CN216984835U - Steam drying and sterilizing device and dish washing machine - Google Patents
Steam drying and sterilizing device and dish washing machine Download PDFInfo
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- CN216984835U CN216984835U CN202122946509.3U CN202122946509U CN216984835U CN 216984835 U CN216984835 U CN 216984835U CN 202122946509 U CN202122946509 U CN 202122946509U CN 216984835 U CN216984835 U CN 216984835U
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Abstract
The utility model provides a steam drying and sterilizing device and a dish washing machine.A controller controls a steam generating module to generate steam after acquiring a starting instruction, and the steam enters a steam storage chamber; the temperature sensor detects the temperature of steam in the steam storage chamber; the pressure sensor detects the pressure of the steam in the steam storage chamber; when the temperature and the pressure of the steam in the steam storage chamber meet preset first conditions, the controller controls the steam storage chamber to be communicated with the preset space, so that the steam in the steam storage chamber enters the preset space, and cleaned objects in the preset space are dried and sterilized. According to the utility model, the steam storage chamber is arranged, so that the steam generated by the steam generation module continuously is passively pressurized in the steam storage chamber, and the temperature of the steam is increased along with the increase of the pressure, so that the cleaned objects in the preset space are dried and sterilized by the steam with higher temperature, and the sterilization effect of the steam is improved.
Description
Technical Field
The utility model relates to the technical field of household appliances, in particular to a steam drying and sterilizing device and a dish washing machine.
Background
In the related art, steam is generally generated in a steam generator and circulated in a setting space, so as to dry and sterilize the washed articles in the setting control. In the above method, the steam temperature is usually below 100 ℃, which is not favorable for sterilization, resulting in poor sterilization effect.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a steam drying and sterilizing device and a dish washing machine, so as to improve the sterilizing effect of steam.
In a first aspect, an embodiment of the present invention provides a steam drying and sterilizing device, including a steam generator, a steam storage chamber, a temperature sensor, a pressure sensor, and a controller; the steam generator is communicated with the steam gas storage chamber; the controller is respectively connected with the steam generator, the steam gas storage chamber, the temperature sensor and the pressure sensor; the controller is used for controlling the steam generator to generate steam after the starting instruction is obtained, and the steam enters the steam storage chamber; the temperature sensor is used for detecting the temperature of the steam in the steam air storage chamber; the pressure sensor is used for detecting the pressure of the steam in the steam air storage chamber; the controller is used for controlling the steam air storage chamber to be communicated with the preset space when the temperature and the pressure of the steam in the steam air storage chamber meet preset first conditions, so that the steam in the steam air storage chamber enters the preset space, and the cleaned objects in the preset space are dried and sterilized.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the controller is further configured to control the steam generator to stop generating steam when the temperature of the steam storage chamber and the pressure of the steam storage chamber meet a preset first condition; the controller is also used for controlling the steam generator to generate steam when the temperature of the steam storage chamber and the pressure of the steam storage chamber meet a preset second condition.
With reference to the first aspect, embodiments of the present invention provide a second possible implementation manner of the first aspect, where the apparatus further includes an evacuation motor; the evacuation motor is connected with the controller; the evacuation motor is communicated with the preset space; the controller is also used for controlling the evacuation motor to evacuate air in the preset space after the starting instruction is obtained.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the controller is further configured to control the evacuation motor to stop working when an air pressure in the preset space is less than or equal to a first preset pressure, and control the evacuation motor to extract air in the preset space after a first preset time after the evacuation motor stops working and when a working frequency of the evacuation motor is less than a preset frequency.
With reference to the third possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the controller is further configured to control the steam generator to stop generating steam and control the steam storage chamber to stop communicating with the preset space after the evacuation motor is operated for a second preset time after the evacuation motor stops operating and the number of times of operation of the evacuation motor is equal to the preset number.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the apparatus further includes a compressor; the controller is also used for controlling the steam storage chamber to stop communicating with the preset space after the preset time of the starting instruction is obtained, controlling the evacuation motor to extract air in the preset space, and controlling the compressor to blow in clean air to the preset space.
With reference to the fifth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the compressor includes an air filtering device; the compressor blows clean air into the preset space through the air filtering device.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the center of gravity of the steam generator is lower than the center of gravity of the steam storage chamber.
With reference to the first aspect, embodiments of the present invention provide an eighth possible implementation manner of the first aspect, wherein an outer wall of the steam storage chamber is provided with a valve; the controller controls the steam air storage chamber to be communicated with a preset space by controlling the valve to be opened.
In a second aspect, the embodiment of the utility model further provides a dishwasher, which includes the steam drying and sterilizing device and a dishwasher body; the dishwasher body comprises a preset space which can be communicated with a steam storage chamber of the steam drying and sterilizing device.
The embodiment of the utility model has the following beneficial effects:
the embodiment of the utility model provides a steam drying and sterilizing device and a dish washing machine, wherein a controller controls a steam generator to generate steam after acquiring a starting instruction, and the steam enters a steam storage chamber; the temperature sensor detects the temperature of the steam in the steam air storage chamber; the pressure sensor detects the pressure of the steam in the steam air storage chamber; and when the temperature and the pressure of the steam in the steam gas storage chamber meet preset first conditions, the controller controls the steam gas storage chamber to be communicated with the preset space, so that the steam in the steam gas storage chamber enters the preset space, and the cleaned objects in the preset space are dried and sterilized. This mode is through setting up the steam gas receiver for the steam that steam generator constantly produced is at the passive pressurization of steam gas receiver, and its temperature risees along with the rising of pressure, thereby dry and the sterilization through the higher steam of temperature to the article that have washd in presetting the space, has improved the sterilization effect of steam.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a steam drying and sterilizing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another steam drying and sterilizing apparatus provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dishwasher according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
With the improvement of living standard and the popularization of dish washing machines, people pursue a machine for multiple purposes, pursue a washing procedure of tableware, and pay more and more attention to the drying and sterilization degree of the tableware; therefore, many dishwashers are added with a steam generation module, and the steam is used for drying and sterilizing; however, the steam drying and sterilization of the existing dish washer are basically realized by a circulating steam method, the steam temperature is below 100 ℃, and the steam is mixed with unclean air in the dish washer, so that the sterilization is not facilitated, and the sterilization effect is general.
Therefore, the steam drying and sterilizing device and the dish washing machine provided by the embodiment of the utility model can be applied to various electric appliances needing steam drying and sterilizing.
For the convenience of understanding the present embodiment, a steam drying and sterilizing apparatus disclosed in the present embodiment will be described in detail.
The embodiment of the utility model provides a steam drying and sterilizing device. As shown in fig. 1, the apparatus includes a steam generation module 10, a steam storage chamber 20, a temperature sensor 30, a pressure sensor 40, and a controller 50. Wherein, the steam generating module is communicated with the steam storage chamber; the controller is respectively connected with the steam generation module, the steam storage chamber, the temperature sensor and the pressure sensor. The connection of the curves in fig. 1 represents the connectivity. The steam accumulator may be in communication with a preset space 1000, indicated in fig. 1 as communication, under the control of the controller.
The controller is used for controlling the steam generation module to generate steam after acquiring the starting instruction, and the steam enters the steam storage chamber; the temperature sensor is used for detecting the temperature of steam in the steam storage chamber; the pressure sensor is used for detecting the pressure of steam in the steam storage chamber; the controller is used for controlling the steam storage chamber to be communicated with the preset space when the temperature and the pressure of the steam in the steam storage chamber meet preset first conditions, so that the steam in the steam storage chamber enters the preset space, and cleaned objects in the preset space are dried and sterilized.
In the process of specific implementation, a temperature sensor and a pressure sensor can be arranged in the inner wall of the steam storage chamber, and the temperature and the pressure of the steam in the steam storage chamber are respectively detected through the temperature sensor and the pressure sensor. The temperature sensor and the pressure sensor send detected data to the controller, the controller compares the received temperature with a first preset temperature according to a preset frequency, and compares the received pressure with a first preset pressure, and the preset first condition can be that the pressure of steam in the steam storage chamber is greater than or equal to the preset pressure. When the first preset condition is met, the controller can control the steam storage chamber to be communicated with the preset space, so that steam in the steam storage chamber enters the preset space, and cleaned objects in the preset space are dried and sterilized. In order to make it easier for steam to enter the steam storage chamber, the center of gravity of the steam generation module may be set lower than the center of gravity of the steam storage chamber when set.
Wherein, in order to improve the sterilization effect, above-mentioned preset pressure is higher than atmospheric pressure, and steam along with steam generation module production constantly gets into steam storage room, and the pressure of steam storage room also constantly rises, and the temperature of steam also can rise simultaneously to produce the higher steam of temperature. Correspondingly, the preset temperature is typically a temperature higher than 100 ℃, and may be set based on the sterilization effect of steam at different temperatures, such as 121 ℃ and the like.
When the temperature of the steam storage chamber and the pressure of the steam storage chamber meet a preset first condition, the controller can control the steam generation module to stop generating steam, continuously compare the received temperature with the preset temperature, and compare the received pressure with the preset pressure. Since the pressure inside the steam storage chamber is higher than the internal pressure of the preset space (generally, atmospheric pressure), the steam inside the steam storage chamber enters the preset space, and the pressure inside the steam storage chamber decreases.
When the pressure of the steam in the steam storage chamber is detected to be smaller than a second preset pressure or the temperature of the steam in the steam storage chamber is detected to be smaller than a second preset temperature, the steam generation module can be controlled to generate the steam. The pressure of the steam in the steam storage chamber is smaller than a second preset pressure, or the temperature of the steam in the steam storage chamber is smaller than a second preset temperature, which can be regarded as a second condition, that is, when the temperature of the steam storage chamber and the pressure of the steam storage chamber meet the second preset condition, the controller controls the steam generation module to generate the steam, so as to maintain the temperature and the pressure of the steam in the steam storage chamber within a preset range.
In order to make the steam in the steam storage chamber more fully fill the preset space, the device also comprises an evacuating motor; the evacuation motor is connected with the controller; the evacuation motor is communicated with the preset space; the controller is also used for controlling the evacuation motor to extract air in the preset space after acquiring the drying instruction. And when the air pressure in the preset space is less than or equal to the first preset pressure, controlling the evacuation motor to stop working. After the high-temperature steam is fully mixed with the air in the preset space, namely after the evacuation motor stops working for a first preset time, and the working times of the evacuation motor are less than the preset times, the evacuation motor is controlled to extract the air in the preset space so as to extract the mixed gas of the steam and the air in the preset space, and meanwhile, the air pressure in the preset space is reduced. Wherein, the preset times are counted after receiving the starting instruction from the controller.
After the evacuation motor intermittently operates for several times, the steam content in the preset space can be considered to meet the sterilization requirement, and at the moment, the evacuation motor can be controlled to stop operating, so that the steam in the preset space can sterilize the cleaned articles in the preset space. Wherein, the working times of the evacuation motor can be set times. The set number of times may be determined by trial and error. After the working frequency of the evacuation motor is equal to the preset frequency and the evacuation motor stops working for the second preset time, namely after the steam continuously sterilizes the cleaned articles for the second preset time, the controller can control the steam generation module to stop generating the steam and control the steam storage chamber to be communicated with the preset space, so that the drying and sterilization process of the steam is completed.
After the drying sterilization by steam, it is also necessary to perform a cooling process on the articles in the predetermined space. To achieve the cooling process, the apparatus may be provided with a compressor. In which a controller of a steam drying and sterilizing apparatus provided with an evacuation motor 60 and a compressor 70, which are respectively communicated with a preset space, is shown in fig. 2. After the preset time of the starting instruction is obtained, the steam storage chamber is controlled to be communicated with the preset space in a stopping mode, the evacuation motor is controlled to extract air in the preset space, and the compressor is controlled to blow clean air into the preset space. The preset time for acquiring the start instruction may be a time required for completing the drying and sterilizing process using steam. The compressor comprises an air filtering device; the compressor blows clean air into the preset space through the air filtering device.
The embodiment of the utility model provides a steam drying and sterilizing device.A controller controls a steam generating module to generate steam after acquiring a starting instruction, and the steam enters a steam storage chamber; the temperature sensor detects the temperature of steam in the steam storage chamber; the pressure sensor detects the pressure of steam in the steam storage chamber; when the temperature and the pressure of the steam in the steam storage chamber meet preset first conditions, the controller controls the steam storage chamber to be communicated with the preset space, so that the steam in the steam storage chamber enters the preset space, and cleaned objects in the preset space are dried and sterilized. This mode is through setting up steam storage chamber for the steam that the steam generation module constantly produced is at the passive pressurization of steam storage chamber, and its temperature risees along with the rising of pressure, thereby dry and the sterilization through the higher steam of temperature to the article of having washd in presetting the space, has improved the sterilization effect of steam.
The embodiment also provides another steam drying and sterilizing device, and the device is controlled to realize the drying and sterilizing of the tableware by high-temperature steam. The device is mainly used for drying washed tableware in the conventional dish washing machine by using a steam generator or a configuration of combining a PTC heater and a fan; wherein, the steam generator is not provided with a steam storage chamber, and the sterilization is carried out by circulating steam, so that the sterilization efficiency is low; the PTC heater and the fan are combined to achieve a general drying effect, a sterilization function is basically absent, and residual water on the surfaces of the shelf and the inner container cannot be removed.
The steam drying and sterilizing device comprises a steam generator, an evacuation motor, a compressor and the like, and can be applied to a dish washing machine. The steam generator is composed of two parts, one part is a steam generating chamber (equivalent to the steam generating module, and can also be called as a heating chamber), the other part is a steam storing chamber, and the gravity center of the steam storing chamber is higher than that of the heating chamber, so that steam can enter the steam storing chamber. Meanwhile, the steam storage chamber is equipped with a temperature detection device (corresponding to the above-mentioned "temperature sensor") and a pressure detection device (corresponding to the above-mentioned "pressure sensor").
When the dish washer works, the steam generator also starts to work, the steam generating chamber generates steam, the steam storage chamber stores the steam, the steam pressure and the temperature in the steam storage chamber continuously rise along with the continuous work of the heating chamber, and the steam generator stops working when the temperature and the pressure reach set values. After the pressure and the temperature are reduced to a certain range, the steam generator is started, so that the temperature and the pressure of the steam storage chamber are kept stable.
The evacuating motor in the above device is used to evacuate air, and in the drying stage, the unclean air in the dishwasher is evacuated, and then replaced by clean air generated by the compressor; the compressor is used for generating compressed air, and the compressor is provided with an air filtering device for generating clean compressed air which is used for replacing air in the dishwasher, cooling and drying.
Briefly, a steam generator is used to generate and store steam; the compressor is used for generating a clean air source; the evacuation motor is used to evacuate air.
The specific working process of the device is as follows: after the dish washer is started, the steam generator starts to work to generate steam, and when the steam in the steam storage chamber reaches the set pressure and temperature, the steam generator intermittently works to maintain the pressure and the steam temperature in the steam storage chamber. After the dish washer gets into the washing and finishes getting into the drying stage, the motor that evacuates begins work, takes out the inside air of dish washer, after evacuating to certain pressure, opens the steam switch, and inside steam gets into the dish washer, because steam proportion is greater than the air, therefore the inside upper strata of dish washer is clean steam, and the lower floor is for remaining non-clean air, at this moment, the motor that evacuates is restarted again, takes out the steam and the air of mixing, repeats in proper order several times.
At this time, the inside of the dish washer is filled with clean steam, and the temperature of the steam entering the inside of the dish washer is more than 100 degrees because the pressure of the steam storage chamber is higher than the atmospheric pressure; at this time, the steam generator is continuously operated such that the temperature entering the inside of the dishwasher is always higher than 100 degrees.
The steam temperature is controlled to be above 121 ℃, and the steam temperature is maintained for 15-20min, so that the level of medical sterilization can be reached, and residual water on the inner container and the shelf of the dishwasher can be removed.
After the steam sterilization drying time is up, the steam generator stops working, the evacuating motor acts to exhaust the internal steam, and the compressor acts to blow in clean compressed air to reduce the temperature in the dishwasher; so that the temperature of the surface of the tableware is lowered to a proper range.
Above-mentioned device is in the use, produced high-temperature steam by steam generator behind the steam gas receiver, become the high-temperature steam after the pressurization, and then the temperature of steam is also than before the pressurization will be high, the motor is managed to find time in the cooperation like this, make the steam temperature that the drying stage got into the inner bag be greater than 100 degrees, reach high temperature drying and sterile purpose, and then motor and compressor are managed to find time in the cooperation again, take hot air out in the inner bag, pour into clean cold air into, realize quick cooling. Above-mentioned mode compares current drying technology, can realize the drying of inner bag wall, shelf etc. has avoided the comdenstion water to remain the problem, and high temperature disinfection can reach medical grade's 121 degrees simultaneously, and clean health, and the disinfection effect is showing.
The embodiment of the utility model also provides a dishwasher, as shown in fig. 3, the dishwasher comprises the steam drying and sterilizing device 8 and a dishwasher body 9; the dishwasher body comprises a preset space which can be communicated with a steam storage chamber of the steam drying and sterilizing device.
The dishwasher provided by the embodiment of the utility model has the same technical characteristics as the steam drying and sterilizing device provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The steam drying and sterilizing device, the steam drying and sterilizing method and the computer program product of the dishwasher provided by the embodiments of the present invention include a computer readable storage medium storing program codes, wherein the program codes include instructions for executing the methods described in the foregoing method embodiments, and specific implementation can refer to the method embodiments, and will not be described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A steam drying and sterilizing device is characterized by comprising a steam generator, a steam storage chamber, a temperature sensor, a pressure sensor and a controller; the steam generator is communicated with the steam storage chamber; the controller is respectively connected with the steam generator, the steam storage chamber, the temperature sensor and the pressure sensor;
the controller is used for controlling the steam generator to generate steam after acquiring a starting instruction, and the steam enters the steam storage chamber;
the temperature sensor is used for detecting the temperature of the steam in the steam air storage chamber;
the pressure sensor is used for detecting the pressure of the steam in the steam air storage chamber;
the controller is used for controlling the steam air storage chamber to be communicated with the preset space when the temperature and the pressure of the steam in the steam air storage chamber meet preset first conditions, so that the steam in the steam air storage chamber enters the preset space, and the cleaned objects in the preset space are dried and sterilized.
2. The apparatus of claim 1, wherein the controller is further configured to control the steam generator to stop generating steam when the temperature of the steam reservoir and the pressure of the steam reservoir satisfy a preset first condition;
the controller is also used for controlling the steam generator to generate steam when the temperature of the steam gas storage chamber and the pressure of the steam gas storage chamber meet a preset second condition.
3. The apparatus of claim 1, further comprising an evacuation motor; the evacuation motor is connected with the controller; the evacuation motor is communicated with the preset space;
the controller is further used for controlling the evacuation motor to extract air in the preset space after the starting instruction is obtained.
4. The apparatus of claim 3, wherein the controller is further configured to control the evacuation motor to stop operating when the air pressure in the predetermined space is less than or equal to a first predetermined pressure, and control the evacuation motor to evacuate air from the predetermined space after a first predetermined time after the evacuation motor stops operating and when the number of operations of the evacuation motor is less than a predetermined number.
5. The apparatus of claim 4, wherein the controller is further configured to control the steam generator to stop generating steam and the steam storage chamber to stop communicating with the predetermined space after the evacuation motor is operated for a predetermined number of times and a second predetermined time period after the evacuation motor stops operating.
6. The apparatus of claim 3, further comprising a compressor; the controller is further used for controlling the steam storage chamber to be communicated with the preset space after the preset time of the starting instruction is obtained, controlling the evacuation motor to extract air in the preset space, and controlling the compressor to blow in clean air into the preset space.
7. The apparatus of claim 6, wherein the compressor comprises an air filtration device; and the compressor blows clean air into the preset space through the air filtering device.
8. The apparatus of claim 1, wherein the steam generator has a center of gravity lower than a center of gravity of the steam reservoir.
9. The device as claimed in claim 1, characterized in that the outer wall of the steam reservoir is provided with a valve; the controller controls the steam air storage chamber to be communicated with a preset space by controlling the valve to be opened.
10. A dishwasher, comprising the steam drying and sterilizing apparatus of any one of claims 1 to 9 and a dishwasher body; the dishwasher body comprises a preset space communicated with a steam storage chamber of the steam drying and sterilizing device.
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| CN202122946509.3U CN216984835U (en) | 2021-11-26 | 2021-11-26 | Steam drying and sterilizing device and dish washing machine |
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| CN202122946509.3U CN216984835U (en) | 2021-11-26 | 2021-11-26 | Steam drying and sterilizing device and dish washing machine |
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| CN216984835U true CN216984835U (en) | 2022-07-19 |
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