Daikin Industries, Ltd.

Daikin Kogyo Co., Ltd.

Haruo Nakata

Hironori Iwanaga

Hiromune Matsuoka

Hyunyoung Kim

Takashi Shimamura

Junichirou Tanaka

Makio Takeuchi

Masakazu Hirai

Kazushige Maeda

Masami Horiuchi

Hiromi Mikata

Toshiya Onishi

Susumu Oshima

Shun Yoshioka

Akira Hashimoto

Hirokazu Fujino

Kazuhide Mizutani

Yutaka Shibata

Tsunehisa Sanagi

Mitsuharu Numata

Kazushige Kasai

Toshimitsu Kamada

Kaori Yoshida

Isao Fujinami

Toshihiro Suzuki

Mamoru Asakawa

Yoshiki Murayama

Seiji Chazono

Syuuji Furui

Takayuki Hyoudou

Hou Gaku

Takanori Shimomachi

Hiroyuki Hirata

Tsukasa Nakaya

A bite-in type pipe connection structure is provided, the pipe connection structure being capable of, even if piping connection work is performed with a length of piping inserted insufficiently, minimizing deterioration of air-tightness at the joint portion, at which the piping is connected, due to an offset load acting on the piping. Also provided are a valve, a bite-in type pipe joint, and a refrigeration device using the bite-in type pipe connection structure. A ferrule is provided with: a low-strength portion which, when a coupling member becomes fastened to a joint body by manually rotating the coupling member, allows the distal end portion of the ferrule to deform so that the distal end portion restrains a length of piping which is to be connected; a level changing portion which connects a front tapered surface, which corresponds to the low-strength portion, and a rear tapered surface; and a rearward portion which is adjacent to the low-strength section. The level changing portion is formed so that the wall thickness of the rearward portion has a value which can airtightly retain the piping to be connected.

Bite-in type pipe connection structure

A heat exchanger includes a plurality of flat tubes and at least one wavily folded fin disposed between a pair of the flat tubes. The fin includes a heat transfer portion having a folded portion joined to a planar portion of each of the pair of flat tubes, and a cut-and-raised portion. The cut-and-raised portion is formed by raising a periphery of a cutting line segment when a material of the fin is wavily folded. The cutting line segment is set in a vicinity of a hypothetical center line of the folded portion before the material of the fin is wavily folded. The cutting line segment is formed by a combination of cutting line segments intersecting with the hypothetical center line, or a combination of a cutting line segment intersecting with the hypothetical center line and a cutting line segment displaced with respect to the hypothetical center line.

Heat exchanger

A heat pump type hot water supply device is provided with a heat source side heat pump unit having a heat radiating heat exchanger that condenses refrigerant to radiate heat from the refrigerant. The hot water supply device is provided with a water tank that stores water, a water supply pipe that supplies water to the water tank from the outside, a water circulation pipe that is extended in a bypassing manner and circulates the water in the water tank from a bottom section to an upper section, a heat absorbing heat exchanger that is arranged on the water circulation pipe and connected to the heat radiating heat exchanger of the heat source side heat pump unit so as to absorb heat, and a hot water supply unit that comprises a hot water supply pipe that supplies warm water in the upper section of the water tank to the outside.

Heat pump-type hot-water supply device

A duplex pipe fitting includes a fitting main bodyand a pair of coupling memberswhich are threaded to both ends of the fitting main body. The coupling membersare threaded to the fitting main body, so that two pipes P are connected to each other with the fitting main body. Each coupling memberincludes a holding portionincluding a holding surface consisting of a pair of or a plurality of pairs of planes facing each other so that it can be held with a general fastening tool. When a rotational torque for tightening the coupling memberto the fitting main bodyreaches a value indicating the completion of fastening, at least a part of the holding portion including the holding surface is separated and the pipe connecting is complete.

Duplex pipe fitting, exclusive tool for the duplex pipe fitting, refrigeration system employing the duplex pipe fitting, and separation type air conditioner

An indoor unit for a multi-directional air supply air conditioner capable of performing at least a heating operation includes: an indoor fan () for sucking air in an axial direction thereof and radially blowing out the air; and a heat exchange part (), connected in a refrigerant circuit () and disposed to surround the indoor fan (), for exchanging heat between the air blown out of the indoor fan () and refrigerant in the refrigerant circuit (). The heat exchange part () includes a plurality of heat exchangers () separated from each other along the direction of the perimeter thereof and connected in parallel with each other in the refrigerant circuit ().

Indoor unit for air conditioner

To mount a partition cover () in a pipe joint (), a nut () is screwed onto a joint body () to sandwich the partition cover () between the joint body and the nut. At this time, the partition cover is supported so as not to press a sleeve (). As such, an opening () of the pipe joint is sealed while preventing the sleeve from being deformed due to the partition cover being mounted.

Pipe joint cover structure and pipe connection method

A drain water bacteriostatic structure for an air conditioner is provided with a drain panfor holding drain water generated in an air conditionerand an upright antibacterial memberwhich is provided in the drain pan. The antibacterial memberis provided with an antibacterial agentB. The length Lof the antibacterial memberin the up-down direction is set such that the lower end portionof the antibacterial memberis immersed in drain water when the drain water is at the minimum water level Lin the drain pan, and the upper end portionof the antibacterial memberis exposed above the maximum water level Lof drain water in the drain panby a predetermined length H or more.

Drain water bacteriostatic structure for air conditioner

In a flareless-type pipe joint, a pressing surface, which presses a rear end portion of a ferrule in the axial direction and toward the inner periphery of the ferrule, is formed in a joint body or a coupling member in which a cam surface is not formed. The ferrule has a groove that extends radially outward from the inner periphery. By pressing the rear end portion in the axial direction and toward the inner periphery by the pressing surface, the distal portion of the ferrule is pressed against the cam surface and an edge portion of the distal portion is deformed to bite into a pipe. An edge portion of a rear end portion of the inner peripheral surface of the ferrule is deformed to bite into the pipe.

Flareless-type pipe fitting, refrigerating device, and water-heating device

A pipe joint and a method of joining pipes using the pipe joint prevent loss of a sleeve, enhance workability in the pipe joining operation, and ensure sealing performance. The pipe joint may be utilized in a refrigerant device, a heat pump hot water supply device, a closing valve and a water supply piping. The method for connecting piping may be used in an in-the filed piping method. The pipe joint includes a joint body, a fastening member such as a nut, and a sleeve. The sleeve is integrated with the fastening member or the joint body before the fastening member is attached to the joint body. When the fastening member is attached to the joint body, the sleeve is cut off and separated from the fastening member or joint body. When the nut is fully attached, the sleeve bites into the pipe, and the pipe is joined to the joint body.

Pipe joint, refrigeration device, heat pump hot water supply device, closing valve, water supply piping, method of connecting piping, and in-the field piping method

A guide tapered surfaceof a pipe coupling porthas a small diameter portionguiding to a distal end portionof a bite type sleeveto bite into a coupling pipeand a large diameter portionsealing a tapered outer circumferential surfaceof the bite type sleeveby making close contact with the tapered outer circumferential surfaceof the bite type sleeve. A tilt angle &#x3b1;of the small diameter portionrelative to a central axis of the guide tapered surfaceis greater than a tilt angle &#x3b1;of the large diameter portionrelative to the central axis. Therefore, even when a distal end portion of the coupling pipeis not inserted up to an innermost portion of the pipe coupling port, excellent sealing performance is obtained in a portion coupled to the coupling pipe.

Flareless pipe coupling structure, flareless pipe coupling method, and on-site pipe coupling method

A drain pump is provided that reduces the operating noise when the head is low. The drain pump has a pump casing, and an impeller. The pump casing has a drain inlet for sucking in drain water at a lower end part and a drain outlet for discharging drain water at a side part. The impeller has a shaft part disposed extending in a vertical direction inside the pump casing, a main blade disposed on the outer circumferential side of the shaft part, an auxiliary blade disposed on the lower side of the main blade, and a disc shaped dish part disposed between the main blade and the auxiliary blade. The dish part has an annular partition part extending upward from the outer circumferential edge part of the main blade, which is disposed at a position lower than the upper end part of the partition part.

Drain pump, and air conditioner provided therewith

A joint includes a joint main body, a sleeve and a nut. The joint main body has a joining hole and an external threaded part. The nut is threaded onto the external threaded part in a threaded state in which the pipe and the sleeve are inserted through the joining hole. The nut joins the pipe to the joining hole via the sleeve. The sleeve is tightly fitted to the pipe and the joining hole by the threading of the nut to induce deformation that expands radially outward. The deformation prevents insertion of the sleeve into the joining hole to a specific position in an unthreaded state in which the pipe and the sleeve have been pulled out from the joining hole.

Pipe joint

A drain pump is provided that reduces the operating noise when the head is low. The drain pump has a pump casing, and an impeller. The pump casing has a drain inlet for sucking in drain water at a lower end part and a drain outlet for discharging drain water at a side part. The impeller has a shaft part extending in a vertical direction inside the pump casing, a main blade disposed on the outer circumferential side of the shaft part, an auxiliary blade disposed on the lower side of the main blade, and a disc shaped dish part disposed between the main blade and the auxiliary blade. The dish part has an annular partition part extending upward from the outer circumferential edge part of the main blade, which is disposed at a position lower than the upper end part of the partition part.

Disclosed is a drain water discharge structure for an air conditioning apparatus in which at least any one of an internal drain pipe () and an external drain pipe () is formed from an antibacterial metal pipe, thereby to inhibit the generation of slime in the external drain pipe () and to make the external drain pipe () less apt to deterioration.

Drain water discharge structure for air conditioner

In a heat exchanger for an air conditioning system including a plurality of heat exchanger tubes and a plurality of fins secured to outer surfaces of the heat transfer tubes, the fins are of a special constructional form, such as slitted fins having slits formed in flat or convoluted fins or spine fins, and the heat transfer tubes are each formed on its inner wall surface with spiral grooves or two systems of spiral grooves of large number. The heat transfer tubes define therein a refrigerant passage while the adjacent two fins define therebetween an air passage extending past the outer surfaces of the heat transfer tubes.

Growing community of inventors

Sakai, Japan

Haruo Nakata