KR102373235B1 - refrigeration and air-conditioning system and diagnostic method thereof - Google Patents

Abstract

A method for diagnosing a refrigeration and air conditioning system according to an embodiment of the present invention includes an outdoor unit, a plurality of indoor units having a type that performs at least one of refrigeration, freezing, cooling, and heating, and diagnosing the operating state of the indoor unit and the outdoor unit A refrigeration and air conditioning system provided with a diagnostic device comprising the steps of: receiving data from an operation state detecting means provided in the outdoor unit and the indoor unit; determining whether a driving cycle is normal based on the received data; and providing a cause candidate group when it is determined that the driving cycle is abnormal, wherein the cause candidate group is provided with a probability value indicating a possibility of corresponding to the cause of the abnormal driving cycle for each cause candidate do it with

Description

Refrigeration and air-conditioning system and its diagnostic method {refrigeration and air-conditioning system and diagnostic method thereof}

The present invention relates to a refrigeration and air conditioning system and a diagnostic method therefor.

The refrigeration cycle refers to a cycle in which four processes of compression, condensation, expansion, and evaporation are sequentially repeated to cause a change in the state of the refrigerant. In addition, the refrigeration cycle is used for various purposes such as refrigeration, freezing, heating, and heating in daily life. As home appliances using a refrigeration cycle, a refrigerator, an air conditioner, a boiler, and the like are representative.

BACKGROUND ART In general, a refrigerator is a home appliance that allows food to be stored in an internal storage space that is shielded by a door. It is configured to store food in an optimal state.

In addition, types of refrigerators may be classified according to purpose of use. For example, in order to emphasize the display function, a type of refrigerator configured to view contents stored in a storage space is called a showcase.

A showcase is a device for keeping food and the like fresh, and typically includes a storage room with an open front. In addition, the showcase is mainly used in large marts and butchers, and provides a refrigeration or freezing function.

An air conditioner is a device for maintaining the air in a predetermined space in the most suitable state according to the use and purpose. In general, an air conditioner includes a compressor, a condenser, an expansion device, and an evaporator, and a refrigerant cycle for performing compression, condensation, expansion and evaporation of the refrigerant is driven to cool or heat the predetermined space. .

The predetermined space may be variously proposed according to a place where the air conditioner is used. For example, when the air conditioner is disposed in a home or office, the predetermined space may be an indoor space of a house or a building. On the other hand, when the air conditioner is disposed in a vehicle, the predetermined space may be a boarding space in which a person rides.

When the air conditioner performs a cooling operation, the outdoor heat exchanger provided in the outdoor unit functions as a condenser, and the indoor heat exchanger provided in the indoor unit functions as an evaporator. On the other hand, when the air conditioner performs a heating operation, the indoor heat exchanger functions as a condenser and the outdoor heat exchanger functions as an evaporator.

On the other hand, a plurality of home appliances using the above-described refrigeration cycle are provided in homes, large marts, convenience stores, and the like, and are widely used. And each home appliance using the refrigeration cycle is driven while performing a refrigeration cycle individually.

However, when individual refrigeration cycles are performed for each home appliance, heat, noise, power consumption, etc. generated by each home appliance may affect other home appliances installed in the same space, which is inefficient for each home appliance. It can cause energy consumption.

In addition, when home appliances using the same refrigerant cycle are individually driven, a plurality of overlapping configurations may be used, resulting in an energy waste problem. In addition, department stores, large marts, convenience stores, etc. have a disadvantage in that it is difficult to predict the electricity demand for the entire building. In addition, individual installation and construction is required for each home appliance, and space, time, and manpower are wasted due to individual management problems for each home appliance.

In order to solve this problem, there is an increasing demand for a refrigeration and air conditioning system capable of improving energy consumption efficiency by integrating overlapping configurations of home appliances using the refrigeration cycle that are individually installed in a predetermined space.

The related prior literature information is as follows.

1. Publication number: 10-2004-0020535 (Publication date: March 09, 2004)

Title of Invention: Integrated Refrigeration and Cooling System

The above-mentioned prior literature discloses an integrated refrigeration and air conditioning system in which a plurality of compressors and condensers of a plurality of cooling and refrigeration devices provided in an indoor space are integrated and installed outdoors.

However, there is a problem in that the refrigeration and air conditioning system as in the prior literature cannot diagnose the operating state according to the function performed by each refrigeration and air conditioner (home appliance) and provide feedback according to the diagnosis result.

On the other hand, in the conventional diagnosis process for managing a single home appliance, a manager (engineer) of a single home appliance interprets data sensed by a limited and predetermined detection means to schematically derive a group of causes of abnormal operation, and then While carrying out actions for the cause, the repair is performed in a way that finds the exact cause and responds to it.

In addition, in the conventional single home appliance, human factors such as the manager's experience, competency, and technical field are significantly involved in diagnosing the home appliance and taking measures accordingly.

In addition, in the refrigeration and air conditioning system, since a plurality of home appliances are complexly connected, the type, number, detection target, data, etc. of the sensing means for diagnosing the refrigeration cycle operation are much larger and more complex than that of a single home appliance.

That is, when the operation of the refrigeration and air conditioning system is an abnormal operation, the data that an administrator needs to interpret to find the cause of the abnormal operation may be much larger than that of a single home appliance. Therefore, there is a problem in that it is very difficult to make a diagnosis by interpreting massive data only with the above-described human factors. In addition, there is a problem in that the number of cases for the cause of the abnormal operation increases exponentially more than in a single home appliance.

In addition, since the refrigeration and air conditioning system is provided with various technical fields, such as a refrigerator technology field and an air conditioner technology field, the relative deviation of the above-mentioned human factors such as the competency of a manager (engineer) is very large. Therefore, when the diagnosis of the refrigeration and air conditioning system is performed based on the human factors, the risk of a misdiagnosis that provides different diagnosis results even when looking at the same data may be very large. That is, there is a problem in that the accuracy of the diagnosis of the refrigeration and air conditioning system is lowered.

In addition, there is a problem in that reliability decreases because the time required to solve the same problem, cost, result, etc. vary under the influence of human factors.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a refrigeration and air conditioning system capable of diagnosing whether there is an abnormality in operation by accurately and quickly analyzing massive data sensed by a sensing means and a method for diagnosing the same.

Another object of the present invention is to provide a refrigeration and air conditioning system capable of minimizing the risk of a diagnosis error that may occur due to human factors such as the technical field, experience, and competency of the manager (engineer) and a diagnosis method thereof. .

Another object of the present invention is to provide a refrigeration and air conditioning system capable of providing an optimal action according to a large amount of sensing data of a sensing means for detecting the presence or absence of abnormality in refrigeration cycle operation and a method for diagnosing the same.

Another object of the present invention is to provide a refrigeration and air conditioning system capable of improving the reliability of a diagnosis result for abnormality in refrigeration cycle operation and a diagnosis method thereof.

Another object of the present invention is to provide a refrigeration and air conditioning system capable of improving accuracy by continuously updating a diagnostic process that determines whether there is an abnormality in refrigeration cycle operation and suggests a cause thereof and a diagnostic method therefor. .

In a refrigeration and air conditioning system according to an embodiment of the present invention, an outdoor unit and the outdoor unit are commonly used, and an indoor unit provided in a plurality of types, a converter provided for compatibility between the indoor unit provided in the plurality of types and the outdoor unit, the above and a driving condition detecting means provided in the outdoor unit and the indoor unit, and a diagnostic device for receiving detection data from the driving condition detecting means to determine whether there is an abnormal state in a driving cycle, wherein the diagnosis device is configured to: , it is characterized in that the cause candidate group for the abnormality is provided by applying a priority according to a probability value. Therefore, it is possible to easily interpret massive data through the diagnostic device and obtain an optimized diagnostic result.

In addition, the probability value of the cause candidate group may be increased or decreased as the determination of the presence or absence of an abnormal state in the driving cycle is accumulated. Therefore, it is possible to provide optimal diagnosis results and measures even if the number of cases for abnormal causes that can be suggested in the refrigeration and air conditioning system is vast.

In addition, the diagnosis apparatus may include: a control unit; storage means for storing information; a display unit capable of providing the cause candidate group as a screen and an input unit capable of inputting action details for at least one cause candidate among the cause candidate group, wherein the control unit includes: the input action details and the cause Candidates can be matched and stored in the storage means, and the probability value for the matched cause candidate is increased or decreased according to the determination result of whether or not the driving cycle is in an abnormal state. Accordingly, countermeasures according to data interpretation can be stored in detail, and the accuracy of the diagnosis result can be improved as the diagnosis data is accumulated.

In another aspect, the method for diagnosing a refrigeration and air conditioning system according to an embodiment of the present invention includes an outdoor unit, a plurality of indoor units having a type that performs at least one function of refrigeration, freezing, cooling, and heating, and the indoor unit and the outdoor unit A refrigeration and air conditioning system provided with a diagnostic device for diagnosing an operating state of determining whether a driving cycle is normal based on the received data; and providing a cause candidate group when it is determined that the driving cycle is abnormal, wherein the cause candidate group is provided with a probability value indicating a possibility of corresponding to the cause of the abnormal driving cycle for each cause candidate do it with

In addition, the cause candidate group is characterized in that the priority is determined and presented according to the probability value.

In addition, the diagnostic apparatus may include: a controller for processing data; and a display unit providing a screen, wherein the cause candidate group is output on the screen.

In addition, the screen of the display unit, a display screen on which the received data is output in real time; and a diagnosis result screen providing the cause candidate group, wherein the display screen is divided into a plurality of screens, and the divided screens sequentially update the received data.

In addition, the determining whether the driving cycle is normal may include determining by comparing the received data with a primary reference range previously stored in the diagnosis apparatus.

In addition, when the received data is out of the primary reference range, the method further includes a risk determination step of determining whether a dangerous state or a warning state is present, wherein the risk determination step includes a pre-stored secondary reference range. It is determined as a warning state, and when it is out of the secondary reference range, it is characterized in that it is determined as a dangerous state.

In addition, the warning state and the dangerous state are displayed in different colors through the diagnosis device.

In addition, the diagnosis apparatus is characterized in that when it is determined that the operation cycle is abnormal, it is characterized in that it provides an action manual.

On the other hand, the method for diagnosing the refrigeration and air conditioning system includes: inputting action details for the abnormal operation cycle; matching a cause candidate corresponding to the input action information from among the cause candidate group; and re-determining whether the driving cycle is normal, wherein when the driving cycle is normal as a result of the re-judgment, the probability value for the corresponding cause candidate is increased, and when the driving cycle is abnormal as a result of the re-judgment, It is characterized in that the probability value of the corresponding cause candidate is reduced. Accordingly, the diagnostic device can interpret the sensed data in real time to suggest the cause of the abnormality and a solution. Ultimately, it is possible to reduce the influence of human factors.

In addition, when the probability value for the corresponding cause candidate is reduced, the process of providing the cause candidate group is characterized in that the process returns. Therefore, the matching of the cause of the abnormality according to the data analysis can be continuously adjusted, so that erroneous diagnosis can be prevented.

According to the present invention, it is possible to improve the diagnostic capability of the refrigeration and air conditioning system.

According to the present invention, it is possible to easily interpret the vast amount of detected data of the refrigeration and air conditioning system, and since the cause of the abnormality and the corresponding action plan are suggested, the management convenience can be improved.

According to the present invention, by minimizing the influence of human factors, diagnosis results and measures for the refrigeration and air conditioning system can be provided uniformly. Accordingly, time and cost for diagnosing the refrigeration and air conditioning system can be reduced, thereby improving economic efficiency.

According to the present invention, there is an advantage in that the cause of the abnormality of the refrigeration and air conditioning system provided by the diagnostic device is prioritized according to probability. According to this, since it is possible to quickly determine the cause of the abnormality and take action, there is an effect of improving the efficiency of diagnosis.

According to the present invention, since the matching probability of the abnormal cause with respect to the specific sensed data is continuously updated according to the data accumulation, the accuracy of the abnormal cause suggested by the diagnosis apparatus is improved.

According to the present invention, since the probability value for applying the priority of the abnormal cause can be continuously updated, the reliability of the diagnosis result is improved.

1 is a conceptual diagram of a refrigeration and air conditioning system according to an embodiment of the present invention;
2 is a view showing a cycle of a refrigeration and air conditioning system according to an embodiment of the present invention;
3 is a view showing the configuration of a refrigeration and air conditioning system according to an embodiment of the present invention;
4 is a diagram showing the configuration of a diagnostic apparatus according to an embodiment of the present invention;
5 is a flowchart illustrating a method for diagnosing a refrigeration and air conditioning system according to an embodiment of the present invention;
Fig. 6 is a flowchart showing in detail the action steps of Fig. 5;
7 is a view showing a display screen provided by a display unit of a diagnosis apparatus according to an embodiment of the present invention;
8 is a view showing another display screen provided by a display unit of a diagnosis apparatus according to an embodiment of the present invention;

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented below, and those skilled in the art who understand the spirit of the present invention may change other embodiments included within the scope of the same spirit by adding, changing, deleting, and adding components. It will be easy to implement, but this will also be included within the scope of the present invention.

In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

1 is a conceptual diagram of a refrigeration and air conditioning system according to an embodiment of the present invention.

The refrigeration and air conditioning system according to an embodiment of the present invention may be defined as a system in which a plurality of home appliances using a cooling cycle are integrated. In more detail, the refrigeration and air conditioning system may be understood as a system in which a plurality of indoor units that may be provided in different types (types) are configured to use outdoor units in common.

Referring to FIG. 1 , a refrigeration and air conditioning system according to an embodiment of the present invention includes a diagnostic device 10 for diagnosing the system, an outdoor unit 20 connected to the diagnostic device 10 by wire or wirelessly, and the outdoor unit 20 ) and may include a plurality of indoor units 30 connected to each other.

The outdoor unit 20 may be connected to the indoor unit 30 through a pipe to implement a refrigeration cycle. In addition, the outdoor unit 20 and the indoor unit 30 may include operation state detection means including a plurality of temperature sensors and pressure sensors to check the cycle operation state. For example, the plurality of temperature sensors may be provided to measure an indoor air temperature, an internal temperature, and an inlet and outlet temperature of a pipe.

In addition, the outdoor unit 20 and the indoor unit 30 may be provided with communication means for transmitting and receiving data, respectively.

The outdoor unit 20 may be connected to a plurality of indoor units 30 . The plurality of indoor units 30 may use the outdoor unit 20 in common. In addition, the plurality of indoor units 30 may be provided in different types (types).

The indoor unit 30 may include a plurality of types to perform at least one of refrigerating, freezing, cooling, and heating functions. In addition, the indoor unit 30 may be provided to perform a function of cooling or heating air, water, or the like.

Here, the type of the indoor unit 20 may include an air conditioner 35 , a showcase 36 , a boiler, a hot water generator, and the like. That is, the indoor unit 30 may include at least one of an air conditioner 35 , a showcase 36 , a boiler, and a hot water generator.

Also, the air conditioner 35 may include a ceiling type, a stand type, and a wall mounted type. In addition, the showcase 36 may include a refrigerated showcase and a refrigerated showcase. Of course, the type of the indoor unit 30 is not limited to the above-described type. That is, it can be understood that the type of the indoor unit 30 includes all home appliances that can be provided equivalently to the above-described indoor unit among home appliances using a refrigeration cycle.

2 is a view showing a cycle of a refrigeration and air conditioning system according to an embodiment of the present invention. An exemplary cycle configuration of the refrigeration and air conditioning system will be described with reference to FIG. 2 .

Referring to FIG. 2 , the outdoor unit 20 includes compressors 21a and 21b, an accumulator 28 that guides the inflow of gaseous refrigerant into the compressors 21a and 21b, and recovers oil to the compressors 21a and 21b. It may include oil separators (22a, 22b). In addition, the accumulator 28 may be connected to a showcase 36 of the indoor unit 30 .

In addition, the outdoor unit 20 may include a plurality of heat exchangers 23 , an intercooler 35 , and a fan 24 capable of performing an evaporator or condenser function. In addition, the intercooler 35 may be connected to the air conditioner 35 among the indoor units 30 to provide a cooling or heating function to the room.

The air conditioner 35 may be provided in plurality, and an electromagnetic expansion valve may be installed in each of the plurality of pipes connecting the plurality of air conditioners 35 and the intercooler 35 .

In addition, the outdoor unit 20 may further include a receiver 25 and a supercooler 26 connected to the intercooler 35 . The supercooler 26 may be connected to a showcase 36 of the indoor units 30 .

The showcase 36 may be provided in plurality, and an electromagnetic expansion valve 27 may be installed in each of the plurality of pipes connecting the plurality of showcases 36 and the supercooler 26 .

In addition, the indoor unit 30 may also include a heat exchanger and a plurality of valves that function as an evaporator or a condenser.

Accordingly, the indoor unit 30 having a plurality of types disposed indoors may be connected to the common outdoor unit 20 disposed outdoors to form a refrigeration cycle. And, in the refrigerant circulation process, the indoor unit 30 may use a refrigerant to perform a function suitable for each type.

3 is a view showing the configuration of a refrigeration and air conditioning system according to an embodiment of the present invention.

Referring to FIG. 3 , as described above, the indoor unit 30 may be provided in various types. However, a data processing method may be different depending on the type of the indoor unit 30 . Accordingly, data transmitted and received according to the type of the indoor unit 30 need to be compatible with the data processing method of the outdoor unit 20 .

That is, the refrigeration and air conditioning system 10 may further include a converter 31 for compatibility between a data processing method that varies depending on the type of the indoor unit 30 and a data processing method of the outdoor unit 20 .

In another aspect, the converter 31 may perform data conversion so that data transmitted and received between the indoor unit 30 , the outdoor unit 20 , and the diagnostic device are mutually compatible.

In more detail, the converter 31 may perform a function of converting different data types according to the type and manufacturer of the indoor unit 30 into a data type that the common outdoor unit 20 can process.

For example, when the indoor unit 30 is provided as a refrigeration showcase and a refrigeration showcase, the refrigeration showcase and the refrigeration showcase may transmit or receive information in different data types. That is, the refrigeration showcase can read or export driving information data in units of predetermined bits, and the refrigeration showcase can read or export driving information data in units of predetermined bytes. In this case, if the outdoor unit 20 processes information data in a specific byte unit, the data of the refrigeration showcase and the refrigeration showcase need to be converted to match the data type of the outdoor unit 20 . Accordingly, the converter 31 connected to the refrigeration showcase may convert the received data of the refrigeration showcase and transmit it to the outdoor unit 20 , and may convert the data received from the outdoor unit 20 and transmit it to the refrigeration showcase. Similarly, the converter 31 connected to the refrigeration showcase may convert the received data of the refrigerated showcase and transmit it to the outdoor unit 20 , and may convert the data received from the outdoor unit 20 and transmit it to the refrigerated showcase.

That is, the converter 31 may perform a function of converting data so that accurate data can be transmitted and received between the indoor unit 30 and the outdoor unit 20 provided in a plurality of types. Therefore, by the converter 31, the indoor unit 30 provided in a plurality of types, the outdoor unit 20 connected to the indoor unit 30, the indoor unit 30, and the outdoor unit 20 are checked for operating conditions, and The diagnostic apparatus 10 capable of diagnosing may perform mutually unified and accurate data processing. According to this, there is an advantage in that it is possible to prevent errors due to data processing that may occur in the diagnostic process of determining whether the operation of the refrigeration and air conditioning system is abnormal.

Meanwhile, in the converter 31 , based on the information transmitted from the connected indoor unit 30 to the outdoor unit 20 according to the type of the indoor unit 30 connected to the converter 31 , the connected indoor unit 30 is It may perform a function of processing data so as to receive an appropriate feedback from the outdoor unit 20 . The control device 10 may be connected to the outdoor unit 20 by wire or wirelessly to check driving information data for the outdoor unit 20 and the indoor unit 50 in real time, and control to change driving conditions.

4 is a diagram showing the configuration of a diagnosis apparatus according to an embodiment of the present invention.

Referring to FIG. 4 , the diagnosis apparatus 10 includes a control unit 11 for initiating diagnosis, a communication unit 12 for transmitting and receiving data, a storage unit 13 , and a display unit 14 for providing an output screen. and an input unit 15 capable of inputting specific commands or information.

The control unit 11 may perform a function of processing transmitted and received information and data, and providing a control command. Here, the information and data transmitted and received means information and data transmitted and received by the communication means 12 as well as information and data input by the input unit 15 and stored in the storage means 13 . It can be defined as meaning including information and data.

The control unit 11 may receive information and data provided by the driving state detection unit provided in the indoor unit 50 and the outdoor unit 20 by the communication unit 12 .

The controller 11 may perform an algorithm for determining whether there is an abnormality in the cycle operation of the indoor unit 30 and the outdoor unit 20 based on the sensed data provided from the driving state detection means. In addition, the control unit 11 may provide a control command for providing feedback according to the presence or absence of abnormalities such as a change in the amount of refrigerant or a change in the operating frequency of the compressor.

Also, the control unit 11 may control to output a predetermined screen to the display unit 14 . For example, the control unit 11 may output the received detection data to the display unit 14 in real time.

Also, when a specific command is input by the input unit 15 , the control unit 11 may control the specific command.

The communication means 12 may include a local area network (LAN) module, a Bluetooth module, a Wi-Fi module, a ZigBee module, and the like. In addition, by the communication means 12 , the diagnosis apparatus 10 and the outdoor unit 20 and/or the indoor unit 30 can establish wired and wireless communication. For example, the communication means 12 may be connected to the communication means built into the outdoor unit 20 to transmit and receive data to and from each other. In addition, when the communication means 12 is a Bluetooth module, the user may input a serial number or password of the Bluetooth communication module built into the outdoor unit 20 through the input unit 15 of the diagnosis device 10 . Then, the paired outdoor unit 20 is displayed on the display unit 14 of the diagnosis apparatus 10 , and information on the paired outdoor unit 10 can be stored or read by the storage means 13 .

The storage means 13 may include a memory. In addition, various types of information and data transmitted and received by the control device 10 may be stored in the memory.

The display unit 14 may include a liquid crystal panel. The display unit 14 may visualize and output the operating states of the outdoor unit 20 and the indoor unit 30 .

The input unit 15 may include a keypad. Also, the display unit 14 and the input unit 15 may be integrally formed. For example, the display unit 14 may include a touch type display among liquid crystal panels. In this case, the input unit 15 is configured in the display screen, and can perform an input by a user's touch.

On the other hand, the refrigeration and air conditioning system according to the embodiment of the present invention uses a refrigeration cycle in common, but separate technical fields are fused. Accordingly, an engineer in the field of air conditioner technology or an engineer in the field of refrigerator technology may check and diagnose the operating state for managing the refrigeration and air conditioning system.

However, due to the convergence of distinct technical fields, the interpretation or diagnosis result of the data identified by the diagnostic device 10 may vary depending on which technical field the engineer managing the refrigeration and air conditioning system is engaged in, and eventually, It can cause confusion. In other words, even with the same data, there is a risk of making errors in diagnosis content and diagnosis results due to different methods of interpreting data between technical fields.

The refrigeration and air conditioning system according to an embodiment of the present invention can provide an engineer with a diagnosis result and an abnormality cause by uniformly processing the data sensed by the driving state detection means. Therefore, there is an advantage in that it is possible to reduce the deviation of data interpretation according to the engineer's human factors (competence, technical field, etc.) and to make a unified diagnosis result.

In this regard, a diagnostic method for cycle operation of the refrigeration and air conditioning system will be described in detail below.

5 is a flowchart showing a method for diagnosing a refrigeration and air conditioning system according to an embodiment of the present invention, FIG. 6 is a flowchart showing the action steps of FIG. 5 in detail, and FIG. 7 is a diagnosis apparatus according to an embodiment of the present invention is a view showing a display screen provided by the display unit, and FIG. 8 is a view showing another display screen provided by the display unit of the diagnostic apparatus according to an embodiment of the present invention.

Referring to FIG. 5 , in the method for diagnosing a refrigeration and air conditioning system according to an embodiment of the present invention, a data receiving step of receiving detection data from a plurality of operation state detection means provided in the outdoor unit 20 and the indoor unit 30 ( S10 ) and a data conversion step (S20).

In detail, the driving state detection means provided in the outdoor unit 20 and/or the indoor unit 30 may provide sensing data, respectively. In addition, each of the sensed data may be transmitted to the diagnosis apparatus 10 through a communication means provided in the outdoor unit 20 and/or the indoor unit 30 . The diagnosis apparatus 10 may receive the sensed data through the communication means 12 (S10).

Meanwhile, a data conversion step ( S20 ) of the sensed data provided from the sensing means provided in the indoor unit 30 may be further performed through the converter 31 .

That is, for compatibility of data processing methods that vary depending on the type of the indoor unit 30 , the converter 31 receives the sensing data provided from the driving state detection means provided in the indoor unit 30 primarily to the outdoor unit. (20) and the detection data can be converted to be used in common with the diagnostic device 10. (S20)

In addition, the converted data may be transmitted to the outdoor unit 20 and/or the diagnosis apparatus 10 through the communication means of the indoor unit 30 .

The refrigeration and air conditioning system diagnosis method according to an embodiment of the present invention may further include a cycle normality determination step (S30), a risk determination step (S50), and a cause candidate presentation step (S80).

In detail, the communication means 12 of the diagnosis apparatus 10 may receive the sensed data and provide it to the control unit 11 . In addition, the control unit 11 may determine whether the operation cycle of the refrigeration and air conditioning system is operating within a normal range based on the received data (S30).

Whether the operation cycle of the refrigeration and air conditioning system is operating within a normal range may be determined according to a criterion stored in advance in the storage means 15 of the diagnosis apparatus 10 . For example, when the detection data of the pressure sensor provided to determine whether the high pressure is stable during the cooling and heating operation of the compressor is less than the reference value of 3480 kPa, the control unit 11 determines that the operation is within a normal range, If the reference value is exceeded, it can be determined that it is out of the normal range.

In addition, when the detection data of the pressure sensor provided to determine whether the low pressure is stable during the cooling and heating operation of the compressor exceeds the reference value of 150 kPa, the control unit 11 determines that the operation is within a normal range, If it is less than the reference value, it can be determined that it is out of the normal range.

In addition, when the data for determining whether the high compression ratio or the low compression ratio is stable during the cooling operation of the compressor has a value between 2.0 and 7.0, which is a reference range, the control unit 11 determines that the operation is within a normal range, and the reference range If it is less than (low compression ratio) or above the reference range (high compression ratio), it may be determined that it is out of the normal range.

In addition, the control unit 11, when the detection data of the temperature sensor provided to determine whether the discharge temperature is stable during the cooling operation of the compressor, is less than a reference value of 110 ° C., it is determined that the operation is within a normal range, the reference value If it is exceeded, it can be judged to be outside the normal range.

In addition, the above-described reference value is called a primary reference value, and the primary reference value or reference range may be previously stored in the storage means 15 .

Meanwhile, the sensed data having a value outside the preset normal range is called abnormal data, and the operation performed while the abnormal data exists is called an abnormal driving state.

As a result of the determination of the control unit 11, when the operation cycle of the refrigeration and air conditioning system operates within a normal range, the control unit 11 may control to output a normal state result screen to the display unit 13, The display unit 13 may provide a screen indicating that the driving cycle is in a normal state. (S40)

On the other hand, if the operation cycle of the refrigeration and air conditioning system is out of the normal range as a result of the determination of the control unit 11, the control unit 11 may determine whether the current operation cycle belongs to the dangerous range or the warning range. There is (S50)

And, whether the current driving cycle belongs to the dangerous range or the warning range, it may be determined according to a criterion stored in advance in the storage means (15).

For example, when the detection data of the pressure sensor provided to determine whether the high pressure is stable during the cooling and heating operation of the above-described compressor exceeds the reference value of 3480 kPa, the control unit 11 may be configured as a secondary reference value of 3775 (unit, kPa) If it is less than, it can be determined that it belongs to the warning range, and when it is higher than the second reference value, it can be determined that it belongs to the danger range.

In addition, the control unit 11, the secondary reference value 110 (unit is, kPa) if it is exceeded, it may be determined that it belongs to the warning range, and if it is less than the second reference value, it may be determined that it belongs to the danger range.

In addition, when the data for determining whether the high compression ratio or the low compression ratio is stable during the cooling operation of the compressor is greater than or equal to the primary reference range (2.0 to 7.0), the control unit 11 is less than the secondary reference value of 9.6. It is determined that it belongs to, and if it is higher than the second reference value, it is determined that it belongs to the risk range.

In addition, the control unit 11, when the data for determining whether the high compression ratio or the low compression ratio is stable during the cooling operation of the compressor is less than or equal to the primary reference range (2.0 to 7.0), when the secondary reference value exceeds 1.6 It is determined that it falls within the elapsed range, and if it is less than the secondary reference value, it is determined that it falls within the risk range.

In addition, the control unit 11, when the detection data of the temperature sensor provided to determine whether the discharge temperature is stable during the cooling operation of the compressor exceeds a reference value of 110°C, when the secondary reference value is less than 113°C is determined to be within the warning range, and if it is greater than or equal to the secondary reference value, it is determined to be within the dangerous range.

In addition, the above-described secondary reference value or secondary reference range may be stored in advance in the storage means 15 .

The control unit 11 may control to output a dangerous state on the screen of the display unit 13 when the current driving cycle belongs to a dangerous range, and the display unit 13 provides a screen indicating that the driving cycle is in a dangerous state You can. (S60)

In addition, the control unit 11 may control to output a warning state on the screen of the display unit 13 when the current operation cycle falls within a warning range, and the display unit 13 displays a screen indicating that the operation cycle is in a warning state. (S70)

The display unit 13 may provide different colors when providing the screen indicating the dangerous state or the warning state. That is, the controller 11 may control the screen color of the data corresponding to the danger or warning range to be changed according to whether the driving cycle is in a dangerous state or a warning state.

In more detail, in the output screen provided to the display unit 13 , a data screen belonging to a warning range may be provided in yellow, and a data screen belonging to a risk range may be provided in red. For example, referring to FIG. 7 , since the data of the current high pressure and the current low pressure belong to the warning range, the color of the data screen 131a of the current high pressure and the current low pressure may be provided in yellow. And, since the data of the compression ratio falls within the dangerous range, the color of the data screen 131b displaying the compression ratio may be provided in red.

Meanwhile, the control unit 11 may determine a cause candidate group for abnormal data belonging to a danger or warning range and control to be output to the display unit 13. (S80) Here, the cause candidate corresponding to the abnormal data Criteria for determining the group may be stored in advance in the storage means (15).

For example, when it is determined that the operation is out of the normal range in the determination of whether the compression ratio is stable or not, the control unit 11 may check the type of data that may affect the compression ratio from the storage means 15 . Here, the type of data that may affect the compression ratio may include a valve of a bypass pipe connected to the indoor unit, an indoor unit expansion device, and the like.

In addition, the control unit 11 may check whether the detected data value for each type of data is different from a preset comparison reference value. Thereafter, the control unit 11 may determine a cause candidate group based on the confirmation result.

The control unit 11 may determine a probabilistic priority for each cause among the cause candidate group, and control it to be output to the display unit 13 . For example, when it is determined that the detection data for the valve of the bypass pipe connected to the indoor unit and the indoor unit expansion device are the same as the comparison reference value, the control unit 11 sets the cause candidate group to a refrigerant shortage or a refrigerant leak. , determined by EEV blockage, and calculating a probabilistic priority for each cause candidate can be provided together.

The probabilistic priority means a priority determined according to a probability value indicating a possibility that the cause candidate group corresponds to an abnormal cause of the driving cycle. Accordingly, each cause candidate among the cause candidate group has a probability value corresponding to the cause of the abnormal (abnormal driving) of the driving cycle, and the priority among the cause candidates may be determined according to the probability value.

Referring to FIG. 7 , on the display screen 130 output to the display unit 13 , the diagnosis result screen 150 displaying the cause candidate group may be activated and provided as a new (pop-up) window.

In addition, the diagnosis result screen 150 may provide a cause candidate group to which a probabilistic priority is applied such as refrigerant shortage (60%), other refrigerant leakage (15%), and EEV blockage (8%).

In addition, the control unit 11 may control the operation manual for the abnormal operation to be output to the display unit 13 separately from providing the cause candidate group. For example, when the administrator selects an action manual screen other than the cause candidate group screen through the input unit 14 of the diagnosis device 10, the display unit 13 displays the diagnosis screen 150 as an action manual screen (not shown). ) can be activated and provided.

The action manual may be defined as providing major check items for abnormal data in order of importance. As an example, when it is determined that the data in the pressure sensor provided for determining whether the high pressure of the compressor is stable or not is in a warning or dangerous state, the action manual screen includes a pipe leak check, a crack part check, etc. in the first check item menu In the 2nd check item menu, outdoor fan RPM check during cooling operation, indoor fan RPM check during heating operation, etc. can be suggested in the 2nd check item menu can be presented.

Meanwhile, the method for diagnosing a refrigeration and air conditioning system according to an embodiment of the present invention may further include an action step (S90) of determining and performing an action according to the suggested cause candidate group.

The action step S90 may be understood as a step in which an engineer (manager) selects the most suitable cause as the cause of the current abnormal operation from among the cause candidate group and performs the corresponding action. For example, when the engineer (administrator) determines that the data in the pressure sensor provided for determining whether the high pressure of the compressor is stable or not is in a warning or dangerous state, the cause of the shortage of refrigerant among the cause candidate group presented in the diagnosis device 10 It can be determined that this is the most suitable cause, and accordingly, a refrigerant charging action can be performed.

On the other hand, there may be a case in which an actual cause is not presented among the cause candidate groups provided by the diagnosis apparatus 10 . That is, there may be a case where an engineer (manager) managing the refrigeration and air conditioning system may determine that an actual cause is not provided from among the candidate causes suggested by the diagnosis device 10 .

At this time, the intuitive judgment of the engineer (manager) should be reflected in the action. And, if the above action is a correct action, the corresponding action is stored and the diagnostic accuracy will be improved if the diagnostic device 10 is used for the same sensed data analysis thereafter.

In this regard, the action step (S90) will be described in detail below with reference to FIG. 6 .

The action step (S90) may include an action content input step (S100).

In the action content input step S100 , the control unit 11 may receive the action content input through the input unit 14 . For example, the engineer (administrator) may select or input the action details according to the cause of the abnormality through the input unit 14 of the diagnosis device 10 .

And, the action step (S90) may further include a cause candidate matching step (S110) of determining whether the action content matches the action corresponding to the suggested cause candidate group.

That is, the control unit 11 may determine whether the action content input through the input unit 14 is an action for any one of the suggested cause candidate groups. Here, the action content candidates that can be taken according to each abnormal cause among the suggested cause candidate groups may be stored in advance as a table in the storage means 15 .

For example, the engineer (administrator) may select or input a refrigerant charging measure through the input unit 14 as a measure for refrigerant shortage, which is one of the suggested cause candidate groups. In this case, the control unit 11 may determine whether a refrigerant charging measure exists among the measures for the shortage of refrigerant stored in the storage means 15 .

If it is determined that the action corresponding to any one of the suggested cause candidate groups matches, the control unit 11 may match the action details with the cause and store it in the storage means 15. (S120) For example, , if there is a refrigerant charging action among the action candidates for the refrigerant shortage, the control unit 11 may match and store the refrigerant charging measure and the refrigerant shortage as the cause.

On the other hand, if it is determined that the action does not match the action corresponding to any one of the suggested cause candidate groups, the control unit 11 registers the action details in the action content candidates for the corresponding cause and stores the action details in the storage means 15 . (S130) The control unit 11 may match the action details stored in the action details candidates with the corresponding cause and store them in the storage means 15. (S120) As an example, If there is no refrigerant charge action among the action candidates, the control unit 11 may store the coolant charge action as a new action candidate, match the refrigerant charge action with the refrigerant shortage, which is the cause, and store it.

In addition, the action step (S90) may further include a problem solving determination step (S140) of determining whether the operation cycle of the refrigeration and air conditioning system has returned to a normal range.

The problem solving determination step (S140) may be performed by analyzing the sensed data received in real time from the driving state detection means in the same manner as the above-described cycle normality determination step (S30). (S140)

Then, when it is determined that the refrigeration and air conditioning system operation cycle has returned to normal in the problem solving determination step ( S140 ), the control unit 11 increases and stores the probabilistic weight for the cause matched with the action details. (S150)

That is, since the operation cycle is returned to the normal range because the action content input by the engineer (administrator) is suitable, the control unit 11 controls the probability value for the corresponding cause among the cause candidate group for the abnormal data in the same range. can be newly stored by adding a weight so that it can be set higher than in the prior art. For example, when an abnormal operation is detected based on abnormal data in the same range thereafter, the probability of the refrigerant shortage may be increased to 70% and displayed on the diagnosis result screen 150 . (refer to Fig. 7)

On the other hand, if it is determined that the refrigeration and air conditioning system operation cycle still falls within the abnormal range in the problem solving determination step ( S140 ), the control unit 11 reduces the probabilistic weight for the cause matched with the action details and save it. (S160)

And, since the problem of abnormal driving has not been solved, the process returns to the step of presenting the cause candidate ( S80 ) and the above-described process can be repeated. For example, in the cause candidate presentation step ( S80 ), the refrigerant shortage probability on the diagnosis result screen 150 may be reduced from 60% to 20% and displayed. Therefore, the engineer (manager) can prioritize other causes among the suggested cause groups and perform related actions.

In summary, according to the result of the problem solving determination step ( S140 ), the probability value of the suggested cause candidate group is changed, and accordingly, the priority among the cause candidates can be changed. According to this, there is an advantage in that it is possible to induce more accurate and rapid problem solving when the same problem occurs later by accumulating data according to diagnosis.

Referring to FIGS. 7 and 8 , on the display screen 130 provided by the display unit 13 of the diagnosis apparatus 10 , the diagnosis result screen 150 providing the cause candidate group and the input and cycle diagnosis screen 131 are displayed. ), indoor unit diagnosis screen 132, valve diagnosis screen 133, system limitation diagnosis screen 134, actuator diagnosis screen 135, sensor and electric field diagnosis screen 136, and state graph screen 137. there is.

The input and cycle diagnosis screen 131 may provide real-time sensing data received from the relevant operation state detection means to determine the compression ratio of the compressor, whether high pressure is stable, whether low pressure is stable, and the like.

The indoor unit diagnosis screen 132 may provide information for checking the indoor unit pipe temperature, the state of the electronic expansion device, and the like in real time.

The valve diagnosis screen 133 may provide information for checking the status of the four-way valve, the hot gas valve, and the like in real time.

In the system limitation diagnosis screen 134, information for checking overload, overcurrent, overvoltage, etc. of the compressor may be provided in real time.

The actuator diagnosis screen 135 may provide information for checking the state of various devices, such as the configuration of an indoor unit, an oil separator, a fan, an intercooler, and a supercooler, in real time.

The sensor and electric field diagnosis screen 136 may receive and check in real time detection data of various sensors such as air temperature, condensation temperature, evaporation temperature, and heat exchanger temperature, that is, the operation state detection means.

The state graph screen 137 may provide information for checking the operating state of the outdoor fan, etc. in real time according to criteria such as pressure, frequency, and rotation speed.

In addition, the display screen 130 may include a driving information screen 141 , a product information screen 142 , a field information screen 143 , and a communication connection screen 144 .

The operation information screen 141 may provide information so that it can be checked whether the current operation mode is a cooling or heating mode. And, it is possible to check the unit of data received from the driving state detection means.

The product information screen 142 may provide information for confirming the specifications of the refrigeration and air conditioning system connected to the vibration device 10 .

The on-site information screen 143 may provide information for confirming the installation location of the refrigeration and air conditioning system, ownership information, model information, and the like.

The communication connection screen 144 may provide information for checking the connection state of the communication means 12 of the diagnosis apparatus 10 in real time.

Meanwhile, referring to FIG. 8 , the order of updating information in real time for each screen provided on the display screen 130 of the diagnosis apparatus 10 may be predetermined. That is, the order of updating information on each screen displayed on the display screen 130 may be predetermined.

The diagnosis apparatus 10 may exchange real-time related data through a communication connection, and provide it to the display screen 130 of the display unit 13 . However, since transmitting and receiving sensing data for a complex configuration of the refrigeration and air conditioning system in real time means processing a large amount of data, the design specification of the diagnosis apparatus 10 may be increased. Accordingly, economic problems such as an increase in production cost may occur.

In order to solve the above-described problem, the diagnosis apparatus 10 may predetermine the order of data update for each screen provided on the display screen 130 . For example, after the data of the pressure and cycle diagnosis screen 131 is updated, the data of the indoor unit diagnosis screen 132 is updated, and thereafter, the valve diagnosis screen 133, the system limit diagnosis screen 134, and the actuator are updated. The data may be updated in the order of the diagnosis screen 135 and the sensor and battlefield diagnosis screen 136 .

Accordingly, the processing speed can be improved by lowering the share of the central processing unit (CPU) of the diagnostic apparatus 10, and power consumption is reduced, so that the diagnostic algorithm can be performed even with a relatively low specification. Furthermore, there is an effect that the production cost of the diagnostic device 10 can be reduced inexpensively.

On the other hand, according to the refrigeration and air conditioning system and its diagnosis method according to an embodiment of the present invention, there is an advantage in that it is possible to uniformly determine whether the cycle operation is abnormal through the diagnosis screen of the diagnosis apparatus 10 . In addition, there is an advantage that more optimal measures can be taken quickly because candidate groups for abnormal causes of driving are provided by priority. In addition, since the optimal action plan for the cause of the abnormality can be suggested to the manager, the accuracy and convenience of the action can be improved. In addition, since the priority of the abnormal cause candidate group provided by the diagnosis apparatus 10 is continuously updated according to data accumulation, the accuracy of the diagnosis result can be improved.

10: diagnostic device 20: outdoor unit
30: indoor unit

Claims (21)

outdoor unit;
an indoor unit that uses the outdoor unit in common and is provided in a plurality of types;
a converter provided for compatibility between the indoor unit provided in the plurality of types and the outdoor unit;
a driving state detection means provided in the outdoor unit and the indoor unit; and
and a diagnostic device for receiving detection data from the driving state detection means and determining whether there is an abnormal state in the driving cycle,
The diagnostic device is
If there is an abnormal state in the driving cycle, the cause candidate group for the abnormality is provided by applying priority according to the probability value,
The refrigeration and air conditioning system, characterized in that the probability value of the cause candidate group can be increased or decreased as the determination of the presence or absence of an abnormal state in the driving cycle is accumulated.
delete outdoor unit;
an indoor unit that uses the outdoor unit in common and is provided in a plurality of types;
a converter provided for compatibility between the indoor unit provided in the plurality of types and the outdoor unit;
a driving state detection means provided in the outdoor unit and the indoor unit; and
It is determined whether there is an abnormal state in the driving cycle by receiving the sensing data from the driving state detection means,
and a diagnostic device for providing, when the driving cycle is in an abnormal state, by applying a priority to the cause candidate group for the abnormality according to a probability value,
The diagnostic device is
control,
storage means for storing information;
a display unit capable of providing the cause candidate group on a screen; and
Refrigeration and air conditioning system further comprising an input unit capable of inputting action details for at least one cause candidate among the cause candidate group.
delete 4. The method of claim 3,
The control unit, refrigeration and air conditioning system, characterized in that the stored in the storage means by matching the input action details and the cause candidate.
6. The method of claim 5,
The control unit, refrigeration and air conditioning system, characterized in that the increase or decrease of the probability value for the matched cause candidate according to the judgment result of the abnormal state of the driving cycle
4. The method of claim 3,
The control unit, refrigeration and air conditioning system, characterized in that when the detection data is out of a first reference range stored in the storage means in advance, it characterized in that for determining the operation cycle as an abnormal state.

8. The method of claim 7,
The control unit is
When it is determined that the operation cycle is an abnormal state, the refrigeration and air conditioning system, characterized in that it is classified into a dangerous state or a warning state based on a second reference range previously stored in the storage means.
In the refrigeration and air conditioning system provided with an outdoor unit, a plurality of indoor units provided in a type that performs at least one function of refrigeration, freezing, cooling and heating, and a diagnostic device for diagnosing operating states of the indoor unit and the outdoor unit,
receiving data from driving state detection means provided in the outdoor unit and the indoor unit;
determining whether a driving cycle is normal based on the received data;
If it is determined that the driving cycle is abnormal, providing a cause candidate group;
The cause candidate group is provided with a probability value indicating a possibility of corresponding to the cause of the abnormal driving cycle for each cause candidate,
The refrigeration and air conditioning system diagnosis method, characterized in that the cause candidate group is prioritized and presented according to the probability value.
delete 10. The method of claim 9,
The diagnostic device is
a control unit for processing data; and
It includes a display unit that provides a screen,
The refrigeration and air conditioning system diagnosis method, characterized in that the cause candidate group is output on the screen.
12. The method of claim 11,
On the screen of the display unit,
a display screen on which the received data is output in real time; and
A refrigeration and air conditioning system diagnosis method comprising a diagnosis result screen providing the cause candidate group.

13. The method of claim 12,
The display screen is divided into a plurality of screens, and the divided screens sequentially update the received data.
10. The method of claim 9,
The step of determining whether the driving cycle is normal,
A method for diagnosing a refrigeration and air conditioning system, characterized in that the determination is made by comparing the received data with the primary reference range previously stored in the diagnosis device.
15. The method of claim 14,
When the received data is out of the primary reference range, the refrigeration and air conditioning system diagnosis method further comprising a risk determination step of determining whether a dangerous state or a warning state.
16. The method of claim 15,
In the risk determination step, if it falls within a pre-stored secondary reference range, it is determined as a warning state, and if it is out of the secondary reference range, it is determined as a dangerous state.
17. The method of claim 16,
The warning state and the dangerous state are displayed in different colors through the diagnosis device.
10. The method of claim 9,
The diagnosis device is a refrigeration and air conditioning system diagnosis method, characterized in that providing an action manual when it is determined that the operation cycle is abnormal;
10. The method of claim 9,
inputting action details for the abnormal driving cycle;
matching a cause candidate corresponding to the input action information from among the cause candidate group; and
Refrigeration and air conditioning system diagnosis method further comprising the step of re-determining whether the operation cycle is normal.
20. The method of claim 19,
When the driving cycle is normal as a result of the re-judgment, the probability value for the corresponding cause candidate is increased,
If the operation cycle is abnormal as a result of the re-determination, the probability value for the corresponding cause candidate is reduced.
21. The method of claim 20,
When the probability value for the cause candidate is reduced, the method for diagnosing the refrigeration and air conditioning system, characterized in that returning to the step of providing the cause candidate group.

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