107 results about "Inverter compressor" patented technology

The invention relates to the technical field of refrigeration house unit control, in particular to a frequency conversion-fixed frequency refrigeration house unit control method based on cooperative control. The method comprises the following steps: establishing a control basis through system initialization and parameter setting, acquiring multi-dimensional data such as temperature in a library, compressor current and door state, and packaging the multi-dimensional data into a system real-time state data packet; performing verification filtering processing on the acquired data to generate a filtering temperature value and a safety state identifier; the real-time temperature difference and the change trend are analyzed based on the temperature data, the load state is determined through a load evaluation model, an inverter compressor independent operation mode or a variable frequency-fixed frequency compressor cooperative operation mode is intelligently selected, and operation parameters are dynamically optimized; and corresponding energy-saving and protection strategies including condensation fan adjustment, heat recovery management, door state linkage control and time-of-use electricity price response are executed according to the operation mode. According to the control method, the defects of a traditional control method in the aspects of energy efficiency and stability are overcome, and intelligent management and energy-saving optimization of the refrigeration house unit are achieved.

The invention discloses a refrigeration control method based on inverter compressor control, which relates to the technical field of refrigeration equipment control, and comprises the following steps: acquiring operation data of a refrigeration system according to a preset period, and extracting a thermal response characteristic representing a cooling rate attenuation acceleration by performing differential processing on an indoor temperature; and calculating a thermal rebound sensitivity characteristic by combining the frequency change gradient. A thermal inertia potential energy index representing the heat storage load of the enclosure structure is generated through time domain accumulation processing, a nonlinear drift modulation model is constructed accordingly, and a virtual set temperature and a dynamic frequency lower limit value are generated. And finally calculating a basic adjusting frequency based on the virtual set temperature, and selecting the maximum value of the basic adjusting frequency and the lower limit value of the dynamic frequency as a target driving frequency. Through cooperation of algorithm soft traction and physical hard lifting, the problem of overshoot oscillation in a complex thermal environment is solved, and temperature control stability and energy saving performance are improved.

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 air source heat pump steam engines, in particular to an efficient and environment-friendly air source heat pump steam engine and application of the efficient and environment-friendly air source heat pump steam engine. A steam outlet of a gradient type liquid separation evaporator communicates with a gas-liquid separation tank and a first steam inlet of an inverter compressor through a four-way valve, and a monitoring assembly is arranged between the inverter compressor and the four-way valve; the variable-frequency compressor is communicated with the double-flow-channel condenser, the double-flow-channel condenser is communicated with the liquid storage device, the liquid storage device is communicated with the flash tank type economizer through the two-stage throttling assembly, the top of the flash tank type economizer is communicated with a steam supplementing opening of the variable-frequency compressor, and the flash tank type economizer is communicated with the gradient type liquid separation evaporator through the two-stage throttling assembly. The gradient type liquid separation evaporator is provided with a low-temperature auxiliary assembly. By the adoption of the structure, air serves as a heat source, zero pollutant emission is achieved, the frequency of the inverter compressor is dynamically adjusted according to loads, high efficiency and energy saving are achieved, the operation cost is reduced, and requirements of multiple fields such as textile printing and dyeing, food processing, chemical and medicine and agricultural greenhouse heating are met.

A compact freezer unit for supplying conditioned air to the interior of a structure is provided herein. The compact freezer unit includes a housing containing one or more components of the freezer unit, the housing having dimensions of height, width, and depth. The components include an evaporator comprising one or more coils and an evaporator fan, a condenser and a condenser fan, a Direct Current (DC) Enhanced Vapor Injection (EVI) inverter compressor, an economizer for separating liquid and vapor refrigerant, a 4-way valve and a chassis belt electric heater configured to defrost one or more surfaces, one or more sensors for sensing a condition and generating an output signal received by a controller, and a plurality of refrigerant lines fluidly connecting the condenser and the evaporator.

The invention belongs to the technical field of oil gas recovery, and discloses an ultralow-temperature condensation and ultralow-emission oil gas recovery system and method.A component self-adaptive gradient matching mixed working medium is adopted to be matched with a single-stage inverter compressor, oil gas component online detection and an AI algorithm are combined, the working medium ratio can be dynamically adjusted so as to accurately meet the refrigeration requirements of oil gas with different components, and the oil gas recovery efficiency is improved. A complicated cascade refrigeration structure is not needed, so that the operation stability is improved while the system is simplified; due to the design of the integrated composite heat exchanger, the heat exchange structure is optimized, the cold energy loss is reduced, the heat exchange efficiency is improved, a stable ultralow-temperature cold source is provided for oil-gas deep condensation separation, and oil-gas deep separation is guaranteed from the refrigeration end; the pre-separation module integrates multiple pretreatment functions, strictly controls the cleanliness of oil gas through a secondary pretreatment mechanism, removes impurities in the oil gas, prevents the impurities from blocking, abrading and other influences on the system in an ultralow-temperature environment, and guarantees continuous operation of the system.

The invention discloses a double-sensing segmented frequency conversion control method and device for an ultralow-temperature refrigerator. The method comprises the steps that the environment temperature and the temperature in a box are collected, staged rotating speed control is conducted on an inverter compressor in the first-time power-on or cold start stage, and the compressor is made to be increased to the preset target rotating speed from the start rotating speed step by step; in the operation stage, the rotating speed adjusting amount is determined according to the temperature deviation between the temperature in the box and the target temperature and the change trend of the temperature deviation, and a rotating speed instruction is generated by dynamically correcting the control parameters; and in the operation cycle formed by starting and stopping of the compressor, the starting rotating speed and / or the operation rotating speed upper limit of the next operation cycle is updated according to the comparison result of the actual operation duration and the preset operation duration. The output capacity of the compressor can be matched with load change, starting impact is reduced, temperature control stability is improved, and energy consumption is optimized.

This application discloses a dual high-efficiency dual-frequency conversion air source heat pump unit and its temperature control system. The dual high-efficiency dual-frequency conversion air source heat pump unit includes a shell-and-tube heat exchanger, a first working system, and a second working system. The shell-and-tube heat exchanger includes a first opening, a second opening, and a third opening, with the third opening used to connect to the indoor working water pipe. The first working system includes a variable frequency compressor, a four-way reversing valve, a variable frequency fan, a first sub-circuit, a second sub-circuit, and a third branch. The first sub-circuit is connected sequentially from the first opening to the condenser interface, exhaust interface, and outlet of the four-way reversing valve and the variable frequency compressor. The third branch is connected in parallel with the main heating electronic expansion valve and includes a one-way valve and an auxiliary cooling electronic expansion valve, with the valve port diameter of the auxiliary cooling electronic expansion valve being larger than that of the main heating electronic expansion valve. The variable frequency fan is configured to blow airflow at ambient temperature onto the finned heat exchanger. The second working system has the same structure as the first working system.

The invention relates to the technical field of intelligent equipment, and discloses a method, device and equipment for controlling a compressor of refrigeration equipment and a storage medium. The refrigeration equipment comprises a refrigeration chamber and a freezing chamber, and the method comprises the steps that under the condition that a compressor is in a running state, the first current refrigeration temperature of the refrigeration chamber is obtained; under the condition that the first current refrigeration temperature is larger than or equal to the starting temperature, a compressor is controlled to conduct refrigeration operation on a refrigeration chamber; and under the condition that the first current refrigeration temperature is smaller than or equal to the shutdown temperature, the compressor is controlled to conduct refrigeration operation on the freezing chamber. Therefore, the variable-frequency compressor can perform refrigeration operation by switching different chambers without shutdown for a long time, non-shutdown energy-saving control of the variable-frequency compressor is realized, and resources are saved.

The embodiment of the present application discloses a kind of test chamber cooling control method and test chamber, cooling control method includes: the set parameter of test chamber is divided into set quantity of segment by average;The reference increment of each set parameter in each segment is calculated;The target control value of each set parameter in different segment is determined based on each reference increment and the control gain coefficient of each set parameter;Based on the target control value of each set parameter in different segment, each set parameter in corresponding segment is regulated and controlled, to control test chamber to carry out cooling.This application solves the technical problem that the existing environment test chamber only relies on the maximum refrigeration capacity to select the fixed frequency compressor, the fixed frequency compressor has higher energy consumption, and the capacity is wasted in the initial stage of operation, realizes the technical effect of regulating and controlling each set parameter including variable frequency compressor speed in different time periods and high precision, improves the reliability of test chamber operation, and reduces the operation energy consumption of test chamber.

The application provides a control method of a refrigeration system, comprising: when powered on, determining whether the ambient temperature Th fluctuates when the first preset condition or the second preset condition is met; if not, controlling the frequency of the variable frequency compressor to decrease by △F1; wherein the first preset condition is that the exhaust pressure P at the exhaust port of the variable frequency compressor fluctuates twice within t1 time from the starting moment; the second preset condition is that P accumulatively fluctuates three times within t2 time from the starting moment; t1 < t2; the fluctuation range of the exhaust pressure P is P > P0 + △P or P < P0 - △P, P0 is the exhaust pressure value at the starting moment, and △P = 0.1-0.3 MPa; the fluctuation range of the ambient temperature Th is Th > Th0 + 2 DEG C or Th < Th0 - 2 DEG C, Th0 is the ambient temperature at the starting moment, and the control method is simple and convenient, and the variable frequency compressor can be controlled to operate in a stable state.

The invention provides a refrigerator and a control method thereof, and belongs to the technical field of household appliances. According to the method, the starting operation frequency of the inverter compressor in the current starting and stopping period is determined according to the environment temperature detected by the temperature sensor and the starting rate of the last starting and stopping period, and then the adjustment amplitude of the operation frequency of the inverter compressor is determined based on the environment temperature. And the inverter compressor is controlled to operate at the starting operation frequency, and the operation frequency of the inverter compressor is adjusted according to the adjustment amplitude every preset time until the operation frequency of the inverter compressor reaches the upper limit value of the operation protection frequency or the inverter compressor is shut down. Therefore, the operation frequency of the inverter compressor is comprehensively adjusted according to the environment temperature obtained through real-time detection and the starting rate of the last starting and stopping period, so that the operation frequency of the inverter compressor can correspondingly change along with the difference of the environment temperature and the starting rate of the last starting and stopping period. Therefore, the inverter compressor can achieve better working efficiency.

The utility model relates to a passenger near-body cooling device, which is characterized in that exhaust gas of a miniature direct-current variable-frequency compressor is connected with return gas through an air-cooled condenser and a first heat stroke of a micro-channel evaporator, and a load is connected with the micro-channel evaporator through a liquid return pipe and a liquid supply pipe; a liquid return valve, a liquid return temperature sensor, a liquid return pressure sensor, a liquid return flowmeter, an electric heater, a buffer tank, an expansion tank, a liquid return dew point temperature sensor, a liquid return booster pump and a liquid return filter are sequentially arranged on the liquid return pipe, and then the liquid return pipe is divided into two paths, the other path is connected with a direct-cooling condenser through a direct-cooling electromagnetic valve, and is connected to the other hot stroke outlet of the micro-channel evaporator through a direct-cooling one-way valve to be connected with a liquid supply pipe; a branch liquid pipe is branched from the liquid return pipe and is connected with the upper end of the water tank, and a conductivity sensor is arranged in the water tank; the load is a seat cushion and / or a back cushion and / or a side baffle which can be wholly or partially filled with water. The device stably and safely cools the near body of the driver and passengers.

This invention provides a rotor core, a permanent magnet motor, and a variable frequency compressor, relating to the field of motor and compressor design and manufacturing technology. The rotor core includes uniformly distributed permanent magnet slots, with grooves between adjacent slots. Each groove extends inward along the radial direction of the rotor core, and a parallel magnetic bridge is provided between the groove and the slot. Symmetrically distributed first, second, and third magnetic barrier slots are provided on both sides of the top of each slot. The outer side of the rotor core above the magnetic barrier slots includes a first and second circular arc, with the second arc intersecting the side of the groove. Permanent magnets with alternating magnetic properties are embedded in each slot. In this invention, the outer radius Rr of the rotor core, the distance ho from the midpoint of the bottom of the permanent magnet slot to the center point of the rotor core, and the thickness hm of the permanent magnet satisfy 2 < (Rr - ho) / hm ≤ 3.4. Furthermore, by reasonably setting the position and size of the magnetic barrier slots, the magnetic circuit distribution can be changed, leakage flux reduced, the power density of the motor increased, and the electromagnetic vibration noise of the motor and compressor reduced.

The invention provides an inverter compressor input voltage compensation method and device. The method comprises the following steps: acquiring a rear-end line voltage of an electric reactor, a phase voltage of a compressor, a phase current of the compressor and an angular speed of a motor in real time; analyzing the phase voltage and the phase current by adopting fast Fourier transform to obtain a power factor of the compressor side; calculating characteristic parameters for voltage compensation calculation based on the rear-end line voltage, the phase voltage, the phase current, the power factor and the motor angular velocity; according to the phase voltage and the phase current, indexing a characteristic coefficient in a predefined current-voltage partition coefficient table; and calculating a compensation voltage based on the characteristic parameter, the characteristic coefficient and the back-end line voltage. According to the invention, the influence of a compressor side power factor on voltage compensation is eliminated by adopting a mode of fast Fourier transform and a power conservation model, a current sensor at the rear end of an electric reactor is omitted, and compensation is realized only by utilizing an existing sampling circuit of a driver.

The application relates to the technical field of heat pump control, and discloses an air source heat pump variable parameter defrosting control method based on visual recognition technology, which comprises the following steps: acquiring an outdoor heat exchanger image and temperature data; extracting macroscopic coverage representing a frost accumulation area and microscopic characteristic parameters representing physical properties of a frost layer; calculating a thermal attenuation index, determining a correction factor based on the deviation of the index and the macroscopic coverage, and calculating a target defrosting heat load in combination with the microscopic characteristic parameters; determining a target operating frequency of a variable frequency compressor and a target opening degree of an electronic expansion valve according to the target defrosting heat load, and executing defrosting; and monitoring the macroscopic coverage and the coil temperature in real time, and exiting defrosting when the visual readiness and the thermal readiness conditions are simultaneously met. The application realizes accurate prediction of defrosting heat load and on-demand defrosting by introducing a correction factor to compensate for a visual blind area, and solves the problems of incomplete defrosting and low energy efficiency.

A heating, ventilation, and air conditioning system for adjusting the indoor temperature of a structure connected to an electric utility grid includes: an energy storage system; an inverter heat pump including a variable speed compressor controlled by an inverter to operate over a range of 0% to 100% of a maximum compressor speed, the inverter heat pump being electrically connected to the energy storage system and the electric utility grid; and a home energy management system (HEMS) including a controller operatively connected to the inverter heat pump, the controller being programmed to receive inputs comprising at least one of an indoor temperature measurement, a user-determined temperature setpoint, an indoor humidity measurement, or a user-determined humidity setpoint and set a compressor speed of the inverter heat pump in response to the inputs, the HEMS controlling whether the variable speed compressor is powered by electric utility grid or the energy storage system.

This invention provides a control method for a refrigeration device and the refrigeration device itself. The control method includes: acquiring the highest temperature Tg and the lowest temperature Td of the refrigeration chamber within one cycle of the initial operating phase of the variable frequency compressor; determining that the difference between the highest temperature Tg and the lowest temperature Td is greater than a first preset threshold Tp, then controlling the variable frequency compressor to execute a frequency adjustment program and obtain the adjusted operating frequency Fb; then controlling the variable frequency compressor to execute a trial run program at Fb, obtaining the first running time t1 and the shutdown time t of the variable frequency compressor; then controlling the variable frequency compressor to execute a normal operation program, in which the variable frequency compressor is controlled to execute the operating phase at the operating frequency Fb and the first running time t1, and then the variable frequency compressor is stopped and remains stopped for a duration t to execute the shutdown phase. Through the above control method, the refrigeration device automatically adjusts the operating frequency of the variable frequency compressor, reducing temperature fluctuations within the refrigeration chamber and improving the user experience.

The present application relates to energy-saving air conditioner and heat pump control technical field, disclose a kind of based on air source heat pump's intelligent heating system and control method, the system includes solar energy heat collection subsystem, air source heat pump unit, flow switching device, sensor network and main controller.Based on sensor data, main controller calculates source end heat flow decay rate and load side heat capacity lag integral;When source end heat flow decay rate meets trigger condition, control flow switching device and solar energy heat collection side medium are introduced into heat pump auxiliary heat exchange side as low-grade auxiliary heat source;At the same time, according to the cooperative constraint of source end heat flow decay rate and load side heat capacity lag integral, calculate initial start frequency instruction drive variable frequency compressor to execute heat compensation.The present application overcomes the hysteresis of conventional temperature feedback control through feedforward determination and multivariable cooperative control, suppresses the invalid high-frequency start of variable frequency compressor during operating condition transition period, widens the operating boundary and reduces system energy consumption.

The application provides a frequency control method and device of a variable frequency compressor and a variable frequency air conditioner; the method comprises the following steps: obtaining the current value of the compressor at preset intervals during the frequency increasing process of the compressor; calculating the current difference value according to the current value and a preset current limit value; calculating the current change rate according to the current value and the preset interval; determining the frequency change amount of the compressor according to the current difference value and the current change rate; adjusting the frequency of the compressor according to the frequency change amount and controlling the compressor to operate at the adjusted frequency. In this way, the frequency change amount of the compressor is automatically determined according to the current difference value between the current value of the compressor and the current limit value and the current change rate, so as to adjust the operating frequency of the compressor according to the frequency change amount, thereby avoiding the problem that the variable frequency air conditioner stops operating due to the overcurrent protection of the compressor, ensuring the stable operation of the variable frequency air conditioner and improving the comfort experience of the user.

The invention belongs to the technical field of electric appliances, and particularly relates to a control method, device and equipment for an inverter compressor and a storage medium, the inverter compressor is controlled to be started based on a positioning current parameter by determining the positioning current parameter when the inverter compressor is started, and under the condition that the inverter compressor fails to be started, the inverter compressor is controlled to be started. Adjusting the positioning current parameter, controlling the inverter compressor to start again based on the adjusted positioning current parameter, and repeatedly executing the step until the inverter compressor is successfully started, or until the starting frequency reaches a preset frequency, or until the positioning current parameter reaches a preset value; according to the method, the problem of starting failure is effectively solved, and the starting success rate and the operation stability of the inverter compressor under the complex working condition are remarkably improved.

The utility model discloses a variable-frequency compressor control system and refrigeration equipment, the variable-frequency compressor control system comprises a variable-frequency controller, a first electric control switch, a first control unit and a second control unit, the variable-frequency controller is used for being connected with a variable-frequency compressor, and the variable-frequency controller comprises a power port; the first electric control switch comprises a first switch part and a first controlled part, and the first switch part is connected between the power supply port and a power supply; the first control unit comprises a first power supply end, a second power supply end, a voltage output end, a first control end and a switching circuit, the voltage output end is connected with the first controlled part, and the switching circuit is communicated with the first power supply end and the voltage output end in a first state and is communicated with the second power supply end and the voltage output end in a second state; the first control end is used for controlling the state switching of the switching circuit; and the second control unit is connected to the first controlled part and is used for controlling the on-off of the first controlled part so as to control the on-off of the first switch part. Therefore, the energy consumption of the variable frequency controller can be reduced.

The invention discloses an air conditioner which comprises a controller, at least one control item is preset in the controller, and a first target value is set; the system also comprises at least one control item detection unit which is connected with the controller, detects the real-time parameters of the control items in real time, and transmits the real-time parameters to the controller. The control system further comprises at least one driving part which is a frequency conversion compressor and / or an expansion valve, is connected with the controller and is controlled by the controller to change driving parameters of the driving part so that the real-time parameters of the control items can be increased or decreased. The controller is configured to circularly obtain and store the real-time parameters; acquiring a current difference value which is a difference value between the first target value and the real-time parameter; acquiring a historical difference value which is a difference value between the real-time parameter and a historical parameter; the historical parameters are obtained from the real-time parameters before the current real-time parameters; and controlling the driving piece according to the current difference value and the historical difference value. And through predictive control, overshoot is reduced, and comfort is improved.

The application provides a kind of permanent magnet motor and scroll type variable frequency compressor, it is related to scroll compressor design and manufacturing technical field, permanent magnet motor includes stator core and rotor core;Stator core includes the stator tooth and stator yoke that are evenly distributed along circumference, the outside of stator yoke at the top of stator tooth is equipped with fluid passage, two adjacent stator teeth and the stator yoke between two stator teeth are equipped with stator slot, and multiple strands of conductive round enameled wire are embedded in each stator slot;The outside of rotor core is composed of straight line segment and circular arc, the inside of rotor core is equipped with air slot, and the air slot and the outside straight line segment of rotor core form non-uniform magnetic bridge, there is a certain distance between two adjacent air slots, parallel magnetic conducting rib is formed, the air slot is embedded with permanent magnet, the magnetic field direction of which alternately changes, rivet hole, weight-reducing hole and shaft hole are arranged close to the inside of rotor core.The proportional coefficient Ks defined in the application is kept in reasonable range, which can increase the power density of motor, reduce cost and improve efficiency.

The invention relates to an ice maker control method and device and an ice maker. The method comprises the steps that the environment temperature is obtained in real time; the power of an inverter compressor is adjusted according to the environment temperature, so that the water temperature in a water storage box is reduced; after the water temperature in the water storage box is reduced to a first temperature, the power of the inverter compressor is adjusted in each ice-making stage according to the environment temperature and the temperature of the evaporator of the ice-making machine in multiple ice-making stages, so that the heat exchange temperature difference of the evaporator of the ice-making machine is within a preset temperature range until ice-making is finished; wherein the first temperature is greater than zero DEG C. The transparency of ice blocks can be guaranteed, the ice making efficiency is improved, and energy consumption is reduced.

The present application relates to the technical field of variable frequency compressor control, in order to realize the over-temperature protection of the motor of the variable frequency compressor, a kind of over-temperature protection method of variable frequency compressor is provided, comprising: step 1, the motor winding temperature T2 is detected in real time during the operation of variable frequency compressor;Step 2, judge whether the motor winding temperature T2 is greater than or equal to the maximum allowable operating temperature T of motor MAX , if yes, then enter step 3, if no, then the variable frequency compressor is normally operated according to the current state;Step 3, obtain the current speed n1 of variable frequency compressor, and judge whether n1 is greater than the rated speed n r of variable frequency compressor, if yes, then control the variable frequency compressor to reduce speed, and run according to η×n r , wherein η is proportional constant, and 1≥η>0;If no, then control the variable frequency compressor to stop running. The above steps can realize the over-temperature protection of the motor of the variable frequency compressor.

The utility model discloses an anti-ice-blockage high-efficiency freezing dryer which comprises a heat exchanger, a heat exchange area is arranged in the heat exchanger, and an air channel opening is formed in the heat exchange area. The air channel port is connected with an input port of the frequency conversion compressor through a first pipeline and connected with an output port of the frequency conversion compressor and the condensation assembly through a second pipeline, and the temperature detection module is arranged in the heat exchange area of the heat exchanger, so that the temperature of the heat exchange area is monitored in real time. When the temperature detection module judges that the temperature of the heat exchange area is reduced to 0 DEG C or below (namely, the temperature is too low, and the freezing risk exists), the control module can automatically start an adjusting mechanism. Warm gas and condensate are mixed and then input into the heat exchange area, the temperature of the heat exchange area is increased, the temperature is prevented from being too low, and the icing phenomenon is avoided. And it is ensured that the temperature of the heat exchange area is kept within a reasonable range, ice blockage is avoided, an accurate adjusting mechanism is formed, icing is prevented, and the ice blockage phenomenon can be rapidly treated.

The utility model provides an air energy device with a built-in phase change energy accumulator, which relates to the technical field of new energy and energy conservation and environmental protection, and comprises an inverter compressor, a phase change energy accumulator, a phase change energy accumulator and a phase change energy accumulator, the condenser is connected with the inverter compressor, condenses the high-temperature and high-pressure gaseous refrigerant into a liquid refrigerant and releases heat; the phase change energy storage device is connected with the condenser and receives and stores the heat released by the condenser; and the liquid storage tank is connected with the condenser and is used for storing a liquid refrigerant. The utility model can reduce the installation volume, reduce the installation and maintenance cost, provide defrosting energy for air energy equipment, save the electricity consumption during defrosting, and promote the popularization and application of clean energy.

The invention discloses a refrigerator and a control method of the refrigerator, and relates to the technical field of refrigerators, the refrigerator comprises an inverter compressor configured to adjust the operation rotating speed of the inverter compressor in response to a control instruction of a controller; the controller is configured to generate an update flag bit when the first time length is greater than the first preset time length if the update flag bit of the optimal rotating speed is not detected during startup operation aiming at any startup period when the inverter compressor is not powered on for the first time; during startup operation, if the update flag bit is detected, and the first startup period and the second startup period are adjacent startup periods, the operation rotating speed is controlled according to the second operation duration of the inverter compressor; and during startup operation, if the update flag bit is detected and the first startup period and the second startup period are not adjacent startup periods, updating the optimal rotating speed according to the first startup rate, and deleting the update flag bit. By means of the refrigerator, the rotating speed adaptability and the long-term operation performance of the refrigerator can be improved.