46results about How to "Raise the suction temperature" patented technology

The heat-flash air conditioning and its method of defrosting and it is in characterized in that: in the indoor machine sets up a big power secondary electric hot device and the big power secondary electric hot device's electric heat power is 0.9 to 1.4 times to the system's standard cooling quantity. When it is defrosting keep the indoor cross flow flan running in low speed and at the same time open the big power secondary electric hot device with the circulate system in the work condition of cooling. The invention can make the heating quantity of system reached two times or more to the cooling quantity so it is satisfied the small cooling quantity and big heating quantity of the setting requirement of system especially it is suited to the southwest area with the lower temperature and the bigger moisture. During the process of defrosting the fluctuation of environment's temperature is small and the time of defrosting is shorter and the defrosting is more clearly and thoroughly.

The invention relates to a rotary compressor with enthalpy-gaining function. An upper bearing or a lower bearing of the rotary compressor is provided with one or more gas orifices; the gas orifices are matched with a pipeline so as to allow an air cylinder of the compressor to communicates with the external part of the compressor through the gas orifices; the gas orifices are provided with a one-way valve for allowing external fluid to enter the air cylinder through the pipeline and the gas orifices and preventing the fluid in the air cylinder from discharging from the gas orifices and the pipeline. The rotary compressor of the invention improves the structure of conventional rotary compressor by enabling a gaseous refrigerant to be injected into the compressor air cylinder through the pipeline, thus increasing the suction temperature of the rotary compressor, improving the compression efficiency and saving energy.

The invention discloses a multifunctional ice storage air conditioning hot water system capable of efficiently utilizing peak and valley price. The air conditioning hot water system can greatly enhance the running efficiency of an air conditioning system and the utilization efficiency of energy by additionally arranging a heat exchanger among an ice storage cylinder, an outdoor heat exchanger and an indoor heat exchanger and arranging an electromagnetic valve which can be independently controlled at both ends of the ice storage cylinder and both ends of the outdoor heat exchanger. In addition, the invention also discloses a control method for the air conditioning system.

The invention provides a solar air conditioner for improving air conditioning heating performance. The solar air conditioner comprises a compressor, an indoor unit heat exchanger, an outdoor unit heat exchanger, a solar module and a four-way valve, wherein an air suction port and an exhaust port are formed in the compressor; and the solar module is connected between the outdoor unit heat exchanger and the four-way valve. According to the solar air conditioner for improving the air conditioning heating performance, a heat pump technology is combined with a solar energy technology, so that air conditioning low-temperature starting performance can be enhanced, the outlet air temperature comfort can be improved, a modular design is used, the universality of the air conditioner is enhanced, the application temperature range of heat pump air conditioning is greatly expanded, and the solar air conditioner is environment-friendly and economical.

The invention discloses a heat recovery type evaporation-condensation type water cooling unit and belongs to the technical field of air conditioner units. An existing evaporation-condensation type water cooling unit is low in heat recovery rate and low in hot-water recycled temperature in a heat recovery working condition. A water cooling channel performing heat exchange with a refrigerant channel B of a flooded evaporator is additionally arranged in the flooded evaporator, the water cooling channel is connected with a water collection pool through a water pipe to take water from the water collection pool to perform heat exchange with the refrigerant channel B; equivalently, an overheating device is additionally arranged in the flooded evaporator, the low-pressure low-temperature saturated gaseous refrigerant in the flooded evaporator becomes supersaturated vapor after performing full heat exchange with the cooling water at the temperature of about 25 DEG C introduced from the water collection pool, the suction temperature and the suction superheat degree of a compressor are increased accordingly, and the discharge temperature of the compressor is increased; and by means of the heat recovery type evaporation-condensation type water cooling unit, the problems that the evaporation-condensation type water cooling unit is low in heat recovery rate and low in hot-water recycled temperature in the heat recovery working condition are solved.

The invention discloses a heat pump unit control method. The heat pump unit adopted by the method is controlled by a double-expansion valve for increasing enthalpy of a compressor, and comprises a main heat exchange loop and an auxiliary air supply loop, and the main heat exchange loop and the auxiliary air supply loop are subjected to heat exchange through a first heat exchanger; the method comprises the following steps that deviation rate of an air suction superheat degree of the compressor is calculated, and the opening degree of a main throttling device is adjusted according to the deviation rate of the air suction superheat degree; an actual target superheat degree of the first heat exchanger is calculated, the opening degree of an auxiliary throttling device is adjusted according tothe actual target superheat degree of the first heat exchanger. According to the heat pump unit control method, the opening degree of the main throttling device on the main heat exchange loop and theopening degree of the auxiliary throttling device on the auxiliary air supply loop are adjusted, and then the amount of refrigerant entering the heat exchange loop and the air supply loop is adjustedcorrespondingly, so that the unit is enabled to improve the air suction temperature of a press machine of the unit under a low ambient temperature, high heat exchange of the unit at a low ambient temperature is guaranteed, and the heating capacity of the unit is improved.

An air conditioning refrigerating device comprises a high back pressure rotary compressor; an outlet of the high back pressure rotary compressor is connected with an inlet of a condenser; an outlet of the condenser is connected with a liquid inlet of a heat regenerator; the liquid outlet of the heat regenerator is connected with an inlet of a swelling valve; an outlet of the swelling valve is connected with an inlet of an evaporator; an outlet of the evaporator is connected with an air inlet of the heat regenerator; an air outlet of the heat regenerator is connected with an inlet of the high back pressure rotary compressor. According to the air conditioner refrigerating device, refrigerant firstly enters into the high back pressure rotary compressor, enters into the compressor after being compressed into high temperature high pressure air, then is condensed into intermediate temperature high temperature liquid and discharges heat to the air; the refrigerant then flows through the heat regenerator to enter into the swelling valve to be throttled to be in a low temperature low pressure air-liquid mixed state; then the refrigerant enters into the evaporator to change heat with the air in the environment to enable the air temperature to be reduced; accordingly the refrigerating effect is achieved. The air conditioner refrigerating device has the advantages of improving the compressor efficiency and a refrigeration coefficient of a refrigeration system and being good in lubricating oil return.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and an oil return control method thereof. The air conditioner and the oil return control method thereof aim to solve the problem that the exhaust temperature of a compressor is too high due to the oil return mode of the existing air conditioner. The air conditioner comprises a compressor, a heat exchanger and an oil separator, wherein a first oil return branch and a second oil return branch are arranged between an air inlet of the compressor and an oil outlet of the oil separator inparallel, the first oil return branch directly makes the air inlet of the compressor connect with the oil outlet of the oil separator, and the second oil return branch makes the air inlet of the compressor with the oil outlet of the oil separator after flowing near the heat exchanger. The oil return control method comprises the following steps that1, outdoor ambient temperature is acquired; 2, according to the outdoor ambient temperature, the first oil return branch or the second oil return branch is selectively communicated to adaptively change the oil return temperature of the lubricating oil, so that the reflux temperature of the lubricating oil can always be matched with the exhaust temperature required by the compressor.

The invention relates to a drying device, in particular to a freezing and drying integrated vacuum freezing and drying machine. The machine comprises a freezing and drying evaporation bin, a freezing evaporation plate arranged in the freezing and drying evaporation bin, a water catching bin, a refrigeration compressor unit, a vacuum pump and an electrical control cabinet, wherein the refrigeration compressor unit is composed of a refrigeration compressor, an oil separator, a condenser and a liquid storage device. The freezing and drying integrated vacuum freezing and drying machine is characterized in that the part between the closed freezing and drying evaporation bin and the closed water catching bin is partitioned through two parallel partition plates, a closed cavity is formed between the two parallel partition plates, a ventilation hole is formed in the lower end of the partition plate on one side of the freezing and drying evaporation bin, and a ventilation hole is formed in the upper end of the water catching bin partition plate on one side of the water catching bin. The refrigeration compressor is connected with the freezing and drying evaporation bin and the water catching bin through a pipeline, and the vacuum pump is connected with the bottom of the water catching bin. The technical scheme has the beneficial effects that the equipment configuration and structure are more reasonable, the equipment running efficiency is high, and the service life is long. The production cost and the using cost of the equipment can be reduced by about 10%-20% compared with current vacuum freezing and drying equipment.

The invention discloses an instant waste heat recycling heating unit and a water outflow thermostatic control method of the heating unit, and relates to a fluid heater using a heat pump and a control method of the fluid heater, in particular to the instant waste heat recycling heating unit and the water outflow thermostatic control method of the heating unit which are used for a waste heat comprehensive utilization system. The instant water heat recycling heating unit comprises a double-system heat pump, a water inlet electromagnetic valve, a thermostatic control valve and a water / water heat exchanger used for primary heat recovery, wherein the double-system heat pump comprises a first compressor, a second compressor, a first throttling valve, a second throttling valve, an evaporator, a first gas-liquid separator, a second gas-liquid separator and a condenser. By means of steam recycling with heat, the fact that refrigerants before throttling are supercooled is guaranteed, the suction temperature of a product is increased, heating capacity of the product is improved, and damage caused by liquid impact to the compressors is prevented. According to the relation of water tank water temperature, waste water temperature and set water temperature, due to the fact that the thermostatic control valve carries out a PID algorithm, openness of the thermostatic control valve is controlled, water flow is adjusted, and therefore the water tank water temperature keeps constant when the waste water temperature fluctuates.

Provided is an air conditioning refrigeration system. An outlet of a high-back-pressure rotary compressor is connected with an inlet of a condenser, an outlet of the condenser is connected with a liquid inlet of a heat regenerator, a liquid outlet of the heat regenerator is connected with an inlet of an expansion valve, an outlet of the expansion valve is connected with an inlet of an evaporator, an outlet of the evaporator is connected with a gas inlet of the heat regenerator, and a gas outlet of the heat regenerator is connected with an inlet of the high-back-pressure rotary compressor. Refrigerating fluid enters the high-back-pressure rotary compressor firstly, and is compressed into high-temperature high-pressure gas entering the condenser, the gas is condensed into intermediate-temperature high-pressure liquid, and heat is discharged into air. The refrigerating fluid flows through the heat regenerator and enters the expansion valve, and is throttled to be in a low-temperature low-pressure gas-liquid mixing state, then the refrigerating fluid enters the evaporator, heat exchange is carried out on the refrigerating fluid and the air in the environment, the temperature of the air is reduced, and therefore the refrigeration effect is achieved. According to the system, efficiency and stability are improved, oil return is good, the probability of blocking capillary tubes is reduced, and the injection amount of the refrigerating fluid is reduced.

The invention belongs to the field of industrial processes, energy and environmental protection, and particularly relates to a multi-energy gradient utilization heat pump low-temperature evaporation and concentration system capable of accurately controlling temperature. The multi-energy gradient utilization heat pump low-temperature evaporation and concentration system capable of accurately controlling the temperature comprises a heating tank, a steam cooling and condensing system, a heat pump circulating system, a vacuumizing and re-condensing system, a water circulating temperature adjusting system, a heat dissipation system and a material preheating system. According to the system, efficient heat exchange on the refrigerant side can be achieved, the pressure environment of the material heating coil is improved, the adverse problems caused by heating materials through a high-temperature refrigerant are effectively solved, the material treatment quality is improved, meanwhile, the superheat degree of secondary steam can be reduced, and the heat exchange environment on the evaporator side during initial starting is improved. The system can accurately control the boiling evaporation temperature of the materials and efficiently utilize the materials in a gradient manner according to energy grades, so that the purposes of saving energy and reducing carbon are achieved, and the system is very significant.

The invention provides an air conditioner system. The air conditioner system comprises a compressor, a four-way reversing device, a throttling device, an indoor machine heat exchanger and an outdoor machine heat exchanger; the indoor machine heat exchanger is communicated with the outdoor machine heat exchanger through a refrigerant pipeline; the air conditioner system also comprises a heat exchanging device; the heat exchanging device comprises a casing and a heating portion; an accommodating groove is formed in the casing; the accommodating groove is communicated with the indoor machine heat exchanger through a pipeline; the refrigerant pipeline is at least partially arranged inside the accommodating groove; the heating portion is connected to the outer wall of the refrigerant pipeline. The air conditioner system effectively solves the problems that, in the prior art, the air conditioner system wastes energy under a refrigerating mode and the outer machine heat exchanger is easy to be frosted under a heating mode in a low temperature environment.

The invention discloses a heating device of a scroll compressor and relates to the technical field of air conditioning. The heating device comprises a casing, wherein an air inlet is formed in the right end of the casing; the left end of the casing is in threaded connection with an end cover through a screw; an exhaust port is formed in the outer surface of the end cover; and a PTC heating deviceis arranged in the casing. According to the heating device, a PTC heating body is arranged to convert electric energy into thermal energy under the action of a wiring terminal, so that the suction temperature of the compressor can be effectively increased to directly increase the discharge temperature of the compressor, the heating performance of an air conditioning system is improved, the problemthat the heating capacity of the existing air conditioning compressor is low at the low temperature heating state is solved, the purpose that the absorbed air of the air conditioning compressor is rapidly heated to increase the discharge temperature of the compressor accordingly is realized, the air conditioner is forced to improve the heating efficiency at the low temperature state, the waitingtime of a user is effectively shortened, and the degree of satisfaction of the user is increased.

The invention provides a heat pump system and a control method thereof. The heat pump system comprises a compressor (1), a first heat exchanger (3), a first gas supplementing pipeline and a first heatregenerator (6); the first end of the first gas supplementing pipeline is connected to a gas supplementing port of the compressor (1); a pipeline between the first heat exchanger (3) and the compressor (1) is a first heat exchanging pipeline; and heat exchanging is performed between the first heat exchanging pipeline and the first gas supplementing pipeline through the first heat regenerator (6).The heat pump system can effectively raise the gas sucking temperature of the compressor, it is avoided that liquid is taken during gas sucking of the compressor, the gas sucking superheat degree isimproved, and the unit heating capacity is increased.

The invention discloses an electric vehicle heat pump air conditioner for defrosting by using a heat storage device. The electric vehicle heat pump air conditioner comprises a heat pump loop and a heat storage loop; the heat pump loop is mainly composed of an electric compressor, a four-way valve, an in-vehicle heat exchanger, a double-way expansion valve and an out-vehicle heat exchanger; the heat storage loop is mainly composed of a heat storage heat exchanger, a first solenoid valve, the heat storage device, a second solenoid valve and a water pump. The invention further discloses a defrosting method of the electric vehicle heat pump air conditioner for defrosting by using the heat storage device. According to the electric vehicle heat pump air conditioner, the heat pump loop is added,partial heat in a heating mode is stored in the heat storage device, heat stored in a heat storage working medium is used for heating an indoor heat exchanger in a defrosting mode, and the evaporationtemperature is increased; the comfort degree in a vehicle can be increased, formation of condensate water is avoided, hidden dangers of atomization of the condensate water are eliminated, safety driving of the vehicle is guaranteed, the air suction temperature of the electric compressor can also be increased, then the condensation temperature of an outdoor heat exchanger is increased, and the defrosting time is shortened.

The invention discloses a full energy-gathered heating system which comprises a compressor; an air exhaust port of the compressor is connected with a first connector of a four-way reversing valve through a pipeline; a second connector of the four-way reversing valve is connected with an air suction port of the compressor through a pipeline; a third connector of the four-way reversing valve is connected with an air inlet end of a water heat exchanger; an air outlet end of the water heat exchanger is connected with a first air inlet of an enthalpy replenishment heat exchanger; a first air outlet of the enthalpy replenishment heat exchanger is connected with an input end of a liquid storage tank through a first one-way valve; a second output end of the liquid storage tank is connected with a drying and filtering device; a first output end of the drying and filtering device is connected with a fin unit through an electronic expansion valve D2; an output end of the fin unit is connected with a main solar panel; and an output end of the main solar panel is connected with a fourth connector of the four-way reversing valve. The main solar panel is added in a traditional heating system, and energy of the sun is absorbed through solar panels, so that the suction temperature of the compressor is increased.

The invention discloses a water vapor heat pump system with solar supplementary heating. The water vapor heat pump system includes a water vapor heat pump subsystem and a solar heat collection system,wherein a solar heat collection subsystem is connected to the water vapor heat pump subsystem for carrying out supplementary heat treatment on low-grade waste heat input externally and then transporting the treated low-grade waste heat to the a water vapor heat pump subsystem; and the water vapor heat pump subsystem is connected to the solar heat collection subsystem and is used to recover the low-grade waste heat after supplementary heat treatment. According to the water vapor heat pump system with solar supplementary heat, the low-grade waste heat in the industry can be effectively recovered through the water vapor heat pump subsystem, and meanwhile, by using the solar heat collection subsystem to supplement heat, the suction temperature of the water vapor heat pump subsystem is increased, water spraying temperature reduction is carried out on a compressor, the compressor exhaust temperature and power consumption are reduced, the efficiency of a water vapor heat pump is improved, compared with a system without supplemental heat, the effects of energy saving and emission reduction are achieved, and the water vapor heat pump system has significant production practice significance.

The invention discloses a rotary compressor. The rotary compressor comprises an electric structure part and a compressing structure part, wherein the electric structure part comprises a stator and a rotor which are fixedly arranged inside a machine enclosure; the compressing structure part comprises a circular cylinder fixedly arranged on the inner circumference surface of the machine enclosure, as well as an upper bearing and a lower bearing which are tightly attached to the upper and the lower side surfaces of the cylinder and through which a crankshaft penetrates to be supported at the same time; a through hole for penetrating through the upper bearing is formed in an air suction port of the compressor; and the diameter of the through hole is 0.8-1.2mm. According to the compressor disclosed by the invention, during the air suction process of the compressor, a small amount of high temperature gas enters the interior of the cylinder from the through hole, so that the air suction temperature of the compressor is increased, the enthalpy gain effect is achieved, and the exhaust temperature is prevented from being overhigh; and while the air suction capacity of the compressor is improved, the high temperature gas sucked from the through hole is directly merged with a cooling medium entering from the air suction port, so that liquid drops mixed in the sucked cooling medium can be vaporized, liquid hammer is prevented, and the cylinder is prevented from being damaged.

The invention discloses an instant waste heat recycling heating unit and a water outflow thermostatic control method of the heating unit, and relates to a fluid heater using a heat pump and a control method of the fluid heater, in particular to the instant waste heat recycling heating unit and the water outflow thermostatic control method of the heating unit which are used for a waste heat comprehensive utilization system. The instant water heat recycling heating unit comprises a double-system heat pump, a water inlet electromagnetic valve, a thermostatic control valve and a water / water heat exchanger used for primary heat recovery, wherein the double-system heat pump comprises a first compressor, a second compressor, a first throttling valve, a second throttling valve, an evaporator, a first gas-liquid separator, a second gas-liquid separator and a condenser. By means of steam recycling with heat, the fact that refrigerants before throttling are supercooled is guaranteed, the suction temperature of a product is increased, heating capacity of the product is improved, and damage caused by liquid impact to the compressors is prevented. According to the relation of water tank water temperature, waste water temperature and set water temperature, due to the fact that the thermostatic control valve carries out a PID algorithm, openness of the thermostatic control valve is controlled, water flow is adjusted, and therefore the water tank water temperature keeps constant when the waste water temperature fluctuates.

The invention relates to a vehicle thermal management system and a vehicle. The system comprises a cooling liquid loop, a first cooling liquid flow path, a second cooling liquid flow path, a third cooling liquid flow path, a first heat exchanger and a second heat exchanger. The first end of the first cooling liquid flow path, the first end of the second cooling liquid flow path and the first end of the third cooling liquid flow path are connected with one another, and the second end of the third cooling liquid flow path is selectively connected with the second end of the first cooling liquid flow path or the second end of the second cooling liquid flow path; a motor is arranged on the first cooling liquid flow path or the second cooling liquid flow path, a battery pack is arranged on the second cooling liquid flow path, a first water pump is arranged on the third cooling liquid flow path, and the first heat exchanger is arranged in the third cooling liquid flow path and an air conditioning system of a vehicle heat management system at the same time. The second heat exchanger is arranged in the cooling liquid loop and the air conditioning system at the same time, and a second water pump and a warm air core body are further arranged on the cooling liquid loop.

The invention discloses a flooded vortex heat-pump hot-water machine comprising a scroll compressor, an oil separator, a condenser, a plate-type evaporator, an electronic expansion valve, a flooded evaporator, a capillary tube and an aspirating tube. The scroll compressor, the oil separator, the condenser, the plate-type evaporator, the electronic expansion valve, the flooded evaporator and the aspirating tube are sequentially communicated end to end through pipelines. The middle or lower parts of an inner pipeline of the flooded evaporator are communicated with the plate-type evaporator through the capillary tube, and one side of the upper end of the plate-type evaporator is further communicated with the aspirating tube. By the adoption of the structure that the plate-type evaporator is connected with the flooded evaporator through the capillary tube, the problem that recycling of lubricating oil is difficult in the scroll compressor mounted in an air source heat pump group is solved. By the adoption of the double-evaporator structure, chilled water consumption of the flooded evaporator is reduced through shunt of the plate-type evaporator, suction temperature is raised, temperature difference of exhaust and suction is reduced, and input power when the compressor operates is lowered.

The invention discloses a compressor with a blowdown pipe, an air conditioning unit and a control method of the compressor. The compressor comprises an air suction pipe and an exhaust pipe, the compressor further comprises the blowdown pipe, the first end of the blowdown pipe communicates with the exhaust pipe, the second end of the blowdown pipe communicates with the air suction pipe, and an adjusting valve is arranged on the blowdown pipe. According to the compressor with the blowdown pipe, the air conditioning unit and the control method of the compressor, the problems that the performance of the compressor is reduced and the performance of the air conditioning unit is low due to the structural arrangement of the compressor in the prior art can be effectively solved.

The heat-flash air conditioning and its method of defrosting and it is in characterized in that: in the indoor machine sets up a big power secondary electric hot device and the big power secondary electric hot device's electric heat power is 0.9 to 1.4 times to the system's standard cooling quantity. When it is defrosting keep the indoor cross flow flan running in low speed and at the same time open the big power secondary electric hot device with the circulate system in the work condition of cooling. The invention can make the heating quantity of system reached two times or more to the cooling quantity so it is satisfied the small cooling quantity and big heating quantity of the setting requirement of system especially it is suited to the southwest area with the lower temperature and thebigger moisture. During the process of defrosting the fluctuation of environment's temperature is small and the time of defrosting is shorter and the defrosting is more clearly and thoroughly.

The invention provides a heat pump system based on a regenerative cycle and a throttling element control method. The problems that an existing compression cycle system has a low pressure phenomenon and a throttling element is blocked are solved. The heat pump system comprises a compressor, a condensation heat exchanger, a regenerator, a throttling element and an evaporation heat exchanger, wherein an outlet of the compressor is connected with an inlet of the condensation heat exchanger, an outlet of the condensation heat exchanger is connected with a hot end inlet of the regenerator, a hot end outlet of the regenerator is connected with an inlet of the throttling element, an outlet of the throttling element is connected with an inlet of the evaporation heat exchanger, an outlet of the evaporation heat exchanger is connected with a cold end inlet of the regenerator, and a cold end outlet of the regenerator is connected with an inlet of the compressor. According to the system, residual heat brought by the temperature difference between high temperature at the outlet of the condensation heat exchanger and suction temperature is utilized to increase the suction superheat degree, so that the exhaust superheat degree is controlled, the solubility of a refrigerant in an oil pool is lowered, the problems of suction low pressure and throttling element blockage in an unsteady process are relieved, and the reliability and the energy efficiency ratio of the system are improved.

The present disclosure relates to the technical field of heat pumps, in particular to an air source CO2 heat pump system for preventing an evaporator from frosting by using heat of a heat regenerator. The air source CO2 heat pump system mainly includes an air source heat pump system, a regenerative heat exchange tank and a cooling pump. Through the regenerative heat exchange tank, on the one hand, the temperature drop of regenerative heat of the system is further increased and throttling loss is reduced; on the other hand, the heat generated by the regenerative temperature drop is configured for heat storage used for defrosting, and configured for overheating temperature rise.

The invention discloses a rotary compressor. The rotary compressor comprises an electric structure part and a compressing structure part, wherein the electric structure part comprises a stator and a rotor which are fixedly arranged inside a machine enclosure; the compressing structure part comprises a circular cylinder fixedly arranged on the inner circumference surface of the machine enclosure, as well as an upper bearing and a lower bearing which are tightly attached to the upper and the lower side surfaces of the cylinder and through which a crankshaft penetrates to be supported at the same time; a through hole for penetrating through the upper bearing is formed in an air suction port of the compressor; and the diameter of the through hole is 0.8-1.2mm. According to the compressor disclosed by the invention, during the air suction process of the compressor, a small amount of high temperature gas enters the interior of the cylinder from the through hole, so that the air suction temperature of the compressor is increased, the enthalpy gain effect is achieved, and the exhaust temperature is prevented from being overhigh; and while the air suction capacity of the compressor is improved, the high temperature gas sucked from the through hole is directly merged with a cooling medium entering from the air suction port, so that liquid drops mixed in the sucked cooling medium can be vaporized, liquid hammer is prevented, and the cylinder is prevented from being damaged.

The invention provides a cascade compression refrigeration system and refrigeration equipment with the cascade compression refrigeration system. The cascade compression refrigeration system comprises a high-temperature-stage refrigeration circulation loop and a low-temperature-stage refrigeration circulation loop, wherein the high-temperature-stage refrigeration circulation loop is used for circulating a first refrigerant; an evaporation part is arranged in the high-temperature-stage refrigeration circulation loop; the low-temperature-stage refrigeration circulation loop is used for circulating a second refrigerant; a low-temperature-stage compressor, a condensation part, a low-temperature-stage evaporation pipe and a heat exchange assembly are arranged in the low-temperature-stage refrigeration circulation loop; the heat exchange assembly comprises a heat releasing part and a heat absorption part; the heat releasing part is arranged between an exhaust port of the low-temperature-stage compressor and the condensation part; the heat absorption part is arranged between the low-temperature-stage evaporation pipe and a suction inlet of the low-temperature-stage compressor; the heat absorption part is used for enabling the second refrigerant flowing through the heat absorption part to absorb the heat of the second refrigerant flowing through the heat releasing part to increase the temperature, so that the air suction temperature of the low-temperature-stage compressor can be increased, and the heat load of the high-temperature-stage refrigeration circulation loop can be reduced.