460 results about "Evaporation temperature" patented technology

The invention provides a radiation air conditioning system. The radiation air-conditioning system comprises a radiation air-conditioning plate, an indoor heat exchanger, a compressor, an outdoor heat exchanger and an indoor temperature detection device, and the controller is configured to close a radiation air-conditioning plate electromagnetic valve and open a heat exchanger electromagnetic valve after a starting-up signal is obtained; if the change rate d of the compressor frequency within the time t0 is not larger than the preset change rate d1, when the evaporation temperature is smaller than the dew point compensation temperature, the opening degree of the first electronic expansion valve is gradually reduced till the evaporation temperature is not smaller than the dew point compensation temperature, and the opening degree of the first electronic expansion valve is S1 at the moment; if S1 is not smaller than the preset opening degree Sa, a radiation air conditioner plate electromagnetic valve is opened, a heat exchanger electromagnetic valve is opened, and circulation is carried out again; if S1 is smaller than the preset opening degree Sa, a radiation air conditioner plate electromagnetic valve is closed, and a heat exchanger electromagnetic valve is opened; and if the continuous operation time of the compressor is t10 and the first temperature difference value delta T belongs to the target temperature interval [delta T1, delta T2], the electromagnetic valve is opened and closed according to the capacity section where the frequency of the compressor is located.

The invention discloses an air conditioner heat management double-temperature-zone cooperative control method, device and equipment and a storage medium, and relates to the technical field of electric vehicle control. The method comprises the steps that the target air outlet temperature is obtained, and the starting state of a double-temperature-zone air conditioner is obtained; the corresponding temperature adjusting device is started according to the target air outlet temperature, the target adjusting temperature is set according to the starting state of the double-temperature-zone air conditioner so as to conduct temperature adjustment, and the target adjusting temperature comprises the target evaporation temperature and / or the warm air temperature; the opening state of the air door is controlled according to the opening state of the double-temperature-zone air conditioner, a cold source and a heat source are reasonably opened, execution mechanisms such as an electronic expansion valve, a heat source distribution three-way water valve and a temperature air door are cooperatively controlled, the cold and heat sources are reasonably distributed, energy consumption is saved, the opening degree of the air door is controlled in a closed-loop mode, and comfort is improved to a great extent.

The invention discloses a polar region water area temperature difference energy control method and a power generation device, and belongs to the technical field of temperature difference energy power generation. The control method comprises the steps that under the condition that the net output power of the power generation device is maximum, the optimal parameter sequence of different cold and heat source working conditions is determined; constructing an MPC prediction model by taking the rotation speed of a working medium pump and the rotation speed of an expansion machine as input parameters and the evaporation temperature and the condensation temperature as output results according to the incidence relation between the pressure of the cycle working medium and the evaporation temperature and the condensation temperature; constructing a target function according to the optimal parameter sequence and an output result of the MPC prediction model; and based on the MPC prediction model and the target function, the MPC prediction model is iteratively updated by adjusting the rotating speed of the working medium pump and the rotating speed of the expansion machine, the optimal rotating speed of the working medium pump and the optimal rotating speed of the expansion machine are determined, and the operation parameters of the power generation device are controlled. The operation parameters of the power generation device are adaptively adjusted through the working conditions of the cold and heat sources, so that the net output power of the power generation component is maximum, and the power generation efficiency is improved.

The invention relates to an air conditioner temperature and humidity independent control system and method based on two-stage coil chilled water. On the basis of the existing chip plant temperature and humidity independent control based on a fresh air processing unit, a return air drying and cooling coil and a fan filtering unit, low-temperature chilled water outlet of a water chilling unit firstly passes through a fresh air re-cooling coil; return water obtained after the temperature of the fresh air re-cooling coil pipe rises serves as water supply of the fresh air pre-cooling coil pipe and the return air cooling dry coil pipe, so that two-stage coil pipe chilled water is formed, and the return water of the fresh air pre-cooling coil pipe and the return water of the return air cooling dry coil pipe are mixed and then serve as chilled water return water of the water chilling unit. By increasing the return water temperature of the water chilling unit, the average evaporation temperature of an evaporator of the water chilling unit is increased. A bypass is arranged between an inlet and an outlet of the return air cooling dry coil, and the air temperature in the plant is controlled by adjusting the bypass flow through an electric two-way adjusting valve and a PID controller. Compared with the prior art, the invention has the advantages of high unit energy efficiency ratio, low refrigeration energy consumption, simplified system and the like.

Provided are a low-energy-consumption control method for a heat pump low-temperature dryer, an electronic device, and a storage medium, belonging to the technical field of heat pump control. The present method, by means of controlling a compressor operating point and dehumidification performance of an evaporator, can achieve the goal of reducing overall device energy consumption. In a heat pump unit, the compressor, a condenser, an expansion valve and the evaporator are connected in sequence to form a refrigeration circulation loop; the compressor operating point comprises evaporation temperature and condensation temperature. First, an operating point with a COP value larger than a set value when preset evaporation temperature and condensation temperatures are satisfied is selected as an optimal operating point for the compressor. Then, structural design of the heat exchanger is conducted, so that a heat exchange volume of the heat exchanger can satisfy the requirement that the compressor operates at the optimal operating point. During operation of the heat pump low-temperature dryer, the operating state of the heat pump unit is dynamically adjusted in real time, so that the compressor is kept running at the optimal operating point.

The invention provides an evaporative cooling type water cooling system and a control method thereof.The evaporative cooling type water cooling system comprises a compressor, a freezing pipeline and an evaporator, a freezing water pump is arranged on the freezing pipeline, and the control method of the evaporative cooling type water cooling system comprises the steps that the frequency of the compressor is adjusted, the water outlet temperature of the freezing pipeline is within a first preset range, and the frequency when the compressor is stable at the moment is obtained; an adjustment coefficient X is obtained according to the ratio of the frequency F1 when the compressor is stable to the maximum set frequency F1max of the compressor; determining the initial adjustment frequency of the chilled water pump through the adjustment coefficient X; and adjusting the frequency of the chilled water pump on the basis of the operation of the initial adjustment frequency of the chilled water pump to enable the evaporation temperature of the evaporator to be within a second preset range. By means of the technical scheme, the problem that in the prior art, an evaporative cooling type water cooling system is high in energy consumption can be solved.

The invention relates to the technical field of refrigeration, and discloses a control method for an air conditioning system, which comprises the following steps: under the condition that the air conditioning system enters a double-evaporation-temperature refrigeration mode, determining a third target evaporation temperature of a first indoor heat exchanger, and determining a target evaporation temperature difference between the first indoor heat exchanger and a second indoor heat exchanger; the opening degree of a first throttling valve is adjusted so that the evaporation temperature of the first indoor heat exchanger can approach the third target evaporation temperature; and the opening degree of a second throttling valve is adjusted so that the evaporation temperature difference value of the first indoor heat exchanger and the second indoor heat exchanger can approach the target evaporation temperature difference value. The target evaporation temperature of the first indoor heat exchanger is set firstly, then the evaporation temperature of the second indoor heat exchanger is regulated and controlled based on the target evaporation temperature difference, gradient cooling of indoor air can be achieved, the comfortable experience of a user can be guaranteed, and the energy-saving effect of the air conditioning system is improved. The invention further discloses a control device for the air conditioning system and the air conditioning system.

The invention discloses a large-temperature-span cascade adjustable heat recovery rectification system, which belongs to the technical field of rectification systems, and comprises a rectification tower, an evaporator group, a compressor, a tower kettle heat exchanger, an ejector, a gas-liquid separator, a first liquid storage tank and a second liquid storage tank, the evaporator set comprises a first evaporator and a second evaporator which are connected in series, one end of the rectifying tower is connected with the first evaporator, the second evaporator is connected with the second liquid storage tank, the first evaporator and the second evaporator are both connected with the ejector, and one end of the gas-liquid separator is connected with one end of the ejector. And the other end of the gas-liquid separator is respectively connected with the first liquid storage tank, the first evaporator and the second evaporator. According to the invention, compression and injection modes are adopted, liquid supply flash gas is used as power to inject heat pump working medium gas of the second evaporator, cascade recovery of tower top gas condensation heat is realized, the evaporation temperature is increased, the heat pump rectification efficiency is improved, and the operation cost is reduced.

The invention provides a condenser type refrigeration cycle intelligent adaptation control method and system, and relates to the technical field of refrigeration. The method comprises the steps that environment state parameters are obtained, the environment frost point temperature is calculated, and an altitude correction factor representing the air side heat exchange capacity is calculated; executing boundary contraction transformation on a preset compressor operation envelope based on the altitude correction factor, and determining an allowable condensing pressure upper limit; an evaporator temperature response sequence is monitored, the time domain integral cumulant of the temperature response sequence relative to the environment frost point temperature is calculated, and the allowable evaporation temperature lower limit is dynamically increased based on the cumulant; constructing a target operation domain according to the allowable condensation pressure upper limit and the allowable evaporation temperature lower limit; and determining a current operation working point, and adjusting the control variable to enable the operation working point to fall into the target operation domain. The safety of the condensation side and the frost prevention stability of the evaporation side can be considered under the high-altitude and complex environment working conditions, and the continuous operation reliability of refrigeration circulation is improved.

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.

This application relates to the field of heat pump air conditioners, in particular to a four-pipe air-cooled heat pump unit and its control method. The four-pipe air-cooled heat pump unit includes a compressor, a four-way valve, a finned coil, a hot water side heat exchanger, a cold water side heat exchanger, a three-way valve, a first electronic expansion valve, a second electronic expansion valve, and a gas-liquid separator. The finned coil includes a first heat exchange circuit on the air inlet side and a second heat exchange circuit on the air outlet side, and the heat exchange area of the second heat exchange circuit is larger than that of the first heat exchange circuit. For the four-pipe air-cooled heat pump unit of this application, according to the requirements of the environment and working conditions, by using different finned coil heat exchange circuits, when the ambient temperature is lower than the compressor suction saturation temperature, refrigerant will not accumulate in the finned coil, and as much refrigerant as possible can be made to participate in the cycle of the refrigeration system, preventing the evaporation temperature of the unit from dropping significantly due to the reduction in the circulating amount of the refrigerant participating in the work.

The invention discloses an operation control method for a direct expansion type refrigerating unit. The operation control method comprises the following steps that firstly, whether a compressor breaks down or not is detected; step 2, detecting whether frequency reduction protection is needed or not; 3, calculating a load according to a PID algorithm; fourthly, the direct expansion type refrigerating unit is controlled to operate according to detection and calculation results in the first step to the fourth step; by automatically adjusting the frequency of the compressor, the problems of part damage and large air outlet temperature fluctuation caused by frequent starting / stopping of the direct expansion section can be avoided, automatic operation of the direct expansion type air conditioning unit system can be achieved in the stopping state, loading or frequency reduction is carried out on the compressor by calculating the load, and the working efficiency is improved. The stability of the system and the operability of the unit system are improved; the rotating speed of the condensation fan / the evaporation fan is controlled through the condensation temperature and the evaporation temperature, the indoor temperature is accurately controlled, temperature fluctuation is reduced, meanwhile, the service life of the compressor can be prolonged, intelligent operation control is provided, and the operation process is simplified.

A compressor control method and apparatus, a device and a storage medium. The control method comprises: acquiring a demand of an evaporator for refrigeration; on the basis of the demand for refrigeration, determining a first compressor rotating speed; acquiring evaporation temperature error data of the evaporator; on the basis of the evaporation temperature error data, determining a second compressor rotating speed; according to the first compressor rotating speed and the second compressor rotating speed, calculating a target compressor rotating speed; and, on the basis of the target compressor rotating speed, controlling a compressor. The control method enables rotating speeds of compressors to be closer to rotating speeds of actual refrigeration requirements and effectively reduces errors, allowing air conditioning systems to exert the optimal efficiency.

The invention relates to an operation method of a shell and tube heat exchanger for an organic Rankine cycle. A refrigerant is input into the cylinder through the liquid inlet connecting pipe and sequentially flows through the preheating area, the evaporation area and the overheating area. A high-temperature heat source enters from the water inlet chamber, sequentially flows through the evaporation area heat exchange pipe, the overheating area heat exchange pipe, the water return chamber and the preheating area heat exchange pipe and then is discharged from the water outlet chamber, and a reverse pure countercurrent flow heat exchange path is formed. In the preheating area, a refrigerant is preheated through a condensation heat exchange pipe of an inner-tooth outer-fin structure, and forced convection is formed by means of a baffle plate until the saturated evaporation temperature is reached; in the evaporation area, the refrigerant absorbs heat and is gasified in the evaporation heat exchange pipes on the outer surfaces of the micropores and the inner walls of the threads; and in the overheating area, refrigerant gas is subjected to overheating treatment through the heat exchange pipe with the reinforced turbulent flow structure, flows circuitously through the baffle plate and then is output to the expansion machine through the gas outlet connecting pipe. According to the method, preheating, evaporation and overheating functions are integrated in single equipment, and the heat exchange efficiency is improved and the system complexity is reduced by optimizing a heat exchange tube structure and a flow path in a partitioned manner.

The invention discloses a novel compression-injection-absorption thermal coupling type refrigerating system and device, a solution loop between a generator and an absorber is driven by high-temperature waste heat of an outlet of a compressor, and a low-pressure-stage compression function is realized through a solution pump. A compressor is a key component in an electrically-driven compression refrigeration cycle, a two-stage compression refrigeration system is generally adopted in a refrigeration cycle with a lower evaporation temperature in order to reduce the evaporation pressure of a refrigerant and improve the cooling capacity grade, but in the refrigeration cycle, the negative pressure degree of a low-pressure stage is higher, so that the safe and economical operation of the two-stage compression refrigeration system is not facilitated. According to the system and the device, a compression type refrigeration cycle and an absorption type refrigeration cycle are coupled in a cascade serial connection mode through the ejector, and a novel compression-ejection-absorption thermal coupling type refrigeration cycle is constructed; and low-voltage-stage power consumption can be reduced, the operation reliability of low-voltage-stage equipment can be improved, and wide popularization and application prospects are achieved.

The present application provides a control method, device and equipment for defrosting a heat pump air conditioner. In the method, the ambient temperature, the frosting time of the evaporator, the air humidity, the evaporation temperature, the fin temperature of the evaporator, and the suction pressure of the compressor are obtained; the temperature difference between the two ends of the evaporator is determined according to the ambient temperature and the fin temperature; the thickness of the frost layer is calculated according to the temperature difference between the two ends of the evaporator, the frosting time and the air humidity; based on the thickness of the frost layer, the ambient temperature, the fin temperature, the evaporation temperature and the suction pressure of the compressor, it is judged whether the defrosting entry conditions are met; if the defrosting entry conditions are met, the heat pump air conditioner is controlled to enter the defrosting operation, and the defrosting time of the defrosting operation is obtained; when the frost layer thickness and / or the defrosting time reach the defrosting exit conditions, the defrosting operation is exited. The above method can more accurately determine the timing of the defrosting operation by determining the thickness of the frost layer, and combining the frost layer thickness and more data, effectively avoiding the situation of mistaken defrosting.

The invention belongs to the technical field of circulating refrigeration equipment, and discloses a multi-stage composite circulating cooling unit suitable for an inactive secondary refrigerant and a refrigerating system. The unit comprises a high-temperature-stage evaporator and a low-temperature-stage evaporator, a high-temperature-stage gas-liquid separation part is arranged on the high-temperature-stage hot fluid side, the evaporation temperature of the high-temperature-stage hot fluid side can be between the freezing point temperature and the dew point temperature, and the evaporation temperature of the low-temperature-stage hot fluid side is smaller than that of the high-temperature-stage hot fluid side. And the non-active secondary refrigerant can be cooled to the set temperature step by step. By means of the arrangement, the high-temperature-stage evaporator can be continuously dewed but not frosted, it is guaranteed that dehumidification work is continuously carried out, a large proportion of moisture in the inactive secondary refrigerant is removed, favorable conditions are created for work of the low-temperature-stage evaporator, the defrosting interval time of the low-temperature-stage evaporator is prolonged, and the defrosting efficiency of the low-temperature-stage evaporator is improved. The phenomenon that the circulating air duct is frequently blocked is improved, the high circulating air volume and the high refrigerating effect are guaranteed, and then the product yield and the economic benefits are directly improved.

The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner, and aims to solve the problems of how to effectively prevent an indoor heat exchanger from frosting and meet the low-temperature refrigeration requirement of a user while reducing energy consumption. In order to achieve the purpose, according to the control method of the air conditioner, when the air conditioner meets the low-temperature refrigeration condition, the opening degree of a first air guide plate and the opening degree of a second air guide plate are adjusted according to the exhaust pressure and the preset pressure, so that the air circulation efficiency of an outdoor unit can be adjusted, and the heat exchange efficiency of an outdoor heat exchanger is weakened; therefore, the evaporation temperature of the indoor heat exchanger is increased, frosting of the indoor heat exchanger is avoided, normal operation of the air conditioner under the low-temperature refrigeration working condition is ensured, the low-temperature refrigeration requirement of a user is met, the operation reliability of the air conditioner is improved, the refrigeration operation range of the air conditioner is widened, dependence on a heating device is not needed, and energy consumption is low.

The invention provides a radiation air conditioning system. The radiation air-conditioning system comprises a radiation air-conditioning plate, an indoor heat exchanger, an electronic expansion valve, a radiation air-conditioning plate electromagnetic valve and a heat exchanger electromagnetic valve; the controller is configured to close the electromagnetic valve of the radiation air conditioner plate and open the electromagnetic valve of the heat exchanger after a starting signal is obtained; when the difference value delta T between the indoor environment temperature value and the preset indoor environment temperature value belongs to a target temperature interval [delta T1, delta T2], when the evaporation temperature is not smaller than the dew point compensation temperature, and if the compressor frequency is not smaller than the preset compressor frequency f2, a radiation air conditioner plate electromagnetic valve is closed, and a heat exchanger electromagnetic valve is opened; if the compressor frequency is smaller than f2 and larger than or equal to f1, a radiation air conditioner plate electromagnetic valve is opened, and a heat exchanger electromagnetic valve is opened; if the compressor frequency is smaller than f1, a radiation air-conditioning board electromagnetic valve and a heat exchanger electromagnetic valve are opened firstly, and if it is detected that the compressor frequency is smaller than f1 again, the radiation air-conditioning board electromagnetic valve is opened, and the heat exchanger electromagnetic valve is closed; f2 is greater than f1, and the control logic is relatively simple.

This invention provides a method and device for preventing condensation in a wall-mounted inverter air conditioner. The control method includes the following steps: when the air conditioner enters the cooling anti-direct-blow mode, time-sharing frequency limiting control and airflow compensation control are executed simultaneously. The time-sharing frequency limiting control, within the time window before condensation forms, controls the compressor to operate at the highest frequency limit corresponding to the currently set fan speed of the indoor fan to cool and dehumidify; then, frequency reduction is used to further reduce condensation formation. The airflow compensation control uses the airflow at the default position of the air guide vane during normal cooling as a reference, and compensates for the airflow loss caused by changes in the position of the air guide vane by increasing the indoor fan speed, thereby increasing the evaporation temperature and outlet air temperature. This invention solves the problem that existing technologies, when dealing with condensation generated in the anti-direct-blow mode of wall-mounted air conditioners with large vanes, cannot simultaneously consider user experience, cooling effect, and hardware cost.

The invention relates to the technical field of refrigeration, and discloses a control method for an air conditioning system, which comprises the following steps: when the air conditioning system enters a double-evaporation-temperature dehumidification mode, determining a first target evaporation temperature of a first indoor heat exchanger, and determining a second target evaporation temperature of a second indoor heat exchanger; the opening degree of a first throttling valve is adjusted so that the evaporation temperature of the first indoor heat exchanger can approach the first target evaporation temperature; the opening degree of a second throttling valve is adjusted so that the evaporation temperature of a second indoor heat exchanger can approach to the second target evaporation temperature; the first target evaporation temperature is higher than the dew-point temperature, and the second target evaporation temperature is lower than the dew-point temperature. The target evaporation temperature corresponding to the first indoor heat exchanger and the target evaporation temperature corresponding to the second indoor heat exchanger are set, relative independent control over the indoor temperature and humidity can be achieved, the comfortable experience of a user can be guaranteed, and the energy-saving effect of the air conditioner system is improved. The invention further discloses a control device for the air conditioning system and the air conditioning system.

The invention discloses a heat pump equipment control method and device, a medium and heat pump equipment, and relates to the technical field of heat pumps, the method comprises the steps that low pressure, return air temperature, environment temperature and air humidity are received, and the defrosting ending duration from the last defrosting period is determined; determining an evaporation temperature according to the low pressure; when the evaporation temperature and the air return temperature are both lower than the target temperature and the defrosting ending duration is longer than the target interval duration, the heat pump equipment is controlled to enter a defrosting mode; wherein the target temperature is determined according to the environment temperature and the air humidity, and the target interval duration is determined according to the air humidity. Defrosting can be avoided when no frost exists, so that the energy efficiency is improved, defrosting can be carried out in time, and the defrosting cleanliness is improved.

A cooling system implements various processes to improve efficiency in high ambient temperatures. First, the system can flood one or more low side heat exchangers in the system. Second, the system can direct a portion of vapor refrigerant from a low side heat exchanger to a flash tank rather than to a compressor. Third, the system can transfer heat from refrigerant at a compressor suction to refrigerant at the discharge of a high side heat exchanger.

The invention discloses a subcooler and a deep subcooler for a refrigerating system and a control method of the subcooler and the deep subcooler, and belongs to the technical field of refrigeration. The deep subcooler comprises a subcooling heat exchange unit, an independent cold source loop and a pressure control valve; the supercooling heat exchange unit is connected between the high-pressure liquid reservoir and the throttling device in series, and the primary liquid refrigerant is deeply cooled to be equal to or close to the target value of the evaporation temperature through low-temperature cooling capacity provided by a low-pressure evaporation system or an independent cold source loop. The independent cold source is driven by a compressor with the minimum refrigerating capacity in the system, and an air return pipeline of the independent cold source is bridged with air return pipelines of other compressors of the system through an outlet pressure balance valve, so that the surplus refrigerating capacity is fully utilized. The evaporation pressure of a cold source loop is changed by monitoring the supercooled liquid temperature and feeding back and adjusting the opening degree of a pressure control valve, precise closed-loop control over the supercooled temperature is achieved, throttling flash gas can be remarkably reduced or even eliminated, the effective refrigerating capacity of unit refrigerant and the heat exchange efficiency of an evaporator are improved, and the system energy efficiency is greatly improved.

The small-temperature-difference double-evaporation-temperature single-stage refrigerating system comprises a compressor, a condenser, a low-temperature loop and a high-temperature loop, the compressor is used for compressing low-temperature refrigerant gas into high-temperature refrigerant gas, and the condenser is used for cooling the high-temperature refrigerant gas into high-pressure liquid; the high-pressure liquid enters a low-temperature loop and a high-temperature loop, a low-temperature evaporator is arranged in the low-temperature loop, a high-temperature evaporator is arranged in the high-temperature loop, the low-temperature evaporator is arranged outside a refrigeration house, the high-temperature evaporator is arranged in the refrigeration house, and air is fed into the refrigeration house after being cooled by the low-temperature evaporator. And the high-temperature evaporator is in direct contact with food.

The application provides a compressor performance test system and a test method thereof, wherein the compressor performance test system comprises a to-be-tested compressor, at least two condensers, at least two calorimeters and a control unit, a temperature sensor, a pressure sensor and an electronic expansion valve are arranged between the inlet of the calorimeter and the outlet of the condenser, and the outlet of the calorimeter and the liquid reservoir are spaced apart to arrange the pressure sensor and the temperature sensor. In the compressor performance test system and the test method thereof provided in the application, two or more sets of calorimeter systems are used to simultaneously obtain refrigerating capacity of two or more evaporation sides and heating capacity of two or more condensation sides, so as to meet the performance test requirements of the compressor with multiple evaporation temperatures and multiple condensation temperatures.

The invention relates to a refrigerating system control method and device, computer equipment and a computer readable storage medium, and the method comprises the steps that in the operation stage of a refrigerating system, the target frequency of an inverter compressor is obtained according to the required refrigerating capacity of a secondary refrigerant side and the target condensation temperature and target evaporation temperature of a refrigerant side; controlling the inverter compressor to output by taking the target frequency as the current frequency, and running for a first preset duration; and when the current frequency is within the upper and lower limit range of the target frequency, the current frequency of the inverter compressor is adjusted based on the relation between the actual liquid supply temperature flowing to the evaporator from the refrigerant side and the target liquid supply temperature. The actual liquid supply temperature is close to the target liquid supply temperature so as to guarantee the temperature control effect, meanwhile, the inverter compressor can operate at the frequency matched with the temperature control working condition, the inverter compressor is prevented from operating at the high frequency all the time, power consumption of a refrigerating system and a heating system is reduced, meanwhile, temperature control through excessive dependence on the heating system can be avoided, and the energy consumption of the refrigerating system and the heating system is reduced. And the temperature control effect is ensured.

The invention relates to a refrigerant circulation system control method, a refrigerant circulation control device, a refrigerant circulation system and a storage medium, and the refrigerant circulation system control method comprises the steps that under the cold storage and refrigeration mode of the refrigerant circulation system, the actual evaporation temperature of the refrigerant circulation system is obtained; according to the difference value between the actual evaporation temperature of the refrigerant circulation system and the target evaporation temperature of the system, the total output capacity of the refrigerant circulation system is adjusted; wherein the system target evaporation temperature is the target evaporation temperature of the refrigerant circulation system. The overall output capacity of the refrigerant circulation system is adjusted based on the difference value between the actual evaporation temperature and the target evaporation temperature of the refrigerant circulation system, efficient cold storage in the valley electricity period can be utilized to the maximum extent for use in the peak electricity period, it can be guaranteed that the refrigeration effect of an indoor unit assembly meets the comfort level of a user, the overall energy efficiency ratio of the system can be increased, and the energy efficiency of the system is improved. The energy-saving heat exchange device plays a role in saving energy.

The invention discloses an intelligent positive displacement condensing unit controller which comprises a main control unit, a multi-mode sensing module, an actuator driving unit, a communication center, a self-adaptive power management system, a human-computer interaction interface and a fault prediction and health management module. The system has the advantages that all-parameter real-time monitoring can be achieved, and 12 key parameters including the exhaust temperature, the back air temperature, the environment temperature, the air outlet temperature, the condensate temperature, the evaporation temperature, the condensation temperature, the refrigeration house temperature, the compressor current / frequency, the fan rotating speed and the like can be covered; based on a fuzzy PID algorithm and a machine learning model, operation parameters are dynamically adjusted, and manual debugging is omitted; electric heating is replaced by hot gas bypass defrosting, and'defrosting with frost and no defrosting without frost 'is realized in combination with a self-learning algorithm; the requirements of the refrigeration house at the temperature ranging from-40 DEG C to + 15 DEG C are automatically recognized, and a single controller adapts to high / medium / low temperature working conditions.

The application discloses a refrigerating unit, an air conditioner and a valve control method, and relates to the technical field of refrigeration. The refrigerating unit comprises a compressor, a condenser, a supercooling assembly and an evaporator. In the technical scheme, the refrigerants in the two supercooling devices are alternately static, the refrigerant in one supercooling device is static and then gas-liquid separation is performed, the flash vapor after separation is compressed by the compressor, the liquid part flows into the evaporator to absorb heat and refrigerate, and the refrigerant in the other supercooling device is static. The refrigerant in the static state is cooled by changing the evaporation temperature of the heat exchanger, and then gas-liquid separation is performed. The refrigerant flowing into the evaporator is deeply cooled by alternating static cooling, the refrigerant in the evaporator is prevented from being cooled and heated at the same time, the refrigerating capacity of the heat exchanger is improved, and the system energy efficiency is improved.