A heating, ventilation and/or air-conditioning apparatus (1) for the passenger compartment of a motor vehicle includes a housing (2) comprising a first air inlet (3) and a second air inlet (4). The housing (2) directs an inner air flow (Fi) from the first air inlet (3) and/or the second air inlet (4) and contains at least a first heat exchanger (5). The housing (2) includes: an air flow channel (24) directing the inner air flow (Fi) in the housing (2) while bypassing the first heat exchanger (5); and an air inlet duct (23) directing the inner air flow (Fi) in the housing (2) through the first heat exchanger (5). A heating, ventilation and/or air-conditioning installation for the passenger compartment of a motor vehicle includes: an air conditioning loop through which a coolant flows. The loop includes at least one compressor, a first expansion member, an outer heat exchanger and the first heat exchanger (5). The installation also includes the heating, ventilation and/or air-conditioning apparatus (1).

The invention relates to a vehicle air conditioner (10), with an evaporator (12) for supplying cold air (14) which can be fed to a vehicle interior (16), an air-mixing region (18) which is connected downstream of the evaporator (12) and can supply mixed air at a predeterminable temperature, a first ventilation duct (20) which is connected to the air-mixing region (18) and can conduct mixed air from the air-mixing region (18) into a front region (22) of the vehicle interior (16), and a second ventilation duct (24) which is connected to the air-mixing region (18) and can conduct mixed air from the air-mixing region (18) into a rear region (26) of the vehicle interior (16), wherein, in addition, a separate cold air duct (28), which can feed cold air (14), which is supplied by the evaporator (12), to the vehicle interior (16) in substantially unmixed form is provided.

The invention relates to a heating, ventilation and/or air-conditioning device (1) for a motor vehicle, characterised in that it comprises at least one first air circulation channel (3), at least one second air circulation channel (4), and means (5, 6) for generating an air stream in the first air circulation channel (3) and/or in the second air circulation cannel (4), the device (1) also comprising means for the inflow of a cleaning product (13, 16) ending in the first air circulation channel (3) and/or in the second air circulation channel (4).

A vehicular air-conditioning unit has an air-conditioning case, a first ventilation passage and a second ventilation passage, a first communication-ventilation passage defined in the air-conditioning case, the first communication-ventilation passage through which one end of the first ventilation passage communicates with one end of the second ventilation passage, a first heat exchanger that heats or cools air flowing in the first ventilation passage, a second heat exchanger that heats or cools air flowing in the second ventilation passage, and a blowing mode switching device setting any one of blowing modes. The blowing modes include (i) a first blowing mode in which air is blown into a vehicle compartment after flowing through the first ventilation passage and in which air is blown into the vehicle compartment after flowing through the second ventilation passage and (ii) a second blowing mode in which air flows into the second ventilation passage through the first communication-ventilation passage after flowing through the first ventilation passage and is blown into the vehicle compartment.

A vehicle air conditioning system performing individual air conditioning in four zones for left and right spaces of front and rear seats includes a front seat heating, ventilation, and air conditioner (HVAC) separately supplying air having passed through left and right flow paths of a front seat flow path into the left and right spaces of the front seat to perform two-zone individual air conditioning for the front seat. A flow guide is provided in an upstream side space of an evaporator in an internal space of the air conditioning casing of the front seat HVAC to divide the upstream side space of the evaporator to have a left flow path and a right flow path. The flow guide and a side portion of the air conditioning casing opposite to the flow guide have a curved stepped portion in cross-section.

A vehicular air conditioner includes a casing, a blower fan, and a heating heat exchanger. The air passage in the casing is divided into an outside air passage and an inside air passage. The heating heat exchanger is disposed downstream of the blower fan in the casing. The blower fan is disposed to extend over a first outside air space, a second outside air space, a first inside air space, and a second inside air space in the air passage. The rotational direction of the blower fan is set so that each of the plurality of blades of the blower fan passes through the first outside air space, the first inside air space, the second inside air space, and the second outside air space in this order when the plurality of blade are rotating.

A heat exchanger assembly for cooling of air includes a blower, an air duct and a heat exchanger integrated in a coolant circuit designed to allow coolant to flow therethrough and air to be applied to it. Heat from the air is transferred to the vaporizing coolant. The blower is arranged upstream of the heat exchanger in the airflow direction so that waste from the blower heats the air before reaching the heat exchanger. The heat exchanger is designed as tubular heat exchanger with tubes arranged in rows having a double-row design. A method for operating a climate control system for a combined refrigeration system and heat pump operation for cooling and for heating, and a method for identifying and prevention of icing of the evaporator of the climate control system are also disclosed.

Disclosed therein is a dual zone type air conditioner for a vehicle, which includes: an air volume control door mounted between a blower and an evaporator for controlling the degree of opening of first and second passageways so as to control the volume of air blown to the inside of an air-conditioning case; and bypass passageways disposed in the air volume control door to supply a predetermined air volume to a closed passageway even though the air volume control door is at the location to close the first passageway or the second passageway, thereby preventing a sudden change in air volume by widening a control interval of the air volume control door because the first-stage air volume can be realized even though the air volume control door closes one of the air passageways, and reducing a whistle noise by securing a predetermined cross-sectional area of the air passageway through the bypass passageways even though the cross-sectional area of the air passageway gets narrower while the air volume control door closes one of the air passageways.

An air conditioning system for conditioning the air of a passenger compartment of a motor vehicle comprises a housing with a first and a second flow conduit for conducting air and a coolant circuit with at least two heat exchangers, wherein a first heat exchanger is arranged in the first flow conduit and a second heat exchanger is arranged in the second flow conduit. The first heat exchanger can be operated independently of the operating mode as an evaporator and the second heat exchanger can be operated independently of the operating mode as a condenser. The housing comprises at least one air conduction device with which an air mass flow conditioned in the air conditioning system can be discharged into the environment. The coolant circuit is constructed with a heat exchanger which is arranged outside of the housing and can be operated as an evaporator or as a condenser.

The invention concerns a control device (1) for a heating and/or ventilation and/or air conditioning installation of a motor vehicle, the installation comprising an air treatment unit (9) comprising air outlets intended to open into a zone (ZG, ZD) of the passenger compartment of the vehicle, including at least first and second air outlets, and at least first (21) and second (23, 25) members for mixing the air flow. According to the invention, the device (1) comprises a user interface (5) comprising at least first (51) and second (53) control members, and a control circuit (7) for receiving, from each control member (51, 53), an input signal with its own temperature setpoint, and for delivering separate control signals for controlling the first and second mixing members (21, 23, 25).