Daikin Industries, Ltd.

Shigeki Kamitani

Fumiaki Koike

Masahiro Honda

Kazuto Yamagata

Hirotaka Doi

Mikio Kagawa

Daiki Hirawa

Akihiro Eguchi

Taichi Koshiji

Takuya Horita

Yuusuke Tanaka

Miho Kurokawa

Yuusuke Nakagawa

Yusuke Nakagawa

Tadashi Sao

Hiroshi Fuchikami

Tomohisa Takeuchi

Shougo Ohta

Katsutoshi Sakurai

Takashi Tsujiuchi

Daiki Kurita

Provided is an outdoor unit for a refrigeration apparatus, the outdoor unit being capable of suppressing decrease in reliability. An outdoor unit () includes: a compressor (); an outdoor fan () configured to provide outdoor air flows (AF), the outdoor fan () being higher in heightwise position than the compressor (); a high-heat generating electric component () configured to control the compressor (); a fan controlling electric component () configured to control the outdoor fan (); a board unit () including a compressor controlling electric component mount portion () and a fan controlling electric component mount portion (); a first cooling unit (); and an outdoor unit casing (). The outdoor air flows (AF) flow from below upward in the outdoor unit casing (), and flow out of the outdoor unit casing () through a blow-out port (). The first cooling unit () includes a plurality of first cooling unit fins () located on flow paths of the outdoor air flows (AF), the first cooling unit fins () being adjacent to the compressor controlling electric component mount portion (). The high-heat generating electric component () is lower in heightwise position than the outdoor fan () and higher in heightwise position than the fan controlling electric component ().

Outdoor unit for refrigeration apparatus

An outdoor unit of a refrigeration apparatus includes: a fan that generates an upward flow of air passing through a heat exchanger; an electric component box that accommodates a group of electric components; and a casing that includes a panel disposed at a predetermined position opposite to the electric component box. The panel is divided into at least a first panel and a second panel in a lateral direction as viewed from a front view of the panel. The first panel is opposed to at least part of the electric component box. The first panel is detachable from the casing while the second panel remains attached to the casing.

Outdoor unit of refrigeration apparatus

An outdoor unit for a refrigeration apparatus includes: a casing that houses a plurality of devices including a first device and a second device; a plurality of electric components including a first electric component and a second electric component; an electric component box disposed in the casing and that houses the plurality of electric components; a first wire that carries a first voltage or current between the first electric component and the first device; a second wire that carries a second voltage or current between the second electric component and the second device; and a cover part that suppresses entry of liquid into the electric component box. The second voltage or current is lower than the first voltage or current.

An air conditioner includes a liquid pressure adjusting expansion valve that is located in an outdoor liquid refrigerant pipe at a part thereof closer to a liquid refrigerant communication pipe than to a refrigerant cooler and configured to reduce a pressure of a refrigerant so that a refrigerant flows through the liquid refrigerant communication pipe in a gas-liquid two-phase state and so that the refrigerant flows through an outlet of a refrigerant cooler in a liquid state.

Air conditioner

A heat source unit including: mounting feet; a bottom frame disposed on the mounting feet; vibration-proofing members that are disposed between the bottom frame and the mounting feet and space the bottom frame apart from the mounting feet; and a plurality of struts that extend upward from the mounting feet. All of the struts are anchored to the mounting feet without being anchored to the bottom frame.

Heat source unit

An outdoor unit for an air conditioner includes: a casing including a bottom plate that defines a bottom surface of the casing; a heat exchanger disposed in the casing; and an installation foot that supports the bottom plate from below. The installation foot includes: a support portion that supports from below an end portion of the bottom plate, a wall portion disposed on an outer side of the end portion of the bottom plate and that extends upward from the support portion, and a mount portion that extends from an upper end of the wall portion. The heat exchanger is mounted on the mount portion. The mount portion has a hole that extends through the mount portion in a height direction of the outdoor unit.

Outdoor unit for air conditioner

A heat source unit includes: a corrugated plate-like bottom frame in which ridges and furrows extend across the front and rear direction or across the right and left direction; and mounting feet. The mounting feet include: supports that support, from below, the furrows of supported ends of the bottom frame on sides that the ridges and the furrows can be seen; and walls disposed on outer sides of the supported ends and that extend upward from the supports. Water drainage passages, that drain water sticking to tops of the ridges of the supported ends to the supports, are disposed above the supports.

Heat source unit with corrugated bottom plate

A heat source unit constitutes part of a basic refrigerant circuit including: a compressor that compresses refrigerant; an accumulator that temporarily accumulates the refrigerant before the refrigerant is sucked into the compressor; an oil separator that separates refrigerating machine oil from the refrigerant after the refrigerant has been discharged from the compressor; a heat source-side heat exchanger that functions as a radiator or an evaporator of the refrigerant; a liquid refrigerant communication pipe; utilization-side expansion valves; utilization-side heat exchangers; and a gas refrigerant communication pipe that are connected to one another, the heat source unit comprising refrigerant circuit constituent parts including the compressor, the accumulator, the oil separator, and the heat source-side heat exchanger that are provided inside a casing, and the refrigerant circuit constituent parts being changed or added in accordance with capacity or function.

A heat source unit includes a compressor and an electrical component box both disposed inside a casing, where a bottom frame forming a bottom surface of the casing includes a first bottom frame on which the compressor is disposed and a second bottom frame that is adjacent to the first bottom frame. At least half of the electrical component box is placed above the second bottom frame.

As a shut-off valve inspection process for checking operation of a liquid side shut-off valve and a gas side shut-off valve, an air conditioning system operates a compressor in a cooling cycle state, performs opening and closing operation of the liquid side shut-off valve and the gas side shut-off valve, and determines whether the liquid side shut-off valve and the gas side shut-off valve properly operate on the basis of a temperature value detected by a temperature sensor provided in an indoor unit.

Air conditioning system

A bottom frame () which constitutes a bottom surface of a casing () is divided into a main bottom frame () where a first compressor () is to be provided and a sub bottom frame () where a second compressor () is to be provided. The main bottom frame () is further divided into a first bottom frame () and a second bottom frame (). The first compressor () is to be provided on the first bottom frame (). A refrigerant circuit component () to be replaced or added in accordance with a capability or a function is to be provided on the second bottom frame ().

An outdoor unit for a refrigeration cycle apparatus includes: a fan; a bellmouth that covers a periphery of the fan; a casing that internally houses the fan and the bellmouth so that airflow faces upward and that has a top end edge having a flat shape; and a diffuser surface disposed below a top end edge of the casing but above a top end of the bellmouth and on the outer side relative to the top end of the bellmouth in plan view, wherein the diffuser surface is inclined to extend outward away from the rotation axis of the fan as getting upward. The casing has a plurality of side surfaces that cover the sides of the bellmouth. At least one of the side surfaces has a recessed shape toward the bellmouth so that a gap with the top end edge of the bellmouth is reduced.

Diffuser and bellmouth for an outdoor unit fan casing

An indoor fan, an indoor heat exchanger, and refrigerant piping are housed in a casing having an air inlet and air outlets. An air conditioning indoor unit includes a first temperature sensor that measures a temperature of air in an air conditioning target space, a second temperature sensor that measures a temperature of the refrigerant piping, and a determining component that determines if there is refrigerant leakage while operation is stopped. The determining component performs a refrigerant leakage determination that is a determination whether there is refrigerant leakage based on a difference between the temperatures detected by the first temperature sensor and the second temperature sensor.

Air conditioning indoor unit with refrigerant leak detection

An air-conditioning apparatus includes at least one indoor unit with intake and blow-out ports, a refrigerant gas sensor disposed in an air flow path inside the indoor unit; and a control device. The indoor unit has an indoor fan drawing indoor air in from the intake port and blowing conditioned air out from the blow-out port, an indoor temperature sensor detecting temperature of the indoor air, an indoor-side refrigerant circuit circulating a refrigerant having a greater specific gravity when gasified than air and producing conditioned air from the indoor air, and at least one refrigerant temperature sensor detecting refrigerant temperature in the refrigerant circuit. The control device drives the indoor fan in accordance with at least one of an operation mode and a detection value of the at least one refrigerant temperature sensor, and detects refrigerant leakage using the refrigerant gas sensor.

Air-conditioning apparatus with a refrigerant leak sensor in an indoor unit

An outdoor unit of an air conditioning device includes an outdoor unit main body having a square planar shape, a heat exchanger provided along a side surface of this outdoor unit main body, and a fan provided in an upper part of the outdoor unit main body, the fan for blowing out air in the outdoor unit main body upward. An opening portion capable of providing communication between an interior and an exterior of the outdoor unit main body is formed between a one side end portion and an other side end portion of the heat exchanger adjacent to each other, and in at least one of the side end portions positioned in a peripheral edge of the opening portion, a cover member for covering a heat transfer tube protruding from the side end portion is provided.

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Osaka, Japan

Shigeki Kamitani