38results about How to "Lower the supply air temperature" patented technology

The invention relates to a low temperature air supply air conditioner device for naval vessels and a control method thereof. The low temperature air supply air conditioner device comprises an air conditioner, a fresh and return air mixing box which is provided with a primary return air port and a fresh air port, and a PLC control system. The primary return air port is provided with a primary return air valve and a first temperature and humidity sensor; the fresh air is provided with a fresh air valve; the air conditioner is provided wit a secondary return air port; the secondary return air port is provided with a secondary return air valve and a second temperature and humidity sensor; an exhaust box of the air conditioner is provided with a third temperature and humidity sensor; and the first return air valve, the second return air valve, the first temperature and humidity sensor, the second temperature and humidity sensor, the third temperature and humidity sensor and the fresh air valve are all connected with the PLC control system. In the invention, the shell of the air conditioner is provided with a primary air port, the secondary return air port and the fresh air port; a plurality of temperature and humidity sensors are matched with a plurality of air valves to ensure the low temperature air supplying and the temperature control accuracy, exactly control the water supply temperature and effectively control air supply condensation. The device is simple and compact in structure, high in service accuracy of low temperature air, and high in safety. The device is fit for naval vessels and submarines and the like.

The invention discloses a countercurrent plate type dew-point indirect evaporative cooler with an internal dividing structure. The cooler comprises a dew-point indirect evaporative cooler core body arranged in a casing, wherein a wind inlet and a secondary air exhaust opening are formed in the top of the casing, and a primary air supply opening is formed in the bottom of the casing; the dew-point indirect evaporative cooler core body is composed of multiple side-by-side dry channels and wet channels spaced in parallel; a clapboard is arranged between each dry channel and the corresponding wet channel; the surfaces of the clapboards, on the dry channels, are hydrophobic surfaces, and the surfaces of the clapboard, on the wet channels, are hydrophilic surfaces; a dividing hole is formed in the lower part of each clapboard, and part of air in the dry channels enters the corresponding wet channels through the dividing holes and runs in the wet channels as secondary air, and primary air and the secondary air flow reversely; meanwhile, each channel clapboard of the cooler core body comprises a plastic base plate; and one surface of each base plate is flocked by adopting an electrostatic flocking process to obtain the clapboard with the hydrophobic surface and the hydrophilic surface, and the thickness of the clapboard is 0.1-0.4mm.

An air conditioning system is provided, including: an outdoor air conditioner, configured to cool outdoor air at an outdoor temperature into dehumidified air at a dehumidified temperature, to heat the dehumidified air into supply air at a supply air temperature, and to provide the supply air to a plurality of rooms; a plurality of indoor air conditioners provided inside the plurality of rooms, respectively, each indoor air conditioner being configured to draw in input air at an input temperature, to heat or cool the input air into output air at an output temperature, and to provide the output air to a corresponding room; a control circuit configured to determine whether an air conditioning load exists in a set number of the plurality of rooms, and to adjust operation of the outdoor air conditioner to set the supply air temperature based on whether the air conditioning load is determined to exist.

The invention discloses a multi-stage indirect-direct evaporating and cooling air-conditioner unit for vertical heat pipes and round pipes. The multi-stage indirect-direct evaporating and cooling air-conditioner unit comprises two channels which are partitioned and arranged up and down in a unit housing. In the lower channel, two opposite side walls of the unit housing are provided with a fresh air inlet and an air feed inlet respectively, and an air filter a, a heat-pipe cold end of a heat-pipe indirect-evaporating cooler, an air feeder, a vertical-heat-pipe indirect-evaporating cooler, a direct-evaporating cooler and a water baffle are arranged between the fresh air inlet and the air feed inlet according to the inlet direction of fresh air. In the upper channel, two opposite side walls of the unit housing are provided with an air return inlet and an exhaust outlet a respectively, and an air filter b, an air return unit and a heat-pipe hot end of the heat-pipe indirect-evaporating cooler are sequentially arranged between the air return inlet and the air exhaust outlet a according to the inlet direction of return air. An exhaust outlet b is arranged at the top of the unit housing corresponding to the air return unit. The multi-stage indirect-direct evaporating and cooling air-conditioner unit is capable of lowering air-feed temperature of air conditioners, improving workshop environment and enhancing comfortability.

The invention discloses a fresh air conditioning system suitable for a passive extremely-low energy consumption residence. A fluorine coil pipe, a heat exchange device and a tail end air mixing deviceare included. The fluorine coil pipe is connected with an outdoor unit to form a refrigerating and heating circulation loop. The heat exchange device communicates with a fresh air port, an air returnport and an exhaust port and is used for exhausting outdoor fresh air and indoor return air entering from the fresh air port and the air return port through an air outlet and the exhaust port of theheat exchange device after humid-heat exchange is conducted on the outdoor fresh air and the indoor return air. The fluorine coil pipe further communicates with the air outlet of the heat exchange device and is used for conducting condensation or heating on the fresh air which flows through the fluorine coil pipe and is subjected to humid-heat exchange. The tail end air mixing device is provided with a fresh air port and an air return port connected with the fluorine coil pipe and used for conveying mixed fresh air and indoor return air into a room through an inner air supply draught fan afterthe fresh air and the indoor return air subjected to condensation or heating through the fluorine coil pipe are mixed in the tail end air mixing device. The low-temperature air supply tail end air mixing device is adopted for guiding in, mixing and conveying indoor return air and low-temperature supply air at the tail end into the room, and the fresh air is used for bearing the indoor air conditioner load of the passive extremely-low energy consumption residence.

The invention discloses a solar heating and evaporative cooling combined air conditioner used in winter and summer. The solar heating and evaporative cooling combined air conditioner is formed by connecting a two-stage evaporative cooling air conditioner unit used in winter and summer and an angle-adjustable solar power generation and heating integrated device. The solar heating and evaporative cooling combined air conditioner used in winter and summer is good in cooling effect, can be used in winter and summer and is more economic and reasonable.

The invention provides a control method and device for a fresh air system, and the fresh air system. The control method for the fresh air system comprises the steps that whether the concentration of indoor carbon dioxide is less than a preset concentration threshold or not is judged; if the concentration of the indoor carbon dioxide is less than the preset concentration threshold and the first humidity is equal to or greater than the sum value of the second humidity and the preset difference humidity, an ultrasonic atomizer is controlled to be closed, a fan is started, and the gear at the timeof fan starting is arranged to be a set gear; if the concentration of the indoor carbon dioxide is not less than the preset concentration threshold, the fan is started, and the gear at the time of fan starting is determined according to the concentration of the carbon dioxide; according to the gear at the time of fan starting, the cooling load required for fresh air cooling of the fresh air system is obtained; and the gear of the ultrasonic atomizer is controlled according to the cooling load and the temperature of cooling water. According to the control method and device for the fresh air system, and the fresh air system, starting and the starting gear of the fresh air system can be accurately controlled, and the interior of a ventilation pipe can be prevented from mildewing; the fresh air supply temperature can be accurately decreased; and meanwhile, the control method further has the advantages of simple implementation and low cost.

The invention relates to a carbon dioxide trans-critical cycling exhaust air heat recovery fresh air air conditioning unit and a control method thereof. The carbon dioxide trans-critical cycling exhaust air heat recovery fresh air air conditioning unit comprises an air supply heat exchanger, an exhaust air heat exchanger, a compressor, a first throttling device, a second throttling device, a gas-liquid separator, a reheater, a four-way reversing valve, a refrigerant connecting pipe, an air supply fan, an exhaust air fan, a fresh air opening, an air supply opening, an air return opening, an exhaust opening and an air pipe and uses carbon dioxide as a cycling refrigerant. The first throttling device is fully opened in a refrigerating working condition, ensures that the reheater can cool therefrigerant at an outlet of an air cooling device, normally works under a heating working condition and is used for controlling system high pressure. The second throttling device is fully opened in the heating working condition, ensures that the reheater can cool the refrigerant at the outlet of the air cooling device, normally works under the refrigerating working condition, and is used for controlling system high pressure. The air conditioning unit conforms with the future development tendency of an environment-friendly working medium and at the same time increases the cycling efficiency ofthe system.

The invention provides a control method and device of a fresh air system and the fresh air system. The control method of the fresh air system comprises the following steps: judging whether the concentration of indoor carbon dioxide is less than a preset concentration threshold value; if the second humidity is equal to or greater than the sum of the first humidity and the preset difference humidity, controlling a cooling water spraying device to stop spraying, turning on a fan, and setting the gear when the fan is turned on as the set gear; if not, turning on the fan and determining the gear when the fan is started according to the concentration of carbon dioxide; according to the gear when the fan is turned on, acquiring the cooling load required for fresh air cooling of the fresh air system; and controlling the cooling water spraying device according to the cooling load and the temperature of the cooling water. The control method and device of the fresh air system and the fresh air system of the invention can avoid the phenomenon that a large amount of water mist adheres to the bottom of the ventilation duct, and can prevent mildew in the ventilation pipe. The temperature of freshair supply can be reduced accurately. At the same time, the method has the advantages of simple realization and low cost.

The invention provides a control method and device of a fresh air system and the fresh air system. The control method of the fresh air system comprises the following steps that whether the concentration of indoor carbon dioxide is less than a preset concentration threshold value or not is judged; if the concentration of indoor carbon dioxide is less than the preset concentration threshold value and first humidity is equal to or greater than second humidity and a sum value of preset difference value humidity, a control valve is controlled to be turned off, a draught fan is turned on, and a gearwhen the draught fan is turned on is set as a set gear; if not, the draught fan is turned on, and the gear when the draught fan is turned on is determined according to the concentration of carbon dioxide; according to the gear when the draught fan is turned on, cooling load required by fresh air cooling of the fresh air system is acquired; and according to the cooling load and the temperature ofcooling water, the control valve is controlled. According to the control method and device of the fresh air system and the fresh air system, turning on of the fresh air system and the gear during turning can be accurately controlled, mildew in a ventilation pipe is prevented, the fresh air supply temperature can be accurately reduced through a cooling wet film; and meanwhile, the control method ofthe fresh air system has the advantages of simple implementation and low cost.

The invention discloses a high-supercharging air supply cooling device. The high-supercharging air supply cooling device comprises two sets of refrigeration cycle systems. Each set of refrigeration cycle system is composed of a compressor, a condenser provided with a condensation fan and an evaporator. The evaporators of the two sets of refrigeration cycle systems are arranged indoors and distributed front and back in the wind direction respectively. A high-supercharging fan is arranged between the evaporators of two sets of refrigeration cycle boxes. Each evaporator is provided with a temperature sensor. All the temperature sensors are connected with an external controller. The external controller is further in control connection with the condensation fans, the compressors and the high-supercharging fan of the two sets of refrigeration cycle systems. The high-supercharging air supply cooling device can effectively lower the air supply temperature during high supercharging.

The invention discloses an evaporative cooling air conditioning unit based on solar refrigeration and solution dehumidification. The evaporative cooling air conditioning unit comprises a housing; a PV heat collector and a polyethene heat exchanger are erected at the upper part of the housing through a bracket; the polyethene heat exchanger is connected with a plate heat exchanger through a water circulation pipe a for forming a closed circulation loop; the plate heat exchanger communicates with a solution dehumidification unit and an evaporative cooling unit through pipelines sequentially; and the plate heat exchanger, the solution dehumidification unit and the evaporative cooling unit are located in the housing. Through combined use of an evaporative cooling technology, a solution dehumidification technology and a solar refrigeration technology, different refrigeration and heating modes are selected under different environmental conditions, the evaporative cooling air conditioning unit is applicable to a humid area and a low-humidity area, an energy source is saved, and the efficiency is improved. In addition, a dehumidification solution can kill bacteria like staphylococcocci, streptococci, kebsiella pneumoniae and mycetozoan, so that the quality of air is further improved, and the evaporative cooling air conditioning unit has very good practical value.

The invention discloses a low-temperature and low-humidity type air conditioner device. The low-temperature and low-humidity type air conditioner device comprises a compressor, a condenser, a condensation fan, a liquid storage device, a first throttling element, a second throttling element, a first evaporator, a second evaporator, an evaporation fan, a gas-liquid separator, a plurality of temperature sensors, a pipe system and the like, wherein the first evaporator and the second evaporator each are composed of a supercooling pipe group and an evaporation pipe group, the supercooling pipe groups are correspondingly and evenly distributed in the middles of the evaporation pipe groups, an outlet of the liquid storage device is divided into two paths, the first path sequentially passes through the supercooling pipe group of the second evaporator, the first throttling element and the evaporation pipe group of the first evaporator to reach the gas-liquid separator, and the second path sequentially passes through the supercooling pipe group of the first evaporator, the second throttling element and the evaporation pipe group of the second evaporator to reach the gas-liquid separator. During work, the first evaporator and the second evaporator work alternately by controlling the first throttling element and the second throttling element. By the adoption of the unique design, the low-temperature and low-humidity type air conditioner device can be widely applied to multi-stage refrigeration air conditioner projects.