Air conditioner indoor unit simulation device and multi-split system

Abstract

The utility model discloses an air conditioner indoor unit simulation device and a multi-split system. The air conditioner indoor unit simulation device comprises a control circuit and an electronic expansion valve which are connected with each other. The control circuit is used for being connected with a communication line of an air conditioner indoor unit and an air conditioner outdoor unit, can communicate with the air conditioner outdoor unit through the communication line and is further used for controlling the opening degree of the electronic expansion valve according to control parameters. The control circuit is further used for taking electricity from the communication line so as to supply power to the control circuit and the electronic expansion valve. Compared with the prior art, in the scheme, the air conditioner indoor unit simulation device is installed at the position, where the indoor unit is not installed, in the multi-split system, the opening degree of the electronic expansion valve can be controlled according to the control requirement of the multi-split system, reliable oil return of the system is achieved, and the reliability of the system is improved. In addition, the air conditioner indoor unit simulation device does not contain a heat exchanger, and has the advantages of being simple in structure, low in cost, convenient to install and the like.

Description

Technical Field

[0001] The present application belongs to the technical field of air conditioning, and in particular, relates to an air conditioning indoor unit simulation device and a multi-split system. Background Art

[0002] Multi-split central air conditioners consist of one or more outdoor units connected to multiple indoor units and are usually used in large places such as shopping malls and factories.

[0003] For example, there is such an application scenario in a shopping mall, such as Figure 1 As shown, several shops share a multi-link system. As merchants move in at different times, some shops are renovated first and need to use air conditioning first (such as Figure 1 Indoor unit 1-indoor unit X), other shops may not be decorated yet, and for the installation of multi-split units, they are all installed in advance, especially the pipes and communication lines, which need to be installed all at once. The pipes and communication lines of shops that have not been decorated are pre-laid, but there may be no indoor units (such as Figure 1 Shop y-Shop y+n) in the middle, and there is no power cord. This section of the pipeline may exist as a blind pipe. When the multi-split system is running, these pipelines will affect the oil return of the system compressor and the reliability of the system. In addition, it will also have some adverse effects on the refrigeration system. Utility Model Content

[0004] In view of this, the embodiments of the present application provide an air conditioner indoor unit simulation device and a multi-split system, which can control the opening of the electronic expansion valve according to the control needs of the multi-split system, achieve reliable oil return of the system, and improve system reliability.

[0005] The embodiment of the present application provides an air conditioner indoor unit simulation device, comprising:

[0006] Interconnected control circuit and electronic expansion valve;

[0007] The control circuit is used to connect the communication line between the indoor and outdoor units of the air conditioner, can communicate with the outdoor unit of the air conditioner through the communication line, and is also used to control the opening of the electronic expansion valve according to the control parameters;

[0008] The control circuit is also used to obtain power from the communication line to supply power to itself and the electronic expansion valve.

[0009] Optionally, the control circuit includes: a communication module, a controller, a valve control module and a power extraction module;

[0010] The communication module is used to connect the communication line between the indoor and outdoor units of the air conditioner, and can communicate with the outdoor unit of the air conditioner through the communication line;

[0011] The controller is respectively connected to the communication module and the valve control module by signal, and is used to communicate with the air conditioner outdoor unit through the communication module, and control the opening of the electronic expansion valve through the valve control module according to the control parameters;

[0012] The power taking module is electrically connected to the communication module, the controller, the valve control module and the electronic expansion valve, and is used to take power from the communication line to supply power to the communication module, the controller, the valve control module and the electronic expansion valve.

[0013] Optionally, the control circuit further includes: a human-computer interaction module, connected to the controller, and used to view or set control parameters in the controller.

[0014] Optionally, the control circuit further includes: a function expansion interface connected to the controller and used for the controller to expand preset functions.

[0015] Optionally, the communication line is a second power supply communication bus.

[0016] Optionally, the control parameter includes at least one of the following: switch, temperature and wind speed.

[0017] Optionally, the device further comprises a built-in power supply, and the built-in power supply is used to supply power to the control circuit and the electronic expansion valve.

[0018] The embodiment of the present application also provides a multi-split system, comprising: an air conditioner outdoor unit and the air conditioner indoor unit simulation device in the above embodiment;

[0019] The control circuit in the air conditioner indoor unit simulation device is connected to the air conditioner outdoor unit through an air conditioner indoor unit communication line;

[0020] The electronic expansion valve in the air conditioner indoor unit simulation device is connected to the refrigerant circulation pipeline of the multi-split system.

[0021] The embodiment of the present application also provides a multi-split system, comprising: an air conditioner outdoor unit, a plurality of indoor units, and a plurality of air conditioner indoor unit simulation devices in the above embodiments;

[0022] The control circuit in the air conditioner indoor unit simulation device is connected to the air conditioner outdoor unit through an air conditioner indoor unit communication line;

[0023] The electronic expansion valve in the air conditioner indoor unit simulation device is connected to the refrigerant circulation pipeline of the multi-split system;

[0024] The indoor unit is connected to the refrigerant circulation pipeline of the multi-split system.

[0025] The air conditioner indoor unit simulation device of the embodiment of the present application includes a control circuit and an electronic expansion valve that are connected to each other; the control circuit is used to connect the communication line between the indoor and outdoor units of the air conditioner, can communicate with the outdoor unit of the air conditioner through the communication line, and is also used to control the opening of the electronic expansion valve according to control parameters; the control circuit is also used to draw power from the communication line to power itself and the electronic expansion valve. Compared with the prior art, in this solution, the air conditioner indoor unit simulation device of the present application is installed at a position where the indoor unit is not installed in the multi-split system, and can control the opening of the electronic expansion valve according to the control needs of the multi-split system, thereby achieving reliable oil return of the system and improving system reliability. In addition, the air conditioner indoor unit simulation device of the present application does not contain a heat exchanger, and has the characteristics of simple structure, low cost, and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Attached Figure 1 A structural schematic diagram of an existing multi-link system is shown;

[0028] Attached Figure 2 One of the structural schematic diagrams of an air conditioner indoor unit simulation device provided by the present application is shown;

[0029] Attached Figure 3 The second structural schematic diagram of an air conditioner indoor unit simulation device provided by the present application is shown;

[0030] Attached Figure 4 The third structural schematic diagram of an air conditioner indoor unit simulation device provided by the present application is shown;

[0031] Attached Figure 5 A structural schematic diagram of a multi-connection system provided by the present application is shown.

[0032] Reference numerals:

[0033] An air conditioner indoor unit simulation device 100, an air conditioner outdoor unit 200, and an indoor unit 300;

[0034] Control circuit 10, electronic expansion valve 20;

[0035] Communication module 11 , controller 12 , valve control module 13 , power supply module 14 , human-computer interaction module 15 , and function expansion interface 16 .

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] During the operation of the multi-split system, part of the compressor's lubricating oil will be discharged from the compressor along with the refrigerant gas and enter the system condenser, piping, and evaporator. Only when this part of the discharged lubricating oil can be smoothly brought back to the compressor can the dynamic balance of the entire system oil be maintained. Otherwise, the compressor will be damaged due to lack of oil. The process of lubricating oil from being discharged to returning to the compressor is called oil return.

[0043] One of the purposes of this application is to Figure 1 In the multi-split system shown, shops y to y+n that do not have indoor units installed use the air-conditioning indoor unit simulation device provided in this application to replace the indoor units. According to the control needs of the multi-split system, the opening of the electronic expansion valve is controlled to achieve reliable oil return of the system and improve system reliability.

[0044] Specifically, Figure 2 is a schematic diagram of the structure of an air conditioner indoor unit simulation device provided in an embodiment of the present application, such as Figure 2 As shown, the air conditioner indoor unit simulation device 100 comprises: a control circuit 10 and an electronic expansion valve 20 connected to each other. The electronic expansion valve 20 is connected to the refrigerant circulation pipeline of the multi-split system, and the control circuit 10 is mainly used to communicate with the air conditioner outdoor unit and control the opening of the electronic expansion valve 20 to adjust the refrigerant flow through the electronic expansion valve.

[0045] Specifically, the control circuit 10 can be connected to the communication line between the indoor and outdoor units of the air conditioner, and can communicate with the outdoor unit of the air conditioner through the communication line. The control circuit 10 can also control the opening of the electronic expansion valve according to the control parameters. The control parameters can be preset control instruction parameters such as switch, temperature, wind speed, etc. The communication line is a power supply communication bus 2.

[0046] In addition, the control circuit 10 can draw power from the connected air conditioner indoor and outdoor unit communication line to power itself and the electronic expansion valve 20. Of course, in some embodiments, the air conditioner indoor unit simulation device 100 may also include a built-in power supply, which can power the control circuit 10 and the electronic expansion valve 20 when necessary. The built-in power supply can be a rechargeable battery or a dry battery, which is not limited in this application.

[0047] There are two main types of electronic expansion valves: electromagnetic expansion valves and electric expansion valves. The working principles of the two are slightly different, and users can choose according to actual needs.

[0048] The electromagnetic expansion valve has an electromagnetic coil inside, which is used as a medium to control the system flow. Before the electromagnetic coil is energized, the valve needle is in an open state. After the electromagnetic coil is energized, the degree of opening of the valve needle is controlled by the voltage on the electromagnetic coil. Therefore, the voltage of the electromagnetic coil controls the flow of the expansion valve. The electromagnetic expansion valve has a fast response action, and the refrigeration system is usually always energized during operation.

[0049] The electric expansion valve is a device driven by a stepper motor. The device controls the movement of the internal thread-driven valve needle by providing a logical digital signal to the stepper motor, thereby achieving control of the valve flow and area.

[0050] Specifically, Figure 2As shown, the control circuit 10 may include a communication module 11 , a controller 12 , a valve control module 13 and a power extraction module 14 .

[0051] The communication module 11 is used to connect the communication line between the indoor and outdoor units of the air conditioner, and can communicate with the outdoor unit of the air conditioner through the communication line. The communication line between the indoor and outdoor units of the air conditioner is a cable connecting the indoor unit and the outdoor unit of the air conditioner, and is mainly used to transmit control signals and power signals. Specifically, the functions of the communication line between the indoor and outdoor units of the air conditioner include the following aspects: 1. Transmission of control signals: The indoor unit of the air conditioner sends control commands to the outdoor unit through the communication line, such as switch, temperature, wind speed, etc. After receiving the command, the outdoor unit will operate accordingly. 2. Transmission of power signal: The indoor unit of the air conditioner needs to obtain power supply from the outdoor unit, so it needs to be connected to the power output port of the outdoor unit through the communication line. 3. Transmission of status information: The indoor unit of the air conditioner can obtain the status information of the outdoor unit through the communication line, such as fault code, operation mode, etc. This information can help users understand the operation of the equipment and perform maintenance and maintenance in a timely manner.

[0052] The controller 12 is connected to the communication module 11 and the valve control module 13 by signals. The controller 12 can communicate with the air conditioner outdoor unit through the communication module 11, and control the opening of the electronic expansion valve 20 through the valve control module 13 according to the control parameters to adjust the refrigerant flow through the electronic expansion valve. The controller 12 can adopt a microcontroller unit (MCU) to handle simple computing tasks, such as temperature control, timer, key detection, etc.

[0053] The power taking module 14 is electrically connected to the communication module 11, the controller 12, the valve control module 13 and the electronic expansion valve 20. The power taking module 14 can take power from the communication line between the indoor and outdoor units of the air conditioner to power the remaining modules in the control circuit and the electronic expansion valve. The power taking module 14 can convert the electrical signal on the communication line into the power required by the remaining modules in the control circuit and the electronic expansion valve.

[0054] In some embodiments, Figure 3 As shown, the control circuit 10 also includes: a human-computer interaction module 15, which is connected to the controller 12. An external device can view the control parameters in the controller 12 or set the control parameters in the controller 12 through the human-computer interaction module 15.

[0055] In some embodiments, Figure 4As shown, the control circuit 10 may further include: a function expansion interface 16, the function expansion interface 16 is connected to the controller 12, and the controller 12 may be connected to other functional devices through the function expansion interface 16 to expand the corresponding preset functions. The function expansion interface 16 is actually a reserved communication interface, and other functional devices can be connected as needed.

[0056] The air conditioner indoor unit simulation device of the embodiment of the present application includes a control circuit and an electronic expansion valve connected to each other; the control circuit is used to connect the communication line between the indoor and outdoor units of the air conditioner, can communicate with the outdoor unit of the air conditioner through the communication line, and is also used to control the opening of the electronic expansion valve according to the control parameters; the control circuit is also used to draw power from the communication line to power itself and the electronic expansion valve. Compared with the prior art, in this solution, the air conditioner indoor unit simulation device of the present application is installed at a position where the indoor unit is not installed in the multi-split system, and can control the opening of the electronic expansion valve according to the control needs of the multi-split system, realize reliable oil return of the system, and improve the reliability of the system.

[0057] Figure 5 is a structural diagram of a multi-connection system provided in an embodiment of the present application, such as Figure 5 As shown, the multi-split system includes: an air-conditioning outdoor unit 200 and the air-conditioning indoor unit simulation device 100 in the above-mentioned embodiment, the control circuit 10 in the air-conditioning indoor unit simulation device 100 is connected to the air-conditioning outdoor unit 200 through the air-conditioning indoor and outdoor unit communication line, and the electronic expansion valve 20 in the air-conditioning indoor unit simulation device 100 is connected to the refrigerant circulation pipeline of the multi-split system.

[0058] When the air conditioner indoor unit simulation device 100 is connected to the multi-split system, the air conditioner indoor unit simulation device 100 can communicate normally with the air conditioner outdoor unit 200 and can automatically assign addresses. The corresponding parameters can be viewed and set through the human-computer interaction module, and some extended functions can be performed through the function extension interface. Figure 5 In the figure, the shops y to y+n that have not installed indoor units are all equipped with air-conditioner indoor unit simulation devices 100. When the real indoor units of the shops arrive, the air-conditioner indoor unit simulation devices 100 can be replaced. The air-conditioner indoor unit simulation devices 100 can be recycled and used multiple times.

[0059] The present application also provides a multi-connection system. Figure 5 As shown, the multi-split system includes: an air conditioner outdoor unit 200, a plurality of indoor units 300, and a plurality of air conditioner indoor unit simulation devices 100 in the above-mentioned embodiments. The control circuit 10 in the air conditioner indoor unit simulation device 100 is connected to the air conditioner outdoor unit 200 through the air conditioner indoor and outdoor unit communication line, and the electronic expansion valve 20 in the air conditioner indoor unit simulation device 100 is connected to the refrigerant circulation pipeline of the multi-split system. The indoor unit 300 is connected to the refrigerant circulation pipeline of the multi-split system.

[0060] Compared to Figure 1 The prior art shown in the figure, the present application installs the air conditioner indoor unit simulation device of the present application at the position where the indoor unit is not installed in the multi-split system, and can control the opening of the electronic expansion valve according to the control needs of the multi-split system, realize the reliable oil return of the system, and improve the reliability of the system. In addition, the air conditioner indoor unit simulation device of the present application does not contain a heat exchanger, and has the characteristics of simple structure, low cost, and easy installation.

[0061] It should be noted that:

[0062] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0063] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioner indoor unit simulation device, characterized in that: include: Interconnected control circuit and electronic expansion valve; The control circuit is used to connect the communication line between the indoor and outdoor units of the air conditioner, can communicate with the outdoor unit of the air conditioner through the communication line, and is also used to control the opening of the electronic expansion valve according to the control parameters; The control circuit is also used to obtain power from the communication line to supply power to itself and the electronic expansion valve.

2. The air conditioner indoor unit simulation device according to claim 1, characterized in that: The control circuit includes: a communication module, a controller, a valve control module and a power supply module; The communication module is used to connect the communication line between the indoor and outdoor units of the air conditioner, and can communicate with the outdoor unit of the air conditioner through the communication line; The controller is respectively connected to the communication module and the valve control module by signal, and is used to communicate with the air conditioner outdoor unit through the communication module, and to control the opening of the electronic expansion valve through the valve control module according to the control parameters; The power taking module is electrically connected to the communication module, the controller, the valve control module and the electronic expansion valve, and is used to take power from the communication line to supply power to the communication module, the controller, the valve control module and the electronic expansion valve.

3. The air conditioner indoor unit simulation device according to claim 2, characterized in that: The control circuit further comprises: a human-computer interaction module connected to the controller and used for viewing or setting control parameters in the controller.

4. The air conditioner indoor unit simulation device according to claim 2 or 3, characterized in that: The control circuit further comprises: a function expansion interface connected to the controller and used for the controller to expand preset functions.

5. The air conditioner indoor unit simulation device according to claim 1, characterized in that: The communication line is a second power supply communication bus.

6. The air conditioner indoor unit simulation device according to claim 1, characterized in that: The control parameter includes at least one of the following items: switch, temperature and wind speed.

7. The air conditioner indoor unit simulation device according to claim 1, characterized in that: The device further comprises a built-in power supply, and the built-in power supply is used to supply power to the control circuit and the electronic expansion valve.

8. A multi-link system, characterized in that: include: An air conditioner outdoor unit and at least one air conditioner indoor unit simulation device according to any one of claims 1 to 7; The control circuit in the air conditioner indoor unit simulation device is connected to the air conditioner outdoor unit through an air conditioner indoor unit communication line; The electronic expansion valve in the air conditioner indoor unit simulation device is connected to the refrigerant circulation pipeline of the multi-split system.

9. A multi-link system, characterized in that: include: An air conditioner outdoor unit, a plurality of indoor units, and a plurality of air conditioner indoor unit simulation devices according to any one of claims 1 to 7; The control circuit in the air conditioner indoor unit simulation device is connected to the air conditioner outdoor unit through an air conditioner indoor unit communication line; The electronic expansion valve in the air conditioner indoor unit simulation device is connected to the refrigerant circulation pipeline of the multi-split system; The indoor unit is connected to the refrigerant circulation pipeline of the multi-split system.

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