358 results about "Heat exchanger temperature" patented technology

The invention discloses an automatic cleaning treatment method and an automatic cleaning treatment system of an air-conditioning heat exchanger. The automatic cleaning treatment method comprises the following steps: after an air-conditioner is started, judging whether the starting condition of automatic cleaning treatment of the air-conditioning heat exchanger is met; if yes, starting the refrigerating mode of the air-conditioner to enable surface of the heat exchanger to frost, and judging whether frosting is finished; after the frosting is finished, controlling the refrigerating mode of the air-conditioner to turn off, starting the air supply mode, then, starting an indoor draught fan to enable frost on the surface of the indoor heat exchanger to melt to water, and judging whether defrosting is finished; and after the defrosting is finished, controlling the heating mode of the air-conditioner to start, drying the heat exchanger, and ending cleaning. According to the invention, the inner side heat exchanger frosts after the temperature is rapidly decreased and covers and wraps dust and germs during frosting, the dust and germs on the heat exchangers are rapidly discharged along with water flow of a large quantity of defrosting water generated during the defrosting process, and automatic cleaning is realized through redrying treatment.

The invention relates to a control method of a variable frequency air conditioner. The variable frequency air conditioner comprises a compressor, a four-way change valve, an outdoor heat exchanger, an outdoor fan, a throttling element, an indoor heat exchanger and an indoor fan, wherein an exhaust outlet of the compressor is provided with a compressor exhaust temperature sensor; an outdoor environment temperature sensor and an outdoor heat exchanger temperature sensor are arranged on the outdoor heat exchanger; and an indoor environment temperature sensor and an indoor heat exchanger temperature sensor are arranged on the indoor heat exchanger. When more than one temperature sensor breaks down, the variable frequency air conditioner can be operated according to the following control method of defaulting the detection temperature of the indoor environment temperature sensor to be 26 DEG C under a refrigeration, dehumidification or ventilation mode when the indoor environment temperature sensor breaks down. The invention can ensure that the air conditioner can be still normally used when partial sensors break down so as to ensure that a consumer furthest uses the variable frequency air conditioner with faults and reduce troubles caused by the faults of the air conditioner to the consumer.

The invention discloses a method for controlling defrosting of a heat pump air-conditioner, comprising the following steps: 1) dividing outdoor environment temperatures into a plurality of stages; 2)setting a plurality of outdoor heat exchanger temperature ranges corresponding to each outdoor environment temperature stage; wherein each temperature range is corresponding to a predetermined cumulative time standard length; 3) calculating the total of the time when the outdoor heat exchanger temperature is within the range of each outdoor heat exchanger temperature; 4) calculating the quotient of the time calculated in step 3) and the corresponding cumulative time standard length set in step 2); 5) calculating the sum of the quotient of the total of the time when the outdoor heat exchanger temperature is within the range of each outdoor heat exchanger temperature calculated in step 3) and the corresponding cumulative time standard length, to obtain accumulated calculation coefficient; and 6)when the accumulated calculation coefficient is more than or equal to 1, starting the defrosting operation. The inventive method for controlling defrosting of the heat pump air-conditioner is used for solving the technical problem that the air-conditioner defrosting starting time is not accurate in prior art.

A method for controlling a device temperature measures a parameter related to device power consumption and utilizes the parameter to control the device temperature. This can be achieved with a system including a heat exchanger, a power monitor, and a circuit which controls the temperature setting of the heat exchanger. The circuit uses as inputs the power level, heat exchanger temperature, and set point. The system thus eliminates the need for temperature sensing devices in or connected to a chip, responds to the temperature of the device and not the package, can be used for high volume chip manufacturing, does not require significant surface area of a device for temperature sensing, and eliminates the need for chip power profiles. Significantly, the system allows a set point to be maintained with minimal overshoot or undershoot.

PCT No. PCT/EP96/05514 Sec. 371 Date Nov. 13, 1998 Sec. 102(e) Date Nov. 13, 1998 PCT Filed Dec. 10, 1996 PCT Pub. No. WO90/21758 PCT Pub. Date Jun. 19, 1997A process and device for the standardised continuous production of polyamide 6, polyamide 6.6 and/or copolyamides from e-caprolactam and/or adipic acidic hexamethylenediamine or adipic acid and hexamethylenediamine uses a combination of known specific processes to design a polymerisation reactor in which product with sufficiently high quality can be produced with the most efficient possible use of the energy applied and in such a way that the initial substances can be used alternately in the individual processing stages: pre-heating of the initial products using a common heat exchanger to 190-300 DEG C.; polymerisation of the initial products in a pressure stage with or without elimination of water and product recycling at 150-280 DEG C. and a pressure of <20 bar, dewatering of the polymer melt in a one to five turn coil under slow pressure reduction; and final condensation of the melt in at least one common vertical reactor at temperatures of between 210 and 285 DEG C.

A recuperating four-stroke internal combustion engine obtains improves Carnot efficiency by use of a new and novel cylinder head which captures thermal energy normally thrown away in the exhaust and re-introduces it to the working cycle. This result, long sought by others, has been achieved by incorporating within the head a compact internal recuperative heat exchanger in series with a combustion chamber or pre-chamber. A recuperator-protecting valve segregates the recuperator from hot combustion gases until the gases reach maximum expansion in the cylinder. Recuperators of both common-duct and seperated-duct design are described, the separated duct recuperator permitting higher recuperator temperature and increased efficiency and a reduction in the number of valves necessary to control gas flow. A preferred embodiment employs four valves per cylinder unit, a separated duct recuperator, and an insulating liner that surrounds both the combustion chamber and the recuperator. A similar prototype recuperative engine has demonstrated that recuperation can reduce exhaust temperature as much as 600° Rankine below that attainable in an equivalent Otto Cycle engine.

The invention discloses an air conditioner defrosting control method and application thereof. When the air conditioner is in heating operation mode, a temperature sensor on an indoor heat exchanger is utilized to monitor the temperature of the indoor heat exchanger, a main controller receives the detection data and outputs an instruction after analysis, and the defrosting program is controlled to be started. The invention adopts the temperature sensor to monitor the temperature of the indoor heat exchanger and combines the correspondence of the indoor heat exchanger temperature with the outdoor heat exchanger temperature and frosting amount, defrosting start moment can be accurately controlled, defrosting at appropriate moment is realized, and heating operation efficiency is improved, thus putting an end to the condition that the air conditioner incorrectly starts defrosting action, simplifying the circuit structure, reducing production cost and saving production time.

The invention discloses a method for controlling intelligent defrosting of an air conditioner. The method comprises the step of detecting indoor environment temperature T1, temperature T2 of an indoor heat exchanger and continuous operation time M of a compressor. When the temperature T2 of the indoor heat exchanger is less than setting temperature T4, a temperature difference delta T between the temperature T2 of the indoor heat exchanger and the indoor environment temperature T1 is less than setting temperature T3, the continuous operation time M of the compressor is greater than or equal to setting time M1, and a drop-out value of the temperature difference delta T is greater than or equal to a setting value TS1 or time t used every time when the temperature difference delta T drops by a setting value TS2 is in a range of setting time, the air conditioner operates to defrost. Due to the fact that the relationship of the temperature of the indoor heat exchanger and the indoor environment temperature is detected, the frosting conditions of an outdoor heat exchanger are judged so that whether defrosting is carried out or not can be selected, accordingly, unnecessary defrosting operation is reduced and heating capacity of the air conditioner is increased.

The invention discloses a method for detecting variable frequency air conditioner coolant leakage based on speed range parameters; the method comprises the steps of determining whether a detection program uses a refrigerating or heating mode according to indoor and outdoor ambient temperatures; measuring electrical parameters and temperature parameter of an air conditioner system within a preset speed range, and measuring compressor voltage and current parameters, indoor and outdoor ambient temperatures, and indoor and outdoor heat exchanger temperatures when a compressor runs stably at each frequency node; acquiring a compressor power curve within the preset speed range; acquiring an indoor heat exchanger temperature change curve within the preset speed range; judging whether the compressor runs normally or not; if yes, judging effectiveness of the measured temperature change curve; judging whether coolant leaks or not. By measuring, within a preset speed range, the indoor heat exchanger temperature parameter of an air conditioner system and judging whether coolant leaks or not according to temperature change law, detection accuracy is greatly improved.

The invention relates to the technical field of control over air conditioners, in particular to a control method and control device for the air conditioners. The control method for the air conditioners comprises the steps: setting an initial rotary speed of an outdoor fan according to an outdoor environmental temperature when the air conditioner enters a heating mode; obtaining the temperature of an indoor heat exchanger and comparing with a first preset temperature value and a second preset temperature value; if the temperature of the indoor heat exchanger is larger than the first preset temperature value, reducing the rotary speed of the outdoor fan; if the temperature of the indoor heat exchanger is not larger than the first preset temperature value and not smaller than the second preset temperature value, then keeping the current rotary speed of the outdoor fan; and if the temperature of the indoor heat exchanger is smaller than the second preset temperature value, then increasing the rotary speed of the outdoor fan. The problem that the rotary speed of the fan cannot be automatically adjusted according to different air conditioner operation environments is solved, the fan can save energy when operating at a relatively lower rotary speed, the noise of an outdoor unit is also reduced, an air conditioner system is more stable in operation, shutdown and starting up times of the outdoor fan are reduced, and the use comfortableness of a user is improved.

The invention discloses a control method for calculating exhaust temperature of a compressor of an air conditioner. Temperature sensors are respectively mounted on an outdoor heat exchanger and an indoor heat exchanger and are used for detecting the outdoor heat exchanger temperature Te and the indoor heat exchange temperature Tc; the method for calculating the exhaust temperature of the compressor comprises the specific steps of: A, calculating a temperature correction value Tc' of the indoor heat exchanger according to the detected indoor heat exchanger temperature Tc and the operation frequency fi of a current compressor, wherein the Tc' is equal to Tc plus fi/a plus b, a is a frequency correction coefficient of the compressor and ranges from 5-40Hz and b is a temperature correction value of the indoor heat exchanger and ranges from -5DEG C-10DEG C; and B, calculating a temperature correction value Te' of the outdoor heat exchanger according to the detected temperature Te of the outdoor heat exchanger, wherein the Te' is equal to Te plus c. The control method has the characteristics of flexibility in operation, low manufacturing cost and wide application range.

The invention discloses an air conditioning defrost method and device. The air conditioning defrost method comprises the following steps of detecting outdoor environment temperature; detecting heat exchanger temperature at an outdoor side of an air conditioner; selecting a defrost mode of the air conditioner according to the outdoor environment temperature and the heat exchanger temperature, wherein the defrost mode comprises multiple defrost modes preset according to conditions met by the outdoor environment temperature and the heat exchanger temperature; controlling the air conditioner to defrost according to the selected defrost mode. Through the air conditioning defrost method and device provided by the invention, the problem that the defrost mode cannot be adjusted according to the frost condition due to a single air conditioning defrost mode in the prior art is solved.

The invention provides a refrigerant leakage detecting method and system and an air conditioner. The method includes the steps that the first indoor air inlet temperature of an inlet of an indoor heat exchanger of the air conditioner and the first indoor heat exchanger temperature of the indoor heat exchanger are detected after a compressor of the air conditioner runs for a first set period of time; when the first difference between the first indoor air inlet temperature and the first indoor heat exchanger temperature is smaller than or equal to a first preset threshold, the second indoor air inlet temperature of the inlet of the indoor heat exchanger and the second indoor heat exchanger temperature of the indoor heat exchanger are detected after the compressor runs for a second preset period of time; when the second difference between the second indoor air inlet temperature and the second indoor heat exchanger temperature is smaller than or equal to the first preset threshold, whether variation of the second difference relative to the first difference is smaller than or equal to a second preset threshold or not is judged, and if yes, refrigerant leakage is judged to happen to the air conditioner. According to the technical scheme, refrigerant leakage of the air conditioner can be accurately detected in time.

An air conditioner is provided. A compressor compresses refrigerant. An indoor heat exchanger performs heat exchange between the refrigerant and indoor air. An expansion device decompresses the refrigerant. An outdoor heat exchanger performs heat exchange between the refrigerant and outdoor air. Sensors sense temperature of the outdoor heat exchanger, indoor temperature and outdoor temperature. Aheater generates heat variably according to the outdoor temperature and the outdoor heat exchanger temperature. A controller determines quantity of frost on the outdoor heat exchanger by comparing a preset reference temperature with a temperature difference between the outdoor heat exchanger and the outdoor heat exchanger temperature, and controls output of the heater according to the determined frost quantity. Accordingly, frost quantity is determined according to the indoor and outdoor temperatures and the outdoor heat exchanger temperature, and heat quantity of the induction heater is accordingly varied. Therefore, power consumption can be reduced.

The invention discloses an air conditioner defrosting control method, an air conditioner and a computer-readable memory medium. The air conditioner defrosting control method comprises the following steps: acquiring the relative humidity of the current outdoor environment, the temperature of the current outdoor environment and the temperature of a current outdoor heat exchanger; detecting the continuous operating time of the air conditioner under the relative humidity condition in the current outdoor environment; according to the relative humidity of the current outdoor environment, the temperature of the current outdoor environment, the temperature of the current outdoor heat exchanger and the continuous operating time, judging whether the outdoor heat exchanger meets the preset defrosting condition or not; if the outdoor heat exchanger meets the preset frosting condition, performing defrosting operation on the outdoor heat exchanger. According to the air conditioner defrosting control method, the air conditioner and the computer-readable memory medium, reasonable defrosting control over the air conditioner is realized.

A method and a device for collecting a condensed water to clean an air conditioner based on rotation speed regulation of a compressor are disclosed. A heat exchanger in the air conditioner is used for condensing water vapor inside the air conditioner into a liquid water, and thereby cleaning the dirt adhered on the surface of the heat exchanger. The step of condensing the water vapor into the liquid water comprises: determining a surface temperature for condensation of the heat exchanger as an expected temperature, on the basis of a current environment temperature and a current environment humidity of the air conditioner; regulating and maintaining the temperature of the heat exchanger at the expected temperature by regulating the rotation speed of the compressor in the air conditioner. An optimal temperature of the heat exchanger in the current environment is determined by analyzing the influence of the environment temperature and the environment humidity to the dew point, thereby acquiring enough condensed water for cleaning the dirt on the surface of the heat exchanger. When the actual temperature of the heat exchanger is unequal to the expected temperature, the rotation speed of the compressor is regulated to rise up or lower down the temperature of the heat exchanger, accordingly maintaining the temperature of the heat exchanger at the determined optimal temperature, and thereby achieving the automatic cleaning and self-adaptive regulation of the heat exchanger, and ensuring the cleaning effect of the heat exchanger.

The invention discloses a control method and device of an air conditioner, a storage medium and an air conditioner. The method comprises acquisition parameters collected by a data acquisition sensor carried by the air conditioner; and the acquisition parameters comprise at least one of the windshield target, the air guide plate position, the indoor heat exchanger temperature, the indoor relative humidity, the indoor temperature, the air outlet temperature, an air inlet temperature, an air outlet temperature, an outer machine complete machine current, an inner machine complete machine current and a running time; according to the collection parameters, the operation parameters of the air conditioner are determined; the operation parameters, which comprises at least one of the heat exchange,the complete machine power, the energy efficiency and the overall power consumption. According to the scheme, the power consumption of the air conditioner in the prior art can be solved, the problem that the operation difficulty is large due to the fact that more temperature sensors and pressure sensors which are not arranged in the air conditioner need to be additionally arranged in the calculation process of refrigerating capacity and energy efficiency, so that the effect of reducing the operation difficulty is achieved.

The invention provides an air conditioner control method and device, a storage medium and an air conditioner. The air conditioner control method comprises the steps that after the air conditioner starts a heating mode, the air conditioner enters into a preset control mode; under the preset control mode, the current indoor environment temperature and the current indoor heat exchanger temperature ofthe air conditioner are obtained; and the operation frequency of a compressor and/or the opening degree of a throttling device of the air conditioner are/is adjusted according to the obtained currentindoor environment temperature and the current indoor heat exchanger temperature. According to the air conditioner control method, the serious layering phenomenon of hot and cold air in the staring initial stage of the air conditioner heating mode can be weakened, and the uniformity of overall temperature distribution of a room is improved.

The invention provides a method and a device for collecting condensed water to clean an air conditioner on the basis of wind speed regulation. A heat exchanger in the air conditioner is used for condensing water vapor in the air conditioner into liquid state water; dirt attached on the surface of the heat exchanger is removed; the surface temperature, used for condensing, of the heat exchanger is determined according to the current environment temperature and the environment humidity of the air conditioner and is used as the expected temperature; through regulating the rotating speed of a fan in the air conditioner, the temperature of the heat exchanger is regulated and is maintained at the expected temperature. The optimum temperature of the heat exchanger in the current environment is determined through analyzing the influence of the environment temperature and environment humidity on a dew point, so that the sufficient quantity of condensing water can be obtained to clear the dust and dirt on the surface of the heat exchanger. When the actual temperature of the heat exchanger is different from the optimum temperature, the regulation on the rotating speed of the fan is utilized for realizing the temperature rise or reduction of the heat exchanger; the temperature of the heat exchanger is maintained at the determined optimum temperature; the automatic cleaning and the self-adaptation cleaning of the heat exchanger are realized; in addition, the cleaning effect of the heat exchanger is ensured.

The present invention provides a multi-chamber air conditioner which can make a plurality of indoor units (2n) are respectively operated or stopped to operate, and the mulit-chamber air conditioner executes the following oil-return controlling steps: first detecting out the heat exchanger temperature Tc-n of each indoor unit (2n) no matter whether the air conditioner is operated or not operated in the heating operation; then calculating the highest temperature Tc-max of the heat exchanger in the heat exchangers which is operating the indoor units and the largest heat exchanger temperature difference delta Tc-max in the heat exchanger temperature difference delta Tc-n between the heat exchanger temperature of each stopped indoor unit; adjusting the opening of the indoor expansion valve of the prescribed stopped indoor unit and executing oil-return controlling at the condition that the largest heat exchanger temperature difference delta Tc-max is larger than or equal to the prescribed threshold value delta-S.

The invention provides a control method and a device of an air conditioner and the air conditioner. The method comprises the following steps: a first control policy and/or a second control policy are/is carried out; the step of carrying out the first control policy comprises the following substeps: a first target frequency of a compressor is determined; a frequency shielding interval of the compressor is determined according to a rotating speed and a blade number of an outdoor fan; and when the first target frequency is in the frequency shielding interval, the operation of the compressor is controlled according to a set temperature of the air conditioner, an indoor environment temperature and the frequency shielding interval; and/or, the step of carrying out the second control policy comprises the following substeps: a first target rotating speed of the outdoor fan is determined; a rotating speed shielding interval of the outdoor fan is determined according to an operation frequency ofthe compressor and the blade number of the outdoor fan; and when the first target rotating speed is in the rotating speed shielding interval, the operation of the outdoor fan is controlled accordingto a temperature of an outdoor heat exchanger, an outdoor environment temperature and the rotating speed shielding interval. The method can reduce the beat vibration of the compressor and the outdoorfan.