Kabushiki Kaisha Toshiba

Toshiba Consumer Marketing Corporation

Toshiba Ha Products Co., Ltd.

Minoru Temmyo

Masato Tago

Hidetake Hayashi

Takahiro Yoshioka

Koji Kashima

Takuya Kishimoto

Takao Kojima

A high-pressure side discharge port of a two-stage compressor (A) and a condenser (A) are connected, condenser (A) and a PMV (A) are connected, a refrigerating side exit of PMV (A) is connected to a medium pressure side suction port of two-stage compressor (A) via an R capillary tube (A) and an F evaporator (A), connected to an F evaporator (A) via an F capillary tube (A), F evaporator (A) is connected to a low-pressure side suction port of two stage compressor (A) via a low-pressure suction pipe (A), PMV (A) can switch a simultaneous cooling mode and a freezing mode, and in the simultaneous cooling mode, a refrigerant flow rate toward R evaporator (A) is adjusted by PMV (A), and thereby a temperature difference control is performed so as to make a difference between an entrance temperature and an exit temperature of R evaporator (A) equal to a preset temperature difference (for example, 4&#xb0; C.).

Refrigerator

The invention provides a refrigerator having a two-stage compression compressor capable of performing efficient cooling of a both a refrigerator compartment and a freezer compartment. A high-pressure delivery outlet of a two-stage compression compressoris connected to a condenser, the condenseris connected to a three-way valve, a first outlet of the three-way valveis connected via an R capillary tubeand an R evaporatorto an intermediate-pressure intake of the two-stage compression compressor, is connected and via an F capillary tubeto an F evaporator, the F evaporator is connected to a low-pressure intake of the two-stage compression compressorvia a low-pressure suction pipe, the three-way valvecan switch between a simultaneous cooling mode and a freezer mode, and when in the simultaneous cooling mode the interior temperature of the refrigerator compartmentfalls to a predetermined temperature it switches to the freezer mode.

A refrigerator has a cold storage and freezer zones with individual fans and evaporators, a switching valve that allows refrigerant to flow simultaneously through each zone or through only one of the zones and a control which when power is supplied causes simultaneous flow, starting the compressor and a condenser fan while driving the cold storage fan at a high speed and the freezing zone fan at a low speed until such time that a set point time has been exceeded or the temperature set points of the zones has been reached by cooling.

Refrigerator with a plurality of parallel refrigerant passages

A refrigerator with heat exchanger optimally configured to conserve electricity and improve a food storing capability at its best state. The refrigerator includes: a freezing room connected from an evaporator through a circulating passage, the freezing room having the circulating passage which circulates an air cooled by the evaporator; a storage room connected to the freezing room, in which a temperature of the storage room is set higher than that of the freezing room; a flow-in passage connected to the storage room where the air cooled by the evaporator flows into the storage room; a flow-out passage connected from the storage room where a chilled air flows out of the storage room; and a heat exchanger for exchanging heat between the cooled air flowing through the circulating passage and the chilled air flowing through the flow-out passage, so that the temperature inside the storage room is evenly and smoothly stable.

Refrigerator with heat exchanger optimally configured

A refrigerator having an air passage duct which contains therein a wire and tube condenser where a cooling air caused by a fan flows. A refrigerator includes: a machine compartment having a fan therein for causing a flow of cooling air, located at a bottom of the refrigerator; an air passasge duct, connected to the machine compartment, containing a wire and tube condenser (referred to as a wire condenser hereinafter), the air duct and the wire condenser being placed at the bottom of the refrigerator; and an exhaust port for discharging an air used for radiating a heat of the wire condenser, wherein the air passage duct is formed in a zigzag shape so that the cooling air flowing through the air passage duct crosses through the wire condenser.

Growing community of inventors

Osaka, Japan

Minoru Temmyo