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公开(公告)号：JPH03260527A
公开(公告)日：1991-11-20
申请号：JP5537290
申请日：1990-03-07
Applicant: MATSUSHITA REFRIGERATION
Inventor： TAKAHASHI TAKAHIRO , KURACHI MASAO
IPC: F24F5/00
Abstract: PURPOSE:To obtain an airconditioning apparatus which has a direction of circulating a refrigerant in a user's refrigerant cycle reversible simply with a unidirectional refrigerant conveying device by arranging a third valve in parallel with a second valve and a refrigerant conveying device and a fourth valve in parallel with a first valve and the refrigerant conveying device. CONSTITUTION:In the cooling operation, a first valve 13a and a second valve 13b are opened while a third valve 13c and a fourth valve 13d are closed and in the heating operating, the valves are opened and closed in an opposite sequence, which makes the direction of circulation reversible in a user's side refrigerant cycle even when a refrigerant conveying device is unidirectional. In such a manner, the direction of circulation in the user's side refrigerant cycle can be made reversible with the opening or closing of four inexpensive valves such as solenoid valves even when the refrigerant conveying device in the user's side refrigerant cycle is unidirectional, thereby achieving inexpensiveness with a simple construction of the refrigerant conveying device.
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公开(公告)号：JPH03113248A
公开(公告)日：1991-05-14
申请号：JP25272289
申请日：1989-09-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： KATAGIRI OSAMU , KURACHI MASAO , TAKAHASHI TAKAHIRO
IPC: F25B13/00
Abstract: PURPOSE:To prevent a compressor from being interrupted in its operation upon starting of heating operation by providing a heat source side refrigerant cycle and a utilization side refrigerant cycle, and further providing a control device for opening a solenoid valve for a predetermined time upon the strating of the heating operation and the solenoid valve provide in parallel to a heating pressure reduction device. CONSTITUTION:A solenoid valve 13 is provided in parallel to a heating pressure reduction device 5, which valve is opened for a predetermined time upon starting of heating operation by a control device 14. Accordingly, the amount of pressure reduction is reduced to lower the exchanged heat (amount of heat absorption) in a heat source side heat exchanger 3 and hence lower the amount of exchanged heat (amount of heat dissipation) in a first auxiliary heat exchanger 8. Thus, high pressure can also be lowered. Hereby, a compressor is prevented from being interrupted, the high pressure being raised upon the strating of the heating operation.
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公开(公告)号：JPH03113246A
公开(公告)日：1991-05-14
申请号：JP25273189
申请日：1989-09-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： TAKAHASHI TAKAHIRO , KURACHI MASAO
IPC: F25B13/00
Abstract: PURPOSE:To prevent a compressor from being interrupted in its operation upon starting of heating by providing a heat source side refrigerant cycle and a utilization side refrigerant cycle, and further providing a pressure regulating valve for allowing refrigerant to flow through at predetermined pressure in parallel to a heating pressure reduction device. CONSTITUTION:A pressure regulating valve 13 is provided in parallel to a heating pressure reduction device 5. Mush gas refrigerant mixes into an inlet side of a refrigerant carrier device 11 in heating operation to reduce the amount of carried refrigerant. Thereupon, the pressure regulating valve 13 is actuated when the amount of heat exchange in a second auxiliary heat exchanger 9 is reduced and high pressure in a heat source side refrigerant cycle rises and gets predetermined pressure, whereby refrigerant is allowed to flow through in parallel to the heating pressure reduction device 11. Accordingly, the amount of pressure reduction is reduction to low the amount of exchange heat (amount of heat absorption) in a heat source side heat exchanger 3 and hence the amount of exchanged heat (amount of heat dissipation) in a first auxiliary heat exchanger 8. Thus, high pressure can also be reduced. Hereby, a compressor is prevented from being interrupted even through the capability of the refrigerant carrier device is deteriorated upon strating of heating operation.
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公开(公告)号：JPH03113244A
公开(公告)日：1991-05-14
申请号：JP25272489
申请日：1989-09-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： TAKAHASHI TAKAHIRO , KURACHI MASAO
IPC: F25B13/00
Abstract: PURPOSE:To prevent a compressor from being interrupted in its operation upon starting heating by providing a heat source side refrigerant cycle and a utilization side refrigerant cycle, and providing a control device for opening a solenoid valve provided in parallel to a heating pressure reduction device by difference pressure detector device between inlet and outlet pressures in a refrigerant carrier device. CONSTITUTION:A difference pressure detector device 14 is actuated as pressure difference between inlet pressure and outlet pressure in a refrigerant carrier device 11 becomes less than a predetermined valve owing to reduction of the amount of carried refrigerant, and hence a control device 15 opens a solenoid valve 13. Accordingly, the amount of pressure reduction is lowered to reduce the amount of exchanged heat (amount of heat absorption) in a heat source side heat exchanger 3 and further reduce the amount of exchanged heat (amount of heat dissipation) in a first auxiliary heat exchanger 8. Thus, high pressure can also be lowered. Hereby, a compressor is prevented from being interrupted even through capability of the refrigerant carrier device is deteriorated for a predetermined time upon starting of heating operation.
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公开(公告)号：JPH037828A
公开(公告)日：1991-01-16
申请号：JP14173589
申请日：1989-06-02
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO , TAKAHASHI TAKAHIRO
Abstract: PURPOSE:To allow freely selecting cooling or heating operation at each room unit by a method wherein a heat source side refrigerant cycle is separated from a service side one, and an outdoor unit, main room units, a heat source side and an auxiliary heat source side unit, and auxiliary room units are arranged. CONSTITUTION:In the title apparatus, a heat source side refrigerant cycle is separated from a service side refrigerant cycle, and the apparatus consists of an outdoor unit (f), main room units 24, an auxiliary heat source side unit 32, and auxiliary room units 36. The outdoor unit (f) includes a second auxiliary heat exchanger 19 and a refrigerant transfer device 21 by which the refrigerant and heat are circulated between the heat source side and service side refrigerant cycles, and the main room unit 24 is equipped with a service side heat exchanger 23 and others and performs the same operation as that of the heat source side refrigeration cycle. The auxiliary heat source side unit 32 consists of a third auxiliary heat exchanger 26 and an auxiliary refrigerant cycle composed of a fourth auxiliary heat exchanger 27, an auxiliary compressor 28, an auxiliary heat source side pressure reducer 30 and an auxiliary four-way valve 29 which are connected to each other to form a loop. The auxiliary heat exchangers 26 is arranged parallel to a service side heat exchanger 23 so as to exchange heat with the service side refrigerant cycle. The auxiliary heat exchangers 26 and 27 are built in one package and heat exchange takes place between them. The auxiliary heat source side unit 32 and the auxiliary room unit 36 are capable of performing either the same operation as that of the heat source side unit or the different one. By this constitution, each room unit is allowed to selectively perform either cooling or heating operation with a single outdoor unit.
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Patent Agency Ranking
公开(公告)号：JPH037827A
公开(公告)日：1991-01-16
申请号：JP14173489
申请日：1989-06-02
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO
Abstract: PURPOSE:To allow freely selecting cooling or heating operation at each room unit by a method wherein a heat source side refrigerant cycle is separated from a service side one, and an outdoor unit, main room units, a heat source side and an auxiliary heat source side unit, and auxiliary room units are arranged. CONSTITUTION:In the title apparatus, a heat source side refrigerant cycle is separated from a service side refrigerant cycle, and the apparatus consists of an outdoor unit (f), main room units 24, an auxiliary heat source side unit 32, and auxiliary room units 36. The outdoor unit (f) includes a second auxiliary heat exchanger 19 and a refrigerant transfer device 21 by which the refrigerant and heat are circulated between the heat source side and service side refrigerant cycles, and the main room unit 24 is equipped with a service side heat exchanger 23 and others and preforms the same operation as that of the heat source side refrigerant cycle. The auxiliary heat source side unit 32 consists of a third auxiliary heat exchanger 26 and an auxiliary refrigerant cycle composed of a fourth auxiliary heat exchanger 27, an auxiliary compressor 28, an auxiliary heat source side pressure reducer 30 and an auxiliary four-way valve 29 which are connected to each other to form a loop. The auxiliary heat exchangers 26 and 27 are built unitarily and heat exchange takes place between them. The auxiliary heat source side unit 32 and the auxiliary room unit 36 are capable of performing either the same operation as that of the heat source side unit or as the different one. By this constitution, each room unit is allowed to selectively perform cooling or heating operation with the single outdoor unit (f).
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公开(公告)号：JPH02178543A
公开(公告)日：1990-07-11
申请号：JP33450188
申请日：1988-12-28
Applicant: MATSUSHITA REFRIGERATION
Inventor： TAKAHASHI TAKAHIRO , KURACHI MASAO
Abstract: PURPOSE:To realize liquid refrigerant lubrication both in cooling and heating operation by a method wherein a refrigerant transfer unit is of a closed unlubricated type and located downstream a second sub-heat exchanger in cooling operation. CONSTITUTION:In cooling operation, a closed unlubricated type refrigerant transfer unit 13 is located downstream a second sub-heat exchanger 9, a large amount of condensed liquid refrigerant is directly sucked from pipe A22 to a pump chamber through a refrigerant buffer tank 10, and then pumped from a port 24 to a closed vessel 16. The refrigerant pumped is sent from the closed vessel 16 to an user-side heat exchanger through a pipe B23. In heating operation, the refrigerant transfer unit 13 is located downstream the user-side heat exchanger, and the condensed refrigerant is sent from the pipe B into the closed vessel 16, sucked from port 24 into the pump chamber, and sent from pipe 22A to the refrigerant buffer tank 10.
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公开(公告)号：JPH0244131A
公开(公告)日：1990-02-14
申请号：JP19659788
申请日：1988-08-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANAKA MASAYUKI , KURACHI MASAO
Abstract: PURPOSE:To enable reductions in a piping time and in a piping space by connecting an exterior unit and an interior unit to each other by one double pipe. CONSTITUTION:In a heating operation, a refrigerant cycle is established. In the refrigerant cycle on the heat source side, a high-temperature high-pressure refrigerant from a compressor 13 is fed through a four-way valve 14 to a first auxiliary heat exchanger 20, where it is condensed into a liquid by releasing heat. The liquefied refrigerant is decompressed while being fed through a check valve 19 into a heating decompressor 17, is then evaporated through heat absorption in an exterior heat exchanger 15, and the evaporated refrigerant is circulated through the four-way valve 14 to the compressor 13. In this case, a second auxiliary heat exchanger 12 in the refrigerant cycle on the utilization size exchanges heat with the heat exchanger 20, whereby a refrigerant on the utilization size is evaporated through heating, and the refrigerant with less liquid is passed through an annular refrigerant passage (c) in a double pipe to a heat exchanger 24 on the utilization side, where it is liquefied through releasing heat, thereby heating. The resultant liquid-rich refrigerant is passed through a central refrigerant passage c' in the double pipe to a refrigerant feeder 23, and is recirculated through a refrigerant quantity regulating tank 22 to the heat exchanger 21. In this case, as in the case of cooling, there is little difference in refrigerant temperature or pressure between the annular passage (c) and the central passage c' in the double pipe, and only a difference in dryness exists therebetween.
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公开(公告)号：JPH01306749A
公开(公告)日：1989-12-11
申请号：JP13885088
申请日：1988-06-06
Applicant: MATSUSHITA REFRIGERATION
Inventor： KURACHI MASAO
Abstract: PURPOSE:To perform pleasant air conditioning with little variations in room temperature, by separating a heat source side refrigerant cycle and a utilization side refrigerant cycle from each other, and providing a motor-driven three-way valve capable of varying a flow-dividing ratio in each of a plurality of interior units provided in the utilization side refrigerant cycle. CONSTITUTION:First passages 31a, 32b extending to utilization side heat exchangers 22a, 22b are connected to second passages 33a, 33b, bypassing the heat exchangers 22a, 22b, and to common third passage 34a, 34b by motor-driven three-way valves, respectively, whereby flow-dividing ratios for the third passages 34a, 34b, the first passages 32a, 32b and the second passages 33a, 33b can be varied. Namely, though the quantities of a refrigerant supplied to the heat exchangers 22a, 22b can be varied according to load detectors 24a, 24b, the quantities of the refrigerant supplied to interior units (g), (h) are not varied. Thus, a stable operation can be performed, without any effects on a refrigerant feeder.
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公开(公告)号：JPH01306741A
公开(公告)日：1989-12-11
申请号：JP13884688
申请日：1988-06-06
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANAKA MASAYUKI , KURACHI MASAO
Abstract: PURPOSE:To plan the time reduction of piping work and the reduction of a piping space by arranging an outdoor unit provided with a second auxiliary heat exchanger, a refrigerant carrier device and the like of a heat source side refrigerant cycle and a utilizing side refrigerant cycle, an indoor unit provided with an indoor heat exchanger and the like and a piece of much liquid connecting piping and a piece of little liquid piping in same insulating material. CONSTITUTION:A piece of little liquid connecting piping (c) and a piece of much liquid connecting piping (c') are combined by a heat insulator 25 to insulate. At the time of cooling operation a second auxiliary heat exchanger 21 and a first auxiliary heat exchanger 20 of a utilizing side refrigerant cycle are heat-exchanged, gas refriger ant in the utilizing side refrigerant cycle is cooled to liquidize, becomes a much liquid state, flowed through a refrigerant quantity regulating tank 22, transmitted to the much liquid connecting piping (c') by a refrigerant carrier device 23, heat-absorbed and evaporated by an indoor heat exchanger 24 to cool, gasfied to be a little liquid state and circulated in the second auxiliary heat exchanger 21 through the little liquid connecting piping (c). At this time the refrigerant almost has no difference between temperatures and pressures and there is a difference between drynesses thereof alone in the little connecting piping (c) and the much liquid connecting piping (c').
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