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公开(公告)号：JPH0478457A
公开(公告)日：1992-03-12
申请号：JP19332990
申请日：1990-07-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAMA HIROTO
Abstract: PURPOSE:To increase the efficiency of dust collection under conditions controlling the amt. of ozone generated by setting an electret filter so that the filter crosses an air passage in zigzag and arranging discharge wires at specified regular intervals in a discharge section composed of the discharge wires and flat electrodes. CONSTITUTION:A discharge section 14 composed of discharge wires 12 and flat electrodes 11 is formed at the upper stream side of an air passage and an electret filter 16 is set at the downstream side so that the filter crosses the air passage in zigzag. The discharge wires 12 are arranged at 27-40mm intervals L. High efficiency of dust collection can be obtd. under conditions controlling the amt. of ozone generated so that the concn. of ozone from a nozzle is reduced to
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公开(公告)号：JPH0427780A
公开(公告)日：1992-01-30
申请号：JP12952490
申请日：1990-05-19
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAMA HIROTO
Abstract: PURPOSE:To remove the moisture mixed in a refrigerant before acid and a harmful material are generated by providing a moisture sensor at the position dipped in the refrigerator oil, and providing an electric heater below the outer face of a sealed casing. CONSTITUTION:A mixed liquid 11 of a refrigerant made of at least one or more carbon halogenide compounds substituted with hydrogen and refrigerator oil solved in the refrigerant is sealed in a sealed casing 14. A machine section 1, a motor section 12 and a moisture sensor 16 located at the position dipped in the mixed liquid 11 are stored and fixed in the sealed casing 14. An electric heater 19 is provided below the outer face of the sealed casing 14. When the moisture sensor 16 detects moisture, the heater 19 is excited, and the moisture in the refrigerator oil is evaporated into the refrigerant. The moisture is removed by a dehydrating agent while the refrigerant is circulated in a refrigerating system. Moisture is removed before acid and a harmful material are generated, and the occurrence of leakage, corrosion abrasion, and defective cooling can be prevented.
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公开(公告)号：JPH03169358A
公开(公告)日：1991-07-23
申请号：JP30793589
申请日：1989-11-28
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAMA HIROTO
Abstract: PURPOSE:To rationalize a filter replacing period by providing a filter replacement judging means wherein an electret filter replacing display is operated when the integrated value of the product of the degree of air contamination due to a gas sensor and the number of rotations of a fan exceeds a predetermined value. CONSTITUTION:A charge part 1 consisting of discharge wires 2, parallel plate electrodes 3 and a DC voltage power supply 4 is provided on the upstream side with respect to an air stream and an electret filter 6 is provided on the downstream side. The filter 6 is arranged in a corrugated shape so as to cross an air passage and a gas sensor 7 detecting the contamination of air is provided on the upstream side of the filter 6 and a means 10 detecting the number of rotations of an air suction fan 8 is arranged on the downstream side of the filter 6. In a filter replacement judging means 11, the replacement display of the filter 6 is operated when the integrated value of the product of the degree of air contamination due to the gas sensor 7 and the number of rotations of the fan exceeds a predetermined value. As a result, the replacement period of the electret filter can be rationalized.
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公开(公告)号：JPH0377656A
公开(公告)日：1991-04-03
申请号：JP21331389
申请日：1989-08-18
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAMA HIROTO , HIRAMATSU SAWAKO
Abstract: PURPOSE:To improve the dust collecting efficiency and to prolong the life of filter by disposing a discharge part consisting of 1st discharge lines and metallic nets in the upstream side of air flow, and eletret filters in the downstream side in wave form, and arranging 2nd discharge lines in farther downstream side. CONSTITUTION:The discharge part 1 provided in the upstream side of air flow consists of the metallic nets 2 disposed in wave form, the 1st high potential discharge lines 3 provided in the recessed parts of the nets, and high potential electric power source 4. The dust collecting part 5 provided in the downstream side of air flow consists of electret filters 6 disposed in wave form, 2nd high potential discharge lines 7 provided in the recessed parts of the filters, and high potential electric power source 8 impressing high potential to the discharge lines. Thus, by reducing the wind velocity passing through the filters 6 to improve the dust collecting efficiency, and by dielectrically polarizing the filter 6 having lost the dielectric force with the 2nd discharge lines to give them dielectric force, the life of the filters is prolonged.
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公开(公告)号：JPH0347547A
公开(公告)日：1991-02-28
申请号：JP18106189
申请日：1989-07-12
Applicant: MATSUSHITA REFRIGERATION
Inventor： HIRAMATSU SAWAKO , NAKAMA HIROTO
Abstract: PURPOSE:To improve initial collection efficiency by mounting a charge part on the upstream side while mounting an electret filter on the downstream side and providing parallel electrode plates on the upstream side of the electret filter. CONSTITUTION:High voltage is applied to high voltage discharge wires 2 by a high voltage power supply 4 to form ionizing regions. Coarse particles 11 are removed by a predetermined filter 10 and the fine particles 12 passed through said filter 10 are charged with electrons or ions discharged in the ionizing regions to become charged particles 12'. When the charged particles 12' approach an electret filter 6, said charged particles 12' are attracted to the bipolar polarizers of the electret filter 6 on the negative side thereof by electrostatic force to be collected by said filter 6. When high voltage is applied to the high voltage discharge wires 7 on the upstream side of the electret filter, the charged particles 12'. are further collected by electrostatic force. By this constitution, collection efficiency is enhanced and pressure loss is reduced.
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Patent Agency Ranking
公开(公告)号：JPH0312247A
公开(公告)日：1991-01-21
申请号：JP14900789
申请日：1989-06-12
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAMA HIROTO , HIRAMATSU SAWAKO
Abstract: PURPOSE:To manufacture an air purifying device with small pressure loss and of good collecting efficiency by disposing an electret filter on the downstream side of a discharge section by means of guide rolls in the wavy form and rotating the guide rolls synchronized with a motor of a wind-up device. CONSTITUTION:An ionized zone is formed by flowing discharge current from a high voltage discharge line 2 to a polar-resistant set metal polar plate 3 and fine particles 24 passing through a prefilter 22 are charged to (+) when passing through the ionized zone to turn into charged particles 24' and collected to the (-) side of dipole polarizer of an electret filter 6. The pressure loss of air flow passing through the electret filter 6 is measured by a pressure sensor 17 and output to a pressure loss deciding means 18. When the pressure loss becomes the control pressure, a signal is transmitted from the pressure loss deciding means 18 to a motor control means 19 to start a motor 9 and deliver the electret filter 6 from a delivery section 8, transferred in the wavy form through guide rolls 10 and 11 and wound up in the given quantity in a manner that the flow upstream side forming the inside by a wind-up section 7.
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公开(公告)号：JPH0312245A
公开(公告)日：1991-01-21
申请号：JP14902389
申请日：1989-06-12
Applicant: MATSUSHITA REFRIGERATION
Inventor： HIRAMATSU SAWAKO , NAKAMA HIROTO
Abstract: PURPOSE:To switch over deodorizing function automatically and keep maintenance-free for a long time by providing a dust collection section on the downstream side of air flow and a charged section and an odor sensing means on the upstream side and operating an ozone generating means corresponding to the variation of odor quantity in the air sucked in. CONSTITUTION:A charged section 1 consisting of a discharge line 2 and a flat electrode 3 and an odor sensing means 11 are provided on the upstream side to the air flow and a dust collecting section 5 and an ozone generating means 13 are provided on the downstream side. The result of measuring the odor quantity by the odor sensing means 11 is input into an odor quantity deciding means 12, which is input into a power source device 4 to start deodorizing operation for the ozone generating means 13 when the odor quantity is beyond the given value, and to stop the operation when the quantity is less than the given value. Further, a timer 18 for computing the operation time of the ozone generating means 13 and means 15 and 16 for deciding and indicating the exchange time of ozone decomposing mediums 13 from the time computed by said timer 18. Deterioration of deodorizing effect with time is eliminated by said arrangement and deodorizing function is kept maintenance-free for a long time.
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公开(公告)号：JPS646687A
公开(公告)日：1989-01-11
申请号：JP16006687
申请日：1987-06-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAMA HIROTO
Abstract: PURPOSE: To defrost frozen food without defrosting irregularity and to reduce defrosting time by changing input to a far infrared heater and a bottom face heater using a temperature detector for detecting time or the temperature of a defrosting tray. CONSTITUTION: When frozen food 19 to be defrosted is taken out of a freezer chamber 2 and is placed at the center of a tray 20 of a defrosting chamber 4 and then a defrosting switch is pressed, a control means 23 of a control device 22 performs the energization of the maximum input to a far infrared heater 16 and a heater 18 for heating via a heater drive means 24. Then, the control means 23 reduces a defrosting speed by setting the energization to the far infrared heater 16 to 1/2 when specific time t1 passes from the start of defrosting. Then, when second setting time t2 passes, the energization to the heating heater 8 is temporarily stopped, then the temperature of the tray 20 being detected by a thermistor 21 is controlled to be maintained at a specific value, and defrosting is completed when a specific time passes, thus defrosting frozen food without any irregularity and minimizing defrosting time.
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公开(公告)号：JPS63129922A
公开(公告)日：1988-06-02
申请号：JP27605986
申请日：1986-11-19
Applicant: MATSUSHITA REFRIGERATION , MATSUSHITA ELECTRIC IND CO LTD
Inventor： HAMAMOTO HIROSHI , TAKEDA JUN , NAKAMA HIROTO , SHIMIZU TAKESHI , SUZUKI JIRO , HOSAKA MASATO
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公开(公告)号：JPS63126425A
公开(公告)日：1988-05-30
申请号：JP27336186
申请日：1986-11-17
Applicant: MATSUSHITA REFRIGERATION , MATSUSHITA ELECTRIC IND CO LTD
Inventor： NAKAMA HIROTO , TAKEDA JUN , SHIMIZU TAKESHI , HAMAMOTO HIROSHI , TANAHASHI ICHIRO , YOSHIDA AKIHIKO
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