97 results about "Heat exchanger temperature" patented technology

The refrigerating system comprises a compressor, an evaporative condenser, a gas-liquid separator, a heat regenerator, an evaporator, a heat recoverer, an energy storage device, a terrace heat exchanger, an oil separator, an oil cooler, a water pump, a temperature control valve, an electronic expansion valve, a three-way valve, a control device, a temperature sensor and a pressure sensor. The control device collects signals of compressor outlet and inlet pressure sensors and temperature sensors, evaporator outlet pressure sensors and temperature sensors, an oil return temperature sensor and a floor heat exchanger temperature sensor. Condensing pressure is adjusted by controlling starting and stopping of a condenser side fan and a water pump, and the opening degree of the three-way valve is controlled to enable the oil return temperature to be within a safe range. The evaporation temperature is maintained by adjusting the opening degree of an evaporator inlet electronic expansion valve. By monitoring the terrace temperature in the refrigeration house, the electromagnetic valve is controlled to adjust the refrigerant flow in the terrace heat exchanger to maintain the outlet temperature, and the energy storage device is intermittently put into the refrigeration house to improve the system energy efficiency.

The control method comprises the steps that the rotating speed of a high-temperature-stage inverter compressor is mainly comprehensively determined by the high-temperature-stage exhaust temperature, the high-temperature-stage condenser temperature, the high-temperature-side outlet temperature of an intermediate heat exchanger and the high-temperature-stage return air temperature; through dynamic adjustment of the first fuzzy PID controller, the working condition and energy efficiency of the high-pressure side of the system are optimized; the rotating speed of the low-temperature-stage frequency conversion compressor is mainly comprehensively determined by the temperature in the box, the real-time rotating speed of the high-temperature-stage compressor, the low-temperature-stage exhaust temperature, the temperature of the intermediate heat exchanger and the low-temperature-stage return air temperature, and the rotating speed is dynamically adjusted through the second fuzzy PID controller so as to ensure that the temperature in the box is accurate and stable and is matched with the high-temperature-stage capacity in real time. Through cooperative control of the parameter groups, the problems of low efficiency and unstable operation caused by mismatching of two-stage capabilities of the cascade system are solved, and efficient, stable and reliable operation of the system under all working conditions is realized.

The invention relates to the technical field of water treatment devices, and discloses a control method of a water treatment device, the water treatment device and a medium. The method comprises the steps that a controller detects the temperature of a heat exchanger through a first temperature sensor, and when the temperature is lower than a heat preservation threshold value, a driving pump and a heating device are started; hot water flows in the heat preservation circulation loop until the heat exchanger reaches the set temperature. Through double-pump division of labor, a heat preservation circulation task is undertaken by the driving pump, the running time of the circulating pump is greatly shortened, the service life of the circulating pump is remarkably prolonged, meanwhile, the instant heating effect is guaranteed, and the system reliability is improved.

In a refrigerant circuit in which an indoor unit is connected to an outdoor unit by a refrigerant pipe, a predetermined amount of refrigerant is filled, the outdoor unit has a compressor, an outdoor heat exchanger, and an expansion valve, and the indoor unit has an indoor heat exchanger. The air conditioner has a calculation model that calculates an amount of refrigerant remaining in the refrigerant circuit using at least a rotational speed of the compressor, a refrigerant discharge temperature of the compressor, a heat exchanger temperature, an opening degree of the expansion valve, and an outside air temperature, which are amounts indicating an operating state at the time of operation. The indoor heat exchanger has a sensor for detecting a temperature of refrigerant flowing through an indoor heat exchanger intermediate portion that connects a first indoor heat exchanger port portion and a second indoor heat exchanger port portion. The outdoor heat exchanger has an outdoor heat exchanger intermediate portion that connects a first outdoor heat exchanger port portion and a second outdoor heat exchanger port portion, and a sensor provided in the second outdoor heat exchanger port portion for detecting a temperature of refrigerant flowing from an outdoor heat exchanger outlet of the second outdoor heat exchanger port portion at the time of refrigeration operation. The present invention provides an air conditioner that can calculate the amount of refrigerant remaining even when only limited sensors are provided.

The utility model provides a temperature control system of a continuous hot press, which relates to the technical field of hot presses and comprises an oil tank, a heater, a heat exchanger, a pressure die end, an electric cabinet, a temperature sensor and a circulating pump. The first end of the circulating pump is connected with the heater, and the second end is connected with the pressure mold end; the temperature sensor is arranged between the circulating pump and the heater; the electric control box is electrically connected with the heater, the heat exchanger, the temperature sensor and the circulating pump. According to the utility model, rapid heating and cooling of the hot press can be realized; the stability of the working temperature of the hot press is good; the heat exchange efficiency is high; it is guaranteed that the system works under the safe pressure, and meanwhile the function of emergency pressure relief when equipment leaks and breaks down is achieved.

The invention provides an air conditioner and a control method thereof.The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a throttling device and a heater, the compressor, the outdoor heat exchanger, the throttling device and the indoor heat exchanger can be communicated to form a refrigeration circulation loop, and the air conditioner further comprises parallel branches; the parallel branches are arranged at the two ends of the throttling device in parallel, and the heater is arranged on the parallel branches so that the heater can be located between the outdoor heat exchanger and the indoor heat exchanger. When the outdoor heat exchanger defrosts, exhaust gas of the compressor is communicated with one end of the outdoor heat exchanger, the throttling device can be closed, and a refrigerant can flow through the heater to be heated and then enters the indoor heat exchanger. According to the air conditioner, the problems that in the prior art, the temperature of an indoor heat exchanger is too low in the defrosting period, flowing of lubricating oil in the heat exchanger is affected, and even oil blockage is caused can be solved.

The utility model provides gas-water separation equipment for an electrolytic bath, which comprises a dryer, a discharge pipe is arranged on the dryer, a flowmeter, a back pressure valve and a concentration detector are arranged on the discharge pipe, a gas-liquid separation mechanism is arranged on one side of the dryer, and the dryer is communicated with the gas-liquid separation mechanism through a pipeline a; an inlet pipe is arranged on the gas-liquid separation mechanism, and a plate heat exchanger, a temperature sensor and a pressure sensor are arranged on the inlet pipe; and the gas-liquid separation mechanism comprises a separation tank. Gas enters the fixing sleeve along the inlet pipe, flows out of the throwing-out pipe along the groove, the inlet groove and the liquid flowing groove, the rotating driving piece drives the driving wheel to rotate, the rotating wheel is driven by the belt to rotate, the moving rod and the throwing-out pipe are driven to rotate, a gas-water mixture is thrown out through centrifugal force, and the gas flows to the dryer through the pipeline a. Water is collected at the bottom of the separation tank, and the gas-water separation effect is enhanced through centrifugal force.

An air conditioner may include a heat exchanger temperature sensor, a compressor, at least one memory storing one or more instructions, and at least one processor, wherein the at least one processor is configured to execute the one or more instructions stored in the memory to calculate a dew point of a ceiling interior space where an indoor unit of the air conditioner is provided, obtain a surface temperature of the indoor unit based on a sensor value of the heat exchanger temperature sensor during operation of the air conditioner, and based on the obtained surface temperature of the indoor unit being lower than or equal to the dew point of the ceiling interior space, increase the surface temperature of the indoor unit by reducing a driving frequency of the compressor.

The application discloses a cascade refrigeration system flow control method and device, a refrigeration equipment and a medium. The cascade refrigeration system comprises a low-temperature stage compressor, a high-temperature stage compressor, an intermediate heat exchanger, a temperature sensor, a condensing fan and a temperature drop rate sensor. The temperature sensor is arranged on the intermediate heat exchanger. The method comprises the following steps: when the low-temperature stage compressor is started, the real-time temperature monitored by the temperature sensor is synchronously acquired, and the running time length of the low-temperature stage compressor is recorded; the running state of the low-temperature stage compressor is determined according to the real-time temperature and the running time length; and if the low-temperature stage compressor is in a low-flow running state, a low-flow response mode is started. The temperature detected by the temperature sensor and the calculated instantaneous temperature drop rate are utilized to determine the flow condition when the low-temperature stage compressor is started, and the flow control is performed according to the instantaneous temperature drop rate, so that the problem that the refrigerant flow is low and the temperature drop rate is slow due to the liquid accumulation in the intermediate heat exchanger when the low-temperature stage compressor is started is solved.

To provide an air conditioner capable of surely detecting refrigerant leakage from a refrigerant circuit.SOLUTION: The control part 50 compares an initial detection temperature being a detection value in the heat exchange temperature sensor 40 immediately after the start of operation with a first detection temperature being a detection value in the heat exchange temperature sensor 40 after a predetermined time elapses from the start of operation, opens the bypass valve 36 when a predetermined first condition is satisfied, compares a second detection temperature being a detection value in the heat exchange temperature sensor 40 after a predetermined time elapses from the opening of the bypass valve 36 with the first detection temperature, and stops the operation when a predetermined second condition is satisfied. As a result, the occurrence of refrigerant leakage from the refrigerant circuit 30 can be accurately detected regardless of the temperature around the main body case 10. In addition, since the present invention can be implemented without installing an additional member such as a room temperature sensor, the cost of the product is not increased.SELECTED DRAWING: Figure 5

The invention discloses a heat exchanger temperature segmented cascade control method and system, and the system comprises a gas flow path located on the hot side of a heat exchanger unit, and a first cooling medium flow path and a second cooling medium flow path which are located on the cold side of the heat exchanger unit. The system further comprises a temperature measuring device, a flow detecting and adjusting device, a first cascade control loop, a second cascade control loop, a temperature interval judging module and a control loop switching module. According to the method, the gas outlet temperature target value and the first cooling medium outlet temperature target interval are set, the gas outlet temperature, the first cooling medium outlet temperature and the mass flow of two paths of cooling media are collected in real time, and the temperature difference range parameter is calculated based on the relation between the first cooling medium outlet temperature and the target interval and the temperature difference range parameter. The first cascade control loop or the second cascade control loop is selected in a segmented mode to be in an active adjusting state, double-target decoupling and cooperative control over the gas outlet temperature and the first cooling medium outlet temperature are achieved, and the operation safety of a compressor and the cooling medium waste heat utilization efficiency are both considered.

The temperature control system comprises an upper-layer heat exchanger and a lower-layer heat exchanger, the upper portion of a heat pipe is arranged in the upper-layer heat exchanger, the lower portion of the heat pipe is arranged in the lower-layer heat exchanger, and a medium C in the heat pipe is communicated to a balance tank through a vapor-phase balance pipe and a liquid-phase balance pipe. The energy accumulator communicates with the upper portion of the balance tank through a pipeline and is provided with a pressure adjusting device used for dynamically adjusting system pressure to control the evaporation temperature of the medium C. The system is simple in structure, convenient to use and capable of adjusting the system pressure in a self-adaptive mode, so that the evaporation temperature of the medium C is always higher than the freezing temperature of the working medium B, and the working medium B cannot be frozen in the heat exchange process; the temperature control precision is high, the response is fast, the system stability is high, the safety and the heat exchange efficiency of the system are improved, and high practical value is achieved in industrial application.

The invention provides a carbon deposition cleaning control method and a parking heater, and the method comprises the steps: obtaining the operation data of the parking heater; the operation data comprises at least one of the following items: the temperature of a heat exchanger of the parking heater, the temperature of tail gas, the resistance value of an ignition plug in the parking heater, the operation duration of the parking heater at each operation gear, the starting times of the parking heater and the ignition failure times of the parking heater; comparing the operation data with a preset threshold value corresponding to the operation data, and determining whether to execute a carbon deposition cleaning operation or not; and in response to the fact that the carbon deposition cleaning operation is determined to be executed, the rotating speed of a draught fan in the parking heater is increased to the preset rotating speed, and / or the oil pumping frequency of the parking heater is increased to the preset frequency.

A chiller system capable of controlling the temperature of a heat exchanger without tuning, according to an embodiment of the present invention, comprises: a reservoir tank storing a fluid recovered from a semiconductor facility; a recovery line through which the recovered fluid is stored in the reservoir tank; a supply line through which the stored fluid is supplied to the semiconductor facility; a pump pumping the fluid to the semiconductor facility; and a heat exchanger temperature control system including a heat exchanger and a heat exchanger temperature control unit.

The utility model relates to an ethylene oxide feeding device which comprises a reaction kettle, a feeding device communicated with a feeding port of the reaction kettle and a first heat exchanger arranged between the feeding device and the feeding port, and the first heat exchanger is connected with a heat exchange system. The first heat exchanger does not need to be subjected to heat exchange by heat generated by the reaction kettle, so that the temperature of the first heat exchanger can be accurately controlled, the temperature of ethylene oxide entering the reaction kettle is relatively high and is in a vaporized state, the temperature of reaction fog drops of the ethylene oxide reaches the addition reaction temperature, and the addition reaction efficiency of the ethylene oxide is improved.

The application discloses an air conditioner and a control method thereof, a storage medium, and an electronic device and a control device, and the control method comprises the following steps: acquiring operation parameters of the air conditioner, wherein the operation parameters comprise an indoor side wind speed of the air conditioner, and a temperature difference between an indoor side inlet air temperature and an indoor side heat exchanger temperature of the air conditioner; acquiring outdoor side parameters of the air conditioner, wherein the outdoor side parameters comprise an outdoor temperature; and adjusting a compressor operation frequency of the air conditioner according to the operation parameters and the outdoor side parameters. The application can select a suitable compressor operation frequency, avoid a temperature of an electric control connected with the compressor being too high, reduce a failure rate, and prolong a service life of the air conditioner.

The invention provides an air conditioner defrosting misjudgment restraining method, a control device and an air conditioner, and relates to the technical field of air conditioners. The air conditioner defrosting misjudgment restraining method comprises the steps that the outdoor environment temperature, the outdoor unit heat exchanger temperature and the temperature difference between the outdoor environment temperature and the outdoor unit heat exchanger temperature are obtained; judging whether the outdoor environment temperature and the temperature difference meet a preset defrosting condition for the first time or not; if yes, whether a defrosting mode is started or not is determined according to preset judgment factors, and the preset judgment factors comprise the temperature change value of the temperature of the outdoor unit heat exchanger within the first preset time. By means of the air conditioner defrosting misjudgment restraining method, air conditioner defrosting misjudgment can be effectively restrained, the judgment accuracy of the air conditioner entering the defrosting mode is improved, extra energy consumption caused by invalid defrosting, indoor temperature fluctuation caused by mistaken defrosting and frequent starting and stopping of a compressor caused by mistaken defrosting are reduced, and the air conditioner defrosting misjudgment restraining method is suitable for popularization and application. And the air conditioner heating APF and the user comfort are correspondingly improved, and the service life of the compressor is prolonged.

The embodiment of the invention provides a refrigerant shortage detection method and device, an air conditioner and a computer readable storage medium, and the refrigerant shortage detection method is applied to the air conditioner and comprises the steps that when a refrigerant shortage detection instruction is received, the air conditioner is controlled to operate according to preset detection operation parameters; according to the indoor heat exchanger temperature and the exhaust temperature of the air conditioner, whether the air conditioner is in a stable operation state or not is determined; and when it is determined that the air conditioner is in the stable operation state, whether the refrigerant amount of the air conditioner is insufficient or not is determined according to the indoor environment temperature, the indoor heat exchanger temperature of the air conditioner and the compressor current.

The utility model relates to a sample gas pretreatment technical field, is a kind of steam-water analyzer pretreatment control device, it includes sample gas pipe, primary fast pressure reduction pipeline, heat exchanger, temperature control valve and secondary accurate pressure reduction pipeline.The utility model is reasonable and compact in structure, convenient to use, its through primary fast pressure reduction pipeline, secondary accurate pressure reduction pipeline, flowmeter and the pressure detection device in steam-water analyzer instrument can form two-stage linkage's flow pressure composite regulating system, improve flow pressure regulating response speed, to fast, accurate regulation sampling steam pressure, make the pressure of sampling steam can satisfy set pressure requirement, avoid the component distortion caused by pressure fluctuation;Through temperature control valve, spiral pipe heat exchanger and two-stage linkage's flow pressure composite regulating system, establish the collaborative control mechanism of cooling, pressure reduction discharge and flow limiting protection, avoid steam-water analyzer instrument damage caused by sampling steam overtemperature overpressure.

The invention discloses a heat exchanger temperature adjustment and heat exchange deterioration recovery method based on a liquid nitrogen working medium. Constructing test conditions; 2, air state adjustment: adjusting the air flow and temperature of the air inlet of the precooler according to the test working condition of the test engine; 3, initial supply of liquid nitrogen; 4, liquid nitrogen flow adjustment is conducted, specifically, the air flow and temperature of an air inlet of the precooler are changed respectively, and the liquid nitrogen supply flow is adjusted at the same time in the process; 5, liquid nitrogen heat exchange failure judgment is conducted, and when the temperature of liquid nitrogen at a medium outlet is decreased, but the temperature of an air outlet is almost unchanged or continuously increased, heat exchange deterioration occurs; sixthly, liquid nitrogen heat exchange failure recovery is conducted, the liquid nitrogen supply pressure is kept, and it is ensured that liquid nitrogen in a medium pipeline in the precooler is in a supercritical state; and 7, liquid nitrogen heat exchange failure recovery is judged, the liquid nitrogen supply flow is adjusted, and when the air temperature of an air outlet is decreased and the nitrogen discharge temperature is increased, it is indicated that heat exchange deterioration is recovered.

The embodiment of the application discloses an air conditioner and a control method thereof, relates to the technical field of air conditioners, and is used for realizing different defrosting strategies of an outdoor heat exchanger at different frost formation degrees. The air conditioner comprises: a refrigerant circulation loop, which enables refrigerant to circulate in a loop formed by a compressor, an outdoor heat exchanger, a waterside heat exchanger, an expansion valve and a four-way valve; the outdoor heat exchanger is a fin heat exchanger; a first temperature sensor is used for detecting an ambient temperature; a second temperature sensor is arranged on the outdoor heat exchanger and is used for detecting the temperature of the outdoor heat exchanger; and a controller is configured to: acquire the ambient temperature detected by the first temperature sensor and the temperature of the outdoor heat exchanger detected by the second temperature sensor; determine a target defrosting strategy of the outdoor heat exchanger from a plurality of defrosting strategies based on the ambient temperature and the temperature of the outdoor heat exchanger; and control the air conditioner to execute the target defrosting strategy.

To appropriately determine whether or not refrigerant is stagnating in the heat exchanger of a stopped indoor unit. [Solution] An air conditioning apparatus according to one aspect of the present invention includes a refrigerant circuit and a control unit. The refrigerant circuit includes a heat source unit having a heat source-side heat exchanger and an outdoor heat exchanger temperature sensor, a user-side unit having a user-side heat exchanger and an indoor heat exchanger temperature sensor, connecting piping including liquid and gas pipes connecting the heat source unit and the user-side unit, and a valve for controlling the amount of refrigerant flowing through the connecting piping. The user-side unit includes at least two indoor units. The control unit determines whether refrigerant is stagnating in the user-side heat exchanger of the stopped indoor unit using either the temperature detected by the outdoor heat exchanger temperature sensor or the temperature detected by the indoor heat exchanger temperature sensor of the operating indoor unit, and the temperature detected by the indoor heat exchanger temperature sensor of the stopped indoor unit.

The invention discloses a control method of a heat pump system, the heat pump system and a storage medium, and relates to the technical field of heat pumps. A refrigerant circulation loop of the heat pump system comprises a compressor, an indoor heat exchanger, a first throttling device and an outdoor heat exchanger, the method comprises the steps that the heat pump system is controlled to operate so that the outdoor heat exchanger can be in a condensation state and the indoor heat exchanger can be in an evaporation state; and the first throttling device and / or the compressor are / is controlled to operate according to the temperature of the outdoor heat exchanger and the outdoor environment temperature detected by an outdoor temperature sensor of the heat pump system. The system reliability is guaranteed, and the refrigerating effect of the heat pump system is improved.

The application provides a photovoltaic heat pump system and a standing start control method, and relates to the technical field of heat pump units. The photovoltaic heat pump system comprises a compressor, a crank heating belt, a double-pipe heat exchanger, an electronic expansion valve, a fin heat exchanger, a photovoltaic panel, a fluorine pump, a four-way valve and a controller. The first branch and the second branch are arranged in parallel between the photovoltaic panel and the fin heat exchanger, the fluorine pump is arranged on the first branch, and the one-way valve is arranged on the second branch. The standing start control method of the photovoltaic heat pump system is as follows: when the standby time is less than the first threshold value and the environmental temperature is lower than the threshold value, the crank heating belt is started to heat the compressor; when the standby time exceeds the first threshold value, the crank heating belt is started or the crank heating belt and the fluorine pump are simultaneously started according to the comparison result of the fin heat exchanger temperature and the preset threshold value. According to the system standing state and the environmental conditions, the circulating heating of the migrated liquid refrigerant is realized, and the first start safety of the photovoltaic heat pump system is improved.

The application discloses a molten salt-conductive oil photo-thermal unit oil-salt heat exchanger conductive oil and molten salt injection method, adopts a tube-shell heat exchanger, and is provided with electric heat tracing, a flow sensor, a temperature sensor, a pressure sensor, a salt pump, a pipeline, a valve and other equipment, and through a nitrogen replacement-equipment preheating-conductive oil injection-discharge of oil side nitrogen-maintenance of conductive oil flow-all equipment heat tracing system and conductive oil temperature reaches heating to 285±5ºC-salt temperature and oil-salt heat exchanger temperature difference is within ±10ºC, salt injection-discharge of salt side nitrogen-reinjection and recovery of excess molten salt in a pipeline process method, the temperature, temperature change rate and flow of the conductive oil and molten salt injection system are adjusted, so that the medium is safely and effectively injected into the system. The method has the advantages of simple and reliable operation, low technical requirement difficulty, and safety guarantee of the molten salt-conductive oil photo-thermal unit oil-salt heat exchanger conductive oil and molten salt injection work.

The present application discloses an air conditioner (100), comprising: a compressor (1), an indoor heat exchanger (2), an outdoor heat exchanger (3), a temperature sensor (5), a controller (6), and a memory (7). The controller (6) is configured to: when the air conditioner (100) operates for the first time, on the basis of a set temperature and an initial temperature of an indoor environment, select an initial frequency for the compressor (1) from the memory (7), and control the compressor (1) to operate at the selected initial frequency; acquire an operating time of the compressor (1) and a heat exchange amount of the indoor heat exchanger (2) when the temperature of the indoor environment reaches the set temperature; on the basis of the operating time and the heat exchange amount, optimize an operating frequency of the compressor (1) to obtain an optimized frequency of the compressor (1); and when the air conditioner (100) operates again, control the compressor (1) to operate at the optimized frequency. The air conditioner (100) disclosed in the present application enables dynamic energy-saving control and has improved energy-saving performance.

The invention discloses an operation control method and device of an air conditioner, the air conditioner and a storage medium. According to the method, when the air conditioner operates in a refrigeration mode, a communication fault occurs between an indoor unit and an outdoor unit, and the duration time of the communication fault reaches a first preset duration, off-line control operation is executed; the indoor unit controls the switching device arranged in the indoor unit to be alternately switched between the second preset time length of conduction and the third preset time length of disconnection, and then the outdoor unit power supply is controlled to be alternately switched between the conduction and disconnection, so that the outdoor unit keeps refrigerating and continues to operate; and the indoor unit judges whether the operation modes of the indoor unit and the outdoor unit are consistent or not by collecting the indoor environment temperature and the indoor heat exchanger temperature, even if the indoor unit and the outdoor unit of the air conditioner have a communication fault, the air conditioner can still continue to operate in the current operation mode, and the refrigeration stability of the air conditioner can be ensured when the air conditioner is subjected to strong interference. And the user experience is improved.

This invention discloses an air conditioning device, including an outdoor unit. The outdoor unit includes a housing and a partition located within the housing. The partition divides the space within the housing into a first chamber and a second chamber. The first chamber houses a compressor, and the second chamber houses an outdoor heat exchanger and an outdoor fan. The housing has an outdoor power module inlet communicating with the first chamber. The partition has a through hole connecting the first and second chambers. The outdoor power module of the air conditioning device is located within the first chamber. The outdoor fan generates airflow that sequentially passes through the outdoor power module inlet, the outdoor power module, and the through hole, dissipating heat from the outdoor power module. In this invention, the airflow generated by the outdoor fan passing through the outdoor power module does not pass through the outdoor heat exchanger. Therefore, the air conditioning device can ensure that the heat dissipation of the outdoor power module is not affected by the temperature of the outdoor heat exchanger in all modes.

The invention relates to a ship temperature control system suitable for a microchannel heat exchanger under complex working conditions, the system comprises the microchannel heat exchanger, an LNG spraying precooling mixer, a mist separator, a common heat exchanger, a temperature sensor and a feedback adjusting device, an LNG storage tank is connected with an inlet of the microchannel heat exchanger and a nozzle end of the LNG spraying precooling mixer; an outlet of the micro-channel heat exchanger is connected with an inlet of the LNG spraying pre-cooling mixer, an outlet of the LNG spraying pre-cooling mixer is connected with an inlet of the fog separator, an outlet of the fog separator is connected with an inlet of the common heat exchanger, a recovery end of the fog separator is connected with the LNG storage tank, and an outlet of the common heat exchanger is connected with the main and auxiliary machine; and the temperature sensor is arranged at an outlet of the LNG spraying precooling mixer and is in communication connection with the feedback adjusting device. Comprehensive temperature regulation and control can be carried out on the NG gas generated by the micro-channel heat exchanger under the complex working condition, the constant outlet gas temperature is finally achieved, and continuous and stable energy supply is achieved.

The application discloses a heat exchanger temperature alternating test system and a test method, which comprises a compressor, a condenser, an expansion valve, an evaporator and first to fourth bypass connecting pipes. A first three-way device is arranged on a pipeline between the compressor and the condenser, and a second three-way device is arranged on a pipeline between the compressor and the evaporator. The first bypass connecting pipe is connected to the first three-way device and is provided with a first constant temperature heater and a first switch valve. The second bypass connecting pipe is connected to the pipeline between the first three-way device and the condenser and is provided with a second switch valve. The first end of the third bypass connecting pipe is connected to the second three-way device and is provided with a second constant temperature heater and a third switch valve, and the second end of the third bypass connecting pipe is connected to the first bypass connecting pipe. The first end of the fourth bypass connecting pipe is connected to the pipeline between the second three-way device and the compressor and is provided with a fourth switch valve, and the second end of the fourth bypass connecting pipe is connected to the second bypass connecting pipe.