阅读说明：本技术 一种太阳能化学蓄热除湿系统及工作方法 (Solar chemical heat storage dehumidification system and working method ) 是由 何兆红 黄宏宇 李军 邓立生 刘林 曾涛 李兴 大坂侑吾 于 2021-02-08 设计创作，主要内容包括：本发明公开了一种太阳能化学蓄热除湿系统及工作方法,涉及除湿技术领域,包括太阳能集热器、化学蓄热单元和除湿单元,所述化学蓄热单元包括第一化学蓄热反应器、第二化学蓄热反应器、蒸发器、冷凝器和水箱；所述除湿单元包括翅片换热器、除湿器和设于翅片换热器的相关风道,其中,太阳能集热器与翅片换热器器、除湿器以及水箱通过管道相连以形成回路；太阳能集热器与第一化学蓄热反应器、第二化学蓄热反应器、冷凝器以及水箱通过管道相连以形成回路；第一化学蓄热反应器、第二化学蓄热反应器、翅片换热器、除湿器、蒸发器、冷凝器以及水箱通过管道相连以形成回路；第一化学蓄热反应器和第二化学蓄热反应器分别装有不同蓄热温度的化学蓄热材料。(The invention discloses a solar chemical heat storage dehumidification system and a working method thereof, which relate to the technical field of dehumidification and comprise a solar heat collector, a chemical heat storage unit and a dehumidification unit, wherein the chemical heat storage unit comprises a first chemical heat storage reactor, a second chemical heat storage reactor, an evaporator, a condenser and a water tank; the dehumidification unit comprises a fin heat exchanger, a dehumidifier and a related air duct arranged on the fin heat exchanger, wherein the solar heat collector, the fin heat exchanger, the dehumidifier and the water tank are connected through pipelines to form a loop; the solar heat collector is connected with the first chemical heat accumulation reactor, the second chemical heat accumulation reactor, the condenser and the water tank through pipelines to form a loop; the first chemical heat accumulation reactor, the second chemical heat accumulation reactor, the fin heat exchanger, the dehumidifier, the evaporator, the condenser and the water tank are connected through pipelines to form a loop; the first chemical heat storage reactor and the second chemical heat storage reactor are respectively filled with chemical heat storage materials with different heat storage temperatures.)

1. A solar chemical heat storage dehumidification system comprises a solar heat collector, a chemical heat storage unit and a dehumidification unit, and is characterized in that the chemical heat storage unit comprises a first chemical heat storage reactor, a second chemical heat storage reactor, an evaporator, a condenser and a water tank; the dehumidification unit comprises a fin heat exchanger, a dehumidifier and a related air duct arranged on the fin heat exchanger, wherein,

the solar heat collector, the fin heat exchanger, the dehumidifier and the water tank are connected through pipelines to form a loop;

the solar heat collector is connected with the first chemical heat accumulation reactor, the second chemical heat accumulation reactor, the condenser and the water tank through pipelines to form a loop;

the first chemical heat accumulation reactor, the second chemical heat accumulation reactor, the fin heat exchanger, the dehumidifier, the evaporator, the condenser and the water tank are connected through pipes to form a loop;

the first chemical heat storage reactor and the second chemical heat storage reactor are respectively filled with chemical heat storage materials with different heat storage temperatures.

2. The solar chemical heat storage and dehumidification system according to claim 2, wherein the chemical heat storage materials with different heat storage temperatures are calcium chloride and lithium hydroxide.

3. A solar chemical heat storage dehumidification operation method for the solar chemical heat storage dehumidification system according to any one of claims 1 to 2, comprising a first operation mode, a second operation mode, a third operation mode and a fourth operation mode, wherein,

the first operation mode is used for a daytime dehumidification and heat storage process, and includes:

when the solar heat collector works, a part of hot water generated by the solar heat collector is exchanged for air regeneration of the air channel through the fin heat exchanger to provide a regeneration heat source for a dehumidification process, and then the hot water flows back to the water tank to perform the dehumidification process;

meanwhile, in the dehumidification process, a third valve, a fourth valve, a sixth valve, an eighth valve and a ninth valve are opened, the other part of hot water generated by the solar heat collector respectively flows through the first chemical heat storage reactor and the second chemical heat storage reactor and is subjected to decomposition reaction in the first chemical heat storage reactor and the second chemical heat storage reactor, water vapor generated by the decomposition reaction enters the condenser for condensation, the hot water flowing through the chemical heat storage reactor flows back to the water tank for a chemical heat storage process, and the pressure in the chemical heat storage reactor is reduced;

the second working mode is used for the process of heat release and dehumidification at night or when the solar light is weaker than the set degree, and comprises the following steps:

opening a second valve, a third valve and a fifth valve, opening the fifth valve between the evaporator and the low-temperature chemical heat storage reactor, starting evaporation in the evaporator, and allowing water vapor in the evaporator to enter the low-temperature chemical heat storage reactor to perform hydration and exothermic reaction with a chemical heat storage material because the pressure in the chemical heat storage reactor is lower than the pressure in the evaporator, wherein the generated hot water heats air channel to regenerate air through a fin heat exchanger, a dehumidification process regeneration heat source is provided, and hot water at an outlet of the fin heat exchanger flows back to a water tank;

the third operating mode is for a temperature step heat storage dehumidification process, and includes:

firstly, a chemical heat accumulation reactor of a low-temperature chemical heat accumulation reactor generates hydration exothermic reaction to provide a regeneration heat source in a dehumidification process; when the temperature of a hot water outlet of the chemical heat storage reactor cannot meet the dehumidification requirement, the high-temperature chemical heat storage reactor generates hydration exothermic reaction to provide a regeneration heat source for the dehumidification process, and hot water flowing through the fin heat exchanger enters the low-temperature chemical heat storage reactor to perform the heat storage process; when the temperature of a hot water outlet of the high-temperature chemical heat accumulation reactor cannot meet the dehumidification requirement, the low-temperature chemical heat accumulation reactor generates hydration exothermic reaction to provide a regeneration heat source in the dehumidification process;

when hot water at the outlet of the low-temperature chemical heat storage reactor cannot meet the requirement of a dehumidification heat source, opening a second valve, a fourth valve, a seventh valve, an eighth valve and a ninth valve, closing a fifth valve, opening a ninth valve between an evaporator and a high-temperature chemical heat storage reactor, opening an eighth valve between a condenser and the low-temperature chemical heat storage reactor, closing the fifth valve between the evaporator and the low-temperature chemical heat storage reactor, leading water vapor to enter the high-temperature chemical heat storage reactor from the evaporator due to the fact that the pressure in the evaporator is higher than the pressure in the high-temperature chemical heat storage reactor, carrying out hydration exothermic reaction, leading the generated hot water to pass through a fin heat exchanger heating air channel to regenerate air, providing a regeneration heat source in the dehumidification process, leading hot water at the outlet of the fin heat exchanger to flow back to a water tank, leading the hot water to enter the low-temperature chemical heat storage reactor from the, the low-temperature chemical heat accumulation reactor carries out decomposition reaction, the generated water vapor enters a condenser for condensation, and the low-temperature chemical heat accumulation reactor carries out the heat accumulation process again;

when hot water at the outlet of the high-temperature chemical heat accumulation reactor cannot meet the requirement of a dehumidification heat source, opening a fifth valve, closing an eighth valve and a ninth valve, opening a fifth valve between an evaporator and the low-temperature chemical heat accumulation reactor, closing the ninth valve between the evaporator and the high-temperature chemical heat accumulation reactor and closing the eighth valve between a condenser and the low-temperature chemical heat accumulation reactor, and due to the pressure difference between the evaporator and the low-temperature chemical heat accumulation reactor, water vapor enters the low-temperature chemical heat accumulation reactor from the evaporator to generate hydration heat release reaction, and the generated hot water heats air channel regeneration air through a fin heat exchanger to provide a regeneration heat source for a dehumidifier;

the fourth mode of operation is for a condensation heat recovery process, comprising:

when the condenser starts to work, a tenth valve between the condenser and the fin heat exchanger is opened, and condensation heat generated in the condensation process preheats air regenerated by the air duct and is recovered.

Technical Field

The invention relates to the technical field of dehumidification, in particular to a solar chemical heat storage dehumidification system and a working method.

Background

The temperature and humidity control is air conditioning which is unnecessary to be reduced in human life, the temperature and humidity independent control air conditioner overcomes the defects that the traditional air conditioner is high in energy consumption, cannot meet the requirement of large heat-humidity ratio variation range and has potential health threats caused by mold, the energy-saving and air quality-improving air conditioner has great advantages, and particularly for an environment with large humidity, the independent control of the temperature and the humidity is urgent.

Except the cooling dehumidification mode adopted by the traditional air conditioner, the dehumidifier generally selects liquid dehumidification or solid dehumidification, and the regeneration process needs a large amount of energy consumption. In order to improve the problem, a dehumidification technology is coupled with a solar heat utilization technology, and solar energy is used as a heat source of a dehumidifier to realize indoor humidity control, so that power consumption is saved.

The problems of instability, intermittence and the like of solar heat seriously affect the use reliability of a solar dehumidification technology, and the continuity of a regenerated heat source is generally ensured by adopting technologies such as a heat storage or auxiliary heat source and the like.

The invention patent application No. 201210497541.0 relates to a solar dehumidifying air-conditioning system, which mainly comprises a solar heat collector, an energy accumulator, a dehumidifying rotating wheel and a heat exchanger, wherein the solar heat collector and the rotating wheel are used for dehumidifying, regenerating and heating to provide a regenerated heat source; when the unit is not used or is in low load, the high-temperature heat conduction oil can be stored in the energy storage device and used when solar energy does not meet the heating temperature requirement, a conventional energy supplement interface is additionally arranged, and electric power is switched in as regenerative driving energy when required. In order to ensure that the solar energy utilization rate of the system is high, the energy storage device needs to be provided with larger volume and capacity, so that the whole solar dehumidification system is low in economy and obstructs application.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the solar chemical heat storage dehumidification system and the working method thereof, which utilize different chemical heat storage materials to realize the heat release and heat storage processes, simultaneously recover the condensation heat, improve the heat utilization efficiency of the system and further improve the heat efficiency of the solar dehumidification system.

In order to achieve the purpose, the invention adopts the following technical scheme:

a solar chemical heat storage dehumidification system comprises a solar heat collector, a chemical heat storage unit and a dehumidification unit, wherein the chemical heat storage unit comprises a first chemical heat storage reactor, a second chemical heat storage reactor, an evaporator, a condenser and a water tank; the dehumidification unit comprises a fin heat exchanger, a dehumidifier and a related air duct arranged on the fin heat exchanger, wherein,

the solar heat collector, the fin heat exchanger, the dehumidifier and the water tank are connected through pipelines to form a loop;

the solar heat collector is connected with the first chemical heat accumulation reactor, the second chemical heat accumulation reactor, the condenser and the water tank through pipelines to form a loop;

the first chemical heat accumulation reactor, the second chemical heat accumulation reactor, the fin heat exchanger, the dehumidifier, the evaporator, the condenser and the water tank are connected through pipelines to form a loop;

the first chemical heat storage reactor and the second chemical heat storage reactor are respectively provided with chemical heat storage materials with different heat storage temperatures, the chemical heat storage reactor with the low heat storage temperature is a low-temperature chemical heat storage reactor, and the second chemical heat storage reactor with the high heat storage temperature is a high-temperature chemical heat storage reactor. .

In the solar chemical heat storage dehumidification system, the chemical heat storage materials with different heat storage temperatures are calcium chloride and lithium hydroxide.

A solar chemical heat storage dehumidification working method is used for the solar chemical heat storage dehumidification system and comprises a first working mode, a second working mode, a third working mode and a fourth working mode, wherein,

the first operation mode is used for a daytime dehumidification and heat storage process, and includes:

when the valve 1 and the valve 2 are opened, when the solar heat collector works, a part of hot water generated by the solar heat collector is exchanged for air regeneration of an air channel through the fin heat exchanger to provide a regeneration heat source for a dehumidification process, and then the hot water flows back to the water tank to perform the dehumidification process;

meanwhile, in the dehumidification process, a valve 3, a valve 4, a valve 6, a valve 8 and a valve 9 are opened, the other part of hot water generated by the solar heat collector flows through a first chemical heat accumulation reactor and a second chemical heat accumulation reactor respectively and is subjected to decomposition reaction in the first chemical heat accumulation reactor and the second chemical heat accumulation reactor, the steam generated by the decomposition reaction enters a condenser for condensation, the hot water flowing through the chemical heat accumulation reactor flows back to a water tank for a chemical heat accumulation process, and the pressure in the chemical heat accumulation reactor is reduced;

the second working mode is used for the process of heat release and dehumidification at night or when the solar light is weaker than the set degree, and comprises the following steps:

opening the valve 2, the valve 3 and the valve 5, opening the valve 5 between the evaporator and the low-temperature chemical heat storage reactor, starting evaporation in the evaporator, and allowing water vapor in the evaporator to enter the low-temperature chemical heat storage reactor to perform hydration exothermic reaction with a chemical heat storage material because the pressure in the chemical heat storage reactor is lower than the pressure in the evaporator, wherein the generated hot water heats air channel through a fin heat exchanger to regenerate air and provide a heat source for regeneration in a dehumidification process, and hot water at an outlet of the fin heat exchanger flows back to a water tank;

the third operating mode is for a temperature step heat storage dehumidification process, and includes:

firstly, a chemical heat accumulation reactor of a low-temperature chemical heat accumulation reactor generates hydration exothermic reaction to provide a regeneration heat source in a dehumidification process; when the temperature of a hot water outlet of the chemical heat storage reactor cannot meet the dehumidification requirement, the high-temperature chemical heat storage reactor generates hydration exothermic reaction to provide a regeneration heat source for the dehumidification process, and hot water flowing through the fin heat exchanger enters the low-temperature chemical heat storage reactor to perform the heat storage process; when the temperature of a hot water outlet of the high-temperature chemical heat accumulation reactor cannot meet the dehumidification requirement, the low-temperature chemical heat accumulation reactor generates hydration exothermic reaction to provide a regeneration heat source in the dehumidification process;

when hot water at the outlet of the low-temperature chemical heat storage reactor cannot meet the requirement of a dehumidification heat source, a valve 2, a valve 4, a valve 7, a valve 8 and a valve 9 are opened, the valve 5 is closed, the valve 9 between an evaporator and a high-temperature chemical heat storage reactor is opened, the valve 8 between a condenser and the low-temperature chemical heat storage reactor is opened, the valve 5 between the evaporator and the low-temperature chemical heat storage reactor is closed, water vapor enters the high-temperature chemical heat storage reactor from the evaporator due to the fact that the pressure in the evaporator is larger than the pressure in the high-temperature chemical heat storage reactor, hydration exothermic reaction occurs, the generated hot water heats air through an air channel through a fin heat exchanger, a dehumidification process regeneration heat source is provided, hot water at the outlet of the fin heat exchanger flows back to a water tank, then enters the low-temperature chemical heat storage reactor from the, the low-temperature chemical heat accumulation reactor carries out decomposition reaction, the generated water vapor enters a condenser for condensation, and the low-temperature chemical heat accumulation reactor carries out the heat accumulation process again;

when hot water at the outlet of the high-temperature chemical heat accumulation reactor cannot meet the requirement of a dehumidification heat source, opening a valve 5, closing a valve 8 and a valve 9, opening the valve 5 between an evaporator and a low-temperature chemical heat accumulation reactor, and closing the valve 9 between the evaporator and the high-temperature chemical heat accumulation reactor, and the valve 8 between a condenser and the low-temperature chemical heat accumulation reactor, so that water vapor enters the low-temperature chemical heat accumulation reactor from the evaporator to generate hydration exothermic reaction due to the pressure difference between the evaporator and the low-temperature chemical heat accumulation reactor, and the generated hot water heats air channels through fin heat exchangers to regenerate air, thereby providing a regeneration heat source for a dehumidifier;

the fourth mode of operation is for a condensation heat recovery process, comprising:

when the condenser starts to work, a tenth valve between the condenser and the fin heat exchanger is opened, and condensation heat generated in the condensation process preheats air regenerated by the air duct and is recovered.

Compared with the prior art, the invention has the beneficial effects that:

1. the solar heat storage dehumidification system comprises a chemical heat storage part, so that the problems of instability, discontinuity and the like of solar heat can be effectively solved, stable heat source output is realized, and the reliability of the solar heat storage dehumidification system is improved;

2. the solar heat storage dehumidification system comprises chemical heat storage material reactors with different heat storage temperatures, can realize temperature gradient heat storage and release, and recycle condensation heat, effectively improves the heat utilization efficiency of the system, is favorable for reducing the volume of the system, and expands the application range of the solar dehumidification system.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a solar chemical heat storage dehumidification system according to an embodiment of the present invention.

In the drawings: 1. a solar heat collector; 2. a finned heat exchanger; 3. a first chemical thermal storage reactor; 4. a second chemical heat storage reactor; 5. an evaporator; 6. a condenser; 7, a dehumidifier, 8 and a water tank; 9. an air duct.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example (b):

it should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a solar chemical heat storage dehumidification system according to an embodiment of the present invention.

A solar chemical heat storage dehumidification system comprises a solar heat collector 1, a chemical heat storage unit and a dehumidification unit, wherein the chemical heat storage unit comprises a first chemical heat storage reactor 3, a second chemical heat storage reactor 4, an evaporator 5, a condenser 6 and a water tank 8; the dehumidification unit comprises a fin heat exchanger 2, a dehumidifier 7 and a related air duct 9 arranged on the fin heat exchanger 2, wherein the solar heat collector 1, the fin heat exchanger 2, the dehumidifier 7 and a water tank 8 are connected through pipelines to form a loop; the solar heat collector 1 is connected with the first chemical heat accumulation reactor 3, the second chemical heat accumulation reactor 4, the condenser 6 and the water tank 8 through pipes to form a loop; the first chemical heat storage reactor 3, the second chemical heat storage reactor 4, the fin heat exchanger 2, the dehumidifier 7, the evaporator 5, the condenser 6, and the water tank 8 are connected by pipes to form a loop; the first chemical heat storage reactor 3 and the second chemical heat storage reactor 4 are respectively charged with chemical heat storage materials of different heat storage temperatures, the first chemical heat storage reactor is a low-temperature chemical heat storage reactor, and the second chemical heat storage reactor is a high-temperature chemical heat storage reactor.

As an alternative embodiment, in some embodiments, the chemical heat storage materials with different heat storage temperatures are calcium chloride and lithium hydroxide.

A solar chemical heat storage dehumidification working method is used for the solar chemical heat storage dehumidification system and comprises a first working mode, a second working mode, a third working mode and a fourth working mode.

The first operation mode is used for a daytime dehumidification and heat storage process, and includes: the valve 1 and the valve 2 are opened, when the solar heat collector 1 works, a part of hot water generated by the solar heat collector 1 exchanges air regeneration for the air duct 9 through the fin heat exchanger 2, a regeneration heat source in a dehumidification process is provided, and then the hot water flows back to the water tank 8 to perform the dehumidification process. Meanwhile, in the dehumidification process, the valve 3, the valve 4, the valve 6, the valve 8 and the valve 9 are opened, the other part of hot water generated by the solar heat collector 1 flows through the first chemical heat accumulation reactor 3 and the second chemical heat accumulation reactor 4 respectively and is subjected to decomposition reaction inside the first chemical heat accumulation reactor and the second chemical heat accumulation reactor, the steam generated by the decomposition reaction enters the condenser 6 to be condensed, the pressure in the chemical heat accumulation reactors is low, and the hot water flowing through the chemical heat accumulation reactors flows back to the water tank 8 to perform the chemical heat accumulation process.

The second working mode is used for the process of heat release and dehumidification at night or when the solar light is weaker than the set degree, and comprises the following steps: the valve 2, the valve 3 and the valve 5 are opened, the valve 5 between the evaporator 5 and the low-temperature chemical heat storage reactor is opened, evaporation is started in the evaporator 5, water vapor in the evaporator 5 enters the low-temperature chemical heat storage reactor to perform hydration and heat release reaction with a chemical heat storage material because the pressure in the chemical heat storage reactor is lower than the pressure in the evaporator 5, the generated hot water heats air channel 9 through the fin heat exchanger 2 to regenerate air, a dehumidification process regeneration heat source is provided, and hot water at the outlet of the fin heat exchanger 2 flows back to the water tank 8.

The third operating mode is for a temperature step heat storage dehumidification process, and includes: firstly, a low-temperature chemical heat accumulation reactor generates hydration exothermic reaction to provide a regeneration heat source in a dehumidification process; when the temperature of the hot water outlet of the chemical heat storage reactor cannot meet the dehumidification requirement, the chemical heat storage reactor filled with the high-decomposition-temperature chemical heat storage material generates hydration heat release reaction to provide a regeneration heat source in the dehumidification process, and meanwhile, hot water flowing through the fin heat exchanger 2 enters the low-temperature chemical heat storage reactor to perform the heat storage process; when the hot water outlet temperature of the high-temperature chemical heat accumulation reactor cannot meet the dehumidification requirement, the low-temperature chemical heat accumulation reactor generates hydration exothermic reaction to provide a regeneration heat source in the dehumidification process.

When hot water at the outlet of the low-temperature chemical heat storage reactor cannot meet the requirement of a dehumidification heat source, a valve 2, a valve 4, a valve 7, a valve 8 and a valve 9 are opened, the valve 5 is closed, the valve 9 between an evaporator 5 and a high-temperature chemical heat storage reactor is opened, the valve 8 between a condenser 6 and the low-temperature chemical heat storage reactor is opened, the valve 5 between the evaporator 5 and the low-temperature chemical heat storage reactor is closed, as the pressure in the evaporator 5 is greater than the pressure in the high-temperature chemical heat storage reactor, water vapor enters the high-temperature chemical heat storage reactor from the evaporator 5 to generate hydration exothermic reaction, the generated hot water passes through a fin heat exchanger 2 to heat air channel 9 to regenerate air, a dehumidification process regeneration heat source is provided, hot water at the outlet of the fin heat exchanger 2 flows back to a water tank, then enters the low-temperature chemical heat storage reactor from the water tank, the low-temperature chemical heat accumulation reactor carries out decomposition reaction, the generated steam enters the condenser 6 for condensation, and the low-temperature chemical heat accumulation reactor carries out the heat accumulation process again. When hot water at the outlet of the high-temperature chemical heat accumulation reactor cannot meet the requirement of a dehumidification heat source, a valve 5, a valve 8 and a valve 9 are opened, a valve 3 between an evaporator 5 and the low-temperature chemical heat accumulation reactor is opened, the valve 9 between the evaporator 5 and the high-temperature chemical heat accumulation reactor and the valve 8 between a condenser 6 and the low-temperature chemical heat accumulation reactor are closed, water vapor enters the low-temperature chemical heat accumulation reactor from the evaporator 5 to generate hydration exothermic reaction due to pressure difference between the evaporator 5 and the low-temperature chemical heat accumulation reactor, the generated hot water heats an air channel 9 through a fin heat exchanger 2 to regenerate air, and a regeneration heat source of a dehumidifier 7 is provided.

The fourth mode of operation is for a condensation heat recovery process, comprising: when the condenser 6 starts to work, a valve 10 between the condenser 6 and the fin heat exchanger 2 is opened, and the condensation heat generated in the condensation process preheats an air duct 9 to regenerate air and recycle the condensation heat.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.