CN217330032U - Regeneration system for rotating wheel dehumidification equipment and rotating wheel dehumidification equipment - Google Patents

Abstract

The utility model relates to a regeneration system for runner dehumidification equipment. The regeneration system comprises a regeneration air duct, a heat pump device and a gas introducing device. The gas flows in the regeneration air duct through the regeneration area of the rotating wheel dehumidification device to regenerate the same. The heat pump device includes an evaporator provided in the regeneration duct, the evaporator being located downstream of the runner in the gas flow direction, and being configured such that refrigerant in the evaporator absorbs heat from the gas. The gas introduction device is configured to introduce external gas into the regeneration duct and is positioned between the runner and the evaporator. The utility model discloses still provide the runner dehumidification equipment including this regeneration system. According to the utility model discloses a product can fully retrieve the heat from the regeneration zone combustion gas of runner to optionally use this recovery heat to heat the gas of regeneration zone upper reaches in order to improve the heating capacity of system and reduce its energy consumption.

Description

Regeneration system for rotating wheel dehumidification equipment and rotating wheel dehumidification equipment

Technical Field

The utility model relates to a runner dehumidification equipment's regeneration system and have this regeneration system's runner dehumidification equipment.

Background

This section merely provides background information related to the present invention that may not be prior art.

The rotating wheel dehumidification device adsorbs moisture in gas (e.g., air) with the rotating wheel to obtain dry gas, and flows high-temperature gas (e.g., air) through the moisture-adsorbed portion of the rotating wheel to cause it to desorb the moisture for regeneration (i.e., to enable the rotating wheel to continue adsorbing moisture). As such, the wheel dehumidification apparatus includes a treatment system that adsorbs moisture in the gas and a regeneration system that regenerates the wheel. During dehumidification, the rotor is slowly rotated continuously in the treatment system and the regeneration system. The area where the wheel rotates into the treatment system is generally referred to as the treatment area, and the area where the wheel rotates into the regeneration system is generally referred to as the regeneration area. After the process zone of the wheel adsorbs moisture or even reaches saturation, it is spun into a regeneration system and regenerated by desorbing the moisture with a high temperature gas. The processes of the process and the regeneration process of the rotary wheel are continuously circulated, thereby enabling the rotary wheel dehumidification apparatus to be continuously operated.

In some existing regeneration systems, the gas flowing through the regeneration zone of the wheel is discharged directly to the ambient environment, and is therefore also referred to as exhaust gas. In other existing regeneration systems, a heat pump device is provided to recover heat of exhaust gas, and the gas to be regenerated of the runner is heated using the recovered heat, thereby reducing energy consumption of the regeneration system.

SUMMERY OF THE UTILITY MODEL

In view of the existing regeneration systems, the energy consumption is still large, resulting in a reduced energy efficiency of the rotary dehumidification plant. Accordingly, it is desirable in the art to provide a regeneration system capable of further reducing energy consumption and a rotary wheel dehumidification apparatus including the regeneration system.

In view of the above problems, the inventors of the present application have proposed a regeneration system and a heat recovery method capable of improving the recovery efficiency of heat of exhaust gas. With this regeneration system or heat recovery method, the increased heat recovered can be used to improve the heating capacity of the gas to be regenerated for the rotor, whereby the energy efficiency of the rotary dehumidification apparatus can be improved.

According to an aspect of the present invention, a regeneration system for a rotating wheel dehumidification device is provided. The regeneration system comprises a regeneration air duct, a heat pump device and a gas introducing device. The gas flows in the regeneration air duct through a regeneration area of a wheel of the wheel dehumidification device to regenerate the regeneration area. The heat pump device includes an evaporator provided in the regeneration duct, the evaporator being located downstream of the runner in the gas flow direction, and being configured such that refrigerant in the evaporator absorbs heat from the gas. The gas introduction device is configured to introduce external gas into the regeneration duct and is positioned between the runner and the evaporator.

In some embodiments, the heat pump apparatus further comprises a condenser disposed in the regeneration duct. The condenser is located upstream of the wheel in the gas flow direction and is configured to heat the gas by a refrigerant in the condenser.

In some embodiments, the regeneration system comprises two or more of the heat pump devices. The condenser and the evaporator of the heat pump apparatus are arranged in sequence upstream and downstream of the runner, respectively, in the gas flow direction, thereby heating the gas and absorbing heat from the gas, respectively, in a gradient manner.

In some embodiments, the gas introduction device is provided for each evaporator. The gas introduction device is provided between the rotary wheel and the evaporator adjacent to the rotary wheel or between adjacent evaporators.

In some embodiments, the gas introduction means comprises a valve.

In some embodiments, the valve comprises an on-off valve or an adjustable valve.

In some embodiments, the valve is manually or electrically adjustable.

In some embodiments, the regeneration system comprises a plurality of said gas introduction devices arranged along the axial and/or circumferential direction of the regeneration duct.

According to the utility model discloses a another aspect provides a runner dehumidification equipment. The rotary wheel dehumidification equipment comprises the regeneration system.

According to another aspect of the present invention, there is provided a heat recovery method for a regeneration system of a rotary wheel dehumidification apparatus, wherein the regeneration system includes a regeneration air duct and a heat pump device, the heat pump device includes an evaporator located in a downstream of a rotary wheel of the rotary wheel dehumidification apparatus along a gas flow direction in the regeneration air duct, and the evaporator is configured to cause a refrigerant in the evaporator to absorb heat from gas in the regeneration air duct. The heat recovery method comprises the following steps: operating the heat pump device; and introducing external air into the regeneration air duct between the evaporator and the runner through an air introduction device.

In some embodiments, the heat recovery method further comprises heating the gas upstream of the runner by a condenser of the heat pump apparatus.

In some embodiments, the heat recovery method further comprises: selecting at least one heat pump device from a plurality of heat pump devices to operate; and introducing external air into the regeneration duct via a corresponding one of the plurality of gas introduction devices according to the operating heat pump device.

In some embodiments, the heat recovery method further comprises adjusting the amount of gas introduced into the regeneration duct.

In some embodiments, the gas introduction device is adjusted such that the amount of introduced external gas is increased when the heating temperature of the gas upstream of the runner is low for a first predetermined time. Adjusting the gas introduction means such that the amount of introduced outside gas is reduced when the heating temperature of the gas upstream of the runner is high for a second predetermined time, which is the same as or different from the first predetermined time.

The utility model provides a modified is used for runner dehumidification equipment's regeneration system and has this regeneration system's runner dehumidification equipment. In the rotary wheel dehumidification device according to the present invention, by providing the heat pump device having the first heat pump unit and the second heat pump unit, on one hand, the temperature of the regenerated fresh air can be effectively raised, the heating load of the regenerative heating device can be reduced, and the energy of the exhaust air on the regeneration side can be effectively recycled, and the energy consumption of the regeneration system of the rotary wheel dehumidification device can be significantly reduced; on the other hand, the temperature of the regenerated air can be continuously adjusted in a large range, so that the device can adapt to different working conditions.

According to the utility model discloses a regeneration system, runner dehumidification equipment and heat recovery method can increase the amount of wind that flows through the evaporimeter through gas introduction device from the outside introduction gas to retrieve the heat of the regeneration zone combustion gas from the runner fully. Alternatively, the recovered heat may be used to heat the gas upstream of the regeneration zone (i.e., the gas that is to be regenerated by removing moisture from the regeneration zone of the wheel) to increase the heating capacity of the regeneration system and reduce its energy consumption.

According to the utility model discloses a gas introducing device can include the valve, consequently can show with lower cost and increase the heat recovery effect. Further, the gas introduction means may be adjustable, whereby various demands can be adapted by varying the amount of introduced air. In the present invention, the gas introducing means may be plural and may be selected therefrom, thereby satisfying more demands.

Drawings

The features and advantages of one or more embodiments of the present invention will become more readily understood from the following description with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram illustrating the principles of a rotary wheel dehumidification plant;

fig. 2 is a schematic diagram showing the principle of a regeneration system according to a first embodiment of the present invention;

figure 3 is a psychrometric chart of the gases within the regeneration system of figure 2;

fig. 4 is a schematic diagram showing the principle of a regeneration system according to a second embodiment of the present invention;

figure 5 is a psychrometric chart of the gases within the regeneration system of figure 4;

fig. 6 is a schematic diagram showing the principle of a regeneration system according to a third embodiment of the present invention;

figure 7 is a psychrometric chart of the gases within the regeneration system of figure 6; and

fig. 8 is a flowchart illustrating a heat recovery method of a regeneration system of a rotating wheel dehumidification device according to an embodiment of the present invention.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, like reference numerals indicate like or similar parts and features. The drawings are only schematic representations, not necessarily indicative of the specific dimensions and proportions of various embodiments of the invention, illustrating the principles and concepts of the embodiments of the invention. Certain features that are in certain figures may be shown exaggerated in detail in order to illustrate relevant details or structures of embodiments of the invention.

The rotary dehumidification apparatus 100 will be described with reference to fig. 1. The rotary wheel dehumidification apparatus 100 includes a treatment system 10, a regeneration system 20, and a rotary wheel R. The treatment system 10 and the regeneration system 20 are divided in fig. 1 by a dashed line. The treatment system 10 is below the dashed line and the regeneration system 20 is above the dashed line. The wheel R rotates slowly in the treatment system 10 and the regeneration system 20. The runner R includes a process region R1 (a lower region below the broken line shown in fig. 1) in the process system 10 for adsorbing moisture in the gas and a regeneration region R2 (an upper region above the broken line shown in fig. 1) in the regeneration system 20 for desorbing moisture by the high-temperature gas to regenerate.

In the processing system 10, when a gas to be processed (for example, air containing moisture) a flows through the processing region R1 of the runner R by the fan 15, the processing region R1 adsorbs moisture in the gas, thereby obtaining a dry gas F. The dry gas F can be supplied to a desired space. As the rotor R is slowly rotated by the driving motor M, the processing region R1 in which moisture is adsorbed or even saturated is rotated into the regeneration system 20 to become a regeneration region R2 to be regenerated by the high-temperature gas.

In order to better remove moisture in the gas or provide other functions, for example, filters 11, 14, and 18 for removing dust in the gas a and surface coolers 12, 13, and 16 for cooling the gas and removing part of the humidity may be provided on the upstream side and the downstream side of the runner R. Further, in the example shown in fig. 1, a heater 17 may be further provided in the processing system 10 before the dry gas F enters the predetermined space, to raise the temperature of the gas and further remove moisture in the gas.

In the regeneration system 20, gas O is introduced by a fan 23. The gas O is heated via the condensers 35 and 45 and the heater 22 of the heat pump devices 30 and 40. As the hot gas (e.g., air) O flows through the regeneration region R2 of the wheel R, the regeneration region R2 is dehumidified (i.e., regenerated) by the hot gas, thereby continuing to spin into the treatment system 10 for continued adsorption of moisture. The gas K discharged from the regeneration region R2 of the runner passes through the evaporators 32 and 42 of the heat pump apparatuses 30 and 40 and is then discharged to the ambient environment.

Similarly, upstream of the runner R, the regeneration system 20 may also comprise a filter 21 for removing impurities in the gas O.

It should be understood that the structure of the rotary dehumidification device 100 is not limited to the specific example shown in fig. 1, but may be varied. For example, the number of the heat pump devices and the heaters is not limited to two as shown in the drawing, but may be varied according to the target regeneration temperature of the runner R. For example, only a single heat pump device may be provided when the target regeneration temperature of the runner R is not too high, and a plurality of two heat pump devices may be provided when the target regeneration temperature of the runner R is very high.

The regeneration system 20 according to the first embodiment of the present invention will be described in detail below with reference to fig. 1 and 2.

As shown in fig. 1 and 2, the heat pump apparatus 40 includes a compressor 43, a condenser 45, an expansion device 44, and an evaporator 42. In the heat pump apparatus 40, a refrigerant is compressed by the compressor 43 to form a high-temperature and high-pressure gas, releases heat to a surrounding fluid when passing through the condenser 45 to form a low-temperature and high-pressure liquid, forms a low-temperature and low-pressure liquid when passing through the expansion device 44, absorbs heat of the surrounding fluid when passing through the evaporator 42 to form a low-temperature and low-pressure gas, and then reenters the compressor 43, thereby circulating the refrigerant. The heat pump apparatus 30 includes a compressor 33, a condenser 35, an expansion device 34, and an evaporator 32. The operation of the heat pump apparatus 30 is similar to that of the heat pump apparatus 40, and thus will not be described in detail.

The temperature of the gas K exiting the regeneration zone R2 of the rotor R is typically 50 c to 80 c, which would be wasted if discharged directly to the ambient environment. To this end, the evaporators 32 and 42 may be disposed in the regeneration duct 60 downstream of the runner R so that the refrigerant in the evaporators can exchange heat with the gas K. At the evaporator, the gas K gives off heat, and the refrigerant absorbs the heat, thereby recovering the heat of the gas K. The evaporators 32 and 42 may be arranged in sequence along the flow direction of the gas K, thereby performing heat exchange in a gradient manner.

According to the example shown in the figure, the evaporator 32 of the heat pump apparatus 30 serves as a first stage heat recovery device, and the evaporator 42 of the heat pump apparatus 40 is located downstream of the evaporator 32 as a second stage heat recovery device. In this arrangement, the evaporation temperature of the evaporator 32 of the heat pump apparatus 30 may be higher than the evaporation temperature of the evaporator 42 of the heat pump apparatus 40.

In addition to the above-described heat recovery by the evaporator downstream of the wheel R, the gas O upstream of the wheel R may be heated by the condenser. As shown, the condensers 45 and 35 may be disposed in the regeneration duct 60 of the regeneration system 20 upstream of the runner R, such that the refrigerant within the condensers can exchange heat with the gas O introduced into the regeneration duct 60. At the condenser, the refrigerant gives off heat, while the gas O absorbs heat and is thus heated. The condensers 45 and 35 may be arranged in sequence along the flow direction of the gas O, thereby heating the gas O in a gradient manner.

According to the example shown in the figure, the condenser 45 of the heat pump apparatus 40 functions as a first stage heater, and the condenser 35 of the heat pump apparatus 30 is located downstream of the condenser 45 and functions as a second stage heater. In this arrangement, the condensing temperature of the condenser 45 of the heat pump apparatus 40 may be lower than the condensing temperature of the condenser 35 of the heat pump apparatus 30. The heat pump apparatus 40 may be referred to as a medium temperature heat pump apparatus, and the heat pump apparatus 30 may be referred to as a high temperature heat pump apparatus. In the heat pump device 30, an enhanced vapor injection device 50 may be provided for energy efficiency. The air-injection enthalpy-increasing device 50 is configured to introduce a portion of the refrigerant in the flow path between the expansion device 34 and the condenser 35 directly into one compression chamber (e.g., an intermediate-pressure chamber) of the compressor 33.

Further, the heater 22 is located downstream of the condenser 35 as a third stage heater. It will be appreciated that the heater 22 may be omitted where the heat pump arrangement is capable of meeting the requirements.

Referring to FIG. 2, the regeneration system 20 also includes gas introduction devices 81 and 82. The gas introduction devices 81, 82 are configured to introduce external gas (e.g., air) into the regeneration duct 60 between the runner and the evaporators 32, 42.

When the heat pump devices 30 and 40 are operated, the external air is introduced into the regeneration air duct 60 through the air introduction devices 81 and 82, so that the exhaust air volume of the regeneration air duct 60 can be increased, the evaporation temperature can be increased, and the energy efficiency and the heating capacity of the heat pump devices can be improved. In addition, since the heating capacity of the heat pump apparatus is increased, that is, the temperature of the refrigerant at the condenser is increased, the gas O can be further heated to a higher temperature. In this case, the need for the heater 22 can be reduced, and the heater 22 can even be omitted. Therefore, the energy consumption of the rotary dehumidification device can be reduced.

Owing to set up gaseous introducing device, according to the utility model discloses a regeneration system is semi-enclosed heat pump recovery structure. By introducing the external air through the air introducing device, the heat recovery efficiency can be improved, and therefore, the energy efficiency of the rotary wheel dehumidification device can be improved.

In the example shown in fig. 2, the gas introduction device 81 is arranged between the evaporator 32 and the regeneration region R2 of the runner R. The gas introduction device 81 is located on the upstream side of the evaporators 32 and 42, and therefore, heat exchange at both the evaporators 32 and 42 can be promoted. When the heat pump apparatus 30 and/or 40 is operated, the gas introduction apparatus 81 may be turned on or operated to introduce the external gas to promote heat exchange at the evaporators 32 and/or 42.

In the example shown in fig. 2, the gas introduction devices 81 and 82 are arranged in the axial direction of the regeneration duct 60. The gas introduction device 82 is disposed between the adjacent evaporators 32 and 42. In other words, the gas introduction device 82 is located downstream of the evaporator 32, and upstream of the evaporator 42. Therefore, the gas introduction device 82 can promote only the heat exchange at the evaporator 42. In this case, when only the heat pump apparatus 30 is operated (the heat pump apparatus 40 is not operated), only the gas introduction apparatus 82 may be turned on or operated, and the gas introduction apparatus 82 may be turned off or not operated.

In the rotary wheel dehumidification apparatus 100, at least one of the heat pump devices 30 and 40 may be selectively operated, and the respective ones of the gas introduction devices 81 and 82 may be selectively turned on or operated as needed, to effectively improve heat recovery efficiency.

Each of the gas introduction devices 81 and 82 may include a valve. For example, the valve may be an on-off valve or a variable valve. The adjustable valve is configured to adjust the size of the valve port and thus the air volume. The adjustable valve may be manually or electrically adjustable.

The gas introduction device 81 or 82 may be plural, for example, arranged along the axial direction of the regeneration duct 60.

It should be understood that the number, arrangement, structure, etc. of the gas introduction means may be changed as needed as long as it can introduce the external gas into the regeneration duct 60.

Fig. 3 shows a psychrometric chart in which both the heat pump devices 30 and 40 are operated and both the gas introduction devices 81 and 82 are operated. In fig. 3, the abscissa represents the moisture content in the gas in g/kg (grams per kilogram), and the ordinate represents the dry-bulb temperature of the gas in ℃ (celsius). Dry bulb temperature refers to the actual temperature measured with a common thermometer for the surrounding environment, often also referred to simply as temperature. The moisture content refers to the mass of water vapor in the humid air that coexists with one kilogram of dry air. The dashed lines in fig. 3 represent isenthalpic lines.

Points a to g in fig. 3 indicate the state points of the respective stages of the gas in the regeneration system 20. As shown in fig. 3, point a is a point of state when gas (e.g., ambient air) O has just entered the regeneration duct 60 without being heated. At point a, the temperature of the gas O is about 35 ℃ and the moisture content is about 27 g/kg. When the gas O reaches point b after passing through the condenser 45 and being heated by the first stage, the temperature of the gas O at point b is increased, for example, to about 75 ℃, at which point the moisture content is substantially unchanged. Similarly, the gas O reaches point c after further flowing through the condenser 35 and being heated by the second stage. At point c, the temperature of the gas O is further increased, for example, to about 115 ℃ at which the moisture content is substantially unchanged. Then, the gas O is heated by the third stage of the heater 22 and reaches the point d. At point d, the temperature of the gas O is further increased, for example, to about 120 ℃ at which the moisture content is likewise substantially unchanged.

The heating of the gas O is performed from the point a to the point d. As the temperature of the gas O increases, so does the enthalpy. As can be seen from fig. 3, the heating capacities of the heat pump devices 30 and 40 are significantly greater than the heating capacity of the heater 22. Therefore, by using the heat pump device, the energy consumption of the regeneration system of the rotary dehumidification device can be significantly reduced.

The heated gas O enters the regeneration zone R2 of the wheel and entrains moisture in the regeneration zone R2. From the regeneration zone R2 to point e, the moisture content of the gas K increases significantly, for example from about 27g/kg to about 39g/kg, and the temperature decreases, for example from about 120 ℃ to about 50 ℃, due to the adsorption of moisture. It can be seen that the temperature of the gas K at point e is still higher than the temperature of the ambient atmosphere. At this time, if the gas K is directly discharged into the ambient atmosphere, heat loss may result.

The evaporator of the heat pump apparatus can recover the above heat of the gas K to reduce the heat loss. Specifically, gas K flows from point e (gas just exiting the wheel) to point e' (gas is about to enter evaporator 32). Gas (e.g., ambient atmosphere) is introduced between point e and point e' via gas introduction means 81. Therefore, at point e', the total air volume of the gas K increases. Since the temperature and the moisture content of the gas introduced through the gas introduction device 81 are generally smaller than those of the gas at the point e ', both the temperature and the moisture content of the gas K at the point e' are slightly decreased. Gas K continues to flow through evaporator 32 from point e' to point f. Since the total air volume passing through the evaporator 32 is increased, the evaporation temperature of the evaporator 32 can be increased. Accordingly, the temperature and the moisture content of the gas K can be reduced. For example, at point f, the temperature of the gas K is reduced to about the same temperature as at point a, i.e., about 35 ℃, and the moisture content is reduced to about 33 g/kg.

Similarly, gas K flows further from point f (gas just coming out of vaporizer 32) to point f' (gas is about to enter vaporizer 42). Gas (e.g., ambient atmosphere) is introduced between point f and point f' via gas introduction means 82. Therefore, at the point f', the total air volume of the gas K further increases. At this time, the temperature of the gas introduced through the gas introduction device 82 is close to the ambient temperature, and the moisture content is generally smaller than that of the gas at the f point, so that the temperature of the gas K at the f' point is hardly changed, and the moisture content is decreased. The gas K continues to flow through the evaporator 42 from point f' to point g. Since the total air volume passing through the evaporator 42 is increased, the evaporation temperature of the evaporator 42 can be increased. Accordingly, the temperature and the moisture content of the gas K can be reduced. For example, at the g-point the temperature of the gas K is further reduced, for example to about 29 ℃ and the moisture content is reduced to about 24 g/kg. That is, the temperature and moisture content of the gas K at the g-point are both lower than those at the a-point.

From point e to point g, the enthalpy of the gas K decreases continuously in a gradient manner, even lower than the enthalpy of the gas O initially introduced at point a. It is apparent that the regeneration system 20 shown in fig. 2 can more fully recover the heat of the gas by introducing the external gas upstream of the evaporator. In addition, the recovered heat can improve the heating capacity of the heat pump device at the condenser, so that the energy consumption of the rotary wheel dehumidification device can be further reduced, and the efficiency of the rotary wheel dehumidification device can be improved.

The regeneration system 20 according to the present invention is described above with reference to the example of fig. 2. It should be understood that the structure of the regeneration system according to the present invention is not limited to the specific example shown in fig. 2, but may be changed as long as it can introduce the outside air upstream of the evaporator of the heat pump apparatus. For example, a gas introduction device is provided separately for each stage of the heat pump device in the example shown in fig. 2, but the arrangement of the gas introduction devices may be changed as needed. Modified examples of the regeneration system will be described below with reference to fig. 4 to 7.

Fig. 4 shows a regeneration system 20A with a modified gas introduction device. In fig. 4, the same components of the regeneration system 20A as those of the regeneration system 20 are denoted by the same reference numerals, and thus, the description will not be repeated. Hereinafter, portions of the regeneration system 20A different from the regeneration system 20 will be explained.

As shown in fig. 4, in the regeneration system 20A, a gas introduction device 81A is provided only between the evaporator 32 and the runner. The external gas introduced via the gas introduction device 81A can act on both the evaporators 32 and 42 as described above. In contrast, in the regeneration system 20, the gas introduction device 82 does not function with the evaporator 32.

Preferably, the gas introduction device 81A may be configured to be able to adjust the amount of gas introduced. In this way, the amount of gas introduced may be adjusted according to the heat pump system selected for operation (e.g., selecting one or both of the heat pump systems to operate).

Fig. 5 shows the psychrometric chart of the gas when only the heat pump system 30 is operated and the gas introduction device 81A is opened. As shown in fig. 5, since the heat pump system 40 is not operated, the state of the gas O at the point a is the same as that at the point b, and the state of the gas K at the point f is the same as that at the point g.

The gas O is heated via the condenser 35 and the heater 22 to a desired regeneration temperature, for example, about 103 ℃. During this heating, the moisture content of the gas O is substantially unchanged.

The gas O reaches point e after flowing through the regeneration zone R2 of the wheel. At point e, the temperature of the gas K decreases, for example to about 45 ℃, while the moisture content increases, for example to 39 g/kg.

Gas K flows from point e (gas just exiting the wheel) to point e' (gas is about to enter the evaporator 32). Gas (e.g., ambient atmosphere) is introduced between point e and point e' via gas introduction means 81A. Therefore, at point e', the total air volume of the gas K increases. Since the temperature and the moisture content of the gas introduced through the gas introduction device 81A are generally smaller than those of the gas at the point e ', both the temperature and the moisture content of the gas K at the point e' are slightly decreased. Gas K continues to flow through evaporator 32 from point e' to point f (or point g). Since the total air volume passing through the evaporator 32 is increased, the evaporation temperature of the evaporator 32 can be increased. Accordingly, the temperature and the moisture content of the gas K can be reduced. For example, at point f (or point g), the temperature of the gas K is reduced to about 29 ℃ and the moisture content is reduced to about 24 g/kg.

The regeneration system 20A, like the regeneration system 20, can sufficiently recover the heat of the gas by introducing the external gas upstream of the evaporator, and can also increase the heating capacity of the heat pump device to reduce the energy consumption of the rotary dehumidification device and increase the efficiency of the rotary dehumidification device.

Fig. 6 shows a regeneration system 20B with a modified gas introduction device. In fig. 6, the same components of the regeneration system 20B as those of the regeneration system 20 are denoted by the same reference numerals, and thus the description will not be repeated. Hereinafter, a portion of the regeneration system 20B different from the regeneration system 20 will be explained.

As shown in fig. 6, in the regeneration system 20B, a gas introduction device 82B is provided only between the evaporators 32 and 42. The external gas introduced via the gas introduction device 82B acts only on the evaporator 42 as described above.

Figure 7 shows the psychrometric chart of the gas with only the heat pump system 40 operating and the gas introduction device 82B open. As shown in fig. 7, since the heat pump system 30 is not operated, the state of the gas O at the point b is the same as that at the point c, and the state of the gas K at the point e is the same as that at the point f.

The gas O is heated via the condenser 45 and the heater 22 to a desired regeneration temperature, for example, about 83 ℃. During this heating, the moisture content of the gas O is substantially unchanged.

The gas O reaches point e after flowing through the regeneration zone R2 of the wheel. At point e, the temperature of the gas K decreases, for example to about 45 ℃, while the moisture content increases, for example to 37 g/kg.

Gas K flows from point e (or f) to point f' (gas is about to enter vaporizer 42). Gas (e.g., ambient atmosphere) is introduced between point f and point f' via gas introduction means 82B. Therefore, at the point f', the total air volume of the gas K increases. Since the temperature and the moisture content of the gas introduced through the gas introduction device 82B are generally smaller than those at the point e (or the point f), both the temperature and the moisture content of the gas K at the point f' are decreased. The gas K continues to flow through the evaporator 42 from point f' to point g. Since the total air volume passing through the evaporator 42 is increased, the evaporation temperature of the evaporator 42 can be increased. Accordingly, the temperature and the moisture content of the gas K can be reduced. For example, at the g-point, the temperature of the gas K is reduced to about 27 ℃ and the moisture content is reduced to about 24 g/kg.

The regeneration system 20B, like the regeneration system 20, can sufficiently recover the heat of the gas by introducing the outside air upstream of the evaporator 42, and can also increase the heating capacity of the heat pump device 40 to reduce the energy consumption of the rotary dehumidification device and increase the efficiency of the rotary dehumidification device.

Fig. 8 is a flowchart of a heat recovery method 200 of a regeneration system of a rotating wheel dehumidification device according to an embodiment of the present invention. As shown in fig. 8, when the rotary dehumidification apparatus 100 is operated, the heat pump device in the regeneration system is operated, see step S220.

In the case where the rotary dehumidification apparatus 100 includes two or more heat pump devices, the heat pump device to be operated, for example, the heat pump device 30 or 40, or both the heat pump devices 30 and 40 may be determined or selected according to, for example, the target regeneration temperature (step S210) before step S220.

In step S230, the operating heat pump device heats the gas O by means of its condenser. For example, the heat pump apparatus heats the gas O to a desired temperature by means of a condenser. The required temperature refers to a regeneration temperature at which the runner R can be regenerated, or a temperature at which the gas O can reach the regeneration temperature via a subsequent heating device.

At step S250, the gas introduction means is turned on to introduce external gas into the regeneration duct, thereby increasing the amount of air passing through the evaporator of the heat pump device and thus improving heat recovery efficiency and heating capacity.

In the case where there are a plurality of heat pump apparatuses (for example, the heat pump apparatuses 30 and 40), a gas introduction apparatus (for example, the gas introduction apparatus 81 or 82, or both the gas introduction apparatuses 81 and 82) to be turned on may be determined or selected, see step S240. The gas introduction device to be turned on may be determined or selected according to the heat pump device to be operated determined or selected in step S210.

At step S270, heat of the discharged gas K is recovered by the refrigerant in the evaporator. The recovered heat can further increase the heating capacity of the heat pump apparatus, that is, the heat releasing capacity of the condenser, thereby increasing the heating temperature of the gas O.

The gas introduction means may be adjusted to vary the amount of the introduced external gas according to the temperature of the discharged gas K when it enters the ambient atmosphere (may be referred to as a discharge temperature) and/or the heating temperature of the introduced gas O, see step S260. For example, when the discharge temperature of the gas K is high or the heating temperature of the gas O is low, the gas introduction device may be adjusted so that the amount of introduced external gas is increased. Conversely, when the discharge temperature of the gas K is low or the heating temperature of the gas O is high (for example, exceeds the target regeneration temperature), the gas introduction device may be adjusted so that the amount of the introduced external gas is reduced.

In addition, in order to more stably control the operation of the wheel dehumidification device, a time threshold may be considered. For example, when the heating temperature of the gas O is low and continues for a predetermined time, the gas introduction means is readjusted so that the amount of the introduced outside gas increases. For example, when the heating temperature of the gas O is high for a predetermined time, the gas introducing means is readjusted so that the amount of the introduced external gas is reduced. When the gas O is not in these two conditions, the gas introduction device may not be adjusted.

In the above heat recovery method, the amount of air passing through the evaporator is increased by introducing the external air, thereby increasing the evaporation temperature. Like the above-described rotary dehumidification apparatus, the heat recovery method also improves the heat recovery efficiency of the discharged gas. In addition, the heat recovery method can also improve the heating capacity of the heat pump device, thereby reducing the energy consumption of the rotary dehumidification device and improving the energy efficiency of the rotary dehumidification device.

It should be understood that the heat recovery methods described above are not limited to the specific examples described herein or shown in the figures, but may be varied. For example, certain steps of the heat recovery method shown in fig. 8 may be omitted, as desired. Further, the steps of the heat recovery method shown in fig. 8 should not be limited to the order shown in the drawings, but may be changed without contradiction.

Although exemplary embodiments of the present invention have been described in detail, it should be understood that the present invention is not limited to the particular embodiments described and illustrated in detail above. Numerous modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the invention. All such variations and modifications are intended to fall within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent components.

Claims (9)

1. A regeneration system for a rotary wheel dehumidification apparatus, the regeneration system comprising:

a regeneration duct in which gas flows through a regeneration region of a wheel of the wheel dehumidification device to regenerate the regeneration region;

a heat pump device including an evaporator provided in the regeneration duct, the evaporator being located downstream of the runner in a gas flow direction, and being configured to cause refrigerant in the evaporator to absorb heat from the gas; and

a gas introduction device configured to introduce external gas into the regeneration duct and positioned between the runner and the evaporator.

2. The regeneration system of claim 1, wherein the heat pump device further comprises a condenser disposed in the regeneration duct, the condenser being located upstream of the wheel in the gas flow direction, and being configured to heat the gas with refrigerant in the condenser.

3. The regeneration system according to claim 2, comprising two or more of the heat pump devices, the condensers and evaporators of which are arranged in sequence upstream and downstream of the runner, respectively, in the gas flow direction, thereby heating the gas and absorbing heat from the gas, respectively, in a gradient manner.

4. The regeneration system according to claim 3, wherein the gas introduction device is provided for each evaporator, the gas introduction device being provided between the runner and an evaporator adjacent to the runner or between adjacent evaporators.

5. The regeneration system of any one of claims 1 to 4, wherein the gas introduction means comprises a valve.

6. The regeneration system of claim 5, wherein the valve comprises an on-off valve or an adjustable valve.

7. The regeneration system of claim 5, wherein the valve is manually or electrically adjustable.

8. The regeneration system according to any one of claims 1 to 4, comprising a plurality of the gas introduction devices arranged along an axial direction and/or a circumferential direction of the regeneration duct.

9. A rotating wheel dehumidification apparatus, comprising a regeneration system according to any one of claims 1 to 8.

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