CN117803997A - Dehumidifier unit with low dew point exceeding zero depth intelligent cleaning and control method - Google Patents
Dehumidifier unit with low dew point exceeding zero depth intelligent cleaning and control method Download PDFInfo
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- CN117803997A CN117803997A CN202311863069.2A CN202311863069A CN117803997A CN 117803997 A CN117803997 A CN 117803997A CN 202311863069 A CN202311863069 A CN 202311863069A CN 117803997 A CN117803997 A CN 117803997A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004140 cleaning Methods 0.000 title claims abstract description 16
- 238000010257 thawing Methods 0.000 claims abstract description 181
- 238000001816 cooling Methods 0.000 claims abstract description 125
- 238000011084 recovery Methods 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000009833 condensation Methods 0.000 claims abstract description 39
- 230000005494 condensation Effects 0.000 claims abstract description 38
- 230000007613 environmental effect Effects 0.000 claims abstract description 19
- 238000007791 dehumidification Methods 0.000 claims description 37
- 230000010355 oscillation Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 13
- 238000001704 evaporation Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 8
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- 238000009423 ventilation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a low dew point zero-crossing depth intelligent-cleaning dehumidifier unit and a control method, wherein the unit comprises: the system comprises a precooling system, a recooling system, a deep cooling system and a control module. The precooling system precools fresh air by using external chilled water to obtain first cold air. The sub-cooling system cools the first cold air to obtain second cold air, and performs condensation heat recovery on the third cold air so as to exhaust air outdoors; the second cold air is cooled and dehumidified by the cryogenic system in a defrosting operation state to obtain third cold air, and primary heat recovery is carried out on the third cold air, wherein the cryogenic system is provided with at least two cold air pipes; the control module is used for driving the precooling system, the sub-cooling system and at least two cryogenic systems to operate according to the environmental information and/or the operation information, and controlling the at least two cryogenic systems to operate in a defrosting operation state in a staggered mode at intervals. The stability of the moisture content of the supplied air is improved, and the air with proper temperature and humidity is output. So as to realize the recovery of condensation heat while meeting the requirement of low dew point, and can defrost rapidly without oscillation of the dew point.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to a low dew point super-zero depth intelligent dehumidification unit and a control method.
Background
In each high-precision field, each link of the obstetric and research is not supported by clean environmental control, the low dew point environmental control in the fields of biological pharmacy and new energy can only be realized by adopting a rotating wheel dehumidification technology, most of rotating wheel dehumidification materials are supplied abroad, and the rotating wheel dehumidification has the defects of double energy consumption, short life and the like compared with freezing dehumidification. When the low dew point is realized by adopting freezing dehumidification, the air supply temperature is far higher than the dew point temperature, the condensation heat is utilized to be a very friendly design, and meanwhile, the defrosting rate can be filled by properly utilizing the condensation heat, so that the problem of low-temperature ventilation defrosting is solved.
In the prior art, when the current air conditioning equipment adopts condensation dehumidification below zero, the problems of defrosting and wind temperature oscillation during the defrosting are still difficult to solve.
Disclosure of Invention
The invention aims to provide a low dew point zero-crossing depth intelligent-cleaning dehumidifier unit and a control method thereof, which are used for solving one or more technical problems in the prior art and at least providing a beneficial selection or creation condition.
The invention solves the technical problems as follows: provides a dehumidifier unit with low dew point exceeding zero depth intelligent cleaning and a control method.
An embodiment of a first aspect provided by the present invention provides a low dew point super-zero depth intelligent dehumidifier unit, including:
the precooling system is communicated with an external chilled water pipeline and is used for receiving external chilled water, and precooling fresh air by utilizing the external chilled water to obtain first cold air;
the sub-cooling system is used for receiving the first cold air, cooling the first cold air to obtain second cold air, and recovering condensation heat of third cold air so as to exhaust air outdoors;
the cryogenic system is used for receiving the second cold air, cooling and dehumidifying the second cold air in a defrosting operation state to obtain the third cold air, and performing primary heat recovery on the third cold air, wherein at least two cryogenic systems are arranged;
the control module is used for driving the precooling system, the sub-cooling system and at least two cryogenic systems to operate according to the environmental information and/or the operation information, and controlling at least two cryogenic systems to operate in a defrosting operation state in a staggered mode at intervals;
the environment information comprises fresh air dew point, air supply temperature of second cold air and air outlet temperature of the cryogenic system, and the operation information comprises return air pressure value of the cryogenic system in a defrosting operation state.
Further, the dehumidifier unit further comprises:
the indoor unit is provided with a first cavity for setting the precooling system and a second cavity for setting the cryogenic system;
the first cavity is provided with a fresh air valve, and the fresh air valve is used for introducing fresh air;
the second cavity is provided with an air supply outlet and a defrosting air valve corresponding to the cryogenic system, the second cavity is communicated with the first cavity through the defrosting air valve, and the defrosting air valve is used for leading second cold air into the second cavity.
Further, the sub-cooling system includes:
the outdoor main loop comprises an outdoor compressor, a four-way valve and an outdoor condenser which are sequentially communicated;
the first evaporator is arranged in the first cavity and communicated with the four-way valve and used for cooling the first cold air;
a recovery valve respectively communicated with the outdoor condenser and the first evaporator;
the first heat recoverer is arranged in the second cavity, is connected with the recovery valve in parallel and is used for recovering condensation heat of the third cold air.
Further, the cryogenic system comprises:
an indoor compressor;
the second evaporator is communicated with the indoor compressor and is used for cooling and dehumidifying the second cold air;
The defrosting valve is respectively communicated with the indoor compressor and the second evaporator;
and the second heat recoverer is respectively communicated with the indoor compressor and the second evaporator and is used for carrying out primary heat recovery on the third cold air.
Further, the dehumidifier unit further comprises:
the fresh air dew point detector is arranged at the fresh air valve and used for acquiring the fresh air dew point;
the air supply dew point detector is arranged at the air supply opening and used for acquiring the air supply dew point;
the first temperature detector is positioned between the second evaporator and the second heat recoverer and is used for acquiring the air outlet temperature;
the pressure detector is arranged at the air return end of the indoor compressor and is used for acquiring the air return pressure value;
and the second temperature detector is positioned between the sub-cooling system and the deep cooling system and is used for acquiring the supply air temperature of the second cold air.
Further, the pre-cooling system includes:
a two-way flow valve which is communicated with an external chilled water pipeline and receives the external chilled water input by the external chilled water pipeline;
and the precooling surface cooler is communicated with the two-way flow valve and is used for precooling fresh air by utilizing the external chilled water.
An embodiment of a second aspect provided by the present invention provides a control method of a low dew point super-zero depth intelligent cleaning dehumidifier unit, which is applied to the embodiment of the first aspect provided by the present invention, and includes:
Acquiring environmental information;
according to the environmental information, the control module drives the precooling system, the recooling system and at least two cryogenic systems to operate;
acquiring operation information;
according to the environment information and the operation information, the control module controls at least two cryogenic systems to operate in a defrosting operation state in a staggered mode at intervals;
the environment information comprises fresh air dew point, air supply temperature of second cold air and air outlet temperature of the cryogenic system, and the operation information comprises return air pressure value of the cryogenic system in a defrosting operation state.
Further, the control module drives the pre-cooling system, the sub-cooling system and the at least two cryogenic systems to operate specifically including:
when the fresh air dew point is larger than the set dew point value, the unit enters a dehumidification mode;
the control module opens a fresh air valve and a defrosting air valve, and adjusts the water inflow of external chilled water, and the pre-cooling system pre-cools fresh air by using the external chilled water to obtain first cold air;
the control module controls the sub-cooling system to cool the first cold air according to the set first cooling temperature to obtain the second cold air, and performs condensation heat recovery on the third cold air according to the air supply temperature;
And the control module controls the primary operation of the at least two cryogenic systems according to the set second cooling temperature.
Further, the controlling at least two cryogenic systems to operate in a defrosting operation state interval overlapping specifically includes:
acquiring a first operation time, and when the first operation time meets the set dehumidification time, taking one of the cryogenic systems as a defrosting system to enter a defrosting operation state;
the control module adjusts the opening of a defrosting air valve corresponding to the defrosting system according to the set closing rate, adjusts the indoor compressors in the defrosting system to a set first frequency according to the air supply dew point, and increases the operating frequency of the indoor compressors of the other cryogenic systems.
Further, the controlling at least two cryogenic systems to operate in a defrosting operation state interval overlapping specifically further includes:
when the air outlet temperature of the defrosting system reaches a set temperature value, the control module closes a defrosting air valve corresponding to the defrosting system, opens a defrosting valve in the defrosting system, and increases the indoor compressor in the defrosting system to a set second frequency;
when the return air pressure value reaches the set pressure value and maintains the first time period, the control module controls the defrosting system to exit the defrosting operation state so as to close a defrosting valve in the defrosting system, open a defrosting air valve corresponding to the defrosting system and regulate and control an indoor compressor in the defrosting system;
And the control module controls the primary operation of the other cryogenic systems and the defrosting system, acquires the first operation time again, and selects the defrosting system from the other cryogenic systems.
The beneficial effects of the invention are as follows: the fresh air is sequentially cooled through the pre-cooling system and the sub-cooling system, and is subjected to overlapping operation at intervals in a defrosting operation state through at least two sub-cooling systems, the second cold air is cooled and dehumidified, the stability of the air supply moisture content is improved, in the cooling and dehumidifying process, the sub-cooling systems and the sub-cooling systems are used for indirect overlapping type step heat recovery arrangement, and air with proper temperature and humidity is output. The system is matched and combined in a simple way, so that the condensation heat recovery is realized while the low dew point is met, the frost can be quickly melted, the dew point does not vibrate, and the problems that the production environmental control cannot be stably used due to fluctuation of the defrosting when condensation dehumidification is adopted below the zero-DEG C dew point and the defrosting cannot be performed in a low-temperature ventilation state are solved.
The problems that when the existing air conditioner is lower than zero-degree dew point environmental control requirement, the energy consumption of a rotating wheel is overlarge, the operation and maintenance are complex, the refrigerating performance of a condensation dehumidification system is low, and the phenomenon of reasonably utilizing condensation heat is avoided are solved.
Drawings
FIG. 1 is a schematic diagram of a portion of a dehumidifier unit with a low dew point exceeding zero depth intelligent cleaning according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a sub-cooling system of a low dew point super zero depth intelligent dehumidification unit according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a low dew point over zero depth intelligent dehumidifier unit according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a low dew point super zero depth intelligent dehumidifier unit according to an embodiment of the present invention.
Reference numerals: 100. the indoor unit comprises an indoor unit, 110, a first cavity, 111, a fresh air valve, 120, a second cavity, 121, an air supply outlet, 122, a defrosting air valve, 130, a pressurized centrifugal fan, 140, a primary filter, 150 and a medium-efficiency filter;
200. precooling system: 210. a two-way flow valve, 220, pre-cooling surface cooler;
300. and (3) a sub-cooling system: 310. an outdoor main loop 311, an outdoor compressor 312, a four-way valve 313, an outdoor condenser 320, a recovery valve 330, a first evaporator 340 and a first heat recovery device;
400. cryogenic system: 410. an indoor compressor 420, a second evaporator 430, a defrosting valve 440, a second heat recoverer 450 and an expansion valve;
500. Pressure detector 510, first temperature detector 520, second temperature detector 530, third temperature detector 540, fresh air dew point detector 550, air supply dew point detector 560, wind speed detector.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the invention.
It should be noted that although functional block diagrams are depicted in the system diagrams, in some cases, the steps shown or described may be performed in a different order than the block diagrams or flowchart illustrations in the system. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be determined reasonably by a person skilled in the art in combination with the specific contents of the technical solution.
The coefficient of performance (COP, coefficient Of Performance), also known as the coefficient of performance, refers to the amount of cooling that can be achieved per unit of power consumption, and is an important technical economic indicator for refrigeration systems (refrigerators). The large refrigeration performance coefficient indicates high energy utilization efficiency of the refrigeration system (refrigerator).
Referring to fig. 1 to 3, in some embodiments of the first aspect of the present invention, a low dew point over zero depth smart dehumidifier unit comprises: precooling system 200, sub-cooling system 300, cryogenic system 400, and control modules.
The pre-cooling system 200 is communicated with the sub-cooling system 300, the sub-cooling system 300 is communicated with the sub-cooling system 400, fresh air can flow through the pre-cooling system 200, the sub-cooling system 300 and the sub-cooling system 400 in sequence, cooling and dehumidification are carried out, and finally the fresh air is discharged outside.
The pre-cooling system 200 is communicated with an external chilled water pipeline, the pre-cooling system 200 receives chilled water input by the external chilled water pipeline, pre-cools fresh air through the external chilled water, and obtains first cold air, and the first cold air flows to the sub-cooling system 300.
The sub-cooling system 300 receives the first cold air, cools the first cold air, and obtains a second cold air, which flows to the sub-cooling system 400. The sub-cooling system 300 also performs condensation heat recovery on the third cool air, and the third cool air after the condensation heat recovery is discharged outside.
The cryogenic system 400 receives the second cold air, and performs cooling and dehumidification on the second cold air in the defrosting operation state to obtain third cold air. The cryogenic system 400 also performs primary heat recovery on the three cold air, and the third cold air after the primary heat recovery flows into the sub-cooling system 300 to perform condensation heat recovery, so as to solve the problem that the third cold air cannot be directly discharged outdoors due to low-temperature drying.
Wherein at least two cryogenic systems 400 are provided in the present unit. When dehumidification is performed at a temperature lower than zero, only one cryogenic system 400 is used, which results in a high moisture content of the third cold air discharged outdoors and a phenomenon that the stability of the moisture content of the third cold air is poor when the cryogenic system 400 is in a defrosting operation state.
That is, the fresh air is pre-cooled by external chilled water in the pre-cooling system 200 to obtain first cold air, then is cooled by the direct-expansion sub-cooling system 300, the sub-cooling system 300 is operated without frost for a long time, so that the second cold air reaches the set first cooling temperature of 2 ℃, and finally is subjected to deep dehumidification cooling by at least two direct-expansion sub-cooling systems 400, and third cold air reaching a specified temperature range is output, wherein the specified temperature range is 0 ℃ to-20 ℃.
Since the low-temperature dried air cannot be directly discharged outside, the low-evaporation low-condensation grade is achieved through the primary heat recovery of at least two cryogenic systems 400 to accomplish the total heat recovery. Then, the first heat recoverer 340 in the sub-cooling system 300 is used for heat recovery and heating, so that the condensing grade in the middle evaporation is realized, and the extra heat except the supply air temperature is exhausted through the outdoor high-temperature air by the outdoor condenser 313 in the sub-cooling system 300, so that the electric heating investment is not needed in summer. By the indirect cascade heat recovery arrangement adopted by the sub-cooling system 300 and the cryogenic system 400, condensation heat recovery of the unit is realized, that is, the sub-cooling system 300 adopts a cascade condensation mode for heat recovery and heating, and at least two cryogenic systems 400 adopt full heat recovery for heat recovery.
The control module controls the operation of the pre-cooling system 200, the sub-cooling system 300 and at least two cryogenic systems 400 through the environmental information, and regulates and controls the operation defrosting actions of the at least two cryogenic systems 400 in a spaced overlapping mode through the environmental information and the operation information.
The control module can drive the system to operate through the operation information. The above embodiments are merely exemplary descriptions of the case where the control module drives the above system through information, and these examples should not be construed as limiting the present invention, and detailed descriptions thereof are omitted in this embodiment.
The environment information includes: fresh air dew point, supply air temperature of the second cold air, and air outlet temperature of the cryogenic system 400. The operation information includes: the return air pressure value of cryogenic system 400 during defrost operation.
In the solution of the foregoing embodiment, the pre-cooling system 200 and the sub-cooling system 300 are used to cool fresh air in sequence, and the at least two sub-cooling systems 400 are used to perform the overlapping operation defrosting action at intervals, so as to cool and dehumidify the second cold air, improve the stability of the moisture content of the supplied air, and in the cooling and dehumidifying process, the sub-cooling systems 300 and the sub-cooling systems 400 are used to output air with proper temperature and humidity by adopting indirect overlapping step heat recovery arrangement. The problems of defrosting and vibration of the unit when the temperature is lower than zero degree in the existing air conditioner are solved, and the system is matched and combined in a simple mode, so that condensation heat recovery is achieved while low dew point is met, and the unit can be quickly defrosted without vibration of the dew point.
The method solves the problems that when the existing air conditioner is lower than zero-degree dew point environmental control requirement, the energy consumption of a rotating wheel is overlarge, the operation and maintenance are complex, the refrigeration performance (cop) of a condensation dehumidification system is low, and the phenomenon of reasonably utilizing condensation heat is not caused.
Solves the problems that the production environmental control cannot be stably used due to defrosting fluctuation and the defrosting cannot be performed in a low-temperature ventilation state when condensation dehumidification is adopted at the dew point lower than zero.
Referring to fig. 1 to 3, in some embodiments of the first aspect of the present invention, the dehumidifying unit further comprises: indoor unit 100, pressurized centrifugal fan 130, primary filter 140, and secondary filter 150.
The indoor unit 100 is provided with a first cavity 110 and a second cavity 120, the first cavity 110 is provided with a precooling system 200, a pressurized centrifugal fan 130, a primary filter 140 and a secondary filter 150, and the second cavity 120 is provided with a cryogenic system 400. The first chamber 110 is provided with a fresh air valve 111, and fresh air flows into the indoor unit 100 through the fresh air valve 111, and the pressurized centrifugal fan 130 operates according to a specified frequency or a specified air volume to drive the fresh air to sequentially flow through the primary filter 140, the intermediate filter 150, the precooling system 200, the recooling system 300 and the deep cooling system 400.
The primary filter 140 and the secondary filter 150 are used for filtering fresh air and removing particulate matters in the air.
The second chamber 120 is provided with an air supply port 121, and the third cool air is discharged outside through the air supply port 121 after being recovered by the condensation heat of the recooling system 300.
The second cavity 120 is further provided with defrosting air valves 122, and the defrosting air valves 122 are arranged corresponding to the cryogenic system 400, that is, the number of the cryogenic system 400 corresponds to the number of the defrosting air valves 122. Through defrosting air valve 122, first cavity 110 is in communication with second cavity 120, and second cavity 120 is capable of receiving second cold air for cooling and dehumidifying by corresponding cryogenic system 400.
In the solution of the above embodiment, the fresh air realizes multistage air filtration through the primary filter 140 and the secondary filter 150, filters impurities such as ultrafine particulate matters and air solubility, and realizes multistage water washing and frosting deep purification through the precooling system 200, the recooling system 300 and the deep cooling system 400, so as to realize intelligent purification of the fresh air by a unit and improve air supply quality.
Referring to fig. 1-3, in some embodiments of the first aspect of the present invention, a pre-cooling system 200 includes: a two-way flow valve 210 and a pre-chilled surface cooler 220.
One end of the precooling surface cooler 220 is communicated with an external chilled water pipeline, the other end of the precooling surface cooler 220 is communicated with one end of the two-way flow valve 210, and the other end of the two-way flow valve 210 is communicated with the external chilled water pipeline.
Through the two-way flow valve 210, the inflow of the input external chilled water is regulated, the pre-cooling surface cooler 220 exchanges heat with the fresh air through the external chilled water, thereby realizing pre-cooling, and the chilled water after heat exchange is returned to the chilled water pipeline. Wherein the temperature of the external chilled water may range from 7 ℃ to 12 ℃.
Referring to fig. 1-3, in some embodiments of the first aspect of the invention, a sub-cooling system 300 includes: an outdoor main circuit 310, a recovery valve 320, a first evaporator 330, and a first heat recoverer 340.
The outdoor main circuit 310 includes an outdoor compressor 311, a four-way valve 312, and an outdoor condenser 313, which are sequentially connected. The outdoor main circuit 310 is an external circuit and is disposed outside the indoor unit 100.
The first evaporator 330 is installed inside the first chamber 110, one end of the first evaporator 330 is communicated with the outdoor condenser 313 through the recovery valve 320, and the other end of the first evaporator 330 is communicated with the four-way valve 312.
The control module adjusts the frequency of the outdoor compressor 311 according to the set first cooling temperature, so that the first evaporator 330 cools the first cool air to the set first cooling temperature, thereby obtaining the second cool air. The first heat recoverer 340 is connected in parallel with the recovery valve 320, that is, one end of the recovery valve 320 and one end of the first heat recoverer 340 are both in communication with one end of the first evaporator 330, and the other end of the recovery valve 320 and the other end of the first heat recoverer 340 are both in communication with the outdoor condenser 313.
In this embodiment, the sub-cooling system 300 is a direct expansion unit, and the control module adjusts the frequency of the outdoor compressor 311 according to the set first cooling temperature, so that the first evaporator 330 operates without frost for a long period of time, and cools the first cool air again to reach the set first cooling temperature, so as to obtain the second cool air, where the set first cooling temperature may be 2 ℃.
Since the low-temperature dried air cannot be directly discharged to the outside, the low evaporation and low condensation grade is achieved through the primary heat recovery of at least two cryogenic systems 400, and the total heat recovery of the first step is achieved. And then the first heat recoverer 340 is used for heat recovery and heating, so that the grade of condensation in middle evaporation is realized, the heat recovery of the second step is realized, the heat recovery of the third step is realized by an external outdoor condenser 313, the redundant heat except the supply air temperature is exhausted by the outdoor high-temperature air, the electric heating investment is not needed in summer, the adjustable heat recovery of the sub-cooling system 300 by utilizing the step condensation technology is realized, and the adjustable heat recovery of the sub-cooling system 300 is realized.
Solves the problem that the cop is lower under partial heat recovery when the existing air conditioner is provided with three pipes connected in parallel for condensation recovery.
Referring to fig. 1-3, in some embodiments of the first aspect of the present invention, a cryogenic system 400 comprises: an indoor compressor 410, a second evaporator 420, a defrosting valve 430, and a second heat recoverer 440.
The second evaporator 420 is disposed at one side of the defrosting air valve 122, and cools the second cold air entering the second cavity 120 through the defrosting air valve 122 to obtain a third cold air. The second evaporator 420 communicates with the indoor compressor 410.
The control module adjusts the frequency of the outdoor compressor 311 to a designated operating frequency according to a set second cooling temperature, which may be-7 ℃. The control module further controls the outdoor compressor 311 to operate at an operation frequency corresponding to the defrosting operation state, so that the second evaporator 420 cools and dehumidifies the second cold air in the defrosting operation state, and the second cold air reaches a set temperature value, thereby obtaining third cold air.
The indoor compressor 410 communicates with a defrosting valve 430, and the defrosting valve 430 communicates with the second evaporator 420. One end of the second heat recoverer 440 is in communication with the second evaporator 420, and one end of the second heat recoverer 440 is in communication with the indoor compressor 410. The third cool air is subjected to total heat recovery heating by the second heat recoverer 440.
Wherein several cryogenic systems 400 may share a second heat recovery vessel 440. Cryogenic system 400 further comprises: an expansion valve 450. One end of the expansion valve 450 is communicated with the second evaporator 420, and the other end of the expansion valve 450 is communicated with the second heat recoverer 440, so that the second evaporator 420 is communicated with the second heat recoverer 440.
In this embodiment, when dehumidification is performed at a temperature lower than zero, only one cryogenic system 400 is used, which results in a high moisture content of the third cold air discharged from the outdoor space and a poor stability of the moisture content of the third cold air which is easily caused when the cryogenic system 400 is in a defrosting operation state. When defrosting cannot be used, the fin frost is subjected to a heat recovery mode of ice releasing and cooling, and cooling and dehumidification are performed by deeply utilizing the latent heat of solid-liquid transformation accumulated in the frosting and dehumidification process.
Referring to fig. 1 to 3, in some embodiments of the first aspect of the present invention, the dehumidifying unit further comprises: a pressure detector 500, a first temperature detector 510, a second temperature detector 520, a third temperature detector 530, a fresh air dew point detector 540, a blowing dew point detector 550, and a wind speed detector 560.
The fresh air dew point detector 540 is provided at the inlet of the fresh air valve 111, and detects the dew point of the fresh air entering the indoor unit 100 to obtain the fresh air dew point.
The third temperature detector 530 is located between the pre-cooling surface cooler 220 and the first evaporator 330, the third temperature detector 530 detects the temperature of the first cold air, and the control module can adjust the opening of the two-flow valve according to the temperature of the first cold air, thereby adjusting the inflow of external chilled water.
The second temperature detector 520 is located between the first evaporator 330 and the defrosting air valve 122, the second temperature detector 520 detects the temperature of the second cold air to obtain the air supply temperature, and the control module can adjust the operation frequency of the outdoor compressor 311 according to the air supply temperature.
The first temperature detector 510 is located between the second evaporator 420 and the second evaporator 420, and the first temperature detector 510 detects the air temperature of the second cold air after the second evaporator 420 performs the heat exchange treatment to obtain the air outlet temperature, so that the control module can adjust the operation frequency of the indoor compressor 410 according to the air outlet temperature.
Wherein a first temperature detector 510 is disposed in each cryogenic system 400.
The air-sending dew point detector 550 is disposed at the air-sending opening 121 and behind the first heat recoverer 340, and the air-sending dew point detector 550 detects the dew point of the third cold air discharged outside to obtain the air-sending dew point.
The pressure detector 500 is installed at the return air end of the indoor compressor 410, and detects the return air pressure of the indoor compressor 410 to obtain a return air pressure value.
Wherein the indoor compressors 410 in each cryogenic system 400 are provided with a pressure detector 500.
The wind speed detector 560 is located between the pre-cooling surface cooler 220 and the first evaporator 330, the wind speed detector 560 is used for detecting the wind speed of the pressurized centrifugal fan 130, and the wind speed detector 560 is connected with the control module. The control module adjusts the rotational speed of the pressurized centrifugal fan 130 based on the operating wind speed.
In this embodiment, the above detector collects environmental information of the unit operation and operation information of the unit during operation, so as to regulate and control devices in each system.
Referring to fig. 4, in some embodiments of the second aspect of the present invention, a method for controlling a dehumidifier unit with low dew point exceeding zero limit depth intelligent cleaning is applied to a dehumidifier unit with low dew point exceeding zero limit depth intelligent cleaning in the embodiment of the first aspect of the present invention, and the method for controlling a dehumidifier unit with low dew point exceeding zero limit depth intelligent cleaning includes the following steps:
S100, acquiring environment information.
In this embodiment, all valves in the unit are initialized, the pressurized centrifugal fan is started, and a fresh air dew point detector is used to detect the dew point of fresh air entering the indoor unit, so as to obtain the fresh air dew point. And detecting the temperature of the second cold air by adopting a second temperature detector to obtain the air supply temperature. The first temperature detector detects the air temperature after the second evaporator carries out heat exchange treatment on the second cold air, and the air outlet temperature is obtained. Wherein, each cryogenic system is provided with a first temperature detector. The air supply dew point detector detects the dew point of the third cold air discharged outdoors to obtain an air supply dew point.
And S200, driving the precooling system, the recooling system and at least two cryogenic systems to operate by the control module according to the environmental information.
In this embodiment, the operation mode of the unit is confirmed by using the fresh air dew point in the environmental information obtained in S100. The operation module of the unit comprises: ventilation mode, dehumidification mode, and heat pump mode.
And comparing the fresh air dew point with the set dew point value, and confirming the running mode adopted by the unit. And the control module correspondingly drives the precooling system, the recooling system and at least two cryogenic systems to operate through the confirmed operation modes.
In this embodiment, when the unit operates in a dehumidification mode, fresh air to be dehumidified is processed, the control module opens the fresh air valve and the defrosting air valve, drives the pressurized centrifugal fan to operate according to a specified frequency or a specified air volume, drives the precooling system to operate, precools fresh air, drives the sub-cooling system to cool and recover condensation heat, and drives at least two sub-cooling systems to initially operate and recover the initial heat, so that the defrosting action is performed by overlapping at least two sub-cooling systems at intervals.
When the unit operates in a ventilation mode, fresh air which is sufficiently dry and does not need dehumidification is processed, and the control module opens the fresh air valve and the defrosting air valve to drive the pressurizing centrifugal fan to operate according to the specified frequency or the specified air quantity.
When the unit operates in a heat pump mode, fresh air which is sufficiently dry and does not need dehumidification but has a heating requirement is processed, and the control module opens the fresh air valve and the defrosting air valve to drive the pressurized centrifugal fan to operate according to the specified frequency or the specified air quantity. The control module drives the sub-cooling system to perform heat pump circulation, and the low-temperature air is heated and regulated.
In the present invention, the dehumidification mode of the dehumidification unit is mainly described in detail, and other operation modes are not described in detail, so that other operation modes cannot be used as limitations of the unit in the present invention.
S300, acquiring operation information.
In this embodiment, operational information during the initial operation of at least two cryogenic systems in S200 is detected. And detecting the return air pressure of the indoor compressors corresponding to at least two cryogenic systems by adopting a pressure detector to obtain a return air pressure value.
Wherein, the indoor compressor in each cryogenic system is provided with a pressure detector.
S400, controlling at least two cryogenic systems to operate in a defrosting operation state in a staggered mode by a control module according to the environment information and the operation information.
In this embodiment, according to the environmental information obtained in S100 and the operation information of S300, after the at least two cryogenic systems initially operate in S200, the control module regulates the at least two cryogenic systems to perform the interval overlapping defrosting operation.
In the scheme of the embodiment, the fresh air is sequentially cooled through the pre-cooling system and the sub-cooling system, and is subjected to overlapping operation at intervals in a defrosting operation state through at least two sub-cooling systems, the second cold air is cooled and dehumidified, the stability of the air supply moisture content is improved, and in the cooling and dehumidifying process, the sub-cooling systems and the sub-cooling systems are used for indirect overlapping step heat recovery arrangement, so that air with proper temperature and humidity is output. The problems of defrosting and vibration of the unit when the temperature is lower than zero degree in the existing air conditioner are solved, and the system is matched and combined in a simple mode, so that condensation heat recovery is achieved while low dew point is met, and the unit can be quickly defrosted without vibration of the dew point.
In an embodiment of the second aspect of the present invention, in S200, the driving process of the control module specifically includes the following steps:
and S210, when the fresh air dew point is larger than the set dew point value, confirming that the unit enters a dehumidification mode.
In this embodiment, the fresh air dew point is compared with the set dew point value, and when the fresh air dew point is greater than the set dew point value, the operation mode adopted by the unit is confirmed to be a dehumidification mode.
S220, opening a fresh air valve and a defrosting air valve, adjusting the water inflow of external chilled water, precooling fresh air by a precooling system through the external chilled water, and outputting first cold air.
In this embodiment, the control module drives the fresh air valve to open, drives the defrosting air valve to open, and drives the pressurized centrifugal fan to operate according to the specified frequency or the specified air volume. The control module adjusts the opening of the two-way flow valve, the precooling surface cooler utilizes external chilled water to cool fresh air preliminarily, and the precooling system outputs first cold air to realize precooling.
S230, driving the sub-cooling system to cool the first cold air according to the set first cooling temperature, outputting the first cold air, and recovering condensation heat of the third cold air according to the air supply temperature.
In this embodiment, the control module adjusts an operating frequency of the outdoor compressor according to the set first cooling temperature, and the first evaporator cools the first cool air and outputs the second cool air. According to the air supply temperature of the second cold air, the opening degree of the recovery valve is adjusted, heat recovery heating is carried out through the first heat recoverer, and excessive heat except the air supply temperature is exhausted through outdoor high-temperature air through the outdoor condenser, so that electric heating investment is not needed in summer. The sub-cooling system adopts a step condensation mode to realize adjustable heat recovery. Wherein the first cooling temperature may be set to 2 ℃.
And controlling the primary operation of at least two cryogenic systems by the control module according to the set second cooling temperature. Wherein the second cooling temperature may be-7 ℃. That is, the control module adjusts the indoor compressors corresponding to the at least two cryogenic systems according to the requirement of-7 ℃ and controls the indoor compressors corresponding to the at least two cryogenic systems to operate at a specified operating frequency so as to realize the initial operation of the at least two cryogenic systems.
In some embodiments of the present invention, in S400, at least two cryogenic systems are operated in a defrosting operation state interval overlapping specifically comprising the following steps:
s410, acquiring first operation time, and when the first operation time meets the set dehumidification time, taking one of the cryogenic systems as a defrosting system, wherein the cryogenic system operates in a defrosting operation state.
In this embodiment, in S200, after the control module drives at least two cryogenic systems to operate initially, the control module detects a first operation time of the at least two cryogenic systems to operate initially, and determines whether the first operation time reaches a set dehumidification time.
If yes, one of the cryogenic systems operates in a defrosting operation state, the cryogenic system is regarded as the defrosting system, the control module regulates and controls the cryogenic system, and the other cryogenic systems continue to operate in an initial operation state. The first running time may be 90min.
S420, the control module adjusts the opening of a defrosting air valve corresponding to the defrosting system at the set closing rate, adjusts the frequency of an indoor compressor in the defrosting system through the air supply dew point, reduces the frequency to the set first frequency, and increases the frequency of the indoor compressors corresponding to the rest of the cryogenic units.
In this embodiment, the defrosting air valve corresponding to the defrosting system is turned down to a specified opening degree according to the set closing rate, and is maintained for a certain time. Meanwhile, the indoor compressor in the defrosting system is reduced in frequency to a first frequency according to a specified rate, and at the moment, the control module regulates and controls the defrosting system through the air supply dew point. Wherein the first frequency is set to 20Hz.
The control module controls the other cryogenic systems to raise the frequency according to the specified speed. The control objects of the indoor compressors corresponding to the other cryogenic systems are switched from the corresponding air outlet temperature control to the air supply dew point control, and the air supply dew point is not lower than the set air supply dew point value.
When the control module adjusts the opening of the defrosting air valve corresponding to the defrosting system, the air speed detector obtains the running air speed of the pressurized centrifugal fan, and the control module controls the pressurized centrifugal fan to run at a constant air speed by adjusting the rotating speed of the pressurized centrifugal fan according to the running air speed.
That is, the control module regulates and controls other cryogenic systems through the air supply dew point, and the air supply dew point is not lower than the set air supply dew point value. Because the defrosting system is in the frequency reduction, then the air-out temperature can have certain deviation, need switch to supply air dew point and regulate and control to realize accurate regulation and control.
And S430, when the air outlet temperature of the defrosting system reaches a set temperature value, the control module closes a defrosting air valve corresponding to the defrosting system, opens the defrosting valve in the defrosting system, and increases the indoor compressor in the defrosting system to a set second frequency.
In this embodiment, the outlet air temperature of the defrosting system is detected, and it is determined whether the outlet air temperature of the defrosting system reaches a set temperature value. If yes, a defrosting air valve corresponding to the defrosting system is closed, and the defrosting valve in the defrosting system is opened. And determining the ice storage and release degree in the step S420 through the air outlet temperature.
That is, when the ice accumulation and the desorption reach a certain degree, that is, when the air outlet temperature of the defrosting system reaches a set temperature value, the control module directly closes the defrosting air valve corresponding to the defrosting system, the opening of the defrosting air valve is zero, and the control module controls the indoor compressor in the defrosting system to raise the frequency to a set second frequency.
In the embodiment, partial condensation heat of the rest of the cryogenic systems is transferred to the defrosting system by opening the defrosting valve in the defrosting system, and alternate indirect overlapping is realized, so that the defrosting system can defrost quickly, and the rest of the defrosting systems can realize deep condensation.
S440, detecting a return air pressure value in the defrosting system, and when the return air pressure value maintains the set pressure value in the first time period, controlling the defrosting system to finish defrosting action by the control module so as to close a defrosting valve in the defrosting system, opening a defrosting air valve corresponding to the defrosting system and regulating and controlling an indoor compressor in the defrosting system.
In this embodiment, it is detected whether the return air pressure value in the defrosting system reaches the set pressure value and is maintained at the set pressure value for a first period of time.
If yes, the control module finishes the defrosting operation state of the defrosting system, in the defrosting system, the defrosting valve is closed, the indoor compressor operates for a second time period at a specified operation frequency, the opening degree of the expansion valve is kept unchanged for the second time period, and the defrosting air valve corresponding to the defrosting system is opened according to the set opening rate. The control module is switched from regulating and controlling the defrosting system through the air supply dew point to regulating and controlling the defrosting system through the air outlet temperature.
S450, the control module controls the other cryogenic systems and the defrosting system to operate initially, acquires the first operation time again, and selects the defrosting system from the other cryogenic systems.
In this embodiment, after the defrosting operation is finished, the control module controls the remaining cryogenic systems and the defrosting system to operate initially at the same time again, and the corresponding indoor compressor operates at a designated operating frequency according to the set second cooling temperature (-7 ℃).
Returning to S410, the control module detects the first operation time again, and when the first operation time meets the set dehumidification time, the defrosting system is selected from the rest of the cryogenic systems, so that the cyclic operation is realized, and at least two cryogenic systems can be operated in a staggered mode at intervals.
Through S410 to S450, through the cryogenic unit of interval cascade defrosting, solid latent heat of ice is transferred to air cooling dehumidification, cooling dehumidification is realized to third cold wind, and the stability of the moisture content of third cold wind is improved.
In some embodiments of the present invention, when the first cryogenic system and the second cryogenic system are used as examples for performing the round defrosting, S410 to S450 are specifically:
And detecting first operation time of the two cryogenic systems, and controlling the first cryogenic systems to enter a defrosting operation state by the control module when the first operation time meets 90 min.
The control module controls the defrosting air valve corresponding to the first cryogenic system to be closed to a specified opening degree according to a specified closing rate, and maintains for a certain time. Meanwhile, the control module controls the indoor compressor of the first cryogenic system to be reduced to 20Hz according to the specified speed, and the control module regulates and controls the first cryogenic system through the air supply dew point.
The control module controls the indoor compressor of the second cryogenic system to raise the frequency according to the specified speed, and the regulation object of the control module is switched from the air outlet temperature of the second cryogenic system to the air supply dew point so as to regulate and control the second cryogenic system.
When the air outlet temperature of the first cryogenic system reaches a set temperature value, the control module closes a defrosting air valve corresponding to the first cryogenic system, opens the defrosting valve of the first cryogenic system, and controls the indoor compressor of the second cryogenic system to be increased to a set second frequency according to a specified speed.
Detecting an air return pressure value of the first cryogenic system, determining the air return pressure value to a set pressure value and maintaining the air return pressure value for 3 minutes, ending defrosting action by the first cryogenic system, operating the indoor compressor for 3 minutes at a specified operating frequency in the first cryogenic system, maintaining the opening of the expansion valve for 3 minutes unchanged, and opening the corresponding defrosting air valve according to a set opening rate. The control module is switched to regulate and control the first cryogenic system through the air outlet temperature.
And controlling the first cryogenic system and the second cryogenic system to operate at the same time, detecting the first operation time of the two cryogenic systems, and enabling the second cryogenic system to enter a defrosting operation state when the first operation time meets 90 minutes.
That is, the first cryogenic system and the second cryogenic system are initially operated for a first operation time, the first cryogenic system enters a defrosting operation state, and the second cryogenic system is still initially operated;
the defrosting of the first cryogenic system is finished, and the first cryogenic system and the second cryogenic system initially operate for a first operation time;
the first cryogenic system still runs initially, and the second cryogenic system enters a defrosting running state;
the defrosting of the second cryogenic system is finished, and the first cryogenic system and the second cryogenic system initially operate for a first operation time;
the first cryogenic system enters a defrosting operation state, and the second cryogenic system still operates initially;
the above process loops.
The working principle and the application method of the unit, such as a system auxiliary mode of adding a liquid storage device, a liquid cooling driving plate, an air injection enthalpy-increasing economizer and the like in a refrigerating system, and adding other functional sections and adjusting the sequence of the functional sections on the indoor machine side are all within the protection scope of the invention;
the variable frequency or fixed frequency and oil or oil-free series of the compressor, including the compressors of piston, rotor, vortex, screw, centrifugal, magnetic suspension, air suspension, etc. are all within the protection scope of the invention;
By utilizing the principle, fluorine pump circulation is introduced, and natural cooling technology is further realized by adopting a serial connection mode and a parallel connection mode, and the natural cooling technology is within the protection scope of the invention, namely a liquid pump, an air pump, a centrifugal pump, a gear pump and the like; by utilizing the principle, a multi-split system is introduced, and a self-cleaning mode of connecting two or more evaporators in parallel is adopted in the protection scope of the invention; by utilizing the principle, the condensation heat dissipation modes comprise air cooling, water cooling, direct (indirect) evaporation condensation, condensation heat accumulation or various combination modes and the like, which are all within the protection scope of the invention; by utilizing the principle, the evaporation heat absorption modes comprise direct evaporation cold air, direct evaporation cold water, direct evaporation cold storage, or various combination modes and the like, which are all within the protection scope of the invention; by utilizing the principle, the hot gas defrosting is changed into the heat pump defrosting, which is within the protection scope of the invention.
Those skilled in the art will appreciate that many modifications are possible in which the invention is practiced without departing from its scope or spirit, e.g., features of one embodiment can be used with another embodiment to yield yet a further embodiment. Preferred embodiments of the disclosed embodiments are described above with reference to the accompanying drawings, and thus do not limit the scope of the claims of the disclosed embodiments. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present disclosure shall fall within the scope of the claims of the embodiments of the present disclosure.
Claims (10)
1. The utility model provides a low dew point surpasses intelligent clean dehumidification unit of zero limit degree of depth which characterized in that includes:
the precooling system is communicated with an external chilled water pipeline and is used for receiving external chilled water, and precooling fresh air by utilizing the external chilled water to obtain first cold air;
the sub-cooling system is used for receiving the first cold air, cooling the first cold air to obtain second cold air, and recovering condensation heat of third cold air so as to exhaust air outdoors;
the cryogenic system is used for receiving the second cold air, cooling and dehumidifying the second cold air in a defrosting operation state to obtain the third cold air, and performing primary heat recovery on the third cold air, wherein at least two cryogenic systems are arranged;
the control module is used for driving the precooling system, the sub-cooling system and at least two cryogenic systems to operate according to the environmental information and/or the operation information, and controlling at least two cryogenic systems to operate in a defrosting operation state in a staggered mode at intervals;
the environment information comprises fresh air dew point, air supply temperature of second cold air and air outlet temperature of the cryogenic system, and the operation information comprises return air pressure value of the cryogenic system in a defrosting operation state.
2. The dehumidifier unit of claim 1, further comprising:
the indoor unit is provided with a first cavity for setting the precooling system and a second cavity for setting the cryogenic system;
the first cavity is provided with a fresh air valve, and the fresh air valve is used for introducing fresh air;
the second cavity is provided with an air supply outlet and a defrosting air valve corresponding to the cryogenic system, the second cavity is communicated with the first cavity through the defrosting air valve, and the defrosting air valve is used for leading second cold air into the second cavity.
3. The low dew point ultra zero depth intelligent dehumidifier unit of claim 2, wherein said sub-cooling system comprises:
the outdoor main loop comprises an outdoor compressor, a four-way valve and an outdoor condenser which are sequentially communicated;
the first evaporator is arranged in the first cavity and communicated with the four-way valve and used for cooling the first cold air;
a recovery valve respectively communicated with the outdoor condenser and the first evaporator;
the first heat recoverer is arranged in the second cavity, is connected with the recovery valve in parallel and is used for recovering condensation heat of the third cold air.
4. The dehumidifier unit of claim 2, wherein the cryogenic system comprises:
an indoor compressor;
the second evaporator is communicated with the indoor compressor and is used for cooling and dehumidifying the second cold air;
the defrosting valve is respectively communicated with the indoor compressor and the second evaporator;
and the second heat recoverer is respectively communicated with the indoor compressor and the second evaporator and is used for carrying out primary heat recovery on the third cold air.
5. The dehumidifier unit of claim 4, further comprising:
the fresh air dew point detector is arranged at the fresh air valve and used for acquiring the fresh air dew point;
the air supply dew point detector is arranged at the air supply opening and used for acquiring the air supply dew point;
the first temperature detector is positioned between the second evaporator and the second heat recoverer and is used for acquiring the air outlet temperature;
the pressure detector is arranged at the air return end of the indoor compressor and is used for acquiring the air return pressure value;
and the second temperature detector is positioned between the sub-cooling system and the deep cooling system and is used for acquiring the supply air temperature of the second cold air.
6. The dehumidifier unit of claim 1, wherein the pre-cooling system comprises:
a two-way flow valve which is communicated with an external chilled water pipeline and receives the external chilled water input by the external chilled water pipeline;
and the precooling surface cooler is communicated with the two-way flow valve and is used for precooling fresh air by utilizing the external chilled water.
7. A control method of a low dew point zero crossing depth intelligent cleaning dehumidifier unit, which is characterized in that the control method is applied to the low dew point zero crossing depth intelligent cleaning dehumidifier unit in any one of claims 1 to 6, and comprises the following steps:
acquiring environmental information;
according to the environmental information, the control module drives the precooling system, the recooling system and at least two cryogenic systems to operate;
acquiring operation information;
according to the environment information and the operation information, the control module controls at least two cryogenic systems to operate in a defrosting operation state in a staggered mode at intervals;
the environment information comprises fresh air dew point, air supply temperature of second cold air and air outlet temperature of the cryogenic system, and the operation information comprises return air pressure value of the cryogenic system in a defrosting operation state.
8. The method for controlling a low dew point super zero depth intelligent cleaning dehumidifier unit according to claim 7, wherein the controlling module drives the pre-cooling system, the sub-cooling system and the at least two cryogenic systems to operate specifically comprises:
when the fresh air dew point is larger than the set dew point value, the unit enters a dehumidification mode;
the control module opens a fresh air valve and a defrosting air valve, and adjusts the water inflow of external chilled water, and the pre-cooling system pre-cools fresh air by using the external chilled water to obtain first cold air;
the control module controls the sub-cooling system to cool the first cold air according to the set first cooling temperature to obtain the second cold air, and performs condensation heat recovery on the third cold air according to the air supply temperature;
and the control module controls the primary operation of the at least two cryogenic systems according to the set second cooling temperature.
9. The method for controlling a low dew point zero crossing depth intelligent cleaning dehumidifier unit according to claim 8, wherein the controlling at least two cryogenic systems to operate in a defrosting operation state interval overlapping specifically comprises:
acquiring a first operation time, and when the first operation time meets the set dehumidification time, taking one of the cryogenic systems as a defrosting system to enter a defrosting operation state;
The control module adjusts the opening of a defrosting air valve corresponding to the defrosting system according to the set closing rate, adjusts the indoor compressors in the defrosting system to a set first frequency according to the air supply dew point, and increases the operating frequency of the indoor compressors of the other cryogenic systems.
10. The method for controlling a low dew point zero crossing depth intelligent cleaning dehumidifier unit according to claim 9, wherein the controlling at least two cryogenic systems to operate in a defrosting operation state interval overlapping mode specifically further comprises:
when the air outlet temperature of the defrosting system reaches a set temperature value, the control module closes a defrosting air valve corresponding to the defrosting system, opens a defrosting valve in the defrosting system, and increases the indoor compressor in the defrosting system to a set second frequency;
when the return air pressure value reaches the set pressure value and maintains the first time period, the control module controls the defrosting system to exit the defrosting operation state so as to close a defrosting valve in the defrosting system, open a defrosting air valve corresponding to the defrosting system and regulate and control an indoor compressor in the defrosting system;
and the control module controls the primary operation of the other cryogenic systems and the defrosting system, acquires the first operation time again, and selects the defrosting system from the other cryogenic systems.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311863069.2A CN117803997A (en) | 2023-12-29 | 2023-12-29 | Dehumidifier unit with low dew point exceeding zero depth intelligent cleaning and control method |
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| CN202311863069.2A CN117803997A (en) | 2023-12-29 | 2023-12-29 | Dehumidifier unit with low dew point exceeding zero depth intelligent cleaning and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118149470A (en) * | 2024-05-10 | 2024-06-07 | 集美大学 | Self-cascade heat pump type high-temperature unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118149470A (en) * | 2024-05-10 | 2024-06-07 | 集美大学 | Self-cascade heat pump type high-temperature unit |
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