CN110425687B - Refrigerant adjusting method, refrigerant adjusting controller and air conditioning system - Google Patents
Refrigerant adjusting method, refrigerant adjusting controller and air conditioning system Download PDFInfo
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- CN110425687B CN110425687B CN201910734882.7A CN201910734882A CN110425687B CN 110425687 B CN110425687 B CN 110425687B CN 201910734882 A CN201910734882 A CN 201910734882A CN 110425687 B CN110425687 B CN 110425687B
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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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
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention provides a refrigerant adjusting method, a refrigerant adjusting controller and an air conditioning system, wherein the refrigerant adjusting method comprises the following steps: setting at least two control sections for each operation mode; distributing corresponding superheat degree and limited operation interval for each control section; calculating the temperature difference between the current environment temperature and the set temperature; determining a limited operation interval to which the temperature difference belongs; selecting a target control section according to a limited operation interval to which the temperature difference belongs; and judging whether the superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with the superheat degree corresponding to the target control section, and if not, adjusting the set superheat degree to the superheat degree corresponding to the target control section. The scheme provided by the invention realizes the adjustment of the refrigerant quantity conveyed by the indoor unit of the air conditioning system according to the environmental temperature difference.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant adjusting method, a refrigerant adjusting controller and an air conditioning system.
Background
The air conditioning system is a common system for refrigerating and heating, and the quantity of refrigerants required by the air conditioning system is different when the air conditioning system operates under different working condition loads. At present, the refrigerant quantity of many household single-unit or multi-unit variable frequency air conditioners is mainly controlled by controlling the opening degree of an expansion valve or an electronic valve according to the operation parameters of an air conditioning system, so that the refrigerant quantity of the air conditioning system is adjusted. Because there is sometimes certain difference between air conditioning system operating parameter and ambient temperature, adjusting the refrigerant volume through air conditioning system operating parameter only often leads to ambient temperature overshoot.
Disclosure of Invention
The embodiment of the invention provides a refrigerant adjusting method, a refrigerant adjusting controller and an air conditioning system, which realize the adjustment of the amount of refrigerant conveyed by an indoor unit of the air conditioning system according to the environmental temperature difference.
In a first aspect, an embodiment of the present invention provides a refrigerant adjusting method, including:
setting at least two control sections for each operation mode;
distributing corresponding superheat degree and a limited operation interval for each control section;
further comprising:
calculating the temperature difference between the current environment temperature and the set temperature;
determining a limited operation interval to which the temperature difference belongs;
selecting a target control section according to the limited operation interval to which the temperature difference belongs;
and judging whether the superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with the superheat degree corresponding to the target control section, and if not, adjusting the set superheat degree to the superheat degree corresponding to the target control section.
Preferably, the setting of at least two control sections for each operation mode, and the allocating of the corresponding superheat degree to each control section comprise:
seven control sections are set for each operation mode;
determining the degree of superheat corresponding to any one of the control sections;
and distributing corresponding superheat degrees to other control sections according to the difference of the superheat degrees corresponding to every two adjacent control sections by 1 degree.
Preferably, the allocating a corresponding limited operation interval to each control segment includes:
allocating a defined operating interval of (90, 100) to a first control segment of the seven control segments;
allocating a defined operating interval of (70, 90) to a second control segment of the seven control segments;
assigning a defined operating interval of (40, 70) to a third control segment of the seven control segments;
allocating a limited operation interval of (20, 40) to a fourth control section of the seven control sections;
allocating a limited operation interval of (10, 20) to a fifth control section of the seven control sections;
allocating a limited operation interval of (5, 10) to a sixth control section in the seven control sections;
allocating a limited operation interval of [0, 5] to a seventh control section in the seven control sections;
wherein the value in the limited operation interval represents the demand degree of the indoor unit.
Preferably, the determining of the limited operation interval to which the temperature difference belongs includes:
in connection with the cooling mode, it is,
determining a corresponding demand degree for the temperature difference by using a demand degree calculation formula;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
Preferably, the determining of the limited operation interval to which the temperature difference belongs includes:
with respect to the heating mode,
determining a corresponding demand degree for the temperature difference by using a demand degree calculation formula;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
Preferably, the first and second electrodes are formed of a metal,
the value range of the superheat degree is an integer within [0, 6 ].
In a second aspect, an embodiment of the present invention provides a refrigerant conditioning controller, including: a setting and distribution unit, a control section selection unit and a superheat degree adjustment unit, wherein,
the setting and distributing unit is used for setting at least two control sections for each operation mode; distributing corresponding superheat degree and a limited operation interval for each control section;
the control section selection unit is used for calculating the temperature difference between the current environment temperature and the set temperature; distributing corresponding superheat degree and limited operation interval for each control section according to the setting and distributing unit, and determining the limited operation interval to which the temperature difference belongs; selecting a target control section according to the limited operation interval to which the temperature difference belongs;
and the superheat degree adjusting unit is used for judging whether the superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with the superheat degree corresponding to the target control section selected by the control section selecting unit, and if not, adjusting the set superheat degree to the superheat degree corresponding to the target control section.
Preferably, the setting and allocating unit is configured to:
seven control sections are set for each operation mode; determining the degree of superheat corresponding to any one of the control sections; distributing corresponding superheat degrees to other control sections according to the difference of the superheat degrees corresponding to every two adjacent control sections by 1 degree; the method comprises the steps of allocating a limited operation interval to a first control section of the seven control sections to be (90, 100), allocating a limited operation interval to a second control section of the seven control sections to be (70, 90), allocating a limited operation interval to a third control section of the seven control sections to be (40, 70), allocating a limited operation interval to a fourth control section of the seven control sections to be (20, 40), allocating a limited operation interval to a fifth control section of the seven control sections to be (10, 20), allocating a limited operation interval to a sixth control section of the seven control sections to be (5, 10), allocating a limited operation interval to a seventh control section of the seven control sections to be [0, 5], wherein values in the limited operation intervals represent the demand degree of an indoor unit.
Preferably, the first and second electrodes are formed of a metal,
the control section selection unit is used for determining corresponding demand for the temperature difference by utilizing the following demand calculation formula aiming at the refrigeration mode;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
Preferably, the first and second electrodes are formed of a metal,
the control section selection unit is used for determining corresponding demand for the temperature difference by using the following demand calculation formula aiming at the heating mode;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
In a third aspect, an embodiment of the present invention provides an air conditioning system, including: any one of the refrigerant conditioning controller, the outdoor unit, and at least one indoor unit connected to the outdoor unit, wherein,
the refrigerant adjusting controller is connected to the outdoor unit and used for adjusting and controlling the amount of refrigerant conveyed by the outdoor unit to each indoor unit.
The embodiment of the invention provides a refrigerant adjusting method, a refrigerant adjusting controller and an air conditioning system, wherein the refrigerant adjusting method is characterized in that at least two control sections are arranged for each operation mode; distributing corresponding superheat degree and limited operation interval for each control section; calculating the temperature difference between the current environment temperature and the set temperature; determining a limited operation interval to which the temperature difference belongs; selecting a target control section according to a limited operation interval to which the temperature difference belongs; and judging whether the superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with the superheat degree corresponding to the target control section, and if not, adjusting the set superheat degree to the superheat degree corresponding to the target control section. The refrigerant quantity conveyed by the indoor unit of the air conditioning system is adjusted according to the environmental temperature difference.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a refrigerant adjusting method according to an embodiment of the present invention;
fig. 2 is a flowchart of another refrigerant adjusting method according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a refrigerant conditioning controller according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an air conditioning system according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a refrigerant adjusting method, which includes:
step 101: setting at least two control sections for each operation mode;
step 102: distributing corresponding superheat degree and limited operation interval for each control section;
step 103: calculating the temperature difference between the current environment temperature and the set temperature;
step 104: determining a limited operation interval to which the temperature difference belongs;
step 105: selecting a target control section according to a limited operation interval to which the temperature difference belongs;
step 106: judging whether the degree of superheat set for the electronic expansion valve of the indoor unit at present is consistent with the degree of superheat corresponding to the target control section, if so, executing step 107; otherwise, go to step 108;
step 107: keeping the current superheat degree and finishing the current flow;
step 108: and adjusting the set superheat degree to the superheat degree corresponding to the target control section.
It can be understood that, during the operation of the air conditioning system, the above steps 101 to 108 are continuously and circularly operated to ensure that the superheat degree of the electronic expansion valve of the indoor unit can be adjusted according to the temperature difference between the ambient temperature and the set temperature at any moment.
The value in the limited operation interval is the demand degree of the indoor unit to the refrigerant.
The control section and the superheat degree distributed for the control section are reasonable results obtained through research and repeated tests, operation is simplified, and meanwhile accurate regulation and control of the refrigerant quantity are achieved.
In the embodiment shown in FIG. 1, the method is implemented by providing at least two control sections for each mode of operation; distributing corresponding superheat degree and limited operation interval for each control section; calculating the temperature difference between the current environment temperature and the set temperature; determining a limited operation interval to which the temperature difference belongs; selecting a target control section according to a limited operation interval to which the temperature difference belongs; and judging whether the superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with the superheat degree corresponding to the target control section, and if not, adjusting the set superheat degree to the superheat degree corresponding to the target control section. The refrigerant quantity conveyed by the indoor unit of the air conditioning system is adjusted according to the environmental temperature difference.
In another embodiment of the present invention, in order to accurately allocate the corresponding superheat degree to the control section and enable the superheat degree to better regulate and control the amount of refrigerant to accurately control the ambient temperature, repeated research and experiments by the inventors of the present invention finally determine that the specific real-time manner of the step 101 and the step 102 may be that seven control sections are set for each operation mode; determining the degree of superheat corresponding to any one control section; and distributing corresponding superheat degrees for other control sections according to the difference of the superheat degrees corresponding to every two adjacent control sections by 1 degree. For example, the control sections are K1, K2, K3, K4, K5, K6 and K7, wherein the superheat degrees corresponding to K1 to K7 are sequentially increased, after the superheat degree corresponding to K6 is determined to be a1, the superheat degree corresponding to K7 is a1+1, the superheat degree corresponding to K5 is a1-1, the superheat degree corresponding to K4 is a1-2, the superheat degree corresponding to K3 is a1-3, the superheat degree corresponding to K2 is a1-4, and the superheat degree corresponding to K1 is a 1-5.
The final base of the superheat degree is determined according to the limited operation interval corresponding to each control section, and the correlation between the superheat degree and the limited operation interval is established through the intermediate value of the control section, so that the establishment of the corresponding relation is simple and convenient.
In another embodiment of the present invention, the allocating the corresponding limited operation interval to each of the control segments may include: the method comprises the steps of allocating a defined operation interval to a first control section of seven control sections as (90, 100), allocating a defined operation interval to a second control section of the seven control sections as (70, 90), allocating a defined operation interval to a third control section of the seven control sections as (40, 70), allocating a defined operation interval to a fourth control section of the seven control sections as (20, 40), allocating a defined operation interval to a fifth control section of the seven control sections as (10, 20), allocating a defined operation interval to a sixth control section of the seven control sections as (5, 10), allocating a defined operation interval to a seventh control section of the seven control sections as [0, 5], wherein values in the defined operation intervals characterize the demand of the indoor unit.
The specific implementation of step 104 may be divided into two parts, one part is for the cooling mode, and the other part is for the heating mode.
In connection with the cooling mode, it is,
determining corresponding demand for the temperature difference by using the following demand calculation formula;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
With respect to the heating mode,
determining corresponding demand for the temperature difference by using the following demand calculation formula;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
The range of the superheat degree is an integer within [0, 6 ]. It is worth to be noted that, when the capacity demand of a certain indoor unit is larger and the demand degree is also larger, the value of the superheat degree is smaller, and the corresponding expansion valve of the indoor unit is larger in comparison, that is, more refrigerants are distributed to the indoor unit, so that the set effect can be gradually achieved; when the capacity requirement of a certain indoor unit is smaller, the requirement degree DL is also smaller, the superheat degree is larger, the corresponding indoor unit expansion valve is smaller in comparison, that is, less refrigerant is distributed to the indoor unit, and the set effect can be achieved.
In order to clearly illustrate the refrigerant adjusting method, an example in which one outdoor unit is connected to four indoor units, and the four indoor units adjust and control the refrigerant amount is used as an example for explanation. In the embodiment, the outdoor unit is abbreviated as ODU as a master, and the indoor units are abbreviated as IDU1, IDU2, IDU3, and IDU4 as slaves, respectively. The information of parameters, states or controls and the like of the IDU1, IDU2, IDU3 and IDU4 of each indoor unit is transmitted to the outdoor unit ODU, a refrigerant adjusting controller in the outdoor unit controls the communication with each indoor unit, calculates the demand degree of each indoor unit, determines a control section according to the demand degree, determines a target superheat degree according to the control section, and judges whether the expansion valve is adjusted according to the actual superheat degree, the current opening degree of the expansion valve, the target step number and the like so as to adjust the amount of the refrigerant input into the indoor unit. As shown in fig. 2, the method for adjusting refrigerant may include:
step 201: setting seven control sections and respectively determining the superheat degree and the limited operation interval corresponding to the seven control sections;
the specific process of determining the degrees of superheat corresponding to the seven control sections can be to determine the degree of superheat corresponding to any one control section; and distributing corresponding superheat degrees for other control sections according to the difference of the superheat degrees corresponding to every two adjacent control sections by 1 degree. For example, if the first control section determines that the degree of superheat is 0, the second control section determines that the degree of superheat is 1, the third control section determines that the degree of superheat is 2, the fourth control section determines that the degree of superheat is 3, the fifth control section determines that the degree of superheat is 4, the sixth control section determines that the degree of superheat is 5, and the seventh control section determines that the degree of superheat is 6. The first control section is distributed with a limited operation interval of (90, 100), the second control section is distributed with a limited operation interval of (70, 90), the third control section is distributed with a limited operation interval of (40, 70), the fourth control section is distributed with a limited operation interval of (20, 40), the fifth control section is distributed with a limited operation interval of (10, 20), the sixth control section is distributed with a limited operation interval of (5, 10), the seventh control section is distributed with a limited operation interval of [0, 5], the limited operation interval (90, 100) corresponds to the superheat degree of 0, the limited operation interval (70, 90) corresponds to the superheat degree of 1, the limited operation interval (40, 70) corresponds to the superheat degree of 2, the limited operation interval of (20, 40) corresponds to the superheat degree of 3, the limited operation interval of (10, 20) corresponds to the superheat degree of 4, the limited operation interval of (5, 10] corresponds to the superheat degree of 5, 0, 5] corresponds to a superheat degree of 6.
Step 202: calculating the temperature difference between the current environment temperature and the set temperature;
the ambient temperature can be directly detected by a sensor on the indoor unit.
Step 203: determining a limited operation interval to which the temperature difference belongs;
for example, IDU1 and IDU3 operate in cooling mode, IDU2 operates in blowing mode, and IDU4 is off. The IDU2 will require zero as in IDU4 due to the blower mode of operation, and its expansion valve will always be off and not regulated. That is, in the blowing mode or shutdown state, the demand degree is zero, the expansion valve is always closed, and no adjustment is performed. And the expansion valve is adjusted in a cooling mode and a heating mode to adjust the refrigerant quantity.
The specific implementation manner of the step is as follows:
in connection with the cooling mode, it is,
determining a corresponding demand degree for the temperature difference by using a demand degree calculation formula;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
with respect to the heating mode,
determining a corresponding demand degree for the temperature difference by using a demand degree calculation formula;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
In the cooling mode, when Δ T ≦ -1, DL ≦ 0. For the heating mode, when Δ T ≧ 1, DL ═ 0.
Step 204: selecting a target control section according to a limited operation interval to which the temperature difference belongs;
step 205: judging whether the degree of superheat set for the electronic expansion valve of the indoor unit at present is consistent with the degree of superheat corresponding to the target control section, if so, executing step 206; otherwise, go to step 207;
step 206: keeping the current superheat degree and finishing the current flow;
step 207: and adjusting the set superheat degree to the superheat degree corresponding to the target control section.
Such as: the set temperature (Ts) of the IDU1 running in the refrigeration mode is 26 ℃, when the refrigerator is started, the indoor environment temperature (Tr) of the room is 30 ℃, the demand value is 100 according to the refrigeration mode calculation formula, and the corresponding superheat degree is 0 corresponding to the first control section; at the moment, the capacity requirement of the IDU1 is large, the actual superheat degree of the expansion valve of the IDU1 approaches to the superheat degree corresponding to the first control section, because the superheat degree corresponding to the first control section is small, the machine runs for a long time, the actual superheat degree can approach and fluctuates in a small range near the superheat degree (0) corresponding to the first control section, the opening degree of the expansion valve of the IDU1 is large, and the flow rate of a refrigerant flowing to the indoor unit is also large;
after the operation is carried out for a period of time, if Tr is reduced to 29 ℃, the demand value is changed to 90, and the corresponding superheat degree of the second control section is changed from 0 to 1; because the superheat degree corresponding to the second control section is increased, the actual superheat degree of the expansion valve of the IDU1 is smaller than the superheat degree corresponding to the second control section and approaches the superheat degree corresponding to the second control section, so that the opening degree of the expansion valve is gradually reduced, the flow rate of the refrigerant flowing to the IDU1 is also reduced, the reduction speed of Tr is also reduced, and further the DL is gradually reduced, that is, the capacity requirement of the IDU1 is smaller and smaller;
after the operation is carried out for a period of time, if Tr is reduced to 26.8 ℃, the demand degree is changed to 34, and the corresponding superheat degree is changed to 3 corresponding to the fourth control section; because the superheat degree corresponding to the fourth control section is increased, at this time, the actual superheat degree of the expansion valve of the IDU1 is smaller than the superheat degree corresponding to the fourth control section, and the superheat degree corresponding to the fourth control section approaches, so that the opening degree of the expansion valve is gradually reduced, the flow rate of the refrigerant flowing to the IDU1 is also reduced, the reduction speed of Tr is also reduced, further, DL is also gradually reduced, and the capacity requirement of the IDU1 is smaller and smaller;
after the operation is carried out for a period of time, if Tr is reduced to 26.6 ℃, the DL value is changed to 28, and the corresponding superheat degree is still 3 corresponding to the fourth control section; keeping the fourth control section unchanged;
after the operation is carried out for a period of time, if Tr is reduced to 26.5 ℃, the DL value is changed to 25, and the corresponding superheat degree of the fifth control section is still 3; keeping the fourth control section unchanged;
after a period of operation, if Tr is reduced to 25.5 ℃, the DL value is changed to 5, and the corresponding superheat degree is correspondingly changed to 6 corresponding to the seventh control section; because the superheat degree corresponding to the seventh control section is increased, the actual superheat degree of the expansion valve of the IDU1 is smaller than the superheat degree corresponding to the seventh control section at this time, and the superheat degree corresponding to the seventh control section approaches, so that the opening degree of the expansion valve is gradually reduced, the flow rate of the refrigerant flowing to the IDU1 is also reduced, and the Tr is very slowly reduced;
however, when the actual superheat degree exceeds the target superheat degree, the opening degree of the expansion valve of the IDU1 is gradually increased, the flow rate of the refrigerant flowing to the IDU1 is also increased, at this time, Tr may be increased very slowly, when the expansion valve of the IDU1 is increased to a certain opening degree, the actual superheat degree is lower than the target superheat degree and approaches to the target superheat degree, the opening degree of the expansion valve is gradually reduced, the flow rate of the refrigerant flowing to the IDU1 is also reduced, and Tr is slowly reduced;
in such a reciprocating manner, Tr of the IDU1 fluctuates in a small range around 26 ℃, and the capacity requirement of the IDU1 on the outdoor unit is low; if Tr of IDU3 also falls near the set point temperature at this time, the compressor only needs a low capacity to maintain the present state, but does not cause system shutdown.
It should be noted that the refrigerant adjusting method provided by the present invention is also applicable to an inverter air conditioner in which an outdoor unit is connected to a single indoor unit.
As shown in fig. 3, an embodiment of the present invention provides a refrigerant conditioning controller, including: a and distribution unit 301, a control section selection unit 302, and a superheat adjustment unit 303 are provided, wherein,
a setting and allocating unit 301 for setting at least two control sections for each operation mode; distributing corresponding superheat degree and limited operation interval for each control section;
a control section selection unit 302 for calculating a temperature difference between a current ambient temperature and a set temperature; determining a limited operation interval to which the temperature difference belongs according to the superheat degree and the limited operation interval which are set and distributed to each control section by the distribution unit 301; selecting a target control section according to a limited operation interval to which the temperature difference belongs;
and a superheat degree adjusting unit 303, configured to determine whether a superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with a superheat degree corresponding to the target control section selected by the control section selecting unit 302, and if not, adjust the set superheat degree to the superheat degree corresponding to the target control section.
In another embodiment of the present invention, the setting and allocating unit 301 is configured to set seven control segments for each operation mode; determining the degree of superheat corresponding to any one of the control sections; distributing corresponding superheat degrees to other control sections according to the difference of the superheat degrees of every two adjacent control sections by 1 degree; the method comprises the steps of allocating a defined operation interval to a first control section of seven control sections as (90, 100), allocating a defined operation interval to a second control section of the seven control sections as (70, 90), allocating a defined operation interval to a third control section of the seven control sections as (40, 70), allocating a defined operation interval to a fourth control section of the seven control sections as (20, 40), allocating a defined operation interval to a fifth control section of the seven control sections as (10, 20), allocating a defined operation interval to a sixth control section of the seven control sections as (5, 10), allocating a defined operation interval to a seventh control section of the seven control sections as [0, 5], wherein values in the defined operation intervals characterize the demand of the indoor unit.
In another embodiment of the present invention, the control section selecting unit 302 is configured to determine a corresponding demand degree for the temperature difference according to the following demand degree calculation formula for the cooling mode;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
In another embodiment of the present invention, the control section selecting unit 302 is configured to determine a corresponding demand degree for the temperature difference according to the following demand degree calculation formula for the heating mode;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
The range of the superheat degree is an integer within [0, 6 ].
The information interaction, execution process and other contents between the units in the device are based on the same concept as the system embodiment of the present invention, and specific contents can be referred to the description in the system embodiment of the present invention, and are not described herein again.
As shown in fig. 4, an embodiment of the present invention provides an air conditioning system, including: any one of the refrigerant conditioning controller 401, the outdoor unit 402, and at least one indoor unit 403 connected to the outdoor unit 402, wherein,
the refrigerant adjusting controller 401 is connected to the outdoor unit 402, and is configured to adjust and control the amount of refrigerant delivered by the outdoor unit 402 for each indoor unit 403.
The embodiment of the invention provides a readable medium which comprises an execution instruction, and when a processor of a storage controller executes the execution instruction, the storage controller executes the identification method of any energy device provided by the embodiment of the invention.
The embodiment of the invention provides a refrigerant adjusting controller, which comprises: a processor, a memory, and a bus;
the processor is connected with the memory through the bus, and when the refrigerant regulation controller runs, the processor executes the execution instruction stored in the memory, so that the refrigerant regulation controller executes any refrigerant regulation method provided by the embodiment of the invention.
The embodiments of the invention have at least the following beneficial effects:
1. in the embodiment of the invention, at least two control sections are set for each operation mode; distributing corresponding superheat degree and limited operation interval for each control section; calculating the temperature difference between the current environment temperature and the set temperature; determining a limited operation interval to which the temperature difference belongs; selecting a target control section according to a limited operation interval to which the temperature difference belongs; and judging whether the superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with the superheat degree corresponding to the target control section, and if not, adjusting the set superheat degree to the superheat degree corresponding to the target control section. The refrigerant quantity conveyed by the indoor unit of the air conditioning system is adjusted according to the environmental temperature difference.
2. In the embodiment of the invention, seven control sections are set for each operation mode; determining the degree of superheat corresponding to any one control section; and distributing corresponding superheat degrees for other control sections according to the difference of the superheat degrees corresponding to every two adjacent control sections by 1 degree. The corresponding superheat degree can be accurately distributed to the control section, so that the superheat degree can well regulate and control the refrigerant quantity to accurately control the ambient temperature.
3. In the embodiment of the invention, the root of the degree of superheat is determined according to the limited operation interval corresponding to each control section, and the correlation between the degree of superheat and the limited operation interval is established through the intermediate value of the control section, so that the establishment of the corresponding relation is simpler and more convenient.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A refrigerant conditioning method, comprising:
setting at least two control sections for each operation mode;
distributing corresponding superheat degree and a limited operation interval for each control section;
further comprising:
calculating the temperature difference between the current environment temperature and the set temperature;
determining a limited operation interval to which the temperature difference belongs;
selecting a target control section according to the limited operation interval to which the temperature difference belongs;
and judging whether the superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with the superheat degree corresponding to the target control section, and if not, adjusting the set superheat degree to the superheat degree corresponding to the target control section.
2. The refrigerant conditioning method as claimed in claim 1, wherein the setting of at least two control sections for each operation mode, and the assigning of a corresponding degree of superheat to each control section, comprises:
seven control sections are set for each operation mode;
determining the degree of superheat corresponding to any one of the control sections;
and distributing corresponding superheat degrees to other control sections according to the difference of the superheat degrees corresponding to every two adjacent control sections by 1 degree.
3. The refrigerant conditioning method according to claim 2, wherein the allocating a corresponding limited operation interval to each of the control sections includes:
allocating a defined operating interval of (90, 100) to a first control segment of the seven control segments;
allocating a defined operating interval of (70, 90) to a second control segment of the seven control segments;
assigning a defined operating interval of (40, 70) to a third control segment of the seven control segments;
allocating a limited operation interval of (20, 40) to a fourth control section of the seven control sections;
allocating a limited operation interval of (10, 20) to a fifth control section of the seven control sections;
allocating a limited operation interval of (5, 10) to a sixth control section in the seven control sections;
allocating a limited operation interval of [0, 5] to a seventh control section in the seven control sections;
wherein the value in the limited operation interval represents the demand degree of the indoor unit.
4. The refrigerant conditioning method according to claim 3, wherein the determining the limited operation interval to which the temperature difference belongs comprises:
in connection with the cooling mode, it is,
determining a corresponding demand degree for the temperature difference by using a demand degree calculation formula;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
5. The refrigerant conditioning method according to claim 3, wherein the determining the limited operation interval to which the temperature difference belongs comprises:
with respect to the heating mode,
determining a corresponding demand degree for the temperature difference by using a demand degree calculation formula;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
6. The refrigerant conditioning method according to any one of claims 1 to 5,
and the value range of the set superheat degree and the superheat degree corresponding to the target control section is an integer within [0, 6 ].
7. A refrigerant conditioning controller, comprising: a setting and distribution unit, a control section selection unit and a superheat degree adjustment unit, wherein,
the setting and distributing unit is used for setting at least two control sections for each operation mode; distributing corresponding superheat degree and a limited operation interval for each control section;
the control section selection unit is used for calculating the temperature difference between the current environment temperature and the set temperature; distributing corresponding superheat degree and limited operation interval for each control section according to the setting and distributing unit, and determining the limited operation interval to which the temperature difference belongs; selecting a target control section according to the limited operation interval to which the temperature difference belongs;
and the superheat degree adjusting unit is used for judging whether the superheat degree currently set for the electronic expansion valve of the indoor unit is consistent with the superheat degree corresponding to the target control section selected by the control section selecting unit, and if not, adjusting the set superheat degree to the superheat degree corresponding to the target control section.
8. The refrigerant conditioning controller according to claim 7, wherein the setup and distribution unit is configured to:
seven control sections are set for each operation mode; determining the degree of superheat corresponding to any one of the control sections; distributing corresponding superheat degrees to other control sections according to the difference of the superheat degrees corresponding to every two adjacent control sections by 1 degree; the method comprises the steps of allocating a limited operation interval to a first control section of the seven control sections to be (90, 100), allocating a limited operation interval to a second control section of the seven control sections to be (70, 90), allocating a limited operation interval to a third control section of the seven control sections to be (40, 70), allocating a limited operation interval to a fourth control section of the seven control sections to be (20, 40), allocating a limited operation interval to a fifth control section of the seven control sections to be (10, 20), allocating a limited operation interval to a sixth control section of the seven control sections to be (5, 10), allocating a limited operation interval to a seventh control section of the seven control sections to be [0, 5], wherein values in the limited operation intervals represent the demand degree of an indoor unit.
9. The refrigerant conditioning controller according to claim 8,
the control section selection unit is used for determining corresponding demand for the temperature difference by utilizing the following demand calculation formula aiming at the refrigeration mode;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
searching a limited operation interval to which the demand degree belongs;
and/or the presence of a gas in the gas,
the control section selection unit is used for determining corresponding demand for the temperature difference by using the following demand calculation formula aiming at the heating mode;
wherein, the delta T represents the temperature difference between the current environment temperature and the set temperature; DL represents the demand degree;
and searching a limited operation interval to which the demand degree belongs.
10. An air conditioning system, comprising: the refrigerant conditioning controller, outdoor unit, and at least one indoor unit connected to the outdoor unit of any one of claims 7 to 9, wherein,
the refrigerant adjusting controller is connected to the outdoor unit and used for adjusting and controlling the amount of refrigerant conveyed by the outdoor unit to each indoor unit.
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