A heat exchanger includes a lamellar structure of a plurality of parallel heat exchange elements with an intermediate air gap between each pair of adjacent heat exchange elements. Along a longitudinal direction of the lamellar structure the heat exchange elements is interconnected in a top portion of the lamellar structure that forms an inlet channel through the heat exchange elements and in a bottom portion of the lamellar structure that forms an outlet channel through the heat exchange elements.

The heat exchange elements form parallel channels between the inlet and the outlet channels.

In the outlet channel, the heat exchanger includes a filler body, that is filling up a lower level of the outlet channel and forms a floor along the longitudinal direction of the lamellar structure.

Provided is a water vapor fireplace, including a fireplace body. The fireplace body is sleeved with a frame. A top cover is inserted in the frame, and a light-transmitting channel is installed on the top cover. A water tank is installed inside the fireplace body, and a mist outlet is installed on the water tank. A light-emitting diode (LED) light group is arranged below the light-transmitting channel. A fan is installed on the water tank, a mist maker is installed at an inner bottom of the water tank, and a heating element is installed on a side of the water tank. By adopting a positive temperature coefficient (PTC) heating plate, a safety factor is high, and no redness phenomenon on a heater is generated. Moreover, when an external temperature controller fails, a heating surface temperature of the PTC heating plate will not exceed a set constant temperature.

A gravity-style furnace subunit for a gas-induced draft furnace. A heat conduction tube configured to be located inside of a gas-induced draft furnace cabinet, the heat conduction tube being separated from a row of draft-induced heat conduction tubes inside the cabinet. A burner assembly having a burner tube located within the heat conduction tube through an inlet opening of the heat conduction tube. The burner assembly permits air flow through the inlet opening into the heat conduction tube. A pilot assembly located within the heat conduction tube and adjacent to the burner tube. A thermopile module having located adjacent to a flame outlet of the pilot assembly within the heat conduction tube. A gas valve configured to control gas flow to the burner assembly, the gas valve electrically coupled to the thermopile module and to actuate gas flow there-through when the thermopile module generates a predefined voltage difference.

A coupling to connect a primary heat exchanger to a condensing heat exchanger of a furnace includes a coupling box extending between a primary heat exchanger and a condensing heat exchanger. The coupling box defines a flow path for flue gas between a primary heat exchanger outlet and a condensing heat exchanger inlet. A tube sheet is located at a distance from the tube sheet in the coupling box. The liner and the tube sheet define an insulating liner space therebetween reducing condensation on the liner.

A heating apparatus can have a sealed combustion chamber, a burner, and various air channels to direct air into the sealed combustion chamber and to provide heated air to the desired area or environment such as an interior room. A channel can direct a flow of air along a face of the sealed combustion chamber to cool the face. The channel can be within or outside of the sealed combustion chamber. Alternatively, or in addition, the heating apparatus can be capable of operating as a direct vent device or as a vent free device.

An example of an apparatus is provided. The apparatus includes a refrigerant inlet to receive a refrigerant as a vapor. The apparatus also includes a heat exchanger to absorb heat from the vapor to form a liquid. The apparatus further includes a refrigerant outlet to release the liquid. In addition, the apparatus includes a fluid inlet to receive air proximate to the cold portion of the heat exchanger. The heat exchanger separates the air from the refrigerant. Furthermore, the apparatus includes a first fluid outlet proximate to the warm portion of the heat exchanger. The apparatus also includes a second fluid outlet proximate to the hot portion of the heat exchanger. The air flows in an opposite direction than the refrigerant, and the heat exchanger provides thermal contact between the air and the refrigerant.

The invention relates to a heating device for heating the interior of a motor vehicle, comprising a plurality of heating modules arranged in at least one heating unit, each heating module comprising at least one heating resistor, at least one heat exchanger configured for delivering heat generated by the heating resistor to an airflow, and a rectangular frame surrounding the at least one heating resistor and the at least one heat exchanger, each frame having openings in opposed frame legs, wherein in the at least one heating unit the frame legs, comprising openings, of adjacent heating modules face one another and electrical connection elements reaching through the openings electrically connect the heating modules to one another.

A fluid heater (100) includes at least one heating element (10) and at least one casing (20). The casing (20) includes a first and a second portion (20a) and (20b), a partition groove (22), an inlet and an outlet (24) and (26). The first and second portions (20a) and (20b) are assembled to define an enclosure receiving the heating element (10). The partition groove (22) divides casing (20) into a first chamber (20d) receiving fluid from the inlet (24) and defining a first pass A and a second chamber (20e) delivering fluid to the outlet (26) and defining a second, return pass B. The casing (20) is formed with an intermediate connecting portion (28) to define an U-turn trajectory C forming fluid communication between the first and the second chambers (20d) and (20e) along plane of heating element (10) and extending in longitudinal direction along lateral side of heating element (10).

A fluid heater (100) includes at least one heating element (10) and at least one casing (20). The casing (20) includes a first and a second portion (20a) and (20b), a partition groove (22), an inlet and an outlet (24) and (26). The first and second portions (20a) and (20b) are assembled to define an enclosure receiving the heating element (10). The partition groove (22) divides casing (20) into a first chamber (20d) receiving fluid from the inlet (24) and defining a first pass A and a second chamber (20e) delivering fluid to the outlet (26) and defining a second, return pass B. The casing (20) is formed with an intermediate connecting portion (28) to define an U-turn trajectory C forming fluid communication between the first and the second chambers (20d) and (20e) along plane of heating element (10) and extending in longitudinal direction along lateral side of heating element (10).

A furnace with a baffle assembly including at least one horizontal gap, and a heating, ventilation, and/or air conditioning (HVAC) system incorporating the same are provided. The furnace includes a furnace heat exchanger, a baffle assembly, and a fan. The baffle assembly is disposed adjacent to the furnace heat exchanger. The fan is in airflow communication with the furnace heat exchanger. The baffle assembly may include a first side and a second side. Each of the first side and the second side may respectively include a first section and a second section. A horizontal gap may be disposed between the first section and the second section (e.g., on either or both of the first side and the second side). The horizontal gap(s) may increase the efficiency of the furnace and/or the HVAC system.