101results about How to "Improve heating performance" patented technology

A method for controlling a heat pump system is provided with air conditioning means connected to a controller and including a plurality of valves and expansion valves connected to each other through a refrigerant line and a bypass line, a compressor, an accumulator, an evaporator, an exterior condenser, an interior condenser, and an HVAC module having a PTC heater and a door at a warming mode, a cooling mode, a dehumidification mode, a dehumidification/defrosting mode, or an extremely low temperature dehumidification/defrosting mode according to selection of a driver.

A heat pump system may include a cooling assembly disposed on a vehicle to circulate electric devices with coolant through a cooling line, wherein the cooling assembly includes a radiator disposed at a front side of the vehicle, uses a water pump to circulate coolant through the cooling line, and cools the supplied coolant through heat exchange with outside air, and a cooling fan that blows wind through the radiator, an air conditioning assembly connected to a refrigerant line connected to the cooling assembly to control heating and cooling, and a heat exchanger connected to the cooling line such that the coolant is circulated therein, selectively uses the waste heat generated from the electric devices according to modes to vary the temperature of the coolant, and is connected to the refrigerant line of the air conditioning assembly such that an inflow refrigerant exchanges heat with the coolant.

Provided is a direct current air temperature adjusting device based on composite graphene film auxiliary heat. An outdoor machine unit only has a one-way refrigerating mode; an air conditioner outdoormachine communicates with an indoor machine unit through a refrigerant pipe; according to the air conditioner indoor machine unit, the upper end of a machine shell of the air conditioner indoor machine unit is provided with an air inlet, and the two ends of the machine shell of the air conditioner indoor machine unit are provided with clamping pieces to be fixedly connected with an evaporator; the evaporator is located on the lower portion of the air inlet; an inlet and an outlet of the refrigerant pipe of the evaporator are connected with an outdoor machine condenser; a copper pipe of the evaporator is provided with a composite graphene heating film; the lower portion of the evaporator is equipped with a cross flow fan which is installed in an air duct; the inner wall of the air duct isprovided with a composite graphene heating film; blades of fan blades of the cross flow fan are equipped with composite graphene heating films; and during heating of an air conditioner, a composite graphene heating film circuit is connected, the composite graphene heating films start heating, and a fan motor feeds hot air in the air duct into a room due to the fact that the motor drives the fan blades to rotate.

The present invention is to provide a heating substrate equipped with a conductive thin film and electrodes. The heating substrate includes a transparent substrate, a plurality of electrodes formed on a first face of the substrate, and a conductive thin film formed on the first face of the substrate and including a plurality of regions electrically connected each other in parallel by the plurality of electrodes. Furthermore, a method of manufacturing a heating substrate equipped with a conductive thin film and electrodes according to an exemplary embodiment of the present invention includes forming the conductive thin film on a substrate, forming main electrodes so as to extend on the substrate while being adjacent to edges of the conductive thin film, and forming branched electrodes that are extended from the conductive thin film across one side of the conductive thin film while coming in contact with the conductive thin film.

The invention discloses an air conditioner heating operation control method which comprises the following steps: an air conditioner operates in a heating mode, and an indoor temperature is acquired, if the indoor temperature is not greater than a first indoor temperature threshold, fuzzy control is carried out; and when the fuzzy control is carried out, an indoor fan of the air conditioner is controlled to operate at a highest speed. The fuzzy control is specifically carried out as follows: according to a temperature difference between the indoor temperature and a set indoor target temperature, room temperature PID operation is carried out and first target frequency is obtained, a coil tube temperature of an indoor heat exchanger is acquired, if the coil tube temperature is greater than a set coil tube target temperature, the first target frequency is determined as indoor unit frequency, if the coil tube temperature is not greater than the set coil tube target temperature, current operating frequency of a compressor is increased and second target frequency is obtained, the higher value in the first target frequency and the second target frequency is determined as the indoor unit frequency, and the compressor of the air conditioner is controlled. With the application of the air conditioner heating operation control method, the problem that the heating is uncomfortable due to the fact that the heating of an existing air conditioner is slowly can be solved.

The invention discloses a low-voltage flexible electrothermal film and a preparation method therefor. The electrothermal film comprises an insulating base material, an electrode layer, a conductive heating layer, a heat conducting and infrared radiation layer and an externally connected wire; each layer is formed by printing, and drying is completed in a drying channel; and the electrothermal filmis applicable to electrothermal clothes. The low-voltage flexible electrothermal film has the advantages as follows: large-area heating at a low voltage (3.7V) can be realized; the heat conducting and radiation layer is adopted to replace an insulation protection layer above the existing heating layer; the layer also has the insulation protection, heat conducting and infrared radiation functions;by adopting the multi-point externally connected wire mode to replace the existing method for improving conductivity of an external electrode, basically same voltages in each point on the external electrode is realized, so that cost is lowered, and meanwhile, electrode flexibility and stability are reinforced; and a mature printing mode is adopted to manufacture the electrothermal film to replacethe existing troublesome, time-consuming and strict working procedure, so that the technical threshold for manufacturing the low-voltage flexible electrothermal film is lowered, thereby facilitatinglarge-scale industrial production of the electrothermal film.

A multi-unit air conditioner and a method for controlling the same are disclosed which are capable of preventing continuous introduction of a refrigerant into indoor units in an OFF state where the indoor units can be independently powered on or off, thereby preventing a degradation in the cooling and heating efficiencies. The air conditioner includes a plurality of indoor units each including a power controller adapted to independently power on or off an associated one of the indoor units, an outdoor unit connected with the indoor units, the outdoor unit including a microcomputer for controlling an operation of the outdoor unit, and enabling the outdoor unit to communicate with the indoor units, and a controller for determining whether each of the indoor units is in a normal operation state or in a non-operation state, and controlling an operation of a distributor in accordance with the result of the determination.

The invention provides a heat pump type hot water supply apparatus, comprising a cascade circulation unit, comprising: a cascade circulation heat exchanger making a first coolant of a low temperature refrigeration circulation perform heat exchange with a second coolant of a high temperature refrigeration circulation, the water coolant heat exchanger heating water during condensation of the secondcoolant of the high temperature refrigeration circulation is connected with a position requiring heat supply and a water circulating path. The heat pump type hot water supply apparatus comprises a coolant injection path and a gaseous coolant adjustment valve. The coolant injection path may be split between a cascade heat exchanger and an evaporator of a low temperature refrigeration cycle to inject coolant into a low pressure side compressor, or between a water coolant heat exchanger and a cascade heat exchanger to inject coolant into a high pressure side compressor of a high temperature refrigeration cycle. The gaseous coolant adjustment valve may be provided in the coolant injection path and is adjusted to correspond to a load of a destination. Via the above structure, high temperature water can be effectively supplied to places requiring hot water supply, reduction of heating efficiency due to outdoor low temperature in cold zones can also be effectively prevented.

The invention discloses a heating control method, a heating control device and an air conditioner. The method comprises the following steps of: enabling the air conditioner to be in heating operation, obtaining an indoor temperature, comparing the indoor temperature with a first indoor temperature threshold value; and performing dual PID control if the indoor temperature is not greater than the first indoor temperature threshold value: calculating door temperature difference between the indoor temperature and a set indoor target temperature, and performing room-temperature PID operation according to the indoor temperature difference, thereby obtaining first target frequency; calculating coiled tube temperature difference between a coiled tube temperature and a set coiled tube target temperature, and performing coiled tube temperature PID operation according to the coiled tube temperature difference, thereby obtaining second target frequency; selecting a greater one of the first target frequency and the second target frequency as frequency of an indoor unit, and controlling a compressor of the air conditioner; and controlling an indoor fan of the air conditioner to operate at a highest air speed while entering dual PID control. The heating control method is applied, so that the problem that heating is uncomfortable as an existing air conditioner is slow in heating can be solved.

The invention discloses a heat pump air conditioning system for an electric vehicle. The system comprises a heat pump circulation system and an in-vehicle air conditioning system; the heat pump circulation system comprises a compressor, an external heat exchanger, an air-liquid separating device with back heat, an expansion valve for heating, an expansion valve for refrigerating, a refrigerating heat regenerator, a high-pressure three-way switching valve, a low-pressure three-way switching valve, a compressor intercooler, an evaporator and a condenser; the in-vehicle air conditioning system comprises an air supply duct for supplying air into the vehicle, a fresh air inlet and a return air inlet are formed in the inlet of the air supply duct, and fresh and return air adjusting valves are arranged at the fresh air inlet and the return air inlet; a fan is arranged in the air supply duct. The compressor is a double stage compressor connected with an the intercooler, a spraying nozzle is arranged on the compressor intercooler, condensed water generated by using the in-vehicle evaporator when refrigerating is conducted is evaporated through the spraying nozzle, and the performance of theheat pump air conditioning system is improved.

The present invention is a geothermal exchange process to deliver water, in a closed loop ground to water system, at temperatures approaching that of ground water. Such water temperatures were heretofore only achievable with ground water systems. Optimum energy saving and performance of ground coupled heat pumps are directly linked to heat exchange between a circulating water loop and ground temperature. This invention allows for the optimization of energy and performance. The efficiency of heat pumps diminishes with descending outside air temperatures. This invention allows for the manipulation of entry water temperatures to stem the problem of diminishing efficiencies. The water system makes use of a uniquely designed geothermal exchange module with increased conductivity to maximize heat transfer into the water.

A refrigeration cycle device includes a flow channel coupling member which constitutes at least one of a branching portion and a joining portion of a third refrigerant passage and a branching portion and a joining portion of a bypass passage. One of three refrigerant ports of the flow channel coupling member is directly connected to one of two refrigerant ports of a first switching device or a second switching device, and a sealing mechanism preventing a refrigerant leakage is provided in a connecting portion between the refrigerant port of the flow channel coupling member and the refrigerant port of the first switching device or the second switching device. The flow channel coupling member is fixed to one of the switching devices at a position different from a position of the sealing mechanism.

The invention discloses a heat pump type exhaust air heat recovery fresh air conditioning unit applicable to severe cold areas. The heat pump type exhaust air heat recovery fresh air conditioning unit applicable to severe cold areas comprises a supply air heat exchanger, an exhaust air heat exchanger, a compressor, a four-way reversing valve, a throttling gear, a refrigerant connection pipe, a fresh air port, a first three-way reversing valve, a second three-way reversing valve, an air supply fan, an air supply outlet, an air return inlet, an air exhaust fan, a defrosting electric heater, an air-air plate heat exchanger, an exhaust outlet and an air flue. A traditional heat pump type exhaust air heat recovery fresh air conditioning unit is improved, outdoor low-temperature air is deeply preheated through outlet air (larger than 0 DEG C) of the exhaust air heat exchanger, the air inlet temperature of the supply air heat exchanger is increased to be more than minus 10 DEG C, the load of a heat pump system is reduced, the exhaust air heat exchanger is prevented from frosting, and the application range of the heat pump type exhaust air heat recovery fresh air conditioning unit can be enlarged greatly to the minus 30 DEG C outdoor environment temperature.

The invention discloses a transcritical carbon dioxide electric vehicle thermal management system and a control method. The transcritical carbon dioxide electric vehicle thermal management system comprises a compressor, a gas cooler, a first electronic expansion valve, a liquid storage device, a second electronic expansion valve and an evaporator. The compressor is a 3 + 1 cylinder air supplementing piston type compressor, an air suction port a of the compressor is connected with three main air cylinders for main circulation compression, an air suction port b of the compressor is connected with one auxiliary air cylinder for air supplementing compression, two paths of refrigerants are mixed after compression is completed, and the compression frequencies of the two paths of refrigerants areconsistent; an outlet of the compressor is connected with the liquid accumulator through the gas cooler and the first electronic expansion valve; a gas outlet of the liquid accumulator is connected with a gas suction port b of the compressor; and a liquid outlet of the liquid storage device is connected with an air suction port a of the compressor through the second electronic expansion valve andthe evaporator. The problem that the transcritical carbon dioxide refrigeration performance is insufficient is solved, the progress that the green refrigerant CO2 is put into practical application ispromoted, and great contribution is made to environmental protection and energy conservation.

The invention discloses a power supply quantity dual-stage optimization scheduling method based on heat load regulation. The method includes the steps: S1 day-ahead scheduling stage: forecasting next-day load and wind power output and acquiring a heating load scheduling plan of next-day regulated wind power heating load according to heating load needed by a target supply area; S2 real-time scheduling stage: heating the target supply area according to the heating load scheduling plan, and regulating heat load within a preset range in real time to optimize scheduling of the heat load. The methodis simple to implement, heating can be scheduled based on heat load regulation, the regulation capacity and the heating performance of a thermoelectric unit are improved, heating use rate is increased, and environmental pollution is reduced.

The invention provides a heat accumulation component and an air conditioner. The heat accumulation component comprises a heat accumulator and at least one electric heating element, wherein the heat accumulator is provided with at least one fin and a cavity; the cavity is used for accommodating a heat accumulation material; the at least one electric heating element is arranged on the heat accumulator; the at least one fin is positioned at the periphery of the at least one electric heating element and is perpendicular to a cross section of the at least one electric heating element. According to the heat accumulation component provided by the invention, the condition that the heat accumulation material flows to be dispersed and further is liable to ice due to the parallelism of the fins and the cross sections of the electric heating elements is avoided; meanwhile, the phenomenon that a heat radiating effect is affected by fin deformation due to the fact that the heat accumulation material is iced and then expands is avoided, a refrigerant is effectively enabled to be uniform in heating and is subjected to sufficient heat exchange, further a good and stable defrosting effect and a heating effect are guaranteed, and the use experience of a user is improved; meanwhile, the service life of the fins is prolonged, the integral quality of the heat accumulation component is improved, and the use satisfaction degree of the user is improved.

The invention belongs to the technical field of air conditioning and discloses an air conditioning system with adjustable refrigerant quantity. The air conditioning system with the adjustable refrigerant quantity comprises a refrigerant storage unit communicating with a refrigerant circulating pipeline of the air conditioning system; and the refrigerant storage unit is used for adding refrigerant into the refrigerant circulating pipeline or recycling part of refrigerant in the refrigerant circulating pipeline to remain stability of the refrigeration effect or the heating effect of the air conditioning system in the operating process of the air conditioning system. According to the air conditioning system with the adjustable refrigerant quantity, the refrigerant storage unit communicates with the refrigerant circulating pipeline of an original air conditioning system, so that the total refrigerant quantity in the refrigerant circulating pipeline can be adjusted at any time, and the refrigeration effect or the heating effect of the air conditioning system remains stable; a refrigerant storage pot communicates with the refrigerant circulating pipeline through two branches and conducts operation of refrigerant supplementing and refrigerant recycling through the character in the process of refrigerant flowing, and no extra driving unit needs to be arranged; and a capillary pipe can play a role in buffering, reduces the impact effect of high-pressure refrigerant on the refrigerant storage pot and relative pipelines, and protects the pipeline.

The invention discloses a transcritical carbon dioxide electric passenger car air conditioning system and a control method. According to the system, an outlet of a compressor is connected with a first port of a four-way reversing valve, a second port of the four-way reversing valve is connected with one end of an outdoor heat exchanger, and the other end of the outdoor heat exchanger is connected with an inlet of an expansion machine through a second channel of a heat regenerator; an outlet of the expansion machine is connected with a first port of the first three-way electromagnetic valve; a second port of the first three-way electromagnetic valve is connected with a second port of the second three-way electromagnetic valve, a first port of the second three-way electromagnetic valve is connected with a third port of the four-way reversing valve through the indoor heat exchanger, a fourth port of the four-way reversing valve is connected with an inlet of the gas-liquid separator, and an outlet of the gas-liquid separator is connected with an inlet of the compressor through a first channel of the heat regenerator. A natural working medium CO2 is adopted as a refrigerant, and the technical problem that an existing halogenated hydrocarbon refrigerant pollutes the environment is solved.

A low-temperature cold start method of a fuel cell is used for preventing the water generated during the work of the fuel cell from freezing during low-temperature cold start, and comprises the steps of dividing a low-temperature cold start process into a start preparation process, a low-temperature activation process and a temperature rise start process. According to the present invention, in the low-temperature activation process, a fuel cell stack starts to operate under the condition that a water pump does not operate, and the fuel cell stack is activated, so that the adverse consequence that the temperature of the fuel cell stack is too low due to heat exchange with a cooling water circulation loop under the condition that the temperature of the fuel cell stack does not rise to a sufficient temperature, and finally the fuel cell stack is unsuccessfully started, is avoided; after the low-temperature activation process is ended, the speed of the water pump is gradually controlled, so that the fuel cell stack still has the stable power output capability at low temperature even if the fuel cell stack exchanges heat with the cooling water circulation loop in the subsequent temperature rise starting process, the the low-temperature cold start can be completed while the output power is stabilized in the heating start process, the energy-saving effect is good, and the heating performance is stable.

A heat pump system for a vehicle which uses an evaporator of an air-conditioning case for common use in an air-conditioning mode and in a heat pump mode for cooling and heating so as to reduce weight and manufacturing costs. The heat pump system can be applied without any change in structure of the air-conditioning case, and can be operated even at low temperature without any influence of outdoor temperature because the heat pump system uses waste heat of an engine so as to enhance fuel efficiency and increase heating performance and efficiency.

The invention provides an ice source heat pump system. The ice source heat pump system comprises a compressor, a condenser, a regenerator, a liquid storage device, a filter, a throttle device, an evaporator and a gas-liquid separator, wherein an ice source air interchanger is connected to the condenser and the evaporator by virtue of a refrigeration and heating conversion device, a first inlet of the regenerator is connected with an outlet of the condenser, a first outlet of the regenerator is connected with an inlet of the liquid storage device, a second inlet of the regenerator is connected with an outlet of the gas-liquid separator, a second outlet of the regenerator is connected with an inlet of the compressor, and an enthalpy adding expansion valve is arranged between an outlet of the condenser and the inlet of the compressor. An ice source aqueous solution which cannot freeze at 30 DEG C below zero is added to the ice source air interchanger, so that the system can be prevented from being frosted when heat exchange is performed in heating conditions, and the heating efficiency of the system is stable; additionally, the ice source heat pump system has the advantages of large energy saving amplitude, wide application range, no limit to geographic positions or weather conditions and good energy saving transformation versatility and is applicable to various places at 30 DEG C below zero to 50 DEG C.

The invention discloses a heat pump air conditioning system provided with a flat tube plate-fin type heat-source tower and a working method of the system. The system comprises the oval flat tube plate-fin type heat-source tower, an air conditioner, a first water pump, an evaporator, a reversing valve, a first check valve, a second water pump and a second check valve; the oval flat tube plate-fin type heat-source tower comprises a tower body, and a spraying device, an oval flat tube plate-fin type heat exchanger and a solution tank are sequentially arranged in the tower body from top to bottomsequentially. According to the air conditioning system and the working method thereof, the heat exchange performance is excellent both in winter and summer and frosting of the evaporator is avoided.