摘要:
A failure diagnostic device for accurately determining a failure of a discharge valve. A failure diagnostic device (50) serves to perform failure diagnostic of a discharge valve (62) installed in a discharge flow channel (32) of an anode discharge gas that is discharged from a fuel cell stack (20). The device comprises a detection unit (70) for detecting a status quantity of the anode discharge gas between a discharge port (27) for the anode discharge gas of the fuel cells tack (2) and the discharge valve (62) and a determination unit (51) for determining a failure of the discharge valve (62) based on the status quantity of the anode discharge gas detected by the detection unit (70) and a failure determination quantity corresponding to the operating state of the fuel cell stack (20).
摘要:
The present invention is a fuel cell system including a fuel cell, an injector which is provided in a hydrogen supply channel of the fuel cell and which adjusts a gas state of an upstream side of the hydrogen supply channel to supply a gas toward a downstream side, and a control device which drives and controls the injector. The control device controls an operation of the injector based on a driving state of an associated device including the fuel cell system 1.
摘要:
A fuel cell system of the present invention includes a fuel cell, a supply channel which supplies, to the fuel cell, a fuel gas supplied from a fuel supply source, a variable gas supply device which adjusts a gas state on an upstream side of this supply channel to supply the gas to a downstream side, a control section which performs PI control of a gas supply command amount with respect to the variable gas supply device, and an abnormality judgment section to judge whether or not the variable gas supply device is abnormal. The controller uses, as a part of a correction term of the PI control, a learning term constituted by integrating an I term only in a case where an operation state of the fuel cell satisfies predetermined learning allowable conditions. The abnormality judgment section judges based on this learning term whether or not the variable gas supply device is abnormal.
摘要:
A failure diagnostic device for accurately determining a failure of a discharge valve. A failure diagnostic device (50) serves to perform failure diagnostic of a discharge valve (62) installed in a discharge flow channel (32) of an anode discharge gas that is discharged from a fuel cell stack (20). The device comprises a detection unit (70) for detecting a status quantity of the anode discharge gas between a discharge port (27) for the anode discharge gas of the fuel cells tack (2) and the discharge valve (62) and a determination unit (51) for determining a failure of the discharge valve (62) based on the status quantity of the anode discharge gas detected by the detection unit (70) and a failure determination quantity corresponding to the operating state of the fuel cell stack (20).
摘要:
A multi-room air conditioning system includes an outdoor unit and a plurality of indoor units connected in parallel to the outdoor unit. A compressor frequency and combustion control calculator reads a load level for each indoor unit from a load coefficient table using a differential temperature calculated by a differential temperature calculator and a rated capacity stored in a rated capacity memory. The compressor frequency and combustion control calculator then multiplies a sum of the load levels by a predetermined constant and adds a compensation value thereto to obtain a frequency value. This value is used to control the compressor. The compressor frequency and combustion control calculator also sets a target combustion level using the frequency value for control of a refrigerant heater mounted in the outdoor unit.
摘要:
Disclosed is a fuel cell system including a fuel cell, a fuel supply passage through which a fuel gas supplied from a fuel supply source flows to the fuel cell, an on/off valve which regulates the state of the gas on the upstream side of the fuel supply passage to supply the gas to the downstream side thereof, a sensor which detects the state of the gas in the fuel supply passage, and control means for controlling the on/off valve based on a value detected by the sensor. The control means stops the opening/closing operation of the on/off valve when the sensor falls into an abnormal state.
摘要:
There is disclosed a fuel cell system including a fuel cell, a fuel supply system to supply a fuel gas to the fuel cell, an injector which adjusts a gas state on an upstream side of the fuel supply system to supply the gas to a downstream side, and a control unit which drives and controls the injector in a predetermined drive cycle. The control unit sets the drive cycle of the injector in accordance with an operation state of the fuel cell.
摘要:
Hydrogen leaking from a hydrogen cylinder has a lower specific gravity than air, thus rises in a cylinder housing space, and reaches a ventilating opening constituted by a group of slits formed in an upper surface of a roof cover. At this time, the ventilating opening is formed in a position above the hydrogen cylinder, and thus the leaking hydrogen can reach the ventilating opening in a short distance as compared with the case where the ventilating opening is formed in a position apart from the position above the hydrogen cylinder. The ventilating openings are provided in a plurality of locations, and thus the leaking hydrogen reaches the closest ventilating opening. The hydrogen gas reaches the ventilating opening, passes upward therethrough and flows outside.
摘要:
The amount of a reactant gas supplied to a fuel cell is properly maintained even in the case where a failure of reactant gas supply takes place in the middle of a drive cycle of a valve device. Provided is a fuel cell system including: a fuel cell; a gas supply flow path for supplying the reactant gas to the fuel cell; a valve device which is provided in the gas supply flow path and driven at a predetermined drive cycle; a controller which controls the drive of the valve device such that the reactant gas supplied to the fuel cell reaches a target gas state; and a sensor which measures the gas state of the reactant gas on a downstream side of the valve device, wherein the controller drives the valve device independently of the predetermined drive cycle in the case where the controller detects that the difference between the target gas state and a gas state measured by the sensor has exceeded a predetermined value.
摘要:
The amount of a reactant gas to be supplied can be controlled efficiently with a reduction in the effort required. A control unit judges whether or not the state where an atmospheric pressure detection value detected by an atmospheric pressure sensor does not fall within the range of 0.6 V to 4.48 V has continued for or longer than 50 ms. If the state has not continued for or longer than 50 ms, the control unit outputs an atmospheric pressure correction value by converting the atmospheric pressure detection value into an atmospheric pressure value and then passing the atmospheric pressure value through a low-pass filter. On the other hand, if the state has continued for or longer than 50 ms, the control unit outputs 101.3 kPa.abs which serves as a substitute value for the atmospheric pressure correction value. The control unit then converts respective pressure detection values detected by pressure sensors into gate pressure values, and adds the atmospheric pressure correction value to each of the gate pressure values so as to calculate absolute pressures of the respective reactant gases in an oxidant gas pipe system and a hydrogen gas pipe system. The control unit controls the supply amount of each of the reactant gases with respect to a fuel cell based on these absolute pressures.