51results about How to "Fulfill cooling needs" patented technology

The invention discloses a temperature controlled focal plane detector mechanism, which mainly solves the problem that the conventional focal plane detector mechanism cannot work under different temperature conditions. The temperature controlled focal plane detector mechanism comprises a shell, a cabinet, a detector and a detector mounting base, wherein the detector mounting base comprises a detector support plate and a cold plate; the detector support plate is fixedly connected with the cabinet; the detector is arranged on one side of the cold plate, and is provided with a temperature test sensor; the other side of the cold plate is provided with a refrigerator of which the side far from the cold plate is provided with a heat conducting device; and the heat conducting device and the cold plate isolate and seal the refrigerator. The temperature controlled focal plane detector mechanism can meet the requirements of different working temperatures of the detector; and the detector is not influenced by frosting and pollution when working in various environments (laboratories or space environments), and the environmental heat leak is effectively reduced.

The invention provides a vehicle-mounted battery pack heat management system which comprises a battery heat exchange system and an air-conditioner heat exchange system, wherein the battery heat exchange system comprises a circulating pump, a heat exchanger and a battery pack; the battery pack, the circulating pump and the heat exchanger are connected through a circulating pipeline containing a heat exchange liquid inside; a switch valve is arranged between the circulating pump and the heat exchanger; and the air-conditioner heat exchange system comprises a compressor, a radiator A and a radiator B which are connected through a circulating pipeline containing an air conditioner cooling medium inside. The vehicle-mounted battery pack heat management system is formed only by modifying an original air conditioner system, so that the vehicle-mounted battery pack heat management system is simple in structure and convenient to implement; and when the heating capacity of the battery pack is not strong, the vehicle-mounted battery pack heat management system can satisfy the radiation demand of the battery pack only by utilizing the original components in the air conditioner, thereby lowering the energy consumption and protecting the environment.

The invention provides a compressor refrigeration system and method of an electric automobile, and the system comprises a control device, a compressor refrigeration unit, an air conditioning unit, a battery cooling unit, an in-automobile temperature sensor, and a battery pack temperature sensor. The control device controls opening / closing of the mechanical expansion valve according to the temperature in the passenger compartment and controls the opening degree of the electronic expansion valve according to the temperature of the battery pack. The method comprises the steps: determining the working condition and the total refrigerating capacity requirement of the electric vehicle; and determining the refrigeration priority of the passenger compartment and the battery pack, and controlling the opening degree of the electronic expansion valve of the battery cooling unit, the rotating speed of a water pump and / or the rotating speed of an air blower of an air conditioning unit of the electric automobile according to the refrigeration priority, the temperature of the battery pack of the electric automobile and the total refrigerating capacity requirement. According to the scheme, openingand closing are achieved through the mechanical expansion valve, and the opening degree of the electronic expansion valve is adjustable, so that the requirements for air conditioner refrigeration andbattery refrigeration are effectively met while the design cost is reduced and the endurance mileage of the electric automobile is guaranteed.

The invention discloses a server fan control method and system based on configuration of different types of board cards and belongs to the technical field of server cooling technologies. According to the server fan control method and system based on configuration of different types of the board cards, fan control programs for configuration of different types of the board cards are integrated in a BMC, and the different fan control programs correspond to different control temperature points and fan rotation speeds; and communication connection of the BMC and a BIOS is built, related information of the board cards in the BIOS is obtained by the BMC, and the different fan control programs are automatically called according to the related information of the board cards collected by the BMC, so that different cooling control manners are enabled, and the control over the working state of a fan is completed. According to the server fan control method and system based on the configuration of different types of the board cards, the rotation speed of the fan can be optimized, the cooling performance of a server is guaranteed, the noise of the server can be lowered effectively, and the server fan control method and system have the good application and popularization value.

The invention provides an application method and an application system of a multifunctional cooling tower. The application system of the multifunctional cooling tower is characterized in that the application system can provide a natural cold source and / or a water cooling mechanical cold source; refrigeration equipment, a three-way valve I, an inner circulation system of a closed cooling tower, a system pressure stabilization and water replenishing device, a circulating pump, a three-way valve II and a water chiller are orderly communicated by pipes and form a first loop; and the water chiller, a three-way valve III, a spray pump and an outer circulation system of the closed cooling tower are orderly communicated by pipes and form a second loop. The application system and the application method of the multifunctional cooling tower can provide natural cold source states and flexibly select cold source taking ways according to temperatures of an inlet and an outlet of the refrigeration equipment and a natural environment, realize that the closed cooling tower has functions of the existing closed cooling tower and the existing open cooling tower, avoid utilization of an open cooling tower, reduce a cost and energy consumption, save energy and a floor space, reduce installation and maintenance time, improve reliability and prolong a service life of the whole application system.

The invention provides a folding general case for electronic devices. The general case for the electronic devices which are LRUs (line replaceable units) can be used for various military and civil purposes, is applicable to various platform conditions and belongs to an MCU (modular concept unit) dimension series with characteristics of standardization, generalization, serialization and modularization. The technical scheme includes that the folding general case comprises a face plate (1), a top plate (2), a rear frame (3) and a bottom plate (4) which are longitudinally fixedly connected with one another by screw assemblies (7) to form a rectangular case frame, left and right side doors (5 and 6) which can be folded and unfolded are mounted on two side surfaces of the rear frame by rotary shaft and screw combinations (8) in a mirror symmetry manner, function modules I and IV can be mounted on the left and right side doors, function modules II and III can be mounted between the top plate and the bottom plate, and an interface module V can be mounted in the rear frame of the case; environmental control cooling air is filled into the case from air inlets (16) at the bottom of the case and is exhausted from air outlets (17) on the top of the case; and a metal wire shielding net assembly (18) is mounted on the inner side surface of an air outlet region of the top plate of the case.

The invention provides a motor cooling structure, an air conditioner, and a motor cooling method. The motor cooling structure includes a motor, a refrigerant pipe, a control valve, a first temperature sensor, a second temperature sensor, and a controller, the refrigerant pipe is arranged on the motor, the first end of the refrigerant pipe is connected with an outlet main pipeline of a condenser of the air conditioner, the second end of the refrigerant pipe is connected with a gas-liquid separator of the air conditioner, the control valve controls the opening and closing of the refrigerant pipe, when the refrigerant pipe is opened, refrigerant of the air conditioner enters into the refrigerant pipe via the first end through the outlet main pipeline and flows into the gas-liquid separator via the second end after passing through the motor, the first temperature sensor detects the outlet pipe temperature of a cooling branch, the second temperature sensor detects the outlet pipe temperature of a four-way valve, and the controller adjusts the opening degree of the control valve based on the difference of the outlet pipe temperature of the cooling branch and the outlet pipe temperature of the four-way valve. According to the invention, the motor cooling effect of the air conditioner is improved, and the energy efficiency of the motor can be maximally performed based on the normal operation of the air conditioner.

The invention provides a motor cooling structure, an air conditioner, and a motor cooling method. The motor cooling structure includes a motor, a refrigerant pipe, an electromagnetic valve, an exhaust parameter sensor, and a controller. the refrigerant pipe is arranged on the motor, the first end of the refrigerant pipe is connected with an outlet main pipeline of a condenser, the second end of the refrigerant pipe is connected with a gas-liquid separator, the electromagnetic valve controls the opening and closing of the refrigerant pipe, when the refrigerant pipe is opened, refrigerant of the air conditioner enters into the refrigerant pipe via the first end through the outlet main pipeline and flows into the gas-liquid separator via the second end after passing through the motor, the exhaust parameter sensor detects the exhaust parameters of a compressor, and the controller adjusts the work state of the electromagnetic valve based on the exhaust parameters detected by the exhaust parameter sensor. According to the invention, the exhaust parameters of the compressor can be set as the basis for determining whether the electromagnetic valve should be opened and closed, so that the control of the motor cooling is more flexible and practical, and the motor can be cooled by the refrigerant flown out of the condenser when the temperature of the motor is too high.

The invention relates to a motor and battery temperature integration control system of an electric automobile. An original air conditioner system of the electric automobile is adopted in the system. The motor and battery temperature integration control system comprises a condenser, an electromagnetic valve, an expansion valve, an evaporator and a compressor, and further comprises a controller, a motor heat dissipating system and a battery heat dissipating system, wherein the motor heat dissipating system and the battery heat dissipating system are in parallel connection with the air conditioner system. The motor heat dissipating system comprises a motor, the electromagnetic valve, the expansion valve and a plate fin type heat exchanger, wherein the motor is in parallel connection with the air conditioner system, and the electromagnetic valve, the expansion valve and the plate fin type heat exchanger are in parallel connection with the air conditioner system; and the battery heat dissipation system comprises a battery, the electromagnetic valve, the expansion valve and a plate fin type heat exchanger, wherein the battery is in parallel connection with the air conditioner system, and the electromagnetic valve, the expansion valve and the plate fin type heat exchanger are in parallel connection with the air conditioner system. By means of the system, the motor and the battery are both provided with temperature sensors. According to the system, the air conditioner system, the motor heat dissipation system and the battery heat dissipation system of an electric passenger car are integrated to the system, the number of components and space are saved, the refrigerating function of the air conditioner compressor can be utilized for meeting the sufficient heat dissipation needs of the motor and the battery, and the heat dissipation effect needed by the motor and the battery is achieved.

The invention provides refrigerating equipment comprising an evaporator, a first fan, an ice-making chamber air delivery duct and an ice-making chamber air return opening. The evaporator is arranged in the refrigerating equipment; the first fan corresponds to the evaporator and used for delivering air to an ice-making chamber; one end of the ice-making chamber air delivery duct is connected to the first fan, and the other end of the ice-making chamber air delivery duct is connected to an ice-making chamber air delivery opening, so that refrigerating in the ice-making chamber is achieved by leading in cold air; and the ice-making chamber air return opening is formed in the ice-making chamber and communicates with a cold storage chamber, so that by leading out the cold air from the ice-making chamber air return opening to refrigerate the cold storage chamber. By means of the technical scheme, on the one hand, the problem that in the prior art, air delivery and refrigerating are conducted on the cold storage chamber, and foods are blow-dried is improved, and the using experience of a user is improved; and on the other hand, the situation that the air volume with larger humidity directly returns into an evaporator bin, frosting of the evaporator is serious, and the refrigerating efficiency is declined is prevented.

The invention relates to a refrigerator, in particular to an intelligent movable refrigerator capable of being powered by a battery, and belongs to the technical field of movable refrigerators. According to the technical scheme, the intelligent movable refrigerator capable of being powered by the battery comprises a movable refrigerator body, the movable refrigerator body comprises a refrigerator main body and an upper door opening cover plate matched with the refrigerator main body. An inner container body is arranged on the upper portion inside the refrigerator main body. An evaporator and a vertical compressor module in matched connection with the evaporator are arranged below the inner container body. The vertical compressor module is electrically connected with a control circuit board used for controlling a refrigeration state. The power source end of the control circuit board and the power source end of the vertical compressor module are connected with the battery used for supplying power. The battery is arranged on a bottom plate inside the refrigerator main body. The intelligent movable refrigerator is compact in structure, is powered by the built-in battery, meets refrigeration work requirements under the condition that the refrigerator is movable and portable, and is high in intelligent degree, safe and reliable.

The invention provides a closed mast internal air-conditioning system for naval ships. The system includes an integrated cooling main unit, a local cooling unit, a liquid dividing valve set, a return collector, an electronic expansion valve and the like, As that cool demand of the cabin is realized, At that same time, a local cool unit is arranged on the upper part of the electronic cabinet to cool the upper area of the electronic cabinet, which can realize the combined cooling of refrigerant refrigeration and mechanical refrigeration with seawater direct cooling, A refrigeration device cansimultaneously control the working environment in the enclosed mast and the upper working environment of the electronic equipment, To realize the integrated cooling mode of seawater and conventional mechanical refrigeration for enclosed mast and electronic cabinet, the whole application system is energy-saving, environmentally friendly, safe and reliable, and has high application value for the design of enclosed mast air-conditioning system.

The present invention provides a lithium ion battery pack for an upper stage. The lithium ion battery pack comprises a shell, a battery cell stack, an insulation board, rubber pads, heat conduction silica gel and an electric connector, wherein the battery cell stack is arranged in the shell and comprises single batteries, adjusting sheets and bridging sheets; the single batteries are sequentiallyarranged in the transverse direction and the longitudinal direction, the adjusting sheets are arranged between the single batteries, and the single batteries are connected in series and in parallel through the bridging sheets; the rubber pads are arranged at the bottom of each single battery; heat conduction silica gel is coated between the single batteries and the rubber pads and between the single batteries and the adjusting sheets; the insulation board is arranged between the side wall plate of the shell and the battery cell stack, and the electric connector is arranged on the shell. According to the lithium ion storage battery disclosed by the invention, all electric energy required by load of the whole device can be provided for 48 hours in orbit from the time when the whole device atthe upper stage is converted into internal electricity to the time when the task at the upper stage is completed.

The invention discloses a bleed air cooling structure and an aeroengine with the bleed air cooling structure. The bleed air cooling structure comprises a left bleed air hood and a right bleed air hood, wherein the left bleed air hood and the right bleed air hood are designed in a half-and-half structure; the left bleed air hood comprises a first outer hood, a first inner hood, a first middle support belt and a first rear hood; the right bleed air hood comprises a second outer hood, a second inner hood, a second middle support belt and a second rear hood; a mounting base which is used for fixedly installing a thermocouple conversion seat, an open hole which is used for temperature detection of a thermocouple probe and a through hole which is used for an exhaust pipe / oil mist pipe to pass through are arranged on and formed in the first rear hood and / or the second rear hood; a first bleed air seat and a second bleed air seat which are used for cooling the outer surface of a turbine component is arranged on the first outer hood and / or the second outer hood. According to the bleed air cooling structure, overtemperature of the engine is effectively avoided, and high temperature of the engine is prevented from being transferred to an airplane, thereby prolonging the service life of the engine and the airplane.

Disclosed is an automatic mixing device for an open mill. The automatic mixing device for the open mill is mainly composed of the open mill, an automatic rubber turning circulating device and an automatic rubber pounding device, wherein the automatic rubber pounding device is arranged on the upper portion of the open mill and can perform automatic rubber pounding on rubber. The automatic rubber turning circulating device is arranged to collect the rubber from the lower portion of the open mill, convey the rubber from the back side and then return to the upper portion of the open mill. The automatic rubber turning circulating device comprises a vertical rubber turning belt and achieves circular conveying of the rubber in the open mill through the circular rotation of the vertical rubber turning belt. By means of the device, the mixing process can be set according to the rubber characteristic, and functions of automatic rubber turning and uniform mixing of the open mill are achieved; the automatic production degree is improved, and accordingly human intervention factors are reduced, the uniformity of the rubber mixing process is guaranteed, the rubber performance stability is guaranteed, and the operation safety is improved; besides, by the cooperation of relevant equipment of spraying, cooling drums and automatic correction and the like, the temperature of rubber and the temperature of the equipment can be controlled effectively and conveniently, and the stable operation of the equipment and the stability of the quality of the rubber are further guaranteed.

The invention discloses a mobile tunnel local ventilation refrigeration device. The device comprises a walking device, wherein the walking device is provided with a refrigeration device used for adjusting the temperature of a local area of the tunnel working face to realize refrigeration, a ventilation system connected with the refrigeration device and used for introducing gas into the refrigeration device, and an oxygen supply device connected with the ventilation system and used for adding oxygen into the airflow. According to the mobile tunnel local ventilation refrigeration device, the functions of rapid movement, large air volume rapid refrigeration and rapid oxygenation of the semi-closed space can be integrated, so that a comfortable working environment can be provided for workers,the situation that workers are injured due to high temperature and hypoxia can be reduced or even avoided, and the tunnel construction efficiency can also be improved.

The embodiment of the invention provides a multi-heat-source phase change heat dissipating device which comprises a liquid storing tank, a pump, a filter, a flow meter, a multi-heat-source phase change heat management unit for gradient composite heat exchange, a condenser, a liquid return pipeline and a liquid supply pipeline. The multi-heat-source phase change heat dissipating device is applicable to heat dissipating of multi-heat-source chips with high heat flow density, devices or equipment, according to the characteristic of multiple heating parts, based on the phase change heat managementunit for gradient composite heat exchange and other distribution application forms, corresponding group control strategies are combined, and it is ensured that the multiple heating parts are locatedwithin the reasonable temperature range.

The invention discloses a heat transfer strengthening device for natural convection heat dissipation and a design method thereof. The heat transfer strengthening device comprises an auxiliary heat dissipation wall fixedly disposed on the surface of a device to be cooled. The auxiliary heat dissipation wall and the surface of the device to be cooled constitute a cylindrical ventilation passage. Thecross-sectional area of the cylindrical ventilation passage remains unchanged or gradually decreases along the flow direction of an air flow. The auxiliary heat dissipation wall is provided with a plurality of vents. The heat transfer strengthening device of the invention can be applied to the surface of a device based on natural convection heat transfer, can improve an air natural convection heat dissipation effect, can retard sunlight irradiation, and can reduce the surface temperature of the outdoor device to be cooled. The auxiliary heat dissipation wall can avoid the direct radiation ofthe sunlight to the surface of the device to be cooled, thereby reducing the total amount of heat dissipation of the device. The cylindrical ventilation passage can form a chimney suction effect to effectively increase the natural convection velocity of the air near the surface of the device to be cooled, so as to strengthen the heat transfer.

The invention relates to a compressor oil return device, an air conditioning system and an oil return control method. The compressor oil return device comprises a double-suction double-exhaust compressor, and an oil separator and an oil return component which are connected to the double-suction double-exhaust compressor, wherein the oil return component comprises an oil return valve and a connecting pipe; the oil return valve comprises a valve body, a valve needle, a fixed block and a sliding block; the fixed block is fixedly connected into the valve body; the fixed block divides the valve body into an upper cavity and a lower cavity; the sliding block is arranged in the lower cavity and located below the fixed block; a middle cavity is arranged between the sliding block and the fixed block; a flow channel communicated with the upper cavity and the lower cavity is arranged in the middle cavity; and the valve needle matched with the flow channel is arranged under the flow channel. The length of the valve needle extending into the flow channel is changed through vertical sliding of the sliding block in order to achieve adjustment of the oil return amount. The oil return valve is simple in structure, low in manufacturing cost and convenient to use, the problems of high oil discharge rate and difficult lubricating oil return in a direct exhaust compression cylinder of the double-suction double-exhaust compressor can be effectively solved, the abrasion of the compressor is reduced, and the service life is prolonged.

An intelligent cooling electric vehicle controller, including a cooling plate, a sealed plastic cover and electronic components, the sealed plastic cover is provided with a one-way air outlet valve and several connecting columns, and the sealed plastic cover is equipped with a temperature control Module, gas injection pipe and several temperature sensors, the outer side of the sealed plastic cover is provided with a gas delivery device and a drying device, the upper part of the gas injection pipe is sealed, and the bottom is connected to the gas outlet of the gas delivery device, and the gas delivery device The air inlet is connected to the air outlet of the drying device, and all the above-mentioned temperature sensors and gas delivery devices are connected to the temperature control module. The present invention overcomes the deficiencies of the prior art. An air injection pipe is arranged in the controller, the air injection pipe is connected with the gas conveying device, and the gas conveying device is connected with the drying device. Exhaust air through the existing one-way air outlet valve on the device to meet heat dissipation requirements.

The invention relates to the technical field of tire detection, in particular to a tire appearance detection device and a using method thereof. The two sides of the upper portion of a rack are provided with a rotating assembly and a driving assembly respectively, the side face of the rotating assembly is provided with two rotatable detection assemblies, and the detection assemblies correspond to the inner surface and the outer surface of a tire respectively; the tire appearance detection device has the advantages that light supplement of the detection device can be more uniform by using the annular LED lamp, and reciprocating switching between synchronous operation of the rotating table and the translation seat and simplex operation of the rotating table is realized through the switching piece, so that different detection requirements are met; an image sensor is adopted to collect images for multiple times, two frames of images are continuously collected at a time, and the influence of ambient light is eliminated through differential operation of the two frames of images; tire fixing is achieved through the driving assembly, and meanwhile the tire can be controlled to rotate stably.

The invention discloses a split type air conditioner system for a pure electric vehicle, and belongs to air conditioner systems. The split type air conditioner system structurally comprises a front HVAC assembly, a top evaporator assembly, an electric compressor and a condenser, wherein a compressor exhaust pipe of the electric compressor is connected with the condenser and provided with a pressure switch; the condenser is connected with the front HVAC assembly and the top evaporator assembly through a front cooling liquid outlet pipe which is connected with an HVAC liquid inlet pipe of the front HVAC assembly, and the condenser is further connected with a top evaporator liquid inlet pipe of the top evaporator assembly through a high-pressure connecting pipe. A top evaporator air outlet pipe of the top evaporator assembly is connected with a compressor air return pipe of the electric compressor through a low-pressure connecting pipe and an HVAC air outlet pipe of the front HVAC assembly. The top evaporator liquid inlet pipe is provided with an electromagnetic valve, the electric compressor is electrically connected with a battery of a finished vehicle and an electric control box, and the electric control box is electrically connected with an air conditioner control panel. By means of the split type air conditioner system for the pure electric vehicle, air quality management of a vehicle air conditioner is achieved, and the technical problem of serious energy consumption of the vehicle air conditioner is solved.

The invention belongs to the technical field of electronic device heat dissipation methods, and particularly relates to an array jet and solid-liquid phase change coupling-based electronic device heatdissipation method. The method solves a high heat flux heat dissipation problem of a high-power electronic device. The method is carried out through an array jet structure, a flow working medium forthe method is a phase change nano capsule suspension, and the phase change nano capsule suspension and a target object exchange heat, so as to control the temperature of the target object. According to the method, the phase change nano capsule suspension is used in submerged array jet impact heat exchange, solid-liquid phase change heat exchange of a phase change capsule core and a disturbance action of a nano capsule particle can improve the heat exchange performance of the array jet remarkably, so as to meet the heat dissipation demand of the target object under a high heat flux condition. The solid-liquid phase change enhanced heat exchange manner used in the invention is relatively stable, and the heat dissipation structure is simpler.

The invention discloses a heat dissipation device. The heat dissipation device comprises a shell (1), an air duct (2) in the shell (1), wherein a heating part and a rotary support for fixing the position of the heating part are arranged in the air duct (2), and an air inlet (101) and an air outlet (102) formed in the air duct (2), wherein the air duct (2) guides air which enters from the air inlet(101), flows through the heating part in the rotary support and is exhausted from the air outlet (102). The technical problems that a conventional CT scanning frame needs a fan with large flow and large size to conduct system heat dissipation so that the CT scanning frame is thick and heavy and operation noise is large are solved.

The invention discloses a novel pressure relief device for a high-voltage switch cabinet, comprising a box body with a cuboid structure, wherein the box body is provided with an open opening formed ona relatively large surface and a pressure relief cover plate separably covering the open opening; a fish scale explosion-proof plate is installed on the inner side of the pressure relief cover plate;and a plurality of filter screens are fixed side by side in the box body. The invention has the beneficial effects that the pressure relief cover plate of the pressure relief device adopts a metal hinge on one side and a nylon bolt on the other side; when the switch cabinet has an internal arc fault, the nylon bolt can be quickly punched out, the pressure relief overturning plate can be quickly opened, rapid pressure relief is realized, and the internal pressure of the cabinet body is effectively reduced.

The invention discloses a dual-mode switching method for a pump flow mode and a self-flow mode of a ship cooling system, which comprises the following steps of: 1) determining the required vacuum of a condenser of the cooling system, which is expressed by pressure; 2) setting a vacuum value pref as an identifier of a pump flow mode and an automatic flow mode; 3) designing starting and quitting rules of a pump flow mode; when the detected vacuum value in the condenser is greater than a set value and is kept for more than N sampling periods, the cooling system keeps a pump flow mode or is switched from a self-flowing mode to the pump flow mode; and when the detected vacuum value in the condenser is smaller than the set value and is kept for more than N sampling periods, the cooling system keeps a self-flowing mode or is switched from the pump flow mode to the self-flowing mode. Two switching modes are provided, the requirement for maximization of a self-flowing navigational speed interval or the optimal vacuum environment is met, the performance requirements for the optimal energy-saving and noise-reducing effects and the optimal operation vacuum environment can be met respectively, and implementation of multi-target operation of the cooling system is facilitated.

The invention provides a heat source tower heat pump multi-split system. The system comprises a heat source tower, a heat pump main machine and at least two indoor units; the heat pump main machine comprises a four-way valve, a compressor, a main machine heat exchanger and a solution pump; one end of a heat source liquid pipeline in the main machine heat exchanger is in communication with an inputend of the heat source tower through the solution pump, and the other end of the heat source liquid pipeline in the main machine heat exchanger is in communication with an output end of the heat source tower; each indoor unit comprises an indoor heat exchanger and an expansion valve; and one end of a refrigerant pipeline in each indoor heat exchanger is in communication with an E pipe of the four-way valve, and the other end of the refrigerant pipeline in each indoor heat exchanger is in communication with one end, which is not in communication with the main machine heat exchanger, of the expansion valve. According to the heat source tower heat pump multi-split system, the requirements of refrigeration and heat supply can be met at the same time by one system, the efficient and energy-saving operation can be realized all the year, and meanwhile, the problem of automatic detection of the anti-freezing fluid concentration of the heat source tower heat pump system is solved.

The invention discloses a refrigerator. The refrigerator comprises a refrigerator body, wherein the refrigerator body comprises a plurality of storage chambers; a refrigerating system, wherein the refrigerating system comprises a compressor, a condenser, a freezing evaporator, a liquid storage device, a first one-way valve, a pump and a cold storage evaporator; and a water inlet of the liquid storage device is connected with the freezing evaporator, an air outlet of the liquid storage device is connected with the compressor, a water outlet of the liquid storage device is connected with the first one-way valve, the first one-way valve is connected with the pump, and the pump is connected with the cold storage evaporator. A controller is configured to obtain a freezing evaporator temperature of the freezing evaporator. When the temperature of the freezing evaporator is smaller than a preset evaporator temperature threshold value, the first one-way valve is opened, so that the pump works; and the cold storage temperature of the cold storage chamber is obtained. When the cold storage temperature is smaller than a preset cold storage temperature threshold value, the first one-way valve is closed, so that the pump stops working. The invention further discloses a refrigeration method of the refrigerator. By adopting the refrigerator and the refrigeration method thereof, the normal refrigeration of the refrigerator can be ensured, and meanwhile, the compressor can be prevented from generating liquid impact in the operation process.