CPC Definition - Subclass B60H

Last Updated Version: 2019.05
ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
Definition statement

This place covers:

Arrangements or adaptations of heating, cooling, ventilating or other air treating devices specially for passengers or goods in spaces of vehicles.

Only inventions, that relate exclusively to vehicles are covered by this subclass.

Relationships with other classification places

Devices providing other air treatment (humidifying, dehumidifying, scenting, filtering) B60H 3/00

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Garments or clothes including a HVAC

A41D

Filters per se

B01D

Ventilating solely by opening windows, doors, roof parts or the like

B60J

Heating or ventilating devices for vehicle seats independent from the vehicle HVAC

B60N

Window or windscreen cleaners using air, e.g. defrosters

B60S

HVAC for railway vehicles

B61D

HVAC for boats or ships

B63J

HVAC for air crafts

B64D 11/0626

Compressors per se

F04B

Heat exchangers comprising heat generating means

F24H

HVAC for buildings

F25B

Heat exchangers per se

F28F, F28D

Heating, cooling or ventilating batteries or accumulators and independent from the cabin HVAC

H01M

Special rules of classification

Refrigerated goods vehicles: B60P if the vehicle aspect is pertinent

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

HVAC

Heating, Ventilating and Air Conditioning (devices or systems)

Heating, cooling or ventilating {[HVAC]} devices (heating, cooling or ventilating devices providing other air treatment, the other treatment being relevant, B60H 3/00; ventilating solely by opening windows, doors, roof parts, or the like B60J; heating or ventilating devices for vehicle seats B60N 2/56; vehicle window or windscreen cleaners using air, e.g. defrosters, B60S 1/54)
Definition statement

This place covers:

Heating, cooling and/or ventilating (HVAC) devices for the air inside a vehicle cabin or a load area.

References
Limiting references

This place does not cover:

Devices for other treatment of air (e.g. scenting, moistening, drying, filtering)

B60H 3/00

Special rules of classification

B60H 1/00 and subgroups: vehicle specific documents

B60H 1/32 and subgroups: refrigerant circuit and component specific documents

{for load cargos on load transporting vehicles}
Definition statement

This place covers:

Structure of HVAC units the vehicle, air ducts.

References
Limiting references

This place does not cover:

If refrigeration circuit features are characterizing

B60H 1/3232

Informative references

Attention is drawn to the following places, which may be of interest for search:

Refrigerated goods vehicles in general

B60P 3/20

{HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit}
Relationships with other classification places

Heating/cooling liquid urea for exhaust gas treatment:

F01N 3/2066 and Indexing Code F01N 2610/11 cool, F01N 2610/10 heat.

{for the battery (arrangement of batteries B60R 16/04)}
Definition statement

This place covers:

Battery cooling and/or heating linked to the vehicle interior air conditioning circuit.

References
Limiting references

This place does not cover:

When the battery cooling circuit is completely separate from the cabin air conditioner

H01M

Informative references

Attention is drawn to the following places, which may be of interest for search:

Mounting batteries in electric vehicles

B60K 1/04

Batteries in hybrid vehicles

B60K 6/28

Monitoring batteries

B60L 58/00

Arrangement of batteries

B60R 16/04

Cooling batteries

H01M 6/5038

Battery technology as such

Y02E 60/12

Special rules of classification

If there is an additional evaporator for cooling the battery in an airstream, also classify in B60H 1/323.

{Arrangements permitting a rapid heating of the heating liquid (B60H 1/00492, B60H 1/03 take precedence; aiding engine start by heating of engine coolants F02N 19/10)}
Relationships with other classification places

Software for engine control related to temperature: F02D 41/00

Heating engine with electric means: F02N 19/04

{Heat exchangers for air-conditioning devices (B60H 1/3227 takes precedence)}
Relationships with other classification places

Heat exchangers per se: F28D, F28F

{of the liquid-air type}
Definition statement

This place covers:

Coolant / air heat exchangers are classified here.

Special rules of classification
{of the gas-air type (B60H 1/18 takes precedence)}
Definition statement

This place covers:

Refrigerant / air heat exchangers are classified here

References
Limiting references

This place does not cover:

Air / Air heat exchangers

B60H 1/00321

{of the liquid-liquid type}
Definition statement

This place covers:

Refrigerant / water or refrigerant / refrigerant or water/water heat exchangers, e.g. stacked plates.

{Air-conditioning arrangements specially adapted for particular vehicles}
Definition statement

This place covers:

HVAC characterized by features related to the type of vehicle are classified here and in the subclasses.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

{for caravans or trailers}
Definition statement

This place covers:

HVAC for camping trailers, recreational vehicles and other trailers.

References
Limiting references

This place does not cover:

HVAC for load transport vehicle trailers (aspects of the trailer)

B60H 1/00014

HVAC for load transport vehicle trailers (aspects of the refrigeration unit itself)

B60H 1/3232

Informative references

Attention is drawn to the following places, which may be of interest for search:

Animal transport vehicles as such

B60P 3/04

Refrigerated goods vehicles as such

B60P 3/20

{for vehicles carrying large numbers of passengers, e.g. buses}
Definition statement

This place covers:

HVAC specific to all road vehicles carrying more passengers than a standard passenger car.

References
Limiting references

This place does not cover:

Railway vehicles,

B61D 27/00

Aircrafts

B64D 13/00

{for tractor or load vehicle cabins}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Truck cabins with sleeping accommodations

B62D 33/0612

Tractor and off-road vehicle cabins

B62D 33/0617

{for vehicles having an electrical drive, e.g. hybrid or fuel cell}
Relationships with other classification places

When batteries or fuel cells are cooled or heated: B60H 1/00278

References
Limiting references

This place does not cover:

When the fuel cell is used for driving the AC components only

B60H 1/00428

Informative references

Attention is drawn to the following places, which may be of interest for search:

Hybrid vehicles

B60K 6/00

Electric vehicles with batteries or fuel cells

B60L 50/50

Series hybrid vehicles

B60L 50/61

Control

B60W 20/00

Heating a fuel cell

H01M 8/04022

Cooling a fuel cell

H01M 8/04059

For electric or hybrid cars

FI:B60H1/22&671

{for electric vehicles having only electric drive means}
Definition statement

This place covers:

Vehicles driven by an electric motor. Includes fuel cell vehicles and vehicles having a combustion motor only for generating electric power ("range extender").

References
Limiting references

This place does not cover:

When electric and hybrid vehicles are mentioned equally

B60H 1/00385

If a fuel cell is used only for driving a HVAC

B60H 1/00428

{for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles}
Definition statement

This place covers:

All hybrid vehicles where the combustion engine can be mechanically coupled to the wheels for vehicle propulsion.

References
Limiting references

This place does not cover:

When electric and hybrid vehicles are mentioned equally

B60H 1/00385

{for open or convertible vehicles}
Definition statement

This place covers:

Vehicles having body parts that can be opened (e.g. convertibles, golf carts) and this affects the air conditioning system.

Relationships with other classification places
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Convertibles in general

B60J 7/00

Seats having "air scarfs"

B60N 2/5671

{for military, emergency, safety or security vehicles}
Definition statement

This place covers:

Vehicles like ambulances, tanks, anti bacteriological warfare vehicles etc. where the air conditioning system is specially adapted to the use of the vehicle (e.g. germ filters, pressurized cabin).

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Ambulances

A61G 3/008

Armored vehicles in general.

F41H 7/00

{electric}
Definition statement

This place covers:

Aspects of power supply (e.g. use of converters / inverters) to drive components (e.g. compressors) of the HVAC.

Solar power and fuel cell power used for air conditioning when the vehicle drive is not electric.

Relationships with other classification places

Domestic air conditioning using natural energy, see F24F 5/0046

Semiconductor Solar Cells per se: H01L 31/042

References
Limiting references

This place does not cover:

DC-DC converters

H02M 3/00

AC-AC converters

H02M 5/00

AC/DC converters

H02M 7/00

{Ventilation unit, e.g. combined with a radiator (control systems for ventilators B60H 1/00828)}
Definition statement

This place covers:

Fans in combination with other components of the HVAC unit, e.g. with heat exchangers.

Relationships with other classification places

Ventilators in general: F04D 15/0005, F04D 25/08

Electrical motors: H02K

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Fan casings

F04D 29/40

For radial fans:

F04D 29/4226

For axial fans:

F04D 29/526

Assembly / disassembly of fans:

F04D 29/626

Heaters & casing details & integrated fans

F24D 19/06

{Air-conditioning devices using the Peltier effect (for air-conditioning in general F24F 5/0042; for refrigeration F25B 21/02; electric devices exhibiting the Peltier effect H01L 35/00)}
Definition statement

This place covers:

Thermoelectric modules (based on the Peltier or Seebeck effect) in HVAC units are classified here.

References
Limiting references

This place does not cover:

Thermoelectric modules in fuel burning heaters

B60H 2001/2275

Informative references

Attention is drawn to the following places, which may be of interest for search:

Machines using Peltier

F25B 21/02

Thermoelectric cooling devices per se

H01L 35/00

Peltier elements

FI: B60H1/32&621G

{Valves for air-conditioning devices, e.g. thermostatic valves (valves per se F16K; thermostatic valves per se G05D 23/02)}
Definition statement

This place covers:

Vehicle HVAC characterized by specially adapted valves for refrigerant and/or coolant.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Expansion Valves

F25B 41/062

Control of expansion valves

G05D 7/0635

{comprising regenerative heating or cooling means, e.g. heat accumulators}
Definition statement

This place covers:

HVAC units comprising accumulators storing heat or both heat and cold are classified here.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

If only cold storage is included in the HVAC

B60H 1/005

Cold storages used in domestic HVAC

F28D 20/00

{Mounting or fastening of components in housings, e.g. heat exchangers, fans, electronic regulators}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Mounting heat exchangers in vehicle bodies

B60K 11/04

Front end modules

B62D 25/085

Sealings

F16J 15/00

Fastening elements on heat exchangers

F28F 9/002

{the housing or parts thereof being integrated in other devices, e.g. dashboard}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Dashboards

B60K 37/00

Dashboards having incorporated ventilation channels

B62D 25/142

{of air ducts}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Integrated air ducts

B60K 35/00, B60K 37/00

Ducts, integrated guide vanes

F15D 1/04

Ducting arrangements for domestic air treatment

F24F 13/02

{of liquid ducts, e.g. for coolant liquids or refrigerants}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Pipes, joints of fittings per se

F16L

Flexible pipes with four or more layers, e.g. for refrigerants

F16L 11/045

Couplings with fluid cut-off means using two valves

F16L 37/36

Fluid-circulation arrangements for domestic cooling

F25B 41/00

{Means for monitoring, testing or servicing the air-conditioning}
Definition statement

This place covers:

Service units for servicing the vehicle HVAC.

Includes units for purging, evacuating, filling and testing such an HVAC.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

For filling

F25B 45/00

For testing

F25B 49/005

{Add-on devices, e.g. heat/cooling boxes, compartment dividers, upgrade sets}
Definition statement

This place covers:

Receptacles connected to the vehicle HVAC for cooling or heating.

Partition elements used inside the vehicle cabin for separating a cooled or heated compartment.

References
Limiting references

This place does not cover:

Receptacles for food or beverages with refrigerating or warming systems:

B60N 3/104

{Control members, e.g. levers or knobs (B60H 1/00985 takes precedence)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Remote control devices

G07C 5/008

Switches per se

H01K15/00

Touch switches per se

H03K 17/96

Capacitive switches

H03K 17/962

{Construction or arrangement of damper doors (control systems or circuits for damper doors B60H 1/00835)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Air flow control members for domestic air-conditioning

F24F 13/08

{Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Monitoring multiple temperatures

G01K 1/026

{by detection of the vehicle occupants' presence; by detection of conditions relating to the body of occupants, e.g. using radiant heat detectors}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Sensors in seats

B60N 2/002

{the input being solar radiation}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Solar sensors

G01J

{the input being a vehicle driving condition, e.g. speed (B60H 1/00828, B60H 1/00864 take precedence)}
Definition statement

This place covers:

Control systems using vehicle speed as input.

Relationships with other classification places

B60H 1/3208 if control of the compressor is based on the vehicle speed.

References
Limiting references

This place does not cover:

If the vehicle position is characterizing

B60H 1/00771

Stop/Idle related control methods

B60H 1/00778

{the input being a vehicle position or surrounding, e.g. GPS-based position or tunnel}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Specially adapted for navigation in a road network

G01C 21/26

{the input being air quality}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Air quality sensors per se

G01D

{Damper doors, e.g. position control (construction or arrangement of damper doors B60H 1/00664; B60H 1/00864 takes precedence)}
Relationships with other classification places

Means (levers, gears...) for moving doors see B60H 1/00857

{characterised by the means connecting the initiating means, e.g. control lever, to the damper door}
Definition statement

This place covers:

Drive means for doors etc are classified here.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Gears

F16H

Domestic use

F24F 13/1426

{Controlling the flow of liquid in a heat pump system (controlling the properties of the refrigerant liquid, e.g. pressure or temperature, B60H 1/3204)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

The system uses a heat pump

F24D 19/1039

Heat pumps

F25B 30/00

{Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods}
Definition statement

This place covers:

Methods for detection of insufficient refrigerant charge (when performed by the vehicle itself) are classified here.

Relationships with other classification places

See B60H 1/3233 for compressor saving methods.

F25B 2700/04 (B60H): detecting the charge level of refrigerant

References
Limiting references

This place does not cover:

Devices for Testing HVAC are classified in

B60H 1/00585

Informative references

Attention is drawn to the following places, which may be of interest for search:

Safety devices for refrigeration machines, e.g. level control of refrigerant

F25B 49/005

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

DE

Füllstandserkennung

{Control systems or circuits characterised by display or indicating devices, e.g. voice simulators (characterised by the input of sound using a voice synthesizer B60H 1/00757; B60H 1/00978 takes precedence)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Instruments in dashboards

B60K 35/00

Display or monitoring for domestic air-conditioning

F24F 11/50

the heat being derived from the propulsion plant {(B60H 1/00492 takes precedence)}
References
Limiting references

This place does not cover:

The use of heat of electric motors

B60H 1/143

{from the cooling liquid of the propulsion plant and from a viscous fluid heater}
Relationships with other classification places

If no cooling water of the engine is used, then classify in B60H 2001/146

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Viscous fluid heaters

F24V 40/00

otherwise than from cooling liquid of the plant {, e.g. heat from the grease oil, the brakes, the transmission unit (B60H 1/03 takes precedence)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Liquid cooled brakes

F16D 65/853

{the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries}
Definition statement

This place covers:

The source of heat is waste heat from electric components.

Relationships with other classification places

If an electric heater is provided: B60H 1/2215

the heat being derived otherwise than from the propulsion plant {(B60H 1/0025, B60H 1/00492 and B60H 1/03 take precedence)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Water heaters

F24H 1/00

Air heaters

F24H 3/00

Details of heaters in general

F24H 9/00

{the heat being derived from burners (burners in general F23C, F23D, F24H 9/18)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Fuel burning heaters with evaporation means

F23D 3/40

Exhaust systems

F23J 11/00

Fuel supply

F23K

Controlling combustion

F23N

Vehicle heating

F23N 2041/14

Ignition means

F23Q

Fluid fuel water heaters

F24H 1/165

{the heat being derived from electric heaters}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Supply of electric power to heating circuits in electric vehicles

B60L 1/02

Electric resistance heating for domestic use

F24D 13/02

Electric water heaters in general

F24H 1/162

Electric heating for vehicles

H05B 1/0236

{controlling the operation of electric heaters}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Helically or spirally coiled water heaters with electrical energy supply

F24H 1/162

{arrangements of electric heaters for heating an intermediate liquid (B60H 1/034 takes precedence)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Heating means for windscreen-cleaning liquid

B60S 1/488

Water heaters specially adapted for vehicle systems

F24H 1/009

Air heaters using electric energy supply

F24H 3/0429

{characterised by the location of ventilation devices in the vehicle}
Definition statement

This place covers:

Ventilating systems in a vehicle characterized by the position of the nozzles relative to the vehicle.

{Disposition of several air-diffusers in a vehicle for ventilation-air circulation in a vehicle cabin}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Dashboards having incorporated ventilation channels

B62D 25/142

{using one-way valves}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Check valves

F16K 15/00

Air-flow control members with movable members for domestic air-conditioning

F24F 13/14

Ventilating openings in vehicle exterior; Ducts for conveying ventilating air
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Radiator guards

B60R 19/52

{Openings in or on the vehicle roof}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Roof Hatches per se

B60J 7/1635

the openings being situated directly in front of vehicle front window
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Cowls for vehicles

B62D 25/081

{using absorption or adsorption}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Liquids for absorption type circuits

C09K 5/047

Sorbtion machines in general

F25B 15/00, F25B 17/00

{using evaporation, i.e. not including a compressor, e.g. involving fuel or water evaporation (B60H 1/3235 takes precedence; in general F25B 19/00, F25D 7/00)}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Domestic air-condition systems using evaporation

F24F 5/0035

Machines using evaporation of refrigerant without recovery of the vapour

F25B 19/00

Devices using evaporation without recovery of the vapour

F25D 7/00

Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation

F28D 5/00

{using compression (B60H 1/3233 takes precedence)}
References
Limiting references

This place does not cover:

Cooling devices characterised by condensed liquid drainage means

B60H 1/3233

Informative references

Attention is drawn to the following places, which may be of interest for search:

Refrigerant liquids

C09K 5/041

Cooling devices using compression, in general

F25B, F25D

{characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives (B60H 1/3208, B60H 1/3226 take precedence)}
Definition statement

This place covers:

Hybrid compressor drives (mechanic and electric) are classified here

References
Limiting references

This place does not cover:

Vehicle drive related control of the compressor drive means

B60H 1/3208

Self-contained devices

B60H 1/3226

{characterised by comprising auxiliary or multiple systems, e.g. plurality of evaporators, or by involving auxiliary cooling devices}
Relationships with other classification places

If batteries are cooled, use B60H 1/00278.

{particularly adapted for load transporting vehicles (B60H 1/3226 takes precedence)}
Definition statement

This place covers:

Refrigerant units for truck cargo space

Relationships with other classification places

B60H 1/00014 if the aspects of the vehicle are characterizing.

References
Limiting references

This place does not cover:

Self-contained devices

B60H 1/3226

Informative references

Attention is drawn to the following places, which may be of interest for search:

Refrigerated goods vehicles

B60P 3/20

{characterised by condensed liquid drainage means}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Evacuating condensate in domestic air-conditioning

F24F 13/222

Nozzles; {Air-diffusers} (dispositions of air diffusers in a vehicle B60H 1/247)
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Outlets for windshield defrosting

B60S 1/54

Outlets for directing or distributing air into rooms or spaces for domestic air-conditioning

F24F 13/06 , F24F 13/08, F24F 13/10 , F24F 13/14.

Air-flow control members, e.g. louvres, grilles or flaps for domestic air-conditioning

F24F 13/08

{Outlets providing a vortex, i.e. a spirally wound air flow}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Domestic air-conditioning

F24F

Other air-treating devices
Definition statement

This place covers:

Devices for treating air inside or flowing into a cabin or load area of a vehicle, characterized by other aspects than heating, cooling or ventilation.

These aspects are e.g: Scenting, Deodorizing, Ionizing, Humidity control, Filtering.

Relationships with other classification places

Control methods using detection of air quality or humidity as input: B60H 1/00735.

{Adding substances other than water to the air, e.g. perfume, oxygen}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Human necessities

A61L 9/122

Air treatment other than cooling or heating in domestic air-conditioning systems

F24F 3/12, F24F3/18, F24F 2003/1689

{Electrically conditioning the air, e.g. by ionizing}
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

By UV-Light

A61L 9/20

Deodorizing by ionizing of air,

A61L 9/22

Air stream with ions

A61N 1/44

Electric means for purifying

F24F 3/166

Sterilizing with UV light

F24F 2003/1664

Ionizing

F24F 2003/1682

Odorizing

F24F 2003/1689

Ion type

FI-Terms: B60H3/06&A

Deodorizing

FI-Terms B60H3/00&F

Moistening

FI-Terms B60H3/00&Z

{Smell or pollution preventing arrangements (B60H 3/0007, B60H 3/0071, B60H 3/02, B60H 3/06 take precedence)}
Definition statement

This place covers:

Cleaning or disinfecting of the interior of the HVAC for preventing or removing smell or malodour, e.g. malodour caused by fungi or accumulated dirt.

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses

A61L 2/00

Cleaning internal surfaces in general

B08B 9/027

Cleaning substances

C11D

Cleaning by jets

F28G 1/163

Cleaning by using chemical substances

F28G 9/00

Moistening {; Devices influencing humidity levels, i.e. humidity control (B60H 1/3202, B60H 1/3207 take precedence)}
Definition statement

This place covers:

  • Means for reducing or increase of air humidity.
  • Control of air humidity.
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Domestic air-conditioning systems with air treatment by humidification or dehumidification

F24F 3/14

Air-humidification of domestic rooms

F24F 6/00

Filtering {(B60H 3/0078 takes precedence)}
Definition statement

This place covers:

Cleaning outside or recirculated air entering the vehicle cabin by the use of filters.

References
Limiting references

This place does not cover:

Cleaning the environmental atmosphere (not the air for the cabin) by a filter in a vehicle

B01D, B01D 2279/40

Informative references

Attention is drawn to the following places, which may be of interest for search:

For general filter aspects

B01D 46/0027

Filtering by adsorption or absorption

B01D 46/0036

Filter condition indicators

B01D 46/0086

Filters with stationary adsorbents

B01D 53/04

Arrangement or mounting of filters for domestic air-conditioning

F24F 13/28