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公开(公告)号：JP2001317772A
公开(公告)日：2001-11-16
申请号：JP2000138676
申请日：2000-05-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURAMOTO TETSUEI , MAEDA MUNEKAZU , MARUMOTO KAZUHIKO
Abstract: PROBLEM TO BE SOLVED: To save the energy of an air conditioning system keeping the cleanliness of air inside a store in the system for the stores. SOLUTION: The air conditioning system is arranged with an outside air processing filter 3 for removing dust in outside air, an air supply fan 12 for supplying the outside air into the inside of the store through the outside air processing filter 3, an exhaust fan 13 for exhausting the air inside the store to the outside of the store, a differential pressure sensor DP for detecting the differential pressure between the pressures of the inside and the outside of the store, an air supply flow controller CNT1 for controlling the air flow to keep the differential pressure detected by the differential pressure sensor DP at the predetermined value of 0 or higher, an auxiliary blower fan 15 arranged at the ceiling near an entrance door for blowing the taken in air inside the store into the outside of the room through the entrance door, and an auxiliary blower fan controller HOJ1 for operating the auxiliary blower fan 15 for predetermined time when a human body detecting sensor 16 arranged at the upper part of the entrance door detects the approach of a person. As a result, the intrusion of the outer air into the inside of the store can be prevented, the cleanliness of the air inside the store can be maintained and the energy can be saved.
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公开(公告)号：JP2001153441A
公开(公告)日：2001-06-08
申请号：JP33714599
申请日：1999-11-29
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURAMOTO TETSUEI , MAEDA MUNEKAZU , MARUMOTO KAZUHIKO
IPC: F24F11/04
Abstract: PROBLEM TO BE SOLVED: To keep air purification degree at a level in a shop. SOLUTION: An air-conditioning system comprises an air conditioner 7 for controlling air in a shop, an outdoor air processing filter 3 for removing dust in the outdoor air, an air supply fan 12 for supplying the outdoor air to the shop through the filter 3, an exhaust fan 13 for exhausting the air in the shop outside, and a differential pressure sensor DP for detecting the differential pressure between the inside and outside the shop. The system further comprises an air supply rate control device CNT1 for controlling the air supply rate so that the differential pressure detected by the sensor DP becomes a positive set value (a condition where the pressure inside the shop is higher than the pressure outside the shop). Thus, the outdoor air is prevented from entering into the shop to keep the air purification rate inside the shop at a level.
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公开(公告)号：JP2000292021A
公开(公告)日：2000-10-20
申请号：JP9630799
申请日：1999-04-02
Applicant: MATSUSHITA REFRIGERATION
Inventor： MARUMOTO KAZUHIKO , MAEDA MUNEKAZU , KURAMOTO TETSUEI
Abstract: PROBLEM TO BE SOLVED: To prevent reduction of cooling capacity during cooling operation, to prevent a stop of a compressor on the air-conditioning side through high pressure protection during cooling operation on an excessive load condition, and to save energy. SOLUTION: This refrigerating air-conditioning device comprises a heat recovery heat-exchanger 30 wherein a fin is commonly used by a refrigerating circuit 61 and an air-conditioning circuit 60 and a heat transfer pipe of each circuit inserted in the fin is arranged in a zigzagging state; an air-conditioning circuit 60 formed that a compressor 1 on the air-conditioning side, a four-way valve 2, a heat recovery heat- exchanger 30, an outdoor heat-exchanger 5 on the air-conditioning side, an outdoor expansion valve 4, an indoor expansion valve 8, and an indoor heat-exchanger 9 are interconnected; and a refrigerating circuit 61 formed in such condition that a compressor 20 on the refrigerating side, a heat recovery heat-exchanger 30, an outdoor heat- exchanger 21 on the refrigerating side, a show case expansion valve 24, and a show case evaporator 25 are interconnected. The outdoor heat-exchanger on the air- conditioning side performs heat-exchange equal to that when the refrigerating circuit 61 and the air-conditioning circuit 60 are respectively operated alone and effects heat exhaust, and avoids lowering of air-conditioning capacity during cooling operation and a stop of the compressor 1 on the air-conditioning side.
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公开(公告)号：JP2000018739A
公开(公告)日：2000-01-18
申请号：JP18013998
申请日：1998-06-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： MARUMOTO KAZUHIKO , NAKAGAWA NOBUHIRO , KURAMOTO TETSUEI
IPC: F25B1/00
Abstract: PROBLEM TO BE SOLVED: To prevent wet vapor suction to a compressor when a liquid refrigerant and a refrigerator oil are separated into two layers in an accumulator. SOLUTION: A point between a compressor 1 and a four-way valve 2 is connected to the bottom part of an accumulator 3 by a high-voltage bypass circuit 15 with a solenoid valve 13 ands restrictor device 14. Then, when separation into two layers, namely the liquid refrigerant and refrigeration machine oil in a storage room 8 is detected by a double-layer separation control detection means 17 according to a temperature that is detected by a thermistor 16, the solenoid valve 13 is opened by a valve opening/closing means 18 and a discharge gas is supplied to the storage room 8, and agitation is made by the discharge gas for forming a mixed liquid and for returning it to the compressor 1. Then, a double-layer separation control completion means 19 detects that double-layer separation is eliminated according to a temperature that the thermistor 16 detects, the valve opening/closing means 18 closes the solenoid valve 13.
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公开(公告)号：JPH11201565A
公开(公告)日：1999-07-30
申请号：JP455198
申请日：1998-01-13
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURAMOTO TETSUEI , NAKAGAWA NOBUHIRO , MARUMOTO KAZUHIKO
IPC: F25B1/00
Abstract: PROBLEM TO BE SOLVED: To prevent the drop of flow rate in an oil return capillary, or its clogging, concerning an air conditioner. SOLUTION: This air conditioner is one in which an oil separator 2 and the suction pipe of a compressor 1 are connected with each other through an oil return capillary 7, and which is equipped with an electric heater 8 for heating the outlet part or the whole of the oil return capillary part 7. Hereby, the flow rate drop or clogging of the oil return capillary 7 can be prevented, by suppressing the deposition and accumulation of the impurities at the outlet part of the oil return capillary 7, thus the reliability on the system improves.
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Patent Agency Ranking
公开(公告)号：JPH1114200A
公开(公告)日：1999-01-22
申请号：JP16398397
申请日：1997-06-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAGAWA NOBUHIRO , MARUMOTO KAZUHIKO , KURAMOTO TETSUEI
IPC: F25B43/02
Abstract: PROBLEM TO BE SOLVED: To return oil to a compressor and prevent liquid from returning to the compressor regardless of the quantity of liquid refrigerant in an accumulator. SOLUTION: An accumulator comprises a storage chamber 5 for storing a refrigerant, an inlet pipe 6 inserted into the upper part of the storage chamber 5, an outlet pipe 7 inserted from the upper part of the storage chamber 5, passing a part near the bottom part of the storage chamber 5 and opened to the upper part of the storage chamber 5, an oil return hole 9 provided in the outlet pipe 7 located in the vicinity of the bottom part of the storage chamber 5, an oil level detecting means 10 for detecting the oil level of refrigerating machine oil stored in the storage chamber 5, a connecting means 11 for connecting the oil level detecting means 10 to the outlet pipe 7 located in the vicinity of the bottom part of the storage chamber 5 and an auxiliary oil retain hole 12 provided in the connecting means 11 located near the oil level detecting means 10. Thus, even when liquid refrigerant is stored in the storage chamber 5, the quantity of return oil to a compressor can be maintained and liquid can be prevented from returning to the compressor.
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公开(公告)号：JPH1062020A
公开(公告)日：1998-03-06
申请号：JP22095296
申请日：1996-08-22
Applicant: MATSUSHITA REFRIGERATION
Inventor： AOYAMA SHIGEO , YONEDA HIROSHI , KURAMOTO TETSUEI
Abstract: PROBLEM TO BE SOLVED: To perform ice-making operation by utilizing an electric power available at night and reduce power consumption during cooling operation in the daytime by effectively utilizing cold heat accumulated by the ice-making operation. SOLUTION: A series connection circuit between a variable speed compressor 2b and a second two-way valve SV2 is parallely connected to a series connection circuit among a constant speed compressor 2a, an outdoor heat exchanger 3, an outdoor expansion valve 5 and a first two-way valve SV1, and, moreover, a bypass valve BV is provided between an outlet pipe of the constant speed compressor 2a and an outlet pipe of the variable speed compressor 2b. A pipe between the outdoor expansion valve 5 and the first two-way valve SV1 is allowed to communicate to an outlet pipe of a heat storage tank STR via a third two-way valve SV3, and the outlet pipe of the heat storage tank STR is allowed to communicate to a collecting outlet pipe of an indoor unit 10 via a fourth two-way valve SV4. With this arrangement, a refrigerant discharged from the variable speed compressor 2b exchanges heat with cold water under a low condensation pressure with the aid of a heat exchanger HE in the heat storage tank during cooling operation performed by utilizing accumulated cold heat, whereby the condensation pressure can be dropped to a great extent, and the reduction of power to be consumed by the variable speed compressor 2b and the improvement of reliability thereof can be achieved.
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公开(公告)号：JPH1038347A
公开(公告)日：1998-02-13
申请号：JP19026396
申请日：1996-07-19
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURAMOTO TETSUEI , AOYAMA SHIGEO
Abstract: PROBLEM TO BE SOLVED: To enable a cooling capability to be increased without promoting corrosion at a heat exchanger of a heat accumulative tank with air during a deicing operation mode where a cooling operation is carried out by an indoor device under utilization of ice stored in the heat accumulative tank. SOLUTION: There is provided a water pump control device CNT1 for use in operating a pump PM2 in the case that an amount of ice within a heat accumulative tank STR detected by a heat accumulative amount sensing device CAL during a deicing operation mode is not less than a predetermined value, and stopping the pump PM2 in the case that an amount of ice within the heat accumulating tank STR is lower than the predetermined value. With the foregoing system, an outer side heat transfer rate of a heat transfer pipe at a secondary side heat exchanging section 6 is improved due to an occurrence of water flow in the heat accumulative tank STR and then a deicing speed of ice within the heat accumulative tank STR is improved and a cooling capability within the indoor area is increased. In addition, since the heat transfer pipe for use in deicing of the secondary side heat exchanging section 6 at the heat accumulative tank 2 is not directly contacted with air, it is possible to prevent corrosion with air from being promoted.
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公开(公告)号：JPH0828991A
公开(公告)日：1996-02-02
申请号：JP15720594
申请日：1994-07-08
Applicant: TOKYO ELECTRIC POWER CO , MATSUSHITA REFRIGERATION
Inventor： MACHIDA KAZUHIKO , AOYAMA SHIGEO , KURAMOTO TETSUEI , SUZUKI KOZO , SUGITA YOSHIHIDE
IPC: F25B13/00
Abstract: PURPOSE:To perform a proper adjustment of an amount of refrigerant in a secondary refrigeration cycle during a normal cooling operation by a method wherein a flow rate valve, an indoor fan and a compressor are controlled to be driven in response to each of detected information of each of sensing means for sensing a cooling operation mode, a refrigerant over-cooling degree and a pressure. CONSTITUTION:A heat storage type air condition comprising a primary refrigeration cycle and a secondary refrigeration cycle is operated such that a cooling operation mode not using any heat radiation side heat exchanger at the secondary refrigeration cycle is detected by an operation mode sensing means 19 of the first control device CN1. A refrigerant over-heating degree at an outlet of a second auxiliary heat exchanger during a cooling operation and its holding time are detected by the first refrigerant over-cooling degree sensing means 20. In addition, each of inner pressure differences between the secondary heat exchanger and the heating heat exchanger is detected by a pressure sensing means 12. Then, the processing is carried out by the first calculating and processing means 22 in such a manner that the second flow rate valve and a plurality of indoor fans as well as the compressor may be driven in reference to each of the detected information of each of sensing means 19 to 21.
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公开(公告)号：JPH085184A
公开(公告)日：1996-01-12
申请号：JP13869694
申请日：1994-06-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： MORIWAKI SHUNJI , OGAWA MITSUO , TANAKA MASAYUKI , EGUCHI HIROAKI , NOMA TOMIYUKI , HAYASHI JUNJI , KURAMOTO TETSUEI , YABUSHITA AKIHIRO , TAKATANI TAKAYUKI
IPC: F25B13/00
Abstract: PURPOSE:To obtain a refrigerant responsive to a load with a low-cost specification and to always obtain the reliability of the compressor. CONSTITUTION:The multi-room split type air conditioner comprises discharge superheat degree detecting means 25 for detecting the superheat degree of the output side of a compressor, suction superheat degree detecting means 26 for detecting the superheat degree of the suction side of the compressor, and outdoor side expansion valve control means 27 inputting the detected values of the means 25, 26 at the time of setting a heating circuit by a four-way valve to control the valve opening of an outdoor side expansion valve.
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