Rotary dehumidification heat recovery system and control method thereof

Abstract

The present application relates to the technical field of rotary dehumidification, and particularly provides a rotary dehumidification heat recovery system and a control method thereof, aiming to solve the problem of low reliability and fault tolerance of the existing rotary dehumidification system. To this end, the rotary dehumidification heat recovery system comprises a rotary wheel, a medium-temperature water heat pump system, a high-temperature air heat pump system, a dehumidification air path and a regeneration air path. The medium-temperature water heat pump system comprises at least two subsystems, and each subsystem comprises an evaporator and a condenser. The high-temperature air heat pump system comprises at least two subsystems, and each subsystem comprises an evaporator and a condenser. The evaporator of the medium-temperature water heat pump system is arranged in the dehumidification air path, the condenser of the high-temperature air heat pump system is arranged in the regeneration air path, and the condenser of the medium-temperature water heat pump system is configured to exchange heat with the evaporator of the high-temperature air heat pump system. The present application has the effects of high reliability and high fault tolerance.

Description

Technical Field

[0001] This invention relates to the field of rotary dehumidification technology, specifically providing a rotary dehumidification heat recovery system and its control method. Background Technology

[0002] Rotary dehumidification systems require a large amount of heat for rotor regeneration, typically through electric heating or steam heating. Both of these methods have high operating costs. Currently, there are technical solutions that utilize heat pumps to recover heat from the regeneration exhaust air and the adsorption heat on the treatment side. Compared to ordinary electric heating methods or heating methods that use gas or electric heating to generate steam, these solutions offer significant energy savings.

[0003] However, rotary dehumidification systems still suffer from low fault tolerance and reliability. When the heat pump system malfunctions or requires maintenance, the rotary dehumidification system cannot operate stably and normally.

[0004] Therefore, in view of the problems existing in the above-mentioned prior art, those skilled in the art urgently need a rotary dehumidification heat recovery system and its control method that can operate stably and efficiently with high reliability and fault tolerance. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problems of low reliability and fault tolerance in existing rotary dehumidification systems.

[0006] In a first aspect, the present invention provides a rotary dehumidification heat recovery system, comprising a rotary wheel, a medium-temperature water heat pump system, a high-temperature air heat pump system, a dehumidification air path, and a regeneration air path; the medium-temperature water heat pump system comprises at least two subsystems, each subsystem comprising an evaporator and a condenser; the high-temperature air heat pump system comprises at least two subsystems, each subsystem comprising an evaporator and a condenser; the evaporator of the medium-temperature water heat pump system is disposed in the dehumidification air path, and the condenser of the high-temperature air heat pump system is disposed in the regeneration air path; and the condenser of the medium-temperature water heat pump system is configured to exchange heat with the evaporator of the high-temperature air heat pump system.

[0007] With the above technical solution, all evaporators of the medium-temperature water heat pump system of the present invention are arranged in the dehumidification air path. The evaporators of the medium-temperature water heat pump system can absorb heat in the dehumidification air path and transfer the heat to the condenser through the refrigerant. The evaporators of the high-temperature air heat pump system can exchange heat with the condensers of the medium-temperature water heat pump system and then transfer the heat to the condensers of the high-temperature air heat pump system through the refrigerant. All condensers of the high-temperature air heat pump system are arranged in the regeneration air path to heat the flowing air. Thus, the present invention can realize the recovery of heat, including adsorption heat, from the dehumidification air path to the regeneration air path. Furthermore, both the medium-temperature water heat pump system and the high-temperature air heat pump system adopt a scheme including two or more subsystems. When some subsystems fail and shut down or require maintenance, the remaining subsystems can still ensure the stable and normal operation of the entire system. Therefore, the rotary dehumidification system of the present invention has the effects of high reliability and high fault tolerance.

[0008] Furthermore, the system also includes a water circulation system, in which the condenser of the medium-temperature water heat pump system and the evaporator of the high-temperature air heat pump system are both disposed in the water circulation system for circulating heat exchange.

[0009] With the above technical solution adopted, the present invention provides a specific structure for heat exchange between the condenser of a medium-temperature water heat pump system and the evaporator of a high-temperature air heat pump system; by setting up a water circulation system, good heat exchange effect between the two can be guaranteed.

[0010] Furthermore, the impeller includes a first impeller and a second impeller, both of which include a dehumidification zone and a regeneration zone; the dehumidification zone of the first impeller, the evaporator of the medium-temperature water heat pump system, and the dehumidification zone of the second impeller are sequentially arranged in the dehumidification air path along the direction of airflow; the regeneration zone of the second impeller, the condenser of the high-temperature air heat pump system, and the regeneration zone of the first impeller are sequentially arranged in the regeneration air path along the direction of airflow.

[0011] When adopting the above technical solution, the first and second impellers of the present invention can adopt a structure with two partitions. It is understood that the impellers of the present invention can also adopt a structure with three partitions, namely, a dehumidification zone, a cooling zone and a regeneration zone.

[0012] Furthermore, the medium-temperature water heat pump system includes a first heat pump subsystem and a second heat pump subsystem, and the high-temperature air heat pump system includes a third heat pump subsystem and a fourth heat pump subsystem; the first heat pump subsystem includes a first evaporator, and the second heat pump subsystem includes a second evaporator; the first evaporator and the second evaporator are connected in parallel in the dehumidification air path so that the air from the dehumidification zone of the first rotor can pass through the first evaporator and the second evaporator simultaneously; the third heat pump subsystem includes a third condenser, and the fourth heat pump subsystem includes a fourth condenser; the third condenser and the fourth condenser are connected in series in the regeneration air path so that the air from the regeneration zone of the second rotor passes through the third condenser and the fourth condenser sequentially.

[0013] Furthermore, it also includes a medium-temperature air heat pump system, which includes a fifth evaporator and a fifth condenser; the fifth evaporator is disposed in the regeneration air path and located on the air outlet side of the regeneration zone of the first rotor; the fifth condenser is disposed in the regeneration air path and located between the air outlet side of the regeneration zone of the second rotor and the third condenser.

[0014] With the above technical solution adopted, the present invention can recover the waste heat of the regenerated exhaust air through the medium-temperature air heat pump system and use it to increase the inlet air temperature of the third condenser of the third heat pump subsystem.

[0015] Furthermore, the water circulation system includes a return water branch, an outlet water branch, a water tank, a water pump, a return water temperature sensor, and an outlet water temperature sensor; the two ends of the return water branch are respectively connected to the outlet end of the evaporator of the high-temperature air-heat pump system and the inlet end of the condenser of the medium-temperature water-heat pump system; the two ends of the outlet water branch are respectively connected to the outlet end of the condenser of the medium-temperature water-heat pump system and the inlet end of the evaporator of the high-temperature air-heat pump system; the water tank, the water pump, and the return water temperature sensor are sequentially arranged in the return water branch along the direction of water flow; the outlet water temperature sensor is arranged in the outlet water branch.

[0016] In a second aspect, the present invention also provides a control method for a dual-rotor dehumidification heat recovery system, wherein the rotor dehumidification heat recovery system includes a rotor, a medium-temperature water heat pump system, a high-temperature air heat pump system, a dehumidification air path, a regeneration air path, and a water circulation system; the medium-temperature water heat pump system includes at least two subsystems, each subsystem including an evaporator and a condenser; the high-temperature air heat pump system includes at least two subsystems, each subsystem including an evaporator and a condenser; the evaporator of the medium-temperature water heat pump system is disposed in the dehumidification air path; the condenser of the high-temperature air heat pump system is disposed in the regeneration air path; both the condenser of the medium-temperature water heat pump system and the evaporator of the high-temperature air heat pump system are disposed in the water circulation system. The system performs circulating heat exchange. The control method includes: acquiring the target water temperature of the water circulation system; detecting whether all subsystems of the medium-temperature water heat pump system can operate normally; if yes, setting the number of operating subsystems in the medium-temperature water heat pump system according to the target water temperature; if no, operating the operating subsystems in the medium-temperature water heat pump system according to the target water temperature; acquiring the water temperature detection value of the water circulation system; detecting whether all subsystems of the high-temperature air heat pump system can operate normally; if yes, setting the number of operating subsystems in the high-temperature air heat pump system according to the water temperature detection value; if no, operating the operating subsystems in the high-temperature air heat pump system according to the water temperature detection value.

[0017] By adopting the above technical solution, the present invention provides a reliable, stable, and efficient control method; under the condition that all subsystems can operate normally, the target number of subsystems to be operated can be set; and it can adapt to year-round operating conditions, adjusting the processing air volume according to different seasons, such as winter or summer, and enabling the heat pump system to operate at the highest energy efficiency through control program settings; when some subsystems fail and shut down or require maintenance and repair, the operation of the remaining subsystems is controlled, thereby improving the reliability and fault tolerance of the entire system.

[0018] Furthermore, the step of "setting the number of operating subsystems in the medium-temperature water heat pump system according to the target water temperature" specifically includes: determining the sum of the target operating frequencies of the subsystems in the medium-temperature water heat pump system according to the target water temperature; and setting the number of operating subsystems in the medium-temperature water heat pump system according to the sum of the target operating frequencies.

[0019] Furthermore, the step of "setting the number of subsystems in the medium-temperature water heat pump system based on the sum of the target operating frequencies" specifically includes: the medium-temperature water heat pump system includes two subsystems and the target number of subsystems is N; a preset frequency matrix F = [f1 f2 f3 f4], where f1 > f2 > f3 > f4; the sum of the target operating frequencies is fd; when fd ≥ f1, N = 2; when f2 ≤ fd < f1, N maintains the current number of operating frequencies; when f3 ≤ fd < f2, N = 1; when f4 ≤ fd < f3, N maintains the current number of operating frequencies; when fd < f4, N = 0.

[0020] When the above technical solution is adopted, the sum of the target operating frequencies of the present invention is preferentially controlled by the target return water temperature. When the return water temperature sensor fails, the target outlet water temperature can also be used for control. Both the target return water temperature and the target outlet water temperature are set values. Furthermore, based on the relationship between the target operating frequency and the preset frequency matrix, the target number of subsystems in the medium-temperature water heat pump system is set, so that the medium-temperature water heat pump system can operate with the highest energy efficiency under different conditions.

[0021] Furthermore, the step of "setting the number of subsystems in operation in the high-temperature air-heat pump system according to the water temperature detection value" specifically includes: the high-temperature air-heat pump system includes two subsystems and the target number of subsystems in operation is M; a preset temperature matrix T = [T1 T2 T3 T4], and T1 > T2 > T3 > T4; the water temperature detection value is Tw; when Tw ≥ T1, M = 2; when T2 ≤ Tw < T1, M maintains the current number of operations; when T3 ≤ Tw < T2, M = 1; when T4 ≤ Tw < T3, M maintains the current number of operations; when Tw < T4, M = 0.

[0022] When the above technical solution is adopted, the high-temperature air heat pump system of the present invention prioritizes the control of the return water temperature detection value. Based on the relationship between the return water temperature detection value and the preset temperature matrix, the number of subsystems in operation in the high-temperature air heat pump system is set so that the high-temperature air distribution pump system operates at the highest energy efficiency.

[0023] When the above technical solution is adopted, the beneficial effects of the present invention are:

[0024] (1) The outdoor fresh air of the present invention generates adsorption heat after passing through the dehumidification zone of the first rotor. The medium-temperature water heat pump system recovers the heat of the dehumidification air path and uses its condenser to transfer the heat to water. The generated medium-temperature water is used as the heat source of the high-temperature air heat pump system. The medium-temperature air heat pump system recovers the waste heat of the regenerated exhaust air to increase the air inlet temperature of the condenser of the high-temperature air heat pump system. The evaporator of the high-temperature air heat pump system absorbs the heat of the medium-temperature water and uses its condenser to further heat the air in the regeneration air path to obtain high-temperature air to dry and regenerate the regeneration zone of the first rotor, so that the first rotor always maintains a high moisture absorption efficiency.

[0025] (2) Both the medium-temperature water heat pump system and the high-temperature air heat pump system of the present invention adopt a layout structure of two or more subsystems, which has high system reliability and high fault tolerance. When one of the two subsystems of the medium-temperature water heat pump system fails or needs maintenance, the other can continue to operate, and thus the high-temperature air heat pump system can continue to operate. Similarly, when one of the two subsystems of the high-temperature air heat pump system fails or needs maintenance, the other can continue to operate, and thus the medium-temperature water heat pump system can continue to operate. Thus, the entire rotary dehumidification heat pump system can meet the high reliability required for industrial applications and achieve maintenance without stopping the machine.

[0026] (3) Both the medium-temperature water heat pump system and the high-temperature air heat pump system of the present invention can set the target number of subsystems to adapt to the winter and summer working conditions of dual-rotor dehumidification. The air volume handled in winter is about half that handled in summer. Through certain control program settings, the heat pump system can operate with optimal energy efficiency.

[0027] (4) The condenser of the medium-temperature water heat pump system and the evaporator of the high-temperature air heat pump system of the present invention form a circulation loop through the return water branch and the outlet water branch for circulating heat exchange. The water circulation system is equipped with a water tank and a circulating water pump, which can significantly improve the heat exchange efficiency of the system. Furthermore, the target number of subsystems of the medium-temperature water heat pump system and the high-temperature air heat pump system is controlled by prioritizing the target return water temperature and the return water temperature detection value, which can maximize the energy saving rate of the system.

[0028] (5) The subsystems of the medium-temperature water heat pump system of the present invention adopt a parallel structure and are controlled at the same frequency, which can increase the processing air volume of the dehumidification air path. Those skilled in the art can specifically choose to process the large air volume through the evaporators of the two subsystems at the same time, or they can choose to process it through the evaporator of one of the subsystems. Furthermore, the target number of subsystems is set according to the sum of the target operating frequencies. Through the above control logic, the compressor operating frequency of the medium-temperature water heat pump system can be controlled within a reasonable and efficient operating range, thereby improving the overall energy efficiency of the unit throughout the year.

[0029] (6) The regeneration air path of the present invention is provided with a condenser of a medium-temperature air heat pump system and two condensers of a high-temperature air heat pump system connected in series. The air in the regeneration air path passes through the above-mentioned condensers for heat exchange, and the temperature of the air increases in sequence. Furthermore, the target number of subsystems of the high-temperature air heat pump system is set according to the return water temperature detection value, which can control the compressor operating frequency of the high-temperature air heat pump system within a reasonable and efficient operating range, thereby improving the overall energy efficiency of the unit throughout the year. Attached Figure Description

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0031] Figure 1 This is a schematic diagram of the rotary dehumidification and heat recovery system of the present invention;

[0032] Figure 2 This is a flowchart of the main steps of the control method of the present invention.

[0033] List of reference numerals :

[0034] 10-Dehumidification air path; 20-Regeneration air path; 30-First impeller; 40-Second impeller; 50-Medium-temperature water heat pump system; 60-High-temperature air heat pump system; 70-Medium-temperature air heat pump system; 80-Water circulation system; 501-First evaporator; 502-Second evaporator; 503-First condenser; 504-Second condenser; 601-Third evaporator; 602-Fourth evaporator; 603-Third condenser; 604-Fourth condenser; 701-Fifth evaporator; 702-Fifth condenser; 703-Condensing temperature sensor; 801-Return water branch; 802-Outlet water branch; 803-Water tank; 804-Water pump; 805-Return water temperature sensor; 806-Outlet water temperature sensor. Detailed Implementation

[0035] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments given are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications. For example, although the rotary dehumidification heat recovery system described in the specification uses two rotary wheels, the rotary dehumidification system of the present invention can obviously also use one rotary wheel for dehumidification. Such changes in application do not deviate from the basic principles of the present invention and therefore fall within the protection scope of the present invention.

[0036] It should be noted that in the description of this invention, terms such as "upper" and "lower" indicating directional or positional relationships are based on the directional or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set up" and "connected" 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 invention according to the specific circumstances.

[0038] like Figure 1 The diagram shown is a schematic of a rotary dehumidification heat recovery system. The rotary dehumidification heat recovery system of this invention adopts a dual-rotor dehumidification structure, including a first rotor 30 and a second rotor 40. Figure 1 The upper part of the first rotor 30 and the upper part of the second rotor 40 are the regeneration zone, and the lower part of the first rotor 30 and the lower part of the second rotor 40 are the dehumidification zone; and Figure 1 The direction of airflow in the dehumidification air path 10 and the regeneration air path 20 is indicated by the label;

[0039] The outdoor fresh air in the dehumidification air path 10 is dehumidified twice, passing through the dehumidification zones of the first rotor 30 and the second rotor 40.

[0040] The medium-temperature water heat pump system 50 includes two subsystems, wherein the first heat pump subsystem includes a first evaporator 501, a first condenser 503, a compressor and a throttle valve; and the second heat pump subsystem includes a second evaporator 502, a second condenser 504, a compressor and a throttle valve.

[0041] The first evaporator 502 and the second evaporator 502 are arranged in parallel in the dehumidification air duct 10 with an upper and lower structure, and are located between the dehumidification zones of the first impeller 30 and the second impeller 40. Outdoor fresh air enters the dehumidification air duct 10 and undergoes the first dehumidification in the dehumidification zone of the first impeller 30. Then, it can pass through the first evaporator 501 and the second evaporator 502 simultaneously, or it can pass through the first evaporator 501 or the second evaporator 502 alone. After passing through the dehumidification zone of the second impeller 40 for the second dehumidification, it is then supplied to the room. The first condenser 503 and the second condenser 504 are located in the water circulation system 80 to heat water to obtain medium-temperature water.

[0042] Continue reading Figure 1 In the regeneration air path 20 of the present invention, the air passes through the regeneration zones of the second rotor 40 and the first rotor 30 in sequence for regeneration.

[0043] The high-temperature air heat pump system 60 includes two subsystems: the third heat pump subsystem includes a third evaporator 601, a third condenser 603, a compressor, and a throttling valve; the fourth heat pump subsystem includes a fourth evaporator 602, a fourth condenser 604, a compressor, and a throttling valve.

[0044] The third condenser 603 and the fourth condenser 604 are arranged in series in the regeneration air path 20 and are located between the regeneration zone of the first impeller 30 and the regeneration zone of the second impeller 40. The air in the regeneration air path 20 passes through the regeneration zone of the second impeller 40, and then passes through the third condenser 603 and the fourth condenser 604 in sequence to raise the temperature of the air to obtain high-temperature air. The high-temperature air passes through the regeneration zone of the first impeller 30 for drying and regeneration, so that the first impeller 30 can always maintain a high dehumidification efficiency.

[0045] The third evaporator 601 and the fourth evaporator 604 are located in the water circulation system 80 and use medium-temperature water as a heat source for heat recovery.

[0046] As a preferred embodiment of the present invention, the rotary dehumidification heat recovery system of the present invention further includes a medium-temperature air heat pump system 70, which includes a fifth evaporator 701, a fifth condenser 702, a compressor, and a throttling valve.

[0047] The fifth evaporator 701 is located on the air outlet side of the regeneration zone of the first rotor 30, and is used to recover waste heat from the regeneration exhaust air. The fifth condenser 702 is located between the air outlet side of the regeneration zone of the second rotor 40 and the third condenser 603, and uses the medium-temperature air generated by heating the air by the fifth condenser 702 as the air inlet of the third condenser 603. That is to say, the air in the regeneration air path 20 of the present invention flows sequentially through the fifth condenser 702, the third condenser 603 and the fourth condenser 604 to be heated to obtain high-temperature air.

[0048] As a preferred embodiment of the present invention, the water circulation system 80 of the present invention includes a return water branch 801, an outlet water branch 802, a water tank 803, a water pump 804, a return water temperature sensor 805, and an outlet water temperature sensor 806.

[0049] After the outlet ends of the first condenser 503 and the second condenser 504 are connected, they continue to be connected to the inlet ends of the third evaporator 601 and the fourth evaporator 602 through the water outlet branch 802.

[0050] After the outlet ends of the third evaporator 601 and the fourth evaporator 602 are connected, they continue to be connected to the inlet ends of the first condenser 503 and the second condenser 504 through the return water branch 801.

[0051] Figure 1 The label indicates the direction of water flow in the water circulation system 80;

[0052] Water flows out from the outlet ends of the first condenser 503 and the second condenser 504, flows to the third evaporator 601 and the fourth evaporator 602 through the water outlet branch 802, and then flows out from the outlet ends of the third evaporator 601 and the fourth evaporator 602, flows back to the first condenser 503 and the second condenser 504 through the water return branch 801; thus forming a circulating water circuit for circulating heat exchange.

[0053] In the return water branch 801, a water tank 803, a water pump 804, and a return water temperature sensor 805 are arranged sequentially along the direction of water flow. An outlet water temperature sensor 806 is arranged on the outlet water branch 802. The return water temperature sensor 805 is used to measure the return water temperature, and the outlet water temperature sensor 806 is used to measure the outlet water temperature. The return water temperature detection value and the outlet water temperature detection value can be used to control the target number of subsystems operating in the high-temperature air heat pump system 60 in the control method.

[0054] As a preferred embodiment of the present invention, such as Figure 1 As shown, the second rotor 40 includes three zones, from top to bottom: a dehumidification zone, a cooling zone, and a regeneration zone;

[0055] After passing through the first evaporator 501 and / or the second evaporator 502, the air is divided into two paths. One path continues through the dehumidification zone of the second rotor 40; the other path enters the regeneration air path 20 and flows through the cooling zone and regeneration zone of the second rotor 40 in sequence.

[0056] As a preferred embodiment of the present invention, the medium-temperature air heat pump system 70 of the present invention further includes a condensing temperature sensor 703, which is disposed on the middle coil of the fifth condenser 702 to detect the condensing temperature of the fifth condenser 702; the compressor operating frequency of the medium-temperature air heat pump system 70 is controlled by the condensing temperature sensor 703.

[0057] In a preferred embodiment of the present invention, the system further includes an outlet air temperature sensor disposed on the outlet side of the fourth condenser 604; and corresponding temperature sensors are disposed on the inlet side and outlet side of the first condenser 501 and the second condenser 502.

[0058] This invention also discloses a control method for a rotary dehumidification heat recovery system, such as... Figure 2 The diagram shows the main steps of the control method, including the following steps:

[0059] Step S11: Obtain the target water temperature of the water circulation system 80;

[0060] Step S12: Check whether all subsystems of the medium-temperature water heat pump system 50 are operating normally;

[0061] Step S13, if yes, then set the number of operating subsystems in the medium-temperature water heat pump system 50 according to the target water temperature;

[0062] Step S14: If not, then operate the subsystem that can operate in the medium-temperature water heat pump system 50 according to the target water temperature;

[0063] Step S21: Obtain the water temperature detection value of the water circulation system 80. The preferred water temperature detection value is the return water temperature detection value. When the return water temperature sensor fails, the outlet water temperature detection value can be used.

[0064] Step S22: Check whether all subsystems of the high-temperature air heat pump system 60 are operating normally;

[0065] Step S23: If yes, then set the number of operating subsystems in the high-temperature air heat pump system 60 according to the water temperature detection value;

[0066] Step S24: If not, then run the subsystems that can operate in the high-temperature air heat pump system 60 according to the water temperature detection value.

[0067] In a preferred embodiment of the present invention, step S13, "setting the number of operating subsystems in the medium-temperature water heat pump system 50 according to the target water temperature," specifically includes:

[0068] The sum of the target operating frequencies of the 50 subsystems in the medium-temperature water heat pump system is determined based on the target water temperature; the number of operating subsystems in the 50-system medium-temperature water heat pump system is set based on the sum of the target operating frequencies.

[0069] It should be noted that the sum of the target operating frequencies is preferentially controlled by the target return water temperature, and the target outlet water temperature can be used for control when the return water temperature sensor fails.

[0070] As a preferred embodiment of the present invention, the step of "setting the number of operating subsystems in the medium-temperature water heat pump system 50 according to the sum of target operating frequencies" specifically includes:

[0071] The medium-temperature water heat pump system 50 includes two subsystems and the target number of subsystems is N; the preset frequency matrix F = [f1 f2 f3 f4], and f1 > f2 > f3 > f4; the sum of the target operating frequencies is fd, where the target operating frequency refers to the operating frequency of the compressor;

[0072] When fd≥f1, N=2;

[0073] When f2≤fd<f1, N maintains the current number of running programs;

[0074] When f3≤fd<f2, N=1;

[0075] When f4≤fd<f3, N maintains the current number of running programs;

[0076] When fd < f4, N = 0.

[0077] In one specific embodiment, the recommended values ​​for f1 in the preset frequency matrix F are 80Hz, f2 is 60Hz, f3 is 40Hz, and f4 is 20Hz.

[0078] When fd≥80Hz, the target number of operating systems N=2, meaning that both subsystems are in operation and the two subsystems are controlled at the same frequency.

[0079] When 60Hz≤fd<80Hz, the target number of running N remains the same as the current number of running. One case is that the sum of the target running frequencies fd decreases from greater than or equal to 80Hz to between 60Hz and 80Hz. In this case, the current number of running is 2, and the target number of running N remains unchanged at 2.

[0080] Another scenario is that the sum of the target operating frequencies fd increases from less than 60Hz to between 60Hz and 80Hz. In this case, the current number of running frequencies is 1, while the target number of running frequencies N remains unchanged at 1.

[0081] When 40Hz≤fd<60Hz, the target number of operations N=1, that is, only one of the two subsystems is running;

[0082] When 20Hz≤fd<40Hz, the target number of running units N remains the same as the current number of running units. One case is that the sum of the target running frequencies fd decreases from greater than or equal to 40Hz to between 20Hz and 40Hz. In this case, the current number of running units is 1, and the target number of running units N remains unchanged at 1. The other case is that the sum of the target running frequencies fd increases from less than 20Hz to between 20Hz and 40Hz. In this case, the current number of running units is 0, and the target number of running units N remains unchanged at 0.

[0083] When fd < 20Hz, the target number of running N = 0.

[0084] It should be noted that the present invention does not impose any restrictions on the frequency values ​​in the preset frequency matrix F; in addition, for the case where the target number of operations N remains the current number of operations, the specific number of operations can be selected or set according to the specific needs of those skilled in the art. For example, when f2≤fd<f1, N is specifically set to 2 or 1; when f4≤fd<f3, N is specifically set to 1.

[0085] In a preferred embodiment of the present invention, step S23, "setting the number of operating subsystems in the high-temperature air-heat pump system 60 according to the water temperature detection value," specifically includes:

[0086] The high-temperature air heat pump system 60 includes two subsystems with a target number of M operating subsystems; the preset temperature matrix is ​​T = [T1 T2 T3 T4], where T1 > T2 > T3 > T4; the water temperature detection value is Tw;

[0087] When Tw ≥ T1, M = 2;

[0088] When T2≤Tw<T1, M maintains the current number of running numbers;

[0089] When T3≤Tw<T2, M=1;

[0090] When T4≤Tw<T3, M maintains the current number of running numbers;

[0091] When Tw < T4, M = 0.

[0092] In one specific embodiment, the recommended value for T1 in the preset temperature matrix T is 50°C, the recommended value for T2 is 40°C, the recommended value for T3 is 35°C, and the recommended value for T4 is 30°C.

[0093] When Tw≥50℃, the target number of operations M=2, meaning that both subsystems are in operation.

[0094] When 40℃≤Tw<50℃, the target number of operations M remains the current number of operations. In one case, the water temperature detection value Tw decreases from greater than or equal to 50℃ to between 40℃ and 50℃. In this case, the current number of operations is 2, and the target number of operations M remains unchanged at 2.

[0095] Another scenario is when the water temperature detection value Tw rises from less than 40℃ to between 40℃ and 50℃. In this case, the current number of operations is 1, while the target number of operations M remains unchanged at 1.

[0096] When 35℃≤Tw<40℃, the target number of operations M=1, that is, only one subsystem is running;

[0097] When 30℃≤Tw<35℃, the target number of operations M remains the current number of operations. One case is when the water temperature detection value Tw decreases from greater than or equal to 35℃ to between 30℃ and 35℃. In this case, the current number of operations is 1, and the target number of operations M remains unchanged at 1.

[0098] Another scenario is when the water temperature detection value Tw rises from less than 30℃ to between 30℃ and 35℃. In this case, the current number of operations is 0, and the target number of operations M remains unchanged at 0.

[0099] When Tw < 30℃, M = 0.

[0100] It should be noted that the present invention does not impose any restrictions on the temperature values ​​in the preset temperature matrix T; in addition, for the case where the target number of operations M remains the current number of operations, the specific number of operations can be selected or set according to the specific needs of those skilled in the art. For example, when T2≤Tw<T1, M is specifically set to 2 or 1; when T4≤Tw<T3, M is specifically set to 1.

[0101] In a preferred embodiment of the present invention, step S14, "operating the subsystems that can operate in the medium-temperature water heat pump system 50 according to the target water temperature," specifically includes:

[0102] The operating frequency f of the subsystems that can operate in the medium-temperature water heat pump system 50 is determined based on the target water temperature, and fmin≤f≤fmax, where fmin is the minimum allowable operating frequency of the subsystem compressor and fmax is the maximum allowable operating frequency of the subsystem compressor.

[0103] In a preferred embodiment of the present invention, step S24, "operating the subsystems that can operate in the high-temperature air-heat pump system 60 according to the water temperature detection value," specifically includes:

[0104] Based on the water temperature detection value, operate the 60 subsystems of the high-temperature air heat pump system that are fault-free or do not require maintenance.

[0105] In summary, this invention provides a heat pump solution that utilizes the waste heat from the exhaust gas regenerated by the rotor and the adsorption heat from the treatment side to provide regenerative heat to a two-stage rotor system. It also provides a control method that maximizes energy efficiency while ensuring system stability. This control method is adaptable to year-round operating conditions. For example, in winter, the target number of operating systems for the medium-temperature water heat pump system and the high-temperature air heat pump system can be set to 1, while in summer, the target number can be set to 2. This ensures that the processing air volume in winter is approximately half that in summer, and through specific program settings, the heat pump system can operate with optimal energy efficiency.

[0106] It should be noted that the above embodiments are only used to illustrate the principle of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the principle of the present invention, those skilled in the art can adjust the above methods so that the present invention can be applied to more specific application scenarios.

[0107] For example, in an alternative embodiment, the first evaporator 501 and the second evaporator 502 of the present invention may also be arranged in series in the dehumidification air path 10.

[0108] For example, in an alternative embodiment, the third condenser 603 and the fourth condenser 604 of the present invention may also be arranged in parallel in the regeneration air path 20.

[0109] For example, in an alternative embodiment, the medium-temperature water heat pump system 50 and the high-temperature air heat pump system 60 of the present invention may further include three subsystems.

[0110] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A rotary dehumidification heat recovery system, the system comprising a rotary wheel, characterized in that, The system further comprises a medium-temperature water heat pump system (50), a high-temperature air heat pump system (60), a dehumidification air path (10) and a regeneration air path (20); The medium-temperature water heat pump system (50) comprises at least two subsystems, and each subsystem comprises an evaporator and a condenser; The high-temperature air heat pump system (60) comprises at least two subsystems, and each subsystem comprises an evaporator and a condenser; The evaporator of the medium-temperature water heat pump system (50) is arranged in the dehumidification air path (10), and the condenser of the high-temperature air heat pump system (60) is arranged in the regeneration air path (20); The condenser of the medium-temperature water heat pump system (50) is configured to exchange heat with the evaporator of the high-temperature air heat pump system (60); The system further comprises a water path circulation system (80), and the condenser of the medium-temperature water heat pump system (50) and the evaporator of the high-temperature air heat pump system (60) are arranged in the water path circulation system (80) to exchange heat; The medium-temperature water heat pump system (50) recovers heat from the dehumidification air path (10), and the condenser of the medium-temperature water heat pump system (50) transmits heat to water to generate medium-temperature water as a heat source of the high-temperature air heat pump system (60); the evaporator of the high-temperature air heat pump system (60) absorbs heat of the medium-temperature water, and the condenser of the high-temperature air heat pump system (60) further heats air of the regeneration air path.

2. The rotary dehumidification heat recovery system of claim 1, wherein, The runner comprises a first runner (30) and a second runner (40), and the first runner (30) and the second runner (40) each comprise a dehumidification zone and a regeneration zone; The dehumidification zone of the first runner (30), the evaporator of the medium-temperature water heat pump system (50) and the dehumidification zone of the second runner (40) are arranged in the dehumidification air path (10) in sequence along the direction of air flow; The regeneration zone of the second runner (40), the condenser of the high-temperature air heat pump system (60) and the regeneration zone of the first runner (30) are arranged in the regeneration air path (20) in sequence along the direction of air flow.

3. The rotary dehumidification heat recovery system of claim 2, wherein, The medium-temperature water heat pump system (50) comprises a first heat pump subsystem and a second heat pump subsystem; the high-temperature air heat pump system (60) comprises a third heat pump subsystem and a fourth heat pump subsystem; The first heat pump subsystem comprises a first evaporator (501), and the second heat pump subsystem comprises a second evaporator (502); the first evaporator (501) and the second evaporator (502) are arranged in parallel in the dehumidification air path (10) to enable air from the dehumidification zone of the first runner (30) to pass through the first evaporator (501) and the second evaporator (502) simultaneously; The third heat pump subsystem comprises a third condenser (603), and the fourth heat pump subsystem comprises a fourth condenser (604); the third condenser (603) and the fourth condenser (604) are arranged in series in the regeneration air path (20) to enable air from the regeneration zone of the second runner (40) to pass through the third condenser (603) and the fourth condenser (604) in sequence.

4. The rotary dehumidification heat recovery system of claim 3, wherein, The system further comprises a medium-temperature air heat pump system (70), which comprises a fifth evaporator (701) and a fifth condenser (702); The fifth evaporator (701) is arranged in the regeneration air path (20) and located on the air outlet side of the regeneration area of the first rotary wheel (30); The fifth condenser (702) is arranged in the regeneration air path (20) and located between the air outlet side of the regeneration area of the second rotary wheel (40) and the third condenser (603).

5. The rotary dehumidification heat recovery system of claim 1, wherein, The water circulation system (80) comprises a return water branch (801), an outlet water branch (802), a water tank (803), a water pump (804), a return water temperature sensor (805) and an outlet water temperature sensor (806); Two ends of the return water branch (801) are connected with the outlet end of the evaporator of the high-temperature air heat pump system (60) and the inlet end of the condenser of the medium-temperature water heat pump system (50) respectively; Two ends of the outlet water branch (802) are connected with the outlet end of the condenser of the medium-temperature water heat pump system (50) and the inlet end of the evaporator of the high-temperature air heat pump system (60) respectively; The water tank (803), the water pump (804) and the return water temperature sensor (805) are arranged in the return water branch (801) in sequence along the water flow direction; The outlet water temperature sensor (806) is arranged in the outlet water branch (802).

6. A control method of a rotary dehumidification heat recovery system, characterized by, The rotary wheel dehumidification heat recovery system comprises a rotary wheel, a medium-temperature water heat pump system (50), a high-temperature air heat pump system (60), a dehumidification air path (10), a regeneration air path (20) and a water circulation system (80); The medium-temperature water heat pump system (50) comprises at least two subsystems, each of which comprises an evaporator and a condenser; the high-temperature air heat pump system (60) comprises at least two subsystems, each of which comprises an evaporator and a condenser; the evaporator of the medium-temperature water heat pump system (50) is arranged in the dehumidification air path (10); the condenser of the high-temperature air heat pump system (60) is arranged in the regeneration air path (20); the condenser of the medium-temperature water heat pump system (50) and the evaporator of the high-temperature air heat pump system (60) are arranged in the water circulation system (80) for circulating heat exchange; The control method comprises: obtaining a target water temperature of the water circulation system (80); detecting whether all the subsystems of the medium-temperature water heat pump system (50) can normally operate; if yes, setting the number of operating subsystems of the medium-temperature water heat pump system (50) according to the target water temperature; if no, operating the subsystems of the medium-temperature water heat pump system (50) that can operate according to the target water temperature; obtaining a water temperature detection value of the water circulation system (80); detecting whether all the subsystems of the high-temperature air heat pump system (60) can normally operate; if yes, setting the number of operating subsystems of the high-temperature air heat pump system (60) according to the water temperature detection value; if no, operating the subsystems of the high-temperature air heat pump system (60) that can operate according to the water temperature detection value.

7. The control method of a rotary dehumidification heat recovery system according to claim 6, characterized by, The step of "setting the number of subsystems in the medium-temperature water heat pump system (50) according to the target water temperature" specifically includes: determining the sum of target operating frequencies of the subsystems in the medium-temperature water heat pump system (50) according to the target water temperature; the target operating frequency refers to the operating frequency of the compressor; setting the number of subsystems in the medium-temperature water heat pump system (50) according to the sum of target operating frequencies.

8. The control method of the rotary dehumidification heat recovery system according to claim 7, characterized by, The step of "setting the number of subsystems in the medium-temperature water heat pump system (50) according to the sum of target operating frequencies" specifically includes: the medium-temperature water heat pump system (50) includes two subsystems and the target number of subsystems is N; a preset frequency matrix F=[f1 f2 f3 f4] is provided, and f1>f2>f3>f4; the sum of target operating frequencies is fd; when fd≥f1, N=2; when f2≤fd when f3≤fd when f4≤fd when fd 9. The control method of the rotary dehumidification heat recovery system according to claim 6, characterized by, The step of "setting the number of subsystems in the high-temperature air heat pump system (60) according to the water temperature detection value" specifically includes: the high-temperature air heat pump system (60) includes two subsystems and the target number of subsystems is M; a preset temperature matrix T=[T1 T2 T3 T4] is provided, and T1>T2>T3>T4; the water temperature detection value is Tw; when Tw≥T1, M=2; when T2≤Tw when T3≤Tw when T4≤Tw when Tw

Images