Anti-cold air control method and device for cabinet machine, cabinet machine, storage medium

Abstract

The application relates to the technical field of air conditioners, and discloses a cold-blast prevention control method for a cabinet air conditioner, wherein the indoor unit of the cabinet air conditioner comprises a micro-channel heat exchanger and an indoor fan, the micro-channel heat exchanger is provided with a temperature sensor for detecting the coil temperature value of the micro-channel heat exchanger, and the method comprises the following steps: in the case that the cabinet air conditioner operates in a heating mode, the coil temperature value of the micro-channel heat exchanger is acquired; according to the updating condition of the coil temperature value, the electronic expansion valve is subjected to an opening valve compensation treatment, the refrigerant flow of the micro-channel heat exchanger is increased to increase the coil temperature value of the micro-channel heat exchanger, and the rotating speed value of the indoor fan is maintained. The method can reduce the adverse influence of the rotating speed reduction of the indoor fan on the heating effect, and is favorable for guaranteeing the heating effect of the air conditioner. The application further discloses a cold-blast prevention control device for a cabinet air conditioner, a cabinet air conditioner and a storage medium.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, for example to a method, device, cabinet unit, and storage medium for controlling cold air in a cabinet air conditioner. Background Technology

[0002] Currently, air conditioners have a cold air prevention control function when operating in heating mode. By activating the cold air prevention control, stable and reliable operation in cooling mode can be achieved.

[0003] The related technology discloses a method for controlling cold air in an air conditioner, including detecting the coil temperature of an indoor microchannel heat exchanger when the air conditioner is running in heating mode; when the coil temperature is lower than a first temperature threshold for a preset duration, controlling the indoor fan speed to switch from high to low; and when the coil temperature is lower than a second temperature threshold, controlling the indoor fan speed to switch from low to stop. The first temperature threshold is greater than the second temperature threshold.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] The related technology employs a control method that increases the coil temperature of the microchannel heat exchanger by reducing the indoor fan speed. Once the indoor fan speed is reduced to a low setting, if the coil temperature falls below a second temperature threshold, the indoor fan automatically stops operating. Thus, the reduced indoor fan speed leads to a decrease in the heat exchange efficiency of the microchannel heat exchanger, resulting in a slower rate of temperature increase in the indoor environment and a poorer heating effect.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a method, device, cabinet unit, and storage medium for controlling cold air in a cabinet air conditioner, which reduces the adverse effects of reduced indoor fan speed on heating performance in air conditioners equipped with microchannel heat exchangers, thereby helping to ensure the heating performance of the air conditioner.

[0009] In some embodiments, the indoor unit of the cabinet air conditioner includes a microchannel heat exchanger and an indoor fan. The microchannel heat exchanger is equipped with a temperature sensor for detecting the coil temperature value of the microchannel heat exchanger. The method includes: acquiring the coil temperature value of the microchannel heat exchanger when the cabinet air conditioner is operating in heating mode; and performing valve opening compensation processing on the electronic expansion valve according to the updated coil temperature value, thereby increasing the coil temperature value of the microchannel heat exchanger by increasing the refrigerant flow rate of the microchannel heat exchanger to maintain the rotational speed of the indoor fan.

[0010] In some embodiments, the apparatus includes a processor and a memory storing program instructions, wherein the processor is configured to execute the above-described method for controlling cold air in a cabinet air conditioner when the program instructions are executed.

[0011] In some embodiments, the cabinet unit includes: an indoor unit, including a microchannel heat exchanger and an indoor fan; a temperature sensor installed on the microchannel heat exchanger for detecting the coil temperature value of the microchannel heat exchanger; and an anti-cold air control device for the cabinet unit as described above, which is installed on the indoor unit.

[0012] In some embodiments, the storage medium stores program instructions that, when executed, perform the anti-cold air control method for the cabinet air conditioner as described above.

[0013] The cold air prevention control method, device, cabinet, and storage medium for cabinet air conditioners provided in this disclosure can achieve the following technical effects:

[0014] This embodiment of the invention increases the refrigerant flow rate of the microchannel heat exchanger, thereby raising the coil temperature while maintaining a constant indoor fan speed. With the microchannel heat exchanger coil temperature rising and the indoor fan speed remaining constant, the indoor temperature rise rate is greater than zero, and the heat exchange efficiency of the microchannel heat exchanger can be maintained or even increased. Therefore, this embodiment of the invention effectively reduces the adverse effects of reduced indoor fan speed on heating performance in cabinet air conditioners equipped with microchannel heat exchangers, thus ensuring the heating effect of the cabinet air conditioner.

[0015] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0017] Figure 1 This is a schematic diagram of a method for controlling cold air in a cabinet air conditioner according to an embodiment of this disclosure;

[0018] Figure 2 This is a schematic diagram of another method for controlling cold air in a cabinet air conditioner provided in an embodiment of this disclosure;

[0019] Figure 3 This is a schematic diagram of another method for controlling cold air in a cabinet air conditioner provided in an embodiment of this disclosure;

[0020] Figure 4 This is a schematic diagram of another method for controlling cold air in a cabinet air conditioner provided in an embodiment of this disclosure;

[0021] Figure 5 This is a schematic diagram of another method for controlling cold air in a cabinet air conditioner provided in an embodiment of this disclosure;

[0022] Figure 6 This is an application illustration of an embodiment of the present disclosure;

[0023] Figure 7 This is a schematic diagram of a cold air control device for a cabinet air conditioner provided in an embodiment of this disclosure;

[0024] Figure 8 This is a schematic diagram of a cabinet machine provided in an embodiment of this disclosure. Detailed Implementation

[0025] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0026] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0027] Unless otherwise stated, the term "multiple" means two or more.

[0028] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0029] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0030] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0031] This disclosure provides a cabinet-style air conditioner, including an indoor unit. The indoor unit includes a microchannel heat exchanger and an indoor fan. The microchannel heat exchanger is equipped with a temperature sensor for detecting the coil temperature of the microchannel heat exchanger. Optionally, the temperature sensor is installed in the middle of the microchannel heat exchanger.

[0032] Optionally, the microchannel heat exchanger includes flat tubes, fins, and manifolds. The flat tubes comprise multiple parallel flow channels with identical cross-sectional areas. When air generated by a fan acts on the flat tubes and fins, the refrigerant flowing through the flow channels of the flat tubes exchanges heat with the air, and the refrigerant evaporates or condenses within the multiple flow channels. Specifically, when the microchannel heat exchanger operates as a condenser, the refrigerant is cooled within the multiple flow channels. When the microchannel heat exchanger operates as an evaporator, the refrigerant is evaporated within the multiple flow channels.

[0033] Based on the above cabinet structure, combined with Figure 1 As shown in the embodiments of this disclosure, a method for controlling cold air in a cabinet air conditioner is provided, including:

[0034] S01, the processor obtains the coil temperature value of the microchannel heat exchanger when the cabinet unit is running in heating mode.

[0035] In this step, the cabinet unit operates in heating mode, including: the cabinet unit is in a stable operation phase in heating mode.

[0036] S02, the processor performs valve opening compensation processing on the electronic expansion valve according to the updated coil temperature value, and increases the coil temperature value of the microchannel heat exchanger by increasing the refrigerant flow of the microchannel heat exchanger in order to maintain the speed value of the indoor fan.

[0037] The cold air control method for cabinet air conditioners provided in this disclosure continuously monitors the coil temperature of the microchannel heat exchanger when the cabinet air conditioner is running in heating mode. Based on the updated coil temperature, the electronic expansion valve is opened to compensate for the increase in refrigerant flow within the microchannel heat exchanger, thereby raising the coil temperature. Thus, by increasing the refrigerant flow in the microchannel heat exchanger, this disclosure increases the coil temperature while maintaining a constant indoor fan speed. With the microchannel heat exchanger coil temperature rising and the indoor fan speed remaining constant, the indoor temperature rise rate is greater than zero, and the heat exchange efficiency of the microchannel heat exchanger is maintained or even increased. Therefore, this disclosure effectively reduces the adverse effects of reduced indoor fan speed on heating performance in cabinet air conditioners equipped with microchannel heat exchangers, thus ensuring the heating effect of the cabinet air conditioner.

[0038] Furthermore, this embodiment increases the coil temperature of the microchannel heat exchanger by increasing the refrigerant flow rate, thus keeping the indoor fan speed constant. The air outlet distance of the indoor fan also remains constant, reducing the impact on user experience caused by a shorter outlet distance.

[0039] Furthermore, since the flat tube is composed of multiple parallel flow channels with a straight up-down structure, the refrigerant flow rate in the microchannel heat exchanger can be rapidly increased by performing valve opening compensation on the electronic expansion valve, thereby achieving a rapid increase in the coil temperature of the microchannel heat exchanger.

[0040] It should be noted that the processor is the executing entity for the anti-cold air control method of the cabinet air conditioner. The processor can be configured in the indoor unit, in a server communicating with the indoor unit, or in a terminal device communicating with the indoor unit. This disclosure does not impose specific limitations on this aspect.

[0041] Optionally, combined Figure 2 As shown, the processor performs valve opening compensation processing on the electronic expansion valve based on the updated coil temperature value, increasing the coil temperature value of the microchannel heat exchanger by increasing the refrigerant flow rate, including:

[0042] S11, the processor obtains the coil temperature change within a first preset time period. In this step, the first preset time period can be set according to actual heating requirements. As an example, the first preset time period is greater than zero and less than or equal to 10 seconds.

[0043] S12, when the temperature change of the coil is less than zero, the processor determines the opening compensation amount of the electronic expansion valve based on the temperature change of the coil.

[0044] S13, the processor performs valve opening compensation processing on the electronic expansion valve according to the opening compensation amount, and increases the coil temperature of the microchannel heat exchanger by increasing the refrigerant flow rate of the microchannel heat exchanger.

[0045] Among them, the opening compensation amount is positively correlated with the change in coil temperature.

[0046] Thus, this embodiment of the present disclosure obtains the coil temperature change within a first preset time period. When the coil temperature change is less than zero, it indicates that the coil temperature is decreasing. If the anti-cold air control method disclosed in related technologies is used, the indoor fan speed is reduced, resulting in a decrease in the heat exchange efficiency of the microchannel heat exchanger, a slower rate of temperature rise in the indoor environment, and a poorer heating effect. To avoid reducing the indoor fan speed, this embodiment of the present disclosure determines the opening compensation amount of the electronic expansion valve based on the coil temperature change. The opening compensation amount is positively correlated with the coil temperature change; that is, the greater the decrease in coil temperature, the greater the opening compensation amount. In this way, this embodiment of the present disclosure rapidly increases the refrigerant flow rate of the microchannel heat exchanger by performing valve opening compensation, thereby rapidly increasing the coil temperature of the microchannel heat exchanger. This eliminates the need to reduce the indoor fan speed as the coil temperature decreases, ultimately achieving the goal of maintaining the indoor fan speed.

[0047] Optionally, the processor determines the opening compensation amount of the electronic expansion valve based on the change in coil temperature, including:

[0048] The processor calculates ΔFV = k·ΔT t .

[0049] Where ΔFV represents the opening compensation amount of the electronic expansion valve, and ΔT t This represents the change in coil temperature within the first preset time period t, where k represents the compensation coefficient and 1 <k≤5。

[0050] Thus, the valve opening compensation amount is directly proportional to the change in coil temperature. This proportional relationship allows for rapid increases in refrigerant flow rate in the microchannel heat exchanger through valve opening compensation, leading to a rapid rise in the coil temperature and helping to maintain the indoor fan speed.

[0051] Optionally, k can be 1.5, 2, or 3. It is understood that k can also be any value in the range (1,5), and this disclosure does not specifically limit this.

[0052] Combination Figure 3 As shown in the embodiments of this disclosure, another method for controlling cold air in a cabinet air conditioner is provided, including:

[0053] S21, the processor obtains the coil temperature value of the microchannel heat exchanger when the cabinet unit is running in heating mode.

[0054] S22, the processor performs valve opening compensation processing on the electronic expansion valve according to the updated coil temperature value, and increases the coil temperature value of the microchannel heat exchanger by increasing the refrigerant flow of the microchannel heat exchanger in order to maintain the speed value of the indoor fan.

[0055] S23, the processor obtains the compressor's exhaust temperature value.

[0056] S24, when the exhaust temperature is lower than the exhaust temperature threshold, the processor controls the compressor to perform a frequency increase operation. The exhaust temperature threshold refers to the critical exhaust temperature value that triggers the compressor to perform the frequency increase operation.

[0057] The cold air control method for cabinet air conditioners provided in this disclosure may cause a decrease in the compressor's exhaust temperature during the valve opening compensation process, resulting in excessively low refrigerant temperature entering the microchannel heat exchanger. To overcome this problem, when the exhaust temperature is lower than the exhaust temperature threshold, this disclosure controls the compressor to perform frequency increase operation to ensure that the refrigerant temperature and flow rate entering the microchannel heat exchanger meet the corresponding requirements.

[0058] Optionally, when the exhaust temperature is lower than the exhaust temperature threshold, the processor controls the compressor to perform a frequency increase operation, including:

[0059] The processor obtains the compressor's up-frequency limit threshold and current frequency.

[0060] The processor controls the compressor frequency to increase from the current frequency to the upper frequency limit threshold.

[0061] This avoids the compressor's frequency exceeding the upper limit threshold, which could adversely affect the stability of the cabinet unit's heating operation.

[0062] Optionally, the processor controls the compressor frequency to increase from the current frequency to the upper frequency limit threshold, including:

[0063] The processor increases the compressor frequency according to a preset frequency change rate.

[0064] Thus, this embodiment of the invention can increase the compressor's exhaust temperature by fine-tuning the compressor frequency, ensuring that the refrigerant temperature and flow rate entering the microchannel heat exchanger meet the corresponding requirements. This avoids excessively rapid frequency adjustment, which could affect the heating performance of the cabinet unit.

[0065] Combination Figure 4 As shown in the embodiments of this disclosure, another method for controlling cold air in a cabinet air conditioner is provided, including:

[0066] S31, the processor obtains the coil temperature value of the microchannel heat exchanger when the cabinet unit is running in heating mode.

[0067] S32, the processor performs valve opening compensation processing on the electronic expansion valve according to the updated coil temperature value, and increases the coil temperature value of the microchannel heat exchanger by increasing the refrigerant flow of the microchannel heat exchanger in order to maintain the speed value of the indoor fan.

[0068] S33, the processor obtains the compressor's exhaust temperature value.

[0069] S34, when the exhaust temperature is below the exhaust temperature threshold, the processor controls the compressor to perform a frequency increase operation. Alternatively,

[0070] S35, the processor obtains a new coil temperature value again if the exhaust temperature value is greater than or equal to the exhaust temperature threshold.

[0071] S36, if the new coil temperature value is greater than or equal to the first temperature threshold b and less than or equal to the second temperature threshold a, the processor will again perform valve opening compensation processing on the electronic expansion valve according to the new update of the coil temperature value.

[0072] The exhaust temperature threshold represents the critical exhaust temperature value that triggers the compressor to perform frequency increase operation. The first temperature threshold b is less than the second temperature threshold a.

[0073] The anti-cold air control method for cabinet air conditioners provided in this disclosure involves obtaining the compressor's exhaust temperature value after performing valve opening compensation processing on the electronic expansion valve. If the exhaust temperature value is greater than or equal to the exhaust temperature threshold, it indicates that the current exhaust temperature value has not yet dropped to the exhaust critical temperature value that triggers the compressor to perform frequency increase operation, and therefore, there is no need to perform the compressor frequency increase operation. At this time, this disclosure obtains a new coil temperature value again. When the new coil temperature value is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, it indicates that after the valve opening compensation processing, the coil temperature value has increased, but the increase is not significant. Therefore, valve opening compensation processing is performed again. In this way, this disclosure can perform valve opening compensation processing on the electronic expansion valve in real time according to the matching situation of the coil temperature value and different temperature thresholds, thereby quickly increasing the coil temperature value of the microchannel heat exchanger, so that the indoor fan speed value does not need to be reduced as the coil temperature value decreases, ultimately achieving the purpose of maintaining the indoor fan speed value.

[0074] Optionally, after the processor obtains a new coil temperature value, it also includes:

[0075] When the new coil temperature is lower than the first temperature threshold b, the processor adjusts the speed of the indoor fan to achieve anti-cold air control by adjusting the speed.

[0076] When the new coil temperature exceeds the second temperature threshold a, the processor stops the valve opening compensation process for the electronic expansion valve.

[0077] Thus, in this embodiment, when the new coil temperature is less than the first temperature threshold, it indicates that the opening compensation process of the electronic expansion valve has not significantly increased the coil temperature of the microchannel heat exchanger. Therefore, this embodiment adjusts the indoor fan speed to increase the coil temperature of the microchannel heat exchanger, achieving cold air prevention control. When the new coil temperature is greater than the second temperature threshold, it indicates that the opening compensation process of the electronic expansion valve has effectively increased the coil temperature of the microchannel heat exchanger. There is no need to continue the opening compensation process. Therefore, the opening compensation operation of the electronic expansion valve is stopped. Thus, after performing the electronic expansion valve opening compensation process, this embodiment obtains a new coil temperature value again and determines the increase in coil temperature. Then, based on the increase in coil temperature, the cold air prevention control strategy is adjusted in real time to ensure the heating effect of the cabinet unit.

[0078] Optionally, the processor adjusts the speed of the indoor fan, including:

[0079] If the coil temperature remains below the first temperature threshold b for a second preset duration, the processor controls the indoor fan to reduce its speed.

[0080] If the coil temperature remains below the third temperature threshold c for a third preset duration, the processor will control the indoor fan to stop operating.

[0081] Among them, the first temperature threshold b is greater than the third temperature threshold c.

[0082] Thus, in this embodiment of the present disclosure, when the coil temperature remains below the first temperature threshold for a second preset time period, it indicates that the coil temperature is too low. At this time, reducing the indoor fan speed can raise the coil temperature. Conversely, when the coil temperature remains below the third temperature threshold for a third preset time period, it indicates that the coil temperature is extremely low. At this time, stopping the indoor fan can raise the coil temperature. This is beneficial for raising the coil temperature of the microchannel heat exchanger and ensuring heating performance.

[0083] Optionally, both the second and third preset durations can be set according to actual heating needs. As an example, the second preset duration is greater than zero and less than or equal to 10 seconds. The third preset duration is greater than zero and less than or equal to 10 seconds.

[0084] Optionally, the first temperature threshold b is 24°C. The second temperature threshold a is 30°C. The third temperature threshold c is 19°C. The above temperature thresholds are examples, and a, b, and c can also be other values. This disclosure does not specifically limit these values.

[0085] Combination Figure 5 As shown in the embodiments of this disclosure, another method for controlling cold air in a cabinet air conditioner is provided, including:

[0086] S41, the processor obtains the coil temperature value of the microchannel heat exchanger when the cabinet unit is running in heating mode.

[0087] S42, the processor obtains an update on the coil temperature value when the coil temperature value is lower than the second temperature threshold.

[0088] S43, the processor performs valve opening compensation processing on the electronic expansion valve based on the updated coil temperature value, and increases the coil temperature value of the microchannel heat exchanger by increasing the refrigerant flow of the microchannel heat exchanger in order to maintain the speed value of the indoor fan.

[0089] The cold air control method for cabinet air conditioners provided in this disclosure indicates that when the coil temperature is lower than a second temperature threshold, it signifies a low coil temperature, which is detrimental to the operation of the cabinet air conditioner's heating mode. In this case, the updated coil temperature is obtained, and the electronic expansion valve is opened for compensation based on the updated information. Thus, for cabinet air conditioners equipped with microchannel heat exchangers, this disclosure effectively reduces the adverse effects of reduced indoor fan speed on heating performance by promptly monitoring the coil temperature and performing valve opening compensation when the coil temperature is low, thereby ensuring the heating effect of the cabinet air conditioner.

[0090] In practical applications, such as Figure 6 As shown, the method for controlling cold air in cabinet air conditioners specifically involves the following steps:

[0091] S101: The processor obtains the coil temperature value of the microchannel heat exchanger when the cabinet unit is running in heating mode. The coil temperature value is 29℃.

[0092] S102: The processor updates the coil temperature value when the coil temperature is below a second temperature threshold. The second temperature threshold is 30°C.

[0093] S103: The processor obtains the coil temperature change ΔT within a first preset time period. t The coil temperature decreases from 29°C to 28°C within the first preset time period, i.e., ΔT. t =1℃.

[0094] S104, the processor is in ΔT t When it is less than zero, according to ΔFV=3ΔT t Determine the opening compensation amount ΔFV of the electronic expansion valve. ΔFV = 3 steps.

[0095] S105: The processor performs opening compensation on the electronic expansion valve based on ΔFV. The current opening value of the electronic expansion valve is 120 steps, and after opening compensation, the updated opening value is 123 steps.

[0096] S106: The processor obtains the compressor's exhaust temperature value.

[0097] S107, when the exhaust temperature is lower than the exhaust temperature threshold, the processor controls the compressor to perform frequency increase operation.

[0098] S108, if the exhaust temperature value is greater than or equal to the exhaust temperature threshold, the processor obtains a new coil temperature value again and executes S109 to S111.

[0099] S109, if the new coil temperature value is greater than or equal to the first temperature threshold b and less than or equal to the second temperature threshold a, the processor will again perform valve opening compensation processing on the electronic expansion valve according to the new update of the coil temperature value.

[0100] S110: If the processor executes S112 or S113 when the new coil temperature is less than the first temperature threshold b.

[0101] S111: When the new coil temperature value is greater than the second temperature threshold a, the processor stops the valve opening compensation process for the electronic expansion valve.

[0102] S112: If the coil temperature value remains below the first temperature threshold b for a second preset time period, the processor controls the indoor fan to reduce its speed.

[0103] S113: If the coil temperature remains below the third temperature threshold c for a third preset duration, the processor will control the indoor fan to stop operating.

[0104] Combination Figure 7 As shown, this disclosure provides an anti-cold air control device 300 for a cabinet air conditioner, including a processor 400 and a memory 401. Optionally, the device may further include a communication interface 402 and a bus 403. The processor 400, communication interface 402, and memory 401 can communicate with each other via the bus 403. The communication interface 402 can be used for information transmission. The processor 400 can call logical instructions in the memory 401 to execute the anti-cold air control method for the cabinet air conditioner described in the above embodiment.

[0105] Furthermore, the logic instructions in the aforementioned memory 401 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0106] The memory 401, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 400 executes functional applications and data processing by running the program instructions / modules stored in the memory 401, thereby implementing the anti-cold air control method for the cabinet air conditioner in the above embodiments.

[0107] The memory 401 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 401 may include high-speed random access memory and may also include non-volatile memory.

[0108] Combination Figure 8 As shown, this disclosure provides a cabinet air conditioner 600, including: an indoor unit, a temperature sensor, and the aforementioned anti-cold air control device 300 for the cabinet air conditioner. The indoor unit includes a microchannel heat exchanger and an indoor fan. The temperature sensor is installed on the microchannel heat exchanger and is used to detect the coil temperature value of the microchannel heat exchanger. The anti-cold air control device 300 for the cabinet air conditioner is installed on the indoor unit. The installation relationship described herein is not limited to placement inside the product, but also includes installation connections with other components of the product, including but not limited to physical connections, electrical connections, or signal transmission connections. Those skilled in the art will understand that the anti-cold air control device 300 for the cabinet air conditioner can be adapted to feasible product bodies to achieve other feasible embodiments.

[0109] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to execute the above-described anti-cold air control method for cabinet units.

[0110] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0111] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.

[0112] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0113] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0114] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. 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 units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0115] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling cold air in a cabinet air conditioner, characterized in that, The indoor unit of the cabinet air conditioner includes a microchannel heat exchanger and an indoor fan. The microchannel heat exchanger is equipped with a temperature sensor for detecting the coil temperature of the microchannel heat exchanger. The method includes: When the cabinet air conditioner is running in heating mode, obtain the coil temperature value of the microchannel heat exchanger; Based on the updated coil temperature values, the electronic expansion valve is opened to compensate for the increase in refrigerant flow to the microchannel heat exchanger, thereby increasing the coil temperature and maintaining the indoor fan speed. The step of performing valve opening compensation processing on the electronic expansion valve based on the updated coil temperature value, and increasing the coil temperature value of the microchannel heat exchanger by increasing the refrigerant flow rate of the microchannel heat exchanger, includes: Obtain the change in coil temperature within a first preset time period; When the temperature change of the coil is less than zero, the opening compensation amount of the electronic expansion valve is determined based on the temperature change of the coil. The electronic expansion valve is compensated for opening according to the opening compensation amount, and the coil temperature of the microchannel heat exchanger is increased by increasing the refrigerant flow rate of the microchannel heat exchanger. Among them, the opening compensation amount is positively correlated with the change in coil temperature.

2. The method according to claim 1, characterized in that, The determination of the opening compensation amount of the electronic expansion valve based on the temperature change of the coil includes: calculate ; in, This indicates the opening compensation amount of the electronic expansion valve. This represents the change in coil temperature within the first preset time period t. Represents the compensation coefficient and .

3. The method according to claim 1 or 2, characterized in that, The process of adjusting the electronic expansion valve opening compensation based on the updated coil temperature, and increasing the coil temperature of the microchannel heat exchanger by increasing the refrigerant flow rate, further includes: Obtain the compressor's exhaust temperature value; When the exhaust temperature is lower than the exhaust temperature threshold, the compressor is controlled to perform frequency increase operation.

4. The method according to claim 3, characterized in that, Also includes: If the exhaust temperature value is greater than or equal to the exhaust temperature threshold, obtain a new coil temperature value again. If the new coil temperature value is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, the electronic expansion valve will be opened again for compensation based on the updated coil temperature value.

5. The method according to claim 4, characterized in that, After obtaining the new coil temperature value again, the process also includes: If the new coil temperature is lower than the first temperature threshold, adjust the indoor fan speed to control cold air flow by adjusting the speed; or, If the new coil temperature exceeds the second temperature threshold, stop the opening compensation process for the electronic expansion valve.

6. The method according to claim 5, characterized in that, The adjustment of the indoor fan speed includes: If the coil temperature remains below a second temperature threshold for a second preset duration, the indoor fan speed will be reduced; or... If the coil temperature remains below the third temperature threshold for a third preset time period, the indoor fan will be stopped. The second temperature threshold is greater than the third temperature threshold.

7. The method according to claim 1 or 2, characterized in that, After obtaining the coil temperature value of the microchannel heat exchanger, the method further includes: When the coil temperature is lower than the second temperature threshold, the coil temperature is updated.

8. A cold air control device for a cabinet air conditioner, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute, when running the program instructions, the anti-cold air control method for cabinet air conditioners as described in any one of claims 1 to 7.

9. A cabinet-style air conditioner, characterized in that, include: Indoor unit, including microchannel heat exchanger and indoor fan; A temperature sensor, installed in the microchannel heat exchanger, is used to detect the coil temperature of the microchannel heat exchanger. The anti-cold air control device for cabinet air conditioners as described in claim 8 is installed in the indoor unit.

10. A storage medium storing program instructions, characterized in that, When the program instructions are executed, they perform the anti-cold air control method for cabinet units as described in any one of claims 1 to 7.

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