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1. 发明专利

JPH11211247A AIR CONDITIONER 失效
公开(公告)号：JPH11211247A
公开(公告)日：1999-08-06
申请号：JP26665998
申请日：1998-09-21
申请人： TOSHIBA CORP
发明人： MOTOHASHI HIDEAKI , ISHIKAWA MITSURU , NAGAMORI AKIRA , KUBO TORU , ARAKAWA HIROYUKI , OTA TAKASHI
IPC分类号： F24F11/02 , F25B1/00
摘要： PROBLEM TO BE SOLVED: To enhance reliability of a refrigeration cycle by decreasing the r.p.m. of a compressor before decreasing the r.p.m. of the condenser and a fan and preventing over pressure rise on the high pressure side thereby suppressing abnormal stop of a compressor, and the like, or release control. SOLUTION: A control section 31 performs general control of an air conditioner and a second speed control circuit 30 sets the rotational speed of an outdoor fan motor 8M at a level corresponding to a command from the control section 31 at the time of power supply voltage control for the motor 8M. A first speed control circuit 29 sets the rotational speed of an indoor fan motor 4M at a level corresponding to a command from the control section 31 at the time of power supply voltage control for the motor 4M. An indoor tan control means 31a at the control section 31 decreases the r.p.m. of a compressor 2 before the r.p.m. of an indoor tan 4 for main and sub-indoor heat exchangers 5, 6 serving as a condenser at the time of heating operation is decreased.

2. 发明专利

JPH08247576A AIR-CONDITIONER 失效
公开(公告)号：JPH08247576A
公开(公告)日：1996-09-27
申请号：JP5438195
申请日：1995-03-14
申请人： TOSHIBA CORP
发明人： MOTOHASHI HIDEAKI , FURUHAMA KOKICHI , KOMAZAKI MEGUMI , SANO TETSUO
IPC分类号： F28F13/02 , F25B39/00 , F28D1/047 , F28D1/053
摘要： PURPOSE: To reduce in size a heat exchanger without lowering the performance. CONSTITUTION: In an air-conditioner in which refrigerant discharged from a compressor 1 is passed via an indoor unit 9 having at least heat exchangers 3, 7 and an outdoor unit 11, as the refrigerant, 2500kPa or higher of refrigerant having saturation temperature at 50 deg.C is used, and the exchanger 3 in the unit 9 satisfies the condition of Hi×Li/(Di ×Ni )>=150, where the Hi(kw) is cooling rated output, Li(mm) is the entire heat transfer tube length, Di(mm) is heat transfer tube outer diameter, and Ni is the number of the path.

3. 发明专利

JPH07269972A AIR CONDITIONER AND CONTROLLING METHOD THEREFOR 失效
公开(公告)号：JPH07269972A
公开(公告)日：1995-10-20
申请号：JP6352194
申请日：1994-03-31
申请人： TOSHIBA CORP
发明人： ARAI YASUHIRO , MOTOHASHI HIDEAKI
IPC分类号： F25B13/00
摘要： PURPOSE:To efficiently enhance capacity in a steady operation state from the time of starting cooling/heating by so controlling a circulation composition ratio of mixed refrigerants at the times of starting the cooling/heating and steady operation as to be different. CONSTITUTION:At the time of, for example, heating, high temperature and high pressure refrigerant gas discharged from a compressor 1 is passed through a four-way valve 2, then heat exchanged with indoor air in an indoor heat exchanger 3, condensed, then throttled by a throttle unit 5, and the refrigerant becomes a low pressure gas/liquid two-phase state. Then, the refrigerant heat exchanged, for example, with user side heat source such as an outdoor air by a heat exchanger 4 is evaporated to become low temperature and low pressure gas, passed through an accumulator 6, and compressed to a high temperature and high pressure gas by the compressor 1 in a refrigerating cycle. On the other hand, at the time of cooling, the outdoor heat exchanger 4 becomes the condenser, and the indoor heat exchanger 3 becomes the evaporator. Thus, at the time of starting cooling/heating, a ratio of the refrigerant having excellent performance is enhanced, while at the time of steady operation, a pressure loss is lowered, and an operation of a high efficiency can be executed.

4. 发明专利

JPH07146042A DETECTING DEVICE OF REFRIGERANT COMPONENT RATIO AND AIR-CONDITIONING EQUIPMENT USING THE SAME 失效
公开(公告)号：JPH07146042A
公开(公告)日：1995-06-06
申请号：JP18854394
申请日：1994-08-10
申请人： TOSHIBA CORP
发明人： YAMASHITA TETSUJI , ARAI YASUHIRO , MOTOHASHI HIDEAKI
IPC分类号： G01R29/24 , F25B1/00 , F25B49/02 , G01N27/22
摘要： PURPOSE:To detect a refrigerant component ratio in a refrigerating cycle on a real time basis even when a mixture of refrigerants of three or more kinds is used and to control the refrigerating cycle to be in an optimum condition on the basis of the component ratio. CONSTITUTION:At prescribed positions of a refrigerating cycle, a capacitance detecting means 5 for detecting the specific inductive capacity of a mixed refrigerant, a pressure detecting means 7 for detecting the pressure of the mixed refrigerant and temperature detecting means 6 and 8 for detecting the temperature of the mixed refrigerant at the respective positions of installation of the capacitance detecting means 5 and the pressure detecting means 7 are installed, and a refrigerant component ratio computing means 9 which computes the component ratio of the mixed refrigerant on the basis of detected values of these detecting means 5, 6, 7 and 8 is provided.

5. 发明专利

JPH0719567A AIR CONDITIONER 失效
公开(公告)号：JPH0719567A
公开(公告)日：1995-01-20
申请号：JP16472493
申请日：1993-07-02
申请人： TOSHIBA CORP
发明人： WARASHINA YOSHITAKA , MOTOHASHI HIDEAKI , ISSHIKI MASAO , OOTORI MASAHIKO
IPC分类号： F24F11/02
摘要： PURPOSE:To eliminate a disadvantage caused by employing a heat exchanger temperature sensor and to effect an accurate defrosting by a method wherein a value required for performing an operation is deducted in reference to a result of sensing operation of each of an environment state sensing means and an operating state sensing means and the operation is controlled in response to a result of deduction. CONSTITUTION:An environment state sensing means senses an indoor air temperature and an outdoor air temperature. An operating state sensing means detects an operating time, a speed of an indoor air fan, an operating state of a compressor 1. During a heating operation, a temperature of an outdoor heat exchanger 3 is deducted as a value required for performing a controlling operation in reference to a result of sensing operation of each of both sensing means. The deducting means sets the results of sensing of both sensing means as input data, sets the temperature of the outdoor heat exchanger as a tutor data, wherein this is a neural network in which its study is repeated and generated. A temperature of the outdoor heat exchanger 3 corresponding to the input data is calculated as output data. Then, during the heating operation. Then, an outdoor heat exchanger temperature Te calculated by a deducting means is compared with 0 deg.C, and if the value Te is 0 deg.C or lower, a defrosting operation of the outdoor heat exchanger 3 is carried out.

6. 发明专利

JPH06137712A AIR CONDITIONER 失效
公开(公告)号：JPH06137712A
公开(公告)日：1994-05-20
申请号：JP28893192
申请日：1992-10-27
申请人： TOSHIBA CORP
发明人： MORITA KEIICHI , SUGIYAMA AKIHIKO , HITOSUGI TOSHIAKI , IKETANI JITSUO , YAMAZAKI MASAYA , INOUE MINORU , SUZUKI HIDEAKI , MOTOHASHI HIDEAKI
IPC分类号： F24F1/00 , F24F3/153 , F25B29/00
摘要： PURPOSE:To provide an air conditioner which is capable of solving the shortage of a cooling capacity during cooled air dry operation under the condition when the outdoor temperature is high and carrying out comfortable air conditioning operation. CONSTITUTION:An indoor heat exchanger 5 comprises a first heat exchanger 6 and a second heat exchanger 8 which are installed in parallel to each other and communicated with each other by way of a sub-pulse motor valve 7 (PMV). During cooling and heating operations, the PMV 7 is full-opened so that the refrigerant under the same condition may be distributed to the first and second heat exchangers, thereby forcing the refrigerant to be vaporized or condensed. During slightly cooled dry operation, the sub PMV 7 is throttled so that the first heat exchanger 6 may serve as a reheater while the second heat exchanger 8 may serve as a cooler to vaporize the refrigerant. Under high open air temperature conditions, a PMV 4 is further throttled to a great extent so that the refrigerant condensation temperature in the first heat exchanger 6 may be lowered under control.

7. 发明专利

JPH1163735A REFRIGERATION CYCLE DEVICE 失效
公开(公告)号：JPH1163735A
公开(公告)日：1999-03-05
申请号：JP21779597
申请日：1997-08-12
申请人： TOSHIBA CORP
发明人： ARAKAWA HIROYUKI , MOTOHASHI HIDEAKI , KAWAI NOBUO
IPC分类号： F25B41/00
摘要： PROBLEM TO BE SOLVED: To prevent a wall thickness of a pipe from being increased while a safety factor in strength of the pipe at a high pressure section is being assured by a method wherein a design pressure in each of the pipe becoming a low pressure during operation and refrigeration cycle parts is set lower than that of each of the other pipes and refrigeration cycle parts. SOLUTION: A design pressure in a low pressure side pipe ranging from a downstream side of an evaporator 4 to a suction side of a compressor 1 is set to be lower than a design pressure at a high pressure pipe for use in connecting a discharged side of the compressor 1 to a condenser 2, a capillary tube 3 and an evaporator 4. In addition, a relation between a ratio of an outer diameter D1 and a wall thickness t1 of a high pressure side pipe and a ratio between an outer diameter D2 and a wall thickness t2 of a low pressure side pipe is se to show a satisfactory relation of (D1/t1)

8. 发明专利

JPH1042585A REFRIGERATING CYCLE EQUIPMENT AND INVERTED DEVICE THEREFOR 失效
公开(公告)号：JPH1042585A
公开(公告)日：1998-02-13
申请号：JP2894597
申请日：1997-02-13
申请人： TOSHIBA CORP
发明人： KAMIMURA TOSHIYUKI , SANO TETSUO , MOTOHASHI HIDEAKI , TANAKA HIROYUKI
IPC分类号： F25B1/00 , H02H3/14 , H02M1/12 , H02P6/06 , H02P6/08
摘要： PROBLEM TO BE SOLVED: To reduce high-frequency leakage current without fail, even at a high switching frequency, by detecting a zero-phase current flowing from each phase winding of a brushless direct-current motor to earth creating a current having a waveform similar to that of the zero-phase current to forcibly cancel out the leakage current from the brushless direct-current motor. SOLUTION: Since high-frequency leakage current I1 flows to a direct current circuit 5, the currents, the magnetic of which is in proportion to zero-phase current, are detected using a zero-phase current detector 31. The output voltage of the zero-phase current detector 31 is class A push-pull-amplified using transistor 21, 33 to create a current I2 for canceling out similar to the zero-phase current in waveform. The current I2 for canceling out has such a polarity as to make the said current flow from earth E to a current canceling-out circuit 30. Based on the polarity and waveform, the high-frequency leakage current I1 is absorbed into the current canceling-out circuit 30 and is thereby forcibly canceled out. This enables reducing the high-frequency leakage current I1 without fail, even if the switching frequency of a switching circuit 11 is high.

9. 发明专利

JPH0979671A AIR CONDITIONER 失效
公开(公告)号：JPH0979671A
公开(公告)日：1997-03-28
申请号：JP23833695
申请日：1995-09-18
申请人： TOSHIBA CORP
发明人： FUKUDA TAKESHI , SANO TETSUO , HAYANO MAKOTO , MOTOHASHI HIDEAKI
IPC分类号： F25B1/00
摘要： PROBLEM TO BE SOLVED: To assure a stable lubricating state and improve a reliability in operation by a method wherein an operation of an air conditioner is controlled in such a way that an oil film is hardly cut when an operating frequency is decreased. SOLUTION: This air conditioner comprises a refrigerant circuit 3 in which an HFC refrigerant is circulated by a compressor 1, wherein its operating frequency is selected in reference to an air conditioning load and its rotating speed is variably changed from a low speed rotation to a high speed rotation, and a descending speed of rotation when its operating frequency is decreased is controlled under a value less than 1/9Hz/sec.

10. 发明专利

JPH08100970A REFRIGERATING DEVICE 失效
公开(公告)号：JPH08100970A
公开(公告)日：1996-04-16
申请号：JP23799894
申请日：1994-09-30
申请人： TOSHIBA CORP
发明人： MOTOHASHI HIDEAKI
IPC分类号： F25B49/02
摘要： PURPOSE: To execute a safe operation by discriminating a refrigerator leak of mixed refrigerators, by setting a gas liquid discriminating means of the mixed refrigerators, at an exit section of a condenser in a refrigeration circuit using the mixed gases. CONSTITUTION: At an exit section of a condenser 2 in a refrigeration cycle provided with a compressor 1, a condenser 2, an expansion valve 3, and an evaporator 4, a gas liquid discriminating means 5 detecting a refrigerator leak by discriminating a gas liquid state of mixed refrigerators, is set. As this gas liquid discriminating means 5, an electro-static capacity type sensor 51, making a detection sensitivity high by a plurality of electric pole plates 51a, is used. In a case of a gas refrigerator, a dielectric constant is 1, but in a liquid case, in comparison with a gas case, it becomes 5-10 times value. By detecting a difference of the dielectric constant between this mixed refrigerators liquid and a gas dielectric constant, a gas liquid state can be discriminated. According to this, without relation to a heat source temperature at the condenser 2 side and the evaporator 4 side, a leak of the mixed refrigerators can be surely detected at a stage wherein a leak quantity is little.

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