Air mixing type two-stage rotating wheel dehumidification air conditioning unit

Abstract

The utility model discloses an air mixing type two-stage rotating wheel dehumidification air conditioning unit, and relates to the technical field of air conditioners. Wherein the first dehumidification rotating wheel is provided with a first dehumidification channel and a first regeneration channel, and the first dehumidification rotating wheel is a low-temperature regeneration rotating wheel; the second dehumidification rotating wheel is provided with a second dehumidification channel and a second regeneration channel; the fresh air channel, the first dehumidification channel, the second dehumidification channel and the air supply channel are sequentially communicated through a pipeline; the outlet end of the regeneration air channel, the second regeneration channel, the first regeneration channel and the exhaust channel are sequentially communicated through pipelines, and the inlet end of the regeneration air channel and the outlet end of the air return channel are connected to the pipeline between the first dehumidification channel and the second dehumidification channel; the temperature adjusting device is arranged in the air supply channel; the heat pump system comprises a condenser; the electric heater and the condenser are arranged in the regeneration air channel, and the electric heater is located between the condenser and the second regeneration channel. The utility model can reduce the consumption of electric energy, improve the energy recovery utilization rate, and achieve the purposes of energy conservation and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a two-stage rotary dehumidifier air conditioning unit with mixed airflow. Background Technology

[0002] Rotary dehumidifier technology is widely used due to its advantages such as large dehumidification capacity, strong dehumidification ability, and environmental friendliness. However, in some places with deep dehumidification requirements, a single rotary dehumidifier system cannot achieve the required dehumidification effect. Therefore, a two-stage rotary dehumidifier system is often used for secondary dehumidification treatment.

[0003] However, in existing two-stage rotary dehumidifier air conditioning units, the regeneration temperature of the dehumidifier rotors is high, resulting in large energy consumption and low energy utilization, which does not conform to the concept of energy conservation and environmental protection. Specifically, each dehumidifier rotor needs to be equipped with an electric heater to provide sufficient regeneration heat so that the dehumidifier rotor can restore its original adsorption and dehumidification capacity, which leads to very high power consumption. Furthermore, using outdoor fresh air as regeneration air to sequentially regenerate the two dehumidifier rotors results in high humidity content and weak regeneration capacity of outdoor fresh air, which further increases the power consumption of the electric heaters, leading to very high operating costs.

[0004] Therefore, the existing two-stage rotary dehumidifier air conditioning units need further improvement. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a two-stage rotary dehumidifier air conditioning unit with mixed airflow, which can reduce power consumption, improve energy recovery and utilization rate, and achieve the goal of energy conservation and environmental protection.

[0006] This utility model embodiment provides a two-stage rotary dehumidifier air conditioning unit of the mixed air type, which includes:

[0007] The first dehumidification rotor has a first dehumidification channel and a first regeneration channel, and the first dehumidification rotor is configured as a low-temperature regeneration rotor.

[0008] The second dehumidification impeller has a second dehumidification channel and a second regeneration channel;

[0009] Fresh air duct;

[0010] The air supply duct, the fresh air duct, the first dehumidification duct, the second dehumidification duct and the air supply duct are connected in sequence by pipelines;

[0011] A temperature control device is located within the air supply channel;

[0012] Return air duct;

[0013] Exhaust duct;

[0014] The regenerated air duct, its outlet end, the second regenerated duct, the first regenerated duct and the exhaust duct are connected in sequence by a pipeline, and the inlet end of the regenerated air duct and the outlet end of the return air duct are both connected to the pipeline between the first dehumidification duct and the second dehumidification duct.

[0015] A heat pump system, which includes a condenser;

[0016] An electric heater and the condenser are disposed within the regeneration air duct, with the electric heater located between the condenser and the second regeneration duct.

[0017] The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to the embodiments of this utility model has at least the following beneficial effects: Since the first dehumidifier rotor is a low-temperature regeneration rotor with a low regeneration temperature, and the temperature of the regeneration air flowing out from the second regeneration channel meets the inlet air temperature requirements of the first regeneration channel, the regeneration air flowing out from the second dehumidifier rotor can be directly used to heat and regenerate the first dehumidifier rotor, eliminating the need for a separate electric heater for the first dehumidifier rotor. This saves the electric heating energy required for the regeneration process of the first dehumidifier rotor. Simultaneously, since the regeneration temperature of the second dehumidifier rotor is high, the heat dissipated by the condenser in the heat pump system is first used to preheat the regeneration air of the second dehumidifier rotor, and then the electric heater is used for secondary heating of the regeneration air of the second dehumidifier rotor. This fully utilizes air energy, improves energy efficiency, and reduces the energy consumption of the electric heater, thereby achieving the goal of energy conservation and environmental protection.

[0018] Furthermore, the air flowing out from the first dehumidification channel and the return air flowing out from the return air channel are mixed to form mixed air. Part of the mixed air is heated to become high-temperature, low-humidity air, which is used as regeneration air. The regeneration air has low moisture content and strong regeneration capacity, which makes the mixed-air type two-stage rotary dehumidification air conditioning unit have stronger dehumidification capacity, reduces the supply air humidity, and helps to expand the application range of the mixed-air type two-stage rotary dehumidification air conditioning unit.

[0019] In some embodiments of this utility model, the heat pump system further includes an evaporator, which is disposed on the pipeline between the first dehumidification channel and the second dehumidification channel. The inlet end of the regeneration air channel and the outlet end of the return air channel are both located on the side of the evaporator away from the second dehumidification channel.

[0020] In some embodiments of this utility model, the mixed-air type two-stage rotary dehumidifier air conditioning unit further includes a second precooler, which is disposed on the pipeline between the first dehumidification channel and the second dehumidification channel. The evaporator is located between the second precooler and the second dehumidification channel. The inlet end of the regeneration air channel and the outlet end of the return air channel are both located on the side of the second precooler away from the second dehumidification channel.

[0021] In some embodiments of this utility model, the mixed-air type two-stage rotary dehumidifier air conditioning unit further includes a first precooler, which is disposed in the fresh air duct.

[0022] In some embodiments of this utility model, the temperature regulating device includes a cooler and a heater, which are disposed within the air supply channel.

[0023] In some embodiments of this utility model, the first precooler, the second precooler, and the cooler all have a cold flow channel for connecting to a centralized cold source.

[0024] In some embodiments of this utility model, air filters are provided in the pipelines between the inlet end of the fresh air duct, the outlet end of the air supply duct, the outlet end of the return air duct, and the second precooler.

[0025] In some embodiments of this utility model, fans are provided in the exhaust channel, the pipeline between the first dehumidification channel and the second dehumidification channel, and the pipeline between the first regeneration channel and the second regeneration channel.

[0026] In some embodiments of this utility model, the outlet end of the return air duct is located between the inlet end of the regenerated air duct and the first dehumidification duct.

[0027] In some embodiments of this utility model, the pipeline between the first regeneration channel and the second regeneration channel is provided with a fresh air supply inlet, and the fresh air supply inlet is provided with a flow regulating valve.

[0028] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of a two-stage rotary dehumidifier air conditioning unit of the mixed air type provided according to an embodiment of the present utility model.

[0030] Reference numerals in the attached drawings: 1. First filter; 2. First precooler; 3. First dehumidifying impeller; 4. First fan; 5. First branch; 6. Second branch; 7. Second filter; 8. Second precooler; 9. Evaporator; 10. Second dehumidifying impeller; 11. Cooler; 12. Heater; 13. Third filter; 14. Compressor; 15. Condenser; 16. Electric heater; 17. Second fan; 18. Third fan. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The following is for reference. Figure 1 This invention describes a two-stage rotary dehumidifier air conditioning unit of the mixed air type provided in an embodiment of the present invention.

[0035] like Figure 1 As shown, the mixed-air type two-stage rotary dehumidifier air conditioning unit according to the embodiment of this utility model has the advantages of strong dehumidification capacity, low power consumption, high energy recovery and utilization rate, and energy saving and environmental protection, and can be used in places that require deep dehumidification.

[0036] The mixed-air type two-stage rotary dehumidifier air conditioning unit includes a two-stage rotary dehumidifier system, an air duct system, a heat pump system, an electric heater 16, and a temperature control device.

[0037] The two-stage rotary dehumidification system includes a first dehumidification rotor 3 and a second dehumidification rotor 10.

[0038] The first dehumidifying impeller 3 has a first dehumidification channel and a first regeneration channel, and is configured as a low-temperature regeneration impeller with a low regeneration temperature. The second dehumidifying impeller 10 has a second dehumidification channel and a second regeneration channel. The second dehumidifying impeller 10 has a higher regeneration temperature than the first dehumidifying impeller 3.

[0039] Understandably, both the first dehumidifying impeller 3 and the second dehumidifying impeller 10 are driven to rotate by a combination of a motor and a belt or chain. The first dehumidifying channel and the first regeneration channel are separated, as are the second dehumidifying channel and the second regeneration channel. The first dehumidifying impeller 3 can dehumidify the air located in the first dehumidifying channel, and the second dehumidifying impeller 10 can dehumidify the air located in the second dehumidifying channel. The first dehumidifying impeller 3 can complete desorption and regeneration by absorbing the heat of the regeneration air flowing through the first regeneration channel, thereby restoring its dehumidification capacity. Similarly, the second dehumidifying impeller 10 can perform desorption and regeneration by absorbing the regeneration air flowing into the second regeneration channel, thus restoring its dehumidification capacity to its original state.

[0040] The duct system includes fresh air ducts, supply air ducts, return air ducts, exhaust air ducts, and regenerated air ducts.

[0041] The fresh air duct, the first dehumidification duct, the second dehumidification duct, and the supply air duct are connected sequentially via ductwork. The fresh air duct has a fresh air inlet and a fresh air outlet, while the supply air duct has a supply air inlet and a supply air outlet. The fresh air inlet connects to the outdoor space, the fresh air outlet connects to one end of the first dehumidification duct via ductwork, the other end of the first dehumidification duct connects to one end of the second dehumidification duct via ductwork, the other end of the second dehumidification duct connects to the supply air inlet via ductwork, and the supply air outlet connects to the indoor space. The number of supply air outlets is not limited to one. Therefore, outdoor air can flow sequentially through the fresh air duct, the first dehumidification duct, the second dehumidification duct, and the supply air duct before entering the indoor space.

[0042] The outlet end of the regenerated air duct, the second regenerated duct, the first regenerated duct, and the exhaust duct are connected in sequence by pipes. Moreover, the inlet end of the regenerated air duct and the outlet end of the return air duct are both connected to the pipes between the first dehumidification duct and the second dehumidification duct. The inlet end of the return air duct is connected to the indoor space.

[0043] Understandably, the return air duct has more than one inlet. The outlet of the first dehumidification duct is connected to a first branch 5 and a second branch 6, allowing air flowing from the first dehumidification duct to flow to both branches. Air flowing through the first branch 5 enters the second dehumidification duct for secondary dehumidification, achieving the required indoor humidity level. Air flowing through the second branch 6 serves as regeneration air, sequentially entering the second and first regeneration ducts to regenerate the second dehumidification impeller 10 and the first dehumidification impeller 3. Indoor air flowing from the return air duct flows into the duct between the first and second dehumidification ducts to replenish the air volume entering the second dehumidification duct, ensuring the secondary dehumidified air meets the required indoor airflow.

[0044] In a two-stage rotary dehumidifier air conditioning unit with mixed airflow, a fan needs to be installed in the corresponding ductwork to drive the airflow within the ductwork. The location of the fan can be selected according to the actual situation and is not specifically limited here.

[0045] In one specific embodiment, fans are installed in the exhaust duct, the duct between the first dehumidification duct and the second dehumidification duct, and the duct between the first regeneration duct and the second regeneration duct.

[0046] Specifically, such as Figure 1 As shown, a first fan 4 is installed in the pipe between the first dehumidification channel and the second dehumidification channel. Driven by the first fan 4, outdoor air continuously flows into the first dehumidification channel and flows to the first branch 5 and the second branch 6 respectively. A second fan 17 is installed in the pipe between the second regeneration channel and the first regeneration channel. When the second fan 17 is running, air in the first branch 5 continuously flows into the second regeneration channel and then into the first regeneration channel. A third fan 18 is installed in the exhaust duct. When the third fan 18 is started, air flowing out of the second regeneration channel continuously flows into the first regeneration channel and is discharged to the outside through the exhaust duct.

[0047] The temperature control device is installed inside the air supply duct. Its function is to cool or heat the deeply dehumidified air within the duct to regulate its temperature and ensure it meets indoor temperature requirements. Specifically, the temperature control device includes a cooler 11 and a heater 12, both located within the air supply duct.

[0048] Understandably, in some examples, the cooler 11 is located on the side of the heater 12 closer to the air outlet. In other examples, the cooler 11 is located on the side of the heater 12 furthest from the air outlet, such as... Figure 1As shown. Cooler 11 cools the air to a set temperature. Heater 12 heats the air to a set temperature. The structures of cooler 11 and heater 12 are not limited; for example, they can be finned heat exchangers. The refrigerant in the cold flow channel of cooler 11 exchanges heat with the air in the air supply channel, and the heat transfer medium in the hot flow channel of heater 12 transfers heat to the air in the air supply channel.

[0049] The heat pump system is a direct expansion heat pump, comprising a condenser 15, an evaporator 9, a compressor 14, and a throttling device. The evaporator 9, compressor 14, condenser 15, and throttling device are sequentially connected in a closed loop via piping to form a refrigerant circuit. The throttling device can be a throttling valve or a capillary tube, etc.

[0050] Both the condenser 15 and the electric heater 16 are located within the regeneration air duct, capable of heating the regeneration air within the duct to ensure its temperature meets the inlet temperature requirements of the second regeneration channel. The electric heater 16 is positioned between the condenser 15 and the second regeneration channel. Therefore, the air within the regeneration air duct first flows through the condenser 15, absorbing the heat released by the condenser 15, thus preheating the air. Next, the preheated air flows through the electric heater 16, absorbing the heat emitted by the electric heater 16, further increasing the air temperature to meet the regeneration temperature requirements of the second dehumidifying impeller 10.

[0051] In some embodiments, such as Figure 1 As shown, the mixed-air type two-stage rotary dehumidifier air conditioning unit also includes a first precooler 2. The first precooler 2 is located in the fresh air duct. The first precooler 2 can precool the air in the fresh air duct to reduce the air temperature, thereby lowering the inlet air temperature of the first dehumidification duct and helping to improve the dehumidification capacity of the first dehumidifier rotor 3.

[0052] In some embodiments, such as Figure 1 As shown, the mixed-air type two-stage rotary dehumidifier air conditioning unit also includes a second precooler 8. The second precooler 8 is located on the pipeline between the first dehumidification channel and the second dehumidification channel, and the inlet end of the regeneration air channel and the outlet end of the return air channel are both located on the side of the second precooler 8 away from the second dehumidification channel.

[0053] Understandably, the function of the second precooler 8 is to precool the air flowing into the second dehumidification channel to lower its temperature, thereby reducing the inlet air temperature and improving the dehumidification capacity of the second dehumidification rotor 10. The inlet of the regeneration air channel is located between the second precooler 8 and the first dehumidification rotor 3. This prevents the temperature of the regeneration air from decreasing due to the action of the second precooler 8, allowing for full utilization of the heat carried by the regeneration air itself. This effectively reduces the heat required by the condenser 15 and the electric heater 16, thus lowering energy consumption.

[0054] Furthermore, such as Figure 1 As shown, the evaporator 9 in the heat pump system is located on the pipeline between the first dehumidification channel and the second dehumidification channel. Moreover, the evaporator 9 is located between the second precooler 8 and the second dehumidification channel. The inlet end of the regeneration air channel and the outlet end of the return air channel are both located on the side of the evaporator 9 away from the second dehumidification channel.

[0055] Understandably, the function of evaporator 9 is to perform secondary precooling on the air precooled by the second precooler 8, further reducing the air temperature. By effectively utilizing evaporator 9, it can cooperate with the second precooler 8 to form a two-stage precooling system, causing the inlet air temperature of the second dehumidification channel to drop further, thereby further improving the dehumidification capacity of the second dehumidification rotor 10, resulting in a further reduction in supply air humidity. This makes the mixed-air type two-stage rotor dehumidification air conditioning unit suitable for applications requiring lower humidity.

[0056] In this embodiment, the first precooler 2, the second precooler 8, and the cooler 11 are all coil-type heat exchangers, each with a cold flow channel that can be connected to a centralized cold source. It is understood that the centralized cold source can be medium-temperature chilled water with a supply / return temperature of 7°C / 12°C. Furthermore, the heater 12 is also a coil-type heat exchanger, and hot water can circulate within its hot flow channel.

[0057] Of course, it is not excluded that in other embodiments, only a second precooler 8 or only an evaporator 9 may be provided on the pipeline between the first dehumidification channel and the second dehumidification channel.

[0058] In some embodiments, air filters are installed in the pipes between the inlet of the fresh air duct, the outlet of the supply air duct, the outlet of the return air duct, and the second precooler 8. The air filters are capable of filtering impurities such as particles in the air.

[0059] Specifically, such as Figure 1As shown, a first filter 1 is installed at the inlet end of the fresh air duct. A first precooler 2 is located between the first filter 1 and the first dehumidification impeller 3. The first filter 1 filters the air, preventing the operation of the first precooler 2 and the first dehumidification impeller 3 from being affected by impurities in the air. A second filter 7 is installed in the duct between the first dehumidification duct and the second dehumidification duct. A second precooler 8 is located between the second filter 7 and the evaporator 9. The second filter 7 filters the air, preventing the operation of the second precooler 8, the evaporator 9, and the second dehumidification impeller 10 from being adversely affected by impurities in the air. A third filter 13 is installed in the air supply duct, located near the air supply outlet of the air supply duct. The third filter 13 filters the air, ensuring good air quality delivered to the indoor space.

[0060] The first filter 1 can be a pre-filter, the second filter 7 can be a medium-efficiency filter, and the third filter 13 can be a sub-high-efficiency filter or a high-efficiency filter.

[0061] In some embodiments, such as Figure 1 As shown, the outlet end of the return air duct is located between the inlet end of the regenerated air duct and the first dehumidification duct, and the second fan 17 is located between the inlet end of the regenerated air duct and the second precooler 8.

[0062] Understandably, the air flowing out of the return air duct (i.e., indoor return air) has a lower humidity than the air flowing out of the first dehumidification duct. By mixing the air flowing out of the first dehumidification duct with the indoor return air, the humidity of the mixed air is relatively low. Part of the mixed air flows to the second dehumidification duct, and the other part flows to the regeneration air duct.

[0063] Compared to directly using outdoor fresh air as regenerated air, this embodiment adopts the above-mentioned configuration, which allows the air flowing out from the first dehumidification channel to mix with the indoor return air, reducing the air humidity. Part of the mixed air flows to the regenerated air channel and, under the combined action of the condenser 15 and the electric heater 16, becomes high-temperature, low-humidity air. High-temperature, low-humidity air has a stronger regeneration capacity, which makes the mixed-air type two-stage rotary dehumidification air conditioning unit have a stronger dehumidification capacity, expanding its application range. Its minimum supply air humidity can be as low as 0.5g / kg, making it particularly suitable for applications in places requiring even lower humidity.

[0064] Of course, it is not excluded that in other embodiments, the outlet end of the return air duct is located between the inlet end of the regenerated air duct and the second dehumidification duct.

[0065] In some embodiments, such as Figure 1As shown, the duct between the first and second regeneration channels is equipped with a fresh air supply inlet, which has a flow regulating valve. The flow rate of fresh air flowing into the inlet is controlled by adjusting the opening of the flow regulating valve. It is understood that the fresh air supply inlet is connected to a fresh air duct, and the fresh air duct and fresh air channel can be independently installed and do not interfere with each other, or they can be connected to the same main fresh air duct.

[0066] Understandably, by introducing fresh air and mixing it with the regenerated air flowing from the second regeneration channel, the temperature of the regenerated air is appropriately reduced, ensuring that both the temperature and flow rate of the regenerated air meet the temperature and flow rate requirements of the first regeneration channel. For example, if the temperature of the air flowing from the second regeneration channel is 75°C, the temperature of the supplementary fresh air is 35°C, and the temperature of the regenerated air after mixing is 65°C, then the temperature requirement of the first regeneration channel can be met.

[0067] For example, if the air entering the regenerated air duct is at a temperature of 25°C, it is first preheated by the condenser 15 to raise its temperature to 65°C, and then reheated by the electric heater 16 to raise its temperature to 130°C. Compared to heating air from 25°C to 130°C using the electric heater 16 alone, the combination of the condenser 15 and the electric heater 16 reduces energy consumption.

[0068] Compared with existing technologies, since the first dehumidifying rotor 3 is a low-temperature regeneration type with a low regeneration temperature, the temperature of the air flowing out from the second regeneration channel is exactly the inlet air temperature required by the first regeneration channel. Therefore, the regeneration air flowing out from the second regeneration channel can directly flow into the first regeneration channel, or mix with the supplemented fresh air and then flow into the first regeneration channel without reheating. This can save the electric heating energy required for the regeneration of the first dehumidifying rotor 3 and further reduce the amount of electricity consumed.

[0069] In the operation of a two-stage rotary dehumidifier air conditioning unit with mixed airflow, fresh outdoor air flows into the fresh air duct. After being pre-cooled by the first pre-cooler 2, it enters the first dehumidification channel of the first dehumidifier 3. When the first dehumidifier 3 is running, the fresh air can complete the dehumidification process once. Then, the dehumidified air is mixed with the indoor air returning from the return air duct. Next, a portion of the mixed air flows into the first branch 5 and is cooled by the combined action of the second pre-cooler 8 and the evaporator 9. It then enters the second dehumidification channel of the second dehumidifier 10. When the second dehumidifier 10 is running, the air can complete the second dehumidification process, so that the air can meet the requirements of deep dehumidification. Subsequently, the deeply dehumidified air is temperature-regulated by the temperature control device to meet the indoor temperature requirements, and then enters the indoor space through the air supply duct.

[0070] Meanwhile, another portion of the mixed air enters the regeneration air duct through the second branch 6, and after absorbing the heat generated by the condenser 15 and the electric heater 16 in sequence, it becomes high-temperature, low-humidity air with strong regeneration capacity. Then, the high-temperature, low-humidity air flows into the second regeneration channel of the second dehumidification rotor 10 and the first regeneration channel of the first dehumidification rotor 3 in sequence to complete the desorption and regeneration work of the first dehumidification rotor 3 and the second dehumidification rotor 10, thereby improving the dehumidification capacity of the first dehumidification rotor 3 and the second dehumidification rotor 10. Finally, the air flowing out from the first regeneration channel will flow to the outside through the exhaust duct.

[0071] In the mixed-air type two-stage rotary dehumidifier air conditioning unit provided in this embodiment, since the first dehumidifier rotor 3 is a low-temperature regeneration rotor with a low regeneration temperature, and the temperature of the regeneration air flowing out from the second regeneration channel meets the inlet air temperature requirements of the first regeneration channel, the regeneration air flowing out from the second dehumidifier rotor 10 is directly used to heat and regenerate the first dehumidifier rotor 3, without the need to configure another electric heater 16 for the first dehumidifier rotor 3, thus saving the electric heating energy consumption required for the regeneration process of the first dehumidifier rotor 3.

[0072] Meanwhile, since the regeneration temperature of the second dehumidifying rotor 10 is high, the heat emitted by the condenser 15 in the heat pump system is first used to preheat the regeneration air of the second dehumidifying rotor 10, and then the electric heater 16 is used to reheat the regeneration air of the second dehumidifying rotor 10. This can make full use of air energy, improve energy efficiency, and reduce the energy consumption of the electric heater 16, thereby achieving the goal of energy saving and environmental protection.

[0073] Furthermore, the air flowing out from the first dehumidification channel and the return air flowing out from the return air channel are mixed to form mixed air. Part of the mixed air is heated to become high-temperature, low-humidity air, which is used as regeneration air. The regeneration air has low moisture content and strong regeneration capacity, which makes the mixed-air type two-stage rotary dehumidification air conditioning unit have stronger dehumidification capacity, reduces the supply air humidity, and helps to expand the application range of the mixed-air type two-stage rotary dehumidification air conditioning unit.

[0074] Furthermore, this embodiment employs a combination of a second precooler 8 connected to an external centralized cold source and an evaporator 9 of a direct expansion heat pump to perform two-stage precooling treatment on the air entering the second dehumidification channel. Additionally, a combination of a condenser 15 of the direct expansion heat pump and an electric heater 16 is used to preheat and reheat the regenerated air of the second dehumidification rotor 10 sequentially. This design leverages the high energy efficiency of the second precooler 8 connected to an external centralized cold source and utilizes the built-in evaporator 9 of the direct expansion heat pump to achieve a lower inlet air temperature for the second dehumidification rotor 10, thus improving its dehumidification capacity. Simultaneously, the condensation heat carried by the condenser 15 of the direct expansion heat pump can be directly utilized to provide a portion of the regeneration heat source for the two-stage rotor dehumidification system, reducing the load and power of the electric heater 16, saving costs, and achieving optimal overall energy efficiency.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A two-stage rotary dehumidifier air conditioning unit of the mixed-air type, characterized in that, include: The first dehumidification rotor has a first dehumidification channel and a first regeneration channel, and the first dehumidification rotor is configured as a low-temperature regeneration rotor. The second dehumidification impeller has a second dehumidification channel and a second regeneration channel; Fresh air duct; The air supply duct, the fresh air duct, the first dehumidification duct, the second dehumidification duct and the air supply duct are connected in sequence by pipelines; A temperature control device is located within the air supply channel; Return air duct; Exhaust duct; The regenerated air duct, its outlet end, the second regenerated duct, the first regenerated duct and the exhaust duct are connected in sequence by a pipeline, and the inlet end of the regenerated air duct and the outlet end of the return air duct are both connected to the pipeline between the first dehumidification duct and the second dehumidification duct. A heat pump system, which includes a condenser; An electric heater and the condenser are disposed within the regeneration air duct, with the electric heater located between the condenser and the second regeneration duct.

2. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to claim 1, characterized in that, The heat pump system also includes an evaporator, which is located on the pipeline between the first dehumidification channel and the second dehumidification channel. The inlet end of the regeneration air channel and the outlet end of the return air channel are both located on the side of the evaporator away from the second dehumidification channel.

3. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to claim 2, characterized in that, It also includes a second precooler, which is located on the pipeline between the first dehumidification channel and the second dehumidification channel. The evaporator is located between the second precooler and the second dehumidification channel. The inlet end of the regeneration air channel and the outlet end of the return air channel are both located on the side of the second precooler away from the second dehumidification channel.

4. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to claim 3, characterized in that, It also includes a first precooler, which is located inside the fresh air duct.

5. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to claim 4, characterized in that, The temperature control device includes a cooler and a heater, which are located within the air supply channel.

6. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to claim 5, characterized in that, The first precooler, the second precooler, and the cooler all have cold flow channels for connection to a centralized cold source.

7. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to claim 4, characterized in that, Air filters are installed in the pipes between the inlet end of the fresh air duct, the outlet end of the air supply duct, the outlet end of the return air duct, and the second precooler.

8. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to claim 1, characterized in that, Fans are installed in the exhaust duct, the pipe between the first dehumidification duct and the second dehumidification duct, and the pipe between the first regeneration duct and the second regeneration duct.

9. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to any one of claims 1 to 8, characterized in that, The outlet end of the return air duct is located between the inlet end of the regenerated air duct and the first dehumidification duct.

10. The two-stage rotary dehumidifier air conditioning unit of the mixed-air type according to claim 9, characterized in that, The pipeline between the first regeneration channel and the second regeneration channel is equipped with a fresh air supply inlet, and the fresh air supply inlet is equipped with a flow regulating valve.

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