CN100494793C - A Two-Stage Rotary Dehumidification Air-Conditioning Device Utilizing Low-grade Heat Sources - Google Patents

Abstract

A two grade runner dehumidification air-conditioning device, which belongs to refrigeration dehumidification technical field and can make use of low grade heat source, includes two stage dehumidification runners, two stage heat exchanges, two heaters, an evaporative cooler, a treating fan, a regeneration fan, a motor and a belt or a gear. The motor is connected with the dehumidification runners through the belt or the gear and drives the dehumidification runners to rotate. Every dehumidification runner is equipped with two areas of a treating area and a regeneration area. The treating area of the first stage dehumidification runner is connected with the inlet of the first stage heat exchanger. The outlet of the first stage heat exchanger is connected with the treating area of the second stage dehumidification runner. The other side of the second stage dehumidification runner is connected with the second stage heat exchanger. The second stage heat exchange is connected with the evaporative cooler. The evaporative cooler is connected with the treating fan. The regeneration fan is respectively connected with the regeneration areas of the two stage dehumidification runners. Two heaters are respectively connected with the other sides of the regeneration areas of the two stage dehumidification runners. Enough temperature and humidity descending can be achieved by the invention without an electric refrigeration air conditioning.

Description

A Two-Stage Rotary Dehumidification Air-Conditioning Device Utilizing Low-grade Heat Sources

technical field

The invention relates to an air conditioner in the technical field of refrigeration, in particular to a two-stage desiccant dehumidification air conditioner capable of utilizing low-grade heat sources.

Background technique

The rotary dehumidification technology using low-grade heat source is in line with the current general trend of energy saving, emission reduction and sustainable development. The dehumidification of the solid rotor can use a low-grade heat source to drive the drying rotor to remove the moisture in the air, making it into dry air, and then achieve the required temperature and humidity range through direct evaporative cooling, which can slow down the tense trend of power supply. In addition, the dehumidification of the rotary wheel reduces the use of chlorofluorocarbon refrigerants, and there is no CFCS problem and no greenhouse effect. It is an environmentally friendly refrigeration method. The latest research also found that the air treated by the wheel can remove harmful gases and components and improve air quality. The two-stage rotary desiccant air conditioner can be widely used in household, commercial, public places and industrial air conditioning and other fields, especially suitable for hot and humid climates, compared with pure electric drive air conditioners, it has high efficiency in heating and cooling More fresh air and good air treatment quality, environmental protection and other advantages, can achieve lower temperature and humidity requirements.

Conventional single-wheel dehumidification has the following disadvantages: 1) The regeneration temperature is high, mainly using heat sources such as electric heat and steam, and it is difficult to apply low-grade heat sources such as solar energy and waste heat. 2) The dehumidification capacity is limited, and sufficient moisture cannot be removed. Without the cooperation of electric refrigeration, the air supply temperature and humidity requirements of the comfort air conditioner cannot be met. 3) The deep dehumidification needs to cooperate with the electric refrigeration air conditioner, and the structure is complicated.

After searching the existing technical literature, it was found that the Chinese utility model patent with the patent number of 00227043.9 is called "low dew point rotary dehumidifier". The regeneration air duct is connected to the regeneration side of the dehumidification rotor, and the regeneration heater communicates with the regeneration side of the dehumidification rotor assembly through the regeneration air duct. The defects and shortcomings of this patented technology are: relying on a special heat source, the energy efficiency is not ideal, and under the standard environmental conditions in summer, it cannot reach the required air temperature and humidity adjustment range.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, to provide a two-stage dehumidification air-conditioning device that can use low-grade heat sources, so that it can use low-grade heat sources, and can reach a sufficient temperature without electric refrigeration and air conditioning. , Humidity drops, and the advantages of being able to handle fresh air and recover indoor heat.

The present invention is realized through the following technical solutions, and the present invention includes: two-stage dehumidification runners, two-stage heat exchangers, two heaters, evaporative coolers, processing fans, regeneration fans, motors, belts or gears. The motor is connected to the dehumidification runner through a belt or gear, and drives the dehumidification runner to rotate. Each dehumidification runner is divided into two areas: a treatment area and a regeneration area. The treatment area of the first-stage dehumidification rotor is connected to the inlet of the first-stage heat exchanger, the outlet of the first-stage heat exchanger is connected to the treatment area of the second-stage dehumidification rotor, and the other side of the second-stage dehumidification rotor is connected to the second-stage dehumidification rotor. The first-stage heat exchanger is connected, the second-stage heat exchanger is connected with the evaporative cooler, the regeneration fan is respectively connected with the regeneration zone of the two-stage dehumidification runner, and the two heaters are respectively connected with the other side of the regeneration zone of the two-stage dehumidification runner.

According to the air flow path, the air flow of the present invention is divided into two flow paths, a processing wind path and a regeneration wind path, specifically:

The processing air path: the first-stage dehumidification rotor, the first-stage heat exchanger, the second-stage dehumidification rotor, the second-stage heat exchanger, the evaporative cooler, and the processing fan are connected in series in sequence. Specifically: the first-stage dehumidification wheel treatment area is connected to the first-stage heat exchanger through the air duct, and the first-stage heat exchanger is connected to the second-stage dehumidification wheel treatment area, and the second-stage dehumidification wheel treatment area The other side of the zone is connected to the second-stage heat exchanger through the air pipe, and the second-stage heat exchanger is connected to the evaporative cooler through the air pipe. The evaporative cooler is connected to the process fan. The processing fan can also be arbitrarily placed between the above other components. The above components are sequentially connected in series.

The regeneration air path: the regeneration zone of the first-stage dehumidification wheel is connected to the first-stage heater through an air duct. The second-stage dehumidification wheel is connected with the regeneration area of the second-stage heater through an air duct. The regenerative blower is respectively connected with the first-stage dehumidification runner and the regeneration area of the second-stage dehumidification runner through air ducts. The first-stage dehumidification runner and the first-stage heat exchanger are connected in series, which is called the first-stage regeneration side. The regeneration zone of the second-stage dehumidification wheel is connected in series with the second-stage heat exchanger. It is called the second stage regeneration side. The first-stage regeneration side and the second-stage regeneration side are connected in parallel.

The heat exchanger may be a cross-flow heat exchanger for exchanging heat between air and air, or a water-air heat exchanger.

The heater can be a cross-flow heat exchanger for heat exchange between air and air, or a water-air heat exchanger.

The evaporative cooler is a direct evaporative cooler or a wet film humidifier capable of achieving isenthalpic humidification.

The dehumidifier includes silica gel, lithium chloride, molecular sieve, composite dehumidifier and the like.

The invention is a two-stage runner dehumidification system, which performs humidity and temperature treatment on outdoor fresh air or indoor return air. The humidity treatment is mainly completed by the first-stage dehumidification rotor and the second-stage dehumidification rotor, and the temperature treatment is mainly completed by the heat exchanger and the evaporative cooler. The air flow is divided into two paths, processing air (also called processing air) and regeneration air (also called regeneration air). After the process air passes through the dehumidification wheel, the moisture content decreases and the temperature rises slightly. After the regeneration air passes through the runner, the moisture content decreases and the temperature rises slightly. Typically, the regeneration air temperature is higher than the process air temperature.

In the present invention, what is introduced into the room in summer is the treatment wind, that is, the air in the treatment area, and the runner plays the function of dehumidification. What is introduced into the room in winter is regeneration wind, that is, the air in the regeneration area is passed through, and the runner plays the function of increasing the moisture content in the air. The dehumidifier used can be regenerated at a low regeneration temperature (50-70°C), so it can be regenerated by using vapor compression refrigeration condenser waste heat, solar hot water, solar hot air, etc.

The treatment process of the present invention in summer is: after dehumidification by the first-stage dehumidification rotor, the treated air is cooled by the heat exchanger, and flows through the second-stage dehumidification rotor again to make the treated air drier, and the dry treated air passes through the heat exchanger again Realize the enthalpy drop, then use the evaporative cooler to lower the temperature and humidify properly, adjust to a suitable temperature and humidity state and send it into the room.

The working principle of the present invention is:

(1) During the cooling season of the air conditioner, one side of the runner absorbs moisture in the air, that is, dehumidification, and the other side removes the moisture adsorbed in the runner through high-temperature air, that is, regeneration. Under standard summer conditions, the first stage rotor cannot remove enough moisture to cool down to a suitable temperature. Therefore, through the two-stage dehumidification of the runner and the cooling of the heat exchanger in series, the temperature and humidity of the treated air can reach a moderate temperature and low moisture content under high-temperature and high-humidity conditions, and then processed by an evaporative cooler to achieve a lower temperature and a suitable temperature. moisture content.

(2) In the heating season, the air is heated by the heater, and then passed through the regeneration zone of the runner to increase the moisture content in the air to reach a suitable temperature and humidity state, and then send it into the room.

The invention can be applied to air conditioning in summer and heating in winter in public buildings such as libraries, commercial buildings, factories and the like, and is suitable for large and medium-sized systems.

The present invention has following advantage and effect relative to prior art:

(1) Existing vapor compression electric refrigeration air conditioners tend to cause peak electricity consumption in summer, generally cannot provide fresh air, and require low-temperature dehumidification, and the air supply temperature is low. No humidification function in winter. The invention uses a low-grade heat source and can utilize renewable energy such as solar energy, and only a small amount of electric energy is used by fans and motors, and the effect of saving electric energy and carbon dioxide emission reduction is remarkable during the peak of electricity consumption in summer. And the air can be directly processed to the temperature and humidity required indoors, making the air supply more comfortable. It can input fresh air into the room, carry out effective heat and humidity treatment on the fresh air, and can recover the cold (heat) in the room. It can be directly used for heating in winter, and has a certain humidification function, so that the system can be used all year round.

(2) The existing single-stage dehumidifying air conditioner cannot meet the temperature and humidity required for indoor comfort under the standard operating conditions in summer, but the present invention can achieve lower temperature and humidity to meet the comfort requirements of the air conditioner.

(3) The present invention has a simple structure, is easy to control, and has low equipment investment costs. It is different from heat-driven refrigeration methods of adsorption and absorption refrigeration, and can realize miniaturization of heat-driven air-conditioning equipment. Under the same working conditions, the energy efficiency is better than that of adsorption and absorption air conditioners. Using natural working fluids such as air and water as the medium, there is no problem of ozone layer destruction, greenhouse gas emissions, or environmental pollution. It is a green and energy-saving refrigeration unit.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention based on two desiccant rotors

Fig. 2 is a structural schematic diagram of the partition of the first-stage dehumidification rotor in Fig. 1

Fig. 3 is a schematic diagram of the structure of the partition of the second stage dehumidification rotor in Fig. 1

Fig. 4 is a structural schematic diagram of an embodiment in which an evaporative cooler is installed on the regeneration side of the present invention

Fig. 5 is a structural schematic diagram of the heating system of the two-stage dehumidification air-conditioning device based on two dehumidification wheels that can utilize low-grade heat sources according to the present invention

Detailed ways

The embodiments of the present invention are described in detail below: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following implementation example.

Example 1

The structure of this embodiment is shown in Figure 1, and this embodiment includes: a processing air inlet duct 1, a first-stage dehumidification runner 2, a first-stage dehumidification runner drive motor 3, a first-stage treatment heat exchanger 4, and a first-stage dehumidification runner drive motor 3. Second-stage dehumidification rotor 5, second-stage dehumidification rotor drive motor 6, second-stage treatment heat exchanger 7, evaporative cooler 8, treatment fan 9, second-stage regenerative air inlet duct 10, second-stage regenerative heating Device 11, second-stage dehumidification runner drive belt 12, first-stage regeneration air inlet duct 13, first-stage regeneration heater 14, first-stage dehumidification runner drive belt 15, second-stage regeneration air outlet duct 16 , regeneration fan 17.

As shown in Figure 2, the first stage dehumidification rotor 2 treatment area 18 and the regeneration area 19 account for 3/4 and 1/4 of the area of the cross section of the rotor respectively, and can also be other ratios, such as 1/2 and 1/2 . As shown in Figure 3, the area of the second-stage dehumidification rotor 5 treatment area 20 and regeneration area 21 accounted for the cross-section of the rotor is respectively 3/4 and 1/4, and can also be other ratios, such as 1/2 and 1/2 . The wheel partition ratio of the first stage dehumidification runner 2 and the runner partition ratio of the second stage dehumidification runner 5 can be the same or different.

The first-stage dehumidification runner drive motor 3 is connected with the first-stage dehumidification runner 2 through the first-stage dehumidification runner drive belt 15 (or gear), and drives the first-stage dehumidification runner 2 to rotate. The second-stage dehumidification runner drive motor 6 is connected with the second-stage dehumidification runner 5 through the second-stage dehumidification runner drive belt 12 (or gear), and drives the second-stage dehumidification runner 5 to rotate.

There are two paths for air flow, namely, the processing air path and the regeneration air path.

The connection method of the processing air path is: the processing air inlet air duct 1 is connected to the air inlet side of the treatment area of the first-stage dehumidification rotor 2, and the air outlet side of the treatment area of the first-stage dehumidification rotor 2 is connected to the first air duct through the air duct. The 4 treatment side inlets of the stage treatment heat exchanger are connected. The outlet of the treatment side of the first-stage treatment heat exchanger 4 is connected to the air inlet side of the treatment area of the second-stage dehumidification wheel 5 through an air duct. The outlet side of the treatment area of the second-stage dehumidification rotor 5 is connected to the inlet of the second-stage treatment heat exchanger 7 through the air duct, and the outlet of the treatment side of the second-stage treatment heat exchanger 7 is connected to the evaporative cooler 8 through the air duct. connect. The evaporative cooler 8 is connected with the processing blower 9 again.

The connection mode of the regenerative air path is: one side of the first-stage regenerative heater 14 is connected to the first-stage regenerative air inlet air duct 13, and the other side is connected to the regenerative area of the first-stage dehumidification runner 2 through the air duct. The air outlet side of the regeneration zone of the stage dehumidification runner is connected with the regeneration fan 17. One side of the second-stage regenerative heater 11 is connected to the second-stage regenerative air inlet air duct 10, and the other side is connected to the regeneration area of the second-stage dehumidification runner 5 through the air duct, and the regeneration area of the second-stage dehumidification runner 5 The air outlet side is connected with the regenerative fan 17 . The two-stage regenerative side components are connected in parallel.

Based on the structure of the above-mentioned device, the cooling and dehumidification method of the two-stage rotary dehumidification air conditioner realized by the device in this embodiment is: outdoor air or indoor return air, or indoor and outdoor mixed air (referred to as processing air) enters the first air duct 1 from the processing air inlet In the treatment area of the primary dehumidification rotor 2, the moisture in the air is absorbed by the dehumidification rotor, and this process is an isenthalpic process. The air temperature has risen, if you continue to dehumidify, the dehumidification effect will become worse. The process air then enters the first stage process heat exchanger 4, where it transfers heat to a cooling medium, such as water or air, on the other side of the heat exchanger. Then, the treated air that has been lowered in temperature enters the treatment area of the second-stage dehumidification rotor 5 again, and the moisture in the air is further absorbed by the dehumidification rotor 5 to become air with a lower moisture content. Then, it enters the second-stage treatment heat exchanger 7 again, and transfers heat to the cooling medium on the other side of the heat exchanger. Since the selected cooling medium is cooling tower cold water or outdoor air, or indoor return air, the temperature drop of the treated air through the second-stage heat exchanger 7 has not yet reached the comfortable air supply requirement. Since the moisture content of the processing air at this time is low, that is, the enthalpy drop has reached the air supply requirement, the processing air flows through the evaporative cooler 8 to reduce the temperature and humidity and increase the moisture content, thereby achieving a comfortable air supply temperature and humidity working condition . The processing air is driven by the processing fan 9 located at the outlet of the evaporative cooler 8 (the processing fan 9 can also be arranged between other components through which the processing air flows) and sent into the air-conditioned room.

The first and second wheel drive motors 3 and 6 drive the first and second dehumidification runners 2 and 5 to rotate through belts (or gears) 15 respectively. The part of the first and second dehumidification wheels that absorb moisture is driven by the motor and rotates to the regeneration zone to be heated by the regeneration air to remove the adsorbed moisture. The regeneration air can be outdoor air or indoor return air. It enters the first and second regeneration heaters 14 and 11 respectively from the first and second regeneration air inlet pipes, and is heated to the required regeneration temperature and then enters the dehumidification wheel for regeneration. district. The regeneration air passing through the regeneration zone of the runner experiences an isenthalpic process, the temperature drops, but the moisture content increases. The flow of the two-stage regeneration air is driven by the regeneration blower 17 arranged at the outlet of the regeneration zone (the regeneration blower 17 can also be arranged in other positions where the regeneration wind flows), and is discharged to the outside.

In winter, regenerative wind can be introduced into the room to heat and humidify the room. During heating in winter, the first stage treatment heat exchanger 4, the second stage treatment heat exchanger 7 and the evaporative cooler 8 on the treatment wind side may not work, and the treatment wind is discharged outside.

The two-stage dehumidification and air-conditioning device with rotary wheels in this embodiment can be applied to air-conditioning in summer and heating in winter in places such as libraries and other public buildings, commercial buildings, and factories, and is suitable for large and medium-sized systems.

This embodiment realizes the miniaturization of heat-driven air-conditioning equipment and reduces the cost of heat-driven air-conditioning equipment; it has the characteristics of simple structure, easy control of system operation, etc., can effectively use low-grade heat sources such as solar energy, and has no environmental pollution. It is a green energy-saving type refrigeration unit.

Example 2

The structure of this embodiment is shown in Figure 4. The two-stage rotor dehumidification air conditioner includes: a processing air inlet duct 1, a first-stage dehumidification runner 2, a first-stage dehumidification runner drive motor 3, and a first-stage processing circuit. Heater 22, second-stage dehumidification runner 5, second-stage dehumidification runner drive motor 6, second-stage treatment regenerator 23, evaporative cooler 8, treatment fan 9, second-stage regeneration air inlet duct 10, Second-stage regenerative heater 11, second-stage dehumidification runner drive belt 12, first-stage regeneration air inlet duct 13, first-stage regeneration heater 14, first-stage dehumidification runner drive belt 15, second-stage regeneration Air outlet duct 16, regeneration fan 17, regeneration air inlet main pipe 24, regeneration side evaporative cooler 25. Figure 2 and Figure 3 are schematic diagrams of the first-stage dehumidification rotor 2 and the second-stage dehumidification rotor 5-partition structure. The area of the first-stage dehumidification rotor 2, the treatment area 18 and the regeneration area 19, account for 3/4 of the cross-section of the rotor. and 1/4, or other ratios, such as 1/2 and 1/2. As shown in Figure 3, the area of the second-stage dehumidification rotor 5 treatment area 20 and regeneration area 21 accounted for the cross-section of the rotor is respectively 3/4 and 1/4, and can also be other ratios, such as 1/2 and 1/2 . The wheel partition ratio of the first stage dehumidification runner 2 and the runner partition ratio of the second stage dehumidification runner 5 can be the same or different.

The difference between this embodiment and Embodiment 1 is that the regeneration side evaporative cooler 25 is added to cool down the air introduced from the environment or the indoor return air, and the regeneration side evaporative cooler 25 is connected to the regeneration air first-stage treatment regenerator 22 , The regeneration-side evaporative cooler 25 is also connected to the second-stage treatment regenerator 23 for cooling the treatment air.

The first-stage dehumidification runner drive motor 3 is connected with the first-stage dehumidification runner 2 through the first-stage dehumidification runner drive belt 15 (or gear), and drives the first-stage dehumidification runner 2 to rotate. The second-stage dehumidification runner drive motor 6 is connected with the second-stage dehumidification runner 5 through the second-stage dehumidification runner drive belt 12 (or gear), and drives the second-stage dehumidification runner 5 to rotate.

There are two paths for air flow, namely, the processing air path and the regeneration air path. The connection method of the processing air path is: the processing air inlet air duct 1 is connected to the air inlet side of the treatment area of the first-stage dehumidification rotor 2, and the air outlet side of the treatment area of the first-stage dehumidification rotor 2 is connected to the first air duct through the air duct. The treatment side inlet of the stage treatment regenerator 22 is connected. The outlet of the treatment side of the first-stage treatment regenerator 22 is connected to the air inlet side of the treatment area of the second-stage dehumidification wheel 5 through an air duct. The outlet side of the treatment area of the second-stage dehumidification runner 5 is connected to the inlet of the treatment side of the second-stage treatment regenerator 23 through the air pipe, and the outlet of the treatment side of the second-stage treatment regenerator 23 is connected to the evaporative cooler 8 through the air pipe. connect. The evaporative cooler 8 is connected with the processing blower 9 again.

The connection mode of the regeneration air path is: the regeneration air inlet main pipe 24 is connected with the regeneration side evaporative cooler 25 . The outlet of the evaporative cooler 25 on the regeneration side is connected to the first and second stage treatment regenerators 23 respectively. One side of the first-stage regenerative heater 14 is connected to the first-stage treatment regenerator 22, and the other side is connected to the regeneration zone of the first-stage dehumidification runner 2 through an air duct, and the air outlet side of the first-stage dehumidification runner regeneration zone Then be connected with regeneration fan 17. One side of the second-stage regenerative heater 11 is connected to the second-stage treatment regenerator 23, and the other side is connected to the regeneration zone of the second-stage dehumidification runner 5 through an air duct, and the regeneration zone of the second-stage dehumidification runner 5 goes out. The wind side is then connected with the regenerative fan 17. The two-stage regenerative side components are connected in parallel.

Based on the structure of the above-mentioned device, the cooling and dehumidification method of the two-stage rotary dehumidification air conditioner realized in this embodiment is: outdoor air or indoor return air, or indoor and outdoor mixed air (referred to as processing air) enters the first air duct 1 from the processing air inlet. In the treatment area of stage dehumidification rotor 2, the moisture in the air is absorbed by the dehumidification rotor, and this process is an isenthalpic process. The air temperature has risen, if you continue to dehumidify, the dehumidification effect will become worse. The process air then enters the first stage process regenerator 22, where it transfers heat to the cooling medium on the other side of the heat exchanger, ie the air passing through the evaporative cooler. Then, the treated air that has been lowered in temperature enters the treatment area of the second-stage dehumidification rotor 5 again, and the moisture in the air is further absorbed by the dehumidification rotor 5 to become air with a lower moisture content. Then, it enters the second-stage processing regenerator 7 again, and transfers heat to the cooling medium on the other side of the heat exchanger. Since the selected cooling medium is cooling tower cold water or outdoor air, or indoor return air, the temperature drop of the treated air after the second-stage treatment regenerator 23 has not yet reached the comfortable air supply requirement. Since the moisture content of the processing air at this time is low, that is, the enthalpy drop has reached the air supply requirement, the processing air flows through the evaporative cooler 8 to reduce the temperature and humidity and increase the moisture content, thereby achieving a comfortable air supply temperature and humidity working condition . The flow of the processing wind is driven by the processing fan 9 at the outlet of the evaporative cooler 8 (the processing fan 9 can also be arranged between other components through which the processing wind flows) and sent into the air-conditioned room.

The first and second wheel drive motors 3 and 6 drive the first and second dehumidification runners 2 and 5 to rotate through belts (or gears) respectively. The part of the first and second dehumidification wheels that absorb moisture is driven by the motor and rotates to the regeneration zone to be heated by the regeneration air to remove the adsorbed moisture. The regeneration air can be outdoor air or indoor return air, and enters the regeneration side evaporative cooler 25 through the regeneration air inlet main pipe 24, and is isenthalpic humidified and the temperature drops. Then it enters the first and second treatment heat exchangers respectively, which are used to cool the treatment air and get preheated. Then enter the first and second regeneration heaters 14, 11, and be heated to the required regeneration temperature and then enter the regeneration zone of the dehumidification wheel. The flow of the two-stage regeneration air is driven by the regeneration blower 17 arranged at the outlet of the regeneration zone (the regeneration blower 17 can also be arranged in other positions where the regeneration wind flows), and is discharged to the outside.

The two-stage dehumidification and air-conditioning device with rotary wheels in this embodiment can be applied to air-conditioning in summer and heating in winter in places such as libraries and other public buildings, commercial buildings, and factories, and is suitable for large and medium-sized systems.

This embodiment realizes the miniaturization of heat-driven air-conditioning equipment and reduces the cost of heat-driven air-conditioning equipment; it has the characteristics of simple structure, easy control of system operation, etc., can effectively use low-grade heat sources such as solar energy, and has no environmental pollution. It is a green energy-saving type refrigeration unit.

Example 3

The structural form of this embodiment is shown in FIG. 5 . Compared with Example 2, the structure of this embodiment has no evaporative cooler on the regeneration side and is only used for heating in winter.

Compared with Embodiment 2, the difference in its connection method is:

The treatment air passes through the treatment side outlet of the first-stage treatment regenerator 22 and is connected with the treatment blower 9 through the air duct 27 . The second-stage treatment air inlet pipe 26 is connected to the air inlet side of the treatment area of the second-stage dehumidification rotor 5, and the air outlet side of the treatment area of the second-stage dehumidification rotor 5 is treated with the second-stage treatment regenerator 23 through the air duct. The side inlets are connected, and the second-stage treatment regenerator 23 is connected to the evaporative cooler 8 through an air pipe. The evaporative cooler 8 is connected with the processing blower 9 again. The two-stage processing side components are connected in parallel.

The connection mode of the regeneration air path is similar to that of Embodiment 2, but the evaporative cooler may not be connected, and the two-stage regeneration side components are in a parallel state.

Based on the structure of the above-mentioned device, the cooling and dehumidification method of the two-stage rotary dehumidification air conditioner realized in this embodiment is: outdoor air or indoor return air, or indoor and outdoor mixed air (referred to as processing air) enters the first air duct 1 from the processing air inlet. In the treatment area of stage dehumidification rotor 2, the moisture in the air is absorbed by the dehumidification rotor, and this process is an isenthalpic process. The temperature of the air has risen, and the air on the regeneration side can be preheated by the first-stage treatment regenerator 22 . Then it is discharged outdoors through the processing blower 9. The air flow process and state change of the second-stage treatment side are the same as those of the first stage.

The first and second wheel drive motors 3 and 6 drive the first and second dehumidification runners 2 and 5 to rotate through belts (or gears) respectively. The first and second dehumidification rotors absorb moisture (treatment area) and rotate to the regeneration area under the drive of the motor to be heated by regeneration air, and the moisture adsorbed by the rotors is removed.

The regeneration air can be outdoor air or indoor return air, which enters the first and second regeneration heaters 14 and 11 respectively from the first and second regeneration air inlet pipes 10 and 13, and is heated to a certain temperature and then enters the dehumidification wheel regeneration zone. In the regeneration zone, the regeneration air obtains the moisture adsorbed by the rotor, undergoes an isenthalpic process, and the temperature drops slightly. The flow of the two-stage regeneration air is driven by the regeneration blower 17 arranged at the outlet of the regeneration zone (the regeneration blower 17 can also be arranged in other positions where the regeneration wind flows), and is sent into the room.

The two-stage dehumidification and air-conditioning device with rotary wheels in this embodiment can be applied to air-conditioning in summer and heating in winter in places such as libraries and other public buildings, commercial buildings, and factories, and is suitable for large and medium-sized systems.

Claims (6)

1. A two-stage desiccant dehumidification air-conditioning device that can utilize low-grade heat sources, including: two-stage dehumidification runners, two-stage heat exchangers, two heaters, evaporative coolers, processing fans, regeneration fans, motors, belts Or gear, characterized in that: the motor is connected to the dehumidification runner through a belt or gear to drive the dehumidification runner to rotate. Each dehumidification runner is divided into two areas: a treatment area and a regeneration area. The inlet of the first-stage heat exchanger is connected, the outlet of the first-stage heat exchanger is connected to one side of the treatment area of the second-stage dehumidification wheel, and the other side of the treatment area of the second-stage dehumidification wheel exchanges heat with the second stage The second-stage heat exchanger is connected with the evaporative cooler, the regeneration fan is respectively connected with one side of the regeneration zone of the two-stage dehumidification rotor, and the two heaters are respectively connected with the other side of the regeneration zone of the two-stage dehumidification rotor connect. 2. The two-stage rotary dehumidification air-conditioning device that can utilize low-grade heat sources according to claim 1, characterized in that, the first-stage dehumidification rotary treatment area is connected to the first-stage heat exchanger through an air duct, and the The first-stage heat exchanger is connected to one side of the second-stage dehumidification wheel treatment area, while the other side of the second-stage dehumidification wheel treatment area is connected to the second-stage heat exchanger through an air duct, and the second-stage heat exchanger The heater is connected to the evaporative cooler through the air pipe, and the evaporative cooler is connected to the processing fan to form the processing air path of the whole device. 3. The two-stage rotary dehumidification air-conditioning device that can utilize low-grade heat sources according to claim 1, characterized in that, the first-stage dehumidification rotary regeneration zone is connected to the first-stage heater through an air duct, and the second stage The first-stage dehumidification rotor is connected to the regeneration area of the second-stage heater through the air duct, and the regeneration fan is connected to the first-stage dehumidification rotor and the second-stage dehumidification rotor regeneration area through the air duct to form the regeneration air path of the whole device. The first-stage dehumidification rotor and the first-stage heat exchanger are connected in series, which is the first-stage regeneration side, and the second-stage dehumidification rotor regeneration area and the second-stage heat exchanger are connected in series, which is the second-stage regeneration side. The first-stage regeneration side and the second-stage regeneration side are connected in parallel. 4. The two-stage rotary dehumidification air-conditioning device that can utilize low-grade heat sources according to claim 1, 2 or 3, characterized in that the heat exchanger is a cross-flow heat exchanger that exchanges heat between air and air, or It is a water-air heat exchanger. 5. The two-stage desiccant dehumidification air-conditioning device that can utilize low-grade heat sources according to claim 1 or 3, characterized in that the heater is a cross-flow heat exchanger that exchanges heat between air and air, or a water vapor Heat Exchanger. 6. The two-stage rotary dehumidification air-conditioning device that can utilize low-grade heat sources according to claim 1 or 2, wherein the evaporative cooler is a direct evaporative cooler or a wet film humidifier that can realize isenthalpic humidification .

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