Air conditioner outdoor unit control method and system and storage medium
By obtaining and updating the target evaporation pressure, calculating the capability requirements of the air conditioner external unit, the problem that the air conditioner unit without internal and external units cannot accurately calculate the compressor capacity, and achieves a more efficient energy-saving effect.
Patent Information
- Application Number
- CN202510282584.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-05-13
AI Technical Summary
The air conditioning unit without internal and external communication cannot accurately calculate the compressor capability that the outdoor unit should output, resulting in the inability to take into account the indoor comfort and the energy-saving effect of the system.
By obtaining the target evaporation pressure and updating the target evaporation pressure based on shutdown or operating parameters, the capacity requirements are calculated to control the air conditioner external unit.
It achieves better adjustment of unit capacity output according to user needs and improves energy saving effect.
Smart Images
Figure CN119983495A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a control technology, and more particularly to an air-conditioning outdoor unit control method, system and storage medium, belonging to the field of air-conditioning outdoor unit control technology. Background Art
[0002] Air conditioners without indoor and outdoor unit communication can be used with indoor and outdoor units of different brands at will, with high adaptability and selectivity, and are favored by users. Since the outdoor unit of a unit without indoor and outdoor unit communication cannot obtain the set temperature and room temperature information of the indoor unit, it cannot accurately calculate how much capacity the compressor should output, and cannot give a good balance between indoor comfort and system energy saving effect. Summary of the invention
[0003] In view of this, the present application provides an air conditioner outdoor unit control method, system and storage medium to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.
[0004] The technical solution of the embodiment of the present application is implemented as follows: A method for controlling an outdoor unit of an air conditioner, comprising:
[0005] Obtain a target evaporating pressure, and calculate a capacity requirement based on the target evaporating pressure to control the current air-conditioning outdoor unit according to the capacity requirement; detect in real time whether the air-conditioning outdoor unit is in a shutdown state, and if so, update the target evaporating pressure based on shutdown parameters and the evaporating pressure just before shutdown; otherwise, update the target evaporating pressure based on operating parameters and the compression ratio of the compressor.
[0006] Further preferably, the obtaining of the target evaporation pressure comprises: after power-on operation, determining whether the air conditioner outdoor unit is powered on for the first time, and if so, taking a preset initial evaporation pressure as the target evaporation pressure; otherwise obtaining the latest evaporation pressure as the target evaporation pressure.
[0007] Further preferably, updating the target evaporation pressure based on the shutdown parameters and the evaporation pressure just before the shutdown comprises: obtaining the shutdown parameters based on the shutdown state, and obtaining the evaporation pressure just before the current shutdown; wherein the shutdown parameters at least include the number of shutdowns and the duration of the current operation.
[0008] Further preferably, the updating of the target evaporating pressure based on the shutdown parameters and the evaporating pressure just before the shutdown also includes: judging whether the evaporating pressure just before the shutdown is less than the evaporating pressure just before the last shutdown, and if so, taking the evaporating pressure just before the current shutdown as the target evaporating pressure; otherwise, obtaining a pressure average value based on the evaporating pressure just before the current shutdown to update the target evaporating pressure according to the pressure average value.
[0009] Further preferably, updating the target evaporation pressure according to the pressure average value includes: calculating a target parameter according to the pressure average value, the evaporation pressure just before this shutdown, the evaporation pressure before the last shutdown, the number of shutdowns and the duration of the current operation, so as to update the target evaporation pressure based on the target parameter.
[0010] Further preferred: the operating parameters include at least the current operating duration and the outdoor fan; the updating of the target evaporating pressure based on the operating parameters and the compression ratio of the compressor includes: real-time detection of whether the current operating duration is greater than or equal to a preset time; if so, detection of whether the outdoor fan is greater than or equal to a preset speed; otherwise, the target evaporating pressure is not updated; wherein, if the outdoor fan is greater than the preset speed, a compression ratio judgment is performed; otherwise, the outdoor fan is adjusted to the preset speed and a compression ratio judgment is performed.
[0011] Further preferably, the compression ratio judgment includes: judging whether the compression ratio is less than a preset compression ratio threshold, and if so, updating based on the current target evaporation pressure; otherwise, not updating the target evaporation pressure.
[0012] Further preferably, after the updating based on the current target evaporation pressure, the method further includes: performing a zeroing operation on the timer.
[0013] Based on the same concept, the present application also provides an air conditioner outdoor unit control system, including:
[0014] The detection module is used to detect in real time whether the air conditioner outdoor unit is in a shutdown state. If so, the target evaporation pressure is updated based on the shutdown parameters and the evaporation pressure just before the shutdown; otherwise, the target evaporation pressure is updated based on the operating parameters and the compression ratio of the compressor.
[0015] And, a control module is used to obtain a target evaporation pressure and calculate a capacity requirement according to the target evaporation pressure, so as to control the current air-conditioning outdoor unit according to the capacity requirement.
[0016] Based on the same concept, the present application also provides a computer-readable storage medium storing a computer program, which implements the above-mentioned air conditioner outdoor unit control method when executed by a processor.
[0017] The embodiment of the present application adopts the above technical solution, which has the following advantages:
[0018] This application can better adjust the unit capacity output based on user needs and save more energy by continuously correcting the target evaporation pressure.
[0019] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 This is a flow chart of the air conditioner outdoor unit control method described in this application.
[0022] Figure 2 This is a framework diagram of the air conditioner outdoor unit control system described in this application. DETAILED DESCRIPTION
[0023] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0024] The embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0025] like Figure 1 As shown, the embodiment of the present application provides a method for controlling an outdoor unit of an air conditioner, comprising:
[0026] Obtain a target evaporating pressure, and calculate a capacity requirement based on the target evaporating pressure to control the current air-conditioning outdoor unit according to the capacity requirement; detect in real time whether the air-conditioning outdoor unit is in a shutdown state, and if so, update the target evaporating pressure based on shutdown parameters and the evaporating pressure just before shutdown; otherwise, update the target evaporating pressure based on operating parameters and the compression ratio of the compressor.
[0027] In this embodiment, specifically: the obtaining of the target evaporation pressure includes: after power-on operation, determining whether the air conditioner outdoor unit is powered on for the first time, and if so, taking a preset initial evaporation pressure as the target evaporation pressure; otherwise obtaining the latest evaporation pressure as the target evaporation pressure.
[0028] Among them, the initial steps are: start-up operation. The capacity requirement is calculated using the initial target evaporation pressure (i.e., the preset initial evaporation pressure) Pe i for the first power-on operation, and Pet=Pe i; the capacity requirement is calculated using the latest Pet (i.e., the latest evaporation pressure) for non-first power-on operation.
[0029] In this embodiment, specifically: updating the target evaporation pressure based on the shutdown parameters and the evaporation pressure just before the shutdown includes: obtaining the shutdown parameters based on the shutdown state, and obtaining the evaporation pressure just before the current shutdown; wherein the shutdown parameters include at least the number of shutdowns and the duration of the current operation.
[0030] After the first capacity demand calculation after operation is completed, the air conditioner outdoor unit is controlled based on the calculated capacity demand.
[0031] Furthermore, whether the unit is shut down is detected in real time. If the unit is shut down during operation, the number of shutdowns n, the evaporation pressure Pen just before the shutdown, and the duration of the current operation Mn are recorded and stored. Only the data of the most recent 10 times are stored, that is, n≤10.
[0032] In this embodiment, specifically: the updating of the target evaporation pressure based on the shutdown parameters and the evaporation pressure just before the shutdown also includes: judging whether the evaporation pressure just before the shutdown is less than the evaporation pressure just before the last shutdown, and if so, taking the evaporation pressure just before the current shutdown as the target evaporation pressure; otherwise, obtaining the average pressure value based on the evaporation pressure just before the current shutdown to update the target evaporation pressure according to the average pressure value.
[0033] Among them, it is then determined whether the evaporation pressure Pen before this shutdown is less than the evaporation pressure Pe(n-1) before the previous shutdown. If it is less than, it means that the user may have lowered the set temperature of the room or changed the environment of the room, such as drawing the curtains or closing the doors and windows, causing the temperature of the room to drop rapidly, and the evaporation pressure also drops rapidly. At this time, it is impossible to determine which of the two situations it is. Therefore, the first possibility is taken as the priority, and the user's setting requirements are prioritized. The target evaporation temperature Pet is updated to Pen, and then the initial step is returned.
[0034] If it is greater than or equal to, it means that the unit output capacity may be too large or the user has increased the room set temperature or the indoor environment has changed, such as drawing the curtains, opening the doors and windows, etc. Similarly, it is impossible to determine which possibility it is at this time, so the first two possibilities are given priority, and the target evaporation temperature is increased to reduce the output of the compressor capacity. The specific method is to calculate the average value Pev (i.e. the pressure average value) of the evaporation temperature Pen before the n-time shutdown.
[0035] In this embodiment, specifically: updating the target evaporation pressure according to the pressure average value includes: calculating the target parameters according to the pressure average value, the evaporation pressure just before the current shutdown, the evaporation pressure before the last shutdown, the number of shutdowns and the current operation duration, so as to update the target evaporation pressure based on the target parameters.
[0036] Among them, after the pressure average value calculation is completed in the previous step, Pev is included in the calculation of X. The new target evaporation pressure is Pet+X.
[0037] For example, if there are 8 shutdowns in total, that is, n=8, Pe8=8.1, Pev=7.6, Pe7=7.4, Mn=25, Mn-1=15, and X is substituted into the formula to obtain X=0.42.
[0038] Change n to 2, keep other conditions unchanged, and substitute into the X formula to calculate X = 3.16. It can be seen that the smaller n is, the larger X is, and the greater the increase in Pet is, which means that in the early stage of the unit operation, the response of the energy demand adjustment will be very fast and the temperature conditions desired by the user can be quickly achieved. The larger n is, the smaller X is, and the response of the energy demand adjustment will be slower, which means that after the unit has been running for a long time, in order to prevent the room temperature from fluctuating too much, more precise and slow adjustments are required.
[0039] Change Mn to 10, keep other conditions unchanged, and substitute into the X formula to calculate X=6.32. It can be seen that the smaller the difference between Mn and Mn-1, the larger the X value, the shorter the unit operation time, and the higher the frequency of shutdown, indicating that the unit's capacity output is much greater than the room load. At this time, it is necessary to quickly increase the target evaporation pressure and reduce the compressor capacity output. On the contrary, it means that the unit has been running for a long time, the room load and the compressor output capacity are not much different, and the room temperature tends to be stable, and more precise and slow adjustment is required.
[0040] In this embodiment, specifically: the operating parameters include at least the current operating duration and the outdoor fan; the updating of the target evaporating pressure based on the operating parameters and the compression ratio of the compressor includes: real-time detection of whether the current operating duration is greater than or equal to a preset time; if so, detection of whether the outdoor fan is greater than or equal to a preset speed; otherwise, the target evaporating pressure is not updated; wherein, if the outdoor fan is greater than the preset speed, a compression ratio judgment is performed; otherwise, the outdoor fan is adjusted to the preset speed, and a compression ratio judgment is performed.
[0041] If the unit is in a non-shutdown state, it is detected whether the current running duration has reached S minutes (i.e., the preset time). If not, it returns to the initial step. If it has reached, it means that the unit output capacity is insufficient, the user's set temperature has not been reached, and the indoor unit has not transmitted a shutdown signal. At this time, it is further detected whether the speed of the outdoor fan has reached the maximum. If it has reached the maximum, the next step of judgment is performed. If not, it is opened to the maximum to continue to increase the condensing effect and thus improve the cooling capacity, and then the next step of judgment is performed.
[0042] In this embodiment, specifically: the compression ratio judgment includes: judging whether the compression ratio is less than a preset compression ratio threshold value, and if so, updating it based on the current target evaporation pressure; otherwise, not updating the target evaporation pressure.
[0043] In this embodiment, specifically: after the updating based on the current target evaporation pressure, the method further includes: performing a zeroing operation on the timer.
[0044] Among them, it is judged whether the compression ratio e of the compressor is less than the preset value e1 (i.e., the preset compression ratio threshold value). This step is to ensure the operating reliability of the compressor. If the compressor is too large and exceeds e1, for example, e1=7 is set, and e=7.2 is detected, it means that the compressor capacity output cannot be further increased, otherwise it may exceed the safe operating range of the compressor, and then return to the initial step. If e is less than e1, it means that the compressor capacity output can be increased, and the target evaporation pressure Pet-1 is used as the new target evaporation pressure Pet. After that, the timer is reset and the initial step is returned.
[0045] Based on the same concept, Figure 2 As shown, the present application also provides an air conditioner outdoor unit control system, comprising:
[0046] The detection module is used to detect in real time whether the air conditioner outdoor unit is in a shutdown state. If so, the target evaporation pressure is updated based on the shutdown parameters and the evaporation pressure just before the shutdown; otherwise, the target evaporation pressure is updated based on the operating parameters and the compression ratio of the compressor.
[0047] And, a control module is used to obtain a target evaporation pressure and calculate a capacity requirement according to the target evaporation pressure, so as to control the current air-conditioning outdoor unit according to the capacity requirement.
[0048] Based on the same concept, the present application also provides a computer-readable storage medium storing a computer program, which implements the above-mentioned air conditioner outdoor unit control method when executed by a processor.
[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A method for controlling an outdoor unit of an air conditioner, characterized in that: include: Obtaining a target evaporation pressure, and calculating a capacity requirement according to the target evaporation pressure, so as to control a current air conditioner outdoor unit according to the capacity requirement; Real-time detection is performed to determine whether the air conditioner outdoor unit is in shutdown state. If so, the target evaporation pressure is updated based on shutdown parameters and the evaporation pressure immediately before shutdown; otherwise, the target evaporation pressure is updated based on operating parameters and the compression ratio of the compressor.
2. The air conditioner outdoor unit control method according to claim 1, characterized in that: The step of obtaining the target evaporation pressure comprises: After power-on operation, it is determined whether the air conditioner outdoor unit is powered on for the first time. If so, the preset initial evaporation pressure is used as the target evaporation pressure; otherwise, the latest evaporation pressure is obtained as the target evaporation pressure.
3. The air conditioner outdoor unit control method according to claim 2, characterized in that: The updating of the target evaporation pressure based on the shutdown parameter and the evaporation pressure immediately before the shutdown includes: The shutdown parameters are obtained based on the shutdown state, and the evaporation pressure just before the current shutdown is obtained; wherein the shutdown parameters at least include the number of shutdowns and the duration of the current operation.
4. The air conditioner outdoor unit control method according to claim 3, characterized in that: The updating of the target evaporation pressure based on the shutdown parameter and the evaporation pressure immediately before the shutdown further includes: Determine whether the evaporation pressure at the last moment is less than the evaporation pressure before the last shutdown. If so, use the evaporation pressure at the last moment before the current shutdown as the target evaporation pressure; otherwise, obtain the average pressure value based on the evaporation pressure at the last moment before the current shutdown to update the target evaporation pressure according to the average pressure value.
5. The air conditioner outdoor unit control method according to claim 4, characterized in that: The updating of the target evaporation pressure according to the pressure average value includes: The target parameter is calculated according to the pressure average value, the evaporation pressure just before the current shutdown, the evaporation pressure before the last shutdown, the number of shutdowns and the current operation duration, so as to update the target evaporation pressure based on the target parameter.
6. The air conditioner outdoor unit control method according to claim 2, characterized in that: The operating parameters include at least the current operating duration and the outdoor fan; The updating of the target evaporation pressure based on the operating parameters and the compression ratio of the compressor comprises: Real-time detection of whether the current operation duration is greater than or equal to a preset time; if so, detection of whether the outdoor fan speed is greater than or equal to a preset speed; otherwise, the target evaporation pressure is not updated; Among them, if the outdoor fan speed is greater than the preset speed, the compression ratio judgment is performed; otherwise, the outdoor fan is adjusted to the preset speed and the compression ratio judgment is performed.
7. The air conditioner outdoor unit control method according to claim 6, characterized in that: The compression ratio determination includes: It is determined whether the compression ratio is less than a preset compression ratio threshold value. If so, the target evaporation pressure is updated based on the current target evaporation pressure; otherwise, the target evaporation pressure is not updated.
8. The air conditioner outdoor unit control method according to claim 7, characterized in that: After the updating based on the current target evaporation pressure, the method further includes: performing a zeroing operation on the timer.
9. A system using the air conditioner outdoor unit control method according to any one of claims 1 to 8, characterized in that: include: A detection module, used for detecting in real time whether the air conditioner outdoor unit is in a shutdown state, and if so, updating the target evaporation pressure based on the shutdown parameters and the evaporation pressure just before the shutdown; otherwise, updating the target evaporation pressure based on the operating parameters and the compression ratio of the compressor; The control module is used to obtain a target evaporation pressure and calculate a capacity requirement according to the target evaporation pressure, so as to control a current air conditioner outdoor unit according to the capacity requirement.
10. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the air conditioner outdoor unit control method according to any one of claims 1 to 8 is implemented.