112results about How to "Improve air conditioning performance" patented technology

A system and method of selecting air intake between 100% fresh air mode and 100% recirculated air mode for optimum heating / cooling performance, fuel economy and / or high voltage (HV) battery power consumption is disclosed. The system and method includes a partial recirculation control strategy in which the air inlet door is moved progressively to any position by taking into account cooling / heating loads and cabin fogging probability. As cooling / heating loads increase the air inlet door moves toward 100% recirculation mode. As fogging probability increases the air inlet door moves toward 100% fresh air mode. By selectively choosing a position between 100% recirculation and 100% fresh air, fuel economy and / or HV battery power consumption is optimized without compromising passenger comfort or causing fogging on interior glass surfaces. In cooling applications the compressor load is minimized and air conditioning performance is improved due to the reduced evaporator cooling load. The direct result of this improvement is increased fuel economy in the case of the internal combustion vehicle, reduced engine on time in the case of the hybrid electric vehicle (due to reduced HV battery power consumption), and reduced HV battery power consumption in the case of the hybrid electric vehicle (HEV) and the electric vehicle (EV). In heating applications, as the heating load is reduced the fuel economy of the internal combustion (IC) engine will be improved, the engine on time is reduced in the case of the HEV, and HV battery power consumption is reduced in the case of the EV.

The present invention discloses guide blades of an axial flow fan shroud for guiding the air blown by an axial flow fan in an axial direction, and more particularly, to a guide blade structure capable of preventing the backflow of high temperature heat from an engine room toward a condenser. A guide blade 35 of an axial flow fan shroud 30 comprises: a leading edge 37 for introducing the air blown by an axial flow fan 10 including a number of blades 12; a trailing edge 39 extended from the leading edge 37 to downstream; and an air flow guide surface 38 for guiding the blown air between the leading and trailing edges 37 and 39, wherein if a first outlet area a is defined by at a radius r from a root in the total length R of an angle of projection Aout of the guide blade 35 and a second outlet area b is defined by the remainder, the angle of projection Aout increases as approaching a tip with respect to an axial line in the second outlet area b.

An air conditioning apparatus for a vehicle includes a front air-conditioning unit for adjusting a temperature of air blown toward a front seat side in a passenger compartment, and a rear air-conditioning unit for adjusting a temperature of air blown toward a rear seat side in the passenger compartment. In the front air-conditioning unit, a ratio between an amount of air passing through a front heater core and an amount of air bypassing the front heater core is adjusted by an air mixing door, and the temperature of air blown toward the front seat side in the passenger compartment is adjusted by the rotation of the air mixing door. On the other hand, in the rear air-conditioning unit, a flow control valve for controlling a flow rate of hot water flowing into a rear heater core is provided, and the temperature of air blown toward the rear seat side in the passenger compartment is adjusted by the flow control valve. Thus, the air conditioning apparatus has a downsized rear air-conditioning unit while preventing air-conditioning capacity for the passenger compartment from being lowered.

Air conditioning system and method for controlling the same are disclosed, the air conditioning system including user input means, display means for providing an environmental factor parameter setting up menu, a memory unit for storing the environmental factors, and parameters for the environmental factors, a ventilating fan, an air cleaning fan, and a control unit for calculating an environment index by using parameters of the environment factors set by the user, and controlling the ventilating fan and the air cleaning fan according to the environment index, thereby maximizing a sense of comfortability of the user, and minimizing health hazards such as multiple chemical sensitivity.

Method for controlling an air conditioning system including the steps of measuring a Predicted Mean Vote (PMV) according to thermal environmental parameters of a room, performing a first air conditioning mode if the PMV falls outside of a preset allowable range, for controlling an air flow speed and a room temperature, and performing a second air conditioning mode if the PMV falls within the allowable range, for controlling ventilation and air cleaning operation, whereby improving the IAQ (Indoor Air Quality) further by enhancing the PPIS by performing air conditioning so that the PMV reaches to an optimum range, and then, by generating active materials (oxygen / terpene).

An air conditioning apparatus for a vehicle includes a front air-conditioning unit for adjusting a temperature of air blown toward a front seat side in a passenger compartment, and a rear air-conditioning unit for adjusting a temperature of air blown toward a rear seat side in the passenger compartment. In the front air-conditioning unit, a ratio between an amount of air passing through a front heater core and an amount of air bypassing the front heater core is adjusted by an air mixing door, and the temperature of air blown toward the front seat side in the passenger compartment is adjusted by the rotation of the air mixing door. On the other hand, in the rear air-conditioning unit, a flow control valve for controlling a flow rate of hot water flowing into a rear heater core is provided, and the temperature of air blown toward the rear seat side in the passenger compartment is adjusted by the flow control valve. Thus, the air conditioning apparatus has a downsized rear air-conditioning unit while preventing air-conditioning capacity for the passenger compartment from being lowered.

In a vehicle air conditioner, a heater core is disposed in an air conditioning case to form front and rear cool air bypass passage through which cool air bypasses the heater core, and front and rear air mixing doors are disposed to independently adjust temperature of air blown toward a front seat side and temperature of air blown toward a rear seat side in a passenger compartment. A switching door is disposed to partition front and rear passage portions of the heater core from each other at a partition position, and to shut the rear passage portion at a rear shutting position. The switching door and the rear air mixing door are connected to a common operation mechanism to be operatively linked with each other.

Air conditioning system and method for a high-voltage battery of a vehicle are provided. The system includes a first heat exchanger that is disposed within a battery housing and a first blower that supplies air to the first heat exchanger. A peltier element is combined with the first heat exchanger and a first surface of the peltier element comes into contact with the first heat exchanger. A second heat exchanger is disposed in an air extraction unit of a trunk room and a second blower supplies air to the second heat exchanger, to discharge air inside the trunk room to an exterior after performing heat exchange. A cooling line operates as a coolant circulating line, and a first end of the cooling line comes into contact with a second surface of the peltier element and a second end performs heat exchange between the second end and the second heat exchanger.

Disclosed are CMOS device and CMOS inverter. The CMOS device includes a substrate having active lines extending in a first direction and defined by a device isolation layer, the substrate being divided into an NMOS area, a PMOS area and a boundary area interposed between the NMOPS and the PMOS areas and having the device isolation layer without the active line, a gate line extending in a second direction across the active lines and having a first gate structure on the active line in the first area, a second gate structure on the active line in the second and a third gate structure on the device isolation layer in the third area. The electrical resistance and parasitic capacitance of the third gate structure are smaller than those of the NMOS and the PMOS gate structures. Accordingly, better AC and DC performance of the CMOS device can be obtained.

Embodiments of the present invention disclose a method for manufacturing a Fin Field-Effect Transistor. When a fin is formed, a dummy gate across the fin is formed on the fin, a spacer is formed on sidewalls of the dummy gate, and a cover layer is formed on the first dielectric layer and on the fin outside the dummy gate and the spacer, then, an self-aligned and elevated source / drain region is formed at both sides of the dummy gate by the spacer, wherein the upper surfaces of the gate and the source / drain region are in the same plane. The upper surfaces of the gate and the source / drain region are in the same plane, making alignment of the contact plug easier; and the gate and the source / drain region are separated by the spacer, thereby improving alignment accuracy, solving inaccurate alignment of the contact plug, and improving device AC performance.

This is a multidirectional blower air conditioner. It contains outdoor set, indoor set, blower, evaporator, four-side pass way, front blow outlet, bak blow outlet, right-side blow outlet, left-side blow outlet, blow inlet, change-diameter pipe, and blow-pipe. On the top part of indoor set cover at the front back, right and left side, all install the blow outlet, and increase blow pipe and four-sides pass way. The evaporator is installed inside of the blowpipe. The air pass through evaporator and four-sides pass way, to realize multidirectional blow in the room, to make the indoor air-more gentle, and more evenly.

An air conditioning system 1 includes a primary compressor (an engine-driven compressor 6) driven by a primary driving source (an engine 2) and a secondary compressor (a motor-driven compressor 7) driven by a secondary driving source (a motor 3). When a required cooling capability is equal to or greater than a predetermined value, the air conditioning system 1 causes the primary compressor (the engine-driven compressor 6) to be driven by the primary driving source (the engine 2) and adjusts the rotational speed of the secondary compressor (the motor-driven compressor 7), whereas when the required cooling capability is equal to or smaller than the predetermined value, the air conditioning system 1 causes the secondary compressor (the motor-driven compressor 7) to be driven by the secondary driving source (the motor 3) so as to control the rotational speed of the primary compressor (the engine-driven compressor 6).

In a vehicle air conditioner, a heater core is disposed in an air conditioning case to form front and rear cool air bypass passage through which cool air bypasses the heater core, and front and rear air mixing doors are disposed to independently adjust temperature of air blown toward a front seat side and temperature of air blown toward a rear seat side in a passenger compartment. A switching door is disposed to partition front and rear passage portions of the heater core from each other at a partition position, and to shut the rear passage portion at a rear shutting position. The switching door and the rear air mixing door are connected to a common operation mechanism to be operatively linked with each other.

The system incldues the outdoor conditioner, the air blow area and the air return area under the raised floor, ultra mute and thin type air blow terminal under the floor of each room, the indoor typeair handle and the fresh air machine hidden in the air return port in each room. The air handle through the refrigerant pipe is connected to the outdoor conditioner. The uptake and return ports are connected to the air blow area and the air return area. The air in the air return area with the fresh air being mixed is treated, then loaded to the air blow area through the terminal to each room. Thecommunication and electrical cables are under the floor. The airflow of the conditioner can be arranged and limited in 2 square meter action space so as to reduce the energy consumption.

Provided is an air conditioning system using ground heat. The system includes one or more indoor units, at least one outdoor unit, a ground heat exchanger, and a plurality of auxiliary heat sources. The one or more indoor units condition indoor air. The at least one outdoor unit communicates with the indoor units via a plurality of pipes, and includes an outdoor heat exchanger where heat exchange occurs. The ground heat exchanger is connected with the outdoor heat exchanger of the outdoor unit, and laid under the ground to allow heat to be exchanged between ground heat and a circulating medium circulating through the ground heat exchanger. The plurality of auxiliary heat sources are installed on one side of the outdoor unit to assist heat exchange of the outdoor heat exchanger. Two or more auxiliary heat sources are simultaneously used, or one of them is selectively used.

A window which can ventilate and separate noise comprises a window frame and a window sash in the window frame. The window sash of the invention is a combining window sash composed of a layer of single-sash pushing and pulling window and a layer of double-sashes folding window, wherein, the single-sash pushing and pulling window is mounted in one side of the window frame by hinges, and can only shelter half of the window frame when closing the window; the double-sashes folding window is mounted in another side of the window frame by hinges, and can completely unfold and shelter wholly the window frame when closing the window. Two ends of the single-sash pushing and pulling window and the double-sashes folding window are respectively mounted with filtering nets. The invention can still have better ventilation condition, meanwhile reducing the noise without mechanical ventilation device. In addition, the silencing window can save space of mounting mechanical ventilation device, and the sound absorption material or the filtering net has the action of filtrating air, and the air indoor can be purified. So the initial investment and the operating economical efficiency are better, the installation and maintenance are more convenient.

The method applies refrigerant mixed by two or above compositions to change circulating media concentration through a separation unit; when load is increased at heat pump operation system separates composition of high boiling point through separation unit to raise concentration of low boiling point media in circulation for enhancing ability of heating at low temperature environment; when load is decreased high boiling point composition of high concentration stored in low pressure liquid storage tank at bottom part of separation unit is absorbed systematically through heating means to decrease heat generating amount of system.

A differential to single-ended signal transfer circuit that allows increased gain and improved AC performance while reducing power supply voltage requirements. The transfer circuit includes a first operational transconductance amplifier (OTA), a second operational amplifier (OPA), first and second controlled current sources, a third current source, and first and second bipolar junction transistors. The inverting and non-inverting inputs of the transfer circuit are provided at the inverting input and the non-inverting input, respectively, of the OTA, which is coupled to the first and second controlled current sources to form a current mirror with tracking feedback. The output voltage of the transfer circuit is provided at the emitter of the first transistor, the base of which is connected to the non-inverting input INp. The first transistor is coupled to the third current source in an emitter follower configuration to provide both current gain and impedance matching. The base of the second transistor is connected to the inverting input of the transfer circuit. The OPA is coupled between the respective emitters of the first and second transistors in a voltage follower configuration.

An air conditioner for a vehicle uses a hybrid compressor (4) including a first compression mechanism driven by a first drive source (2) and a second compression mechanism driven by a second drive source (5), and a single discharge port connected to the first and the second compression mechanisms. The operation of the hybrid compressor is controlled by a controller (15) in accordance with a control mode. The controller has a first operation mode in which the first compression mechanism alone is driven, a second operation mode in which the second compression mechanism alone is driven, a third operation mode in which the first and the second compression mechanisms are simultaneously driven, and a fourth operation mode in which the first and the second compression mechanisms are simultaneously stopped. Depending upon various conditions, the controller selects, as the control mode, one of the first, the second, the third, and the fourth operation modes.

An engine cooling system for a vehicle includes a water pump disposed to supply an engine with a coolant and a radiator disposed to cool heated coolant of the engine by exchanging heat with outside air. The system may include: a control valve that is disposed at one side of the engine to control flow rate and flow passage of coolant; a first passage that connects the control valve with the radiator and connects the radiator with the water pump; a TOC that is disposed between an outlet of the radiator and the water pump to be connected through the first passage; a second passage that connects the TOC with the control valve and directly supplies the TOC with the coolant exhausted from the engine; and a heater that is disposed in a third passage that bypasses the engine to connect the control valve with the water pump.

The present invention relates to an air conditioner system, in which an air-cooled condenser mounted on a refrigerant circulation line between a water-cooled condenser and an expansion valve and a blower fan for blowing air to the air-cooled condenser are arranged at one side of the water-cooled condenser in a state of being disposed in a row in the air flow direction and are arranged within the width of the one side of the water-cooled condenser, thereby enabling the enhancement of installability and assemblability inside an engine room by simplifying and reducing the package, reducing noise of the blower fan and securing adequate cooling performance because of the blower fan disposed between two air-cooled heat exchangers even when inflowing air is insufficient, such as in an idling condition.

An automotive vehicle air conditioning system has air introduced into an air conditioning case. The introduced air is always discharged to both sides of a passenger compartment regardless of the air conditioner mode while the air conditioning system maintains the amount of air discharged through defrost openings in a defrost mode. Air leakage between both sides of a mode door and the air conditioning case is effectively prevented by a cover carried by the mode door without additional sealing to improve air conditioning performance.

The disclosed operation method of a heat pump-type vehicle air conditioning system involves a step for setting a cold operating mode for raising the output air temperature of the air conditioner by means of a heater or a normal operating mode for raising the heating COP; a step for detecting the temperatures inside and outside the vehicle; and a step which, by selecting either the cold operating mode or the normal operating mode on the basis of the detected temperatures inside and outside of the vehicle, is for bypassing a condenser, controlling the opening of an electronic expansion valve contained in a bypass unit connected in series to a gas / liquid separating liquid coolant storage unit downstream of the aforementioned heater, and adjusting the pressure drop applied to the coolant.

The invention relates to a rotary compressor and a control method thereof, and the rotary compressor comprises a motor part and a two-stage compression type compression mechanism part which are arranged in a sealed housing, wherein the motor part comprises a stator and a rotor, the compression mechanism part comprises a first cylinder, a second cylinder, a crankshaft for driving a first piston and a second piston to rotate eccentrically in a first cylinder compression cavity and a second cylinder compression cavity, a main bearing and an auxiliary bearing, the main bearing and the auxiliary bearing are used for supporting the crankshaft, the end parts of a first sliding sheet and a second sliding sheet are connected with the peripheries of the first piston and the second piston respectively, and gas which is spitted from the first cylinder compression cavity into the sealed housing is sucked into the second cylinder compression cavity. A cooling medium injection device communicated with the second cylinder compression cavity is arranged on the second cylinder compression cavity. The rotary compressor has the characteristics of high air-conditioning ability, high efficiency, safety, reliability and a wide application range and can be popularized and applied to heat pump type air conditioners.

The present invention provides a heat exchanger in which the diameter of the heat transfer tube on the liquid side of the heat exchanger is smaller than that of the heat transfer tube on the gas side, while suppressing the reduction of heat transfer efficiency outside the tube and improving the heat transfer efficiency , and the manufacturing method of the heat exchanger adapted thereto. A heat exchanger (1) has: a plurality of fins (2) arranged at predetermined intervals in a plate thickness direction; and a plurality of heat transfer tubes (3) attached so as to pass through the plurality of fins in the plate thickness direction. As shown in Fig. 4 and Fig. 5, the heat sink (2) has a shape whose width continuously decreases from (W1) to (W2) from one side to the other side. The plurality of heat transfer tubes (3) are composed of two or more different diameter tubes, and the large diameter heat transfer tubes are arranged on the upper part of the heat exchanger (1), and the small diameter ones are arranged on the lower part of the heat exchanger (1). heat transfer tube.