Self-cleaning control method, device and unit equipment

Abstract

The present invention discloses a self-cleaning control method, device, and unit equipment. The method comprises: in self-cleaning mode, detecting the indoor ambient temperature; if the indoor ambient temperature is less than or equal to a preset low temperature, obtaining a temperature correction coefficient; and controlling the operation of the unit's compressor, internal fan, and electronic expansion valve based on the temperature correction coefficient. With the present invention, when self-cleaning mode is in low-temperature operating conditions, a liquid backflow prevention operation is performed, and the operation of the unit's compressor, internal fan, and electronic expansion valve is controlled based on the temperature correction coefficient. This prevents liquid backflow while maintaining a self-cleaning effect, thereby extending the compressor's service life.

Description

Technical Field

[0001] The present invention relates to the technical field of units, and in particular to a self-cleaning control method, device and unit equipment. Background Art

[0002] The self-cleaning technology of the unit equipment generally requires normal operating conditions to enter self-cleaning mode. However, in low-temperature conditions (for example, ambient temperature below 10°C), when the self-cleaning function is turned on, during the condensation and frosting stages, the internal fan speed is reduced and the suction temperature is too low, resulting in significant liquid backflow in the unit, which in turn affects the service life of the compressor.

[0003] With regard to the problem that self-cleaning operations under low-temperature conditions in the prior art easily lead to liquid backflow, no effective solution has been proposed so far. Summary of the Invention

[0004] The embodiments of the present invention provide a self-cleaning control method, device and unit equipment to solve the problem in the prior art that self-cleaning operations under low-temperature conditions easily lead to liquid backflow.

[0005] In order to solve the above technical problems, the present invention provides a self-cleaning control method, wherein the method includes: in the self-cleaning mode, detecting the indoor ambient temperature; if the indoor ambient temperature is less than or equal to the preset low temperature, obtaining the temperature correction coefficient; and controlling the operation of the compressor, internal fan and electronic expansion valve of the unit according to the temperature correction coefficient.

[0006] Furthermore, in the self-cleaning mode, after detecting the indoor ambient temperature, the method further includes: if the indoor ambient temperature is greater than the preset low temperature, controlling the compressor, internal fan and electronic expansion valve of the unit to run a conventional self-cleaning mode.

[0007] Furthermore, a temperature correction coefficient is obtained by calculating the following formula: K1=t' / t; wherein K1 is the temperature correction coefficient, t' is the indoor ambient temperature, and t is the preset standard ambient temperature.

[0008] Furthermore, the operation of the compressor, internal fan and electronic expansion valve of the unit is controlled according to the temperature correction coefficient, including: controlling the operating frequency of the compressor P1 = K1*P0; controlling the speed of the internal fan R1 = K1*R0; controlling the valve step A1 = K1*A0 of the electronic expansion valve; wherein P0 is the preset frequency of the conventional self-cleaning mode, R0 is the preset speed of the conventional self-cleaning mode, and A0 is the preset valve step of the conventional self-cleaning mode.

[0009] Furthermore, after controlling the operation of the compressor, internal fan and electronic expansion valve of the unit according to the temperature correction coefficient, the method also includes: detecting the internal machine pipe temperature after the unit has been running for a preset period of time; if the internal machine pipe temperature is less than or equal to the preset frost point temperature, obtaining the pipe temperature correction coefficient; and adjusting the operating frequency of the compressor according to the pipe temperature correction coefficient.

[0010] Furthermore, the pipe temperature correction coefficient is obtained by calculation using the following formula: K2=T' / T; wherein K2 is the pipe temperature correction coefficient, T' is the internal unit pipe temperature, and T is the preset frost point temperature.

[0011] Furthermore, adjusting the operating frequency of the compressor according to the pipe temperature correction coefficient includes: controlling the operating frequency of the compressor P2 = (1 + |K2|) * P1; wherein P1 is the operating frequency of the compressor obtained by controlling the temperature correction coefficient.

[0012] Furthermore, after the unit has been running for a preset period of time and the internal pipe temperature has been detected, the method further includes: if the internal pipe temperature is greater than a preset frost point temperature, controlling the compressor, internal fan and electronic expansion valve of the unit to run in a conventional self-cleaning mode.

[0013] Furthermore, after adjusting the operating frequency of the compressor according to the pipe temperature correction coefficient, the method also includes: continuing to detect the internal machine pipe temperature; after the internal machine pipe temperature is greater than the preset frost point temperature, controlling the unit's compressor, internal fan and electronic expansion valve to operate in a conventional self-cleaning mode.

[0014] The present invention also provides a self-cleaning control device, wherein the device includes: a detection module for detecting the indoor ambient temperature in the self-cleaning mode; a control module for obtaining a temperature correction coefficient when the indoor ambient temperature is less than or equal to a preset low temperature; and controlling the operation of the unit's compressor, internal fan and electronic expansion valve according to the temperature correction coefficient.

[0015] The present invention also provides a unit equipment, wherein the unit equipment at least includes the above-mentioned self-cleaning control device.

[0016] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program implements the above method when executed by a processor.

[0017] The technical solution of the present invention implements liquid backflow prevention during low-temperature operating conditions during self-cleaning mode, controlling the operation of the unit's compressor, internal fan, and electronic expansion valve based on a temperature correction factor. This prevents liquid backflow while maintaining self-cleaning effectiveness, extending the compressor's service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a flow chart of a self-cleaning control method according to an embodiment of the present invention;

[0019] Figure 2 is a self-cleaning flow chart of an air conditioning unit according to an embodiment of the present invention;

[0020] Figure 3 4 is a structural block diagram of a self-cleaning control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0022] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "an," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0023] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0024] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0025] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0026] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] Figure 1 is a flow chart of a self-cleaning control method according to an embodiment of the present invention. Figure 1 As shown, the method includes the following steps:

[0029] Step S101: In the self-cleaning mode, the indoor ambient temperature is detected.

[0030] Step S102: If the indoor ambient temperature is less than or equal to the preset low temperature, it indicates a low temperature working condition, and a temperature correction coefficient is obtained.

[0031] Specifically, the temperature correction coefficient can be calculated by the following formula: K1=t' / t; wherein K1 is the temperature correction coefficient, t' is the indoor ambient temperature, and t is the preset standard ambient temperature.

[0032] Step S103: Control the operation of the compressor, internal fan, and electronic expansion valve of the unit according to the temperature correction coefficient.

[0033] In step S104, if the indoor ambient temperature is greater than the preset low temperature, the compressor, indoor fan, and electronic expansion valve of the unit are controlled to operate in a normal self-cleaning mode. In normal self-cleaning mode, the operating frequency of the compressor is set to P0 (unit: Hz), the speed of the indoor fan is set to R0 (unit: R, revolutions), and the valve step of the electronic expansion valve is set to A0 (unit: A, steps).

[0034] During self-cleaning mode, if low-temperature conditions are determined (for example, the indoor ambient temperature is below 10°C), liquid backflow prevention is activated. This involves controlling the operation of the unit's compressor, internal fan, and electronic expansion valve based on a temperature correction factor. Specifically, this can be achieved using the following formulas: compressor operating frequency P1 = K1 * P0; internal fan speed R1 = K1 * R0; and electronic expansion valve step A1 = K1 * A0. This allows the compressor, internal fan, and electronic expansion valve to be adjusted based on the temperature correction factor, preventing liquid backflow due to incomplete evaporation in the evaporator caused by poor heat exchange capacity in low-temperature conditions, leading to excessive liquid entering the compressor.

[0035] After the anti-liquid backflow operation is performed, the internal pipe temperature is detected after the unit has run for a preset period of time.

[0036] If the internal pipe temperature is greater than the preset frost point temperature T, it means that the condensation of the unit is normal, then the compressor, internal fan and electronic expansion valve of the unit are controlled to run in the normal self-cleaning mode, that is, the operating frequency of the compressor is adjusted to P0, the speed of the internal fan is adjusted to R0, and the valve step of the electronic expansion valve is adjusted to A0.

[0037] If the internal unit pipe temperature is less than or equal to the preset frost point temperature T, indicating that the unit has condensation abnormalities, the pipe temperature correction coefficient is obtained. Specifically, it can be calculated using the following formula: K2 = T' / T; where K2 is the pipe temperature correction coefficient, T' is the internal unit pipe temperature, and T is the preset frost point temperature. The operating frequency of the compressor is then adjusted based on the pipe temperature correction coefficient. This can be achieved specifically through the following preferred implementation: controlling the compressor operating frequency P2 = (1 + |K2|) * P1; where P1 is the compressor operating frequency obtained by controlling the temperature correction coefficient. It should be noted that the compressor operating frequency cannot be higher than the unit's initial self-cleaning frequency. Based on this, the compressor operation can be adjusted in a timely manner to prevent condensation abnormalities from affecting the unit's operation. The internal unit pipe temperature is then continuously detected. When the internal unit pipe temperature is greater than the preset frost point temperature, the unit's compressor, internal fan, and electronic expansion valve are controlled to operate in normal self-cleaning mode.

[0038] This embodiment, when operating in self-cleaning mode and at low temperatures, implements liquid backflow prevention, controlling the operation of the unit's compressor, internal fan, and electronic expansion valve based on a temperature correction factor. Furthermore, if abnormal condensation is detected, the compressor's operating frequency is adjusted based on the pipe temperature correction factor. This prevents liquid backflow while maintaining self-cleaning effectiveness, extending the compressor's service life.

[0039] Example 2

[0040] Figure 2 : is a self-cleaning flow chart of an air-conditioning unit according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0041] Step S201, entering self-cleaning mode.

[0042] Step S202: The indoor temperature sensor detects the indoor temperature t'.

[0043] Step S203 , determining whether the indoor ambient temperature t′ is ≤ 10° C., if so, executing step S205 , if not, executing step S204 .

[0044] In step S204, the unit operates in a normal self-cleaning mode: the operating frequency of the compressor is P0, the speed of the internal fan is R0, and the valve step of the electronic expansion valve is A0. Then, step S209 is executed.

[0045] Step S205: determine that it is a low temperature working condition and enter the anti-liquid backflow operation.

[0046] Step S206 , calculating the temperature correction coefficient: K1=t′ / t; wherein t′ is the indoor ambient temperature, and t is the preset standard ambient temperature.

[0047] Step S207, control the operating frequency of the compressor P1 = K1 * P0; control the speed of the internal fan R1 = K1 * R0; control the valve step A1 = K1 * A0 of the electronic expansion valve.

[0048] Assuming a preset standard ambient temperature of 27°C, P0 is 300 Hz, R0 is 960 rpm, and A0 is 96 steps. For an indoor ambient temperature of t' = 9°C, the temperature correction factor K1 = 9 / 27 = 1 / 3. Therefore, the electronic expansion valve's valve steps A1 = 1 / 3 * 300 = 100 steps, the indoor fan speed R1 = 1 / 3 * 960 = 320 rpm, and the compressor's operating frequency P1 = 1 / 3 * 96 = 32 Hz.

[0049] Step S208: After the unit has been running for 10 minutes, the internal pipe temperature T' is detected to determine whether the internal pipe temperature T' is ≤ the preset frost point temperature T. If so, it indicates that the unit condensation is abnormal, and step S210 is executed. If not, it indicates that the unit condensation is normal, and step S209 is executed.

[0050] In step S209, if the condensation of the unit is normal, the normal frosting, defrosting and sterilization operations will begin after the condensation and frost, and then the self-cleaning mode will end.

[0051] Step S210: If the unit has condensation abnormality, calculate the pipe temperature correction coefficient: K2=T' / T; wherein K2 is the pipe temperature correction coefficient, T' is the internal unit pipe temperature, and T is the preset frost point temperature.

[0052] Step S211, adjust the operating frequency of the compressor P2 = (1 + |K2|) * P1 until it is detected that T' is greater than T, and the unit enters the normal self-cleaning mode again.

[0053] Assuming the preset frost point temperature T is -1°C and the internal pipe temperature T' is -3°C, the pipe temperature correction coefficient K2 = -3 / (-1) = -3. The compressor operating frequency is adjusted to P2 = (1 + |-3|) * 32 = 128 Hz. However, it should be noted that the compressor operating frequency cannot be higher than the unit's initial self-cleaning frequency (P0 = 96 Hz), so P2 = 96 Hz.

[0054] This embodiment can avoid the problem of short compressor life due to liquid return under low-temperature self-cleaning conditions, and can also avoid the problem of premature frost in the room due to insufficient condensed water during the self-cleaning condensation stage due to the low indoor ambient temperature, which affects the self-cleaning effect.

[0055] Example 3

[0056] Corresponding to Figure 1 The self-cleaning control method described in this embodiment provides a self-cleaning control device, such as Figure 3 The structure block diagram of the self-cleaning control device shown in FIG. 1 includes:

[0057] The detection module 10 is used to detect the indoor ambient temperature in the self-cleaning mode;

[0058] The control module 20 is used to obtain the temperature correction coefficient when the indoor ambient temperature is less than or equal to the preset low temperature; control the operation of the unit's compressor, internal fan and electronic expansion valve according to the temperature correction coefficient; if the indoor ambient temperature is greater than the preset low temperature, control the unit's compressor, internal fan and electronic expansion valve to operate in a conventional self-cleaning mode. In the conventional self-cleaning mode, the operating frequency of the compressor is set to P0, the speed of the internal fan is set to R0, and the valve step of the electronic expansion valve is set to A0.

[0059] This embodiment also provides a unit device, including at least the self-cleaning control device described above, to avoid liquid backflow during the unit's self-cleaning mode and ensure the unit's service life. The specific application process of the self-cleaning control device has been described above and will not be repeated here.

[0060] Example 4

[0061] An embodiment of the present invention provides a software for executing the technical solutions described in the above embodiment and preferred implementation manner.

[0062] An embodiment of the present invention provides a non-volatile computer storage medium, wherein the computer storage medium stores computer-executable instructions, and the computer-executable instructions can execute the self-cleaning control method in any of the above method embodiments.

[0063] The above-mentioned software is stored in the above-mentioned storage medium, which includes but is not limited to: a CD, a floppy disk, a hard disk, a rewritable memory, etc.

[0064] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0065] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0066] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A self-cleaning control method, characterized in that: The method comprises: In self-cleaning mode, detect the indoor ambient temperature; If the indoor ambient temperature is less than or equal to the preset low temperature, a temperature correction coefficient is obtained, which is calculated using the following formula: K1=t' / t; wherein K1 is the temperature correction coefficient, t' is the indoor ambient temperature, and t is the preset standard ambient temperature; The operation of the compressor, internal fan and electronic expansion valve of the unit is controlled according to the temperature correction coefficient; including: controlling the operating frequency P1=K1*P0 of the compressor; controlling the speed R1=K1*R0 of the internal fan; controlling the valve step A1=K1*A0 of the electronic expansion valve; wherein P0 is the preset frequency of the conventional self-cleaning mode, R0 is the preset speed of the conventional self-cleaning mode, and A0 is the preset valve step of the conventional self-cleaning mode.

2. The method according to claim 1, characterized in that In the self-cleaning mode, after detecting the indoor ambient temperature, the method further includes: If the indoor ambient temperature is greater than the preset low temperature, the compressor, the internal fan and the electronic expansion valve of the control unit are controlled to run in a conventional self-cleaning mode.

3. The method according to any one of claims 1 to 2, characterized in that After controlling the operation of the compressor, the internal fan, and the electronic expansion valve of the unit according to the temperature correction coefficient, the method further includes: After the unit has been running for a preset period of time, the internal pipe temperature is detected; If the internal machine pipe temperature is less than or equal to the preset frost point temperature, obtaining a pipe temperature correction coefficient; The operating frequency of the compressor is adjusted according to the pipe temperature correction coefficient.

4. The method according to claim 3, characterized in that Obtain the pipe temperature correction coefficient, which can be calculated using the following formula: K2=T' / T; wherein K2 is the pipe temperature correction coefficient, T' is the internal unit pipe temperature, and T is the preset frost point temperature.

5. The method according to claim 4, characterized in that Adjusting the operating frequency of the compressor according to the pipe temperature correction coefficient includes: The operating frequency of the compressor is controlled to be P2=(1+|K2|)*P1; wherein P1 is the operating frequency of the compressor obtained by controlling the temperature correction coefficient.

6. The method according to claim 3, characterized in that After the unit has been running for a preset period of time and the internal unit pipe temperature has been detected, the method further includes: If the internal machine pipe temperature is greater than the preset frost point temperature, the compressor, internal fan and electronic expansion valve of the control unit will run in a conventional self-cleaning mode.

7. The method according to claim 3, characterized in that After adjusting the operating frequency of the compressor according to the pipe temperature correction coefficient, the method further includes: Continue to detect the internal machine pipe temperature; After the internal machine pipe temperature is greater than the preset frost point temperature, the compressor, internal fan and electronic expansion valve of the control unit are controlled to run in a conventional self-cleaning mode.

8. A self-cleaning control device for implementing the self-cleaning control method according to any one of claims 1 to 7, characterized in that: The device comprises: A detection module is used to detect the indoor ambient temperature in the self-cleaning mode; The control module is used to obtain a temperature correction coefficient when the indoor ambient temperature is less than or equal to a preset low temperature; and control the operation of the compressor, internal fan and electronic expansion valve of the unit according to the temperature correction coefficient.

9. A unit equipment, characterized in that: The unit equipment at least includes the self-cleaning control device according to claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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