Air conditioning unit and marine air conditioning system
By adopting multi-stage refrigeration and dehumidification technology in air-conditioning units and using multi-stage evaporators and condensers to replace the regeneration of the rotor, the poor energy efficiency and safety hazards caused by the long-term opening of the rotor in the prior art are solved, and a safer, more reliable and efficient air treatment effect is achieved.
Patent Information
- Application Number
- CN202421640301.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The existing air-conditioning units and marine air-conditioning systems rely on the rotor dehumidifier, resulting in long-term opening of the rotor, large electricity and reheat consumption and unsafe, and there are problems of poor energy efficiency and low reliability.
Design a multi-stage refrigeration and dehumidification air conditioning unit, adopt multi-stage evaporator and condenser instead of wheel regeneration, and use functional heat exchangers and heat recovery heat exchangers to achieve dehumidification and heat recovery in the refrigeration state, avoiding long-term opening of the wheel and electric reheating.
It improves the safety and reliability of the air conditioning unit, reduces energy consumption, avoids the safety hazards caused by the long-term opening of the rotor, and achieves more efficient air treatment.
Smart Images
Figure CN222756767U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air-conditioning units, in particular to a multi-stage refrigeration and dehumidification air-conditioning unit and a marine air-conditioning system. Background Art
[0002] The large-scale use of fresh air dehumidification units in the shipping industry began in the early 21st century. Due to the technical limitations at the time, the market generally adopted a combination of rotary dehumidifier + refrigerator + electric heating device. The principle is that the rotary dehumidifier provides dehumidification capacity, the refrigerator provides summer cooling capacity, and the electric heating device provides winter heating capacity.
[0003] The main working part of the rotary dehumidifier is a rotor made of special materials (such as ceramic materials, glass fiber, etc.). The rotor is divided into two main areas: adsorption area and regeneration area. When the humid air to be dehumidified passes through the adsorption area of the rotor, the water vapor in the air is adsorbed by the hygroscopic medium on the surface of the rotor. In this process, the water vapor undergoes a phase change and releases latent heat, making the treated air drier and warmer due to the reduction of its own moisture and the release of latent heat, thereby achieving the dehumidification effect. The slowly rotating rotor carries the saturated water vapor into the regeneration area. In the regeneration area, another air (usually high-temperature air) is first heated to a certain temperature (generally 100-140°C) by the regeneration heater, and then passes through the saturated rotor after moisture absorption. The high-temperature air causes the moisture adsorbed in the rotor to be desorbed (i.e. evaporated), thereby achieving the regeneration of the rotor. The evaporated moisture mixes with the high-temperature air to form humid air, which is then discharged outdoors through the regeneration fan.
[0004] For traditional units, since they rely on rotary dehumidifiers to achieve dehumidification function, the rotary dehumidifiers are in the on state for a long time, and the regeneration heaters are continuously heating, consuming a large amount of electricity and posing safety hazards, resulting in poor energy efficiency and low reliability of the entire unit.
[0005] Therefore, how to design safer and more reliable air-conditioning units and marine air-conditioning systems is a technical problem that needs to be solved urgently in the industry. Utility Model Content
[0006] In order to solve the defects of existing units that require the long-term operation of the rotor and electric reheat, resulting in high energy consumption and unsafe, the utility model proposes a multi-stage refrigeration and dehumidification air-conditioning unit and a marine air-conditioning system. In the refrigeration state, the air-conditioning unit can use a multi-stage evaporator and condenser to replace the rotor regeneration, without the need to turn on the rotor and electric reheat for a long time, and is safer and more reliable to use.
[0007] The technical solution adopted by the utility model is to design an air-conditioning unit, including: an air supply channel, in which are installed a rotary dehumidifier adsorption zone distributed in sequence along the air flow direction, at least two stages of functional heat exchangers, and a heat recovery heat exchanger, and the functional heat exchanger and the heat recovery heat exchanger are both connected to the refrigerant circulation loop; wherein, when the refrigerant circulation loop is in a cooling state, the functional heat exchangers at all stages are turned on, and the functional heat exchangers serve as evaporators, and the heat recovery heat exchangers serve as condensers.
[0008] Furthermore, the air-conditioning unit also includes: an external unit heat exchange channel separated from the air supply channel, the external unit heat exchange channel is equipped with an external unit heat exchange component, and the external unit heat exchange component is also connected to the refrigerant circulation loop; wherein, when the refrigerant circulation loop is in the heating state, the functional heat exchanger is selectively turned on, the heat recovery heat exchanger is turned off, and the turned-on functional heat exchanger serves as a condenser and the external unit heat exchange component serves as an evaporator.
[0009] Furthermore, the air conditioning unit also includes: a regeneration channel separated from the air supply channel, and a regeneration heater and a rotary dehumidifier regeneration zone are installed in the regeneration channel and are distributed in sequence along the air flow direction.
[0010] Furthermore, a fresh air filter and a return air filter are installed in the air supply channel. The fresh air filter is located on the air inlet side of the adsorption zone of the rotary dehumidifier, and the return air filter is located on the air outlet side of the adsorption zone of the rotary dehumidifier. Among them, outdoor fresh air flows into the air supply channel from the air inlet side of the adsorption zone of the rotary dehumidifier, and indoor return air flows into the air supply channel from the air outlet side of the adsorption zone of the rotary dehumidifier.
[0011] Furthermore, an electric heating device is installed in the air supply channel, and when the electric heating device is turned on, the air flow passing through is heated.
[0012] Furthermore, temperature and humidity sensors are installed on the air outlet side of the functional heat exchanger and the air outlet side of the heat recovery heat exchanger.
[0013] Furthermore, a two-stage functional heat exchanger is installed in the air supply channel.
[0014] The utility model also provides a marine air-conditioning system, comprising the above-mentioned air-conditioning unit.
[0015] Furthermore, the marine air conditioning system also includes: a controller, and a plurality of temperature and humidity sensors distributed in different areas of the cabin, the controller receives detection data from each temperature and humidity sensor, and the air conditioning unit is controlled by the controller.
[0016] Furthermore, the cabin is provided with an air supply end and an air return end connected to the air-conditioning unit. The air supply end is located at the top of the cabin, and the return air end is located at the bottom of the cabin. The cabin is divided into multiple temperature control layers from top to bottom, and each temperature control layer is installed with at least one temperature and humidity sensor.
[0017] Compared with the prior art, the present invention has at least one of the following beneficial effects:
[0018] 1. The air supply channel is designed with at least two-stage functional heat exchangers and heat recovery heat exchangers. The functional heat exchangers and heat recovery heat exchangers are connected to the refrigerant circulation loop. In the cooling state, the functional heat exchanger acts as an evaporator and the heat recovery heat exchanger acts as a condenser. Multi-stage refrigeration dehumidification and condensation heat recovery and heating are used to replace the conversion dehumidification of the existing technology. There is no need to open the rotor and regenerative heating for a long time, which effectively improves the safety and reliability of the air-conditioning unit;
[0019] 2. The outdoor heat exchange channel is equipped with an outdoor heat exchange component, which is also connected to the refrigerant circulation loop. In the heating state, at least one functional heat exchanger is turned on as a condenser and the outdoor heat exchange component is turned on as an evaporator. The condenser is used to replace the electric heating device in the existing technology to provide heat, making the air conditioning unit more energy-saving and reliable.
[0020] 3. Temperature and humidity sensors are installed on the air outlet side of each stage of heat exchanger. The data fed back by the temperature and humidity sensors can realize multi-stage segmented control and achieve precise control of temperature and humidity;
[0021] 4. Temperature and humidity sensors are arranged in different areas of the cabin. The controller can adjust the working status of the unit in time according to changes in on-site working conditions to improve the operating effect of the unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The present invention is described in detail below with reference to the embodiments and drawings, wherein:
[0023] Figure 1 It is a cross-sectional schematic diagram of the air conditioning unit of the utility model;
[0024] Figure 2 It is a schematic diagram of the air processing flow of the air conditioning unit of the utility model;
[0025] Figure 3 It is a cabin control schematic diagram of the marine air conditioning system of the utility model;
[0026] Description of the drawings: 1. Chassis; 2. Air supply channel; 21. Fresh air inlet; 22. Return air inlet; 3. Compressor; 4. Rotary dehumidifier; 5. Functional heat exchanger; 6. Heat recovery heat exchanger; 7. Air supply fan; 8. External unit heat exchange channel; 81. Condensation air outlet; 9. External unit heat exchange component; 10. Regeneration channel; 11 Regeneration fan; 12. Regeneration air outlet; 13. Fresh air filter; 14. Return air filter; 15. Electric heating device; 16. Air supply end; 17. Return air end; 18. Temperature and humidity sensor; 100. Air conditioning unit; 200. Cabin. DETAILED DESCRIPTION
[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0028] The air conditioning unit proposed in the utility model comprises: a chassis and a plurality of components installed in the chassis, wherein the components include a compressor, a heat exchanger and a fan, etc. The structure of the unit is described in detail below in combination with different embodiments.
[0029] like Figure 1 , 2 As shown, the chassis 1 is divided into an air supply channel 2, in which the adsorption area of the rotary dehumidifier 4 distributed in sequence along the air flow direction, at least two stages of functional heat exchangers 5, and a heat recovery heat exchanger 6 are installed. The air supply channel 2 is provided with a blower 7 for driving the air flow. The functional heat exchanger 5 and the heat recovery heat exchanger 6 are both connected to the refrigerant circulation loop, and the functional heat exchangers of each stage are arranged in parallel and can work independently to participate in the refrigerant circulation.
[0030] Specifically, the refrigerant circulation loop includes a compressor 3, a throttling element, at least two-stage functional heat exchangers 5 arranged in parallel, and a heat recovery heat exchanger 6. The throttling element can be an electronic expansion valve. When the refrigerant circulation loop is in a refrigeration state, the functional heat exchanger 5 acts as an evaporator and the heat recovery heat exchanger 6 acts as a condenser. The refrigerant flows in the direction that the high-temperature refrigerant discharged from the compressor 3 enters the heat recovery heat exchanger 6 for condensation and cooling, passes through the throttling element, is sent to the functional heat exchanger 5 for heat absorption and evaporation, and then returns to the compressor 3.
[0031] When the refrigerant circulation loop is in the cooling state, the functional heat exchangers 5 at all levels are turned on, and the air flow direction is that after the air flow passes through the functional heat exchangers 5 at all levels for step-by-step cooling and dehumidification, the temperature will be significantly lower than the use requirements, and the low-temperature air flow is then sent to the single-stage heat recovery heat exchanger 6 for condensation heat recovery and heating treatment, so that the temperature of the air flow sent into the room meets the use requirements, which can not only ensure comfort but also prevent condensation in the room.
[0032] The utility model designs at least two-stage functional heat exchangers 5 and a heat recovery heat exchanger 6 in the air supply channel 2. In the cooling state, multi-stage refrigeration dehumidification and condensation heat recovery and heating are used to replace the conversion dehumidification of the existing technology. There is no need to open the wheel and regenerative heating for a long time, which effectively improves the safety and reliability of the air-conditioning unit.
[0033] It should be understood that a two-stage evaporator can achieve a good dehumidification effect. Although an evaporator with a larger number of stages can improve the dehumidification effect to a certain extent, the wind resistance of the airflow passing through all evaporators is too large, which is not conducive to air supply. Therefore, the preferred solution is to install a two-stage functional heat exchanger 5 in the air supply channel.
[0034] In addition, in the utility model, although the air supply channel 2 is equipped with a rotary dehumidifier 4, the function of the rotary dehumidifier 4 is standby dehumidification, that is, the rotary dehumidifier 4 is usually not turned on. Under special working conditions, the rotary dehumidifier 4 is turned on for dehumidification to ensure that the indoor humidity meets the use requirements. The special working conditions here can be designed according to actual conditions. For example, when the indoor humidity or the air supply humidity of the air supply channel is higher than the set safety humidity, the rotary dehumidifier 4 is turned on for dehumidification. The set safety humidity can be taken as 70%, etc., and the utility model does not impose special restrictions on this. For another example, in the cooling state, if the opening of the compressor 3 and the electronic expansion valve is adjusted to the most unfavorable situation, the indoor humidity still cannot meet the use requirements, then the rotary dehumidifier 4 is turned on for dehumidification. For another example, in the heating state, if the indoor humidity cannot meet the use requirements, then the rotary dehumidifier 4 is turned on for dehumidification.
[0035] Based on the fact that the unit has the above-mentioned air supply channel 2, in some embodiments, the chassis 1 is also divided to form an external unit heat exchange channel 8, and the external unit heat exchange channel 8 is installed with an external unit heat exchange component 9. The external unit heat exchange component 9 includes an external unit heat exchanger and an external fan for driving the airflow. The external unit heat exchanger is also connected to the refrigerant circulation loop, and the external unit heat exchanger is arranged in parallel with the heat recovery heat exchanger 6. The external unit heat exchanger and the heat recovery heat exchanger 6 can work independently to participate in the refrigerant circulation.
[0036] Specifically, the refrigerant circulation loop includes a compressor 3, a throttling element, at least two-stage functional heat exchangers 5 arranged in parallel, and a heat recovery heat exchanger 6 and an outdoor heat exchange component 9 arranged in parallel. When the refrigerant circulation loop is in the heating state, the functional heat exchanger 5 is selectively turned on, and the heat recovery heat exchanger 6 is turned off. The turned-on functional heat exchanger 5 serves as a condenser and the outdoor heat exchange component 9 serves as an evaporator. The refrigerant flow direction is that the high-temperature refrigerant discharged from the compressor 3 enters the turned-on functional heat exchanger 5 for condensation and cooling, passes through the throttling element, is sent to the outdoor heat exchange component 9 for heat absorption and evaporation, and then returns to the compressor 3.
[0037] When the refrigerant circulation loop is in the heating state, the number of functional heat exchangers 5 to be opened is selected according to the heating demand, and the heat recovery heat exchanger 6 is closed. The air flow direction is that the air flow passes through the opened functional heat exchanger 5 for heating, and the hot air flow passes through the closed heat recovery heat exchanger 6 and is finally delivered to the room.
[0038] The utility model designs an outdoor heat exchange channel 8 and an outdoor heat exchange component 9. In the heating state, at least one functional heat exchanger 5 is turned on as a condenser and the outdoor heat exchange component 9 is turned on as an evaporator. The condenser is used to replace the electric heating device in the prior art to provide heat, making the air-conditioning unit more energy-saving and reliable.
[0039] It should be understood that a good heating effect can be achieved by turning on the first-stage functional heat exchanger 5 as a condenser. When the indoor heat demand is large or the outdoor ambient temperature is low, you can choose to turn on more than two stages of functional heat exchangers 5 as condensers to increase the heat supply.
[0040] In addition, in some embodiments, the air supply channel 2 is also equipped with an electric heating device 15, which heats the air flow passing through when turned on. The electric heating device 15 can be installed on the air outlet side of the heat recovery heat exchanger 6, and the utility model does not impose any special restrictions on this.
[0041] The function of the electric heating device 15 is standby heating, that is, the electric heating device 15 is usually not turned on. Under special working conditions, the electric heating device 15 is turned on for heating to ensure that the indoor temperature meets the use requirements. The special working conditions here can be designed according to actual conditions. For example, in the heating state, if the opening of the compressor 3 and the electronic expansion valve is adjusted to the most unfavorable condition, and the indoor temperature still cannot meet the use requirements, the electric heating device 15 is turned on for heating.
[0042] Based on the above-mentioned air supply channel 2 of the unit, in some embodiments, the chassis 1 is further divided to form a regeneration channel 10, in which regeneration heaters and the regeneration area of the rotary dehumidifier 4 are installed in sequence along the airflow direction, and a regeneration fan 11 for driving the airflow is arranged in the regeneration channel 10. After the rotary dehumidifier 4 is turned on, the regeneration fan 11 drives the regeneration air to pass through the regeneration heater into the regeneration area of the rotary dehumidifier 4, and then discharges the regeneration channel 10.
[0043] The utility model separates the regeneration channel 10 and the air supply channel 2 to avoid mutual interference of airflows and improve the air handling efficiency of the unit. In addition, in the embodiment in which the air supply channel 2, the external heat exchange channel 8 and the regeneration channel 10 are designed at the same time, the air supply channel 2, the external heat exchange channel 8 and the regeneration channel 10 are all separated.
[0044] In order to optimize the indoor environmental quality, in some embodiments, a fresh air filter 13 and a return air filter 14 are also installed in the air supply channel 2. The fresh air filter 13 is located on the air inlet side of the adsorption zone of the rotary dehumidifier 4, and the return air filter 14 is located on the air outlet side of the adsorption zone of the rotary dehumidifier 4.
[0045] Specifically, the air supply channel 2 is provided with a fresh air inlet 21, a return air inlet 22 and an air supply inlet. The functions of the fresh air inlet 21 and the return air inlet 22 are to introduce the air flow into the air supply channel 2, and the function of the air supply inlet is to deliver the processed air flow in the air supply channel 2 to the indoor room. The fresh air inlet 21 is located on the air inlet side of the adsorption zone of the rotary dehumidifier 4, and the return air inlet 22 is located on the air outlet side of the adsorption zone of the rotary dehumidifier 4. The outdoor fresh air flows into the air supply channel from the air inlet side of the adsorption zone of the rotary dehumidifier 4, and the indoor return air flows into the air supply channel 2 from the air outlet side of the adsorption zone of the rotary dehumidifier 4.
[0046] The advantage of this design is that since the temperature, humidity and cleanliness of the indoor return air are better than those of the outdoor fresh air, the fresh air and the return air are introduced into the air supply channel 2 separately, which prolongs the service life of the filter and reduces the dehumidification load after the rotary dehumidifier 4 is turned on.
[0047] For application scenarios such as ships or coastal areas, the fresh air filter 13 includes a primary filter, a desalination mist filter, and a chemical filter. The return air filter 14 includes a primary filter and a chemical filter. The primary filter is mainly responsible for filtering coarse particles and dust in the air to protect the components in the air supply channel from being blocked. The salt mist filter effectively blocks humid air containing salt from entering the components in the air supply channel to prevent salt mist from corroding and damaging the components. The chemical filter uses chemical filter materials and catalysts to effectively adsorb and decompose molecular-level pollutants (such as sulfides, nitrogen oxides, etc.) in the air, thereby removing harmful gases and purifying the air delivered to the room.
[0048] For ease of understanding, an application example of the present invention is used for explanation. The air supply channel 2, the external heat exchange channel 8 and the regeneration channel 10 all take in air from the side. The air inlet of the air supply channel 2 is the fresh air inlet 21 and the return air inlet 22. The air inlet of the external heat exchange channel 8 is the condensation air inlet 81. The air inlet of the regeneration channel 10 is the regeneration air inlet 12. Figure 1 It is a cross-sectional schematic diagram of the unit. The above-mentioned air outlet is located on the side not shown, so the fresh air outlet 21, the return air outlet 22, the condensation air outlet 81, and the regeneration air outlet 12 are represented by dotted lines. The order of components installed in the air supply channel 2 is the fresh air filter 13, the adsorption area of the rotary dehumidifier 4, the return air filter 14, the two-stage functional heat exchanger 5, the single-stage heat recovery heat exchanger 6, the electric heating device 15, and the air supply fan 7. A water receiving pan is provided below the functional heat exchanger 5 and the heat recovery heat exchanger 6.
[0049] like Figure 2As shown, in this application example, the air treatment process of the air supply channel in the summer cooling state is as follows: outdoor fresh air enters the air supply channel 2 from the fresh air inlet 21, passes through the fresh air filter 13, passes through the rotary dehumidifier 4 and is mixed with the return air sent in from the return air inlet 22, the mixed air flow is cooled and dehumidified by the two-stage functional heat exchanger 5, and then passes through the single-stage heat recovery heat exchanger 6 to absorb heat and heat up, the treated air passes through the electric heating device 15, and is sent into the cabin by the air supply fan 7.
[0050] like Figure 2 As shown, in this application example, the air treatment process of the air supply channel in the winter heating state is as follows: outdoor fresh air enters the air supply channel from the fresh air inlet 21, passes through the fresh air filter 13, passes through the rotary dehumidifier 4 and mixes with the return air sent in from the return air inlet, the mixed air flow passes through the primary functional heat exchanger 5 to absorb heat and heat up, the treated air passes through the heat recovery heat exchanger 6 and the electric heating device 15, and is sent into the cabin through the air supply fan 7.
[0051] In order to improve the control accuracy of the unit, in some embodiments, temperature and humidity sensors are installed on the air outlet side of the functional heat exchanger 5 and the air outlet side of the heat recovery heat exchanger 6. The advantage of this design is that the temperature and humidity sensors on the air outlet side of each stage of the heat exchanger can provide real-time feedback on the air processing situation, and the data fed back by the temperature and humidity sensors can realize multi-stage segmented control and achieve precise control of temperature and humidity.
[0052] like Figure 3 As shown, the utility model also proposes a marine air-conditioning system, including the above-mentioned air-conditioning unit 100. The air-conditioning unit 100 uses multi-stage refrigeration dehumidification and condensation heat recovery heating to replace the conversion dehumidification of the existing technology in the refrigeration state, without the need to open the wheel and regenerative heating for a long time, thereby ensuring the safety and reliability of the ship transportation process.
[0053] In some embodiments, the marine air conditioning system further includes: a controller, and a plurality of temperature and humidity sensors 18 distributed in different areas of the cabin 200 , the controller receives detection data from each temperature and humidity sensor 18 , and the air conditioning unit 100 is controlled by the controller.
[0054] The advantage of this design is that the temperature and humidity sensors 18 in various areas of the cabin 200 can provide real-time feedback on the indoor environmental conditions, and the controller can adjust the working state of the unit in time according to changes in on-site working conditions, improve the unit's operating performance, and ensure comfort in the cabin.
[0055] For application scenarios with larger indoor spaces, the cabin 200 is provided with an air supply terminal 16 and an air return terminal 17 connected to the air-conditioning unit 100. The air supply terminal 16 is located at the top of the cabin 200, and the return air terminal 17 is located at the bottom of the cabin 200. The cabin 200 is divided into multiple temperature control layers from top to bottom, and each temperature control layer is installed with at least one temperature and humidity sensor 18.
[0056] The advantage of this design is that the air flow in the cabin flows from the air supply end 16 to the return air end 17, and the temperature and humidity will gradually change. Reasonable division of the levels of the cabin's internal space and the installation of temperature and humidity sensors are conducive to layered control of temperature and humidity, and timely adjustment of the unit's working status, so that the temperature and humidity of the entire cabin 200 can meet the use requirements.
[0057] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. The order of execution of actions, steps, etc. in the devices and methods shown in the specification and the accompanying drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar sequential terms used for the convenience of description do not mean that they must be implemented in such an order.
[0058] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.
[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An air conditioning unit, characterized in that: include: An air supply channel, wherein the air supply channel is provided with a rotary dehumidifier adsorption zone, at least two-stage functional heat exchangers, and a heat recovery heat exchanger which are sequentially distributed along the air flow direction, and the functional heat exchangers and the heat recovery heat exchangers are both connected to a refrigerant circulation loop; Wherein, when the refrigerant circulation loop is in a cooling state, the functional heat exchangers at each level are all turned on, and the functional heat exchangers serve as evaporators and the heat recovery heat exchangers serve as condensers.
2. The air conditioning unit according to claim 1, characterized in that: Also includes: An external heat exchange channel separated from the air supply channel, wherein the external heat exchange channel is equipped with an external heat exchange component, and the external heat exchange component is also connected to the refrigerant circulation loop; Wherein, when the refrigerant circulation loop is in a heating state, the functional heat exchanger is selectively turned on, the heat recovery heat exchanger is turned off, and the turned-on functional heat exchanger serves as a condenser and the external unit heat exchange component serves as an evaporator.
3. The air conditioning unit according to claim 1, characterized in that: Also includes: A regeneration channel is separated from the air supply channel, and a regeneration heater and a rotary dehumidifier regeneration zone are installed in the regeneration channel. The regeneration channel is sequentially distributed along the air flow direction.
4. The air conditioning unit according to claim 1, characterized in that: A fresh air filter and a return air filter are also installed in the air supply channel, the fresh air filter is located on the air inlet side of the adsorption zone of the rotary dehumidifier, and the return air filter is located on the air outlet side of the adsorption zone of the rotary dehumidifier; Among them, outdoor fresh air flows into the air supply channel from the air inlet side of the adsorption zone of the rotary dehumidifier, and indoor return air flows into the air supply channel from the air outlet side of the adsorption zone of the rotary dehumidifier.
5. The air conditioning unit according to claim 1, characterized in that: An electric heating device is also installed in the air supply channel, and when the electric heating device is turned on, it heats the air flow passing through.
6. The air conditioning unit according to claim 1, characterized in that: Temperature and humidity sensors are installed on the air outlet side of the functional heat exchanger and the air outlet side of the heat recovery heat exchanger.
7. The air conditioning unit according to any one of claims 1 to 6, characterized in that: A two-stage functional heat exchanger is installed in the air supply channel.
8. Marine air conditioning system, characterized in that: An air conditioning unit comprising any one of claims 1 to 7.
9. The marine air conditioning system according to claim 8, characterized in that: Also includes: A controller and a plurality of temperature and humidity sensors distributed in different areas of the cabin, the controller receives detection data from each of the temperature and humidity sensors, and the air conditioning unit is controlled by the controller.
10. The marine air conditioning system according to claim 9, characterized in that: The cabin is provided with an air supply end and an air return end connected to the air conditioning unit, the air supply end is located at the top of the cabin, and the return air end is located at the bottom of the cabin. The cabin is divided into multiple temperature control layers from top to bottom, and each temperature control layer is installed with at least one temperature and humidity sensor.