CN112296015A - Dry type cleaning device - Google Patents
Dry type cleaning device Download PDFInfo
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- CN112296015A CN112296015A CN201910694873.XA CN201910694873A CN112296015A CN 112296015 A CN112296015 A CN 112296015A CN 201910694873 A CN201910694873 A CN 201910694873A CN 112296015 A CN112296015 A CN 112296015A
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- cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
Abstract
The invention provides a dry cleaning device, comprising: a cleaning tank (11) which contains a cleaning medium (A) therein and has an opening, and in which a cleaning object (M) is disposed at the opening (O); a gas supply unit (2) which supplies gas into the cleaning tank (11) to scatter the cleaning medium (A), and removes dirt by making the scattered cleaning medium (A) collide with the cleaning object (M); a control unit (4) that controls the gas supply of the gas supply unit (2); state detection means (5, 6) for detecting the closed state of the opening (O); when the state detection means (5, 6) detect that the opening (O) is not in the closed state, the control means (4) prohibits the gas supply means (2) from supplying gas. Thereby, leakage of the cleaning medium can be prevented in a simple manner.
Description
Technical Field
The present invention relates to a technique for removing dirt on an object to be cleaned, and more particularly, to a dry cleaning apparatus for removing dirt by scattering a cleaning medium and colliding the cleaning medium with the object to be cleaned.
Background
In recent years, in order to overcome the drawbacks of the conventional wet cleaning technique, thereby reducing the cost and the environmental load, a dry cleaning technique without using a solvent has been proposed.
As a specific application of such a dry cleaning technique, patent documents 1 and 2 propose a dry cleaning apparatus shown in fig. 9 in which a compressed gas is supplied into a cleaning tank 11 to scatter a cleaning medium a such as a resin sheet or a plate-like membrane, and the cleaning medium a collides with and polishes a cleaning object M at an opening O to wash off dirt on the cleaning object M. The dry type cleaning device can shorten the single cleaning time to within a few minutes, and greatly improves the cleaning efficiency. Moreover, the dry cleaning device does not need to use a solvent, and the cleaning medium A can be recycled, so that the cost and the environmental load are reduced.
Patent document 1: japanese patent No. 4531841
Patent document 2: japanese laid-open patent publication 2007-144395
However, if the dry cleaning apparatus described above supplies compressed gas into the cleaning tank when there is no cleaning target or the opening of the cleaning tank is not completely covered with the cleaning target, there is a problem that the cleaning medium leaks from the opening of the opening, which poses a safety hazard (fig. 10A and 10B).
In addition, in the case where the cleaning object itself has an opening, even if the opening is completely covered with the cleaning object, the cleaning medium may leak from the opening (fig. 10C).
Disclosure of Invention
The present invention has been made in view of the above-described problems, and an object thereof is to provide a dry cleaning apparatus capable of preventing a cleaning medium from leaking in a simple manner.
In order to achieve the above object, the present invention provides a dry cleaning apparatus including: a cleaning tank that contains a cleaning medium therein and has an opening, and a cleaning object is disposed in the opening; a gas supply unit that supplies a gas into the cleaning tank to scatter the cleaning medium and causes the scattered cleaning medium to collide with the cleaning object to remove dirt; a control unit that controls gas supply of the gas supply unit; the dry cleaning apparatus further includes a state detection unit that detects a closed state of the opening, and the control unit prohibits the gas supply unit from supplying the gas when the state detection unit detects that the opening is not in the closed state.
According to the present invention, since the gas supply unit is allowed to supply the gas only when the opening of the cleaning tank is in the closed state in which the cleaning object is completely covered, a situation in which "the compressed gas is supplied into the cleaning tank without the cleaning object being present or the opening of the cleaning tank not being completely covered with the cleaning object" does not occur, and the leakage of the cleaning medium can be prevented in a simple manner.
Here, the phrase "the opening of the cleaning tank is completely covered with the cleaning object" means that the edge of the opening of the cleaning tank is completely covered with the cleaning object and has no gap opened to the outside.
Preferably, the state detection unit has a position detection portion that detects a relative position of the cleaning object and the opening to detect a closed state of the opening.
According to this aspect, the closed state of the opening of the cleaning tank can be detected by the simple structure of the position detection unit, and the overall structure of the dry cleaning apparatus can be made relatively simple. Further, the position detection unit can ensure that the cleaning is performed in a state where the opening of the cleaning tank is completely covered with the cleaning object, and can prevent the cleaning medium from leaking from the edge of the opening, thereby ensuring the cleaning effect.
Preferably, the position detection unit is a position sensor provided in each of the openings to detect the presence of the cleaning object, and detects that the opening is in the closed state when a position sensor on a downstream side in a moving direction of the cleaning object among the position sensors detects the presence of the cleaning object. Alternatively, the opening may be substantially rectangular, the position detection unit may include four position sensors provided near four corners of the opening, respectively, for detecting the presence of the cleaning object, and the opening may be detected to be closed when the four position sensors simultaneously detect the presence of the cleaning object.
According to this aspect, the position detection unit can be realized with a simple configuration.
Preferably, the state detection unit has an airtight detection section that detects an airtight state of the cleaning tank to detect a closed state of the opening.
Generally, the position detection unit can only detect whether the cleaning object is completely opposite to the opening of the cleaning tank, that is, only whether a gap exists between the edge of the cleaning object and the edge of the opening. However, as described above, the cleaning object itself may have an opening, and the position detection unit cannot detect such an opening. Therefore, if it is decided whether or not to allow the gas supply unit to supply the gas based on only the detection result of the position detection portion, the cleaning medium may still leak from the opening in the case where the opening is large.
According to this aspect, the closed state of the opening is determined based on the airtight state of the cleaning tank, and the opening is considered to be closed only when the airtight state of the cleaning tank reaches a predetermined state set in advance. Therefore, even if the cleaning object itself has an opening, the cleaning object itself can be detected, and the operator can be reminded to close the opening with a lid or the like and then clean the opening. This can more reliably prevent the cleaning medium from leaking.
Preferably, the dry cleaning apparatus further includes a dirt collection unit configured to collect dirt by sucking gas from inside the cleaning tank, and the air-tightness detection unit includes a negative pressure sensor configured to detect a negative pressure inside the cleaning tank when the dirt collection unit is operated and the gas supply unit is not operated, and to detect that the opening is in a closed state when the negative pressure is equal to or greater than a predetermined negative pressure threshold value.
According to this aspect, the state of the opening can be accurately detected with a simple configuration.
Preferably, the negative pressure sensor is provided at a position higher than the cleaning medium that is left standing in the cleaning tank. More preferably, the opening is located at an upper portion of the cleaning tank, and the negative pressure sensor is provided at a position slightly lower than the opening in the cleaning tank.
In principle, the negative pressure sensor may be disposed at any position in the cleaning tank. However, if the negative pressure sensor is provided at a low position, the apparent negative pressure of the negative pressure sensor may increase due to the influence of the cleaning medium when a large amount of the cleaning medium is introduced into the cleaning tank. In this way, even when the cleaning object and the opening are not completely opposed to each other, the detection value of the negative pressure sensor may become equal to or higher than the threshold value, and the state of the opening at that time is likely to be erroneously detected as the closed state.
According to this aspect, since the negative pressure sensor is provided at a position not affected by the cleaning medium, erroneous detection by the negative pressure sensor can be prevented, and leakage of the cleaning medium can be more reliably prevented.
Preferably, the dry cleaning apparatus further includes a dirt collection unit configured to collect dirt by sucking gas from inside the cleaning tank, and the air-tightness detection unit includes a flow sensor configured to detect a flow rate of gas drawn out from the cleaning tank when the dirt collection unit is operated and the gas supply unit is not operated, and to detect that the opening is in a closed state when the flow rate is equal to or less than a predetermined flow rate threshold value.
According to this aspect, by converting the threshold value of the airtightness to the threshold value of the flow rate of the suction gas and comparing the detection value of the flow rate sensor with the threshold value of the flow rate, it is possible to determine whether or not the opening is in the closed state. Thus, the state of the opening can be accurately detected by a simple structure.
Drawings
Fig. 1 is a schematic diagram showing a configuration of a dry cleaning apparatus according to embodiment 1 of the present invention.
Fig. 2A and 2B are a plan view and a front view showing the principle of the position detection unit of the dry cleaning apparatus, and show a state in which the cleaning target is at the initial position.
Fig. 3A and 3B are a plan view and a front view showing the principle of the position detection unit of the dry cleaning apparatus, and show a state where the cleaning target is at the cleaning start position.
Fig. 4A and 4B are a plan view and a front view showing the principle of the position detection unit of the dry cleaning apparatus, and show a state where the cleaning target is at the cleaning completion position.
Fig. 5 is a schematic diagram showing the configuration of a dry cleaning apparatus according to embodiment 2 of the present invention.
Fig. 6 is a diagram showing a relationship between the airtightness (airtight state) of the cleaning tank and the flow rate of the gas extracted from the cleaning tank when the dirt collection unit is operated and the gas supply unit is not operated.
Fig. 7 is a schematic diagram showing the principle of the position detection unit according to embodiment 3 of the present invention.
Fig. 8 is a schematic diagram showing the installation position of the negative pressure sensor according to embodiment 4 of the present invention.
Fig. 9 is a schematic view showing the principle of a conventional dry cleaning apparatus.
Fig. 10A to 10C are schematic diagrams showing a problem of leakage of the cleaning medium in the conventional dry cleaning apparatus.
Description of the reference numerals
1 cleaning tank unit
11 rinse tank
111 outer casing
112: cleaning tank body
12 moving mechanism
2 gas supply unit
21 gas compressor
22 gas supply pipe
23 valve
24 nozzle
3 dirt recovery unit
31 gas suction pipe
32 dust collector
4 control unit
5 position detecting part
51 first position sensor
52 second position sensor
51' first position sensor
52' second position sensor
53' third position sensor
54' fourth position sensor
6 negative pressure sensor
7 flow sensor
8 support
A cleaning Medium
M cleaning object
O opening
Detailed Description
Hereinafter, embodiments of the present invention will be described.
< embodiment 1>
Fig. 1 is a schematic diagram showing a configuration of a dry cleaning apparatus according to embodiment 1 of the present invention.
As shown in fig. 1, the dry cleaning apparatus of the present embodiment mainly includes a cleaning tank unit 1, a gas supply unit 2, a dirt collection unit 3, and a control unit 4.
The cleaning tank unit 1 has a cleaning tank 11 and a moving mechanism 12.
The cleaning tank 11 has an outer casing 111 and an inner cleaning tank body 112. The housing 111 is a trough-like member, and may be formed in a known horizontal semi-cylindrical shape, a horizontal prism shape, or the like. The housing 111 has a communication port communicating with the gas supply unit 2 and a communication pipe communicating with the dirt collection unit 3 at a lower portion. The cleaning tank body 112 is a trough-like member formed of a porous member and accommodating the cleaning medium a therein. As the cleaning medium a, a medium having a hard texture and high impact resistance is generally used. For example, a material such as polycarbonate or PET may be processed into a square sheet having a thickness of 0.1 to 0.2mm and a side length of 5 to 10mm as the cleaning medium A. Of course, the material, size, shape, and the like of the cleaning medium a are not limited thereto, and various cleaning media known in the art may be used. Cleaning tank 11 has a substantially rectangular opening O at the upper portion. The cleaning object M is disposed at the opening O in such a manner that the surface to be cleaned faces the opening O at the time of cleaning.
The moving mechanism 12 is provided above the cleaning tank 11, and moves the cleaning object M so that the entire surface to be cleaned (lower surface in the drawing) of the cleaning object M passes through the opening O.
The gas supply unit 2 includes a gas compressor 21 for supplying compressed gas, a gas supply pipe 22 having one end connected to the gas compressor 21, a valve 23 for opening and closing the gas supply pipe 22, and a nozzle 24 provided in the communication port of the housing 111 and connected to the other end of the gas supply pipe 22. The valve 23 is turned on and off under the control of the control unit 4, allows the compressed gas of the gas compressor 21 to enter the cleaning tank 11 via the gas supply pipe 22 and the nozzle 24 when turned on, and prohibits the compressed gas of the gas compressor 21 from passing through the gas supply pipe 22 when turned off, thereby preventing the gas from entering the cleaning tank 11.
The dirt collection unit 3 has a gas suction pipe 31 having one end connected to the communication pipe of the housing 111 and a dust collector 32 connected to the other end of the gas suction pipe 31, and collects dirt washed off from the cleaning object M by sucking gas from the cleaning tank 11 by the dust collector 32.
The control unit 4 is constituted by a microcomputer, receives an instruction input from an operation panel by an operator, receives signals from a position detection unit 5 and an air-tightness detection unit (see reference numeral "6") described later, determines a closed state of the opening O of the cleaning tank 11 based on the received signals, and controls operations of the cleaning tank unit 1, the gas supply unit 2, and the dirt recovery unit 3 based on the determination result.
As described above, if the compressed gas is supplied into the cleaning tank in a state where there is no cleaning object at the opening of the cleaning tank or the opening of the cleaning tank is not completely covered with the cleaning object, there is a problem that the cleaning medium leaks from the opening. In addition, in the case where the cleaning object itself has an opening, even if the opening is completely covered with the cleaning object, the cleaning medium may leak from the opening.
To solve this problem, the dry cleaning apparatus of the present embodiment further includes a state detection unit that detects a closed state of the opening O of the cleaning tank 11. Specifically, as shown in fig. 1, position detection section 5 for detecting the closed state of opening O of cleaning tank 11 by detecting the relative position of cleaning object M and opening O of cleaning tank 11 and an airtight detection section (see reference numeral "6") for detecting the airtight state of cleaning tank 11 to detect the closed state of opening O of cleaning tank 11 are provided, and position detection section 5 and the airtight detection section (see reference numeral "6") constitute a state detection unit.
Referring to fig. 2A to 4B, position detecting unit 5 includes first position sensor 51 and second position sensor 52 provided at diagonal positions of opening O of cleaning tank 11 to detect the presence of cleaning object M. The first position sensor 51 is provided at a corner portion of a position relatively downstream of the opening O in the moving direction of the cleaning object M (see an outlined arrow in fig. 2A, 3A, 4A), and the second position sensor 52 is provided at a corner portion of a position relatively upstream of the opening O in the moving direction of the cleaning object M. The first position sensor 51 and the second position sensor 52 are connected to the control unit 4, respectively, and can transmit respective trigger signals to the control unit 4.
Before cleaning, as shown in fig. 2A, 3A, and 4A, a first trigger lever r1 and a second trigger lever r2 are provided at diagonal positions of the cleaning object M in advance, the first trigger lever r1 is provided at a corner portion of a relatively downstream position of the cleaning object M in the moving direction of the cleaning object M corresponding to the first position sensor 51, and the second trigger lever r2 is provided at a corner portion of a relatively upstream position of the cleaning object M in the moving direction of the cleaning object M corresponding to the second position sensor 52.
As shown in fig. 2A, when the cleaning object M is located at the initial position where the first trigger lever r1 is not in contact with the first position sensor 51 and the second trigger lever r2 is not in contact with the second position sensor 52, both the first position sensor 51 and the second position sensor 52 are in the non-triggered state. The control unit 4 determines that the opening O of the cleaning tank 11 is not completely covered with the cleaning object M and is not in the closed state based on the signal indicating that both the first position sensor 51 and the second position sensor 52 are in the non-activated state, and therefore the valve 23 is shut off and the gas supply unit 2 is prohibited from supplying gas into the cleaning tank 11. At this time, as shown in fig. 2B, cleaning medium a is left standing in cleaning tank 11 without leaking from opening O.
As shown in fig. 3A, when the cleaning object M moves in the above-described moving direction to a position where the first trigger lever r1 contacts the first position sensor 51, the first trigger lever r1 triggers the first position sensor 51. The control unit 4 determines that the opening O is completely covered with the cleaning object M and is in the closed state based on the trigger signal of the first position sensor 51, and turns on the valve 23 to allow the compressed gas to enter the cleaning tank 11. At this time, as shown in fig. 3B, the cleaning medium a flows at a high speed in the cleaning tank 11 with the high-pressure air flow, and is cleaned by collision and polishing with the cleaning object M.
As shown in fig. 4A and 4B, when the cleaning object M further moves to a position where the first trigger lever r1 is not in contact with the first position sensor 51 and the second trigger lever r2 is in contact with the second position sensor 52, the second trigger lever r2 triggers the second position sensor 52. The control unit 4 determines that the entire surface to be cleaned of the cleaning object M has been cleaned based on the trigger signal of the second position sensor 52, and therefore cuts off the valve 23 to prohibit the gas supply unit 2 from supplying gas into the cleaning tank 11.
The airtightness detection unit includes a negative pressure sensor 6. As shown in fig. 1, the negative pressure sensor 6 is disposed between the casing 111 and the wash bowl body 112 in the wash bowl 11. More specifically, it is disposed in the housing 111 in the vicinity of the inlet of the aforementioned communicating pipe connected to the dirt recovery unit 3. Negative pressure sensor 6 detects the negative pressure in cleaning tank 11 to detect the airtight state of cleaning tank 11.
The negative pressure that can be formed in the cleaning tank 11 varies depending on the degree of closing of the opening O, and the more the opening O is closed, the higher the negative pressure that can be formed in the cleaning tank 11 is, and vice versa. Therefore, the negative pressure that can be formed in the cleaning tank 11 can reflect the airtight state of the cleaning tank 11.
In the present embodiment, a predetermined negative pressure threshold value indicating that cleaning tank 11 is in a required airtight state is set in advance. Before supplying the compressed gas into the cleaning tank 11, the control unit 4 operates the dirt collection unit 3 to create a negative pressure environment in the cleaning tank 11, and detects the negative pressure in the cleaning tank 11 by the negative pressure sensor 6. When the negative pressure detection value of negative pressure sensor 6 is equal to or greater than the negative pressure threshold value, it indicates that washing tub 11 is in a required airtight state, and opening O is considered to be in a closed state. At this time, the control unit 4 turns on the valve 23 to allow the compressed gas to enter the cleaning tank 11. Conversely, when the negative pressure detection value is smaller than the negative pressure threshold value, the opening O is considered not to be in the closed state. At this time, the control unit 4 blocks the valve 23 to prohibit the gas supply unit 2 from supplying gas into the cleaning tank 11.
In this way, negative pressure sensor 6 can detect the airtight state of cleaning tank 11 by detecting the negative pressure in cleaning tank 11, and further detect the closed state of opening O.
According to the present embodiment, since the state detection means for detecting the closed state of the opening O of the cleaning tank 11 is provided, and the gas supply means 2 is allowed to supply the gas only when the opening O of the cleaning tank 11 is in the closed state completely covered with the cleaning object M, there is no situation of "supplying the compressed gas into the cleaning tank without the cleaning object or the opening of the cleaning tank being completely covered with the cleaning object", and the leakage of the cleaning medium a can be prevented in a simple manner.
Further, the position detection unit 5 can ensure that the cleaning is performed in a state where the opening O is completely covered with the cleaning object M, and can prevent the cleaning medium a from leaking from a gap between the edge of the opening O and the cleaning object M at the edge, thereby ensuring the cleaning effect.
Further, since the state detection means is provided with an air-tightness detection unit (see reference numeral "6") in addition to the position detection unit 5, even if the cleaning object M itself has an opening, the air-tightness detection unit can detect the opening, and thus the operator can be reminded to close the opening with a lid or the like and then clean the opening. This can more reliably prevent the cleaning medium a from leaking.
< embodiment 2>
Since the present embodiment differs from embodiment 1 only in the form of the airtightness detection unit, only the form of the airtightness detection unit of the present embodiment will be described.
As shown in fig. 5, in the present embodiment, a flow rate sensor 7 is provided as an airtightness detection unit in place of the negative pressure sensor 6 of embodiment 1. The flow sensor 7 is provided in a pipeline between the cleaning tank 11 and the dirt recovery unit 3. More specifically, the aforementioned communication pipe connected to the dirt recovery unit 3 is provided in the housing 111. Flow sensor 7 detects the airtight state of cleaning tank 11 by detecting the exhaust flow rate of cleaning tank 11 (i.e., the flow rate of the gas extracted from cleaning tank 11).
When the dirt collection unit 3 is operated and the gas supply unit 2 is not operated, there is a correlation between the flow rate of the gas extractable from the cleaning tank 11 and the airtight state of the cleaning tank 11, and fig. 6 shows such a relationship. As shown in fig. 6, the greater the flow rate of the gas that can be extracted from cleaning tank 11 (vertical axis: exhaust flow rate), the worse the airtight state of cleaning tank 11 (horizontal axis: airtightness). Conversely, the smaller the flow rate of the gas that can be extracted from cleaning tank 11, the better the airtight state of cleaning tank 11.
In the present embodiment, a predetermined flow rate threshold value of the gas extracted from the cleaning tank 11 when the dirt collection unit 3 is operated and the gas supply unit 2 is not operated is set in advance in accordance with the airtightness threshold value of the cleaning tank 11. Before supplying the compressed gas into the cleaning tank 11, the control unit 4 operates the dirt collection unit 3 to suck the gas from the cleaning tank 11, and detects the flow rate of the gas drawn out from the cleaning tank 11 by the flow rate sensor 7. When the flow rate detection value of flow rate sensor 7 is equal to or less than the flow rate threshold value, cleaning tank 11 is in an airtight state satisfying the requirement, and opening O is considered to be in a closed state. At this time, the control unit 4 turns on the valve 23 to allow the compressed gas to enter the cleaning tank 11. Conversely, when the flow rate detection value is greater than the flow rate threshold value, the opening O is considered not to be in the closed state. At this time, the control unit 4 blocks the valve 23 to prohibit the gas supply unit 2 from supplying gas into the cleaning tank 11.
In this way, flow sensor 7 can detect the airtight state of cleaning tank 11 by detecting the exhaust flow rate of cleaning tank 11, and further detect the closed state of opening O.
According to the present embodiment, substantially the same technical effects as those of embodiment 1 can be achieved.
< embodiment 3>
Since the present embodiment differs from embodiment 1 only in the configuration of the position detection unit 5, only the configuration of the position detection unit 5 of the present embodiment will be described.
As shown in fig. 7, position detecting unit 5 is provided with first position sensor 51 ', second position sensor 52', third position sensor 53 ', and fourth position sensor 54' for detecting the presence of cleaning target M, respectively, around opening O of cleaning tank 11. More specifically, first position sensor 51 ', second position sensor 52', third position sensor 53 ', and fourth position sensor 54' are provided near the four corners of opening O of washing tub 11, and are connected to control unit 4.
When the cleaning object M simultaneously comes into contact with the first to fourth position sensors 51 'to 54' to trigger the four switches, the control unit 4 judges that the opening O has been completely covered with the cleaning object M and is in a closed state based on their trigger signals. At this point, the control unit 4 opens the valve 23, allowing the compressed gas to enter the cleaning tank 11. When any of the first to fourth position sensors 51 'to 54' does not contact the cleaning object M, the control unit 4 determines that the opening O is not completely covered with the cleaning object M. At this time, the control unit 4 turns off the valve 23 to prohibit the compressed gas from entering the cleaning tank 11.
According to the present embodiment, substantially the same technical effects as those of embodiment 1 can be achieved.
< embodiment 4>
Since the present embodiment differs from embodiment 1 only in the installation position of the negative pressure sensor 6, only the installation position of the negative pressure sensor 6 will be described.
As shown in fig. 8, a holder 8 is provided between the casing 111 and the cleaning tank main body 112 at a position slightly below the opening O, and the negative pressure sensor 6 is supported by the holder 8. In this way, negative pressure sensor 6 is provided in cleaning tank 11 at a position higher than cleaning medium a that is standing still.
In principle, the negative pressure sensor may be disposed at any position in the cleaning tank. However, if the negative pressure sensor is provided at a low position, the apparent negative pressure of the negative pressure sensor may increase due to the influence of the cleaning medium when a large amount of the cleaning medium is introduced into the cleaning tank. In this way, even when the cleaning object and the opening are not completely opposed to each other, the detection value of the negative pressure sensor may become equal to or higher than the threshold value, and the state of the opening at that time is likely to be erroneously detected as the closed state.
According to the present embodiment, since the negative pressure sensor is provided at a position not affected by the cleaning medium, erroneous detection by the negative pressure sensor can be prevented, and leakage of the cleaning medium can be more reliably prevented.
< modification >
Several embodiments of the present invention have been described above, but the present invention is not limited to these embodiments. The embodiments may be combined with each other or components may be added, omitted, replaced, or otherwise modified without departing from the spirit of the present invention.
For example, in embodiments 1 to 4, the position detection unit and the air-tightness detection unit are provided together as the state detection means for detecting the closed state of the opening of the cleaning tank, but only one of them, for example, only the position detection unit or only the air-tightness detection unit may be provided.
As another example, in embodiments 1 to 4, the airtightness detection unit is provided with a negative pressure sensor or a flow rate sensor, but both of them may be provided.
For example, in embodiment 4, the negative pressure sensor is provided in the cleaning tank at a position slightly below the opening. However, the position where the negative pressure sensor is disposed is not limited to this. The negative pressure sensor may be provided at any position within the cleaning tank, below the opening of the cleaning tank, and above the upper surface of the cleaning medium that is standing still, as long as it is provided at a position higher than the cleaning medium that is standing still.
Claims (9)
1. A dry cleaning device is provided with:
a cleaning tank that contains a cleaning medium therein and has an opening, and a cleaning object is disposed in the opening;
a gas supply unit that supplies a gas into the cleaning tank to scatter the cleaning medium and causes the scattered cleaning medium to collide with the cleaning object to remove dirt;
a control unit that controls gas supply of the gas supply unit;
it is characterized in that the preparation method is characterized in that,
the dry cleaning apparatus further includes a state detection unit that detects a closed state of the opening,
the control unit prohibits the gas supply unit from supplying the gas when the state detection unit detects that the opening is not in the closed state.
2. Dry cleaning apparatus as claimed in claim 1,
the state detection unit has a position detection unit that detects a relative position of the opening and the cleaning object, thereby detecting a closed state of the opening.
3. Dry cleaning apparatus as claimed in claim 2,
the position detecting portions are position sensors provided at the openings, respectively, for detecting the presence of the cleaning object,
when the position sensor on the downstream side in the moving direction of the cleaning object detects the presence of the cleaning object, the position sensor detects that the opening is in a closed state.
4. Dry cleaning apparatus as claimed in claim 2,
the opening is of a substantially rectangular shape,
the position detecting unit includes four position sensors provided near four corners of the opening, respectively, for detecting the presence of the cleaning object,
when the four position sensors simultaneously detect that the cleaning object exists, the opening is detected to be in a closed state.
5. Dry cleaning apparatus as claimed in any one of claims 1 to 4,
the state detection unit has an airtight detection section for detecting an airtight state of the cleaning tank to detect a closed state of the opening.
6. Dry cleaning apparatus as claimed in claim 5,
the dry cleaning apparatus further has a dirt recovery unit that sucks gas from within the cleaning tank to recover dirt,
the air tightness detection unit includes a negative pressure sensor that detects a negative pressure in the cleaning tank when the dirt collection unit is operated and the gas supply unit is not operated, and detects that the opening is in a closed state when the negative pressure is equal to or greater than a predetermined negative pressure threshold value.
7. Dry cleaning apparatus as claimed in claim 6,
the negative pressure sensor is provided at a position higher than the cleaning medium that is left standing in the cleaning tank.
8. Dry cleaning apparatus as claimed in claim 7,
the opening is positioned at the upper part of the cleaning tank,
the negative pressure sensor is provided in the cleaning tank at a position slightly lower than the opening.
9. Dry cleaning apparatus as claimed in claim 5,
the dry cleaning apparatus further has a dirt recovery unit that sucks gas from within the cleaning tank to recover dirt,
the air-tightness detecting unit includes a flow sensor that detects a flow rate of the gas extracted from the cleaning tank when the dirt collecting unit is operated and the gas supplying unit is not operated, and detects that the opening is in a closed state when the flow rate is equal to or less than a predetermined flow rate threshold value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910694873.XA CN112296015B (en) | 2019-07-30 | 2019-07-30 | Dry type cleaning device |
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|---|---|---|---|
| CN201910694873.XA CN112296015B (en) | 2019-07-30 | 2019-07-30 | Dry type cleaning device |
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| CN112296015A true CN112296015A (en) | 2021-02-02 |
| CN112296015B CN112296015B (en) | 2023-03-07 |
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| CN208968768U (en) * | 2018-09-20 | 2019-06-11 | 苏州八九昱昊材料科技有限公司 | A kind of breather valve air-tightness tester |
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| CN103837312A (en) * | 2012-11-22 | 2014-06-04 | 赛龙通信技术（深圳）有限公司 | Airtightness automatic test system and test method |
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| CN106076972A (en) * | 2016-06-29 | 2016-11-09 | 浙江德福精密驱动制造有限公司 | A kind of bits blower for three pin shaft forks |
| CN208968768U (en) * | 2018-09-20 | 2019-06-11 | 苏州八九昱昊材料科技有限公司 | A kind of breather valve air-tightness tester |
| CN109692846A (en) * | 2018-12-29 | 2019-04-30 | 深圳市富诺依科技有限公司 | A kind of dry cleaning device |
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