Chamber, system and method for processing medical waste

Abstract

The present invention relates to a waste treatment chamber (100) configured to operate in any one of a loading mode, a treatment mode, and an unloading mode, further configured to provide an inside environment of the treatment chamber (100) in the treatment mode for particle disinfection of medical waste using ozone, the treatment chamber comprising an inlet (110) configured to receive particles of medical waste in the loading mode, and configured to provide a gas-tight seal between the inside environment and an outside environment of the treatment chamber (100) in the treatment mode and the unloading mode, an outlet (120) configured to remove particles of medical waste from the treatment chamber (100) in the unloading mode, and configured to provide a gas-tight seal between the inside environment and the outside environment of the treatment chamber (100) in the loading mode and the treatment mode, a particle transport arrangement (130) configured to agitate particles of medical waste in the loading mode and the treatment mode, and further configured to move particles of medical waste to the outlet (120) for removal in the unloading mode, one or more sensors (S1, S2) configured to measure a characteristic of the sealed environment inside the treatment chamber (100), the treatment chamber fluidically coupled to or comprising a generator (G) configured to generate ozone and to maintain a target concentration level of ozone of the inside environment of the treatment chamber (100).

Description

Technical Field

[0001] This invention relates to waste treatment, and in particular to the treatment of hazardous medical waste using ozone. Background Technology

[0002] In conventional systems, hazardous medical waste, such as infectious hospital waste, is typically transported from the hospital to an incinerator by specialized transport vehicles, or alternatively, directly dumped in a landfill. Various conventional on-site facilities also exist for the direct disposal of hazardous waste at the hospital site to avoid transporting infectious medical waste from the hospital.

[0003] Such on-site equipment typically operates by heating hazardous waste in an autoclave or by heating the waste using ultrasound. This processing is energy-intensive with high operating costs and can result in odors and CO2 emissions. As an alternative, ozone processing can be used. Ozone processing has lower operating costs, requires less energy, and does not produce as many odors and CO2 emissions. Over the past decade, a technology has been developed in which hazardous waste is repeatedly exposed in small batches to high concentrations of ozone for short periods (e.g., 15 minutes). After treatment, the material is transferred to containers for later transport. In some of these technologies, hazardous waste is also pre-processed for volume reduction, for example, by tearing the material into small pieces in a high-powered shredder.

[0004] Document US7550111B2 illustrates a conventional system for ozone processing.

[0005] However, this conventional solution can pose risks to workers handling medical waste because high levels of ozone are harmful to humans, for example, in the event of a leak or any accidental damage to the environment used to disinfect batches of medical waste. Another drawback is that only relatively small batches of waste can be processed at a time, and the process needs to be restarted several times to handle medical waste. Furthermore, if medical waste is only exposed to ozone for a short period, there is a risk that some of the waste may not have been adequately exposed to ozone and therefore remain infectious after ozone treatment.

[0006] Therefore, there is a need for improved rooms, systems, and methods for handling medical waste. In particular, solutions that allow medical waste (such as infectious materials) to be disposed of and disinfected on-site within each individual hospital without the need to transport infectious waste from the hospital. Summary of the Invention

[0007] The purpose of embodiments of the present invention is to provide a solution that mitigates or solves the disadvantages and problems described above.

[0008] The above and other objectives are achieved by the subject matter described herein. Other advantageous embodiments of the invention are further defined herein.

[0009] According to a first aspect of the invention, the object of the invention is achieved by a waste treatment chamber configured to operate in any of the following modes: a loading mode, a treatment mode, and an unloading mode, further configured to provide an environment for disinfecting medical waste particles using ozone in the treatment mode. The treatment chamber includes an inlet configured to receive medical waste particles in the loading mode and configured to provide an airtight seal between an inner environment and an outer environment of the treatment chamber in both the treatment and unloading modes; an outlet configured to remove medical waste particles from the treatment chamber in the unloading mode and configured to provide an airtight seal between the inner and outer environments of the treatment chamber in both the loading and treatment modes; a particle conveying arrangement configured to agitate medical waste particles in both the loading and treatment modes and further configured to move medical waste particles to the outlet for removal in the unloading mode; a generator configured to generate ozone and maintain a target concentration level of ozone in the inner environment of the treatment chamber; and one or more sensors configured to measure characteristics of the inner environment of the treatment chamber.

[0010] At least one advantage of the invention according to the first aspect is that a better workflow is achieved because waste can be continuously supplied to the treatment room. Another advantage is that the relatively low concentration of ozone used reduces the risk to personnel involved in medical waste management. Yet another advantage is the reduced requirements for power distribution, power capacity, and energy consumption. The treated material can be safely stored in the hospital for several days without refrigeration for further delivery at an appropriate time. There is also the option to check the sterilization level of the entire batch, which is not possible using current technological solutions.

[0011] According to a second aspect of the invention, the object of the invention is achieved by a waste treatment system configured to use ozone for particulate disinfection of medical waste, the system comprising a waste treatment chamber according to the first aspect, and a control unit configured to control the treatment chamber to operate in any of the following modes: a loading mode, a treatment mode, and an unloading mode, wherein the control unit operating in the treatment mode is configured to control a generator using an input received from at least one of one or more sensors, the input indicating a measured ozone concentration level inside the treatment chamber.

[0012] According to a third aspect of the invention, the object of the invention is achieved by a method executed by a control unit of a waste treatment chamber according to the first aspect, the waste treatment chamber being configured to operate in any of the following modes: a loading mode, a processing mode, and an unloading mode. The method includes operating in the loading mode by: opening an inlet to receive particles of medical waste; closing an outlet to provide an airtight seal between an inner and outer environment of the treatment chamber; and agitating the received medical waste particles in the loading mode. Operating in the processing mode by: closing an inlet to provide an airtight seal between an inner and outer environment of the treatment chamber; agitating the received medical waste particles in the processing mode; generating ozone and maintaining a target concentration level of ozone in the inner environment of the treatment chamber in the processing mode. Operating in the unloading mode by: opening an outlet to remove medical waste particles from the treatment chamber in the unloading mode.

[0013] The advantages of the second and third aspects are at least the same as those of the first aspect.

[0014] Other applications and advantages of embodiments of the present invention will become clear from the following detailed description. Attached Figure Description

[0015] Figure 1 Waste treatment chamber 100 according to one or more embodiments of the present disclosure is shown.

[0016] Figure 2 A waste treatment system according to one or more embodiments of the present disclosure is shown.

[0017] Figure 3 Methods according to one or more embodiments of this disclosure are illustrated.

[0018] Figure 4 A system with reduced height according to one or more embodiments of the present disclosure is shown.

[0019] Figure 5A -D indicates the movement between the positions of the second feeder piston.

[0020] Figure 6A -B shows different views of a conveyor arrangement structure according to one or more embodiments of the present disclosure.

[0021] Figure 7 A shredder assembly according to one or more embodiments of the present disclosure is shown.

[0022] Figure 8 A vacuuming component according to one or more embodiments of the present disclosure is shown.

[0023] Figure 9AA side view of an evacuation component according to one or more embodiments of the present disclosure is shown.

[0024] Figure 9B A front view of an evacuation component according to one or more embodiments of the present disclosure is shown.

[0025] Figure 10A A shredder assembly 1000 is shown prior to operation of a waste treatment system in loading mode, according to one or more embodiments of the present disclosure.

[0026] Figure 10B A shredder assembly 1000 is shown before or during operation of a waste treatment system in a loading mode, according to one or more embodiments of the present disclosure.

[0027] Figure 11 An example is shown of a shredder assembly 1000 receiving all medical waste before the waste treatment system operates in loading mode, according to one or more embodiments of the present disclosure.

[0028] The following detailed description of one or more embodiments will provide those skilled in the art with a more complete understanding of embodiments of the invention, as well as the additional advantages thereof. It should be recognized that similar reference numerals are used to identify similar elements shown in one or more figures. Detailed Implementation

[0029] In this specification and the corresponding claims, the word "or" shall be understood to encompass both "and" and "or" in a mathematical sense, and shall not be understood to mean XOR (mutually exclusive OR). The indefinite article "a" in this disclosure and the claims is not limited to "a" and may also be understood to mean "one or more," i.e., plural.

[0030] In this disclosure, the term "treatment chamber" refers to a container constructed to retain medical waste in the environment. A treatment chamber can be implemented in any suitable manner, such as as a cylindrical tank or as a room / space. The treatment chamber can be made of suitable ozone-resistant / compatible materials, such as concrete, stainless steel, butyl rubber, Chemraz, cross-linked polyethylene (PEX), ethylene-propylene, fluorosilicone rubber, glass, or polycarbonate.

[0031] In this disclosure, the term "loading mode" refers to a processing chamber that is configured to receive particles of medical waste via an inlet.

[0032] In this disclosure, the term "treatment mode" refers to the construction of a treatment chamber in which particles of medical waste are continuously agitated or tumbled and exposed to ozone at a target ozone concentration level.

[0033] In this disclosure, the term "unloading mode" refers to a configuration of a processing chamber in which particles of processed medical waste move to an outlet and are removed from the processing chamber via the outlet.

[0034] In this disclosure, the terms "ozone generator" or "generator configured to generate ozone" refer to a device or arrangement capable of converting oxygen into ozone. Examples of ozone generators are ultraviolet (UV) light sources, such as 185 nm UV lamps, such as germicidal lamps available from LightTech LightSources at https: / / www.lightsources.com / blog / 185nm-uv-lamp-for-ozone-disinfection / . More examples of generators can be found at https: / / www.ozonetech.com / products / ozone-generators / ict-series. Another example is an ozone generator operating based on the principle of corona discharge.

[0035] Brief Overview of this Disclosure

[0036] As mentioned in the background paragraph, handling hazardous or infectious waste is troublesome, expensive, and can be dangerous for workers handling medical waste.

[0037] Some conventional systems apply high concentrations of ozone to relatively small batches of medical waste. Ozone is consumed during waste treatment, and the ozone concentration decreases over time, with the risk that not all particles will be fully exposed due to particle compression and agglomeration. Another drawback of such solutions is that this high concentration of ozone is harmful to human health, for example, in the event of a leak or any accidental damage to the environment used to disinfect batches of medical waste. Another disadvantage is that only relatively small batches of waste can be processed at a time, and the process needs to be restarted several times to treat medical waste. That is, the process requires user supervision and cannot be allowed to run autonomously overnight.

[0038] This disclosure improves the treatment of medical waste by providing a treatment chamber configured to operate in any of the three modes: loading, processing, and unloading. A constant and relatively low concentration level of ozone is maintained within the environment encompassed by the treatment chamber to sterilize the particles of medical waste using ozone. Furthermore, the particles of medical waste are agitated or tumbled to ensure that all particles are exposed to ozone. Therefore, the risk that not all particles will be fully exposed to ozone, due to particle compression and agglomeration / agglomeration, is eliminated.

[0039] Medical waste generated throughout the day, exhibiting significant variations in moisture, bacterial content, viral content, other pathogens, and material composition, can be emptied at irregular rates and pulverized into particles. Relatively large batches can be added to the treatment chamber over time and exposed to relatively low concentrations of ozone for relatively long periods, such as one hour or several hours (if desired), compared to existing equipment. During this process, all particles are separated by mechanical agitation, ensuring all particles are exposed to the target ozone concentration level. This is achieved by providing an ozone generator that replaces the ozone consumed by the process. Furthermore, the particle conveying arrangement serves a dual purpose: for agitating the medical waste particles in treatment mode and for conveying the medical waste particles in unloading mode.

[0040] There is a relationship between ozone concentration and exposure time to achieve desired disinfection levels. This disclosure sets ozone concentration levels and determines the required exposure time, or vice versa, sets a time (e.g., 1-10 hours) and determines the ozone concentration level required to disinfect all particles.

[0041] In addition, the treatment chamber may include a controllable gas inlet configured to supply fresh air and / or oxygen, which can be used to generate ozone, to the treatment chamber, and / or to supply ozone generated by a generator disposed outside the treatment chamber. The controllable gas inlet may include separate inlets for air and / or separate inlets for oxygen and / or separate inlets for ozone. Alternatively or additionally, the controllable gas inlet may include a combined gas inlet configured to supply any combination of air and / or oxygen and / or ozone.

[0042] In addition, the treatment chamber may include a controllable gas outlet configured to discharge gas from the environment within the treatment chamber, for example, by creating a negative pressure compared to the air pressure outside the treatment chamber, thereby reducing the risk of ozone leakage from the treatment chamber.

[0043] Details of this disclosure

[0044] Further details of this disclosure are provided in the accompanying drawings and the following paragraphs.

[0045] Figure 1 Waste treatment chamber 100 according to one or more embodiments of the present disclosure is shown. Waste treatment chamber 100 is configured to operate in any of the following modes: loading mode, processing mode, and unloading mode.

[0046] The treatment chamber 100 includes an inlet 110, an outlet 120, and a particle conveying arrangement 130. The inlet 110 is configured to move between an open position where particles of medical waste can flow into the treatment chamber 100 and a closed position where a gas-impermeable or airtight seal is formed between the interior and exterior of the treatment chamber 100. The outlet 120 is configured to move between an open position where particles of medical waste can flow out of the treatment chamber 100 and a closed position where a gas-impermeable or airtight seal is formed between the interior and exterior environments of the treatment chamber (100) (i.e., the interior and exterior of the treatment chamber 100).

[0047] In loading mode, the processing chamber is configured to receive particles of medical waste via inlet 110. In other words, in loading mode, the processing chamber is configured with inlet 110 in the open position, allowing particles of medical waste to flow into the processing chamber 100.

[0048] In the treatment mode, the treatment chamber is configured such that the particles of medical waste are continuously agitated or tumbled by the particle conveying arrangement 130 and exposed to ozone at a target ozone concentration level. In other words, in the treatment mode, the treatment chamber is configured with an inlet 110 in a closed position, effectively forming a gas-impermeable or airtight seal. The treatment chamber is further configured with an initiation / rotation conveying arrangement 130, which is configured to agitate the particles of medical waste inside the treatment chamber 100.

[0049] In unloading mode, the processing chamber is configured such that particles of processed medical waste are moved from the particle conveying arrangement 130 to the outlet 120 and removed from the processing chamber via the outlet. In other words, in unloading mode, the processing chamber is configured with an inlet 110 in a closed position, allowing particles of medical waste to flow out of the processing chamber 100. The processing chamber is further configured with an actuation / rotation conveying arrangement 130, which is configured to move particles of medical waste to the outlet 120 for removal from the processing chamber 100.

[0050] The treatment chamber 100 typically includes a container or vessel 101 configured to hold medical waste in the environment during treatment mode for particulate disinfection of the medical waste using ozone.

[0051] In one embodiment, the container or container 101 is configured to hold medical waste in a sealed or hermetically sealed environment.

[0052] The processing chamber 100 may have an elongated shape having a longitudinal axis. The processing chamber can be implemented in any suitable manner, for example, as a cylindrical tank or as a rectangular room / space, and may be made of, for example, metal or concrete. Any other suitable material may be used.

[0053] The treatment chamber 100 includes an inlet 110 configured to receive particles of medical waste in a loading mode and configured to provide an airtight seal between the inner and outer environments of the treatment chamber (100) in a treatment mode.

[0054] Entrance 110 can be placed at any suitable location on the processing chamber 100, for example, Figure 1 On the top half of the processing chamber 100 shown, or as Figure 4 The lower half of the processing chamber 100 shown.

[0055] The advantage of placing the inlet 110 on the top half of the treatment chamber 100 is that gravity will supply the particles of treated medical waste to the inlet 110 of the waste treatment chamber 100, and no separate feeder unit is required to supply the particles of treated medical waste to the inlet 110 of the waste treatment chamber 100.

[0056] The advantage of placing the entrance 110 on the lower half of the processing chamber 100 is that it reduces the overall height of the waste treatment system, including the waste processing chamber.

[0057] The processing chamber 100 further includes an outlet 120 configured to remove particles of medical waste from the processing chamber 100 in an unloading mode, and configured to provide an airtight seal between the inner and outer environments of the processing chamber 100 in both a loading and processing mode.

[0058] The processing chamber 100 further includes a particle conveying arrangement 130 configured to agitate particles of medical waste in loading and processing modes, and further configured to move particles of medical waste to an outlet 120 for removal in unloading mode.

[0059] In one embodiment, the conveying arrangement 130 is provided with a shaft 610 and a blade 620, the shaft having a longitudinal axis parallel to the longitudinal axis of the elongated processing chamber 100, and the blade extending in a direction orthogonal to the longitudinal axis of the shaft. Figure 6A As shown in -B, the impeller 620 can be mounted on the impeller shaft 630 and can be mounted at a fixed angle or controlled to any target angle. In one example, the impeller has a flat dovetail shape and can be oriented in processing mode at a 90-degree angle between the normal to its flat surface and the longitudinal axis of the elongated processing chamber 100. In another example, the impeller has a flat dovetail shape and can be oriented in unloading mode at a 45-degree angle (in the direction toward the outlet) between the normal to its flat surface and the longitudinal axis of the elongated processing chamber 100. In this way, the particles of medical waste are agitated in unloading mode and move toward the outlet in unloading mode.

[0060] The treatment chamber 100 further includes, or is fluidly connected to, a generator G configured to generate ozone and maintain a target ozone concentration level in the internal environment of the treatment chamber 100. The generator G may be arranged inside the treatment chamber 100, or arranged outside the treatment chamber 100 and fluidly connected to the inside of the treatment chamber 100, thus enabling the generated ozone to be transferred to the internal environment of the treatment chamber 100.

[0061] In one embodiment, the generator G is releasably attached to the processing chamber (100).

[0062] In one embodiment, the processing chamber 100 further includes one or more sensors S1, S2 configured to measure characteristics of the interior environment of the processing chamber 100. In one embodiment, the one or more sensors S1, S2 include at least one ozone sensor configured to measure the ozone concentration level of the interior environment of the processing chamber 100. Any suitable number of sensors can be used.

[0063] In one embodiment, one or more sensors S1, S2 include at least one temperature sensor configured to measure the temperature of the environment inside the processing chamber 100. In this embodiment, the processing chamber may further include a controllable climate control unit (not shown) configured to maintain a target temperature of the environment inside the processing chamber 100. An example range for the target temperature is 10-30 degrees Celsius.

[0064] In one embodiment, one or more sensors S1, S2 include at least one humidity sensor configured to measure the humidity of the environment inside the processing chamber 100. In this embodiment, the processing chamber 100 may further include a controllable humidifier configured to maintain a target humidity of the environment inside the processing chamber 100. An example range for the target humidity is 30-100% humidity.

[0065] In one embodiment, the processing chamber 100 further includes one or more inspection windows. In some embodiments, the one or more inspection windows may be arranged on the upper half of the processing chamber 100. The upper / top half of the chamber 100 may be defined by a horizontal plane that includes the longitudinal axis of the processing chamber 100 and is orthogonal to the direction of gravity. This plane divides the processing chamber 100 into an upper half that is furthest from the Earth's center of gravity and a lower half that is relatively closer to the Earth's center of gravity.

[0066] In one embodiment, the processing chamber 100 further includes a controllable gas inlet configured to provide fresh air and / or oxygen and / or ozone to the processing chamber 100. The controllable gas inlet may include separate inlets for air and / or separate inlets for oxygen and / or separate inlets for ozone. Alternatively or additionally, the controllable gas inlet may include a combined gas inlet configured to provide any combination of air and / or oxygen and / or ozone. Alternatively or additionally, the processing chamber 100 further includes a controllable gas outlet configured to exhaust gas from the environment within the processing chamber 100 and / or create a negative pressure relative to the atmosphere outside the processing chamber 100.

[0067] Figure 2 A waste treatment system according to one or more embodiments of the present disclosure is shown. The waste treatment system is configured to use ozone to sterilize particulate medical waste. (See also: Regarding...) Figure 1 The system described includes a waste treatment chamber 100. Optionally, the system includes a shredder assembly 400 configured to receive medical waste and process it into particles, and to supply the particles to an inlet 110 of the waste treatment chamber 100. The system further includes a control unit CU configured to control the treatment chamber 100 to operate in any of the following modes: a loading mode, a processing mode, and an unloading mode. In the processing mode, the control unit CU is configured to control a generator G using an input received from at least one of one or more sensors S2, S2. This input may, for example, indicate a measured ozone concentration level within the environment of the treatment chamber 100, and / or a measured temperature within the environment of the treatment chamber, and / or a measured humidity within the environment of the treatment chamber.

[0068] In one embodiment, the system further includes shredders 420, 720, and 1020 that generate medical waste particles by receiving and processing it, and supplying the medical waste particles to the inlet 110 of the waste treatment chamber 100.

[0069] In one embodiment, one or more sensors S2, S2 of the processing chamber 100 include at least one temperature sensor (not shown), and the system further includes a controllable climate control unit (CCU), wherein the control unit CU, operating in processing mode, is configured to use input received from the temperature sensor to control the controllable climate control unit to maintain a target temperature in the environment inside the processing chamber 100. The target temperature may be stored in the memory of the control unit CU, and / or received from input made by a user of the system, and / or received via a communication network by a node (e.g., a node in the form of a smartphone).

[0070] In one embodiment, one or more sensors S2, S2 of the processing chamber 100 include at least one humidity sensor (not shown), and the system further includes a controllable humidifier CH, wherein a control unit CU operating in processing mode is configured to control the controllable humidifier using input received from the humidity sensor to maintain a target humidity level in the environment inside the processing chamber 100. The target humidity level may be stored in the memory of the control unit CU, and / or received from input made by a user of the system, and / or received via a communication network by a node (e.g., a node in the form of a smartphone).

[0071] In one embodiment, the conveyor arrangement 130 is provided with a drive unit 140 configured to rotate the shaft of the conveyor arrangement 130 about a longitudinal axis of the shaft in a clockwise or counterclockwise direction. The drive unit 140 is communicatively coupled to a control unit CU and configured to control the rotation of the shaft in response to control signals received from the control unit CU, and to provide the control unit CU with the status of the drive unit 140 and / or the conveyor arrangement 130, such as revolutions per minute and direction of rotation. For example, the drive unit 140 may be implemented as a servo motor.

[0072] In one embodiment, the control unit CU is communicatively connected to / via a communication network and is further configured to transmit the status of the system to one or more nodes via the communication network, and / or receive commands from one or more nodes via the communication network. Examples of status include whether a process is running, measuring temperature, humidity, or measuring ozone concentration levels. Examples of commands are commands to start or stop the process.

[0073] In some implementations of the system, the total height of the room in which the system is located is limited. In one embodiment, entrance 110 is located in the lower half of processing room 100. Regarding... Figure 4 and Figure 7 An example of this embodiment is further described.

[0074] The system may further include additional sensors outside the treatment chamber 100 that can detect any ozone leaks and alert the system's users.

[0075] Figure 3 A method according to one or more embodiments of the present disclosure is illustrated. The method comprises, as described above... Figure 1 The system control unit CU of the described waste treatment chamber 100 is executed. The waste treatment chamber 100 is configured to operate in any of the following modes: loading mode, processing mode, and unloading mode, the method comprising:

[0076] Step 310: Perform the following operations in loading mode via the control system:

[0077] In loading mode, inlet 110 is opened or controlled to open to receive particles of medical waste; in loading mode, outlet 120 is closed or controlled to close to provide an airtight seal between the inner and outer environments of the processing chamber (100); and optionally, the received particles of medical waste are agitated or agitation of the received particles of medical waste is controlled. The inlet can be opened or controlled to open by sending a control signal from the control unit CU to an actuator operated on and mechanically connected to the inlet 110, such as a servo motor moving a hatch covering the inlet 110 via a suitable mechanism. Similarly, outlet 120 can be closed or controlled to close by sending a control signal from the control unit CU to an actuator operated on and mechanically connected to the outlet, such as a servo motor moving a hatch covering the outlet via a suitable mechanism. By sending control signals from the control unit CU to an actuator operating on and mechanically connected to the particle conveying arrangement 130, such as a servo motor 140 that rotates the shaft of the particle conveying arrangement 130, the particles can be stirred or the stirring of the particles can be controlled.

[0078] Step 320: Operate in processing mode by performing the following steps through the control system:

[0079] Closing inlet 110 or controlling the closure of inlet 110 to provide an airtight seal between the inner and outer environments of the treatment chamber 100, agitate received medical waste particles, and generate ozone and maintain a target ozone concentration level in the inner environment of the treatment chamber 100, for example, during a set time period of 1-10 hours.

[0080] The closure of inlet 110 can be controlled by sending a control signal from the control unit CU to an actuator operating on and mechanically connected to inlet 110, such as a servo motor that moves a hatch covering the outlet via a suitable mechanism. The particles can be agitated or controlled by sending a control signal from the control unit CU to an actuator operating on and mechanically connected to particle conveying arrangement 130, such as a servo motor 140 that rotates the shaft of particle conveying arrangement 130. Ozone can be generated and maintained at a target ozone concentration level, or ozone generation can be controlled and maintained at a target ozone concentration level, by receiving a control signal from one or more sensors S1, S2, which indicates the measured ozone concentration level of the environment inside the processing chamber 100. Furthermore, the measured concentration level and the received concentration level are compared with the target concentration level retrieved, for example, from the memory of the control unit CU. Additionally, a control signal indicating the desired generation of ozone, resulting in the achievement of the target ozone level, is sent to the generator G. In one example, if the comparison shows that the measured ozone concentration level is lower than the target concentration level, a control signal indicating a relatively high ozone generation rate is sent to generator G. In another example, if the comparison shows that the measured ozone concentration level is higher than the target concentration level, a control signal indicating a relatively low ozone generation rate is sent to generator G.

[0081] Step 330: Perform the following operations in unloading mode via the control system:

[0082] Open outlet 120 or control the opening of outlet 120 to remove medical waste particles from processing chamber 100, and agitate the medical waste particles or control the agitation of the medical waste particles and move them toward outlet 120.

[0083] By sending control signals from the control unit CU to an actuator operating on and mechanically connected to the outlet 120, such as a servo motor that moves the hatch covering the outlet 120 via a suitable mechanism, the outlet 120 can be opened or its opening controlled. By sending control signals from the control unit CU to an actuator operating on and mechanically connected to the particle conveying arrangement 130, such as a servo motor 140 that rotates the shaft of the particle conveying arrangement 130, the particles can be agitated and moved toward the outlet 120, or controlled to be agitated and moved toward the outlet 120. Figure 6A As shown in -B, the blades can be mounted on a blade shaft and can be controlled to be oriented in unloading mode at an angle of, for example, forty-five degrees between the normal to its flat surface and the longitudinal axis of the elongated processing chamber 100 (in the direction toward the outlet). In this way, the particles of medical waste are agitated and moved toward the outlet.

[0084] In one embodiment, generating ozone and maintaining a target ozone concentration level, or controlling ozone generation and maintaining a target ozone concentration level, is performed using measurements of ozone concentration levels.

[0085] In one example, the measured ozone concentration level is below the target level, and the ozone generation rate is increased by generator G. In another example, the measured ozone concentration level is above the target level, and the ozone generation rate is decreased by generator G. In other words, the measured ozone concentration level is used by generator G to maintain a constant ozone concentration level.

[0086] The system may further include additional sensors outside the treatment chamber 100 that can detect any ozone leaks and alert the system's users.

[0087] In one embodiment, one or more sensors S1, S2 include at least one temperature sensor configured to measure the temperature of the environment inside the processing chamber 100, wherein the system further includes a controllable climate control unit configured to maintain a target temperature of the environment inside the processing chamber 100, wherein the method further includes using the measured temperature to maintain the target temperature.

[0088] Maintaining the target temperature using a measured temperature can be performed by the CU receiving control signals from one or more sensors S1, S2, indicating the measured temperature of the environment inside the processing chamber 100. Furthermore, the measured temperature is compared by the CU with a target temperature, for example, retrieved from the memory of the control unit CU. Additionally, a control signal instructing desired climate control resulting in achieving the target temperature is sent to the climate control unit CCU. In one example, if the comparison shows the measured temperature is lower than the target temperature, a control signal instructing heat generation is sent to the climate control unit CCU. In another example, if the comparison shows the measured temperature is higher than the target temperature level, a control signal instructing cooling is sent to the climate control unit CCU.

[0089] In one embodiment, one or more sensors S1, S2 include at least one humidity sensor configured to measure the humidity of the environment inside the processing chamber 100, wherein the system further includes a controllable humidifier configured to maintain a target humidity of the environment inside the processing chamber (100), wherein the method further includes using the measured humidity to maintain the target humidity.

[0090] Maintaining the target humidity using measured humidity can be performed by receiving control signals from one or more sensors S1, S2, indicating the measured humidity of the environment inside the processing chamber 100. Furthermore, the measured humidity is compared with the target humidity retrieved, for example, from the memory of the control unit CU. Additionally, a control signal instructing desired humidity control resulting in achieving the target humidity is sent to the humidity control unit. In one example, if the comparison shows that the measured humidity is lower than the target humidity, a control signal instructing the generation of humidity is sent to the climate control unit CCU. In another example, if the comparison shows that the measured temperature is higher than the target temperature level, a control signal instructing the reduction of humidity is sent to the climate control unit CCU.

[0091] In one embodiment, and before commencing operation in unloading mode, the method further includes opening a controllable gas inlet configured to provide fresh air to the processing chamber 100, and / or opening a controllable gas outlet configured to exhaust gas from the environment within the processing chamber 100. The controllable gas inlet is opened by sending a control signal from the control unit CU to an actuator operated on and mechanically connected to the controllable gas inlet, such as a servo motor moving a valve via a suitable mechanism. The controllable gas outlet is opened by sending a control signal from the control unit CU to an actuator operated on and mechanically connected to the controllable gas outlet, such as a servo motor moving a valve.

[0092] Figure 4 A system with reduced height according to one or more embodiments is shown. In one embodiment, the system includes a shredder 420 that receives and processes medical waste into particles, and supplies the particles to the inlet 110 of a waste treatment chamber 100. The total height of the system can be as high as 3.5 meters. Therefore, it may be desirable to find a configuration that requires a smaller ceiling height.

[0093] In this configuration, inlet 110 is located on the lower half of processing chamber 100, for example, at the bottom of processing chamber 100. Crusher assembly 400 is coupled to inlet 110 of processing chamber 100. Crusher assembly 400 includes hopper 410 and crusher / grinding unit 420.

[0094] In one embodiment, the pulverizer assembly 400 further includes one or more feeder units, such as a first feeder piston or a first conveying screw 430 and / or a second feeder piston or a second conveying screw 440.

[0095] Optionally, the crusher assembly 400 further includes a first inspection window 450 and / or a second inspection window 460.

[0096] Hopper 410 is configured to receive all medical waste.

[0097] In one example, a first feeder unit (e.g., a first feeder piston or a first conveying screw 430) is configured to supply all received medical waste to a shredder unit 420. Alternatively, a second feeder unit (e.g., a second feeder piston or a second conveying screw 440) is configured to supply particles of medical waste to an inlet 110 of a coupled waste treatment chamber 100.

[0098] In another example, a first feeder piston 430 is configured to supply all received medical waste to a shredder unit 420. The shredder unit 420 is configured to process all medical waste into particles. A second feeder piston 440 is configured to supply the particles of medical waste to the inlet 110 of a connected waste treatment chamber 100.

[0099] Optionally, the shredder assembly 400 is provided with a first inspection window 450 for inspecting particles of shredded medical waste directly after the shredder unit 420. Optionally, the shredder assembly 400 is further provided with a second inspection window 460 for inspecting particles of shredded medical waste supplied to the inlet 110.

[0100] In one embodiment, the first feeder piston 430 and / or the second feeder piston 440 are tilted relative to a horizontal plane to allow fluid to escape through a discharge port.

[0101] exist Figure 4 In the illustrated embodiment, the first feeder unit 430 and the second feeder unit 440 are inclined relative to the horizontal plane; however, it is understood that the first feeder unit 430 and the second feeder unit 440 may also be flush with and / or parallel to the horizontal plane. Figure 4 The opposite of the way shown.

[0102] In one embodiment, the first feeder piston 430 is controlled by a control unit CU to move under a force that continuously adapts to a specific dynamic resistance retrieved from the CU, and moves relatively slower than the movement of the second feeder piston 440 controlled by the control unit CU.

[0103] Figure 5A -D indicates the movement between the positions of the second feeder piston 440.

[0104] In one embodiment, the second feeder piston 440 is arranged to move to Figure 5A The maximum retraction position MR shown is... Figure 5B The supply retraction position FR shown in the figure Figure 5C The supply advance position FF shown is... Figure 5D The positions between the maximum forward positions MF shown in the figure.

[0105] When the processing chamber is operating in loading mode, the second feeder piston 440 is controlled by the control unit CU to move between the feed retraction position FR and the feed forward position FF.

[0106] When the processing chamber is operating in processing mode, the second feeder piston 440 is controlled by the control unit CU to move to the maximum forward position MF, thereby creating an airtight seal at the inlet 110. In other words, an airtight seal is created between the inner and outer atmospheres of the processing chamber 100.

[0107] When the processing chamber is operating in unloading mode, the second feeder piston 440 is controlled by the control unit CU to move to the maximum retracted position MR, thereby allowing inspection windows 450 and 460 to be opened and the entire crusher assembly unit 400 to be cleaned by flushing, and the fluid trapped in the second feeder piston housing is discharged through the discharge port 510.

[0108] Figure 6A A side view of a conveyor arrangement 130 according to one or more embodiments of the present disclosure is shown. In this embodiment, the conveyor arrangement 130 is provided with a shaft or drive shaft 610 and one or more blades 620 having a longitudinal axis parallel to the longitudinal axis of the elongated processing chamber 100, the blades extending in a direction orthogonal to the longitudinal axis of the shaft. Each of the one or more blades 620 may be mounted on a blade shaft 630. The shaft or drive shaft 610 may be rotated about its longitudinal axis by a drive unit 140 (e.g., a servo motor).

[0109] Figure 6B A top view of a conveyor arrangement structure 130 according to one or more embodiments of the present disclosure is shown. (See from...) Figure 6B As can be seen, one or more blades 620 are formed in a V shape. One or more blades 620 are formed with a leg of the V shape perpendicular to the longitudinal axis of the shaft or drive shaft 610 and a second leg at an angle (e.g., 30-60 degrees) relative to the first leg.

[0110] This has the following effect: when the shaft or drive shaft 610 is moving in one direction (by... Figure 6B As the shaft or drive shaft 610 rotates in the opposite direction (as indicated by the upward-facing arrow), the particles of medical waste are agitated in the processing mode. Figure 6B As the direction (indicated by the downward arrow) rotates, the particles of medical waste are conveyed, for example, in unloading mode.

[0111] It is understood that, without departing from the scope of the invention, the shaft or drive shaft 610 may be provided with any suitable number of one or more blades 620 and / or blade shafts 630.

[0112] Figure 7 A shredder assembly 700 according to one or more embodiments of the present disclosure is shown.

[0113] A shredder assembly 700 is connected to the inlet 110 of the processing chamber 100. This shredder assembly is configured to receive medical waste and process it into particles, and to supply the processed medical waste particles to the inlet 110 of the waste processing chamber 100. The shredder assembly 700 includes a hopper 710 and a shredder unit 720, which is configured to receive medical waste and process it into particles, similar to... Figure 4 As shown in the figure. In one embodiment, the shredder assembly 700 further includes at least one feeder unit 730 to supply particles of processed medical waste to the inlet 110 of the waste treatment chamber 100. For example, as Figure 4 As shown, the feeder unit 730 may be a screw conveyor or one or more pistons. The feeder unit 730 may be provided with a low-friction coating, such as a polymer coating, to allow particles of medical waste to move more easily into the treatment chamber 100.

[0114] In this configuration, the inlet 110 is located on the lower half of the processing chamber 100, for example, at the bottom of the processing chamber 100. Optionally, the pulverizer assembly 700 further includes a first inspection window 750.

[0115] Entrance 110 can be placed at any suitable location on the processing chamber 100, for example, Figure 1 On the top half of the processing chamber 100 shown, or as Figure 4 The lower half of the processing chamber 100 shown.

[0116] The advantage of placing the inlet 110 on the top half of the treatment chamber 100 is that gravity will supply the particles of treated medical waste to the inlet 110 of the waste treatment chamber 100, and no separate feeder unit is required to supply the particles of treated medical waste to the inlet 110 of the waste treatment chamber 100.

[0117] The advantage of placing the entrance 110 on the lower half of the processing chamber 100 is that it reduces the overall height of the waste treatment system, including the waste processing chamber.

[0118] The hopper 710 is configured to receive all medical waste. The shredder unit 720 is configured to process all medical waste into medical waste particles. The feeder unit 730 is configured to supply the medical waste particles to the inlet 110 of the connected waste treatment chamber 100.

[0119] Optionally, the crusher assembly 700 is provided with a cover 770 to provide an airtight seal between the interior of the hopper and the surrounding atmosphere. The hopper 710, crusher 720, feeder unit 730, and cover 770 thus form an airtight enclosure. In this embodiment, Figure 3 The method in step 320 may further include operating in a processing mode by controlling the system to open inlet 110 or controlling the opening of inlet 110 to allow a target concentration level of ozone to enter the pulverizer assembly 700 into the interior environment of the processing chamber 100. This sterilizes the interior of the pulverizer assembly 700 and / or removes any unwanted odors.

[0120] Optionally, the shredder assembly 700 is provided with a first inspection window 750, in which particles of shredded medical waste can be inspected directly after the shredder unit 720.

[0121] In one embodiment, the feeder unit 730 is tilted relative to a horizontal plane (e.g., a floor shown as a thick black line) to allow fluid to flow in a desired direction.

[0122] In one embodiment, the pulverizer unit 720 and / or the feeder unit 730 are controlled by the control unit CU.

[0123] Figure 8 A vacuuming component 800 according to one or more embodiments of the present disclosure is shown.

[0124] A vacuum assembly 800 is coupled to an outlet 120 of a processing chamber 100. The vacuum assembly is configured to remove particles of processed / treated medical waste from the processing chamber 100 and move the removed medical waste particles to a storage container 850 for use as a location for removing medical waste particles from the waste processing chamber 100.

[0125] The evacuation assembly 800 typically includes a pressure tank 820 configured to maintain a pressure below atmospheric pressure, i.e., a vacuum. The evacuation assembly 800 typically further includes a coupling device / unit 810 arranged to connect and / or hermetically connect the outlet 120 of the processing chamber 100 to the pressure tank 820 to allow particles to flow from the processing chamber 100 to the pressure tank 820. For example, the coupling device / unit 810 may include a conduit component such as a tube or conduit. By providing a pressure below atmospheric pressure, this allows the evacuation assembly 800 to extract particles of medical waste from the processing chamber 100, thereby removing processed / treated medical waste particles from the processing chamber 100.

[0126] The evacuation assembly 800 further includes a gate unit 830 configured to move particles of removed medical waste from the pressure vessel 820 to the storage container 850 while simultaneously forming a seal on the pressure vessel 820 to maintain a vacuum within it. Details of the gate unit 830 are further provided with reference to Figure 9.

[0127] The pressure vessel 820 and the gate unit 830 are typically arranged together as a component. The pressure vessel 820 and the gate unit 830 can be advantageously positioned above the storage container 850. As particles of medical waste move from the vessel, gravity forces the particles into the container.

[0128] Optionally, the evacuation assembly 800 may further include a discharge port 840 configured to discharge fluid from the coupling device / unit 810. Optionally, the discharge port 840 may be provided with a valve that can be positioned in an open or closed position to maintain a vacuum in the coupling device / unit 810 and the pressure tank 820.

[0129] Figure 9A A side view of a evacuation assembly 800 according to one or more embodiments of the present disclosure is shown. To generate a vacuum in the pressure vessel used by the coupling device / unit 810 to remove particles from the processing chamber 100, the evacuation assembly 800 is provided with a second coupling device / unit 910. For example, the second coupling device / unit 910 may include a conduit component such as a tube or pipe. The second coupling device / unit 910 generates a vacuum or a pressure below atmospheric pressure by removing the gas contained in the pressure vessel 820.

[0130] Figure 9B A front view of a vacuum assembly 800 according to one or more embodiments of the present disclosure is shown. In this embodiment, a gate unit 830 is formed as a tube including a gate member (shaped like a revolving door) and provided with a gas-impermeable seal. The gate member rotates about the central axis of the tube and inside the tube. Since the tube provides at least one first opening facing the pressure tank 820 and a second opening facing the storage container 850, particles of medical waste removed fall into the gate unit 830 through the first opening and through the second opening into the storage container 850 as the gate member rotates.

[0131] Figure 10A A shredder assembly 1000, according to one or more embodiments of the present disclosure, is shown prior to operation of a waste treatment system in a loading mode. The shredder assembly 1000 corresponds to... Figure 4 and Figure 7The shredder assemblies 400 and 700 shown below, and the features described below, are equally applicable to shredder assemblies 400 and 700. Shredder assembly 1000 includes a shredder 1020 configured to receive medical waste and process it into particles of medical waste. Shredder 1020 may include a drive unit or be coupled to an external drive unit 1021 via a transmission arrangement such as shafts, chains and sprockets or pulleys and belts. Shredder assembly 1000 further includes a hopper 1010 configured to receive all medical waste. Hopper 1010 is coupled to shredder 1020, thereby allowing all medical waste to arrive at / be loaded into shredder 1020 for processing into particles of medical waste. Hopper 1010 may be directly coupled to move waste depending on gravity, or coupled via a feeder unit as described above. In one embodiment, hopper 1010 is provided with Figure 10A The hatch / cover 1014 is shown in the open position. The hopper 1010 is configured to receive medical waste when the hatch / cover 1014 is positioned in the open position. Optionally, the hopper 1010 may include one or more vents 1012, 1013 configured to ventilate from the interior of the hopper 1010. Optionally, the hopper 1010 may further include a cleaning unit 1011, such as a nozzle coupled to pressurized water. The cleaning unit 1011 is configured to spray the interior of the hopper 1010 and / or the pulverizer unit 1020 with a cleaning fluid, such as water with or without detergent.

[0132] Figure 10B A shredder assembly 1000, according to one or more embodiments of the present disclosure, is shown before or during operation of a waste treatment system in a loading mode. The shredder assembly 1000 corresponds to... Figure 4 and Figure 7 The pulverizer assemblies 400 and 700 shown herein, and the features described below, also apply to pulverizer assemblies 400 and 700. Pulverizer assembly 1000 may include, with respect to... Figure 10A The same characteristics described. In Figure 10B In this configuration, the hatch / cover 1014 is positioned in the closed position. Preferably, the cleaning unit 1011 is configured to spray cleaning fluid into the interior of the hopper 1010 and / or the crusher unit 1020 only when the hatch / cover 1014 is positioned in the closed position.

[0133] Figure 11 An example is shown of a shredder assembly 1000 receiving all medical waste before the waste treatment system operates in loading mode, according to one or more embodiments of the present disclosure.

[0134] The box actuator unit 1130 can be configured to empty the box / container containing all medical waste into the hopper 1010 when the hatch / cover 1014 is positioned in the open position.

[0135] Finally, it should be understood that the present invention is not limited to the embodiments described above, but also relates to and incorporates all embodiments within the scope of this disclosure.

Claims

1. A waste treatment chamber (100) configured to operate in any of a loading mode, a treatment mode, and an unloading mode, further configured to provide an environment for particulate disinfection of medical waste using ozone in the treatment mode, said treatment chamber comprising: An inlet (110) is configured to receive the particles of medical waste in the loading mode and to provide an airtight seal between the inner and outer environments of the processing chamber (100) in the processing and unloading modes. An outlet (120) is configured to remove the particles of medical waste from the processing chamber (100) in the unloading mode, and is configured to provide an airtight seal between the inner and outer environments of the processing chamber (100) in both the loading and processing modes. A particle conveying arrangement structure (130) is configured to agitate the particles of medical waste in the loading mode and the processing mode, and is further configured to move the particles of medical waste to the outlet (120) for removal in the unloading mode. One or more sensors (S1, S2) configured to measure characteristics of the internal environment of the processing chamber (100), wherein the one or more sensors (S1, S2) include at least one temperature sensor configured to measure the temperature of the internal environment of the processing chamber (100). The treatment chamber (100) is further fluidly connected to or includes a generator (G) configured to generate ozone and maintain a target ozone concentration level in the environment inside the treatment chamber (100), wherein the treatment chamber (100) further includes a controllable climate control unit configured to maintain a target temperature in the environment inside the treatment chamber (100).

2. The waste treatment room according to claim 1, wherein, The one or more sensors (S1, S2) include at least one ozone sensor configured to measure the ozone concentration level of the environment inside the processing chamber (100).

3. The waste treatment room according to claim 1, wherein, The generator (G) is releasably attached to the processing chamber (100).

4. The waste treatment room according to any one of claims 1 to 3, wherein, The one or more sensors (S1, S2) include at least one humidity sensor configured to measure the humidity of the environment inside the processing chamber (100).

5. The waste treatment chamber according to any one of claims 1 to 3, further comprising a controllable humidifier configured to maintain a target humidity of the interior environment of the treatment chamber (100).

6. The waste treatment room according to any one of claims 1 to 3, wherein, The processing chamber (100) is provided with an inspection window arranged on the upper half of the processing chamber (100).

7. The waste treatment room according to any one of claims 1 to 3, wherein, The conveying arrangement structure (130) is provided with a shaft and blades, the shaft having a longitudinal axis parallel to the longitudinal axis of the processing chamber (100), and the blades extending in a direction orthogonal to the longitudinal axis of the shaft.

8. The waste treatment room according to any one of claims 1 to 3, wherein, The processing chamber further includes: A controllable gas inlet is configured to provide fresh air to the processing chamber (100). A controllable gas outlet is configured to discharge gas from the environment in the processing chamber (100).

9. A waste treatment system configured to use ozone to disinfect particulate medical waste, the waste treatment system comprising: Waste treatment room (100) according to any one of claims 1 to 8. A control unit (CU) configured to control the processing chamber (100) to operate in any of the following modes: loading mode, processing mode, and unloading mode, wherein the control unit (CU) operating in the processing mode is configured to control the generator (G) using an input received from at least one of the one or more sensors (S2, S2), the input indicating a measured ozone concentration level inside the processing chamber (100).

10. The waste treatment system according to claim 9, wherein, The one or more sensors (S2, S2) include at least one temperature sensor, and the waste treatment system further includes a controllable climate control unit, wherein the control unit (CU) operating in the treatment mode is configured to control the controllable climate control unit using input received from the temperature sensor to maintain a target temperature in the environment inside the treatment chamber (100).

11. The waste treatment system according to claim 9, wherein, The one or more sensors (S2, S2) include at least one humidity sensor, and the waste treatment system further includes a controllable humidifier, wherein the control unit (CU) operating in the treatment mode is configured to control the controllable humidifier using input received from the humidity sensor to maintain a target humidity in the environment inside the treatment chamber (100).

12. The waste treatment system according to any one of claims 9 to 11, wherein, The control unit (CU) is communicatively connected to a communication network and is further configured to transmit the status of the waste treatment system to one or more nodes via the communication network, and / or receive commands from the one or more nodes via the communication network.

13. The waste treatment system according to any one of claims 9 to 11, wherein, The entrance (110) is located on the lower half of the processing chamber (100).

14. The waste treatment system according to any one of claims 9 to 11, further comprising a shredder assembly (700) fluidly connected to an inlet (110) of the treatment chamber (100), the shredder assembly being configured to receive medical waste and process it into particles of medical waste, and to supply the processed particles of medical waste to the inlet (110) of the waste treatment chamber (100).

15. The waste treatment system according to any one of claims 9 to 11, further comprising a evacuation assembly (800) fluidly connected to an outlet (120) of the treatment chamber (100), the evacuation assembly being configured to remove particles of treated / processed medical waste from the treatment chamber (100) and to move the removed particles of medical waste to a storage container (850).

16. A method performed by a control unit (CU) of a system comprising a waste treatment chamber (100) according to any one of claims 1 to 8, the waste treatment chamber (100) being configured to operate in any one of a loading mode, a processing mode, and an unloading mode, the method comprising: To operate in the loading mode, follow these steps: In the loading mode, the inlet (110) is opened to receive the particles of medical waste. In the loading mode, the outlet (120) is closed to provide an airtight seal between the inner and outer environments of the processing chamber (100). In the loading mode, the received medical waste particles are agitated. Operate in the processing mode by following these steps: In the processing mode, the inlet (110) is closed to provide an airtight seal between the inner and outer environments of the processing chamber (100). In the processing mode, the received medical waste particles are agitated. In the treatment mode, ozone is generated and the target concentration level of ozone in the environment inside the treatment chamber (100) is maintained. Perform the following steps in the uninstallation mode: In the unloading mode, the outlet (120) is opened to remove the particles of medical waste from the processing chamber (100).

17. The method according to claim 16, wherein, The one or more sensors (S1, S2) include at least one ozone sensor configured to measure the ozone concentration level of the environment inside the processing chamber (100), wherein generating ozone and maintaining a target ozone concentration level are performed using the measured ozone concentration level.

18. The method according to claim 16, wherein, The one or more sensors (S1, S2) include at least one temperature sensor configured to measure the temperature of the environment inside the processing chamber (100), wherein the system further includes a controllable climate control unit configured to maintain a target temperature of the environment inside the processing chamber (100), wherein the method further includes using the measured temperature to maintain the target temperature.

19. The method of claim 16, wherein, The one or more sensors (S1, S2) include at least one humidity sensor configured to measure the humidity of the environment inside the processing chamber (100), wherein the system further includes a controllable humidifier configured to maintain a target humidity of the environment inside the processing chamber (100), and wherein the method further includes maintaining the target humidity using the measured humidity.

20. The method according to any one of claims 16 to 19, wherein: The operation in the said unloading mode further includes: Open a controllable gas inlet configured to provide fresh air to the processing chamber (100) and open a controllable gas outlet configured to discharge gas from the environment in the processing chamber (100).

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