An automatic water discharge device is provided for use with a pneumatically operated apparatus and includes a housing including a water accumulation chamber; an electromagnetic valve coupled to the water accumulation chamber and including a bottom air discharge hole; and a detection mechanism arranged in the housing and in operative coupling with the electromagnetic valve. When the detection mechanism detects moisture entraining gas or air passing through the water accumulation chamber, the electromagnetic valve is activated to allow water to drain through the bottom air discharge hole. As such, operations of automatic detection, accurate draining, and effectively blocking impurities can be all performed and an advantage of maintaining the performance of the pneumatically operated apparatus may also be achieved.

An automatic water discharge device is provided for use with a pneumatically operated apparatus and includes a housing including a water accumulation chamber; an electromagnetic valve coupled to the water accumulation chamber and including a bottom air discharge hole; and a detection mechanism arranged in the housing and in operative coupling with the electromagnetic valve. When the detection mechanism detects moisture entraining gas or air passing through the water accumulation chamber, the electromagnetic valve is activated to allow water to drain through the bottom air discharge hole. As such, operations of automatic detection, accurate draining, and effectively blocking impurities can be all performed and an advantage of maintaining the performance of the pneumatically operated apparatus may also be achieved.

A liquid feeding device that feeds a treatment liquid to a treating device and also recovers the treatment liquid for re-feeding, include feeding tanks having an exhaust passage and an overflow line, and can be switched to one of a feeding mode in which the treatment liquid is fed and a standby mode in which the feeding tank is on standby while accommodating the treatment liquid; a feeding mechanism that feeds the treatment liquid to the treating device from the feeding tank in the feeding mode among the plurality of feeding tanks; a recovery mechanism that recovers and returns the treatment liquid excessive in the treatment device to the feeding tank in the feeding mode; and an on-off mechanism provided in each of the plurality of feeding tanks to block the exhaust passage and the overflow line is provided.

A liquid feeding device that feeds a treatment liquid to a treating device and also recovers the treatment liquid for re-feeding, include feeding tanks having an exhaust passage and an overflow line, and can be switched to one of a feeding mode in which the treatment liquid is fed and a standby mode in which the feeding tank is on standby while accommodating the treatment liquid; a feeding mechanism that feeds the treatment liquid to the treating device from the feeding tank in the feeding mode among the plurality of feeding tanks; a recovery mechanism that recovers and returns the treatment liquid excessive in the treatment device to the feeding tank in the feeding mode; and an on-off mechanism provided in each of the plurality of feeding tanks to block the exhaust passage and the overflow line is provided.

The invention pertains to a float switch apparatus for use in activating one or a series of pumps. The float switch apparatus has particular use in combination with sump pump vessels. The apparatus includes an electrical chamber which is sealed from the vessel atmosphere and contains at least one switch controlling the activation of at least one pump, configured to pump liquid from the vessel. Within the electrical chamber there is a magnetic activation device which slides vertically along one wall of the chamber. On the opposing side of the chamber there is a magnetic coupling head which couples to the activation device magnetically through the coupling wall. The coupling head is mounted on top of a float rod having a float mechanism at the bottom thereof. The entire float switch apparatus is mounted in the vessel such that when the water reaches a predetermined level the float moves the float rod vertically and thus the coupling head is moved vertically. Since the coupling head is coupled to the magnetic activation device in the sealed electrical chamber, the activation device is also moved vertically and activates at least one switch for controlling the activation of a pump. The liquid in the vessel in then pumped out and the float rod moves down vertically in response. At a predetermined point the magnetic activation device no longer activates the switch controlling the pump and the pump is turned off. This device allows the electrical components of the float switch apparatus to remain sealed from the vessel atmosphere.

The invention pertains to a float switch apparatus for use in activating one or a series of pumps. The float switch apparatus has particular use in combination with sump pump vessels. The apparatus includes an electrical chamber which is sealed from the vessel atmosphere and contains at least one switch controlling the activation of at least one pump, configured to pump liquid from the vessel. Within the electrical chamber there is a magnetic activation device which slides vertically along one wall of the chamber. On the opposing side of the chamber there is a magnetic coupling head which couples to the activation device magnetically through the coupling wall. The coupling head is mounted on top of a float rod having a float mechanism at the bottom thereof. The entire float switch apparatus is mounted in the vessel such that when the water reaches a predetermined level the float moves the float rod vertically and thus the coupling head is moved vertically. Since the coupling head is coupled to the magnetic activation device in the sealed electrical chamber, the activation device is also moved vertically and activates at least one switch for controlling the activation of a pump. The liquid in the vessel in then pumped out and the float rod moves down vertically in response. At a predetermined point the magnetic activation device no longer activates the switch controlling the pump and the pump is turned off. This device allows the electrical components of the float switch apparatus to remain sealed from the vessel atmosphere.

Disclosed herein are devices, systems, and methods for accurately determining fluid level using Ultra Wide-Band (UWB) positioning or localization. UWB utilizes a radio frequency (RF) technology to enable the accurate measurement of the time-of-flight of a radio signal and UWB positioning can operate in Time-Difference-of-Arrival (TDoA) mode, Two-Way-Ranging (TWR) mode, and Phase-Difference-of-Arrival (PDoA) mode. The systems disclosed herein include multiple anchor devices having a UWB antenna(s) and positioned in fixed location(s) over the fluid to be measured. The anchor devices serve as reference points for UWB communication with a remote float device, which emits RF signals and floats on the surface of the fluid to be measured. The anchor devices may include, or be in communication with, a processor which receives and/or measures RF signals, generates timestamps, calculates distance(s) between the remote float device and an anchor device, calculates fluid level, calculates an angle-of-arrival (AoA), or any combination thereof.

Disclosed herein are devices, systems, and methods for accurately determining fluid level using Ultra Wide-Band (UWB) positioning or localization. UWB utilizes a radio frequency (RF) technology to enable the accurate measurement of the time-of-flight of a radio signal and UWB positioning can operate in Time-Difference-of-Arrival (TDoA) mode, Two-Way-Ranging (TWR) mode, and Phase-Difference-of-Arrival (PDoA) mode. The systems disclosed herein include multiple anchor devices having a UWB antenna(s) and positioned in fixed location(s) over the fluid to be measured. The anchor devices serve as reference points for UWB communication with a remote float device, which emits RF signals and floats on the surface of the fluid to be measured. The anchor devices may include, or be in communication with, a processor which receives and/or measures RF signals, generates timestamps, calculates distance(s) between the remote float device and an anchor device, calculates fluid level, calculates an angle-of-arrival (AoA), or any combination thereof.

Various example embodiments relate to an automatic drain system for use with a fluid water separator. The automatic drain system includes a liquid-in-fuel sensor configured to detect a liquid level in a water sump. A pump includes an inlet in fluid communication with the water sump and an outlet in fluid communication with the inlet. The pump has an active state and an inactive state. The active state causes the pump to draw liquid in from the inlet and direct liquid toward the outlet. A battery is configured to power the pump. A circuit board is operably connected to the pump and battery. The circuit board includes at least one circuit having a first state and a second state. The first state prevents power flow from the battery to the pump. The second state facilitates power flow from the battery to the pump, transitioning the pump from inactive to active.

Various example embodiments relate to an automatic drain system for use with a fluid water separator. The automatic drain system includes a liquid-in-fuel sensor configured to detect a liquid level in a water sump. A pump includes an inlet in fluid communication with the water sump and an outlet in fluid communication with the inlet. The pump has an active state and an inactive state. The active state causes the pump to draw liquid in from the inlet and direct liquid toward the outlet. A battery is configured to power the pump. A circuit board is operably connected to the pump and battery. The circuit board includes at least one circuit having a first state and a second state. The first state prevents power flow from the battery to the pump. The second state facilitates power flow from the battery to the pump, transitioning the pump from inactive to active.