CN112815602A - Drying system and method following cold end cooling system - Google Patents

Drying system and method following cold end cooling system Download PDF

Info

Publication number
CN112815602A
CN112815602A CN202110084375.0A CN202110084375A CN112815602A CN 112815602 A CN112815602 A CN 112815602A CN 202110084375 A CN202110084375 A CN 202110084375A CN 112815602 A CN112815602 A CN 112815602A
Authority
CN
China
Prior art keywords
gas
cold end
condenser
drying
control assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110084375.0A
Other languages
Chinese (zh)
Other versions
CN112815602B (en
Inventor
吕绮雯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinounion Healthcare Inc
Original Assignee
Sinounion Healthcare Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sinounion Healthcare Inc filed Critical Sinounion Healthcare Inc
Priority to CN202110084375.0A priority Critical patent/CN112815602B/en
Publication of CN112815602A publication Critical patent/CN112815602A/en
Application granted granted Critical
Publication of CN112815602B publication Critical patent/CN112815602B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification

Abstract

The invention provides a drying system following a cold end cooling system, which comprises a compressor, a condenser, a gas flow control assembly and a cavity for accommodating a cold end, wherein the compressor is connected with the condenser; the cooling working medium inlet of the condenser is used for introducing a liquid cooling working medium which is provided by a refrigerator in the cold end cooling system and absorbs the heat of the cold end; the cooling working medium outlet of the condenser is communicated with the cooling working medium inlet of the refrigerator in the cold end cooling system; the air inlet of the compressor is used for introducing air, the air outlet of the compressor is communicated with the air inlet of the condenser, and the air outlet of the condenser is communicated with the cavity through the air flow control assembly. The drying degree of the dry gas can be synchronously changed along with the dew point requirement of the cold end, the dry gas with the dew point below 0 ℃ can be provided, the energy consumption is low, and the equipment reliability is high. The invention also provides a drying method following the cold end cooling system.

Description

Drying system and method following cold end cooling system
Technical Field
The invention relates to the technical field of freeze drying, in particular to a drying system and a drying method which follow a cold end cooling system.
Background
The large-scale equipment adopts the water-cooling machine refrigeration to produce the cold source, and local cold junction requires to keep low temperature operation, for preventing that the cold junction from producing the comdenstion water, the comdenstion water drippage leads to the electrical equipment short circuit of cold junction, damages, need be equipped with drying device so that the gas around the cold junction is in dry state, and dry accessible under the normal atmospheric temperature seals completely to be added the desiccator or leads to methods such as dry gas and keeps local drying.
However, when the cold end temperature is required to be as low as zero or lower for operation, the ordinary dryer or drying agent is generally difficult to reduce the dew point of the gas around the cold end to below 0 ℃, so that the cold end cannot be prevented from generating condensed water. The requirement of local drying on the amount of the drying gas is low, while the large-scale equipment generally runs continuously for 24 hours in full time, the requirement on the reliability of the drying equipment is high, and the energy-saving requirement is high.
In principle, the rotary dehumidifier and the freeze-drying dehumidifier can provide drying gas with the dew point below 40 ℃ below zero, and can meet the deep drying requirement. However, the rotary dehumidifier principle determines that the water in the rotary wheel is taken away by the regenerative air to be heated, and the temperature difference between the dry air and the cold end is required to be as low as possible when the cold end is maintained in a stable temperature state, so that the interference to the cold end is reduced, the dry air needs to be cooled and then conveyed, the whole process is firstly heated and then cooled, and the energy consumption is increased; the traditional independent freeze dryer is large in size and power, the miniature freeze dryer is poor in reliability, and when the dew point requirement is low, the power is low, and the drying efficiency is poor.
Therefore, a drying system with low energy consumption and high reliability, which can provide dry gas with dew point below 0 ℃, is needed.
Disclosure of Invention
Technical problem to be solved
In view of the problems in the art described above, the present invention is at least partially addressed. Therefore, one object of the present invention is to provide a drying system following a cold end cooling system, which can synchronously change the drying degree of the drying gas according to the cold end dew point requirement, can provide the drying gas with the dew point below 0 ℃, and has low energy consumption and high equipment reliability.
A second object of the invention is to propose a drying method followed by a cold-end cooling system.
(II) technical scheme
In order to achieve the above object, the present invention provides a drying system following a cooling system at a cold end, comprising a compressor, a condenser, a gas flow control assembly and a cavity for accommodating the cold end;
the cooling working medium inlet of the condenser is used for introducing a liquid cooling working medium which is provided by a refrigerator in the cold end cooling system and absorbs the heat of the cold end; the cooling working medium outlet of the condenser is communicated with the cooling working medium inlet of the refrigerator in the cold end cooling system;
the air inlet of the compressor is used for introducing air, the air outlet of the compressor is communicated with the air inlet of the condenser, and the air outlet of the condenser is communicated with the cavity through the air flow control assembly.
Further, the drying system also comprises a gas storage tank, wherein a gas inlet of the gas storage tank is communicated with a gas outlet of the compressor, and a gas outlet of the gas storage tank is communicated with a gas inlet of the condenser in an isobaric manner.
Furthermore, the drying system also comprises a first electromagnetic valve, a condensed water outlet of the compressor is used for draining water through the first electromagnetic valve, and a condensed water outlet of the condenser is used for draining water through the first electromagnetic valve.
Further, the gas flow control assembly is a fixed dual-flow-rate control assembly; or the gas flow control assembly is a multi-gear flow rate control assembly; alternatively, the gas flow control assembly is a stepless flow rate control assembly.
Further, the fixed double-flow-rate control assembly comprises a tee pipe fitting and a second electromagnetic valve; and a gas inlet of the three-way pipe is communicated with a gas outlet of the condenser, a first gas outlet of the three-way pipe is communicated with the cavity, and a second gas outlet of the three-way pipe is communicated with the cavity through a second electromagnetic valve.
Further, the drying system also comprises a third electromagnetic valve, the cavity is a sealed cavity, and the sealed cavity is exhausted through the third electromagnetic valve.
Furthermore, the drying system also comprises a temperature and humidity probe, and the temperature and humidity probe is used for measuring the temperature change of the cold end and the dew point change of gas in the cavity.
In addition, the invention also provides a drying method following the cold end cooling system, which uses the system as described above and comprises the following steps:
s1, the gas flow control assembly controls the flow rate of the drying gas to be output at a first preset value, and the compressor supplies high-temperature and high-pressure gas into the condenser to enable the gas pressure in the condenser to be stabilized within a preset pressure range;
s2, the cold end cooling system performs stepped cooling on the cold end to an expected temperature, and each time the cold end cooling system performs cooling on the cold end, the cooling is finished when the dew point of the dry gas is lower than the outlet temperature of the refrigerating machine cooling working medium in the cold end cooling system;
s3, the gas flow control assembly controls the flow rate of the drying gas to be output at a second preset value, and the second preset value is smaller than the first preset value.
Further, the gas flow control assembly controls the flow rate of the drying gas to be output at a first preset value, and comprises: opening a second electromagnetic valve; the gas flow control assembly controls the flow rate of the drying gas to be output at a second preset value, and comprises: the second solenoid valve is closed.
Further, the drying method following the cold end cooling system provided by the invention further comprises the following steps:
s4, in the operation process of the drying system, if the temperature and humidity probe monitors that the dew point of the drying gas rises and the temperature of the cold end also rises, the cold source of the refrigerator breaks down; if the temperature and humidity probe monitors that the dew point of the dry gas slowly rises and the temperature of the cold end floats up and down, the compressor fails.
(III) advantageous effects
The invention has the beneficial effects that:
1. the follow-up of the drying system and the cold end cooling system provided by the invention can synchronously change the drying degree of the drying gas along with the change of the required temperature of the cold end cooling system, namely synchronously change the drying degree of the drying gas along with the requirement of the cold end dew point.
2. The drying system provided by the invention can be used for deep drying, so that the dew point of the drying gas can reach below-40 ℃.
3. In the drying system following the cold end cooling system provided by the embodiment of the invention, the following design of the drying system and the cold end cooling system is the following on the physical hardware structure design, the following reliability is high, and the following is not kept by temperature and humidity detection electronic component detection equipment.
4. Drying system and cold junction cooling system adopt same cold source control, and the power consumption is low and reduce equipment failure rate, and when the cold source accident became invalid, cold junction cooling system and drying system became invalid simultaneously, and the cold junction temperature rose, and the dry gas dew point that drying system provided rose simultaneously, did not influence equipment safety, reduced because the cold junction electronic components damage probability that the comdenstion water caused.
Drawings
The invention is described with the aid of the following figures:
FIG. 1 is a schematic diagram of a drying system followed by a cold end cooling system according to an embodiment of the present invention;
FIG. 2 is a graph of the temperature equalization of a high pressure gas versus the dew point of a drying gas in accordance with an embodiment of the present invention;
FIG. 3 is a graph of the outlet temperature of the cooling medium of the refrigerator and the dew point of the drying gas according to the embodiment of the invention.
[ description of reference ]
1: a compressor;
11: a gas storage tank;
12: a first solenoid valve;
2: a condenser;
3: fixing the dual flow rate control assembly;
31: a tee pipe fitting; 32: a second solenoid valve;
4: a cavity;
41: a third electromagnetic valve;
42: a temperature and humidity probe;
5: a controller;
6: a water cooling machine.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
According to the drying system and the drying method which follow up with the cold end cooling system, provided by the embodiment of the invention, air is pressurized, and the temperature of high-pressure gas is controlled by using the liquid cooling working medium which absorbs the heat of the cold end in the cold end cooling system, so that a large amount of condensed water is separated out from the high-pressure gas, and the dry gas with normal pressure and low dew point is output, so that the energy consumption is low; and the drying degree of the drying system keeps follow-up through a same cold source mode and a cold end cooling system, and the reliability is high.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below. It should be understood, however, that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
A drying system following a cold end cooling system according to an embodiment of the present invention will now be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a drying system followed by a cold end cooling system in accordance with one embodiment of the present invention.
As shown in fig. 1, the drying system, which follows the cold side cooling system, comprises a compressor 1, a condenser 2, a gas flow control assembly and a chamber 4 housing the cold side. And a cooling working medium inlet of the condenser 2 is used for introducing a liquid cooling working medium which is provided by the refrigerator in the cold-end cooling system and absorbs the heat of the cold end, and a cooling working medium outlet of the condenser 2 is communicated with a cooling working medium inlet of the refrigerator in the cold-end cooling system. The air inlet of compressor 1 for let in air, the gas outlet of compressor 1 and the gaseous import intercommunication of condenser 2, the gaseous export of condenser 2 passes through gas flow control subassembly and cavity 4 intercommunication.
In the drying system following the cold end cooling system provided by the embodiment of the invention, the compressor applies work to the introduced air to form high-temperature and high-pressure gas. The gas inlet of the condenser is communicated with the gas outlet of the compressor, high-temperature and high-pressure gas is supplied into the condenser, and the gas outlet of the condenser is provided with the gas flow control assembly, so that the pressure of the high-pressure gas in the condenser is maintained on one hand, and the retention time of the high-pressure gas in the condenser is controlled on the other hand. The thermal liquid cooling working medium of cold junction has been absorbed in letting in the cold junction cooling system through the cooling working medium import at the condenser, on the one hand with the condenser in high-temperature high-pressure gas carry out the heat transfer, reduce high-pressure gas's temperature, can follow high-pressure gas at this in-process and separate out a large amount of comdenstion water, high-pressure gas's water content reduces, the dry gas of the low dew point of output ordinary pressure, on the other hand has realized drying system and cold junction cooling system's follow-up, can be along with cold junction cooling system to the dry degree of demand temperature variation synchronous change dry gas, can require synchronous change dry gas's dry degree along with the cold.
In the drying system following with the cold end cooling system provided by the embodiment of the invention, the following design of the drying system and the cold end cooling system is the following on the physical hardware structure design, the following reliability is high, and the following is not kept by temperature and humidity detection electronic component detection equipment. Drying system and cold junction cooling system adopt same cold source control, and the power consumption is low and guarantee drying equipment operational reliability, and when the cold source accident became invalid, cold junction cooling system and drying system became invalid simultaneously, and the cold junction temperature rose, and the dry gas dew point that drying system provided rose simultaneously, did not influence equipment safety, can not lead to producing the electronic equipment of comdenstion water damage cold junction because drying equipment part trouble.
In order to ensure that the high-pressure gas in the condenser is in a stable pressure range, the working mechanism of the compressor is as follows: when the gas pressure in the condenser reaches a set maximum value, the compressor stops working, and when the gas pressure in the condenser is lower than the minimum value, the compressor starts working. Therefore, in a reasonable interval, the compressor keeps a reasonable start-stop interval, and the gas pressure in the condenser keeps between the highest value and the lowest value.
Further, the drying system following the cold-end cooling system provided by the embodiment of the invention further comprises a gas storage tank 11, a gas inlet of the gas storage tank 11 is communicated with a gas outlet of the compressor 1, and a gas outlet of the gas storage tank 11 is in isobaric communication with a gas inlet of the condenser 2. The compressor supplies high-temperature high-pressure gas into the condenser to provide a buffer effect, a certain amount of high-pressure gas can be stored, and in the working process of ensuring that the high-pressure gas in the condenser is in a stable pressure range, the number of times of starting and stopping the compressor is reduced, and the service life of the compressor is prolonged.
Further, the drying system following the cold-end cooling system provided by the embodiment of the present invention further includes a first electromagnetic valve 12, and a condensed water outlet of the compressor 1 is drained through the first electromagnetic valve 12. Further preferably, the condensed water outlet of the condenser 2 is also drained by the first solenoid valve 12.
Further, the condenser 2 employs a water-cooled oil cooler. The principle of water-cooled oil cooler itself is that withstand voltage jar body divide into two tunnel isolated passageways each other, and first passageway lets in high temperature oil to the internal jar, exports cooling back oil again, and the second passageway has many to lead to the tubular metal resonator that has the coolant liquid, and the tubular metal resonator passes through modes such as fin or return path, lets high temperature oil and cold source carry out the heat exchange, reduces fluid temperature, and some water-cooled oil cooling tank can be equipped with the drain in the lower part for the ease of the blowdown, drain and first passageway intercommunication. In the embodiment provided by the invention, high-temperature and high-pressure gas is introduced into a first passage of the water-cooled oil cooler, a second passage is introduced into a liquid cooling working medium which absorbs heat of a cold end in a cold end cooling system, and accumulated condensed water is periodically discharged through a first electromagnetic valve by utilizing a drain outlet.
Further, the gas flow control assembly is a fixed dual flow rate control assembly 3. As shown in fig. 1, the fixed dual flow rate control assembly 3 comprises a tee fitting 31 and a second solenoid valve 32; the gas inlet of the tee pipe 31 is communicated with the gas outlet of the condenser 2, the first gas outlet of the tee pipe 31 is communicated with the cavity 4, and the second gas outlet of the tee pipe 31 is communicated with the cavity 4 through the second electromagnetic valve 32. The lowest flow rate controlled by the gas flow control assembly ensures that the positive pressure can be maintained in the cavity at any time. The gas flow control assembly controls the low-flow-rate output of the gas, the retention time of the high-pressure gas in the condenser is longer, the high-pressure gas is ensured to be fully cooled, and the drying degree of the output gas is higher; the gas flow control assembly controls high-flow-rate output of gas, and can accelerate drying speed in the initial high-humidity state of the cavity.
Of course, it is only preferable to use the fixed dual flow rate control unit 3 as the gas flow rate control unit, and it is conceivable to use a multi-step flow rate control unit or a stepless flow rate control unit as the gas flow rate control unit, and a similar effect can be achieved.
Further, the drying system following the cold-end cooling system provided by the embodiment of the present invention further includes a third electromagnetic valve 41, the cavity 4 is a sealed cavity, and the sealed cavity is exhausted through the third electromagnetic valve 41. The third electromagnetic valve properly exhausts the air of the sealed cavity, so that the pressure in the cavity can not continuously and infinitely increase.
Further, the drying system following the cold end cooling system provided by the embodiment of the present invention further includes a temperature and humidity probe 42, where the temperature and humidity probe 42 is used to measure the cold end temperature change and the dew point change of the gas in the cavity. The temperature and humidity probe has a large monitoring error on the humidity of the ultra-dry environment, and the temperature and humidity probe is used for detecting whether a cold source and a compressor of a refrigerator are in fault or not and assisting in judging the reason of the system fault. If the cold source of the refrigerator fails, the dew point measured by the probe will rise, and the temperature will rise at the same time; if the fault point is a compressor, the final dew point rises to trigger alarming, but the process is a relatively slow process, the probe monitors the slow rising of the dew point, the temperature of the probe is almost unchanged, and early warning can be carried out before alarming, so that the compressor of the system can be replaced without stopping, the fault repair is completed, and the stable operation of the system is ensured.
Further, the drying system following the cold-end cooling system provided by the embodiment of the present invention further includes a controller 5, and the controller 5 is respectively in data connection with the first electromagnetic valve 12, the second electromagnetic valve 32, the third electromagnetic valve 41, the temperature and humidity probe 42, and the refrigerator in the cold-end cooling system. Provides a foundation for the automatic control of the drying system.
Further, the refrigerator is a water chiller 6.
The dew point of the drying gas output by the drying system following the cold end cooling system provided by the embodiment of the invention is determined by three aspects, namely the pressure of the compressor, the temperature of the cooling working medium in the condenser and the flow of the drying gas.
Figure BDA0002910395400000081
When the pressure range of the gas in the condenser is determined, the average pressure value of the gas in the gas storage tank is a determined value, and the water content of the output gas is determined by the actual cooling temperature of the high-pressure gas. The slower the gas output speed is, the longer the high-pressure gas stays in the condenser, the more sufficient the high-pressure gas heat exchange is, and the closer the temperature of the high-pressure gas is to the temperature of the cooling working medium in the condenser.
The output gas flow is determined by three aspects, namely the size of the gas storage tank (the power of the compressor is matched with the size of the gas storage tank), the volume of a sealing cavity needing to be dried, the leakage rate of the drying cavity and the lowest flow speed, and the positive pressure is ensured to be kept in the cavity at any moment.
The lower the temperature of the cooling medium in the condenser, the lower the average temperature of the high-pressure gas and the lower the absolute water content of the drying gas delivered, see fig. 2.
In addition, the embodiment of the invention also provides a drying method following with the cold end cooling system, and the drying method using the drying system following with the cold end cooling system provided by the embodiment of the invention comprises the following steps:
s1, the gas flow control component controls the flow rate of the drying gas to output at a first preset value, the compressor 1 supplies high-temperature and high-pressure gas into the condenser 2, and the gas pressure in the condenser 2 is stabilized within a preset pressure range.
Specifically, the gas flow control assembly controls the flow rate of the drying gas to be output at a first preset value, and comprises: the second solenoid valve 32 is opened.
Specifically, the gas flow control assembly controls the dry gas to be output at the lowest flow speed, the temperature of the dry gas and the temperature of a cooling working medium inlet of the condenser are measured so as to determine the actual temperature difference between the dry gas and the cooling working medium, and the stable preset pressure range of the gas pressure in the condenser is selected according to the actual temperature difference and the relation between the outlet temperature of the cooling working medium of the refrigerating machine in the cold end cooling system and the dew point of the dry gas.
Specifically, in actual needs, under the condition that the maximum pressure in the preset pressure range is not changed, the lower the minimum pressure in the preset pressure range is, the lower the average pressure is, the larger the volume of the equal-pressure gas which can be stored by the gas storage tank with the same volume is, the same output initial flow rate is, and the longer the stop interval time of the compressor is, the more the compressor is favorable for long-term operation.
S2, the cold end cooling system performs stepped cooling on the cold end to an expected temperature, and the cold end cooling system performs cooling on the cold end every time, and the cooling is finished when the dew point of the dry gas is lower than the outlet temperature of the refrigerating machine cooling working medium in the cold end cooling system.
The dew point of the drying gas is reduced to be lower than the expected temperature, and the phenomenon that the temperature of a cold end cooling system is suddenly reduced in the starting process and condensed water is generated due to the fact that the dew point of the drying gas is too high is avoided. FIG. 3 is a graph showing the relationship between the outlet temperature of the refrigerant and the dew point of the dry gas.
S3, the gas flow control assembly controls the flow rate of the drying gas to be output at a second preset value, and the second preset value is smaller than the first preset value.
Specifically, the gas flow control assembly controls the flow rate of the drying gas to be output at a second preset value, and comprises: the second solenoid valve 32 is closed.
After the dew point of the drying gas is reduced to be lower than the expected temperature, only the stable operation of the drying system is required to be ensured, the gas flow control assembly controls the flow rate of the drying gas to be output at a second preset value (low flow rate), the condensation temperature in the cavity can be gradually close to the limit state, the deep drying is realized, the dew point of the drying gas is reduced to be lower than minus 40 ℃, and the generation of condensed water is avoided.
The drying method following the cold end cooling system provided by the embodiment of the invention further comprises the following steps:
s4, in the operation process of the drying system, if the temperature and humidity probe 42 monitors that the dew point of the drying gas rises and the temperature of the cold end also rises, the cold source of the refrigerator breaks down; if the temperature and humidity probe 42 detects that the dry gas dew point is rising slowly and the cold end temperature is floating, the compressor 1 is out of order.
Whether the cold source and the compressor of the refrigerator are in fault or not can be detected, and the judgment of the fault reason of the system is assisted. When the compressor fails, the early warning can be carried out before the dew point reaches the warning value, so that the compressor can be replaced without shutdown of the system, the fault repair is completed, and the stable operation of the system is ensured.
It should be understood that the above description of specific embodiments of the present invention is only for the purpose of illustrating the technical lines and features of the present invention, and is intended to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, but the present invention is not limited to the above specific embodiments. It is intended that all such changes and modifications as fall within the scope of the appended claims be embraced therein.

Claims (10)

1. A drying system following a cold end cooling system is characterized by comprising a compressor (1), a condenser (2), a gas flow control assembly and a cavity (4) for accommodating a cold end;
the cooling working medium inlet of the condenser (2) is used for introducing a liquid cooling working medium which is provided by a refrigerator in the cold end cooling system and absorbs the heat of the cold end; a cooling working medium outlet of the condenser (2) is communicated with a cooling working medium inlet of a refrigerator in the cold end cooling system;
the air inlet of the compressor (1) is used for introducing air, the air outlet of the compressor (1) is communicated with the air inlet of the condenser (2), and the air outlet of the condenser (2) is communicated with the cavity (4) through the air flow control assembly.
2. The system according to claim 1, further comprising a gas storage tank (11), a gas inlet of the gas storage tank (11) being in communication with a gas outlet of the compressor (1), a gas outlet of the gas storage tank (11) being in isobaric communication with a gas inlet of the condenser (2).
3. The system according to claim 1, characterized in that it further comprises a first solenoid valve (12), the condensed water outlet of the compressor (1) being drained by means of the first solenoid valve (12), the condensed water outlet of the condenser (2) being drained by means of the first solenoid valve (12).
4. The system according to claim 1, wherein the gas flow control assembly is a fixed dual flow rate control assembly (3);
or the gas flow control assembly is a multi-gear flow rate control assembly;
alternatively, the gas flow control assembly is a stepless flow rate control assembly.
5. System according to claim 4, characterized in that the fixed dual flow rate control assembly (3) comprises a tee (31) and a second solenoid valve (32);
a gas inlet of the three-way pipe (31) is communicated with a gas outlet of the condenser (2), a first gas outlet of the three-way pipe (31) is communicated with the cavity (4), and a second gas outlet of the three-way pipe (31) is communicated with the cavity (4) through a second electromagnetic valve (32).
6. The system according to claim 1, characterized in that it further comprises a third solenoid valve (41), the chamber (4) being a sealed chamber, the sealed chamber (4) being vented by the third solenoid valve (41).
7. The system of claim 1, further comprising a temperature and humidity probe (42), the temperature and humidity probe (42) being configured to measure cold end temperature changes and dew point changes of gases within the chamber.
8. A drying method followed by a cold end cooling system, characterized in that the use of a system according to any of claims 1 to 7, comprises:
s1, the gas flow control assembly controls the flow rate of the drying gas to be output according to a first preset value, the compressor (1) supplies high-temperature and high-pressure gas into the condenser (2), and the gas pressure in the condenser (2) is stabilized within a preset pressure range;
s2, the cold end cooling system performs stepped cooling on the cold end to an expected temperature, and each time the cold end cooling system performs cooling on the cold end, the cooling is finished when the dew point of the dry gas is lower than the outlet temperature of the refrigerating machine cooling working medium in the cold end cooling system;
s3, the gas flow control assembly controls the flow rate of the drying gas to be output at a second preset value, and the second preset value is smaller than the first preset value.
9. The method of claim 8, wherein the gas flow control assembly controls the drying gas flow rate to be output at a first preset value, comprising: opening a second solenoid valve (32);
the gas flow control assembly controls the flow rate of the drying gas to be output at a second preset value, and comprises: the second solenoid valve (32) is closed.
10. The method of claim 8, further comprising:
s4, in the operation process of the drying system, if the temperature and humidity probe (42) monitors that the dew point of the drying gas rises and the temperature of the cold end also rises, the cold source of the refrigerator breaks down; if the temperature and humidity probe (42) monitors that the dew point of the dry gas rises slowly, and the temperature of the cold end floats up and down, the compressor (1) fails.
CN202110084375.0A 2021-01-21 2021-01-21 Drying system and method following cold end cooling system Active CN112815602B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110084375.0A CN112815602B (en) 2021-01-21 2021-01-21 Drying system and method following cold end cooling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110084375.0A CN112815602B (en) 2021-01-21 2021-01-21 Drying system and method following cold end cooling system

Publications (2)

Publication Number Publication Date
CN112815602A true CN112815602A (en) 2021-05-18
CN112815602B CN112815602B (en) 2022-04-29

Family

ID=75858655

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110084375.0A Active CN112815602B (en) 2021-01-21 2021-01-21 Drying system and method following cold end cooling system

Country Status (1)

Country Link
CN (1) CN112815602B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB949924A (en) * 1962-11-07 1964-02-19 Mcfarlan Alden I Improvements in or relating to air conditioning systems including refrigeration systems
CN201168542Y (en) * 2008-03-11 2008-12-24 中国林业科学研究院林产化学工业研究所 Apparatus for continuously preparing low dew point low temperature drying air
CN201636994U (en) * 2010-03-12 2010-11-17 南京韩威南冷制冷集团有限公司 Combined dehumidifier
CN102494371A (en) * 2011-11-28 2012-06-13 杭州捷瑞空气处理设备有限公司 All-fresh-air low-dew-point dehumidifying unit
CN204294091U (en) * 2014-11-21 2015-04-29 海宁市英德赛电子有限公司 The device of continuous production low dew point low temperature drying air
CN207745669U (en) * 2017-12-28 2018-08-21 枣庄薛能天然气有限公司 A kind of continuous cooling separation prepares the device of low dew point air
CN108758807A (en) * 2018-05-25 2018-11-06 东南大学 The multi-staged air deep dehumidification apparatus of ultra-low dew point environment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB949924A (en) * 1962-11-07 1964-02-19 Mcfarlan Alden I Improvements in or relating to air conditioning systems including refrigeration systems
CN201168542Y (en) * 2008-03-11 2008-12-24 中国林业科学研究院林产化学工业研究所 Apparatus for continuously preparing low dew point low temperature drying air
CN201636994U (en) * 2010-03-12 2010-11-17 南京韩威南冷制冷集团有限公司 Combined dehumidifier
CN102494371A (en) * 2011-11-28 2012-06-13 杭州捷瑞空气处理设备有限公司 All-fresh-air low-dew-point dehumidifying unit
CN204294091U (en) * 2014-11-21 2015-04-29 海宁市英德赛电子有限公司 The device of continuous production low dew point low temperature drying air
CN207745669U (en) * 2017-12-28 2018-08-21 枣庄薛能天然气有限公司 A kind of continuous cooling separation prepares the device of low dew point air
CN108758807A (en) * 2018-05-25 2018-11-06 东南大学 The multi-staged air deep dehumidification apparatus of ultra-low dew point environment

Also Published As

Publication number Publication date
CN112815602B (en) 2022-04-29

Similar Documents

Publication Publication Date Title
CN102425872A (en) Refrigeration cycle device
CN104315767A (en) Liquid storage tank and carbon dioxide system with liquid storage tank
CN112611140A (en) Temperature control device and method
CN201014825Y (en) Centrifugal type refrigeration unit cooling system
CN112815602B (en) Drying system and method following cold end cooling system
CN207535706U (en) A kind of power battery cooling system for electronic vehicle
CN209840448U (en) High-temperature medium temperature control cold system based on compressor
CN116780034A (en) Full-immersion non-circulating flow liquid-cooled battery energy storage thermal management system
CN211625876U (en) Waste heat recovery vacuum drying system
CN210463660U (en) Ultra-low temperature air source heat pump unit with parallel compressors
CN204227777U (en) Fluid reservoir and there is the carbon dioxide system of this fluid reservoir
CN104279789B (en) A kind of trilogy supply air-conditioning system
CN111795523A (en) Air source heat pump defrosting system and defrosting method thereof
CN219494897U (en) Condenser vacuum pumping system
CN212842303U (en) Air conditioner
CN111412702A (en) Wind energy effect-improving and defrosting device and method for air conditioner
CN210274997U (en) Integral high-voltage inverter cooling device
CN111375294A (en) Large-scale freezing type drying machine with stepless energy regulation
CN219913281U (en) Energy-saving water cooling structure for dual-system central air conditioner
CN212362491U (en) Indirect cooling system for defrosting air cooler by utilizing waste heat
CN218915446U (en) Variable frequency air conditioning system with driving module adopting liquid cooling heat dissipation
CN220155618U (en) Battery thermal management temperature control system
CN216977226U (en) Heat recovery heat pump
CN117299251B (en) Working condition switching method and device for high-low temperature test box and high-low temperature test box
CN217737592U (en) Refrigerating system with cold volume uninstallation function

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant