WO2016023489A1

WO2016023489A1 - Control method and system for smog-removing fresh-air air conditioning system

Info

Publication number: WO2016023489A1
Application number: PCT/CN2015/086722
Authority: WO
Inventors: 戴若夫; 辜显旺
Original assignee: 戴若夫
Priority date: 2014-08-13
Filing date: 2015-08-12
Publication date: 2016-02-18
Also published as: CN105444331A; CN105444331B

Abstract

A control method and system for a smog-removing fresh-air air conditioning system. The method comprises: S1: powering up and initializing a main unit; S2: detecting outdoor temperature, t; S3: comparing the outdoor temperature, t, with a preset swapping temperature, t1, swapping a fresh air heat exchanger (3) and a dust filter (4) between front/rear positions, keep repeating step S2 and step S3 while proceeding to step S4; S4: starting an air conditioner; S5: transmitting power to an air supply fan (8) and an air exhaust fan (9). An alternate method is such that step S5 in the previous method is brought forward as step S2 while the other steps are pushed back. The system comprises a main unit controller (1), an outdoor temperature sensor (2), and the fresh air heat exchanger (3). A fresh air duct (6) is equipped with a swapping pipeline capable of swapping the order in which fresh air flows through the fresh air heat exchanger (3) and the dust filter (4). The outdoor temperature sensor (2) is arranged outdoors. The dust filter (4), the air supply fan (8), the air exhaust fan (9) are all electrically connected to the main unit controller (1) while the main unit controller (1) controls the swapping of the order in which fresh air flows through the fresh air heat exchanger (3) and the dust filter (4).

Description

Control method and system for removing fresh air conditioning system

[Technical Field]

The invention mainly relates to the field of fresh air removal and the invention, and particularly relates to a control method and system for removing the fresh air air conditioning system.

【Background technique】

At present, popular air purifiers can filter and remove some indoor PM2.5 micro-particles and some toxic and harmful polluting gases, but can not introduce outdoor fresh air, and need to periodically replace the filter materials to increase operating costs and operation and maintenance for users. trouble. Although the fresh air system is equipped with various filters and even fully automatic cleaning filters, it solves the drawbacks of the air purifiers without new air. But it is still difficult to spread to ordinary families. In the room where the air conditioner has been installed, a fully automatic fresh air system machine is installed, which not only has insufficient space in the general room, but is also very cumbersome to install and inconvenient to operate.

[Summary of the Invention]

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a control method and system for a fresh air conditioning system for removing winds, which is simple and compact in structure, convenient in operation, and capable of realizing various functions.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A control method for a fresh air conditioning system including a host controller, an outdoor temperature sensor, a fresh air heat exchanger, a dust filter, an air conditioner, a fresh air duct, an exhaust duct, a blower, and an exhaust fan, the fresh air The pipeline is equipped with a switching pipeline that can switch the fresh air through the fresh air heat exchanger and the dust filter.

The method includes the following steps:

S1: The host is powered on and initialized;

S2: detecting the outdoor temperature t;

S3: Comparing the outdoor temperature t with the preset temperature t1, when t≤t1, switching the fresh air heat exchanger in front and the dust filter in the rear, when t>t1, switching the fresh air heat exchanger in the rear and dusting The filter is in front, keep step S2 and step S3 cycle, and proceeds to step S4;

S4: start the air conditioner;

S5: The blower and the exhaust fan are powered.

The method includes the following steps:

S1: The host is powered on and initialized;

S2: the air blower and the exhaust fan are powered;

S3: detecting the outdoor temperature t;

S4: Comparing the outdoor temperature t and the switching preset temperature t1: when t≤t1, switching the fresh air heat exchanger in front and the dust removing filter in the rear, when t>t1, switching the fresh air heat exchanger in the rear and dusting The filter is in front, keep step S3 and step S4 cycle, and proceeds to step S5;

S5: Start the air conditioner.

As a further improvement of the method of the invention:

Before comparing the outdoor temperature t and switching the preset temperature t1, the preset preset temperature t1 is preset, wherein -20 ° C ≤ t1 ≤ -5 ° C.

When the sequence of the fresh air heat exchanger and the dust removing filter are switched, the sequence of the fresh air flowing through the fresh air heat exchanger and the dust removing filter is changed by controlling the three-way electromagnetic switching valve provided on the switching pipeline and the fresh air duct.

The dust removing filter is an electrostatic dust removing filter, and supplies power to the electrostatic dust removing filter while powering the feeding fan and the exhaust fan.

An air conditioning system for implementing the above control method, comprising a host controller, an external temperature sensor, a fresh air heat exchanger, a dust filter, an air conditioner, a fresh air duct, an exhaust duct, a blower and an exhaust fan, wherein the fresh air duct is provided There is a switching pipeline which can switch the fresh air through the fresh air heat exchanger and the dust filter, and the fresh air duct and the exhaust duct are arranged in the air conditioner, and the fresh air duct is connected to the outdoor through the fresh air heat exchanger and the dust filter. The exhaust duct is connected to the outdoor via a fresh air heat exchanger, and the blower is disposed at a blower opening of the fresh air duct, the exhaust fan is disposed at an air outlet of the exhaust duct, and the external temperature sensor is disposed outdoors. The dust filter, the blower and the exhaust fan are electrically connected to the host controller, and the host controller controls the sequence of switching the fresh air through the fresh air heat exchanger and the dust filter.

As a further improvement of the air conditioning system of the present invention:

The fresh air duct includes a first air inlet duct, a middle air inlet duct and a last air inlet duct, wherein the first section air inlet duct is connected to the outdoor, the blower is located on the end section air inlet duct and is adjacent to the air supply duct, and the middle section air inlet duct includes The first middle branch pipe of the dust filter and the fresh air heat exchanger is sequentially connected, and the second middle branch pipe which sequentially connects the fresh air heat exchanger and the dust filter.

The first stage air inlet pipe is connected to the last stage air inlet pipe through the first middle branch pipe through the dust filter and the fresh air heat exchanger.

The second middle branch pipe includes a first inlet three-way electromagnetic switching valve, a third inlet three-way electromagnetic switching valve and a fourth inlet three-way electromagnetic switching valve, and a switchable outlet disposed on the first middle branch pipe Switching the second inlet three-way electromagnetic switching valve and the fifth inlet three-way electromagnetic switching valve, the first inlet three-way electromagnetic switching valve is disposed in the first middle branch pipe The second inlet three-way electromagnetic switching valve is disposed between the fresh air heat exchanger and the dust removing filter, and the third air inlet three-way electromagnetic switching valve is disposed at the fresh air heat exchanger and the end. Between the segments entering the air duct, the fourth air inlet three-way electromagnetic switching valve is disposed between the second air inlet three-way electromagnetic switching valve and the dust removing filter, and the fifth air inlet three-way electromagnetic switching valve is disposed in the third Between the three-way electromagnetic switching valve and the last-stage air inlet pipe, the first-stage air inlet pipe passes through the first middle-stage branch pipe through the first air-inlet three-way electromagnetic switching valve, the second air-inlet three-way electromagnetic switching valve, the fresh air heat exchanger, The third air inlet three-way electromagnetic switching valve, the dust removing filter, the fourth air inlet three-way electromagnetic switching valve and the fifth air inlet three-way electromagnetic switching valve are connected with the last stage air inlet pipe.

The dust filter is an electrostatic precipitator filter, and the electrostatic precipitator filter is connected with an inlet pipe for cleaning and a drain pipe for discharging sewage, and the inlet pipe is provided with an inlet and outlet valve, the drain pipe The upper part is provided with a drainage on-off valve, and the electrostatic precipitator filter is further provided with a water pump for introducing water from the inlet pipe into the electrostatic precipitator filter.

The advantages of the present invention over the prior art are:

In the control method of the fresh air air conditioning system of the present invention, after the power is initialized, the outdoor temperature sensor feeds back the detection signal to the host controller, and the host controller analyzes and compares the outdoor temperature t with the preset temperature t1, and the host controller The judgment result controls the sequence of switching the fresh air through the fresh air heat exchanger and the dust filter. When the fresh air passes through the dust filter and the fresh air heat exchanger in turn, the fresh air is first purified and filtered before being exchanged for cold and heat to avoid fresh air heat exchange. The ash is accumulated inside the device, which can reduce the maintenance work of the fresh air heat exchanger and greatly extend the service life of the fresh air heat exchanger. When the fresh air passes through the fresh air heat exchanger and the dust filter in turn, the fresh air is first exchanged and then purified. Filtration, suitable for areas with extremely low outdoor temperature in the north, preventing cold air from causing icing in the dust filter, avoiding wind resistance increase, ensuring dust removal effect, and its operation is very convenient, greatly improving the scope of application, and step S2 and step S3 Cyclically, real-time detection, real-time judgment, real-time switching, and improved automation And, in the method, the detecting, judging and switching steps all reduce the energy consumption before the power transmitting step of the blower and the exhaust fan. In the fresh air conditioning system of the present invention, the fresh air duct and the exhaust duct are arranged in the air conditioner, and the fresh air duct is connected to the outdoor via the fresh air heat exchanger and the dust filter, and the exhaust duct is connected to the outdoor via the fresh air heat exchanger, and the blower is arranged at At the air supply opening of the fresh air duct, the exhaust fan is arranged at the air outlet of the exhaust duct, the external temperature sensor is set outdoors, the dust filter, the blower and the exhaust fan are electrically connected with the host controller and the host controller controls the switching of the fresh air flow. The sequence of the fresh air heat exchanger and the dust filter has the advantages of simple structure, convenient use, low energy consumption and high dust reduction efficiency.

[Description of the Drawings]

1 is a flow chart of Embodiment 1 of a control method of the present invention.

2 is a flow chart of Embodiment 2 of the control method of the present invention.

3 is a flow chart of Embodiment 3 of the control method of the present invention.

4 is a flow chart of Embodiment 4 of the control method of the present invention.

Figure 5 is a schematic view showing the structure of the fresh air conditioning system of the present invention.

The numbers in the figure indicate:

1, the host controller; 2, outdoor temperature sensor; 3, fresh air heat exchanger; 4, dust filter; 41, inlet pipe; 411, inlet and outlet valves; 42, drain pipe; 421, drainage on-off valve; 43. Pumping pump; 5, air conditioning; 6, fresh air duct; 61, first section air inlet duct; 62, middle section air inlet duct; 621, first middle section branch pipe; 622, second middle section branch pipe; 6221 first air inlet three-way electromagnetic Switching valve; 6222, second air inlet three-way electromagnetic switching valve; 6223, third air inlet three-way electromagnetic switching valve; 6224, fourth air inlet three-way electromagnetic switching valve; 6225, fifth air inlet three-way electromagnetic switching valve ; 63, the end of the air duct; 7, the exhaust duct; 8, the blower; 9, exhaust fan.

【detailed description】

The invention will be further described in detail below in conjunction with the drawings and specific embodiments.

Example 1:

In a first embodiment of the control method for the fresh air conditioning system of the present invention, the air conditioning system includes a host controller 1, an outdoor temperature sensor 2, a fresh air heat exchanger 3, a dust filter 4, an air conditioner 5, a fresh air duct 6, The exhaust duct 7, the blower 8 and the exhaust fan 9, the fresh air duct 6 is provided with a switching pipeline capable of switching the fresh air flowing through the fresh air heat exchanger 3 and the dust removing filter 4, and FIG. 1 shows the flow of the control method. The control method includes the following steps:

S1: The host is powered on and initialized;

S2: detecting the outdoor temperature t;

S3: comparing the outdoor temperature t with the switching preset temperature t1, when t≤t1, switching the fresh air heat exchanger 3 in front, the dust removing filter 4 is behind, when t>t1, switching the fresh air heat exchanger 3 in After the dust filter 4 is in front, the steps S2 and S3 are kept looping, and proceeds to step S4;

S4: starting the air conditioner 5;

S5: The blower 8 and the exhaust fan 9 are powered.

In the method, after the host is powered on and initialized, the outdoor temperature sensor 2 feeds back the detection signal to the host controller 1. The host controller 1 compares the outdoor temperature t with the preset temperature t1, and the host controller 1 controls the switching according to the judgment result. The fresh air flows through the sequence of the fresh air heat exchanger 3 and the dust filter 4, and when the fresh air passes through the dust filter 4 and the fresh air heat exchanger 3 in sequence, the fresh air is first purified and filtered, and then exchanged for cold and heat to avoid fresh air heat exchange. The ash is accumulated in the device 3, thereby reducing the maintenance work on the fresh air heat exchanger 3, and greatly prolonging the service life of the fresh air heat exchanger 3. When the fresh air passes through the fresh air heat exchanger 3 and the dust filter 4 in sequence, the fresh air first Cold and heat exchange and purification filtration is suitable for areas with extremely low outdoor temperature in the north. It prevents cold air from causing icing in the dust filter 4, avoids windage increase and ensures dust removal effect. The operation is very convenient and greatly improves the scope of application. Step S2 and step S3 are cyclically performed to ensure real-time detection, real-time judgment, real-time switching, and improvement of automation degree, and the method , Testing, Both the judgment and the switching steps greatly reduce the energy consumption before the power transmitting step of the blower 8 and the exhaust fan 9.

In this embodiment, before comparing the outdoor temperature t and the preset preset temperature t1, the preset preset temperature t1 is preset, wherein -20 ° C ≤ t1 ≤ -5 ° C, and the outdoor temperature t only needs to be compared with the t1. Easy to operate.

In this embodiment, when the fresh air heat exchanger 3 and the dust removing filter 4 are sequentially switched, the fresh air flows through the fresh air heat exchanger 3 by controlling the three-way electromagnetic switching valve provided on the switching pipe and the fresh air pipe 6 . And the sequence of the dust filter 4, the three-way electromagnetic switching valve is electrically connected to the host controller 1, and when the host controller 1 obtains the judgment result, the three-way electromagnetic switching valve is controlled to be turned on and off, thereby realizing the change of the new airflow. The sequence of the fresh air heat exchanger 3 and the dust filter 4 is passed.

Example 2:

As shown in FIG. 2, the flow of the second embodiment of the control method of the fresh air conditioning system of the present invention is substantially the same as that of the first embodiment, except that the dust filter 4 is an electrostatic dust filter. When the blower 8 and the exhaust fan 9 are powered, the electrostatic precipitator filter is powered, that is, the electrostatic dust removal method can improve the dust removal efficiency.

Example 3:

As shown in FIG. 3, the flow of the third embodiment of the control method of the fresh air conditioning system of the present invention is substantially the same as that of the first embodiment, except that the following steps are included:

S1: The host is powered on and initialized;

S2: the blower 8 and the exhaust fan 9 are powered;

S3: Detecting the outdoor temperature t.

S4: comparing the outdoor temperature t with the switching preset temperature t1: when t≤t1, switching the fresh air heat exchanger 3 in front and the dust removing filter 4 in the rear, when t>t1, switching the fresh air heat exchanger 3 in After the dust filter 4 is in front, the steps S3 and S4 are kept looping, and proceeds to step S5;

S5: starting the air conditioner 5;

In the method, after the host is powered on and initialized, the blower 8 and the exhaust fan 9 are powered, and then the outdoor temperature t is compared with the preset temperature t1. When t≤t1, the fresh air heat exchanger 3 is switched, and the dust filter 4 is switched. After that, when t>t1, the fresh air heat exchanger 3 is switched, the dust filter 4 is in front, and the air conditioner 5 is finally turned on, and the fresh air flowing through the fresh air heat exchanger 3 and the dust filter 4 can also be switched. Sequence, its operation is very convenient, greatly improving the scope of application, and steps S3 and S4 are cyclically performed to ensure real-time detection, real-time judgment, real-time switching, and improve the degree of automation, and in this method, the detection, judgment and switching steps are all After the power transmitting step of the blower 8 and the exhaust fan 9, it is ensured that air exchange can be performed indoors and outdoors after starting up, which is suitable for indoor air quality poorly and when indoor and outdoor air convection is urgently needed.

Example 4:

As shown in FIG. 4, the flow of the fourth embodiment of the control method of the fresh air conditioning system of the present invention is basically the same as that of the third embodiment, except that the dust filter 4 is an electrostatic dust filter. When the blower 8 and the exhaust fan 9 are powered, the electrostatic precipitator filter is powered, that is, the electrostatic dust removal method can improve the dust removal efficiency.

As shown in FIG. 5, in addition to the embodiment of the present invention, the air conditioning system includes a host controller 1, an outdoor temperature sensor 2, a fresh air heat exchanger 3, a dust filter 4, an air conditioner 5, a fresh air duct 6, and a row. The air duct 7, the blower 8 and the exhaust fan 9, the fresh air duct 6 is provided with a switching pipeline capable of switching the fresh air flowing through the fresh air heat exchanger 3 and the dust removing filter 4, and the fresh air duct 6 and the exhaust duct 7 are arranged in the air conditioner. In the 5th, the fresh air duct 6 is connected to the outdoor via the fresh air heat exchanger 3 and the dust removing filter 4, and the exhaust duct 7 is connected to the outdoor via the fresh air heat exchanger 3, and the blower 8 is arranged at the air supply opening of the fresh air duct 6, the exhaust fan 9 The outdoor temperature sensor 2 is disposed outside the air outlet of the exhaust duct 7, and the dust filter 4, the blower 8 and the exhaust fan 9 are electrically connected to the host controller 1 and the host controller 1 controls the switching of the fresh air through the fresh air heat. The sequence of the exchanger 3 and the dust removing filter 4, that is, the fresh air can be switched on the fresh air duct 6, when the fresh air passes through the dust removing filter 4 and the fresh air heat exchanger 3 in sequence, the fresh air is first purified and filtered before being exchanged for hot and cold exchange. Can avoid The ash is accumulated in the fresh air heat exchanger 3, thereby reducing the maintenance work on the fresh air heat exchanger 3, and greatly prolonging the service life of the fresh air heat exchanger 3, when the fresh air passes through the fresh air heat exchanger 3 and the dust filter 4 in turn, The fresh air is first cooled and exchanged for re-purification and filtration, and is suitable for areas with extremely low outdoor temperatures in the north.

In this embodiment, the fresh air duct 6 includes a first section air inlet duct 61, a middle section air inlet duct 62, and a last section air inlet duct 63. The first section air inlet duct 61 is connected to the outdoor, and the blower 8 is located on the last section air inlet duct 63 and is adjacent to the air supply port, and the middle section is air inlet. The tube 62 includes a first middle branch pipe 621 that sequentially connects the dust filter 4 and the fresh air heat exchanger 3, and a second middle pipe 622 that sequentially connects the fresh air heat exchanger 3 and the dust filter 4, in which fresh air is supplied from the first air inlet pipe 61 enters, is sent from the end section air duct 63 to the indoor, when the fresh air is in the middle section of the air duct 62, the flow direction can be switched between the first middle section branch pipe 621 and the second middle section branch pipe 622, when the fresh air flows from the first middle section branch pipe 621 When the air duct 63 is introduced into the end section, the fresh air passes through the dust filter 4 and the fresh air heat exchanger 3 in sequence. When the fresh air passes from the second middle branch pipe 622 to the last air inlet pipe 63, the fresh air passes through the fresh air heat exchanger 3 and dust removal in sequence. Filter 4, the fresh air is first exchanged for hot and cold exchange and then purified and filtered. It is suitable for extremely cold regions with large temperature difference in the north. It has simple structure and convenient use.

In this embodiment, the first stage air inlet duct 61 is connected to the end air inlet duct 63 through the dust removing filter 4 and the fresh air heat exchanger 3 through the first middle section branch pipe 621, that is, the dust removing filter 4 and the fresh air heat exchanger 3 are located in the first middle section. On the branch pipe 621, when fresh air enters the first middle branch pipe 621, the fresh air is first purified and filtered for hot and cold exchange, and the structure is simple and easy to implement.

In this embodiment, the second middle branch pipe 622 includes a first inlet three-way electromagnetic switching valve 6221, a third intake three-way electromagnetic switching valve 6223, and a fourth inlet air, which are provided at the first middle branch pipe 621. Three-way electromagnetic switching valve 6224 and second inlet three-way electromagnetic switching valve 6222 and fifth inlet three-way electromagnetic switching valve 6225 capable of switching inlets, first The air inlet three-way electromagnetic switching valve 6221 is disposed between the first middle branch pipe 621 and the first air inlet pipe 61, and the second air inlet three-way electromagnetic switching valve 6222 is disposed between the fresh air heat exchanger 3 and the dust removing filter 4, and the third The air inlet three-way electromagnetic switching valve 6223 is disposed between the fresh air heat exchanger 3 and the final air inlet pipe 63, and the fourth air inlet three-way electromagnetic switching valve 6224 is disposed in the second air inlet three-way electromagnetic switching valve 6222 and the dust filter. The fifth inlet three-way electromagnetic switching valve 6225 is disposed between the third inlet three-way electromagnetic switching valve 6223 and the last stage inlet duct 63, and the first section of the inlet duct 61 passes through the first middle section branch 621 and sequentially passes through the first inlet three-way Electromagnetic switching valve 6221, second air inlet three-way electromagnetic switching valve 6222, fresh air heat exchanger 3, third air inlet three-way electromagnetic switching valve 6223, dust removing filter 4, fourth air inlet three-way electromagnetic switching valve 6224 and The five-inlet three-way electromagnetic switching valve 6225 is connected to the last stage air inlet pipe 63. In the structure, the first air inlet three-way electromagnetic switching valve 6221, the second air inlet three-way electromagnetic switching valve 6222, and the third air inlet three-way are connected. Electromagnetic switching valve 6223, fourth air inlet three-way electromagnetic switching valve 6224 and fifth The wind three-way electromagnetic switching valve 6225 controls the entrance and exit direction to realize the switching of the fresh air flow direction, and has a simple structure and a clever design.

In the embodiment, the dust filter 4 is an electrostatic dust filter, and the electrostatic dust filter is connected with an inlet pipe 41 for cleaning and a drain pipe 42 for discharging sewage. The inlet pipe 41 is provided with an inlet and outlet valve 411. The drain pipe 42 is provided with a drain on-off valve 421, and the electrostatic precipitator filter is further provided with a water pump 43 for introducing water from the inlet pipe 41 into the electrostatic precipitator filter, and the electrostatic precipitator filter adopts electrostatic dust removal. The utility model can purify and filter the fresh air, and can realize the function of removing the PM2.5 micro particles, and the cleaning of the dust removing component is the inlet and outlet water cleaning (may be spray cleaning or water storage type cleaning, in the embodiment, the water storage type cleaning) When in use, the inlet pipe 41 on the electrostatic precipitator filter can be connected to an external water source, and then the pumping water pump 43 can be turned on to inject water from the inlet pipe 41 into the water storage zone of the electrostatic precipitator filter to clean the electrostatic precipitator assembly. After that, the accumulated water is discharged from the drain pipe 42, and the water inlet and outlet valve 411 is opened and closed to control the water injection amount, and then the water discharge and discharge valve 421 is opened and closed to realize the discharge of the water. Simple and practical.

In other embodiments, the water inlet pipe 41 on the electrostatic precipitator filter can be connected to the water pipe in the room itself, and the cleaning function of the electrostatic precipitator assembly can be realized in real time, and the structure is simple and convenient to use.

Although the invention has been disclosed above in the preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention by using the above-disclosed technical contents, or modify the equivalent implementation of equivalent changes without departing from the scope of the technical solutions of the present invention. example. Therefore, any simple modifications, equivalent changes, and modifications to the above embodiments in accordance with the teachings of the present invention should fall within the scope of the present invention.

Claims

The invention relates to a control method for a fresh air air conditioning system, characterized in that: the air conditioning system comprises a host controller (1), an outdoor temperature sensor (2), a fresh air heat exchanger (3), a dust filter (4), and an air conditioner. (5) Fresh air duct (6), exhaust duct (7), blower (8) and exhaust fan (9), the fresh air duct (6) is equipped with a switchable fresh air flowing through the fresh air heat exchanger (3) And the dust removal filter (4) sequentially switches the pipeline,

The method includes the following steps:

S1: The host is powered on and initialized;

S2: detecting the outdoor temperature t;

S3: comparing the outdoor temperature t with the preset temperature t1, when t≤t1, switching the fresh air heat exchanger (3) in front, the dust filter (4) in the rear, and when t>t1, switching the new wind heat The exchanger (3) is in the rear, the dust filter (4) is in front, the steps S2 and S3 are kept looping, and proceeds to step S4;

S4: start the air conditioner (5);

S5: The blower (8) and the exhaust fan (9) are powered.
The invention relates to a control method for a fresh air air conditioning system, characterized in that: the air conditioning system comprises a host controller (1), an outdoor temperature sensor (2), a fresh air heat exchanger (3), a dust filter (4), and an air conditioner. (5) Fresh air duct (6), exhaust duct (7), blower (8) and exhaust fan (9), the fresh air duct (6) is equipped with a switchable fresh air flowing through the fresh air heat exchanger (3) And the dust removal filter (4) sequentially switches the pipeline,

The method includes the following steps:

S1: The host is powered on and initialized;

S2: the blower (8) and the exhaust fan (9) are powered;

S3: detecting the outdoor temperature t;

S4: Comparing the outdoor temperature t and the switching preset temperature t1: when t≤t1, switching the fresh air heat exchanger (3) in front, the dust filter (4) in the rear, and when t>t1, switching the new wind heat The exchanger (3) is in the rear, the dust filter (4) is in front, the steps S3 and S4 are kept looping, and proceeds to step S5;

S5: Start the air conditioner (5).
The control method for a fresh air conditioning system according to claim 1 or 2, characterized in that before the outdoor temperature t and the preset temperature t1 are switched, the preset preset temperature t1 is preset, wherein -20 ° C ≤ t1 ≤-5 °C.
The method for controlling a fresh air conditioning system according to claim 1 or 2, wherein when the fresh air heat exchanger (3) and the dust filter (4) are switched in sequence, the pair is disposed in the switching line and The control of the three-way electromagnetic switching valve on the fresh air pipe (6) changes the order in which the fresh air flows through the fresh air heat exchanger (3) and the dust filter (4).
The method for controlling a fresh air conditioning system according to claim 1 or 2, characterized in that: the dust removing filter (4) is an electrostatic dust removing filter, and supplies power to the feeding fan (8) and the exhaust fan (9). At the same time, the electrostatic precipitator filter is powered.
An air conditioning system for implementing the control method according to any one of claims 1 to 5, characterized by comprising a host controller (1), an outdoor temperature sensor (2), a fresh air heat exchanger (3), Dust filter (4), air conditioner (5), fresh air duct (6), exhaust duct (7), blower (8) and exhaust fan (9), the fresh air duct (6) is equipped with a switchable new air flow The fresh air heat exchanger (3) and the dust removal filter (4) are sequentially switched, and the fresh air duct (6) and the exhaust air duct (7) are disposed in the air conditioner (5), and the fresh air duct (6) The fresh air heat exchanger (3) and the dust filter (4) are connected to the outdoor, the exhaust duct (7) is connected to the outdoor via a fresh air heat exchanger (3), and the blower (8) is arranged in the fresh air duct. (6) at the air supply opening, the exhaust fan (9) is disposed at an air outlet of the exhaust duct (7), the outdoor temperature sensor (2) is disposed outdoors, the dust filter (4), the blower (8) The exhaust fan (9) is electrically connected to the host controller (1) and the host controller (1) controls the sequence of switching the fresh air through the fresh air heat exchanger (3) and the dust filter (4).
The fresh air conditioning system according to claim 6, wherein the fresh air duct (6) comprises a first air inlet duct (61), a middle air inlet duct (62), and a final air intake duct (63), the first The section inlet duct (61) is in communication with the outdoor, the blower (8) is located on the end section air inlet duct (63) and is adjacent to the air supply port, and the middle section air inlet duct (62) includes a dust filter (4) in turn and The first middle branch pipe (621) of the fresh air heat exchanger (3) and the second middle branch pipe (622) that sequentially connects the fresh air heat exchanger (3) and the dust filter (4).
The fresh air conditioning system according to claim 7, wherein the first inlet air duct (61) passes through the first middle branch pipe (621) through the dust filter (4) and the fresh air heat exchanger (3) in sequence. The final inlet duct (63) is connected.
The antifriction fresh air conditioning system according to claim 7, wherein said second middle branch pipe (622) comprises a first inlet three-way electromagnetic switching of a switchable outlet provided on the first middle branch pipe (621) Valve (6221), third air inlet three-way electromagnetic switching valve (6223) and fourth air inlet three-way electromagnetic switching valve (6224) and second inlet three-way electromagnetic switching valve (6222) and fifth for switchable inlet The air inlet three-way electromagnetic switching valve (6225) is disposed between the first middle branch pipe (621) and the first air inlet pipe (61), and the second air inlet The three-way electromagnetic switching valve (6222) is disposed between the fresh air heat exchanger (3) and the dust removing filter (4), and the third air inlet three-way electromagnetic switching valve (6223) is disposed in the fresh air heat exchanger (3) The fourth inlet three-way electromagnetic switching valve (6224) is disposed between the second inlet three-way electromagnetic switching valve (6222) and the dust removing filter, and the fifth inlet The wind three-way electromagnetic switching valve (6225) is disposed between the third air inlet three-way electromagnetic switching valve (6223) and the last stage air inlet pipe (63), and the first stage air inlet pipe (61) is sequentially passed through the first middle branch pipe (621) First intake air three-way electromagnetic switching valve (6221), second air inlet three-way electromagnetic switching valve (6222), fresh air heat exchanger (3), third air inlet three-way electromagnetic switching valve (6223), dust filter (4), fourth air inlet three The electromagnetic switching valve (6224) and the fifth inlet three-way electromagnetic switching valve (6225) are in communication with the final inlet duct (63).
The antifriction fresh air conditioning system according to claim 6, wherein the dust removing filter (4) is an electrostatic precipitator filter, and the electrostatic precipitating filter is connected with an inlet pipe (41) for cleaning and a drain pipe (42) for discharging sewage, wherein the inlet pipe (41) is provided with an inlet water shut-off valve (411), and the drain pipe (42) is provided with a drain on-off valve (421), and the electrostatic dust filter A pump (43) for introducing water from the inlet pipe (41) into the electrostatic precipitator filter is also installed.