The invention relates to an HVAC field device comprising a plurality of HVAC device blocks. The HVAC field device comprises: a) a base HVAC device block comprising: a base housing; an electric motor configured to drive an actuated part, and/or a sensor for the measurement of operational parameters of an HVAC system; a base control module connected to the electric motor, and/or the sensors; a base near field communication (NFC) circuit connected to the base control module; and b) a first add-on HVAC device block comprising: an add-on housing and a first add-on NFC antenna, wherein the base HVAC device block and the first add-on HVAC device block are mechanically connected, and wherein the first NFC antenna is electrically connected to the base HVAC device block.

An air conditioner unit includes an indoor heat exchanger assembly positioned in an indoor portion of the air conditioner unit. The indoor heat exchanger assembly includes an indoor heat exchanger and an indoor fan. The air conditioner unit also includes a heating unit. The heating unit may be positioned in the indoor portion of the air conditioner unit downstream of the indoor fan and/or at the exhaust side of the indoor fan.

An air conditioner unit includes an indoor heat exchanger assembly positioned in an indoor portion of the air conditioner unit. The indoor heat exchanger assembly includes an indoor heat exchanger and an indoor fan. The air conditioner unit also includes a heating unit. The heating unit may be positioned in the indoor portion of the air conditioner unit downstream of the indoor fan and/or at the exhaust side of the indoor fan.

A base HVAC device block (10) comprising a housing (11); an HVAC functional device (M/S); an extension interface (16A); an external electrical interface (18) for the transmission of electrical power and data signal(s); and an electronic circuit (12) connected with the HVAC functional device (M/S). In a first configuration, the base HVAC device block (10) is configured to connect the external electrical interface (18) with the electronic circuit (12) for transmission of data signal(s) and thereby provide HVAC functionality(s) of a first category. In a second configuration, the base HVAC device block (10) is configured to route the transmission of data signal(s) through an add-on electronic circuit (22) of an add-on HVAC device block (20) attached to the base HVAC device block (10) via an add-on interface (26B) of the add-on HVAC device block (20) to thereby provide HVAC functionality(s) of a second category.

A two stage evaporative cooling device has a central chamber, divided into an upper chamber and a lower chamber by a divider. one or more heat exchange units surrounding the central chamber; an upper fan arranged above the upper chamber and a lower fan arranged below the lower chamber; and a water circuit; wherein each heat exchange unit comprises an evaporative cooling element and an air to water pre-cooler, the pre-cooler being placed ahead of a lower portion of the cooling element and the water circuit is arranged to irrigate the cooling element and collect the irrigated water below the cooling element for delivery to the pre-cooler whereby pre-cooled air may be drawn inwardly through the pre-cooler and the lower part of the cooling element by the lower fan and ambient air may be drawn inwardly through the upper part of the cooling element by the upper fan.

In an air conditioning unit, a chamber 3 is provided therein with a divider 36, 38 which divides an interior of the chamber 3 into one space where the air conditioner 20 is placed and the other space where the blowers 5 are placed, the air conditioning unit further comprises an air inflow port 32 for introducing the air from outside of the chamber 3 into the one space, and the divider 36, 38 forms a divider opening 42, and therefore, it is an object of the present invention to provide an air conditioning unit capable of mixing, with each other, air which is blown out from an air conditioner and whose temperature is adjusted and air which bypasses the air conditioner and whose temperature is not adjusted.

A method of manufacturing an HVAC field device (1) from a plurality of HVAC device blocks (10, 20.1-n), comprising the steps of providing a base HVAC device block (10); providing one or more add-on HVAC device block(s) (20.1-n) and stacking the base HVAC device block (10) and the one or more add-on HVAC device block(s) (10, 20.1-n), thereby mechanically connecting a connection interface (15A, 25A.1-n) of the first type to a connection interface (25B.1-n) of the second type of adjacent HVAC device blocks (10, 20.1-n).

A method of manufacturing an HVAC field device (1) from a plurality of HVAC device blocks (10, 20.1-n), comprising the steps of providing a base HVAC device block (10); providing one or more add-on HVAC device block(s) (20.1-n) and stacking the base HVAC device block (10) and the one or more add-on HVAC device block(s) (10, 20.1-n), thereby mechanically connecting a connection interface (15A, 25A.1-n) of the first type to a connection interface (25B.1-n) of the second type of adjacent HVAC device blocks (10, 20.1-n).

A multi-zone vapor compression system (MZ-VCS) includes a compressor connected to a set of heat exchangers controlling environments in a set of zones. A supervisory controller includes a processor configured for optimizing a cost function subject to constraints on an operation of the MZ-VCS to produce a set of values of the thermal capacity requested for the set of heat exchangers to achieve setpoint temperatures in the corresponding zones. The supervisory controller is a model predictive controller for determining the set of control inputs using a model of the MZ-VCS including a linear relationship between the thermal capacity of each heat exchanger and the temperature in a corresponding zone controlled by the heat exchanger. A set of capacity controllers, wherein there is one capacity controller for each heat exchanger, such that each capacity controller is configured for controlling the corresponding heat exchanger to achieve the requested thermal capacity.

A heat exchange unit includes a heat exchanger, a first drain pan, and a second drain pan. The heat exchanger is configured to cause heat to be exchanged between air and refrigerant. The first drain pan is provided so as to face the heat exchanger and has an opening through which the air flows. The second drain pan is provided so as to face the heat exchanger and is attached to the first drain pan so as to form an L shape in side view together with the first drain pan. The heat exchange unit is installed in an installation state in which the first drain pan is located below the heat exchanger or in an installation state in which the second drain pan is located below the heat exchanger. The second drain pan includes a rib on a facing surface facing the heat exchanger.