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1. 发明专利

JPH0678820B2 失效
公开(公告)号：JPH0678820B2
公开(公告)日：1994-10-05
申请号：JP3299886
申请日：1986-02-19
申请人： HITACHI LTD
发明人： NAGAI MAKOTO , HANADA MASAMICHI , HORIUCHI ISAMU , SATO ICHIRO
IPC分类号： F24F13/22 , F24F1/00

2. 发明专利

JPH0428955A AIR CONDITIONER 失效
公开(公告)号：JPH0428955A
公开(公告)日：1992-01-31
申请号：JP13377090
申请日：1990-05-25
申请人： HITACHI LTD
发明人： TAKENAKA HIROSHI , HANADA MASAMICHI , SANO TAKASHI , SATO ICHIRO , HONAMI KAZUHIKO
IPC分类号： F25B1/00
摘要： PURPOSE:To assure an amount of supplying oil to a compressor by a method wherein a high pressure discharging gas is bypassed by a bypassing capillary to an accumulator and refrigerant stored in the accumulator is agitated. CONSTITUTION:When a surrounding air temperature and an indoor air temperature are low during a freezing cycle, an evaporation temperature of an indoor heat exchanger 5 is low during a cooling operation, an evaporating temperature of an outdoor heat exchanger 4 is low during a heating operation, and a refrigerant accumulated in an accumulator shows a low temperature, the refrigerant shows a temperature range where a two-phase separation may easily occur. Thus, normally, a discharging pipe 10 is connected to the first bypassing capillary 8 selected to cause an amount of discharging gas bypassing the accumulator 3 to become appropriate value, thereby the refrigerant in the accumulator 3 is agitated and even if the temperature in the accumulator enters a region where the two-phase separation occurs, a returning amount of oil to the compressor 1 is not decreased and then a stable amount of returning oil to the compressor 1 can be assured.

3. 发明专利

JPH02287061A AIR CONDITIONER 失效
公开(公告)号：JPH02287061A
公开(公告)日：1990-11-27
申请号：JP10445189
申请日：1989-04-26
申请人： HITACHI LTD
发明人： SANO TAKASHI , HANADA MASAMICHI , SATO ICHIRO , TAKENAKA HIROSHI , KOBAYASHI ATSUYASU
IPC分类号： F25B13/00
摘要： PURPOSE:To widen the operational range of an air conditioner and improve its reliability by a method wherein, during the heating operation, the detection of a rise of the temperature of the gas discharged from the compressor by a detector causes a two-way valve to open so as to supply liquid refrigerant to the suction side of the compressor with an effect to lower the temperature of the compressor. CONSTITUTION:There is provided a tank 9 which branches off from a refrigeration cycle between a four-way valve 2 and an indoor heat exchanger 7. In the cooling operation, when refrigerant circulates in a large amount, the tank 9 does not store liquid, whereas, in heating, high-pressure refrigerant gas cooled by the ambient temperature is stored. When refrigerant runs short, generally the influence of the shortage is greater during the heating operation because of lower suction pressure and higher discharge pressure than during the cooling operation; this influence in the operation of the refrigeration cycle comes as a rise of the temperature of the gas discharged from the compressor 1. When a detector 10 detects this influence, a control 11 causes a solenoid valve 12 to open so as to release the liquid refrigerant in the tank 9 to the suction side of the compressor 1 through a capillary 13 so that the temperature of the gas discharged from the compressor 1 is lowered. In this manner, this constitution enables widening the operational range of the air conditioner and improving its reliability.

4. 发明专利

JPS62194130A WATER PAN FOR AIR CONDITIONER 失效
公开(公告)号：JPS62194130A
公开(公告)日：1987-08-26
申请号：JP3299886
申请日：1986-02-19
申请人： HITACHI LTD
发明人： NAGAI MAKOTO , HANADA MASAMICHI , HORIUCHI ISAMU , SATO ICHIRO
IPC分类号： F24F13/22
摘要： PURPOSE:To prevent looseness and instability of component parts to be inserted into a water pan for an air conditioner and at the same time to provide an inexpensive water pan having an internal stress breakage or the like prevented by a method wherein some stays are divided into some sections and inserted into the water pan. CONSTITUTION:A water pan 9 of an air conditioner is provided with stays divided into three sections at both sides thereof. Central stays 8a2 and 8b2 are provided with screw holes for use in fixing an electrical box, fixing holes for use in fixing a suction bell mouth and a hanging fixing hole for use in fixing an ornamental panel for an air blowing port. To its resin material side is spot welded an adding plate 15 bent in an opposite direction so as to prevent the fixed component elements from being dropped. With this arrangement, it is possible to prevent looseness and instability of stays or the like and bosses caused by a variation in temperature. Further, it is also possible to prevent a crack caused by an internal stress breakage generated under a presence of inserted material or the like. Because of a substantial reduction of preparation time for performing a molding operation, the price of the device can be reduced.

5. 发明专利

JPH02279966A AIR CONDITIONER 失效
公开(公告)号：JPH02279966A
公开(公告)日：1990-11-15
申请号：JP10004889
申请日：1989-04-21
申请人： HITACHI LTD
发明人： TAKENAKA HIROSHI , SANO TAKASHI , SATO ICHIRO , KOBAYASHI ATSUYASU
IPC分类号： F24F11/02 , F25B49/02
摘要： PURPOSE:To make it possible to detect promptly and accurately a saturation temperature required to control the degree of superheat by installing an orifice in a saturation temperature detection bypass pipe branched from a discharge gas pipeline, circulating refrigerant said saturation temperature detection bypass pipe, and minimizing the amount of refrigerant to be cooled. CONSTITUTION:When the refrigerant present in a first refrigerant pipeline 7 is liquid, closed pipe 6 is super-heated by its contact with a second refrigerant pipe 8 at high temperature in a refrigerating cycle, which vaporizes and saturates the refrigerant in a first pipeline 1, thereby detecting the saturation temperature in a saturation temperature detection pipe 22. Furthermore, a suction gas temperature detection thermistor 18 detects the temperature of suction gas and calculates the degree of superheat on a control panel 21. When he degree of super heat is small, it reduces the opening of an electronic expansion valve 13; when the degree of super heat is great, it increases the opening of the electronic expansion valve 13, thereby controlling the degree of super heat. An orifice if installed in the first pipeline 1, throttles the amount of liquefied refrigerant entering the first pipeline 1, reduces the amount of heating refrigerant, and detects the saturation temperature, thereby controlling the degree of super heat with accuracy.

6. 发明专利

JPS643442A APPLICATION APPARATUS 失效
公开(公告)号：JPS643442A
公开(公告)日：1989-01-09
申请号：JP15774187
申请日：1987-06-26
申请人： HITACHI LTD
发明人： SATO ICHIRO , HAARI KAZUHIRO
IPC分类号： F24F1/00
摘要： PURPOSE:To improve the cleanliness of air and comfortableness by including an electric precipitator, a humidifier, and a centrifugal air blower into a unit composed of an outer case, a suction port, and an ejecting port. CONSTITUTION:In an outer case 1 combining an air suction port 2, an air ejecting port 3, and a guide for air stream in one, an electric precipitator 4, a humidifier 5, and a centrifugal air blower 6 are arranged to constitute an application unit 7. By the use of the unit 7, the cleanliness of air and humidity control are carried out and the air ejected from the blower 6 carries out the function of a circulator and the temp. distribution in a room is improved. An air conditioner carrying out space cooling and heating in one and consisting of an outer unit composed of a compressor 8, an outdoor unit fan 9, and an outdoor heat exchanger 10 and an indoor unit composed of an indoor unit fan 11 and an indoor heat exchanger 12, and the unit 7 are connected with wiring to link electrically and the two can be operated simultaneously by a remote control switch 13 and then comfortableness can be much more improved by the cleanliness of air, the humidity control, and the circulator effect of the blower.

7. 发明专利

JPS63231123A HEAT EXCHANGER FOR AIR-CONDITIONING MACHINE 失效
公开(公告)号：JPS63231123A
公开(公告)日：1988-09-27
申请号：JP6119587
申请日：1987-03-18
申请人： HITACHI LTD
发明人： NAGAI MAKOTO , HORIUCHI ISAMU , HANADA MASAMICHI , SATO ICHIRO
IPC分类号： F24F1/00
摘要： PURPOSE:To improve comfortability, by a method wherein a plurality of heat exchangers are connected by a communicating tube so that the heat transfer tubes thereof are arranged in series while at least a heat exchanger is connected to the refrigerant pipeline of a refrigerating cycle, in the heat exchangers for a ceiling embedded cassette type air-conditioning machine. CONSTITUTION:Gas refrigerant enters from the refrigerant passage 11-1 of a heat exchanger 6-1 as shown by an arrow sign and is changed in a heat transfer tube from refrigerant of an overheating gas refrigerant area into refrigerant of gas and liquid 2-phase refrigerant area. Then, it flows into the heat exchanger 6-2 through a communicating tube 7a under the condition of the gas and liquid 2-phase refrigerant area and, then, is changed into the condition of overcooled liquid refrigerant area. Subsequently, the refrigerant is returned to the heat exchanger 6-1 through the communicating tube 7b and flows into the refrigerant pipeline of a refrigerating cycle. Accordingly, the overcooled liquid refrigerant area is distributed through the heat exchangers 6-a, 6-2 substantially equally, whereby air with an uniform temperature may be blown off through respective surfaces of air blow-off ports. According to this constitution, the blow-off temperatures of a plurality of blow-off ports may be equalized and the comfortability of an air-conditioning machine may be improved.

8. 发明专利

JPS63107489A CONTROL CIRCUIT FOR FAN MOTOR 失效
公开(公告)号：JPS63107489A
公开(公告)日：1988-05-12
申请号：JP25177586
申请日：1986-10-24
申请人： HITACHI LTD
发明人： NAGAI MAKOTO , TERADA HIROKIYO , HORIUCHI NORIAKI , HANADA MASAMICHI , SATO ICHIRO
IPC分类号： F04D27/00 , F24F11/04 , F24F11/62 , F24F11/74 , H02P21/05 , H02P23/00 , H02P23/04 , H02P23/07 , H02P25/04
摘要： PURPOSE:To prevent electromagnetic noise from being generated from a fan motor due to the distortion of the magnetic field of the motor by providing individual capacitors at taps for a superlow speed and other speeds of the motor. CONSTITUTION:A fan motor 1 rotates when any of control relay coils 4Hi-4 SLo of Hi (high speed), Me (medium speed), Lo (low speed) and an SLo (superlow speed) is excited. When the rotation of the motor 1 is in a range of the Hi, Me and Lo, a switching relay contact 6 is connected to a contact 6a, and a rotating magnetic field is corrected through a capacitor 7. Only when the rotation of the motor 1 is selected to the SLo, the contact 6 is connected to a contact 6b to correct the rotating magnetic field through a capacitor 8 having a large capacity.

9. 发明专利

JPS62194129A AIR CONDITIONER 失效
公开(公告)号：JPS62194129A
公开(公告)日：1987-08-26
申请号：JP3299986
申请日：1986-02-19
申请人： HITACHI LTD
发明人： NAGAI MAKOTO , HANADA MASAMICHI , SATO ICHIRO , SASAKI TOSHIHARU
IPC分类号： F24F13/22
摘要： PURPOSE:To reduce the amount of remaining water at a drain port and decrease the degree of forming of ice by a method wherein a shape of an extremity end of drain port of an air conditioner is machine worked to have an irregular shape. CONSTITUTION:An irregular shape is applied in the direction of height of burring of a drain port 4 of an air conditioner, a certain volume of dew 2 is collected at the convex portion and then the dew is dropped by its own weight. An extremity end of a drain port 4 is made as a corrugated form, a minimum radius of curvature R1 of a recess portion and a minimum radius of curvature R2 of a projecting portion are applied to have a relation of R1>=R2. With this arrangement, an amount of remaining dew becomes quite low and an amount of iced water at an extremity end of the drain port is also decreased. With this arrangement, no trouble is found at each of the component elements during a period when a temperature of an air conditioner is increased up to a surrounding atmosphere temperature under which an operation of the air conditioner is assured and so an operation of the air conditioner can be continued.

10. 发明专利

JPH0443167B2 失效
公开(公告)号：JPH0443167B2
公开(公告)日：1992-07-15
申请号：JP6119587
申请日：1987-03-18
申请人： HITACHI LTD
发明人： NAGAI MAKOTO , HORIUCHI ISAMU , HANADA MASAMICHI , SATO ICHIRO
IPC分类号： F24F1/00

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