274 results about "Evaporation temperature" patented technology

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 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.

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 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 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.

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 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.

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.

The embodiment of the invention provides an air conditioner control method, system and equipment for electric parking and a medium, and belongs to the field of vehicle air conditioners. The method comprises the steps that the requirement for the refrigerating capacity of the air conditioner is judged, the rotating speed of the electric compressor is adjusted according to the difference value between the evaporation temperature and the target temperature, when the evaporation temperature is lower than the minimum value of the target temperature, the compressor enters a low-speed protection state, and when the evaporation temperature is continuously below the basic protection temperature in the low-speed protection state, the compressor is forcibly closed. According to the environment temperature data, the time when the air conditioning system quits the icing protection state is determined; and the evaporation temperature for quitting the low-speed protection state is determined according to the difference value between the indoor temperature and the panel set temperature. The refrigerating capacity demand and heat input of the vehicle are estimated through a temperature sensor related to an air conditioning system, the rotating speed and opening and closing of an electric compressor are controlled, and the temperature control precision of the electric parking air conditioner is improved; meanwhile, by reducing unnecessary repeated starting and stopping of an air conditioner compressor, comfort is improved, system reliability is improved, and the service life of parts is prolonged.

The utility model relates to an evaporation pressure stabilizer for an organic Rankine cycle system, which comprises an evaporation cavity and a waste gas cavity, the evaporation cavity and the waste gas cavity are vertically arranged in a separated manner, the evaporation cavity is connected with a steam outlet, a pressure stabilizing system is arranged between the evaporation cavity and the steam outlet, and the evaporation cavity is filled with an organic working medium; the heat pipes are uniformly distributed in the evaporation pressure stabilizer, and each heat pipe comprises a condensation section located in the evaporation cavity and an evaporation section located in the waste gas cavity; the evaporation cavity, the waste gas cavity and the pressure stabilizing system are integrated, the structure is compact, the evaporation cavity, the waste gas cavity and the pressure stabilizing system are integrated, the evaporation cavity, the waste gas cavity and the pressure stabilizing system can be installed as a whole, the waste gas inlet is used for connecting high-temperature waste heat steam exhaust and fully utilizing waste heat, the number of the heat pipes is large, the heat pipes are evenly arranged, and heat absorption and heat release are conducted at the same time; the heat exchange efficiency is high, and the evaporation temperature can be flexibly controlled.

The present invention discloses an air conditioner cooling control method, an air conditioner and a computer-readable storage medium. When the user specifies personalized cooling requirements, the air conditioner cooling control method predicts the change curve of the target evaporation temperature over time according to the personalized cooling requirements and the actual total cooling load in the room, and then continuously tracks the change of the actual evaporation temperature during the air-conditioning refrigeration process, and adjusts the actual evaporation temperature by adjusting the compressor operating frequency according to the change curve, so that the actual change trend of the actual evaporation temperature can approximate the change curve, thereby enabling the indoor temperature to meet the cooling requirements, avoiding the disadvantages of roughly setting the target evaporation temperature, resulting in over-regulation of the room temperature and large fluctuations, and thus achieving the effect of precise temperature control to meet the user's personalized cooling requirements.

The invention discloses an air conditioner and a control method thereof, and belongs to the technical field of air treatment. The air conditioner comprises a shell provided with a side air return opening and a lower air return opening; when the air port cover plate covers the lower air return port, the air inlet form of the air conditioner is side air return; when the air port cover plate covers the side air return port, the air inlet form of the air conditioner is lower air return; the control method comprises the steps that in a refrigeration mode, a fan is controlled to operate according to the side return air speed, and the actual evaporation temperature is obtained; if the actual evaporation temperature is smaller than the preset evaporation temperature, a lower return air inlet form is recognized, and a fan is controlled to operate according to the lower return air speed; otherwise, a side air return air inlet mode is adopted; in the heating mode, a fan is controlled to operate according to the side return air speed, and the actual condensation temperature is obtained; if the actual condensation temperature is larger than the preset condensation temperature, a lower air return air inlet form is recognized; wherein under the same wind gear, the lower air return speed is lower than the side air return speed. According to the air conditioner and the control method, noise generated during air return can be reduced.

The application relates to the air conditioning technical field, and particularly provides an air conditioning system and a control method thereof, and aims to solve the problem of how to ensure the heating effect of the air conditioner under the condition of air conditioner frequency reduction operation. For the purpose, the air conditioning system is provided with a phase change material, and a heat storage channel and a heat exchange channel which are not communicated with each other in a heat storage device, the heat storage channel and the heat exchange device form a heat storage loop, so that the first refrigerant in the heat exchange device can exchange heat with the first refrigerant in the heat storage channel, and then the heat generated by the driving mechanism can be stored in the phase change material. The two ends of the heat exchange channel are arranged on the inlet side of the evaporator, thereby forming a heat exchange branch, so that the second refrigerant enters the heat exchange branch before entering the evaporator, the second refrigerant in the heat exchange branch can absorb the heat released by the phase change material, the temperature of the second refrigerant is increased, thereby the evaporation temperature of the evaporator is increased, so that the air conditioner can still ensure the heating effect under the condition of frequency reduction operation.

The invention relates to an air conditioner, particularly provides a gas-liquid separator, an air conditioner and a control method of the air conditioner, and aims to solve the problem of liquid impact of a compressor caused by excessive accumulation of a liquid refrigerant in a gas-liquid separator of an existing air conditioner. In order to achieve the purpose, the gas-liquid separator of the air conditioner comprises a cavity, a heating device and at least one temperature sensor, and the heating device is used for heating liquid in the cavity; the temperature sensors are arranged in the cavity and located above the target liquid level of the cavity so that when the temperature detected by at least one temperature sensor is smaller than the evaporation temperature, the liquid level in the cavity can be located below the target liquid level through heating of the heating device. When the temperature detected by the temperature sensor is smaller than the evaporation temperature, it is proved that the liquid in the gas-liquid separator is too much, at the moment, the heating device needs to be started to enable the liquid in the cavity to be below the target liquid level, and therefore the compressor is prevented from generating liquid impact.

The invention discloses a control method of a variable air volume ventilation air conditioner and an air conditioning system, and relates to the technical field of heating and ventilation control. According to the control method, the real-time evaporation temperature of the refrigerant is collected, the target evaporation temperature is updated, the total load, the real-time evaporation temperature and the target evaporation temperature are input into the load controller, the rotating speed error of the compressor is calculated, then the real-time current and the rotating speed error are input into the rotating speed controller, and the input current of the compressor is updated. In the control process of the variable air volume ventilation air conditioner, the feed-forward control part of the load controller is continuously updated. The feed-forward control part updated in real time comprises the magnetic resistance change of the compressor, the driving error is calculated when the compressor is dormant, the magnetic resistance coefficient of the rotating speed controller is updated, and the feed-forward control part is initialized according to the updated magnetic resistance coefficient, so that the control precision of the air conditioner compressor is improved.

This application relates to a refrigeration equipment and its dual-stage gas supply regulation method and apparatus. The method includes: acquiring the exhaust superheat and terminal temperature difference of the refrigeration equipment, wherein the exhaust superheat is the difference between the exhaust temperature and the saturated condensing temperature of the refrigeration equipment, and the terminal temperature difference is the difference between the chilled water outlet temperature and the saturated evaporating temperature of the refrigeration equipment; when the terminal temperature difference is greater than or equal to a first threshold, controlling a first gas supply electric valve and a second gas supply electric valve of the refrigeration equipment according to the temperature range of the exhaust superheat, wherein the first gas supply electric valve is configured at the connection between the condenser and the flash evaporator of the refrigeration equipment, and the second gas supply electric valve is configured at the connection between the condenser and the suction port of the refrigeration equipment. This application solves the technical problem of unstable unit operation during control of a dual-stage gas supply structure.

The invention belongs to the technical field of heat pump drying, and particularly relates to a heat pump drying system and a control method.The heat pump drying system comprises a compressor, two evaporators, two condensers, two throttling devices and a drying air channel, and in the drying air channel, the double condensers are arranged on the downstream of the air flowing direction of the double evaporators; the double evaporators are arranged in the drying air channel in parallel to form stepped cooling and dehumidification, and the double condensers are arranged in the drying air channel in parallel to form stepped heating. According to the heat pump drying system, rapid temperature rising, deep dehumidification in the middle stage and stable temperature rising in the later stage are achieved in the early stage of drying, the dehumidification efficiency and the drying speed of the whole drying process are improved, particularly, the high dehumidification amount can still be kept in the later stage of drying, and the problems that a traditional heat pump drying system is single in evaporation temperature, insufficient in dehumidification capacity and low in drying efficiency are solved.

This application relates to the field of drying technology, disclosing a method for controlling a heat pump unit, comprising: acquiring the evaporation temperature of the evaporator when the heat pump unit is operating in dehumidification mode; determining a target dehumidification mode for the heat pump unit based on the evaporation temperature; and controlling the on / off states of the exhaust valve, the fresh air valve, and the bypass ventilation valve based on the target dehumidification mode. The evaporation temperature can be used to determine the dehumidification capacity of the evaporator, i.e., whether the evaporator can perform normal dehumidification. This allows the dehumidification mode of the heat pump unit to be matched with the dehumidification capacity of the evaporator, thereby improving the accuracy of the heat pump unit in regulating the humidity of the drying room. This application also discloses a device for controlling a heat pump unit, a heat pump unit, and a storage medium.

Provided is a thermal cycling system including: a working medium; a compressor; a condenser; a pressure reducing device; and an evaporator, in which the working medium includes HFO-1123, HFO-1234yf, and R290, in a case in which a content of the R290 is defined as A mass % and a content of the HFO-1123 is defined as B mass %, the A and the B satisfy Equation (1) and Equation (2) below, a total content of the HFO-1123, the HFO-1234yf, the R290 is 99.0 mass % or more with respect to a total amount of the working medium, the evaporator is controlled such that an evaporation temperature of the working medium is −45° C. or higher, Equation (1) is −1.6433×A+38.1000≤B≤0.0136×A2−0.8364×A+61.0167, and Equation (2) is 2.0≤A≤9.0.

Embodiments of the present application disclose a pre-ignition suppression method, device, medium and equipment for an engine. The pre-ignition suppression method for the engine obtains the current operating condition parameters of the engine. If the current operating condition parameters indicate that the engine is operating in a preset pre-ignition sensitive region, it obtains the actual temperature parameter of the cylinder and the evaporation temperature parameter corresponding to the fuel in the cylinder, and then controls the cooler to work based on the actual temperature parameter so that the cylinder reaches the evaporation temperature parameter, thereby changing the storage environment of the mixed liquid droplets in the cylinder, enabling the specified liquid in the mixed liquid droplets to evaporate and separate from the mixed liquid droplets, and the remaining droplets cannot auto-ignite, thus eliminating the occurrence conditions of pre-ignition from the root and minimizing the pre-ignition risk to the greatest extent.

The utility model relates to a kind of high-speed motor cooling device based on annular unpowered heat pipe, it includes compressor and the cooling mechanism being set in the exterior of compressor, the cooling mechanism includes with the exhaust pipe and reflux pipe being connected with the compressor shell, the connecting position of the exhaust pipe and reflux pipe with the compressor shell is respectively located the both sides of stator in axial direction, the compressor shell inner wall is provided with the venturi injection pipe being connected with the reflux pipe, the outer end of the exhaust pipe and reflux pipe is connected with condensing component.The high-speed motor cooling device, it is directly set on the compressor shell, the magnetic suspension motor and magnetic bearing cooling in the compressor shell interior, independent of heat pump refrigerant circulation, can realize motor internal evaporation temperature lower than the motor temperature control of high-temperature heat pump system evaporation temperature.On the basis of guaranteeing motor safety, motor coil and rotor temperature are greatly reduced, prolong motor life, improve motor efficiency.