CN114485254B - Uniform heat exchange control method for aircraft equipment - Google Patents

Abstract

The application belongs to the technical field of temperature regulation of airplane equipment, and particularly relates to a uniform heat exchange control method of airplane equipment. Comprising the following steps: step one, obtaining a uniform heat exchange system of a heat exchanger; arranging a plurality of temperature measuring points on the airplane equipment to be subjected to heat exchange, and acquiring the temperature of each temperature measuring point; and step three, determining the switching frequency of a pipeline switching unit of the uniform heat exchange system of the heat exchanger according to the temperature of each temperature measuring point. According to the method for controlling the uniform heat exchange of the airplane equipment, the pipeline switching unit of the uniform heat exchange system of the heat exchanger is used for realizing the switching of two states of the pipeline of the heat exchanger, the forward circulation of a medium is realized in one state, the reverse circulation of the medium is realized in the other state, the frequency of continuous switching of the two states is determined according to the temperature of each temperature measuring point on the airplane equipment to be subjected to heat exchange, and finally the double circulation of the medium of the heat exchanger is realized, so that the problem of nonuniform heat exchange of the heat exchanger is solved, and the heat exchange efficiency of the heat exchanger is improved.

Description

A uniform heat exchange control method for aircraft equipment

Technical field

The present application belongs to the technical field of aircraft equipment temperature adjustment, and particularly relates to a method for uniform heat exchange control of aircraft equipment.

Background technique

A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. Heat exchangers are also indispensable temperature regulation equipment on aircraft. They are used in aircraft environmental control systems, electronic equipment, skins and other equipment. All have applications.

In the existing technology, the medium used to heat or cool aircraft equipment in the heat exchanger generally adopts a single cycle form. This method will cause the problem of uneven heat exchange in the heat exchanger when the heat exchanger works for a long time. , reducing the heat exchange efficiency of the heat exchanger and affecting the effect of temperature regulation of the equipment.

Therefore, it is desirable to have a technical solution to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

Contents of the invention

The purpose of this application is to provide a uniform heat exchange control method for aircraft equipment to solve at least one problem existing in the prior art.

The technical solution of this application is:

A uniform heat exchange control method for aircraft equipment, including:

Step 1. Obtain the uniform heat exchange system of the heat exchanger. The uniform heat exchange system of the heat exchanger includes:

A heat exchanger, the heat exchanger includes a heat exchange tube, the heat exchange tube is provided with a first port and a second port;

A pipeline switching unit, which is used to switch between the first state and the second state, wherein,

In the first state, the first port of the heat exchange tube is connected to the medium inlet pipeline, and the second port of the heat exchange tube is connected to the medium outlet pipeline;

In the second state, the first port of the heat exchange tube is connected to the medium outlet pipeline, and the second port of the heat exchange tube is connected to the medium inlet pipeline;

Step 2: Arrange multiple temperature measurement points on the aircraft equipment to be heat exchanged and obtain the temperature of each temperature measurement point;

Step 3: Determine the switching frequency of the pipeline switching unit of the heat exchanger uniform heat exchange system based on the temperature of each temperature measurement point.

In at least one embodiment of the present application, the pipeline switching unit includes a first pipeline switching unit and a second pipeline switching unit, wherein,

The first pipeline switching unit includes a first three-way valve and a first controller. The first three-way valve is connected to the medium inlet pipeline through a first pipeline, and is connected to the heat exchange pipe through a second pipeline. The first port is connected to the second port of the heat exchange tube through a third pipeline;

By controlling the first three-way valve, the first controller connects the first pipeline to the medium inlet pipeline and connects the second pipeline to the first port of the heat exchange tube in the first state. Connected, in the second state, the first pipeline is connected to the medium inlet pipeline, and the third pipeline is connected to the second port of the heat exchange tube;

The second pipeline switching unit includes a second three-way valve and a second controller. The second three-way valve is connected to the medium outlet pipeline through a fourth pipeline, and is connected to the heat exchange pipe through a fifth pipeline. The first port is connected to the second port of the heat exchange tube through a sixth pipeline;

The second controller controls the second three-way valve to connect the fourth pipeline to the medium outlet pipeline and connect the sixth pipeline to the second port of the heat exchange tube in the first state. Connected, in the second state, the fourth pipeline is connected to the medium outlet pipeline, and the fifth pipeline is connected to the first port of the heat exchange tube.

In at least one embodiment of the present application, in step 2, the aircraft equipment to be heat exchanged includes aircraft skin and cockpit instrument panel.

In at least one embodiment of the present application, in step 2, arranging multiple temperature measurement points on the aircraft equipment to be heat exchanged, and obtaining the temperature of each temperature measurement point includes: dividing the surface of the aircraft equipment to be heat exchanged into multiple Temperature zone, arrange a temperature measurement point in each temperature zone, and obtain the temperature of each temperature measurement point through a thermometer.

In at least one embodiment of the present application, in step 2, arranging multiple temperature measurement points on the aircraft equipment to be heat exchanged, and obtaining the temperature of each temperature measurement point includes: placing a heat exchange tube along the surface of the aircraft equipment to be heat exchanged. Arrange multiple temperature measurement points at equal intervals in the pipeline, and obtain the temperature of each temperature measurement point through a thermometer.

In at least one embodiment of the present application, in step three, determining the switching frequency of the pipeline switching unit of the heat exchanger uniform heat exchange system based on the temperature of each temperature measurement point includes:

Calculate the temperature difference ΔT _i between each temperature measurement point and other temperature measurement points:

ΔT ₁ =|T ₁ -T ₂ |+|T ₁ -T ₃ |+...+|T ₁ -T _n |

ΔT ₂ =|T ₂ -T ₁ |+|T ₂ -T ₃ |+...+|T ₂ -T _n |

ΔT ₃ =|T ₃ -T ₁ |+|T ₃ -T ₂ |+...+|T ₃ -T _n |

...

ΔT _n =|T _n -T ₁ |+|T _n -T ₂ |+...+|T _n -T _n-1 |

Calculate the total difference in temperature ΣΔT _i between each temperature measurement point and other temperature measurement points:

∑ΔT _i =ΔT ₁ +ΔT ₂ +...+ΔT _n

Determine the switching frequency P of the pipeline switching unit of the heat exchanger uniform heat exchange system as:

P＝A∑ΔT _i +C ₁

Among them, T ₁ , T ₂ , T ₃ ...T _n are the temperatures of each temperature measurement point, and A and C ₁ are constants.

In at least one embodiment of the present application, in step three, determining the switching frequency of the pipeline switching unit of the heat exchanger uniform heat exchange system based on the temperature of each temperature measurement point includes:

Calculate the variance D _T of the temperature at each temperature measurement point:

Determine the switching frequency P of the pipeline switching unit of the heat exchanger uniform heat exchange system as:

P＝BD _T +C ₂

Among them, T ₁ , T ₂ , T ₃ ...T _n are the temperatures of each temperature measurement point, is the average value of the temperature at each temperature measurement point, and B and C ₂ are constants.

The invention has at least the following beneficial technical effects:

The application's uniform heat exchange control method for aircraft equipment uses a heat exchanger uniform heat exchange system to switch the heat exchanger pipelines, realizes double circulation of the heat exchanger medium, and reasonably determines the switching frequency of the heat exchanger pipelines. , solves the problem of uneven heat exchange in the heat exchanger and improves the heat exchange efficiency of the heat exchanger.

Description of the drawings

Figure 1 is a flow chart of a uniform heat exchange control method for aircraft equipment according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the embodiments of the present application. In the drawings, the same or similar reference numbers throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outside", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description, and are not indicated or implied. The devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of the present application.

The present application will be further described in detail below in conjunction with Figure 1.

This application provides a uniform heat exchange control method for aircraft equipment, including the following steps:

S001. Obtain the uniform heat exchange system of the heat exchanger. The uniform heat exchange system of the heat exchanger includes:

A heat exchanger, the heat exchanger includes a heat exchange tube, and the heat exchange tube is provided with a first port and a second port;

The pipeline switching unit is used to realize switching between the first state and the second state, wherein,

In the first state, the first port of the heat exchange tube is connected to the medium inlet pipeline, and the second port of the heat exchange tube is connected to the medium outlet pipeline;

In the second state, the first port of the heat exchange tube is connected to the medium outlet pipeline, and the second port of the heat exchange tube is connected to the medium inlet pipeline;

S002. Arrange multiple temperature measurement points on the aircraft equipment to be heat exchanged and obtain the temperature of each temperature measurement point;

S003. Determine the switching frequency of the pipeline switching unit of the heat exchanger uniform heat exchange system based on the temperature of each temperature measurement point.

The aircraft equipment uniform heat exchange control method of the present application realizes switching between the two states of the heat exchanger pipeline through the pipeline switching unit of the heat exchanger uniform heat exchange system. The heat exchange tube of the heat exchanger has two ports. In one state, the first port of the heat exchange tube is connected to the medium inlet pipeline of the heat exchanger, and the second port of the heat exchange tube is connected to the medium of the heat exchanger. The outlet pipeline is connected to realize the positive circulation of the medium. In another state, the first port of the heat exchange tube is connected to the medium outlet pipeline of the heat exchanger, and the second port of the heat exchange tube is connected to the medium of the heat exchanger. The inlet pipeline is connected to realize the reverse circulation of the medium. According to the temperature of each temperature measurement point on the aircraft equipment to be heat exchanged, the frequency of continuous switching between the two states is determined, and ultimately the dual circulation of the heat exchanger medium is realized.

In a preferred embodiment of the present application, the pipeline switching unit in the heat exchanger uniform heat exchange system may include a first pipeline switching unit and a second pipeline switching unit, wherein the first pipeline switching unit includes a first three Through the valve and the first controller, the first three-way valve is connected to the medium inlet pipeline through the first pipeline, connected to the first port of the heat exchange tube through the second pipeline, and connected to the heat exchange tube through the third pipeline. The second port is connected; the first controller controls the first three-way valve, in the first state, to connect the first pipeline to the medium inlet pipeline, and to connect the second pipeline to the first port of the heat exchange tube. , in the second state, the first pipeline is connected to the medium inlet pipeline, and the third pipeline is connected to the second port of the heat exchange tube. The second pipeline switching unit includes a second three-way valve and a second controller. The second three-way valve is connected to the medium outlet pipeline through the fourth pipeline, and is connected to the first port of the heat exchange pipe through the fifth pipeline. The sixth pipe is connected to the second port of the heat exchange pipe; the second controller controls the second three-way valve to connect the fourth pipe to the medium outlet pipe in the first state, and connects the sixth pipe The pipeline is connected to the second port of the heat exchange tube. In the second state, the fourth pipeline is connected to the medium outlet pipeline, and the fifth pipeline is connected to the first port of the heat exchange tube.

In this embodiment, the first three-way valve has valve a, valve b and valve c, and the second three-way valve has valve d, valve e and valve f. In the first state, the first controller opens valve a to connect the first pipeline to the medium inlet pipeline, opens valve b to connect the second pipeline to the first port of the heat exchange tube, and closes valve c to realize the medium The inlet pipeline is connected to the first port of the heat exchange pipe through the first pipeline and the second pipeline; the valve d is opened through the second controller to connect the fourth pipeline to the medium outlet pipeline, and the valve f is opened to connect the sixth pipe The pipeline is connected to the second port of the heat exchange tube, and the valve e is closed to realize that the medium outlet pipeline is connected to the second port of the heat exchange tube through the fourth pipeline and the sixth pipeline. In the second state, the first controller opens valve a to connect the first pipeline to the medium inlet pipeline, opens valve c to connect the third pipeline to the second port of the heat exchange tube, and closes valve b to realize the medium The inlet pipeline is connected to the second port of the heat exchange pipe through the first pipeline and the third pipeline; the valve d is opened through the second controller to connect the fourth pipeline to the medium outlet pipeline, and the valve e is opened to connect the fifth pipe The pipeline is connected to the first port of the heat exchange tube, and the valve f is closed to realize that the medium outlet pipeline is connected to the first port of the heat exchange tube through the fourth pipeline and the fifth pipeline.

The uniform heat exchange control method of aircraft equipment in this application applies the heat exchanger uniform heat exchange system to the aircraft equipment to be heat exchanged, such as aircraft skin and cockpit instrument panel. The heat exchanger can realize heat exchange through gas or liquid media according to the type of aircraft equipment to be exchanged, and according to the heat exchange needs of the aircraft equipment to be heat exchanged, such as high-altitude de-icing needs for aircraft skins and cooling needs for cockpit electronic equipment. , the heat exchange medium can be cooling gas, fuel, etc. In the preferred embodiment of the present application, in step S002, multiple temperature measurement points on the aircraft equipment to be heat exchanged are arranged on the surface of the aircraft equipment to be heat exchanged that is in contact with the heat exchange tubes of the heat exchanger. They can be arranged in a certain manner. Arrange various temperature measurement points. For example, divide the surface of the aircraft equipment to be heat exchanged into multiple temperature zones, arrange a temperature measurement point in each temperature zone, and measure the temperature of each temperature measurement point with a thermometer, or directly place the temperature on the aircraft to be heat exchanged. Multiple temperature measurement points are arranged at equal intervals along the heat exchange tubes on the surface of the equipment, and the temperature of each temperature measurement point is measured with a thermometer.

According to this application's uniform heat exchange control method for aircraft equipment, the switching frequency of the pipeline switching unit of the heat exchanger's uniform heat exchange system has a greater impact on the heat exchange effect of the heat exchanger and needs to be based on the specific type of aircraft equipment to be heat exchanged. Determine the switching frequency of the pipeline switching unit in an appropriate manner.

In one embodiment of the present application, in S003, determining the switching frequency of the pipeline switching unit of the heat exchanger uniform heat exchange system based on the temperature of each temperature measurement point includes:

Calculate the temperature difference ΔT _i between each temperature measurement point and other temperature measurement points:

ΔT ₁ =|T ₁ -T ₂ |+|T ₁ -T ₃ |+...+|T ₁ -T _n |

ΔT ₂ =|T ₂ -T ₁ |+|T ₂ -T ₃ |+...+|T ₂ -T _n |

ΔT ₃ =|T ₃ -T ₁ |+|T ₃ -T ₂ |+...+|T ₃ -T _n |

...

ΔT _n =|T _n -T ₁ |+|T _n -T ₂ |+...+|T _n -T _n-1 |

Calculate the total difference in temperature ΣΔT _i between each temperature measurement point and other temperature measurement points:

∑ΔT _i =ΔT ₁ +ΔT ₂ +...+ΔT _n

Determine the switching frequency P of the pipeline switching unit of the heat exchanger uniform heat exchange system as:

P＝A∑ΔT _i +C ₁

Among them, T ₁ , T ₂ , T ₃ ...T _n are the temperatures of each temperature measurement point, and A and C ₁ are constants.

In another embodiment of the present application, in S003, determining the switching frequency of the pipeline switching unit of the heat exchanger uniform heat exchange system based on the temperature of each temperature measurement point includes:

Calculate the variance D _T of the temperature at each temperature measurement point:

Determine the switching frequency P of the pipeline switching unit of the heat exchanger uniform heat exchange system as:

P＝BD _T +C ₂

Among them, T ₁ , T ₂ , T ₃ ...T _n are the temperatures of each temperature measurement point, is the average value of the temperature at each temperature measurement point, and B and C ₂ are constants.

The aircraft equipment uniform heat exchange control method of this application provides two appropriate ways to determine the switching frequency of the pipeline switching unit of the heat exchanger uniform heat exchange system, respectively, by calculating the temperature difference of each temperature measurement point. The difference and variance of each temperature measurement point can reflect the heat exchange effect of the aircraft equipment to be heat exchanged. Each parameter in the formula can be determined according to the actual situation. In addition, in practical applications, other appropriate methods can be used to determine the switching frequency of the pipeline switching unit of the heat exchanger uniform heat exchange system according to different needs.

The aircraft equipment uniform heat exchange control method of the present application is configured with a heat exchanger uniform heat exchange system, and the heat exchanger pipeline is switched through the pipeline switching unit of the heat exchanger uniform heat exchange system to realize dual use of heat exchanger media. Circular circulation, and the switching frequency of the heat exchanger pipeline is reasonably determined, which solves the problem of uneven heat exchange in the heat exchanger and improves the heat exchange efficiency of the heat exchanger.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. All are covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (6)

1. A method for controlling uniform heat exchange of aircraft equipment, comprising:

step one, obtaining a uniform heat exchange system of a heat exchanger, wherein the uniform heat exchange system of the heat exchanger comprises:

the heat exchanger comprises a heat exchange tube, wherein the heat exchange tube is provided with a first port and a second port;

a pipeline switching unit for realizing the switching between a first state and a second state, wherein,

in a first state, a first port of the heat exchange tube is connected with a medium inlet pipeline, and a second port of the heat exchange tube is connected with a medium outlet pipeline;

in the second state, the first port of the heat exchange tube is connected with a medium outlet pipeline, and the second port of the heat exchange tube is connected with a medium inlet pipeline;

arranging a plurality of temperature measuring points on the airplane equipment to be subjected to heat exchange, and acquiring the temperature of each temperature measuring point;

step three, determining the switching frequency of a pipeline switching unit of the uniform heat exchange system of the heat exchanger according to the temperature of each temperature measuring point;

the determining the switching frequency of the pipeline switching unit of the uniform heat exchange system of the heat exchanger according to the temperature of each temperature measuring point comprises the following steps:

calculating the temperature difference delta T between each temperature measuring point and other temperature measuring points _i ：

ΔT ₁ ＝|T ₁ -T ₂ |+|T ₁ -T ₃ |+...+|T ₁ -T _n |

ΔT ₂ ＝|T ₂ -T ₁ |+|T ₂ -T ₃ |+...+|T ₂ -T _n |

ΔT ₃ ＝|T ₃ -T ₁ |+|T ₃ -T ₂ |+...+|T ₃ -T _n |

...

ΔT _n ＝|T _n -T ₁ |+|T _n -T ₂ |+...+|T _n -T _n-1 |

Calculating the total difference Sigma delta T of the temperatures between each temperature measuring point and other temperature measuring points _i ：

∑ΔT _i ＝ΔT ₁ +ΔT ₂ +...+ΔT _n

The switching frequency P of the pipeline switching unit of the uniform heat exchange system of the heat exchanger is determined to be:

P＝A∑ΔT _i +C ₁

wherein T is ₁ 、T ₂ 、T ₃ ...T _n A, C for the temperature of each temperature measuring point ₁ Is constant.

2. The method for controlling uniform heat exchange of aircraft equipment according to claim 1, wherein the pipeline switching unit comprises a first pipeline switching unit and a second pipeline switching unit, wherein,

the first pipeline switching unit comprises a first three-way valve and a first controller, wherein the first three-way valve is connected with a medium inlet pipeline through a first pipeline, is connected with a first port of the heat exchange pipe through a second pipeline and is connected with a second port of the heat exchange pipe through a third pipeline;

the first controller is used for controlling the first three-way valve, so that the first pipeline is communicated with the medium inlet pipeline in a first state, the second pipeline is communicated with the first port of the heat exchange pipe, the first pipeline is communicated with the medium inlet pipeline in a second state, and the third pipeline is communicated with the second port of the heat exchange pipe;

the second pipeline switching unit comprises a second three-way valve and a second controller, wherein the second three-way valve is connected with a medium outlet pipeline through a fourth pipeline, is connected with a first port of the heat exchange pipe through a fifth pipeline and is connected with a second port of the heat exchange pipe through a sixth pipeline;

the second controller is used for controlling the second three-way valve, so that the fourth pipeline is communicated with the medium outlet pipeline in the first state, the sixth pipeline is communicated with the second port of the heat exchange pipe, the fourth pipeline is communicated with the medium outlet pipeline in the second state, and the fifth pipeline is communicated with the first port of the heat exchange pipe.

3. The method for uniform heat exchange control of an aircraft device according to claim 2, wherein in step two, the aircraft device to be heat exchanged comprises an aircraft skin and a cockpit instrument panel.

4. The method for controlling uniform heat exchange of aircraft equipment according to claim 3, wherein in the second step, a plurality of temperature measuring points are arranged on the aircraft equipment to be subjected to heat exchange, and acquiring the temperature of each temperature measuring point comprises: dividing the surface of the airplane equipment to be subjected to heat exchange into a plurality of temperature areas, arranging a temperature measuring point in each temperature area, and acquiring the temperature of each temperature measuring point through a thermometer.

5. The method for controlling uniform heat exchange of aircraft equipment according to claim 3, wherein in the second step, a plurality of temperature measuring points are arranged on the aircraft equipment to be subjected to heat exchange, and acquiring the temperature of each temperature measuring point comprises: a plurality of temperature measuring points are arranged on the surface of the airplane equipment to be subjected to heat exchange at equal intervals along the pipeline of the heat exchange pipe, and the temperature of each temperature measuring point is obtained through a thermometer.

6. The method for controlling uniform heat exchange of aircraft equipment according to claim 3, wherein in the third step, determining the switching frequency of the pipeline switching unit of the uniform heat exchange system of the heat exchanger according to the temperature of each temperature measuring point comprises:

calculating the variance D of the temperature of each temperature measuring point _T ：

The switching frequency P of the pipeline switching unit of the uniform heat exchange system of the heat exchanger is determined to be:

P＝BD _T +C ₂

wherein T is ₁ 、T ₂ 、T ₃ ...T _n For the temperature of each temperature measuring point,for the average value of the temperature of each temperature measuring point B, C ₂ Is constant.