CN111286915B - Portable ultrasonic cavitation cleaner - Google Patents
Portable ultrasonic cavitation cleaner Download PDFInfo
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- CN111286915B CN111286915B CN202010114166.1A CN202010114166A CN111286915B CN 111286915 B CN111286915 B CN 111286915B CN 202010114166 A CN202010114166 A CN 202010114166A CN 111286915 B CN111286915 B CN 111286915B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F19/00—Washing machines using vibrations for washing purposes
Abstract
The invention relates to the technical field of ultrasonic cleaning devices, and discloses a portable ultrasonic cavitation cleaner which comprises a vibration assembly and a locking assembly, wherein the vibration assembly comprises a shell provided with an opening accommodating cavity, a pre-tightening cover arranged on the opening and piezoelectric ceramics positioned at the cavity bottom of the accommodating cavity, an elastic reset device is arranged in the accommodating cavity, the bottom surface of the piezoelectric ceramics is abutted against the cavity bottom of the accommodating cavity, and the top surface of the piezoelectric ceramics abuts against the lower end surface of the elastic reset device; the one end of shell is equipped with the holding tank that is used for holding the article of waiting to wash, is equipped with the cavitation recess in the holding tank, and locking Assembly's top is equipped with the location arch, and the location arch forms the step face with locking Assembly, and the top surface butt of holding tank is on the step face. The portable ultrasonic cavitation cleaner can effectively remove stubborn stains, can treat local parts of clothes to avoid cleaning the whole clothes due to a little of stains, and can not damage the clothes on the premise of removing the stains.
Description
Technical Field
The invention relates to the technical field of ultrasonic cleaning devices, in particular to a portable ultrasonic cavitation cleaner.
Background
At present, for stains with strong clothes absorbability, such as red wine, coffee, soy sauce and the like, the traditional removal method is to use a manual repeated cleaning method or a washing machine to wash for multiple times after a large amount of washing materials are added, but the removal effect is not satisfactory, and stain marks are always remained; soil removal using powerful oxidants removes the soil but creates an undesirable and perceived overspray marking that oxidizes the laundry as well. Therefore, the stubborn stain removal on the clothes is always a fortress which is difficult to overcome in the field of washing machines and the field of washing materials.
The washing force of the traditional washing machine is derived from the power of macroscopic water flow generated by a washing drum or a pulsator stirring a water tank in the washing machine, the power can only separate large-particle dirt from formed fiber winding, and the corresponding force when the macroscopic force is decomposed into a microcosmic environment of the clothing fiber is far smaller than the intermolecular force between particles and fiber bifurcations, so that the washing machine cannot be used for removing small-particle intractable stains; meanwhile, the traditional washing materials mainly focus on the works of electrostatic polarity conversion, secondary pollution prevention during washing, biological enzyme removal of biological lipid and the like.
Along with the increasing quality of life of people and the frequent social activities, the probability that the clothes are contacted with stubborn stains is increased; meanwhile, the concept of green environmental protection is increasingly deep, the whole piece of clothes is eliminated by some intractable stains on the clothes, which is difficult to be cut, but the certain stains can generate social unconsciousness and bring psychological barriers to people. The problem of fundamentally solving the problem of removing the intractable stains on the clothes at low cost and high quality is to mention the problem which needs to be solved urgently in daily life.
However, strong clothes-adsorbing stains such as red wine, coffee, soy sauce, etc. belong to a mode in which small particles are adsorbed and entangled. The common features of these particles are: the particle size is small, and the diameter is generally in the nanometer scale; the polymer is uniformly distributed in the parent liquid without agglomeration; the specific gravity of the mother liquid is larger; typically with a polarity or static charge. Once the particles meet the multi-fiber multi-branched structure of the clothes, or through polar adsorption or electrostatic adsorption, and the liquid environment of the parent liquid reduces the energy required by solid friction, the distance between the particles and the fiber branches is drawn to be within the acting distance of intermolecular force, and the winding effect of the clothes fibers makes the particle and the fiber branches difficult to realize physical separation.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the particulate matter which is convenient to carry and can remove intermolecular adsorption force with clothes fibers in a liquid environment is provided, and the macroscopic representation of the particulate matter is macroscopic stains such as: cleaning device for particulate matters in red wine, coffee and soy sauce.
In order to solve the problems, the invention provides a portable ultrasonic cavitation cleaner which comprises a vibration assembly and a locking assembly for locking an article to be cleaned, wherein the vibration assembly comprises a shell provided with an opening accommodating cavity, a pre-tightening cover arranged on the opening and piezoelectric ceramics positioned at the cavity bottom of the accommodating cavity, an elastic resetting device is arranged in the accommodating cavity, the bottom surface of the piezoelectric ceramics is abutted against the cavity bottom of the accommodating cavity, and the top surface of the piezoelectric ceramics is abutted against the lower end surface of the elastic resetting device; the shell is kept away from open-ended one end is equipped with the holding tank that is used for holding the article of treating washing, be equipped with the cavitation recess that is used for holding cavitation liquid in the holding tank, locking Assembly's top be equipped with holding tank assorted location is protruding, the location protruding with locking Assembly forms the step face, the top surface butt of holding tank is in on the step face.
Preferably, the locking assembly comprises a base and a heating device arranged on the top of the base, and the upper surface of the heating device protrudes out of the top surface of the base.
Preferably, the heating device comprises a heat conduction plate arranged on the base and a resistance wire positioned at the bottom of the heat conduction plate, and the shape of the heat conduction plate is matched with that of the accommodating groove.
Preferably, a heat preservation cover is arranged between the bottom of the resistance wire and the base.
Preferably, the base is provided with a positioning groove, the heat-insulating cover is arranged in the positioning groove, and the heat-conducting plate protrudes out of the upper surface of the base.
Preferably, the piezoelectric ceramic vibration device further comprises a vibration controller, the vibration controller is arranged in the accommodating cavity, and the vibration controller is electrically connected with the piezoelectric ceramic.
Preferably, the heating device further comprises a heating controller, and the heating controller is electrically connected with the resistance wire.
Preferably, one end of the compression spring is abutted with the vibration controller, and the other end of the vibration controller is abutted with the pre-tightening cover.
Preferably, the base is provided with an open slot for accommodating the heating controller, the heating controller is arranged in the open slot, and a pressing cover is arranged on the slot opening of the open slot.
Preferably, the accommodating cavity, the accommodating groove and the heating device are all coaxially arranged.
Compared with the prior art, the portable ultrasonic cavitation cleaner provided by the embodiment of the invention has the beneficial effects that:
according to the portable ultrasonic cavitation cleaner disclosed by the embodiment of the invention, the cavitation groove is filled with the cavitation liquid, the local stain of the object to be cleaned is placed between the cavitation groove and the locking assembly, and the local stain is in the cavitation cavity filled with the cavitation liquid through the matching between the accommodating groove and the locking assembly. Make in the clothing that is washd is in the closed cavity that forms between the bellied upper surface in location of cavitation recess and locking Assembly, ultrasonic shock wave (ultrasonic vibration energy) all take place inside its cavity with ultrasonic cavitation, will treat from this that the washing article is clean, simultaneously, vibration subassembly and locking Assembly can dismantle the connection, and portable from this can in time carry out quick effectual cleanness to the local spot on the clothing under the circumstances such as business turn over.
Drawings
FIG. 1 is a schematic structural diagram of a portable ultrasonic cavitation cleaner in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a vibration assembly according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a locking assembly in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural view of a heating apparatus according to an embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 1 at I;
FIG. 6 is a schematic view of a stain on an article to be cleaned according to an embodiment of the present invention;
FIG. 7 is a schematic view of a vibration mode of a piezoelectric ceramic;
in the figure: 1. the device comprises a pre-tightening cover, 2, a shell, 201, a cavitation groove, 202, a containing groove, 3, a spring, 4, a vibration controller, 5, piezoelectric ceramics, 6, a heat conducting plate, 7, a heat preservation cover, 8, a resistance wire, 9, a heating controller, 10, a base, 11, a pressing cover, 12, a power plug, 13, cavitation liquid, 14, an object to be cleaned, 1401, stains, 15, an insulating coating, 16, a vibration component, 17, a locking component, 18 and a heating device.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
In the description of the present invention, it should be understood that the terms "ultrasonic shock wave", "ultrasonic cavitation" and "cavitation liquid" are used herein in the following meanings, respectively:
1. ultrasonic shock waves (ultrasonic vibration energy) refer to the fact that when waves propagate in a liquid medium, one wave is compressed and the other wave is stretched along the propagation direction, the compression and stretching are reversed in the next period, and if the driving frequency is at the ultrasonic frequency or higher, the compression and stretching range of the effect is possibly at the same scale as the multi-branching of particles and multi-fibers of clothes.
2. Ultrasonic cavitation refers to the dynamic process of growth and collapse when micro-gas core cavitation bubbles in liquid vibrate under the action of sound waves and sound pressure reaches a certain value. When ultrasonic wave acts on liquid, a large number of small bubbles with the same size as the multi-fiber multi-branch of particles and clothes can be generated. The reason is that:
(1) the local tensile stress in the liquid forms negative pressure, and the reduction of the pressure leads the gas originally dissolved in the liquid to be supersaturated and to escape from the liquid to become small bubbles;
(2) the strong tensile stress "tears" the liquid into a cavitation of a hollow. When the sound pressure threshold is reached, a kinetic process from growth, collapse and burst occurs, and this microscopic burst force reaches the same level of intermolecular forces between the particles and the multifibre multifibres of the garment.
3. Cavitation liquid refers to a viscous liquid with a cleaning and decontaminating effect, such as: laundry detergents, liquid soaps, and the like.
As shown in fig. 1 to 6, a portable ultrasonic cavitation cleaner according to a preferred embodiment of the present invention comprises a vibration component 16 and a locking component 17 for locking an article 14 to be cleaned, wherein the vibration component 16 comprises a housing 2 provided with an open accommodating cavity, a pre-tightening cover 1 arranged on the open, and a piezoelectric ceramic 5 located at the bottom of the accommodating cavity, an elastic resetting device is arranged in the accommodating cavity, the bottom surface of the piezoelectric ceramic 5 abuts against the bottom of the accommodating cavity, and the top surface of the piezoelectric ceramic 5 abuts against the lower end surface of the elastic resetting device; make elasticity resetting means warp through screwing up lid 1 in advance, compress tightly the cavitation controller and make piezoceramics 5 hug closely shell 2 under the effect of elasticity, shell 2 is kept away from open-ended one end and is equipped with the holding tank 202 that is used for holding article 14 of treating the washing, be equipped with the cavitation recess 201 that is used for holding cavitation liquid 13 in the holding tank 202, be equipped with the cavitation liquid 13 that is used for strengthening the cavitation in the cavitation recess 201, locking Assembly 17's top be equipped with holding tank 202 assorted location protruding, the location is protruding to form the step face with locking Assembly 17, the top surface butt of holding tank 202 is on the step face.
Based on the technical scheme, the cavitation groove 201 is filled with the cavitation liquid 13, the local stain 1401 of the object 14 to be cleaned is placed between the cavitation groove 201 and the locking assembly 17, and the local stain 1401 is in the cavitation cavity filled with the cavitation liquid 13 through the matching between the accommodating groove 202 and the locking assembly 17. The clothes to be cleaned are located in a closed cavity formed between the cavitation groove 201 and the upper surface of the positioning protrusion of the locking component 17, ultrasonic shock waves (ultrasonic vibration energy) and ultrasonic cavitation action are generated in the cavity, so that the objects 14 to be cleaned are cleaned, and meanwhile, the vibration component 16 and the locking component 17 are detachably connected, so that the cleaning machine is convenient to carry and can quickly and effectively clean local stains 1401 on the clothes in time under the conditions of business trip and the like.
Further, the locking assembly 17 includes a base 10 and a heating device 18 disposed on the top of the base 10, and an upper surface of the heating device 18 protrudes from a top surface of the base 10. The heating device 18 may be turned on for individual tough stains to further remove the tough stains by heating.
Specifically, heating device 18 is including setting up heat-conducting plate 6 on base 10 and being located the resistance wire 8 of heat-conducting plate 6 bottom, and the appearance and the holding tank 202 phase-match of heat-conducting plate 6 can be in treating the washing clothing to fix a position from this, avoids the cavitation liquid 13 in the cavitation recess 201 to spill simultaneously.
Preferably, a heat-insulating cover 7 is arranged between the bottom of the resistance wire 8 and the base 10, so that heat generated by the resistance wire 8 can be only diffused towards the heating plate, heat loss is avoided, energy is saved, targeted heating can be realized, and the cleaning rate is higher.
In this embodiment, be equipped with the constant head tank on the base 10, the heat preservation cover 7 is installed in the constant head tank, and heat-conducting plate 6 salient in the upper surface of base 10 is further convenient for heat cavitation liquid 13, and heat-conducting plate 6 is pressed close to with waiting to wash article 14 simultaneously and can improve heating efficiency.
Preferably, the vibration controller 4 is further included, the vibration controller 4 is arranged in the accommodating cavity, and the vibration controller 4 is electrically connected with the piezoelectric ceramic 5, so that the driving frequency of the piezoelectric ceramic 5 is convenient to adjust.
As shown in fig. 7, the following vibration modes of the piezoelectric ceramics are generally used:
LE mode: stretching vibration in the length direction perpendicular to the direction of the electric field;
TE mode: stretching vibration in the thickness direction parallel to the electric field direction;
FS mode: shear vibration in the plane perpendicular to the direction of the electric field;
TS mode: shear vibration in-plane parallel to the direction of the electric field;
wherein:
the piezoelectric ceramic corresponding to LE mode is d31The effect of this is that,
the piezoelectric ceramic corresponding to the TE mode is d33The effect of this is that,
the piezoelectric ceramic corresponding to FS mode is d36The effect of this is that,
piezoelectric ceramic corresponding to TS mode is d35And (4) effect.
In the present embodiment, the driving frequency of the piezoelectric ceramic 5 is set to 10 in the ultrasonic frequency range6The piezoelectric vibrator generates stretching vibration in a thickness direction parallel to the direction of the electric field, so-called d33The effect is that the waves generated in this mode are in a compressed and elongated form, which enables better cleaning of the items to be cleaned.
Preferably, the heating device further comprises a heating controller 9, and the heating controller 9 is electrically connected with the resistance wire 8, so that the heating temperature can be controlled and adjusted conveniently. Preferably, the temperature of the heating device 18 is adjusted within the range of 30 ℃ to 60 ℃, thereby improving the removal efficiency of stubborn stains and avoiding damage to the cleaned objects.
In the embodiment, the resistance wire 8 is fixed on the heat conducting plate 6, and the resistance wire 8 and the heat conducting plate 6 are bonded on the heat insulating cover 7 together to form a heating table, so that the storage of the mounting parts is facilitated. The heating table is fixed in the mounting groove of the base 10 to form a positioning projection, thereby facilitating the locking of the article 14 to be cleaned matching with the mounting groove.
Specifically, one end of the compression spring 3 abuts against the vibration controller 4, and the other end of the vibration controller 4 abuts against the preload cap 1. The piezoelectric ceramic 5 is fixedly bonded on one side of the cavitation controller and vibration controller 4 and the bottom of the accommodating cavity, so that the piezoelectric ceramic 5 is convenient to detach and mount.
Preferably, the base 10 is provided with an open slot for accommodating the heating controller 9, the heating controller 9 is arranged in the open slot, the slot opening of the open slot is provided with a pressing cover 11, the heating controller 9 is completely fixed through the pressing cover 11, and meanwhile, the heating controller 9 is convenient to detach and mount.
The resistance wire 8 is tightly attached to the bottom of the heat-conducting plate 6 in a fixed connection mode, then the heat-conducting plate 6 with the resistance wire 8 attached is placed at the upper end of the heat-insulating cover 7 and fixed, and heat transfer after the resistance wire 8 heats is guaranteed to be transferred only towards the heat-conducting plate 6. Meanwhile, the bottom of the heat-insulating cover 7 is fixed on the upper end face of the base 10, and forms a loop with the heating controller 9 placed inside the base 10 through an internal circuit. The pressing cover 11 limits the degree of freedom of the heating controller 9 by screwing, and ensures that the heating controller 9 is always fixed in the base 10. Preferably, the resistance wire 8 is fixed at the bottom of the heat conducting plate 6 and is permanently connected with the heating plate at the upper end of the heat insulating cover 7 to jointly form a heating table.
Preferably, the accommodating cavity, the accommodating groove 202 and the heating device 18 are coaxially arranged, so that the heating efficiency and the ultrasonic cavitation efficiency are further improved, the cleaning efficiency is improved, and the cleaning effect is ensured.
In this embodiment, the cavitation recess 201 and the mounting groove are arranged in the housing 2, the piezoelectric ceramic 5 is fixedly bonded at the bottom of the cavitation controller, and both are placed in the housing 2 together, so that the piezoelectric ceramic 5 is in close contact with the housing 2, the spring 3 generates elastic force to prop against the cavitation controller 4 through pre-tightening of the pre-tightening cover 1, so as to further ensure good contact effect between the piezoelectric ceramic 5 and the housing 2, in order to prevent electric leakage from occurring when the power supply is switched on, and threaten the safety of a user, the inner avoiding surface of the housing 2 is covered with an insulating coating 15 with the thickness of 0.05-0.15 mm, in this embodiment, the thickness of the insulating coating 15 is 0.1 mm.
In this embodiment, the vibration assembly 16 and the heating device 18 are each externally connected to a power plug 12. The input of the vibration controller 4 is a normal ac voltage, and the output is a high-frequency ac voltage. The input voltage of the heating controller 9 is a normal alternating voltage, and the voltage output to the resistance wire 8 is a direct current voltage.
Optionally, the spring 3 is permanently fixed inside the pre-tightening cap 1, thereby facilitating the management and storage of the components.
Preferably, in this embodiment, the cavitation liquid 13 can be considered to use two liquids, a and B, where a is a liquid susceptible to cavitation, such as: ethanol-containing substances; b is the traditional washing material for washing, and the main components of the traditional washing material are static polarity conversion agent and secondary contamination preventing agent in washing.
The working process of the invention is as follows: the power supply plug 12 supplies power to the vibration component 16, and after the cavitation controller is electrified, the working frequency of the alternating voltage output to the piezoelectric ceramic 5 is changed through the internal control action; the piezoelectric ceramic 5 starts to vibrate in a predetermined direction (i.e., d) by the driving voltage33Direction of vibration under effect) to generate ultrasonic waves; the generated ultrasonic waves are directly transmitted to the cavitation groove 201 filled with the cavitation liquid 13 through the outer shell 2, and cavitation is generated in the cavitation liquid 13 through the cavitation action of the ultrasonic waves to clean the local stains 1401.
When the dirt 1401 which is difficult to wash is met, the power plug 12 of the locking assembly 17 is connected, the heating temperature of the resistance wire 8 is set through the heating controller 9, and heat is transferred to the upper end surface of the heat conduction plate 6 through the heat conduction plate 6 to heat the part, which is stained with the dirt 1401, of the article 14 to be washed, so that the dirt 1401 which is difficult to remove on the article 14 to be washed is further removed.
By adopting the portable ultrasonic cavitation cleaner provided by the embodiment of the invention, the intractable stains can be effectively removed by utilizing the ultrasonic cavitation, and the local part of the clothes is treated in a targeted manner, so that the whole clothes is prevented from being cleaned due to a little stain, a new removing method is provided for the intractable stains, and the quality of the clothes is not damaged.
In summary, the embodiment of the present invention provides a portable ultrasonic cavitation cleaner, which fills the inside of a cavitation groove 201 with cavitation liquid 13, places local stains 1401 of an object 14 to be cleaned between the cavitation groove 201 and a locking assembly 17, and makes the local stains 1401 in a cavitation cavity filled with the cavitation liquid 13 through the cooperation between the accommodation groove 202 and the locking assembly 17. The clothes to be cleaned are located in a closed cavity formed between the cavitation groove 201 and the upper surface of the positioning protrusion of the locking component 17, ultrasonic shock waves (ultrasonic vibration energy) and ultrasonic cavitation action are generated in the cavity, so that the objects 14 to be cleaned are cleaned, and meanwhile, the vibration component 16 and the locking component 17 are detachably connected, so that the cleaning machine is convenient to carry and can quickly and effectively clean local stains 1401 on the clothes in time under the conditions of business trip and the like.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A portable ultrasonic cavitation cleaner is characterized by comprising a vibration assembly and a locking assembly for locking an article to be cleaned, wherein the vibration assembly comprises a shell provided with an opening accommodating cavity, a pre-tightening cover arranged on the opening and piezoelectric ceramics positioned at the cavity bottom of the accommodating cavity, an elastic reset device is arranged in the accommodating cavity, the bottom surface of the piezoelectric ceramics is abutted against the cavity bottom of the accommodating cavity, and the top surface of the piezoelectric ceramics is abutted against the lower end surface of the elastic reset device; the end, far away from the opening, of the outer shell is provided with a containing groove used for containing an article to be cleaned, a cavitation groove used for containing cavitation liquid is arranged in the containing groove, the top of the locking assembly is provided with a positioning bulge matched with the containing groove, the positioning bulge and the locking assembly form a step surface, and the top surface of the containing groove abuts against the step surface; still include vibration control ware, vibration control ware sets up hold the intracavity, vibration control ware with piezoceramics electricity is connected, vibration control ware is used for controlling piezoceramics is parallel or perpendicular to electric field direction vibration.
2. The portable ultrasonic cavitation cleaner of claim 1, wherein the locking assembly includes a base and a heating device disposed on top of the base, an upper surface of the heating device protruding above a top surface of the base.
3. The portable ultrasonic cavitation cleaner of claim 2, wherein the heating device comprises a heat conducting plate disposed on the base and a resistance wire located at the bottom of the heat conducting plate, and the shape of the heat conducting plate matches the receiving groove.
4. The portable ultrasonic cavitation cleaner as recited in claim 3, characterised in that a heat-insulating cover is provided between the bottom of the resistance wire and the base.
5. The portable ultrasonic cavitation cleaner of claim 4, wherein the base is provided with a positioning groove, the heat-insulating cover is mounted in the positioning groove, and the heat-conducting plate protrudes from the upper surface of the base.
6. The portable ultrasonic cavitation cleaner as recited in any one of claims 3 to 5, further comprising a heating controller, the heating controller being electrically connected to the resistance wire.
7. The portable ultrasonic cavitation cleaner as claimed in any one of claims 1 to 6, wherein the elastic return means further comprises a compression spring, one end of the compression spring abuts against the vibration controller, and the other end of the compression spring abuts against the pre-tightening cover.
8. The portable ultrasonic cavitation cleaner as recited in claim 6, wherein the base is provided with an open slot for accommodating the heating controller, the heating controller is disposed in the open slot, and a hold-down cover is disposed in a notch of the open slot.
9. The portable ultrasonic cavitation cleaner of any one of claims 2 to 5, wherein the accommodating chamber, the accommodating tank and the heating device are all coaxially arranged.
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