CN103822391B - A kind of alternating temperature Variable power dehumidification system and control method thereof - Google Patents
A kind of alternating temperature Variable power dehumidification system and control method thereof Download PDFInfo
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- CN103822391B CN103822391B CN201310630531.4A CN201310630531A CN103822391B CN 103822391 B CN103822391 B CN 103822391B CN 201310630531 A CN201310630531 A CN 201310630531A CN 103822391 B CN103822391 B CN 103822391B
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000003507 refrigerant Substances 0.000 claims description 25
- 230000007423 decrease Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
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Abstract
本发明提供一种变温变功率除湿系统及其控制方法，包括有压缩机、第一、二冷凝器、蒸发器、第一节流部件、储液器、第一、二干燥过滤器、四通阀、第二、三节流部件、第一、二电磁阀以及第一、二风机，压缩机与四通阀的D口连接，从四通阀的C口连接的管道按序串联有第一单向阀、第一冷凝器、第一干燥过滤器、第一节流部件、蒸发器以及储液器，第二电磁阀连接在压缩机与该储液器之间，分别与压缩机、四通阀的S口和E口连接的第二冷凝器与储液器之间连接有第二节流部件，第二冷凝器与第一冷凝器之间串联有第二干燥过滤器、第二单向阀以及第一电磁阀，第三节流部件与该第一电磁阀并联。本发明能实现升温除湿、等温除湿、降温除湿以及变功率除湿功能。
The invention provides a variable temperature and variable power dehumidification system and its control method, including a compressor, a first and a second condenser, an evaporator, a first throttling component, a liquid storage device, a first and a second drying filter, a four-way The valve, the second and third throttling components, the first and second solenoid valves, the first and second fans, and the compressor are connected to the D port of the four-way valve, and the pipeline connected to the C port of the four-way valve is connected in series with the first unit Directional valve, the first condenser, the first dry filter, the first throttling component, the evaporator and the liquid storage, the second electromagnetic valve is connected between the compressor and the liquid storage, and is connected with the compressor, the four-way A second throttling component is connected between the second condenser connected to the S port and E port of the valve and the liquid receiver, and the second dry filter and the second one-way filter are connected in series between the second condenser and the first condenser. valve and the first solenoid valve, and the third throttling component is connected in parallel with the first solenoid valve. The invention can realize the functions of temperature-increasing dehumidification, isothermal dehumidification, temperature-lowering dehumidification and variable power dehumidification.
Description
技术领域 technical field
本发明涉及空调除湿的技术领域，尤其是指一种变温变功率除湿系统及其控制方法。 The invention relates to the technical field of air-conditioning dehumidification, in particular to a dehumidification system with variable temperature and variable power and a control method thereof.
背景技术 Background technique
湿度是一个影响人体舒适度的重要因素，倘若室内的相对湿度较高，人们会感到潮湿闷热，因此，为了维持室内的舒适，应维持室内的空气湿度。然而，现有的除湿机功能单一，如高温烘干机一般用于高温除湿，而泳池除湿机一般用于恒温除湿，这样一些功能单一的除湿机满足不了变温除湿工作环境的需要。 Humidity is an important factor affecting human comfort. If the indoor relative humidity is high, people will feel hot and humid. Therefore, in order to maintain indoor comfort, the indoor air humidity should be maintained. However, the existing dehumidifiers have a single function. For example, high-temperature dryers are generally used for high-temperature dehumidification, while swimming pool dehumidifiers are generally used for constant temperature dehumidification. Such dehumidifiers with single functions cannot meet the needs of variable temperature dehumidification working environments.
发明内容 Contents of the invention
本发明的目的在于克服现有技术的不足，提供一种设计合理可靠、能实现升温除湿、等温除湿、降温除湿以及变功率除湿的变温变功率除湿系统及其控制方法。 The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a variable temperature and variable power dehumidification system and its control method which are reasonable and reliable in design and can realize temperature rising dehumidification, isothermal dehumidification, cooling dehumidification and variable power dehumidification.
为实现上述目的，本发明所提供的技术方案为：一种变温变功率除湿系统，它包括有压缩机、第一冷凝器、蒸发器、第一节流部件、储液器、第一干燥过滤器、四通阀、第二冷凝器、第二、三节流部件、第二干燥器、第一、二电磁阀、作用于第一冷凝器和蒸发器的第一风机以及作用于第二冷凝器的第二风机，其中，压缩机与四通阀的D口连接，从四通阀的C口连接的管道按序串联有第一单向阀、第一冷凝器、第一干燥过滤器、第一节流部件、蒸发器以及储液器，所述的第二电磁阀连接在压缩机与该储液器之间，而分别与压缩机、四通阀的S口和E口连接的第二冷凝器与储液器之间连接有第二节流部件，且该第二冷凝器与第一冷凝器之间串联有第二干燥器、第二单向阀以及第一电磁阀，第三节流部件与该第一电磁阀并联。 In order to achieve the above purpose, the technical solution provided by the present invention is: a dehumidification system with variable temperature and variable power, which includes a compressor, a first condenser, an evaporator, a first throttling component, a liquid reservoir, a first dry filter device, four-way valve, second condenser, second and third throttling parts, second dryer, first and second solenoid valves, first fan acting on the first condenser and evaporator and acting on the second condenser The second blower fan, wherein, the compressor is connected to the D port of the four-way valve, and the pipeline connected to the C port of the four-way valve is connected in series with the first one-way valve, the first condenser, the first dry filter, the first A throttling component, an evaporator and an accumulator, the second solenoid valve is connected between the compressor and the accumulator, and the second solenoid valve connected to the compressor, the S port and the E port of the four-way valve respectively A second throttling component is connected between the condenser and the liquid receiver, and a second dryer, a second one-way valve, and a first solenoid valve are connected in series between the second condenser and the first condenser, and the third section A flow member is connected in parallel with the first solenoid valve.
所述的第一节流部件和第二节流部件为电子膨胀阀。 The first throttling component and the second throttling component are electronic expansion valves.
所述的第三节流部件为热力膨胀阀。 The third throttling component is a thermal expansion valve.
为实现上述目的，本发明还提供一种变温变功率除湿系统的控制方法：若需要升温除湿时，进入步骤A；需要等温除湿时，进入步骤B；需要降温除湿时，进入步骤C，具体步骤如下： In order to achieve the above purpose, the present invention also provides a control method of the dehumidification system with variable temperature and variable power: if it is necessary to increase the temperature and dehumidification, enter step A; when it is necessary to be isothermal dehumidification, enter step B; as follows:
步骤A：四通阀和第二电磁阀断电，第一节流部件和第二节流部件通电，通过四通阀和第二单向阀控制流向，冷媒按序通过四通阀的D口和C口，通过第一节流部件和第二节流部件节流；当室内温度小于额定值时，第二风机以高风运行，当室内温度达到预定值后，第二风机由高风转为低风，当第二风机低风运行一段时间后，若室内温度保持不变，则第二风机保持低风运行，若室内温度逐渐偏高，大于额定值两度时，第二风机由低风转为停机，如室内温度逐渐降低时，低于额定值两度时，第二风机由低风转为高风运行；当系统需要增加除湿功率时，提高第一风机和第二风机转速，加大流经蒸发器和第二冷凝器的风量；当系统需要降低除湿功率时，减小第一风机转速，减少流经蒸发器的风量，第二风机功率保持不变。 Step A: Power off the four-way valve and the second solenoid valve, power on the first throttling part and the second throttling part, control the flow direction through the four-way valve and the second one-way valve, and the refrigerant passes through the D port of the four-way valve in sequence and port C, throttling through the first throttling part and the second throttling part; when the indoor temperature is lower than the rated value, the second fan runs at high wind speed, and when the indoor temperature reaches a predetermined value, the second fan turns from high wind When the second fan runs at low wind for a period of time, if the indoor temperature remains unchanged, the second fan will keep running at low wind. Wind turns to shutdown, such as when the indoor temperature drops gradually, when the temperature is lower than the rated value by two degrees, the second fan will turn from low wind to high wind operation; when the system needs to increase the dehumidification power, increase the speed of the first fan and the second fan, Increase the air volume flowing through the evaporator and the second condenser; when the system needs to reduce the dehumidification power, reduce the speed of the first fan, reduce the air volume flowing through the evaporator, and keep the power of the second fan unchanged.
步骤B：第二节流部件断电，四通阀、第一电磁阀、第二电磁阀以及第一节流部件通电，通过四通阀、第一单向阀、第一电磁阀、第二电磁阀和第二节流部件来控制流向，冷媒按序通过四通阀的D口和E口，通过第一节流部件节流；当室内温度等于额定温度时，第二风机以低风运行，第二风机低风运行一段时间后，若室内温度保持不变，则第二风机继续保持低风运行，若室内温度逐渐偏高，大于额定值两度时，第二风机由低风转为高，如室内温度逐渐降低时，低于额定值两度时，第二风机由低风转为停机运行；当需要增加除湿功率时，提高第一风机的转速，加大流经蒸发器的风量，第二风机功率保持不变；当需要降低除湿功率时，减小第一风机的转速，减少流经蒸发器的风量，第二风机功率保持不变。 Step B: The second throttling part is powered off, the four-way valve, the first solenoid valve, the second solenoid valve and the first throttling part are powered on, and the four-way valve, the first one-way valve, the first solenoid valve, the second The flow direction is controlled by the solenoid valve and the second throttling part, and the refrigerant passes through the D port and the E port of the four-way valve in sequence, and throttling through the first throttling part; when the indoor temperature is equal to the rated temperature, the second fan operates at low wind speed , after the second fan runs at low wind for a period of time, if the indoor temperature remains unchanged, the second fan will continue to run at low wind. High, such as when the indoor temperature drops gradually, when it is two degrees lower than the rated value, the second fan will turn from low wind to shutdown operation; when it is necessary to increase the dehumidification power, increase the speed of the first fan and increase the air volume flowing through the evaporator , the power of the second fan remains unchanged; when the dehumidification power needs to be reduced, the speed of the first fan is reduced to reduce the air volume flowing through the evaporator, and the power of the second fan remains unchanged.
步骤C：第二节流部件断电，四通阀、第一电磁阀、第二电磁阀以及第一节流部件通电，通过四通阀、第一单向阀、第一电磁阀、第二电磁阀和第二节流部件来控制流向，冷媒按序通过四通阀的D口和E口，通过第一节流部件和第三节流部件节流；当室内温度大于额定温度时，第二风机以高风运行，当室内温度降到额定值后，第二风机由高风转为低风，第二风机低风运行一段时间后，若室内温度保持不变，则第二风机保持低风运行，若室内温度逐渐偏高，大于额定值两度时，第二风机由低风转为高风，如室内温度逐渐降低时，低于额定值两度时，第二风机由低风转为停机运行；当需要增加除湿功率时，提高第一风机的转速，加大流经蒸发器的风量，第二风机功率保持不变；当需要降低除湿功率时，减小第一风机的转速，减少流经蒸发器的风量，第二风机功率保持不变。 Step C: The second throttling part is powered off, the four-way valve, the first solenoid valve, the second solenoid valve and the first throttling part are powered on, and the four-way valve, the first one-way valve, the first solenoid valve, the second Solenoid valve and the second throttling part to control the flow direction, the refrigerant passes through the D port and E port of the four-way valve in sequence, and throttling through the first throttling part and the third throttling part; when the indoor temperature is higher than the rated temperature, the first throttling part The second fan operates at high wind speed. When the indoor temperature drops to the rated value, the second fan turns from high wind to low wind. Wind operation, if the indoor temperature is gradually high, when it is two degrees higher than the rated value, the second fan will turn from low wind to high wind, if the indoor temperature gradually decreases, when it is lower than the rated value When the dehumidification power needs to be increased, the speed of the first fan is increased to increase the air volume flowing through the evaporator, and the power of the second fan remains unchanged; when the dehumidification power needs to be reduced, the speed of the first fan is reduced. The air volume flowing through the evaporator is reduced, and the power of the second blower remains unchanged.
本发明在采用了上述方案后，其最大优点在于通过各部件有机组合，系统能多流路工作，从而实现升温除湿、等温除湿、降温除湿以及变功率除湿功能，以满足变温除湿工作环境的需要。 After adopting the above scheme, the biggest advantage of the present invention is that the system can work with multiple flow paths through the organic combination of various components, so as to realize the functions of heating dehumidification, isothermal dehumidification, cooling dehumidification and variable power dehumidification to meet the needs of variable temperature dehumidification working environment .
附图说明 Description of drawings
图1为本发明的示意图。 Figure 1 is a schematic diagram of the present invention.
图2为本发明升温除湿时的示意图。 Fig. 2 is a schematic diagram of the present invention when the temperature is raised for dehumidification.
图3为本发明等温除湿时的示意图。 Fig. 3 is a schematic diagram of the present invention during isothermal dehumidification.
图4为本发明降温除湿时的示意图。 Fig. 4 is a schematic diagram of the present invention during cooling and dehumidification.
具体实施方式 detailed description
下面结合具体实施例对本发明作进一步说明。 The present invention will be further described below in conjunction with specific examples.
参见附图1至附图4所示，本实施例所述的变温变功率除湿系统，它包括有压缩机1、第一冷凝器2、蒸发器3、第一节流部件4、储液器5、第一干燥过滤器6、四通阀7、第二冷凝器8、第二、三节流部件10、15、第二干燥器11、第一、二电磁阀13、14、作用于第一冷凝器2和蒸发器3的第一风机16以及作用于第二冷凝器8的第二风机17，其中，压缩机1通过管道与四通阀7的D口连接，从四通阀7C口连接的管道按序串联有第一单向阀9、第一冷凝器2、第一干燥过滤器6、第一节流部件4、蒸发器3以及储液器5，所述的第二电磁阀14连接在压缩机1与该储液器5之间，而通过管道分别与压缩机1、四通阀7的S口和E口连接的第二冷凝器8与储液器5之间连接有第二节流部件10，且该第二冷凝器8与第一冷凝器2之间连接的管道上串联有第二干燥器11、第二单向阀12以及第一电磁阀13，第三节流部件15与该第一电磁阀13并联。本实施例中所述的第一节流部件4和第二节流部件10均为电子膨胀阀，而第三节流部件15为热力膨胀阀。 Referring to accompanying drawings 1 to 4, the variable temperature and variable power dehumidification system described in this embodiment includes a compressor 1, a first condenser 2, an evaporator 3, a first throttling component 4, and a liquid accumulator 5. The first dry filter 6, the four-way valve 7, the second condenser 8, the second and third throttling components 10, 15, the second dryer 11, the first and second solenoid valves 13, 14, acting on the first The first fan 16 of the condenser 2 and the evaporator 3 and the second fan 17 acting on the second condenser 8, wherein the compressor 1 is connected to the D port of the four-way valve 7 through a pipeline, and connected to the four-way valve 7C port The pipeline is connected in series with the first one-way valve 9, the first condenser 2, the first dry filter 6, the first throttling component 4, the evaporator 3 and the liquid reservoir 5, and the second solenoid valve 14 Connected between the compressor 1 and the liquid accumulator 5, and the second condenser 8 connected to the S port and the E port of the compressor 1 and the four-way valve 7 through pipelines and the liquid accumulator 5 are connected with the first Two throttling components 10, and the pipeline connected between the second condenser 8 and the first condenser 2 is connected in series with a second dryer 11, a second check valve 12 and a first electromagnetic valve 13, and the third throttling A component 15 is connected in parallel with this first solenoid valve 13 . The first throttling component 4 and the second throttling component 10 described in this embodiment are both electronic expansion valves, while the third throttling component 15 is a thermal expansion valve.
当系统升温除湿工作时，四通阀7和第二电磁阀14断电，第一节流部件4和第二节流部件10通电，通过四通阀7和第二单向阀12控制流向，通过第一节流部件4和第二节流部件10节流；冷媒经过压缩机1压缩后，高温高压的冷媒经过四通阀7的D口和C口流向第一单向阀9，经过第一冷凝器2放热后经第一干燥过滤器6的干燥和过滤处理，再经电子膨胀阀节流后流向蒸发器3，冷媒在蒸发器3完成蒸发吸热时完成除湿，经蒸发器3热交换后的冷媒通过储液器5流向第二节流部件10，冷媒经过第二节流部件10的节流后流向第二冷凝器8进行蒸发吸热，通过第二冷凝器8换热后的冷媒经四通阀7的E口和S口流回压缩机，这样的一个回路系统即可完成升温除湿。在升温除湿的过程中，当室内温度小于额定值时，第二风机17以高风运行，当室内温度达到预定值后，第二风机17由高风转为低风，当第二风机17低风运行三分钟后，若室内温度保持不变，则第二风机17保持低风运行，若室内温度逐渐偏高，大于额定值两度时，第二风机17由低风转为停机，如室内温度逐渐降低时，低于额定值两度时，第二风机17由低风转为高风运行；当系统需要增加除湿功率时，提高第一风机16和第二风机17转速，加大流经蒸发器3和第二冷凝器8的风量；当系统需要降低除湿功率时，减小第一风机16转速，减少流经蒸发器3的风量，第二风机17功率保持不变。 When the system heats up and dehumidifies, the four-way valve 7 and the second solenoid valve 14 are de-energized, the first throttling part 4 and the second throttling part 10 are powered on, and the flow direction is controlled by the four-way valve 7 and the second one-way valve 12. Throttling through the first throttling part 4 and the second throttling part 10; after the refrigerant is compressed by the compressor 1, the high-temperature and high-pressure refrigerant flows through the D port and the C port of the four-way valve 7 to the first one-way valve 9, and then passes through the second After the condenser 2 releases heat, it is dried and filtered by the first drying filter 6, and then flows to the evaporator 3 after being throttled by the electronic expansion valve. After heat exchange, the refrigerant flows to the second throttling part 10 through the liquid accumulator 5, and after being throttled by the second throttling part 10, the refrigerant flows to the second condenser 8 to evaporate and absorb heat, and after exchanging heat through the second condenser 8 The refrigerant flows back to the compressor through the E port and S port of the four-way valve 7, and such a loop system can complete the heating and dehumidification. In the process of heating up and dehumidifying, when the indoor temperature is lower than the rated value, the second blower fan 17 operates at high wind speed, and when the indoor temperature reaches a predetermined value, the second blower fan 17 changes from high wind speed to low wind speed. After the wind runs for three minutes, if the indoor temperature remains unchanged, the second blower fan 17 will keep running at low wind speed. When the temperature gradually decreases, when the temperature is lower than the rated value by two degrees, the second fan 17 changes from low wind to high wind operation; The air volume of the evaporator 3 and the second condenser 8; when the system needs to reduce the dehumidification power, the speed of the first fan 16 is reduced to reduce the air volume flowing through the evaporator 3, and the power of the second fan 17 remains unchanged.
当系统等温除湿工作时，第二节流部件断电，四通阀、第一电磁阀、第二电磁阀以及第一节流部件通电，通过四通阀、第一单向阀、第一电磁阀、第二电磁阀和第二节流部件来控制流向，通过第一节流部件节流；冷媒经过压缩机1压缩后，高温高压的冷媒经过四通阀7的D口和E口流向第二冷凝器8进行放热，冷媒在第二冷凝器8完成热交换后经第二干燥过滤器11的干燥和过滤处理，经第二干燥过滤器11处理后的冷媒经第二单向阀12后再经第一电磁阀13流向第一冷凝器2再次进行放热，冷媒在第一冷凝器2完成热交换后经第一干燥过滤器6的干燥和过滤处理，再经电子膨胀阀节流后流向蒸发器3，冷媒在蒸发器3完成蒸发吸热时完成除湿，经蒸发器3热交换后的冷媒通过储液器5和第二电磁阀14直接流回压缩机，这样的一个回路系统即可完成等温除湿。在等温除湿的过程中，当室内温度等于额定温度时，第二风机17以低风运行，第二风机17低风运行三分钟后，若室内温度保持不变，则第二风机17继续保持低风运行，若室内温度逐渐偏高，大于额定值两度时，第二风机17由低风转为高，如室内温度逐渐降低时，低于额定值两度时，第二风机17由低风转为停机运行；当需要增加除湿功率时，提高第一风机16的转速，加大流经蒸发器3的风量，第二风机17功率保持不变；当需要降低除湿功率时，减小第一风机16的转速，减少流经蒸发器3的风量，第二风机17功率保持不变。 When the system is working in isothermal dehumidification, the second throttling part is de-energized, the four-way valve, the first solenoid valve, the second solenoid valve and the first throttling part are powered on, through the four-way valve, the first one-way valve, the first solenoid Valve, the second solenoid valve and the second throttling part to control the flow direction, throttling through the first throttling part; after the refrigerant is compressed by the compressor 1, the high-temperature and high-pressure refrigerant flows through the D port and the E port of the four-way valve 7 to the first The second condenser 8 releases heat, and the refrigerant is dried and filtered by the second drying filter 11 after the second condenser 8 completes the heat exchange, and the refrigerant treated by the second drying filter 11 passes through the second one-way valve 12 Then it flows to the first condenser 2 through the first electromagnetic valve 13 to release heat again. After the heat exchange in the first condenser 2 is completed, the refrigerant is dried and filtered by the first drying filter 6, and then throttled by the electronic expansion valve. Then it flows to the evaporator 3, and the refrigerant completes dehumidification when the evaporator 3 completes evaporation and heat absorption, and the refrigerant after heat exchange in the evaporator 3 directly flows back to the compressor through the liquid receiver 5 and the second solenoid valve 14, such a loop system Isothermal dehumidification can be completed. In the process of isothermal dehumidification, when the indoor temperature is equal to the rated temperature, the second fan 17 operates at a low wind speed. After the second fan 17 runs at a low wind speed for three minutes, if the indoor temperature remains unchanged, the second fan 17 continues to maintain a low wind speed. Wind operation, if the indoor temperature is gradually high, when it is two degrees higher than the rated value, the second fan 17 will be turned from low wind to high, such as when the indoor temperature is gradually reduced, when it is two degrees lower than the rated value, the second fan 17 will be turned from low wind to high. Change to shutdown operation; when it is necessary to increase the dehumidification power, increase the rotating speed of the first fan 16, increase the air volume flowing through the evaporator 3, and the power of the second fan 17 remains unchanged; when it is necessary to reduce the dehumidification power, reduce the first The speed of the fan 16 reduces the air volume flowing through the evaporator 3, and the power of the second fan 17 remains unchanged.
当系统降温除湿工作时，冷媒经过压缩机1压缩后，高温高压的冷媒经过四通阀7的D口和E口流向第二冷凝器8进行放热，冷媒在第二冷凝器8完成热交换后经第二干燥过滤器11的干燥和过滤处理，经第二干燥过滤器11处理过的冷媒通过第二单向阀12，冷媒接着经过第三节流部件15节流后流向第一冷凝器2进行蒸发吸热，冷媒在第一冷凝器2完成热交换后经第一干燥过滤器6的干燥和过滤处理，再经电子膨胀阀节流后流向蒸发器3再次蒸发吸热，冷媒在蒸发器3完成换热时完成除湿，经蒸发器3热交换后的冷媒通过储液器5和第二电磁阀14直接流回压缩机，这样的一个回路系统即可完成降温除湿。在降温除湿的过程中，当室内温度大于额定温度时，第二风机17以高风运行，当室内温度降到额定值后，第二风机17由高风转为低风，第二风机17低风运行三分钟后，若室内温度保持不变，则第二风机17保持低风运行，若室内温度逐渐偏高，大于额定值两度时，第二风机17由低风转为高风，如室内温度逐渐降低时，低于额定值两度时，第二风机17由低风转为停机运行；当需要增加除湿功率时，提高第一风机16的转速，加大流经蒸发器3的风量，第二风机17功率保持不变；当需要降低除湿功率时，减小第一风机16的转速，减少流经蒸发器3的风量，第二风机17功率保持不变。 When the system is cooling and dehumidifying, after the refrigerant is compressed by the compressor 1, the high-temperature and high-pressure refrigerant flows to the second condenser 8 through the ports D and E of the four-way valve 7 to release heat, and the refrigerant completes heat exchange in the second condenser 8 After being dried and filtered by the second drying filter 11, the refrigerant treated by the second drying filter 11 passes through the second one-way valve 12, and then flows to the first condenser after throttling by the third throttling member 15 2. Evaporate and absorb heat. After the heat exchange is completed in the first condenser 2, the refrigerant is dried and filtered by the first drying filter 6. After being throttled by the electronic expansion valve, it flows to the evaporator 3 to evaporate and absorb heat again. The refrigerant is evaporating The dehumidification is completed when the evaporator 3 completes the heat exchange, and the refrigerant after heat exchange by the evaporator 3 flows directly back to the compressor through the liquid receiver 5 and the second solenoid valve 14, and such a loop system can complete cooling and dehumidification. In the process of cooling and dehumidification, when the indoor temperature is higher than the rated temperature, the second fan 17 operates at high wind speed, and when the indoor temperature drops to the rated value, the second fan 17 changes from high wind to low wind, and the second fan 17 runs at low wind speed. After the wind runs for three minutes, if the indoor temperature remains unchanged, the second blower fan 17 keeps running at a low wind speed. When the indoor temperature gradually decreases, when the temperature is lower than the rated value by two degrees, the second fan 17 turns from low wind to shutdown operation; when the dehumidification power needs to be increased, the speed of the first fan 16 is increased to increase the air volume flowing through the evaporator 3 , the power of the second fan 17 remains unchanged; when the dehumidification power needs to be reduced, the speed of the first fan 16 is reduced to reduce the air volume flowing through the evaporator 3, and the power of the second fan 17 remains unchanged.
以上所述之实施例子只为本发明之较佳实施例，并非以此限制本发明的实施范围，故凡依本发明之形状、原理所作的变化，均应涵盖在本发明的保护范围内。 The implementation examples described above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, all changes made according to the shape and principle of the present invention should be covered within the scope of protection of the present invention.
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