CN118129234A

CN118129234A - Fresh air dehumidifier control method and device, storage medium and fresh air dehumidifier

Info

Publication number: CN118129234A
Application number: CN202211539103.6A
Authority: CN
Inventors: 高卓贤; 徐振坤; 谭秋晖; 杜顺开; 黄招彬; 李金波; 喻广南
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2024-06-04

Abstract

The invention discloses a fresh air dehumidifier control method and device, a storage medium and a fresh air dehumidifier, and belongs to the technical field of fresh air fans. The method comprises the steps of obtaining the current environment temperature and humidity; determining a target compressor frequency variation based on the current environment temperature and humidity and the set temperature and humidity; and adjusting the frequency of the first compressor and/or the second compressor according to the frequency variation of the target compressor, and respectively controlling the temperature and the humidity by adjusting the frequency of the compressors contained in each double system, thereby realizing independent control of the temperature and the humidity.

Description

Fresh air dehumidifier control method and device, storage medium and fresh air dehumidifier

Technical Field

The invention relates to the technical field of fresh air fans, in particular to a fresh air dehumidifier control method and device, a storage medium and a fresh air dehumidifier.

Background

The traditional fresh air dehumidifier operates in a refrigeration mode to realize fresh air refrigeration and dehumidification, and generally controls refrigeration output capacity through temperature regulation, for example, the frequency of a compressor is determined according to the difference between indoor temperature and set temperature. On the other hand, although the air can be dehumidified, the dehumidification capability is not controllable. The existing fresh air dehumidifier is used for cooling and dehumidifying through heat exchange, fresh air cooling and dehumidifying are simultaneously incapable of being independently controlled, so that humidity cannot be controlled during temperature control, and temperature cannot be controlled during humidity control.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.

Disclosure of Invention

The invention mainly aims to provide a fresh air dehumidifier control, and aims to solve the technical problem that the temperature and the humidity cannot be controlled simultaneously in the prior art.

In order to achieve the above purpose, the invention provides a control method of a fresh air dehumidifier, wherein the fresh air dehumidifier comprises a first heat exchange system and a second heat exchange system, the first heat exchange system comprises a first compressor, and the second heat exchange system comprises a second compressor;

The control method of the fresh air dehumidifier comprises the following steps:

Acquiring the temperature and humidity of the current environment;

determining a target compressor frequency variation based on the current environment temperature and humidity and the set temperature and humidity; and

And adjusting the frequency of the first compressor and/or the second compressor according to the frequency variation of the target compressor.

Optionally, the current environmental temperature and humidity includes a current indoor temperature, a current indoor humidity, a current outdoor temperature, and a current outdoor humidity;

the determining the target compressor frequency variation based on the current environment temperature and humidity and the set temperature and humidity comprises the following steps:

calculating a temperature difference between the current indoor temperature and the set temperature and a humidity difference between the current indoor humidity and the set humidity;

Or alternatively, the first and second heat exchangers may be,

Calculating a temperature difference between the current outdoor temperature and the set temperature and a humidity difference between the current outdoor humidity and the set humidity; and

And determining a target compressor frequency variation according to the temperature difference value and the humidity difference value.

Optionally, the determining the target compressor frequency variation according to the temperature difference value and the humidity difference value includes:

determining a first compressor frequency variation according to the temperature difference;

determining a second compressor frequency variation according to the humidity difference; and

And determining a target compressor frequency variation according to the first compressor frequency variation and the second compressor frequency variation.

Optionally, the determining the target compressor frequency variation according to the first compressor frequency variation and the second compressor frequency variation includes:

Taking the maximum value of the first compressor frequency variation and the second compressor frequency variation as a target compressor frequency variation;

Or alternatively, the first and second heat exchangers may be,

The first compressor frequency variation is taken as a target compressor frequency variation of a first compressor, and the second compressor frequency variation is taken as a target compressor frequency variation of a second compressor.

Optionally, before the maximum value of the first compressor frequency variation and the second compressor frequency variation is set as the target compressor frequency variation, the method further includes:

And executing the step of taking the maximum value of the first compressor frequency variation and the second compressor frequency variation as a target compressor frequency variation when the first compressor frequency variation and the second compressor frequency variation are simultaneously positive variations or when a variation difference between the first compressor frequency variation and the second compressor frequency variation is greater than a preset difference threshold.

Optionally, the control method further includes:

And when the first compressor frequency variation and the second compressor frequency variation are positive variation at the same time or the variation difference between the first compressor frequency variation and the second compressor frequency variation is larger than a preset difference threshold, controlling the first heat exchange system and the second heat exchange system to enter a cooling and non-dehumidifying mode at the same time.

Optionally, the control method further includes:

Respectively acquiring the evaporating temperatures of the first heat exchange system and the second heat exchange system and the air dew point temperature in front of the evaporator;

And when the temperature difference between the evaporation temperature and the air dew point temperature in front of the evaporator is smaller than a preset temperature difference, controlling at least one of the first heat exchange system and the second heat exchange system to enter a cooling and non-dehumidifying mode.

Optionally, the fresh air dehumidifier further comprises a fan module, the first heat exchange system further comprises a first throttling mechanism, and the second heat exchange system further comprises a second throttling mechanism;

the control method further includes:

reducing the frequency of the first compressor and/or the second compressor, or while maintaining the frequency of the first compressor and/or the second compressor from rising;

Increasing the opening degree of the first throttling mechanism and/or the second throttling mechanism;

And improving the air supply quantity of the fan module.

Optionally, the adjusting the frequency of the first compressor and/or the second compressor according to the target compressor frequency variation includes:

And simultaneously adjusting the frequencies of the first compressor and the second compressor according to the frequency variation of the target compressor.

Optionally, the target compressor frequency comprises a first target compressor frequency and a second target compressor frequency;

The adjusting the frequency of the first compressor and/or the second compressor according to the target compressor frequency variation includes:

Adjusting the frequency of the first compressor according to the first target compressor frequency; and

And adjusting the frequency of the second compressor according to the frequency of the second target compressor.

In addition, in order to achieve the above purpose, the invention also provides a fresh air dehumidifier control device, wherein the fresh air dehumidifier comprises a first heat exchange system and a second heat exchange system, the first heat exchange system comprises a first compressor, and the second heat exchange system comprises a second compressor;

The fresh air dehumidifier control device comprises:

the acquisition module is used for acquiring the current environment temperature and humidity;

The calculation module is used for determining the frequency variation of the target compressor based on the current environment temperature and humidity and the set temperature and humidity; and

And the control module is used for adjusting the frequency of the first compressor and/or the second compressor according to the target compressor frequency variation.

In addition, in order to achieve the above object, the present invention also provides a fresh air dehumidifier, which includes: the system comprises a memory, a processor and a fresh air dehumidifier control program stored on the memory and running on the processor, wherein the fresh air dehumidifier control program is configured to realize the fresh air dehumidifier control method.

In addition, in order to achieve the above object, the present invention also provides a storage medium, on which a fresh air dehumidifier control program is stored, which when executed by a processor, implements the fresh air dehumidifier control method as described above.

The method comprises the steps of obtaining the current environment temperature and humidity; determining a target compressor frequency variation based on the current environment temperature and humidity and the set temperature and humidity; and adjusting the frequency of the first compressor and/or the second compressor according to the frequency variation of the target compressor, and respectively controlling the temperature and the humidity by adjusting the frequency of the compressors contained in each double system, thereby realizing independent control of the temperature and the humidity.

Drawings

FIG. 1 is a schematic structural diagram of a fresh air dehumidifier in a hardware operating environment according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a first embodiment of a method for controlling a fresh air dehumidifier according to the present invention;

FIG. 3 is a schematic diagram of a fresh air dehumidifier according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a fresh air dehumidifier according to an embodiment of the control method of the fresh air dehumidifier of the present invention;

FIG. 5 is a schematic flow chart of a second embodiment of a method for controlling a fresh air dehumidifier of the present invention;

FIG. 6 is a schematic flow chart of a third embodiment of a method for controlling a fresh air dehumidifier of the present invention;

Fig. 7 is a block diagram of a first embodiment of a control device for a fresh air dehumidifier according to the present invention.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a fresh air dehumidifier in a hardware operation environment according to an embodiment of the present invention.

As shown in fig. 1, the fresh air dehumidifier may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) Memory or a stable Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.

It will be appreciated by those skilled in the art that the configuration shown in FIG. 1 is not limiting and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.

As shown in fig. 1, an operating system, a network communication module, a user interface module, and a fresh air dehumidifier control program may be included in the memory 1005 as one type of storage medium.

In the fresh air dehumidifier shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the fresh air dehumidifier of the present invention may be disposed in the fresh air dehumidifier, and the fresh air dehumidifier invokes the fresh air dehumidifier control program stored in the memory 1005 through the processor 1001, and executes the fresh air dehumidifier control method provided by the embodiment of the present invention.

The embodiment of the invention provides a fresh air dehumidifier control method, and referring to fig. 2, fig. 2 is a flow chart of a first embodiment of the fresh air dehumidifier control method.

In this embodiment, the method for controlling the fresh air dehumidifier includes the following steps:

Step S10: and acquiring the current environment temperature and humidity.

In this embodiment, the execution body of the embodiment may be the fresh air dehumidifier control device, where the fresh air dehumidifier control device has functions of data processing, data communication, program running, and the like, and the fresh air dehumidifier control device may be a controller inside the fresh air dehumidifier. Of course, other devices with similar functions may be used, and the implementation conditions are not limited thereto. For convenience of explanation, this embodiment will be described with reference to a fresh air dehumidifier control apparatus.

It should be noted that, the conventional fresh air dehumidifier is operated in a refrigeration mode to realize fresh air refrigeration and dehumidification, and generally controls the refrigeration output capability through temperature adjustment, for example, the compressor frequency is determined according to the difference between the indoor temperature and the set temperature. On the other hand, although the air can be dehumidified, the dehumidification capability is not controllable. The existing fresh air dehumidifier is used for cooling and dehumidifying through heat exchange, fresh air cooling and dehumidifying are simultaneously incapable of being independently controlled, so that humidity cannot be controlled during temperature control, and temperature cannot be controlled during humidity control.

In order to solve the above-mentioned problem, this embodiment provides a dual system new trend dehumidifier, and first heat transfer system and second heat transfer system all can carry out accuse temperature and accuse wet, through adjusting the frequency of the compressor of two heat transfer systems, when having realized the accuse temperature, also can control wet.

In some embodiments, when the fresh air dehumidifier has a demand for temperature control and humidity control (e.g., a cooling dehumidification demand, a cooling non-dehumidification demand, a warming dehumidification demand, a constant temperature dehumidification, etc.), step S10 is performed.

In an implementation, in this embodiment, a fresh air dehumidifier structure is first proposed, as shown in fig. 3 and fig. 4. Fresh air equipment 100 includes casing and first heat transfer system 10, be equipped with air supply channel 4 in the casing, first heat transfer system 10 includes: the fresh air heat exchanger structure is positioned in the air supply channel 4 and is provided with a refrigerant pipeline; the first switching device is communicated with the fresh air heat exchanger structure and is used for switching the flow direction of the refrigerant in the fresh air heat exchanger structure; in different operation modes of the first heat exchange system 10, the refrigerant of the first heat exchange system 10 passes through the refrigerant pipeline located at the downstream of the air supply channel 4 and then passes through the refrigerant pipeline located at the upstream of the air supply channel 4. The air supply channel 4 is a channel through which the fresh air device 100 sends outdoor fresh air into the room, and the air exhaust channel 5 is a channel through which the fresh air device 100 discharges indoor air to the outside. The fresh air heat exchanger structure is arranged in the first refrigerant flow path, and the first heat exchange system 10 further comprises: the first compressor 11, the first heat exchange module 12 and the reversing device 3, wherein the first compressor 11 is arranged in the first refrigerant flow path and is provided with a first exhaust port and a first return port; the first heat exchange module 12 is disposed in the first refrigerant flow path and is in communication with the first switching device, the first heat exchange module 12 includes a first outdoor heat exchanger 35 and a heat recovery heat exchanger 36 which are disposed in series, the heat recovery heat exchanger 36 is disposed in the exhaust passage 5, the first outdoor heat exchanger 35 is disposed outside the housing (main housing), the first compressor 11 is mounted in the exhaust passage 5 or outside the housing (main housing), the heat recovery heat exchanger 36 is disposed in the exhaust passage 5, after heat exchange between the air in the exhaust passage 5 and the heat recovery heat exchanger 36 occurs, then the air is discharged from the air discharge channel 5, so that the heat of the air discharged from the air discharge channel 5 can be recovered; the reversing device 3 is connected to the first exhaust port, the first return port, the first heat exchange module 12 and the first switching device, and the reversing device 3 is used for switching the flow direction of the refrigerant, so that the refrigerant passes through the first heat exchange module 12 and then the first switching device, or so that the refrigerant passes through the first switching device and then passes through the first heat exchange module 12. In order to realize the reheat dehumidification function of the fresh air device 100, the fresh air heat exchanger structure comprises a first fresh air heat exchanger 13 and a second fresh air heat exchanger 14 which are sequentially connected in series; the first fresh air heat exchanger 13 is located at the downstream of the air supply channel 4 relative to the second fresh air heat exchanger 14, the outflow port 34 is connected to the first fresh air heat exchanger 13, and the inflow port 33 is connected to the second fresh air heat exchanger 14. In order to reduce control elements in the fresh air equipment 100 and promote stability of the fresh air equipment 100, the first switching device has a first communication port 31, a second communication port 32, an inflow port 33 and an outflow port 34, the fresh air heat exchanger structure communicates the outflow port 34 and the inflow port 33, the first switching device comprises: a first check valve 18, a second check valve 19, a third check valve 1, and a fourth check valve 2, the first check valve 18 being connected between the first communication port 31 and the inflow port 33, the first check valve 18 being in communication in a direction from the inflow port 33 to the first communication port 31; the second check valve 19 is connected between the first communication port 31 and the outflow port 34, and the second check valve 19 is communicated in the direction from the first communication port 31 to the outflow port 34; the third check valve 1 is connected between the inflow port 33 and the second communication port 32, and the third check valve 1 is communicated in the direction from the inflow port 33 to the second communication port 32; the fourth one-way valve 2 is connected between the outflow port 34 and the second communication port 32, and the fourth one-way valve 2 is conducted in the direction from the second communication port 32 to the outflow port 34, so that the first switching device is composed of one-way valves, and compared with the four-way valve or two three-way valve, no control element is needed, and the stability of the fresh air device 100 is higher.

The fresh air heat exchanger structure comprises a first fresh air heat exchanger 13 and a second fresh air heat exchanger 14 which are sequentially connected in series; the first fresh air heat exchanger 13 is located at the downstream of the air supply channel 4 relative to the second fresh air heat exchanger 14, the outflow port 34 is connected to the first fresh air heat exchanger 13, and the inflow port 33 is connected to the second fresh air heat exchanger 14.

The first heat exchange system 10 further includes a first throttling element 15 disposed on the first refrigerant flow path, the first throttling element 15 being located between the first heat exchange module 12 and the first switching device. The first heat exchange system 10 further includes a second throttling element 16, where the second throttling element 16 is disposed on a serial flow path between the first fresh air heat exchanger 13 and the second fresh air heat exchanger 14, so as to throttle the refrigerant flowing out of the first fresh air heat exchanger 13.

Further, the fresh air device 100 further includes a second heat exchange system 20, a second refrigerant flow path is formed on the second heat exchange system 20, the second heat exchange system 20 includes a second outdoor heat exchanger 21, a second compressor 27, a third fresh air heat exchanger 22 and a fourth fresh air heat exchanger 23 which are disposed in the second refrigerant flow path, the third fresh air heat exchanger 22 and the fourth fresh air heat exchanger 23 are disposed in the air supply channel 4, and at this time, the second outdoor heat exchanger 21 and the second compression/27 may also be disposed in the air exhaust channel 5, so that the fresh air device 100 does not need an outdoor unit at all, and saves positions.

The second heat exchange system 20 further includes a second switching device, configured to switch the second outdoor heat exchanger 21 to be connected to the third fresh air heat exchanger 22 or to be simultaneously connected to the third fresh air heat exchanger 22 and the fourth fresh air heat exchanger 23. The second switching device comprises a fourth throttling element 24 and a fifth one-way valve 25 (the fifth one-way valve 25 can be replaced by an electromagnetic valve), and the fourth throttling element 24 is arranged on the second refrigerant flow path and is positioned between the third fresh air heat exchanger 22 and the fourth fresh air heat exchanger 23; the fifth check valve 25 is connected in parallel with the third fresh air heat exchanger 22 and the fourth throttling element 24, and the conducting direction of the fifth check valve 25 is from the fourth fresh air heat exchanger 23 to the second outdoor heat exchanger 21.

So set up, two sets of heat transfer systems exist two evaporators in fresh air channel, have two evaporating temperature, and the upper reaches is higher than low reaches evaporating temperature, and two-stage evaporation refrigeration has promoted the energy consumption greatly in one-level evaporation refrigeration's scheme compared. And the upstream heat exchange system can preheat or precool air first and then exchange heat through the downstream heat exchange system, so that the air outlet temperature can be effectively reduced in a refrigeration mode and the air outlet temperature can be increased in a heating mode. Of course, the heat exchange system at the upstream may cool the air, and the heat exchange system at the downstream may heat the air, thereby realizing the reheat dehumidification function.

Because the first heat exchange system 10 and the second heat exchange system 20 coexist, two outdoor units are often required to be arranged on the first heat exchange system 10 and the second heat exchange system 20, so that the two outdoor units are installed to occupy two outdoor units, occupy too many positions, and are installed, the workload of installation is also large, therefore, the shell comprises a main machine shell and an outdoor unit shell, the main machine shell is internally provided with the air supply channel 4 and the air exhaust channel 5, the first heat exchange system 10 also comprises a first compressor 11 and a first heat exchange module 12, the first heat exchange module 12 comprises a first outdoor heat exchanger 35 and a heat recovery heat exchanger which are arranged in series, the heat recovery heat exchanger is arranged in the air exhaust channel 5, the fourth heat exchanger 23 is arranged in the air supply channel 4, the first compressor 11, the first outdoor heat exchanger 35, the second compressor 27, the second outdoor heat exchanger 21 and the outdoor fan 37 are all arranged in the outdoor housing, so that the heat recovery heat exchanger 36 is arranged in the exhaust passage 5, the fourth fresh air heat exchanger 23 is arranged in the air supply passage 4, the first compressor 11, the first outdoor heat exchanger 35, the second compressor 27, the second outdoor heat exchanger 21 and the outdoor fan 37 are all arranged in the outdoor housing, part of the parts of the outdoor unit is arranged in the exhaust passage 5, the rest of the parts are arranged in the housing of the outdoor unit, and the requirements of the first heat exchange system 10 and the second heat exchange system 20 can be met only by arranging one outdoor unit, so that the occupied positions of the outdoor unit are reduced, and the workload of the outdoor unit installation is reduced.

Further, in this embodiment, the fresh air dehumidifier has nine operation modes, and fig. 3 is taken as an example to illustrate the flow direction of the refrigerant in the fresh air dehumidifier for the nine operation modes.

For the cooling and dehumidifying, cooling and non-humidity control mode and the cooling and humidifying mode, in the first heat exchange system 10, a high-temperature and high-pressure refrigerant is discharged from the first compressor 11, flows through the reversing device 3 and the first heat exchange module 12 in sequence, reduces the throttle opening of the first throttling element 15, converts the high-temperature and high-pressure refrigerant into a low-temperature and low-pressure refrigerant through the first throttling element 15, flows through the second check valve 19, the first fresh air heat exchanger 13, the second throttling element 16, the second fresh air heat exchanger 14 and the third check valve 1 in sequence, finally returns to the first compressor 11, the second throttling element 16 does not throttle, and the first fresh air heat exchanger 13 and the second fresh air heat exchanger 14 at the moment are evaporators to realize refrigeration. Meanwhile, in the second heat exchange system 20, the high-temperature and high-pressure refrigerant is discharged from the second compressor 27, flows through the reversing device 3 and the second outdoor heat exchanger 21 in sequence, reduces the throttle opening of the fifth throttling element 26, converts the high-temperature and high-pressure refrigerant into a low-temperature and low-pressure refrigerant through the fifth throttling element 26, and flows through the second check valve 19, the fourth throttling element 24 and the fourth fresh air heat exchanger 23 in sequence, and finally returns to the second compressor 27, the fourth throttling element 24 does not throttle, and the second check valve 19 and the fourth fresh air heat exchanger 23 at this time are evaporators to realize refrigeration.

For the constant temperature dehumidification mode, in the first heat exchange system 10, a high-temperature and high-pressure refrigerant is discharged from the first compressor 11, flows through the reversing device 3, the first heat exchange module 12, the first throttling element 15, the second one-way valve 19 and the first fresh air heat exchanger 13 in sequence, reduces the throttle opening of the second throttling element 16, converts the high-temperature and high-pressure refrigerant into a low-temperature and low-pressure refrigerant through the second throttling element 16, and flows through the second fresh air heat exchanger 14, the third one-way valve 1 and the reversing device 3 in sequence, and finally returns to the first compressor 11. In the second heat exchange system 20, the high-temperature and high-pressure refrigerant is discharged from the second compressor 27, flows through the reversing device 3, the second outdoor heat exchanger 21, the fifth throttling elements 26 and 22 in sequence, reduces the throttle opening of the fourth throttling element 24, converts the high-temperature and high-pressure refrigerant into a low-temperature and low-pressure refrigerant through the fourth throttling element 24, flows through the fourth fresh air heat exchanger 23 and the reversing device 3 in sequence, and finally returns to the second compressor 27.

For the constant temperature non-humidity control mode, neither the first heat exchange system 10 nor the second heat exchange system 20 is operated.

For the constant temperature humidification mode, in the first heat exchange system 10, the high temperature and high pressure refrigerant is discharged from the first compressor 11, flows through the reversing device 3, the fourth one-way valve 2, the first fresh air heat exchanger 13, the second throttling element 16, the second fresh air heat exchanger 14 and the first one-way valve 18 in sequence, reduces the throttling opening of the first throttling element 15, converts the high temperature and high pressure into the low temperature and low pressure refrigerant through the first throttling element 15, and flows through the first heat exchange module 12 and the reversing device 3 in sequence, and finally returns to the first compressor 11. In the second heat exchange system 20, the high-temperature and high-pressure refrigerant is discharged from the second compressor 27, flows through the reversing device 3, the fourth fresh air heat exchanger 23, the fifth check valve 25 and the fifth throttling element 26 in sequence, and is converted into a low-temperature and low-pressure refrigerant by the second outdoor heat exchanger 21, and finally returns to the second compressor 27.

For the heating and dehumidifying mode, in the first heat exchange system 10, the high-temperature and high-pressure refrigerant is discharged from the first compressor 11, flows through the reversing device 3, the fourth one-way valve 2, the first fresh air heat exchanger 13, the second throttling element 16, the second fresh air heat exchanger 14 and the first one-way valve 18 in sequence, reduces the throttling opening of the first throttling element 15, converts the high-temperature and high-pressure refrigerant into the low-temperature and low-pressure refrigerant through the first throttling element 15, and flows through the first heat exchange module 12 and the reversing device 3 in sequence, and finally returns to the first compressor 11. In the second heat exchange system 20, the high-temperature and high-pressure refrigerant is discharged from the second compressor 27, flows through the reversing device 3, the second outdoor heat exchanger 21, the fifth throttling elements 26 and 22 in sequence, reduces the throttle opening of the fourth throttling element 24, converts the high-temperature and high-pressure refrigerant into a low-temperature and low-pressure refrigerant through the fourth throttling element 24, flows through the fourth fresh air heat exchanger 23 and the reversing device 3 in sequence, and finally returns to the second compressor 27.

In the first heat exchange system 10, for the temperature-rising non-humidity control mode and the temperature-rising humidifying mode, the high-temperature and high-pressure refrigerant is discharged from the first compressor 11, flows through the reversing device 3, the fourth one-way valve 2, the first fresh air heat exchanger 13, the second throttling element 16, the second fresh air heat exchanger 14 and the first one-way valve 18 in sequence, reduces the throttling opening of the first throttling element 15, converts the high-temperature and high-pressure refrigerant into the low-temperature and low-pressure refrigerant through the first throttling element 15, flows through the first heat exchange module 12 and the reversing device 3 in sequence, and finally returns to the first compressor 11. In the second heat exchange system 20, the high-temperature and high-pressure refrigerant is discharged from the second compressor 27, flows through the reversing device 3, the fourth fresh air heat exchanger 23, the fifth check valve 25 and the fifth throttling element 26 in sequence, and is converted into a low-temperature and low-pressure refrigerant by the second outdoor heat exchanger 21, and finally returns to the second compressor 27.

It should be noted that, in this embodiment, the adjustment of the frequency of the compressor needs to be based on the temperature and humidity of the current environment, and the temperature and humidity of the current environment can be obtained through the sensor disposed on the fresh air dehumidifier.

Step S20: and determining the frequency variation of the target compressor based on the current environment temperature and humidity and the set temperature and humidity.

It should be noted that, the compressor frequency directly determines the refrigerating and heating capacity of the fresh air dehumidifier, and after the obtained current environment temperature and humidity, the target compressor frequency variation is calculated by combining the temperature and humidity set by the user, and the target compressor frequency variation is the adjustment amplitude of the compressor frequency.

Step S30: and adjusting the frequency of the first compressor and/or the second compressor according to the frequency variation of the target compressor.

In a specific implementation, after the target compressor frequency variation is determined, the frequencies of the first compressor and the second compressor are increased or decreased based on the target compressor frequency variation, so that independent control of temperature control and humidity control can be realized.

The embodiment obtains the current environment temperature and humidity; determining a target compressor frequency variation based on the current environment temperature and humidity and the set temperature and humidity; and adjusting the frequency of the first compressor and/or the second compressor according to the frequency variation of the target compressor, and respectively controlling the temperature and the humidity by adjusting the frequency of the compressors contained in each double system, thereby realizing independent control of the temperature and the humidity.

Referring to fig. 5, fig. 5 is a schematic flow chart of a second embodiment of a method for controlling a fresh air dehumidifier according to the present invention.

Based on the above first embodiment, in the method for controlling a fresh air dehumidifier of the present embodiment, the step S20 specifically includes:

Step S201: and calculating a temperature difference between the current indoor temperature and the set temperature and a humidity difference between the current indoor humidity and the set humidity.

In this embodiment, the current environmental temperature and humidity in this embodiment includes a current indoor temperature, a current indoor humidity, a current outdoor temperature, and a current outdoor humidity. The target compressor frequency can be determined based on the temperature difference and the humidity difference, in this embodiment, the temperature difference can be calculated according to the current indoor temperature and the set temperature, the humidity difference can be calculated according to the current indoor humidity and the set temperature, the temperature difference can also be calculated according to the current outdoor temperature and the set temperature, and the humidity difference can be calculated according to the current outdoor humidity and the set humidity, but it is emphasized that the indoor temperature and the outdoor temperature need to be used as the standard at the same time during calculation.

In some embodiments, when the fresh air dehumidifier is in the internal circulation mode, a fresh air valve provided at a fresh air inlet of the fresh air channel is closed, an exhaust air valve provided at an exhaust outlet of the exhaust air channel is closed, and a mixing air valve is opened to allow the fresh air channel and the exhaust air channel to communicate, and a temperature difference between the current indoor temperature and the set temperature, and a humidity difference between the current indoor humidity and the set humidity are calculated.

In some embodiments, when the fresh air dehumidifier is in the internal circulation mode, a fresh air damper provided at a fresh air inlet of the fresh air channel is opened, an exhaust damper provided at an exhaust outlet of the exhaust channel is opened, a mixing damper is closed, and a temperature difference between the current outdoor temperature and the set temperature, and a humidity difference between the current outdoor humidity and the set humidity are calculated.

Step S202: and determining a target compressor frequency variation according to the temperature difference value and the humidity difference value.

In a specific implementation, after the temperature difference and the humidity difference are calculated, the target compressor frequency variation may be determined based on the calculated temperature difference and humidity difference in the present embodiment.

Specifically, in this embodiment, the first compressor frequency variation may be determined according to the temperature difference, the second compressor frequency variation may be determined according to the humidity difference, the compressor frequency variation corresponding to the temperature difference may be searched by a table lookup method, the energy requirement may be determined by the temperature difference and the humidity difference, and then the compressor frequency variation may be determined according to the energy requirement by table lookup. Further, in this embodiment, the target compressor frequency variation is obtained according to the first compressor frequency variation and the second compressor frequency variation, and in this embodiment, there are two ways. In the first aspect, the target compressor frequency of the first compressor and the target compressor frequency of the second compressor are the same, in which case the first compressor frequency variation is compared with the second compressor frequency variation, and then the maximum value of the first compressor frequency variation and the second compressor frequency variation is set as the target compressor frequency variation. In the second mode, the target compressor frequencies of the first compressor and the second compressor are different, that is, the first compressor frequency variation is the target frequency variation corresponding to the first compressor, and the second compressor frequency variation is the target frequency variation corresponding to the second compressor.

It should be noted that, before the maximum value of the first compressor frequency variation and the second compressor frequency variation is taken as the target compressor frequency variation, in this embodiment, it is first determined whether the first compressor frequency variation and the second compressor frequency variation are both positive variation or if the variation difference between the first compressor frequency variation and the second compressor frequency variation is greater than the preset difference threshold, if the first compressor variation is positive, the second compressor variation is negative, or if the variation difference is greater than the preset difference threshold (i.e. the first compressor frequency variation is greater and the second compressor frequency variation is smaller), it is indicated that cooling and not dehumidification are required at this time, and in this case, the first heat exchange system and the second heat exchange system are controlled to enter into the cooling and not dehumidification mode at the same time.

In an alternative embodiment, after the first heat exchange system and the second heat exchange system enter the cooling and non-dehumidifying mode at the same time, the frequencies of the first compressor and the second compressor can be reduced at the same time, the frequencies of the first compressor and the second compressor can be maintained at the same time and not to rise, the opening degrees of the first throttling mechanism and the second throttling mechanism can be increased at the same time, the air supply amount of the fan module can be increased, and one or more operations can be performed at the same time. By the means, the tube temperature of the evaporator is raised, condensation dehumidification is reduced, and over-dehumidification is prevented.

In an optional embodiment, the evaporating temperatures of the first heat exchange system and the second heat exchange system and the air dew point temperature before the evaporator may be obtained respectively, and when a temperature difference between the evaporating temperature and the air dew point temperature before the evaporator is smaller than a preset temperature difference, at least one of the first heat exchange system and the second heat exchange system is controlled to enter a cooling and non-dehumidifying mode. The judgment is used for respectively judging whether the two heat exchange systems enter a cooling non-dehumidification mode or not, and after any one heat exchange system meets the conditions, the two heat exchange systems enter the cooling non-dehumidification mode instead of entering the two heat exchange systems at the same time. And if the first heat exchange system enters a cooling and non-dehumidifying mode, the frequency of the first compressor is increased or maintained, the opening degree of the first throttling mechanism is increased, and the air supply quantity of the fan module is increased. The control of the second heat exchange system entering the cooling non-dehumidification mode is similar to that of the first heat exchange system, and will not be described here again.

According to the embodiment, the temperature difference between the current indoor temperature and the set temperature and the humidity difference between the current indoor humidity and the set humidity are calculated, the target compressor frequency variation is determined according to the temperature difference and the humidity difference, the operation of the compressor is controlled through the target compressor frequency variation determined by the temperature and humidity difference, and after the heat exchange system enters the cooling and dehumidifying mode, the temperature and humidity can be effectively controlled by adjusting the compressor frequency, the opening of the throttling structure and the air supply amount of the fan module.

Referring to fig. 6, fig. 6 is a schematic flow chart of a third embodiment of a method for controlling a fresh air dehumidifier according to the present invention.

Based on the above first embodiment, a third embodiment of the control method of the fresh air dehumidifier of the present invention is provided, in this embodiment, the step S30 includes:

Step S301: and simultaneously adjusting the frequencies of the first compressor and the second compressor according to the frequency variation of the target compressor.

In a specific implementation, when the frequency variation of the first compressor is the same as that of the second compressor, the frequency of the first compressor and the frequency of the second compressor are adjusted according to the same target frequency variation of the first compressor. For example, if the target compressor frequency change amount is Δf, the first compressor frequency is F1, and the second compressor frequency is F2, the first compressor frequency is adjusted to f1+Δf, and the second compressor frequency is adjusted to f2+Δf.

Further, as described in the above embodiment, when the compressor frequency variation amounts of the first compressor and the second compressor are different, that is, the target compressor frequency includes the first target compressor frequency and the second target compressor frequency, the frequency of the first compressor is adjusted according to the first target compressor frequency, and the frequency of the second compressor is adjusted according to the second target compressor frequency. For example, if the first target compressor frequency change amount is Δf1, the second target compressor frequency change amount is Δf2, the first compressor frequency is F1, and the second compressor frequency is F2, the first compressor frequency is adjusted to f1+Δf1, and the second compressor frequency is adjusted to f2+Δf2.

According to the embodiment, the frequencies of the first compressor and the second compressor are adjusted according to the frequency variation of the target compressor, or the frequency of the first compressor is adjusted according to the frequency of the first target compressor and the frequency of the second compressor is adjusted according to the frequency of the second target compressor, so that temperature control and humidity control can be effectively performed.

In addition, the embodiment of the invention also provides a storage medium, wherein a fresh air dehumidifier control program is stored on the storage medium, and the fresh air dehumidifier control program realizes the steps of the fresh air dehumidifier control method when being executed by a processor.

Because the storage medium adopts all the technical schemes of all the embodiments, the storage medium has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here.

Referring to fig. 7, fig. 7 is a block diagram illustrating a first embodiment of a control device for a fresh air dehumidifier according to the present invention.

As shown in fig. 7, a fresh air dehumidifier control apparatus according to an embodiment of the present invention includes:

the acquisition module 10 is configured to acquire a current environmental temperature and humidity.

The calculating module 20 is configured to determine a target compressor frequency variation based on the current environmental temperature and humidity and the set temperature and humidity.

A control module 30 for adjusting the frequency of the first compressor and/or the second compressor according to the target compressor frequency variation.

It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the invention as desired, and the invention is not limited thereto.

It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.

In addition, technical details not described in detail in the embodiment may refer to the method for controlling the fresh air dehumidifier provided in any embodiment of the present invention, which is not described herein.

Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. The control method of the fresh air dehumidifier is characterized in that the fresh air dehumidifier comprises a first heat exchange system and a second heat exchange system, wherein the first heat exchange system comprises a first compressor, and the second heat exchange system comprises a second compressor;

The fresh air dehumidifier control method comprises the following steps:

Acquiring the temperature and humidity of the current environment;

2. The method of claim 1, wherein the current ambient temperature and humidity comprises a current indoor temperature, a current indoor humidity, a current outdoor temperature, and a current outdoor humidity;

Or alternatively, the first and second heat exchangers may be,

3. The method of controlling a fresh air dehumidifier of claim 2, wherein said determining a target compressor frequency variation from said temperature difference and said humidity difference comprises:

4. The fresh air dehumidifier control method of claim 3, wherein said determining a target compressor frequency variation from said first compressor frequency variation and said second compressor frequency variation comprises:

Or alternatively, the first and second heat exchangers may be,

5. The fresh air dehumidifier control method of claim 4, wherein said taking the maximum of said first compressor frequency variation and said second compressor frequency variation as a target compressor frequency variation is preceded by:

6. The fresh air dehumidifier control method of claim 5, further comprising:

7. The fresh air dehumidifier control method of claim 5, further comprising:

8. The method of claim 6 or 7, wherein the fresh air dehumidifier further comprises a fan module, the first heat exchange system further comprises a first throttling mechanism, and the second heat exchange system further comprises a second throttling mechanism;

the control method further includes:

And improving the air supply quantity of the fan module.

9. The method of controlling a fresh air dehumidifier of claim 1, wherein said adjusting the frequency of the first compressor and/or the second compressor according to the target compressor frequency variation comprises:

10. The fresh air dehumidifier control method of claim 1, wherein the target compressor frequency comprises a first target compressor frequency and a second target compressor frequency;

11. The fresh air dehumidifier control device is characterized by comprising a first heat exchange system and a second heat exchange system, wherein the first heat exchange system comprises a first compressor, and the second heat exchange system comprises a second compressor;

The fresh air dehumidifier control device comprises:

12. A fresh air dehumidifier, characterized in that the fresh air dehumidifier comprises: a memory, a processor, and a fresh air dehumidifier control program stored on the memory and running on the processor, the fresh air dehumidifier control program configured to implement the fresh air dehumidifier control method of any one of claims 1 to 10.

13. A storage medium, wherein a fresh air dehumidifier control program is stored on the storage medium, and when executed by a processor, the fresh air dehumidifier control program implements the fresh air dehumidifier control method according to any one of claims 1 to 10.