CN108426345A - A kind of multi-connected machine outdoor unit defrosting control system and method - Google Patents

Abstract

The invention discloses a kind of multi-connected machine outdoor unit defrosting control system and methods, imaging sensor including being set to multi-connected machine outdoor unit unit fin surface, imaging sensor is connected with defrosting controller by imaging signal transmission line, and defrosting controller is connected to by the control line that defrosts except defrosting system；Multi-connected machine outdoor unit unit fin surface frosting information is sent to defrosting controller by imaging sensor for obtaining multi-connected machine outdoor unit unit fin surface frosting image information；Image is acquired using imaging sensor, once reach predetermined threshold value, you can defrosting processing is carried out, can be defrosted in time, defrosting effect is good, improves building comfort, economic and reliable, operation is rationally, it is easy for installation, image is acquired using imaging sensor, once reach predetermined threshold value, defrosting processing can be carried out, can be defrosted in time, defrosting effect is good, building comfort is improved, using automatically controlling, cold snap is not necessarily to personal management, economic and reliable, operation is reasonable, easy for installation.

Description

A multi-connected outdoor unit defrosting control system and method

technical field

The invention belongs to the field of research on energy saving of building equipment, and in particular relates to a multi-connected outdoor unit defrosting control system.

Background technique

The defrosting research technologies of air source heat pump system and outdoor unit of multi-connected air conditioning system are rich and varied, and there are also many defrosting control methods. Control method, self-correction defrosting control method, air pressure difference defrosting control method, maximum average heating capacity defrosting control method and more than ten kinds of defrosting control methods; fuzzy intelligent control defrosting method; refrigerant superheat defrosting control method ; Fan current and evaporation temperature combined control defrosting method; comprehensive frosting index (FI) to judge the defrosting control method; indoor and outdoor dual sensor defrosting control method; temperature difference defrosting control method; temperature difference-time defrosting control method ;

Through actual observation and testing, researchers often find that the above-mentioned defrosting control method often appears in the process of "wrong defrosting" phenomenon. The main reasons are as follows:

1) Lack of comprehensive cognition and monitoring of the frosting process, resulting in uncertain defrosting;

2) One-sided understanding of the frosting area, resulting in incomplete defrosting;

3) Ignore the drainage problem of the heat exchanger;

4) Insufficient attention to operating conditions;

Therefore, in order to achieve accurate defrosting of multi-connected outdoor units under low temperature and high humidity conditions in winter, we need to develop and research reliable defrosting control technology.

Contents of the invention

The object of the present invention is to provide a multi-connected outdoor unit defrosting control system to overcome the deficiencies of the prior art.

To achieve the above object, the present invention adopts the following technical solutions:

A multi-connected outdoor unit defrosting control system, including an imaging sensor arranged on the fin surface of the multi-connected outdoor unit, the imaging sensor is connected to a defrosting controller through an imaging signal transmission line, and the defrosting controller is connected to the defrosting control line through a defrosting control line. defrosting system;

The imaging sensor is used to obtain the image information of frosting on the fin surface of the multi-connected outdoor unit unit, and transmit the frosting information on the fin surface of the multi-connected outdoor unit unit to the defrosting controller;

The defrosting controller is used to receive the frosting image information on the fin surface transmitted by the imaging sensor, and compare it with the preset threshold value of the storage unit of the defrosting controller. If the preset threshold value is exceeded, the defrosting controller controls the defrosting system to perform defrosting processing , otherwise no defrosting will be performed.

Further, the defrosting controllers are evenly distributed on the surface of the fins of the unit.

Further, the defrosting system is an air-conditioning self-defrosting system or a physical heating defrosting system.

Further, the defrosting system adopts multi-point uniform distribution.

A multi-connected outdoor unit defrosting method of a multi-connected outdoor unit defrosting control system includes the following steps:

The frosting image information on the fin surface of the multi-connected outdoor unit is collected in real time. When the preset defrosting threshold is reached, the defrosting system is used for defrosting processing, otherwise no processing is performed.

Further, specifically, the imaging sensor collects the frosting image information on the fin surface of the multi-connected outdoor unit in real time, and transmits it to the defrosting controller. The defrosting controller compares the information collected by the imaging sensor with the preset threshold. When the amount of frost on the fin surface of the multi-connected outdoor unit is greater than the preset threshold, the defrosting process is performed; otherwise, the defrosting process is not performed.

Further, specifically, multiple imaging sensors are arranged on the surface of the fins of the multi-connected outdoor unit.

Further, the imaging sensor is a CMOS image sensor.

Further, multiple imaging sensors are used to collect the frosting states of different areas, and when a frosted area appears, the defrosting controller through the hole can individually defrost the area.

Compared with the prior art, the present invention has the following beneficial technical effects:

A multi-connected outdoor unit defrosting control system of the present invention includes an imaging sensor arranged on the surface of the fins of the multi-connected outdoor unit, the imaging sensor is connected to a defrosting controller through an imaging signal transmission line, and the defrosting controller is connected through a defrosting control line Connected to the defrosting system; the imaging sensor is used to obtain the frosting image information on the fin surface of the multi-connected outdoor unit unit, and transmit the frosting information on the fin surface of the multi-connected outdoor unit unit to the defrosting controller; the defrosting controller is used to receive The frosting image information on the fin surface transmitted by the imaging sensor is compared with the preset threshold value of the storage unit of the defrosting controller. If the preset threshold value is exceeded, the defrosting controller controls the defrosting system to perform defrosting processing, otherwise no defrosting is performed Processing, simple structure, using imaging sensors to collect images, once the preset threshold is reached, defrosting can be performed, defrosting in time, good defrosting effect, improving building comfort, economical and reliable, reasonable operation, easy installation.

A multi-connected outdoor unit defrosting method for a multi-connected outdoor unit defrosting control system uses an imaging sensor to collect images, and once the preset threshold is reached, the defrosting process can be performed, and the defrosting can be performed in time, the defrosting effect is good, and the building can be improved. It adopts automatic control, no special management is needed in cold weather, economical and reliable, reasonable operation and easy installation. Through image perception, accurately record the frosting state, frosting thickness, frosting distribution, and frosting amount of multi-connected outdoor unit fins, so as to judge the defrosting control point; the defrosting control point is accurate, when the image senses the unit When the frosting on the surface of the fin reaches the frosting thickness or frosting amount set by the program, the unit will start to defrost, which can avoid the occurrence of "no frost defrosting" or "frosting without defrosting" of the unit. "Phenomenon.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

In the figure, 2. Multi-connected outdoor unit; 3. Defrost controller; 4. Defrost control line; 5. Imaging sensor; 6. Imaging signal transmission line; 7. Unit fins.

Detailed ways

The present invention is described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1, a multi-connected outdoor unit defrosting control system includes an imaging sensor 5 arranged on the surface of the fin 7 of the multi-connected outdoor unit 2, and the imaging sensor 5 is connected to a defrosting controller 3 through an imaging signal transmission line 6 , the defrost controller 3 is connected to the defrost system through the defrost control line 4;

The imaging sensor 5 is used to acquire the image information of frosting on the surface of the fins 7 of the multi-connected outdoor unit 2, and transmit the frosting information on the surface of the fins 7 of the multi-connected outdoor unit 2 to the defrosting controller 3;

The defrosting controller 3 is used to receive the frosting image information on the fin surface transmitted by the imaging sensor, and compare it with the preset threshold value of the storage unit of the defrosting controller 5. If the preset threshold value is exceeded, the defrosting controller 3 controls the defrosting system Perform defrosting treatment, otherwise do not perform defrosting treatment.

The defrosting system is the self-defrosting system of the air conditioner or the physical heating defrosting system.

The defrosting controllers 3 are evenly distributed on the surface of the fins 7 of the unit.

The defrosting system adopts multi-point uniform distribution, that is, multiple defrosting systems are installed outside the fins 7 of the multi-connected outdoor unit 2 to realize frosting in different areas and defrosting in different areas, avoiding large-scale defrosting and causing energy waste , can achieve the purpose of accurate defrosting.

An image sensor control defrosting method for multi-connected outdoor units, comprising the following steps:

The frosting image information on the fin surface of the multi-connected outdoor unit is collected in real time. When the preset defrosting threshold is reached, the defrosting system is used for defrosting processing, otherwise no processing is performed.

Specifically, the imaging sensor 5 collects the frosting image information on the fin surface of the multi-connected outdoor unit in real time, and transmits it to the defrosting controller 3. The defrosting controller 3 compares the information collected by the imaging sensor 5 with the preset threshold, and when When the collected amount of frosting on the surface of the fins of the multi-connected outdoor unit is greater than the preset threshold, the defrosting process is performed; otherwise, the defrosting process is not performed.

Multiple imaging sensors 5 are used to collect frosting states in different areas. When a frosting area appears, the through-hole defrosting controller 3 can defrost the area independently, ensuring that the fin surface of the multi-connected outdoor unit can be defrosted in time. Frost.

A plurality of imaging sensors 5 are arranged on the surfaces of the fins 7 of the multi-connected outdoor units 2 .

The imaging sensor 5 is a CMOS image sensor.

The defrosting controller 3 is provided with a storage unit for storing preset thresholds and recording defrosting information, which is convenient for later comparison of maintenance information.

In winter conditions, under certain low temperature and high humidity conditions, the fins of the multi-connected outdoor unit will frost. Timely defrosting is of great significance to ensure the efficient operation of the unit. Using imaging technology to track the surface of the unit fins Frosting status changes to control the defrosting of the unit. When the frost layer on the fins reaches a certain level and reaches the defrosting point set by the imaging sensor, that is, the preset threshold, the imaging sensor will send the defrosting signal to the defrosting sensor through the signal transmission line. The controller sends out a message, and after receiving the signal, the defrosting controller sends out a defrosting command through the defrosting control line to start defrosting, using the air conditioner's own defrosting system for defrosting, or using the physical heating system for rapid defrosting, so that the air conditioner outside The surface of the machine is cleaned; when the defrosting reaches a certain level, the imaging sensor detects that the amount of frosting on the fins of the multi-connected outdoor unit is less than the preset threshold, and sends a wind speed signal to the defrosting controller through the signal transmission line, and the defrosting controller After receiving the signal, an end defrosting command is issued through the defrosting control line, and the defrosting ends.

The system is simple, adopts automatic control, and does not need special management in cold weather. The imaging sensor is used to collect images. Once the preset threshold is reached, the defrosting process can be performed. The defrosting can be performed in time, the defrosting effect is good, and the comfort of the building is improved. Economical and reliable, reasonable operation, easy installation. Through image perception, accurately record the frosting state, frosting thickness, frosting distribution, and frosting amount of multi-connected outdoor unit fins, so as to judge the defrosting control point; the defrosting control point is accurate, when the image senses the unit When the frosting on the surface of the fin reaches the frosting thickness or frosting amount set by the program, the unit will start to defrost, which can avoid the occurrence of "no frost defrosting" or "frosting without defrosting" of the unit. "Phenomenon.

Claims (9)

1. A multi-connected outdoor unit defrosting control system, characterized in that it includes an imaging sensor (5) arranged on the surface of the fins (7) of the multi-connected outdoor unit (2), and the imaging sensor (5) passes through the imaging signal transmission line (6) A defrosting controller (3) is connected, and the defrosting controller (3) is connected to the defrosting system through a defrosting control line (4); The imaging sensor (5) is used to acquire the frosting image information on the surface of the fins (7) of the multi-connected outdoor unit (2), and transmit the frosting information on the surface of the fins (7) of the multi-connected outdoor unit (2) to the defrosting controller(3); The defrosting controller (3) is used to receive the frosting image information on the fin surface transmitted by the imaging sensor, and compare it with the preset threshold value of the storage unit of the defrosting controller (5). If the preset threshold value is exceeded, the defrosting controller ( 3) Control the defrosting system to perform defrosting treatment, otherwise no defrosting treatment will be performed. 2. A multi-connected outdoor unit defrosting control system according to claim 1, characterized in that the defrosting controllers (3) are evenly distributed on the surface of the unit fins (7). 3. A multi-connected outdoor unit defrosting control system according to claim 1, wherein the defrosting system is an air conditioner self-defrosting system or a physical heating defrosting system. 4. A multi-connected outdoor unit defrosting control system according to claim 3, characterized in that the defrosting system adopts multi-point uniform distribution. 5. A multi-connected outdoor unit defrosting method based on a multi-connected outdoor unit defrosting control system according to claim 1, characterized in that it comprises the following steps: The frosting image information on the fin surface of the multi-connected outdoor unit is collected in real time. When the preset defrosting threshold is reached, the defrosting system is used for defrosting processing, otherwise no processing is performed. 6. A method for defrosting multi-connected outdoor units controlled by an image sensor according to claim 5, characterized in that, specifically, the imaging sensor (5) collects the frosting image information on the fin surface of the multi-connected outdoor unit in real time, And send it to the defrosting controller (3), the defrosting controller (3) compares the information collected by the imaging sensor (5) with the preset threshold value, when the collected frosting amount on the fin surface of the multi-connected outdoor unit is greater than the preset When the threshold is set, the defrosting process is performed, otherwise the defrosting process is not performed. 7. A method for defrosting multi-connected outdoor units controlled by an image sensor according to claim 6, characterized in that, specifically, a plurality of imaging sensors are arranged on the surface of the fins (7) of the multi-connected outdoor unit (2) (5). 8. A method for defrosting multi-connected outdoor units controlled by an image sensor according to claim 6, characterized in that the imaging sensor (5) is a CMOS image sensor. 9. A method for defrosting multi-connected outdoor units controlled by an image sensor according to claim 6, characterized in that multiple imaging sensors (5) are used to collect frosting states in different areas, when a frosting area appears, that is The area can be individually defrosted through the hole defrosting controller (3).