Abrégé

In order to correctly measure a temperature of a working fluid flowing through an outlet/inlet of a heat exchanger body, a flow adjustment ring is disposed within at least either one of a high-temperature inlet pipe and a low-temperature inlet pipe of the heat exchanger body. In this manner, a core region in which velocity and temperature of the working fluid becomes approximately constant is formed on a downstream side of the flow adjustment ring. A temperature sensor is provided in such a manner that a sensing point is arranged in this core region.

Classes IPC  ?

• F25B 49/02 - Disposition ou montage des dispositifs de commande ou de sécurité pour machines, installations ou systèmes du type à compression
• F28F 3/04 - Eléments ou leurs ensembles avec moyens pour augmenter la surface de transfert de chaleur, p.ex. avec des ailettes, avec des évidements, avec des ondulations les moyens faisant partie intégrante de l'élément
• F28F 9/00 - Carters; Boîtes de distribution; Supports auxiliaires pour les éléments; Eléments auxiliaires dans les carters

Abrégé

This heat exchanger is provided with: a channel layer laminate formed by alternately stacking a plurality of high-temperature channel layers in which a channel for a high-temperature fluid is provided and a plurality of low-temperature channel layers in which a channel for a low-temperature fluid is provided; a heat exchanger body which has an inlet port and an outlet port for the high-temperature fluid and an inlet port and an outlet port for the low-temperature fluid; and a control substrate which is fixed in a direction in which the heat exchanger body is stacked, and which has at least a plurality of temperature sensors mounted thereto so as to be inserted in the direction in which the heat exchanger body is stacked such that the sensing points of the temperature sensors are arranged in the respective vicinities of the inlet port and the outlet port for the high-temperature fluid and of the inlet port and the outlet port for the low-temperature fluid.

Classes IPC  ?

• G01K 1/14 - Supports; Dispositifs de fixation; Dispositions pour le montage de thermomètres en des endroits particuliers
• F28F 3/04 - Eléments ou leurs ensembles avec moyens pour augmenter la surface de transfert de chaleur, p.ex. avec des ailettes, avec des évidements, avec des ondulations les moyens faisant partie intégrante de l'élément
• F28F 27/00 - Commandes ou dispositifs de sécurité spécialement adaptés pour les appareils d'échange ou de transfert de chaleur
• G01K 13/02 - Thermomètres spécialement adaptés à des fins spécifiques pour mesurer la température de fluides en mouvement ou de matériaux granulaires capables de s'écouler

Abrégé

A method of controlling an air conditioner includes a step of controlling an opening degree of the expansion valve and/or the number of rotations of an outdoor fan of the outdoor heat exchanger such that the difference Tx (= Te - Ti) between the temperature Te of the outdoor heat exchanger and the temperature Ti of the indoor heat exchanger is within a predetermined range, in a cooling mode in a low outside air temperature environment. Specifically, the opening degree of the expansion valve is adjusted, with the number of rotations of the outdoor fan being reduced to be smaller than that in a normal cooling mode, and then, the number of rotations of the outdoor fan is adjusted with the opening degree of the expansion valve being fixed, thereby controlling the difference Tx to be substantially constant.

Classes IPC  ?

• F25B 49/02 - Disposition ou montage des dispositifs de commande ou de sécurité pour machines, installations ou systèmes du type à compression