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1. 发明专利

JPH03186154A REFRIGERATING PLANT 失效
公开(公告)号：JPH03186154A
公开(公告)日：1991-08-14
申请号：JP32143489
申请日：1989-12-13
申请人： HITACHI LTD
发明人： YASUDA HIROSHI , ISHIHANE KYUHEI , KOKUNI KENSAKU , NAKAYAMA SUSUMU , NAMIKATA RUMI , CHIAKI TAKAO , TAGA YOSHIAKI , TAKAGI HIROSHI
IPC分类号： F25B1/00
摘要： PURPOSE:To enable stabilized refrigerant flow rate control over a wide operation range by providing a fuzzy inference processor that incorporates a control rule, computes an open manipulated variable of a motor-driven expansion valve and outputs the calculated value. CONSTITUTION:A differential temperature of refrigerant during refrigerant cycling is detected with refrigerant differential temperature detectors 6 and 7. On the other hand, a control rule about an open manipulated variable of motor driven-expansion value 3 based on an experience rule is stored in advance in a memory device 11 of a control device 5 in an attempt to correspond with information about the refrigerant differential temperature. A fuzzy inference processor 10 incorporates information about refrigerant differential temperature from the detection means 7 and 8 and a control rule equivalent to the information from a memory device 11. From these two pieces of information, the processor computes an open manipulated variable to be given to the motor-driven expansion valve 3 and outputs. It is, therefore, possible to carry out stabilized refrigerant flow rate control over a wide operation range by computing the open manipulated variable of the motor-driven expansion valve 3 based on the control rule obtained from the rule of experience.

2. 发明专利

JPH04347471A DETERMINING METHOD OF NECESSARY SEALING AMOUNT OF REFRIGERANT FOR REFRIGERATING CYCLE AND DEVICE THEREFOR AS WELL AS NECESSARY AMOUNT OF REFRIGERANT SEALING DEVICE 失效
公开(公告)号：JPH04347471A
公开(公告)日：1992-12-02
申请号：JP11875291
申请日：1991-05-23
申请人： HITACHI LTD
发明人： NAKAYAMA SUSUMU , YASUDA HIROSHI , KOKUNI KENSAKU , NAMIKATA RUMI , URATA KAZUMIKI , ISHIHANE KYUHEI , KATSUMATA NAOTO
IPC分类号： F25B45/00
摘要： PURPOSE:To determine the necessary sealing amount of refrigerant for a refrigerating cycle properly and, further, seal the necessary amount-of refrigerant even when the length of a liquid pipeline is not known. CONSTITUTION:In a refrigerating cycle, consisting of an outdoor machine 8, indoor machines 9, 10, a liquid pipeline 11 and a gas pipeline 12 and into which refrigerant is not sealed yet, expansion valves 8a, 9a, 10a and an on/off valve 13 for servicing are fully opened. In this case, a pressure P2 in the refrigerating cycle is an atmospheric pressure in this example. Next, when a sealed vessel 2, into which the air of a pressure P1 is sealed and whose internal volume V1 is known, is connected to the valve 13 through a connecting tube 7 and a valve 6 is opened to communicate the refrigerating cycle with the sealed vessel 2, the pressures of both of them are balanced. A pressure P3 that time and the air pressure P1 are detected by a pressure detector 3. A microcomputer 4 operates the internal volume of the refrigerating cycle from differences P1-P3, P3-P2, and the internal volume V1 and, further, operates the necessary sealing amount of refrigerant for the refrigerating cycle employing known functional relations, then, indicates them on an indicating device 5. Thereafter, the device is evacuated and the necessary amount of refrigerant is sealed automatically from a bomb into the refrigerating cycle in some embodiment.

3. 发明专利

JPH03294752A AIR CONDITIONER 失效
公开(公告)号：JPH03294752A
公开(公告)日：1991-12-25
申请号：JP9422390
申请日：1990-04-10
申请人： HITACHI LTD
发明人： NAKAYAMA SUSUMU , KOKUNI KENSAKU , MURAMATSU MASATOSHI , URATA KAZUMIKI , TOGUSA KENJI , NAMIKATA RUMI , HIBINO YOZO
IPC分类号： F25B6/02 , F25B5/02 , F25B13/00
摘要： PURPOSE:To eliminate a capacity unbalance even if high and low difference exists between installing positions by increasing the resistance of a refrigerant passage of an indoor unit disposed at a high position larger than that of the passage of an indoor unit disposed at a low position. CONSTITUTION:Liquid refrigerant discharged from an indoor heat exchanger 21 is fed out of an indoor unit 2 through a throttle member 23. Liquid refrigerants discharged from indoor units 2, 3 are passed through a liquid tube 5, introduced into an outdoor unit 1, reduced under pressure by a room heating expansion valve 3, heat exchanged with the outdoor air by an outdoor heat exchanger 12 to become low pressure gas, which is sucked to a compressor 11, compressed by the compressor 11 to become high temperature and high pressure refrigerant gas, which is again discharged. If high and low difference exists at between the mounting positions of the units 2 and 3, the refrigerant pressure at the outlet side of the unit 3 becomes higher by liquid head H than that of the unit 2, the refrigerant pressure at the unit 3 becomes lower at the difference between the inlet side pressure P1 and the outlet side pressure P2, refrigerant flow rate is reduced, and the refrigerant flow rate of the unit 2 is increased that much. Therefore, a throttle member 23 is added to the unit 2.

4. 发明专利

JPH02169935A AIR CONDITIONER 失效
公开(公告)号：JPH02169935A
公开(公告)日：1990-06-29
申请号：JP32335288
申请日：1988-12-23
申请人： HITACHI LTD
发明人： KURODA SHIGEAKI , KOKUNI KENSAKU , NAMIKATA RUMI , MATSUO KAZUYA , HIRABAYASHI SHIGERU
IPC分类号： F24F1/00
摘要： PURPOSE:To correspond to the dwelling of an office and the like while making it possible to effect air conditioning for a person to be air-conditioned by incorporating a heat exchanger and a two-way blowing-off thin type centrifugal blower in the inside of an air conditioning unit body and providing air outlets in at least both the side parts thereof. CONSTITUTION:Since air outlets 10a, 10c in two stages of up and down are provided on both the side part of an air conditioning unit body 1, an air outlet 10b is set on the upper part thereof, the direction of a wind variable plate 5 is changed during cooling operation and heating operation, during cooling operation air is blowed off from the upper-stage outlet 10a of both the side parts and the upper-part outlet 10b and during heating operation air from the lower-stage outlet 10c thereof, comfortable air-conditioning can be performed. In addition, since a heat exchanger 2 is arranged at the lower part of the inside of the air conditioning unit body 1, a blower 3 is set at the upper part thereof and a two-way blowing-off thin type centrifugal blower is used for the blower 3, the air-conditioning unit can be made in approximately the same size as the low partition of an office and the like.

5. 发明专利

JPH02146450A AIR CONDITIONER 失效
公开(公告)号：JPH02146450A
公开(公告)日：1990-06-05
申请号：JP29811988
申请日：1988-11-28
申请人： HITACHI LTD
发明人： NAMIKATA RUMI , KOKUNI KENSAKU , KURODA SHIGEAKI , NAKAYAMA SUSUMU , CHIAKI TAKAO
IPC分类号： F24F11/02
摘要： PURPOSE:To improve a comfortable feeling by a method wherein a sensor is arranged for measuring a surface temperature of a human body within an air conditioned space, and a measured value of this sensor is sent to a system for controlling an operation of an air conditioner. CONSTITUTION:A radiation thermometer 2 may measure a surface temperature of a human body 5 and send its measured value to a system for controlling an operation of an air conditioner 1. This system is provided with a converter 6 and a controlling microcomputer 7 for an air conditioner 1. The converter 6 may convert and surface temperature of a human body measured by a radia tion thermometer 2 into a predetermined output signal and send it to a control ling microcomputer 7. The controlling microcomputer 7 may determine an operating condition of the air conditioner 1 in response to a predetermined discriminating condition in reference to an output signal relating to the surface temperature of the human body sent from the converter 6.

6. 发明专利

JPH01305239A AIR CONDITIONER 失效
公开(公告)号：JPH01305239A
公开(公告)日：1989-12-08
申请号：JP13273388
申请日：1988-06-01
申请人： HITACHI LTD
发明人： NAMIKATA RUMI , KURODA SHIGEAKI , KOKUNI KENSAKU
IPC分类号： F24F1/00
摘要： PURPOSE:To allow the cold/hot air outlet of air conditioner to be used as a pleasant interior design object by disguising same as interior design objects such as a tree or flower box, etc., by forming the cold/hot air passage to the outlet with several pipes. CONSTITUTION:Under the cooling mode operation, the room air is taken in by a fan 2 to exchange heat with refrigerant in a heat exchanger 3, and the cooled and dehumidified air is delivered from the unit 1. A pot 4 for an artificial tree 6 is attached to the air outlet. The cold air passes through the pipe disposed in the center of the pot 4, and the cold air 92 is delivered from holes drilled in the pipe 5 to cool the room. In this case, a cold/hot air reversing valve 10 is open. Under the heating mode operation, on the other hand, the valve 10 is fully closed or half closed. Therefore, the hot air 93 delivered from the unit 1 is inhibited to flow upwardly, but is blown near to the floor out of holes in the pot ahead of the valve 10. By operating the valve 10, cold air can be delivered from above, and hot air from under.

7. 发明专利

JPH01225839A AIR CONDITIONER 失效
公开(公告)号：JPH01225839A
公开(公告)日：1989-09-08
申请号：JP4952388
申请日：1988-03-04
申请人： HITACHI LTD
发明人： KURODA SHIGEAKI , KOKUNI KENSAKU , NAMIKATA RUMI , ITAGAKI MASATO , CHIAKI TAKAO
IPC分类号： F24F1/00
摘要： PURPOSE:To obtain an air conditioner giving a comfortable atmosphere and capable of being used as an interior decoration, by providing an interior utensil such as an artificial tree, a flower box, a flowerpot, a flowerpot base and an object with a diffuser for blowing off a cold or hot air flow supplied from an air conditioner. CONSTITUTION:Room air is sucked in by a fan 2, is subjected to heat exchange with a refrigerant at a heat exchanger 3, and cooled and dehumified air is blown off from a room unit 1. A flowerpot 4 for an artificial tree 6 is fitted to a diffuser of the unit 1, cold air is passed through a pipe 5 provided in a central part of the flowerpot 4, and the cold air 92 is blown off through a plurality of holes formed in the pipe 5, thereby cooling a room. In this case, a cold/hot air switching valve 10 is opened. At the time of a heating operation, the valve 10 is fully or half closed, whereby hot air can be blown off from a lower part. Also, it is possible to blow off cold or hot air through a separate diffuser unit 8 by extending a duct 18 from the unit 1. Thus, the cold/hot air diffuser ports are provided as parts of the artificial tree 6, so that an air conditioner can be obtained which gives a comfortable atmosphere and is capable of being used as an interior decoration.

8. 发明专利

JPH03186170A REFRIGERATING MACHINE AND REFRIGERANT AMOUNT INDICATING METHOD IN REFRIGERATING MACHINE 失效
公开(公告)号：JPH03186170A
公开(公告)日：1991-08-14
申请号：JP32143989
申请日：1989-12-13
申请人： HITACHI LTD
发明人： KOKUNI KENSAKU , NAKAYAMA SUSUMU , YASUDA HIROSHI , NAMIKATA RUMI , URATA KAZUMIKI , MURAMATSU MASATOSHI , CHIAKI TAKAO , TOGUSA KENJI
IPC分类号： F25B45/00 , F25B13/00 , F25B49/00 , F25B49/02
摘要： PURPOSE:To provide ease of refrigerant filling work and inspection work and maintain an adequate amount of refrigerant for improving the performance of refrigerating cycle by indicating not only judgment of excess, adequacy or shortage of the refrigerant amount but also the excess or shortage amount. CONSTITUTION:A detector B which detects the refrigerant amount in a refrigerating cycle, an arithmetic device C which compares the refrigerant amount detected by the detector B with the required amount of refrigerant in the refrigerating cycle and calculates an excess or shortage amount of refrigerant in the refrigerating cycle, and an indicator D which indicates the excess or shortage amount of refrigerant in the refrigerating cycle obtained by the arithmetic device C are provided. The detected refrigerant amount in the refrigerating cycle is compared with the required refrigerant amount in the refrigerating cycle, and an excess or shortage amount of refrigerant in the refrigerating cycle is indicated. Therefore, a make-up amount or excess amount of refrigerant can be properly determined during refrigerant filling work so that the refrigerant amount is easily increased or reduced to an adequate refrigerant amount.

9. 发明专利

JPH0379930A AIR CONDITIONER 失效
公开(公告)号：JPH0379930A
公开(公告)日：1991-04-04
申请号：JP21509889
申请日：1989-08-23
申请人： HITACHI LTD
发明人： URATA KAZUMIKI , MURAMATSU MASATOSHI , KOKUNI KENSAKU , YASUDA HIROSHI , NAKAYAMA SUSUMU , NAMIKATA RUMI
IPC分类号： F24F13/28
摘要： PURPOSE:To perform an automatic cleaning of inner stain at the most suitable cleaning time by providing a discriminating means for discriminating a degree of stain inside a main body of an air conditioner in response to an output signal from a sensor, and a stain acknowledgement means for sensing stain inside the main body of the air conditioner in response to an output signal from the discriminating means. CONSTITUTION:Sensors 80 and 81 for sensing a stain inside the main body of an air conditioner have pressure sensors, for example. One sensor 80 is placed at front inlet sides of a filter 5 within a housing 1 and a heat exchanger 6, the other sensor 81 is placed at rear outlet sides of the filter 5 of the housing 1 and the heat exchanging 6. The pressure sensor 80 may detect inlet side pressures at the filter 5 and the heat exchanger 6. The outlet side pressure sensor 81 may detect the outlet side pressures of the filter 5 and the heat exchanger 6 and output its detected signal to the discriminating device 9. Ac knowledging device 9 to acknowledge a stain inside the main body of the air conditioner, resulting in that the most suitable cleaning time is acknowledged and the inside stain is automatically cleaned.

10. 发明专利

JPH0375459A MULTIPLE AIR CONDITIONER 失效
公开(公告)号：JPH0375459A
公开(公告)日：1991-03-29
申请号：JP21193789
申请日：1989-08-17
申请人： HITACHI LTD
发明人： NAKAYAMA SUSUMU , KOKUNI KENSAKU , YASUDA HIROSHI , NAMIKATA RUMI , URATA KAZUMIKI , MURAMATSU MASATOSHI , TOGUSA KENJI , CHIAKI TAKAO , TERADA HIROKIYO , KITANI FUMIHIKO
IPC分类号： F25B13/00
摘要： PURPOSE:To make a multiple air conditioner having an outdoor unit with a wide applicability available whereby the capacity of the outdoor heat exchanger can be accommodated to the capacity of indoor units by providing a plurality of outdoor heat exchangers each with an opening-adjustable outdoor expansion valve in a setup to adjust the number of outdoor heat exchangers in use to the number of indoor units in operation. CONSTITUTION:When, in a setup with two outdoor heat exchangers 11a, 11b, all the indoor units are put in operation, both the two outdoor heat exchangers are put to use with two outdoor heat exchangers are put to use with two outdoor expansion valves 21a, 21b opened. When some of the indoor units, denoted, for example, by 2, 3 and 4, are put in operation while the other are held at rest, only one of the outdoor heat exchangers is put to use with one outdoor expansion valve opened and the other outdoor expansion valve closed. Likewise, to a change in the capacity of the indoor units put into connection, the capacity of the outdoor heat exchanger can be adjusted by closing an outdoor expansion valve. This constitution dispenses with the need to change the outdoor unit according to the number or the capacity of the indoor unite put into connection and widens the applicability of an outdoor unit.

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