Abstract:
A heat exchanger, wherein the upstream side end of a fin (16) in ventilating direction is projected from the upstream side end of a tube (14) in ventilating direction within the range not exceeding the end face of tanks (2) and (3) in ventilating direction so as to set the tube (14) at a position recessed to the downstream side in ventilating direction from the fin (16), and the downstream side end of the fin (16) in ventilating direction is recessed to the upstream side of the tube (15) in ventilating direction from the downstream side end of the tube (15) in ventilating direction, whereby, while a requirement for a reduction in width of an evaporator in ventilating direction is satisfied, condensate produced on the surface of the tube and fin is efficiently eliminated downward so as to suppress the condensate from spattering to the downstream side, and prevent the corrosion of the tube from being advanced due to adhesion of dirt to the upstream side of the tube in ventilating direction.
Abstract:
The present invention relates to a cooling system and comprises a compressor for compressing to the high temperature high pressure state that vapor refrigerant is apt to liquidize; a condenser for receiving vapor refrigerant that gets out of the compressor and making to liquid refrigerant; a liquid receiver for receiving liquid refrigerant which condensed at the condenser and storing for a time; a first expansion valve for transferring to the first pipe liquid refrigerant that is stored at the liquid receiver and depressurizing to evaporable state; an evaporator for circulating vapor refrigerant to the compressor and air-conditioning while absorbing a latent heat from surroundings by receiving liquid refrigerant that is depressurized at the first expansion valve and evaporating to vapor refrigerant; a second expansion valve for transferring to the second pipe liquid refrigerant that is stored at the liquid receiver and depressurizing to evaporable state; a cooling water of cooler for receiving liquid refrigerant that is depressurized at said second expansion valve, evaporating to vapor refrigerant and cooling cooling water to cool the condenser while circulating to the compressor; and a pump for supplying cooling water that cools the condenser to cooling water of cooler from the condenser and circulating to the condenser cooling water that is cooled at said cooling water of cooler, thus the invention can operate the cooling system for circulating cooling water by cooling again it even without a cooling tower.
Abstract:
Process for preventing or limiting the corrosion of metals due to contact with solutions containing lithium bromide, comprising causing Sn ions to be present in the solution.
Abstract:
Corrosion of steel surfaces in a heat pump is inhibited by adding a rare earth metal salt to the heat pump's ammonia/water working fluid. In preferred embodiments, the rare earth metal salt includes cerium, and the steel surfaces are cerated to enhance the corrosion-inhibiting effects.
Abstract:
Pipes (40) of a predetermined length are filled with a nitrogen gas (4a). Cross-sectionally hat-shaped plugs (50) comprising a brazing filler metal are press fitted in open ends of joint portions (42, 42) at both ends of the pipes (40) so as to seal the pipes (40), whereby the plugs (50) are fixed to the joint portions (42, 42). One side portion of a connecting piece (60) is then inserted into the joint portion (42) of one pipe (40) by breaking the relative plug (50) thereby, while the other side portion of the connecting piece (60) is inserted into the joint portion (42) of the other pipe (40) by breaking the relative plug (50) thereby. The plugs (50) are then melted to braze the joint portions (42) of the pipes (40) and the connecting piece (60) to each other.
Abstract:
A device for introducing a fluid into a refrigeration or air conditioning system comprising a container containing the fluid to be dispensed and a connector for connecting the barrel to facilitate injection of the fluid into suitable ports fitted to the refrigeration or air conditioning system.
Abstract:
The disclosure relates to a working fluid for use in a compression refrigeration, air conditioning or heat pump system, comprising a refrigerant comprising a fluoro-olefin, and a lubricant which comprises a mixture of a polyol ester and a polyoxyalkylene glycol, said polyol ester being present in an amount of at least 50% by weight based on the total weight of the polyol ester and the polyoxyalkylene glycol. Novel lubricants are also described and claimed.
Abstract:
L'invention concerne un échangeur de chaleur, en particulier évaporateur pour circuit de climatisation d'un véhicule, ledit échangeur permettant un échange de chaleur entre un premier et un second fluides et présentant des surfaces destinées à venir en contact avec l'un desdits fluides, lesdites surfaces étant formées d'aluminium et/ou d'alliage d'aluminium et revêtues d'une couche d'alumine et d'une couche dite de renfort renforçant la protection naturelle de l'aluminium, ladite couche de renfort comprenant une part de substances organiques et une part de substances minérales, ladite part de substances organiques comprenant au moins un polymère et ladite part de substances minérales comprenant au moins une substance apte à réagir avec l'aluminium pour former un matériau anticorrosion. L'invention concerne aussi un procédé de fabrication d'un échangeur.