摘要:
A two path flow, laminated-type heat exchanger for an automotive refrigerant circuit includes a plurality of heat transfer tubes, a plurality of fins, and a tank. The tank is divided into three chambers. The second and third chambers are in fluid communication with the heat transfer tubes, each of which tubes has an interior U-shaped flow path. A plurality of holes of different radii or one diamond-shaped hole or a wall dividing the first chamber into two sub-chambers may be provided between the first chamber and the second chamber. The fluid enters through an inlet orifice and flows into the first chamber. Imbalances in the fluid's mass-flow rate along the length of the tank are leveled as the fluid passes from the first chamber to the second chamber. The fluid now possessing a leveled mass-flow rate enters the heat transfer tubes. Thus, the fluid in every heat transfer tube is leveled. The fluid flowing within each of heat transfer tubes then is collected in the third chamber, and exits through the outlet orifice. Therefore, the surface temperature of the heat exchanger is balanced during operation.
摘要:
A heat exchanger includes a heat exchanger body having a heat exchanger core and header tanks, and a side tank provided at a side of the heat exchanger body for forming fluid introduction/discharge paths. The side tank comprises a first side tank forming plate provided at a heat exchanger body side, and a second side tank forming plate provided at an opposite side. At least one of the first and second side tank forming plates is divided into two parts in a thickness direction of the heat exchanger core. Drawn projecting portions for forming fluid paths from the side tank to the header tanks, and protruding portions for forming the fluid introduction/discharge paths in the side tank, may be formed without generation of cracks or too thin portions when the side tank forming. plates are processed. Consequently, a side tank having a desired structure may be formed, thereby achieving a high-performance heat exchanger.
摘要:
A multi-flow type heat exchanger includes a pair of headers and a plurality of heat transfer tubes interconnecting the headers. The flow direction of the heat exchange medium through the whole of the heat transfer tubes is only one direction. A flow division parameter &ggr; is defined as a ratio of a resistance parameter &bgr; of the heat transfer tubes to a resistance parameter &agr; of an entrance side header and is set to at least about 0.5. The flow division parameter is calculated, such that &ggr;=&bgr;/&agr;, where &bgr;=Lt/(Dt·n), and &agr;=Lh/Dh. The equation variables are defined as follows: Lt equals a length of each tube, Dt equals a hydraulic diameter of one tube, n equals a number of tubes, Lh equals a length of an entrance side header, and Dh equals a hydraulic diameter of the header. The flow division from the header to the tubes may be chosen at an optimum condition, and the heat exchanger may have superior performance.
摘要:
A heat exchanger comprising header pipes, flat tubes extending between the header pipes and fin units extending between the flat tubes is disclosed. The header pipes include a plurality of holes on one side thereof for accepting the flat tubes. On the opposite side of the header pipes is at least one slit in which a partition plate is inserted. During the formation of the header pipe, a pair of projections are formed on the ends of the slit. After the partition plate is inserted into the header pipe, the projections are bent until they engage the partition plate thereby fixedly securing the partition plate within the header pipe.
摘要:
This invention provides double-stranded (ds) RNA capable of suppressing the expression of STAT6 related to allergic diseases mediated by Th2-type cytokines via RNA interference and a pharmaceutical composition for prevention or treatment of allergic diseases comprising such dsRNA. Such dsRNA is a double-stranded RNA (dsRNA) molecule targeting mRNA of the STAT6 gene composed of (a) or (b): (a) a sense strand identical to a sequence having 15 to 50 continuous nucleotides in the STAT6 gene sequence represented by SEQ ID NO: 1 or 3 and an antisense strand comprising a nucleotide sequence complementary to the nucleotide sequence of the sense strand; or (b) a sense strand comprising a sequence derived from the sequence comprising 15 to 50 continuous nucleotides of the STAT6 gene sequence represented by SEQ ID NO: 1 or 3 by deletion, substitution, or addition of 1 or several nucleotides and capable of hybridizing to the STAT6 gene and an antisense strand comprising a nucleotide sequence complementary to the nucleotide sequence of the sense strand.
摘要翻译:本发明提供能够通过RNA干扰抑制由Th2型细胞因子介导的过敏性疾病的STAT6表达的双链(ds)RNA和用于预防或治疗包含这种dsRNA的过敏性疾病的药物组合物。 这种dsRNA是靶向由(a)或(b)组成的STAT6基因mRNA的双链RNA(dsRNA)分子:(a)与在STAT6基因序列中具有15至50个连续核苷酸的序列相同的有义链代表 通过SEQ ID NO:1或3和包含与有义链的核苷酸序列互补的核苷酸序列的反义链; 或(b)含有由SEQ ID NO:1或3表示的STAT6基因序列的15〜50个连续核苷酸的序列衍生的有义链,通过缺失,取代或添加1个或几个核苷酸并且能够杂交 到STAT6基因和包含与有义链的核苷酸序列互补的核苷酸序列的反义链。
摘要:
A method for manufacturing a fin for a heat exchanger includes the steps of forming an intermediate pre-formed plate, which has adjacent zigzag strips, by passing a flat plate material between a pair of first processing rollers, and forming a fin by passing the intermediate pre-formed plate between a pair of second processing rollers to bend the zigzag strips at a portion connecting adjacent zigzag strips. The fin includes a plurality of waving strips arranged adjacent to each other in the transverse direction, which are offset in the longitudinal direction. The adjacent waving strips are connected only between the flat portions of the waving strips at a connection length less than or equal to a plate thickness. The fin may be manufactured readily and inexpensively. A heat exchanger using the fin as an inner or outer fin may exhibit superior performance.
摘要:
A heat exchanger, such as a condenser, for use in a automobile air conditioning system includes a plurality of flat tubes for conducting the refrigerant and a plurality of corrugated outer fins fixedly sandwiched between the flat tubes. First and second header pipes are fixedly and hermetically connected to the flat tubes and, thereby, communicate with the interior of the tubes. A plurality of diagonally arranged projected stripes are formed on inner surfaces of the flat tubes. First portions of the projected stripes project from a lower inner surface of the flat tubes, and second portions of the projected stripes project from an upper inner surface of the flat tubes. The first and second portions of the projected stripes are in contact with one another at the points of intersection therebetween. Thereby, refrigerant flows through the flat tubes in a turbulent flow condition, so that the heat exchanging performance of the condenser increases while maintaining the internal pressure resistance strength of the tubes.
摘要:
An antenna device includes a base, a metal band having two opposite ends, a reel disposed within the base and having one end of the band connected thereto for winding the band thereon, the opposite end of the band being received in the base, and a guide receives the band outside the base for forming the band into substantially horizontal and vertical components, and for adjusting the length of the horizontal and vertical components of the band.
摘要:
A heat exchanger includes an aluminum member coated with a resin. The resin-coated aluminum member may be formed as a constituent part, e.g., a heat transfer member, a heater core, or the like, of the heat exchanger. In such heat exchangers, the aluminum member is connected to other resin-coated aluminum members by fusing the resin. Energy consumed during the connection of the aluminum members of the heat exchanger may be effectively reduced, and the manufacturing cost of the heat exchanger may be reduced, compared with that of heat exchangers made according to known methods that use a brazing filler metal.
摘要:
A heat exchanger unit has a case made of plastic or resin, and a heat exchanger is accommodated and fixed within the case. Within the case, first terminal ends of the inlet pipe and outlet pipe are connected to the heat exchanger, and second terminal ends of the pipes are fixed to a wall on the case by the external pipe connection portion. The external pipe connection portion has a flange portion formed integrally with the case itself on the wall, and a nut plate.