CN110470011A - Control method and device, air-conditioning for air-conditioner defrosting - Google Patents

Abstract

The present application relates to the technical field of air conditioner defrosting, and discloses a control method for air conditioner defrosting. The control method includes: when the air conditioner needs to be defrosted, controlling the compressor of the air conditioner to perform a frequency reduction operation; obtaining the outdoor coil temperature of the outdoor heat exchanger and the refrigerant outlet temperature of the outdoor heat exchanger; When the temperature and the refrigerant outlet temperature meet the defrosting exit conditions, the control stops the frequency reduction operation of the compressor. Using the two parameters of the coil temperature of the outdoor heat exchanger and the refrigerant outlet temperature to comprehensively judge the timing of the air conditioner exiting defrosting, it can effectively improve the control accuracy of the air conditioner exiting defrosting; and by reducing the frequency of the compressor operation Reduce the heat exchange between the outdoor heat exchanger and the outdoor environment, and improve the frosting condition of the outdoor heat exchanger, so as to reduce the adverse effect of frost condensation on the heating performance of the air conditioner itself. The application also discloses a control device for defrosting an air conditioner and an air conditioner.

Description

Control method and device for air conditioner defrosting, air conditioner

technical field

The present application relates to the technical field of air conditioner defrosting, for example, to a control method and device for air conditioner defrosting, and an air conditioner.

Background technique

At present, most of the mainstream models of air conditioners have the heat exchange function of cooling and heating dual-mode. Here, users generally adjust the air conditioner to the heating mode to use the air conditioner in low temperature areas or under the climatic conditions with heavy wind and snow. Raise the temperature of the indoor environment; during the heating process of the air conditioner, the outdoor heat exchanger of the outdoor unit acts as an evaporator that absorbs heat from the outdoor environment, and is affected by the temperature and humidity of the outdoor environment. It is easy to condense more frost on the heater, and when the combined frost reaches a certain thickness, the heating capacity of the air conditioner will become lower and lower. Therefore, in order to ensure the heating effect and avoid excessive frost condensation, it is necessary to Defrost the outdoor heat exchanger.

Here, there are mainly the following ways to defrost the outdoor heat exchanger: one is reverse cycle defrosting. When the air conditioner performs reverse cycle defrosting, the high-temperature refrigerant discharged from the compressor first flows through the outdoor heat exchanger to utilize the refrigerant. The heat melts the frost; the second is to add an electric heating device to the refrigerant pipeline of the air conditioner, and the electric heating device is used to heat the refrigerant flowing into the outdoor heat exchanger, and then use the heat of the refrigerant to melt the frost condensed on the outdoor heat exchanger; the third is to adjust the compressor, The operating parameters of air-conditioning components such as electronic expansion valves can change the temperature and pressure state of the refrigerant in the refrigerant pipeline, so that it can also play the role of defrosting the outdoor heat exchanger.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

Since the above defrosting methods for the outdoor heat exchanger will more or less affect the normal heating performance of the air conditioner, the air conditioner will make a judgment before exiting the defrosting, and then control whether the air conditioner exits the defrosting according to the judgment result. In the related art, it is generally judged whether to exit the defrost by comparing the numerical value between the outdoor ambient temperature and the frost point temperature. Since the frost condensation of the outdoor heat exchanger will be affected by various factors such as the outdoor environment and its own operating state, the above judgment method of whether to exit the defrost mode is too rough, which is easy to cause the air conditioner to exit the defrost mode in advance and cause defrost. Incomplete, or continuously running the defrost mode after the defrost is completed, which affects the normal heating performance of the air conditioner.

SUMMARY OF THE INVENTION

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended to be an extensive review, nor to identify key/critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

The embodiments of the present disclosure provide a control method and device for defrosting an air conditioner, and an air conditioner, so as to solve the problem that the method of judging whether to exit the defrost mode in the related art is too rough, and it is easy to cause the air conditioner to exit the defrost mode in advance and cause the defrost to fail. Complete, or a technical problem that affects the normal heating performance of the air conditioner by continuously running the defrost mode after the defrost is completed.

In some embodiments, the control method for air conditioner defrosting includes:

When the air conditioner needs to be defrosted, the compressor of the air conditioner is controlled to perform a frequency reduction operation;

Obtain the outdoor coil temperature of the outdoor heat exchanger and the refrigerant outlet temperature of the outdoor heat exchanger;

When the outdoor coil temperature and the refrigerant outlet temperature meet the defrosting exit conditions, the control stops the frequency reduction operation of the compressor.

In some embodiments, the control device for defrosting an air conditioner includes a processor and a memory storing program instructions, and the processor is configured to execute the above control method for defrosting an air conditioner when executing the program instructions.

In some embodiments, the air conditioner includes:

The refrigerant circulation loop is composed of an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a compressor connected by a refrigerant pipeline;

The above control device for air conditioner defrosting is electrically connected to the compressor.

The control method and device for defrosting an air conditioner, and the air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

During the defrosting operation of the air conditioner, the two parameters of the coil temperature of the outdoor heat exchanger and the temperature of the refrigerant outlet are used to comprehensively judge the timing of the air conditioner to exit the defrost, which can effectively improve the control accuracy of the air conditioner to exit the defrost. Avoid the air conditioner exiting the defrost mode in advance and cause incomplete defrost, or continue to run the defrost mode after the defrost is completed and affect the normal heating performance of the air conditioner; and reduce the frequency of the outdoor heat exchanger by reducing the frequency of the compressor. The heat exchange of the outdoor environment, thereby reducing the adverse effects of temperature factors such as the low temperature of the outer surface of the outdoor heat exchanger caused by a large amount of heat absorption, thereby improving the frosting condition of the outdoor heat exchanger and reducing the effect of frost condensation on the air conditioner itself. Adverse effects on heating performance.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by the accompanying drawings, which are not intended to limit the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings do not constitute a limitation of scale, and in which:

1 is a schematic flowchart of a control method for air conditioner defrosting provided by an embodiment of the present disclosure;

2 is a schematic flowchart of a control method for air conditioner defrosting provided by an embodiment of the present disclosure;

3 is a schematic structural diagram of a control device for air conditioner defrosting provided by an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a control device for defrosting an air conditioner provided by an embodiment of the present disclosure.

Detailed ways

In order to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are for reference only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, numerous details are provided to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.

FIG. 1 is a schematic flowchart of a control method for defrosting an air conditioner provided by an embodiment of the present disclosure.

An embodiment of the present disclosure provides a control method for defrosting an air conditioner, as shown in FIG. 1 , including the following steps:

S101: When the air conditioner needs to be defrosted, control to perform a frequency reduction operation on the compressor of the air conditioner.

In the embodiment, when the outdoor heat exchanger of the outdoor unit of the air conditioner has a frosting problem, the outdoor environment is mostly in a harsh working condition with low temperature and high humidity. At this time, the user generally sets the air conditioner to operate in the heating mode , in order to use the air conditioner to heat up the indoor environment. Therefore, the control method for defrosting the air conditioner provided by the embodiments of the present disclosure is a control flow that is enabled when the air conditioner operates in the heating mode.

Optionally, it is determined whether the air conditioner needs to be defrosted by means of a numerical comparison between the outdoor ambient temperature and the frost point temperature. When the outdoor ambient temperature is lower than the frost point temperature, it is considered that the air conditioner needs to be defrosted; when the outdoor ambient temperature is higher than the frost point temperature, it is considered that the air conditioner does not need to be defrosted.

By reducing the frequency of the compressor, the heat exchange between the outdoor heat exchanger and the outdoor environment is reduced, thereby reducing the adverse effects of temperature factors such as low temperature on the outer surface of the outdoor heat exchanger caused by a large amount of heat absorption, thereby improving the outdoor heat exchanger. To reduce the adverse effect of frost condensation on the heating performance of the air conditioner itself.

S102: Obtain the outdoor coil temperature of the outdoor heat exchanger and the refrigerant outlet temperature of the outdoor heat exchanger.

Optionally, a first temperature sensor is provided at the coil position of the outdoor heat exchanger of the outdoor unit of the air conditioner, and the first temperature sensor can be used to detect the real-time temperature of the coil position. Therefore, the outdoor coil temperature acquired in step S102 may be the real-time temperature of the coil position detected by the first temperature sensor.

The temperature change of the coil position of the outdoor heat exchanger can intuitively reflect the temperature change of the refrigerant pipeline of the outdoor heat exchanger under the influence of the external outdoor ambient temperature and the internal refrigerant temperature. Areas of lines where frosting is a problem. Therefore, the obtained outdoor coil temperature can be used as a reference factor to measure the influence of the inside and outside of the air conditioner on the frosting of the outdoor heat exchanger.

Optionally, a second temperature sensor is provided in the outdoor heat exchanger of the outdoor unit of the air conditioner, and the second temperature sensor can be used to detect the real-time temperature of the refrigerant flowing through the refrigerant outlet pipeline of the outdoor heat exchanger. Therefore, the refrigerant outlet temperature of the outdoor heat exchanger obtained in step S102 may be the real-time temperature of the refrigerant detected by the second temperature sensor. Here, the refrigerant outlet pipeline is the pipeline through which the refrigerant flows out of the outdoor heat exchanger when the air conditioner operates in the heating mode.

The temperature of the refrigerant flowing out of the outdoor heat exchanger can reflect the heat exchange efficiency between the outdoor heat exchanger and the outdoor environment, and the heat exchange efficiency will be affected by the degree of frosting of the outdoor heat exchanger; here, the degree of frosting in the air conditioner When the frost thickness is low and the frost thickness is thin, the effect of the frost on the heat exchange is small, and the refrigerant flowing through the outdoor heat exchanger absorbs more heat; Under the circumstance, frost has a greater impact on heat exchange, and the refrigerant that flows through the outdoor heat exchanger absorbs less heat. Therefore, the obtained refrigerant outlet temperature can be used as a reference factor to measure the frosting degree of the air-conditioning heat exchanger.

S103: In the case that the temperature of the outdoor coil and the temperature of the refrigerant outlet meet the defrosting exit condition, the control stops the frequency reduction operation of the compressor.

When the outdoor coil temperature and the refrigerant outlet temperature meet the defrosting exit conditions, the control stops to adjust the running state of the compressor of the air conditioner, so as to reduce the impact of the compressor's frequency reduction operation on the normal heating performance of the air conditioner.

Optionally, the defrost exit condition is:

T ₁ ≥T ₀₁ , t ₁ ≥ t ₀₁ , T ₂ ≥ T ₀₂ , and t ₂ ≥ t ₀₂

Among them, T ₁ is the outdoor coil temperature of the outdoor heat exchanger, T ₀₁ is the first preset temperature, t ₁ is the duration of T ₁ ≥ T ₀₁ , t ₀₁ is the first preset duration, and T ₂ is the outdoor heat exchange The refrigerant outlet temperature of the heater, T ₀₂ is the second preset temperature, t ₂ is the duration of T ₂ ≧T ₀₂ , and t ₀₂ is the second preset duration.

Optionally, the first preset temperature is a pre-stored correction temperature of the temperature of the outdoor coil after the defrosting of the outdoor heat exchanger is completed and detected during the defrosting test of the air conditioner. After the defrosting of the outdoor heat exchanger is completed, the temperature of the outdoor coil will fluctuate to a certain extent due to the evaporation of frost water. Therefore, the temperature of the outdoor coil after the defrosting of the outdoor heat exchanger detected during the defrosting test of the air conditioner is corrected to improve the accuracy of the defrosting exit condition.

The first preset temperature can be calculated by the following formula:

T ₀₁ =α*T ₀₀₁

Among them, α is the first proportional coefficient, and T ₀₀₁ is the temperature of the outdoor coil detected after the defrosting of the outdoor heat exchanger is completed during the defrosting test of the air conditioner. The value range of α is [1.1-1.3], for example, 1.1, 1.15, 1.2, 1.25, 1.3.

Optionally, the second preset temperature is a pre-stored corrected temperature of the refrigerant outlet temperature detected during the defrosting test of the air conditioner after the defrosting of the outdoor heat exchanger is completed. After the defrosting of the outdoor heat exchanger is completed, the evaporation of frost water condensed on the outdoor heat exchanger will affect the heat exchange efficiency between the outdoor heat exchanger and the outdoor environment, which will lead to the detected refrigerant outlet temperature and actual defrosting. After the end, there is a deviation between the refrigerant outlet temperature when the outdoor heat exchanger is running stably. Therefore, the temperature of the refrigerant outlet liquid detected during the defrosting test of the air conditioner after the defrosting of the outdoor heat exchanger is completed is corrected to improve the accuracy of the defrosting exit condition.

The second preset temperature can be calculated by the following formula:

T ₀₂ =β*T ₀₀₂

Among them, β is the second proportional coefficient, and T ₀₀₂ is the refrigerant outlet temperature detected during the defrosting test of the air conditioner after the defrosting of the outdoor heat exchanger is completed. The value range of β is [1.1-1.4], for example, 1.1, 1.2, 1.3, 1.4.

Optionally, the value range of the first preset duration is [2s, 5s] (s: seconds), for example, 2s, 3s, 4s, 5s; the value range of the second preset duration is [2s, 5s] , for example, 2s, 3s, 4s, 5s.

In the defrosting exit condition, the temperature of the outdoor coil of the outdoor heat exchanger is greater than the first preset temperature and the duration is greater than the first preset time period, which can intuitively reflect that the outer surface of the outdoor heat exchanger is defrosted; The refrigerant outlet temperature is greater than the second preset temperature and the duration is greater than the second preset duration, which can reflect that the heating performance of the outdoor heat exchanger has recovered to at least frost or frost-free conditions. Therefore, the frequency reduction operation of the compressor can be stopped, and the defrosting operation mode of the air conditioner can be exited.

In this embodiment, during the defrosting operation of the air conditioner, the two parameters of the coil temperature of the outdoor heat exchanger and the temperature of the refrigerant outlet are used to comprehensively judge the timing of the air conditioner exiting the defrosting operation, thereby effectively improving the control of the air conditioner exiting the defrosting operation. The control accuracy of the frost can be avoided to avoid the air conditioner exiting the defrost mode in advance and causing incomplete defrost, or, after the defrost is completed, the defrost mode is continuously operated and the normal heating performance of the air conditioner is affected. In addition, by reducing the frequency of the compressor, the heat exchange between the outdoor heat exchanger and the outdoor environment is reduced, thereby reducing the adverse effects of temperature factors such as low temperature on the outer surface of the outdoor heat exchanger caused by a large amount of heat absorption, thereby improving The frost condition of the outdoor heat exchanger can reduce the adverse effect of frost condensation on the heating performance of the air conditioner itself.

FIG. 2 is a schematic flowchart of a control method for air conditioner defrosting provided by an embodiment of the present disclosure.

An embodiment of the present disclosure provides a control method for air conditioner defrosting, as shown in FIG. 2 , including the following steps:

S201: Determine whether the air conditioner needs to be defrosted.

S202: When the air conditioner needs to be defrosted, obtain the indoor coil temperature of the indoor heat exchanger of the air conditioner.

Optionally, a third temperature sensor is provided at the coil position of the indoor heat exchanger of the air conditioner indoor unit, and the third temperature sensor can be used to detect the real-time temperature of the coil position. Therefore, the indoor coil temperature acquired in step S202 may be the real-time temperature of the coil position detected by the third temperature sensor.

The temperature change of the coil position of the indoor heat exchanger is directly affected by the temperature of the refrigerant flowing into the indoor heat exchanger, so the change of the heating capacity of the air conditioner to the indoor environment can be reflected from the side. The heating capacity of the air conditioner will change accordingly, so the indoor coil temperature is a reference factor for the influence of the frost condition of the outdoor unit of the air conditioner on the attenuation of the heating capacity of the air conditioner.

S203: Determine whether the indoor coil temperature is lower than the third preset temperature.

The third preset temperature is the indoor coil temperature when the air conditioner is in heating operation when the air conditioner is frost-free or less frost-free. The temperature of the indoor coil of the indoor heat exchanger of the air conditioner is lower than the third preset temperature, indicating that the air conditioner is affected by the frosting of the outdoor heat exchanger of the air conditioner, and the heating capacity decreases. Therefore, the frequency reduction operation of the compressor is controlled, the heat exchange between the outdoor heat exchanger and the outdoor environment is reduced, and the frosting condition of the outdoor heat exchanger is improved.

S204: In the case that the indoor coil temperature of the indoor heat exchanger of the air conditioner is lower than the third preset temperature, obtain the first target frequency reduction value according to the first temperature difference between the indoor coil temperature and the third preset temperature.

If the first temperature difference is large, it means that the heating capacity of the air conditioner is poor, and the frosting degree of the outdoor heat exchanger of the air conditioner is relatively serious. If the difference is small, it means that the heating capacity is good, and the frosting degree of the outdoor heat exchanger of the air conditioner is light, so the frequency reduction value of the compressor can be appropriately reduced to reduce the influence of the compressor frequency reduction on the normal heating performance of the air conditioner. Therefore, the first target frequency reduction value of the compressor may be determined according to the first temperature difference value.

Optionally, according to the first temperature difference value, a corresponding first frequency reduction value is obtained from the first correlation relationship, and the first frequency reduction value is used as the first target frequency reduction value.

The first association relationship includes one or more corresponding relationships between the first temperature difference value and the first frequency reduction value. For example, Table 1 shows an optional corresponding relationship between the first temperature difference value and the first frequency reduction value (where ΔT ₁ =T ₃ -T ₀₃ , ΔT ₁ is the first temperature difference value, T ₃ is the indoor coil temperature of the indoor heat exchanger, T ₀₃ is the third preset temperature):

Table 1: First Association Relationship

The first temperature difference (unit: °C) The first frequency reduction value (unit: Hz) a₁₁<ΔT₁≤a₁₂ Δh₁₁ a₁₂<ΔT₁≤a₁₃ Δh₁₂ a₁₃<ΔT₁ Δh₁₃

In the first correlation relationship, the first frequency reduction value and the first temperature difference value are positively correlated. That is, the larger the first temperature difference is, the larger the first frequency reduction value is; and the smaller the first temperature difference value is, the smaller the first frequency reduction value is.

S205: Based on the current operating frequency of the compressor, control to perform a frequency reduction operation on the compressor according to the first target frequency reduction value.

After the first target frequency reduction value is obtained, based on the current operating frequency of the compressor, the compressor is controlled to perform a frequency reduction operation according to the first target frequency reduction value, so as to improve the frosting condition of the outdoor heat exchanger.

S206: Obtain the outdoor coil temperature of the outdoor heat exchanger and the refrigerant outlet temperature of the outdoor heat exchanger.

S207: Determine whether the outdoor coil temperature and the refrigerant outlet temperature satisfy the defrosting exit condition.

S208: In the case that the temperature of the outdoor coil and the temperature of the refrigerant outlet meet the defrosting exit conditions, the control stops the frequency reduction operation of the compressor.

In this embodiment, improving the defrosting effect by adjusting the operating state of the compressor of the air conditioner will affect the normal heating performance of the air conditioner. Therefore, when the outdoor coil temperature and the refrigerant outlet temperature meet the defrosting exit conditions, the control will stop and adjust the operating state of the compressor of the air conditioner and return to the operating frequency of the normal heating mode to restore the normal heating performance of the air conditioner.

FIG. 3 is a schematic flowchart of a control method for defrosting an air conditioner provided by an embodiment of the present disclosure.

An embodiment of the present disclosure provides a control method for defrosting an air conditioner, as shown in FIG. 3 , including the following steps:

S301: Determine whether the air conditioner needs to be defrosted.

S302: In the case that the air conditioner needs to be defrosted, obtain a second temperature difference between the outdoor coil temperature of the air conditioner and the outdoor ambient temperature.

Optionally, the outdoor unit of the air conditioner is provided with a fourth temperature sensor, and the fourth temperature sensor can be used to detect the outdoor ambient temperature. Therefore, the outdoor ambient temperature acquired in step S302 may be the real-time temperature detected by the fourth temperature sensor.

S303: Determine whether the second temperature difference is smaller than a preset temperature difference threshold.

Optionally, the value range of the preset temperature difference threshold is [15°C, 25°C] (°C: Celsius), for example, 15°C, 20°C, and 25°C.

The second temperature difference between the outdoor coil temperature and the outdoor ambient temperature is less than the preset temperature difference threshold, indicating that the air conditioner is affected by frost on the outdoor heat exchanger of the air conditioner, and the heating capacity decreases. Therefore, the frequency reduction operation of the compressor is controlled, the heat exchange between the outdoor heat exchanger and the outdoor environment is reduced, and the frosting condition of the outdoor heat exchanger is improved.

S304: In the case that the second temperature difference value is smaller than the preset temperature difference threshold value, obtain a second target frequency reduction value according to the second temperature difference value.

The second temperature difference is small, which means that the heating capacity of the air conditioner is poor, and the degree of frosting of the outdoor heat exchanger of the air conditioner is relatively serious. If the difference is large, it means that the heating capacity is good, and the frosting degree of the outdoor heat exchanger of the air conditioner is light, so the frequency reduction value of the compressor can be appropriately reduced to reduce the influence of the compressor frequency reduction on the normal heating performance of the air conditioner. Therefore, the second target frequency reduction value of the compressor may be determined according to the second temperature difference value.

Optionally, according to the second temperature difference value, a corresponding second frequency reduction value is obtained from the second correlation relationship, and the second frequency reduction value is used as the second target frequency reduction value.

The second association relationship includes one or more corresponding relationships between the second temperature difference values and the second frequency reduction values. For example, Table 2 shows an optional corresponding relationship between the second temperature difference value and the second frequency reduction value (where ΔT ₂ =T ₁ -T ₄ , ΔT ₁ is the second temperature difference value, and T ₄ is the outdoor ambient temperature):

Table 2: Second Association Relationship

The second temperature difference (unit: °C) The second frequency reduction value (unit: Hz) a₂₁<ΔT₂≤a₂₂ Δh₂₁ a₂₂<ΔT₂≤a₂₃ Δh₂₂ a₂₃<ΔT₂ Δh₂₃

In the second correlation relationship, the second frequency reduction value and the second temperature difference value are negatively correlated. That is, the larger the second temperature difference is, the smaller the second frequency reduction value is; and the smaller the second temperature difference value is, the larger the second frequency reduction value is.

S305: Based on the current operating frequency of the compressor, control to perform a frequency reduction operation on the compressor according to the second target frequency reduction value.

After the second target frequency reduction value is obtained, based on the current operating frequency of the compressor, the compressor is controlled to perform a frequency reduction operation according to the second target frequency reduction value, so as to improve the frosting condition of the outdoor heat exchanger.

S306: Obtain the outdoor coil temperature of the outdoor heat exchanger and the refrigerant outlet temperature of the outdoor heat exchanger.

S307: Determine whether the outdoor coil temperature and the refrigerant outlet temperature satisfy the defrosting exit condition.

S308: When the temperature of the outdoor coil and the temperature of the refrigerant outlet meet the defrosting exit conditions, the control stops the frequency reduction operation of the compressor.

In this embodiment, improving the defrosting effect by adjusting the operating frequency of the compressor of the air conditioner will affect the normal heating performance of the air conditioner. Therefore, when the outdoor coil temperature and the refrigerant outlet temperature meet the defrosting exit conditions, the operating frequency of the compressor of the air conditioner is controlled to stop adjusting and return to the operating frequency of the normal heating mode, so as to restore the normal heating performance of the air conditioner.

In the above-mentioned embodiment, since the degree of frost formation of the outdoor heat exchanger has different influences on the heating performance of the air conditioner, and thus has different influences on the temperature changes of the first temperature difference and the second temperature difference, the present application Each of them is provided with a separate relationship, and the air conditioner can select one of the relationships according to actual needs to determine the corresponding frequency reduction value.

Optionally, the specifically selected association relationship can also be determined according to the heating demand of the current user. For example, when the heating demand of the current user is low, the second association relationship is selected. At this time, the outdoor heat exchanger is mainly considered. The effect of frosting on the temperature of the outdoor coil; and when the current user's heating demand is high, the first correlation is selected. At this time, the main consideration is that the temperature of the indoor coil is affected by the temperature of the refrigerant flowing out after heat exchange.

The correlation ratio of the first association relationship is greater than the correlation ratio of the second association relationship. That is, in the case of the temperature difference of the same value, the corresponding first frequency reduction value in the first correlation relationship is greater than the corresponding second frequency reduction value in the second correlation relationship.

Here, the heating demand of the current user may be determined by the target heating temperature set for the air conditioner. For example, the air conditioner presets a heating temperature threshold. When the target heating temperature actually set by the user is lower than the heating temperature threshold, it means that the heating demand of the user is low at this time; and when the target heating temperature actually set by the user is lower than the heating temperature threshold When the heating temperature is greater than or equal to the heating temperature threshold, it indicates that the heating demand of the user is high or low at this time.

In the embodiment of the present disclosure, not only the defrosting operation of the air conditioner for the outdoor heat exchanger can be triggered in time according to the actual frosting condition of the air conditioner, but also the heating of the user can be taken into account when the defrosting operation of the compressor frequency reduction operation is performed. requirements, in order to fully ensure the air conditioner's control requirements for user comfort during the defrosting process.

FIG. 4 is a schematic structural diagram of a control device for defrosting an air conditioner provided by an embodiment of the present disclosure.

An embodiment of the present disclosure provides a control device for defrosting an air conditioner, the structure of which is shown in FIG. 4 and includes:

An embodiment of the present disclosure provides a control device for defrosting an air conditioner, the structure of which is shown in FIG. 4 and includes:

A processor (processor) 40 and a memory (memory) 41 may also include a communication interface (Communication Interface) 42 and a bus 43 . The processor 40 , the communication interface 42 , and the memory 41 can communicate with each other through the bus 43 . The communication interface 42 may be used for information transfer. The processor 40 may call the logic instructions in the memory 41 to execute the control method for air conditioner defrosting in the above-mentioned embodiments.

In addition, the above-mentioned logic instructions in the memory 41 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

As a computer-readable storage medium, the memory 41 can be used to store software programs and computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 40 executes the function application and data processing by running the program instructions/modules stored in the memory 41, that is, to implement the control method for air conditioner defrosting in the above method embodiments.

The memory 41 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 41 may include high-speed random access memory, and may also include non-volatile memory.

Embodiments of the present disclosure provide an air conditioner, including:

The refrigerant circulation loop is composed of an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a compressor connected by a refrigerant pipeline;

The above control device for air conditioner defrosting is electrically connected to the compressor.

In the air conditioner provided by the embodiments of the present disclosure, the two parameters of the coil temperature of the outdoor heat exchanger and the temperature of the refrigerant outlet are used to comprehensively judge the timing of the air conditioner exiting from defrosting, thereby effectively improving the control accuracy of controlling the air conditioner exiting from defrosting; and By reducing the frequency of the compressor, the heat exchange between the outdoor heat exchanger and the outdoor environment is reduced, thereby reducing the adverse effects of temperature factors such as low temperature on the outer surface of the outdoor heat exchanger caused by a large amount of heat absorption, thereby improving the outdoor heat exchanger. Frost condition of the heater.

An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, where the computer-executable instructions are configured to execute the above-mentioned control method for air conditioner defrosting.

Embodiments of the present disclosure provide a computer program product, where the computer program product includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions that, when executed by a computer, cause all The computer executes the above-mentioned control method for air conditioner defrosting.

The above-mentioned computer-readable storage medium may be a transient computer-readable storage medium, and may also be a non-transitory computer-readable storage medium.

The technical solutions of the embodiments of the present disclosure may be embodied in the form of software products, and the computer software products are stored in a storage medium and include one or more instructions to enable a computer device (which may be a personal computer, a server, or a network equipment, etc.) to execute all or part of the steps of the methods described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: U disk, removable hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk, etc. A medium that can store program codes, and can also be a transient storage medium.

The foregoing description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The examples represent only possible variations. Unless expressly required, individual components and functions are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of the disclosed embodiments includes the full scope of the claims, along with all available equivalents of the claims. When used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without changing the meaning of the description, a first element could be termed a second element, and similarly, a second element could be termed a first element, so long as all occurrences of "the first element" were consistently renamed and all occurrences of "the first element" were named consistently The "second element" can be renamed consistently. The first element and the second element are both elements, but may not be the same element. Also, the terms used in this application are used to describe the embodiments only and not to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a" (a), "an" (an) and "the" (the) are intended to include the plural forms as well, unless the context clearly dictates otherwise. . Similarly, the term "and/or" as used in this application is meant to include any and all possible combinations of one or more of the associated listings. Additionally, when used in this application, the term "comprise" and its variations "comprises" and/or including and/or the like refer to stated features, integers, steps, operations, elements, and/or The presence of a component does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groupings of these. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, or device that includes the element. Herein, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, reference may be made to the description of the method section for relevant parts.

Those skilled in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. Skilled artisans may use different methods for implementing the described functionality for each particular application, but such implementations should not be considered beyond the scope of the disclosed embodiments. The skilled person can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units can refer to the corresponding processes in the foregoing method embodiments, and details are not repeated here.

In the embodiments disclosed herein, the disclosed methods and products (including but not limited to apparatuses, devices, etc.) may be implemented in other ways. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units may only be a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be combined Either it can be integrated into another system, or some features can be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. This embodiment may be implemented by selecting some or all of the units according to actual needs. In addition, each functional unit in the embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more functions for implementing the specified logical function(s) executable instructions. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, operations or steps corresponding to different blocks may also occur in different sequences than those disclosed in the descriptions, and sometimes there is no specific relationship between different operations or steps. order. For example, two consecutive operations or steps may, in fact, be performed substantially concurrently, or they may sometimes be performed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented in special purpose hardware-based systems that perform the specified functions or actions, or special purpose hardware implemented in combination with computer instructions.

Claims (10)

1. a kind of control method for air-conditioner defrosting characterized by comprising

In the case where air-conditioning is defrosted, controls and frequency redution operation is carried out to the compressor of the air-conditioning；

The refrigerant of the outdoor coil temperature and the outdoor heat exchanger that obtain the outdoor heat exchanger goes out liquid temperature；

In the case where the outdoor coil temperature and the refrigerant go out liquid temperature and meet defrosting exit criteria, control stops to institute It states compressor and carries out frequency redution operation.

2. control method according to claim 1, which is characterized in that the defrosting exit criteria are as follows:

T₁≥T₀₁, t₁≥t₀₁, T₂≥T₀₂, and t₂≥t₀₂

Wherein, T₁For the outdoor coil temperature of outdoor heat exchanger, T₀₁For the first preset temperature, t₁For T₁≥T₀₁Duration, t₀₁For the first preset duration, T₂Go out liquid temperature, T for the refrigerant of outdoor heat exchanger₀₂For the second preset temperature, t₂For T₂≥T₀₂Hold Continuous duration, t₀₂For the second preset duration.

3. control method according to claim 1 or 2, which is characterized in that control carries out frequency redution operation to the compressor, Include:

In the case where the indoor coil pipe of the indoor heat exchanger of the air-conditioning is less than third preset temperature, control to the pressure Contracting machine carries out frequency redution operation.

4. control method according to claim 3, which is characterized in that control carries out frequency redution operation, packet to the compressor It includes:

First object frequency reducing value is obtained according to the first temperature gap of the indoor coil pipe and the third preset temperature；

Based on the current operation frequency of the compressor, control drops the compressor according to the first object frequency reducing value Frequency operates.

5. control method according to claim 4, which is characterized in that obtain described first according to first temperature gap Target frequency reducing value, comprising:

According to first temperature gap, corresponding first frequency reducing value is obtained from the first incidence relation；

Using the first frequency reducing value as the first object frequency reducing value.

6. control method according to claim 1 or 2, which is characterized in that control carries out frequency redution operation to the compressor, Include:

In the case where the second temperature difference of the outdoor coil temperature and outdoor environment temperature is less than fiducial temperature threshold value, control System carries out frequency redution operation to the compressor.

7. control method according to claim 6, which is characterized in that control carries out frequency redution operation, packet to the compressor It includes:

The second target frequency reducing value is obtained according to the second temperature difference；

Based on the current operation frequency of the compressor, control drops the compressor according to the second target frequency reducing value Frequency operates.

8. control method according to claim 7, which is characterized in that obtain described second according to the second temperature difference Target frequency reducing value, comprising:

According to the second temperature difference, corresponding second frequency reducing value is obtained from the second incidence relation；

Using the second frequency reducing value as the second target frequency reducing value.

9. a kind of control device for air-conditioner defrosting, including processor and the memory for being stored with program instruction, feature exists In the processor is configured to executing as claimed in any one of claims 1 to 8 be used for when executing described program instruction The control method of air-conditioner defrosting.

10. a kind of air-conditioning characterized by comprising

Refrigerant circulation circuit connects structure by refrigerant pipeline by outdoor heat exchanger, indoor heat exchanger, throttling set and compressor At；

The control device as claimed in claim 9 for being used for air-conditioner defrosting, with the compression mechatronics.