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公开(公告)号：JPH02140569A
公开(公告)日：1990-05-30
申请号：JP26454588
申请日：1988-10-20
Inventor： KIDO OSAO , KASE HIROAKI , NAKAMURA TAKASHI , AOKI AKIRA , AOYANAGI OSAMU
IPC: F25B39/00
Abstract: PURPOSE:To uniformly branch refrigerant by connecting a plurality of branch tubes near both longitudinal ends of a hollow member to collectively connect an inlet tube at the reverse side of the connection side to the member of the branch tube, and providing a plurality of outlet tubes to the outer side face of the member. CONSTITUTION:After heat exchanging refrigerant R is fed to the inlet tube 4 of a refrigerant branch unit 1, it is branched into refrigerant RH of an upper branch tube 3H and refrigerant RL of a lower branch tube 3L, the refrigerant RH is fed from an upper end 2H, and the refrigerant RL is fed from a lower end 2L into a hollow member 2. The refrigerant RL flows to an outlet tube 5 connected to the outer side face 25 of the member 2 while rising in the member 2. The refrigerant RL mainly flows into a lower outlet tube 5L due to its gravity G. On the contrary, since the refrigerant RH is introduced from the upper end 2H of the member 2, it is mainly fed to an upper outlet tube 5H. As a result, the refrigerant R can be uniformly branched to the whole tubes 5 provided in a plurality of stages, thereby outputting heat exchanging amount at the maximum limit.
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公开(公告)号：JPH02115668A
公开(公告)日：1990-04-27
申请号：JP26849888
申请日：1988-10-25
Inventor： AOYANAGI OSAMU , AOKI AKIRA , KIDO OSAO , KASE HIROAKI , NAKAMURA TAKASHI
Abstract: PURPOSE:To prevent refrigerant output from a heat exchanger (evaporator) from laminarly flowing and to allow the refrigerant to flow in gas and liquid mixture state by reducing the diameter of a heat transfer tube immediately before an outlet side distributor to provide a throttle. CONSTITUTION:Refrigerant fed from the side A of the outlet of a heat exchanger is fed through a throttle 3, combined in an outlet side distributor 2 (B), and guided to the side C. The refrigerant fed from the side A is caused by pressure loss by means of throttling effect of the throttle 3. When the refrigerants of gas state with liquid state are compared in terms of pressure loss, that of the gas state having fast volume velocity is much larger than that of the liquid state. Thus, even if a drift is generated, the loss of the passage containing more gas state is large. Thus, the gas state is fed to more passages. Thus, the refrigerant is distributed substantially uniformly.
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公开(公告)号：JPH0297899A
公开(公告)日：1990-04-10
申请号：JP24822688
申请日：1988-09-30
Applicant: MATSUSHITA REFRIGERATION
Inventor： YAMADA ARITAKA , KIDO OSAO , IDE SHINICHI
Abstract: PURPOSE:To prevent the deterioration of heat transfer performance due to the biased flow of refrigerant by a method wherein a hollow spiral plate, provided with a dam at the end thereof, is inserted into a heat transfer tube positioned at upstream side connected to the inlet port of the inflow tube of a flow distributor. CONSTITUTION:A hollow spiral plate 15, provided with a dam 21 at the end thereof, is inserted into a inflow heat transfer tube 14. According to this constitution, liquid phase B2 among the flows of refrigerant B, flowing through the inflow heat transfer tube 14 and separated into gas phase and liquid phase, is made to flow spirally along the inner surface of the heat transfer tube 14 by the hollow spiral plate 15 to prevent the flow of the same biased to the trough of the spiral part while the gas phase B1 of the refrigerant R is made to flow through the hollow part of the spiral plate 15 to accelerate it. The mixing of the gas phase with the liquid phase B2 on the inner surface of the tube is promoted by the extracting effect of the gas phase B1 accelerated by the dam 21 to restrain the adhesion of the refrigerant B to the wall surface of a branching section 26 and prevent the excessive flow of the liquid phase B2, heavier than the gas phase B1, into a lower outflow tube 24b by the affection of a gravity whereby the uniform distribution of the flow may be effected. On the other hand, the inner surface of the tube is covered at all times by the liquid phase B2, in which boiling heat transfer is generated, whereby the heat transfer coefficient of a heat exchanger may be improved.
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公开(公告)号：JPH01155162A
公开(公告)日：1989-06-19
申请号：JP31458187
申请日：1987-12-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , IDE SHINICHI
Abstract: PURPOSE: To ensure a stabilized evaporation capacity by an arrangement wherein a superconductor fixed to the inner wall face exhibits diamagnetism when flow rate of refrigerant is unbalanced among respective circuits in an evaporator to move an orifice through repellence acting on the orifice and to correct flow rate of refrigerant by regulating the circuits thus keeping the temperature of refrigerant flowing into a combiner at a substantially constant level. CONSTITUTION: A significant temperature difference appears between refrigerants B1 and B2 when the flow rate thereof is unbalanced. When flow rate of B1 is higher, a sufficient superheating can not be ensured for the B1 at the circuit outlet on the evaporator 14a side. Since temperature of the B1 flowing into the flow-in port 9a of a refrigerant combiner 8 lowers, a superconductor 13a exhibits diamagnetism to move an orifice 11 toward a flow-in port 9b through repellence F acting on a magnetic body 12a thus widening the channel on the B2 side and reducing difference of flow rate between B1 and B2. Since flow rate of B1 and B2 flowing through two circuits 14a, 14b of the evaporator 14 is balanced, evaporation capacity is stabilized.
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公开(公告)号：JPS63163788A
公开(公告)日：1988-07-07
申请号：JP31234486
申请日：1986-12-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , FUJIMOTO SHINJI , KOMA HACHIRO , IDE SHINICHI
Abstract: PURPOSE:To increase the heat transfer coefficient of a fin to an air flow, by raising louvers, which are continuous in the direction of an air flow, from both sides of a fin alternately on each side, by reversing the inclination of louvers to the direction of an air flow from one side of a fin to another, and by determining the inclination of them at a specified angle. CONSTITUTION:Louvers 5 are provided on both of a fin 4, alternately on each side in the direction of an air flow B. The height HL of a raised face 6 raised from the surface of a fin 4 is obtained by keeping the raised face 6 at the inclined angle thetaof 30-35 deg. to the direction of an air flow B. The inclination of a raised face 6a on the upper surface of a fin 4 to the direction of an air flow B is reversed from that of a raised face 6b on the under surface of a fin 4. With such an arrangement the boundary layer of temperature in the air flow produced on the raised faces 6 does not leave a trail long to the downstream side, because the air flow B flows staggeredly among the raised faces 6 in regard to the air flow B which flows through the inside of a fin 4 and a heating medium which flows through the inside of a flat pipe. The heat transfer coefficient of a fin 4 to the air flow B can be kept high also from the upstream side to the downstream side of high air velocity zone; as a result, the heat transferring capacity of a heat exchanger can be increased.
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Patent Agency Ranking
公开(公告)号：JPS63150586A
公开(公告)日：1988-06-23
申请号：JP29955086
申请日：1986-12-16
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , FUJIMOTO SHINJI , KOMA HACHIRO , IDE SHINICHI
Abstract: PURPOSE:To improve heat transfer performance by a method wherein bridge- shaped slit pieces are out and raised from a fin surface, and their out and raised surfaces are inclined to an air flow direction, and the inclination direction of the cut and raised surfaces and the stepwise inclination direction of cut and raised heights are reversed to each other. CONSTITUTION:Bridge-shaped slit pieces 5 are cut and raised from a fin 4 surface in three steps and cut and raised heights Hs are installed stepwise with inclination to an air flow direction B. Cut and raised surfaces 6 are also inclined to the direction B. The inclination direction of the cut and raised surfaces 6 and the stepwise inclination direction the cut and raised heights Hs are reversed to each other. As an initial size, the cut and raised height Hs of the slit 5 is made to be one third of a fin pitch Pf. Further, a relation among a inclination angle theta between the surface 6 and the direction B, the fin pitch Pf, and a slit width Ws is determined as theta lam (Pf/Ws/15). Thereby, the temp. boundary layer of the air flow B is completely divided into parts, and a heat transfer rate between the fins 4 and the air flow B from the upstream side to the downstream side is maintained at an extremely high level, and heat transfer performance can be improved.
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公开(公告)号：JPS6365299A
公开(公告)日：1988-03-23
申请号：JP20991886
申请日：1986-09-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , FUJIMOTO SHINJI , TANNO SATOSHI , IDE SHINICHI
Abstract: PURPOSE:To obtain a heat exchanger prominent in heat transfer performance, by a method wherein slit pieces 5, cut and raised so that the leading edges thereof are opposed substantially to air stream and the cut-and-raised surfaces thereof become parallel substantially to the air stream, are provided on the surface of a fin while the slit pieces are provided with bent pieces, formed by bending the vicinity of the trailing edges of the cut-and-raised surfaces. CONSTITUTION:Heat exchange is effected between airflow B, flowing between fins 4, and heat medium, flowing through the inside of a flat tube 1. In this case, the fins 4 are divided into small pieces in the direction of the airflow B by slit pieces 5, therefore, the growth of the temperature boundary layer (d) of the airflow B, which is generated on the surface of the fins 4, is restricted. Further, bent pieces 6 are provided near the trailing edges of cut-and-raised pieces 5'' of respective slit pieces 5, therefore, the airflow B, passing the surfaces of the cut-and-raised surfaces 5'' while forming the temperature boundary layers (d), collides against the bent pieces 6 whereby the airflow B is separated from the bent pieces 6 in the rear stream thereof and eddies are generated, therefore, the temperature boundary layer (d) of the airflow B is divided into small pieces perfectly and simultaneously. Furthermore, the airflow B, separated by the bent pieces 6, adheres again to the slit pieces 5 in the downstream, therefore, a very high heat transfer rate may be obtained.
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公开(公告)号：JPS62178896A
公开(公告)日：1987-08-05
申请号：JP2147686
申请日：1986-02-03
Applicant: MATSUSHITA REFRIGERATION , MATSUSHITA ELECTRIC IND CO LTD
Inventor： YONEDA HIROSHI , KIDO OSAO , IKOMA MITSUHIRO , YAMAMOTO YOSHIAKI
Abstract: PURPOSE:To improve the evaporation heat transfer and the heat transfer performance of the heat transfer pipe by superimposing a flat flowpath member provided with a plurality of wide slits forming a part of coolant flowpaths at portions corresponding to a plurality of wide slits, on both surfaces of a flat flowpath member provided with wide slits forming a part of coolant flowpaths, and further integrally laminating outer wall member on both surfaces. CONSTITUTION:A plurality of slits 13 forming a part of coolant flowpaths are provided in paralleled in a flowpath member 12. On both surfaces of the flowpath member 12, a flowpath member 14, provided with a plurality of narrow slits 15 forming a part of coolant flowpath at portions corresponding to wide slits 13, is superimposed. A liquid coolant 19 is held to circulates at respective corner portions (minute clearances) of the coolant flowpaths formed by slits 13 and 15 of the flowpath members 12 and 14, respectively by the effect of the surface tension of the liquid coolant 19. Accordingly, the liquid coolant 19 is led to a relatively central portion of the flowpath, and hence the wet area with respect to the heat transfer surface increases and the evaporation heat transfer is improved and the heat transfer performance is remarkably improved.
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公开(公告)号：JPS62172193A
公开(公告)日：1987-07-29
申请号：JP1516786
申请日：1986-01-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI
IPC: F28F1/30
Abstract: PURPOSE:To increase boundary layer leading edge effect and obtain a heat exchanger prominent in heat exchanging capacity by providing a slit piece, slanted with respect to the direction of airflow, on the surface of a fin. CONSTITUTION:A slit piece 5, whose leading edge 5a and leg 5b are slanted with respect to the direction of airflow B, is provided on the surface of a fin 4. According to this method, high boundary layer leading edge effect and turbulent flow promoting effect may be increased, the heat transfer rate of the airflow B and the fin 4 may be improved without increasing a ventilating resistance, therefore, heat exchanging capacity may be improved even in the heat exchanger, long in the direction of the airflow B, without deteriorating the heat transfer rate even in the downstream side thereof.
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公开(公告)号：JPS62147288A
公开(公告)日：1987-07-01
申请号：JP28862885
申请日：1985-12-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIDO OSAO , YONEDA HIROSHI
Abstract: PURPOSE:To improve the fin efficiency of a heat exchanger by a method wherein the bent section of a corrugated fin, contacting with a flat tube, is provided with a recessed section. CONSTITUTION:A fin 4 is provided between mutual flat tubes 1 so as to have a predetermined space in a corrugated and is brazed to the flat tube 1 at the bent section of the fin to fix the same. The bent section 4' is formed of protruded sections 4's and a recessed section 4'b and the protruded sections 4'a are contacted with the flat tube 1 while brazing agent 3 is adhered to clearances between the flat tube 1 and the bent section 4'. The bent section 4' is contacted with the flat tube 1 in the condition of recessed and protruded, therefore, a contacting area is increased and the adhering amount of the brazing agent 3 is increased whereby the entering and outgoing of heat between the flat tube 1 and the fin 4 may not be bothered and the fin efficiency of the heat exchanger may be increased while heat resistance may be reduced.
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