Abstract: An indoor unit includes a heat exchanger provided on the downstream side of a fan and formed with a plurality of lower end portions in a vertical cross section from the front side to the back side of a casing, a plurality of drain pans provided below the lower end portions of the heat exchanger and configured to collect drain water occurring on the heat exchanger, and a drain channel provided between the drain pans and configured to be a flow channel of the drain, and a connecting port to which a drain hose configured to drain the drain water collected by the drain pans to the outside of the casing, and one of the drain pans is arranged to a level equal to or higher than the level of the other drain pan, and the drain channel is provided on the drain pan arranged on the back side of the casing.

Abstract: A heat exchanger including plate fins stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in. The heat exchanger exchanges heat between first and second fluids flowing, respectively, inside and outside the heat exchanger tubes. Each of the fins includes a substantially planar main body and cut-raised portions extending from the main body and disposed at an upstream side of flow of the second fluid. Each of the cut-raised portions corresponds to a respective heat exchanger tube and includes first and second opposed side ends connected to the main body of the fin. The first side end is nearer to the corresponding heat exchanger tube than is the second side end, the first side end is longer than the second side end, and the first side end is disposed at a downstream side of the flow of the second fluid, facing the corresponding heat exchanger tube.

Abstract: A total heat exchange element includes a first flow passage and a second flow passage extending orthogonal thereto. The first flow passage is an undulating flow passage that has a rectangular cross section and is formed by positioning a first wave-form plate member and a second wave-form plate member on top of each other and with a predetermined interval therebetween, and further causing spacers to hermetically close two lateral portions with respect to the traveling direction of the fluid. The second flow passage is a straight flow passage that has a substantially triangular cross section and is formed between a flat-plate-like member and one of the first and the second wave-form plate members.

Abstract: A heat exchange element includes a first flow passage and a second flow passage extending orthogonal thereto. The first flow passage is an undulating flow passage that has a rectangular cross section and is formed by positioning, a first wave-form plate member and a second wave-form plate member on top of each other and with a predetermined interval therebetween, and further causing spacers to hermetically close two lateral portions with respect to the traveling direction of the fluid. The second flow passage is a straight flow passage that has a substantially triangular cross section and is formed between a flat-plate-like member and one of the first and the second wave-form plate members, when the flat-plate-like member is positioned on the wave-like form of the one of the first and the second wave-form plate members so as to be in close contact therewith.

Abstract: An indoor unit includes a heat exchanger provided on the downstream side of a fan and formed with a plurality of lower end portions in a vertical cross section from the front side to the back side of a casing, a plurality of drain pans provided below the lower end portions of the heat exchanger and configured to collect drain water occurring on the heat exchanger, and a drain channel provided between the drain pans and configured to be a flow channel of the drain, and a connecting port to which a drain hose configured to drain the drain water collected by the drain pans to the outside of the casing, and one of the drain pans is arranged to a level equal to or higher than the level of the other drain pan, and the drain channel is provided on the drain pan arranged on the back side of the casing.

Abstract: An indoor unit includes: a casing formed with a suction port and a blow-out port; a plurality of fans provided in parallel in the casing; a heat exchanger provided on the downstream side of the fans and on the upstream side of the blow-out port; a horizontal wind direction control vane provided at the blow-out port to control the horizontal direction of an airflow blown out from the blow-out port; a vertical wind direction control vane provided at the blow-out port to control the vertical direction of the airflow blown out from the blow-out port; and an infrared ray human detection sensor configured to detect the position of a person present in a room, and air volumes, the orientation of the horizontal wind direction control vane, and the orientation of the vertical wind direction control vane of the fans are each controlled according to results of detection by the infrared ray sensor.

Abstract: An indoor unit includes a casing having a suction port formed on an upper portion and a blow-out port on a lower side of a front surface portion, an axial-flow or mixed-flow fan provided on the downstream side of the suction port in the casing, and a heat exchanger provided in the casing at a position on the downstream side of the fan and on the upstream side of the blow-out port. The heat exchanger includes a plurality of fins arranged side by side with predetermined gaps therebetween and a plurality of heat-transfer tubes penetrating through the plurality of fins. The heat exchanger is configured in such a manner that the air-flow resistance of an area facing the outer peripheral side of the fan is larger than the air-flow resistance of an area facing a center portion of the fan.

Abstract: A blower that can reduce noise and enhance efficiency by improving a blade structure of the blower used for, for example, an outdoor equipment of an air conditioner. An impeller includes plural blades attached to a peripheral surface of a boss at intervals in a peripheral direction, and a trailing edge of the blade has a protrusion-shaped part in which its central part in a radial direction is curved to expand to a suction side. With such a structure, a discharge velocity of air can be made uniform along the radial direction of the blade, and it becomes possible to reduce noise and to enhance efficiency.

Abstract: A cooling apparatus with high strength and good heat radiation characteristics. In the cooling apparatus, a heat exchanger is joined to an evaporator disposed on the lower side in a face to face manner; a containing unit of the heat exchanger includes a heat exchanger high temperature liquid outlet, and a two-phase fluid inlet in a joint portion with the evaporator; an outlet header of the heat exchanger includes an intermediate liquid outlet at a joint portion with the evaporator; and the evaporator includes a two-phase fluid outlet in the joint portion with the heat exchanger in opposition to the two-phase fluid inlet of the containing unit, and including an intermediate liquid inlet at the joint portion with the heat exchanger in opposition to the intermediate liquid outlet of the outlet header.

Abstract: A cooling apparatus with high strength and good heat radiation characteristics. In the cooling apparatus, a heat exchanger is joined to an evaporator disposed on the lower side in a face to face manner; a containing unit of the heat exchanger includes a heat exchanger high temperature liquid outlet, and a two-phase fluid inlet in a joint portion with the evaporator; an outlet header of the heat exchanger includes an intermediate liquid outlet at a joint portion with the evaporator; and the evaporator includes a two-phase fluid outlet in the joint portion with the heat exchanger in opposition to the two-phase fluid inlet of the containing unit, and including an intermediate liquid inlet at the joint portion with the heat exchanger in opposition to the intermediate liquid outlet of the outlet header.

Abstract: A heat exchanger includes fins arranged in parallel with each other with a predetermined spacing along the rotational axis direction of a blower. Heat exchanger tubes are inserted into the fins to form rows along a longitudinal direction of the fins connected to each other along the airflow direction, to form refrigerant channels. A branch portion is provided to connection portions of the heat exchanger tubes to increase or decrease the number of paths in the refrigerant channels. Refrigerant flows through each of the refrigerant channels passing through paths mutually different at least at one portion between the refrigerant inlet and the refrigerant outlets, flows along one direction from the windward-side row to the leeward-side row, or from the leeward-side row to the windward-side row in the airflow direction, in sequence between rows. One-path portion is provided in the most windward-side row heat exchanger tubes.

Abstract: A heat exchanger including plate fins stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in. The heat exchanger exchanges heat between first and second fluids flowing, respectively, inside and outside the heat exchanger tubes. Each of the fins includes a substantially planar main body and cut-raised portions extending from the main body and disposed at an upstream side of flow of the second fluid. Each of the cut-raised portions corresponds to a respective heat exchanger tube and includes first and second opposed side ends connected to the main body of the fin. The first side end is nearer to the corresponding heat exchanger tube than is the second side end, the first side end is longer than the second side end, and the first side end is disposed at a downstream side of the flow of the second fluid, facing the corresponding heat exchanger tube.

Abstract: A heat exchanger including plate fins and, the tubes fins being stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in a fin-stacking direction. The heat exchanger exchanges heat between fluids flowing, respectively, inside and outside the heat exchanger tubes, through the heat exchanger tubes and the fins. Each of the fins includes cut-raised portions with a bridge shape having leg and beam segments. The cut-raised portions associated with each of the heat exchanger tubes are located substantially only in a region of the fin satisfying Ws=(1??)Dp+?D ?>0.5, where Ws is spread width of the cut-raised portions in a direction (column direction) extending along an end of the fin on the upstream side of the second fluid, and D is outer diameter of the heat exchanger tube. Dp is alignment pitch of the heat exchanger tubes in the column direction.

Abstract: To improve the heat transfer performance of a heat exchanger and achieve an air conditioner having high energy efficiency. The heat exchanger 15 includes a plurality of fins 1 that is arranged in parallel with each other with a predetermined spacing along the rotational axis direction of a blower 5; heat exchanger tubes 2 that are substantially perpendicularly inserted into the fins 1 so as to form a plurality of rows along the longitudinal direction of the fins 1 connected to each other along the airflow direction, to thereby form refrigerant channels; and a branch portion that is provided to connection portions of the heat exchanger tubes 2, and that partially increases or decrease the number of paths in the refrigerant channels.

Abstract: A blower includes: an impeller on which there are arranged axial flow blades 40 mounted at circumferential intervals to an outer peripheral surface of a boss; a case surrounding the impeller; and a bell mouth cylindrically constricted to guide gas into the case, wherein an inner diameter of the bell mouth is smaller than an outer diameter of the impeller. Further, each blade has, in the radial direction, a sweepforward wing portion situated on the boss side and exhibiting a positive advance ratio value, and a sweepback wing portion situated on the outer peripheral side of the blade and exhibiting a negative advance ratio value, with the arc length of each blade increasing from the boss side toward the outer peripheral side. Therefore, it is possible to achieve an improvement in ventilation efficiently, through an increase in static pressure and to achieve a reduction in noise.

Abstract: The invention provides a blower which can reduce noise and enhance efficiency by improving a blade structure of the blower used for, for example, an outdoor equipment of an air conditioner There is provided an impeller 1 in which plural blades 3 attached to a peripheral surface of a boss 2 at intervals in a peripheral direction are disposed, and a trailing edge of the blade 3 has a protrusion-shaped part 30 in which its central part in a radial direction is curved to expand to a suction side. By adopting such a structure, a discharge velocity of air can be made uniform along the radial direction of the blade 3 and it becomes possible to reduce noise and to enhance efficiency.

Abstract: A heat exchanger including plate fins and, the tubes fins being stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in a fin-stacking direction. The heat exchanger exchanges heat between fluids flowing, respectively, inside and outside the heat exchanger tubes, through the heat exchanger tubes and the fins. Each of the fins includes cut-raised portions with a bridge shape having leg and beam segments. The cut-raised portions associated with each of the heat exchanger tubes are located substantially only in a region of the fin satisfying Ws=(1??)Dp+?D ?>0.5, where Ws is spread width of the cut-raised portions in a direction (column direction) extending along an end of the fin on the upstream side of the second fluid, and D is outer diameter of the heat exchanger tube. Dp is alignment pitch of the heat exchanger tubes in the column direction.

Abstract: A blower includes: an impeller on which there are arranged axial flow blades 40 mounted at circumferential intervals to an outer peripheral surface of a boss; a case surrounding the impeller; and a bell mouth cylindrically constricted to guide gas into the case, wherein an inner diameter of the bell mouth is smaller than an outer diameter of the impeller. Further, each blade has, in the radial direction, a sweepforward wing portion situated on the boss side and exhibiting a positive advance ratio value, and a sweepback wing potion situated on the outer peripheral side of the blade and exhibiting a negative advance ratio value, with the arc length of each blade increasing from the boss side toward the outer peripheral side. Therefore, it is possible to achieve an improvement in ventilation efficiently, through an increase in static pressure and to achieve a reduction in noise.

Abstract: An electronic apparatus containing in a rack a plurality of electronic equipments each having heat generating electronic parts, and provided with fins for dispersing heat from the electronic equipment, involves a problem of low heat radiating efficiency. Providing a wind-path separation covers formed in a manner to cover top portions of the fins increases an amount of an air flowing into the fin-inbetween wind paths.

Abstract: An electronic apparatus receiving therein a plurality of electronic equipments, each of which has heat generating electronic parts and which are spaced from one another, has caused a problem that amounts of an air flowing into wind paths between the respective electronic equipments involve scatter. To solve the above-mentioned problem, the electronic apparatus is constructed such that the pressure-loss adjusting plates 12 are provided on the fins 5 facing those wind paths of large inflowing air volume among the wind paths formed between the respective electronic equipments 2 received in the rack 1.