# US 11,078,899 B2 · Portable air cleaning apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,078,899 B2 - Document ID: US11078899B2 - Status: Granted - Kind: B2 - Application number: 16/035,986 - Filed: 2018-07-16 - Published: 2019-02-21 - Granted: 2021-08-03 - Earliest claimed: 2017-08-15 - Assignees: Microjet Technology Co., Ltd. - Applicants: Microjet Technology Co., Ltd. - Inventors: Hao-Jan Mou; Ta-Wei Hsueh; Shih-Chang Chen; Li-Pang Mo; Ching-Sung Lin; Yung-Lung Han; Chi-Feng Huang; Hsuan-Kai Chen - Web page: https://patentgrep.com/patent/US11078899B2 ## CPC - F24F 11/65: for selecting an operating mode - F04B 45/047: Pumps having electric drive - F04B 49/065: {and making use of computers} - F24F 1/04: Arrangements for portability - F24F 8/10: by separation, e.g. by filtering - F24F 8/192: by electrical means, e.g. by applying electrostatic fields or high voltages - F24F 8/80: Self-contained air purifiers - F24F 11/77: by controlling the speed of ventilators - F24F 13/28: Arrangement or mounting of filters - F04B 2205/09: Flow through the pump - F04B 2207/041: of flow - F24F 8/20: by sterilisation - F24F 8/22: using UV light - F24F 2110/64: Airborne particle content - F24F 2110/65: Concentration of specific substances or contaminants - F24F 2110/66: Volatile organic compounds [VOC] - F24F 2110/70: Carbon dioxide - F24F 2110/72: Carbon monoxide - F24F 2110/74: Ozone - F24F 2110/76: Oxygen - F24F 2221/12: transportable - Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters - Y02B 30/70: Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A portable air cleaning apparatus includes a housing, an actuating and sensing device and an air cleaning unit. The housing includes an inlet through hole and an outlet through hole. The actuating and sensing module and the air cleaning unit are disposed inside the housing. The actuating and sensing module includes an actuating device and a sensor. The actuating device drives an external air to flow into an interior of the housing via the inlet through hole and discharge the air via the outlet through hole, so as to form an internal air flow. The sensor detects the internal air flow to generate an air-sensing result, such that the actuating and sensing module can accordingly control the air cleaning unit to turn on, turn off, or adjust cleaning intensity. Thus, the portable air cleaning apparatus can monitor and automatically clean the ambient air at the same time. ## Claims ### Claim 1 A portable air cleaning apparatus, comprising: a housing comprising an inlet through hole and an outlet through hole in communication with an external environment; an actuating and sensing module disposed inside the housing and comprising: at least one actuating device driving air from the external environment to flow into an interior of the housing via the inlet through hole and discharge the air via the outlet through hole, so as to form an internal air flow, wherein the at least one actuating device is a piezoelectric actuating pump, the piezoelectric actuating pump further comprises: an air inlet plate having at least one inlet, at least one convergence channel and a central cavity defining a convergence chamber, wherein the at least one inlet allows the air to flow in, and wherein the convergence channel is in communication with the inlet and guides the air from the inlet toward the convergence chamber defined by the central cavity; a resonance plate having a central aperture and a movable part, wherein the central aperture is aligned with the convergence chamber and the movable part surrounds the central aperture; and a piezoelectric actuator aligned with the resonance plate; and at least one sensor disposed adjacent to the actuating device to sense the air to generate an air-sensing value; and an air cleaning unit disposed adjacent to the actuating and sensing module to clean the air. ### Claim 2 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the actuating and sensing module further comprises a microprocessor electrically connected to the actuating device, the sensor and the air cleaning unit, wherein the microprocessor receives the air-sensing value from the sensor and calculates the air-sensing value to generate an air-sensing result by comparing the air-sensing value with a preset standard value, and a control signal is transmitted to the air cleaning unit according to the air-sensing result, so as to control one of operations of turning on and turning off the air cleaning unit. ### Claim 3 (depends on 2) The portable air cleaning apparatus according to claim 2, wherein the microprocessor calculates the air-sensing value to generate a compared value by comparing the air-sensing value with the preset standard value, and the microprocessor transmits the control signal to the air cleaning unit according to the compared value, so as to control the air cleaning unit to adjust an intensity of cleaning operation. ### Claim 4 (depends on 2) The portable air cleaning apparatus according to claim 2, wherein the actuating and sensing module comprises a transmission module, and the transmission module is electrically connected to the microprocessor, wherein the microprocessor transmits the air-sensing value to the transmission module and the transmission module transmits the air-sensing value to a cloud data processing device through a communication transmission path, wherein the cloud data processing device controls at least one external air cleaning apparatus according to the air-sensing value to perform one operation selected from the group consisting of turning on the external air cleaning apparatus, turning off the external air cleaning apparatus and adjusting an intensity of cleaning operation. ### Claim 5 (depends on 4) The portable air cleaning apparatus according to claim 4, wherein the transmission module is one of a wired transmission module and a wireless transmission module. ### Claim 6 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the air cleaning unit comprises at least one filter. ### Claim 7 (depends on 6) The portable air cleaning apparatus according to claim 6, wherein the filter is one selected from the group consisting of an activated carbon, a non-woven fabric, an electrostatic air filter and a high-efficiency particulate arrestance. ### Claim 8 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the air cleaning unit comprises at least one selected from the group consisting of a negative ion generator, a sterilizing light generator, a photocatalyst and combinations thereof. ### Claim 9 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the air contains one selected from the group consisting of carbon monoxide, carbon dioxide, sulfur dioxide, nitrogen dioxide, suspended particle, fine suspended particle, oxygen, ozone and combinations thereof. ### Claim 10 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the air contains a volatile organic compound, wherein the volatile organic compound is one selected from the group consisting of alkenes, alcohols, ketones, benzene rings, halo-alkanes and nitrogen-containing organic compounds. ### Claim 11 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the air contains one selected from the group consisting of an inorganic gas, a biomarker, a virus, a bacterium and a microorganism. ### Claim 12 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the sensor comprises at least one selected from the group consisting of an oxygen sensor, a carbon monoxide sensor, a carbon dioxide sensor, a temperature sensor, a liquid sensor, a moisture sensor, an ozone sensor, a fine particle sensor, a volatile organic compound sensor, a light sensor and combinations thereof. ### Claim 13 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the sensor comprises a graphene sensor. ### Claim 14 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the actuating and sensing module comprises a transmission module having a positioning module, and the positioning module generates a position data, wherein the transmission module transmits the air-sensing value and the position data to a cloud data processing device through a communication transmission path, so as to form an air-quality monitor database. ### Claim 15 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein a gap is formed between the resonance plate and the piezoelectric actuator to define a first chamber, so that the air from the at least one inlet of the air inlet plate is converged to the central cavity along the at least one convergence channel and flows into the first chamber through the central aperture of the resonance plate when the piezoelectric actuator is enabled, whereby the air is further transferred through a resonance between the piezoelectric actuator and the movable part of the resonance plate. ### Claim 16 (depends on 1) The portable air cleaning apparatus according to claim 1, wherein the piezoelectric actuator comprises: a suspension plate being a square suspension plate and having a first surface, an opposing second surface and a bulge, wherein the suspension plate is permitted to undergo a bending vibration; an outer frame arranged around the suspension plate; at least one bracket connected between the suspension plate and the outer frame for elastically supporting the suspension plate; and a piezoelectric plate, wherein a length of a side of the piezoelectric plate is smaller than or equal to a length of a side of the suspension plate, and the piezoelectric plate is attached on the first surface of the suspension plate, wherein when a voltage is applied to the piezoelectric plate, the suspension plate is driven to undergo the bending vibration, wherein the piezoelectric actuating pump comprises a conducting plate, a first insulation plate and a second insulation plate, and the air inlet plate, the resonance plate, the piezoelectric actuator, the first insulation plate, the conducting plate and the second insulation plate are sequentially stacked on each other. ### Claim 17 A portable air cleaning apparatus, comprising: at least one housing comprising at least one inlet through hole and at least one outlet through hole in communication with an external environment; at least one actuating and sensing module disposed inside the housing and comprising: at least one actuating device driving at least one air from the external environment to flow into an interior of the housing through the inlet through hole and discharge the air through the outlet through hole, so as to form at least one internal air flow, wherein the at least one actuating device is at least one piezoelectric actuating pump, the at least one piezoelectric actuating pump further comprises: at least one air inlet plate having at least one inlet, at least one convergence channel and at least one central cavity defining at least one convergence chamber, wherein the at least one inlet allows the air to flow in, and wherein the at least one convergence channel is in communication with the at least one inlet and guides the air from the at least one inlet toward the at least one convergence chamber defined by the at least one central cavity; at least one resonance plate having at least one central aperture and at least one movable part, wherein the at least one central aperture is aligned with the at least one convergence chamber and the at least one movable part surrounds the at least one central aperture; and at least one piezoelectric actuator aligned with the at least one resonance plate; and at least one sensor disposed adjacent to the actuating device to sense the air to generate at least one air-sensing value; and at least one air cleaning unit disposed adjacent to the actuating and sensing module to clean the air.