Abstract:
A louver has vertical blades arranged in a frame alternately in a staggered relation from front to back in a front and a rear row. The blades in at least the front row have a web oriented substantially perpendicularly to the plane of the frame and substantially parallel to the jambs, a pair of front flanges extending in opposite directions generally laterally from a front edge of the web, and a pair of rear flanges extending in opposite directions generally laterally from a rear edge of the web. The webs subdivide the air flow volume within the frame into flow channels, each of which is partially blocked laterally by the front flanges and the rear flanges of the blades of the front row. The blades of the rear row have flanges that block the portions of the channels between the extremities of the flanges of the blades of the front row. The flanges of the adjacent blades overlap so that there is no straight path through the flow channels along which air and water entrained in the air can pass perpendicularly to the plane of the frame and the air flows along a tortuous flow path of approximately constant area. The flanges are configured to control and trap water impinging on them.
Abstract:
In an air conditioning system for automobiles including a temperature control apparatus having temperature setting device for setting a vehicle compartment temperature, a temperature sensing device for sensing an actual vehicle compartment temperature, a temperature difference signal device for generating a difference signal in accordance with a difference between the set vehicle compartment temperature and the sensed actual vehicle compartment temperature, and air flow control device for controlling the rate of air flow from a blower so as to provide varying air flow rates up to a maximum air flow rate in accordance with the value of the difference signal, a detecting device for detecting that the air condition system is at a heating operation, and a control arrangement responsive to the output from the detecting device and the value of the difference signal for controlling the air flow rate control device so that the rate of air flow from the blower is maintained at a predetermined flow rate which is less than the maximum air flow rate independent of the difference between the set temperature and the actual vehicle compartment temperature when the difference exceeds a predetermined value.
Abstract:
A forced air heating and cooling system employs a water source heat pump as the primary heating source and as a back-up or supplementary source of cooling. Supplementary heating is supplied by an electrical heater such as resistance heater, while primary cooling is provided by a water coil heat exchanger. Separate thermostats control the heat pump on the one hand, and the resistance heater and water coil heat exchanger on the other hand; the two thermostats can be combined in a simple unit. The thermostats automatically control two valves which control system water flow. For cooling, a first valve opens to permit water flow in series through first the water coil and then the heat pump. For heating, only the second valve is opened to bypass the water coil and deliver water directly to the heat pump. The water is ground water derived from a well, spring or lake. The thermostats automatically switch on the heat pump, heater and/or heat exchanger to effect the necessary heating or cooling.
Abstract:
An automotive air conditioning apparatus is provided which, in raising the temperature inside a vehicle cabin from a low level to a preset higher level in a maximum cooling mode or in lowering the cabin temperature from a high level to a preset lower level in a maximum heating mode, suitably controls in an initial stage of the procedure the revolution speed of a blower but does not drive an air mix door at all to keep it at an existing opening degree. When the revolution speed of the blower reaches a predetermined lowest speed, the air mix door begins to be driven to vary its opening degree progressively and suitably while, at the same time, a first reference temperature level for deactivating a compressor associated with a cooler is shifted to a second reference temperature level.
Abstract:
An air conditioning system furnishing temperature conditioned air to a plurality of zones each of which has its own zone damper controlled by its own space thermostat. The system has an air discharge temperature sensor downstream of the temperature conditioning heat exchanger which is connected to a microprocessor controller for controlling a plurality of stages of temperature conditioning apparatus such as heating or cooling apparatus and a damper motor control for controlling the entry of outdoor air into the system. A reset thermal comfort sensor located in a representative zone or area is connected to the microprocessor controller for varying the controlled temperature of the supplied discharge air by operating the outdoor air damper motor and the multi-stage temperature conditioning apparatus to maintain the best use of outdoor air for cooling and the most efficient operation of refrigeration cooling apparatus by ensuring maximum air delivery to the heat exchangers during the operation of the mechanical cooling apparatus.
Abstract:
An economical energy-saving air-conditioning system for cooling air in an enclosure requiring year-around cooling. An outdoor heat exchanger is operative in a recirculating liquid closed-loop cooling system. A temperature controlled actuator provides continuous free cooling when the outside temperature is approximately 35.degree. to 40.degree. F. or less; and provides free pre-cooling of the air when the outside temperature is in the 35.degree. to 65.degree. F. range. The closed-loop comprises conventional components for summer temperature cooling; and, in less-than summer temperatures the present invention utilizes the outside heat exchanger to provide cool heat exchange liquid to a (free) cooling coil positioned to confront the air stream in advance of a refrigerant coil. Reheat for dehumidification is provided in an embodiment wherein thermal energy is taken from the waste heat of the refrigerant system.
Abstract:
Temperature and humidity electrical/electronic control circuits and apparatus to maintain a room at a constant temperature and humidity. The control system is adapted to an environmental condition controller for year-around cooling utilizing a liquid recirculating to an outside coil for free cooling or free reheat dehumidification. The controls provide a sequencing function to actuate one or more temperature and/or humidity conditioners in response to the degree and percentage of change. The circuit provides a ramp function signal for proportional control over an initial temperature range of free cooling and step controls over other predetermined temperature ranges. The circuit comprises a high fidelity ramp generator linearly responsive to the degree of temperature change up to a predetermined set point. A dehumidification signal is developed and fed to the same ramp generator to carry out air cooling to remove moisture. The system provides a reheat ramp signal operable, in accordance with the need for reheat, along with a staging of auxiliary heating feature.
Abstract:
A sliding damper plate is positioned between the blower and heat exchanger of a down draft gun-type furance for mobile home usage and includes cam means at opposite ends thereof for actuating associated switches coupled to the furnace and air conditioning control circuits. When the damper is closed to cut off the flow path through the furnace to permit a separate air conditioner unit to utilize the existing heating ductwork in a mobile home, one of the switches is actuated to permit operation of the air conditioning unit. Alternatively, when the damper is moved to an open position for heating operation, the air conditioning unit is inactivated and a second switch closed by the cam to permit furnace operation. If the damper is partially open or closed, both the furnace and air conditioning unit are deactivated.
Abstract:
A multiple zone forced air type air conditioning system is disclosed in which the amount of atmospheric air admitted to the system is governed according to sensed temperature conditions of air being circulated through the warmest zone. An atmospheric air sensing control unit responds to atmospheric air temperature and moisture levels to minimize introduction of atmospheric air to the system, notwithstanding the temperature of air being circulated through the warmest zone, when atmospheric air temperature is within a predetermined temperature range but contains more than a predetermined amount of moisture, and when atmospheric air temperatures are higher than the temperature range. The control unit enables atmospheric air to be introduced into the system according to the air temperature being circulated through the warmest zone when the atmospheric air is within the temperature range and contains less than the predetermined moisture content as well as when the air temperature is below the temperature range regardless of moisture content.