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公开(公告)号：JPH10253178A
公开(公告)日：1998-09-25
申请号：JP5583797
申请日：1997-03-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： KINO AKIHIRO , MASATOKI YOSHIBUMI , FUJIMOTO RYUZO , INOUE TAKAHIRO , TOMARU KENJIRO
Abstract: PROBLEM TO BE SOLVED: To prevent liquid compression from occurring by suction of liquid refrigerant by discharging stagnating refrigerant from a discharge port provided about the bottom of a compressor by using a refrigerating machine oil, and evaporating the liquid refrigerant in a evaporation pipe to flaw it out into a suction pipe. SOLUTION: During interruption of a compressor 10 refrigerating machine oil 7 and a liquid refrigerant, both being mutually not soluble, are separated into two layers where the refrigerating machine oil 7 stagnates in a shell 11 as an upper layer with the liquid refrigerant as a lower layer owing to their specific gravities. In this state, when the operation of the compressor 10 is started and simultaneously a two-way valve 14 is opened, the liquid refrigerant is sucked through a discharge hole 12 communicated with a suction pipe 10a, and is sucked into the compressor 10 through a discharge pipe 13, the two way valve 14, a flow rate limit valve 15, an evaporation pipe 16, and the suction pipe 10a. At this time, the liquid refrigerant is limited in its flow rate by the flow rate limit pipe 15 after passage through the two way valve 14 and is reduced in its pressure, and is further evaporated in the evaporation pipe 16 whereby when it reaches the suction pipe 10a, it becomes refrigerant vapor so that liquid is prevented from being compressed in the compressor 10.
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公开(公告)号：JPH08305946A
公开(公告)日：1996-11-22
申请号：JP11287095
申请日：1995-05-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： MASATOKI YOSHIBUMI , FUJIMOTO RYUZO
Abstract: PURPOSE: To precisely obtain a specified cooling performance by reducing the throttling resistance of a capillary tube and preventing the pressure of the lower pressure side from dropping as the cold load quantity of an article storage chamber decreases, and controlling the air capacity of a fan outside the box and optimizing the pressure of the higher pressure side and condensing capability, and to reduce the power consumption by suppressing increases in compression ratio and operation rate. CONSTITUTION: A compressor 6, a condenser 8, and capillary tubes 10, solenoid valves 12, 16, and 24, and coolers 4 which are provided for >=3 respective article storage chambers 2, are connected together successively in a loop, a frequency converting device 28 which varies the rotational frequency of the fan motor 7 outside the box is provided, and connection pipes 25 and 26 which connect the capillary tubes 10 and are provided with one-way valves 27 are arranged between the capillary tubes 10 and solenoid valves, thus constituting the cooling device of the automatic vending machine.
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公开(公告)号：JPH07190598A
公开(公告)日：1995-07-28
申请号：JP32907593
申请日：1993-12-24
Applicant: MATSUSHITA REFRIGERATION
Inventor： MASATOKI YOSHIBUMI
IPC: F25D21/08
Abstract: PURPOSE:To provide a refrigerator in which non-azeotropic mixture refrigerant is used, a defrosting cooling part is arranged at a lower part of a cooling device so as to perform an easy defrosting operation and at the same time the defrosting cooling part and the upper part of the cooling device are directly connected by two heat pipes so as to promote defrosting at the upper part of the cooling device, prevent a poor defrosting operation, a heat exchanging capability of the cooling device is kept at its normal state and at the same time a defrosting time is shortened to restrict the temperature within the refrigerator from being increased and a consumption power is reduced. CONSTITUTION:This refrigerator is comprised of a cooling device in which cooling pipes 7 having non-aezotropic mixture refrigerant used and arranged in a plurality of stages in a vertical direction and arranged in a substantial grid pattern as well as a plurality of rows in an aft-and-fro direction, cooling fins 6 connected to the cooling pipes 7 in a heat exchanging manner and connector pipes for use in connecting the outlets of the cooling pipes at the upper several stages to inlets of the defrosting cooling pipes using the lower several stages and further connecting the outlets of the defrosting cooling pipes with the inlet of the cooling pipe at the central part, wherein a heater 2 is arranged below a cooling device 12.
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公开(公告)号：JPH0566071A
公开(公告)日：1993-03-19
申请号：JP22582191
申请日：1991-09-05
Applicant: MATSUSHITA REFRIGERATION
Inventor： MASATOKI YOSHIBUMI
Abstract: PURPOSE:To enable effecting rapid freezing by providing a bypass line and a rapid-freeze switch, the former connecting the liquid phase refrigerant in a gas-liquid separator to the outlet of a second condenser positioned at an upstream point to an evaporator and the latter used for opening and closing the bypass line. CONSTITUTION:For example, when rapid cooling of the freezing chamber is desired, by pressing a rapid-freeze switch 13 a bypass line 12 is opened; then even a liquid phase medium containing a high boiling point component in a large proportion, separated by a gas-liquid separator 9, is also injected into an evaporator 6 and flows therethrough in a confluence with a liquid phase refrigerant, produced by a second condenser 4, in which a low boiling point component predominates. Thus by increasing the refrigerant in circulation through the evaporator 6 rapid freezing can be effected in the freezing chamber. To end the rapid freezing, the rapid-freeze switch 13 is turned off to shut off the bypass line 12 so that the liquid phase refrigerant containing a high boiling point component in a large proportion, separated by a gas-liquid separator 9, is barred from entering the evaporator 6. This method enables effecting rapid freezing.
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公开(公告)号：JPH0452477A
公开(公告)日：1992-02-20
申请号：JP16212190
申请日：1990-06-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： FUJIMOTO SHINJI , MASATOKI YOSHIBUMI , SHIMIZU TAKESHI
IPC: F25D16/00
Abstract: PURPOSE:To obtain predetermined thermal insulating performance with less amount of a cold storage agent for a longer time by dividing a thermal insulation box body into a thermal insulation chamber and a cold storage chamber, providing an indoor blower with a battery as a power source to circulate chilled gas in the cold storage chamber to the cold storage chamber through the thermal insulation chamber, a flat platelike cold storage agent increased in thickness at the inlet side of an air flowing direction and decreased at the outlet side of the flowing direction, and a cooler for cooling to freeze it from both side surfaces. CONSTITUTION:An indoor blower 26 with a battery 27 as a power source to circulate chilled gas in a cold storage chamber 23 through a thermal insulation chamber 22 in a direction as indicated by arrows with solid lines is provided in a chilled gas discharge port 25. A freezer unit 32 is operated to freeze cold storage agents A30 and B31 through the cooled fins of first and second coolers 28, 29. In this case, the thickness of the agent A30 is increased, the thickness of the agent 31B is decreased to less than the thickness of agent A 30 so as to make a frozen part where the agent is not melted at the time of transporting and frozen part uniformalized, and the time until only the agent at the inlet side of the air flowing direction is completely melted to reduce the surface area of the frozen agent can be lengthened. Thus, thermal insulation time can be lengthened.
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Patent Agency Ranking
公开(公告)号：JPH03241275A
公开(公告)日：1991-10-28
申请号：JP3656690
申请日：1990-02-16
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAGAI JUNICHI , FUJIMOTO SHINJI , MASATOKI YOSHIBUMI
IPC: F25D16/00
Abstract: PURPOSE:To prevent degradation of quality of substances to be transported, by separating a cold accumulating room and an insulating room thermally and completely so that a cold accumulating agent can accumulate cold and the temperature within the insulating room can be maintained at a set value within a refrigerating temperature zone by controlling cool air volume to be sent into the insulating room. CONSTITUTION:An insulating partition wall 21 of heat insulating characteristic separates a cold accumulating room 15 and an insulating room 22 thermally. A discharge port 23 is arranged at one end of the wall 21 on the side of an insulating fan 16, and an insulating duct 25 is mounted on the wall 21 for introducing air in the insulating room 22 from the opposite end of the wall 21 into an inlet port 24. A freezer unit 26 and a battery 27 which works as a power source for the insulating fan 16 are mounted outside of an insulating container body 10. Accordingly, the temperature in the insulating room 22 never drops down under 0 deg.C due to heat transmission from the cold accumulating room 15. Thus a cold accumulating insulating container in which substances to be kept cool never freeze can be obtained.
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公开(公告)号：JPH0285671A
公开(公告)日：1990-03-27
申请号：JP23524888
申请日：1988-09-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： FUJIMOTO SHINJI , MASATOKI YOSHIBUMI
IPC: F25D16/00
Abstract: PURPOSE:To enable a refrigerator to be used both as a transportation apparatus and as a storage by providing an electromagnetic shutter at a cold air passage part through which a cold accumulating chamber and a cold storage chamber communicate with each other, closing the shutter when a blowing fan in the cold accumulating chamber is operated, and opening the shutter when the fan is stopped and at the time of cold storage transportation. CONSTITUTION:When a circuit of a cold accumulation temperature detector 42 is closed, an electromagnetic shutter 35 is closed so that cold air is released through a partial opening part 35a into a cold storage chamber 36, thereby preventing the cold air from being released excessively to the side of the chamber 36 by an operation of a blowing fan 30. When the circuit of the detector 42 is opened, the shutter 35 is opened so that the cold air can be fed sufficiently into the cold storage chamber 36 by a ventilating fan 37 even with the blowing fan 30 being stopped. When this system is used for cold storage transportation, the shutter 35 is opened, and the cold air in a cold accumulating chamber 27 is fed into the cold storage chamber 36 by the ventilating fan 37, thereby controlling the chamber 36 to a predetermined temperature.
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公开(公告)号：JPH01200169A
公开(公告)日：1989-08-11
申请号：JP2436188
申请日：1988-02-03
Applicant: MATSUSHITA REFRIGERATION
Inventor： FUJIMOTO SHINJI , MASATOKI YOSHIBUMI
Abstract: PURPOSE:To enable a reduction in temperature within a main body of a refrigerator to be performed even at a low temperature of the surrounding atmosphere by a method wherein a temperature controller for controlling a freezing temperature of a coolant and a fan for controlling a blowing of cold air into a refrigeration chamber are provided and a temperature of the coolant is controlled in reference to a temperature of the surrounding atmosphere. CONSTITUTION:A latent heat type coolant 28a with a high melting point is arranged at a cold air suction port 25 of a refrigerator chamber 22 and a low temperature latent heat coolant 28b with a low melting point is arranged at a cold air discharging port 24. A cooling unit 29 for freezing the coolants 28a and 28b may detect a temperature within a refrigerator chamber 23 and is controlled by a freezing temperature controller 39 for use in adjusting an amount of coolants 28a and 28b. With this arrangement, when the surrounding air temperature is low, only the coolant with a high melting point is completely freezed in response to an operation of the freezing temperature controller to cool the refrigeration chamber, so that it is possible to prevent a reduction in temperature in the refrigeration chamber more than a desired value and so it can be kept accurately at a specified temperature.
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公开(公告)号：JPH01150773A
公开(公告)日：1989-06-13
申请号：JP30995187
申请日：1987-12-08
Applicant: MATSUSHITA REFRIGERATION
Inventor： MASATOKI YOSHIBUMI
Abstract: PURPOSE: To freeze a regenerating agent and cool air inside a regenerative refrigerator with efficiency and enable the refrigerator to be periodically defrosted, by providing cooling pipes meandering on a central plane and on an inner surface of a cooling device at the side facing the inside of the refrigerator. CONSTITUTION: A cooling device 21 is attached on the lower side of ceiling of a refrigerator body 17, a part 24a of a cooling pipe 24 is arranged to meander on a plane at the center of the cooling device 21 or on a plane upper than that, and further another cooling pipe 24b is arranged to meander on the inner bottom surface 25 of the cooling device 21, the bottom facing the inside of the refrigerator body, and fixedly pressed thereto by fixing brackets. A refrigerant pass 29a is selected via a four-way type valve 29 and a compressor 27 is operated for regenerative cooling, so that the cooled cooling pipe 24 cools a regenerating agent 23 to completely solidify it. At that time, the cooled cooling pipe 24 also cools air inside the refrigerator body 17 to a given temperature. When a refrigerant path 29b is selected via the four-way type valve 29 and the compressor 27 is operated for a fixed time period, refrigerant gas flows to the cooling pipe 24b fixedly attached onto the bottom 25 of the cooling device 21 to melt all the frost formed by a regenerating agent 22.
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公开(公告)号：JPS62200018A
公开(公告)日：1987-09-03
申请号：JP3992386
申请日：1986-02-25
Applicant: MATSUSHITA REFRIGERATION
Inventor： MASATOKI YOSHIBUMI
Abstract: PURPOSE:To aim at improvement in bearing performance, by sintering a porous bronze alloy, impregnating graphite in a back metal of a bearing, and exposing this porous bronze alloy and the graphite both sparsely on a contact surface with a shaft. CONSTITUTION:A porous bronze alloy 17 is separated on a surface of a bearing, and graphite 19 or a solid lubricant is impregnated as much as 4-6% there. Therefore, even if lubrication becomes poor temporarily and comes to a state of exhaustive lubrication or boundary lubrication, seizure or binding is hard to happen owing to this graphite and, what is more, abrasion resistance is also sharply improved.
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