CN221197719U - Air return supercharging device of compressor and air conditioning system - Google Patents

Abstract

The embodiment of the application provides a compressor air return supercharging device and an air conditioning system, wherein an air return port of a compressor is connected with a turbocharging fan, a double-output-shaft motor is arranged in an outer tube shell of the turbocharging fan, an air inlet tube and an air outlet tube are respectively arranged at two ends of the outer tube shell, and an air inlet turbine blade and an air outlet turbine blade are respectively arranged at two output ends of the double-output-shaft motor. The air conditioning system comprises an outdoor heat exchanger, an indoor heat exchanger, a gas-liquid separator and a four-way valve, wherein an exhaust port of the compressor is connected with a valve port a of the four-way valve, one end of the outdoor heat exchanger is connected with a valve port d of the four-way valve, a bidirectional restrictor is connected between the outdoor heat exchanger and the indoor heat exchanger, one end of the indoor heat exchanger is connected with a valve port c of the four-way valve, a valve port b of the four-way valve is connected with the gas-liquid separator, and the gas-liquid separator is connected with a turbocharging fan. The application can increase the return air pressure and the return air quantity of the compressor, accelerate the flow of the refrigerant, ensure the return oil of the compressor, and is suitable for the field of air conditioner compressors.

Description

Air return supercharging device of compressor and air conditioning system

Technical Field

The application relates to the field of air conditioner compressors, in particular to a compressor return air supercharging device and an air conditioning system.

Background

With the acceleration of social development and global industrialization and the rising emerging market, the demands of refrigeration and air conditioning equipment in various fields are increasing. Secondly, the living standard of people is continuously improved, and the demands of refrigerating and air-conditioning equipment used in business places and families such as hotels, supermarkets, movie theatres and the like are also continuously increased. The rapid development of the market of refrigeration and air-conditioning equipment is promoted. And grow at an annual growth rate of 5% per year. With the great application of refrigeration and air conditioning equipment, the problem of energy consumption is also of great concern, and the following are exemplified: the power consumption of the household refrigerator is 40%, and the power consumption of the household air conditioner is 50% in summer; the synchronous energy consumption of central air conditioners in public places such as office buildings, markets, supermarkets, subway stations, airports and the like accounts for 70 percent; the commercial power and cold chain freezing energy consumption accounts for 90 percent; the energy consumption of the industrial refrigeration air conditioner accounts for 30 percent. Energy conservation in refrigeration and air conditioning equipment is becoming a growing subject of concern.

The existing compressors used in refrigeration air-conditioning equipment are divided into fixed frequency and variable frequency, and the refrigeration air-conditioning system can be divided into a fixed frequency system and a variable frequency system due to the characteristics of the compressors. The motor speed of the compressor of the fixed-frequency system is constant, the exhaust gas quantity is also constant, the refrigerating capacity of the refrigerating and air-conditioning equipment is constant, and the refrigerating capacity in a certain working range can be met only; the motor speed of the variable frequency system compressor is regulated between 30Hz and 130Hz, the exhaust gas quantity is changed along with the motor speed, and the refrigerating air conditioning equipment can meet the refrigerating capacity of more demands, but the variable frequency compressor is limited by the manufacturing technology and cannot work for a long time above 110Hz, otherwise, the compressor is damaged. When the variable frequency compressor runs at high frequency (over 110 Hz), the current of the compressor rises rapidly along with the increase of the exhaust gas quantity, the temperatures of the compressor motor and the compression mechanical parts rise rapidly, the gas return rate of the system increases obviously, the cooling requirement of the compressor cannot be met, the exhaust gas temperature is easily caused to be too high, and even the compressor motor is burnt.

During operation of the air conditioning system, the lubricant oil of the compressor is discharged from the compressor along with the refrigerant and is circulated back to the compressor, so that the lubricant oil enters and exits at the place where the refrigerant enters and exits. The refrigerant performance and the lubricating oil performance are essentially different, two phases exist in the refrigerant in the system circulation process, namely, liquid refrigerant and gaseous refrigerant, the lubricating oil is basically in a liquid state, when the refrigerant is converted into a gaseous state from a liquid state, the lubricating oil can be separated out from the refrigerant, under the influence of a plurality of factors, the lubricating oil is likely to be stored in a certain part or a certain structural point, so that the lubricating oil cannot smoothly flow back to the compressor, the oil shortage of the compressor is caused, and if the oil shortage is not solved for a long time, the lubrication of moving parts in the compressor is insufficient, and the faults such as dry combustion and the like occur. Especially when heating in winter, because the low ambient temperature (-35 ℃ to minus 10 ℃) is too low, the fixed frequency system and the variable frequency system both have the problems of insufficient return air pressure and insufficient return air quantity of the compressor, the flow rate of the refrigerant in a system pipeline is reduced, lubricating oil stays on the inner wall of the pipeline, the heat exchange quantity is greatly reduced, lubricating oil cannot smoothly return to the compressor, the running current of the compressor is increased, the temperature is increased, the compression ratio is increased, and the running effect of equipment is seriously influenced and limited.

Disclosure of Invention

In order to solve one of the technical defects, an embodiment of the application provides a compressor return air supercharging device and an air conditioning system.

According to a first aspect of the embodiment of the application, there is provided a compressor air return supercharging device, comprising a compressor, wherein an air return port of the compressor is connected with a turbocharging fan, the turbocharging fan comprises an outer tube shell, a double-output-shaft motor is installed in the outer tube shell and is connected with the outer tube shell through a plurality of longitudinal motor fixed supports installed on the inner wall of the outer tube shell, two ends of the outer tube shell are respectively provided with an air inlet tube and an air outlet tube, two output ends of the double-output-shaft motor are respectively opposite to the air inlet tube and the air outlet tube, an air inlet turbine blade is installed on the output end of the double-output-shaft motor opposite to the air outlet tube, and an air outlet turbine blade is installed on the output end of the double-output-shaft motor opposite to the air outlet tube.

Further, the air inlet pipe and the air outlet pipe are respectively connected with the outer pipe shell through the air inlet cover and the air outlet cover, and the air inlet cover and the air outlet cover are all in a structure with small outer opening and large inner opening.

Further, the outer tube shell, the air inlet tube, the air outlet tube, the air inlet cover and the air outlet cover are all refrigerating copper tubes, an air flow channel is formed in a gap between the main body of the double-output-shaft motor and the outer tube shell, the air flow flux of the air flow channel is the same as that of the air inlet tube and the air outlet tube, the turbo-charging fan has a fixed air flow direction, and the air flow direction is along the direction from the air inlet tube to the air outlet tube.

Further, the number of blades of the air inlet turbine blade is five, and the number of blades of the air outlet turbine blade is seven.

An air conditioning system comprises any one of the compressor air return supercharging device, an outdoor heat exchanger, an indoor heat exchanger, a gas-liquid separator and a four-way valve, wherein an exhaust port of the compressor is connected with a valve port a of the four-way valve, one end of the outdoor heat exchanger is connected with a valve port d of the four-way valve, a bidirectional restrictor is connected between the outdoor heat exchanger and the indoor heat exchanger, one end of the indoor heat exchanger is connected with a valve port c of the four-way valve, a valve port b of the four-way valve is connected with an input end of the gas-liquid separator, and an output end of the gas-liquid separator is connected with an air inlet pipe of a turbofan.

Further, a temperature sensor is arranged on the outer wall of the pipeline between the gas-liquid separator and the turbocharging fan.

Further, a pressure sensor is arranged on the outer wall of the pipeline between the turbocharging fan and the compressor.

Further, a high-pressure liquid reservoir is connected between the outdoor heat exchanger and the two-way restrictor.

Further, a drying filter is connected between the two-way restrictor and the high-pressure reservoir.

Further, the double-output shaft motor is a direct-current permanent magnet brushless speed regulating motor, the initial rotating speed of the double-output shaft motor is 6000 revolutions per minute, and the highest rotating speed of the double-output shaft motor is 50000 revolutions per minute.

By adopting the compressor return air supercharging device and the air conditioning system provided by the embodiment of the application, the turbo-charging fan is arranged at the return air port of the compressor to treat the low-temperature low-pressure refrigerant output from the evaporator, so that the return air quantity and the return air efficiency of the compressor are increased, and the return air cooling requirement of the compressor is met; the flow speed and the flow rate of the refrigerant in the pipeline of the refrigeration system are improved, the heat exchange quantity of the unit area of the heat exchanger is increased, and the energy is saved and the efficiency is improved; the refrigerant at the outlet of the evaporator is depressurized on the premise of not changing the pressure of the refrigerant at the exhaust port of the compressor, and the volume of the refrigerant entering from the air return port of the compressor is effectively compressed, so that the refrigerating capacity of the system is obviously improved; meanwhile, the increase of the flow velocity of the refrigerant can promote the recovery of the refrigerant oil of the compressor, and the damage of the compressor is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

Fig. 1 is a schematic structural diagram of a turbo-charged fan according to an embodiment of the present application;

fig. 2 is a schematic cycle diagram of an air conditioning system according to an embodiment of the present application;

The air conditioner comprises a compressor 1, an outdoor heat exchanger 2, an indoor heat exchanger 3, a two-way throttle 4, a gas-liquid separator 5, a high-pressure liquid reservoir 6, a turbo-charging fan 7, an outer pipe shell 70, a double-shaft motor 71, an air inlet turbine blade 72, an air outlet turbine blade 73, a longitudinal motor fixed support 74, an air inlet pipe 75, an air outlet pipe 76, an air outlet pipe 77, an air flow channel 78, a four-way valve 8, a drying filter 9, a temperature sensor 10, a pressure sensor 11, a summer refrigerant flow direction 12 and a winter refrigerant flow direction 13.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of exemplary embodiments of the present application will be given with reference to fig. 1-2, it being apparent that the described embodiments are only some of the embodiments of the present application and not all the embodiments are exhaustive. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

Example 1

In the process of realizing the application, the inventor finds that the compressor used by the refrigeration and air-conditioning equipment is divided into a fixed frequency system and a variable frequency system at present, and the refrigeration and air-conditioning system can be also divided into the fixed frequency system and the variable frequency system due to the characteristics of the compressor. The motor speed of the compressor of the fixed-frequency system is constant, the exhaust gas quantity is also constant, the refrigerating capacity of the refrigerating and air-conditioning equipment is constant, and the refrigerating capacity in a certain working range can be met only; the motor speed of the variable frequency system compressor is regulated between 30Hz and 130Hz, the exhaust gas quantity is changed along with the motor speed, and the refrigerating air conditioning equipment can meet the refrigerating capacity of more demands, but the variable frequency compressor is limited by the manufacturing technology and cannot work for a long time above 110Hz, otherwise, the compressor is damaged. When the variable frequency compressor runs at high frequency (over 110 Hz), the current of the compressor rises rapidly along with the increase of the exhaust gas quantity, the temperatures of the compressor motor and the compressor mechanical parts rise rapidly, the gas return rate of the system increases obviously, the cooling requirement of the compressor cannot be met, and the exhaust gas temperature is easy to be too high and the compressor motor is easy to burn out.

In view of the above problems, as shown in fig. 1 and 2, the embodiment of the application provides a compressor air return supercharging device, which comprises a compressor 1, wherein an air return port of the compressor 1 is connected with a turbo blower 7, the turbo blower 7 comprises an outer tube shell 70, a double-output-shaft motor 71 is installed in the outer tube shell 70, the double-output-shaft motor 71 is connected with the outer tube shell 70 through a plurality of longitudinal motor fixing supports 74 installed on the inner wall of the outer tube shell 70, the longitudinal motor fixing supports 74 are made of aluminum alloy, a motor main body is firmly fixed in the center of a tube shell 70, two ends of the outer tube shell 70 are respectively provided with an air inlet tube 75 and an air outlet tube 76, two output ends of the double-output-shaft motor 71 are respectively opposite to the air inlet tube 75 and the air outlet tube 76, an air inlet turbine fan 72 is installed on the output end of the double-output-shaft motor 71 opposite to the air outlet tube 76, and an air outlet turbine fan 73 is installed on the output end of the double-output-shaft motor 71 opposite to the air outlet tube 76.

Specifically, the outer tube housing 70, the air inlet tube 75 and the air outlet tube 76 are made of refrigeration copper tubes, so that the welding is convenient during installation.

In specific implementation, the dual-output-shaft motor 71 is started to drive the air inlet turbine fan blade 72 and the air outlet turbine fan blade 73 to rotate, and the low-temperature low-pressure gaseous refrigerant firstly passes through the turbo-charging fan 7 before entering the air return port of the compressor 1, and the rotating air inlet turbine fan blade 72 forms suction force at the air inlet pipe 75, so that on one hand, the flow speed and the flow rate of the refrigerant are accelerated, and on the other hand, the refrigerant in a gas-liquid mixed state in the evaporator is accelerated to be gasified, and the air return efficiency is further improved; simultaneously, the air outlet turbine blades 73, which are coaxial with the air inlet turbine blades 72, rotate, compress the refrigerant entering the outer tube housing 70, then discharge the refrigerant from the air outlet tube 76, and the refrigerant with increased pressure enters the compressor 1 from the air return port of the compressor 1.

By adopting the compressor return air supercharging device provided by the embodiment, the turbo-charging fan is arranged at the air return opening of the compressor, so that the refrigerant is processed by the turbo-charging fan before entering the compressor, on one hand, the air return amount and the air return efficiency at the air return opening of the compressor are increased to meet the cooling requirement of the compressor, on the other hand, the flow speed and the flow quantity of the refrigerant in a pipeline of a refrigerating system are improved, the heat exchange amount of the unit area of the evaporator and the condenser is increased, and the effects of efficiency improvement and energy saving are achieved; meanwhile, the turbine booster fan can reduce the pressure of the refrigerant at the outlet of the evaporator on the premise of not changing the pressure of the refrigerant at the exhaust port of the compressor, and effectively compress the volume of the refrigerant entering from the air return port of the compressor, so that the refrigerating capacity of the system is obviously improved.

As a preferable scheme, in actual installation, since the turbo-charging fan 7 is additionally installed on the air return pipeline of the compressor 1, the pipe diameters of the air inlet pipe 75 and the air outlet pipe 76 of the turbo-charging fan 7 are required to be consistent with the pipe diameters of the air return port of the compressor 1, the outer pipe casing 70 is tubular, the pipe diameters of the outer pipe casing 70 are slightly larger than those of the air inlet pipe 75 and the air outlet pipe 76, the air inlet pipe 75 and the air outlet pipe 76 are respectively connected with the outer pipe casing 70 through an air inlet cover and an air outlet cover, and the air inlet cover and the air outlet cover are all in a structure with small outer port and large inner port.

Specifically, the outer tube shell 70, the air inlet tube 75, the air outlet tube 76, the air inlet cover and the air outlet cover can all be refrigeration copper tubes, so that welding is convenient during installation; the gap between the main body of the double-output shaft motor 71 and the outer tube housing 70 forms an air flow passage 77, the air flow passage 77 has the same air flow rate as the air flow rate of the air inlet tube 75 and the air outlet tube 76, and the turbo-charged fan 7 has a fixed air flow direction 78, and the air flow direction 78 is along the direction from the air inlet tube 75 to the air outlet tube 76.

In specific implementation, low-temperature low-pressure refrigerant enters from the air inlet pipe 75, the blades of the air inlet turbine fan blade 72 generate an oblique flow, the oblique flow can enable the refrigerant to flow from one side of the impeller to the other side, so that an impelling force is generated, a larger air inflow is generated at the air inlet pipe 75, the impelling force generated by the air inlet turbine fan blade 72 accelerates the refrigerant, the refrigerant flows from the air flow channel 77 to the air outlet pipe 76 along the air flow direction 78, the air outlet turbine fan blade 73 compresses the accelerated refrigerant, the air outlet cover serves as a connecting piece of the outer pipe shell 70 and the air outlet pipe 76, meanwhile, the air outlet turbine fan blade 73 is contained, the design that the outer opening is small and the inner opening is large can assist the air outlet turbine fan blade 73 to compress the refrigerant entering the air outlet pipe 76 from the outer pipe shell 70, and the refrigerant is pressurized.

As a preferred solution, the number of blades of the inlet turbine blades 72 may be five, so that the flow amount of the inlet refrigerant gas may be effectively increased, and the number of blades of the outlet turbine blades 73 may be seven, so that the flow speed and the pressure of the outlet refrigerant gas may be further effectively increased. Specifically, the air inlet turbine blade 72 may be an aluminum alloy high-pressure type worm wheel blade, and the air outlet turbine blade 73 may be an aluminum alloy high-pressure type blade.

In the implementation, because of practical equipment reasons, the pipe diameters of the air inlet pipe 75 and the air outlet pipe 76 are limited to be consistent with the pipe diameter of an air return port pipeline of the compressor 1, and on the premise that the channel sectional areas of the air inlet pipe 75 and the air outlet pipe 76 are the same, the air inlet turbine blades 72 with a small number of blades are arranged, so that the sectional area of the channel of the air inlet pipe 75 occupied by the air inlet turbine blades 72 can be reduced, and the flow of the refrigerant entering the air inlet pipe 75 is increased;

In the normal working state, the return air quantity of the compression disc (air cylinder) in unit time of the compressor 1 is constant, the return air quantity of the compressor 1 cannot be effectively increased by simply increasing the flow rate of the refrigerant entering the return air port, and the return air quantity of the compressor 1 can be effectively increased only by compressing the volume of the refrigerant after the increment and then entering the compressor 1, so that the air outlet turbine fan blades 73 are designed at the air outlet pipe 76;

In order to further compress the volume of the turbo-charging fan 7 and control the manufacturing cost, the dual-output motor 71 is adopted to simultaneously link the air inlet turbine blades 72 and the air outlet turbine blades 73, but in this way, the speeds of the air outlet turbine blades 73 and the air inlet turbine blades 72 are identical, if the speeds of the air outlet turbine blades 73 and the air inlet turbine blades 72 are also identical, the speed of the dual-output motor 71 can be increased to achieve supercharging, but the speed of the dual-output motor 71 is too fast to increase the loss of the fan itself, so that the failure rate of the dual-output motor is high, the service life of the turbo-charging fan 7 is greatly reduced, and therefore, the air outlet turbine blades 73 with more blades are arranged at the air outlet pipe 76, and on the premise of not changing the speed of the dual-output motor 71, higher torque can be provided for the air outlet turbine blades 73 by slightly increasing the output power of the dual-output motor 71, so that the refrigerant passing through the air outlet turbine blades 73 can be more compressed under the condition of ensuring the flow. The turbo-charged fan provided in the embodiment utilizes the characteristics of small volume, low running power and high output gas pressure of the turbo-charged fan to design a unique air return and pressurization function of the compressor of the refrigeration air conditioning equipment, has the advantages of simple structure, low energy consumption, large adjustment range, large air return and pressurization of the compressor, obvious energy efficiency increase and the like, can be easily connected in a refrigeration air conditioning pipeline system, is widely applied to the air return system of the compressor of the refrigeration air conditioning equipment, and can become an important part for realizing energy conservation and synergy of the refrigeration air conditioning system.

Example two

In carrying out the present application, the inventors have found that during operation of an air conditioning system, lubricant from the compressor is discharged from the compressor along with the refrigerant and circulated back to the compressor, and there is ingress and egress of lubricant where there is ingress and egress of refrigerant. The refrigerant performance and the lubricating oil performance are essentially different, two phases exist in the refrigerant in the system circulation process, namely, liquid refrigerant and gaseous refrigerant, the lubricating oil is basically in a liquid state, when the refrigerant is converted into a gaseous state from a liquid state, the lubricating oil can be separated out from the refrigerant, under the influence of a plurality of factors, the lubricating oil is likely to be stored in a certain part or a certain structural point, so that the lubricating oil cannot smoothly flow back to the compressor, the oil shortage of the compressor is caused, and if the oil shortage is not solved for a long time, the lubrication of moving parts in the compressor is insufficient, and the faults such as dry combustion and the like occur. Especially when heating in winter, because the low ambient temperature (-35 ℃ to minus 10 ℃) is too low, the fixed frequency system and the variable frequency system both have the problem that the air return pressure and the air return quantity of the compressor are insufficient, the flow rate of the refrigerant in the system pipeline is reduced, the lubricating oil stays on the inner wall of the pipeline, the heat exchange quantity is greatly reduced, the lubricating oil can not smoothly return to the compressor, the running current of the compressor is increased, the temperature is increased, the compression ratio is increased, and the running effect of equipment is seriously influenced and limited.

In view of the above problems, this embodiment provides an air conditioning system, including any one of the compressor return air supercharging device, the outdoor heat exchanger 2, the indoor heat exchanger 3, the gas-liquid separator 5 and the four-way valve 8 in embodiment one, the four-way valve 8 has a, b, c, d interfaces, the exhaust port of the compressor 1 is connected with the valve port a of the four-way valve 8, one end of the outdoor heat exchanger 2 is connected with the valve port d of the four-way valve 8, the bidirectional restrictor 4 is connected between the outdoor heat exchanger 2 and the indoor heat exchanger 3, the bidirectional restrictor 4 is automatically regulated by a conventional control circuit or a component temperature sensing bag, the original working state of the refrigeration equipment is maintained, the turbocharging fan 7 greatly increases the refrigerating capacity of the refrigeration equipment by only increasing the flow speed and the flow rate of the refrigerant in the system, one end of the indoor heat exchanger 3 is connected with the valve port c of the four-way valve 8, the valve port b of the four-way valve is connected with the input end of the gas-liquid separator 5, the output end of the gas-liquid separator 5 is connected with the air inlet pipe 75 of the turbocharging fan 7, when the system is in use, the outdoor heat exchanger 2 is used as the condenser 2, the indoor heat exchanger 3 is used as the evaporator 2, and when the indoor heat exchanger is used as the evaporator 2, and the outdoor heat exchanger is used as the evaporator 2.

In specific implementation, as shown in fig. 2, taking refrigeration of an air conditioning system in summer as an example (refer to a refrigerant flowing direction 12 in summer), a high-pressure gas refrigerant is discharged from a high-pressure exhaust port of the compressor 1, passes through a valve port a and a valve port d of the four-way valve 8, enters the outdoor heat exchanger 2, after heat exchange between the refrigerant in the outdoor heat exchanger 2 and outdoor air is completed, a high-temperature high-pressure liquid refrigerant is obtained, a low-temperature low-pressure gas-liquid mixed state refrigerant is throttled by the two-way throttle valve 4, and enters the indoor heat exchanger 3, after heat exchange between the refrigerant in the indoor heat exchanger 3 and indoor air is completed, a low-temperature low-pressure gas refrigerant is obtained, passes through a valve port c and a valve port b of the four-way valve 8, enters the turbo-booster fan 7 for boosting, and returns to a gas return port of the compressor 1, so that a refrigeration cycle is completed; by adjusting the four-way valve 8 to realize the alternation of the cooling and heating functions, the refrigerant cycle is as follows when the air conditioning system heats in winter (refer to the refrigerant flow direction 13 in winter): the device comprises a compressor 1, a four-way valve 8, an indoor heat exchanger 3, a bidirectional restrictor 4, an outdoor heat exchanger 2, a four-way valve 8, a turbo-charging fan 7 and the compressor 1.

The compressor also discharges a small amount of lubricating oil when discharging the refrigerant. Even with an oil loading of only 0.5%, if the oil cannot be recycled back to the compressor through the system, if for example 5HP is about 330kg/h at ARI, the oil in the compressor can be carried out in 50 minutes and the compressor will burn out in about 2 to 5 hours.

The lubricating oil circulates along with the refrigerant in the circulating process of the air conditioning system, the refrigerant is converted into a gas state from a liquid state when the refrigerant is condensed through the condenser, the lubricating oil is separated out from the refrigerant, part of the lubricating oil stays in the condenser pipeline, part of the lubricating oil enters the gas-liquid separator together with the refrigerant to be stored, the lubricating oil flows back into the compressor through an oil return hole of the gas-liquid separator, suction is generated in the air inlet pipe when the turbocharging fan works, and the flow speed and the flow quantity of the refrigerant in the condenser are accelerated, so that the lubricating oil remained on the inner wall of the condenser pipeline can smoothly return to the compressor.

As a preferred solution, a temperature sensor 10 is arranged on the outer wall of the pipeline between the gas-liquid separator 5 and the turbo charger 7.

In specific implementation, the preset value temperature of the refrigerant entering the turbocharging fan 7 is set as T1, the actual temperature read by the temperature sensor 10 is set as T2, after the operation of the air conditioning system is stable, the actual temperature T2 of the refrigerant entering the turbocharging fan 7 in continuous time is detected, the actual temperature T2 is compared with the preset value temperature T1, when the actual temperature T2 is higher than the preset value temperature T1, the fact that the heat absorption capacity of the refrigerant in the evaporator is lower is indicated, the refrigerating capacity of the air conditioning system is insufficient, certain acceleration is needed to be carried out on the circulation of the refrigerant, the output power of the turbocharging fan 7 is controlled, the flow and the flow velocity of the refrigerant are increased until the actual temperature T2 is gradually reduced, and finally the refrigerant is stabilized at the value of the preset value temperature T1; when the actual temperature T2 is lower than the preset value temperature T1, it indicates that the heat absorption of the refrigerant in the evaporator is high, the refrigerating capacity of the air conditioning system is excessive, the circulation of the refrigerant needs to be inhibited to a certain extent, the output power of the turbocharging fan 7 is controlled, the flow and the flow velocity of the refrigerant are reduced until the actual temperature T2 gradually rises, and finally the refrigerant is stabilized at the value of the preset value temperature T1.

Alternatively, a pressure sensor 11 is provided on the outer wall of the line between the turbo blower 7 and the compressor 1.

In specific implementation, the preset value pressure of the refrigerant entering the compressor 1 is set as P1, the actual pressure read by the pressure sensor 11 is set as P2, after the air conditioning system is stable in operation, the actual pressure P2 of the refrigerant entering the compressor 1 in continuous time is detected, the actual pressure P2 is compared with the preset value pressure P1, when the actual pressure P2 is higher than the preset value pressure P1, the air return pressure of the compressor 1 is too high, the output power of the turbofan 7 is controlled, the pressure of the refrigerant output by the turbofan 7 is reduced until the actual pressure P2 is gradually reduced, and finally the air conditioning system is stable at the value of the preset value pressure P1; when the actual pressure P2 is lower than the preset pressure P1, it indicates that the return air pressure of the compressor 1 is too low, the output power of the turbo-charging fan 7 is controlled, the pressure of the refrigerant output by the turbo-charging fan 7 is increased until the actual pressure P2 is gradually increased, and finally the value of the preset pressure P1 is stabilized.

The two methods can be used for controlling one of the two methods independently or in combination by controlling the running efficiency of the turbocharging fan so as to regulate the air return quantity and the air return pressure of the compressor.

As a preferable mode, a high-pressure accumulator 6 is connected between the outdoor heat exchanger 2 and the two-way throttle 4, and liquid refrigerant flowing out of the condenser is stored, so that the heat transfer area is reduced and the heat transfer effect of the condenser is prevented from being affected due to excessive accumulation of the liquid refrigerant in the condenser.

As a preferred solution, a bidirectional dry filter 9 is connected between the bidirectional throttle 4 and the high-pressure reservoir 6, filtering impurities of the fluid and absorbing moisture, preventing the filtered and soluble substances from entering the air conditioning system.

As a preferable scheme, the double-output-shaft motor 71 is a direct-current permanent magnet brushless speed-regulating motor, the initial rotating speed of the double-output-shaft motor 71 is 6000 rpm, and the highest rotating speed of the double-output-shaft motor 71 is 50000 rpm. The compressor return air quantity and return air pressure can be further adjusted by controlling the output power of the double-output shaft motor 71.

In this embodiment, the dual-output motor 71 is a dc permanent magnet brushless speed-regulating motor with a higher rotation speed, which inevitably generates high temperature and heat during operation, but in this embodiment, on one hand, the low-temperature low-pressure refrigerant output from the evaporator outlet enters the dual-output motor 71 to cool the dual-output motor, so as to avoid overheating of the dual-output motor 71; on the other hand, in the present embodiment, it is not necessary to add lubricating oil to the double-output motor 71 separately, the lubricating oil of the compressor circulates together with the refrigerant, and the lubricating oil enters the double-output motor 71 together with the refrigerant at low temperature and low pressure to lubricate the motor shaft, thereby preventing the double-output motor 71 from burning out.

The compressor air return supercharging device and the air conditioning system provided in the embodiment can be applied to the field of air conditioning and the field of air return supercharging of compressors such as refrigeration.

The application provides a compressor return air supercharging device and an air conditioning system, which creatively designs a turbocharging fan with small volume, low running power and high output gas pressure, and the turbocharging fan is arranged at a return air port of a compressor to treat low-temperature low-pressure refrigerant output from an evaporator, so that on one hand, the return air quantity and the return air efficiency of the compressor are increased, and the return air cooling requirement of the compressor is met; on the other hand, the flow speed and the flow of the refrigerant in the pipeline of the refrigeration system are improved, the heat exchange quantity of the unit area of the evaporator and the unit area of the condenser are increased, and the efficiency and the energy conservation are improved; on the premise of not changing condensation pressure, the refrigerant at the outlet of the evaporator is depressurized, and the volume of the refrigerant entering from the air return port of the compressor is effectively compressed, so that the refrigerating capacity of the system is obviously improved; the flow speed and the flow rate of the refrigerant in the evaporator pipeline are increased, and meanwhile, the refrigerating oil is driven to quickly flow back to the compressor, so that the oil return of the compressor is ensured. The compressor return air supercharging device and the air conditioning system provided by the application can be widely applied to various refrigeration equipment, various air conditioning hosts and air energy heating host systems, and have strong practicability.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, in the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. The utility model provides a compressor return air supercharging device, its characterized in that, includes compressor (1), the return air mouth of compressor (1) is connected with turbo charger fan (7), turbo charger fan (7) include outer tube casing (70), install two play axle motor (71) in outer tube casing (70), two play axle motor (71) are through a plurality of vertical motor fixed bolster (74) of installing on outer tube casing (70) inner wall with outer tube casing (70) link to each other, intake pipe (75) and outlet duct (76) have been seted up respectively at the both ends of outer tube casing (70), two output of two play axle motor (71) are just to intake pipe (75) and outlet duct (76) respectively, two play axle motor (71) just to install air inlet turbine (72) on the output of intake pipe (75), two play axle motor (71) just are right to install on the output of outlet duct (76) and go out air turbine flabellum (73).

2. The compressor return air supercharging device according to claim 1, wherein the air inlet pipe (75) and the air outlet pipe (76) are connected with the outer pipe shell (70) through an air inlet cover and an air outlet cover respectively, and the air inlet cover and the air outlet cover are all in a structure with small outer opening and large inner opening.

3. The compressor return air supercharging device according to claim 2, wherein the outer tube housing (70), the air inlet tube (75), the air outlet tube (76), the air inlet cover and the air outlet cover are all refrigerating copper tubes, a gap between a main body of the double-output shaft motor (71) and the outer tube housing (70) forms an air flow channel (77), the air flow rate of the air flow channel (77) is the same as the air flow rate of the air inlet tube (75) and the air flow rate of the air outlet tube (76), the turbo-charging fan (7) has a fixed air flow direction (78), and the air flow direction (78) is along the direction from the air inlet tube (75) to the air outlet tube (76).

4. The compressor return air supercharging device according to claim 1, characterized in that the number of blades of the inlet turbine blade (72) is five and the number of blades of the outlet turbine blade (73) is seven.

5. An air conditioning system, characterized by comprising a compressor return air supercharging device, an outdoor heat exchanger (2), an indoor heat exchanger (3), a gas-liquid separator (5) and a four-way valve (8) according to any one of claims 1-4, wherein an exhaust port of the compressor (1) is connected with a valve port a of the four-way valve (8), one end of the outdoor heat exchanger (2) is connected with a valve port d of the four-way valve (8), a bidirectional restrictor (4) is connected between the outdoor heat exchanger (2) and the indoor heat exchanger (3), one end of the indoor heat exchanger (3) is connected with a valve port c of the four-way valve (8), a valve port b of the four-way valve is connected with an input end of the gas-liquid separator (5), and an output end of the gas-liquid separator (5) is connected with an air inlet pipe (75) of a turbocharging fan (7).

6. An air conditioning system according to claim 5, characterized in that a temperature sensor (10) is arranged on the outer wall of the pipeline between the gas-liquid separator (5) and the turbo charger fan (7).

7. An air conditioning system according to claim 6, characterized in that a pressure sensor (11) is arranged on the outer wall of the pipeline between the turbo charger fan (7) and the compressor (1).

8. An air conditioning system according to claim 5, characterized in that a high-pressure reservoir (6) is connected between the outdoor heat exchanger (2) and the two-way restriction (4).

9. An air conditioning system according to claim 8, characterized in that a drier-filter (9) is connected between the two-way restriction (4) and the high-pressure reservoir (6).

10. The air conditioning system according to claim 5, characterized in that the double-output-shaft motor (71) is a dc permanent magnet brushless speed motor, the initial rotation speed of the double-output-shaft motor (71) is 6000 rpm, and the maximum rotation speed of the double-output-shaft motor (71) is 50000 rpm.