Fresh air treatment system

Abstract

The invention provides a fresh air treatment system. The fresh air processing system comprises a fresh air handling unit and an air quantity distributor. The air quantity distributor is provided with a shell. The inlet end of the blast pipe is connected with the air outlet of the distributor, and the outlet end is communicated with indoor space; the air valves are connected with the air supply pipes in a one-to-one correspondence mode and used for controlling the flow of airflow in the air supply pipes. The outlet end of each air supply pipe is provided with at least one pressure difference sensor; the controller is connected with the pressure difference sensor and the air valve; the controller is configured to detect the pressure difference values of the outlet end of the air supply pipe through the pressure difference sensor, judge the maximum pressure difference value Pmax and the minimum pressure difference value Pmin in all the pressure difference values, and calculate whether the difference value A of the Pmax and the Pmin reaches a preset difference value A0 or not; if A reaches the preset difference value A0, an air valve P is driven to be opened at the second opening degree, and the air valve P is arranged on the air supply pipe where the differential pressure sensor detecting the maximum differential pressure value Pmax is located; and when the pressure difference value Pmax is detected, the opening degree of the air valve P is the first opening degree, and the second opening degree is larger than the first opening degree.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a fresh air processing system. Background Art

[0002] With the rapid development of fresh air treatment systems, people have put forward requirements for more precise regulation of fresh air volume in fresh air treatment systems.

[0003] The fresh air processing system includes a fresh air unit and an air volume distributor. The fresh air unit includes a fresh air inlet pipe connecting the indoor space and the outdoor space. The air flows from the outdoor space along the fresh air inlet pipe to the fresh air unit. The fresh air unit is usually equipped with a filter to filter impurities in the fresh air. Some fresh air units are equipped with a heat exchanger and a humidity control device for adjusting the temperature of the fresh air, so that the fresh air can meet the temperature and humidity requirements of the room.

[0004] Fresh air units are usually set up to provide fresh air to multiple rooms. In order to make the fresh air flow more evenly and orderly, the fresh air usually needs to flow into an air volume distributor for distribution after passing through the fresh air unit.

[0005] In the prior art, the distributor outlet of the air volume distributor is connected to an air supply pipe, and the other end of the air supply pipe is connected to the indoor space. Since the distances between different rooms and the air volume distributor are different, the lengths of the air supply pipes are different, and sometimes the air supply pipes are blocked. Even if the air volume distributed to each air supply pipe by the air volume distributor is the same, the actual air volume reaching the room is different due to the different resistances of the air supply pipes, resulting in uneven fresh air output, and the fresh air volume is not flexible enough to be adjusted. It can only be adjusted by adjusting the speed of the fan, resulting in the fresh air volume in each room can only be roughly adjusted. Summary of the invention

[0006] The present invention solves one of the technical problems in the related art at least to a certain extent.

[0007] To this end, the present application aims to provide a fresh air processing system.

[0008] The fresh air treatment system according to the present application includes:

[0009] A fresh air unit connected to the outdoor space through an air inlet pipe;

[0010] An air volume distributor is communicated with the fresh air unit so that air flows from the fresh air unit into the air volume distributor, and has a shell;

[0011] A distributor air outlet, which is arranged on the housing;

[0012] At least two air supply pipes, whose inlet ends are connected to the air outlet of the distributor and whose outlet ends are connected to the indoor space;

[0013] At least two air valves, which are connected to the air supply pipes one by one and are used to control the flow rate of the air flow in the air supply pipes;

[0014] A differential pressure sensor, at least one differential pressure sensor is provided on the outlet end of each air supply pipe;

[0015] A controller is connected to the differential pressure sensor and the air valve; the controller is configured to:

[0016] The pressure difference value at the outlet of the air supply pipe is detected by the pressure difference sensor, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are determined, and the difference value A between Pmax and Pmin is calculated to determine whether it reaches the preset difference value A0;

[0017] If A reaches the preset difference value A0, the air valve P is driven to open at the second opening, wherein the air valve P is arranged on the air supply pipe where the pressure difference sensor that detects the maximum pressure difference value Pmax is located;

[0018] When the pressure difference value Pmax is detected, the opening degree of the air valve P is a first opening degree, and the second opening degree is greater than the first opening degree.

[0019] In some embodiments of the present application, the controller is configured as follows: if A≤A0, all air valves are opened at a first opening degree;

[0020] The preset difference value A0 is the maximum pressure difference value of the pressure difference between the two rooms when the difference in fresh air volume between the two rooms is within a preset range.

[0021] In some embodiments of the present application, the controller is configured to:

[0022] When receiving the first signal, the air valves are driven to open at their respective preset initial openings;

[0023] The pressure difference value at the outlet end of the air supply pipe is then detected by a pressure difference sensor.

[0024] In some embodiments of the present application, the controller is configured to:

[0025] If A reaches the preset difference A0, the air valve P is driven to open at the second opening, and then the pressure difference value at the outlet of the air supply pipe is detected by the pressure difference sensor, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are judged, and the difference A between Pmax and Pmin is calculated, until it is calculated that: the difference A between Pmax and Pmin reaches the preset difference A0, then the pressure difference value at the outlet of the air supply pipe is stopped.

[0026] In some embodiments of the present application, there is a fixed difference between the first opening and the second opening, and the fixed difference is no greater than 10°.

[0027] The fresh air processing system according to the present application includes: a fresh air unit connected to an outdoor space through an air inlet pipe;

[0028] An air volume distributor is communicated with the fresh air unit so that air flows from the fresh air unit into the air volume distributor, and has a shell;

[0029] A distributor air outlet, which is arranged on the housing;

[0030] At least two air supply pipes, whose inlet ends are connected to the air outlet of the distributor and whose outlet ends are connected to the indoor space;

[0031] At least two air valves, which are connected to the air supply pipes one by one and are used to control the flow rate of the air flow in the air supply pipes;

[0032] A differential pressure sensor, at least one differential pressure sensor is provided on the outlet end of each air supply pipe;

[0033] A controller is connected to the differential pressure sensor and the air valve; the controller is configured to:

[0034] The pressure difference value at the outlet of the air supply pipe is detected by the pressure difference sensor, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are determined, and it is calculated whether the difference value A between Pmax and Pmin reaches the preset difference value A0, and whether Pmin reaches the preset difference value B;

[0035] If so, it is determined that the pressure difference of the pressure differences of different air supply pipes is large, and the minimum pressure difference value does not meet the normal air supply demand, and the air valve P is driven to open at the second opening, and the air valve P is arranged on the air supply pipe where the pressure difference sensor that detects the maximum pressure difference value Pmax is located;

[0036] When the pressure difference value Pmax is detected, the opening of the air valve P is the first opening, and the second opening is greater than the first opening;

[0037] When the opening of the air valve P reaches the maximum opening, the air valve q is driven to open at the fourth opening, and the air valve q is arranged on the air supply pipe where the pressure difference sensor that detects the minimum pressure difference value Pmin is located;

[0038] The opening degree of the air valve q for detecting the pressure difference value Pmin is the third opening degree, and the fourth opening degree is smaller than the third opening degree.

[0039] In some embodiments of the present application, the controller is configured to: after receiving the first signal, the air valves are opened at respective preset initial openings;

[0040] Then, the pressure difference value at the outlet of the air supply pipe is detected by the pressure difference sensor, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are determined, and the difference value A is calculated, A=Pmax-Pmin;

[0041] If A>A0, or Pmin≥B, the air valve P is driven to open at a second opening, which is greater than the initial opening.

[0042] In some embodiments of the present application, the fresh air processing system includes a first fan and a second fan, and the first fan and the second fan are connected to a controller;

[0043] The controller is configured as:

[0044] After receiving the first signal, driving the first fan to rotate;

[0045] When the opening of the air valve q is equal to the minimum opening, if Pmin≥B, the second fan is driven to rotate.

[0046] In some embodiments of the present application, the fresh air processing system includes a first fan and a second fan, and the first fan and the second fan are connected to a controller;

[0047] The controller is configured as:

[0048] After receiving the first signal, driving the first fan to rotate;

[0049] When the opening of the air valve q is equal to the minimum opening, if Pmin<B,

[0050] When the first fan rotates at the maximum speed, the second fan is driven to rotate.

[0051] In some embodiments of the present application, the controller is configured to:

[0052] The second fan rotates at the maximum speed to determine the magnitude relationship between A and A0;

[0053] If A≤A0, the second fan rotates at the current speed and the first fan rotates at the current speed; if A<A0, it is determined that the air supply duct filter is blocked, and a prompt message is issued to remind the user to replace the filter in the air supply duct corresponding to the air valve P.

[0054] In some embodiments of the present application, the controller is configured to:

[0055] When the opening of the air valve q is equal to the minimum opening, if Pmin<B, when the current speed of the first fan is not greater than the maximum speed, the first fan is driven to rotate at a preset speed, and the preset speed is greater than the current speed.

[0056] This application has at least the following positive effects:

[0057] The present invention proposes a fresh air processing system. The fresh air processing system includes a fresh air unit and an air volume distributor, the air volume distributor has a shell; the inlet end of the air supply pipe is connected to the air outlet of the distributor, and the outlet end thereof is connected to the indoor space; the air valve is connected to the air supply pipe in a one-to-one correspondence, and is used to control the flow rate of the air flow in the air supply pipe; at least one pressure difference sensor is provided on the outlet end of each air supply pipe; a controller is connected to the pressure difference sensor and the air valve; the controller is configured to: detect the pressure difference value at the outlet end of the air supply pipe through the pressure difference sensor, determine the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values, and calculate whether the difference A between Pmax and Pmin reaches the preset difference A0; if A reaches the preset difference A0, then Drive the air valve P to open at the second opening, wherein the air valve P is arranged on the air supply duct where the pressure difference sensor that detects the maximum pressure difference value Pmax is located; when the pressure difference value Pmax is detected, the opening of the air valve P is the first opening, and the second opening is greater than the first opening. When the pressure difference is greater, the resistance of the air supply duct is greater, and the amount of fresh air in the corresponding room is less. In order to make the fresh air volume in the room more evenly distributed, the controller increases the opening of the air valve P in the room corresponding to Pmax to the second opening to increase the ventilation area of ​​the air valve, so that more fresh air flows into the air supply duct from the air valve P, so that the fresh air volume in the room corresponding to Pmax is increased, thereby achieving the effect of evenly distributing the fresh air volume in each room. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0059] Figure 1 is a system connection diagram of a fresh air treatment system according to an embodiment of the present application;

[0060] Figure 2 is a partial enlarged diagram of a system connection diagram of a fresh air treatment system according to an embodiment of the present application;

[0061] Figure 3 is a schematic diagram of a first flow equalizing plate of a fresh air treatment system according to an embodiment of the present application;

[0062] Figure 4 is a schematic diagram of an open state of a first flow equalizing plate of a fresh air treatment system according to an embodiment of the present application;

[0063] Figure 5 is a schematic diagram of a second flow equalizing plate of a fresh air treatment system according to an embodiment of the present application;

[0064] Figure 6is a partial enlarged view of the second flow equalizing plate of the fresh air processing system according to the embodiment of the present application;

[0065] Figure 7 is a connection diagram of a controller and some components of a fresh air treatment system according to an embodiment of the present application;

[0066] Figure 8 is a schematic diagram of a fresh air treatment system according to an embodiment of the present application;

[0067] Fig. 9 is a partial enlarged view of a fresh air treatment system according to an embodiment of the present application;

[0068] Fig.10 is a connection diagram of a controller and some components of a fresh air treatment system according to an embodiment of the present application;

[0069] Fig.11 is a flow chart of a first working process of a fresh air treatment system according to an embodiment of the present application;

[0070] Fig.12 is a flow chart of a second working process of a fresh air treatment system according to an embodiment of the present application;

[0071] Fig.13 is a flowchart of a third working process of the fresh air treatment system according to an embodiment of the present application;

[0072] Fig.14 is a flowchart of a fourth working process of the fresh air treatment system according to an embodiment of the present application;

[0073] Fig.15 is a flowchart of a fifth working process of the fresh air treatment system according to an embodiment of the present application;

[0074] In the above figures:

[0075] 100. Fresh air treatment system 100; 1. Fresh air unit; 2. Air inlet duct; 3. Air volume distributor; 31. Shell; 311. Distributor air inlet; 312. Distributor air outlet; 32. First flow equalizing plate; 321. Louver; 323. First flow equalizing port; 33. Second flow equalizing plate; 331. Baffle; 332. Second flow equalizing port; 34. Air supply duct; 35. Air valve; 4. Pressure difference sensor; 5. Indoor human sensor; 61. First fan; 62. Second fan; 7. Connecting pipe. DETAILED DESCRIPTION

[0076] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0077] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0078] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0079] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the following, reference will be made to the Figure 1-15 The embodiments of the present application are described in detail.

[0081] In recent years, with the continuous improvement of people's living standards, people have higher and higher requirements for the air quality of indoor office or living environments.

[0082] In order to improve the air quality in the indoor space, people usually install a fresh air treatment system 100 to introduce fresh air into the room and exhaust the dirty air in the room. After the fresh air is processed by the fresh air treatment system 100, it passes through the air volume distributor 3 to make the fresh air flow more uniform, and then is transported to a single room through a branch pipeline.

[0083] When the air volume delivered by each branch duct is uneven, the amount of fresh air entering each room will be uneven.

[0084] In the prior art, a plug valve or an air volume regulating valve is usually added to alleviate the problem of uneven air volume distribution by adjusting the valve. Multiple valve plates or guide plates are arranged in the air volume regulating valve so that the valve plates rotate under the thrust of the air flow to change the amount of conveyed gas. These air volume regulating devices can only achieve uniform air volume distribution by adding special structures. This method requires the redesign of the air volume regulating valve, resulting in high production and assembly costs of the air volume regulating valve, and the air volume regulation effect is relatively general.

[0085] In order to make the air volume distributor 3 distribute the air volume more evenly, the present application proposes a fresh air processing system 100, including a fresh air unit 1 and an air volume distributor 3, the air volume distributor 3 is provided with a first flow equalizing plate 32 and a second flow equalizing plate 33 that can evenly distribute the airflow, so that the fresh air in each room can be distributed more evenly.

[0086] Reference Figure 1 The fresh air processing system 100 includes a fresh air unit 1, an air volume distributor 3, an air valve 35 and an air supply pipe 34. The fresh air unit 1 includes an air inlet pipe 2, which connects the indoor space and the outdoor space. The air flow in the outdoor space flows into the fresh air unit 1 through the air inlet pipe 2.

[0087] In some embodiments, the fresh air unit 1 is provided with a fan, a heat exchanger and a filter. The heat exchanger can change the temperature and humidity of the fresh air so that the fresh air has little impact on the temperature and humidity of the indoor environment when it is delivered into the room, thereby increasing the comfort of the user; the fan provides power for the airflow to enter the fresh air unit 1 from the outdoor space; the filter can filter impurities in the fresh air to improve the cleanliness of the fresh air.

[0088] The fresh air unit 1 and the air volume distributor 3 are connected via a connecting pipe 7 , and the fresh air processed by the fresh air unit 1 enters the air volume distributor 3 through the connecting pipe 7 .

[0089] The air volume distributor 3 is used to convert the turbulent flow of fresh air into uniform and orderly flow of fresh air, including a shell 31 and a flow equalizer. The shell 31 is provided with a distributor air outlet 312 and a distributor air inlet 311. The distributor air outlet 312 is connected to the air valve 35, the air valve 35 is connected to the air supply pipe 34, the other end of the air supply pipe 34 is connected to the indoor space, the distributor air inlet 311 is connected to the connecting pipe 7, and the connecting pipe 7 is connected between the fresh air unit 1 and the distributor air inlet 311.

[0090] Fresh air enters the air volume distributor 3 from the connecting pipe 7, and flows into the indoor space after passing through the first flow equalizing plate 32, the second flow equalizing plate 33, the air valve 35 and the air supply pipe 34 in sequence, thereby improving the air quality of the indoor space.

[0091] In the present application, the flow equalizing plate includes a first flow equalizing plate 32 and a second flow equalizing plate 33, and the first flow equalizing plate 32 and the second flow splitter plate are arranged at intervals, wherein the first flow splitter plate is arranged between the second flow equalizing plate 33 and the distributor air inlet 311, so that the airflow entering the air volume distributor 3 from the distributor air inlet 311 first flows through the first flow splitter plate, and then flows through the second flow splitter plate, so that the airflow is divided by the two flow equalizing plates.

[0092] The air handling system of the present application has at least two air valves 35 , one air supply pipe 34 is correspondingly provided for one room, and one air supply pipe 34 is correspondingly provided for one air valve 35 .

[0093] In the illustrated embodiment of the present application, there are six rooms, six air supply ducts 34 , and six air valves 35 .

[0094] The air valve 35 includes a first air valve 35, a second air valve 35, a third air valve 35, a fourth air valve 35, a fifth air valve 35 and a sixth air valve 35. The ventilation areas of the first air valve 35, the second air valve 35, the third air valve 35, the fourth air valve 35, the fifth air valve 35 and the sixth air valve 35 when they are fully opened are A1, A2, A3, A4, A5 and A6 respectively.

[0095] The ventilation area and opening angle of the air valve 35 can be changed according to the signal sent by the controller.

[0096] The housing 31 of the air volume distributor 3 of the present application is a cuboid, and the air volume distributor 3 includes a top plate and a bottom plate, and also has a side wall connected between the top plate and the bottom plate. The extension direction of the housing 31 of the air volume distributor 3 between the top plate and the bottom plate is the height direction.

[0097] The height direction is defined as the first direction. A distributor air inlet 311 is provided on the side wall of the air volume distributor 3. The distributor air inlet 311 at least partially extends along the height direction. The width direction of the distributor air inlet 311 is defined as the second direction, and the second direction is perpendicular to the first direction.

[0098] Reference Figure 3 , Figure 4 In some embodiments of the present application, the first flow balancing plate 32 is a curved plate, and a plurality of first flow balancing openings 323 are provided on the first flow balancing plate 32, and the first flow balancing openings 323 extend along the second direction.

[0099] A plurality of rotatable louvers 321 are disposed on the first flow equalizing plate 32 , and the plurality of louvers 321 are arranged along the height direction.

[0100] It should be noted that the multiple louvers 321 on the first flow equalizing plate 32 are connected to an external transmission structure. The external transmission structure includes a transmission rod and a drive motor, and the outer edges of the multiple louvers 321 are simultaneously connected to a transmission rod, the drive motor is connected to the transmission rod, and the transmission rod is driven by the drive motor to drive the louvers 321 to rotate a certain angle.

[0101] The shapes and sizes of the louvers 321 of the first flow equalizing plate 32 of the present application are matched so that the first flow equalizing plate 32 can rotate at the same angle to open the first flow equalizing port 323 with the same ventilation area, so as to facilitate the motor to drive the first flow equalizing port 323 on the first flow equalizing plate 32 to open at the same angle, so that the airflow through the first flow equalizing port 323 can flow more evenly.

[0102] In some embodiments, the louvers 321 of the first flow equalizing plate 32 have the same shape and size.

[0103] It should be noted that the first flow equalizer 32 is a symmetrical structure, having a first symmetry axis extending along the first direction, the louver 321 of the first flow equalizer 32 extends along the second direction, and the first flow equalizer port 323 also extends along the second direction. The turbulent airflow flows from the connecting pipe 7 to the air volume distributor 3, first flowing through the first flow equalizer port 323 on the first flow equalizer 32. Since the first flow equalizer port 323 extends along the second direction, the gas flowing out of the first flow equalizer port 323 is blown out along the second direction, so that the airflow becomes more orderly.

[0104] When the louver 321 rotates, the louver 321 rotates to form a gap, and the first flow equalizing opening 323 is a ventilation gap opened by the louver 321 . The louver 321 rotates at different angles to change the air outlet area of ​​the first flow equalizing opening 323 .

[0105] The louver 321 of the first flow equalizing plate 32 of the present application has at least n adjustment states, namely 0% (fully closed) state, W1% open state, W2% open state, W3% open state...W(n-2)% open state, 100% open (fully open) state.

[0106] When the louver blades 321 are in a 0% (fully closed) state, the first flow equalizing port 323 is closed, and the flow rate of the airflow passing between the louver blades 321 of the first flow equalizing plate 32 is zero.

[0107] When the louvers 321 are in the W1% open state, the flow rate of the airflow passing through the louvers 321 of the first flow equalizing plate 32 accounts for W1% of the flow rate of the airflow in the fully open state.

[0108] When the louvers 321 are in the W2% open state, the flow rate of the airflow passing through the louvers 321 of the first flow equalizing plate 32 accounts for W2% of the flow rate of the airflow in the fully open state.

[0109] When the louvers 321 are in the W3% open state, the flow rate of the airflow passing through the louvers 321 of the first flow equalizing plate 32 accounts for W3% of the flow rate of the airflow in the fully open state. ......

[0111] When the louvers 321 are in the W(n-2)% opening state, the flow rate of the airflow passing through the louvers 321 of the first flow equalizing plate 32 accounts for Wn% of the flow rate of the airflow in the fully opening state.

[0112] When the louvers 321 are in a 100% open state, the flow rate of the airflow passing between the louvers 321 of the first flow equalizing plate 32 accounts for 100% of the flow rate of the airflow in the fully open state.

[0113] In some embodiments, the louver blades 321 of the first flow equalizing plate 32 have five adjustment states, namely, 0% open state, 25% open state, 50% open state, 75% open state and 100% open state.

[0114] Reference Figure 5 , Figure 6 In some embodiments of the present application, the second flow balancing plate 33 is a curved plate, and at least two baffles 331 are provided on the second flow balancing plate 33 , and a second flow balancing port 332 is defined between two adjacent baffles 331 .

[0115] It should be noted that the baffle 331 on the second flow equalizing plate 33 extends along the first direction, i.e., the height direction, and the second flow equalizing port 332 also extends along the first direction, i.e., the height direction, so that the airflow flowing out of the first flow equalizing plate 32 and moving along the second direction flows into the second flow equalizing port 332, and then blows out along the first direction, so that the flow of the airflow is more uniform.

[0116] The blocking piece 331 on the second flow balancing plate 33 is a fixed structure and cannot be rotated or translated, so that the second flow balancing port 332 is also a fixed structure.

[0117] The second current balancing plate 33 has a second current balancing plate symmetry axis extending along the height direction of the housing 31. The blocking pieces 331 on the second current balancing plate 33 are arranged along the second direction.

[0118] The two baffles 331 closest to the symmetry axis of the second current equalizing plate are defined as the first baffle 331, and the baffles 331 on both sides of the first baffle 331 and gradually away from the symmetry axis of the second current equalizing plate are defined as the second baffle 331, the third baffle 331, the fourth baffle 331, the fifth baffle 331...the nth baffle 331.

[0119] It should be noted that the second current equalizing plate 33 has at least two second baffles 331 symmetrical about the symmetry axis of the second current equalizing plate, at least two third baffles 331 symmetrical about the symmetry axis of the second current equalizing plate...at least two nth baffles 331 symmetrical about the symmetry axis of the second current equalizing plate.

[0120] The distance between the two first blocking pieces 331 extending along the second direction is a1.

[0121] The distance between the second baffle 331 and the first baffle 331 extending along the second direction is a2; the distance between the third baffle 331 and the second baffle 331 extending along the second direction is a3; the distance between the fourth baffle 331 and the third baffle 331 extending along the second direction is a4; the distance between the fifth baffle 331 and the fourth baffle 331 extending along the second direction is a5.....the distance between the nth baffle 331 and the (n-1)th baffle 331 extending along the second direction is an, n≥2.

[0122] Among them, a1≤a2≤a3≤a4≤a5......≤an, the farther away from the symmetry axis of the second flow equalizing plate, the greater the distance between two adjacent baffles 331, and the sparser the arrangement of the baffles 331, so that the wind can flow out of the second flow equalizing plate 33 more evenly, so that the airflow on the side of the second flow equalizing plate 33 away from the distributor inlet can flow more orderly, so that the airflow can flow into each air supply pipe 34 more evenly.

[0123] In some embodiments, a2=1.1*a1; a3=1.2*a1; a3=1.3*a1; a4=1.4*a1...an=(1+0.1n)*a1, so that the distance between the baffles 331 becomes larger as they are farther away from the symmetry axis of the second flow equalizing plate, and the distance gradually increases by 0.1a1, so that the area of ​​the airflow passing through the second flow equalizing port 332 away from the symmetry axis of the second flow equalizing plate is larger, thereby reducing the probability of the airflow being affected by the side wall of the air volume distributor 3 and causing flow turbulence.

[0124] The fresh air treatment system 100 includes a controller, which is used to control the operation of various components of the fresh air treatment system 100 so that the components connected to the controller can realize various predetermined functions of the fresh air treatment system 100.

[0125] The controller refers to a device that can generate an operation control signal according to the instruction operation code and the timing signal to instruct the air conditioner to execute the control instruction. For example, in response to receiving a power-on or power-off instruction issued by the user, the controller can perform an operation related to the object selected by the power-on or power-off instruction.

[0126] The embodiment of the present application also provides a hardware structure diagram of a controller, the controller includes a processor, and optionally, also includes a memory and a communication interface connected to the processor. The processor, the memory and the communication interface are connected via a bus.

[0127] The processor may be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller 8, a programmable logic device (PLD), or any combination thereof. The processor may also be any other device having a processing function, such as a circuit, a device, or a software module. The processor may also include multiple CPUs, and the processor may be a single-CPU processor or a multi-CPU processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions).

[0128] The memory may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, and the embodiments of the present application do not impose any restrictions on this. The memory may exist independently or be integrated with the processor. Among them, the memory may contain a computer program code. The processor is used to execute the computer program code stored in the memory, so as to realize the control method of the multi-split air conditioning system provided in the embodiments of the present application.

[0129] The communication interface can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. The communication interface can be a module, circuit, transceiver or any device that can achieve communication.

[0130] The bus may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc.

[0131] Each room is provided with an indoor human sensor 5 for detecting the number of people in the room.

[0132] The controller is connected to the indoor human sensing sensor 5, and the indoor human sensing sensor 5 transmits a signal to the controller, and the controller determines the number of people in each room.

[0133] The controller is connected to the air valve 35 , and the controller sends a signal to open the air valve 35 to a certain ventilation area or close it. The air valve 35 sends a signal to the controller, and the controller determines the opening state of each air valve 35 .

[0134] The indoor human sensor 5 transmits a signal to the controller, and the controller determines the number of people in the room and controls each air valve 35 to open or close according to the number of people.

[0135] Specifically, when the number of people in one of the rooms is 0, there is no need to introduce fresh air into the room, and the controller sends a signal to the air valve 35 on the air supply pipe 34 corresponding to the room to close the air valve 35, so that the fresh air is blocked by the air valve 35 and cannot enter the unoccupied room through the air supply pipe 34, thereby reducing the load of the fan and thus reducing the consumption of electricity.

[0136] The controller is connected to all air valves 35 and is configured as follows:

[0137] According to the signal transmitted by the indoor human sensor 5, it is judged whether there is someone in the room. If there is someone in the room, the air valve 35 corresponding to the room is controlled to be opened; if there is no one in the room, the air valve 35 corresponding to the room is controlled to be closed;

[0138] Based on the ratio β of the ventilation area opened by the air valve 35 to the total ventilation area of ​​the air valve 35, the speed of the first fan 61 is controlled, and the inclination angle of the louver 321 of the first flow equalizing plate 32 is controlled;

[0139] There is a first corresponding relationship between the ratio β and the gear position of the first fan 61 , and there is a second corresponding relationship between the gear position of the first fan 61 and the opening state of the louver 321 of the first flow equalizing plate 32 .

[0140] Specifically, one room corresponds to one air supply pipe 34 , and each air supply pipe 34 is provided with an air valve 35 , which controls the air supply volume of the room.

[0141] In the embodiment shown in the figure of the present application, there are 6 air valves 35. For example, when the first air valve 35 and the second air valve 35 are opened, the ratio β of the ventilation area of ​​the opened air valve 35 to the total ventilation area of ​​all the air valves 35 is (A1+A2) / (A1+A2+A3+A4+A5+A6). The ratio β can reflect the amount of fresh air required. When there are more rooms with people, more air valves 35 need to be opened, and the ratio β increases accordingly.

[0142] It should be noted that the first corresponding relationship is:

[0143] When 0=β, the first fan 61 is in the off state and does not need to provide fresh air volume;

[0144] When β∈(0, β1], the first fan 61 is in the first gear and runs at the first speed;

[0145] When β∈(β1, β2], the first fan 61 is in the second gear and runs at the second speed;

[0146] When β∈(β2, β3], the first fan 61 is in the third gear and runs at the third speed;

[0147] When β∈(β3, 1], the first fan 61 is in the fourth gear and operates at the fourth speed, wherein the first speed ≤ the second speed ≤ the third speed ≤ the fourth speed.

[0148] In some embodiments, β1=25%, β2=50%, β3=75%, and the first corresponding relationship is:

[0149] When 0<β≤25%, the first fan 61 is in the first gear and runs at the first speed;

[0150] When 25%<β≤50%, the first fan 61 is in the second gear and runs at the second speed;

[0151] When 50%<β≤75%, the first fan 61 is in the third gear and runs at the third speed;

[0152] When 75%<β≤100%, the first fan 61 is in the fourth gear and operates at the fourth speed.

[0153] As the value of the ratio β increases, it reflects the increase in the required fresh air volume, so the first fan 61 needs to be adjusted to a higher gear and run at a higher wind speed to increase the air volume and meet the fresh air needs of more rooms.

[0154] It should be noted that the second corresponding relationship is:

[0155] When the first fan 61 is in the off state, the speed is 0, and the first flow equalizing plate 32 is in the 0% (fully closed) open state;

[0156] When the first fan 61 is in the first gear position and runs at the first speed, the first flow equalizing plate 32 is in a 25% open state;

[0157] When the first fan 61 is in the second gear and runs at the second speed, the first flow equalizing plate 32 is in a 50% open state;

[0158] When the first fan 61 is in the third gear and runs at the third speed, the first flow equalizing plate 32 is in a 75% open state;

[0159] When the first fan 61 is in the fourth gear and operates at the fourth speed, the first flow equalizing plate 32 is in a 100% open state.

[0160] Specifically, the adjustment state of the louver blades 321 of the first flow equalizing plate 32 is adjusted according to the operating gear of the fan.

[0161] When the fan is in the first gear, the air volume is the lowest at this time, and the louver 321 of the first flow equalizing plate 32 is in a 25% open state, it can meet the demand for airflow to flow out from the first flow equalizing port 323, and is conducive to a more orderly flow of air, and can reduce the probability of airflow turbulence caused by the excessive flow area of ​​the first flow equalizing port 323.

[0162] When the fan is in the second gear, the air volume is in a medium state, and the louver 321 of the first flow equalizing plate 32 is in a 50% open state, which can meet the demand for airflow to flow out from the first flow equalizing port 323 and facilitate a more orderly airflow.

[0163] When the fan is in the third gear, the air volume is relatively high, and the louver 321 of the first flow equalizing plate 32 is in a 75% open state to meet the demand for airflow out of the first flow equalizing port 323, which is conducive to a more orderly airflow.

[0164] When the fan is in the fourth gear, the air volume is very high, and the louvers 321 of the first flow equalizing plate 32 are in a 100% open state to meet the demand for airflow to flow out from the first flow equalizing port 323 .

[0165] Fig.111 is a first working flow diagram of a controller of a fresh air treatment system 100 provided in an embodiment of the present application. The controller is configured to perform the following steps:

[0166] S101, receiving a signal from an indoor human sensing sensor 5;

[0167] S102, determining whether there is anyone in the room;

[0168] S103, if yes, open the corresponding air valve 35;

[0169] S104, if not, close the corresponding air valve 35;

[0170] S105, calculating the ratio β of the ventilation area of ​​the opened air valve 35 to the total ventilation area of ​​all air valves 35;

[0171] S106, calculating a preset gear position of the first fan 61 according to the ratio β and the first corresponding relationship, and driving the fan to rotate at a speed of the preset gear position;

[0172] S107, calculating the preset opening state of the louver blades 321 of the first flow equalizing plate 32 according to the preset gear position of the first fan 61 and the second corresponding relationship, and driving the louver blades 321 of the first flow equalizing plate 32 to rotate to the preset opening state to change the airflow flow area of ​​the first flow equalizing plate 32;

[0173] S108, according to the signal sent by the indoor human sensing sensor 5;

[0174] S109, determining whether the number of people in the room increases;

[0175] S110, if yes, drive the shutter blades 321 of the first flow equalizing plate 32 to adjust from the current open state to a larger open state;

[0176] S111, driving the fan to adjust the speed from the current gear to a higher gear.

[0177] In the prior art, the distributor outlet of the air volume distributor 3 is connected to an air supply pipe 34, and the other end of the air supply pipe 34 is connected to the indoor space. Since the distances between different rooms and the air volume distributor 3 are different, the lengths of the air supply pipe 34 are different, which results in different resistances along the way for the air flow blown out from the air volume distributor 3. Even if the air volume distributed by the air volume distributor 3 to each air supply pipe 34 is the same, the actual air volume reaching the room is different due to the different resistances, resulting in uneven fresh air output.

[0178] The present application proposes a fresh air treatment system 100 that can provide a uniform air supply volume to each room.

[0179] The fresh air processing system 100 includes a first fan 61 and a second fan 62. The first fan 61 is arranged in the fresh air unit 1, and the second fan 62 is arranged in the connecting pipe 7 between the fresh air unit 1 and the air volume distributor 3. The second fan 62 is used to increase the wind pressure to increase the air volume of the air supply.

[0180] The fresh air treatment system 100 of the present application has m air supply pipes 34, m≥2, the materials and ventilation cross-sectional areas of the air supply pipes 34 are the same, and the m air supply pipes 34 are respectively connected to m rooms.

[0181] In the illustrated embodiment of the present application, there are 6 rooms and 6 air supply ducts 34 .

[0182] The average area of ​​all rooms is X0, and the area of ​​a single room is X, where |X-X0|≤0.5X. The areas of different rooms are similar to reduce the probability of insufficient fresh air volume in larger rooms.

[0183] In some embodiments, when the room area X is larger than the average area X0, and the difference is larger than 0.5X, two air supply ducts 34 may be introduced into a room to supply air, so that the fresh air volume in the room with a larger area is also maintained sufficient.

[0184] The controller is connected to the motor driving the louver blades 321 of the first flow equalizing plate 32 to rotate, so as to send a signal to drive the louver blades 321 of the first flow equalizing plate 32 to rotate, and can receive a feedback signal of the angle of the louver blades 321 of the first flow equalizing plate 32.

[0185] The controller is connected to the first fan 61 and the second fan 62 , and can drive the first fan 61 and the second fan 62 to operate at different gears, and can receive feedback signals of the real-time rotation speeds of the first fan 61 and the second fan 62 .

[0186] The fresh air processing equipment also includes a plurality of pressure difference sensors 4 arranged in a single room and a pressure difference sensor 4 arranged in the air volume distributor 3. The plurality of pressure difference sensors 4 are connected to the controller and transmit the detected pressure difference signals to the controller.

[0187] The controller is also connected to the indoor human sensing sensor 5 and the air valve 35 .

[0188] The present application proposes a fresh air processing system 100 that can determine the amount of fresh air delivered by different air supply ducts 34, so that the amount of fresh air obtained by different rooms can be more even.

[0189] The fresh air processing system 100 according to the present application includes a fresh air unit 1 and an air volume distributor 3. The fresh air unit 1 is connected to the outdoor space through an air inlet pipe 2. The air volume distributor 3 is connected to the fresh air unit 1 so that the airflow flows from the fresh air unit 1 into the air volume distributor 3, and has a housing 31. The distributor air outlet 312 is provided on the housing 31.

[0190] The fresh air treatment system 100 further includes at least two air supply pipes 34 , the inlet ends of the air supply pipes 34 are connected to the distributor air outlet 312 , and the outlet ends of the air supply pipes 34 are in communication with the indoor space.

[0191] The fresh air processing system 100 further includes at least two air valves 35 , which are connected to the air supply pipes 34 in a one-to-one correspondence and are used to control the flow rate of the air flow in the air supply pipes 34 .

[0192] At least one differential pressure sensor 4 is disposed at the outlet end of each air supply pipe 34 to detect the differential pressure value and upload it to the controller. The controller is connected to the differential pressure sensor 4 and the air valve 35.

[0193] The controller is configured as follows: detecting the pressure difference value at the outlet end of the air supply pipe 34 through the pressure difference sensor 4, determining the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values, and calculating whether the difference A between Pmax and Pmin reaches the preset difference value A0; if A reaches the preset difference value A0, driving the air valve P to open at the second opening, wherein the air valve P is arranged on the air supply pipe 34 where the pressure difference sensor 4 that detects the maximum pressure difference value Pmax is located; when detecting the pressure difference value Pmax, the opening degree of the air valve P is the first opening degree, and the second opening degree is greater than the first opening degree.

[0194] It should be noted that when the pressure difference sensor 4 detects the pressure difference value at the outlet of different air supply pipes 34, the pressure difference value reflects the resistance of different air supply pipes 34. When the difference A between Pmax and Pmin reaches the preset difference A0, it means that the resistance of different air supply pipes 34 is greatly different, and the air volume of different air supply pipes 34 is also greatly different. The fresh air volume in the room where the maximum pressure difference value Pmax is detected is small, and the resistance of the air supply pipe 34 in the room is large. In order to reduce the resistance of the air supply pipe 34 in the room, the controller drives the opening of the air valve P corresponding to the room to increase to the second opening, and the ventilation area of ​​the air valve P is increased, so that the fresh air can flow more smoothly at the air valve P, so that the fresh air can enter the room more smoothly, which is conducive to reducing the pressure difference at the outlet of the air supply pipe 34 in the room, and can also increase the fresh air volume in the room, so that the fresh air volume in each room is more uniform.

[0195] Compared with the prior art, the fresh air treatment system 100 of the present application sets a pressure difference sensor 4 at the outlet end of the air supply duct 34, and uses the pressure difference value detected by the pressure difference sensor 4 to feedback the resistance of the air supply duct 34 and the fresh air volume of the room. When the pressure difference is larger, the resistance of the air supply duct 34 is larger, and the corresponding fresh air volume in the room is smaller. In order to make the fresh air volume of the room more evenly distributed, the controller increases the opening of the air valve P of the room corresponding to Pmax to the second opening to increase the ventilation area of ​​the air valve 35, so that more fresh air flows into the air supply duct 34 from the air valve P, so that the fresh air volume of the room corresponding to Pmax is increased, thereby achieving the effect of evenly distributing the fresh air volume in each room. Compared with the prior art, the fresh air treatment system 100 of the present application has different air valve 35 adjustment strategies for different rooms, which is a significant improvement compared with the prior art method of adjusting the fresh air volume of all rooms by changing the speed of the fan.

[0196] In some embodiments of the present application, the controller is configured as follows: if A≤A0, all air valves 35 are opened at a first opening; the preset difference A0 is the maximum pressure difference value of the pressure difference between the two rooms when the fresh air volume difference between the two rooms is within a preset range.

[0197] It should be noted that if A≤A0, it means that the fresh air volume in each room is not much different, and there is no need to change the opening of the air valve 35. Maintaining the current opening can make the fresh air volume in different rooms fluctuate within a preset range.

[0198] In some embodiments of the present application, the controller is configured to: when receiving the first signal, drive the air valve 35 to open with its respective preset initial opening; and then detect the pressure difference value at the outlet end of the air supply pipe 34 through the pressure difference sensor 4.

[0199] It should be noted that the first signal is a start-up signal, and the air valve 35 is opened at an initial opening and maintained for a period of time. During this process, when the controller receives the first signal, the first fan 61 rotates to deliver fresh air to the room.

[0200] In some embodiments of the present application, the controller is configured to:

[0201] If A reaches the preset difference A0, the air valve P is driven to open at the second opening, and then the pressure difference value at the outlet end of the air supply pipe 34 is detected by the pressure difference sensor 4, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are judged, and the difference A between Pmax and Pmin is calculated, until it is calculated that the difference A between Pmax and Pmin cannot reach the preset difference A0, then the pressure difference value at the outlet end of the air supply pipe 34 is stopped.

[0202] It should be noted that when A reaches the preset difference A0, it means that the difference in fresh air volume in different rooms is relatively large. After increasing the opening of the air valve P, check again whether A cannot reach A0. If it can, it means that the increased opening of the air valve P still cannot meet the fresh air volume demand of the room and needs to be increased again. After increasing the opening of the air valve P again, check again whether A cannot reach A0, until it can be detected that A≤A0, indicating that the opening of the air valve P can meet the fresh air volume demand of the room at this time, and keep the opening of the air valve P unchanged at this time.

[0203] In some embodiments of the present application, there is a fixed difference between the first opening and the second opening, and the fixed difference is no more than 10°. Each time the air valve P is adjusted, the fixed difference is increased until the controller determines that A≤A0 and no longer increases the fixed difference.

[0204] In some embodiments, the fixed difference is 5°.

[0205] Fig.12 1 is a second working flow diagram of the controller of the fresh air treatment system 100 provided in an embodiment of the present application. The controller is configured to perform the following steps:

[0206] S201, when receiving the first signal, the air valves 35 are opened at their respective preset initial openings;

[0207] It should be noted that the first signal is a power-on signal.

[0208] S202, receiving signals from all pressure difference sensors 4, and determining a maximum pressure difference value Pmax and a minimum pressure difference value Pmin among all pressure difference values;

[0209] S203, at this time, the opening degree of the air valve P is the first opening degree, and the difference A is calculated, A=Pmax-Pmin;

[0210] S204, determining the magnitude relationship between A and a preset difference value A0;

[0211] If A≤A0, it is determined that the pressure difference values ​​in all rooms are not large at this time, and all air valves 35 maintain the opening before step S202, which can meet the fresh air demand of each room;

[0212] If A>A0, proceed to S206;

[0213] S205, determine the room corresponding to the maximum pressure difference value Pmax, and then determine the air valve P corresponding to the air supply duct 34 of the room, and send a signal to drive the air valve P to increase its opening, so that the air valve P opens at the second opening to increase the fresh air volume in the room; perform S202 until it is determined that A≤A0, and maintain the opening of the air valve 35 at this time.

[0214] It should be noted that, in some embodiments, the opening of the air valve P increases by 5° each time.

[0215] The present application proposes a fresh air treatment system 100 that can evenly distribute the fresh air volume in each room and can prompt the air supply duct 34 to be blocked.

[0216] A fresh air processing system 100 according to the present application includes a fresh air unit 1 and an air volume distributor 3. The fresh air unit 1 is connected to the outdoor space through an air inlet pipe 2. The air volume distributor 3 is connected to the fresh air unit 1 so that the air flows from the fresh air unit 1 into the air volume distributor 3, and has a housing 31. The distributor air outlet 312 is arranged on the housing 31.

[0217] The fresh air treatment system 100 includes at least two air supply pipes 34 , the inlet ends of the air supply pipes 34 are connected to the distributor air outlet 312 , and the outlet ends of the air supply pipes 34 are in communication with the indoor space.

[0218] The fresh air processing system 100 includes at least two air valves 35 , which are connected to the air supply pipes 34 in a one-to-one correspondence and are used to control the flow rate of the air flow in the air supply pipes 34 .

[0219] The fresh air processing system 100 includes a pressure difference sensor 4, and at least one pressure difference sensor 4 is provided on the outlet end of each air supply pipe 34;

[0220] The fresh air processing system 100 includes a controller connected to the pressure difference sensor 4 and the air valve 35 .

[0221] The controller is configured to: detect the pressure difference value at the outlet end of the air supply pipe 34 through the pressure difference sensor 4, determine the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values, calculate whether the difference value A between Pmax and Pmin reaches the preset difference value A0, and whether Pmin reaches the preset difference value B;

[0222] If so, it is determined that the pressure difference of different air supply pipes 34 is large, and the minimum pressure difference value does not meet the normal air supply requirements, and the air valve P is driven to open at the second opening. The air valve P is arranged on the air supply pipe 34 where the pressure difference sensor 4 that detects the maximum pressure difference value Pmax is located; when the pressure difference value Pmax is detected, the opening of the air valve P is the first opening, and the second opening is greater than the first opening.

[0223] It should be noted that when A reaches the preset difference A0, it means that the difference in fresh air volume in different rooms is relatively large. After increasing the opening of the air valve P, check again whether A cannot reach A0. If it can, it means that the increased opening of the air valve P still cannot meet the fresh air volume demand of the room, and it needs to be increased again. After increasing the opening of the air valve P again, check again whether A cannot reach A0, until it can be detected that A≤A0, indicating that the opening of the air valve P can meet the fresh air volume demand of the room at this time, and keep the opening of the air valve P unchanged at this time.

[0224] The controller of the present application not only determines whether the difference A between Pmax and Pmin reaches the preset difference A0, but also determines whether Pmin reaches the preset difference B. When Pmin reaches the preset difference B, it means that the fresh air volume of the room corresponding to Pmin is at a normal fluctuation level and there is no need to adjust the fresh air volume of the room. If Pmin reaches the preset difference B, it means that Pmin is larger, the fresh air volume of the corresponding room is larger, and the fresh air volume of the room corresponding to Pmax is smaller, and the difference in fresh air volume between different rooms is larger.

[0225] First, adjust the fresh air volume of the room with Pmax, increase the opening of the air valve P to the second opening, so that the fresh air volume of the room corresponding to Pmax increases, thereby gradually narrowing the difference in fresh air volume between different rooms.

[0226] The controller is configured as follows: when the opening of the air valve P reaches the maximum opening, the air valve q is driven to open at the fourth opening. The air valve q is arranged on the air supply pipe 34 where the pressure difference sensor 4 that detects the minimum pressure difference value Pmin is located; the opening of the air valve q that detects the pressure difference value Pmin is the third opening, and the fourth opening is smaller than the third opening.

[0227] It should be noted that when the opening of the air valve P corresponding to the room with Pmax is increased to the maximum opening, the fresh air volume in the room with Pmax can no longer be increased by increasing the opening of the air valve P. However, at this time, the difference in the fresh air volume between different rooms is still large. It is necessary to reduce the opening of the air valve q in the room corresponding to Pmin to reduce the fresh air volume in the room corresponding to Pmin, thereby reducing the difference in fresh air volume between different rooms.

[0228] Compared with the prior art, the fresh air treatment system 100 of the present application can achieve uniform distribution of fresh air volume in different rooms. The controller detects the pressure difference value at the outlet end of different air supply pipes 34 through the pressure difference sensor 4, and calculates whether the difference A between Pmax and Pmin reaches the preset difference A0, and whether Pmin reaches the preset difference B; when A reaches the preset difference A0, or Pmin reaches the preset difference B, the opening of the air valve P of the room corresponding to Pmax is increased to increase the fresh air in the room corresponding to Pmax, until the opening of the air valve P increases to the maximum, and then the opening of the air valve 35 of the room corresponding to Pmin is reduced to reduce the fresh air in the room corresponding to Pmin, until A≤A0 and Pmin<B, at which time the fresh air volume of each room is relatively small. The fresh air treatment system 100 of the present application has different air valve 35 adjustment strategies for different rooms, which is a significant improvement compared to the prior art method of adjusting the fresh air volume of all rooms by changing the speed of the fan.

[0229] In some embodiments of the present application, the controller is configured as follows: after receiving the first signal, the air valves 35 are opened with their respective preset initial openings; then the pressure difference value at the outlet end of the air supply pipe 34 is detected by the pressure difference sensor 4, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are determined, and the difference A is calculated, A=Pmax-Pmin; if A>A0, or Pmin≥B, the air valve P is driven to open with a second opening, and the second opening is greater than the initial opening.

[0230] It should be noted that the first signal is a power-on signal. When the controller receives the power-on signal, the first fan 61 rotates to deliver fresh air into the indoor space. After the air valves 35 run for a period of time at their respective preset initial openings, the fresh air volume in different rooms is judged. If the difference in the fresh air volume in different rooms is large, the opening of the air valve 35 is adjusted. If the difference in the fresh air volume in different rooms meets the requirements, the air valve 35 is opened at the initial opening. This process ensures that the air valve 35 will not frequently adjust the opening state due to uneven air supply at the beginning when it is just turned on.

[0231] In some embodiments of the present application, the fresh air treatment system 100 includes a first fan 61 and a second fan 62, and the first fan 61 and the second fan 62 are connected to a controller.

[0232] The controller is configured to: after receiving the first signal, drive the first fan 61 to rotate; when the opening of the air valve q is equal to the minimum opening, if Pmin≥B, drive the second fan 62 to rotate.

[0233] It should be noted that when the opening of the air valve q reaches the minimum opening, it means that the difference in fresh air volume in different rooms cannot be adjusted to a smaller range by adjusting the air valve 35. Driving the second fan 62 to rotate can increase the fresh air volume in the room with the smallest fresh air volume, thereby further narrowing the difference in fresh air volume in different rooms.

[0234] In some embodiments of the present application, the fresh air processing system 100 includes a first fan 61 and a second fan 62, and the first fan 61 and the second fan 62 are connected to a controller;

[0235] The controller is configured to: drive the first fan 61 to rotate after receiving the first signal; when the opening of the air valve q is equal to the minimum opening, if Pmin<B, when the first fan 61 rotates at the maximum speed, drive the second fan 62 to rotate.

[0236] It should be noted that when the opening of the air valve q is equal to the minimum opening, the adjustment of the air valve 35 cannot make the difference in the fresh air volume in different rooms within the set smaller range. At this time, if the first fan 61 rotates at the maximum speed, it can meet the requirement that if Pmin is less than B, it means that the power provided by the first fan 61 is smaller than the power required by the entire room, and if the fresh air volume in the room increases again, the first fan 61 cannot meet the demand, and the second fan 62 needs to be turned on to meet the demand for fresh air volume.

[0237] In some embodiments of the present application, the controller is configured as follows: the second fan 62 rotates at the maximum speed, and the size relationship between A and A0 is determined; if A≤A0, the second fan 62 rotates at the current speed, and the first fan 61 rotates at the current speed; if A>A0, it is determined that the filter of the air supply duct 34 is blocked, and a prompt message is issued to remind the user to replace the filter in the air supply duct corresponding to the air valve P.

[0238] It should be noted that when the second fan 62 rotates at the maximum speed, the first fan 61 has already been at the maximum speed, and the adjustment of the air valve 35 has been tried but still cannot meet the demand for uniform distribution of fresh air volume. If A≤A0, the second fan 62 rotates at the current speed, which means that the demand for fresh air volume can be met at this time, and the difference between different rooms is small, and the fan speed is no longer changed to maintain the status quo; when A>A0, it means that the fresh air volume in different rooms cannot reach the required amount by adjusting the first fan 61, the second fan 62 and the air valve 35, and the fresh air volume of the room corresponding to the largest pressure difference value Pmax is insufficient, which means that the air supply pipe 34 is blocked at this time, and the user needs to be reminded to replace the filter.

[0239] In some embodiments of the present application, the controller is configured as follows: when the opening of the air valve q is equal to the minimum opening, if Pmin<B, when the current speed of the first fan 61 is not greater than the maximum speed, then the first fan 61 is driven to rotate at a preset speed, and the preset speed is greater than the current speed to increase the air supply so that the fresh air volume meets the demand.

[0240] Fig.13 is a third working flow diagram of the controller of the fresh air treatment system 100 provided in an embodiment of the present application. The controller is configured to perform the following steps:

[0241] S301, after receiving the first signal, the air valves 35 are opened at their respective preset initial openings;

[0242] S302, receiving signals from all pressure difference sensors 4, and determining the maximum pressure difference value Pmax and the minimum pressure difference value Pmin in the room;

[0243] S303, calculating the difference A, A=Pmax-Pmin;

[0244] S304, determining the magnitude relationship between A and the preset difference A0, and determining the magnitude relationship between A and the preset difference B; at this time, the air valve P is opened at the first opening, and the air valve q is opened at the third opening;

[0245] If A≤A0, and Pmin<B, it means that the pressure difference between the rooms is not much different, and the Pmin of the room with the smallest pressure difference also meets the requirement of normal pipeline resistance, then all air valves 35 remain in the open state before step S302;

[0246] If A>A0, or Pmin≥B, proceed to S305;

[0247] It should be noted that the preset pressure difference B is the static pressure limit when the resistance in the air supply pipe 34 is the largest. If Pmin<B, it means that the air supply pipe 34 in the room with the smallest pressure difference is not blocked.

[0248] S305, determining the room corresponding to the pressure difference sensor 4 having the maximum pressure difference value Pmax, determining the air valve P corresponding to the air supply pipe 34 of the room, and driving the air valve P to increase the opening degree and open it at the second opening degree;

[0249] It should be noted that, in some embodiments, the opening of the air valve P is increased by 5°.

[0250] S306, determining whether the opening of the air valve P is at the maximum opening;

[0251] If yes, proceed to S307;

[0252] If not, return to S302 until A≤A0 and Pmin<B are satisfied, which means that the pressure difference between the rooms is not much different, and the Pmin of the room with the smallest pressure difference also meets the requirement of normal pipeline resistance, then all air valves 35 remain in the open state of step S302;

[0253] S307, determining the room corresponding to the minimum pressure difference value Pmin, determining the air valve q corresponding to the air supply pipe 34 of the room, driving the air valve q to reduce the opening degree, and opening it with a fourth opening degree, which is smaller than the third opening degree, so as to reduce the air volume of the room;

[0254] It should be noted that, in some embodiments, the opening of the air valve q is reduced by 5° each time.

[0255] S308, determining whether the opening of the air valve q is equal to the minimum opening;

[0256] If yes, proceed to S309;

[0257] If not, return to S302 until A≤A0 and Pmin<B are satisfied, which means that the pressure difference between the rooms is not much different, and the Pmin of the room with the minimum pressure difference also meets the requirement of normal pipeline resistance, then all air valves 35 remain in the open state before step S53;

[0258] S309, judging the magnitude relationship between Pmin and B;

[0259] If Pmin ≥ B, proceed to S310;

[0260] If Pmin<B, it is determined whether the gear position of the first fan 61 is at the maximum gear position, that is, whether the first fan 61 rotates at the maximum speed;

[0261] If yes, proceed to S310;

[0262] If not, the speed of the first fan 61 is increased, and the process returns to S302 until A≤A0 and Pmin<B are satisfied, which means that the pressure differences between the rooms are not much different, and the Pmin of the room with the minimum pressure difference also meets the requirement of normal pipe resistance, and all the air valves 35 remain in the open state before step S302;

[0263] S310, driving the second fan 62 to rotate at a maximum speed;

[0264] S311, judging the magnitude relationship between A and A0;

[0265] S312, if A≤A0, the second fan 62 rotates at the current speed, the first fan 61 rotates at the current gear speed, and the louver 321 of the first flow equalizing plate 32 is opened at the current opening angle;

[0266] S313, if A>A0, it is determined that the filter of the air supply pipe 34 is clogged, and a prompt message is issued to remind the user to replace the filter in the air supply pipe corresponding to the air valve P.

[0267] Fig.14 4 is a fourth working flow diagram of the controller of the fresh air treatment system 100 provided in an embodiment of the present application. The controller is configured to perform the following steps:

[0268] S401, when receiving the first time signal, driving the first fan 61 to run at the lowest speed, opening all the air valves 35, so that all the air supply pipes 34 are in the air supply state;

[0269] It should be noted that the first fan 61 has at least three gears, namely the first gear, the second gear and the third gear, which correspond to the first speed, the second speed and the third speed respectively, and the first speed is less than the second speed and less than the third speed.

[0270] In some embodiments, the first time signal is eight o'clock in the morning, and the first fan 61 operates at the lowest gear at eight o'clock in the morning to deliver fresh air into the room.

[0271] S402, receiving the signal of the indoor human sensor 5 and determining the number of people in each room;

[0272] S403, calculating the ratio θ of the current total number of people in the room to the preset number of people, obtaining the preset gear position of the first fan 61 according to the ratio θ and the third corresponding relationship, and driving the first fan 61 to operate at the preset gear speed;

[0273] It should be noted that the third corresponding relationship is:

[0274] When θ=0, there is no one in the room, and the first fan 61 stops running;

[0275] When θ∈(0, θ1], the number of people in the room is small, and the first fan 61 runs at the first gear, which can achieve air supply and reduce the waste of electric energy;

[0276] When θ∈(θ1, θ2], the number of people in the room is slightly larger, and the first fan 61 operates at the second gear, which can achieve a larger air supply volume;

[0277] When θ∈(θ2, θ3], there are more people in the room, and the first fan 61 runs at the third gear and the maximum air supply volume.

[0278] Among them, θ1<θ2<θ3, as the number of people in the room increases, the required amount of fresh air also increases, the operating gear of the first fan 61 is increased, and the speed is increased to gradually increase the air supply volume to meet the indoor fresh air demand.

[0279] In some embodiments, θ1=25%, θ2=60%, θ3=100%. The third corresponding relationship is:

[0280] When θ=0, there is no one in the room, and the first fan 61 stops running; when 0<θ<25%, there are fewer people in the room, and the first fan 61 runs at the first gear, which can achieve air supply and reduce the waste of electricity; when 25%≤θ<60%, there are slightly more people in the room, and the first fan 61 runs at the second gear, which can achieve a larger air supply volume; when 60%<θ<100%, there are more people in the room, and the first fan 61 runs at the third gear, running at the maximum air supply volume, so that the first fan 61 can run at different speeds according to the actual number of people in the room, thereby meeting the fresh air volume required by different number of people, so as to reduce the probability of the first fan 61 wasting energy and can meet the fresh air demand when there are more people.

[0281] S404, when receiving the second time signal, receiving the signal of the indoor human sensor 5, the controller again determines the number of people in the room, and determines the room with 0 people;

[0282] S405, driving the air valve 35 corresponding to the room with 0 people to close, and not supplying air to the room with 0 people, so as to reduce the waste of fresh air and make the operation of the first fan 61 more energy-efficient;

[0283] S406. After the first time period, return to S403 to re-judge the change in the number of people in the room, so that the first fan 61 can adjust the rotation speed according to the change in the number of people in the room at any time.

[0284] In some embodiments, the first time period is 10 minutes.

[0285] Fig.15 is a fifth working flow diagram of the controller of the fresh air treatment system 100 provided in an embodiment of the present application. The controller is configured to perform the following steps:

[0286] S501, when receiving the first signal, driving the first fan 61 to rotate, and the air valve 35 to open at the respective preset initial openings;

[0287] It should be noted that the first signal is a power-on signal.

[0288] S502, receiving a signal from the pressure difference sensor 4 disposed in the air volume distributor 3, and determining the relationship between the detection value P0 of the pressure difference sensor 4 and 1,

[0289] If P0≤1, it is judged that the wind field in the air volume distributor 3 is uniform;

[0290] If P0>1, it is determined that the wind field in the air volume distributor 3 is relatively uneven, and S53 is performed;

[0291] S503, sending a signal to drive the motor to increase the inclination angle α of the louver angle of the first current equalizing plate 32;

[0292] It should be noted that the louvers of the first flow equalizing plate 32 extend in the second direction, and the angle between the plane where the louver blades 321 of the first flow equalizing plate 32 are approximately located and the height direction of the shell 31 is the inclination angle α. When the inclination angle α is increased, the ventilation area of ​​the first flow equalizing plate 32 is increased, so that the flow area of ​​the airflow passing through the first flow equalizing plate 32 is increased, so that the flow of the airflow is more orderly, so that the wind field in the air volume distributor 3 is more uniform.

[0293] S504, return to S502, until it is determined that P0≤1, it is determined that the wind field of the air volume distributor 3 is uniform, and the inclination angle α of the louver 321 of the first flow equalizing plate 32 is maintained unchanged.

[0294] The fifth working flow diagram of the controller of the fresh air treatment system 100 of the present application has at least the following positive effects:

[0295] The fresh air processing system 100 includes a fresh air unit 1 and an air volume distributor 3. The air volume distributor 3 is connected to the indoor space through an air supply pipe 34. A first flow equalizing plate 32 and a second flow equalizing plate 33 are provided in the air volume distributor 3. The first flow equalizing plate 32 is provided with a louver 321 connected to a driving motor. The louver 321 rotates to change the inclination angle α. A pressure difference sensor 4 is provided inside the air volume sensor. The relationship between the detection value P0 and 1 of the pressure difference sensor 4 inside the air volume sensor is judged to adjust the inclination angle α, thereby adjusting whether the wind field in the air volume distributor 3 is uniform, so as to make the flow equalization effect of the first flow equalizing plate 32 better, so that the airflow flows more evenly after passing through the air volume distributor 3.

[0296] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fresh air treatment system, characterized in that: include: A fresh air unit connected to the outdoor space through an air inlet pipe; An air volume distributor, which is in communication with the fresh air unit so that air flows from the fresh air unit into the air volume distributor, and has a shell; a distributor air outlet, which is arranged on the housing; At least two air supply pipes, whose inlet ends are connected to the air outlet of the distributor and whose outlet ends are connected to the indoor space; At least two air valves, each of which is connected to the air supply pipe in a one-to-one correspondence, and is used to control the flow rate of the air flow in the air supply pipe; A pressure differential sensor, at least one of which is disposed on the outlet end of each of the air supply pipes; A controller connected to the pressure difference sensor and the air valve; the controller is configured as follows: The pressure difference sensor is used to detect the pressure difference at the outlet of the air supply pipe, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are determined, and the difference value A between Pmax and Pmin is calculated; If A reaches the preset difference value A0, the air valve P is driven to open at a second opening, wherein the air valve P is arranged on the air supply pipe where the pressure difference sensor that detects the maximum pressure difference value Pmax is located; When the pressure difference value Pmax is detected, the opening degree of the air valve P is a first opening degree, and the second opening degree is greater than the first opening degree.

2. The fresh air treatment system according to claim 1, characterized in that: The controller is configured such that: if A≤A0, all air valves are opened at a first opening degree; The preset difference value A0 is the maximum pressure difference value of the pressure difference between the two rooms when the difference in fresh air volume between the two rooms is within a preset range.

3. The fresh air treatment system according to claim 1, characterized in that: The controller is configured to: When receiving the first signal, the air valves are driven to open at their respective preset initial openings; The pressure difference value at the outlet end of the air supply pipe is then detected by the pressure difference sensor.

4. The fresh air treatment system according to claim 1, characterized in that: The controller is configured to: If A reaches the preset difference A0, the air valve P is driven to open at the second opening, and then the pressure difference value at the outlet end of the air supply pipe is detected by the pressure difference sensor, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are judged, and the difference A between Pmax and Pmin is calculated, until it is calculated that: the difference A between Pmax and Pmin reaches the preset difference A0, then the pressure difference value at the outlet end of the air supply pipe is stopped.

5. A fresh air treatment system, characterized in that: include: A fresh air unit connected to the outdoor space through an air inlet pipe; An air volume distributor, which is in communication with the fresh air unit so that air flows from the fresh air unit into the air volume distributor, and has a shell; a distributor air outlet, which is arranged on the housing; At least two air supply pipes, whose inlet ends are connected to the air outlet of the distributor and whose outlet ends are connected to the indoor space; At least two air valves, each of which is connected to the air supply pipe in a one-to-one correspondence, and is used to control the flow rate of the air flow in the air supply pipe; A pressure differential sensor, at least one of which is disposed on the outlet end of each of the air supply pipes; A controller connected to the pressure difference sensor and the air valve; the controller is configured as follows: Detecting the pressure difference value at the outlet end of the air supply pipe by the pressure difference sensor, determining the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values, determining whether the difference value A between Pmax and Pmin reaches a preset difference value A0, and whether Pmin reaches a preset difference value B; If yes, the air valve P is driven to open at a second opening, and the air valve P is arranged on the air supply pipe where the pressure difference sensor that detects the maximum pressure difference value Pmax is located; When the pressure difference value Pmax is detected, the opening of the air valve P is a first opening, and the second opening is greater than the first opening; When the opening of the air valve P reaches the maximum opening, the air valve q is driven to open at a fourth opening, and the air valve q is arranged on the air supply pipe where the pressure difference sensor that detects the minimum pressure difference value Pmin is located; The opening degree of the air valve q for detecting the pressure difference value Pmin is the third opening degree, and the fourth opening degree is smaller than the third opening degree.

6. The fresh air treatment system according to claim 5, characterized in that: The controller is configured to: after receiving the first signal, the air valves are opened at respective preset initial openings; Then, the pressure difference value at the outlet end of the air supply pipe is detected by the pressure difference sensor, the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values ​​are determined, and the difference value A is calculated, A=Pmax-Pmin; If A>A0, or Pmin≥B, the air valve P is driven to open at a second opening, and the second opening is greater than the initial opening.

7. The fresh air treatment system according to claim 5, characterized in that: The fresh air processing system comprises a first fan and a second fan, wherein the first fan and the second fan are connected to the controller; The controller is configured to: After receiving the first signal, driving the first fan to rotate; When the opening of the air valve q is equal to the minimum opening, if Pmin≥B, the second fan is driven to rotate.

8. The fresh air treatment system according to claim 5, characterized in that: The fresh air processing system comprises a first fan and a second fan, wherein the first fan and the second fan are connected to the controller; The controller is configured to: After receiving the first signal, driving the first fan to rotate; When the opening of the air valve q is equal to the minimum opening, if Pmin<B, When the first fan rotates at a maximum speed, the second fan is driven to rotate.

9. The fresh air treatment system according to claim 7 or 8, characterized in that: The controller is configured to: the second fan rotates at a maximum speed, and determines the magnitude relationship between A and A0; If A≤A0, the second fan rotates at the current speed and the first fan rotates at the current speed; if A<A0, it is determined that the air supply duct filter is blocked, and a prompt message is issued to remind the user to replace the filter in the air supply duct corresponding to the air valve P.

10. The fresh air treatment system according to claim 8, characterized in that: The controller is configured to: When the opening of the air valve q is equal to the minimum opening, if Pmin<B, when the current speed of the first fan is not greater than the maximum speed, the first fan is driven to rotate at a preset speed, and the preset speed is greater than the current speed.

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