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    • 3. 发明专利
    • REFRIGERANT-HEATING MULTI-ROOM AIR CONDITIONING SYSTEM
    • JPH0763433A
    • 1995-03-10
    • JP21200793
    • 1993-08-27
    • TOSHIBA CORPTOSHIBA AVE KK
    • TOYODA MASAKISAKUMA TSUTOMUSAITO KAZUOABE YUJI
    • F24F11/02F25B13/00
    • PURPOSE:To stabilize the cycle and improve the durability of a refrigerant heater by deciding the number of refrigerant heaters to be operated according to the number of the indoor apparatuses at work. CONSTITUTION:The number of the indoor apparatuses 7a, 7b, 7c at work is detected and according to the detected result the number of refrigerant heaters 11a, 11b to be operated is decided. To put it more specifically, a controller 37 detects in what state the indoor apparatuses 7a, 7b, 7b are as regards their operation and how many of them are at work from signals representing demands in rooms transferred from local demand-transferring devices 39a, 39b, 39c provided at the respective indoor apparatuses 7a, 7b, 7c. Preliminarily in the controller 37 a table is incorporated as a means by which and according to the number of the indoor apparatuses at work it is decided how many of the refrigerant heaters 11a, 11b are to be operated (by combustion); information thus decided relating to the operation of the refrigerant heaters 11a, 11b is transmitted to a receiver 41 of the refrigerant heaters 11a, 11b. As a result, the cycle can be stabilized and the durability of the refrigerant heaters 11a, 11b can be improved.
    • 4. 发明专利
    • JPH05346271A
    • 1993-12-27
    • JP15461092
    • 1992-06-15
    • TOSHIBA CORPTOSHIBA AVE KK
    • ABE YUJITOYODA MASAKISAITO KAZUOSAKUMA TSUTOMU
    • F25B13/00
    • PURPOSE:To control the degree of superheat to be constant by a method wherein the revolution numbers of respective compressors are controlled in response to the change of a detected degree of superheat when the change of the degree of superheat of a refrigerant heater is small and in response to the value itself of the degree of superheat when the change of the degree of superheat is large. CONSTITUTION:A degree-of-superheat detector detects the degree of superheat of a refrigerant heater 3, and a degree-of-superheat change calculator calculates the change of the detected degree of superheat. Then, a compressor control means controls the revolution number of a compressor 5 in response to the change of the degree of superheat when the change of the degree of superheat of the refrigerant heater 3 is small, and controls the revolution number of the compressor 5 in response to the degree of superheat value itself when the change of the degree of superheat is large. By this method, even when the cycle is unstable, the degree of superheat of the refrigerant heater 3 can be properly controlled to be uniform.
    • 6. 发明专利
    • MULTI AIR CONDITIONER
    • JPH06207761A
    • 1994-07-26
    • JP146393
    • 1993-01-08
    • TOSHIBA CORPTOSHIBA AVE KK
    • SAKUMA TSUTOMUSAITO KAZUOABE YUJITOYODA MASAKI
    • F24F11/02F25B13/00
    • PURPOSE:To enable an operation to be carried out in response to a required capability of each of indoor devices by a method wherein a flow rate of refrigerant is controlled in response to each of indoor temperatures during a cooling operation. CONSTITUTION:A capability control during a cooling operation is carried out by liquid side proportional control valves 5a, 5b and 5c. A degree of opening of each of the valves is approximately equal to a ratio of required capability of each of indoor devices 4a, 4b and 4c. Then, in the case where a plurality of indoor devices 4a, 4b and 4c are operated, bypass valves 7a, 7b and 7c corresponding to the indoor devices 4a, 4b and 4c where maximum required capability in the required capabilities got from each of the indoor devices 4a, 4b and 4c are opened. This required capability is determined in response to a temperature difference between the indoor temperature and a set temperature set by a user under an operation of a remote controller and the like. With such an arrangement as above, it is possible to perform an operation in response to the required capability of each of the indoor devices 4a, 4b and 4c.
    • 8. 发明专利
    • COOLING AND HEATING APPARATUS
    • JPH04194559A
    • 1992-07-14
    • JP32255990
    • 1990-11-28
    • TOSHIBA CORPTOSHIBA AVE KK
    • SAITO KAZUOKUMAZAWA KATSUYOSHIARAI YASUHIROSAITO TOSHIHIKOSANO TETSUOKAMEYAMA SHINICHI
    • F25B13/00
    • PURPOSE:To obtain a variable capacity with a wide range by sufficiently covering a low heating capacity, by a method wherein when heating operation requires a with heating capacity, a first opening or closing valve is opened, a second opening or closing valve is closed, and the operation of a refrigerant heating and the operation of a heat pump are simultaneously performed; and on the other hand, when the heating operation is enough even with a low heating capacity, the first and second valves are closed and only the operation of the heat pump is performed. CONSTITUTION:When heating operation requires a large amount of heating-capacity, the operation of heating a refrigerant and the operation of a heat pump are simultaneously performed. In this case, a two-way valve 63 on the upstream side of a refrigerant heater 53 is opened and a two-way valve 73 on the upstream side of a two-cylinder type compressor 27 is closed. The refrigerant flows parallel to the side of the refrigerant heater 53 under high pressure and to the side of an outdoor heat-exchanger 57 under low pressure, and absorbs heat by combustion and heat from the air. In the case where the heating operation is enough even if the heating capacity is small, the operation of the refrigerant heater 53 is stopped, the two way valve 63 is closed, and only the operation of the heat pump using the outdoor heat-exchanger 57 is performed. At this time, the two-way valve 73 is in the state of closing in that state, and the refrigerant coming out of the outdoor heat-exchanger 57 does not flow to the side of a pipe line 65, and flows only to the side of a pipe line 71, and thus flows into only one line of a first cylinder 39. Therefore, the heating operation can be covered even an extremely small heating-capacity.