Fluid Machine Device

Abstract

A fluid machine device includes a plurality of fluid machines that discharge a fluid; a worn state detection unit that detects a worn state of the fluid machine; a pressure detection unit that measures a pressure from the fluid machines; and a control unit that controls the plurality of fluid machines. The control unit determines whether or not there is the fluid machine that is worn, and performs control to start operation of the fluid machine that is not worn when the pressure is insufficient.

1 . A fluid machine device comprising:
 a plurality of fluid machines that discharge a fluid;   a worn state detection unit that detects a worn state of the fluid machine;   a pressure detection unit that measures a pressure from the fluid machines; and   a control unit that controls the plurality of fluid machines,   wherein the control unit uses any one of temperature, current, input electric power, or operation time to determine whether or not there is the fluid machine that is worn, and   the control unit performs control to start operation of the fluid machines that are not worn when the pressure is insufficient, and causes the fluid machine that is worn to start operating when operation of all the fluid machines that are not worn is started but the pressure is still insufficient.   
     
     
         2 . The fluid machine device according to  claim 1 ,
 wherein when there is the fluid machine in operation that is worn, and the pressure is sufficient, the control unit performs control to stop operation of the fluid machine that is worn.   
     
     
         3 . The fluid machine device according to  claim 1 ,
 wherein when only the fluid machine that is worn is the fluid machine at stop, and the pressure is insufficient, the control unit performs control to start operation of the fluid machine that is worn.   
     
     
         4 . The fluid machine device according to  claim 1 ,
 wherein the control unit determines when the pressure is insufficient, based on a lower limit pressure, and determines when the pressure is sufficient, based on a stop pressure.   
     
     
         5 . The fluid machine device according to  claim 3 ,
 wherein when there are a plurality of the fluid machines that are worn, and the pressure is insufficient, the control unit performs control to start operation of the fluid machines that are worn.   
     
     
         6 . The fluid machine device according to  claim 4 ,
 wherein the stop pressure of the fluid machine that is worn is set to a pressure lower than the stop pressure of the fluid machine that is not worn, and   the control unit determines when the pressure is sufficient, based on the stop pressure.   
     
     
         7 . The fluid machine device according to  claim 4 ,
 wherein the control unit calculates an expected stop pressure reach time taken to reach the stop pressure, and determines that the pressure is sufficient, when the expected stop pressure reach time is shorter than a time that is determined.   
     
     
         8 . The fluid machine device according to  claim 4 ,
 wherein the control unit calculates an expected lower limit pressure reach time taken to reach the lower limit pressure, and determines that the pressure is insufficient, when the expected lower limit pressure reach time is shorter than a time that is determined.   
     
     
         9 . The fluid machine device according to  claim 1 ,
 wherein the control unit stores the number of times of determination of the fluid machines that are determined as being worn, and   when the number of times of determination is more than the number of times that is determined, the fluid machines are stopped as a failure.   
     
     
         10 . The fluid machine device according to  claim 1 ,
 wherein the worn state detection unit is a temperature sensor that measures a temperature of the fluid machine.   
     
     
         11 . The fluid machine device according to  claim 1 ,
 wherein the worn state detection unit is a current detector that measures a current flowing through an electric motor that drives the fluid machine.   
     
     
         12 . The fluid machine device according to  claim 1 ,
 wherein the worn state detection unit is an electric power detector that measures an electric power to be consumed by an electric motor that drives the fluid machine.   
     
     
         13 . The fluid machine device according to  claim 1 ,
 wherein the worn state detection unit is a vibration detector that measures vibration of the fluid machine.   
     
     
         14 . The fluid machine device according to  claim 1 ,
 wherein the worn state detection unit is an air amount detector that measures a discharge air amount of the fluid machine.   
     
     
         15 . The fluid machine device according to  claim 1 ,
 wherein the worn state detection unit is a noise detector that measures noise of the fluid machine.   
     
     
         16 . The fluid machine device according to  claim 1 ,
 wherein the worn state detection unit is an operation time detector that measures an operation time of the fluid machine.   
     
     
         17 . The fluid machine device according to  claim 1 ,
 wherein in a case of an abnormality in which a measured value from the worn state detection unit is more than a second threshold value higher than a first threshold value for determining whether or not there is wear, the control unit causes the fluid machine, which is detected as having an abnormality, to stop as a failure.   
     
     
         18 . The fluid machine device according to  claim 1 ,
 wherein when all the fluid machines at stop are the fluid machines that are not worn, and the pressure is insufficient, the control unit preferentially causes the fluid machine having a shortest operation time to start operating among the fluid machines at stop, and   when all the fluid machines in operation are the fluid machines that are not worn, and the pressure is sufficient, the control unit preferentially causes the fluid machine having a longest operation time to stop operating among the fluid machines in operation.   
     
     
         19 . The fluid machine device according to  claim 1 ,
 wherein the fluid machine is a scroll compressor, and   a drive unit that drives the scroll compressor and an operation unit are housed in a package.   
     
     
         20 . A fluid machine system comprising:
 a plurality of fluid machine bodies that discharge a fluid; and   a control unit that controls the plurality of fluid machine bodies,   wherein the control unit determines which one of a normal state, a worn state, or an abnormal state is a state of each of the fluid machine bodies, and   the control unit causes the fluid machine bodies in a normal state to start operating when a pressure of the fluid discharged from the plurality of fluid machine bodies is insufficient, and causes the fluid machine bodies in a worn state to start operating when all the fluid machine bodies in a normal state are operated but the pressure is still insufficient.   
     
     
         21 . The fluid machine system according to  claim 20 ,
 wherein the control unit sets a stop pressure for stopping an operation for each of the fluid machine bodies, and   the stop pressure of the fluid machine body in a worn state is set to be lower than the stop pressure of the fluid machine body in a normal state.   
     
     
         22 . The fluid machine system according to  claim 20 ,
 wherein at least one of current, temperature, input electric power, noise, and operation time is used to determine a state of each of the fluid machine bodies.