Energy-saving dehumidifying unit and control method thereof

Abstract

The application provides an energy-saving dehumidifying unit and a control method thereof. The energy-saving dehumidifying unit exchanges heat of exhaust air on the condenser side through a heat pipe section, and heats the exhaust air after heat exchange through an electric heater arranged on the air outlet side of the heat pipe section, so that efficient heat recovery of the exhaust air of the outdoor module is realized in the summer working state, and the problem of high dehumidifying energy consumption of the rotary dehumidifying machine in the prior art is solved. Further, the condenser of the first outdoor module is used to split and exchange heat of the rotary dehumidifying machine, and at the same time, in order to prevent insufficient heat exchange of the condenser, the return air is introduced into the air mixing section to increase the heat exchange amount of the reheated condenser, so that the temperature requirement of the supply air is ensured, the work of the compressor is reduced, and the energy-saving efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of energy-saving dehumidifier technology, specifically to an energy-saving dehumidifier and its control method. Background Technology

[0002] With the development of shipbuilding technology in my country, the comfort of the ship's cabin environment has received increasing attention. However, for ships that spend long periods at sea, the following issues are paramount: limited hull space, high humidity, and limited energy reserves. In particular, humidity directly affects the lifespan of equipment and the comfort of personnel in the cabin. Currently, dehumidification air conditioning generally employs rotary dehumidification, refrigeration dehumidification, and adsorption dehumidification. For ships operating in humid environments year-round, rotary regeneration air heating alone accounts for up to 30% of annual energy consumption. Therefore, reducing the operating cost of the rotary regeneration air unit and improving the unit's energy efficiency are key to evaluating the unit's energy-saving efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide an energy-saving dehumidifier unit and its control method to solve the problem of high dehumidification energy consumption of rotary dehumidifiers in related technologies.

[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0005] According to a first aspect of the present invention, an energy-saving dehumidifier unit is provided, comprising:

[0006] The fresh air duct, and a first outdoor unit module and a second outdoor unit module attached to the outside of the fresh air duct; wherein, a rotary dehumidifier is installed in the fresh air duct;

[0007] The first outdoor unit module has a heat pipe section on the condenser side. The heat pipe section is used to exchange heat between the exhaust air on the condenser side and the intake air of the rotary dehumidifier regeneration air system. The electric heater is used to heat the exhaust air after heat exchange on the heat pipe section and deliver it to the rotary dehumidifier for dehumidification.

[0008] Preferably, the energy-saving dehumidifier unit further includes:

[0009] Mixing section, and air supply duct installed on the air outlet side of the mixing section;

[0010] The mixing section is located on the air outlet side of the fresh air duct and is connected to the air outlet of the supply air duct through a return air duct, and is used to preheat the fresh air entering the mixing section using the return air output from the return air duct.

[0011] Preferably, the fresh air duct includes: a fresh air section, a filter, a pre-cooling evaporator, a rotary dehumidifier, and a subcooling evaporator arranged sequentially at the fresh air inlet;

[0012] The air supply duct includes: a sterilization and filtration section, a reheat condenser, and a blower, which are sequentially arranged on the air outlet side of the mixing section.

[0013] Preferably, the upper section of the heat pipe section is provided with a first bypass valve, which is used to control whether the exhaust air from the condenser side enters the upper section of the heat pipe section for heat exchange before being discharged.

[0014] The lower section of the heat pipe section is equipped with a second bypass valve. The second bypass valve is used to control whether the indoor return air bypasses the heat exchange in the lower section of the heat pipe section and is discharged directly after passing through the second bypass valve.

[0015] Preferably, the electric heater is disposed on the air outlet side of the lower section of the heat pipe section; and / or,

[0016] A regenerating fan is installed on the air inlet side of the lower section of the heat pipe section. The regenerating fan is used to blow indoor return air as regenerating air into the lower section of the heat pipe section.

[0017] Preferably, the air heated by the electric heater is discharged after passing through the upper section of the rotary dehumidifier, and is used as regenerated air exhaust;

[0018] The fresh air entering the fresh air duct is discharged after passing through the lower section of the rotary dehumidifier;

[0019] The lower section of the rotary dehumidifier is equipped with a third bypass valve, which is used to control whether fresh air enters the lower section of the rotary dehumidifier.

[0020] Preferably, the first outdoor unit module is provided with a first compressor and a first condenser, and a first expansion valve is provided on the pipe connecting the first condenser and the preheating evaporator; a second expansion valve is provided on the pipe connecting the first condenser and the reheating condenser.

[0021] A first fan is installed next to the first condenser to blow air onto the first condenser for heat exchange.

[0022] Preferably, the second outdoor unit module is equipped with a second compressor and a second condenser, and a third expansion valve is provided on the pipe connecting the second condenser and the subcooled evaporator;

[0023] A second fan is installed next to the second condenser to blow air onto the second condenser for heat exchange.

[0024] Preferably, a first temperature and humidity sensor is provided at the fresh air inlet;

[0025] The pre-cooling evaporator is equipped with a second temperature and humidity sensor on the air outlet side;

[0026] A third temperature and humidity sensor is installed on the air outlet side of the rotary dehumidifier;

[0027] A fourth temperature and humidity sensor is installed on the air outlet side of the subcooled evaporator;

[0028] A fifth temperature and humidity sensor is installed on the air inlet side of the sterilization and filtration section;

[0029] A sixth temperature and humidity sensor is installed on the air outlet side of the blower.

[0030] Preferably, the fresh air duct, mixing section, supply air duct, first outdoor unit module, and second outdoor unit module are designed as an integrated indoor and outdoor unit; wherein the air outlet side of the mixing section is directly opposite the supply air duct.

[0031] The upper section of the mixing section is a fresh air inlet, directly opposite the air outlet of the fresh air duct; the lower section of the mixing section is directly opposite the second outdoor unit module, and the first outdoor unit module is located to the left of the second outdoor unit module; the bottom of the mixing section is provided with a return air outlet, which is connected to the air outlet of the supply air duct through a return air duct.

[0032] According to a second aspect of the present invention, a control method for an energy-saving dehumidifier unit is provided, comprising:

[0033] Obtain the ambient temperature T of the energy-saving dehumidifier unit X The ambient humidity d X The outlet air temperature T of the pre-cooled evaporator a The humidity d on the outlet side of the pre-cooled evaporator a The outlet air temperature T of the blower s The humidity d at the outlet of the blower s Temperature fluctuation threshold ΔT, humidity fluctuation threshold Δd;

[0034] If Tx>Ts+△T, Ta≤Ts+△T, and dx>ds+△d, da≤ds+△d, then enter the cooling and dehumidification mode, controlling the first compressor to turn on, the second compressor to turn off, the second expansion valve to turn on, the rotary dehumidifier to turn off, the third bypass valve to turn on, the second bypass valve to turn off, the first bypass valve to turn on, the electric heater to turn off, the blower to turn on, the regenerator to turn off, the first fan to turn on, and the second fan to turn off.

[0035] Preferably, the method further includes:

[0036] Obtain the outlet air temperature T of the subcooled evaporator c Humidity d on the outlet side of the subcooled evaporator c ;

[0037] If Tx>Ts+△T, Tc≤Ts+△T, and dx>ds+△d, dc≤ds+△d<da, then enter the cooling and dehumidification mode, controlling the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn on, the rotary dehumidifier to turn off, the third bypass valve to turn on, the second bypass valve to turn off, the first bypass valve to turn on, the electric heater to turn off, the blower to turn on, the regenerator to turn off, the first fan to turn on, and the second fan to turn on.

[0038] Preferably, the method further includes:

[0039] Obtain the inlet air temperature T of the sterilization filter section e ;

[0040] If Tx > Ts + ΔT, Tc ≤ Ts + ΔT, Te = Ts + ΔT, and dx > ds + Δd, dc ≤ ds + Δd < da, then enter the cooling and dehumidification mode, controlling the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn off, the rotary dehumidifier to turn on, the third bypass valve to turn off, the second bypass valve to turn off, the first bypass valve to turn off, the electric heater to turn on, the blower to turn on, the regenerator to turn on, the first fan to turn on, and the second fan to turn on.

[0041] Preferably, the method further includes:

[0042] If Tx>Ts+△T, Tc≤Ts+△T, Te<Ts+△T, and dx>ds+△d, dc≤ds+△d<da, enter the cooling and dehumidification mode, control the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn on, the rotary dehumidifier to turn on, the third bypass valve to turn off, the second bypass valve to turn off, the first bypass valve to turn off, the electric heater to turn off, the blower to turn on, the regenerator to turn on, the first fan to turn on, and the second fan to turn on;

[0043] or,

[0044] If Tx > Ts + ΔT, Tc ≤ Ts + ΔT, Te < Ts + ΔT, and dx > ds + Δd, dc ≤ ds + Δd < da, then enter the cooling and dehumidification mode, controlling the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn on, the rotary dehumidifier to turn on, the third bypass valve to turn off, the second bypass valve to turn off, the first bypass valve to turn off, the electric heater to turn on, the blower to turn on, the regenerator to turn on, the first fan to turn on, and the second fan to turn on.

[0045] Preferably, the method further includes:

[0046] If Tx = Ts + ΔT and dx ≤ ds + Δd, enter bypass mode, controlling the first compression mechanism, the second compression mechanism, the second expansion valve (closed), the rotary dehumidifier mechanism, the third bypass valve (closed), the second bypass valve (closed), the first bypass valve (opened), the electric heater (closed), the blower (opened), the regeneration air mechanism (closed), the first air mechanism (closed), and the second air mechanism (closed).

[0047] Preferably, the method further includes:

[0048] If Tx < Ts + ΔT, Ta ≤ Ts + ΔT, and dx > ds + Δd, da ≤ ds + Δd, enter heating mode, control the first compressor to turn on, the second compressor to turn off, the second expansion valve to turn on, the dehumidifier to turn off, the third bypass valve to turn on, the second bypass valve to turn off, the first bypass valve to turn on, the electric heater to turn off, the blower to turn on, the regenerator to turn off, the first fan to turn on, and the second fan to turn off.

[0049] Preferably, the method further includes:

[0050] If Tx < Ts + ΔT, Ta ≤ Ts + ΔT, and dx ≤ ds + Δd, enter heating mode, control the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn off, the rotary dehumidifier to turn off, the third bypass valve to turn on, the second bypass valve to turn off, the first bypass valve to turn on, the electric heater to turn off, the blower to turn on, the regenerator to turn off, the first fan to turn on, and the second fan to turn off.

[0051] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0052] By exchanging heat with the exhaust air on the condenser side through the heat pipe section, and heating the exhaust air after heat exchange by setting an electric heater on the air outlet side of the heat pipe section, efficient heat recovery of the exhaust air of the outdoor unit module under summer working conditions is achieved, solving the problem of high dehumidification energy consumption of rotary dehumidifiers in the existing technology.

[0053] Furthermore, the condenser of the first outdoor unit module is used to divert heat to the rotary dehumidifier. Simultaneously, to prevent insufficient condenser heat exchange, return air is introduced into the mixing section to increase the heat exchange capacity of the reheat condenser, ensuring that the supply air temperature requirement is met, reducing the compressor's workload, and improving energy efficiency. After the fresh air and return air are mixed, they enter the reheat condenser; the problem of insufficient reheat heat is avoided by adjusting the airflow. Attached Figure Description

[0054] Figure 1 This is a top view of an energy-saving dehumidifier unit according to an exemplary embodiment;

[0055] Figure 2 This is an airflow diagram illustrating an energy-saving dehumidifier unit according to an exemplary embodiment;

[0056] Figure 3 This is a flowchart illustrating a control method for an energy-saving dehumidifier unit according to an exemplary embodiment;

[0057] 1-First outdoor unit module; 2-Second outdoor unit module; 3-First condenser; 4-First compressor; 5-First four-way valve; 6-First expansion valve; 7-Second expansion valve; 8-Second condenser; 9-Second compressor; 10-Second four-way valve; 11-Third expansion valve; 12-Return air; 13-Fresh air; 14-Return air; 15-Third bypass valve; 16-Supply air; 17-Fresh air section; 18-Filter; 19-Pre-cooling evaporator; 20-Rotary dehumidifier; 21-Subcooling evaporator; 22-Mixed air section; 23-Sterilization filter section; 24-Reheat condenser; 25-Supply fan; 26-Fresh air; 27-First fan; 28-First bypass valve; 29-Exhaust air from first outdoor unit module; 30-Regenerated air exhaust; 31-Regenerated fan; 32-Second bypass valve; 33-Heat pipe section; 34-Electric heater; 35-Return air vent. Detailed Implementation

[0058] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0059] Example 1

[0060] Figure 1 This is a top view of an energy-saving dehumidifier unit according to an exemplary embodiment, such as... Figure 1 As shown, the energy-saving dehumidifier unit includes:

[0061] The fresh air duct, and the first outdoor unit module 1 and the second outdoor unit module 2 attached to the outside of the fresh air duct; wherein, a rotary dehumidifier 20 is installed in the fresh air duct.

[0062] The first outdoor unit module 1 has a heat pipe section 33 on the condenser side. The heat pipe section 33 is used to exchange heat between the exhaust air on the condenser side and the intake air of the regeneration air system of the rotary dehumidifier 20. The electric heater 34 is used to heat the exhaust air after heat exchange in the heat pipe section 33 and deliver it to the rotary dehumidifier 20 for dehumidification.

[0063] Understandably, in existing technologies, the hot air from the condenser side is directly discharged outdoors during year-round dehumidification, resulting in energy waste. However, the technical solution provided in this embodiment exchanges heat with the exhaust air from the condenser side through the heat pipe section 33, and heats the exhaust air after heat exchange by setting an electric heater 34 on the air outlet side of the heat pipe section 33. This achieves efficient heat recovery of the exhaust air from the outdoor unit module during summer operation and solves the problem of high dehumidification energy consumption of the rotary dehumidifier 20 in existing technologies.

[0064] See Figure 1 The energy-saving dehumidifier unit also includes:

[0065] Mixing section 22, and air supply duct installed on the air outlet side of the mixing section 22;

[0066] The mixing section 22 is located on the air outlet side of the fresh air duct and is connected to the air outlet of the supply air duct through a return air duct. It is used to preheat the fresh air entering the mixing section 22 using the return air output from the return air duct.

[0067] See Figure 1 The fresh air duct includes: a fresh air section 17, a filter 18, a pre-cooling evaporator 19, a rotary dehumidifier 20, and a subcooling evaporator 21, which are arranged sequentially at the fresh air inlet;

[0068] The air supply duct includes: a sterilization and filtration section 23, a reheat condenser 24, and a blower 25, which are sequentially arranged on the air outlet side of the mixing section 22.

[0069] It is understood that the technical solution provided in this embodiment uses the condenser of the first outdoor unit module 1 to divert heat to the rotary dehumidifier 20. Simultaneously, to prevent insufficient heat exchange in the condenser, return air is introduced into the mixing section 22 to increase the heat exchange capacity of the reheat condenser 24, ensuring that the supply air temperature requirement is met, reducing the compressor's workload, and improving energy efficiency. After the fresh air and return air are mixed, they enter the reheat condenser, and the problem of insufficient reheat heat is avoided by adjusting the airflow.

[0070] See Figure 2 The upper section of the heat pipe section 33 is provided with a first bypass valve 28, which is used to control whether the exhaust air from the condenser side enters the upper section of the heat pipe section 33 for heat exchange before being discharged.

[0071] The lower section of the heat pipe section 33 is provided with a second bypass valve 32. The second bypass valve 32 is used to control whether the indoor return air does not pass through the lower section of the heat pipe section 33 for heat exchange, and is discharged directly after passing through the second bypass valve.

[0072] See Figure 2 The electric heater 34 is disposed on the air outlet side of the lower section of the heat pipe section 33; and / or,

[0073] A regeneration fan 31 is provided on the air inlet side of the lower section of the heat pipe section 33. The regeneration fan 31 is used to blow indoor return air as regeneration air into the lower section of the heat pipe section 33.

[0074] See Figure 2 The air heated by the electric heater 34 is discharged after passing through the upper section of the rotary dehumidifier 20, and is the exhaust air for regeneration.

[0075] The fresh air entering the fresh air duct is discharged after passing through the lower section of the rotary dehumidifier 20;

[0076] The lower section of the rotary dehumidifier 20 is provided with a third bypass valve 15, which is used to control whether fresh air enters the lower section of the rotary dehumidifier 20.

[0077] See Figure 1 The first outdoor unit module 1 is equipped with a first compressor 4 and a first condenser 3. A first expansion valve 6 is installed on the pipe connecting the first condenser 3 to the preheating evaporator. A second expansion valve 7 is installed on the pipe connecting the first condenser 3 to the reheating condenser 24.

[0078] A first fan 27 is provided next to the first condenser 3 for blowing air to the first condenser 3 for heat exchange.

[0079] See Figure 1 The second outdoor unit module 2 is equipped with a second compressor 9 and a second condenser 8. A third expansion valve 11 is installed on the pipe connecting the second condenser 8 and the subcooled evaporator 21.

[0080] A second fan is provided next to the second condenser 8 for blowing air to the second condenser 8 for heat exchange.

[0081] Preferably, a first temperature and humidity sensor is provided at the fresh air inlet;

[0082] The precooling evaporator 19 is equipped with a second temperature and humidity sensor on the air outlet side;

[0083] A third temperature and humidity sensor is installed on the air outlet side of the rotary dehumidifier 20;

[0084] A fourth temperature and humidity sensor is provided on the air outlet side of the subcooled evaporator 21;

[0085] A fifth temperature and humidity sensor is provided on the air inlet side of the sterilization and filtration section 23;

[0086] A sixth temperature and humidity sensor is installed on the air outlet side of the blower 25.

[0087] Understandably, the bypass opening and closing is adaptively adjusted based on the temperature and humidity information detected by the first, second, third, fourth, fifth, and sixth temperature and humidity sensors. Through temperature and humidity detection, adaptive adjustment with the bypass ventilation valve is achieved, reducing the overall energy consumption of the regenerated air flow and ensuring improved overall energy efficiency of the unit, thus achieving the goals of energy-saving dehumidification and improved energy efficiency.

[0088] See Figure 1The fresh air duct, mixing section 22, air supply duct, first outdoor unit module 1 and second outdoor unit module 2 are designed as an integrated indoor and outdoor unit; wherein, the air outlet side of the mixing section 22 is directly opposite the air supply duct.

[0089] The upper section of the mixing section 22 is a fresh air inlet, directly facing the air outlet of the fresh air duct; the lower section of the mixing section 22 is directly facing the second outdoor unit module 2, and the first outdoor unit module 1 is located on the left side of the second outdoor unit module 2; the bottom of the mixing section 22 is provided with a return air outlet 35, which is connected to the air outlet of the supply air duct through a return air duct.

[0090] Understandably, existing energy-saving dehumidifiers feature a separate indoor and outdoor unit design, which results in a large equipment footprint and significant heat loss during refrigerant circulation. In contrast, the technical solution provided in this embodiment features an integrated indoor and outdoor unit design, which is compact and saves installation space.

[0091] Example 2

[0092] Figure 3 This is a flowchart illustrating a control method for an energy-saving dehumidifier unit according to an exemplary embodiment, such as... Figure 3 As shown, the method includes:

[0093] Step S11: Obtain the ambient temperature T of the energy-saving dehumidifier unit. X The ambient humidity d X The outlet air temperature T of the pre-cooled evaporator 19 a The humidity d on the outlet side of the pre-cooled evaporator 19 a The outlet air temperature T of the blower 25 s The humidity d at the outlet side of the blower 25 s Temperature fluctuation threshold ΔT, humidity fluctuation threshold Δd;

[0094] Step S12: If Tx>Ts+△T, Ta≤Ts+△T, and dx>ds+△d, da≤ds+△d, enter the cooling and dehumidification mode, control the first compressor 4 to be on, the second compressor 9 to be off, the second expansion valve 7 to be on, the rotary dehumidifier 20 to be off, the third bypass valve 15 to be on, the second bypass valve 32 to be off, the first bypass valve 28 to be on, the electric heater 34 to be off, the blower 25 to be on, the regenerator fan 31 to be off, the first fan 27 to be on, and the second fan to be off.

[0095] Furthermore, the method also includes:

[0096] Obtain the outlet air temperature T of the subcooled evaporator 21 c The humidity d on the outlet side of the subcooled evaporator 21 c ;

[0097] If Tx>Ts+△T, Tc≤Ts+△T, and dx>ds+△d, dc≤ds+△d<da, then enter the cooling and dehumidification mode, controlling the first compressor 4 to be on, the second compressor 9 to be on, the second expansion valve 7 to be on, the rotary dehumidifier 20 to be off, the third bypass valve 15 to be on, the second bypass valve 32 to be off, the first bypass valve 28 to be on, the electric heater 34 to be off, the blower 25 to be on, the regenerator 31 to be off, the first fan 27 to be on, and the second fan to be on.

[0098] Furthermore, the method also includes:

[0099] Obtain the inlet air temperature T of the sterilization filter section 23 e ;

[0100] If Tx > Ts + ΔT, Tc ≤ Ts + ΔT, Te = Ts + ΔT, and dx > ds + Δd, dc ≤ ds + Δd < da, then enter the cooling and dehumidification mode, controlling the first compressor 4 to be on, the second compressor 9 to be on, the second expansion valve 7 to be off, the rotary dehumidifier 20 to be on, the third bypass valve 15 to be off, the second bypass valve 32 to be off, the first bypass valve 28 to be off, the electric heater 34 to be on, the blower 25 to be on, the regenerator 31 to be on, the first fan 27 to be on, and the second fan to be on.

[0101] Furthermore, the method also includes:

[0102] If Tx>Ts+△T, Tc≤Ts+△T, Te<Ts+△T, and dx>ds+△d, dc≤ds+△d<da, then enter the cooling and dehumidification mode, controlling the first compressor 4 to be on, the second compressor 9 to be on, the second expansion valve 7 to be on, the rotary dehumidifier 20 to be on, the third bypass valve 15 to be off, the second bypass valve 32 to be off, the first bypass valve 28 to be off, the electric heater 34 to be off, the blower 25 to be on, the regenerator 31 to be on, the first fan 27 to be on, and the second fan to be on.

[0103] or,

[0104] If Tx > Ts + ΔT, Tc ≤ Ts + ΔT, Te < Ts + ΔT, and dx > ds + Δd, dc ≤ ds + Δd < da, then enter the cooling and dehumidification mode, controlling the first compressor 4 to be on, the second compressor 9 to be on, the second expansion valve 7 to be on, the rotary dehumidifier 20 to be on, the third bypass valve 15 to be off, the second bypass valve 32 to be off, the first bypass valve 28 to be off, the electric heater 34 to be on, the blower 25 to be on, the regenerator 31 to be on, the first fan 27 to be on, and the second fan to be on.

[0105] Furthermore, the method also includes:

[0106] If Tx = Ts + ΔT and dx ≤ ds + Δd, enter bypass mode, controlling the first compressor 4 to turn off, the second compressor 9 to turn off, the second expansion valve 7 to turn off, the rotary dehumidifier 20 to turn off, the third bypass valve 15 to turn off, the second bypass valve 32 to turn off, the first bypass valve 28 to turn on, the electric heater 34 to turn off, the blower 25 to turn on, the regenerator fan 31 to turn off, the first fan 27 to turn off, and the second fan to turn off.

[0107] Furthermore, the method also includes:

[0108] If Tx < Ts + ΔT, Ta ≤ Ts + ΔT, and dx > ds + Δd, da ≤ ds + Δd, enter heating mode, control the first compressor 4 to be on, the second compressor 9 to be off, the second expansion valve 7 to be on, the rotary dehumidifier 20 to be off, the third bypass valve 15 to be on, the second bypass valve 32 to be off, the first bypass valve 28 to be on, the electric heater 34 to be off, the blower 25 to be on, the regenerator fan 31 to be off, the first fan 27 to be on, and the second fan to be off.

[0109] Furthermore, the method also includes:

[0110] If Tx < Ts + ΔT, Ta ≤ Ts + ΔT, and dx ≤ ds + Δd, enter heating mode, control the first compressor 4 to be on, the second compressor 9 to be on, the second expansion valve 7 to be off, the rotary dehumidifier 20 to be off, the third bypass valve 15 to be on, the second bypass valve 32 to be off, the first bypass valve 28 to be on, the electric heater 34 to be off, the blower 25 to be on, the regenerator fan 31 to be off, the first fan 27 to be on, and the second fan to be off.

[0111] It should be noted that, for ease of understanding of the control method provided in this embodiment, the control methods under various operating modes are summarized in Table 1 below:

[0112]

[0113]

[0114] Table 1

[0115] It is understood that the technical solution provided in this embodiment adaptively adjusts the bypass opening and closing based on the detected temperature and humidity information. Through temperature and humidity detection, adaptive adjustment of the bypass ventilation valve is achieved, reducing the overall energy consumption of the regenerated air flow and ensuring improved overall energy efficiency of the unit, thereby achieving the goals of energy-saving dehumidification and improved energy efficiency.

[0116] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0117] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0118] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0119] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0120] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0121] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0122] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A control method for an energy-saving dehumidifier unit, characterized in that, The energy-saving dehumidifier includes: a fresh air duct, and a first outdoor unit module and a second outdoor unit module attached to the outside of the fresh air duct; wherein, a rotary dehumidifier is installed in the fresh air duct; a heat pipe section is provided on the condenser side of the first outdoor unit module, the heat pipe section is used to exchange heat between the exhaust air on the condenser side and the intake air of the rotary dehumidifier's regeneration air system, and an electric heater is provided on the outlet side of the heat pipe section, the electric heater is used to heat the outlet air after heat exchange in the heat pipe section and deliver it to the rotary dehumidifier for dehumidification; The fresh air duct includes a pre-cooling evaporator installed at the fresh air inlet, and the supply air duct includes a reheat condenser and a supply fan installed on the air outlet side of the mixing section; the upper section of the heat pipe section is equipped with a first bypass valve, and the lower section of the heat pipe section is equipped with a second bypass valve; the lower section of the rotary dehumidifier is equipped with a third bypass valve; the first outdoor unit module is equipped with a first compressor and a first condenser, and a second expansion valve is installed on the pipe connecting the first condenser and the reheat condenser; a first fan is installed next to the first condenser for blowing air to the first condenser for heat exchange; the second outdoor unit module is equipped with a second compressor and a second condenser, and a second fan is installed next to the second condenser for blowing air to the second condenser for heat exchange; The control method includes: acquiring the ambient temperature T of the energy-saving dehumidifier unit. X The ambient humidity d X The outlet air temperature T of the pre-cooled evaporator a The humidity d on the outlet side of the pre-cooled evaporator a The outlet air temperature T of the blower s The humidity d at the outlet of the blower s Temperature fluctuation threshold ΔT, humidity fluctuation threshold Δd; If Tx>Ts+ΔT, Ta≤Ts+ΔT, and dx>ds+Δd, da≤ds+Δd, enter the cooling and dehumidification mode, control the first compressor to turn on, the second compressor to turn off, the second expansion valve to turn on, the rotary dehumidifier to turn off, the third bypass valve to turn on, the second bypass valve to turn off, the first bypass valve to turn on, the electric heater to turn off, the blower to turn on, the regenerator to turn off, the first fan to turn on, and the second fan to turn off.

2. The control method for the energy-saving dehumidifier unit according to claim 1, characterized in that, The energy-saving dehumidifier unit also includes: Mixing section, and air supply duct installed on the air outlet side of the mixing section; The mixing section is located on the air outlet side of the fresh air duct and is connected to the air outlet of the supply air duct through a return air duct, and is used to preheat the fresh air entering the mixing section using the return air output from the return air duct.

3. The control method for the energy-saving dehumidifier unit according to claim 2, characterized in that, The fresh air duct includes: a fresh air section, a filter, a pre-cooling evaporator, a rotary dehumidifier, and a subcooling evaporator, which are arranged sequentially at the fresh air inlet; The air supply duct includes: a sterilization and filtration section, a reheat condenser, and a blower, which are sequentially arranged on the air outlet side of the mixing section.

4. The control method for the energy-saving dehumidifier unit according to claim 1, characterized in that, The upper section of the heat pipe section is provided with a first bypass valve, which is used to control whether the exhaust air from the condenser side enters the upper section of the heat pipe section for heat exchange before being discharged. The lower section of the heat pipe section is equipped with a second bypass valve. The second bypass valve is used to control whether the indoor return air bypasses the heat exchange in the lower section of the heat pipe section and is discharged directly after passing through the second bypass valve.

5. The control method for the energy-saving dehumidifier unit according to claim 4, characterized in that, The electric heater is disposed on the air outlet side of the lower section of the heat pipe section; and / or, A regenerating fan is installed on the air inlet side of the lower section of the heat pipe section. The regenerating fan is used to blow indoor return air as regenerating air into the lower section of the heat pipe section.

6. The control method for the energy-saving dehumidifier unit according to claim 4, characterized in that, The air heated by the electric heater is discharged after passing through the upper section of the rotary dehumidifier, and is used as regenerated air exhaust. The fresh air entering the fresh air duct is discharged after passing through the lower section of the rotary dehumidifier; The lower section of the rotary dehumidifier is equipped with a third bypass valve, which is used to control whether fresh air enters the lower section of the rotary dehumidifier.

7. The control method for the energy-saving dehumidifier unit according to claim 3, characterized in that, The first outdoor unit module is equipped with a first compressor and a first condenser. A first expansion valve is installed on the pipe connecting the first condenser and the precooling evaporator. A second expansion valve is installed on the pipe connecting the first condenser and the reheat condenser. A first fan is installed next to the first condenser to blow air onto the first condenser for heat exchange.

8. The control method for the energy-saving dehumidifier unit according to claim 3, characterized in that, The second outdoor unit module is equipped with a second compressor and a second condenser. A third expansion valve is installed on the pipe connecting the second condenser and the subcooled evaporator. A second fan is installed next to the second condenser to blow air onto the second condenser for heat exchange.

9. The control method for the energy-saving dehumidifier unit according to claim 3, characterized in that, A first temperature and humidity sensor is installed at the fresh air inlet; The pre-cooling evaporator is equipped with a second temperature and humidity sensor on the air outlet side; A third temperature and humidity sensor is installed on the air outlet side of the rotary dehumidifier; A fourth temperature and humidity sensor is installed on the air outlet side of the subcooled evaporator; A fifth temperature and humidity sensor is installed on the air inlet side of the sterilization and filtration section; A sixth temperature and humidity sensor is installed on the air outlet side of the blower.

10. The control method for the energy-saving dehumidifier unit according to any one of claims 2 to 9, characterized in that, The fresh air duct, mixing section, supply air duct, first outdoor unit module, and second outdoor unit module are designed as an integrated indoor and outdoor unit; wherein, the air outlet side of the mixing section is directly opposite the supply air duct. The upper section of the mixing section is a fresh air inlet, directly opposite the air outlet of the fresh air duct; the lower section of the mixing section is directly opposite the second outdoor unit module, and the first outdoor unit module is located to the left of the second outdoor unit module; the bottom of the mixing section is provided with a return air outlet, which is connected to the air outlet of the supply air duct through a return air duct.

11. The control method for the energy-saving dehumidifier unit according to claim 3, characterized in that, Also includes: Obtain the outlet air temperature T of the subcooled evaporator c Humidity d on the outlet side of the subcooled evaporator c ; If Tx>Ts+△T, Tc≤Ts+△T, and dx>ds+△d, dc≤ds+△d<da, then enter the cooling and dehumidification mode, controlling the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn on, the rotary dehumidifier to turn off, the third bypass valve to turn on, the second bypass valve to turn off, the first bypass valve to turn on, the electric heater to turn off, the blower to turn on, the regenerator to turn off, the first fan to turn on, and the second fan to turn on.

12. The control method for the energy-saving dehumidifier unit according to claim 11, characterized in that, Also includes: Obtain the inlet air temperature T of the sterilization filter section e ; If Tx > Ts + ΔT, Tc ≤ Ts + ΔT, Te = Ts + ΔT, and dx > ds + Δd, dc ≤ ds + Δd < da, then enter the cooling and dehumidification mode, controlling the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn off, the rotary dehumidifier to turn on, the third bypass valve to turn off, the second bypass valve to turn off, the first bypass valve to turn off, the electric heater to turn on, the blower to turn on, the regenerator to turn on, the first fan to turn on, and the second fan to turn on.

13. The control method for the energy-saving dehumidifier unit according to claim 12, characterized in that, Also includes: If Tx>Ts+△T, Tc≤Ts+△T, Te<Ts+△T, and dx>ds+△d, dc≤ds+△d<da, enter the cooling and dehumidification mode, control the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn on, the rotary dehumidifier to turn on, the third bypass valve to turn off, the second bypass valve to turn off, the first bypass valve to turn off, the electric heater to turn off, the blower to turn on, the regenerator to turn on, the first fan to turn on, and the second fan to turn on; or, If Tx > Ts + ΔT, Tc ≤ Ts + ΔT, Te < Ts + ΔT, and dx > ds + Δd, dc ≤ ds + Δd < da, then enter the cooling and dehumidification mode, controlling the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn on, the rotary dehumidifier to turn on, the third bypass valve to turn off, the second bypass valve to turn off, the first bypass valve to turn off, the electric heater to turn on, the blower to turn on, the regenerator to turn on, the first fan to turn on, and the second fan to turn on.

14. The control method for the energy-saving dehumidifier unit according to claim 13, characterized in that, Also includes: If Tx = Ts + ΔT and dx ≤ ds + Δd, enter bypass mode, controlling the first compressor, the second compressor, the second expansion valve (closed), the rotary dehumidifier (closed), the third bypass valve (closed), the second bypass valve (closed), the first bypass valve (opened), the electric heater (closed), the blower (opened), the regenerated air (closed), the first air blower (closed), and the second air blower (closed).

15. The control method for the energy-saving dehumidifier unit according to claim 14, characterized in that, Also includes: If Tx < Ts + ΔT, Ta ≤ Ts + ΔT, and dx > ds + Δd, da ≤ ds + Δd, enter heating mode, control the first compressor to turn on, the second compressor to turn off, the second expansion valve to turn on, the dehumidifier to turn off, the third bypass valve to turn on, the second bypass valve to turn off, the first bypass valve to turn on, the electric heater to turn off, the blower to turn on, the regenerator to turn off, the first fan to turn on, and the second fan to turn off.

16. The control method for the energy-saving dehumidifier unit according to claim 15, characterized in that, Also includes: If Tx < Ts + ΔT, Ta ≤ Ts + ΔT, and dx ≤ ds + Δd, enter heating mode, control the first compressor to turn on, the second compressor to turn on, the second expansion valve to turn off, the rotary dehumidifier to turn off, the third bypass valve to turn on, the second bypass valve to turn off, the first bypass valve to turn on, the electric heater to turn off, the blower to turn on, the regenerator to turn off, the first fan to turn on, and the second fan to turn off.

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