Embodiments for diagnosing a humidity sensor are provided. One example method comprises, responsive to a humidity sensor test cycle, pumping air conditioning and windshield washer gas flows past a humidity sensor, and indicating humidity sensor degradation based on a response of the humidity sensor to the air conditioning and windshield washer gas flows. In this way, degradation of the humidity sensor may be indicated if the humidity sensed by the humidity sensor does not change responsive to the humidity sensor test cycle being initiated.

An evaporator is used in an inclined state in which a first header tank is located on the upper side in relation to a second header tank. The leeward and windward header sections of the first header tank have compartments with which the furthest tube groups of leeward and windward tube rows communicate. The compartments are divided into upper and lower spaces by split flow control sections, and the upper and lower spaces communicate through refrigerant passage holes formed in the split flow control sections. The total cross sectional area of the refrigerant passage holes of the split flow control section of the compartment located on the lower side in the inclined state is smaller than the total cross sectional area of the refrigerant passage holes of the split flow control section of the compartment located on the upper side in the inclined state.

In order to provide a cold storage medium container that can be smoothly and reliably filled with a cold storage medium to thereby increase productivity. In a cold storage medium container 5, a body of the container 5 constituted of a pair of container members 10 and 12, and the body has an inner fin 11 therein and is filled with the cold storage medium through a cold storage medium filling opening 20 at an end of the body therein. Furthermore, in the cold storage medium container, an engagement portion 13 projects toward inside of the body to engage a part of a corrugated end surface at each end of the inner fin 11, to thereby position the inner fin 11 in the body, and a gap is disposed between the end surface at each end of the positioned inner fin 11 and an inner wall of the body.

In an evaporator for a vehicular air conditioner, the core width W is uniform over the entire region in the left-right direction. Further, the widths of all air-passing spaces in the left-right direction are equal to one another, the tube heights Ht of all refrigerant flow tubes are equal to one another, and the fin heights HF of all corrugated fins are equal to one another. The core width W, the tube pitch Tp (the distance between the thicknesswise centers of the refrigerant flow tubes located on the left and right sides of each air-passing space), the tube height Ht, and the fin height Hf are such that W=27 to 32 mm, Tp=4.3 to 5.5 mm, Ht=1.3 to 1.5 mm, Hf=3.0 to 4.0 mm, and Ht/Hf=0.325 to 0.500.

An evaporator includes a cool storage material container. The cool storage material container contains a cool storage material and is disposed in a second part of the spaces. The cool storage material container includes a container main body portion joined to the refrigerant flow tubes. The outward projecting portion extends from an upper end of the leeward edge or windward edge of the container main body portion. The outward projecting portion has an expansion portion projecting from the container main body portion and projecting thickness of the expansion portion is greater than a thickness of the container main body portion. The expansion portion is located outward of the fins. At least one of left and right side walls of the expansion portion is so constructed to deform when an internal pressure in the cool storage material container increases beyond a predetermined pressure.

Provided are a heat exchanger equipped with a cold reserving part and a manufacturing method thereof, equipped with a cold reserving part, in which since a cold reserving material charging part is formed at a portion at which an inlet and outlet member is formed, an additionally protruding part to inject the cold reserving material is not required, such that the heat exchanger may be miniaturized and may more rapidly and effectively absorb cold air to increase a cold reserving effect, and a manufacturing method of a heat exchanger equipped with a cold reserving part which forms the cold reserving material charging part to charge the cold reserving material after coating the heat exchanger to block a coating solution from introducing into the heat exchanger, thereby preventing the heat exchanger from corroding due to the coating solution to increase durability and more increase manufacturing performance.

Abstract: Heat exchanger, in particular condenser, comprises two parallel end closing plates (1, 2) having made a coolant inlet and outlet and at least one inlet and an outlet of the refrigerant. A heat exchange unit is provided between the closing plates (1, 2) and at least one coolant compartment and at least one refrigerant compartment, separated by an inner plate (5). The coolant compartments and, refrigerant compartments are arranged alternately and connected such that they form together with said inlets and outlets separated hydraulic circuits for the coolant and refrigerant and a turbulator panel (3, 4) is arranged in each of the compartments (3, 4). The turbulator panels (3) of the refrigerant circuit comprise on their surface first disturbing elements (9) the shape of which is matched to the physical properties of the gaseous refrigerant, and which determine the height of the turbulator panel of the refrigerant circuit, while the turbulator panels (4) of the coolant circuit comprise on their surface second disturbing elements (10) the shape of which is matched to the physical properties of the liquid coolant which determine the height of the turbulator panel of the coolant circuit, wherein the shape of the first disturbing elements (9) is different from the shape of the second disturbing elements (10). The shape of the turbulator panels (3, 4) is matched to the independent optimal managing, slowing down and disturbing of the refrigerant and the coolant, while ensuring a low pressure drop of their flow to achieve a high heat exchange coefficient.

A brazed heat exchanger, for example a heat exchanger to be used in an air-conditioning system, preferably as a condenser, includes flat tubes extending between a pair of header tubes and fins arranged between the flat tubes. The components are produced from aluminum alloys, and are brazed together using an AlSi braze alloy. The aluminum alloys have a zinc content of no greater than 0.5% before brazing, and zinc from the aluminum alloys diffuses into the braze joints to result in braze joints having an average zinc content of no greater than 0.1%.

A heat exchanger having multiple segments is described. The heat exchanger includes a pair of manifolds, having tubes extending therein. Further, a first blocking element is provided in a manifold to divide the tubes into a first set of tubes and a second set of tubes having a fluid communication with each other. Further, a second blocking element is provided in the manifold, corresponding to the second set of tubes, to further divide the second set of tubes into a first segment of tubes and a second segment of tubes. Further, an inlet is provided on the manifold to introduce the heat exchange fluid to the first set of tubes. Further, a plurality of outlets provided on the manifold to receive the heat exchange fluid from the second set of tubes.

A cold storage heat exchanger has refrigerant pipes and a cold storage material. Each of the refrigerant pipes has a refrigerant passage therein. The refrigerant pipes are arranged so as to be distanced from each other with clearances therebetween. The cold storage material is disposed in at least one of the clearances. At least another one of the clearances provides an air passage. The heat storage material is disposed in at least two of the clearances arranged adjacent to each other.