CN112833579A - A multi-mode heat pump flue-cured tobacco system and its control method - Google Patents

A multi-mode heat pump flue-cured tobacco system and its control method Download PDF

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CN112833579A
CN112833579A CN202110093388.4A CN202110093388A CN112833579A CN 112833579 A CN112833579 A CN 112833579A CN 202110093388 A CN202110093388 A CN 202110093388A CN 112833579 A CN112833579 A CN 112833579A
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heat exchanger
fan
variable frequency
speed
dehumidification
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CN112833579B (en
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陈佳恒
苏帆
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Zhengzhou University
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    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/10—Roasting or cooling tobacco
    • 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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • 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
    • F25B49/022—Compressor control arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

本发明公开了一种多模式热泵烤烟系统及其控制方法，包括控制器和与控制器相连的变频压缩机、四通换向阀、室外换热器、换热风箱；换热风箱进口处设有可调式风门，出口处设有变频风机；变频压缩机连接四通换向阀，四通换向阀连接室外换热器以及第二室内换热器；室外换热器、第一室内换热器、第二室内换热器通过单向阀、电子膨胀阀连接在一起。热泵通过调节压缩机转速、四通换向阀方向、电子膨胀阀开度控制制冷剂的流向和流量，通过调节风门的开度来控制风量的分配，从而实现系统多种工作模式的切换，达到对烤房内温湿度精准控制的目的，既能有效地回收回风热量，降低烤烟能耗，又能达到烤烟的工艺要求，实现高效除湿，精确控制烤房温湿度的目的。The invention discloses a multi-mode heat pump flue-cured tobacco system and a control method thereof, comprising a controller, a frequency conversion compressor connected with the controller, a four-way reversing valve, an outdoor heat exchanger and a heat exchange air box; There is an adjustable damper, and a variable frequency fan is installed at the outlet; the variable frequency compressor is connected to a four-way reversing valve, and the four-way reversing valve is connected to the outdoor heat exchanger and the second indoor heat exchanger; the outdoor heat exchanger and the first indoor heat exchange The heat exchanger and the second indoor heat exchanger are connected together through a one-way valve and an electronic expansion valve. The heat pump controls the flow direction and flow of the refrigerant by adjusting the speed of the compressor, the direction of the four-way reversing valve, and the opening of the electronic expansion valve, and controls the distribution of the air volume by adjusting the opening of the damper, so as to realize the switching of various working modes of the system to achieve The purpose of precise control of temperature and humidity in the barn can not only effectively recover the heat of the return air, reduce the energy consumption of flue-cured tobacco, but also meet the technological requirements of flue-cured tobacco, achieve efficient dehumidification, and accurately control the temperature and humidity of the barn.

Description

Multi-mode heat pump tobacco curing system and control method thereof
Technical Field
The invention belongs to the technical field of heat pump flue-cured tobacco, and particularly relates to a multi-mode heat pump flue-cured tobacco system and a control method thereof.
Background
The heat pump drying system has the advantages of high dehumidification speed, high efficiency and low energy consumption, can greatly reduce drying energy consumption, reduce pollutant and greenhouse gas emission, can improve the baking quality of products, is widely applied to the field of tobacco drying, and obtains good social and economic benefits. The heat pump flue-cured tobacco system can be divided into an open system, a closed system and a semi-open system according to the air circulation form.
The open system can only utilize the air once, the fresh air sucked from the environment is directly sent into the tobacco flue-curing house after being heated by the condenser, and is directly discharged into the environment after being subjected to heat exchange and humidity exchange operation with the tobacco leaves. The air that the closed system then planted the baking house is cyclic utilization in totally enclosed circulating channel, exhaust high temperature and high humidity air is after by evaporimeter dehumidification processing in the baking tobacco house, send back again in the baking tobacco house with the tobacco leaf heat transfer moisture transfer operation after heating by the condenser again, the new trend is not introduced from external environment to the closed system, also to emission waste gas in the external environment, there is not new trend heat load, so the energy consumption is minimum, but this system is because the continuous input of compressor power, the baking house temperature can constantly rise, be unfavorable for the accurate control of baking house internal temperature. The half-open system mixes the exhaust return air in the partial tobacco flue-curing house with the new trend of introducing from the external world, sends into indoorly after the condenser heating again, and the partial heat in the recoverable return air of half-open system is more energy-conserving in open system relatively, can effectively realize the temperature control in the baking house in comparison with closed system, but moisture content in the return air is great, has increased the moisture content in the air mixture, can reduce the dehumidification efficiency in the system.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a heat pump tobacco curing system with multiple working modes and a control method thereof, the flow direction and the flow of a refrigerant are effectively controlled by controlling the rotating speed of a compressor, the direction of a four-way reversing valve and the opening degree of an electronic expansion valve, the switching of the multiple working modes is realized, the aim of accurately controlling the temperature and the humidity in a curing barn is fulfilled, the return air heat is more effectively recovered, the energy consumption of cured tobacco is reduced, and the technological requirements of cured tobacco are met.
In order to achieve the purpose, the invention adopts the technical scheme that:
a multi-mode heat pump tobacco curing system comprises a controller, a variable frequency compressor, a four-way reversing valve, an outdoor heat exchanger, an indoor heat exchanger and a sensor group, wherein the variable frequency compressor, the four-way reversing valve and the outdoor heat exchanger are connected with the controller; an adjustable air door is arranged at the inlet of the heat exchange air box, and a variable frequency fan is arranged at the outlet of the heat exchange air box.
A first air cavity and a second air cavity are independently arranged in the heat exchange air box in a split mode, and inlets and outlets of the first air cavity and the second air cavity are communicated together; the indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger which are respectively and correspondingly arranged in the first air cavity and the second air cavity.
Furthermore, the outlet of the variable frequency compressor is connected with the first connecting port of the four-way reversing valve, the second connecting port of the four-way reversing valve is connected with one end of the outdoor heat exchanger, the third connecting port is communicated with the inlet of the variable frequency compressor, and the fourth connecting port is connected with one end of the second indoor heat exchanger; the other end of the outdoor heat exchanger is respectively connected with one end of the first indoor heat exchanger and the inlet of the first one-way valve, the outlet of the first one-way valve is respectively connected with one end of the electronic expansion valve and the inlet of the second one-way valve, the outlet of the second one-way valve is connected with the other end of the first indoor heat exchanger, and the other end of the electronic expansion valve is connected with the other end of the second indoor heat exchanger; the sensor group comprises a first temperature and humidity sensor arranged at the outlet of the heat exchange air box, a second temperature and humidity sensor arranged at the inlet of the heat exchange air box, a third temperature and humidity sensor in the environment of the curing barn and a temperature and pressure sensor arranged on a pipeline connected with the air inlet of the variable frequency compressor, and data signals collected by the sensor group are transmitted to the controller; and the controller controls the variable-frequency compressor, the variable-frequency fan, the electronic expansion valve and the adjustable air door according to the actual working condition.
Based on the multi-mode heat pump tobacco curing system, the invention also provides a control method of the system, which comprises the following concrete implementation steps:
1) according to different process requirements of flue-cured tobacco, after the multi-mode heat pump flue-cured tobacco system is started, the target temperature t of indoor air of the flue-cured tobacco is set through the controller0And target relative humidity
Figure BDA0002911876540000031
Setting the maximum upward deviation value delta t of the target temperatureuAnd maximum downward deviation value of Δ td，ΔtuAnd Δ tdIn the range of 1-10 ℃; the maximum upward deviation value of the target relative humidity is
Figure BDA0002911876540000032
In the range of 0-20%;
2) the controller is used for setting the upper limit value dt of indoor temperature rise or temperature drop rate of the flue-cured tobacco under different working modesuAnd a lower limit value dtd，dtuAnd dtdIn the range of 0.1-5 ℃ per minute, and an upper limit value of the dehumidification rate
Figure BDA0002911876540000033
And lower limit value
Figure BDA0002911876540000034
And
Figure BDA0002911876540000035
in the range of 0.1% -5% per minute; meanwhile, timing the starting time of the system, wherein the accumulated working time is tau;
3) third sensor detects current air temperature t in flue-cured tobacco room in real time in unit working process1And relative humidity
Figure BDA0002911876540000036
The difference value between the current air temperature and the target temperature in the flue-cured tobacco chamber and the difference value between the current air humidity and the target humidity are judged by the controller, the flow direction and the flow rate of the refrigerant are controlled by the controller by adjusting the rotating speed of the compressor, the direction of the four-way reversing valve and the opening of the electronic expansion valve, the distribution of the air volume is controlled by adjusting the opening of the air door,thereby realize the switching of the multiple mode of system, reach the purpose to humidity accurate control in the roast room, the rational distribution of possible energy is avoided extravagant in the temperature and the heat needs of the matching material in different drying stages that can be better.
4) During the operation period of the heat pump tobacco curing system, comparing the accumulated working time tau with the preset detection time interval tau of the systemsSize, τsThe range is 1-10 min; if tausIf the value is more than tau, the system keeps the current working mode unchanged; if tausAnd (4) zero clearing is carried out on tau if tau is less than or equal to tau, and the system returns to the step 3) to continuously judge and adjust the working state.
In step 3), according to the judgment result of the controller, the system selects and executes a corresponding heating mode, a heating dehumidification mode, a dehumidification mode or a temperature regulation dehumidification mode, specifically:
31) if t1-t0＜-ΔtdAnd is
Figure BDA0002911876540000041
The system executes a heating mode, the controller calculates the actual temperature rise rate dt in the flue-cured tobacco chamber, and the actual temperature rise rate dt and the target temperature rise rate upper limit value dtuLower limit value dtdComparing, and performing system regulation and control according to a comparison result;
32) if t1-t0＜-ΔtdAnd is
Figure BDA0002911876540000042
The system executes a heating and dehumidifying mode, and the controller calculates the actual dehumidifying rate in the flue-cured tobacco chamber
Figure BDA0002911876540000043
And comparing the actual dehumidification rates
Figure BDA0002911876540000044
And the target upper limit value of dehumidification rate
Figure BDA0002911876540000045
Lower limit value
Figure BDA0002911876540000046
Calculating the actual temperature rise rate dt in the tobacco curing chamber, and comparing the actual temperature rise rate dt with the target temperature rise rate upper limit value dtuLower limit value dtdPerforming system regulation and control according to the comparison result;
33) if- Δ td≤t1-t0≤ΔtuAnd is
Figure BDA0002911876540000047
The system executes a dehumidification mode, and the controller calculates the evaporation temperature t according to the refrigerant pressure collected by the temperature and pressure sensoreComparison of the evaporating temperature teAnd a preset minimum evaporation temperature tsCalculating the actual dehumidification rate in the flue-cured tobacco chamber
Figure BDA0002911876540000048
And comparing the actual dehumidification rates
Figure BDA0002911876540000049
And the target upper limit value of dehumidification rate
Figure BDA00029118765400000410
Lower limit value
Figure BDA00029118765400000411
Performing system regulation and control according to the comparison result;
34) if t1-t0＞-ΔtdAnd is
Figure BDA0002911876540000051
The controller controls the frequency conversion compressor to shut down and closes the outdoor heat exchanger fan, the electronic expansion valve and the frequency conversion fan;
35) if t1-t0＞ΔtuAnd is
Figure BDA0002911876540000052
The system executes a temperature-adjusting dehumidification mode, and the controller calculates the actual dehumidification rate in the tobacco-curing chamber
Figure BDA0002911876540000053
And comparing the actual dehumidification rates
Figure BDA0002911876540000054
And the target upper limit value of dehumidification rate
Figure BDA0002911876540000055
Lower limit value
Figure BDA0002911876540000056
Calculating the actual temperature drop rate dt in the flue-cured tobacco chamber, and comparing the actual temperature drop rate dt with the target temperature drop rate upper limit value dtuLower limit value dtdAnd carrying out system regulation and control according to the comparison result.
Wherein the actual temperature rise or temperature drop rate dt is per regulation period tausThe average value of the internal temperature rise or the temperature drop rate is calculated according to the following formula:
Figure BDA0002911876540000057
wherein q is the mass flow of air flowing through the heat exchange air box and the unit is m3/s；tioThe temperature difference of the inlet and the outlet of the heat exchange air box is measured in units of temperature; vdryIs the air volume in the flue-cured tobacco chamber, and the unit is m3；
The actual dehumidification rate
Figure BDA00029118765400000510
For each regulation period tausThe average value of the inner dehumidification rate is calculated by the following formula:
Figure BDA0002911876540000058
wherein
Figure BDA0002911876540000059
Is relatively arranged at the inlet and the outlet of the heat exchange air boxThe moisture content difference.
Wherein, in the step 31), the upper limit value dt of the target temperature rise rate is compared according to the actual temperature rise rate dtuLower limit value dtdAs a result, the controller specifically regulates the system as follows:
if dt > dtuReducing the rotating speed of the variable frequency compressor, and adjusting the rotating speed of the fan of the outdoor heat exchanger, the opening degree of the electronic expansion valve and the rotating speed of the variable frequency fan to adapt to the change of the rotating speed of the variable frequency compressor;
if dt < dtdIncreasing the rotating speed of the variable frequency compressor, and simultaneously adjusting the rotating speed of the fan of the outdoor heat exchanger, the opening degree of the electronic expansion valve and the rotating speed of the variable frequency fan to adapt to the change of the rotating speed of the variable frequency compressor;
if dtu≥dt≥dtdThe system operating parameters are not adjusted.
Wherein, the step 32) is based on the actual dehumidification rate
Figure BDA0002911876540000061
Comparing the upper limit of the target dehumidification rate
Figure BDA0002911876540000062
Lower limit value
Figure BDA0002911876540000063
As a result, the controller specifically regulates the system as follows:
if it is
Figure BDA0002911876540000064
The opening degree of the adjustable air door is reduced; if it is
Figure BDA0002911876540000065
Increasing the opening degree of the adjustable air door;
if it is
Figure BDA0002911876540000066
The opening degree of the adjustable air door is not changed; then, the controller compares the upper limit value dt of the target temperature rise rate according to the actual temperature rise rate dtuLower limit value dtdAs a result, the controller regulates and controls the system, specifically:
if dt > dtuReducing the rotating speed of the variable frequency compressor, and simultaneously adjusting the air speed of the outdoor heat exchanger fan, the opening of the electronic expansion valve and the air speed of the variable frequency fan to adapt to the change of the rotating speed of the compressor; if dt < dtdIncreasing the rotating speed of the variable frequency compressor, and simultaneously adjusting the air speed of the outdoor heat exchanger fan, the opening of the electronic expansion valve and the air speed of the variable frequency fan to adapt to the change of the rotating speed of the variable frequency compressor; if dtu≥dt≥dtdThe system operating parameters are not adjusted.
Wherein, the evaporation temperature t is calculated according to the step 33)eAnd a preset minimum evaporation temperature tsThe controller specifically regulates and controls the system according to the comparison result of (1):
if te＜tsImmediately reducing the rotating speed of the variable frequency compressor, and simultaneously adjusting the fan speed of the outdoor heat exchanger, the opening of the electronic expansion valve and the fan speed to adapt to the change of the rotating speed of the compressor;
if te≥tsIf so, no adjustment is performed; the controller then bases the actual dehumidification rate
Figure BDA0002911876540000071
Comparing the upper limit of the target dehumidification rate
Figure BDA0002911876540000072
Lower limit value
Figure BDA0002911876540000073
As a result, the controller regulates and controls the system, specifically:
if it is
Figure BDA0002911876540000074
The opening of the adjustable air door and the rotating speed of the variable frequency compressor are reduced, and the wind speed of the outdoor heat exchanger fan, the opening of the electronic expansion valve and the wind speed of the variable frequency fan are adjusted to adapt to the change of the rotating speed of the variable frequency compressor; if it is
Figure BDA0002911876540000075
Increasing the opening of the adjustable air door and the rotating speed of the variable frequency compressor, and simultaneously adjusting the wind speed of the outdoor heat exchanger fan, the opening of the electronic expansion valve and the wind speed of the variable frequency fan to adapt to the change of the rotating speed of the variable frequency compressor; if it is
Figure BDA0002911876540000076
The opening degree of the adjustable air door and the rotating speed of the variable-frequency compressor are not changed.
Wherein, the step 35) is based on the actual dehumidification rate
Figure BDA0002911876540000077
Comparing the upper limit of the target dehumidification rate
Figure BDA0002911876540000078
Lower limit value
Figure BDA0002911876540000079
As a result, the controller specifically regulates the system as follows:
if it is
Figure BDA00029118765400000710
Reducing the rotating speed of the variable frequency fan; if it is
Figure BDA00029118765400000711
Increasing the rotating speed of the variable frequency fan;
if it is
Figure BDA00029118765400000712
Then not adjusting; then, the controller compares the upper limit value dt of the target temperature rise rate according to the actual temperature rise rate dtuLower limit value dtdAs a result, the controller regulates and controls the system, specifically:
if dt > dtuReducing the rotating speed of the variable frequency compressor, and simultaneously adjusting the wind speed of the outdoor heat exchanger fan, the opening of the electronic expansion valve and the wind speed of the variable frequency fan to adapt to the change of the rotating speed of the variable frequency compressor; if dt < dtdIncreasing the rotating speed of the variable frequency compressor, and simultaneously adjusting the wind speed of the outdoor heat exchanger fan, the opening of the electronic expansion valve and the wind speed of the variable frequency fan to adapt to the variable frequency compressorThe rotation speed is changed; if dtu≥dt≥dtdThe system operating parameters are not adjusted.
The invention has the following beneficial effects:
aiming at the defects that an open system is low in energy utilization rate and high in energy consumption, a closed system cannot effectively control the temperature of a curing barn and a semi-open system is low in dehumidification efficiency in the conventional heat pump tobacco curing system, the multi-mode heat pump tobacco curing system provided by the invention absorbs the advantages of the three systems, discards the defects of the three systems, has multiple working modes, can effectively recover return air heat, reduces the energy consumption of tobacco curing, can meet the technological requirements of tobacco curing, can realize efficient dehumidification and can accurately control the temperature of the curing barn.
Drawings
FIG. 1 is a schematic structural diagram of a multi-mode heat pump tobacco curing system according to the present invention;
FIG. 2 is a logic diagram of the control method of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in figure 1, the tobacco curing system with the multi-mode heat pump comprises a controller 305, a variable frequency compressor 101 connected with the controller 305, a four-way reversing valve 102, an outdoor heat exchanger 103, an indoor heat exchanger arranged inside a heat exchange air box 201, a sensor group and the like.
The heat exchange air box 201 comprises two independent air cavities, the middle of the air cavity is completely separated, the inside of the air cavity is independently divided into a first air cavity 204 and a second air cavity 205, and inlets and outlets of the two air cavities are communicated together. An adjustable air door 202 is arranged at the inlet of the heat exchange air box, and a variable frequency fan 203 is arranged at the outlet of the heat exchange air box; the indoor heat exchanger comprises a first indoor heat exchanger 106 and a second indoor heat exchanger 107 which are respectively and correspondingly arranged in a first air cavity 204 and a second air cavity 205; the outlet of the variable frequency compressor 101 is connected with a first connecting port 102-1 of a four-way reversing valve 102, a second connecting port 102-2 of the four-way reversing valve 102 is connected with one end of an outdoor heat exchanger 103, a third connecting port 102-3 is communicated with the inlet of the variable frequency compressor 101, and a fourth connecting port 102-4 is connected with one end of a second indoor heat exchanger 107; the other end of the outdoor heat exchanger 103 is respectively connected with one end of a first indoor heat exchanger 106 and an inlet of a first check valve 104, an outlet of the first check valve 104 is respectively connected with one end of an electronic expansion valve 108 and an inlet of a second check valve 105, an outlet of the second check valve 105 is connected with the other end of the first indoor heat exchanger 106, and the other end of the electronic expansion valve 108 is connected with the other end of a second indoor heat exchanger 107;
the sensor group comprises a first temperature and humidity sensor 301, a second temperature and humidity sensor 302, a third temperature and humidity sensor 303 and a temperature and pressure sensor 304. Wherein, the first temperature and humidity sensor 301 is arranged at the outlet of the heat exchange air box, the second temperature and humidity sensor 302 is arranged at the inlet of the heat exchange air box, the third temperature and humidity sensor 303 is arranged outside the heat exchange air box 201 and in the indoor environment of the baking room, and the temperature and pressure sensor 304 is arranged on a pipeline connected with the air inlet of the variable frequency compressor 101;
in order to achieve the effect of multi-mode constant-temperature dehumidification of flue-cured tobacco, the multi-mode heat pump flue-cured tobacco system of the embodiment can realize the switching of the working modes by the different conduction modes inside the four connectors of the four-way reversing valve 102 driven by the input signal of the controller 305, that is, the switching of the first working state and the second working state is realized.
The first working state: the first connection port 102-1 of the four-way reversing valve 102 is communicated with the inside of the second connection port 102-2, and the third connection port 102-3 is communicated with the inside of the fourth connection port 102-4;
the second working state: the first connection port 102-1 of the four-way selector valve 102 is connected to the fourth connection port 102-4, and the second connection port 102-2 is connected to the third connection port 102-3.
Correspondingly, the embodiment also provides a control method of the multi-mode heat pump tobacco curing system, according to the tobacco curing process requirement, the tobacco curing heat pump system has four working modes of a heating mode, a heating dehumidification mode, a temperature adjustment dehumidification mode and a dehumidification mode, the multi-mode heat pump tobacco curing system can effectively control the flow direction and the flow rate of a refrigerant by adjusting the rotating speed of the compressor 101, switching the working state of the four-way reversing valve 102 and adjusting the opening degree of the electronic expansion valve 108, and effectively control the distribution of air volume by controlling the opening degree of the adjustable air door 202, so that the switching of multiple working modes of the system is realized.
Wherein the heating mode is as follows: the variable frequency compressor 101 is started, the four-way reversing valve 102 is switched to a second working state, the electronic expansion valve 108 is started, the fan of the outdoor heat exchanger 103 is started, the adjustable air door 202 closes the inlet of the first air cavity 204, the inlet of the second air cavity 205 is completely opened, and the variable frequency fan 203 is started;
a heating and dehumidifying mode: the variable frequency compressor 101 is started, the four-way reversing valve 102 is switched to a second working state, the electronic expansion valve 108 is started, the fan of the outdoor heat exchanger 103 is started, the adjustable air door 202 simultaneously opens the inlet of the first air cavity 204 and the inlet of the second air cavity 205, and the variable frequency fan 203 is started;
temperature adjustment and dehumidification mode: the variable frequency compressor 101 is started, the four-way reversing valve 102 is switched to a first working state, the electronic expansion valve 108 is started, the fan of the outdoor heat exchanger 103 is started, the adjustable air door 202 closes the inlet of the first air cavity 204, and the variable frequency fan 203 is started;
a dehumidification mode: the variable frequency compressor 101 is started, the four-way reversing valve 102 is switched to the second working state, the electronic expansion valve 108 is started, the fan of the outdoor heat exchanger 103 is closed, the adjustable air door 202 closes the inlet of the first air cavity 204, the inlet of the second air cavity 205 is completely opened, and the variable frequency fan 203 is started.
Correspondingly, based on the multi-mode heat pump tobacco curing system, the invention also provides a control method of the tobacco curing system; as shown in fig. 2, the specific steps are as follows:
1) according to different process requirements of flue-cured tobacco, after the multi-mode heat pump flue-cured tobacco system is started, the indoor air target temperature t of the flue-cured tobacco is set through the controller 3050And target relative humidity
Figure BDA0002911876540000117
Setting the maximum upward deviation value delta t of the target temperatureuAnd a maximum downward deviation value Δ td，ΔtuAnd Δ tdIn the range of 1-10 deg.C, the maximum upward deviation value of the target relative humidity
Figure BDA0002911876540000111
In the range of 0-20%;
2) root of herbaceous plantAccording to different process requirements of the flue-cured tobacco, the controller 305 sets the upper limit value dt of the indoor temperature rise/temperature drop rate of the flue-cured tobacco in different working modesuAnd a lower limit value dtd，dtuAnd dtdIn the range of 0.1-5 ℃ per minute, the upper limit of the dehumidification rate
Figure BDA0002911876540000112
And lower limit value
Figure BDA0002911876540000113
And
Figure BDA0002911876540000114
the range of (1) is 0.1-5% per minute, and the system starting time is timed, and the accumulated working time is tau;
3) detecting the current air temperature t of the tobacco curing chamber according to the third sensor 303 in the tobacco curing process1And relative humidity
Figure BDA0002911876540000115
And transmits to the controller 305, the controller 305 compares the related data, and the system can select to execute a heating mode, a heating dehumidification mode, a dehumidification mode, and a temperature adjustment dehumidification mode, specifically:
31) if t1-t0＜-ΔtdAnd is
Figure BDA0002911876540000116
The system executes a heating mode, the controller 305 calculates an actual temperature rise rate dt in the flue-cured tobacco chamber, and compares the actual temperature rise rate dt with a target temperature rise rate upper limit value dtuLower limit value dtdComparing, and adjusting the working states of the outdoor heat exchanger 103, the electronic expansion valve 108, the variable frequency fan 203 and the variable frequency compressor 101 according to the comparison result to realize system heating and temperature rise; the method specifically comprises the following steps:
31-1) if dt > dtuIf so, the rotating speed of the variable frequency compressor 101 is reduced, and the rotating speed of the fan of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the rotating speed of the variable frequency fan 203 are adjusted to adapt to the change of the rotating speed of the variable frequency compressor 101;
31-2) if dt < dtdIncreasing the rotating speed of the variable frequency compressor 101, and adjusting the rotating speed of the fan of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the rotating speed of the variable frequency fan 203 to adapt to the change of the rotating speed of the variable frequency compressor 101;
31-3) if dtu≥dt≥dtdThe system operating parameters are not adjusted.
32) If t1-t0＜-ΔtdAnd is
Figure BDA0002911876540000121
The system executes a warm-up dehumidification mode and the controller 305 calculates the actual dehumidification rate in the flue-cured tobacco chamber
Figure BDA0002911876540000122
And comparing the actual dehumidification rates
Figure BDA0002911876540000123
And the target upper limit value of dehumidification rate
Figure BDA0002911876540000124
Lower limit value
Figure BDA0002911876540000125
Adjusting the working states of the outdoor heat exchanger 103, the electronic expansion valve 108, the variable frequency fan 203 and the variable frequency compressor 101 according to the comparison result to realize system heating and temperature rise and return air dehumidification; the method specifically comprises the following steps:
32-1) if
Figure BDA0002911876540000126
The opening of the adjustable damper 202 is decreased;
32-2) if
Figure BDA0002911876540000127
The opening degree of the adjustable air door 202 is increased;
32-3) if
Figure BDA0002911876540000128
The opening degree of the adjustable air door 202 is not changed;
then, the controller 305 compares the actual temperature rise rate dt in the flue-cured tobacco chamber with the upper limit value dt of the target temperature rise rate according to the calculationuLower limit value dtdThe result of (2) regulating and controlling the system specifically comprises the following steps:
if dt > dtuIf so, reducing the rotating speed of the variable frequency compressor 101, and simultaneously adjusting the wind speed of the fan of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the wind speed of the variable frequency fan 203 to adapt to the change of the rotating speed of the compressor 101; if dt < dtdIncreasing the rotating speed of the variable frequency compressor 101, and simultaneously adjusting the wind speed of the fan of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the wind speed of the variable frequency fan 203 to adapt to the change of the rotating speed of the variable frequency compressor 101; if dtu≥dt≥dtdThe system operating parameters are not adjusted.
33) If- Δ td≤t1-t0≤ΔtuAnd is
Figure BDA0002911876540000129
The system performs a dehumidification mode, and the controller 305 calculates an evaporation temperature t according to the refrigerant pressure collected by the temperature and pressure sensor 304eAnd with a predetermined minimum evaporation temperature tsComparing, and adjusting the working states of the adjustable air door 202, the variable frequency compressor 101, the outdoor heat exchanger 103, the electronic expansion valve 108 and the variable frequency fan 203 according to the result to realize return air dehumidification; the method specifically comprises the following steps:
33-1) if te＜tsIf so, immediately reducing the rotating speed of the variable frequency compressor 101, and simultaneously adjusting the fan speed of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the wind speed of the variable frequency fan 203 to adapt to the change of the rotating speed of the compressor 101;
33-2) if te≥tsCalculating the actual dehumidification rate in the flue-cured tobacco chamber
Figure BDA0002911876540000131
Comparison of actual dehumidification rates
Figure BDA0002911876540000132
And the target upper limit value of dehumidification rate
Figure BDA0002911876540000133
And lower limit value
Figure BDA0002911876540000134
The method specifically comprises the following steps:
if it is
Figure BDA0002911876540000135
The opening degree of the adjustable air door 202 and the rotating speed of the variable-frequency compressor 101 are reduced, and the fan speed of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the wind speed of the variable-frequency fan 203 are adjusted to adapt to the change of the rotating speed of the variable-frequency compressor 101; if it is
Figure BDA0002911876540000136
Increasing the opening degree of the adjustable air door 202 and the rotating speed of the variable-frequency compressor 101, and simultaneously adjusting the fan speed of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the wind speed of the variable-frequency fan 203 to adapt to the change of the rotating speed of the variable-frequency compressor 101; if it is
Figure BDA0002911876540000137
The opening degree of the adjustable damper 202 and the rotating speed of the inverter compressor 101 are not changed.
34) If t1-t0＞-ΔtdAnd is
Figure BDA0002911876540000138
The controller 305 controls the inverter compressor 101 to shut down and closes the outdoor heat exchanger 103 fan, the electronic expansion valve 108 and the inverter fan 203;
35) if t1-t0＞ΔtuAnd is
Figure BDA0002911876540000139
The system executes a temperature-adjusting dehumidification mode, and the controller 305 calculates the actual dehumidification rate in the flue-cured tobacco chamber
Figure BDA00029118765400001310
And comparing the actual dehumidification rates
Figure BDA00029118765400001311
And the target upper limit value of dehumidification rate
Figure BDA00029118765400001312
Lower limit value
Figure BDA00029118765400001313
Adjusting the working states of the outdoor heat exchanger 103, the electronic expansion valve 108, the variable frequency fan 203 and the variable frequency compressor 101 according to the comparison result; the method specifically comprises the following steps:
35-1) if
Figure BDA00029118765400001314
Reducing the rotating speed of the variable frequency fan 203;
35-2) if
Figure BDA0002911876540000141
Increasing the rotating speed of the variable frequency fan 203;
35-3) if
Figure BDA0002911876540000142
Then not adjusting; the controller 305 calculates the actual temperature rise rate dt in the flue-cured tobacco chamber, and compares the actual temperature rise rate dt with the upper limit value dt of the target temperature rise rateuAnd a lower limit value dtdThe method specifically comprises the following steps:
if dt > dtuIf so, reducing the rotating speed of the variable frequency compressor 101, and simultaneously adjusting the fan speed of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the wind speed of the variable frequency fan 203 to adapt to the change of the rotating speed of the variable frequency compressor 101; if dt < dtdIncreasing the rotating speed of the variable frequency compressor 101, and simultaneously adjusting the fan speed of the outdoor heat exchanger 103, the opening degree of the electronic expansion valve 108 and the wind speed of the variable frequency fan 203 to adapt to the change of the rotating speed of the variable frequency compressor 101; if dtu≥dt≥dtdThe system operating parameters are not adjusted.
4) During the operation of the heat pump tobacco curing system, the controller 305 detects the time interval τ according to the actual accumulated working time τ and the preset system detection time interval τsComparison of the sizes, τsThe range is 1-10 min; if tausIf tau is greater, the system keeps the current working modeThe change is not changed; if tausAnd (4) zero clearing is carried out on tau if tau is less than or equal to tau, and the system returns to the last state to continuously judge and adjust the working state.
Wherein the actual rate of temperature rise dt is per regulation period tausThe average value of the internal temperature rise rate is calculated according to the following formula:
Figure BDA0002911876540000143
in the formula, q is the mass flow of air flowing through the heat exchange bellows 201 and is expressed in m3/s；tioThe temperature difference between the inlet and the outlet of the heat exchange air box 201 is measured in units of ℃; vdryIs the air volume in the flue-cured tobacco chamber, and the unit is m3；
Actual rate of dehumidification
Figure BDA0002911876540000144
For each regulation period tausThe average value of the inner dehumidification rate is calculated by the following formula:
Figure BDA0002911876540000151
in the formula
Figure BDA0002911876540000152
Is the difference value of the relative moisture content of the inlet and the outlet of the heat exchange wind box 201.
The opening of the adjustable air door at the inlet of the heat exchange air box is adjusted to be larger, so that the inlet of the first air cavity is enlarged, and the inlet of the second air cavity is reduced; the opening degree of the adjustable air door is reduced, so that the inlet of the second air cavity is enlarged, and the inlet of the first air cavity is reduced.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1.一种多模式热泵烤烟系统，包括控制器和与控制器相连的变频压缩机、四通换向阀、室外换热器、设在换热风箱内部的室内换热器、传感器组；所述换热风箱的进口处设有可调式风门，出口处设有变频风机；所述换热风箱内部通过独立分割设有第一风腔和第二风腔，所述第一风腔和第二风腔的进口和出口均连通在一起；所述室内换热器包括分别对应设在第一风腔和第二风腔内的第一室内换热器和第二室内换热器；所述室外换热器的一端和变频压缩机连接在四通换向阀上，室外换热器的另一端连接第一室内换热器和第二室内换热器；所述传感器组包括设在换热风箱出口的第一温湿传感器、换热风箱进口的第二温湿传感器、烤房室内的第三温湿传感器以及设在与变频压缩机的进气口相连管道上的温度压力传感器，传感器组采集的数据信号传递至控制器；控制器根据实际工况对变频压缩机、变频风机、电子膨胀阀和可调风门进行控制。1. A multi-mode heat pump flue-cured tobacco system, comprising a controller, a variable frequency compressor connected to the controller, a four-way reversing valve, an outdoor heat exchanger, an indoor heat exchanger and a sensor group arranged inside the heat exchange air box; The inlet of the heat exchange air box is provided with an adjustable damper, and the outlet is provided with a variable frequency fan; the interior of the heat exchange air box is independently divided with a first air cavity and a second air cavity, and the first air cavity and the second air cavity are independently divided. The inlet and the outlet of the air cavity are connected together; the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger respectively arranged in the first air cavity and the second air cavity; the outdoor heat exchanger One end of the heat exchanger and the inverter compressor are connected to the four-way reversing valve, and the other end of the outdoor heat exchanger is connected to the first indoor heat exchanger and the second indoor heat exchanger; the sensor group includes a set of sensors located in the heat exchange air box. The first temperature and humidity sensor at the outlet, the second temperature and humidity sensor at the inlet of the heat exchange air box, the third temperature and humidity sensor in the baking room, and the temperature and pressure sensor installed on the pipeline connected to the air inlet of the inverter compressor. The data signal is transmitted to the controller; the controller controls the inverter compressor, inverter fan, electronic expansion valve and adjustable damper according to the actual working conditions. 2.根据权利要求1所述的多模式热泵烤烟系统，其特征在于：所述变频压缩机的出口连接四通换向阀的第一连接口，四通换向阀的第二连接口连接室外换热器的一端，第三连接口连通变频压缩机的进口，第四连接口连接第二室内换热器的一端；所述室外换热器的另一端分别连接第一室内换热器的一端和第一单向阀的进口，第一单向阀的出口分别连接电子膨胀阀一端和第二单向阀的进口，第二单向阀的出口连接在第一室内换热器的另一端上，电子膨胀阀的另一端连接在第二室内换热器的另一端。2. The multi-mode heat pump flue-cured tobacco system according to claim 1, wherein the outlet of the variable frequency compressor is connected to the first connection port of the four-way reversing valve, and the second connection port of the four-way reversing valve is connected to the outdoor One end of the heat exchanger, the third connection port is connected to the inlet of the variable frequency compressor, the fourth connection port is connected to one end of the second indoor heat exchanger; the other end of the outdoor heat exchanger is respectively connected to one end of the first indoor heat exchanger and the inlet of the first check valve, the outlet of the first check valve is respectively connected to one end of the electronic expansion valve and the inlet of the second check valve, and the outlet of the second check valve is connected to the other end of the first indoor heat exchanger , the other end of the electronic expansion valve is connected to the other end of the second indoor heat exchanger. 3.根据权利要求2所述的多模式热泵烤烟系统，其特征在于：所述四通换向阀的四个连接口内部导通方式的不同实现第一工作状态和第二工作状态的切换；3. The multi-mode heat pump flue-cured tobacco system according to claim 2, characterized in that: the internal conduction modes of the four connection ports of the four-way reversing valve are different to realize the switching of the first working state and the second working state; 所述第一工作状态为：四通换向阀的第一接口与第二接口内部导通，第三接口与第四接口内部导通；The first working state is: the first interface of the four-way reversing valve is internally connected with the second interface, and the third interface and the fourth interface are internally connected; 所述第二工作状态为：四通换向阀的第一接口与第四接口内部导通，第二接口与第三接口内部导通；The second working state is: the first interface of the four-way reversing valve is internally connected to the fourth interface, and the second interface is internally connected to the third interface; 所述控制器的控制实现系统在升温模式、升温除湿模式、除湿模式、调温除湿模式的切换；具体为：The control of the controller realizes the switching of the system in the heating mode, the heating and dehumidification mode, the dehumidification mode, and the temperature adjustment and dehumidification mode; specifically: 执行所述升温模式时，系统的调控具体为：变频压缩机开启，四通换向阀切换至第二工作状态，电子膨胀阀开启，室外换热器风机开启，可调式风门关闭第一风腔的进口，完全开启第二风腔的进口，变频风机开启；When the heating mode is executed, the regulation of the system is as follows: the inverter compressor is turned on, the four-way reversing valve is switched to the second working state, the electronic expansion valve is turned on, the outdoor heat exchanger fan is turned on, and the adjustable damper closes the first air chamber The inlet of the second air chamber is fully opened, and the variable frequency fan is turned on; 执行所述升温除湿模式时，系统的调控具体为：变频压缩机开启，四通换向阀切换至第二工作状态，电子膨胀阀开启，室外换热器风机开启，可调式风门同时开启第一风腔的进口和第二风腔的进口，变频风机开启；When the temperature rise and dehumidification mode is executed, the regulation of the system is as follows: the inverter compressor is turned on, the four-way reversing valve is switched to the second working state, the electronic expansion valve is turned on, the outdoor heat exchanger fan is turned on, and the adjustable damper is simultaneously turned on to the first working state. The inlet of the air cavity and the inlet of the second air cavity, the variable frequency fan is turned on; 执行所述调温除湿模式时，系统的调控具体为：变频压缩机开启，四通换向阀切换至第一工作状态，电子膨胀阀开启，室外换热器风机开启，可调式风门关闭第一风腔的进口，变频风机开启；When the temperature regulation and dehumidification mode is executed, the regulation of the system is as follows: the inverter compressor is turned on, the four-way reversing valve is switched to the first working state, the electronic expansion valve is turned on, the outdoor heat exchanger fan is turned on, and the adjustable damper is closed. At the inlet of the air cavity, the variable frequency fan is turned on; 执行所述除湿模式时，系统的调控具体为：变频压缩机开启，四通换向阀切换至第二工作状态，电子膨胀阀开启，室外换热器风机关闭，可调式风门同时开启第一风腔的进口和第二风腔的进口，变频风机开启。When the dehumidification mode is executed, the regulation of the system is as follows: the inverter compressor is turned on, the four-way reversing valve is switched to the second working state, the electronic expansion valve is turned on, the outdoor heat exchanger fan is turned off, and the adjustable damper simultaneously opens the first air. The inlet of the cavity and the inlet of the second air cavity, the variable frequency fan is turned on. 4.基于权利要求3所述的多模式热泵烤烟系统实现的控制方法，其特征在于：所述控制方法的实现步骤如下：4. the control method realized based on the multi-mode heat pump flue-cured tobacco system of claim 3, is characterized in that: the realization step of described control method is as follows: 1)根据烤烟不同过程需求，多模式热泵烤烟系统开启之后，通过控制器设置烤烟室内空气的目标温度t0和目标相对湿度
Figure FDA0002911876530000031
设置目标温度最大向上偏差值Δtu和最大向下偏差值为Δtd，Δtu和Δtd的范围为1-10℃；目标相对湿度最大向上偏差值为
Figure FDA0002911876530000032
的范围为0-20％；1) According to different process requirements of flue-cured tobacco, after the multi-mode heat pump flue-cured tobacco system is turned on, the target temperature t 0 and target relative humidity of the indoor air of flue-cured tobacco are set by the controller.
Figure FDA0002911876530000031
Set the maximum upward deviation value Δt u and the maximum downward deviation value of the target temperature as Δt d , the range of Δt u and Δt d is 1-10℃; the maximum upward deviation value of the target relative humidity is
Figure FDA0002911876530000032
The range is 0-20%; 2)通过控制器设置不同工作模式下的烤烟室内温升或温降速率上限值dtu和下限值dtd，dtu和dtd的范围为每分钟0.1-5℃，以及除湿速率上限值
Figure FDA0002911876530000033
和下限值
Figure FDA0002911876530000034
和
Figure FDA0002911876530000035
的范围为每分钟0.1％-5％；同时对系统开启时间进行计时，累计工作时间为τ；2) Set the upper limit dt u and lower limit dt d of the indoor temperature rise or temperature drop rate of flue-cured tobacco under different working modes through the controller. The range of dt u and dt d is 0.1-5℃ per minute, and the dehumidification rate Limit
Figure FDA0002911876530000033
and lower limit
Figure FDA0002911876530000034
and
Figure FDA0002911876530000035
The range is 0.1%-5% per minute; at the same time, the system startup time is timed, and the cumulative working time is τ; 3)机组工作过程中第三传感器实时检测烤烟室内当前的空气温度t1和相对湿度
Figure FDA0002911876530000036
并传递给控制器，控制器通过判断烤烟室内当前空气温度与目标温度的差值以及当前空气湿度与目标湿度的差值，选择对应的系统工作模式；3) During the working process of the unit, the third sensor detects the current air temperature t 1 and relative humidity in the flue-cured tobacco room in real time
Figure FDA0002911876530000036
And transmit it to the controller, the controller selects the corresponding system working mode by judging the difference between the current air temperature and the target temperature in the flue-cured tobacco room and the difference between the current air humidity and the target humidity; 4)热泵烤烟系统运行期间，对比累计工作时间τ与系统预设检测时间间隔τs大小，τs范围为1-10min；若τs＞τ，则系统保持目前工作模式不变；若τs≤τ，则τ清零，系统回到步骤3)继续判断并调整工作状态。4) During the operation of the heat pump flue-cured tobacco system, compare the accumulated working time τ with the preset detection time interval τ s of the system, the range of τ s is 1-10min; if τ s >τ, the system keeps the current working mode unchanged; if τ s ≤τ, then τ is cleared to zero, and the system returns to step 3) to continue judging and adjusting the working state. 5.根据权利要求4所述的控制方法，其特征在于：步骤3)中根据控制器的判断结果，系统选择执行对应的升温模式、升温除湿模式、除湿模式或者调温除湿模式，具体为：5. control method according to claim 4 is characterized in that: in step 3), according to the judgment result of the controller, the system selects and executes the corresponding heating mode, heating and dehumidification mode, dehumidification mode or temperature adjustment and dehumidification mode, specifically: 31)若t1-t0＜-Δtd且
Figure FDA0002911876530000041
系统执行升温模式，控制器计算烤烟室内的实际温升速率dt，并将实际温升速率dt与目标温升速率上限值dtu、下限值dtd进行对比，根据对比结果进行系统调控；31) If t 1 -t 0 <-Δt d and
Figure FDA0002911876530000041
The system executes the heating mode, the controller calculates the actual temperature rise rate dt in the flue-cured tobacco room, and compares the actual temperature rise rate dt with the target temperature rise rate upper limit dt u and lower limit dt d , and performs system regulation according to the comparison result; 32)若t1-t0＜-Δtd且
Figure FDA0002911876530000042
系统执行升温除湿模式，控制器计算烤烟室内的实际除湿速率
Figure FDA0002911876530000043
并对比实际除湿速率
Figure FDA0002911876530000044
与目标除湿速率上限值
Figure FDA0002911876530000045
下限值
Figure FDA0002911876530000046
计算烤烟室内的实际温升速率dt，并对比实际温升速率dt与目标温升速率上限值dtu、下限值dtd，根据对比结果进行系统调控；32) If t 1 -t 0 <-Δt d and
Figure FDA0002911876530000042
The system executes the heating and dehumidification mode, and the controller calculates the actual dehumidification rate in the flue-cured tobacco room
Figure FDA0002911876530000043
And compare the actual dehumidification rate
Figure FDA0002911876530000044
and target dehumidification rate upper limit
Figure FDA0002911876530000045
lower limit
Figure FDA0002911876530000046
Calculate the actual temperature rise rate dt in the flue-cured tobacco room, and compare the actual temperature rise rate dt with the target temperature rise rate upper limit dt u and lower limit dt d , and perform system control according to the comparison results; 33)若-Δtd≤t1-t0≤Δtu且
Figure FDA0002911876530000047
系统执行除湿模式，控制器根据温度压力传感器采集的制冷剂压力计算蒸发温度te，对比蒸发温度te与预设最低蒸发温度ts，计算烤烟室内的实际除湿速率
Figure FDA0002911876530000048
并对比实际除湿速率
Figure FDA0002911876530000049
与目标除湿速率上限值
Figure FDA00029118765300000410
下限值
Figure FDA00029118765300000411
根据对比结果进行系统调控；33) If -Δt d ≤t 1 -t 0 ≤Δt u and
Figure FDA0002911876530000047
The system executes the dehumidification mode, the controller calculates the evaporation temperature te according to the refrigerant pressure collected by the temperature and pressure sensor, compares the evaporation temperature te with the preset minimum evaporation temperature ts , and calculates the actual dehumidification rate in the flue-cured tobacco room
Figure FDA0002911876530000048
And compare the actual dehumidification rate
Figure FDA0002911876530000049
and target dehumidification rate upper limit
Figure FDA00029118765300000410
lower limit
Figure FDA00029118765300000411
Carry out system control according to the comparison results; 34)若t1-t0＞-Δtd且
Figure FDA00029118765300000412
由控制器控制变频压缩机关机，并关闭室外换热器风机、电子膨胀阀和变频风机；34) If t 1 -t 0 >-Δt d and
Figure FDA00029118765300000412
The controller controls the inverter compressor to shut down, and closes the outdoor heat exchanger fan, electronic expansion valve and inverter fan; 35)若t1-t0＞Δtu且
Figure FDA00029118765300000413
系统执行调温除湿模式，由控制器计算烤烟室内的实际除湿速率
Figure FDA00029118765300000414
并对比实际除湿速率
Figure FDA00029118765300000415
与目标除湿速率上限值
Figure FDA00029118765300000416
下限值
Figure FDA00029118765300000417
计算烤烟室内的实际温降速率dt，并对比实际温降速率dt与目标温降速率上限值dtu、下限值dtd，根据对比结果进行系统调控。35) If t 1 -t 0 >Δt u and
Figure FDA00029118765300000413
The system executes the temperature adjustment and dehumidification mode, and the controller calculates the actual dehumidification rate in the flue-cured tobacco room
Figure FDA00029118765300000414
And compare the actual dehumidification rate
Figure FDA00029118765300000415
and target dehumidification rate upper limit
Figure FDA00029118765300000416
lower limit
Figure FDA00029118765300000417
Calculate the actual temperature drop rate dt in the flue-cured tobacco room, and compare the actual temperature drop rate dt with the target temperature drop rate upper limit dt u , lower limit dt d , and perform system control according to the comparison results. 6.根据权利要求5所述的控制方法，其特征在于：所述实际温升或温降速率dt为每个调节周期τs内的温升或者温降速率平均值，计算公式如下：6. control method according to claim 5 is characterized in that: described actual temperature rise or temperature drop rate dt is the temperature rise or temperature drop rate average value in each adjustment period τ s , and the calculation formula is as follows:
Figure FDA0002911876530000051
Figure FDA0002911876530000051
 其中，q为流过换热风箱的空气质量流量，单位为m3/s；tio为换热风箱进出口温度差，单位为℃；Vdry为烤烟室内的空气体积，单位为m3；Among them, q is the air mass flow through the heat exchange air box, the unit is m 3 /s; t io is the temperature difference between the inlet and outlet of the heat exchange air box, the unit is °C; V dry is the air volume in the flue-cured tobacco room, the unit is m 3 ; 所述实际除湿速率
Figure FDA0002911876530000052
为每个调节周期τs内的除湿速率平均值，通过以下公式进行计算：The actual dehumidification rate
Figure FDA0002911876530000052
The average value of the dehumidification rate in each adjustment period τ s is calculated by the following formula:
Figure FDA0002911876530000053
Figure FDA0002911876530000053
 其中
Figure FDA0002911876530000054
为换热风箱进出口相对含湿量差值。in
Figure FDA0002911876530000054
It is the relative humidity difference between the inlet and outlet of the heat exchange air box. 7.根据权利要求5所述的控制方法，其特征在于：步骤31)中根据实际温升速率dt对比目标温升速率上限值dtu、下限值dtd的结果，控制器对系统的调控具体为：7. control method according to claim 5 is characterized in that: in step 31), according to the result of actual temperature rise rate dt contrast target temperature rise rate upper limit value dt u , lower limit value dt d , the controller to the system's result. The control is specifically: 若dt＞dtu，则减小变频压缩机的转速，同时调整室外换热器的风机转速、电子膨胀阀的开度和变频风机的转速以适应变频压缩机转速变化；If dt>dt u , reduce the speed of the variable frequency compressor, and adjust the fan speed of the outdoor heat exchanger, the opening of the electronic expansion valve and the speed of the variable frequency fan to adapt to the speed change of the variable frequency compressor; 若dt＜dtd，则增大变频压缩机转速，同时调整室外换热器的风机转速、电子膨胀阀的开度和变频风机的转速以适应变频压缩机的转速变化；If dt < dt d , increase the speed of the inverter compressor, and adjust the fan speed of the outdoor heat exchanger, the opening of the electronic expansion valve and the speed of the inverter fan to adapt to the speed change of the inverter compressor; 若dtu≥dt≥dtd，系统工作参数不调整。If dt u ≥ dt ≥ dt d , the system operating parameters are not adjusted. 8.根据权利要求5所述的控制方法，其特征在于：步骤32)中根据实际除湿速率
Figure FDA0002911876530000061
对比目标除湿速率上限值
Figure FDA0002911876530000062
下限值
Figure FDA0002911876530000063
的结果，控制器对系统的调控具体为：8. control method according to claim 5 is characterized in that: in step 32), according to actual dehumidification rate
Figure FDA0002911876530000061
Compare the upper limit of the target dehumidification rate
Figure FDA0002911876530000062
lower limit
Figure FDA0002911876530000063
As a result, the controller's regulation of the system is as follows: 若
Figure FDA0002911876530000064
则减小可调式风门开度；若
Figure FDA0002911876530000065
则增大可调式风门开度；like
Figure FDA0002911876530000064
Then reduce the adjustable damper opening; if
Figure FDA0002911876530000065
Then increase the adjustable damper opening; 若
Figure FDA0002911876530000066
则可调式风门开度不变；然后，控制器根据实际温升速率dt对比目标温升速率上限值dtu、下限值dtd的结果，控制器对系统进行调控，具体为：like
Figure FDA0002911876530000066
Then, the opening of the adjustable damper remains unchanged; then, the controller controls the system according to the result of comparing the actual temperature rise rate dt with the upper limit dt u and the lower limit dt d of the target temperature rise rate, specifically: 若dt＞dtu，则减小变频压缩机转速，同时调整室外换热器风机的风速、电子膨胀阀开度和变频风机风速以适应压缩机转速变化；若dt＜dtd，则增大变频压缩机转速，同时调整室外换热器风机的风速、电子膨胀阀开度和变频风机风速以适应变频压缩机转速变化；若dtu≥dt≥dtd，系统工作参数不调整。If dt > dt u , reduce the speed of the variable frequency compressor, and adjust the wind speed of the outdoor heat exchanger fan, the opening of the electronic expansion valve and the wind speed of the variable frequency fan to adapt to the change of the compressor speed; if dt < dt d , increase the variable frequency Compressor speed, adjust the wind speed of outdoor heat exchanger fan, electronic expansion valve opening and variable frequency fan wind speed to adapt to the speed change of variable frequency compressor; if dt u ≥ dt ≥ dt d , the system operating parameters will not be adjusted. 9.根据权利要求5所述的控制方法，其特征在于：步骤33)中根据计算蒸发温度te与预设最低蒸发温度ts的比对结果，控制器对系统的调控具体为：9. control method according to claim 5 is characterized in that: in step 33), according to the comparison result of calculating evaporation temperature t e and preset minimum evaporation temperature t s , the regulation and control of controller to system is specifically: 若te＜ts，则立即减小变频压缩机转速，同时调整室外换热器风机风速、电子膨胀阀开度和风机风速以适应压缩机转速变化；If t e < ts , reduce the speed of the inverter compressor immediately, and adjust the fan speed of the outdoor heat exchanger, the opening of the electronic expansion valve and the fan speed to adapt to the change of the compressor speed; 若te≥ts，则不调整；然后，控制器根据实际除湿速率
Figure FDA0002911876530000067
对比目标除湿速率上限值
Figure FDA0002911876530000068
下限值
Figure FDA0002911876530000069
的结果，控制器对系统进行调控，具体为：If t e ≥ t s , do not adjust; then, the controller according to the actual dehumidification rate
Figure FDA0002911876530000067
Compare the upper limit of the target dehumidification rate
Figure FDA0002911876530000068
lower limit
Figure FDA0002911876530000069
As a result, the controller regulates the system, specifically: 若
Figure FDA00029118765300000610
则减小可调式风门开度和变频压缩机转速，同时调整室外换热器风机风速、电子膨胀阀开度和变频风机风速以适应变频压缩机转速变化；若
Figure FDA0002911876530000071
则增大可调式风门开度和变频压缩机转速，同时调整室外换热器风机风速、电子膨胀阀开度和变频风机风速以适应变频压缩机转速变化；若
Figure FDA0002911876530000072
则可调式风门开度和变频压缩机转速不变。like
Figure FDA00029118765300000610
Then reduce the opening of the adjustable damper and the speed of the variable frequency compressor, and adjust the fan speed of the outdoor heat exchanger, the opening of the electronic expansion valve and the wind speed of the variable frequency fan to adapt to the speed change of the variable frequency compressor; if
Figure FDA0002911876530000071
Then increase the opening of the adjustable damper and the speed of the inverter compressor, and adjust the fan speed of the outdoor heat exchanger, the opening of the electronic expansion valve and the fan speed of the inverter fan to adapt to the speed change of the inverter compressor; if
Figure FDA0002911876530000072
Then the adjustable damper opening and the inverter compressor speed remain unchanged. 10.根据权利要求5所述的控制方法，其特征在于：步骤35)中根据实际除湿速率
Figure FDA0002911876530000073
对比目标除湿速率上限值
Figure FDA0002911876530000074
下限值
Figure FDA0002911876530000075
的结果，控制器对系统的调控具体为：10. The control method according to claim 5, characterized in that: in step 35), according to the actual dehumidification rate
Figure FDA0002911876530000073
Compare the upper limit of the target dehumidification rate
Figure FDA0002911876530000074
lower limit
Figure FDA0002911876530000075
As a result, the controller's regulation of the system is as follows: 若
Figure FDA0002911876530000076
则减小变频风机转速；若
Figure FDA0002911876530000077
则增大变频风机转速；like
Figure FDA0002911876530000076
Then reduce the frequency conversion fan speed; if
Figure FDA0002911876530000077
Then increase the frequency conversion fan speed; 若
Figure FDA0002911876530000078
则不调整；然后，控制器根据实际温升速率dt对比目标温升速率上限值dtu、下限值dtd的结果，控制器对系统进行调控，具体为：like
Figure FDA0002911876530000078
Then, the controller controls the system according to the result of comparing the actual temperature rise rate dt with the upper limit value dt u and the lower limit value dt d of the target temperature rise rate, specifically: 若dt＞dtu，则减小变频压缩机转速，同时调整室外换热器风机风速、电子膨胀阀开度和变频风机风速以适应变频压缩机转速变化；若dt＜dtd，则增大变频压缩机转速，同时调整室外换热器风机风速、电子膨胀阀开度和变频风机风速以适应变频压缩机转速变化；若dtu≥dt≥dtd，系统工作参数不调整。If dt>dt u , reduce the speed of the variable frequency compressor, and adjust the fan speed of the outdoor heat exchanger, the opening of the electronic expansion valve and the wind speed of the variable frequency fan to adapt to the speed change of the variable frequency compressor; if dt < dt d , increase the variable frequency The speed of the compressor is adjusted, and the wind speed of the outdoor heat exchanger fan, the opening of the electronic expansion valve and the wind speed of the variable frequency fan are adjusted to adapt to the speed change of the variable frequency compressor;
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CN115875873B (en) * 2022-11-29 2023-07-18 青岛理工大学 Multifunctional drying heat pump system and operation control method

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