CN113237197A - Air conditioning unit and control method thereof - Google Patents
Air conditioning unit and control method thereof Download PDFInfo
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- CN113237197A CN113237197A CN202110602537.5A CN202110602537A CN113237197A CN 113237197 A CN113237197 A CN 113237197A CN 202110602537 A CN202110602537 A CN 202110602537A CN 113237197 A CN113237197 A CN 113237197A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 177
- 238000010438 heat treatment Methods 0.000 claims description 91
- 238000005057 refrigeration Methods 0.000 claims description 62
- 238000001816 cooling Methods 0.000 claims description 27
- 238000004590 computer program Methods 0.000 claims description 4
- 239000000243 solution Substances 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners and aims to solve the problem that the temperature fluctuation of a target space is large in the operation process of the existing module air conditioning unit. To this end, the present invention provides an air conditioning unit and a control method thereof, the air conditioning unit including a plurality of sets of heat pump systems and a water circulation circuit for transferring heat between a heat exchanger of the heat pump system and a target space, the control method including: detecting the water inlet temperature of the water inlet ends of a plurality of groups of heat pump systems in the water circulation loop; comparing the inlet water temperature with a first preset temperature and a second preset temperature; selectively adjusting the number of the heat pump systems to be started according to the comparison result; wherein the first preset temperature and the second preset temperature are determined according to the set inlet water temperature and the preset deviation, and the preset deviation can be adjusted in the use stage. Therefore, the condition that the heat pump system is frequently started and stopped is avoided, the starting and stopping frequency of the heat pump system is reduced, and the temperature fluctuation of a target space in the running process of the air conditioning unit is reduced.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides an air conditioning unit and a control method thereof.
Background
At present, the module air conditioning unit is widely applied to places such as a large supermarket, a hotel, an office building, a factory building and the like. The single module air conditioner comprises a plurality of small systems, and each small system comprises a refrigerating/heating system consisting of a compressor. In order to meet the requirement of the refrigerating/heating capacity of the project and further expand the capacity of the unit, a plurality of module machines are expanded into one unit in a bus communication mode in the project, so that the unit formed by the plurality of module machines is called a large system, and the most common module unit is formed by 16 module machines. At present, the energy control of the modular unit is mainly based on the inlet water temperature and the set temperature, which is preset in the manufacturing stage, to regulate the number of compressors to be started. In the actual use process, the number of the started compressors is adjusted according to the comparison result of the inlet water temperature and the set temperature, the compressors are frequently started, and the temperature fluctuation of the target space of the air conditioning unit is large.
Therefore, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the temperature fluctuation of the target space is large in the operation process of the existing modular air conditioning unit, in one aspect, the present invention provides a control method for an air conditioning unit, where the air conditioning unit includes multiple sets of heat pump systems and a water circulation loop for transferring heat between a heat exchanger of the heat pump system and the target space, the control method includes: detecting the inlet water temperature of the inlet water ends of the multiple groups of heat pump systems in the water circulation loop; comparing the water inlet temperature with a first preset temperature and a second preset temperature; selectively adjusting the number of the heat pump systems to be started according to the comparison result; wherein the first preset temperature and the second preset temperature are determined according to a set inlet water temperature and a preset deviation, and the preset deviation can be adjusted in a use stage.
In a preferred technical solution of the above control method, in the cooling mode, the preset deviation includes a first cooling preset deviation and a second cooling preset deviation, the first preset temperature includes a first cooling preset temperature, the first cooling preset temperature is the set water inlet temperature plus the first cooling preset deviation, the second preset temperature includes a second cooling preset temperature, the second cooling preset temperature is the set water inlet temperature minus the second cooling preset deviation, and the step of selectively adjusting the number of the heat pump systems to be turned on according to the comparison result includes: if the inlet water temperature is greater than or equal to the first refrigeration preset temperature, a group of heat pump systems is added; and if the inlet water temperature is less than or equal to the second refrigeration preset temperature, reducing and stopping one group of heat pump systems.
In a preferred embodiment of the above control method, the step of "selectively adjusting the number of the heat pump systems to be turned on according to the comparison result" further includes: if the inlet water temperature is higher than the second preset refrigeration temperature and lower than the first preset refrigeration temperature, detecting the change value of the inlet water temperature within a first preset time period; comparing the change value of the inlet water temperature with a first refrigeration preset change value and a second refrigeration preset change value; and selectively adjusting the quantity of the heat pump systems to be started according to the comparison result of the change value of the inlet water temperature and the first refrigeration preset change value and the second refrigeration preset change value.
In a preferred technical solution of the above control method, the step of selectively adjusting the number of the heat pump systems to be turned on according to a comparison result between the variation value of the inlet water temperature and the first refrigeration preset variation value and the second refrigeration preset variation value includes: if the variation value of the inlet water temperature is smaller than or equal to the first refrigeration preset variation value, a group of heat pump systems is added; if the variation value of the inlet water temperature is larger than the second preset refrigeration variation value, reducing and stopping one group of heat pump systems; and if the variation value of the inlet water temperature is greater than the first preset variation value of refrigeration and less than or equal to the second preset variation value of refrigeration, keeping the number of the heat pump units which are started at present unchanged.
In a preferred technical solution of the above control method, the first preset deviation of cooling is greater than the second preset deviation of cooling.
In the preferred technical scheme of the above control method, under the heating mode, the preset deviation includes a first heating preset deviation and a second heating preset deviation, the first preset temperature includes a first heating preset temperature, the first heating preset temperature is that the set water inlet temperature subtracts the first heating preset deviation, the second preset temperature includes a second heating preset temperature, the second heating preset temperature is that the set water inlet temperature adds the second heating preset deviation, and the step of selectively adjusting the number of the heat pump systems to be opened according to the comparison result includes: if the water inlet temperature is less than or equal to the first heating preset temperature, a group of heat pump systems is added; and if the water inlet temperature is greater than or equal to the second heating preset temperature, reducing and stopping one group of heat pump systems.
In a preferred embodiment of the above control method, the step of "selectively adjusting the number of the heat pump systems to be turned on according to the comparison result" further includes: if the inlet water temperature is higher than the first heating preset temperature and lower than the second heating preset temperature, detecting a change value of the inlet water temperature within a second preset time; comparing the change value of the inlet water temperature with a first heating preset change value and a second heating preset change value; and selectively adjusting the quantity of the heat pump systems to be started according to the comparison result of the change value of the inlet water temperature and the first heating preset change value and the second heating preset change value.
In a preferred technical solution of the above control method, the step of selectively adjusting the number of the heat pump systems to be turned on according to a comparison result between the variation value of the inlet water temperature and the first heating preset variation value and the second heating preset variation value includes: if the variation value of the inlet water temperature is smaller than or equal to the first heating preset variation value, a group of heat pump systems is added; if the variation value of the inlet water temperature is larger than the second heating preset variation value, reducing and stopping one group of heat pump systems; and if the variation value of the inlet water temperature is greater than the first heating preset variation value and less than or equal to the second heating preset variation value, keeping the number of the heat pump units which are started currently unchanged.
In a preferable embodiment of the control method, the first heating preset deviation is greater than the second heating preset deviation.
In the technical scheme of the invention, the air conditioning unit comprises a plurality of groups of heat pump systems and a water circulation loop used for transferring heat between a heat exchanger of the heat pump system and a target space, and the control method comprises the following steps: detecting the water inlet temperature of the water inlet ends of a plurality of groups of heat pump systems in the water circulation loop; comparing the inlet water temperature with a first preset temperature and a second preset temperature; selectively adjusting the number of the heat pump systems to be started according to the comparison result; wherein the first preset temperature and the second preset temperature are determined according to the set inlet water temperature and the preset deviation, and the preset deviation can be adjusted in the use stage.
The quantity of the heat pump systems is selectively adjusted by comparing the inlet water temperature with the first preset temperature and the second preset temperature determined according to the set inlet water temperature and the preset temperature deviation, and the quantity of the heat pump systems is adjusted when the inlet water temperature exceeds the temperature range related to the set temperature, so that the condition that the heat pump systems are frequently started and stopped due to the fact that the heat pump systems are selectively started or stopped according to the inlet water temperature and the set inlet water temperature is avoided, the frequency of starting and stopping the heat pump systems is reduced, the temperature fluctuation of a target space in the running process of the air conditioning unit is reduced, and the comfort level of the target space is improved. The preset deviation used for determining the first preset temperature and the second preset temperature can be adjusted in the use stage, so that the first preset temperature and the second preset temperature can be adjusted according to the actual application place and the requirements of different use stages, and the requirements of different places and use stages are met on the basis of reducing the temperature fluctuation of the target space.
In another aspect, the present invention further provides an air conditioning unit, including: a memory; a processor; and a computer program stored in the memory and configured to be executed by the processor to implement the control method of the air conditioning unit in any one of the above technical solutions.
It should be noted that the air conditioner has all the technical effects of the above control method, and details are not described herein.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a diagram of the main steps of the control method of the air conditioning unit of the present invention;
fig. 2 is a flow chart of a control method of an air conditioning unit according to a first embodiment of the present invention;
fig. 3 is a flow chart of a control method of an air conditioning unit according to a second embodiment of the invention.
Detailed Description
First, it should be understood by those skilled in the art that the embodiments described below are merely for explaining technical principles of the present invention, and are not intended to limit the scope of the present invention. For example, the control method of the air conditioning unit is suitable for an air source air conditioning unit, a water source air conditioning unit or other suitable air conditioning units. Such adjustments to the specific type of application object should not be construed as limiting the invention, but should be within the scope of the invention.
It should be noted that the terms "first" and "second" in the description of the present invention 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 term "connected" is to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication 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.
With reference to fig. 1, a method for controlling an air conditioning unit according to the present invention will be described. Fig. 1 is a main step diagram of a control method of an air conditioner according to the present invention.
Based on the problem that the temperature fluctuation of a target space is large in the operation process of the existing module air conditioning unit mentioned in the background technology, the invention provides a control method of the air conditioning unit. The air conditioning unit comprises a plurality of groups of heat pump systems and water circulation loops, each group of heat pump systems comprises a compressor, a first heat exchanger, a throttling element and a second heat exchanger, first heat exchange cavities of the compressor, the first heat exchanger, the throttling element and the second heat exchanger are connected in series through a refrigerant pipeline to form the refrigerant circulation loop, and a driving pump, a third heat exchanger arranged in a target space and a second heat exchange cavity of the second heat exchanger are connected through pipelines to form the water circulation loop. And a temperature sensor for detecting the temperature of the inlet water is arranged at the position of the second heat exchange cavity flowing to the second heat exchanger in the water circulation pipeline. The coolant flowing through the water circulation line may be water, an aqueous solution (such as an aqueous solution of sodium chloride, calcium chloride, ethylene glycol, or glycerol), or other suitable liquid capable of transferring heat.
As shown in fig. 1, the control method of the air conditioning unit of the present invention mainly includes the following steps:
and S100, detecting the water inlet temperature of the water inlet ends of the multiple groups of heat pump systems in the water circulation loop.
And S200, comparing the inlet water temperature with a first preset temperature and a second preset temperature.
The first preset temperature and the second preset temperature are determined according to the set water inlet temperature and the preset deviation. For example, when the air conditioning unit is turned on, a user sets the inlet water temperature and the preset deviation through a control panel of the air conditioning unit. And the control system of the air conditioning unit determines a first preset temperature and a second preset temperature according to the set inlet water temperature and the preset deviation.
And step S300, selectively adjusting the number of the heat pump systems to be started according to the comparison result.
According to the current temperature of the inlet water and the first preset temperature and the second preset temperature, the number of the heat pump systems which are started can be adjusted (such as the number of the heat pump systems which are started is increased or decreased) or the number of the heat pump systems which are started currently can be kept.
By the control method, the quantity of the heat pump systems is adjusted when the inlet water temperature exceeds the temperature range related to the set temperature, the situation that the heat pump systems are started and stopped frequently due to the fact that the heat pump systems are selectively started or stopped according to the inlet water temperature and the set inlet water temperature is avoided, the starting and stopping frequency of the heat pump systems is reduced, the temperature fluctuation of a target space in the running process of the air conditioning unit is reduced, and the comfort level of the target space is improved. The preset deviation used for determining the first preset temperature and the second preset temperature can be adjusted in the use stage, so that the first preset temperature and the second preset temperature can be adjusted according to the actual application place and the requirements of different use stages, and the requirements of different places and use stages are met on the basis of reducing the temperature fluctuation of the target space. For example, when the temperature-adjusting object of the air conditioning unit is a target space such as an office building, a large supermarket and the like, a user can set a large preset deviation, the reduction range of the starting and stopping frequency of a heat pump system in the air conditioning unit is relatively large, the starting and stopping frequency of the heat pump system is smaller, when the temperature-adjusting object of the air conditioning unit is a breeding place, the user can set a small preset deviation, the temperature in the target space can be kept in a temperature range with a small left and right deviation of a set inlet water temperature, the temperature in the target space is guaranteed to be more accurate, the temperature is more suitable for the growth of the breeding object (such as artificially bred baby fish and the like), and therefore the temperature adjusting requirements of different places are met on the basis that the starting and stopping frequency of the heat pump is reduced as much as possible. For a culture place, the sensitivity degrees of cultured objects to temperature in different growth stages are different, a smaller preset deviation can be set in the growth stage in which the cultured objects are sensitive to the temperature, and a larger preset deviation can be set in the growth stage in which the cultured objects are not sensitive to the temperature, so that the starting and stopping frequency of a heat pump system is reduced as much as possible on the basis of ensuring the comfort of the temperature of the growth environment of the cultured objects, and the service life of an air conditioning unit is prolonged.
A method of controlling an air conditioning unit according to a first embodiment of the present invention will be described with reference to fig. 2. Fig. 2 is a flowchart of a control method of an air conditioning unit according to a first embodiment of the present invention.
As shown in fig. 2, in the first embodiment of the present invention, the preset deviation includes a first refrigeration preset deviation and a second refrigeration preset deviation, the first preset temperature includes a first refrigeration preset temperature, the first refrigeration preset temperature is the set inlet water temperature plus the first refrigeration preset deviation, the second preset temperature includes a second refrigeration preset temperature, and the second refrigeration preset temperature is the set inlet water temperature minus the second refrigeration preset deviation. Wherein the set inlet water temperature, the first refrigeration preset deviation and the second refrigeration preset deviation are set by a user. The control method of the air conditioning unit comprises the following steps:
and S110, detecting the water inlet temperature of the water inlet ends of the multiple groups of heat pump systems in the water circulation loop in the refrigeration mode.
Step S210, determining whether the inlet water temperature is greater than or equal to a first preset refrigeration temperature, if so, performing step S310, and if not, performing step S220.
Step S220, determining whether the inlet water temperature is less than or equal to a second preset refrigeration temperature, if so, performing step S320, and if not, performing step S231.
And S231, detecting a change value of the inlet water temperature within a first preset time period.
If the first preset time is 5s, detecting the change value of the inlet water temperature within 5s after the inlet water temperature is judged to be less than the first refrigeration preset temperature and greater than the second refrigeration preset temperature. It should be noted that the first preset time period of 5s is only a specific setting manner, and may be adjusted in practical applications, for example, the first preset time period may be 4s, 8s, 11s, or other suitable time periods.
Step S232, determining whether the variation value of the inlet water temperature is less than or equal to a first preset variation value of refrigeration, if so, performing step S310, otherwise, performing step S233.
Step S233, determining whether the variation value of the inlet water temperature is greater than the second preset refrigeration temperature variation value, if so, performing step S320, and if not, performing step S330.
And S310, adding a group of heat pump systems.
And step S320, reducing and stopping the group of heat pump systems.
And step S330, keeping the number of the heat pump systems which are currently started unchanged.
That is, under the condition that the air conditioning unit operates in a refrigeration mode, the inlet water temperature of the inlet water ends of a plurality of groups of heat pump systems in the water circulation loop is detected; if the inlet water temperature is greater than or equal to the sum of the set inlet water temperature and the first refrigeration preset deviation, a group of heat pump systems are added; if the inlet water temperature is less than or equal to the difference between the set inlet water temperature and the second refrigeration preset deviation, reducing and stopping one group of heat pump systems; if the inlet water temperature is greater than the difference between the set inlet water temperature and the second preset refrigeration deviation and less than the sum of the set inlet water temperature and the first preset refrigeration deviation, further detecting the change value of the inlet water temperature within the first set time length, comparing the change value of the inlet water temperature with the first preset refrigeration change value and the second preset refrigeration change value, if the change value of the inlet water temperature is less than or equal to the first preset refrigeration change value, starting a group of heat pump systems, if the change value of the inlet water temperature is greater than the second preset refrigeration change value, reducing and stopping the group of heat pump systems, and if the inlet water temperature is greater than the first preset refrigeration change value and less than or equal to the second preset refrigeration change value, keeping the number of the currently started heat pump systems unchanged.
It should be noted that, the execution order of step S210 and step S220 may be changed, and the execution order of step S232 and step S233 may also be changed.
Through the arrangement, in the cooling mode, when the difference value between the inlet water temperature and the set inlet water temperature is relatively large, the group of heat pump systems is started or stopped in a decreasing mode, when the difference value between the inlet water temperature and the set inlet water temperature is relatively small, the change value of the inlet water temperature in the first set time length is further compared with the first refrigeration preset change value and the second refrigeration preset change value, the number of the started heat pump systems is selectively adjusted according to the comparison result, the number of the started heat pump systems can be more finely adjusted, and the adjustment of the target space temperature is more stable and reliable.
Preferably, the first refrigeration preset deviation is greater than the second refrigeration preset deviation. Through the arrangement, the conditions for increasing the heat pump system are more strict than the conditions for reducing the heat pump system, and the quantity of the heat pump systems which are started is reduced as much as possible on the basis of meeting the temperature setting requirements of users as much as possible in the running process of the unit, so that the energy consumption is reduced, and the heat pump system is more energy-saving and environment-friendly.
In another possible implementation, unlike the first embodiment, in the absence of steps S231, S232 and S233, when step S220 is executed, if the temperature of the inlet water is not less than or equal to the second preset cooling temperature, step S330 is executed, that is, the number of heat pump systems currently on is kept unchanged when the temperature of the inlet water is greater than the second preset cooling temperature and less than the first preset cooling temperature.
A method for controlling an air conditioning unit according to a second embodiment of the present invention will be described with reference to fig. 3. Fig. 3 is a flowchart of a control method of an air conditioning unit according to a second embodiment of the present invention.
As shown in fig. 3, in the second embodiment of the present invention, the preset deviation includes a first heating preset deviation and a second heating preset deviation, the first preset temperature includes a first heating preset temperature, the first heating preset temperature is the set inlet water temperature minus the first heating preset deviation, the second preset temperature includes a second heating preset temperature, and the second heating preset temperature is the set inlet water temperature plus the second heating preset deviation. Wherein the set inlet water temperature, the first heating preset deviation and the second heating preset deviation are all set by a user. The control method of the air conditioning unit comprises the following steps:
and S110, detecting the water inlet temperature of the water inlet ends of the multiple groups of heat pump systems in the water circulation loop in the heating mode.
Step S210, determining whether the inlet water temperature is less than or equal to a first heating preset temperature, if so, performing step S310, and if not, performing step S220.
Step S220, determining whether the inlet water temperature is greater than or equal to a second preset heating temperature, if so, performing step S320, and if not, performing step S231.
And S231, detecting the change value of the inlet water temperature within a second preset time period.
If the second preset time is 8s, detecting the change value of the inlet water temperature within 8s after the inlet water temperature is judged to be greater than the first heating preset temperature and less than the second heating preset temperature. It should be noted that the second preset time period of 8s is only a specific setting manner, and may be adjusted in practical applications, for example, the second preset time period may be 6s, 9s, 12s, or other suitable time periods.
Step S232, determining whether the variation value of the inlet water temperature is less than or equal to a first preset variation value for heating, if so, performing step S310, and if not, performing step S233.
Step S233, determining whether the variation value of the inlet water temperature is greater than the second preset heating temperature variation value, if so, performing step S320, and if not, performing step S330.
And S310, adding a group of heat pump systems.
And step S320, reducing and stopping the group of heat pump systems.
And step S330, keeping the number of the heat pump systems which are currently started unchanged.
That is to say, under the condition that the air conditioning unit operates in the heating mode, the water inlet temperature of the water inlet ends of the multiple groups of heat pump systems in the water circulation loop is detected; if the inlet water temperature is less than or equal to the difference between the set inlet water temperature and the first heating preset deviation, a group of heat pump systems are added; if the inlet water temperature is greater than or equal to the sum of the set inlet water temperature and the second heating preset deviation, reducing and stopping the group of heat pump systems; if the inlet water temperature is greater than the difference between the set inlet water temperature and the first heating preset deviation and less than the sum of the set inlet water temperature and the second heating preset deviation, further detecting the change value of the inlet water temperature within a second set time length, comparing the change value of the inlet water temperature with the first heating preset change value and the second heating preset change value, if the change value of the inlet water temperature is less than or equal to the first heating preset change value, increasing a group of heat pump systems, if the change value of the inlet water temperature is greater than the second heating preset change value, reducing and stopping the group of heat pump systems, and if the inlet water temperature is greater than the first heating preset change value and less than or equal to the second heating preset change value, keeping the number of the currently-started heat pump systems unchanged.
It should be noted that, the execution order of step S210 and step S220 may be changed, and the execution order of step S232 and step S233 may also be changed.
Through the arrangement, in the heating mode, when the difference value between the inlet water temperature and the set inlet water temperature is relatively large, the group of heat pump systems is started or stopped in a reducing mode, when the difference value between the inlet water temperature and the set inlet water temperature is relatively small, the change value of the inlet water temperature in the second set time period is further compared with the first heating preset change value and the second heating preset change value, the number of the started heat pump systems is selectively adjusted according to the comparison result, the number of the started heat pump systems can be more finely adjusted, and the adjustment of the target space temperature is more stable and reliable.
Preferably, the first heating preset deviation is greater than the second heating preset deviation. Through the arrangement, the conditions for increasing the heat pump system are more strict than the conditions for reducing the heat pump system, and the quantity of the heat pump systems which are started is reduced as much as possible on the basis of meeting the temperature setting requirements of users as much as possible in the running process of the unit, so that the energy consumption is reduced, and the heat pump system is more energy-saving and environment-friendly.
In another possible implementation, unlike the second embodiment, in the absence of the steps S231, S232 and S233 in the first embodiment, when the step S220 is executed, if the temperature of the inlet water is not greater than the second preset heating temperature, the step S330 is executed, that is, the number of heat pump systems currently turned on is kept unchanged when the temperature of the inlet water is greater than the first preset heating temperature and less than the second preset heating temperature.
In another embodiment, the air conditioning unit comprises a cooling mode and a heating mode, and the control method of the air conditioning unit comprises the steps of determining the operation mode of the air conditioning unit, executing the control method of the cooling mode in the cooling mode, and executing the control method of the heating mode in the heating mode.
In another preferred embodiment, the set inlet water temperature and the preset deviation input by the user through the control panel of the air conditioning unit in each of the above embodiments may be replaced by automatically determining the set inlet water temperature and the preset deviation of different time nodes of the air conditioning unit by the controller according to the pre-stored mapping relationship between the set inlet water temperature and the preset deviation and the time point, so as to realize more intelligent adjustment of the operation of the air conditioning unit. The control method is more suitable for temperature regulation and control of the culture place, and the temperature regulation is more scientific and accurate.
In another aspect, the present invention further provides an air conditioning unit, including: the control method of the air conditioning unit comprises a memory, a processor and a computer program, wherein the computer program is stored in the memory and is configured to be executed by the processor to realize the control method of the air conditioning unit of any one of the embodiments. When it is required to be described, the air conditioning unit may be an air source air conditioning unit, a water source air conditioning unit, or other suitable air conditioning units.
It should be noted that the memory in the above embodiments includes, but is not limited to, a random access memory, a flash memory, a read only memory, a programmable read only memory, a volatile memory, a non-volatile memory, a serial memory, a parallel memory, or a register, and the like, and the processor includes, but is not limited to, a CPLD/FPGA, a DSP, an ARM processor, a MIPS processor, and the like.
As can be seen from the above description, in the technical solution of the present invention, the number of the heat pump systems to be started is selectively adjusted by comparing the incoming water temperature with the first preset temperature and the second preset temperature determined according to the deviation between the set incoming water temperature and the preset temperature, and the number of the heat pump systems to be started is adjusted when the incoming water temperature exceeds the temperature range related to the set temperature, so that the situation that the heat pump systems are frequently started and stopped due to selectively increasing or decreasing the heat pump systems according to the incoming water temperature and the set incoming water temperature is avoided, the frequency of starting and stopping the heat pump systems is reduced, the temperature fluctuation of the target space in the operation process of the air conditioning unit is reduced, and the comfort level of the target space is improved. The preset deviation used for determining the first preset temperature and the second preset temperature can be adjusted in the use stage, so that the first preset temperature and the second preset temperature can be adjusted according to the actual application place and the requirements of different use stages, and the requirements of different places and use stages are met on the basis of reducing the temperature fluctuation of the target space.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims of the present invention, any of the claimed embodiments may be used in any combination.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method of an air conditioning unit, the air conditioning unit including a plurality of sets of heat pump systems and a water circulation circuit for transferring heat between heat exchangers of the heat pump systems and a target space, the control method comprising:
detecting the inlet water temperature of the inlet water ends of the multiple groups of heat pump systems in the water circulation loop;
comparing the water inlet temperature with a first preset temperature and a second preset temperature;
selectively adjusting the number of the heat pump systems to be started according to the comparison result;
wherein the first preset temperature and the second preset temperature are determined according to a set inlet water temperature and a preset deviation, and the preset deviation can be adjusted in a use stage.
2. The control method of claim 1, wherein, in the cooling mode, the preset deviation comprises a first cooling preset deviation and a second cooling preset deviation, the first preset temperature comprises a first cooling preset temperature, the first cooling preset temperature is the set water inlet temperature plus the first cooling preset deviation, the second preset temperature comprises a second cooling preset temperature, the second cooling preset temperature is the set water inlet temperature minus the second cooling preset deviation,
the step of selectively adjusting the number of the heat pump systems to be turned on according to the comparison result includes:
if the inlet water temperature is greater than or equal to the first refrigeration preset temperature, a group of heat pump systems is added;
and if the inlet water temperature is less than or equal to the second refrigeration preset temperature, reducing and stopping one group of heat pump systems.
3. The control method according to claim 2, wherein the step of selectively adjusting the number of the heat pump systems that are turned on according to the comparison result further comprises:
if the inlet water temperature is higher than the second preset refrigeration temperature and lower than the first preset refrigeration temperature, detecting the change value of the inlet water temperature within a first preset time period;
comparing the change value of the inlet water temperature with a first refrigeration preset change value and a second refrigeration preset change value;
and selectively adjusting the quantity of the heat pump systems to be started according to the comparison result of the change value of the inlet water temperature and the first refrigeration preset change value and the second refrigeration preset change value.
4. The control method according to claim 3, wherein the step of selectively adjusting the number of the heat pump systems to be turned on according to the comparison result between the variation value of the temperature of the intake water and the first refrigeration preset variation value and the second refrigeration preset variation value comprises:
if the variation value of the inlet water temperature is smaller than or equal to the first refrigeration preset variation value, a group of heat pump systems is added;
if the variation value of the inlet water temperature is larger than the second preset refrigeration variation value, reducing and stopping one group of heat pump systems;
and if the variation value of the inlet water temperature is greater than the first preset variation value of refrigeration and less than or equal to the second preset variation value of refrigeration, keeping the number of the heat pump units which are started at present unchanged.
5. The control method according to any one of claims 2 to 4, characterized in that the first refrigeration preset deviation is greater than the second refrigeration preset deviation.
6. The control method according to claim 1, wherein in the heating mode, the preset deviation includes a first heating preset deviation and a second heating preset deviation, the first preset temperature includes a first heating preset temperature, the first heating preset temperature is the set water inlet temperature minus the first heating preset deviation, the second preset temperature includes a second heating preset temperature, the second heating preset temperature is the set water inlet temperature plus the second heating preset deviation,
the step of selectively adjusting the number of the heat pump systems to be turned on according to the comparison result includes:
if the water inlet temperature is less than or equal to the first heating preset temperature, a group of heat pump systems is added;
and if the water inlet temperature is greater than or equal to the second heating preset temperature, reducing and stopping one group of heat pump systems.
7. The control method according to claim 6, wherein the step of selectively adjusting the number of the heat pump systems that are turned on according to the comparison result further comprises:
if the inlet water temperature is higher than the first heating preset temperature and lower than the second heating preset temperature, detecting a change value of the inlet water temperature within a second preset time;
comparing the change value of the inlet water temperature with a first heating preset change value and a second heating preset change value;
and selectively adjusting the quantity of the heat pump systems to be started according to the comparison result of the change value of the inlet water temperature and the first heating preset change value and the second heating preset change value.
8. The control method according to claim 7, wherein the step of selectively adjusting the number of the heat pump systems to be turned on according to the comparison result between the variation value of the temperature of the intake water and the first heating preset variation value and the second heating preset variation value comprises:
if the variation value of the inlet water temperature is smaller than or equal to the first heating preset variation value, a group of heat pump systems is added;
if the variation value of the inlet water temperature is larger than the second heating preset variation value, reducing and stopping one group of heat pump systems;
and if the variation value of the inlet water temperature is greater than the first heating preset variation value and less than or equal to the second heating preset variation value, keeping the number of the heat pump units which are started currently unchanged.
9. The control method according to any one of claims 6 to 8, characterized in that the first heating preset deviation is larger than the second heating preset deviation.
10. An air conditioning assembly, comprising:
a memory;
a processor; and
a computer program stored in the memory and configured to be executed by the processor to implement the control method of the air conditioning group according to any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950062A (en) * | 2023-01-17 | 2023-04-11 | 青岛海尔空调电子有限公司 | Air conditioning system and control method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769583A (en) * | 2009-12-30 | 2010-07-07 | 广东美的电器股份有限公司 | Air conditioner control method with compressor control temperature difference compensation function |
| CN106196783A (en) * | 2016-06-28 | 2016-12-07 | 青岛海尔空调电子有限公司 | The control method of a kind of module unit, control device and module unit |
| CN106524582A (en) * | 2016-11-24 | 2017-03-22 | 广东美的暖通设备有限公司 | Compressor load control method and device applicable to water side parallel-connected air cooled heat pump units |
| CN106969473A (en) * | 2017-04-26 | 2017-07-21 | 青岛海尔空调电子有限公司 | A kind of air-conditioner set control method |
| CN107763887A (en) * | 2017-11-03 | 2018-03-06 | 广东芬尼能源技术有限公司 | The control of Energy Level method and control device of a kind of dual system source pump |
| CN110068107A (en) * | 2019-04-08 | 2019-07-30 | 广东纽恩泰新能源科技发展有限公司 | A kind of modularity control method |
| CN111102691A (en) * | 2019-12-17 | 2020-05-05 | 青岛海信日立空调系统有限公司 | Module combined air conditioning system |
| CN111426059A (en) * | 2020-04-29 | 2020-07-17 | 广东芬尼能源技术有限公司 | Control method and device of multi-unit parallel heat pump system |
| CN112303807A (en) * | 2020-10-27 | 2021-02-02 | 广东Tcl智能暖通设备有限公司 | Compressor loading control method, multi-split system and storage medium |
| CN112361607A (en) * | 2020-10-26 | 2021-02-12 | 珠海格力电器股份有限公司 | Water heater system control method and device and water heater system |
| WO2021036842A1 (en) * | 2019-08-30 | 2021-03-04 | 青岛海尔空调电子有限公司 | Control method for multi-split air conditioning system capable of simultaneous cooling and heating |
-
2021
- 2021-05-31 CN CN202110602537.5A patent/CN113237197A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769583A (en) * | 2009-12-30 | 2010-07-07 | 广东美的电器股份有限公司 | Air conditioner control method with compressor control temperature difference compensation function |
| CN106196783A (en) * | 2016-06-28 | 2016-12-07 | 青岛海尔空调电子有限公司 | The control method of a kind of module unit, control device and module unit |
| CN106524582A (en) * | 2016-11-24 | 2017-03-22 | 广东美的暖通设备有限公司 | Compressor load control method and device applicable to water side parallel-connected air cooled heat pump units |
| CN106969473A (en) * | 2017-04-26 | 2017-07-21 | 青岛海尔空调电子有限公司 | A kind of air-conditioner set control method |
| CN107763887A (en) * | 2017-11-03 | 2018-03-06 | 广东芬尼能源技术有限公司 | The control of Energy Level method and control device of a kind of dual system source pump |
| CN110068107A (en) * | 2019-04-08 | 2019-07-30 | 广东纽恩泰新能源科技发展有限公司 | A kind of modularity control method |
| WO2021036842A1 (en) * | 2019-08-30 | 2021-03-04 | 青岛海尔空调电子有限公司 | Control method for multi-split air conditioning system capable of simultaneous cooling and heating |
| CN111102691A (en) * | 2019-12-17 | 2020-05-05 | 青岛海信日立空调系统有限公司 | Module combined air conditioning system |
| CN111426059A (en) * | 2020-04-29 | 2020-07-17 | 广东芬尼能源技术有限公司 | Control method and device of multi-unit parallel heat pump system |
| CN112361607A (en) * | 2020-10-26 | 2021-02-12 | 珠海格力电器股份有限公司 | Water heater system control method and device and water heater system |
| CN112303807A (en) * | 2020-10-27 | 2021-02-02 | 广东Tcl智能暖通设备有限公司 | Compressor loading control method, multi-split system and storage medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950062A (en) * | 2023-01-17 | 2023-04-11 | 青岛海尔空调电子有限公司 | Air conditioning system and control method thereof |
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