公开(公告)号：JPH0331619A

公开(公告)日：1991-02-12

申请号：JP16596689

申请日：1989-06-28

Applicant: MATSUSHITA REFRIGERATION

Inventor： KITAYAMA HIROSHI ,  NODA TOSHINORI ,  NAKAGAWA NOBUHIRO ,  MORITA MITSURU

IPC: F24F1/00 ,  F24F13/02 ,  F24F13/068

Abstract: PURPOSE:To make the indoor temperature distribution ideal with more warmth around the lower part of the body than the upper part by providing a means for switching the outlet for air between an upper outlet as a passage to a room and a lower outlet as a passage to the void in a double floor according to the heat or cooling and by providing a plurality of openings formed in the living region as passages by which the void formed through the double floor communicates with the room. CONSTITUTION:There are provided an indoor machine 21 installed close to the ceiling 18, an air duct 28 having a length from the lower part of the indoor machine and reaching the void 34 of a double floor 33, an upper outlet 29 as a passage to the room on the front of the indoor machine, a lower outlet 32 as a passage from the air duct and open to the void of the double floor, a means-for-switching-the-outlet 25 for switching the ejection of air between the upper outlet and the lower outlet according to the operation made of heating or cooling, and a plurality of openings 35 formed in the living space 20 and through the double floor as passages by which the void communicates with the room. With this constitution in heating, warm air is ejected into the room from the openings 35 in the double floor at velocities of light currents, whereas, in cooing, cool air is ejected from the upper outlet located close to the ceiling in the indoor machine, sent flowing along ceiling, and sucked through the openings provided in the double floor. Thus, a ideal warm environment giving more warmth to the lower part of the body than the upper part can be produced.

公开(公告)号：JPH02251026A

公开(公告)日：1990-10-08

申请号：JP7091289

申请日：1989-03-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： KITAYAMA HIROSHI ,  NODA TOSHINORI ,  NAKAGAWA NOBUHIRO

IPC: F24F1/00

Abstract: PURPOSE:To enable reduction of an indoor temperature difference by a method wherein flow passage resistance of an opening port formed in a double floor is gradually reduced with the increase of a distance between the opening part and the lower discharge port of an indoor machine, and is increased with the decrease of the distance therebetween, and hot air is discharged through the hollow part of the double floor to the interior of a room. CONSTITUTION:During cooling operation, a fan 11 is run forward, and air cooled after the flow of it through a heat exchanger 10 is discharged upward through an upper discharge port 8. In this case, since the sizes of opening parts 17a, 17b...17x are set such that the size is increased toward a position in the vicinity of an end part spaced away from an indoor machine 1, cold air discharged through the upper discharge port 8 is difficult to be sucked since flow passage resistance of an opening part is increased with the decrease of a distance between the opening and the indoor machine 1, and the cold air is induced sufficiently to a position in the vicinity of the end part of a room 6 and a cold air arrival distance is increased, resulting in improvement of temperature distribution. During heating operation, the fan 11 is reversed and hot air is discharged through a lower discharge port 9. In this case, since flow passage resistance of the opening is increased with the decrease of a distance between the lower discharge port 9 and the opening part, an amount of hot air discharged in a room is reduced, an enough amount of hot air flows to the end part of a hollow part 15, and hot air is discharged in a room mainly through the end part of the room 6.

公开(公告)号：JPH02208424A

公开(公告)日：1990-08-20

申请号：JP2503489

申请日：1989-02-03

Applicant: MATSUSHITA REFRIGERATION

Inventor： NODA TOSHINORI ,  KITAYAMA HIROSHI ,  NAKAGAWA NOBUHIRO ,  MORITA MITSURU

IPC: F24F1/00 ,  F24F13/02 ,  F24F13/068

Abstract: PURPOSE:To make an ideal comfortable air conditioned spacing with a cold head and warm feet state by a method wherein an indoor unit is provided with an upper blowing port and a lower blowing port, the lower blowing port is connected to a hollow part of a double floor and an opening is provided near an end part of the double floor. CONSTITUTION:When a cooling operation is carried out, air passed through a heat exchanger 4 as indicated by a dotted arrow line and cooled is blown from an upper blowing port 16 upwardly, strikes against a ceiling, and descends under its own weight while expanding downardly. After cooling a dwelling area, the air is sucked through an opening 23, passes through a hollow part 22 of a double floor 21 and then the air is sucked through a lower blowing port 17. In turn, in case of heating operation, as indicated by a solid line, the warm air is blown from a blower blowing port 17, passes through the hollow part 22 of the double floor 21 and the air is blown from an opening 23. At this time, since the hot air passes while heating the double floor 21 from below it, a temperature of the double floor 21 is increased and a room 2 is indirectly heated under a natural convection flow. The hot air blown from the opening 23 is sucked from the upper blowing port 16 while heating the room 2.

公开(公告)号：JPH01302055A

公开(公告)日：1989-12-06

申请号：JP13186488

申请日：1988-05-30

Applicant: MATSUSHITA REFRIGERATION

Inventor： NODA TOSHINORI ,  NAKAGAWA NOBUHIRO

IPC: F24F11/02

Abstract: PURPOSE:To let an air blow-off at a blow-off angle substantially horizontal to a ceiling surface when the operation of an air conditioner approaches stationary state operation, and blow-off downward on slant, by computing an indoor thermal load and detecting an unbalanced temperature based on a radiation temperature of a floor or the like and a suction air temperature within a living space. CONSTITUTION:The surface temperatures of a floor surface and a desk are detected by an air suction detection means 19, an indoor thermal load computing means 22, and a radiation temperature means 20 around the floor surface. When the detected thermal load and the unbalanced temperature are all lower than the preset values, blow-off angle change over means control the blow-off angle so that the air may blow off downward on a slant. The air-conditioned air is adapted to be fed constantly into a living space in the early stage of operation commencement so that the air may reach a required temperature promptly. When the air approaches the preset temperature and blow-off air temperature change rate is minimized, a horizontal air blow-off flow is adapted to be generated in a non living space. Therefore, an occupant is immune to a direct contact of air blow-off flow so that the people may not feel discomfort and the indoor temperature distribution may be improved sharply as well.

公开(公告)号：JPH01150778A

公开(公告)日：1989-06-13

申请号：JP30994487

申请日：1987-12-08

Applicant: MATSUSHITA REFRIGERATION

Inventor： NAKAGAWA NOBUHIRO

IPC: F25D17/08

Abstract: PURPOSE:To eliminate a blower and to form an air curtain which is not dispersed, by a method wherein a coil around which a superconductive material is wound is situated around the inner side of the opening of a show case, and a positive and a negative electrode are situated to one side of the opening and its corresponding side respectively. CONSTITUTION:A coil 12 formed by a superconductive material is situated in an opening 2 of a show case body 1, and electrodes 13a and 13b are mounted to the one side of the opening 2 and its corresponding side. When a positive voltage is applied on the electrode 13a and a negative voltage is applied on the electrode 13b, air between the electrodes 13a and 13b is ionized, and a current flows from the electrode 13a to 13b. By a Lorentz's force between a magnetic flux and a current therebetween, air flowing from a position above the opening 2 to below is generated to form an air curtain. After the air curtain is sucked through a suction port 11 and heat-exchanged and cooled by means of a cooler 7, it is discharged through a discharge port 9 by means of a cold air passage 4.

公开(公告)号：JP2000179969A

公开(公告)日：2000-06-30

申请号：JP35564798

申请日：1998-12-15

Applicant: MATSUSHITA REFRIGERATION

Inventor： TAKATANI TAKAYUKI ,  NAKAGAWA NOBUHIRO

IPC: F25B13/00

Abstract: PROBLEM TO BE SOLVED: To inexpensively suppress the abrupt fall of the temperature of an outdoor heat exchanger, avoid unnecessary defrost control and continue an operation in a stable cycle when the operating capacity of an indoor machine increases upon heating operation in a multi-chamber type air conditioner. SOLUTION: A multi-chamber type air conditioner comprises an opening degree calculating means 23 for calculating the opening degree of an outdoor side expansion valve 11 on the basis of the value of outlet superheat degree detected by an outlet superheat degree detecting means 20 and a first correction opening degree determining means 24 for correcting the opening degree of the outdoor side expansion valve 11 by a predetermined opening degree when the change of operating capacity detected by an operating capacity change detecting means 21 is positive. The opening degree of the outdoor side expansion valve 11 is determined and controlled on the basis of a result culculated by the opening degree calculating means 23 and a result determined by the first correction opening degree determining means 24, so that an unnecesssary defrost control can be avoided and a safe operation can be constantly kept in a stable cycle.

公开(公告)号：JP2000018739A

公开(公告)日：2000-01-18

申请号：JP18013998

申请日：1998-06-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： MARUMOTO KAZUHIKO ,  NAKAGAWA NOBUHIRO ,  KURAMOTO TETSUEI

IPC: F25B1/00

Abstract: PROBLEM TO BE SOLVED: To prevent wet vapor suction to a compressor when a liquid refrigerant and a refrigerator oil are separated into two layers in an accumulator. SOLUTION: A point between a compressor 1 and a four-way valve 2 is connected to the bottom part of an accumulator 3 by a high-voltage bypass circuit 15 with a solenoid valve 13 ands restrictor device 14. Then, when separation into two layers, namely the liquid refrigerant and refrigeration machine oil in a storage room 8 is detected by a double-layer separation control detection means 17 according to a temperature that is detected by a thermistor 16, the solenoid valve 13 is opened by a valve opening/closing means 18 and a discharge gas is supplied to the storage room 8, and agitation is made by the discharge gas for forming a mixed liquid and for returning it to the compressor 1. Then, a double-layer separation control completion means 19 detects that double-layer separation is eliminated according to a temperature that the thermistor 16 detects, the valve opening/closing means 18 closes the solenoid valve 13.

公开(公告)号：JPH11201565A

公开(公告)日：1999-07-30

申请号：JP455198

申请日：1998-01-13

Applicant: MATSUSHITA REFRIGERATION

Inventor： KURAMOTO TETSUEI ,  NAKAGAWA NOBUHIRO ,  MARUMOTO KAZUHIKO

IPC: F25B1/00

Abstract: PROBLEM TO BE SOLVED: To prevent the drop of flow rate in an oil return capillary, or its clogging, concerning an air conditioner. SOLUTION: This air conditioner is one in which an oil separator 2 and the suction pipe of a compressor 1 are connected with each other through an oil return capillary 7, and which is equipped with an electric heater 8 for heating the outlet part or the whole of the oil return capillary part 7. Hereby, the flow rate drop or clogging of the oil return capillary 7 can be prevented, by suppressing the deposition and accumulation of the impurities at the outlet part of the oil return capillary 7, thus the reliability on the system improves.

公开(公告)号：JPH1114200A

公开(公告)日：1999-01-22

申请号：JP16398397

申请日：1997-06-20

Applicant: MATSUSHITA REFRIGERATION

Inventor： NAKAGAWA NOBUHIRO ,  MARUMOTO KAZUHIKO ,  KURAMOTO TETSUEI

IPC: F25B43/02

Abstract: PROBLEM TO BE SOLVED: To return oil to a compressor and prevent liquid from returning to the compressor regardless of the quantity of liquid refrigerant in an accumulator. SOLUTION: An accumulator comprises a storage chamber 5 for storing a refrigerant, an inlet pipe 6 inserted into the upper part of the storage chamber 5, an outlet pipe 7 inserted from the upper part of the storage chamber 5, passing a part near the bottom part of the storage chamber 5 and opened to the upper part of the storage chamber 5, an oil return hole 9 provided in the outlet pipe 7 located in the vicinity of the bottom part of the storage chamber 5, an oil level detecting means 10 for detecting the oil level of refrigerating machine oil stored in the storage chamber 5, a connecting means 11 for connecting the oil level detecting means 10 to the outlet pipe 7 located in the vicinity of the bottom part of the storage chamber 5 and an auxiliary oil retain hole 12 provided in the connecting means 11 located near the oil level detecting means 10. Thus, even when liquid refrigerant is stored in the storage chamber 5, the quantity of return oil to a compressor can be maintained and liquid can be prevented from returning to the compressor.

公开(公告)号：JPH09324959A

公开(公告)日：1997-12-16

申请号：JP14408096

申请日：1996-06-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： NAKAGAWA NOBUHIRO ,  KITAYAMA HIROSHI ,  KAMEI MASAHARU

IPC: F25B1/00 ,  F25B13/00

Abstract: PROBLEM TO BE SOLVED: To prevent a heating capacity from being lowered when condensation pressure is controlled to a prescribed value in a heating operation when a non- azeotrope refrigerant is used in a multi-chamber heating and cooling appliance. SOLUTION: A multi-chamber heating and cooling appliance comprises a first flow rate valve 14, a receiver tank 15, a bypass circuit 17 to which a second flow rate valve 16 is connected, an inlet pressure and temperature detecting means 21 for detecting inlet pressure and temperature, an inlet superheat degree computing means 22 for computing the degree of inlet superheat based on the detected results, a flow rate valve opening degree computing means 23 for computing the opening degrees of the first flow rate valve 14 and the second flow rate valve 16 based on the computed result, and a flow rate valve driving means 24 for driving the first flow rate valve 14 and the second flow rate valve 16 based on the opening degree. Thus, in a heating operation when a non azeotrope refrigerant is used, a heating capacity is not lowered and a desired capacity can be maintained even when condensation pressure is controlled to a prescribed value. Further, the degree of inlet superheat can be finely controlled and a cycle stability can be improved.