Abstract: Provided is a refrigeration apparatus that is capable of determining an increased possibility of ignition due to a refrigerant leak. An air conditioner (100) including a refrigerant circuit (10) includes a refrigerant gas sensor (81) and an oxygen gas sensor (82). The refrigerant circuit (10) has an R32 refrigerant charged therein, and performs a refrigeration cycle. The refrigerant gas sensor (81) detects a refrigerant gas in a room where at least a portion of the air conditioner (100) is located. The oxygen gas sensor (82) detects an oxygen gas in the room.

Abstract: A refrigeration apparatus includes a compressor, a first heat exchanger, an expansion mechanism, and a second heat exchanger. The compressor compresses low-pressure gas refrigerant and discharges high-pressure gas refrigerant. The first heat exchanger condenses high-pressure gas refrigerant and discharges high-pressure liquid refrigerant during an air-cooling operation, or evaporates low-pressure gas-liquid mixed refrigerant and discharges low-pressure gas refrigerant during an air-heating operation. The expansion mechanism has metal components. High-pressure liquid refrigerant passes through the expansion mechanism, and becomes low-pressure gas-liquid mixed refrigerant. The second heat exchanger evaporates low-pressure gas-liquid mixed refrigerant and discharges low-pressure gas refrigerant during an air-cooling operation, or condenses high-pressure gas refrigerant and discharges high-pressure liquid refrigerant during an air-heating operation. The refrigerant contains at least 60 wt % of R32.

Abstract: Provided is an indoor unit for a refrigeration apparatus that is capable of detecting a refrigerant leak while suppressing condensation on a refrigerant gas sensor. An indoor unit (50) for an air conditioner (100) including a refrigerant circuit (10) includes a casing (60), an indoor fan (53), and a refrigerant gas sensor (81). The refrigerant circuit (10) has refrigerant charged therein, and performs a refrigeration cycle. The casing (60) houses at least a portion of the refrigerant circuit (10), and has a blow-out port (64) that opens in a direction other than an up-down direction. The indoor fan (53) is housed in the casing (60), and generates an air flow (F) directed from the blow-out port (64) to outside the casing (60). The refrigerant gas sensor (81) is capable of detecting a refrigerant gas below a bottom surface (63) of the casing (60).

Abstract: A method of searching for a refrigerant leak location is provided which can easily specify the refrigerant leak location. In the method of searching for the refrigerant leak location in a refrigeration apparatus (100) in which a refrigerant is charged and which includes a refrigeration circuit (10) performing a refrigeration cycle, the refrigeration circuit (10) is prepared in a state that the refrigerant containing an odor component is charged therein, and the refrigerant leak location is specified by letting a dog capable of detecting the odor component to run along the refrigeration circuit (10).

Abstract: When refrigerant gas leaks in an indoor unit, the leaked refrigerant gas locally accumulates in an area of the indoor space. This air conditioner includes an indoor unit having one or more outlets, and an outdoor unit connected to the indoor unit, wherein a flammable refrigerant or a mildly flammable refrigerant is used. The air conditioner includes a refrigerant gas sensor disposed in the indoor unit. When refrigerant gas is detected by the refrigerant gas sensor, a control is performed such that air is blown from the one or more outlets at a minimum air speed or higher, said minimum air speed being preset in accordance with the rated cooling capacity of the air conditioner.

Abstract: A total of n light receiving surface finger electrodes are arranged on a light receiving surface. A total of (n?1)×m1/m2+1 second collecting electrodes are arranged on a back surface. On a plane of projection parallel, m2 light receiving surface finger electrodes and ml back surface finger electrodes are included an interval between a first position and a second position. On the plane of projection, the auxiliary wiring is provided at a third position at which only the light receiving surface finger electrode is present. A length of the auxiliary wiring is smaller than a length of the back surface finger electrode.

Abstract: The solar battery module according to one embodiment of the present invention is provided with: multiple solar battery cells; a first protective member, a second protective member, a first wiring material for connecting adjacent solar cells; and a second wiring material for connecting strings, that have been obtained by connecting the multiple solar cells via the first wiring material, to each other. The first wiring material and/or the second wiring material has a conductive core material and a colored layer that covers a surface on the side of the core material that faces the first protective member. The colored layer absorbs at least 30% of visible light having a wavelength of 380-780 nm.

Abstract: In the solar cell module including a plurality of solar cells interconnected with wiring members, each of the solar cells includes a plurality of front-side finger electrodes that are disposed on a light-receiving surface of the solar cell and connected with tabs and a plurality of rear-side finger electrodes that are disposed on a rear surface of the solar cell and connected with tabs. Rear-side auxiliary electrode sections are arranged in regions, which is wider than the front-side finger electrodes, on the rear surface opposite to regions where the front-side finger electrodes are present.

Abstract: To reduce the possibility that temperature of refrigerant discharged from a compressor of a refrigeration apparatus becomes excessively high by controlling torque of a motor built into the compressor, the compressor includes the motor having rotation thereof controlled by inverter control. An inverter controller controls torque of the motor using inverter control when operation frequency of the compressor is at least one value within a range of from 10 Hz to 40 Hz. When at least the operation frequency is within the range of from 10 Hz to 40 Hz, torque of the motor is controlled, and under a predetermined condition in which temperature of refrigerant discharged from the compressor easily becomes excessively high, a device controller controls devices provided in a refrigerant circuit such that refrigerant sucked into the compressor is placed in a wet vapor state.

Abstract: In the solar cell module including a plurality of solar cells interconnected with wiring members, each of the solar cells includes a plurality of front-side finger electrodes that are disposed on a light-receiving surface of the solar cell and connected with tabs and a plurality of rear-side finger electrodes that are disposed on a rear surface of the solar cell and connected with tabs. Rear-side auxiliary electrode sections are arranged in regions, which is wider than the front-side finger electrodes, on the rear surface opposite to regions where the front-side finger electrodes are present.

Abstract: A refrigeration apparatus includes a heat source unit, a utilization unit, and a liquid refrigerant pipe and gas refrigerant pipe. The utilization unit has utilization unit internal pipelines. The liquid refrigerant pipe and the gas refrigerant pipe connect the heat source unit and the utilization unit internal pipelines. A refrigerant circulates through the heat source unit, the utilization unit, the liquid refrigerant pipe, and the gas refrigerant pipe. The refrigerant contains a compound represented by a molecular formula having one or more carbon-carbon unsaturated bonds. A disproportionation inhibitor for reducing a disproportionation reaction of the refrigerant is applied to at least a part of inner surfaces of the liquid refrigerant pipe, the gas refrigerant pipe, and the utilization unit internal pipelines.

Abstract: A refrigeration apparatus pertaining to the invention can suppress clogging due to polymers formed by the polymerization of refrigerant and improve safety. The refrigeration apparatus is equipped with a refrigeration cycle in which a compressor, a condenser, an expansion mechanism, and an evaporator are connected in a loop. The refrigeration apparatus is equipped with a polymer catcher. The polymer catcher is attached to piping interconnecting an outlet side of the compressor and an inlet side of the condenser and catches polymers of refrigerant circulating in the refrigeration cycle. The refrigerant includes a compound represented by a molecular formula having one or more carbon-carbon unsaturated bonds.

Abstract: A refrigerant recovery system is equipped with an extraction pipe, a stabilizer holding container, a recovery pipe, a recovery container, and a recovery device. The extraction pipe is connectable to a refrigerant extraction port of an air conditioning apparatus. The stabilizer holding container is connected to the extraction pipe—and holds a stabilizer. The stabilizer holding container causes refrigerant guided by the extraction pipe to come into contact with the stabilizer. The recovery pipe guides the refrigerant discharged from the stabilizer holding container. The recovery container is connected to the recovery pipe and recovers the refrigerant guided by the recovery pipe. The recovery device causes the refrigerant to move from the refrigerant extraction port to the recovery container. The refrigerant includes a compound represented by a molecular formula having one or more carbon-carbon unsaturated bonds.

Abstract: In a method for manufacturing a solar cell, a photoelectric conversion element, which has a surface whose outer periphery is surrounded by a plurality of sides, and a coating having light diffusivity are prepared. The coating is applied to an outer peripheral area of the surface by screen printing in a direction from a lower side, which is one of the sides, toward an upper side, which is one of the sides and which is opposed to the lower side such that an application amount of the coating to be applied along the lower side is smaller than an application amount of the coating to be applied along the upper side.

Abstract: A solar cell module is provided with: a plurality of solar cell elements each having a surface; a light diffusion portion provided in an outer peripheral area of the surface; and connection members which connect the plurality of solar cell elements. The outer peripheral area has restricted areas where formation of the light diffusion portion is restricted, in a part thereof, and the restricted areas are provided in positions where the outer peripheral area and the connection members intersect. The solar cell element may have, on the surface, bus bar electrodes which extend along the connection members. The restricted areas may be provided in the vicinity of ends of the bus bar electrodes.

Abstract: A solar cell module manufacturing method is provided. This method includes: arranging a printing plate over a solar cell element in proximity to a surface of the solar cell element; providing a coating material on the printing plate; and moving a squeegee in a first direction so as to push out the coating material via the printing plate to the solar cell element, thereby applying the coating material in an outer peripheral area of the surface of the solar cell element.

Abstract: A determination device includes a refrigerant circuit, an operation determination unit, and a refrigerant determination unit. The refrigerant circuit is made of a compressor, a condenser, an expansion mechanism, and an evaporator that are circularly connected. In a refrigeration cycle operation in accordance with a quantity of heat required by the condensers or the evaporators, the operation determination unit determines whether the refrigeration cycle operation can be normally carried out or not. Upon determination that the refrigeration cycle operation cannot be normally carried out, the refrigerant determination unit determines whether a refrigerant in the refrigerant circuit is regenerable or not, based on a result of the determination. Thus the determination device is provided by which an effort involved with determination as to whether the refrigerant is regenerable or not can be reduced.

Abstract: A solar cell module is provided with: a plurality of solar cell elements each having a surface; a light diffusion portion provided in an outer peripheral area of the surface; and connection members which connect the plurality of solar cell elements. The outer peripheral area has restricted areas where formation of the light diffusion portion is restricted, in a part thereof, and the restricted areas are provided in positions where the outer peripheral area and the connection members intersect. The solar cell element may have, on the surface, bus bar electrodes which extend along the connection members. The restricted areas may be provided in the vicinity of ends of the bus bar electrodes.

Abstract: To provide a solar cell having improved photoelectric conversion efficiency and a solar cell module. A solar cell (10) is provided with a photoelectric conversion portion (20), a light receiving surface electrode (21a) and a back surface electrode (21b). The light receiving surface electrode (21a) is arranged on the light receiving surface (20a) of the photoelectric conversion portion (20). The back surface electrode (21b) is arranged on the back surface (20b) of the photoelectric conversion portion (20). The back surface electrode (21b) includes metal film (21b1) and an electrical connection electrode (21b2). The metal film (21b1) at least partially covers the back surface (20b). The electrical connection electrode (21b2) is arranged on the metal film (21b1).

Abstract: A refrigerating device includes a refrigerant circuit through which a refrigerant flows. A refrigerant collection container through which the refrigerant flows in a refrigeration cycle operation is detachably provided in the refrigerant circuit.