Control method, device and equipment of air conditioning unit and storage medium

Abstract

The application provides a control method, device and equipment of an air conditioning unit and a storage medium, and comprises the following steps: detecting whether a condensing side water inlet temperature meets a preset high-low temperature starting condition; if the condensing side water inlet temperature meets the preset high-low temperature starting condition, in a starting stage of a to-be-started compressor, an electronic expansion valve is controlled based on a preset electronic expansion valve opening degree to increase refrigerant flow, and the to-be-started compressor is controlled based on a preset load, so that the to-be-started compressor can slowly increase the capacity of the to-be-started compressor under a lower load. By adopting the technical scheme of the application, the reliable operation of the compressor can be ensured, and the trouble reporting rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and specifically provides a control method, device, equipment, and storage medium for an air conditioning unit. Background Technology

[0002] An air conditioning unit includes a compressor, a condenser, and an evaporator connected in sequence. An expansion valve is installed on the liquid line between the condenser and the evaporator. The condenser is connected to the compressor's cooling port via a cooling pipe. During compressor startup, if the condenser-side inlet water temperature is too high, it can easily lead to excessively high system discharge pressure and cause compressor overcurrent; if the condenser-side inlet water temperature is too low, it will trigger the compressor's low-pressure protection, thus causing a fault report during compressor startup.

[0003] Therefore, how to ensure the reliable operation of the compressor and reduce the failure rate is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention is proposed to provide a control method, apparatus, equipment and storage medium for air conditioning units that solve or at least partially solve the technical problem of low compressor operation reliability and high failure rate caused by excessively high or low condenser side inlet water temperature.

[0005] In this respect, the present invention provides a control method for an air conditioning unit, comprising:

[0006] Check whether the condensate inlet water temperature meets the preset high and low temperature start-up conditions;

[0007] If the condenser side inlet water temperature meets the preset high and low temperature start-up conditions, during the start-up phase of the compressor to be started, the electronic expansion valve is controlled based on the preset opening degree of the electronic expansion valve, and the compressor to be started is controlled based on the preset load.

[0008] Wherein, the preset opening degree of the electronic expansion valve is greater than the required opening degree of the electronic expansion valve of the air conditioning unit to be turned on;

[0009] The preset load is less than the required load of the air conditioning unit to be turned on.

[0010] Furthermore, the control method for the air conditioning unit described above also includes:

[0011] Once the compressor to be turned on has started, the timer will begin.

[0012] When the timing reaches the first preset duration, the compressor to be turned on is controlled based on the demand load of the air conditioning unit to be turned on.

[0013] Furthermore, the control method for the air conditioning unit described above also includes:

[0014] If the timing duration does not reach the first preset duration, and if the condensate side inlet water temperature is detected to not meet the preset high and low temperature start-up conditions, the duration that can be shortened from the first preset duration is determined.

[0015] Based on the shortenable duration, the first preset duration is shortened.

[0016] Furthermore, the control method for the air conditioning unit described above, in determining the shortenable duration of the first preset time, includes:

[0017] Obtain the duration difference between the first preset duration and the timing duration;

[0018] If the time difference is greater than or equal to the preset correction time, the preset correction time shall be used as the shortenable time.

[0019] If the duration difference is less than the preset correction duration, the shortenable duration is determined to be 0, or the duration difference is taken as the shortenable duration.

[0020] Furthermore, the control method for the air conditioning unit described above also includes:

[0021] Once the compressor to be started has started, the electronic expansion valve is controlled based on the required opening degree of the electronic expansion valve of the air conditioning unit to be started.

[0022] Furthermore, the preset high and low temperature start-up conditions in the above-described air conditioning unit control method include:

[0023] The condensate inlet water temperature is lower than the first preset temperature, and the first duration of this state reaches the second preset duration; or

[0024] The condenser side inlet water temperature is greater than the second preset temperature, and the temperature difference between the condenser side inlet water temperature and the evaporator side inlet water temperature is less than the preset temperature difference, and the second duration under this state reaches the third preset duration.

[0025] In a second aspect, the present invention provides a control device for an air conditioning unit, comprising:

[0026] The detection module is used to detect whether the condensate side inlet water temperature meets the preset high and low temperature start-up conditions;

[0027] The control module is used to control the electronic expansion valve based on the preset opening degree of the electronic expansion valve during the start-up phase of the compressor to be started if the condenser side inlet water temperature meets the preset high and low temperature start-up conditions, and to control the compressor to be started based on the preset load.

[0028] Wherein, the preset opening degree of the electronic expansion valve is greater than the required opening degree of the electronic expansion valve of the air conditioning unit to be turned on;

[0029] The preset load is less than the required load of the air conditioning unit to be turned on.

[0030] In a third aspect, a control device for an air conditioning unit is provided, comprising a processor and a storage device, the storage device being adapted to store a plurality of program codes, characterized in that the program codes are adapted to be loaded and run by the processor to perform the control method of the air conditioning unit described in any of the preceding claims.

[0031] In a fourth aspect, a computer air conditioning unit is provided, characterized in that it includes the control equipment of the air conditioning unit described above.

[0032] In a fifth aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored therein, the program codes being adapted to be loaded and run by a processor to perform the control method of the air conditioning unit described in any of the above-mentioned technical solutions.

[0033] The above-described technical solutions of the present invention have at least one or more of the following beneficial effects:

[0034] In implementing the technical solution of this invention, if the condenser-side inlet water temperature is detected to meet the preset high and low temperature start-up conditions, during the start-up phase of the compressor to be started, the electronic expansion valve is controlled based on the preset opening degree to increase the refrigerant flow, and the compressor to be started is controlled based on the preset load, so that the compressor to be started can slowly increase its capacity under a lower load. By adopting the technical solution of this invention, reliable compressor operation can be guaranteed and the failure rate can be reduced. Attached Figure Description

[0035] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0036] Figure 1 This is a schematic flowchart of the main steps of a control method for an air conditioning unit according to an embodiment of the present invention;

[0037] Figure 2 This is a main structural block diagram of the control device for an air conditioning unit according to an embodiment of the present invention. Detailed Implementation

[0038] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0039] In the description of this invention, "module" and "processor" can include hardware, software, or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, memory, and may also include software components, such as program code, or a combination of software and hardware. A processor can be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media includes any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and / or B" and can include only A, only B, or A and B. The singular terms "a" or "this" can also include plural forms.

[0040] See appendix Figure 1 , Figure 1 This is a schematic flowchart illustrating the main steps of a control method for an air conditioning unit according to an embodiment of the present invention. Figure 1 As shown, the control method of the air conditioning unit in this embodiment of the invention mainly includes the following steps 101-102.

[0041] Step 101: Check whether the condensate side inlet water temperature meets the preset high and low temperature start-up conditions;

[0042] In a specific implementation process, the condenser side inlet water temperature can be collected by a corresponding sensor, and then it can be detected whether the condenser side inlet water temperature meets the preset high and low temperature start-up conditions.

[0043] The high and low temperature start-up conditions include:

[0044] The condensate inlet water temperature is lower than the first preset temperature, and the first duration of this state reaches the second preset duration; or

[0045] The condenser side inlet water temperature is greater than the second preset temperature, and the temperature difference between the condenser side inlet water temperature and the evaporator side inlet water temperature is less than the preset temperature difference, and the second duration under this state reaches the third preset duration.

[0046] In a specific implementation, the first preset temperature can range from 5℃ to 13℃, and in this embodiment, it can be 10℃. The second preset duration can be 3 seconds. The second preset temperature can range from 30℃ to 100℃, and in this embodiment, it can be 33℃. The second preset duration can be 3 seconds. The preset temperature difference can be 5℃.

[0047] Step 102: If the condenser side inlet water temperature meets the preset high and low temperature start-up conditions, during the start-up phase of the compressor to be started, the electronic expansion valve is controlled based on the preset electronic expansion valve opening, and the compressor to be started is controlled based on the preset load.

[0048] In a specific implementation process, if the condenser side inlet water temperature meets the preset high and low temperature start-up conditions, the compressor to be started can enter the high and low temperature start-up mode. During the start-up phase, the electronic expansion valve can be controlled based on the preset electronic expansion valve opening degree, and the compressor to be started can be controlled based on the preset load.

[0049] Wherein, the preset electronic expansion valve opening is greater than the required electronic expansion valve opening of the air conditioning unit to be turned on; the preset load is less than the required load of the air conditioning unit to be turned on.

[0050] In a specific implementation, the required opening degree of the electronic expansion valve of the air conditioning unit to be started can be 30%, while the preset opening degree can be 100%. This increases the refrigerant flow rate, which in turn reduces the discharge pressure and the compressor current generated during startup. Thus, if the condenser-side inlet water temperature is too high, the corresponding discharge pressure will not change too much during refrigerant heat exchange, and the compressor current generated during startup is less likely to become excessive, thereby avoiding problems such as excessively high discharge pressure or excessively high compressor current. Conversely, if the condenser-side inlet water temperature is too low, the corresponding suction pressure will not become too low during heat exchange with the refrigerant, thus avoiding triggering the low-pressure protection.

[0051] In one specific implementation, while controlling the electronic expansion valve, the compressor to be started can also be controlled based on a preset load that is less than the required load of the air conditioning unit to be started. For example, the required load of the air conditioning unit to be started can be 100%, and the preset load range can be 20% to 100%, which can be selected as 40% in this embodiment. In this way, the capacity of the compressor to be started can be gradually increased by a smaller load, avoiding the problem of excessive compressor operation, which would result in high pressure and low pressure.

[0052] It should be noted that there can be multiple compressors in the air conditioning unit. After entering the high and low temperature start-up mode, the compressors that have already started can be controlled according to the normal control logic, and the compressors to be started can be controlled according to the control method of the air conditioning unit of the present invention.

[0053] The control method of the air conditioning unit in this embodiment, if the condensate side inlet water temperature is detected to meet the preset high and low temperature start-up conditions, during the start-up phase of the compressor to be started, controls the electronic expansion valve based on the preset opening degree to increase the refrigerant flow, and controls the compressor to be started based on the preset load, so that the compressor to be started can slowly increase its capacity under a low load. Using the technical solution of this invention, reliable compressor operation can be guaranteed and the failure rate can be reduced.

[0054] In one specific implementation, after the compressor to be started completes its startup, a timer begins. When the timer reaches a first preset duration, the compressor is controlled based on the load demand of the air conditioning unit to be started. In other words, after the compressor to be started completes its startup, it continues to be controlled based on a preset load for the first preset duration, and then the high / low temperature start-up mode is exited. The first preset duration can range from 0 to 120 seconds; in this embodiment, 60 seconds can be selected.

[0055] In a specific implementation process, when the timing duration has not reached the first preset duration, the condenser side inlet water temperature can continue to be detected to see if it meets the preset high and low temperature start-up conditions. If the condenser side inlet water temperature does not meet the preset high and low temperature start-up conditions, it means that the compressor to be started can already operate normally. The first preset duration is relatively long, which will make it take a long time for the compressor to be started to reach its optimal capacity. Therefore, in order to enable the compressor to be started to reach its optimal capacity as soon as possible, the first preset duration can be shortened.

[0056] In a specific implementation process, the shortenable duration of the first preset duration can be determined, and the first preset duration can be shortened based on the shortenable duration.

[0057] Specifically, the duration difference between the first preset duration and the timing duration can be obtained; if the duration difference is greater than or equal to the preset correction duration, the preset correction duration is used as the shortenable duration; if the duration difference is less than the preset correction duration, the shortenable duration is determined to be 0, or the duration difference is used as the shortenable duration.

[0058] It should be noted that the above-mentioned technical solution for determining the shortenable duration of the first preset duration is only one of many solutions, and this embodiment is not limited to the above-mentioned technical solution for determining the shortenable duration of the first preset duration.

[0059] For example, the first preset duration can be multiplied by a preset shortening ratio to obtain the shortenable duration of the first preset duration. Further examples will not be provided here.

[0060] In a specific implementation, once the compressor to be started has completed its startup, the electronic expansion valve can be controlled based on the required opening degree of the electronic expansion valve for the air conditioning unit to be started. In other words, once the compressor to be started has completed its startup and no longer requires a large amount of refrigerant, the electronic expansion valve can be opened to the corresponding amount of refrigerant needed.

[0061] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effects of the present invention, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders, and these variations are all within the scope of protection of the present invention.

[0062] Furthermore, the present invention also provides a control device for smart home devices.

[0063] See appendix Figure 2 , Figure 2 This is a main structural block diagram of the control device for an air conditioning unit according to an embodiment of the present invention. Figure 2 As shown, the control device for the air conditioning unit in this embodiment of the invention may include a detection module 20 and a control module 21.

[0064] The detection module 20 is used to detect whether the condensate side inlet water temperature meets the preset high and low temperature start-up conditions;

[0065] In a specific implementation process, the preset high and low temperature start-up conditions include:

[0066] The condenser-side inlet water temperature is lower than the first preset temperature, and the first duration of this state reaches the second preset duration; or, the condenser-side inlet water temperature is higher than the second preset temperature, and the temperature difference between the condenser-side inlet water temperature and the evaporator-side inlet water temperature is less than the preset temperature difference, and the second duration of this state reaches the third preset duration.

[0067] The control module 21 is used to control the electronic expansion valve based on the preset opening degree of the electronic expansion valve during the start-up phase of the compressor to be started if the condenser side inlet water temperature meets the preset high and low temperature start-up conditions, and to control the compressor to be started based on the preset load.

[0068] Wherein, the preset electronic expansion valve opening is greater than the required electronic expansion valve opening of the air conditioning unit to be turned on; the preset load is less than the required load of the air conditioning unit to be turned on.

[0069] In this embodiment, the control device of the air conditioning unit detects that the condensate inlet water temperature meets the preset high and low temperature start-up conditions. During the start-up phase of the compressor to be started, it controls the electronic expansion valve based on the preset opening degree to increase the refrigerant flow. It also controls the compressor to be started based on the preset load, enabling the compressor to gradually increase its capacity under a lower load. By employing the technical solution of this invention, reliable compressor operation can be ensured, and the failure rate can be reduced.

[0070] In a specific implementation process, the control module 21 is also used for:

[0071] Once the compressor to be turned on has started, the timer will begin.

[0072] When the timing reaches the first preset duration, the compressor to be turned on is controlled based on the demand load of the air conditioning unit to be turned on.

[0073] In a specific implementation process, the control module 21 is also used for:

[0074] If the timing duration does not reach the first preset duration, and if the condensate side inlet water temperature does not meet the preset high and low temperature start-up conditions, the shortenable duration of the first preset duration is determined; based on the shortenable duration, the first preset duration is shortened.

[0075] Specifically, the duration difference between the first preset duration and the timing duration can be obtained; if the duration difference is greater than or equal to the preset correction duration, the preset correction duration is used as the shortenable duration; if the duration difference is less than the preset correction duration, the shortenable duration is determined to be 0, or the duration difference is used as the shortenable duration.

[0076] In a specific implementation, the control module 21 is also used to: control the electronic expansion valve based on the opening degree of the electronic expansion valve required by the air conditioning unit to be turned on after the compressor to be turned on has started.

[0077] The control device for the air conditioning unit described above is an embodiment of the control method for the air conditioning unit used to execute the above embodiments. The technical principles, technical problems solved, and technical effects of the two are similar. Those skilled in the art can clearly understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the control device for the air conditioning unit can be referred to the content described in the embodiment of the control method for the air conditioning unit, and will not be repeated here.

[0078] In one specific implementation, the present invention also provides an air conditioning unit, including the control device of the air conditioning unit described in the above embodiments.

[0079] Those skilled in the art will understand that all or part of the processes in the method of the above embodiment of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content included in the computer-readable storage medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electrical carrier signals and telecommunication signals.

[0080] Furthermore, the present invention also provides a control device for an air conditioning unit. In one embodiment of the control device for an air conditioning unit according to the present invention, the control device includes a processor and a storage device. The storage device can be configured to store a program for executing the control method of the air conditioning unit described in the above-described method embodiments. The processor can be configured to execute the program in the storage device, which includes, but is not limited to, a program for executing the control method of the air conditioning unit described in the above-described method embodiments. For ease of explanation, only the parts related to the embodiments of the present invention are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. The control device can be a control device device comprising various electronic devices.

[0081] Furthermore, the present invention also provides a computer-readable storage medium. In one embodiment of the computer-readable storage medium according to the present invention, the computer-readable storage medium can be configured to store a program for executing the control method of an air conditioning unit in the above-described method embodiments. This program can be loaded and run by a processor to implement the control method of the air conditioning unit described above. For ease of explanation, only the parts related to the embodiments of the present invention are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. The computer-readable storage medium can be a storage device comprising various electronic devices. Optionally, in the embodiments of the present invention, the computer-readable storage medium is a non-transitory computer-readable storage medium.

[0082] Furthermore, it should be understood that since the various modules are only provided to illustrate the functional units of the device of the present invention, the physical devices corresponding to these modules may be the processor itself, or a part of the processor's software, hardware, or a combination of software and hardware. Therefore, the number of modules shown in the figures is merely illustrative.

[0083] Those skilled in the art will understand that the various modules in the device can be adaptively split or combined. Such splitting or combining of specific modules will not cause the technical solution to deviate from the principles of the present invention; therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.

[0084] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A control method for an air conditioning unit, characterized in that, include: Check whether the condensate inlet water temperature meets the preset high and low temperature start-up conditions; If the condenser side inlet water temperature meets the preset high and low temperature start-up conditions, during the start-up phase of the compressor to be started, the electronic expansion valve is controlled based on the preset electronic expansion valve opening, and the compressor to be started is controlled based on the preset load, wherein the preset electronic expansion valve opening is greater than the required electronic expansion valve opening of the air conditioning unit to be started, and the preset load is less than the required load of the air conditioning unit to be started. The method further includes: Once the compressor to be turned on has started, the timer will begin. When the timing duration has not reached the first preset duration, if the condensate side inlet water temperature is detected to not meet the preset high and low temperature start-up conditions, the shortenable duration of the first preset duration is determined, and based on the shortenable duration, the first preset duration is shortened. The determination of the shortenable duration of the first preset duration includes: Obtain the duration difference between the first preset duration and the timing duration; Based on the time difference and the preset correction time, the shortenable time of the first preset time is determined.

2. The control method for an air conditioning unit according to claim 1, characterized in that, Also includes: When the timing reaches the first preset duration, the compressor to be turned on is controlled based on the demand load of the air conditioning unit to be turned on.

3. The control method for an air conditioning unit according to claim 1, characterized in that, The step of determining the shortenable duration of the first preset duration based on the duration difference and the preset correction duration includes: If the time difference is greater than or equal to the preset correction time, the preset correction time shall be used as the shortenable time. If the duration difference is less than the preset correction duration, the shortenable duration is determined to be 0, or the duration difference is taken as the shortenable duration.

4. The control method for an air conditioning unit according to claim 1, characterized in that, Also includes: Once the compressor to be started has started, the electronic expansion valve is controlled based on the required opening degree of the electronic expansion valve of the air conditioning unit to be started.

5. The control method for an air conditioning unit according to claim 1, characterized in that, The preset high and low temperature start-up conditions include: The condensate inlet water temperature is lower than the first preset temperature, and the first duration of this state reaches the second preset duration; or The condenser side inlet water temperature is greater than the second preset temperature, and the temperature difference between the condenser side inlet water temperature and the evaporator side inlet water temperature is less than the preset temperature difference, and the second duration under this state reaches the third preset duration.

6. A control device for an air conditioning unit, characterized in that, include: The detection module is used to detect whether the condensate side inlet water temperature meets the preset high and low temperature start-up conditions; The first control module is configured to, during the start-up phase of the compressor to be started, control the electronic expansion valve based on a preset electronic expansion valve opening degree if the condenser side inlet water temperature meets preset high and low temperature start-up conditions, and control the compressor to be started based on a preset load; wherein the preset electronic expansion valve opening degree is greater than the required electronic expansion valve opening degree of the air conditioning unit to be started; and the preset load is less than the required load of the air conditioning unit to be started. The second control module is used to start timing after the compressor to be started completes its startup; if the timing duration has not reached the first preset duration, and if the condenser side inlet water temperature is detected to be not meeting the preset high and low temperature startup conditions, the module determines the shortenable duration of the first preset duration, and shortens the first preset duration based on the shortenable duration. The determination of the shortenable duration of the first preset duration includes: obtaining the duration difference between the first preset duration and the timing duration; and determining the shortenable duration of the first preset duration based on the duration difference and a preset correction duration.

7. A control device for an air conditioning unit, comprising a processor and a storage device, wherein the storage device is adapted to store multiple program codes, characterized in that, The program code is adapted to be loaded and run by the processor to perform the control method of the air conditioning unit according to any one of claims 1 to 5.

8. An air conditioning unit, characterized in that, The control equipment for the air conditioning unit as described in any one of claims 7.

9. A computer-readable storage medium storing a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by a processor to perform the control method of the air conditioning unit according to any one of claims 1 to 5.

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