Denso Corporation

Nippondenso Co., Ltd.

Other

Hideaki Sato

Tomohiko Nakamura

Shin Honda

Hisao Nagashima

Katsuya Ishii

Thuya Aung

Nobuharu Kakehashi

Yoshiyuki Okamoto

Seiji Inoue

Takahisa Suzuki

Masaaki Tanaka

Shigeo Numazawa

Keiichi Kitamura

Tadayoshi Terao

Satoshi Inoue

Kazuhisa Yano

Atsushi Kosaka

Yoshiaki Fukushima

Kenichi Fujiwara

Hiroshi Tanaka

Takuya Fuse

Satoshi Ito

Hiroshi Mieda

Yasukazu Aikawa

Aun Ota

Tadashi Nakamura

Shinya Kasamatsu

Kouji Inagaki

Yasushi Kouno

Mitsumasa Horii

Yoshiki Chujo

Koji Inagaki

Junichiro Kanamori

Norihiko Setoyama

Yoshiaki Fukuyama

Masaru Urushihara

Yuri Sasaki

Toshio Utsumi

Kazutoshi Yamamoto

During a normal operation, a refrigeration cycle device is switched to a refrigerant circuit in which heat contained in a high-pressure refrigerant flowing out of an interior radiator is stored in a heat storage member. When frost is formed on an evaporator, the refrigeration cycle device is switched to another refrigerant circuit in which the exterior heat exchanger is heated and defrosted using heat stored in the heat storage member as a heat source. The heat storage member uses a material formed by adding W (tungsten) as an additive to VO(vanadium dioxide) which is a transition metal oxide having a property of a phase transition between a metal and an insulator. The heat storage member effectively stores or dissipates heat depending on a temperature zone of the refrigerant, thereby suppressing an increase in energy consumption of a compressor.

Refrigeration cycle device

A refrigerating cycle unit includes an ejector and a heat exchanger defined by layering a plurality of plates. Each of the plates has a refrigerant passage, and the refrigerant passages are connected by a header tank in a layering direction of the plates. At least two of the plates are fix plates having a fix portion to fix the ejector, and a communication portion through which the ejector and the header tank communicate with each other. The ejector is arranged between the fix portions of the fix plates in the layering direction, so as to be integrated with the heat exchanger.

Ejector type refrigerating cycle unit

A heat exchanger includes a heat exchanging section for performing heat exchange between a refrigerant and a cooling medium and a passage section. The passage section includes a first passage and a second passage for supplying the refrigerant to the heat exchanging section and a supply passage for supplying the refrigerant to the first passage and the second passage. The first passage and the second passage define a first opening portion and a second opening portion opening at an end of the supply passage. A minimum distance between an opening edge of the first opening portion and an inner surface of the supply passage is equal to a minimum distance between an opening edge of the second opening portion and the inner surface of the supply passage.

Heat exchanger

An evaporator unit includes an evaporator configured to evaporate a refrigerant, and a capillary tube configured to decompress the refrigerant. The capillary tube has two longitudinal ends bonded to the evaporator. At least one position of a middle portion between the two longitudinal ends of the capillary tube is fixed to the evaporator by press-contacting the evaporator. Therefore, it can prevent a crack from being caused at the bonding portions of the two longitudinal ends of the capillary tube.

Evaporator unit

An evaporator unit includes a first heat exchanger configured to perform heat exchange between refrigerant flowing thereinto from a refrigerant inlet and air, a bypass passage through which the refrigerant flowing from the refrigerant inlet flows while bypassing the first heat exchanger, a second heat exchanger configured to perform heat exchange between air and mixed refrigerant in which the refrigerant after passing through the first heat exchanger and the refrigerant having passed through the bypass passage are mixed, and a flow amount adjustment portion configured to adjust a flow amount of the refrigerant flowing through the first heat exchanger and a flow amount of the refrigerant flowing through the bypass passage. Accordingly, the first heat exchanger and the second heat exchanger can be configured to have respectively portions in which a dryness of the refrigerant is in a range between 0.6 and 0.9.

In a heat storage system for a vehicle, when a temperature of cooling water from a vehicle engine is high, adsorbents are heated by the cooling water, so that moisture is desorbed from the adsorbents in order to store heat. When the temperature of cooling water is low, the moisture is adsorbed in the adsorbents to heat the cooling water, while refrigerant in a vapor compression refrigerator is cooled by evaporating water. Thus, adsorption heat is generated from the adsorbents, and the cooling water is heated by using the adsorption heat. Accordingly, warm-up operation of the vehicle engine is facilitated, while motive power consumed by the vapor compression refrigerator can be reduced.

Heat storage system for vehicle, with adsorbent

In an adsorption-type refrigerating apparatus, an adsorber includes therein an adsorbent having a temperature-dependent characteristic in which an amount adsorbed in an adsorption step is larger than an amount adsorbed in a desorption step, even when a vapor pressure rate in the adsorption step is equal to or lower than a vapor pressure rate in the desorption step. Therefore, even when the cooling temperature of outside air for cooling the adsorbent increases, a sufficient cooling capacity can be obtained. In addition, a difference between the amount adsorbed in the adsorption step and the amount adsorbed in the desorption step can be made larger.

Adsorption-type refrigerating apparatus

Heat is absorbed from a first heat emitter and a second heat emitter is cooled by an adsorption type refrigerator operating by that absorbed heat. When the amount of emission of heat of the first heat emitter exceeds a predetermined amount of heat, the heat absorbed in the heat medium by a first heat collector is discharged to the outside air by an outdoor unit without being supplied to the adsorbent of the refrigerator. On the other hand, when the amount of emission of heat of the first heat emitter falls below a predetermined amount, the heat medium which had been supplied to a first heat exchanger for heating the adsorbent is switched to return to the first heat collector without flowing to the outdoor unit.

Cooling system of heat emitters

An adsorbent which desorbs water by being heated and adsorbs water by being chilled, comprising a porous body having a pore volume of not less than 0.2 cm /g and a pore size from 0.6-1.6 nm. This adsorbent is good for an adsorptive-type refrigeration apparatus, used in an automotive air conditioner, which has an adsorbing core.

Process for making an adsorbent

Porous materials having a metal oxide skeleton are taught that have various water vapor adsorption capacities defined by the amount of adsorbed water vapor at a specific relative vapor pressure in a water vapor adsorption isotherm. A preferred porous material has a water vapor adsorption capacity that is less than or equal to 0.1 g/g at a relative vapor pressure of 10%, and greater than or equal to 0.2 g/g at a relative vapor pressure of 28%. Methods of making such porous materials are also taught. A preferred method for forming a porous material includes condensing a skeleton starting material for the porous material, in the presence of a surfactant, in a solution which has a concentration of the skeleton starting material in the solution that is less than or equal to 0.4 mol/L and a molar ratio of the surfactant to the skeleton starting material that is greater than or equal to 0.05 and less than or equal to 50, to form a condensate and removing the surfactant from the condensate.

Porous materials and methods for forming the same

The present invention provides an adsorption-type cooling apparatus comprising first, second, third, and fourth adsorption devices filled with a coolant and contain adsorbents which adsorb evaporated coolant and desorb the adsorbed coolant during heating. Adsorption cores provide heat exchange between the adsorbents and a heat medium, and evaporation and condensation cores provide heat exchange between heating medium and the coolant. A cooling device in which heating medium cooled in the evaporation and condensation cores circulates and cools the object of cooling. A heating means supplies a high-temperature heat medium to the first-fourth adsorption devices. A cooling means supplies a low-temperature heat medium which has a temperature lower than that of the high-temperature heat medium to the first-fourth adsorption devices. Also, a switching control means is provided which switches between multiple states.

Adsorption-type cooling apparatus

An (n)th adsorber and (n+1)th adsorber among a plurality of adsorbers in an adsorption process are connected thermally in series, and adsorbent of the (n)th adsorber which is a previous stage is cooled by adsorption of refrigerant by adsorbent of the (n+1)th adsorber which is a subsequent stage. That is to say, adsorbent of a first-stage adsorber on the left-hand side which adsorbs vapor of refrigerant such as water which exits from an evaporator is strongly cooled by adsorption of vapor from refrigerant such as water which flows through a cooling pipe by adsorbent of a second-stage adsorber on the right-hand side, large adsorption capacity is imparted by a reduction in temperature, and as a result, the evaporator demonstrates large refrigeration capacity. Consequently, a compact adsorptive type refrigeration apparatus which demonstrates large refrigeration capacity while having a compact adsorber and using a comparatively small quantity of adsorbent is provided. The present invention can also be applied with respect to an adsorption process of a refrigeration system in which adsorbent circulates in an adsorber.

Adsorptive type refrigeration apparatus

A cooling medium charge amount detector capable of detecting whether or not an actual amount of a cooling medium is a desired amount in comparison with the amount of the cooling medium necessary for a desired degree of supercooling on an inlet side of an expansion valve in a refrigeration circulation system, without using a sensor or computation means. A cooling medium on the inlet side of an expansion valve 23 in a refrigeration circulation system 20 is allowed to flow into a cooling medium charge amount detector 40. Throttles 41, 42, 43 are disposed in this cooling medium charge amount detector 40, and sight glasses 44, 45, 46 are disposed at both ends of the throttles 41, 42, 43 to detect a gas-liquid condition of the cooling medium. When the cooling medium flows into this cooling medium charge amount detector, the shift of the cooling medium from a liquid condition to a two-phase gas-liquid condition is checked upstream or downstream of any throttle to match the load condition at that time. In this way, a pressure difference proportional to the degree of supercooling can be detected and eventually, whether or not the charge amount of the cooling medium is suitable in the refrigeration circulation system 20 can be detected.

Method and apparatus for detecting an amount of cooling medium charged

A refrigerant recovery system has a refrigerant recovery vessel which is connected to a refrigerant-recovered refrigeration circuit. A gaseous refrigerant in the refrigerant-recovered refrigeration system is sucked into the refrigerant recovery vessel due to the difference between the pressure in the refrigerant-recovered refrigeration circuit and the refrigerant recovery wheel. The refrigerant recovery vessel is cooled by a refrigeration circuit provided in the refrigerant recovery system, so that the sucked gaseous refrigerant is a liquified. to the refrigerant recovery vessel, a recovery tank made of a cartridge type is connected. The liquefied refrigerant from the refrigerant recovery vessel is sent to the tank. When the temperature of the recovery tank is not low enough, the liquefied refrigerant sent into the tank is evaporated and then returns to the refrigerant recovery vessel so that the refrigerant is liquefied in the vessel again. Such processes are repeated so that the temperature of the tank is gradually lowered by the liquified refrigerant sent thereto and hence the liquefied refrigerant is accumulated in the tank.

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Anjo, Japan

Hideaki Sato