A heat exchanger unit, especially for a vehicle heater, includes a heat exchanger housing (12) with a heat transfer medium inlet opening (22) and with a heat transfer medium outlet opening (24). At least one connecting branch (26, 28), is inserted or can be inserted into the heat transfer medium inlet opening (22) and the heat transfer medium outlet opening (24). At least one housing locking element meshing recess (34, 36, 38, 40) is provided in association with the at least one connecting branch (26, 28) in the heat exchanger housing (12). A locking element (44), locking the connecting branch (26, 28) on the heat exchanger housing (12), is positioned or can be positioned such that the locking element (44) meshes with the at least one housing locking element meshing recess (34, 36, 38, 40) and with at least one connecting branch locking element meshing recess (42).

A heating apparatus comprising a tank having a tank inlet, a tank outlet, a heat exchanger inlet and heat exchanger outlet. A heat exchanger is located in the tank and comprises a hollow body having a mouth coupled to the heat exchanger inlet and a flue outlet coupled to the heat exchanger outlet. A burner device has a burner head that is located at least partly located in the mouth inside said hollow body.

A heating apparatus comprising a tank having a tank inlet, a tank outlet, a heat exchanger inlet and heat exchanger outlet. A heat exchanger is located in the tank and comprises a hollow body having a mouth coupled to the heat exchanger inlet and a flue outlet coupled to the heat exchanger outlet. A burner device has a burner head that is located at least partly located in the mouth inside said hollow body.

The present disclosure provides a dual cooling water heater including a main body on which a substrate is seated, a flow path forming part connected to the main body and having first and second flow paths provided on one surface thereof, a first heating element disposed on the other surface of the flow path forming part and configured to heat the first flow path, a second heating element disposed on the other surface of the flow path forming part and configured to heat the second flow path, and a control unit configured to control a temperature and a flow rate of cooling water moving through the first flow path and a temperature and a flow rate of cooling water moving through the second flow path by controlling a temperature of the first heating element and a temperature of the second heating element.

Example embodiments relate to a device for heating a medium and air. A heating source generates thermal energy by the combustion of a fuel-air-mixture. A heat exchanger serves to heat air passed along an exterior side, has an interior space into which flue gas generated during combustion of the fuel-air-mixture flows, has a fin structure on the exterior side, and transmits thermal energy to the medium pipe. The electric heating element generates thermal energy, the heat exchanger having integral structures for accommodating the electric heating element and the medium pipe. The medium pipe and the electric heating element are guided around the interior space of the heat exchanger.

A cab heating system for a vehicle comprising a turbine engine, a heat exchanger, and a duct. The turbine engine generates exhaust containing waste heat. The heat exchanger comprises a first portion, a second portion, and first and second lines for carrying auxiliary working fluid between the first and second portions. The duct is operatively connected to carry exhaust from the turbine engine to the first portion of the heat exchanger. The first portion of the heat exchanger transfers waste heat of the exhaust generated by the turbine engine to the auxiliary working fluid. The first line carries the auxiliary working fluid to the second portion of the heat exchanger. The heat exchanger extracts heat from the auxiliary working fluid. The second line carries the auxiliary working fluid to the first portion of the heat exchanger.

A vehicular heat management system includes: a refrigerant circuit; a first heat medium circuit in which a heat medium circulates and exchanges heat with a low-pressure side refrigerant of the refrigerant circuit; a second heat medium circuit in which a heat medium circulates and exchanges heat with a high-pressure side refrigerant of the refrigerant circuit; and a switching device configured to switch a mode between a communicating mode in which the first heat medium circuit and the second heat medium circuit are coupled and a non-communicating mode in which the first heat medium circuit and the second heat medium circuit are not coupled on the basis of a temperature of the heat medium in the first heat medium circuit.

An evaporator arrangement (1) for evaporating liquid fuel for a mobile fuel-operated heating device, comprising: an evaporator unit (5) for distributing and evaporating liquid fuel; and at least one fuel supply line (6) for delivering liquid fuel to the evaporator unit (5). The evaporator unit (5) has at least one first section (B1) made of a metal wire mesh (8).

A fuel-operated vehicle heater includes a burner area (12) with a combustion chamber (14); a fuel pump (24); and a combustion air blower (28). A pressure sensor (38) detects a feed back pressure. An actuating unit (36) actuates the fuel pump (24) with a predefined value of a pump operating variable, and actuates the combustion air blower with a predefined value of a blower operating variable. A heater process includes detecting the feed back pressure in case of a feed operating state set during the combustion operation and comparing the detected feed back pressure (P.sub.e) with an expected feed back pressure (P.sub.E) for the set feed operating state. If the detected feed back pressure deviates from the expected feed back pressure the pump operating variable is changed such that the feed back pressure changes toward the expected feed pressure and/or essentially corresponds to the expected feed back pressure.

A combustion air blower, especially side channel blower, for a fuel-operated vehicle heater, includes a blower housing (38). An air flow space (44), through which combustion air being fed can flow, is formed in the blower housing (38). Air flowing over an inlet area (55) into the air flow space (44) flows to a feed area enclosing a feed wheel (48). At least one hydrocarbon storage element (70, 88) is formed in the air flow space (44), for storing gaseous hydrocarbon present in the air flow space (44).