heating tube will be turned on for heating; when the infrared heating tube is in the 2-minute stop period, if the NTC temperature sensor detects that the internal temperature of the disinfection cabinet is ≥70°C, the infrared heating tube will be kept in the closed state until entering the 3-minute start cycle.

[0050] When the infrared heating tube is turned on for 3 minutes, if the NTC temperature sensor detects that the internal temperature of the disinfection cabinet is ≤60℃, the infrared heating tube will remain on until the NTC temperature sensor detects that the internal temperature of the disinfection cabinet is ≥70℃ and then the infrared heating tube will be turned off; when the infrared heating tube is turned on for 3 minutes, if the NTC temperature sensor detects that the internal temperature of the disinfection cabinet is ≥70℃, the on cycle of the infrared heating tube will be ended early and the infrared heating tube will be turned off.

[0051] S3, negative ion sterilization: After the high-temperature sterilization stage, it enters the negative ion sterilization stage. After the high-temperature sterilization stage, the third relay is started to make the negative ion generator work. The negative ion sterilization stage is the 110th to 120th minute of the total working time. The interior of the disinfection cabinet is disinfected for 10 minutes to eliminate residual bacteria and odors. After the disinfection is completed, the door status sensor opens the cabinet door to complete the entire working cycle.

[0052] The present invention sterilizes the inside of the disinfection cabinet through seamless connection of three stages: ultraviolet sterilization, high-temperature sterilization and negative ion sterilization, thereby increasing the sterilization effect and improving the sterilization rate. In the high-temperature sterilization stage, intermittent constant temperature heating is used to control the internal temperature of the disinfection cabinet, reduce the continuous working time of the infrared heating tube, increase the service life and reduce energy consumption.

[0053] The NTC temperature sensor in the present invention calculates the temperature value in real time based on the resistance value. According to the functional relationship between resistance R and temperature T, T=f(R T ) Determine the temperature inside the disinfection cabinet.

[0054] like Figure 2 As shown in the curve change diagram, in this embodiment, the NTC temperature sensor is selected at 25° C., the nominal resistance of the NTC thermistor is 50 kΩ, and the material constant B is 3950K.

[0055] The NTC temperature sensor measures the resistance value and calculates the current temperature value. The resistance-temperature calculation formula is:

[0056]

[0057] Where R T is the resistance value at temperature T, where T is the Kelvin temperature;

[0058] R 25 It is the nominal resistance at 25℃;

[0059] B is the material constant;

[0060] T 25 is the Kelvin temperature corresponding to 25°C;

[0061] e is a natural constant.

[0062] Specifically, this embodiment takes 60°C and 70°C as examples:

[0063] At 60°C, the resistance value detected by the NTC temperature sensor is:

[0064]

[0065] At 70°C, the resistance value detected by the NTC temperature sensor is:

[0066]

[0067] In summary, when the NTC temperature sensor detects a resistance value greater than 7.2kΩ, it means that the internal temperature of the disinfection cabinet is less than 60℃; when the resistance value is between 4.5kΩ and 7.2kΩ, it means that the internal temperature of the disinfection cabinet is between 60℃ and 70℃; when the resistance value is less than 4.5kΩ, it means that the internal temperature of the disinfection cabinet is greater than 70℃.

[0068] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all included in the scope of protection of the present invention.

Claims

1. A multi-stage collaborative control method for an intelligent disinfection cabinet, characterized by: The following steps are included S1. Ultraviolet sterilization: The ultraviolet lamp works continuously to sterilize the surface of tableware; S2, high temperature sterilization: sterilize the tableware by high temperature, including two stages; Continuous heating stage: The infrared heating tube continues to heat, and the internal temperature of the disinfection cabinet is monitored in real time through the NTC temperature sensor. When the internal temperature of the disinfection cabinet reaches 70℃, the infrared heating tube is turned off; Intermittent constant temperature stage: The infrared heating tube works in a cycle of stopping for 2 minutes and starting for 3 minutes. The temperature is controlled at 60℃~70℃ by the NTC temperature sensor to balance the sterilization efficiency and energy consumption; S3. Negative ion sterilization: Start the negative ion generator to eliminate residual bacteria and odors.

2. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 1 is characterized in that: The disinfection cabinet includes an ultraviolet lamp, an infrared heating tube, a negative ion generator and a circulating fan. The ultraviolet lamp, the infrared heating tube, the negative ion generator and the circulating fan are controlled and outputted by a first relay, a second relay, a third relay and a fourth relay respectively. The disinfection cabinet is also provided with a door status sensor, which is used to confirm the opening and closing of the cabinet door. After the disinfection cabinet is started, the disinfection work of steps S1 to S3 is performed, and the full working time is 120 minutes.

3. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 2 is characterized in that The detailed steps of step S1 are: start the disinfection cabinet and select the automatic mode of the disinfection cabinet for operation. At this time, the closing of the cabinet door is confirmed by the door status sensor. When the signal of the cabinet door closing is confirmed, it is delayed for 1 second, the door lock is closed corresponding to the closing of the first relay, and the ultraviolet lamp is continuously output to sterilize by ultraviolet rays. The sterilization time is 0 to 60 minutes of the full working time.

4. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 2, characterized in that: In step S2, when the ultraviolet lamp sterilization is completed, the second relay is switched to work, and the infrared heating tube is turned on to continue high-temperature disinfection. The continuous disinfection time is 60 to 110 minutes of the full working time.

5. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 4 is characterized in that The detailed steps of the continuous heating stage are as follows: the infrared heating tube continuously works for 60 to 80 minutes, and the NTC temperature sensor monitors that the internal temperature of the disinfection cabinet reaches 70°C. During the operation of the infrared heating tube, ensure that the fourth relay is evenly opened, so that the circulating fan works and the air flow inside the disinfection cabinet circulates to ensure uniform internal temperature. When the NTC temperature sensor detects that the internal temperature of the disinfection cabinet is ≥70°C and lasts for 3 seconds, the infrared heating tube stops working.

6. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 5 is characterized in that The detailed steps of the intermittent constant temperature stage are: when the internal temperature of the disinfection cabinet reaches 70℃ or the working time reaches 80 minutes, it enters the intermittent constant temperature stage. The duration of the intermittent constant temperature stage is from 80 to 110 minutes of the full working time. After entering the intermittent constant temperature stage, the infrared heating tube stops working for 2 minutes and then starts working for 3 minutes in a cycle, and the start and stop of the infrared heating tube are controlled by the temperature value corresponding to the NTC temperature sensor to stabilize the internal temperature of the disinfection cabinet at 60℃~70℃.

7. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 6, characterized in that: During the intermittent constant temperature stage; When the infrared heating tube stops working for 2 minutes, the NTC temperature sensor detects that the temperature is ≤60℃. The stop cycle ends early and the infrared heating tube is turned on; When the infrared heating tube is in the 2 minutes of stopping working, the NTC temperature sensor detects that the temperature is ≥70℃, then the infrared heating tube is kept in the off state until entering the 3-minute opening cycle.

8. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 1, characterized in that: During the intermittent constant temperature stage; When the infrared heating tube is turned on for 3 minutes, if the NTC temperature sensor detects that the temperature is ≤60℃, the infrared heating tube will remain on until the NTC temperature sensor detects that the temperature is ≥70℃ and then turn off the infrared heating tube; When the infrared heating tube is turned on for 3 minutes, if the NTC temperature sensor detects that the temperature is ≥70℃, the on cycle will be ended early and the infrared heating tube will be turned off.

9. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 2 is characterized in that The detailed steps of step S3 are: after the high-temperature sterilization stage is completed, the third relay is started to make the negative ion generator work, and the inside of the disinfection cabinet is disinfected for 10 minutes. After the disinfection is completed, the door status sensor opens the cabinet door to complete the entire working cycle.

10. The multi-stage coordinated control intelligent disinfection cabinet control method according to claim 1, characterized in that: The NTC temperature sensor measures the resistance value and calculates the current temperature value. The resistance value-temperature calculation formula is: Where R T is the resistance value at temperature T, where T is the Kelvin temperature; R 25 It is the nominal resistance at 25℃; B is the material constant; T 25 is the Kelvin temperature corresponding to 25°C; e is a natural constant.

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