CN114353282A - Multi-split air conditioner control method and multi-split air conditioner - Google Patents
Multi-split air conditioner control method and multi-split air conditioner Download PDFInfo
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Abstract
The invention discloses a multi-online control method and a multi-online control system, wherein when the outdoor unit is judged to need to be shut down, the outdoor unit which needs to be shut down is controlled to be shut down, and a deep shut-down mode is entered; the outdoor unit is in the deep shutdown mode, and all electric equipment of the outdoor unit is powered off, so that the power consumption is reduced, energy is saved, and the use cost is reduced.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a multi-split air conditioner control method and a multi-split air conditioner.
Background
In recent years, the share of the multi-split air conditioner market has been increasing, and energy saving has become an important issue.
For a traditional multi-split air conditioner, when a plurality of outdoor units are connected and operated, when the reduction of the operation load of a system is detected, namely when part of indoor units have no refrigeration or heating requirements, a main program sends out an instruction to stop part of the outdoor units, the power supply of a press of the part of the outdoor units is cut off (other parts are still in a power supply state), and when a long-term part of load of a unit operates, the control mode can cause energy waste in the aspect of standby; or when the whole machine stops, the machine is in a power-on standby mode, and energy waste can be caused under the power supply mode of relevant parts of the standby external machine.
At present, the multi-connected air conditioning unit is widely used in buildings such as libraries and office buildings, and the operation reliability of the multi-connected air conditioning unit and the use comfort of users need to be guaranteed. In practical application, the client startup loads are basically in a low-load region, and the large data research shows that the commercial multi-online system is in a standby state 76.5% of the time. In a multi-split air conditioner control system, a traditional multi-split air conditioner can perform standby control on part of external units according to the load requirement of an internal unit side, when the external units are connected, part of rooms are occupied for a long time, and if the external units do not need to be completely started, the external units which are not started can enter a standby state, so that unnecessary external unit standby power consumption during operation of part of loads is reduced to the maximum extent; for a traditional combined multi-split air conditioner system, a control circuit board related to a standby external unit is basically in a power supply standby state, and therefore energy consumption of the standby external unit is inevitably caused.
When the traditional multi-split air conditioner is installed and used, the startup load of a user is always in a lower load range most of the time, so that part of the outdoor units are in a shutdown standby state for a long time, however, the standby outdoor units are in a power-on state due to the fact that the components of the unit are controlled by the unit, and a large amount of power loss is caused by long-time accumulated shutdown standby; the result is a waste of energy.
When the whole air conditioner system stops, a user cannot intentionally turn off the main switch of the air conditioner system, so that the external unit system is still in a power-on standby mode, and energy waste is caused.
Therefore, how to control the outdoor units to reduce the power consumption of the multi-split air conditioner is very important.
Disclosure of Invention
The invention provides a multi-connected air conditioner control method, which reduces the power consumption and saves the energy.
In order to solve the technical problems, the invention adopts the following technical scheme:
a multi-split control method comprises the following steps:
judging whether the outdoor unit needs to be shut down or not;
controlling an outdoor unit needing to be shut down to shut down and entering a deep shut-down mode; and when the outdoor unit is in a deep shutdown mode, all electric equipment of the outdoor unit is powered off.
Further, the determining whether the outdoor unit needs to be stopped specifically includes:
acquiring the load rate R of the starting indoor unit;
determining the number n of outdoor units needing to be shut down according to the obtained load rate R of the starting indoor units;
and selecting n outdoor units, judging that the selected n outdoor units need to be stopped, and judging that the other outdoor units do not need to be stopped.
Still further, the determining the number n of the outdoor units needing to be shut down according to the obtained load factor R of the started indoor units specifically includes:
rounding (1-R) N downwards to obtain the number N of outdoor units needing to be shut down;
and N is the number of all outdoor units of the multi-split air conditioner.
Further, the determining the number n of the outdoor units needing to be shut down according to the obtained load rate R of the started indoor units specifically includes:
when R is less than 25%, rounding 75% N downwards to obtain the number N of the outdoor units needing to be shut down;
when R is more than or equal to 25% and less than 50%, rounding 50% N downwards to obtain the number N of outdoor units needing to be shut down;
when R is more than or equal to 50% and less than 75%, rounding 25% N downwards to obtain the number N of outdoor units needing to be shut down;
when R is more than or equal to 75 percent, the number n of the outdoor units needing to be shut down is 0;
and N is the number of all outdoor units of the multi-split air conditioner.
Still further, select n outdoor units, judge that n outdoor units selected need to shut down, other outdoor units need not to shut down, specifically include:
acquiring the accumulated running time of each outdoor unit;
and selecting the n outdoor units with the longest accumulated operation time, judging that the n outdoor units with the longest accumulated operation time need to be stopped, and judging that the rest outdoor units do not need to be stopped.
Further, select n outdoor units, judge that n outdoor units selected need to shut down, other outdoor units need not to shut down, specifically include:
acquiring the number n0 of the current outdoor unit shutdowns;
if n0 is less than n, judging that n0 outdoor units which are shut down still need to be shut down, judging that n-n0 outdoor units which have the longest accumulated running time in the outdoor units in the starting state need to be shut down, and judging that the other outdoor units do not need to be shut down;
if n0 is larger than n, judging that the n outdoor units with the longest accumulated running time in the n0 stopped outdoor units need to be stopped, and judging that the rest outdoor units do not need to be stopped;
if n0 is equal to n, the on/off state of each outdoor unit is maintained.
Still further, the outdoor unit enters a deep shutdown mode after being shut down for a first set time period.
Furthermore, when the outdoor unit in the deep shutdown mode needs to be started, the heating belt of the outdoor unit is powered firstly, and then the compressor is powered after a second set time.
And further, when the outdoor unit in the deep shutdown mode needs to be started, detecting the outdoor environment temperature, supplying power to the heating belt of the outdoor unit when the detected outdoor environment temperature is smaller than the temperature threshold value, and supplying power to the compressor after a second set time.
Based on the design of the multi-online control method, the invention provides a multi-online control method; the multi-split control method comprises the following steps:
judging whether the outdoor unit needs to be shut down or not;
controlling an outdoor unit needing to be shut down to shut down and entering a deep shut-down mode; and when the outdoor unit is in a deep shutdown mode, all electric equipment of the outdoor unit is powered off.
Compared with the prior art, the invention has the advantages and positive effects that: according to the multi-split air conditioner control method and the multi-split air conditioner, when the outdoor unit is judged to need to be stopped, the outdoor unit needing to be stopped is controlled to be stopped, and a deep stop mode is entered; the outdoor unit is in the deep shutdown mode, and all electric equipment of the outdoor unit is powered off, so that the power consumption is reduced, energy is saved, and the use cost is reduced.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a flow chart of an embodiment of a multi-split control method proposed by the present invention;
fig. 2 is a flow chart of another embodiment of the multi-split control method provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a multi-split air conditioner control method and a multi-split air conditioner, aiming at the technical problem of high power consumption of the existing multi-split air conditioner, and controlling an outdoor unit needing to be shut down to enter a deep shut-down mode so as to save energy and reduce consumption. Hereinafter, a multi-split control method and a multi-split system according to the present invention will be described in detail with reference to the accompanying drawings.
The multi-split air conditioner comprises a plurality of outdoor units connected in parallel and a plurality of indoor units connected in parallel.
Several outdoor units, i.e. one or more outdoor units. The outdoor units are connected in parallel, namely, liquid pipes of the outdoor units are connected in parallel to form a total liquid pipe; the air pipes of the outdoor units are connected in parallel to form a main air pipe.
The indoor units are also connected in parallel. The liquid pipe of each indoor machine is connected with the main liquid pipe, and the air pipe of each indoor machine is connected with the main air pipe.
The first embodiment,
The embodiment provides a multi-split control method, which mainly comprises the following steps, and is shown in fig. 1.
Step S1: and judging whether the outdoor unit needs to be stopped or not.
And judging whether each outdoor unit of the multi-split air conditioner needs to be stopped or not.
Step S2: when the outdoor unit is judged to need to be shut down, the outdoor unit needing to be shut down is controlled to be shut down, and a deep shut-down mode is entered; and when the outdoor unit is in a deep shutdown mode, all electric equipment of the outdoor unit is powered off.
Judging whether each outdoor unit of the multi-split air conditioner needs to be shut down, and controlling the outdoor unit to be shut down and entering a deep shut down mode when the outdoor unit needs to be shut down; and when the outdoor unit is in a deep shutdown mode, all electric equipment of the outdoor unit is powered off. And when the outdoor unit does not need to be stopped, the outdoor unit which does not need to be stopped keeps the starting state or enters the starting state.
The electric equipment of the outdoor unit comprises a compressor, a heating belt, a fan, a circuit board, a driver and the like. When the outdoor unit is shut down, the electric equipment of the outdoor unit only stops running and is not powered off; when the outdoor unit enters a deep shutdown mode, all the electric equipment of the outdoor unit is powered off, including a compressor, a heating belt, a fan, a circuit board, a driver and the like, so that the power consumption is reduced, energy is saved, and the use cost of a user is reduced.
Therefore, in the multi-split control method of the embodiment, when the outdoor unit is judged to need to be stopped, the outdoor unit needing to be stopped is controlled to be stopped, and a deep stop mode is entered; the outdoor unit is in the deep shutdown mode, and all electric equipment of the outdoor unit is powered off, so that the power consumption is reduced, energy is saved, and the use cost is reduced.
In step S1, the method of determining whether the outdoor unit needs to be stopped includes the following steps, which are shown in fig. 2.
Step S11: and acquiring the load rate R of the starting indoor unit.
Step S12: and determining the number n of the outdoor units needing to be shut down according to the acquired load rate R of the starting indoor units.
Step S13: and selecting n outdoor units, judging that the selected n outdoor units need to be stopped, and judging that the other outdoor units do not need to be stopped.
Then, step S2 is executed, and the selected n outdoor units needing shutdown are controlled to be shutdown, and the n outdoor units enter a deep shutdown mode. And the outdoor unit which does not need to be stopped keeps or enters the starting state.
In this embodiment, the number of outdoor units that need to be powered on can be determined according to the load factor R of the powered on indoor units, so as to ensure the normal operation of the multi-split air conditioner, and further determine the number n of outdoor units that need to be powered off.
Therefore, the steps S11 to S13 are designed, the number n of the outdoor units that need to be shut down can be accurately determined by the load rate R of the startup indoor units, n outdoor units are selected to be shut down and enter a deep shut down mode, so that power consumption is reduced, normal operation of the multi-split air conditioner is guaranteed, load requirements of the startup indoor units are guaranteed, and cooling and heating requirements of users are guaranteed.
The multi-split control method of the embodiment judges the number of the outdoor units in starting and stopping according to the load rate of the indoor units in starting, and achieves the best energy-saving effect while ensuring the requirements of the indoor units, ensuring reliable operation and meeting the comfort of users.
As a preferred design of this embodiment, in step S12, determining the number n of outdoor units that need to be stopped according to the obtained load factor R of the turned-on indoor units specifically includes:
calculating (1-R) N, and rounding (1-R) N downwards to obtain the number N of the outdoor units needing to be shut down; wherein, N is the number of all outdoor units of the multi-split air conditioner.
That is, N is the largest integer of not more than (1-R) × N.
When (1-R) N is an integer, the number N of outdoor units needing to be stopped is (1-R) N;
when (1-R) N is a decimal, directly discarding the decimal, namely, rounding the decimal downwards to obtain the number N of the outdoor units needing to be shut down, which aims to firstly meet the requirement of the starting indoor units, ensure that the starting indoor units can normally run, ensure the normal refrigeration and heating of users and avoid the influence on the normal use of the users caused by the excessive number of the shut-down outdoor units.
If (1-R) × N is 2, the number N of outdoor units that need to be stopped is 2.
If (1-R) × N is 3.6, the number N of outdoor units that need to be stopped is 3.
Therefore, the number N of the outdoor units needing to be stopped is obtained by rounding (1-R) N downwards; the method has the advantages that the calculation is convenient, the number n of the outdoor units needing to be shut down can be simply and conveniently obtained, and the requirement of starting the indoor units can be met.
As another preferred design of this embodiment, in step S12, determining the number n of outdoor units that need to be stopped according to the obtained load factor R of the turned-on indoor units specifically includes:
(1) and when R is less than 25%, rounding 75% N downwards to obtain the number N of the outdoor units needing to be stopped.
That is, N is the largest integer of 75% N or less.
(2) And when R is more than or equal to 25% and less than 50%, rounding 50% N downwards to obtain the number N of the outdoor units needing to be stopped.
That is, N is the largest integer of 50% N or less.
(3) And when R is more than or equal to 50% and less than 75%, rounding 25% N downwards to obtain the number N of the outdoor units needing to be stopped.
That is, N is the largest integer of 25% N or less.
(4) And when the ratio of R to 75% is more than or equal to R, the number n of the outdoor units needing to be stopped is 0.
Namely, when the load rate of the indoor units is high, all the outdoor units are opened, and the normal refrigerating and heating requirements are ensured.
Wherein, N is the number of all outdoor units of the multi-split air conditioner.
After the load factor R of the indoor unit is calculated through the above steps (1) to (4), the value of n is determined directly according to the range of R. The method has the advantages that the calculation is convenient, the number n of the outdoor units needing to be shut down can be simply and conveniently obtained, and the requirement of starting the indoor units can be met.
Suppose that the multi-split air conditioner has 4 outdoor units, namely N is 4.
When R < 25%, 75% N-3, then N-3;
when R is more than or equal to 25% and less than 50%, N is 2 when 50% is equal to 2, and N is equal to 2;
when R is more than or equal to 50% and less than 75%, N is 25% and N is 1, then N is 1;
when 75% R is less than or equal to R, n is 0.
Suppose that the multi-split air conditioner has 6 outdoor units, namely N is 6.
When R < 25%, 75% N is 4.5, then N is 4;
when R is more than or equal to 25% and less than 50%, N is 3 and N is 3;
when R is more than or equal to 50% and less than 75%, N is 25%. multidot.N is 1.5, then N is 1;
when 75% R is less than or equal to R, n is 0.
As a preferable design of this embodiment, in step S13, n outdoor units are selected, and it is determined that the selected n outdoor units need to be stopped and the remaining outdoor units do not need to be stopped, including the following steps:
and (13-11) acquiring the accumulated running time of each outdoor unit.
(13-12) selecting the n outdoor units with the longest accumulated operation time, and judging that the n outdoor units with the longest accumulated operation time need to be stopped, and the rest outdoor units do not need to be stopped.
And then controlling the selected n outdoor units with the longest accumulated running time to stop, and enabling the n outdoor units to enter a deep stop mode. The rest N-N outdoor units do not need to be stopped, but keep the starting state or enter the starting state.
Through the design of (13-11) - (13-12), N outdoor units with the longest accumulated operation time are selected from all the N outdoor units of the multi-split air-conditioning system according to the length of the accumulated operation time, the N outdoor units are judged to be required to be stopped, and the rest N-N outdoor units are not required to be stopped, so that the working time and the service life of the N outdoor units are balanced, and the service life of the whole multi-split air-conditioning system is prolonged.
As another preferred design of this embodiment, in step S13, n outdoor units are selected, and it is determined that the selected n outdoor units need to be stopped and the remaining outdoor units do not need to be stopped, specifically including the following steps:
(13-21) acquiring the current outdoor unit shutdown number n 0.
The number n0 of shut-down units here includes the outdoor unit that has already been in the deep shut-down mode, and the outdoor unit that has been shut down but has not yet entered the deep shut-down mode.
(13-22) if n0 is less than n, that is, the number of currently stopped outdoor units is small, and the number of the currently stopped outdoor units needs to be increased, determining that n0 outdoor units which have been stopped still need to be stopped, determining that n-n0 outdoor units which have the longest accumulated running time in the outdoor units in the on state need to be stopped, and the rest outdoor units do not need to be stopped.
If the number of the outdoor units which are shut down currently is too small, n0 outdoor units which are in the shut down state originally continue to be shut down, and then n-n0 units with the longest accumulated running time are selected from the outdoor units in the start-up state, wherein the n-n0 outdoor units need to be changed into the shut down state from the start-up state, and the rest outdoor units in the start-up state do not need to be shut down and still keep the start-up state.
(13-23) if n0 is greater than n, that is, there are more outdoor units currently stopped and the outdoor units need to be increased, determining that the n outdoor units with the longest accumulated running time among the n0 outdoor units already stopped need to be stopped, and the rest of the outdoor units do not need to be stopped.
If the number of the outdoor units which are shut down currently is too many, n outdoor units with the longest accumulated running time are selected from n0 outdoor units which are shut down currently, the n outdoor units need to be shut down continuously, and the rest outdoor units do not need to be shut down but enter a starting state.
(13-24) if n0 is n, indicating that the number of currently stopped outdoor units is appropriate, maintaining the on/off state of each outdoor unit.
Through the design of (13-21) - (13-24), the original start-stop state of each outdoor unit is maintained as much as possible in all the N outdoor units of the multi-split air conditioner, so that the multi-split air conditioner can be ensured to operate stably; when the starting and stopping states of the outdoor units need to be changed, the outdoor unit with the longest accumulated running time is selected to be stopped, and the working time and the service life of the N outdoor units can be balanced, so that the service life of the whole multi-split air conditioner is prolonged.
In this embodiment, the outdoor unit enters the deep shutdown mode after being shut down for a first set time (e.g., 2 minutes), and the outdoor unit is buffered to prevent sudden power failure and damage to the electric devices, so that the outdoor unit is smoothly transitioned to the deep shutdown mode.
In this embodiment, when the outdoor unit in the deep shutdown mode needs to be turned on, the heating tape of the outdoor unit is powered first, the compressor is powered after a second set time period (e.g., after 2 minutes), and then the outdoor unit is turned on. And firstly supplying power to the heating belt to preheat the heating belt, and supplying power to the compressor after the second set time of power supply to the heating belt so as to ensure the normal start of the compressor.
As another preferable design of this embodiment, when the outdoor unit in the deep shutdown mode needs to be turned on, the outdoor ambient temperature is detected first. And when the detected outdoor environment temperature is smaller than the temperature threshold, supplying power to the heating belt of the outdoor unit, supplying power to the compressor after the heating belt is supplied with power for a second set time (such as 2 minutes) so as to ensure that the compressor is normally started, and then starting the outdoor unit. If the detected outdoor environment temperature is not less than the temperature threshold value, the outdoor environment temperature is higher, the power is not required to be supplied to the heating belt, and the power is directly supplied to the compressor, so that the energy is saved and the consumption is reduced.
Example II,
Based on the design of the multi-split control method in the first embodiment, the second embodiment provides a multi-split control method in the first embodiment.
According to the multi-split air conditioner, when the outdoor unit is judged to need to be shut down, the outdoor unit needing to be shut down is controlled to be shut down, and a deep shut-down mode is entered; the outdoor unit is in the deep shutdown mode, and all electric equipment of the outdoor unit is powered off, so that the power consumption is reduced, energy is saved, and the use cost is reduced.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. A multi-split control method is characterized in that: the method comprises the following steps:
judging whether the outdoor unit needs to be shut down or not;
controlling an outdoor unit needing to be shut down to shut down and entering a deep shut-down mode; and when the outdoor unit is in a deep shutdown mode, all electric equipment of the outdoor unit is powered off.
2. A multi-split control method as defined in claim 1, wherein: the judging whether the outdoor unit needs to be stopped specifically comprises the following steps:
acquiring the load rate R of the starting indoor unit;
determining the number n of outdoor units needing to be shut down according to the obtained load rate R of the starting indoor units;
and selecting n outdoor units, judging that the selected n outdoor units need to be stopped, and judging that the other outdoor units do not need to be stopped.
3. A multi-split control method as defined in claim 2, wherein: the method for determining the number n of the outdoor units needing to be shut down according to the acquired load rate R of the starting indoor units specifically comprises the following steps:
rounding (1-R) N downwards to obtain the number N of outdoor units needing to be shut down;
and N is the number of all outdoor units of the multi-split air conditioner.
4. A multi-split control method as defined in claim 2, wherein: the method for determining the number n of the outdoor units needing to be shut down according to the acquired load rate R of the starting indoor units specifically comprises the following steps:
when R is less than 25%, rounding 75% N downwards to obtain the number N of the outdoor units needing to be shut down;
when R is more than or equal to 25% and less than 50%, rounding 50% N downwards to obtain the number N of outdoor units needing to be shut down;
when R is more than or equal to 50% and less than 75%, rounding 25% N downwards to obtain the number N of outdoor units needing to be shut down;
when R is more than or equal to 75 percent, the number n of the outdoor units needing to be shut down is = 0;
and N is the number of all outdoor units of the multi-split air conditioner.
5. A multi-split control method as defined in claim 2, wherein: select n outdoor units, judge that n outdoor units of selecting need to shut down, other outdoor units need not to shut down, specifically include:
acquiring the accumulated running time of each outdoor unit;
and selecting the n outdoor units with the longest accumulated operation time, judging that the n outdoor units with the longest accumulated operation time need to be stopped, and judging that the rest outdoor units do not need to be stopped.
6. A multi-split control method as defined in claim 2, wherein: select n outdoor units, judge that n outdoor units of selecting need to shut down, other outdoor units need not to shut down, specifically include:
acquiring the number n0 of the current outdoor unit shutdowns;
if n0 is less than n, judging that n0 outdoor units which are shut down still need to be shut down, judging that n-n0 outdoor units which have the longest accumulated running time in the outdoor units in the starting state need to be shut down, and judging that the other outdoor units do not need to be shut down;
if n0 is larger than n, judging that the n outdoor units with the longest accumulated running time in the n0 stopped outdoor units need to be stopped, and judging that the rest outdoor units do not need to be stopped;
if n0= n, the on-off state of each outdoor unit is maintained.
7. A multi-split control method as defined in any one of claims 1 to 6, wherein: the outdoor unit enters a deep shutdown mode after being shut down for a first set time.
8. A multi-split control method as defined in any one of claims 1 to 6, wherein: when the outdoor unit in the deep shutdown mode needs to be started, the heating belt of the outdoor unit is powered firstly, and then the compressor is powered after the second set time.
9. A multi-split control method as defined in claim 8, wherein: when the outdoor unit in the deep shutdown mode needs to be started, the outdoor environment temperature is detected firstly, when the detected outdoor environment temperature is smaller than the temperature threshold value, the heating belt of the outdoor unit is powered, and the compressor is powered after the second set time.
10. A multi-split air conditioner is characterized in that: a multi-split control method as claimed in any one of claims 1 to 9.
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| CN114353282B (en) | 2023-06-20 |
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