WO2022041668A1

WO2022041668A1 - Self-checking method and device for branch box, storage medium, and branch box

Info

Publication number: WO2022041668A1
Application number: PCT/CN2021/077725
Authority: WO
Inventors: 黄志刚; 邹俊立; 刘记
Original assignee: 广东美的制冷设备有限公司
Priority date: 2020-08-25
Filing date: 2021-02-24
Publication date: 2022-03-03
Also published as: CN114110910A

Abstract

A self-checking method and device for a branch box (200), a storage medium, and the branch box (200). The method comprises: when receiving a self-checking command, obtaining current temperatures of indoor heat exchangers (3001) connected to the branch box (200), and constructing a current temperature set according to the current temperatures of the indoor heat exchangers (3001) (S10); adjusting the degrees of opening of throttling devices in the branch box (200) according to preset adjustment parameters, obtaining reference temperatures of the indoor heat exchangers (3001) after the adjustment of the degrees of opening, and constructing a reference temperature set according to the reference temperatures of the indoor heat exchangers (3001) (S20); comparing the current temperature set with the reference temperature set to obtain a comparison result (S30); and determining a self-checking result of the branch box (200) according to the comparison result (S40).

Description

Branch box self-checking method, device, storage medium and branch box

This application claims the priority of the Chinese patent application filed with the China Patent Office on August 25, 2020, the application number is 202010867258.7, and the application name is "Self-inspection method, device, storage medium and branch box for branch box". The entire contents of this application are incorporated by reference.

technical field

The present application relates to the technical field of air conditioners, and in particular, to a branch box self-checking method, device, storage medium and branch box.

Background technique

In a multi-connected air-conditioning system, the branch box can be connected to multiple indoor units. Due to the complexity of wiring and connecting pipes, there is a risk of wrong pipeline connection, which will cause the air-conditioning system to fail to operate normally. However, in the prior art, automatic self-checking of the connection state between the branch box and the internal unit cannot be performed.

The above content is only used to assist the understanding of the technical solutions of the present application, and does not mean that the above content is the prior art.

technical problem

The main purpose of the present application is to provide a method, device, storage medium and branch box for self-inspection of the branch box, which aims to solve the technical problem in the prior art that the connection relationship between the branch box and the pipeline of the internal unit cannot be self-inspected.

technical solutions

In order to achieve the above purpose, the present application provides a method for self-inspection of a branch box, and the method for self-inspection of a branch box comprises the following steps:

After receiving the self-check command, obtain the current temperature of each indoor heat exchanger connected to the branch box, and construct a current temperature set according to the current temperature of each indoor heat exchanger;

Adjust the opening degree of the throttling device in the branch box according to the preset adjustment parameter, obtain the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and construct a reference temperature set according to the reference temperature of each indoor heat exchanger;

Comparing the current temperature set with the reference temperature set to obtain a comparison result; and,

The self-check result of the divergence box is determined according to the comparison result.

Optionally, the step of determining the self-check result of the divergence box according to the comparison result includes:

Determine the connection state of the throttle device according to the comparison result; and,

The self-checking result of the branch box is determined according to the connection state of the throttling device.

Optionally, the step of determining the connection state of the throttling device according to the comparison result includes:

Determine that the comparison result is that the target reference temperature in the reference temperature set is smaller than the target current temperature corresponding to the current temperature set, and calculate the temperature difference between each target reference temperature and the corresponding target current temperature;

determining whether each temperature difference is greater than a preset temperature threshold; and,

When it is determined that there is a target temperature difference value greater than the preset temperature threshold value among the temperature difference values, it is determined that the connection state of the throttling device is a connection successful state.

Optionally, the step of determining that the connection state of the throttling device is a successful connection state when it is determined that there is a target temperature difference value greater than the preset temperature threshold value in the temperature difference values includes:

determining that there is a target temperature difference value greater than the preset temperature threshold value in each of the temperature difference values, and obtaining the number of the target temperature difference values;

judging whether the quantity of the target temperature difference is less than a preset threshold; and,

When it is determined that the number of the target temperature difference is less than the preset threshold, it is determined that the connection state of the throttle device is a connection successful state.

Optionally, the connection state includes a successful connection state, and the step of determining the self-check result of the branch box according to the connection state of the throttling device includes:

Acquiring the number of target throttling devices whose connection state is a successful connection state in each throttling device in each of the branch boxes;

acquiring the number of each indoor heat exchanger, and determining that the number of each indoor heat exchanger is equal to the number of the target throttling device; and,

When it is determined that the number of the indoor heat exchangers is equal to the number of the target throttling devices, it is determined that the self-inspection result of the branch box is a qualified self-inspection.

Optionally, the step of receiving the self-check command, acquiring the current temperature of each indoor heat exchanger connected to the branch box, and constructing a current temperature set according to the current temperature of each indoor heat exchanger, includes:

Upon receiving the self-check command, close each throttling device in the branch box; and,

After each throttling device is closed, the current temperature of each indoor heat exchanger connected to the branch box is acquired, and a current temperature set is constructed according to the current temperature of each indoor heat exchanger.

Optionally, after the step of determining the self-check result of the divergence box according to the comparison result, the method further includes:

Determine the current connection relationship between each throttling device in the branch box and each indoor heat exchanger according to the self-check result;

Obtain a preset connection relationship according to preset configuration parameter information, and determine whether the preset connection relationship is the same as the current connection relationship; and,

When it is determined that the preset connection relationship is different from the current connection relationship, the configuration parameter information is modified according to the current connection relationship.

In addition, in order to achieve the above purpose, the present application also proposes a branch box self-inspection device, the branch box self-inspection device includes:

a temperature acquisition module, configured to receive a self-check command, acquire the current temperature of each indoor heat exchanger connected to the branch box, and construct a current temperature set according to the current temperature of each indoor heat exchanger;

The control module is configured to adjust the opening degree of the throttling device in the branch box according to the preset adjustment parameters, and obtain the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and according to the opening degree of each indoor heat exchanger Build a reference temperature set with reference to temperature;

a comparison module configured to compare the current temperature set with the reference temperature set to obtain a comparison result; and,

The confirmation module is configured to determine the self-check result of the divergence box according to the comparison result.

In addition, in order to achieve the above object, the present application also proposes a storage medium, where a branch box self-checking program is stored on the storage medium, and when the branch box self-checking program is executed by a processor, the branch box self-checking program as described above is realized. steps of the inspection method.

In addition, in order to achieve the above object, the present application also proposes a branch box, the branch box includes: a memory, a processor, and a branch box self-checking program stored on the memory and running on the processor, so When the branch box self-check program is executed by the processor, the steps of the branch box self-check method as described above are realized.

beneficial effect

In the present application, a self-check command is received, the current temperature of each indoor heat exchanger connected to the branch box is obtained, and a current temperature set is constructed according to the current temperature of each indoor heat exchanger; the branch box is adjusted according to preset adjustment parameters The opening degree of the internal throttling device is obtained, the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and a reference temperature set is constructed according to the reference temperature of each indoor heat exchanger; the current temperature set and the The comparison is performed with reference to the temperature set to obtain a comparison result; and a self-check result of the divergence box is determined according to the comparison result. The present application adjusts the opening degree of the throttling device in the branch box, and simultaneously detects the temperature of each indoor heat exchanger connected to the branch box before and after the opening degree adjustment. By comparing the temperature before the opening adjustment and the temperature after the opening adjustment, the connection state between the branch box and the indoor heat exchanger can be judged, and the self-inspection process of the branch box can be completed.

Description of drawings

1 is a schematic structural diagram of a branch box of the hardware operating environment involved in the solution of the embodiment of the present application;

FIG. 2 is a schematic structural diagram of the air-conditioning system of the present application

FIG. 3 is a schematic flowchart of the first embodiment of the self-checking method for a branch box of the present application;

4 is a schematic flowchart of a second embodiment of a self-checking method for a branch box of the present application;

5 is a schematic flowchart of a third embodiment of the self-checking method for a branch box of the present application;

FIG. 6 is a structural block diagram of the first embodiment of the self-checking device for a branch box according to the present application.

Description of reference numbers:

标号 label	名称 name	标号 label	名称 name
100 100	室外机 The outdoor unit	200 200	分歧箱 Divergence box
2001 2001	电子膨胀阀 Electronic expansion valve	300 300	室内机组 Indoor unit
3001 3001	室内换热器 Indoor heat exchanger

The realization, functional characteristics and advantages of the purpose of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Embodiments of the present invention

It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a branch box of the hardware operating environment involved in the solution of the embodiment of the present application.

As shown in FIG. 1 , the branch box may include: a processor 1001 , such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002 , a user interface 1003 , a network interface 1004 , and a memory 1005 . Among them, the communication bus 1002 is configured to realize the connection communication between these components. The user interface 1003 may include a display screen (Display), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The wired interface of the user interface 1003 may be a USB interface in this application. Optionally, the network interface 1004 may include a standard wired interface and a wireless interface (eg, a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or may be a non-volatile memory (Non-volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001 .

Those skilled in the art can understand that the structure shown in FIG. 1 does not constitute a limitation on the branch box, and may include more or less components than the one shown, or combine some components, or arrange different components.

As shown in FIG. 1 , the memory 1005 identified as a computer storage medium may include an operating system, a network communication module, a user interface module, and a branch box self-checking program.

In the branch box self-checking device shown in FIG. 1 , the network interface 1004 is mainly configured to connect to a background server and perform data communication with the background server; the user interface 1003 is mainly configured to connect user equipment; the branch box self-check The device invokes the branch box self-checking program stored in the memory 1005 through the processor 1001, and executes the branch box self-checking method provided by the embodiment of the present application.

Referring to FIG. 2 , FIG. 2 is a schematic structural diagram of the air conditioning system of the present application.

As shown in FIG. 2 , the air conditioning system includes an outdoor unit 100, a branch box 200, and an indoor unit 300. The branch box 200 includes a plurality of electronic expansion valves 2001, and the indoor unit 300 includes a plurality of indoor units. The indoor unit has an indoor heat exchanger 3001 . The indoor heat exchanger 3001 is connected to the electronic expansion valve 2001 , and the electronic expansion valve 2001 is connected to the outdoor unit 100 . Usually, each indoor unit is installed in a different environment. Taking a home environment as an example, indoor units can be installed in areas such as the living room, master bedroom, or side bedroom.

Based on the above hardware structure, an embodiment of the branch box self-checking method of the present application is proposed.

Referring to FIG. 3 , FIG. 3 is a schematic flowchart of the first embodiment of the branch box self-checking method of the present application, and the first embodiment of the branch box self-checking method of the present application is proposed.

In the first embodiment, the self-checking method of the branch box includes the following steps:

Step S10: Receive a self-check command, obtain the current temperature of each indoor heat exchanger connected to the branch box, and construct a current temperature set according to the current temperature of each indoor heat exchanger.

It should be understood that the executive body of this embodiment is the branch box, and the branch box has functions such as data collection, data communication, and program running. Of course, it can also be other devices with similar functions, which are not limited in this embodiment.

It should be noted that the self-check command can be initiated by the slave outdoor unit. When the branch box receives the self-test command from the outdoor unit, it will end all current processes and enter the self-test. During the self-checking process, the branch box sends a "self-checking" sign to the outdoor unit. At the same time, after the self-test is completed, a "self-test complete" flag is sent, and the self-test result is saved in the local chip parameters. Of course, the initiation of the self-check command may also be in other manners, such as initiation by the branch box itself, which is not limited in this embodiment.

It should be noted that, if the branch box cannot communicate with the local chip, the branch box will send a self-check fault flag to remind the operator that there is a fault in the air conditioning system. In addition, if any branch box fails to complete the self-test within a certain period of time (which can be timed by the outdoor unit), the outdoor unit will forcefully end the self-test process, and the branch box will send a "self-test failure" flag. When the outdoor unit receives the self-check failure status of any branch box, it sends all the internal units of the branch box to shut down and exit the self-check.

It is understandable that there are usually multiple indoor units connected to the branch box. Taking an ordinary home environment as an example, the living room, the master bedroom or the side bedroom are all equipped with indoor units, so the branch box is connected to three indoor units. During self-inspection, it is impossible to directly determine which indoor unit is connected to the throttle device in the branch box, that is, the throttle device a may be connected to the indoor unit of the master bedroom, or it may be connected to the indoor unit of the side bedroom. Therefore, when the throttling device a is detected, only the temperature of all connected indoor units can be obtained, and further, the temperature of the indoor heat exchanger can be obtained. That is, the temperature A1 of the indoor heat exchanger in the living room, the temperature B1 of the heat exchanger in the master bedroom, and the temperature C1 of the heat exchanger in the side bedroom are obtained respectively, and a temperature set X={A1, B1, C1} is created at the same time.

It should be noted that the current temperature refers to the temperature value of the indoor heat exchanger detected when the branch box receives the self-check command. A temperature sensing bulb is arranged in the central area of the indoor heat exchanger, and the temperature sensing bulb is configured to detect the temperature value of the indoor heat exchanger. At the same time, the branch box and the indoor heat exchanger are also connected through a data line to receive the temperature value detected by the temperature sensing package. When the branch box cannot obtain the temperature value, it means that the temperature sensor package may be faulty, and the branch box sends a self-check fault flag to remind the operator that there is a fault in the air conditioning system and needs to be dealt with. At the same time, when the indoor and outdoor or branch box protection fault stops, the fault code is displayed and the self-test is exited. After the fault is cleared, the self-test can be continued.

It should be noted that, in order to detect more accurately, it is necessary to make the temperature value of each indoor heat exchanger reflect the same change state, so it is necessary to ensure that the operation state of each indoor unit is the same. For example, make all indoor units enter the forced cooling mode, when there is an indoor unit in the forced defrosting mode, turn off the indoor unit, and then enter the forced cooling mode.

Step S20: Adjust the opening degree of the throttling device in the branch box according to the preset adjustment parameters, obtain the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and construct the reference temperature according to the reference temperature of each indoor heat exchanger set.

It should be noted that, referring to FIG. 2 , the throttling device may refer to the electronic expansion valve 2001 , and the opening degree of the electronic expansion valve 2001 is usually represented by the number of steps, and the greater the number of steps, the greater the opening degree. The preset adjustment parameter refers to the preset adjustment steps, and the opening degree of the electronic expansion valve 2001 is adjusted according to the preset adjustment steps, thereby adjusting the temperature of the indoor heat exchange. The preset number of adjustment steps may be 250 steps or 300 steps, which is not limited in this embodiment.

It can be understood that after the opening degree of the electronic expansion valve 2001 changes, the temperature of the corresponding indoor heat exchanger will also change. At this time, the reference temperature A2 of the indoor heat exchanger in the living room and the reference temperature of the heat exchanger in the master bedroom are recorded. Temperature B2 and reference temperature C2 of the heat exchanger in the side bedroom, while creating a reference temperature set Y={A2, B2, C2}.

It should be noted that, in order to make the detected temperature more accurate, after the opening of the electronic expansion valve 2001 is adjusted, the temperature of the indoor heat exchanger is collected after standing for a period of time. Specifically, it can be left to stand for 40s or 60s after the opening degree is adjusted, and the specific time can be set by the operator according to requirements, which is not limited in this embodiment.

Step S30: Compare the current temperature set with the reference temperature set to obtain a comparison result.

It should be noted that comparing the current temperature set with the reference temperature set refers to comparing the temperature values in the current temperature set with the corresponding temperature values in the reference temperature set respectively. For example, compare the current temperature A1 of the heat exchanger in the living room with the reference temperature A2, compare the current temperature B1 of the heat exchanger in the master bedroom with the reference temperature B2, and compare the current temperature of the heat exchanger in the side bedroom C1 is compared to the reference temperature C2.

It can be understood that the comparison result includes the temperature and temperature difference of each indoor heat exchanger before and after the opening degree adjustment, or the number of indoor heat exchangers whose temperature changes.

Step S40: Determine the self-check result of the divergence box according to the comparison result.

It should be noted that the self-check result is the connection relationship between the branch box and the indoor unit. The connection relationship may include whether to connect and the specific indoor heat exchanger to be connected. The connection relationship can be determined according to the above comparison results. For example, if the temperature of the indoor heat exchanger corresponding to the current temperature set and the reference temperature set does not change, it means that the electronic expansion valve in the branch box may not be connected to the indoor heat exchange; If the temperature of the heat exchanger changes, it means that the electronic expansion valve in the branch tank is connected to the indoor heat exchanger. Thereby, the self-check result of the branch box can be obtained.

It should be noted that judging whether the temperature of the indoor heat exchanger has changed may be judging whether the current temperature of the indoor heat exchanger is equal to the reference temperature. Of course, judging whether the temperature of the indoor heat exchanger has changed may also be judging whether the difference between the current temperature of the indoor heat exchanger and the reference temperature exceeds a preset threshold. For example, if the threshold is set to 8°C, if the difference between the current temperature of the indoor heat exchanger and the reference temperature is less than 8°C, there is no change, and if it is greater, there is a change.

In the first embodiment, when a self-check command is received, the current temperature of each indoor heat exchanger connected to the branch box is obtained, and a current temperature set is constructed according to the current temperature of each indoor heat exchanger; according to a preset Adjust parameters to adjust the opening degree of the throttling device in the branch box, obtain the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and construct a reference temperature set according to the reference temperature of each indoor heat exchanger; The temperature set is compared with the reference temperature set to obtain a comparison result; and a self-check result of the branch box is determined according to the comparison result. In this embodiment, the opening degree of the throttling device in the branch box is adjusted, and the temperature of each indoor heat exchanger connected to the branch box before and after the opening degree adjustment is detected at the same time. By comparing the temperature before the opening adjustment and the temperature after the opening adjustment, the connection state between the branch box and the indoor heat exchanger can be judged, and the self-inspection process of the branch box can be completed.

Referring to FIG. 4 , FIG. 4 is a schematic flowchart of the second embodiment of the branch box self-checking method of the present application. Based on the above-mentioned first embodiment, a second embodiment of the branch box self-checking method of the present application is proposed.

In the second embodiment, the step S40 includes:

Step S401: Determine the connection state of the throttle device according to the comparison result.

It should be noted that the connection relationship may include whether to connect and the specific indoor heat exchanger to be connected, and the connection relationship can be determined according to the above comparison result. For example, if the temperature of the indoor heat exchanger corresponding to the current temperature set and the reference temperature set has not changed, it means that the electronic expansion valve in the branch box may not be connected to the indoor heat exchange; If the temperature of the heat exchanger changes, it means that the electronic expansion valve in the branch tank is connected to the indoor heat exchanger.

In a specific implementation, the step of determining the connection state of the throttling device according to the comparison result includes: determining that the comparison result is that there is a target reference temperature in the reference temperature set that is lower than a target corresponding to the current temperature set For the current temperature, calculate the temperature difference between each target reference temperature and the corresponding target current temperature; determine whether each temperature difference is greater than a preset temperature threshold; and determine whether the temperature difference is greater than the preset temperature When the target temperature difference of the threshold value is reached, it is determined that the connection state of the throttle device is a connection successful state.

It should be noted that, in this embodiment, the indoor unit implements the self-checking process in the forced cooling mode for description. After adjusting the opening degree of the throttling device, specifically increase the opening degree, if the temperature of the indoor heat exchanger drops, it means that the input low-pressure liquid flow rate of the indoor heat exchanger becomes larger, and the adjustment of the throttling device is effective, it means that The indoor heat exchange air is connected to the throttling device; if the temperature of the indoor heat exchanger does not drop, it means that the throttling device is not connected to the indoor heat exchanger. The connection success status means that the throttling device has been connected to the indoor heat exchanger.

It should be noted that, in order to ensure the validity of the foregoing judgment, it is necessary to ensure that the change of the indoor heat exchanger is only controlled by the throttling device. Usually, the throttling device can only be connected to one indoor heat exchanger. Therefore, when the throttling device is adjusted, the temperature of at most one indoor heat exchanger changes.

In a specific implementation, the step of determining that there is a target temperature difference value greater than the preset temperature threshold value among the temperature difference values, and judging that the connection state of the throttling device is a connection successful state, includes: determining the When there is a target temperature difference value greater than the preset temperature threshold value in each temperature difference value, obtain the quantity of the target temperature difference value; determine whether the quantity of the target temperature difference value is smaller than the preset threshold value; and, determine the When the number of target temperature differences is less than the preset threshold, it is determined that the connection state of the throttle device is a connection successful state.

It should be noted that for indoor heat exchangers without flow control, it is usually difficult to maintain a constant temperature, but the temperature fluctuations will not be too large. Therefore, there may be multiple temperature differences in the comparison results. For example, the temperature difference between the current temperature A1 of the indoor heat exchanger in the living room and the reference temperature A2 is 0.5°C, and the current temperature B1 of the heat exchanger in the master bedroom is different from the reference temperature A2. The temperature difference between the temperatures B2 is 0.3°C, and the temperature difference between the current temperature C1 of the heat exchanger in the side bedroom and the reference temperature C2 is 8°C. Explain that the throttling device is connected to the heat exchanger in the side bedroom.

It is understandable that under special circumstances, such as the loosening of the throttling device, the comparison result may also be that the temperature difference between the current temperature A1 of the indoor heat exchanger in the living room and the reference temperature A2 is 0.5°C, and the heat exchange in the master bedroom is 0.5°C. The temperature difference between the current temperature B1 of the heat exchanger and the reference temperature B2 is 8.5°C, and the temperature difference between the current temperature C1 and the reference temperature C2 of the heat exchanger in the side bedroom is 8°C. At this time, it cannot be determined whether the throttle device is connected to the heat exchanger in the master bedroom or the heat exchanger in the side bedroom. At this time, it can be considered that there is a problem with the pipeline or valve body, and the branch box sends a self-check fault flag to remind the operator that there is a fault in the air conditioning system and needs to be dealt with. After the fault is cleared, the self-test can continue.

Step S402: Determine the self-check result of the branch box according to the connection state of the throttle device.

It should be noted that, usually, there are multiple throttling devices in the branch box. In order to more completely determine the state of the entire branch box, it is necessary to explain that the connection state of each throttling device in the branch box is determined separately, so as to judge the overall self-inspection of the branch box. result. In the present embodiment, the connection state of each throttle device in the branch box is detected as described above.

In a specific implementation, the step of determining the self-checking result of the branch box according to the connection state of the throttling device includes: acquiring a target that the connection state of each throttling device in the branch box is a successful connection state the number of throttling devices; obtain the number of each indoor heat exchanger, and determine whether the number of each indoor heat exchanger is equal to the number of the target throttling device; and, determine the number of each indoor heat exchanger When the number is equal to the number of the target throttling devices, it is determined that the self-test result of the branch box is qualified.

It should be noted that, taking an ordinary home environment as an example, the indoor unit may be set in a living room, a master bedroom or a side bedroom, that is, the number of indoor units is 3. However, there may be 5 throttling devices in the branch box. That is to say, according to the above judgment method, the connection status of at most three throttle devices in the branch box is the connection successful state, and the connection status of the remaining two throttle devices is the connection failure state. However, since the number of indoor units is 3, there is no problem in the connection status of the branch box. Therefore, the self-check result of the branch box also needs to be judged in combination with the number of connected indoor heat exchangers.

In the second embodiment, the connection state of all the throttling devices in the branch box is detected, and the number of the throttling devices that have been successfully connected is compared with the number of connected indoor heat exchangers to determine the overall size of the branch box. Self-test results. In addition, when testing the throttling device, it is determined that there is a problem with the pipeline or valve body according to the temperature change of the indoor heat exchanger. If there is a problem, a self-test fault will be reported to ensure the validity of the test results.

Referring to FIG. 5 , FIG. 5 is a schematic flowchart of the third embodiment of the branch box self-checking method of the present application. Based on the above-mentioned first and second embodiments, a third embodiment of the branch box self-checking method of the present application is proposed. This embodiment will be described based on the first embodiment.

In the third embodiment, step S10 includes:

S101: Receive a self-check command, and close each throttling device in the branch box.

It should be noted that, in order to further make the detection more rapid and accurate, the temperature change range of the indoor heat exchanger before and after the throttle device is adjusted can be increased. Therefore, in the present embodiment, when the self-check command is received, each throttle device in the branch box is closed. The heat exchange function of the indoor heat exchanger is suspended, so that the temperature change of the indoor heat exchanger is more obvious after the throttling device is opened.

In the specific implementation, when the branch box receives the self-check command, the opening degree of all the electronic expansion valves is set to 0 steps to close the electronic expansion valves. If it is detected that the opening degree of the electronic expansion valve cannot reach step 0, it means that the electronic expansion valve is faulty, and the manifold box sends a self-check fault flag to remind the operator that there is a fault in the air conditioning system and needs to be dealt with. After the fault is cleared, continue with the self-test.

S102: After each throttling device is turned off, obtain the current temperature of each indoor heat exchanger connected to the branch box, and construct a current temperature set according to the current temperature of each indoor heat exchanger.

It should be noted that, since the indoor heat exchanger is in a running state before the throttling device is closed, the temperature of the indoor heat exchanger will change when the throttling device is closed. Therefore, it is necessary to wait for the temperature of the outdoor heat exchanger to stabilize before obtaining the current temperature. Specifically, the waiting time may be 60S or 100S.

In the third embodiment, after step S40, it further includes:

S50: Determine the current connection relationship between each throttling device in the branch box and each of the indoor heat exchangers according to the self-check result.

It should be noted that, while judging that the throttle device is successfully connected, the specific indoor heat exchanger to which the throttle device is connected can also be determined. For example, the indoor heat exchangers connected to the branch tank include indoor heat exchanger A, indoor heat exchanger B, and indoor heat exchanger C. When the opening degree of the throttle device A is adjusted, only the temperature change of the indoor heat exchanger B is greater than the preset threshold, indicating that the throttle device A is connected to the indoor heat exchanger B. Thus, the current connection relationship between each throttling device in the branch box and the indoor heat exchanger can be determined.

S60: Acquire a preset connection relationship according to preset configuration parameter information, and determine whether the preset connection relationship is the same as the current connection relationship.

It should be noted that, when the branch box is installed, the connection relationship between the connection throttling device and the indoor heat exchanger will be set in advance. For example, throttling device A is connected to indoor heat exchanger A, throttling device B is connected to indoor heat exchanger B, and throttling device C is connected to indoor heat exchanger C. Different configuration parameters are set for different heat exchangers. For example, throttling device A corresponds to configuration parameter A, throttling device B corresponds to configuration parameter B, and throttling device C corresponds to configuration parameter C. Ensuring the correct connection relationship is also a prerequisite for ensuring the stable operation of the air conditioning system.

It is understandable that the actual connection relationship is different from the preset connection because the installer may inadvertently make the connection relationship wrong. The actual connection relationship is the current connection relationship between each throttling device in the branch box and each of the indoor heat exchangers determined according to the self-check result. For example, the current connection relationship is that the throttle device A is connected to the indoor heat exchanger B, the throttle device B is connected to the indoor heat exchanger C, and the throttle device C is connected to the indoor heat exchanger A.

S70: When it is determined that the preset connection relationship is different from the current connection relationship, modify the configuration parameter information according to the current connection relationship.

It should be noted that, if the preset connection relationship is not the same as the current connection relationship, it means that an error occurs during the operation of the air-conditioning system, and therefore the configuration information needs to be adjusted. Specifically, the throttling device A may correspond to the configuration parameter B, the throttling device B corresponds to the configuration parameter C, and the throttling device C corresponds to the configuration parameter A. Thus, the configuration information corresponds to the indoor heat exchanger to ensure the normal operation of the system.

In the third embodiment, before adjusting the throttling device, the throttling device is closed to suspend the operation process of the indoor heat exchanger. Therefore, after the opening degree of the throttling device is adjusted, the temperature change range of the indoor heat exchanger becomes larger, thereby improving the detection effectiveness. In addition, this embodiment also obtains the current connection relationship between each throttling device in the branch box and the indoor heat exchanger according to the self-check result, and corrects when the current connection relationship is different from the preset connection relationship to ensure the normal operation of the air conditioning system. run.

In addition, in order to achieve the above purpose, the present application also proposes a self-checking device for a branch box. Referring to FIG. 6 , FIG. 6 is a structural block diagram of the first embodiment of the self-checking device for a branch box of the present application.

In this embodiment, the self-checking device for the branch box includes:

The temperature acquisition module 10 is configured to receive a self-check command, acquire the current temperature of each indoor heat exchanger connected to the branch box, and construct a current temperature set according to the current temperature of each indoor heat exchanger.

It should be noted that the self-check command can be initiated by the slave outdoor unit. When the temperature collection module 10 receives the self-check command of the outdoor unit, it controls the branch box to end all current processes and enter the self-check. During the self-checking process, the branch box sends a "self-checking" sign to the outdoor unit. At the same time, after the self-test is completed, a "self-test complete" flag is sent, and the self-test result is saved in the local chip parameters. Of course, the initiation of the self-check command may also be in other manners, such as initiation by the branch box itself, which is not limited in this embodiment.

It should be noted that, if the temperature acquisition module 10 cannot communicate with the local chip, the branch box sends a self-checking fault flag to alert the operator that the air conditioning system is faulty. In addition, if any branch box fails to complete the self-test within a certain period of time (which can be timed by the outdoor unit), the outdoor unit will forcefully end the self-test process, and the branch box will send a "self-test failure" flag. When the outdoor unit receives the self-check failure status of any branch box, it sends all the internal units of the branch box to shut down and exit the self-check.

It should be noted that the current temperature refers to the temperature value of the indoor heat exchanger detected when the branch box receives the self-check command. A temperature sensing bulb is arranged in the central area of the indoor heat exchanger, and the temperature sensing bulb is configured to detect the temperature value of the indoor heat exchanger. At the same time, the temperature acquisition module 10 is also connected to the indoor heat exchanger through a data line, and receives the temperature value detected by the temperature sensing package. When the temperature acquisition module 10 cannot obtain the temperature value, it indicates that the temperature sensing package may be faulty, and the branch box sends a self-check fault flag to remind the operator that the air conditioning system is faulty and needs to be dealt with. At the same time, when the indoor and outdoor or branch box protection fault stops, the fault code is displayed and the self-test is exited. After the fault is cleared, the self-test can be continued.

The control module 20 is configured to adjust the opening degree of the throttling device in the branch box according to the preset adjustment parameters, obtain the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and adjust the opening degree of each indoor heat exchanger according to the adjusted opening degree. The reference temperature builds a reference temperature set.

The comparison module 30 is configured to compare the current temperature set with the reference temperature set to obtain a comparison result.

The confirmation module 40 is configured to determine the self-check result of the divergence box according to the comparison result.

It should be noted that the self-check result is the connection relationship between the branch box and the indoor unit, the connection relationship may include the connection and the specific indoor heat exchanger to be connected, and the connection relationship can be determined according to the above comparison result. For example, if the temperature of the indoor heat exchanger corresponding to the current temperature set and the reference temperature set has not changed, it means that the electronic expansion valve in the branch box may not be connected to the indoor heat exchange; If the temperature of the heat exchanger changes, it means that the electronic expansion valve in the branch tank is connected to the indoor heat exchanger. Thereby, the self-check result of the branch box can be obtained.

In this embodiment, when a self-check command is received, the current temperature of each indoor heat exchanger connected to the branch box is obtained, and a current temperature set is constructed according to the current temperature of each indoor heat exchanger; according to the preset adjustment The parameter adjusts the opening degree of the throttling device in the branch box, obtains the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and constructs a reference temperature set according to the reference temperature of each indoor heat exchanger; The set is compared with the reference temperature set to obtain a comparison result; and a self-check result of the divergence box is determined according to the comparison result. In this embodiment, the opening degree of the throttling device in the branch box is adjusted, and the temperature of each indoor heat exchanger connected to the branch box before and after the opening degree adjustment is detected at the same time. By comparing the temperature before the opening adjustment and the temperature after the opening adjustment, the connection state between the branch box and the indoor heat exchanger can be judged, and the self-inspection process of the branch box can be completed.

In one embodiment, the confirmation module 40 is further configured to determine the connection state of the throttle device according to the comparison result; and to determine the self-check result of the branch box according to the connection state of the throttle device.

In one embodiment, the confirmation module 40 is further configured to calculate the target reference temperature and the corresponding target reference temperature when the comparison result is that the target reference temperature in the reference temperature set is lower than the target current temperature corresponding to the current temperature set. temperature difference between target current temperatures; determining whether each temperature difference is greater than a preset temperature threshold; and determining that when there is a target temperature difference greater than the preset temperature threshold among the temperature differences The connection state of the throttling device is the connection successful state.

In one embodiment, the confirmation module 40 is further configured to obtain the number of the target temperature difference when it is determined that there is a target temperature difference greater than the preset temperature threshold in each of the temperature differences; determine the target temperature difference; whether the number of temperature differences is less than a preset threshold; and when it is determined that the number of target temperature differences is less than the preset threshold, it is determined that the connection state of the throttling device is a successful connection state.

In one embodiment, the confirmation module 40 is further configured to obtain the number of target throttling devices in each throttling device in the branch box whose connection state is a successful connection state; obtain the number of the indoor heat exchangers, and determine whether the number of the indoor heat exchangers is equal to the number of the target throttling devices; and, when it is determined that the number of the indoor heat exchangers is equal to the number of the target throttling devices, determine the branch box The self-test result is self-test qualified.

In one embodiment, when the temperature acquisition module 10 receives the self-check command, it closes each throttling device in the branch box; and, after each throttling device is closed, acquires each indoor heat exchanger connected to the branch box. The current temperature of each indoor heat exchanger is constructed, and a current temperature set is constructed according to the current temperature of each indoor heat exchanger.

In one embodiment, the self-checking device of the branch box further includes a configuration parameter correction module, and the configuration parameter correction module is configured to determine the relationship between each throttling device in the branch box and each of the indoor heat exchangers according to the self-check result. obtain a preset connection relationship according to preset configuration parameter information, and determine whether the preset connection relationship is the same as the current connection relationship; and determine the preset connection relationship and the current connection relationship When they are not the same, the configuration parameter information is revised according to the current connection relationship.

For other embodiments or specific implementations of the apparatus for self-checking of a branch box described in the present application, reference may be made to the foregoing method embodiments, which will not be repeated here.

Since the storage medium adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or system comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or system. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system that includes the element.

The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. do not denote any order and may be interpreted as names.

From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course hardware can also be used, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence or the parts that make contributions to the prior art. The computer software products are stored in a storage medium (such as a read-only memory image (Read Only Memory). Memory image, ROM) / random access memory (Random Access Memory, RAM), magnetic disk, optical disk), including several instructions to make a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the various embodiments of the present application.

The above are only the preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied in other related technical fields , are similarly included within the scope of patent protection of this application.

Claims

A method for self-inspection of a branch box, wherein the method comprises the following steps:

After receiving the self-check command, obtain the current temperature of each indoor heat exchanger connected to the branch box, and construct a current temperature set according to the current temperature of each indoor heat exchanger;

Adjust the opening degree of the throttling device in the branch box according to the preset adjustment parameter, obtain the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and construct a reference temperature set according to the reference temperature of each indoor heat exchanger;

Comparing the current temperature set with the reference temperature set to obtain a comparison result; and,

The self-check result of the divergence box is determined according to the comparison result.
The method for self-inspection of the branched box according to claim 1, wherein the step of determining the self-inspection result of the branched box according to the comparison result comprises:

Determine the connection state of the throttle device according to the comparison result; and,

The self-checking result of the branch box is determined according to the connection state of the throttling device.
The self-checking method for a branch box according to claim 2, wherein the step of determining the connection state of the throttling device according to the comparison result comprises:

Determine that the comparison result is that the target reference temperature in the reference temperature set is smaller than the target current temperature corresponding to the current temperature set, and calculate the temperature difference between each target reference temperature and the corresponding target current temperature;

determining whether each temperature difference is greater than a preset temperature threshold; and,

When it is determined that there is a target temperature difference value greater than the preset temperature threshold value among the temperature difference values, it is determined that the connection state of the throttling device is a connection successful state.
The method for self-checking of the branch box according to claim 3, wherein when it is determined that there is a target temperature difference value greater than the preset temperature threshold value among the temperature difference values, it is determined that the connection state of the throttling device is: The steps of the connection success status include:

When it is determined that there is a target temperature difference value greater than the preset temperature threshold value in each of the temperature difference values, obtain the number of the target temperature difference values;

judging whether the quantity of the target temperature difference is less than a preset threshold; and,

When it is determined that the number of the target temperature difference is less than the preset threshold, it is determined that the connection state of the throttle device is a connection successful state.
The method for self-checking a branch box according to claim 2, wherein the connection status includes a successful connection status, and the step of determining the self-check result of the branch box according to the connection status of the throttling device comprises:

Acquiring the number of target throttling devices whose connection state is a successful connection state in each throttling device in each of the branch boxes;

acquiring the number of each indoor heat exchanger, and judging whether the number of each indoor heat exchanger is equal to the number of the target throttling device; and,

When it is determined that the number of the indoor heat exchangers is equal to the number of the target throttling devices, it is determined that the self-inspection result of the branch box is a qualified self-inspection.
The method for self-inspection of a branch box according to claims 1-5, wherein the current temperature of each indoor heat exchanger connected to the branch box is obtained by receiving a self-inspection command, and based on the temperature of each indoor heat exchanger Current Temperature Steps to build the current temperature set, including:

Upon receiving the self-check command, close each throttling device in the branch box; and,

After each throttling device is closed, the current temperature of each indoor heat exchanger connected to the branch box is acquired, and a current temperature set is constructed according to the current temperature of each indoor heat exchanger.
The method for self-checking a branch box according to claims 1-5, wherein after the step of determining the self-check result of the branch box according to the comparison result, the method further comprises:

Determine the current connection relationship between each throttling device in the branch box and each indoor heat exchanger according to the self-check result;

Obtain a preset connection relationship according to preset configuration parameter information, and determine whether the preset connection relationship is the same as the current connection relationship; and,

When it is determined that the preset connection relationship is different from the current connection relationship, the configuration parameter information is modified according to the current connection relationship.
A branch box self-checking device, wherein the branch box self-checking device comprises:

a temperature acquisition module, configured to receive a self-check command, acquire the current temperature of each indoor heat exchanger connected to the branch box, and construct a current temperature set according to the current temperature of each indoor heat exchanger;

The control module is configured to adjust the opening degree of the throttling device in the branch box according to the preset adjustment parameters, and obtain the reference temperature of each indoor heat exchanger after the opening degree is adjusted, and according to the opening degree of each indoor heat exchanger Build a reference temperature set with reference to temperature;

a comparison module configured to compare the current temperature set with the reference temperature set to obtain a comparison result; and,

The confirmation module is configured to determine the self-check result of the divergence box according to the comparison result.
A storage medium, wherein a branch box self-checking program is stored on the storage medium, and the branch box self-checking program according to any one of claims 1 to 7 is implemented when the branch box self-checking program is executed by a processor. steps of the method.
A branch box, wherein the branch box includes: a memory, a processor, and a branch box self-checking program stored on the memory and running on the processor, the branch box self-checking program being executed by the The processor implements the steps of the branch box self-checking method according to any one of claims 1 to 7 when executed.