214 results about "Humidistat" patented technology

Irrigation systems, moisture sensors and related methods having a sensor embedded in the ground to sense moisture and help control watering. The sensor is responsive to capacitance changes from ground moisture variations. The sensor uses spaced insulated electrodes which are mounted within a granular filled chamber within a water-permeable shell. The sensor is mounted as part of a ground unit that also includes a high frequency driver that excites the sensor. The ground unit further has a detector circuit which produces a moisture indicating signal based on the capacitance which varies with ground moisture. Also disclosed are controllers that electrically isolate the ground units so that reliable moisture signals can be obtained and used to control irrigation. The controllers can be configured to provide multiple zone operation using a shared controller having shared or independent moisture adjusters.

A refrigerant system includes a controller that enables the system to dehumidify the air in a room without relying on a humidistat and without having to operate the system's compressor and electric heater at the same time. To dehumidify the air, the system's compressor, supply air fan, and outside air damper are controlled in a manner similar to other systems operating in a cooling mode when the room temperature is above a certain setpoint temperature. When the room temperature falls below the setpoint, however, the operation changes significantly. The controller closes the outside air damper, decreases the speed of the fan, and continues operating in this manner until the room temperature decreases to a subcooling temperature limit. The subcooling temperature limit is less than a predetermined limit that is used during the system's normal cooling mode.

A television image receiver (1) includes: an internal pressure regulating valve (5) provided above a tightly sealed cabinet (2), for allowing ventilation inside and outside the cabinet (2); and moisture adjusters (7), each having a moisture absorbing function, fixed inside the cabinet (2). The internal pressure regulating valve (5) includes a ventilation filter (6), which allows air and water vapor to pass therethrough but prevents water from permeating therethrough, inside a valve body (50). The internal pressure regulating valve (5) alleviates change in pressure inside the cabinet (2). Water vapor outside the cabinet (2) enters the cabinet (2) through the internal pressure regulating valve (5). When a temperature inside the cabinet (2) is decreased, the moisture adjuster (7) absorbs the water vapor to decrease the relative humidity, thus preventing occurrence of condensation.

A steamed humidifier for use with a forced air heating system includes a steam nozzle mounted in the plenum of the heating system and connected to a water feed line connected to a continuous pressurized water source. The water feed line is made of a thermal conducting material and is coiled about a heating element wherein the heating element and conductive coil are substantially surrounded by an insulation barrier. The water feed line is controlled by a solenoid operated valve that will be activated only when the heater is on and a humidistat detects that humidity is required by the area being serviced by the forced hot air system.

A forced airflow air conditioning system includes a humidifier which is operable to humidify air bypassed from a supply air plenum to a return air duct or vice versa, the humidifier airflow being controlled by a damper closure member which is operably connected to a bimetal spring actuator or to an electric motor, both responsive to temperature of air flowing through the system. One embodiment includes an electric motor connected to the damper closure member and in circuit with a humidistat for opening the damper when humidification is required.

The invention discloses an unorganized-dust dust suppressant dust restraining rate testing and evaluating device and a method. The unorganized-dust dust suppressant dust restraining rate testing and evaluating device mainly comprises an axial flow fan, an experiment cabin, and a measuring amount adjusting and controlling device; the measuring amount adjusting and controlling device is composed of a temperature and humidity regulator, a smoke dust sampling device, and an electrical low pressure impactor; the axial flow fan is connected with an experiment cabin high speed wind section via flexible connection; the axial flow fan is connected with the temperature and humidity regulator; the experiment cabin is divided into the experiment cabin high speed wind section, an experiment cabin wind direction adjusting section, an experiment cabin low speed section, and an experiment cabin air exhaust section along wind direction tendency; the top of the experiment cabin high speed wind section is provided with testing ports; a wind direction adjusting device is arranged between the experiment cabin wind direction adjusting section and the experiment cabin low speed section; the top of the experiment cabin low speed section is provided with a twin-fluid atomization nozzle and a material falling port, the bottom is provided with a wastewater discharge hole, and the side surface is provided with testing ports; and the smoke dust sampling device and the electrical low pressure impactor are connected with the testing ports. The unorganized-dust dust suppressant dust restraining rate testing and evaluating device is convenient and accurate for testing, is reliable, and is capable of stimulating environmental parameters accurately.

The invention relates to a multifunctional personal space device. Wherein, according to the ergonomics theory, it uses present material to assemble a small sealed space in which people can sit; then it uses temperature adjuster, humidity adjuster, air flow adjuster, smell adjuster, combined lighter, multimedia computer, plane liquid crystal display, music center, and central controller to control relative parameters of said sealed space; therefore, user can set its ideal personal space.

An air purification system for indoor air ventilation and purification includes an air cleaner box, a fresh air inlet, a room A air return port, a room A air supply port, a mixed air duct, a fan and a purifier, and further includes a fresh air control valve and an air return electric valve, the air purification system can be also provided with a room B air return port and a room B air supply port besides the room A air return port and the room A air supply port, wherein all parts are sequentially connected inside the air cleaner box. In addition to the above, the air purification system can be a wood air cleaner box and can be combined with wood furniture, connected with a temperature regulator, provided with a humidity regulator, combined with a nature air outlet and provided with a positive pressure air outlet. The air purification system has effects of regulating fresh air quantity, temperature and humidity in indoor environment and positive pressure ventilation, one set of purification device is shared by two rooms, so that the whole indoor air reaches comfortableness of cleanness, oxygen enrichment and appropriate temperature and humidity and all-weather operation requirement. The air purification system has functions of decoration and rapid installation.

The invention relates to a cathode side gas humidity adjusting system and method for a proton exchange membrane fuel cell, and the system comprises an air filter, an air compressor, an intercooler, anair humidifier, a fuel cell stack, an exhaust back pressure valve, a tail gas processor, a humidity regulator, a three-way valve, and a fuel cell control unit. An outlet of the fuel cell stack is connected with an inlet of the humidity regulator, and the humidity regulator is connected with the air humidifier. The air humidifier is connected with the three-way valve, and the fuel cell control unit is connected with a water content sensor and a humidity regulator in the fuel cell stack. The humidity of air entering the fuel cell stack can be automatically adjusted according to the actual working requirements of the fuel cell stack, the phenomenon that the interior of the stack is too dry or too wet is avoided, the water balance in the stack is maintained, the output performance of the fuelcell is effectively improved, the operation stability of the fuel cell is guaranteed, and the reliability and durability of the stack are improved.

A refrigerant system includes a controller that enables the system to dehumidify the air in a room without relying on a humidistat and without having to operate the system's compressor and electric heater at the same time. To dehumidify the air, the system's compressor, supply air fan, and outside air damper are controlled in a manner similar to other systems operating in a cooling mode when the room temperature is above a certain setpoint temperature. When the room temperature falls below the setpoint, however, the operation changes significantly. The controller closes the outside air damper, decreases the speed of the fan, and continues operating in this manner until the room temperature decreases to a subcooling temperature limit. The subcooling temperature limit is less than a predetermined limit that is used during the system's normal cooling mode.

An air purifier for indoor ventilation purification and circulation purification comprises an air purifier box, an outdoor air duct, an outdoor air inlet, a room A return air inlet, an indoor return air inlet, a room A air supply outlet, a mixed-air duct, a fan, a purifier I and a purifier II. The air purifier for the indoor ventilation purification and the circulation purification is characterized in that a room B return air inlet and a room B air supply outlet can be further arranged apart from the room A return air inlet and the room A air supply outlet; the outdoor air duct is connected with the outdoor air inlet, the room A return air inlet and the room B return air inlet are communicated with the indoor return air inlet, one side of the mixed-air duct is connected with the outdoor air inlet and the indoor return air inlet, the other side of the mixed-air duct is connected with one side of the purifier I, the other side of the purifier I is connected with one side of the fan, the other side of the fan is connected with one side of the purifier II, and the other side of the purifier II is connected with the room A return air supply outlet and the room B air supply outlet. The air purifier can be connected to a temperature and humidity regulator, so that the whole indoor air can meet comfort requirements for purification, oxygen enrichment and moderate temperature and humidity.