CN109579213B - Air conditioner temperature control method, storage device and air conditioner - Google Patents

Air conditioner temperature control method, storage device and air conditioner Download PDF

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Publication number
CN109579213B
CN109579213B CN201811426476.6A CN201811426476A CN109579213B CN 109579213 B CN109579213 B CN 109579213B CN 201811426476 A CN201811426476 A CN 201811426476A CN 109579213 B CN109579213 B CN 109579213B
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China
Prior art keywords
temperature
control valve
difference
refrigerant flow
air conditioner
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CN109579213A (en
Inventor
张森涛
叶启明
李蓓
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TCL Air Conditioner Zhongshan Co Ltd
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TCL Air Conditioner Zhongshan Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature

Abstract

The invention discloses an air conditioner temperature control method, storage equipment and an air conditioner, wherein the air conditioner comprises an evaporator with at least two refrigerant flow paths, and each refrigerant flow path is connected with a control valve; when the difference value is lower than or equal to the preset value, closing part of the control valves, reducing the heat exchange area of the evaporator by closing the number of the refrigerant flow paths, and improving the operation energy efficiency of the whole machine; when the difference value is larger than the preset value, the intermediate temperature, the outlet temperature and the current opening degree of each refrigerant flow path are obtained at intervals of preset time, the opening degree of the corresponding control valve is adjusted according to the intermediate temperature, the outlet temperature and the current opening degree until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range so as to adjust the state of the refrigerant flow paths, the refrigeration efficiency of the evaporator is improved, and the operation energy efficiency of the whole machine is improved.

Description

Air conditioner temperature control method, storage device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner temperature control method, storage equipment and an air conditioner.
Background
Along with the improvement of living standard of people, more and more attention is paid to the quality of living environment, and higher requirements are put forward on the use comfort and the energy conservation of the air conditioner. At present, the control of the throttling mode of the electronic expansion valve in the market mostly adopts the mode of exhaust superheat degree and return superheat degree to control the opening degree of the electronic expansion valve, but for a multi-flow-path multi-throttling window type air conditioner, each flow path of an evaporator cannot reach the optimal heat exchange state, so that the energy-saving effect is reduced.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The present invention provides an air conditioner temperature control method, a storage device and an air conditioner, aiming at improving the energy efficiency of the air conditioner.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a temperature control method of an air conditioner, wherein the air conditioner comprises an evaporator with at least two refrigerant flow paths, and each refrigerant flow path is connected with a control valve, the method comprises the following steps:
acquiring the current indoor environment temperature, and calculating the difference value between the current indoor environment temperature and the set temperature;
when the difference value is lower than or equal to the preset value, closing part of the control valve, wherein the preset value is larger than 0;
and when the difference value is larger than the preset value, acquiring the intermediate temperature, the outlet temperature and the current opening of each refrigerant flow path at preset time intervals, and adjusting the opening of the corresponding control valve according to the intermediate temperature, the outlet temperature and the current opening until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range.
The air conditioner temperature control method, wherein, when the difference value is lower than or equal to the preset value, the step of closing part of the control valve specifically comprises the following steps:
and when the difference value is lower than or equal to the preset value and the number of the refrigerant flow paths is equal to two, closing any one control valve.
The air conditioner temperature control method, wherein, when the difference is lower than or equal to the preset value, the step of closing part of the control valves further comprises:
when the difference value is lower than or equal to the preset value and the number of the refrigerant flow paths exceeds two, closing any one control valve for the first time;
judging whether the current indoor environment temperature is greater than the set temperature or not;
if yes, closing one control valve again, and judging whether the current indoor environment temperature is equal to the set temperature or not, and repeating the steps.
The air conditioner temperature control method, wherein if yes, closing a control valve again, and judging whether the current indoor environment temperature is equal to the set temperature, and the method further comprises the following steps after the circulation:
when the current indoor environment temperature is not equal to the set temperature and only one control valve is not closed, the control valve is kept in an open state;
and when the current indoor environment temperature is equal to the set temperature and the rest at least one control valve is not closed, keeping the rest control valves in an open state.
The air conditioner temperature control method includes, when the difference value is greater than the preset value, acquiring an intermediate temperature, an outlet temperature and a current opening degree of each refrigerant flow path at intervals of a preset time, and adjusting the opening degree of a corresponding control valve according to the intermediate temperature, the outlet temperature and the current opening degree until a temperature difference between the intermediate temperature and the outlet temperature is within a preset range:
when the preset value is smaller than the difference value, acquiring the intermediate temperature and the outlet temperature of each refrigerant flow path and the current opening of the control valve corresponding to the refrigerant flow path at preset time intervals;
calculating the temperature difference between the outlet temperature and the intermediate temperature corresponding to each refrigerant flow path;
presetting a corresponding relation between the opening of a control valve and the current opening and the temperature difference;
judging whether the temperature difference is within a preset range or not;
if not, determining the opening degree of each control valve according to the corresponding relation;
and adjusting the current opening of each control valve according to the opening, and circulating according to the current opening until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range.
The air conditioner temperature control method is characterized in that the preset corresponding relation between the opening degree of the control valve and the current opening degree and the temperature difference specifically comprises the following steps:
presetting the opening as a direct proportional function of the current opening, and setting a corresponding relation between a proportional coefficient and the temperature difference, wherein the proportional coefficient is a positive number.
The air conditioner temperature control method is characterized in that the corresponding relation between the proportionality coefficient and the temperature difference is as follows:
when the temperature difference is smaller than or equal to the minimum boundary value of the preset range, the proportionality coefficient is a constant larger than a first preset value, wherein the first preset value is a positive number;
when the maximum boundary value of the preset range is less than or equal to the temperature difference, the proportionality coefficient is a constant less than the first preset value.
The temperature control method of the air conditioner is characterized in that the preset time is 2 min.
A storage device storing a plurality of instructions adapted to be loaded by a processor and to perform the steps of any of the air conditioner temperature control methods described above.
An air conditioner includes a processor adapted to implement instructions; and a storage device adapted to store a plurality of instructions adapted to be loaded by the processor and to perform the steps of any of the air conditioner temperature control methods described above.
Has the advantages that: the method comprises the steps of obtaining the current indoor environment temperature, and calculating the difference value between the current indoor environment temperature and a set temperature; when the difference value is lower than or equal to the preset value, the control valves are closed randomly, the heat exchange area of the evaporator is reduced by closing the number of the refrigerant flow paths, and the operation energy efficiency of the whole machine is improved; when the preset value is smaller than the difference value, the intermediate temperature, the outlet temperature and the current opening degree of each refrigerant flow path are obtained at intervals of preset time, the opening degree of the corresponding control valve is adjusted according to the intermediate temperature, the outlet temperature and the current opening degree until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range, so that the state of the refrigerant flow paths is adjusted, the refrigeration efficiency of the evaporator is improved, the cold output quantity is enhanced, and the operation energy efficiency of the whole machine is improved.
Drawings
FIG. 1 is a flow chart illustrating a method for controlling the temperature of an air conditioner according to a preferred embodiment of the present invention;
fig. 2 is a block diagram of an air conditioner according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The invention will be further explained by the description of the embodiments with reference to the drawings.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for controlling a temperature of an air conditioner according to a preferred embodiment of the present invention. The air conditioner comprises an evaporator with at least two refrigerant flow paths, each refrigerant flow path is connected with a control valve, and the method comprises the following steps:
and S10, acquiring the current indoor environment temperature, and calculating the difference between the current indoor environment temperature and the set temperature.
Specifically, set up temperature sensor on the shell of air conditioner, work as synchronous start when the air conditioner starts temperature sensor, with when the air conditioner operation is adjusted indoor temperature, through temperature sensor carries out real-time detection to current indoor environment temperature to acquire current indoor environment temperature's temperature value.
The invention presets a set temperature which is a temperature more suitable for life of a user, compares the current indoor environment temperature with the set temperature, and calculates the difference value of the current indoor environment temperature and the set temperature to judge the difference between the current indoor environment temperature and the set temperature. In a preferred embodiment, the set temperature is 26 ℃.
And S20, when the difference value is lower than or equal to the preset value, closing part of the control valve, wherein the preset value is larger than 0.
Specifically, the preset value is 3 ℃, and when the air conditioner is started, all control valves are opened; the current indoor environment temperature is higher than the set temperature, the difference value between the current indoor environment temperature and the set temperature is lower than the preset value, the difference between the current indoor environment temperature and the set temperature is smaller, then the current indoor user is more suitable to stop, at the moment, the air conditioner is not required to continuously output large cooling capacity, namely, a plurality of control valves in the plurality of control valves can be closed randomly on the premise that the heat exchange area of the outdoor condenser is unchanged, so that a plurality of refrigerant flow paths are closed, the indoor heat exchange area of the evaporator is reduced, the indoor output cooling capacity is reduced, the integral pressure of the air conditioner is reduced, the integral operation energy efficiency of the whole air conditioner is improved, the difference value between the current indoor environment temperature and the set temperature is reduced, and the comfort of the indoor environment temperature is improved.
Further, the number of the control valves closed in step S20 is less than the number of all the control valves included in the evaporator, that is, it is required to ensure that at least one refrigerant flow path is in an operating state, so as to ensure normal operation of the air conditioner.
Specifically, the step S20 includes:
and S21, when the difference is lower than or equal to the preset value and the number of the refrigerant flow paths is equal to two, closing any one control valve.
In the step S21, the number of the refrigerant flow paths is two, that is, the air conditioner includes two control valves, and the two refrigerant flow paths are connected in parallel; when the difference value is between zero and the preset value or the difference value is equal to the preset value, any one of the two control valves is closed, so that one refrigerant flow path is correspondingly closed, the other refrigerant flow path is kept in an open state, the normal operation of the air conditioner is ensured, the indoor heat exchange area of the evaporator is reduced, the indoor output cold quantity is reduced, the overall pressure of the air conditioner is reduced, the operation energy efficiency of the whole air conditioner is improved, the indoor environment temperature difference change is reduced, and the comfort of the indoor environment temperature is improved.
Further, the step S20 further includes:
s22, when the difference value is lower than or equal to the preset value and the number of the refrigerant flow paths exceeds two, closing any one control valve for the first time;
s23, judging whether the current indoor environment temperature is greater than the set temperature;
and S24, if yes, closing one control valve again, and judging whether the current indoor environment temperature is equal to the set temperature or not, and repeating the steps.
Specifically, when the difference value is compared with the preset value for the first time, the difference value is lower than or equal to the preset value, and the number of the refrigerant flow paths exceeds two, one control valve is selected from the multiple control valves to be closed at first so as to close the corresponding refrigerant flow path, the heat exchange area of the evaporator is reduced, the operation energy efficiency of the whole machine is improved, and the difference value is further reduced.
After any one of the control valves is closed, acquiring the current indoor environment temperature, comparing the current indoor environment temperature with the set temperature, and judging whether the current indoor environment temperature is greater than the set temperature; if yes, randomly selecting one of the control valves which are not closed again to be closed, further reducing the difference value, circularly executing according to the steps, and if not, keeping the execution states of all the control valves at present and continuously monitoring the indoor environment temperature; namely: and continuously acquiring the current indoor environment temperature, judging whether the current indoor environment temperature is greater than the set temperature, if so, randomly selecting one of the control valves which are not closed for the third time to close, and if not, keeping the execution states of all the current control valves, and continuously monitoring the indoor environment temperature until the current indoor environment temperature is less than or equal to the set temperature.
In a preferred embodiment, since several control valves are closed in sequence, in order to make the indoor ambient temperature approach the set temperature, there may be: in a case where the current indoor ambient temperature is sufficiently close to the set temperature but the indoor ambient temperature cannot reach the set temperature even if all the control valves are closed, the method further includes, after step S24:
s25, when the current indoor environment temperature is not equal to the set temperature and only one control valve is not closed, keeping the control valve in an open state;
and S26, when the current indoor environment temperature is equal to the set temperature and the at least one control valve is not closed, keeping the rest of the control valves in an open state.
In a preferred embodiment, the number of the refrigerant flow paths is 4, each refrigerant flow path corresponds to one control valve, when the difference value is lower than or equal to the preset value, the first control valve is closed to close the first refrigerant flow path, the current indoor environment temperature is obtained, whether the current indoor environment temperature is higher than the set temperature or not is judged, if not, the first control valve is kept closed, and the other three control valves are all opened; if yes, closing the second control valve to close the second refrigerant flow path, acquiring the current indoor environment temperature, judging whether the current indoor environment temperature is higher than the set temperature, and if not, keeping the first control valve and the second control valve closed and keeping the other two control valves open; if so, closing the third control valve to close the third refrigerant flow path, acquiring the current indoor environment temperature, and judging whether the current indoor environment temperature is greater than the set temperature, wherein the first refrigerant flow path, the second refrigerant flow path and the third refrigerant flow path are all closed at the moment, only the fourth refrigerant flow path is left unclosed, and in order to keep the normal operation of the air conditioner, the current indoor environment temperature is not compared with the set temperature, but the first refrigerant flow path, the second refrigerant flow path and the third refrigerant flow path are all closed, and only the fourth refrigerant flow path is left open.
And S30, when the difference value is larger than the preset value, acquiring the intermediate temperature, the outlet temperature and the current opening of each refrigerant flow path at preset intervals, and adjusting the opening of the corresponding control valve according to the intermediate temperature, the outlet temperature and the current opening until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range.
Specifically, the intermediate temperature refers to a temperature at an intermediate position of one refrigerant flow path; when the difference value is larger than the preset value, the difference between the indoor environment temperature and the set temperature is larger, and under the condition, when the temperature difference between the intermediate temperature and the outlet temperature is within the preset range, the cold air output quantity can be increased, and the difference value can be reduced as soon as possible, so that the indoor environment temperature is suitable for a user to stay; meanwhile, if the temperature difference between the intermediate temperature and the outlet temperature is within the preset range, the reduction of the heat exchange efficiency of the refrigerant flow path caused by overheating or liquid passing of the refrigerant at the outlet close to the refrigerant flow path can be avoided, the refrigeration efficiency of the evaporator can be enabled to be the highest, and the operation energy efficiency of the whole machine is improved. When the difference value is larger than the preset value, the opening of the control valve is adjusted through the intermediate temperature and the outlet temperature, so that the running state of each refrigerant flow path of the indoor evaporator is controlled, and the purposes of adjusting the indoor environment temperature and improving the energy efficiency of the whole machine are achieved.
Preferably, when the difference is greater than the preset value, the execution state of each control valve is first obtained, whether a closed control valve exists is judged, and if the closed control valve exists, the closed control valve is opened to ensure that all the control valves are in the open state. Further, initially, the opening degrees of all the control valves are rated working condition opening degrees, namely when the air conditioner is started, all the control valves are started to be rated working condition opening degrees, and the air conditioner is executed in a state of keeping the rated working condition opening degrees.
When the difference value is larger than the preset value, acquiring the intermediate temperature, the outlet temperature and the current opening degree of the corresponding control valve of each refrigerant flow path for the first time, adjusting the opening degree of the corresponding control valve according to the intermediate temperature, the outlet temperature and the current opening degree, judging whether the temperature difference between the current intermediate temperature and the outlet temperature is within the preset range when the control valve executes the preset time according to the opening degree, if not, acquiring the intermediate temperature, the outlet temperature and the current opening degree of the corresponding control valve of each refrigerant flow path for the second time, adjusting the opening degree of the corresponding control valve according to the intermediate temperature, the outlet temperature and the current opening degree, and circulating the steps until the temperature difference between the intermediate temperature and the outlet temperature is within the preset range.
The step S30 specifically includes:
s31, when the difference value is larger than the preset value, acquiring the intermediate temperature and the outlet temperature of each refrigerant flow path and the current opening of the control valve corresponding to the refrigerant flow path at preset time intervals;
s32, calculating the temperature difference between the outlet temperature and the intermediate temperature corresponding to each refrigerant flow path;
s33, presetting the corresponding relation between the opening of the control valve and the current opening and the temperature difference;
s34, judging whether the temperature difference is within a preset range;
s35, if not, determining the opening degree of each control valve according to the corresponding relation;
and S36, adjusting the current opening of each control valve according to the opening, and circulating the steps until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range.
When the difference value is larger than the preset value, acquiring the intermediate temperature and the outlet temperature of each refrigerant flow path and the current opening of the control valve corresponding to the refrigerant flow path for the first time, wherein the current opening of each control valve is a rated working condition opening a; calculating the temperature difference between the outlet temperature and the intermediate temperature corresponding to each refrigerant flow path, judging whether the temperature difference is within the preset range, if not, acquiring the opening degree of each control valve according to the corresponding relation between the opening degree of the control valve (the opening degree which the control valve should execute) and the current opening degree and the temperature difference, and adjusting the rated working condition opening degree of each control valve to the corresponding opening degree; and when the preset time is spaced, acquiring the intermediate temperature and the outlet temperature of each refrigerant flow path and the current opening degree of the control valve corresponding to the refrigerant flow path for the second time, calculating the temperature difference between the outlet temperature and the intermediate temperature corresponding to each refrigerant flow path, judging whether the temperature difference is within the preset range, if not, acquiring the opening degree of each control valve according to the corresponding relation between the opening degree of the control valve (the opening degree which the control valve should execute) and the current opening degree and the temperature difference, controlling each control valve to execute the corresponding opening degree, then continuously executing the preset time, and sequentially circulating until the temperature difference between the outlet temperature and the intermediate temperature corresponding to each refrigerant flow path is within the preset range.
The preset corresponding relation between the opening degree of the control valve and the current opening degree and the temperature difference specifically comprises the following steps:
presetting the opening as a direct proportional function of the current opening, and setting a corresponding relation between a proportional coefficient and the temperature difference, wherein the proportional coefficient is a positive number.
The corresponding relation between the proportional coefficient and the temperature difference is specifically as follows:
when the temperature difference is smaller than or equal to the minimum boundary value of the preset range, the proportionality coefficient is a constant larger than a first preset value, wherein the proportionality coefficient and the first preset value are positive numbers;
when the maximum boundary value of the preset range is less than or equal to the temperature difference, the proportionality coefficient is a constant less than the first preset value.
In a preferred embodiment, the preset range is set to be 1 to 3 ℃, the opening is y, the current opening is x, and the proportionality coefficient is k, then the corresponding relationship between the opening and the current opening and the temperature difference is as follows:
wherein the first preset value is 1 ℃, and when the temperature difference is less than or equal to 1 ℃, k is less than 1; when the temperature difference is greater than or equal to 3 ℃, k is greater than 1.
In further embodiments, when the temperature difference is less than or equal to 1 ℃, k = 0.5; when the temperature difference is greater than or equal to 3 ℃, k = 1.5. When the air conditioner is started, the opening degrees of all the control valves are rated working condition opening degrees, namely, initially, k =1, x is equal to the rated working condition opening degree, and y = x.
When the difference is larger than the preset value, the execution state of each control valve is firstly acquired, whether the closed control valve exists or not is judged, and if the closed control valve exists, the closed control valve is opened to ensure that all the control valves are in the opening state. The method comprises the steps of obtaining the intermediate temperature, the outlet temperature and the current opening degree of a control valve corresponding to a refrigerant flow path for the first time, calculating the temperature difference, if the refrigerant flow path with the temperature difference smaller than or equal to 1 ℃ exists, adjusting the opening degree of the control valve corresponding to the refrigerant flow path to be half of the rated working condition opening degree, namely reducing the opening degree of the control valve corresponding to the refrigerant flow path and reducing the refrigerant flow in the refrigerant flow path, and on the premise that the heat exchange area of an evaporator refrigerant flow path is not large, increasing the outlet temperature, so that the temperature difference is increased and the temperature difference is close to the preset range; if a refrigerant flow path with the temperature difference being more than or equal to 3 ℃ exists, the opening degree of the control valve corresponding to the refrigerant flow path is adjusted to be 1.5 times of the rated working condition opening degree, namely the opening degree of the control valve corresponding to the refrigerant flow path is increased, the refrigerant flow in the refrigerant flow path is increased, and the outlet temperature is reduced on the premise that the heat exchange area of the evaporator refrigerant flow path is unchanged, so that the temperature difference is reduced, and the temperature difference is enabled to approach the preset range; when the execution time of the control valve reaches the preset time according to the corresponding opening degree (in a preferred embodiment, the preset time is 2min, and the opening degree of the control valve is adjusted to be half or 1.5 times of the current opening degree, 2min is enough for the corresponding refrigerant flow path to stably operate, so that when the time reaches 2min after the opening degree of the control valve is adjusted and the system stably operates, the temperature of the refrigerant flow path is detected again to calculate and judge the temperature difference and correspondingly adjust again), the intermediate temperature and the outlet temperature of each refrigerant flow path and the current opening degree of the control valve corresponding to the refrigerant flow path are obtained for the second time, the temperature difference is calculated, and if the refrigerant flow path with the temperature difference smaller than or equal to 1 ℃ exists, the opening degree of the control valve corresponding to the refrigerant flow path is adjusted to be half of the current opening degree; and if the refrigerant flow path with the temperature difference being more than or equal to 3 ℃ exists, adjusting the opening degree of the control valve corresponding to the refrigerant flow path to be 1.5 times of the current opening degree, continuously executing for 2min, and sequentially circulating until the temperature difference of all the refrigerant flow paths is within the preset range, and keeping the opening degree unchanged.
The invention provides a storage device, which stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executing the steps of any one of the air conditioner temperature control methods.
The present invention also provides an air conditioner, as shown in fig. 2, which includes a processor 10 adapted to implement instructions; and a storage device 20 adapted to store a plurality of instructions adapted to be loaded by the processor 10 and to perform the steps of any of the air conditioner temperature control methods described above.
In particular, the processor 10 may be, in some embodiments, a central processing unit, microprocessor or other data processing chip for executing program code or processing data stored in the memory device 20.
The storage device 20 may in some embodiments be an internal storage unit of the air conditioner, such as a hard disk or a memory of the air conditioner. The storage device 20 may also be an external memory of the air conditioner in other embodiments, such as a plug-in hard disk provided on the air conditioner, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like.
Further, the storage apparatus 20 may also include both an internal storage unit and an external storage device of the air conditioner. The storage device 20 is used for storing application software installed in the air conditioner and various data; the storage device 20 may also be used to temporarily store data that has been output or is to be output.
In summary, the present invention provides an air conditioner temperature control method, a storage device and an air conditioner, wherein the air conditioner includes an evaporator having at least two refrigerant flow paths, each of the refrigerant flow paths is connected to a control valve, the method includes obtaining a current indoor environment temperature, and calculating a difference between the current indoor environment temperature and a set temperature; when the difference value is lower than or equal to the preset value, closing part of the control valves, reducing the heat exchange area of the evaporator by closing the number of the refrigerant flow paths, and improving the operation energy efficiency of the whole machine; when the preset value is smaller than the difference value, the intermediate temperature, the outlet temperature and the current opening degree of each refrigerant flow path are obtained at intervals of preset time, the opening degree of the corresponding control valve is adjusted according to the intermediate temperature, the outlet temperature and the current opening degree until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range, so that the state of the refrigerant flow paths is adjusted, the refrigeration efficiency of the evaporator is improved, the cold output quantity is enhanced, and the operation energy efficiency of the whole machine is improved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (10)

1. A temperature control method of an air conditioner is characterized in that the air conditioner comprises an evaporator with at least two refrigerant flow paths, each refrigerant flow path is connected with a control valve, and the method comprises the following steps:
acquiring the current indoor environment temperature, and calculating the difference value between the current indoor environment temperature and the set temperature;
when the difference value is lower than or equal to a preset value, closing part of the control valve, wherein the preset value is larger than 0;
and when the difference value is larger than the preset value, acquiring the intermediate temperature, the outlet temperature and the current opening of each refrigerant flow path at preset time intervals, and adjusting the opening of the corresponding control valve according to the intermediate temperature, the outlet temperature and the current opening until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range.
2. The air conditioner temperature control method according to claim 1, wherein the step of closing part of the control valve when the difference value is lower than or equal to the preset value specifically comprises:
and when the difference value is lower than or equal to the preset value and the number of the refrigerant flow paths is equal to two, closing any one control valve.
3. The air conditioner temperature control method according to claim 1, wherein said step of closing a part of the control valve when the difference value is lower than or equal to the preset value further comprises:
when the difference value is lower than or equal to the preset value and the number of the refrigerant flow paths exceeds two, closing any one control valve for the first time;
judging whether the current indoor environment temperature is greater than the set temperature or not;
if yes, closing one control valve again, and judging whether the current indoor environment temperature is equal to the set temperature or not, and repeating the steps.
4. The method as claimed in claim 3, wherein if the step is yes, closing one control valve again, and determining whether the current indoor ambient temperature is equal to the set temperature, and after the cycle further comprising:
when the current indoor environment temperature is not equal to the set temperature and only one control valve is not closed, the control valve is kept in an open state;
and when the current indoor environment temperature is equal to the set temperature and the rest at least one control valve is not closed, keeping the rest control valves in an open state.
5. The method as claimed in claim 1, wherein the step of obtaining an intermediate temperature, an outlet temperature and a current opening degree of each refrigerant flow path at predetermined intervals when the difference is greater than the preset value, and adjusting the opening degree of a corresponding control valve according to the intermediate temperature, the outlet temperature and the current opening degree until a temperature difference between the intermediate temperature and the outlet temperature is within a preset range includes:
when the difference value is larger than the preset value, acquiring the intermediate temperature and the outlet temperature of each refrigerant flow path and the current opening of the control valve corresponding to the refrigerant flow path at preset time intervals;
calculating the temperature difference between the outlet temperature and the intermediate temperature corresponding to each refrigerant flow path;
presetting a corresponding relation between the opening of a control valve and the current opening and the temperature difference;
judging whether the temperature difference is within a preset range or not;
if not, determining the opening degree of each control valve according to the corresponding relation;
and adjusting the current opening of each control valve according to the opening, and circulating according to the current opening until the temperature difference between the intermediate temperature and the outlet temperature is within a preset range.
6. The method according to claim 5, wherein presetting the correspondence between the opening degree of the control valve and the current opening degree and the temperature difference specifically comprises:
presetting the opening as a direct proportional function of the current opening, and setting a corresponding relation between a proportional coefficient and the temperature difference, wherein the proportional coefficient is a positive number.
7. The air conditioner temperature control method according to claim 6, wherein the correspondence between the proportionality coefficient and the temperature difference is specifically:
when the temperature difference is smaller than or equal to the minimum boundary value of the preset range, the proportionality coefficient is a constant larger than a first preset value, wherein the first preset value is a positive number;
when the maximum boundary value of the preset range is less than or equal to the temperature difference, the proportionality coefficient is a constant less than the first preset value.
8. The air conditioner temperature control method according to claim 1, wherein the predetermined time is 2 min.
9. A storage device storing a plurality of instructions adapted to be loaded by a processor and to perform the steps of the air conditioner temperature control method according to any one of claims 1 to 8.
10. An air conditioner, characterized in that it comprises a processor adapted to implement instructions; and a storage device adapted to store a plurality of instructions adapted to be loaded by the processor and to perform the steps of the air conditioner temperature control method of any one of claims 1-8.
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