CN104964473B - A kind of energy-saving freezing depth dehumidified air processing method - Google Patents

Abstract

The invention belongs to Refrigeration ＆ Air-Conditioning technical field, it is related to a kind of energy-saving freezing depth dehumidified air processing method, pending air flows out into conditioning section from air pretreatment section, processed air is first cooled by heat pipe cold recovery with evaporator group, then colod-application heat exchanger group is prefabricated again further to cool down, then liquid water droplets are removed through preceding water fender with after evaporator group further cooling by heat pump cycle, again the liquid water droplets carried secretly in air are removed after freeze drying kind of refrigeration cycle carries out depth cooling with evaporator through rear water plate, flow through after freeze drying kind of refrigeration cycle heated with condenser, air sequentially enters air inlet post processing section after two phase flow cold recovery is further heated using condenser group and heat pump cycle condenser group, complete the conditioning processing procedure of air；Its technique is simple, easy to operate, and cost is low, less energy consumption, and energy utilization rate is high, and refrigerated dehumidification efficiency high is environment-friendly.

Description

An energy-saving refrigeration deep dehumidification air treatment method

Technical field:

The invention belongs to the technical field of refrigeration and air conditioning, and relates to an air conditioning system formed by organically combining internal and external composite gas-liquid two-phase flow heat pipe cooling energy recovery technology, internal and external composite heat pump energy saving technology, and multi-stage composite refrigeration depth dehumidification technology. A treatment device, in particular a high-efficiency and energy-saving refrigeration deep dehumidification air treatment method.

Background technique:

At present, many production processes in industries such as pharmaceuticals, electronics, and textiles must have a low-humidity technological air-conditioning environment throughout the year, and the air treatment process that achieves low humidity in summer often consumes a lot of energy; convection drying (also known as airflow drying) ) is the most widely used drying method in industrial and agricultural production processes. To achieve convective drying, there must be a low-humidity dry air source, and providing this low-humidity air source often requires a lot of energy consumption. The existing treatment methods for realizing air dehumidification mainly include freezing dehumidification method and rotary dehumidification method. The commonly used freezing dehumidification method uses 7-12°C refrigerated water as a refrigerant to cool the treated air. The dew point temperature is generally above 14°C, but it cannot meet the low temperature and low humidity air treatment requirements; although the rotary dehumidification method can achieve a very low machine dew point temperature and meet the low humidity air treatment requirements, the energy consumption of the treatment process is huge.

In order to achieve a more thorough dehumidification of the air and reduce the energy consumption of the dehumidification process, in recent decades, people have adopted direct expansion refrigeration dehumidification methods, such as various small refrigeration dehumidifiers, small refrigeration temperature and humidity control machines, etc. The machine dew point temperature that can be achieved by dehumidification treatment air is reduced from above 14°C to above 10°C, and the depth of dehumidification has increased, but it still cannot meet the machine dew point temperature requirements of many production processes. The invention patent with the patent number ZL201210290885.4 proposed by the applicant discloses an energy-saving air treatment method with temperature and humidity regulation, which uses the internal and external compound two-phase flow heat pipe cooling capacity recycling technology, parallel compound compression refrigeration technology, The energy consumption of the air conditioning system formed by the organic combination of internal and external composite heat pump energy-saving technologies is only 1/5-1/3 of that of the air-conditioning system using the dehumidification method of the tumbler cage, and it enables the dew point temperature of the machine to be stably controlled at 4°C for a long time , has a significant energy-saving effect, and can meet the machine dew point temperature requirements of general industrial systems, but this technology cannot meet the machine dew point temperature required by many special production processes below 4°C, and sometimes even requires as low as -25°C.

Invention content:

The purpose of the present invention is to overcome the shortcomings of the prior art, seek to design and provide an air treatment method for energy-saving refrigeration and deep dehumidification, and solve the problem of huge energy consumption in the low-humidity air treatment process in the prior art.

In order to achieve the above object, the present invention is implemented in an energy-saving deep-frozen dehumidification air treatment device. The specific process is: under the action of the fan, the air to be treated flows out from the air pretreatment section and enters the temperature and humidity adjustment section. In the temperature and humidity control section, the treated air is first cooled by the evaporator group for heat pipe cooling recovery in the internal and external composite two-phase flow heat pipe cooling recovery subsystem, and then cooled by the heat exchanger subsystem for pre-cooling The heat exchanger group for pre-cooling is further cooled, and then further cooled by the evaporator group for the heat pump cycle of the internal and external composite heat pump cycle subsystem. The air at the dew point temperature passes through the front water shield to remove liquid water droplets, and then goes through 2-10 refrigerating, dehumidifying and refrigerating cycles of the multi-stage composite refrigerating, dehumidifying and refrigerating cycle subsystem for deep cooling with the evaporator, and the treated air finally reaches the second The dew point temperature is as low as -25°C. Afterwards, the air passes through the rear fender to remove the liquid water droplets entrained in the air, and then flows through 2-10 condensers for refrigeration, dehumidification and refrigeration cycles in the multi-stage composite refrigeration, dehumidification and refrigeration cycle subsystem. After heating, the air temperature is heated from the second dew point temperature to 4-12°C, and then the air enters the two-phase flow cooling recovery and utilization condenser group to be further heated to 12-20°C, and finally enters the heat pump cycle subsystem of the heat pump cycle for condensation After the air reaches the set air supply temperature, it enters the air after-treatment section to complete the air temperature and humidity adjustment process; among them, the central control subsystem adjusts the pre-cooling heat exchanger subsystem and the heat pump circulation sub-system. The cooling capacity of the system controls the first dew point temperature to achieve the goal of cooling and preliminary dehumidification; the central control subsystem controls the second dew point temperature by adjusting the cooling capacity of the multi-stage compound refrigeration dehumidification refrigeration cycle subsystem to achieve deep dehumidification and accurate control of relative humidity. Humidity target; and then by adjusting the amount of heat exhausted in the heat pump circulation subsystem and the number of working units of the heat pump circulation subsystem without heat dissipation, the outlet air temperature is controlled to achieve the goal of temperature regulation.

The main structure of the energy-saving refrigerated deep dehumidification air treatment device of the present invention includes an internal and external composite gas-liquid two-phase flow heat pipe cooling capacity recovery, a heat exchanger for pre-cooling, an internal and external composite heat pump cycle, and a multi-stage composite refrigeration dehumidification refrigeration cycle And the central control five subsystems, the internal and external composite gas-liquid two-phase flow heat pipe cooling capacity recovery subsystem includes the evaporator group for heat pipe cooling capacity recovery and the condenser group for heat pipe cooling capacity recovery, and the two evaporator groups for heat pipe cooling capacity recovery The two ends are respectively connected with the temperature and humidity regulation section and the heat exchanger group for pre-cooling, and the front end of the temperature and humidity regulation section is connected with the air pretreatment section; the heat exchanger subsystem for pre-cooling includes the heat exchanger group for pre-cooling, pre-cooling The inner and outer connecting pipes of the heat exchanger for cooling and the outdoor unit of the heat exchanger for pre-cooling; the upper end of the heat exchanger group for pre-cooling communicates with the outdoor unit of the heat exchanger for pre-cooling through the inner and outer connecting pipes of the heat exchanger for pre-cooling; The internal and external compound heat pump cycle subsystem includes the evaporator group for the heat pump cycle and the condenser group for the heat pump cycle; There is a first dew point temperature sensor at the rear end of the water baffle, and the first dew point temperature sensor is connected with the electrical information of the central controller through the signal line of the first dew point temperature sensor; The dehumidification and refrigeration cycle is arranged in series and parallel composite structure. The structure and size of 2-10 refrigeration, dehumidification and refrigeration cycles are exactly the same. According to the direction of airflow, the evaporators of 2-10 refrigeration, dehumidification and refrigeration cycles are arranged in parallel. 2 -10 refrigerating, dehumidifying and refrigerating cycle condensers are arranged in series, and each refrigerating, dehumidifying and refrigerating cycle includes a liquid supply pipe for the evaporator of the refrigerating, dehumidifying and refrigerating cycle, a defrosting solenoid valve for the refrigerating, dehumidifying and refrigerating cycle, a throttle valve for the refrigerating, dehumidifying and refrigerating cycle, and Dehumidification and refrigeration cycle defrosting steam pipe, freezing and dehumidification and refrigeration cycle drying filter, freezing and dehumidification and refrigeration cycle liquid storage tank, liquid return pipe, freezing and dehumidification and refrigeration cycle return air temperature sensor, freezing and dehumidification and refrigeration cycle evaporator water tray, freezing and dehumidification and refrigeration Circulation return pipe, refrigerating and dehumidifying refrigerating cycle compressor, refrigerating and dehumidifying refrigerating cycle exhaust main solenoid valve, refrigerating and dehumidifying refrigerating cycle exhaust main pipe, evaporator for refrigerating and dehumidifying refrigerating cycle and condenser for refrigerating and dehumidifying refrigerating cycle, refrigerating and dehumidifying and refrigerating The rear side of the evaporator for refrigeration and dehumidification refrigeration cycle is equipped with a rear regulating air valve for the condenser of the refrigeration dehumidification refrigeration cycle. The liquid supply pipe of the evaporator of the refrigerating and dehumidifying refrigeration cycle, the defrosting steam pipe of the refrigerating and dehumidifying and refrigerating cycle, the liquid return pipe, the return pipe of the refrigerating and dehumidifying and refrigerating cycle, and the exhaust main pipe of the refrigerating and dehumidifying and refrigerating cycle are connected with the condenser pipes for the refrigerating, dehumidifying and refrigerating cycle. The dehumidification refrigeration cycle compressor sucks low-pressure steam from the evaporator of the refrigeration dehumidification refrigeration cycle through the return air pipe of the refrigeration dehumidification refrigeration cycle, and the exhaust gas of the refrigeration dehumidification refrigeration cycle compressor is sent to the defrosting steam pipe of the refrigeration dehumidification refrigeration cycle and the exhaust gas of the refrigeration dehumidification refrigeration cycle. The gas main pipe, the liquid supply pipe and the liquid return pipe of the refrigerating and dehumidifying refrigeration cycle evaporator are connected in series, Between the liquid supply pipe and the liquid return pipe of the refrigerating and dehumidifying refrigerating cycle evaporator, a refrigerating and dehumidifying refrigerating cycle throttling valve, a refrigerating and dehumidifying refrigerating cycle drying filter and a refrigerating, dehumidifying and refrigerating cycle liquid storage tank are arranged in sequence from front to back. The frost steam pipe is equipped with a defrosting solenoid valve for the freezing, dehumidification and refrigeration cycle, and the pipeline between the return air pipe of the refrigeration and dehumidification refrigeration cycle and the exhaust main pipe of the refrigeration, dehumidification and refrigeration cycle is provided with a temperature sensor for the return air of the refrigeration, dehumidification and refrigeration cycle, and a temperature sensor for the refrigeration, dehumidification and refrigeration cycle. Circulating compressor and solenoid valve for exhaust main pipe of refrigeration, dehumidification and refrigeration cycle; the front end of the first condenser for refrigeration, dehumidification and refrigeration cycle is provided with a rear water baffle, between the rear water shield and the first condenser for refrigeration, dehumidification and refrigeration cycle There is a second dew point temperature sensor between them; the rear side of the last condenser for refrigeration, dehumidification and refrigeration cycle is equipped with a condenser group for heat pipe cooling recovery, a condenser group for heat pump cycle, a fan and an air post-treatment section, and the air post-treatment There are air outlet temperature and humidity sensors and air outlet wind speed and air volume sensors in the section; the central control subsystem includes the central controller, the control line of the defrosting solenoid valve of the freezing and dehumidification refrigeration cycle, the signal line of the return air temperature sensor of the refrigeration, dehumidification and refrigeration cycle, and the first dew point Temperature sensor signal line, refrigeration dehumidification refrigeration cycle evaporator post-regulation air valve control line, refrigeration dehumidification refrigeration cycle compressor control line, refrigeration dehumidification refrigeration cycle exhaust master solenoid valve control line, second dew point temperature sensor signal line, fan air volume Adjustment control line, air outlet temperature and humidity sensor signal line and air outlet air speed and air volume sensor signal line, freezing and dehumidification refrigeration cycle defrost solenoid valve, refrigeration dehumidification refrigeration cycle return air temperature sensor, first dew point temperature sensor, refrigeration dehumidification refrigeration cycle evaporator Rear adjustment damper, refrigeration dehumidification refrigeration cycle compressor, refrigeration dehumidification refrigeration cycle exhaust main pipe solenoid valve, second dew point temperature sensor, fan, air outlet temperature and humidity sensor and air outlet air speed and air volume sensor respectively defrost through the refrigeration dehumidification refrigeration cycle Solenoid valve control line, refrigerating and dehumidifying refrigeration cycle return air temperature sensor signal line, first dew point temperature sensor signal line, refrigerating, dehumidifying and refrigerating cycle evaporator air valve control line, refrigerating and dehumidifying refrigerating cycle compressor control line, refrigerating and dehumidifying refrigerating cycle The exhaust main pipe electromagnetic valve control line, the second dew point temperature sensor signal line, the fan air volume adjustment control line, the air outlet temperature and humidity sensor signal line, and the air outlet air speed and air volume sensor signal line are connected to the central controller for electrical information.

The internal and external composite two-phase flow heat pipe cooling capacity recycling subsystem of the present invention and the internal and external composite two-phase flow heat pipe cooling capacity recycling subsystem in an energy-saving temperature and humidity regulation air treatment method disclosed in the invention patent ZL201210290885.4 same.

The heat exchanger subsystem for pre-refrigeration described in the present invention is the same parallel compound compression refrigeration subsystem as in the energy-saving temperature and humidity regulation air treatment method disclosed in patent ZL201210290885. The heat exchanger subsystem constituted by the cooler, the heat exchanger for pre-refrigeration can efficiently discharge the excess heat in the air conditioning circulation system under the hottest working conditions in summer.

The heat pump circulation subsystem of the present invention is similar to the heat pump circulation subsystem in an energy-saving temperature and humidity control air treatment method disclosed in the invention patent ZL201210290885.4, including internal and external composite heat pump circulation with heat removal and internal and external composite without There are two types of heat-exhausting heat pump cycle. The cooling capacity of the evaporator of the heat pump cycle subsystem is used to further cool the pre-cooled air to reach the first dew point temperature to achieve efficient cooling and dehumidification. It is used to heat the low-temperature and low-humidity air after reaching the second dew point temperature, so that the temperature of the air outlet in the temperature and humidity adjustment section reaches the set requirements, and the other part of the excess heat is discharged to the external environment through the outdoor condenser to realize the temperature and humidity adjustment section. Energy balance control.

The working principle of the multi-stage composite freezing, dehumidification and refrigeration cycle subsystem of the present invention is: the evaporator for the refrigeration, dehumidification and refrigeration cycle further realizes deep cooling and dehumidification of the air reaching the dew point temperature of the first machine, so that the processed air finally reaches a very low temperature. The dew point temperature of the second machine (the lowest can reach -25 ℃), and the heat exhausted by the condenser in the refrigeration dehumidification and refrigeration cycle is used to heat the low-temperature and low-humidity air after reaching the second dew point temperature, so as to realize the high efficiency of cold and heat energy at the same time Utilization; the purpose of adopting multi-stage compounding is to ensure that when defrosting and deicing treatment is performed in one of the first-stage refrigeration and dehumidification refrigeration cycles, the remaining refrigeration, dehumidification and refrigeration cycles can still meet the requirements of deep cooling and dehumidification through the working mode of rotation.

The working principle of the central control subsystem of the present invention is as follows: the air supply temperature is obtained by the air outlet temperature and humidity sensor arranged in the temperature and humidity adjustment section, and the central controller controls the outdoor condenser fan in the heat pump circulation subsystem (see The speed control of the patent ZL201210290885.4) is used to change the heat discharged to the outside, and realize the adjustment of the outlet air temperature of the temperature and humidity adjustment section. If the fan speed of the outdoor condenser is adjusted to the limit and still cannot meet the adjustment requirements of the air supply temperature, further automatic adjustment will be made. The operating frequency of the compressor in the heat pump cycle subsystem with heat rejection completes the adjustment of the air supply temperature. The specific process is disclosed in ZL201210290885.4; 1 Dew point temperature sensor signal line obtains the first dew point temperature, and the central controller completes the adjustment of the first dew point temperature by automatically controlling the number of working units of the parallel compound compression refrigeration subsystem and the operating frequency of the compressor; The system obtains the second dew point temperature through the second dew point temperature sensor and the signal line of the second dew point temperature sensor arranged in the temperature and humidity adjustment section. Automatic control completes the adjustment of the second dew point temperature; the central control subsystem obtains the return air temperature of each refrigeration cycle compressor from the return air temperature sensor of the refrigeration, dehumidification and refrigeration cycle, and obtains the return air temperature and working temperature of the refrigeration, dehumidification and refrigeration cycle compressors Time is used to judge the frosting and icing conditions of each evaporator for freezing, dehumidification and refrigeration cycle. When one of the evaporators for freezing, dehumidification and refrigeration cycle needs to defrost and defrost, first start a freezing, dehumidification and refrigeration cycle in standby working state , then close the evaporator for the freezing, dehumidification and refrigeration cycle that needs defrosting and defrosting, and then adjust the air valve, then open the defrosting electromagnetic valve of the refrigeration, dehumidification and refrigeration cycle, and at the same time close the exhaust bus of the refrigeration, dehumidification and refrigeration cycle of the refrigeration, dehumidification and refrigeration cycle Tube electromagnetic valve, so that the exhaust gas of the refrigeration cycle compressor enters the evaporator of the refrigeration cycle for defrosting and deicing. When the air temperature rises to 4°C, the defrosting and icing ends, and the central control subsystem shuts down the compressor of the refrigerating, dehumidifying and refrigerating cycle, so that the evaporator of the refrigerating, dehumidifying and refrigerating cycle that has completed defrosting and thawing has a wall drying process of more than ten minutes. , and then the freezing, dehumidifying and refrigerating cycle enters the standby working state; the central controller scientifically arranges the defrosting and deicing processes of different freezing, dehumidifying and refrigerating cycles according to the principle that only one freezing, dehumidifying and refrigerating cycle can carry out the defrosting process at the same time; The control subsystem obtains the air supply volume from the air flow sensor arranged in the temperature and humidity adjustment section, and the central controller ensures that the air supply volume index is not affected by the frosting process by adjusting the working frequency of the fan.

The present invention can not only form a high-efficiency energy-saving, deep dehumidification temperature-adjusting and humidity-regulating air conditioning system, but also form a high-efficiency energy-saving, deep dehumidification convective dry air power source system, both of which are only controlled temperature and humidity (including supply air temperature and humidity, The range of temperature and humidity after each functional section is different, and the number and capacity of the various subsystems used are different.

The condenser group for the two-phase flow cooling capacity recovery and utilization subsystem in the present invention can also be installed before the condenser group of the multi-stage compound refrigeration dehumidification refrigeration cycle subsystem, so that the two-phase flow cooling capacity recovery utilization subsystem can The working temperature difference increases, and the working energy efficiency increases; but at this time, the working energy efficiency of the refrigeration, dehumidification and refrigeration cycle subsystem will decrease due to the increase of the working temperature range.

Compared with the prior art, the present invention has the following advantages: First, the energy consumption of the freezing depth dehumidification air treatment device and method is only 25%-40% of the existing dehumidification method of the cage, and the dew point temperature of the machine is the lowest and can last for a long time Stable control at -25°C greatly saves energy and reduces the operating cost of the low-humidity air treatment process; second, the machine dew point temperature of the treated air is reduced from above 14°C to a minimum of -25°C, realizing deep dehumidification; The third is to use the heat pump energy-saving technology, which not only realizes the high-efficiency freezing and dehumidification process, but also realizes the high-efficiency heating process, which saves energy consumption in the heating process; the fourth is to adopt the internal and external composite two-phase flow heat pipe cooling capacity recycling subsystem, which effectively recycles and utilizes The cold energy in the air that reaches the dew point of the machine greatly reduces energy consumption; fifthly, through the organic combination of the internal and external composite heat pump circulation subsystem without heat dissipation and the internal and external composite heat pump circulation subsystem with heat dissipation, the condenser can be effectively used The heat discharged from the air is used to heat the low-temperature and low-humidity air, which not only saves the energy consumption of the heating process, but also improves the cooling efficiency; the sixth is to realize a deeper dehumidification process through the specially arranged multi-stage composite refrigeration dehumidification refrigeration cycle subsystem , so that the dew point temperature of the machine is reduced from the original 4°C to the minimum of -25°C, which can meet the requirements of more production processes; it has simple structure, convenient operation, low cost, low energy consumption, high energy utilization rate, and high refrigeration and dehumidification efficiency , Environmentally friendly.

Description of drawings:

Fig. 1 is a schematic diagram of the main structure of the energy-saving refrigerated deep dehumidification air treatment device of the present invention.

detailed description:

Further description will be given below through the embodiments and in conjunction with the accompanying drawings.

Example:

The main structure of the energy-saving refrigerated deep dehumidification air treatment device described in this embodiment includes internal and external composite gas-liquid two-phase flow heat pipe cooling capacity recovery, pre-refrigeration heat exchanger, internal and external composite heat pump cycle, multi-stage composite refrigeration dehumidification refrigeration Circulation and central control five subsystems, internal and external composite gas-liquid two-phase flow heat pipe cooling capacity recovery subsystem includes heat pipe cooling capacity recovery evaporator group 16, heat pipe cooling capacity recovery condenser group 24, heat pipe cooling capacity recovery evaporator The two ends of the group 16 are connected with the temperature and humidity regulation section 15 and the heat exchanger group 17 for pre-cooling respectively, and the front end of the temperature and humidity regulation section 15 is connected with the air pretreatment section 14; the heat exchanger subsystem for pre-cooling includes pre-cooling Cooling heat exchanger group 17, pre-cooling heat exchanger internal and external connecting pipe 32 and pre-cooling heat exchanger outdoor unit 33; the upper end of pre-cooling heat exchanger group 17 passes through the pre-cooling heat exchanger internal and external connecting pipe 32 is connected with the outdoor unit 33 of the heat exchanger for pre-cooling; the internal and external composite heat pump cycle subsystem includes the evaporator group 18 for the heat pump cycle and the condenser group 25 for the heat pump cycle; the front end of the evaporator group 18 for the heat pump cycle is connected to the pre- The cooling heat exchanger group 17 is connected, the rear end is provided with a front water baffle 19, and the rear end of the front water baffle is provided with a first dew point temperature sensor 28, and the first dew point temperature sensor 28 communicates with the first dew point temperature sensor signal line 36. The central controller 44 is connected to the electrical information; the multi-stage composite refrigeration, dehumidification and refrigeration cycle subsystem is composed of 2-10 refrigeration, dehumidification and refrigeration cycles arranged in series and parallel composite structures, and the structure and size of the 2-10 refrigeration, dehumidification and refrigeration cycles It is exactly the same, according to the air flow direction, 2-10 refrigerating and dehumidifying refrigerating cycle evaporators 20 are arranged in parallel, and 2-10 refrigerating and dehumidifying refrigerating cycle condensers 23 are arranged in series, and each refrigerating, dehumidifying and refrigerating cycle includes refrigerating and dehumidifying Refrigeration cycle evaporator liquid supply pipe 1, refrigeration dehumidification refrigeration cycle defrost solenoid valve 2, refrigeration dehumidification refrigeration cycle throttle valve 3, refrigeration dehumidification refrigeration cycle defrost steam pipe 4, refrigeration dehumidification refrigeration cycle drying filter 5, refrigeration dehumidification refrigeration Circulating liquid storage tank 6, liquid return pipe 7, refrigerating and dehumidifying refrigerating cycle return air temperature sensor 8, refrigerating and dehumidifying refrigerating cycle evaporator water tray 9, refrigerating and dehumidifying refrigerating cycle return air pipe 10, refrigerating and dehumidifying refrigerating cycle compressor 11, refrigerating and dehumidifying Refrigeration cycle exhaust main pipe electromagnetic valve 12, refrigeration dehumidification refrigeration cycle exhaust main pipe 13, refrigeration dehumidification refrigeration cycle evaporator 20 and refrigeration dehumidification refrigeration cycle condenser 23, the rear side of refrigeration dehumidification refrigeration cycle evaporator 20 is provided The air valve 21 is adjusted behind the condenser of the freezing, dehumidifying and refrigerating cycle, the lower end of the evaporator 20 for the refrigerating, dehumidifying and refrigerating cycle is provided with a water receiving tray 9 for the evaporator of the refrigerating, dehumidifying and refrigerating cycle, and the evaporator 20 for the refrigerating, dehumidifying and refrigerating cycle passes through Evaporator liquid supply pipe 1, freezing, dehumidification and refrigeration cycle defrost steam pipe 4, liquid return pipe 7, refrigeration, dehumidification and refrigeration cycle return pipe 10, refrigeration, dehumidification and refrigeration cycle exhaust main pipe 13, and condenser 23 for freezing, dehumidification and refrigeration cycle. , the refrigerating and dehumidifying refrigerating cycle compressor 11 passes through the refrigerating and dehumidifying refrigerating cycle The loop-back air pipe 10 draws low-pressure steam from the evaporator 20 for the refrigeration, dehumidification and refrigeration cycle, and the exhaust gas from the compressor 11 of the refrigeration, dehumidification and refrigeration cycle is sent to the defrosting steam pipe 4 and the exhaust main pipe 13 of the refrigeration, dehumidification and refrigeration cycle. The liquid supply pipe 1 and the liquid return pipe 7 of the refrigerating and dehumidifying refrigerating cycle evaporator are connected in series, and the refrigerating, dehumidifying and refrigerating cycle evaporator is provided with a throttle valve 3 for the refrigerating, dehumidifying and refrigerating cycle from front to back between the liquid supply pipe 1 and the liquid returning pipe 7 , freeze dehumidification refrigeration cycle drying filter 5 and refrigeration dehumidification refrigeration cycle liquid storage tank 6, freeze dehumidification refrigeration cycle defrost steam pipe 4 is provided with refrigeration dehumidification refrigeration cycle defrost solenoid valve 2, freeze dehumidification refrigeration cycle return air pipe 10 and freezer The pipeline between the dehumidification and refrigeration cycle exhaust main pipes 13 is successively provided with a refrigeration dehumidification refrigeration cycle return air temperature sensor 8, a refrigeration dehumidification refrigeration cycle compressor 11 and a refrigeration dehumidification refrigeration cycle exhaust main pipe solenoid valve 12; The front end of the condenser 23 for the dehumidification and refrigeration cycle is provided with a rear fender 22, and a second dew point temperature sensor 29 is arranged between the rear fender 22 and the first condenser 23 for the refrigeration, dehumidification and refrigeration cycle; The rear side of the condenser 23 for circulation is provided with a condenser group 24 for heat pipe cooling recovery, a condenser group 25 for heat pump circulation, a blower fan 26 and an air post-processing section 27 in sequence, and the air post-processing section 27 is provided with an air outlet temperature and humidity Sensor 30 and wind speed and air volume sensor 31 at the air outlet; the central control subsystem includes a central controller 44, a control line 34 for the defrosting solenoid valve of the refrigeration, dehumidification and refrigeration cycle, a signal line 35 for the return air temperature sensor of the refrigeration, dehumidification and refrigeration cycle, and a signal from the first dew point temperature sensor. Line 36, refrigerating, dehumidifying and refrigerating cycle evaporator rear regulating air valve control line 37, refrigerating, dehumidifying and refrigerating cycle compressor control line 38, refrigerating, dehumidifying and refrigerating cycle exhaust master solenoid valve control line 39, second dew point temperature sensor signal line 40, Fan air volume adjustment control line 41, air outlet temperature and humidity sensor signal line 42 and air outlet air volume sensor signal line 43, freezing and dehumidification refrigeration cycle defrost solenoid valve 2, refrigeration dehumidification refrigeration cycle return air temperature sensor 8, first dew point temperature sensor 28. Regulating air valve 21 after evaporator of refrigeration, dehumidification and refrigeration cycle, compressor of refrigeration, dehumidification and refrigeration cycle 11, solenoid valve of exhaust main pipe of refrigeration, dehumidification and refrigeration cycle 12, second dew point temperature sensor 29, fan 26, air outlet temperature and humidity sensor 30 and the wind speed and air volume sensor 31 at the air outlet respectively through the control line 34 of the defrosting solenoid valve of the freezing and dehumidification refrigeration cycle, the signal line 35 of the return air temperature sensor of the refrigeration and dehumidification refrigeration cycle, the signal line 36 of the first dew point temperature sensor, and the post-adjustment of the evaporator of the refrigeration, dehumidification and refrigeration cycle. Air valve control line 37, refrigeration dehumidification refrigeration cycle compressor control line 38, refrigeration dehumidification refrigeration cycle exhaust main solenoid valve control line 39, second dew point temperature sensor signal line 40, fan air volume adjustment control line 41, air outlet temperature and humidity The sensor signal line 42 and the air outlet wind speed and air volume sensor signal line 43 are electrically connected to the central controller 44 .

The specific process of this embodiment to realize the energy-saving deep-frozen dehumidification air treatment is: under the action of the fan 26, the air to be treated flows out from the air pretreatment section 14 and enters the temperature and humidity adjustment section 15, and in the temperature and humidity adjustment section In 15, the treated air is first cooled and lowered by the evaporator group 16 for heat pipe cooling recovery in the internal and external composite two-phase flow heat pipe cooling capacity recovery subsystem, and then by the pre-cooling unit of the pre-cooling heat exchanger subsystem. Use the heat exchanger group 17 for further cooling, and then be further cooled by the heat pump cycle evaporator group 18 of the internal and external composite heat pump cycle subsystem. At this time, the air temperature is not lower than 4°C, reaching the first dew point temperature; The air at high temperature passes through the front water baffle 19 to remove liquid water droplets, and then goes through 2-10 refrigerating, dehumidifying and refrigerating cycles of the multi-stage composite refrigerating, dehumidifying and refrigerating cycle subsystem for deep cooling with the evaporator 20, and the treated air finally reaches the first 2 Dew point temperature, the lowest can reach -25°C, and then the air passes through the rear fender 22 to remove the liquid water droplets entrained in the air, and then flows through 2-10 refrigeration, dehumidification and refrigeration cycles of the multi-stage composite refrigeration, dehumidification and refrigeration cycle subsystem The condenser 23 is used for heating. After the air temperature is heated from the second dew point temperature to 4-12°C, the air enters the two-phase flow cooling capacity recycling condenser group 24 and is further heated to 12-20°C, and finally enters the heat pump circulation subsystem The heat pump cycle is further heated by the condenser group 25. After the air reaches the set air supply temperature, it enters the air post-treatment section 27 to complete the air temperature and humidity adjustment process; wherein, the central control subsystem adjusts the pre-cooling heat exchange The refrigeration capacity of the heat pump subsystem and the heat pump circulation subsystem controls the first dew point temperature to achieve the goal of cooling and preliminary dehumidification; the central control subsystem controls the second dew point temperature by adjusting the refrigeration capacity of the multi-stage composite refrigeration dehumidification refrigeration circulation subsystem, Achieve the goal of deep dehumidification and accurate control of relative humidity; and then control the outlet air temperature by adjusting the amount of heat exhausted in the heat pump circulation subsystem and the number of working units of the heat pump circulation subsystem without heat dissipation, so as to achieve the goal of temperature adjustment.

The internal and external composite two-phase flow heat pipe cooling capacity recycling subsystem described in this embodiment is the same as the energy-saving air treatment method for temperature and humidity regulation disclosed in the invention patent ZL201210290885.4.

The heat exchanger subsystem for pre-refrigeration described in this embodiment is the same parallel compound compression refrigeration subsystem as that disclosed in the invention patent ZL201210290885. The heat exchanger subsystem composed of the surface cooler, the pre-cooling heat exchanger can efficiently discharge the excess heat in the air conditioning circulation system under the hottest working conditions in summer.

The heat pump circulation subsystem described in this embodiment is similar to the heat pump circulation subsystem in an energy-saving temperature and humidity regulation air treatment method disclosed in the invention patent ZL201210290885. There are two types of heat pump cycle with heat removal. The cooling capacity of the evaporator of the heat pump cycle subsystem is used to further cool the pre-cooled air to reach the first dew point temperature to achieve efficient cooling and dehumidification. The heat removal of the condenser is partly It is used to heat the low-temperature and low-humidity air after reaching the second dew point temperature, so that the temperature of the air outlet in the temperature and humidity control section reaches the set requirements, and the other part of the excess heat is discharged to the external environment through the outdoor condenser to realize temperature and humidity control Segment energy balance control.

The working principle of the multi-stage composite freezing, dehumidification and refrigeration cycle subsystem described in this embodiment is: the evaporator in the refrigeration, dehumidification and refrigeration cycle further realizes deep cooling and dehumidification of the air reaching the dew point temperature of the first machine, so that the processed air finally reaches a very high temperature. Low second machine dew point temperature (the lowest can reach -25°C), and the heat exhausted by the condenser 23 used in the freezing and dehumidification refrigeration cycle is used to heat the low-temperature and low-humidity air after reaching the second dew point temperature, so as to realize the exchange of cold and heat energy At the same time, it is used efficiently; the purpose of adopting multi-stage compounding is to ensure that when the defrosting and deicing treatment is performed in one of the first-stage refrigeration and dehumidification refrigeration cycles, the remaining refrigeration, dehumidification and refrigeration cycles can still meet the requirements of deep cooling and dehumidification.

The working principle of the central control subsystem described in this embodiment is as follows: the air supply temperature is obtained by the air outlet temperature and humidity sensor 30 arranged in the temperature and humidity adjustment section 15, and the central controller 44 controls the temperature of the outdoor condenser in the heat pump circulation subsystem. The speed control of the fan (see patent ZL201210290885.4 for details) is used to change the heat discharged to the outside to realize the adjustment of the outlet air temperature of the temperature and humidity adjustment section 16. If the fan speed of the outdoor condenser is adjusted to the limit, it still cannot meet the adjustment requirements of the air supply temperature , then further automatically adjust the operating frequency of the compressor in the heat pump cycle subsystem with heat removal to complete the adjustment of the air supply temperature. The specific process is disclosed in ZL201210290885.4; 1 Dew point temperature sensor 28 and the first dew point temperature sensor signal line 36 obtain the first dew point temperature, and the central controller 44 automatically controls the number of working units of the parallel compound compression refrigeration subsystem and the operating frequency of the compressor to complete the first dew point temperature. 1. Adjustment of dew point temperature; the central control subsystem obtains the second dew point temperature through the second dew point temperature sensor 29 and the second dew point temperature sensor signal line 40 arranged in the temperature and humidity adjustment section 15, and the central controller 44 controls the multi-level The operating frequency of the compound refrigeration dehumidification refrigeration cycle compressor 11 is automatically controlled to complete the adjustment of the second dew point temperature; the central control subsystem obtains the return air temperature sensor 8 of each refrigeration dehumidification refrigeration cycle compressor 11. Air temperature, the frosting and freezing conditions of each evaporator 20 for freezing, dehumidification and refrigeration cycle are judged by indicators such as the return air temperature and working time of the compressor 11 of the refrigeration, dehumidification and refrigeration cycle. 20. When it is necessary to defrost and defrost, first start a freezing, dehumidifying and refrigerating cycle in the standby working state, then close the evaporator for the freezing, dehumidifying and refrigerating cycle that needs to be defrosted and defrosted, and then adjust the air valve 21, and then open the refrigerating, dehumidifying and refrigerating cycle. Cycle defrost solenoid valve 2, and close the refrigeration, dehumidification and refrigeration cycle exhaust main pipe solenoid valve 12 of the refrigeration, dehumidification and refrigeration cycle at the same time, so that the exhaust gas of the refrigeration, dehumidification and refrigeration cycle compressor 11 enters the evaporator 20 for freezing, dehumidification and refrigeration cycle for defrosting Deicing, in the process of defrosting and deicing, the return air temperature of the refrigeration cycle compressor 11 for freezing and dehumidification is gradually increased. The refrigerating cycle compressor 11 allows the evaporator 20 of the refrigerating, dehumidifying and refrigerating cycle having completed defrosting and deicing to have a wall surface drying process of more than ten minutes, and then the refrigerating, dehumidifying and refrigerating cycle enters a standby working state; The principle that there can only be one freezing, dehumidifying and refrigerating cycle for the defrosting process scientifically arranges the defrosting and deicing processes of different refrigerating, dehumidifying and refrigerating cycles; Air volume, the central controller 44 ensures that the air supply volume index is not affected by the frosting process by adjusting the operating frequency of the fan 26 .

Claims (1)

1. a kind of energy-saving freezing depth dehumidified air processing method, it is characterised in that at energy-saving freezing depth dehumidified air Realized in reason device, its detailed process is：In the presence of blower fan, pending air flows out from air pretreatment section goes forward side by side Enter conditioning section, in conditioning section, processed air is first recycled by inside and outside combined type two phase flow heat pipe cold Heat pipe cold recovery in subsystem is cooled with evaporator group, is then prefabricated the pre- refrigeration of colod-application heat exchanger subsystem again Further cooled down with heat exchanger group, it is then further with evaporator group by the heat pump cycle of inside and outside combined heat pump cycle subsystem Cooling, now, air themperature are not less than 4 DEG C, reach the 1st dew-point temperature；The premenstrual water fender of air for reaching the 1st dew-point temperature is gone Used after liquid water droplets, then by 2-10 freeze drying kind of refrigeration cycle of multistage combined freeze drying kind of refrigeration cycle subsystem Evaporator carries out depth cooling, and processed air is finally reached the 2nd dew-point temperature, and minimum to reach -25 DEG C, then, air is after The 2- of multistage combined freeze drying kind of refrigeration cycle subsystem is flowed through after the liquid water droplets carried secretly in water fender removal air successively 10 freeze drying kind of refrigeration cycle are heated with condenser, and air themperature is after the 2nd dew-point temperature is heated to 4-12 DEG C, air 12-20 DEG C is further heated to using condenser group into two phase flow cold recovery, finally enters heat pump cycle subsystem Heat pump cycle is further heated with condenser group, and air reaches air inlet post processing section after the ventilation temperature of setting, completes empty The conditioning processing procedure of gas；Wherein, central control subsystem is followed by adjusting pre- heat exchanger for refrigerating subsystem with heat pump The refrigerating capacity of loop subsystems controls the 1st dew-point temperature, reaches cooling and the target tentatively to dehumidify；Central control subsystem passes through Adjust multistage combined freeze drying kind of refrigeration cycle subsystem refrigerating capacity control the 2nd dew-point temperature, reach depth dehumidifying and The target of accurate control relative humidity；Again by the size of external heat exhaust in adjusting heat pump cycle subsystem and without heat extraction heat pump Air temperature is made in the workbench numerical control of cycle subsystem, reaches the target of temperature adjustment；At the energy-saving freezing depth dehumidified air Managing the agent structure of device includes inside and outside combined type biphase gas and liquid flow heat pipe cold recovery, pre- heat exchanger for refrigerating, inside and outside compound Five formula heat pump cycle, multistage combined freeze drying kind of refrigeration cycle and center control subsystems, inside and outside combined type gas-liquid two-phase Stream heat pipe cold recovery subsystem includes heat pipe cold recovery evaporator group and heat pipe cold recovery condenser group, heat pipe cold Amount recovery is connected with conditioning section and pre- heat exchanger for refrigerating group respectively with the both ends of evaporator group, the front end of conditioning section Connected with air pretreatment section；Pre- heat exchanger for refrigerating subsystem is including in pre- heat exchanger for refrigerating group, pre- heat exchanger for refrigerating The outdoor unit of outer connecting pipe and pre- heat exchanger for refrigerating；The upper end of pre- heat exchanger for refrigerating group passes through in pre- heat exchanger for refrigerating Outer connecting pipe connects with the outdoor unit of pre- heat exchanger for refrigerating；Inside and outside combined heat pump cycle subsystem is used including heat pump cycle Evaporator group and heat pump cycle condenser group；Heat pump cycle is connected with the front end of evaporator group with pre- heat exchanger for refrigerating group, Rear end is provided with preceding water fender, and preceding water fender rear end is provided with the 1st dew point temperature sensor, and the 1st dew point temperature sensor passes through the 1st dew Point temperature sensor signal line is connected with central controller power information；Multistage combined freeze drying kind of refrigeration cycle subsystem is by 2- 10 freeze drying kind of refrigeration cycle arrange composition, 2-10 freeze drying kind of refrigeration cycle according to the compound structure type of series and parallel Structure it is identical with size, by air current flow direction, 2-10 freeze drying kind of refrigeration cycle evaporator uses parallel way Arrangement, 2-10 freeze drying kind of refrigeration cycle condenser use arranged in series, and each freeze drying kind of refrigeration cycle includes Freeze drying kind of refrigeration cycle evaporator feed pipe, freeze drying kind of refrigeration cycle defrost magnetic valve, the throttling of freeze drying kind of refrigeration cycle Valve, freeze drying kind of refrigeration cycle defrost steam pipe, freeze drying kind of refrigeration cycle device for drying and filtering, freeze drying kind of refrigeration cycle liquid storage Tank, liquid back pipe, freeze drying kind of refrigeration cycle suction temperature sensor, freeze drying kind of refrigeration cycle evaporator drip tray, freezing Desiccant cooling circulation muffler, freeze drying kind of refrigeration cycle compressor, freeze drying kind of refrigeration cycle exhaust main pipe magnetic valve, freezing Desiccant cooling circulating exhaust main pipe, freeze drying kind of refrigeration cycle evaporator and freeze drying kind of refrigeration cycle condenser, freezing The rear side of desiccant cooling circulation evaporator is provided with regulating valve after freeze drying kind of refrigeration cycle condenser, freeze drying kind of refrigeration cycle Freeze drying kind of refrigeration cycle evaporator drip tray is provided with the lower end of evaporator, freeze drying kind of refrigeration cycle is distinguished with evaporator Pass through freeze drying kind of refrigeration cycle evaporator feed pipe, freeze drying kind of refrigeration cycle defrost steam pipe, liquid back pipe, freeze drying system SAPMAC method muffler and freeze drying kind of refrigeration cycle exhaust main pipe and freeze drying kind of refrigeration cycle condenser tubes UNICOM, freezing Desiccant cooling recycle compressor is sucked by freeze drying kind of refrigeration cycle muffler from freeze drying kind of refrigeration cycle with evaporator Freeze drying kind of refrigeration cycle defrost steam pipe and freeze drying are sent into low-pressure steam, the exhaust of freeze drying kind of refrigeration cycle compressor Kind of refrigeration cycle exhaust main pipe, freeze drying kind of refrigeration cycle evaporator feed pipe and liquid back pipe concatenation UNICOM, freeze drying refrigeration are followed Freeze drying kind of refrigeration cycle choke valve, freeze drying refrigeration are sequentially provided between ring evaporator feed pipe and liquid back pipe from front to back Cyclic drying filter and freeze drying kind of refrigeration cycle fluid reservoir, freeze drying kind of refrigeration cycle defrost steam pipe remove provided with freezing Wet kind of refrigeration cycle defrost magnetic valve, the pipe between freeze drying kind of refrigeration cycle muffler and freeze drying kind of refrigeration cycle exhaust main pipe Freeze drying kind of refrigeration cycle suction temperature sensor, freeze drying kind of refrigeration cycle compressor and freeze drying system are sequentially provided with road SAPMAC method exhaust main pipe magnetic valve；The front end of first freeze drying kind of refrigeration cycle condenser is provided with rear water plate, rear water The 2nd dew point temperature sensor is provided between plate and first freeze drying kind of refrigeration cycle condenser；Last freeze drying Kind of refrigeration cycle is with being sequentially provided with heat pipe cold recovery condenser group, heat pump cycle condenser group, blower fan on rear side of condenser Section is post-processed with air, air outlet Temperature Humidity Sensor and air outlet wind speed air flow sensor are provided with air post processing section； Central control subsystem includes central controller, freeze drying kind of refrigeration cycle defrost control line of electromagnetic valve, freeze drying refrigeration and followed Wind is adjusted after ring suction temperature sensor signal lines, the 1st dew point temperature sensor signal wire, freeze drying kind of refrigeration cycle evaporator Valve control line, freeze drying kind of refrigeration cycle compressor control line, freeze drying kind of refrigeration cycle exhaust main pipe control line of electromagnetic valve, 2 dew point temperature sensor signal wires, fan delivery adjustment control line, air outlet Temperature Humidity Sensor signal wire and air outlet wind speed Air flow sensor signal wire, freeze desiccant cooling circulation defrost magnetic valve, freeze drying kind of refrigeration cycle suction temperature sensor, the 1st Adjusting air valve, freeze drying kind of refrigeration cycle compressor, freezing remove after dew point temperature sensor, freeze drying kind of refrigeration cycle evaporator Wet kind of refrigeration cycle exhaust main pipe magnetic valve, the 2nd dew point temperature sensor, blower fan, air outlet Temperature Humidity Sensor and air-out one's intention as revealed in what one says Fast air flow sensor passes through freeze drying kind of refrigeration cycle defrost control line of electromagnetic valve, freeze drying kind of refrigeration cycle suction temperature respectively Adjusting air valve control line after sensor signal lines, the 1st dew point temperature sensor signal wire, freeze drying kind of refrigeration cycle evaporator, Freeze drying kind of refrigeration cycle compressor control line, freeze drying kind of refrigeration cycle exhaust main pipe control line of electromagnetic valve, the 2nd dew-point temperature Sensor signal lines, fan delivery adjustment control line, air outlet Temperature Humidity Sensor signal wire and air outlet wind speed air quantity sensing Device signal wire is connected with central controller power information.