CN113587393B

CN113587393B - Central air-conditioning control system

Info

Publication number: CN113587393B
Application number: CN202110897515.6A
Authority: CN
Inventors: 徐磊; 曹基宏; 孙照鹏
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-11-29
Anticipated expiration: 2041-08-05
Also published as: CN113587393A; WO2023010848A1; CN117121443A

Abstract

The invention discloses a central air-conditioning control system, comprising: at least one outdoor unit; at least one indoor unit which is connected with each outdoor unit in a communication way through a communication bus; at least one controller, each controller can communicate with each other, and is connected with the communication bus respectively; the configuration module is used for sending an address acquisition instruction to the communication bus and analyzing and receiving the instruction fed back by the controller to determine a controller address list when a new controller is accessed to the communication bus; configuring the address of a new controller according to the controller address list; the address fetch instruction includes a default address. The invention can automatically acquire the address of the new access controller, avoid address conflict and save hardware input cost.

Description

Central air-conditioning control system

Technical Field

The invention relates to the technical field of air conditioner control, in particular to a central air conditioner control system.

Background

The application scenes of the existing central air conditioners are more and more extensive, a plurality of indoor units exist under a central air conditioner system, if the number of the indoor units is more under the scene of a plurality of systems, if the air conditioners are managed conveniently, a common remote controller cannot meet the requirements, so that a plurality of controllers are required to be used for management, and the following problems can be caused.

(1) The multiple controllers are all connected to a communication bus of the air conditioning system, and the same equipment address can cause address conflict and cause abnormal communication; (2) Each controller is set with an address before installation, and the address of each controller is manually recorded, so that errors are easy to occur; (3) The address setting is generally carried out through manual dialing or a self-contained UI menu; setting addresses through dialing is troublesome and labor-consuming, and dialing hardware cost is increased; setting the menu with the UI requires the UI of the controller, the UI has an address setting function, and the function of the controller is highly required.

Therefore, a method for managing the addresses of the new access controllers is needed to automatically obtain the addresses of the accessed controllers on the communication bus.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a central air-conditioning control system, which can automatically acquire an address of a newly accessed controller by automatically acquiring an address of an accessed controller on a communication bus, so as to achieve the purpose of automatically setting an address of a new controller, avoid address conflict, and save hardware investment cost.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

the application provides a central air conditioning control system, its characterized in that includes:

at least one outdoor unit;

at least one indoor unit which is connected with each outdoor unit in a communication way through a communication bus;

at least one controller, each controller can communicate with each other and is connected with the communication bus respectively;

the configuration module is used for sending an address acquisition instruction to the communication bus and analyzing and receiving the instruction fed back by the controller to determine a controller address list when a new controller is accessed to the communication bus;

configuring the address of the new controller according to the controller address list;

wherein the address fetch instruction includes a preset address.

In some embodiments of the application, the configuration module is configured to, when an address obtaining instruction is sent to the communication bus, each of the at least one controller feeds back an instruction to the new controller;

the new controller analyzes the received instruction to obtain the controller address of each controller;

the controller addresses of the at least one controller form the controller address list.

In some embodiments of the present application, the instruction includes a controller address of the controller.

In some embodiments of the present application, the central air conditioning control system further comprises:

a determination module for determining which of the at least one controller feeds the instruction back to the new controller;

wherein the instruction includes a controller address list formed of controller addresses for each of the at least one controller.

In some embodiments of the application, the determining module is configured to obtain the priority of the at least one controller for feeding back the instruction by generating a random number.

In some embodiments of the present application, the controller with the smallest random value acquires the priority.

an update module for updating a list of controller addresses of all online controllers and the new controller in the at least one controller.

The application provides a central air conditioning control system has following advantage and beneficial effect:

(1) The address of the new controller is obtained by automatically obtaining the address of at least one controller which is accessed on the communication bus, so that the purpose of automatically setting the address of the new controller is realized, the address conflict with the accessed controller is avoided, and the reliable communication is ensured;

(2) The address setting of the new controller can be realized by using a software program, so that the hardware investment cost is saved;

(3) The address of a new controller does not need to be set manually, and time and labor are saved.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic block diagram of one embodiment of a central air conditioning control system according to the present invention;

FIG. 2 is a flowchart of calculating the address of a new controller in one embodiment of the central air conditioning control system according to the present invention;

fig. 3 is a flowchart of calculating an address of a new controller and confirming with at least one accessed controller in another embodiment of the central air-conditioning control system according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection unless otherwise specifically stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

[ basic operation principle of air conditioner ]

A refrigeration cycle of an air conditioner includes a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the ambient environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant.

The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor.

The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of an air conditioner refers to a portion including a compressor of a refrigeration cycle and includes an outdoor heat exchanger, the indoor unit of an air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit of an air conditioner.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner serves as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner serves as a cooler in a cooling mode.

Central air-conditioning control system

The central air-conditioning control system comprises at least one outdoor unit, at least one indoor unit, at least one controller and a configuration module.

Referring to fig. 1, which shows only one outdoor unit, the outdoor unit is communicatively connected to at least one indoor unit (indoor unit 1, indoor unit 2, indoor unit n (n ≧ 1)) through a communication bus.

The outdoor unit and the indoor unit form an air conditioning system, and the controller is used for controlling the air conditioning system.

Referring to fig. 1, at least one controller that has been accessed is denoted as: the controller comprises a controller 1, a controller 2 and a controller n (n is more than or equal to 1), wherein the controllers are respectively connected to a communication bus.

The controllers can communicate with each other, i.e., the controllers can receive communication messages from other controllers.

When the new controller n +1 is newly accessed to the communication bus, how to acquire the address of the new controller n +1 is a problem to be solved.

The configuration module is used for determining a controller address list by sending an address acquisition instruction A to the communication bus and receiving and analyzing an instruction fed back by the controller when a new controller n +1 is accessed to the communication bus.

The configuration module is further configured to configure an address of the new controller n +1 according to the controller address list.

It should be noted that the address fetch instruction a includes a preset address, for example, the address information of the preset address is FF, and has a flag bit for identifying that the issued instruction is an address fetch instruction.

Thus, when the controller i (i is more than or equal to 1 and less than or equal to n) receives the address acquisition instruction A, the address information sent by the instruction is FF, and the instruction is the instruction for acquiring the address.

The command of controller feedback received by the new controller n +1 as described above includes two cases: 1. each controller i (i is more than or equal to 1 and less than or equal to n) feeds back an instruction to the new controller n + 1; 2. one controller i (i is more than or equal to 1 and less than or equal to n) feeds back an instruction to the new controller n +1.

According to the above two cases, the following description will be made separately.

Configuring the Address I of a New controller

Referring to FIG. 2, a flow chart is shown for the controller i (1 ≦ i ≦ n) communicating with the new controller n +1 for determining the address of the new controller n +1.

Each controller i (1. Ltoreq. I.ltoreq.n) knows its own address, but does not know a controller address list formed by the controller addresses of each controller i (1. Ltoreq. I.ltoreq.n).

Therefore, each controller i needs to communicate with the new controller n +1, respectively.

S21: the new controller n +1 has access to the communication bus.

S22: the new controller n +1 sends an address fetch instruction a to the communication bus.

The address fetch instruction A is an instruction having a predetermined address and flag bits as described above.

S23: and judging whether at least one controller i (i is more than or equal to 1 and less than or equal to n) exists on the communication bus, if so, proceeding to S24, and if not, configuring the address of a new controller n +1.

It should be noted that at least one existing controller should be previously accessed to the communication bus, that is, the newly accessed controller is not the controller that is accessed to the first communication bus.

If the new controller is the controller on the first access communication bus, its address can be freely allocated under the condition of meeting the requirement, and at this time, the problem of address conflict with other existing controllers is not considered.

S24: and at least one controller receives the address acquisition instruction A through the communication bus in sequence and feeds back an instruction B to the communication bus.

At least one controller i (i is more than or equal to 1 and less than or equal to n) sends an instruction B to the communication bus, and the instruction B comprises the controller address of the controller i.

For example, the controller 1 receives the address acquisition instruction a, and feeds back an instruction B containing the controller address of the controller 1 to the communication bus.

The controller 2 receives the address acquisition command a and feeds back a command B containing a controller address of the controller 2 to the communication bus.

It should be noted that at least one controller i (i is greater than or equal to 1 and less than or equal to n) needs to be online, so that the address of the new controller n +1 can be configured reliably, and address conflict is avoided.

S25: and the new controller n +1 receives the instruction B and then analyzes the instruction B to form a controller address list table1.

For example, the new controller n +1 receives the command B, parses it, obtains the controller address of the controller 1, and stores it.

And the new controller n +2 analyzes the command B after receiving the command B, and acquires and stores the controller address of the controller 2.

And sequentially acquiring and storing the controller address of each controller i to form a controller address list table1.

S26: after the new controller n +1 is judged to finish searching all the controllers 1 to n, the address of the new controller n +1 is configured according to the controller address list table1.

Typically, the controller addresses of the existing controllers are consecutive, so that addresses can be consecutively allocated to the new controller n +1.

If the address of the controller m (1 is less than or equal to m and less than n) is not continuous with the address of the controller m +1, the new controller n +1 can be configured with the address between the address of the controller m (1 is less than or equal to m and less than n) and the address of the controller m +1, and address waste is avoided.

Assume that the timeout time for receiving the feedback command of each controller is set to T by the new controller n +1, the upper limit number of the controllers is M, and the maximum timeout time is T × M, that is, the accessed controller n +1 waits for T × M time.

After the time is longer than or equal to T × M, all the controllers on the communication bus are considered to be searched, and then the address of the new controller n +1 can be configured according to the controller address list table1.

The central air-conditioning control system can realize the automatic configuration of the n +1 address of the new controller.

The address configuration method needs to wait for timeout T × M to judge that the search of the controller is finished, the automatic address configuration time is long, and the problem of incomplete search caused by timeout even though the search is not finished may exist; and all controllers 1 to n need to be ensured to be online.

Configuring the Address II of the New controller

To solve the technical problem as described above, see FIG. 3, which shows a flowchart of a controller i (1 ≦ i ≦ n) communicating with a new controller n +1 for determining the address of the new controller n +1, and for acknowledging with controllers 1 to n (see dashed boxes in FIG. 3).

S31: and accessing a new controller n +1.

S32: the new controller n +1 sends an address fetch instruction a to the communication bus.

S33: and judging whether at least one controller i (i is more than or equal to 1 and less than or equal to n) exists on the communication bus, if so, proceeding to S34, and if not, configuring the address of a new controller n +1.

S34: one of the at least one controller receives the address acquisition instruction A through the communication bus and feeds back an instruction B' to the communication bus.

For example, the controller 1 receives the address acquisition instruction a, and feeds back an instruction B' including controller addresses of the controllers 1 to n to the communication bus.

The controller 2 receives the address acquisition instruction A and feeds back an instruction B' containing controller addresses of the controllers 1 to n to the communication bus.

Here, the command B' includes a controller address list table1 formed of the controller addresses of the respective controllers i (1. Ltoreq. I.ltoreq.n).

The determining module is used for determining which controller of the at least one controller feeds back the instruction B 'to the communication bus, namely, determining the priority of the controller which feeds back the instruction B' to the communication bus.

In the present application, the determining module obtains the priority of the at least one controller of the feedback command B' by generating a random number.

First, a random number is generated by seeding with the system time.

Secondly, the controller with the smallest random number is selected to feed back the command B' to the communication bus, i.e. the controller with the smallest random number is considered to have the highest priority.

The minimum random number represents that the system time is the earliest, and after the controller with the earliest time feeds back the instruction B ', other subsequent controllers do not feed back the instruction B' to the communication bus any more.

Of course, there are many ways to determine which controller feeds back the command B', for example, the priority order of each controller in at least one controller is preset, and the priorities of the controllers in controllers 1 to n are decreased sequentially.

When any one of the controllers 1 to n receives the address acquisition instruction a sent by the new controller n +1, the fed-back instruction B' includes the controller address list table1 of the controller addresses of the controllers 1 to n, that is, each of the controllers 1 to n has the controller address list table1 as described above.

As follows, the controller address list table1 can be obtained only by transmitting any one of the new controller n +1 and the controllers 1 to n, so that the time for configuring the address of the new controller n +1 is saved; and no busy communication is caused on the communication bus.

It should be noted that at least one existing controller should be connected to the communication bus in advance, that is, a newly connected controller is not a controller connected to the first communication bus.

If the new controller is the controller on the first access communication bus, its address can be freely allocated under the condition of meeting the requirement, and in this case, the problem of address conflict with other existing controllers is not considered.

S35: and the new controller n +1 receives the instruction B 'and then analyzes the instruction B', and acquires a controller address list table1.

For example, after receiving the instruction B' fed back by the controller 1, the new controller n +1 analyzes the instruction to obtain a controller address list table1; or alternatively

And the new controller n +1 receives the instruction B 'fed back by the controller 2 and analyzes the instruction B', and acquires a controller address list table1.

S36: and configuring the address of the new controller n +1 according to the controller address list table1.

The controller addresses in the controller address list table1 of the existing controller are continuous, so that the addresses can be continuously configured for the new controller n +1.

If the addresses in the controller address list table1 are not continuous, for example, the address of the controller m (1 ≦ m < n) and the address of the controller m +1 are not continuous, the address between the address of the controller m (1 ≦ m < n) and the address of the controller m +1 may be configured for the new controller n +1, so as to avoid address waste and implement reasonable address allocation.

Updating address lists

After the address of the new controller n +1 is configured, there may be some controllers which are not online (for example, power down) and need to perform online confirmation on the controllers 1 to n for reliable control.

The central air-conditioning control system further comprises an updating module (not shown) for updating the controller address lists of the online controllers and the new controller n +1 in the controllers 1 to n.

S37: the new controller n +1 sends an instruction C to the communication bus.

Instruction C contains a controller address list with the controller address of the new controller.

Namely, the controller address list in the instruction C is a controller address list table containing controller addresses of controllers 1 to n +1 _n+1 {1,2,3，...,n+1}。

S38: and judging whether the controller i (i is more than or equal to 1 and less than or equal to n) feeds back the response command D, if so, going to S39, otherwise, going to S39'.

The new controller n +1 is able to list table according to the controller address _n+1 The information of {1,2,3,. Multidot., n +1} is confirmed online one by one with the controllers 1 to n.

S39: indicating that controller i is online, the controller address of the new controller n +1 is updated into the controller address list of controller i.

And if the controller i (i is more than or equal to 1 and less than or equal to n) receives the command C on line and feeds back a response command D to indicate that the controller i is on line, updating the controller address of the new controller n +1 into a controller address list of the controller i.

For example, after the controller 1 receives the instruction C on line, the controller address of the new controller n +1 is updated to the controller address list of the controller 1, and at this time, the controller address list of the controller 1 is the controller address list table including the controller addresses of the controllers 1 to n +1 ₁ {1,2,3,...,n+1}。

Thus, if all the controllers 1 to n are online, the controller address list of each controller in the controllers 1 to n is the controller address list containing the controller addresses of the controllers 1 to n +1.

And S39': indicating that the controller i is online, the new controller n +1 will slave the controller address of the controller i to the controller address list table of the new controller n +1 _n+1 And {1,2, 3., n +1 }.

If the new controller n +1 does not receive the response instruction D of one controller i (i is more than or equal to 1 and less than or equal to n) in the controllers 1 to n, the instruction C is sent to the communication bus again, if the response instruction D of the controller i (i is more than or equal to 1 and less than or equal to n) is not received, the controller i (i is more than or equal to 1 and less than or equal to n) is not on line, and at the moment, the new controller n +1 can enable the controller address of the controller i to be from the controller address list table of the new controller n +1 _n+1 (1, 2, 3.. N + 1) to form an updated controller address list table _n+1 {1,2,3,...,i-1,i+1,...,n+1}。

S40: after the controllers 1 to n are confirmed one by one, the new controller n +1 updates the controller address list.

Thus, the controllers 1 to n are confirmed one by one, and after all the controllers 1 to n are confirmed, the controller address list updated by the new controller n +1 comprises the controller addresses of all the online controllers in the controllers 1 to n and the controller address of the new controller n +1.

For example, after the controllers 1 to n are confirmed, the controller addresses of the controllers are listed as follows only if the controller 3 is not online in the controllers 1 to n.

The controller address list updated by the new controller n +1 is table _n+1 {1,2,4,...,n+1}。

For an online controller, the controller address list is table ₁ {1,2,3,...,n+1}。

S41: and the new controller n +1 sends the updated controller address list to a communication bus through an instruction E, and all the online controllers synchronously update the controller address lists.

For example, the new controller n +1 updates the controller address list to table _n+1 {1,2, 4., n +1}, then the list of controller addresses for all online controllers is also from the table ₁ {1,2,3,. Eta., n +1} is updated to a table _n+1 {1,2,4,...,n+1}。

Namely, the controller address of the non-on-line controller (namely, the controller 3) is eliminated, and the confirmation mode can avoid control omission and is convenient and reliable to control.

Therefore, the address of the new controller n +1 newly accessed to the communication bus can be automatically set in the mode, the hardware input cost is saved, the address configuration time is saved, and the address setting efficiency is improved.

The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding claims.

Claims

1. A central air conditioning control system, comprising:

at least one outdoor unit;

the configuration module is used for sending an address acquisition instruction to the communication bus and analyzing and receiving an instruction fed back by the controller when a new controller is accessed to the communication bus to determine a controller address list;

wherein the address fetch instruction includes a preset address.

2. The central air-conditioning control system according to claim 1,

the configuration module is used for feeding back instructions to the new controller by each of the at least one controller when the configuration module sends an address acquisition instruction to the communication bus;

3. The central air-conditioning control system according to claim 1,

the instruction includes a controller address of the controller.

4. The central air-conditioning control system according to claim 1, characterized by further comprising:

wherein the instructions include a controller address list formed of controller addresses for each of the at least one controller.

5. The central air-conditioning control system according to claim 4, characterized in that the determination module acquires the priority of the at least one controller for feeding back the instruction by generating a random number.

6. The central air-conditioning control system according to claim 5, characterized in that the controller with the smallest random value acquires the priority.

7. The central air-conditioning control system according to claim 6, characterized by further comprising: