Fresh air treatment system

Abstract

The application provides a fresh air treatment system. The fresh air treatment system comprises a fresh air handling unit and an air volume distributor. The air volume distributor has a shell. An inlet end of a supply air pipe is connected with an air outlet of the distributor, and an outlet end of the supply air pipe is in communication with an indoor space. An air valve is connected with the supply air pipe one by one, and is used for controlling the flow of air flow in the supply air pipe. At least one differential pressure sensor is arranged on the outlet end of each supply air pipe. A controller is connected with the differential pressure sensor and the air valve. The controller is configured to: detect the differential pressure values of the outlet ends of the supply air pipes through the differential pressure sensor, determine the maximum differential pressure value Pmax and the minimum differential pressure value Pmin in all the differential pressure values, calculate whether the difference A between the Pmax and the Pmin reaches a preset difference A0, and drive the air valve P to open at a second opening degree if the A reaches the preset difference A0, wherein the air valve P is arranged on the supply air pipe where the differential pressure sensor detecting the maximum differential pressure value Pmax is located. The opening degree of the air valve P when the differential pressure value Pmax is detected is a first opening degree, and the second opening degree is greater than the first opening degree.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, and in particular to a fresh air treatment system. BACKGROUND

[0002] With the rapid development of fresh air treatment systems, people have put forward more accurate requirements for adjusting the amount of fresh air.

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

[0004] The fresh air unit is usually provided for multiple rooms to provide fresh air. In order to make the fresh air flow more uniform and orderly, the fresh air usually needs to flow into the air volume distributor for distribution after flowing through the fresh air unit.

[0005] In the prior art, the air volume distributor is connected with a supply air pipe, and the other end of the supply air pipe is connected with the indoor space. Since the distances between different rooms and the air volume distributor are different, the lengths of the supply air pipes are different. Sometimes, the supply air pipe is blocked. Even if the air volume distributor distributes the same amount of air to each supply air pipe, the actual air volume reaching the room is different due to the different resistance of the supply air pipe, resulting in uneven air outflow of the fresh air volume, and the adjustment of the fresh air volume is not flexible enough. Only the speed of the fan can be adjusted, so that the fresh air volume of each room can only be roughly adjusted. SUMMARY

[0006] The present application at least partially solves one of the problems in the related art.

[0007] Therefore, the present application aims to provide a fresh air treatment system.

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

[0009] a fresh air unit, which communicates with an outdoor space through an air inlet pipe;

[0010] an air volume distributor, which communicates with the fresh air unit to make the airflow flow from the fresh air unit to the air volume distributor, and has a shell;

[0011] a distributor air outlet, which is provided on the shell;

[0012] at least two supply air pipes, the inlet end of which is connected with the distributor air outlet, and the outlet end of which communicates with the indoor space;

[0013] At least two air valves, the air valves are connected with the air supply pipes one by one, and are used for controlling the flow of air in the air supply pipes;

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

[0015] A controller connected with the differential pressure sensors and the air valves; the controller is configured to:

[0016] Detecting the differential pressure values of the outlet ends of the air supply pipes by the differential pressure sensors, determining the maximum differential pressure value Pmax and the minimum differential pressure value Pmin in all the differential pressure values, and calculating whether the difference A between Pmax and Pmin reaches a preset difference A0;

[0017] If A reaches the preset difference A0, driving the air valve P to open at a second opening degree, wherein 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;

[0018] The opening degree of the air valve P when detecting the differential pressure value Pmax 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 to: if A≤A0, all the air valves open at the first opening degree;

[0020] The preset difference A0 is the maximum differential pressure value of the two rooms when the fresh air quantity difference of 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, driving the air valves to open at respective preset initial opening degrees;

[0023] And then detecting the differential pressure values of the outlet ends of the air supply pipes by the differential pressure sensors.

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

[0025] If A reaches the preset difference A0, driving the air valve P to open at a second opening degree, and then detecting the differential pressure values of the outlet ends of the air supply pipes by the differential pressure sensors, determining the maximum differential pressure value Pmax and the minimum differential pressure value Pmin in all the differential pressure values, and calculating the difference A between Pmax and Pmin, until the difference A between Pmax and Pmin reaches the preset difference A0, stopping detecting the differential pressure values of the outlet ends of the air supply pipes.

[0026] In some embodiments of the present application, the fixed difference between the first opening degree and the second opening degree is not greater than 10°.

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

[0028] an air volume distributor connected to the fresh air unit to allow air flow from the fresh air unit to the air volume distributor, having a housing;

[0029] an air outlet provided on the housing;

[0030] at least two air supply pipes, the inlet ends of which are connected to the air outlet, and the outlet ends of which are connected to indoor spaces;

[0031] at least two air valves, each of which is connected to one of the air supply pipes to control the air flow in the air supply pipe;

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

[0033] a controller connected to the differential pressure sensors and the air valves; the controller is configured to:

[0034] detect the differential pressure values of the outlet ends of the air supply pipes by the differential pressure sensors, determine the maximum differential pressure value Pmax and the minimum differential pressure value Pmin among all the differential pressure values, calculate whether the difference A between Pmax and Pmin reaches a preset difference A0, and whether Pmin reaches a preset difference B;

[0035] if yes, it is determined that the differential pressure of different air supply pipes is large, and the minimum differential pressure value does not meet the demand of normal air supply, and the air valve P is driven to open at a second opening degree, the air valve P being provided on the air supply pipe where the differential pressure sensor detecting the maximum differential pressure value Pmax is located;

[0036] the opening degree of the air valve P when detecting the differential pressure value Pmax is a first opening degree, and the second opening degree is greater than the first opening degree;

[0037] when the opening degree of the air valve P reaches a maximum opening degree, the air valve q is driven to open at a fourth opening degree, the air valve q being provided on the air supply pipe where the differential pressure sensor detecting the minimum differential pressure value Pmin is located;

[0038] the opening degree of the air valve q when detecting the differential pressure value Pmin is a third opening degree, and the fourth opening degree is less than the third opening degree.

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

[0040] then the differential pressure values of the outlet ends of the air supply pipes are detected by the differential pressure sensors, the maximum differential pressure value Pmax and the minimum differential pressure value Pmin among all the differential pressure values are determined, and the difference A is calculated, A=Pmax-Pmin;

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

[0042] In some embodiments of the present application, the fresh air treatment system comprises a first fan and a second fan, which are connected to the controller.

[0043] The controller is configured to:

[0044] After receiving the first signal, the first fan is driven to rotate.

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

[0046] In some embodiments of the present application, the fresh air treatment system comprises a first fan and a second fan, which are connected to the controller.

[0047] The controller is configured to:

[0048] After receiving the first signal, the first fan is driven to rotate.

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

[0050] When the first fan rotates at the maximum rotating 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 rotating speed, and the relationship between A and A0 is determined.

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

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

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

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

[0057] The application provides a fresh air treatment system. The fresh air treatment system comprises a fresh air handling unit and a fresh air volume distributor. The fresh air volume distributor has a shell, an inlet end of a supply air pipe is connected with an air outlet of the distributor, an outlet end of the supply air pipe is in communication with an indoor space, an air valve is connected with the supply air pipe one by one for controlling the flow of air in the supply air pipe, at least one differential pressure sensor is arranged on the outlet end of each supply air pipe, and a controller is connected with the differential pressure sensor and the air valve. The controller is configured to detect the differential pressure values of the outlet ends of the supply air pipes through the differential pressure sensor, determine the maximum differential pressure value Pmax and the minimum differential pressure value Pmin in all the differential pressure values, calculate whether the difference A between Pmax and Pmin reaches a preset difference value A0, drive the air valve P to open at a second opening degree if A reaches the preset difference value A0, wherein the air valve P is arranged on the supply air pipe where the differential pressure sensor detecting the maximum differential pressure value Pmax is arranged, the opening degree of the air valve P when detecting the differential pressure value Pmax is a first opening degree, and the second opening degree is greater than the first opening degree. When the differential pressure is greater, the resistance of the supply air pipe is greater, and the fresh air volume 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 degree of the air valve P of the room corresponding to Pmax to the second opening degree, so as to increase the ventilation area of the air valve, so that more fresh air flows into the supply air pipe from the air valve P, so as to increase the fresh air volume of the room corresponding to Pmax, thereby achieving the effect of evenly distributing the fresh air volume in each room. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

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

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

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

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

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

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

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

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

[0067] Figure 9 is a partial enlarged view of the fresh air handling system according to the embodiment of the present application;

[0068] Figure 10 is a connection diagram of the controller and partial components of the fresh air handling system according to the embodiment of the present application;

[0069] Figure 11 is a flow chart of a first work flow of the fresh air handling system according to the embodiment of the present application;

[0070] Figure 12 is a flow chart of a second work flow of the fresh air handling system according to the embodiment of the present application;

[0071] Figure 13 is a flow chart of a third work flow of the fresh air handling system according to the embodiment of the present application;

[0072] Figure 14 is a flow chart of a fourth work flow of the fresh air handling system according to the embodiment of the present application;

[0073] Figure 15 is a flow chart of a fifth work flow of the fresh air handling system according to the embodiment of the present application;

[0074] In the above figures:

[0075] 100, fresh air handling system 100; 1, fresh air handling unit; 2, air inlet pipe; 3, air volume distributor; 31, housing; 311, distributor air inlet; 312, distributor air outlet; 32, first flow-equalizing plate; 321, louver blade; 323, first flow-equalizing port; 33, second flow-equalizing plate; 331, baffle; 332, second flow-equalizing port; 34, air outlet pipe; 35, air valve; 4, differential pressure sensor; 5, indoor human sensor; 61, first air fan; 62, second air fan; 7, connecting pipe. DETAILED DESCRIPTION

[0076] The present application will now be described in detail by way of example with reference to the drawings. It should be understood that elements, structures and features in one embodiment can be beneficially incorporated in other embodiments without further recitation.

[0077] In the description of the present application, it is to be understood by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

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

[0079] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0080] In the following, the present application will be described with reference to the accompanying drawings. Figures 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's requirements for the air quality of indoor office or living environment are also getting higher and higher.

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

[0083] When the air volume transported by each branch pipeline is not uniform, it will cause the amount of fresh air introduced into each room to be uneven.

[0084] In the prior art, the problem of uneven distribution of air volume is usually solved by adding plug-in valves or air volume regulating valves to adjust the valves. A plurality of valve plates or flow guide plates are arranged in the air volume regulating valve to make the valve plates rotate under the thrust of the airflow to change the amount of delivered gas. These air volume regulating devices can only achieve uniform distribution of air volume by adding special structures, which requires redesigning the air volume regulating valve, resulting in high production and assembly costs of the air volume regulating valve, and the air volume regulating effect is general.

[0085] In order to make the air volume distributor 3 distribute the air volume more evenly, the present application proposes a fresh air handling system 100, which comprises a fresh air unit 1 and an air volume distributor 3, and the air volume distributor 3 is provided with a first flow uniforming plate 32 and a second flow uniforming plate 33 capable of uniforming airflow, so that the fresh air distribution of each room is more uniform.

[0086] Reference Figure 1 The fresh air handling system 100 comprises 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 comprises an air inlet pipe 2 connected to an indoor space and an outdoor space. The airflow 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 screen. The heat exchanger can change the temperature and humidity of the fresh air, so that the temperature and humidity of the indoor environment are not greatly affected when the fresh air is sent into the indoor space, and the comfort of the user is increased. The fan provides the power for the airflow to enter the fresh air unit 1 from the outdoor space. The filter screen 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 by a connecting pipe 7. The fresh air treated 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, and comprises a shell 31 and a flow uniforming plate. 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] The fresh air enters the air volume distributor 3 from the connecting pipe 7, and then flows through the first flow uniforming plate 32, the second flow uniforming plate 33, the air valve 35 and the air supply pipe 34 before flowing into the indoor space, thereby improving the air quality of the indoor space.

[0091] In the present application, the flow uniformizing plates include a first flow uniformizing plate 32 and a second flow uniformizing plate 33, and the first flow uniformizing plate 32 and the second flow uniformizing plate 33 are arranged in a spaced manner, wherein the first flow uniformizing plate is arranged between the second flow uniformizing plate 33 and the air volume distributor inlet 311, so that the air flow entering the air volume distributor 3 from the air volume distributor inlet 311 first flows through the first flow uniformizing plate and then flows through the second flow uniformizing plate, so that the air flow is guided by the two flow uniformizing plates.

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

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

[0094] The air valves 35 include 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, and 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 fully opened are A1, A2, A3, A4, A5, and A6, respectively.

[0095] The ventilation areas and opening angles of the air valves 35 can be changed according to the signals sent by the controller.

[0096] The shell 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 further has a side wall connected between the top plate and the bottom plate. The extension direction of the shell 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, the air volume distributor inlet 311 is arranged on the side wall of the air volume distributor 3, and the air volume distributor inlet 311 at least partially extends along the height direction. The width direction of the air volume distributor inlet 311 is defined as the second direction, and the second direction is perpendicular to the first direction.

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

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

[0100] It should be noted that the plurality of louvers 321 on the first flow uniformity plate 32 are connected with the outer transmission structure. The outer transmission structure comprises a transmission rod and a driving motor. The outer edges of the plurality of louvers 321 are simultaneously connected to the transmission rod. The driving motor is connected to the transmission rod. The transmission rod is driven by the driving motor to drive the louvers 321 to rotate by a certain angle.

[0101] The shape and size of the louvers 321 of the first flow uniformity plate 32 of the present application are matched to enable the first flow uniformity plate 32 to rotate by the same angle and open the same ventilation area of the first flow uniformity opening 323, so as to facilitate the motor to drive the first flow uniformity opening 323 on the first flow uniformity plate 32 to open by the same angle, so that the airflow flowing through the first flow uniformity opening 323 is more uniform.

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

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

[0104] When the louvers 321 rotate, the louvers 321 rotate to form a gap. The first flow uniformity opening 323 is the ventilation gap opened by the louvers 321. The louvers 321 rotate by different angles to change the ventilation area of the first flow uniformity opening 323.

[0105] The louvers 321 of the first flow uniformity plate 32 of the present application have at least n kinds of adjustment states, which are 0% (fully closed) state, W1% open state, W2% open state, W3% open state, W(n-2)% open state, and 100% open (fully open) state.

[0106] When the louvers 321 are in the 0% (fully closed) state, the first flow uniformity opening 323 is closed, and the airflow passing between the louvers 321 of the first flow uniformity plate 32 has a flow rate of 0.

[0107] When the louvers 321 are in the W1% open state, the airflow passing between the louvers 321 of the first flow uniformity plate 32 accounts for W1% 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 between the louvers 321 of the first flow uniforming 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 between the louvers 321 of the first flow uniforming 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)% open state, the flow rate of the airflow passing between the louvers 321 of the first flow uniforming plate 32 accounts for Wn% of the flow rate of the airflow in the fully open state.

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

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

[0114] Referring to Figure 5 , Figure 6 In some embodiments of the present application, the second flow uniforming plate 33 is a curved plate, and at least two baffles 331 are arranged on the second flow uniforming plate 33, and the second flow uniforming ports 332 are defined between the adjacent two baffles 331.

[0115] It should be noted that the baffles 331 on the second flow uniforming plate 33 extend along the first direction, i.e., the height direction, and the second flow uniforming ports 332 also extend along the first direction, i.e., the height direction, so that the airflow flowing out of the first flow uniforming plate 32 along the second direction flows into the second flow uniforming ports 332 and then blows out along the first direction, so that the airflow flows more uniformly.

[0116] The baffles 331 on the second flow uniforming plate 33 are fixed structures and cannot rotate or translate, so that the second flow uniforming ports 332 are also fixed structures.

[0117] The second flow uniforming plate 33 has a second flow uniforming plate symmetry axis extending along the height direction of the shell 31. The baffles 331 on the second flow uniforming plate 33 are arranged along the second direction.

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

[0119] It should be noted that the second flow equalizing plate 33 has at least two second baffles 331 symmetrical about the second flow equalizing plate symmetry axis, at least two third baffles 331 symmetrical about the second flow equalizing plate symmetry axis, at least two fourth baffles 331 symmetrical about the second flow equalizing plate symmetry axis, at least two fifth baffles 331 symmetrical about the second flow equalizing plate symmetry axis, and at least two n-th baffles 331 symmetrical about the second flow equalizing plate symmetry axis.

[0120] The distance between two first baffles 331 extending in the second direction is a1.

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

[0122] Wherein, a1≤a2≤a3≤a4≤a5......≤an, the farther away from the second flow equalizing plate symmetry axis, the greater the distance between the adjacent two baffles 331, and the more sparse the arrangement of the baffles 331, so that the air flowing out of the second flow equalizing plate 33 is more uniform, so that the airflow on the side of the second flow equalizing plate 33 away from the distributor inlet flows more orderly, thereby making the airflow flow more uniformly into each air supply pipe 34.

[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 farther the distance between the baffles 331 away from the second flow equalizing plate symmetry axis, the greater the distance, and the distance gradually increases by 0.1a1, so that the area of the second flow equalizing plate 332 away from the second flow equalizing plate symmetry axis is larger, thereby reducing the probability that the airflow is affected by the side wall of the air volume distributor 3 and causes flow disorder.

[0124] The fresh air treatment system 100 comprises a controller for controlling the operation of each component of the fresh air treatment system 100, so that the components connected with the controller can realize the predetermined functions of operating the fresh air treatment system 100.

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

[0126] The embodiment of the present application further provides a hardware structure schematic diagram of a controller, which comprises a processor, and optionally further comprises a memory and a communication interface connected with the processor. The processor, the memory and the communication interface are connected through a bus.

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

[0128] The memory can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magneto-optical disk storage (including a compact disk, a laser disk, an optical disk, a digital versatile disk, a Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, and the present application is not limited in this regard. The memory can exist independently or be integrated with the processor. The memory can contain computer program code. The processor is configured to execute the computer program code stored in the memory, thereby implementing the control method of the multi-connection air conditioning system provided by the embodiment 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 capable of communication.

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

[0131] An indoor people sensing sensor 5 is arranged in each room to detect the number of people in the room.

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

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

[0134] The indoor people sensing sensor 5 transmits signals 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, the room does not need to introduce fresh air, and the controller sends signals to the air valve 35 on the corresponding air supply pipe 34 of the room to close the air valve 35, so that the fresh air is blocked by the air valve 35 and cannot enter the room without people through the air supply pipe 34, thereby reducing the load of the fan and reducing the consumption of electric energy.

[0136] The controller is connected with all the air valves 35 and is configured to:

[0137] According to the signals transmitted by the indoor people sensing sensor 5, it is determined whether there are people in the room, if there are people in the room, the corresponding air valve 35 of the room is controlled to open, and if there are no people in the room, the corresponding air valve 35 of the room is controlled to close;

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

[0139] The ratio β is in a first corresponding relationship with the gear of the first fan 61, and the gear of the first fan 61 is in a second corresponding relationship with the opening state of the louver blade 321 of the first flow equalization plate 32.

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

[0141] In the embodiment shown in the application, the air valve 35 has six, 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 air valves 35 is (A1+A2) / (A1+A2+A3+A4+A5+A6). The ratio β can reflect the amount of fresh air needed. When there are more rooms with people, more air valves 35 need to be opened, and the ratio β will also increase accordingly.

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

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

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

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

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

[0147] When β∈(β3, 1], the first fan 61 is in a fourth gear and runs at a 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 a first gear and runs at a first speed;

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

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

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

[0153] With the value of the proportion β increasing, the required fresh air quantity increases, so the first fan 61 needs to be adjusted to a higher gear to run at a higher air speed, thereby increasing the air quantity to meet the fresh air demand of more rooms.

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

[0155] When the first fan 61 is in the shutdown state and the rotating speed is 0, the first flow uniforming plate 32 is in the 0% (full closed) opening state.

[0156] When the first fan 61 is in the first gear and runs at the first rotating speed, the first flow uniforming plate 32 is in the 25% opening state.

[0157] When the first fan 61 is in the second gear and runs at the second rotating speed, the first flow uniforming plate 32 is in the 50% opening state.

[0158] When the first fan 61 is in the third gear and runs at the third rotating speed, the first flow uniforming plate 32 is in the 75% opening state.

[0159] When the first fan 61 is in the fourth gear and runs at the fourth rotating speed, the first flow uniforming plate 32 is in the 100% opening state.

[0160] Specifically, the adjusting state of the louver blade 321 of the first flow uniforming plate 32 is adjusted according to the running gear of the fan.

[0161] When the fan is in the first gear, the air quantity is the lowest, and the louver blade 321 of the first flow uniforming plate 32 is in the 25% opening state, which can meet the demand of the airflow flowing out of the first flow uniforming port 323 and is beneficial to the orderly airflow flow.

[0162] When the fan is in the second gear, the air quantity is in a medium state, and the louver blade 321 of the first flow uniforming plate 32 is in the 50% opening state, which can meet the demand of the airflow flowing out of the first flow uniforming port 323 and is beneficial to the orderly airflow flow.

[0163] When the fan is in the third gear, the air quantity is in a relatively large state, and the louver blade 321 of the first flow uniforming plate 32 is in the 75% opening state, which can meet the demand of the airflow flowing out of the first flow uniforming port 323 and is beneficial to the orderly airflow flow.

[0164] When the fan is in the fourth gear, the air quantity is in a very large state, and the louver blade 321 of the first flow uniforming plate 32 is in the 100% opening state, which can meet the demand of the airflow flowing out of the first flow uniforming port 323.

[0165] Figure 11is a first working flowchart of a controller of a fresh air treatment system 100 provided by an embodiment of the present application, the controller is configured to perform the following steps:

[0166] S101, receiving a signal sent by the indoor human sensing sensor 5;

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

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

[0169] S104, if no, closing the corresponding air valve 35;

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

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

[0172] S107, calculating a preset opening state of the louver blade 321 of the first flow uniformizing plate 32 according to the preset gear of the first air fan 61 combined with a second corresponding relationship, and driving the louver blade 321 of the first flow uniformizing plate 32 to rotate to the preset opening state to change an airflow flow-through area of the first flow uniformizing plate 32;

[0173] S108, receiving a 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, driving the louver blade 321 of the first flow uniformizing plate 32 to adjust from a current opening state to a larger opening state;

[0176] S111, further driving the air fan to adjust from a rotating speed of a current gear to a rotating speed of a larger gear.

[0177] In the prior art, the air volume distributor 3 is connected with the air supply pipe 34, and the other end of the air supply pipe 34 is connected with the indoor space. Since the distances between different rooms and the air volume distributor 3 are different, this will cause the lengths of the air supply pipes 34 to be different, thus causing the airflow blown out from the air volume distributor 3 to be subjected to different along-path resistances. Even if the air volume distributor 3 distributes the same air volume to each air supply pipe 34, the actual air volume reaching the room is different under the action of different resistances, resulting in that the outflow of fresh air is not uniform.

[0178] The present application provides a fresh air treatment system 100 capable of uniformly supplying air to each room.

[0179] The fresh air treatment system 100 comprises 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, and the second fan 62 is used to increase the air pressure so as to increase the air volume of the supply air.

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

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

[0182] The average area of all the rooms is X0, and the area of a single room is X, wherein |X-X0|≤0.5X. The areas of different rooms are not greatly different, so as to reduce the probability of the condition that the fresh air volume of a larger room is insufficient.

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

[0184] The controller is connected with a motor driving the rotation of the louvers 321 of the first flow uniforming plate 32, so as to send a signal to drive the rotation of the louvers 321 of the first flow uniforming plate 32, and the controller can receive a feedback signal of the angle of the louvers 321 of the first flow uniforming plate 32.

[0185] The controller is connected with the first fan 61 and the second fan 62, so as to drive the first fan 61 and the second fan 62 to operate at different gears, and the controller can receive a feedback signal of the real-time rotating speed of the first fan 61 and the second fan 62.

[0186] The fresh air treatment device further comprises a plurality of differential pressure sensors 4 arranged in a single room and a differential pressure sensor 4 arranged in the air volume distributor 3, the plurality of differential pressure sensors 4 are connected with the controller and transmit the detected differential pressure signals to the controller.

[0187] The controller is further connected with the indoor human sensor 5 and the air valve 35.

[0188] The present application provides a fresh air treatment system 100 which can determine the amount of fresh air delivered by different supply air pipes 34, so as to make the fresh air volume obtained by different rooms more uniform.

[0189] The fresh air handling system 100 according to the present application comprises a fresh air handling unit 1 and an air volume distributor 3. The fresh air handling unit 1 is connected to an outdoor space through an air inlet pipe 2. The air volume distributor 3 is connected to the fresh air handling unit 1 to allow air flow from the fresh air handling unit 1 to the air volume distributor 3, and has a housing 31. An air outlet 312 of the distributor is arranged on the housing 31.

[0190] The fresh air handling system 100 further comprises at least two air supply pipes 34, the inlet ends of which are connected to the air outlet 312 of the distributor, and the outlet ends of which are connected to indoor spaces.

[0191] The fresh air handling system 100 further comprises at least two air valves 35, each of which is connected to one of the air supply pipes 34 to control the air flow in the air supply pipe 34.

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

[0193] The controller is configured to detect the differential pressure values of the outlet ends of the air supply pipes 34 through the differential pressure sensor 4, determine the maximum differential pressure value Pmax and the minimum differential pressure value Pmin among all the differential pressure values, calculate whether the difference A between Pmax and Pmin reaches a preset difference A0, and drive the air valve P to open at a second opening degree if A reaches the preset difference A0, wherein the air valve P is arranged on the air supply pipe 34 where the differential pressure sensor 4 detecting the maximum differential pressure value Pmax is located. The opening degree of the air valve P when detecting the differential pressure value Pmax is a first opening degree, and the second opening degree is greater than the first opening degree.

[0194] It should be noted that when the differential pressure sensor 4 detects the differential pressure values of the outlet ends of different air supply pipes 34, the differential pressure values reflect the different resistances of the different air supply pipes 34. When the difference A between Pmax and Pmin reaches the preset difference A0, it indicates that the resistances of the different air supply pipes 34 are quite different, and the air volumes of the different air supply pipes 34 are also quite different. The fresh air volume in the room where the maximum differential pressure value Pmax is detected is smaller, and the resistance of the air supply pipe 34 in this room is larger. In order to reduce the resistance of the air supply pipe 34 in this room, the controller drives the opening degree of the air valve P corresponding to this room to increase to the second opening degree, and the ventilation area of the air valve P increases, so that the fresh air flows more smoothly at the air valve P, thereby allowing the fresh air to flow more smoothly into the indoor space, which is conducive to reducing the differential pressure of the outlet end of the air supply pipe 34 in this room and increasing the fresh air volume in this room, so that the fresh air volumes in all rooms are more uniform.

[0195] Compared with the prior art, the fresh air treatment system 100 of the application sets a pressure difference sensor 4 at the outlet end of the air supply pipe 34, and feeds back the resistance of the air supply pipe 34 and the fresh air volume of the room through the pressure difference value detected by the pressure difference sensor 4. When the pressure difference is larger, the resistance of the air supply pipe 34 is larger, and the fresh air volume in the corresponding room is smaller. In order to make the fresh air volume of the room more evenly distributed, the controller increases the air valve P opening degree corresponding to Pmax to the second opening degree, increases the ventilation area of the air valve 35, and makes more fresh air flow into the air supply pipe 34 from the air valve P, so as to increase the fresh air volume of the room corresponding to Pmax, thereby achieving the effect of evenly distributing the fresh air volume of each room. Compared with the prior art, the fresh air treatment system 100 of the application has different air valve 35 adjustment strategies for different rooms. Compared with the method of changing the speed of the fan to adjust the fresh air volume of all rooms in the prior art, it has obvious progress.

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

[0197] It should be noted that if A≤A0, it means that the fresh air volume of each room is not much different, and the opening degree of the air valve 35 does not need to be changed. The present opening degree can make the fresh air volume of different rooms fluctuate within a preset range.

[0198] In some embodiments of the application, the controller is configured to: when receiving a first signal, drive the air valve 35 to open at a respective preset initial opening degree; and then detect the pressure difference value of 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 power-on signal, and the air valve 35 is opened at the initial opening degree and maintained for a period of time. During this process, when the controller receives the first signal, the first fan 61 rotates to supply fresh air to the room.

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

[0201] If A reaches the preset difference A0, the air valve P is driven to open at a second opening degree, and the pressure difference value of the outlet end of the air supply pipe 34 is detected through the pressure difference sensor 4. The maximum pressure difference value Pmax and the minimum pressure difference value Pmin in all pressure difference values are determined, and the difference A between Pmax and Pmin is calculated. When the difference A between Pmax and Pmin cannot reach the preset difference A0, the detection of the pressure difference value of 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 indicates that the fresh air volume difference of different rooms is large, the opening of the damper P is increased, and then it is detected again whether A cannot reach A0. If A can reach A0, it indicates that the opening of the damper P after being increased still cannot meet the demand of the fresh air volume of the room, and needs to be increased again. After the opening of the damper P is increased again, it is detected again whether A cannot reach A0. Until it is detected that A≤A0, it indicates that the opening of the damper P at this time can meet the demand of the fresh air volume of the room, and the opening of the damper P at this time is kept unchanged.

[0203] In some embodiments of the present application, the fixed difference between the first opening and the second opening is not greater than 10°, and the damper P is increased by the fixed difference each time until the controller judges that A≤A0, and the fixed difference is no longer increased.

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

[0205] Figure 12 FIG. 2 is a second working flowchart of the controller of the fresh air treatment system 100 provided by the embodiments of the present application, and the controller is configured to perform the following steps:

[0206] S201, when the first signal is received, the dampers 35 are opened at respective preset initial openings;

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

[0208] S202, signals of all the differential pressure sensors 4 are received, and the maximum differential pressure value Pmax and the minimum differential pressure value Pmin in all the differential pressure values are judged;

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

[0210] S204, the size relationship between A and the preset difference A0 is judged;

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

[0212] If A>A0, S206 is performed;

[0213] S205, the room corresponding to the maximum differential pressure value Pmax is judged, and then the damper P corresponding to the air supply pipe 34 of the room is judged, a signal is sent to drive the opening of the damper P to be increased, so that the damper P is opened at the second opening, so that the fresh air volume of the room is increased; S202 is performed until it is judged that A≤A0, and the opening of the damper 35 at this time is maintained.

[0214] It should be noted that in some embodiments, the opening of the damper P is increased by 5° each time.

[0215] The present application provides a fresh air processing system 100 capable of uniformly distributing fresh air volume of each room and capable of prompting blockage of the supply air duct 34.

[0216] According to the fresh air processing system 100 of the present application, the fresh air processing system 100 comprises a fresh air handling unit 1 and an air volume distributor 3, the fresh air handling unit 1 is connected with an outdoor space through an air inlet pipe 2; the air volume distributor 3 is connected with the fresh air handling unit 1 to make air flow from the fresh air handling unit 1 to the air volume distributor 3, and has a housing 31. An air outlet 312 of the distributor is arranged on the housing 31.

[0217] The fresh air processing system 100 comprises at least two supply air ducts 34, the inlet end of the supply air duct 34 is connected with the air outlet 312 of the distributor, and the outlet end of the supply air duct 34 is connected with an indoor space.

[0218] The fresh air processing system 100 comprises at least two dampers 35, the damper 35 is connected with the supply air duct 34 one by one to control the flow of air in the supply air duct 34.

[0219] The fresh air processing system 100 comprises a differential pressure sensor 4, and at least one differential pressure sensor 4 is arranged on the outlet end of each supply air duct 34.

[0220] The fresh air processing system 100 comprises a controller connected with the differential pressure sensor 4 and the damper 35.

[0221] The controller is configured to detect the differential pressure values of the outlet ends of the supply air ducts 34 through the differential pressure sensor 4, determine the maximum differential pressure value Pmax and the minimum differential pressure value Pmin among all the differential pressure values, calculate whether the difference A between the Pmax and the Pmin reaches a preset difference A0, and whether the Pmin reaches a preset difference B.

[0222] If yes, it is determined that the differential pressure of different supply air ducts 34 is large, and the minimum differential pressure value does not meet the demand of normal air supply, the damper P is driven to open at a second opening, and the damper P is arranged on the supply air duct 34 where the differential pressure sensor 4 detecting the maximum differential pressure value Pmax is arranged; the opening of the damper P when detecting the differential pressure value Pmax is a 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 indicates that the fresh air volume difference of different rooms is large, and the opening of the damper P is increased, and then A is detected again whether it can reach A0. If it can reach A0, it indicates that the opening of the damper P after increasing still cannot meet the demand of the fresh air volume of the room, and needs to be increased again. After increasing the opening of the damper P again, A is detected again whether it cannot reach A0. Until A≤A0 can be detected, it indicates that the opening of the damper P at this time can meet the demand of the fresh air volume of the room, and the opening of the damper P at this time is kept unchanged.

[0224] The controller of the present application not only judges whether the difference A of Pmax and Pmin reaches the preset difference A0, but also judges whether Pmin reaches the preset difference B. When Pmin reaches the preset difference B, it indicates that the fresh air volume of the room corresponding to Pmin is at a normal fluctuation level, and the fresh air volume of the room does not need to be adjusted. If Pmin reaches the preset difference B, it indicates that Pmin is large, and the fresh air volume of the room corresponding to Pmin is large, while the fresh air volume of the room corresponding to Pmax is small, and the difference of the fresh air volume between different rooms is large.

[0225] First, the fresh air volume of the room of Pmax is adjusted, and the opening of the damper P is increased to the second opening, so that the fresh air volume of the room corresponding to Pmax is increased, thereby gradually reducing the difference of the fresh air volume between different rooms.

[0226] The controller is configured to: when the opening of the damper P reaches the maximum opening, drive the damper q on the air supply pipe 34 where the pressure difference sensor 4 detecting the minimum pressure difference Pmin is located to be opened at a fourth opening; the opening of the damper q detecting the pressure difference 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 damper P corresponding to the room of Pmax is increased to the maximum opening, the fresh air volume in the room of Pmax cannot be increased by increasing the opening of the damper P, but the difference of the fresh air volume between different rooms is still large at this time, so the opening of the damper q corresponding to the room of Pmin needs to be reduced, so that the fresh air volume of the room corresponding to Pmin is reduced, thereby reducing the difference of the fresh air volume between different rooms.

[0228] Compared with the prior art, the fresh air treatment system 100 of the application can realize uniform distribution of fresh air volume of different rooms. The controller detects the pressure difference values of the outlet ends of different air supply pipes 34 through the pressure difference sensor 4, 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 damper P corresponding to Pmax is increased, so that the fresh air of the room corresponding to Pmax is increased, until the opening of the damper P is increased to the maximum, and then the opening of the damper 35 corresponding to Pmin is reduced, so that the fresh air of the room corresponding to Pmin is reduced, until A≤A0 and PminB, at this time, the fresh air volume of each room is relatively small. The fresh air treatment system 100 of the application has different damper 35 adjustment strategies for different rooms. Compared with the prior art method of adjusting the fresh air volume of all rooms by changing the speed of the fan, there is obvious progress.

[0229] In some embodiments of the application, the controller is configured to: after receiving the first signal, the damper 35 is opened at a respective preset initial opening; then the pressure difference values of the outlet ends of the air supply pipes 34 are detected by the pressure difference sensor 4, the maximum pressure difference Pmax and the minimum pressure difference Pmin in all pressure difference values are determined, and the difference A is calculated, A=Pmax-Pmin; if A>A0 or Pmin≥B, the damper P is driven to open at a second opening, which is larger 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 send fresh air into the indoor space. After the damper 35 operates at the respective preset initial opening for a period of time, the fresh air volume of different rooms is judged. If the difference between the fresh air volume of different rooms is large, the opening of the damper 35 is adjusted. If the difference between the fresh air volume of different rooms meets the requirement, the damper 35 is opened at the initial opening. This process can prevent the damper 35 from being frequently adjusted when it is just turned on due to the uneven initial air supply.

[0231] In some embodiments of the 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 the controller.

[0232] The controller is configured to: after receiving the first signal, drive the first fan 61 to rotate; when the opening of the damper 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 degree of the air valve q reaches the minimum opening degree, it means that the fresh air amount difference between different rooms cannot be adjusted to a smaller range by adjusting the air valve 35, and driving the second fan 62 to rotate can increase the fresh air amount of the room with the smallest fresh air amount, further reducing the difference in fresh air amount between different rooms.

[0234] In some embodiments of the present application, the fresh air treatment system 100 comprises a first fan 61 and a second fan 62, which are connected with the controller.

[0235] The controller is configured to drive the first fan 61 to rotate after receiving the first signal; when the opening degree of the air valve q is equal to the minimum opening degree, if Pmin

[0236] It should be noted that when the opening degree of the air valve q is equal to the minimum opening degree, the difference in fresh air amount between different rooms cannot be adjusted to a smaller range by adjusting the air valve 35, and if the first fan 61 rotates at the maximum speed, it can meet the condition that Pmin

[0237] In some embodiments of the present application, the controller is configured to drive the second fan 62 to rotate at the maximum speed, and judge the size relationship between A and A0; 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 judged that the filter screen in the air supply pipe 34 is blocked, and a prompt message is sent to remind the user to replace the filter screen in the air supply pipe 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 also been at the maximum speed, and it has also been tried to adjust the air valve 35 to meet the demand of uniform distribution of fresh air amount. If A≤A0, the second fan 62 rotates at the current speed, which means that the demand for fresh air amount can be met at this time, and the difference between different rooms is small, so the speed of the fan is not changed, and the status quo is maintained; when A>A0, it means that the first fan 61, the second fan 62 and the air valve 35 cannot be adjusted to make the fresh air amount of different rooms reach the required amount, and the fresh air amount of the room corresponding to Pmax with the largest pressure difference is insufficient, which means that the filter screen in the air supply pipe 34 is blocked, and the user needs to be reminded to replace the filter screen.

[0239] In some embodiments of the present application, the controller is configured to: when the opening degree of the air valve q is equal to the minimum opening degree, if Pmin

[0240] Figure 13 is a third working flowchart of the controller of the fresh air processing system 100 provided by the embodiments of the present application, the controller is configured to perform the following steps:

[0241] S301, after receiving the first signal, the air valve 35 is opened at a respective preset initial opening degree;

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

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

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

[0245] If A≤A0 and Pmin

[0246] If A>A0 or Pmin≥B, S305 is performed;

[0247] It should be noted that the preset pressure difference B is the static pressure limit value when the resistance in the air supply pipe 34 is maximum, and if Pmin

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

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

[0250] S306, judging whether the opening degree of the air valve P is the maximum opening degree;

[0251] If yes, S307 is performed;

[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 large and the Pmin of the room with the minimum pressure difference satisfies the requirement of normal duct resistance, and all the air valves 35 remain the opening state before S302;

[0253] S307, judging the room corresponding to the minimum pressure difference Pmin, judging the air valve q corresponding to the air supply pipe 34 of the room, driving the opening degree of the air valve q to decrease and open at a fourth opening degree, the fourth opening degree being 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 degree of the air valve q is reduced by 5° each time.

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

[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 large and the Pmin of the room with the minimum pressure difference satisfies the requirement of normal duct resistance, and all the air valves 35 remain the opening state before S53;

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

[0259] If Pmin≥B, proceed to S310;

[0260] If Pmin<B, judging whether the gear of the first air fan 61 is at the maximum gear, i.e. whether the first air fan 61 rotates at the maximum speed;

[0261] If yes, proceed to S310;

[0262] If not, increase the speed of the first air fan 61 and return to S302 until A≤A0 and Pmin<B are satisfied, which means that the pressure difference between the rooms is not large and the Pmin of the room with the minimum pressure difference satisfies the requirement of normal duct resistance, and all the air valves 35 remain the opening state before S302;

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

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

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

[0266] S313, if A>A0, it is judged that the filter screen of the air supply pipe 34 is blocked, a prompt message is sent to remind the user to replace the filter screen in the air supply pipe corresponding to the air valve P.

[0267] Figure 14 is a fourth working flowchart of a controller of a fresh air treatment system 100 provided by the present application, the controller is configured to execute the following steps:

[0268] S401, when receiving a first time signal, driving the first fan 61 to run at the lowest gear speed, opening all air valves 35, so that all 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, which are first gear, second gear and third gear, corresponding to first speed, second speed and third speed respectively, and the first speed<second speed<third speed.

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

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

[0272] S403, calculating the proportion θ of the current total number of people in the room to the preset number of people, obtaining the preset gear of the first fan 61 according to the proportion θ and the third corresponding relationship, and driving the first fan 61 to run 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 at this time, and the first fan 61 stops running;

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

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

[0277] When θ∈(θ2, θ3], the number of people in the room is large at this time, the first fan 61 runs at the third gear to run at the maximum air supply volume.

[0278] Wherein, θ1<θ2<θ3, as the number of people in the room increases, the required fresh air volume also increases, the running gear of the first fan 61 is increased, the speed is increased, so that the air supply volume is gradually increased to meet the fresh air demand of the room.

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

[0280] When θ=0, no one is in the room, and the first fan 61 stops running; when 0<θ<25%, the number of people in the room is small, the first fan 61 runs at the first gear, which can achieve air supply and reduce the waste of electric energy; when 25%≤θ<60%, the number of people in the room is slightly large, the first fan 61 runs at the second gear, which can achieve a larger air supply; when 60%<θ<100%, the number of people in the room is large, the first fan 61 runs at the third gear, which runs at the maximum air supply, 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 demand of different numbers of people, reducing the probability of wasting energy of the first fan 61, and meeting the fresh air demand when the number of people is large.

[0281] S404, when the second time signal is received, the signal of the indoor people sensing sensor 5 is received, the controller judges the number of people in the room again, and judges that the number of people in the room is 0;

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

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

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

[0285] Figure 15 is the fifth working flowchart of the controller of the fresh air treatment system 100 provided by the embodiments of the present application, and the controller is configured to execute the following steps:

[0286] S501, when receiving the first signal, the first fan 61 is driven to rotate, and the air valve 35 is opened at the respective preset initial opening degree;

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

[0288] S502, receiving the signal of the differential pressure sensor 4 arranged in the air volume distributor 3, and judging the relationship between the detection value P0 of the differential pressure sensor 4 and 1,

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

[0290] If P0>1, it is judged that the air field in the air volume distributor 3 is not uniform, and then S53 is performed;

[0291] S503, signal driving motor to increase the inclination angle a of the louver angle of the first flow 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 blade 321 of the first flow equalizing plate 32 is located and the height direction of the shell 31 is the inclination angle a. When the inclination angle a is increased, the ventilation area of the first flow equalizing plate 32 is increased, thereby increasing the flow area of the airflow passing through the first flow equalizing plate 32, so that the airflow is more orderly, thereby making the wind field in the air volume distributor 3 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 a of the louver blade 321 of the first flow equalizing plate 32 at this time is maintained unchanged.

[0294] The fifth working flow chart 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 treatment system 100 includes a fresh air handling unit 1 and an air volume distributor 3, the air volume distributor 3 is connected with the indoor space through a supply air duct 34, the air volume distributor 3 is provided with a first flow equalizing plate 32 and a second flow equalizing plate 33, the first flow equalizing plate 32 is provided with a louver blade 321 connected with a driving motor, the louver blade 321 rotates to change the inclination angle a, the air volume sensor is provided with a differential pressure sensor 4 inside, the size relationship between the detection value P0 of the differential pressure sensor 4 inside the air volume sensor and 1 is determined, so as to adjust the inclination angle a, thereby adjusting whether the wind field in the air volume distributor 3 is uniform, which can make the flow equalizing effect of the first flow equalizing plate 32 better, so that the airflow passing through the air volume distributor 3 flows more uniformly.

[0296] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A fresh air handling system, characterized by, The application relates to a fresh air handling unit, which is connected with an outdoor space through an air inlet pipe; an air volume distributor, which is connected with the fresh air handling unit so that air flows from the fresh air handling unit into the air volume distributor and has a shell; an air outlet of the distributor, which is arranged on the shell; at least two air supply pipes, the inlet ends of which are connected with the air outlet of the distributor and the outlet ends of which are connected with indoor spaces; at least two air valves, which are connected with the air supply pipes one by one and are used for controlling the air flow in the air supply pipes; at least one pressure difference sensor, which is arranged on the outlet end of each air supply pipe; and a controller, which is connected with the pressure difference sensors and the air valves; the controller is configured to: drive the air valves to open at respective preset initial opening degrees when a first signal is received; detect the pressure difference values of the outlet ends of the air supply pipes through the pressure difference sensors, determine the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values, and calculate the difference A between Pmax and Pmin; wherein a preset difference value A0 is the maximum pressure difference value of the pressure difference between two rooms when the fresh air volume difference between the two rooms is within a preset range; if A is greater than the preset difference value A0, the air valve P arranged on the air supply pipe of the pressure difference sensor detecting the maximum pressure difference value Pmax is driven to open at a second opening degree; the opening degree of the air valve P when the maximum pressure difference value Pmax is detected is the first opening degree, and the second opening degree is greater than the first opening degree. The controller is configured to: if A is greater than the preset difference value A0, the air valve P is driven to open at a second opening degree, and then the pressure difference values of the outlet ends of the air supply pipes are detected through the pressure difference sensors, 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 between Pmax and Pmin is calculated until the difference A between Pmax and Pmin is less than or equal to the preset difference value A0, and the detection of the pressure difference values of the outlet ends of the air supply pipes is stopped. The application relates to a fresh air handling unit, which is connected with an outdoor space through an air inlet pipe; an air volume distributor, which is connected with the fresh air handling unit so that air flows from the fresh air handling unit into the air volume distributor and has a shell; an air outlet of the distributor, which is arranged on the shell; at least two air supply pipes, the inlet ends of which are connected with the air outlet of the distributor and the outlet ends of which are connected with indoor spaces; at least two air valves, which are connected with the air supply pipes one by one and are used for controlling the air flow in the air supply pipes; at least one pressure difference sensor, which is arranged on the outlet end of each air supply pipe; and a controller, which is connected with the pressure difference sensors and the air valves; the controller is configured to: drive the air valves to open at respective preset initial opening degrees when a first signal is received; detect the pressure difference values of the outlet ends of the air supply pipes through the pressure difference sensors, determine the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all the pressure difference values, and calculate the difference A between Pmax and Pmin; wherein a preset difference value A0 is the maximum pressure difference value of the pressure difference between two rooms when the fresh air volume difference between the two rooms is within a preset range; if A is greater than the preset difference value A0, the air valve P arranged on the air supply pipe of the pressure difference sensor detecting the maximum pressure difference value Pmax is driven to open at a second opening degree; the opening degree of the air valve P when the maximum pressure difference value Pmax is detected is the first opening degree, and the second opening degree is greater than the first opening degree. The controller is configured to: if A is greater than the preset difference value A0, the air valve P is driven to open at a second opening degree, and then the pressure difference values of the outlet ends of the air supply pipes are detected through the pressure difference sensors, 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 between Pmax and Pmin is calculated until the difference A between Pmax and Pmin is less than or equal to the preset difference value A0, and the detection of the pressure difference values of the outlet ends of the air supply pipes is stopped. ​ ​ ​ ​ ​ ​ ​ ​ 2. The fresh air handling system of claim 1, wherein, ​ ​ 3. A fresh air handling system, characterized by, ​ ​ ​ ​ ​ ​ ​ ​ ​ The pressure difference sensor detects the pressure difference value of the outlet end of the air supply pipe, judges the maximum pressure difference value Pmax and the minimum pressure difference value Pmin among all pressure difference values, judges whether the difference A between Pmax and Pmin is greater than a preset difference A0, and whether Pmin is greater than or equal to a preset difference B; wherein the preset difference A0 is the maximum pressure difference value of the pressure difference of the two rooms when the fresh air volume difference of the two rooms is within a preset range; If A>A0 or Pmin≥B, the air valve P is driven to open at a second opening degree, and the air valve P is arranged on the air supply pipe where the pressure difference sensor detecting the maximum pressure difference value Pmax is located; The opening degree of the air valve P when detecting the pressure difference value Pmax is a first opening degree, and the second opening degree is greater than the first opening degree; When the opening degree of the air valve P reaches a maximum opening degree, the air valve q is driven to open at a fourth opening degree, and the air valve q is arranged on the air supply pipe where the pressure difference sensor detecting the minimum pressure difference value Pmin is located; The opening degree of the air valve q detecting the pressure difference value Pmin is a third opening degree, and the fourth opening degree is less than the third opening degree.

4. The fresh air handling system of claim 3, wherein, The fresh air treatment system comprises a first fan and a second fan, and the first fan and the second fan are connected with the controller; The controller is configured to: After receiving the first signal, drive the first fan to rotate; When the opening degree of the air valve q is equal to the minimum opening degree, if Pmin≥B, drive the second fan to rotate.

5. The fresh air handling system of claim 3, wherein, The fresh air treatment system comprises a first fan and a second fan, and the first fan and the second fan are connected with the controller; The controller is configured to: After receiving the first signal, drive the first fan to rotate; When the opening degree of the air valve q is equal to the minimum opening degree, if Pmin<B, When the first fan rotates at the maximum speed, drive the second fan to rotate.

6. The fresh air handling system according to claim 4 or 5, characterized in that, The controller is configured to: The second fan rotates at the maximum speed, and the relationship between A and A0 is judged; 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 judged that the filter screen of the air supply pipe is blocked, a prompt message is sent, and the user is reminded to replace the filter screen in the air supply pipe corresponding to the air valve P.

7. The fresh air handling system of claim 5, wherein, The controller is configured to: When the opening degree of the air valve q is equal to the minimum opening degree, 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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