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1. 发明专利

JPH0359203A HEAT PUMP TYPE ROAD SURFACE SNOW MELTING DEVICE 失效
公开(公告)号：JPH0359203A
公开(公告)日：1991-03-14
申请号：JP19416589
申请日：1989-07-28
申请人： HITACHI LTD , TOHOKU ELECTRIC POWER CO
发明人： MASUDA TAKASHI , OYAMA YUKIO , YOSHINAGA SHINYA , YOSHIDA YORIO , SUZUKI YOSHIKATSU
IPC分类号： E01H5/10 , E01C11/26
摘要： PURPOSE:To decrease partial snow melting by constituting a heat pump type refrigerating cycle out of a compressor, an evaporator, a four-way valve, and a condenser, and laying a heat radiating panel composed of a refrigerant pipe of a condenser and a heat radiating plate on the road surface. CONSTITUTION:A heat radiating panel 1 is laid on the road surface 2. A snow sensor 5 detecting a snow coverage quantity on the road surface 2 is provided, and a drainage ditch 6 is provided on the end part of the road surface 2. A heat radiating panel 1 is constituted so that the refrigerant pipe 1c of a condenser held with a heat exchanger plate 1b is meanderingly arranged on the lower part of a flat plate shaped heat radiating plate 1a and the heat exchanger plate 1b is connected to the heat radiating plate 1a. Further, a heat pump device 3 is composed of a compressor 7, a four-way valve 8, an outdoor heat exchanger 9, a blower 15, and the refrigerant pipe 1c for the condenser, the refrigerant pipe 1c is meanderingly arranged, and a plurality of heat radiating panels 1 are connected in parallel to the device 3. Hereby, snow melting on the road surface with few partial melting can be performed.

2. 发明专利

JPH0194173A SEPARATION TYPE THAWING DEVICE 失效
公开(公告)号：JPH0194173A
公开(公告)日：1989-04-12
申请号：JP15122787
申请日：1987-06-19
申请人： HITACHI LTD , TOHOKU ELECTRIC POWER CO
发明人： KANEKO TOMOMICHI , KASHIWAZAKI SUSUMU , MINAGAWA TSUNEHIKO , YOSHIDA YORIO , SATO FUJIO
IPC分类号： E04H9/16
摘要： PURPOSE: To prevent deterioration of snow melting ability to sufficiently melt snow, and reduce snow melting time by composing a refrigerating cycle of a room side heat exchanger on the high pressure side of a compressor, an outdoor side heat exchanger on the low pressure side, and a restricting mechanism. CONSTITUTION: A refrigerating cycle is composed by connecting a compressor 1 installed outdoor, a room side heat exchanger 3 constantly positioned on the high pressure side, a restricting mechanism 4 installed outdoor, and a room side heat exchanger 5 positioned on the low pressure side of the compressor 1 through connection tubes 9, 10 in order. A separated type snow melting device is composed with a switching valve 8 connected in parallel to the restricting mechanism 4 to be opened in defrosting operation, and an internal blower 7 for ventilation to the heat exchanger 3, and the heat exchanger 3 and the blower 3 are stored in a duct part composing a building roof. Cooling medium pressure loss in the refrigerating cycle can thus be reduced without providing a four-way valve, and heat leak can be prevented.

3. 发明专利

JPH04277203A HEAT PUMP TYPE ROAD SNOW MELTING APPARATUS 失效
公开(公告)号：JPH04277203A
公开(公告)日：1992-10-02
申请号：JP3583891
申请日：1991-03-01
申请人： HITACHI LTD , TOHOKU ELECTRIC POWER CO
发明人： MASUDA TAKASHI , OYAMA YUKIO , YOSHIDA YORIO , YAMADA TOSHIRO
IPC分类号： E01C11/26 , E01H5/10 , F25B41/00
摘要： PURPOSE:To melt snow lying on a road surface less uneven melting. CONSTITUTION:A condenser is composed of refrigerant pipes 1c branced into a plurality of pipes and interconnected in parallel, and embedded in a road surface. The refrigerant pipes 1c are provided in the respective outlet with a pressure reducing mechanism 18 to uniform an amount of refrigerant flowing in the respective refrifgerant pipes 1c, so that the road surface can be uniformly heated to realize snow melting on the road surface with less uneven melting.

4. 发明专利

JPS63315777A HEAT PUMP TYPE THAWING DEVICE 失效
公开(公告)号：JPS63315777A
公开(公告)日：1988-12-23
申请号：JP15122887
申请日：1987-06-19
申请人： HITACHI LTD , TOHOKU ELECTRIC POWER CO
发明人： OYAMA YUKIO , MASUDA TAKASHI , MINAGAWA TSUNEHIKO , YOSHIDA YORIO , SATO FUJIO
IPC分类号： E04H9/16 , F25B1/00 , F25B30/02

5. 发明专利

JPH0813849A METHOD AND APPARATUS FOR PREVENTING FREEZE ON EAVES BY ELECTRICAL HEATING 失效
公开(公告)号：JPH0813849A
公开(公告)日：1996-01-16
申请号：JP16751994
申请日：1994-06-28
申请人： TOHOKU ELECTRIC POWER CO , KITA NIPPON ELECTRIC CABLE CO
发明人： YOSHIDA YORIO , HIRAMA SHINYA , KIZARA AKIRA , WAKASA HIROAKI
IPC分类号： E04D13/00 , E04H9/16 , H05B3/00
摘要： PURPOSE:To prevent freeze on the edge of the eaves with a less amount of electric power consumed by a method wherein a plate-like heating body of a specified width is brought into contact with the lower part on the front of a steel roof plate with the heating surface thereof fixed in parallel with the roof steel plate, and generation of heat from the heating body is controlled by operation of temperature sensors. CONSTITUTION:A plate-like heating body 5 of 3-10cm width is fixed with a fixing body 6 for fixing the plate-like heating body 5 to the surface of a fascia board 4 in parallel with a roof steel plate 2 on a position near the lower part on the front end 3 of the roof steel plate 2. A lead wire 7 for power source for the plate-like heating body and a lead wire 8 for a temperature sensor for automatic control are laid in a space 6a for storing the lead wires and connected to a power source controlling panel. As automatic control is made to be available with contact being kept to the power source, the temperature on the surface of the plate-like heating body 5 falls when snowfall 16 is made on the roof or melted snow 18 flows over the plate-like heating body 5, and heating starts with electric power supplied to the heating body. When snowfall 16 and melted snow 18 are not present, sensors 14 and 15 work to interrupt supply of electric power. When the plate-like heating body 5 is in operation, snowfall 16 is melted by heat of the heating body, heat 24 conducted and radiant heat 25 from the heating body.

6. 发明专利

JPH02217577A HEAT PUMP TYPE SNOW-MELTING DEVICE 失效
公开(公告)号：JPH02217577A
公开(公告)日：1990-08-30
申请号：JP3694389
申请日：1989-02-16
申请人： TOHOKU ELECTRIC POWER CO , MITSUBISHI ELECTRIC CORP
发明人： MINAGAWA TSUNEHIKO , YOSHIDA YORIO , ENDO MAKOTO
IPC分类号： E04H9/16
摘要： PURPOSE:To make a device serve a double purpose of cooling and heating and to improve usability thereof by incorporating a four-way selector valve and a heat exchanger into a refrigerant circuit, and by producing circulation by a circulating pump through a circuit connecting the heat exchanger and a snow-melting panel. CONSTITUTION:A four-way selector valve 9 for switching the direction of flow for refrigerant gas and a heat exchanger 8 controlling air conditioning at the inside of a room are incorporated into a refrigerant circuit. Then circulation through a circuit connecting the heat exchanger 8 and a snow-melting panel 5 is made by a circulating pump 10. During the wintertime, the snow-melting panel 5 is put into operation, while the device is run for heating operation. In the summertime, cooling operation is made possible by switching the direction of flow of the same refrigerant, while using the snow-melting panel 5 as a radiator.

7. 发明专利

JPH0835786A ROD-FORM LOOP TYPE HEAT PIPE 失效
公开(公告)号：JPH0835786A
公开(公告)日：1996-02-06
申请号：JP19197294
申请日：1994-07-22
申请人： TOHOKU ELECTRIC POWER CO , KITASHIBA ELECTRIC
发明人： YOSHIDA YORIO , HIRAMA SHINYA , TOMITA YASUO , SATO HIROYUKI
IPC分类号： F28D15/02
摘要： PURPOSE:To provide a rod-form loop type heat pipe which is constituted to separate a steam passage through which refrigerant steam is raised and a liquid return passage through which a refrigerant condensed at a condensation part is returned and causeds flow-down of all the condensed refrigerant through the liquid-return passage, and provide an excellent heat transmission efficiency. CONSTITUTION:A vaporization part 5 is formed at the lower part of a vertical metallic pipe 3a having a lower end being closed and an upper end being opened and a condensation part 6 is formed at a metallic pipe 3b having two ends being closed and tilted. The opening upper part of the metallic pipe 3a at which the vaporization part 5 is arranged is protruded in the inner lower side of the metallic pipe 3b at which the condensation part 6 is arranged and the lower side of the tilting condensation part 3b forms a liquid reservoir 13. A liquid return part 9 through which the liquid reservoir part 13 and the vaporization part 5 are intercommunicated is located in the metallic pipe 3a at which the vaporization part 5 is arranged. The sectional area of the liquid return passage 9 is reduced to a value lower than that of the metallic pipe 3a at which the vaporization part 5 is arranged.

8. 发明专利

JPH05295705A 失效
公开(公告)号：JPH05295705A
公开(公告)日：1993-11-09
申请号：JP18297691
申请日：1991-06-27
申请人： TOHOKU ELECTRIC POWER CO , MAEKAWA SEISAKUSHO KK
发明人： NAGAOKA NORIYA , YOSHIDA YORIO , HARADA HIROSHI , KUDO TAKANORI , MIYAOU MASAO , SATO KAZUYOSHI , OSANAI TSUNEYUKI , NOBUHIRA KOUSEI
IPC分类号： E01C11/26 , E01H5/10
摘要： PURPOSE:To facilitate the udnerground installation of a device by integrally arranging each equipment in a snow melting device and arranging a grating for an intake and exhaust port in the upper part. CONSTITUTION:The circulation liquid of a snow melting panel buried in a road is heated through a water heat exchanger 11 by a coolant whose temperature is raised by a heat pump compressor 10, and used for melting the snow on the road surface, and the liberated heat is recovered from the outside air by an air heat exchanger 13, and a heat pump cycle is formed. Then, the outside air taken in from an intake grating 20 is discharged from an exhaust grating 26 in the course of the air streams 30, 31, 32 and 34, and the ventilation in a room is performed. Then, the gratings 20 and 26 and a ceiling plate 23 are heated by the electrical heat or the branched stream of the circulation liquid of the exchanger 11, and the piling of snow and ice freezing are prevented. The intruding molten water is separated by an intake louver 22 and an exhaust louver 24 and discharged outside. Further, the circulation liquid is allowed to branched-flow in the rectangular pipe 60 of the uppermost edge frame, and an atmosphere opened vent pipe is installed as expansion tank. Accordingly, the upper surface of the device can be made same to the ground surface, and the installation under the ground can be executed in simple manner.

9. 发明专利

JPH01305392A SNOWFALL DETECTING APPARATUS 失效
公开(公告)号：JPH01305392A
公开(公告)日：1989-12-08
申请号：JP13673888
申请日：1988-06-03
申请人： TOHOKU ELECTRIC POWER CO , TSUKEN DENKI KOGYO KK
发明人： MINAGAWA TSUNEHIKO , SHINOJIMA KENJI , YOSHIDA YORIO , NISHIMURA TAKUHIKO
IPC分类号： G01J1/02 , G01S17/88 , G01S17/95 , G01W1/14
摘要： PURPOSE:To ensure the detection of snowfall regardless of the state of the snowfall by providing a high response type snowfall detecting part, a light transmitting snow shielding plate which is attached at a part immediately before the snowfall detecting part, and planar heaters which are attached on the snow shielding plate. CONSTITUTION:The detecting elements of a snowfall detecting part 1 comprise a light emitting element 3 and a photodetector 4 which are highly-responsive and diffusion-reflection type photoelectric elements. The elements are attached to the front surface of a detecting case in an array pattern. A light transmitting snow shielding plate 6 which can transmit infrared rays is mounted at a part immediately before the photoelectric elements of the detecting part 1 for preventing damages on the surfaces of the photoelectric elements and attachment of snow and the like. Planar heaters 7 having an automatic temperature control function are attached to the rear surface of an acrylic resin plate 6 so that the transmission of the infrared rays is not blocked. In this constitution, the infrared rays which are transmitted through the snow shielding plate 6 from the element 3 are reflected from snow pieces 8. The reflected light is received with the photodetector 4, and the snowfall is detected. The detected signal which is detected in the detecting part 1 is counted in a control part 2, thereby the intensity of the snowfall can be measured based on the number of the total counts.

10. 发明专利

JPS63241278A METHOD AND APPARATUS FOR REMOVING SNOW OF ROOF 失效
公开(公告)号：JPS63241278A
公开(公告)日：1988-10-06
申请号：JP7177087
申请日：1987-03-27
申请人： TOHOKU ELECTRIC POWER CO , KITA NIPPON DENSEN KK
发明人： MINAGAWA TSUNEHIKO , SHINOJIMA KENJI , YOSHIDA YORIO , ABE KUNIHARU , SAITO YOSHIO , ONODERA TAKAO
IPC分类号： E04H9/16

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