Control method of electronic expansion valve, air conditioner and computer equipment

[0042] Next, the technical solutions in the embodiments of the present invention will be described in the following examples, and the described embodiments are merely, not all of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained without creative labor are not made in the premise of creative labor.

[0043] Incidentally, in this embodiment all directional indications (such as up, down, left, right, front, rear, etc.) for explaining the embodiment of the present invention, only a relatively lower between the components (as shown in the drawings) in a particular posture positional relationship, movement, etc., if the specified position is changed, then the directional indicator will change accordingly, the connection may be a direct connection, or may be an indirect connection.

[0044] The term "and / or" merely describe a relationship of associated objects representing three relationships may exist, e.g., A and B, can be expressed: A exists alone, A and B are simultaneously present, it is present alone B three situations.

[0045] Further, as described in the present invention, as described in the description of "first", "second", etc., is only used to describe purposes, and cannot be understood as an indication or implies its relative importance or implicitting the number of techniques indicated. Thus, the features of "first", "second" are defined, and at least one of the features may be indicated or implicitly. In addition, the technical solution between the various embodiments can be combined with each other, but it must be based on those of ordinary skill in the art. When the combination of the technical solution occurs or cannot be realized, the binding of this technical solution does not exist. It is not within the scope of the invention.

[0046] Refer figure 1 The present invention proposes a method for controlling an electronic expansion valve, comprising:

[0047] S1: detecting a current operating mode;

[0048] S2: detecting when the current operating mode is a cooling mode, real-time access external ambient temperature and a condensation temperature of the runtime;

[0049] S3: The ambient temperature of the outer and the condensing temperature calculated degree of superheat;

[0050] S4: electronic expansion valve opening degree of the control according to the degree of superheat.

[0051] As described in the above embodiment step S1, the detected current operating mode may be directly detected air-conditioning command, then get the current mode of operation, or the detection mode select command input by the user or automatic mode selection instruction, then get the current mode of operation, It should be understood that the present invention is not limited to this, can be used to obtain the current operating mode can be air-conditioned. The detection mode may be detected in real time, for example, set a fixed time interval, detecting the primary current operating mode every time interval, or when the detected air-conditioning start time only, and then be detected when switching the operation mode, since the real-time detection will be unnecessary computation cost, and therefore preferred embodiment the detection of the latter. Incidentally, the present application refers to the operation mode is the cooling mode and the heating mode, the other is not (e.g., a dehumidification mode) mode.

[0052] As described in the above-described step S2, the current operation mode is a cooling mode, real-time access and condensation outside ambient temperature, wherein the temperature of the external environment outside ambient temperature in which the air conditioning unit, since the air conditioning unit is generally disposed outdoors, therefore the ambient temperature is normally outside the outdoor temperature, the way may be acquired by a temperature sensor disposed in an environment in which the air conditioning unit, and then connected to the temperature sensor data, and then obtain corresponding to the ambient temperature outside. A condensation temperature is positively related to the actual temperature value of the exhaust gas temperature, the actual temperature of the exhaust gas temperature sensor may be provided at a position corresponding to, and then acquires the temperature detected by the temperature sensor is acquired.

[0053] As described above in step S3, the outer and calculates the degree of superheat according to the ambient temperature and condensation temperature, the temperature difference when the degree of superheat of condensation, the temperature difference will be greater than the condensation, the subsequent calculations are detailed manner, this at not repeat them.

[0054] As described in the above step S4, the opening degree of superheat degree control of electronic expansion valves, when the overheating is too large, may be the opening rate of the electronic expansion valve when the superheat is too small, the electronic expansion valve may be opened transfer large degree.

[0055] In this embodiment, the above-described step S3, the comprising:

[0056]S301: According to the formula = SH3 T4L-T7 calculated degree of superheat, where T4L = min {T4, t}, T4 is said outside ambient temperature, t is a given temperature, SH3 to the superheat, T7 of the condensate dew temperature.

[0057] As described above in step S301, = T4L-T7 SH3 calculated according to the formula, which is the minimum T4L T4 and the ambient temperature outside a predetermined temperature t is, this is to prevent external ambient temperature is too high, causing the calculated degree of superheat than large, thereby enabling the electronic expansion valve opening degree of the adjustment is too small, impact air conditioning performance, it is necessary to set a predetermined temperature t, for example, setting a specified temperature is 40 ℃, when greater than this temperature, it is possible that the opening degree of the electronic expansion valve further this increase will not cause a greater effect condensation, thus T4L may be taken to a minimum value T4 and the outside ambient temperature in a predetermined temperature t.

[0058] In this embodiment, the above-described step S4, comprising:

[0059] S401: determining the degree of superheat is less than a first predetermined value;

[0060] S402: If less than the first target exhaust gas temperature is calculated, wherein the calculating the first target exhaust gas temperature to a first target exhaust temperature formulas = a × F + b + T4 + g (F), a, b is provided predetermined parameters, F is the frequency of the press, T4 is said outside ambient temperature, g (F) is associated with the function F;

[0061] S403: The actual exhaust gas temperature is compared with the first target exhaust gas temperature;

[0062] S404: adjusting the opening degree of the electronic expansion valve based on the comparison.

[0063] As the above-described steps S401-S404, determines the degree of superheat is less than a first predetermined value, wherein the first predetermined value is set in advance, for example, 2 ℃, if less than the first target exhaust gas temperature is considered greater impact on the performance of the air conditioner, may be employed to calculate a first target exhaust gas temperature, i.e., a first target exhaust gas temperature by the equation = a × F + b + T4 + g (F), and then acquires actual exhaust temperature, the actual temperature of the exhaust gas as described above, can be obtained by the temperature sensor, and then compared with a first target exhaust gas temperature, and if the result of the first target exhaust gas temperature is high, the opening degree of the electronic expansion valve will transfer large If the comparison result is the actual exhaust temperature is higher, then the opening rate of the electronic expansion valve, if the same is not required to adjust the opening degree of the electronic expansion valve. Additionally, F may also be a specific frequency conversion press.

[0064] In this embodiment, after the above step S401, the further comprising:

[0065] S4021: If less than 10, determines the degree of superheat is less than a second predetermined value; wherein the second preset value is greater than a first predetermined value;

[0066] S4022: If the degree of superheat is less than a second predetermined value, controlling the electronic expansion valve to maintain the current opening degree.

[0067] As the above-described steps S4021-S4022, detects the current degree of superheat is less than a second predetermined value, the second predetermined value is also a value set in advance, for example, 3 ℃, i.e. when the degree of superheat is greater than or equal to a first predetermined value and smaller than a second predetermined value, it is considered better performance of the air conditioning operation, the electronic expansion valves does not need to be adjusted to maintain the current opening degree of the electronic expansion valve.

[0068] In this embodiment, after the above step S4021, further comprising:

[0069] S40221: If less than, the electronic expansion valve is calculated transfer a small number of steps need to M; where M = (actual exhaust gas temperature - the first target exhaust gas temperature) × k, k is a parameter set;

[0070] S40222: the electronic expansion valve M turndown step.

[0071] As described above in step S40221-S40222, if not less than, the opening degree of the need to transfer a small electronic expansion valve, the actual exhaust temperature is lowered, so that the calculated degree of superheat is less than a second predetermined value, the air conditioner to maintain normal performance. DETAILED then transfer a small number of steps M, prevented the transfer of the electronic expansion valve is too small, the calculated degree of superheat is less than a first predetermined value calculated by the formula, and therefore, can be calculated by the above formula, then the calculated according to the real-time calculating, in some embodiments, since the minimum opening degree of the electronic expansion valve 90 is generally step, the current opening degree of the electronic expansion valve is insufficient to support the transfer of small M-step, the electronic expansion valve may be closed for a period according to a certain frequency, for example, one minute period, length 20s electronic expansion valve is closed, until the degree of superheat is less than the second predetermined value.

[0072] In this embodiment, the above-described step S4, comprising:

[0073] S411: determining the degree of superheat is within a predetermined range;

[0074] S412: if yes, retaining the opening of the electronic expansion valve.

[0075] As the above-described steps S411-S412, judgment is calculated according to the ambient temperature outside the acquired real-time and run-time condensation temperature superheat is within a predetermined range, it will be appreciated that, the predetermined range may be a first preset value and the range between the second predetermined value, may not in this range, the electronic expansion valve in order to prevent multiple adjustments, may be equal to a first predetermined value in the calculated degree of superheat is greater than and less than a second predetermined value after re-setting the preset range, and then determines the degree of superheat is within a predetermined range, and if so, the current opening degree can be maintained.

[0076] In this embodiment, after the above steps S1, further comprising:

[0077] S201: detecting when the current operation mode is a heating mode, by the formula: a second target exhaust gas temperature = a × F + b × Tw_out + c + d is calculated second target exhaust gas temperature, wherein F is press frequency, a, b, c, d is a parameter set, Tw_out temperature of the water is discharged;

[0078] S202: The actual exhaust gas temperature is compared with the second target exhaust gas temperature;

[0079] S203: The result of the comparison to adjust the opening degree of the electronic expansion valve.

[0080] As the above-described steps S201-S203, the current operation mode is the heating mode, the second target exhaust gas temperature can be calculated by the formula, and then compared with the actual exhaust gas temperature, if the actual exhaust gas temperature is less than a second target exhaust the temperature of the small opening of the electronic expansion valve closed; the contrary, the large opening of the electronic expansion valve opening degree; Dole actual exhaust temperature is equal to the target exhaust valve opening degree of the electronic expansion remains unchanged.

[0081] Before S201, the step may also be, in some embodiments, the actual exhaust gas temperature is compared with the second target exhaust temperature detected by the environment outside the detection, determines whether the ambient temperature is greater than the outer particular temperature value, wherein the specific temperature the fixed temperature value is set by the air conditioning system, when the outer ambient temperature is greater than a particular temperature value, when the temperature probe by the outer ambient temperature is small, it can be controlled by the above-described second target exhaust temperature. When the outside ambient temperature is less than or equal to a particular temperature value, using the second target exhaust gas temperature control, less than optimal operating state, and therefore the water temperature of the linkage as a frequency step may be employed to control valve, in particular, the target opening degree = y × F + z; where F is the frequency; target opening degree as the target opening degree of electronic expansion valves, wherein the value of y and z refer to the following table

[0082] T4 temperature range y z -17 degrees 0.8 13 -17 ~ -3 degrees 0.8 TW_OUT + 1 -3 ~ N degrees 0.9 TW_OUT + 20

[0083] Wherein the water temperature is Tw_out, n is a particular temperature value.

[0084] Advantageous effects of the invention: by detecting a current running mode, when a cooling mode, and then calculating the degree of superheat acquired in real time according to the ambient temperature outside and condensation temperature, and controls the opening degree of the electronic expansion valve based on the degree of superheat, according enabling real-time dynamic control of the case of an electronic expansion valve, the air conditioner is always operated at the preferred state.

[0085] Refer figure 2 The present invention further provides an air conditioner, comprising:

[0086] Operation mode detection module 10 for detecting a current operating mode;

[0087] Temperature acquisition module 20 for detecting when the current operation mode is the cooling mode, real-time access external ambient temperature and a condensation temperature of the runtime;

[0088] Superheat calculation module 30, for the outside ambient temperature and the condensing temperature calculated according to the degree of superheat;

[0089] The opening degree of the control module 40, for controlling the opening degree of the superheat degree of the electronic expansion valve based.

[0090] Detecting a current operating mode of mode may be a command directly detect the air conditioner performs, thereby obtaining current operating mode, or detection command selection mode input by the user or the automatic selection command mode, then get the current mode of operation, it should be understood that the present invention which is not limited, can be used to obtain the current operating mode can be air-conditioned. The detection mode may be detected in real time, for example, set a fixed time interval, detecting the primary current operating mode every time interval, or when the detected air-conditioning start time only, and then be detected when switching the operation mode, since the real-time detection will be unnecessary computation cost, and therefore preferred embodiment the detection of the latter. Incidentally, the present application refers to the operation mode is the cooling mode and the heating mode, the other is not (e.g., a dehumidification mode) mode.

[0091] When the current operation mode is a cooling mode can be acquired in real time and the ambient temperature outside the condensation temperature, wherein the outside ambient temperature is a temperature of the external environment in which the air conditioning unit, since the air conditioning unit is generally disposed outdoors, and therefore the outer ambient temperature is usually the outdoor temperature, the way may be acquired by a temperature sensor disposed in an environment in which the air conditioning unit, and then connected to the temperature sensor data, and further can obtain the temperature corresponding to the extracellular environment. A condensation temperature is positively related to the actual temperature value of the exhaust gas temperature, the actual temperature of the exhaust gas temperature sensor may be provided at a position corresponding to, and then acquires the temperature detected by the temperature sensor is acquired.

[0092] The outside ambient temperature is then calculated and the degree of superheat condensation temperature, the temperature difference when the degree of superheat of condensation, condensation will be larger than this temperature difference, the subsequent calculations are detailed manner, is not repeated here.

[0093] The opening degree of superheat degree control of electronic expansion valves, when the overheating is too large, may be an electronic expansion valve opening rate, when the superheat hours, you can adjust the degree of opening of the electronic expansion valve is large.

[0094] In this embodiment, the degree of superheat calculation module 30, comprising:

[0095] Superheat calculation sub-module, for calculating the degree of superheat according to the formula SH3 = T4L-T7, where T4L = min {T4, t}, T4 is said outside ambient temperature, t is a given temperature, SH3 to the superheat degree , T7 to the condensation temperature.

[0096] = T4L-T7 SH3 calculated according to the formula, wherein T4L is the minimum value T4 and the outside ambient temperature in a predetermined temperature t, this is to prevent external ambient temperature is too high, causing a large degree of superheat is calculated, thereby enabling the electronic expansion valve adjusting the opening degree is too small, affecting air conditioning performance, it is necessary to set a predetermined temperature t, for example, setting a specified temperature is 40 ℃, when the temperature is greater than can be considered to further increase the opening degree of the electronic expansion valve is not this condensation greater impact, thus T4L may be taken to a minimum value T4 and the outside ambient temperature in a predetermined temperature t.

[0097] In this embodiment, the opening degree of the control module 40, comprising:

[0098] The degree of superheat determination sub-module, for determining the degree of superheat is less than a first predetermined value;

[0099] A first target exhaust temperature calculation module, configured to, if the degree of superheat is less than a first predetermined value, a first target exhaust gas temperature is calculated, wherein the calculating the first target exhaust gas temperature to a first target exhaust temperature formulas = a × F + b + T4 + g (F), a, b is the parameter set, F is the frequency of the press, T4 is said outside ambient temperature, g (F) is associated with the function F;

[0100] A first comparison sub-module target exhaust temperature, the actual exhaust gas temperature for the first target exhaust gas temperature;

[0101] The degree of opening adjustment module for adjusting the electronic expansion valve opening degree according to the comparison result.

[0102] Determining the degree of superheat is less than a first predetermined value, wherein the first predetermined value is set in advance, for example, 2 ℃, if less than, greater impact is considered a first target exhaust temperature of air conditioner performance, may be employed to calculate a first target exhaust gas temperature, i.e., a first target exhaust gas temperature by the equation = a × F + b + T4 + g (F), and then obtain the actual exhaust gas temperature, the exhaust gas temperature as the actual can be obtained by the temperature sensor, and then compared with a first target exhaust temperature, when the comparison result of the first target exhaust gas temperature is high, a large opening degree of the electronic expansion valve will be adjusted, and if the result is the actual exhaust temperature higher, then the opening rate of the electronic expansion valve, if the same is not required to adjust the opening degree of the electronic expansion valve. Further, F is a specific frequency may also be frequency press.

[0103] In this embodiment, the opening degree of the control module 40, further comprising:

[0104] The second predetermined value determination sub-module, configured to, if the degree of superheat is not less than a first predetermined value, it is determined that the degree of superheat is less than a second predetermined value; wherein the second preset value is greater than a first predetermined value;

[0105] Sub-module holding the current opening degree, for less than a second predetermined value when the degree of superheat, the control of the electronic expansion valve to maintain the current opening degree.

[0106] Detecting the current degree of superheat is less than a second predetermined value, the second predetermined value is also a value set in advance, for example, 3 ℃, i.e. when the degree of superheat is greater than or equal to a first predetermined value and less than a second predetermined value can be considered better performance of the air conditioning running, no need to adjust the electronic expansion valve, to keep the current opening of the electronic expansion valve.

[0107] In this embodiment, the opening degree of the control module 40, further comprising:

[0108] Step number calculation sub-module, if not for less than 10, the electronic expansion valve is calculated turndown required number of steps M; where M = (actual exhaust gas temperature - the first target exhaust gas temperature) × k, k is set parameters;

[0109] Tone kid module, the electronic expansion valve for adjusting the M small steps.

[0110] If not less than, then the opening rate of the required electronic expansion valve, to reduce the actual temperature of the exhaust gas, so that the calculated degree of superheat is less than a second predetermined value, maintain normal performance of the air conditioner. DETAILED then transfer a small number of steps M, prevented the transfer of the electronic expansion valve is too small, the calculated degree of superheat is less than a first predetermined value calculated by the formula, and therefore, can be calculated by the above formula, then the calculated according to the real-time calculating, in some embodiments, since the minimum opening degree of the electronic expansion valve 90 is generally step, the current opening degree of the electronic expansion valve is insufficient to support the transfer of small M-step, the electronic expansion valve may be closed for a period according to a certain frequency, for example, one minute period, length 20s electronic expansion valve is closed, until the degree of superheat is less than the second predetermined value.

[0111] In this embodiment, the opening degree of the control module 40, comprising:

[0112] Preset range determination sub-module, for determining the degree of superheat is within a predetermined range;

[0113] Submodule opening is maintained, if used, remains the opening of the electronic expansion valve.

[0114] Analyzing acquired in real time according to the ambient temperature outside the runtime and condensing temperature calculated degree of superheat is within a predetermined range, it will be appreciated that, the predetermined range may be between the first predetermined value and the second preset value after the range, may not in this range, the electronic expansion valve in order to prevent multiple adjustments, may be greater than equal to a first predetermined value and less than a second predetermined value in the calculated degree of superheat, the preset resetting range, then and then determines the degree of superheat is within a predetermined range, and if so, the current opening degree can be maintained.

[0115] Embodiment, the air conditioner of the present embodiment, further comprising:

[0116] The second target exhaust temperature calculation module, for detecting when the current operation mode is a heating mode, by the formula: a second target exhaust gas temperature = a × F + b × Tw_out + c + d calculates a second target exhaust gas temperature, where F is the frequency of the press, a, b, c, d is a parameter set, Tw_out temperature of the water is discharged;

[0117] The second target exhaust temperature comparison module for the actual exhaust gas temperature to the second target exhaust gas temperature;

[0118] Opening adjustment means for adjusting the opening degree of the electronic expansion valve based on the comparison.

[0119] The current operation mode is the heating mode, the second target exhaust gas temperature can be calculated by the formula, and then compared with the actual exhaust gas temperature, if the actual exhaust gas temperature is less than a second target exhaust gas temperature small electronic expansion valve opening degree is OFF ; contrary, the large opening of the electronic expansion valve opening degree; Dole actual exhaust temperature is equal to the target exhaust valve opening degree of the electronic expansion remains unchanged.

[0120] In some embodiments, the air conditioner can also be detected outside the environmental testing, determining whether the external ambient temperature is greater than a particular temperature value, wherein the specific temperature is based on a fixed temperature value set by the air conditioning system, when the outer ambient temperature is greater than the specific temperature value during which time the temperature probe by the outer ambient temperature is small, it can be controlled by the above-described second target exhaust temperature employed. When the outside ambient temperature is less than or equal to a particular temperature value, using the second target exhaust gas temperature control, less than optimal operating state, and therefore the water temperature of the linkage as a frequency step may be employed to control valve, in particular, the target opening degree = y × F + z; where F is the frequency; target opening degree as the target opening degree of electronic expansion valves, wherein the value of y and z refer to the following table

[0121] T4 temperature range y z -17 degrees 0.8 13 -17 ~ -3 degrees 0.8 TW_OUT + 1 -3 ~ N degrees 0.9 TW_OUT + 20

[0122] Wherein the water temperature is Tw_out, n is a particular temperature value.

[0123] refer to image 3 The present application also provides a storage medium 100, storage medium 100 stores a computer program 200, when it is run on a computer, causes a computer to execute the above method for controlling an electronic expansion valve according to the described embodiment.

[0124] refer to Figure 4 The present application also provides a computer apparatus 300 comprising the storage medium 100, 100 when the storage medium storing a computer program 200 running on a computer device 300, the computer device 300 such that the inside thereof is provided by the processor 400 to perform the the method of controlling an electronic expansion valve according to the above described embodiments.

[0125] In the above embodiment, it can be achieved through software, hardware, firmware, or any combination thereof in whole or in part. When implemented using software, you can fully or partially in the form of a computer program product.

[0126] The computer program product includes one or more computer instructions. When loading and executing the computer program instruction on a computer, all or partially generated the flow or function as described in accordance with the present application embodiment. The computer can be a general purpose computer, a dedicated computer, a computer network, or another programmable device. The computer instructions may be stored in a storage medium or transferred from another storage medium to a storage medium, e.g., the computer instructions from a website site, a computer, a server or data center via a wired (e.g., coaxial cable, fiber optic , digital subscriber line (the DSL)), or wireless (e.g., infrared, radio, microwave, etc.) to be transmitted in another site station, a computer, a server or data center. The storage medium may be any available media that can be stored in a computer or comprising one or more available media integrated server, data centers and other data storage devices. The available medium can be a magnetic medium, (eg, a floppy disk, a hard disk, a tape, a photoreaterial (eg, a DVD), or a semiconductor medium (e.g., a solid-state hard disk SOLID State Disk (SSD)).

[0127] It is merely preferred embodiments of the present invention, and is not intended to limit the invention, and those skilled in the art can have various changes and variations. Any modification, equivalent replacement, improvement, etc. according to the invention should be included in the claims of the invention.