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1. 发明专利

JPH04155191A LAMINATION TYPE HEAT EXCHANGER 失效
公开(公告)号：JPH04155191A
公开(公告)日：1992-05-28
申请号：JP27632390
申请日：1990-10-17
申请人： HITACHI LTD
发明人： KUDO MITSUO , FUKUSHIMA TOSHIHIKO , SAWAHATA TAKATOMO , AMO KIYOSHI
IPC分类号： F28F3/06 , F25B39/02 , F28D1/03 , F28D9/00 , F28F3/02
摘要： PURPOSE:To secure effective heat transfer area and improve cooling capacity by a method wherein a predetermined gap is provided between the outer peripheral end of the opposite side of a tank in an U-shape flow passage and the end of inner fin of the opposite side of the tank. CONSTITUTION:A predetermined gap S is provided between the end 22 of the opposite side of an inner fin 3, arranged in a heat transfer tube, and the end 22d of an outer periphery at the opposite side of the tank to form a communicating passage 23g. Gas phase refrigerant and liquid phase refrigerant in an inlet side refrigerant flow passage 2a flow down while being mixed by crossing flow generated by a notch 25c provided on the inner fin 3, then, flow into the communicating passage 23g having the predetermined gap S. In this case, the gap S is narrow compared with the width of the refrigerant flow passage 2 and, therefore, the refrigerant is accelerated in the communicating passage 23g. Accordingly, the liquid phase refrigerant is pulverized so as to be the type of mist whereby the liquid phase refrigerant is mixed well with the gas phase refrigerant. According to this method, gas/liquid separation due to a density difference accompanied by the curvature and conversion of flow in an U-turn section can be restrained while the generation of stagnated part of the gas refrigerant can be restrained. Accordingly, an effective heat transfer area in the tube can be secured and cooling capacity can be improved.

2. 发明专利

JPH03129270A LAMINATION TYPE EVAPORATOR 失效
公开(公告)号：JPH03129270A
公开(公告)日：1991-06-03
申请号：JP24206289
申请日：1989-09-20
申请人： HITACHI LTD
发明人： SAWAHATA TAKATOMO , YAMAMORI HEITARO , MIYAMOTO SEIGO , KUDO MITSUO
IPC分类号： F25B39/02
摘要： PURPOSE:To sufficiently heat-exchange a liquid refrigerant with air to evaporate so as to prevent the outflow of the refrigerant by allowing a refrigerant to meander to flow toward the flow direction of air. CONSTITUTION:A liquid refrigerant allowed to flow in from an introduction pipe 8 is allowed to flow in first refrigerant passages 4-4c connected transversely and meander to flow in the direction shown by arrow marks in second refrigerant passages 6-6c a plurality of times to always become a counterflow to the flow of air. Accordingly, the refrigerant is allowed to meander to flow in the refrigerant passages 6-6c to evaporate and is gradually phase-changed from liquid to gas to increase a specific volume. Thereby the whole refrigerant is evaporated so as to prevent the outflow of the liquid refrigerant.

3. 发明专利

JPH02272299A LAMINATION TYPE HEAT EXCHANGER 失效
公开(公告)号：JPH02272299A
公开(公告)日：1990-11-07
申请号：JP9284989
申请日：1989-04-14
申请人： HITACHI LTD
发明人： KUDO MITSUO , HAYASHI MASAKATSU , FUKUSHIMA TOSHIHIKO , INNAMI TAMIO , SAWAHATA TAKATOMO
IPC分类号： F28D1/03 , F28F3/04
摘要： PURPOSE:To enhance a heat-exchanging efficiency by providing a channel at the bottom of the folded portion of a U-shaped refrigerant passage, the depth of the channel being deeper than the recessed part of each of heat transfer tube plates in a direction normal to an air stream, and the channel being formed in substantially parallel to the air stream. CONSTITUTION:Since a channel 22 is provided at the bottom of the folded portion of a U-shaped refrigerant passage 16 so as to be deeper than the recessed part 15 of each of heat transfer tube plates 11 and in substantially parallel to an air stream, more liquid refrigerant gathers in the channel 22 due to a centrifugal effect when the refrigerant takes a U-turn. The liquid refrigerant gathered in the channel 22 is made to flow toward the upstream side of the air stream along the channel 22 and flows directly into the flowing zone on the upstream side of the air stream in the U-shaped refrigerant passage 16, so that the liquid refrigerant is more supplied to the upstream side of the air stream where a thermal load is greater. As a result, an areal rate that is occupied by gas refrigerant, which does not contribute to heat exchange, on the flowing zone side on the upstream side of the air stream in the refrigerant passage 16 is decreased, and a heat-exchanging efficiency is improved. In addition, since a temperature on the tube wall of each of heat transfer tube plates 11 of a flat heat transfer tube 10 is high, the refrigerant flows more in the flowing zone on the upstream side of the air stream, where the viscosity of a freezer oil attached to the tube wall is low, whereby a flowing effect on the oil by the refrigerant is also improved. Accordingly, cooling performance is enhanced, the freezer oil is made easier to flow, and the return of the oil is improved.

4. 发明专利

JPS6419290A HEAT EXCHANGER 失效
公开(公告)号：JPS6419290A
公开(公告)日：1989-01-23
申请号：JP17096987
申请日：1987-07-10
申请人： HITACHI LTD
发明人： KUDO MITSUO , HAYASHI MASAKATSU , MIYAMOTO SEIGO , SAWAHATA TAKATOMO
IPC分类号： F28D1/047 , F28F1/12 , F28F1/30
摘要： PURPOSE:To make the entire air flow substantially parallel to fin base plates so as to improve the heat transfer function of the heat exchanger by changing the angle of inclination of inclined louvers between adjacent residual fin base plates alternately in the opposite direction at every residual fin base plate pitch along the air flow direction. CONSTITUTION:The heat exchanger comprises, on the surface of a flat fluid tube 31, a heat exchange part formed by connecting a large number of waveform top parts of corrugated fins 1 bent into a waveform to each other, while on the fin planar part of the corrugated fins 1, inclined louvers 5a, 5b, 5c, and 5d which are slit continuously in a bridge-form alternately on opposite sides with a fin base line 3 as a centerline and inclined at a predetermined angle theta with respect to the air flow. In a thus constructed heat exchanger, the inclination angle of an inclined louver group existing between adjacent residual fin base plates 1a, 2a, 2b and 2d, is designed to be changed alternately in the opposite direction at every residual fin base plate pitch along the flow direction. Furthermore, the section of each of residual fin base plates 2a and 2b is formed into a channel shape, and the front inclined surface and rear inclined surface are bent in the same direction as the adjacent inclined louvers.

5. 发明专利

JPS6375490A SERPENTINE TYPE EVAPORATOR 失效
公开(公告)号：JPS6375490A
公开(公告)日：1988-04-05
申请号：JP21945886
申请日：1986-09-19
申请人： HITACHI LTD
发明人： SAWAHATA TAKATOMO , YOKOYAMA MIZUHO
IPC分类号： F25B39/02 , B21D53/08 , F28D1/047 , F28F1/02
摘要： PURPOSE:To satisfy corrosion life, by a method wherein the thickness of the outer periphery of the lower bent section of a meandering perforated tube is formed so as to be a thickness corresponding to the corrosion life while the thickness of the outer periphery of an upper bent section is formed so as to be thinner than the thickness corresponding to the corrosion life. CONSTITUTION:A thickness, corresponding to an objective corrosion life, is shown by T0. The thickness (t1) of a lower bent section D, whereat a corrosion environment is severe, is determined so as to be equal to said thickness T0 among the thicknesses (t1), (t2) of the outer peripheries of the bent sections of a perforated tube 1'. On the other hand, the thickness (t2) of the upper bent section, whereat the corrosion environment is mild, is determined so as to be thinner than the thickness (t1) by a specified formula. The thicknesses T1, T2 of the outer periphery of the perforated tube 1' before bending work are determined by specified formulas respectively based on the thicknesses (t1), (t2). As a result, the objective corrosion life may be satisfied while the increases of a passageway resistance in the tube as well as the weight of the tube and the rise of the cost of a material therefor may be prevented.

6. 发明专利

JPS62194192A FIN FOR HEAT EXCHANGER 失效
公开(公告)号：JPS62194192A
公开(公告)日：1987-08-26
申请号：JP3304886
申请日：1986-02-19
申请人： HITACHI LTD
发明人： SAWAHATA TAKATOMO , YOKOYAMA MIZUHO
IPC分类号： F28F1/30
摘要： PURPOSE:To prevent a louver on a flat part from being hooked by the edge of a louver forming mold upon mold releasing and being deformed by a method wherein the louver on the flat part, which is extended in the fore-half of the process of press work, is formed by the forming mold in the next process. CONSTITUTION:A louver 2 on a flat part, which is extended upon press forming by louver forming molds 4, 4, is formed with a bent part 2a formed by press forming and a length in the direction of a distance W between the raised-slotted louvers 1, 3 is made shorter than the distance W to prevent the one side of the louver 2 on the flat part from being hooked by a louver forming mold 4 upon releasing it from the louver forming molds 4, 4 and being deformed.

7. 发明专利

JPS60155897A HEAT EXCHANGER OF ALUMINUM 失效
公开(公告)号：JPS60155897A
公开(公告)日：1985-08-15
申请号：JP1011684
申请日：1984-01-25
申请人： HITACHI LTD
发明人： TOMITA SATORU , SAWAHATA TAKATOMO
IPC分类号： F28D1/047 , F28F1/12 , F28F19/06
摘要： PURPOSE:To improve the corrosion resistance of fins and tubes without spoiling the inside of a furnace by loading both of the core and skin members for the heat exchanger of aluminum with zinc. CONSTITUTION:The heat exchanger is constituted of an aluminum tube 1, having a structure equipped with multiple holes and formed by bending into meandering configuration, and corrugated aluminum alloy fins 2, brazed inbetween the bent tube. In this case, 0.2-2wt% of zinc is contained in both of the brazing member and the core member 2d of the corrugated fin 2 to constitute it of the aluminum alloy whose electrode potential is more base than tube 1. According to this method, a potential difference of 30-50mV between the tube and the fins, which is necessary to develope sacrifice-corrosion, may be secured safely.

8. 发明专利

JPS57121913A Draft distributing device in air conditioner for automobile 失效
标题翻译：汽车空调机配送设备
公开(公告)号：JPS57121913A
公开(公告)日：1982-07-29
申请号：JP634281
申请日：1981-01-21
申请人： Hitachi Ltd
发明人： SAWAHATA TAKATOMO , ICHIKAWA RIYOUICHI
IPC分类号： B60H1/00
CPC分类号： B60H1/00685
摘要： PURPOSE:To reduce pressure loss in such a way that in a rotary mode change- over damper unit, circumferential area of a casing is divided into five equal parts, three opening parts are provided in 2/5 of the dampler's circumferential direction, and further a sectoral opening part is provided on each lateral side. CONSTITUTION:In case where an adjusting damper 41 is at the position (A), all the draft passes through a heater, and in case where it is at the position C, the draft does not pass through the heater, and it flows into a cylindrical damper 10. The damper 10 is integrated by a 72 deg. of sectoral lateral side opening part 19 and a 72 deg. of circumferential wall 16 in the remnant whose circumferential arc is cut off by 3/5, and the angle made by an end of the circumferential wall 16 and by an end of the opening part 19 is 36 deg.. On the other hand, a 72 deg. of sectoral foot blow-out port 22 is provided on a lateral side of a casing 20, a 72 deg. opened bent blow-out ports 21 is provided on the circumferentialn area, and a 72 deg. opened defroster blow-out port 23 is provided in the same manner. Such as this, since in the area of the draft blow-out ports, two are larger every 72 deg. on the cylindrical area, and one is sectorally large as much as 72 deg. to the both lateral sides, pressure loss in transit through the blow-out ports can be decreased.
摘要翻译：目的：为了减少压力损失，使得在旋转模式转换阻尼器单元中，壳体的周向区域被分成五个相等的部分，三个开口部分设置在阻尼器的圆周方向的2/5处，并且进一步在每个侧面设置扇形开口部。构成：在调节阻尼器41处于位置（A）的情况下，所有的通风通过加热器，并且在位置C的情况下，通风不通过加热器，并且流入阻尼器10一体化为72度。的扇形侧面开口部19和72度。圆周壁16的周向圆弧被切除3/5的周向壁16，并且由周壁16的端部和开口部19的端部形成的角度为36度。另一方面， 72度部分脚部吹出口22设置在壳体20的外侧，72度。打开的弯曲吹出口21设置在周向区域上，72度。以同样的方式设置打开的除霜器吹出口23。这样，由于在吹气口的区域中，每72度2个较大。在圆柱形区域上，一个扇区大到72度。可以减小穿过吹出口的运送中的压力损失。

9. 发明专利

JPH03140795A LAMINATION TYPE HEAT EXCHANGER 失效
公开(公告)号：JPH03140795A
公开(公告)日：1991-06-14
申请号：JP27587289
申请日：1989-10-25
申请人： HITACHI LTD
发明人： KUDO MITSUO , FUKUSHIMA TOSHIHIKO , INNAMI TAMIO , MIYAMOTO SEIGO , SAWAHATA TAKATOMO
IPC分类号： F28D9/00 , F28D1/03
摘要： PURPOSE:To improve the imbalance of a thermal load in the section of a refrigerant passage and unify the distribution of refrigerant into respective flat tubes by a method wherein the width of passage orthogonal to a heat transfer plate in the flat heat transfer tube is formed so as to be equalized from an inlet tank section to an outlet tank section substantially. CONSTITUTION:The thickness of a passage orthogonal to a heat transfer tube plate 1a is formed so as to be constant substantially between an inlet port header and an outlet port header, heat transfer tubes, equipped with a continuous refrigerant passage, are connected and even amount of refrigerant flows stably. In this case, the outer peripheral end 7b of U-shape sumit of a meandering refrigerant passage, neighboring to a tank section, is formed proximate to the outermost peripheral connecting rib 7 of the heat transfer tube plate while the width (h1) of an inlet tank and the width (h2) of an outlet tank are designed so as to be substantially equal to the width W1 of a first refrigerant passage 8a and the width W4 of a fourth refrigerant passage 8d respectively.

10. 发明专利

JPH0285659A CONDENSER 失效
公开(公告)号：JPH0285659A
公开(公告)日：1990-03-27
申请号：JP23503188
申请日：1988-09-21
申请人： HITACHI LTD
发明人： SAWAHATA TAKATOMO , MIYAMOTO SEIGO , INNAMI TAMIO , KANEMOTO KAZUO
IPC分类号： F25B39/04 , F28D1/053
摘要： PURPOSE:To prevent the leakage of refrigerant gas which has not completed condensation from a condenser by deciding a position which meets a time constant formula and the position of partition plates in a header pipe so that a flow rate of refrigerant gas at the inlet of a tube may be within a proper range. CONSTITUTION:Partition plates 7 are installed inside header pipes 1, and 2. The partition plates 7 are fixed at the position which meets the formula 1. Where H: partition plate fixing position, T: tube pitch (m), Gr: flow rate of refrigerant (kgf/s), rho: specific volume (m /kgf), A: cross sectional area of refrigerant passage per tube (m ), v: flow rate of refrigerant gas (m/s), N: number of tubes, L: length of condensation (m), d: equivalent diameter of tube (m), p: saturation pressure of liquefied refrigerant at 50 deg.C (kgf/cm bs), c1, c2, c3: constant.

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