Method and apparatus for controlling air conditioner, air conditioner, storage medium

Abstract

The application discloses an air conditioner, comprising: a refrigerant circulation system, comprising a compressor, a first heat exchanger, a second heat exchanger, an electronic expansion valve and a third heat exchanger connected in sequence, the second heat exchanger comprising a refrigerant pipeline and a water pipeline for heat exchange; a water circulation system, comprising a fan disc, an expansion water tank and a water pump connected in parallel in sequence, the outlet of the water pump being connected with the inlet of the water pipeline of the second heat exchanger, and the inlet of the fan disc being connected with the outlet of the water pipeline of the second heat exchanger. The application also discloses a method for controlling the air conditioner, comprising: determining whether the air conditioner is frosted according to the back pressure of the compressor and the surface temperature of the third heat exchanger; and controlling the power of the water pump, the frequency of the compressor and the opening degree of the electronic expansion valve according to whether the air conditioner is frosted. The defrosting heat is increased, the defrosting speed and effect are improved, the occurrence of liquid knock of the compressor is reduced, and the reliability of the compressor and the system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent household appliances, for example to a method and device for controlling an air conditioner, an air conditioner and a storage medium. BACKGROUND

[0002] At present, with the improvement of people's living standards, people have put forward higher and higher requirements for living environment. In order to maintain a comfortable environment temperature, the air conditioner has become an essential device in people's life. However, the air conditioner is prone to frosting phenomenon during operation.

[0003] The related technology discloses a defrosting control method of an air conditioning system. The air conditioning system comprises a refrigerant circuit composed of a compressor, a first heat exchanger, a throttling device and a second heat exchanger connected in sequence. The air conditioning system further comprises a water heat exchange system in heat exchange with the second heat exchanger. The control method comprises the following steps: obtaining a current inlet and outlet water temperature difference of the water heat exchange system according to the second heat exchanger of the air conditioning system being in a heat release state; calculating a current heat exchange energy of the water heat exchanger according to the current inlet and outlet water temperature difference and a water flow of the water heat exchange system; and controlling the first heat exchanger of the air conditioning system to enter a defrosting mode according to the current ratio of the current heat exchange energy to a current operating frequency of the compressor being located outside a threshold range of a preset ratio.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related technology:

[0005] The defrosting method disclosed in the related technology has small defrosting heat, slow defrosting and poor defrosting effect, and the high-temperature gaseous refrigerant entering the compressor without evaporation can cause liquid strike, affecting the reliability of the compressor and even the system.

[0006] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important elements or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0008] The embodiments of the present disclosure provide a method and device for controlling an air conditioner, an air conditioner and a storage medium, so as to increase the defrosting heat, improve the defrosting rate and defrosting effect, without the high-temperature gaseous refrigerant entering the compressor without evaporation, reduce the occurrence of liquid strike of the compressor, and improve the reliability of the compressor and even the system.

[0009] In some embodiments, the air conditioner includes: a refrigerant circulation system comprising a compressor, a first heat exchanger, a second heat exchanger, an electronic expansion valve, and a third heat exchanger connected in sequence, wherein the second heat exchanger includes a refrigerant pipeline and a water pipeline for heat exchange; and a water circulation system comprising a fan coil unit, an expansion tank, and a water pump connected in parallel, wherein the outlet of the water pump is connected to the inlet of the water pipeline of the second heat exchanger, and the inlet of the fan coil unit is connected to the outlet of the water pipeline of the second heat exchanger.

[0010] Optionally, the first heat exchanger includes refrigerant piping and water piping, and the air conditioner also includes a hot water storage tank, the outlet of which is connected to the inlet of the water piping of the first heat exchanger, and the inlet of which is connected to the outlet of the water piping of the first heat exchanger.

[0011] Optionally, the third heat exchanger is a multi-medium heat exchanger.

[0012] Optionally, the pump's head is related to its power and water pressure. Specifically, the pump's power is the product of its head and water pressure. More specifically, at a water pressure of 200 kPa, the pump's head is 20 m.

[0013] Optionally, the fan coil unit includes a first fan coil unit and a second fan coil unit, which are connected in parallel.

[0014] In some embodiments, the method is applied to the air conditioner and includes: determining whether the air conditioner is frosted based on the return gas pressure of the compressor and the surface temperature of the third heat exchanger; and controlling the power of the water pump, and / or the frequency of the compressor and the opening degree of the electronic expansion valve based on whether the air conditioner is frosted.

[0015] Optionally, determining whether the air conditioner is frosted based on the compressor's return gas pressure and the surface temperature of the third heat exchanger includes: determining that the air conditioner is frosted when the saturation temperature corresponding to the compressor's return gas pressure is less than a first temperature threshold and the surface temperature of the third heat exchanger is less than a second temperature threshold.

[0016] Specifically, the first temperature threshold can be -1℃. The second temperature threshold can be 0℃.

[0017] Optionally, depending on whether the air conditioner is frosted, the power of the water pump, and / or the frequency of the compressor and the opening of the electronic expansion valve are controlled, including: adjusting the power of the water pump when the air conditioner is frosted; and adjusting the power of the water pump, the frequency of the compressor and the opening of the electronic expansion valve when the air conditioner is not frosted.

[0018] Optionally, adjusting the power of the water pump includes: adjusting the frequency of the water pump according to the surface temperature of the third heat exchanger so that the surface temperature of the third heat exchanger is within a first temperature range.

[0019] Optionally, adjusting the pump frequency based on the surface temperature of the third heat exchanger includes: increasing the pump power when the surface temperature of the third heat exchanger is in a second temperature range; keeping the pump power constant when the surface temperature of the third heat exchanger is in a first temperature range; and decreasing the pump power when the surface temperature of the third heat exchanger is in a third temperature range. The second temperature range is shorter than the first temperature range, and the first temperature range is shorter than the third temperature range.

[0020] Optionally, the first temperature range can be (0℃, 1℃). The second temperature range can be (-∞, 0℃). The third temperature range can be (1℃, +∞).

[0021] Optionally, adjusting the power of the water pump, the frequency of the compressor, and the opening degree of the electronic expansion valve includes: adjusting the power of the water pump according to the outlet water temperature of the third heat exchanger so that the surface temperature of the third heat exchanger is within a first temperature range; and adjusting the frequency of the compressor and the opening degree of the electronic expansion valve according to the outlet water temperature and the evaporation temperature of the third heat exchanger.

[0022] Optionally, adjusting the pump power based on the outlet water temperature of the third heat exchanger includes: increasing the pump power when the outlet water temperature of the third heat exchanger is in the second temperature range; keeping the pump power constant when the outlet water temperature of the third heat exchanger is in the first temperature range; and decreasing the pump power when the outlet water temperature of the third heat exchanger is in the third temperature range. The second temperature range is shorter than the first temperature range, and the first temperature range is shorter than the third temperature range.

[0023] Optionally, increasing the power of the water pump includes: increasing the power of the water pump according to the power change value, wherein the power of the water pump is within a set power range, and the power change value is the product of the current power of the water pump and a set percentage value. Specifically, the set power range can be [50%, 100%]. The set percentage value can be 1%.

[0024] Optionally, reducing the power of the water pump includes: reducing the power of the water pump by a power change value, wherein the power of the water pump is within a set power range, and the power change value is the product of the current power of the water pump and a set proportional value.

[0025] Optionally, the compressor frequency and the opening degree of the electronic expansion valve are adjusted according to the outlet water temperature and the evaporation temperature of the third heat exchanger, including: determining the absolute value of the temperature difference between the outlet water temperature and the evaporation temperature of the third heat exchanger; and adjusting the compressor frequency and the opening degree of the electronic expansion valve according to the absolute value of the temperature difference.

[0026] Optionally, adjusting the compressor frequency and the opening of the electronic expansion valve according to the absolute value of the temperature difference includes: keeping the compressor frequency and the opening of the electronic expansion valve unchanged when the absolute value of the temperature difference is in the fourth temperature range; and increasing the compressor frequency and the opening of the electronic expansion valve so that the absolute value of the temperature difference is in the fourth temperature range when the absolute value of the temperature difference is not in the fourth temperature range.

[0027] Optionally, the compressor frequency and the opening degree of the electronic expansion valve can be increased, including: increasing the compressor frequency according to the frequency change value and increasing the opening degree of the electronic expansion valve according to the opening degree change value.

[0028] Specifically, the frequency change value can be 1 Hz. The opening change value can be 1 step.

[0029] In some embodiments, the apparatus is applied to the air conditioner and includes: a determining module configured to determine whether the air conditioner is frosted based on the return gas pressure of the compressor and the surface temperature of the third heat exchanger; and a control module configured to control the power of the water pump, and / or the frequency of the compressor and the opening degree of the electronic expansion valve based on whether the air conditioner is frosted.

[0030] In some embodiments, the apparatus includes a processor and a memory storing program instructions, the processor being configured to execute the method for controlling an air conditioner when the program instructions are executed.

[0031] In some embodiments, the air conditioner includes: an air conditioner body; and the device for controlling the air conditioner is installed on the air conditioner body.

[0032] In some embodiments, the storage medium stores program instructions that, when executed, perform the method for controlling an air conditioner.

[0033] The method, apparatus, air conditioner, and storage medium for controlling an air conditioner provided in this disclosure can achieve the following technical effects:

[0034] The refrigerant circulation system has three heat exchangers. The refrigerant circulation system and the water circulation system exchange heat in the second heat exchanger. The heat from the compressor exhaust is provided to the second heat exchanger and then to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, reducing the occurrence of liquid slugging and improving the reliability of the compressor and the entire system. Because the refrigerant circulation system and the water circulation system exchange heat directly in the second heat exchanger, the water circulation system has a large amount of defrosting heat, improving the defrosting rate and effect. It also provides a structural basis for controlling the water pump power and / or the compressor frequency and the opening of the electronic expansion valve based on the compressor's return gas pressure and the surface temperature of the third heat exchanger. Since there is no need to switch the four-way valve to stop the system during defrosting, the energy source for defrosting comes from the compressor and fan power, thus saving energy. This facilitates achieving frost-free air conditioning and improves the user experience.

[0035] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0036] 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:

[0037] Figure 1 This is an air conditioner provided in an embodiment of the present disclosure;

[0038] Figure 2 This is a schematic diagram of a method for controlling an air conditioner provided in an embodiment of this disclosure;

[0039] Figure 3 This is a schematic diagram of another method for controlling an air conditioner provided in an embodiment of this disclosure;

[0040] Figure 4 This is a schematic diagram of another method for controlling an air conditioner provided in an embodiment of this disclosure;

[0041] Figure 5 This is a schematic diagram of a device for controlling an air conditioner provided in an embodiment of this disclosure;

[0042] Figure 6 This is a schematic diagram of another device for controlling an air conditioner provided in an embodiment of this disclosure;

[0043] Figure 7 This is a schematic diagram of an air conditioner provided in an embodiment of this disclosure. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] Unless otherwise stated, the term "multiple" means two or more.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In this embodiment of the disclosure, smart home appliances refer to home appliances formed by introducing microprocessors, sensor technology and network communication technology into home appliances. They have the characteristics of intelligent control, intelligent sensing and intelligent application. The operation of smart home appliances often relies on the application and processing of modern technologies such as the Internet of Things, the Internet and electronic chips. For example, smart home appliances can be connected to electronic devices to enable users to remotely control and manage smart home appliances.

[0051] In the disclosed embodiments, the terminal device refers to an electronic device with wireless connectivity. The terminal device can communicate with the aforementioned smart home appliances via the internet, or directly via Bluetooth, Wi-Fi, or other methods. In some embodiments, the terminal device may be, for example, a mobile device, a computer, or an in-vehicle device built into a hovercraft, or any combination thereof. Mobile devices may include, for example, mobile phones, smart home devices, wearable devices, smart mobile devices, virtual reality devices, or any combination thereof. Wearable devices may include, for example, smartwatches, smart bracelets, pedometers, etc.

[0052] Combination Figure 1 As shown, this disclosure provides an air conditioner, including a refrigerant circulation system and a water circulation system. The refrigerant circulation system includes a compressor 1, a first heat exchanger 2, a second heat exchanger 3, an electronic expansion valve 4, and a third heat exchanger 5 connected in series. The second heat exchanger 3 includes refrigerant piping and water piping for heat exchange. The water circulation system includes a fan coil unit, an expansion tank 7, and a water pump 8 connected in parallel in series. The outlet of the water pump 8 is connected to the inlet of the water piping in the second heat exchanger 3, and the inlet of the fan coil unit is connected to the outlet of the water piping in the second heat exchanger 3.

[0053] The air conditioner provided in this embodiment has a refrigerant circulation system with three heat exchangers. The refrigerant circulation system and the water circulation system exchange heat in the second heat exchanger 3. The heat from the compressor 1's exhaust is supplied to the second heat exchanger 3 and then to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor 1, reducing the occurrence of liquid slugging in the compressor 1 and improving the reliability of the compressor 1 and the entire system. Since the refrigerant circulation system and the water circulation system exchange heat directly in the second heat exchanger 3, the defrosting heat in the water circulation system is large, improving the defrosting rate and effect. It also provides a structural basis for controlling the power of the water pump 8 and / or the frequency of the compressor 1 and the opening degree of the electronic expansion valve 4 based on the return gas pressure of the compressor 1 and the surface temperature of the third heat exchanger 5. Since there is no need to switch the four-way valve to stop the machine during defrosting, the energy source for defrosting comes from the compressor 1 and the fan, thus saving energy. This facilitates achieving frost-free air conditioning and improves the user experience.

[0054] Optionally, the first heat exchanger 2 includes refrigerant piping and water piping, and the air conditioner also includes a hot water storage tank. The outlet of the hot water storage tank is connected to the inlet of the water piping of the first heat exchanger 2, and the inlet of the hot water storage tank 9 is connected to the outlet of the water piping of the first heat exchanger 2. This facilitates better transfer of heat from the refrigerant in the first heat exchanger 2 to the hot water storage tank through the water piping, thereby increasing the defrosting heat and improving the defrosting rate and effect.

[0055] Optionally, the third heat exchanger 5 is a multi-medium heat exchanger. This facilitates better heat transfer from the refrigerant in the first heat exchanger 2 to the outside through other media, thereby increasing the defrosting heat capacity and improving the defrosting rate and effect.

[0056] Optionally, the head, power, and water pressure of pump 8 are related. Specifically, the pump power is the product of the pump head and the water pressure. More specifically, at a water pressure of 200 kPa, the pump head is 20 m. This facilitates better selection of the pump and thus better control of its power.

[0057] Optionally, the fan coil unit includes a first fan coil unit 6 and a second fan coil unit 9. The first fan coil unit 6 and the second fan coil unit 9 are connected in parallel. This helps to increase the defrosting heat in the water circulation system, thereby improving the defrosting rate and defrosting effect.

[0058] The air conditioner provided in this embodiment has a refrigerant circulation system with three heat exchangers. The refrigerant circulation system and the water circulation system exchange heat in the second heat exchanger 3. The heat from the compressor 1's exhaust is supplied to the second heat exchanger 3 and then to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor 1, reducing the occurrence of liquid slugging in the compressor 1 and improving the reliability of the compressor 1 and the entire system. Since the refrigerant circulation system and the water circulation system exchange heat directly in the second heat exchanger 3, the defrosting heat in the water circulation system is large, improving the defrosting rate and effect. It also provides a structural basis for controlling the power of the water pump 8 and / or the frequency of the compressor 1 and the opening degree of the electronic expansion valve 4 based on the return gas pressure of the compressor 1 and the surface temperature of the third heat exchanger 5. Since there is no need to switch the four-way valve to stop the machine during defrosting, the energy source for defrosting comes from the compressor 1 and the fan, thus saving energy. This facilitates achieving frost-free air conditioning and improves the user experience.

[0059] Combination Figure 2 As shown in the embodiments of this disclosure, a method for controlling an air conditioner is provided, comprising:

[0060] S201, the air conditioner determines whether it is frosting based on the return gas pressure of the compressor and the surface temperature of the third heat exchanger.

[0061] S202, the air conditioner controls the power of the water pump and / or the frequency of the compressor and the opening degree of the electronic expansion valve according to whether the air conditioner is frosted.

[0062] The method for controlling an air conditioner provided in this disclosure involves a refrigerant circulation system with three heat exchangers. The refrigerant circulation system and the water circulation system exchange heat in the second heat exchanger. The heat from the compressor exhaust is provided to the second heat exchanger and then to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, reducing the occurrence of liquid slugging and improving the reliability of the compressor and the entire system. Because the refrigerant circulation system and the water circulation system exchange heat directly in the second heat exchanger, the defrosting heat in the water circulation system is large, increasing the defrosting rate and effect. Since there is no need to switch the four-way valve to stop the machine during defrosting, the energy source for defrosting comes from the compressor and fan, thus saving energy. The power of the water pump and / or the compressor frequency and the opening of the electronic expansion valve are controlled based on the compressor's return gas pressure and the surface temperature of the third heat exchanger. This balances increasing the defrosting heat in the water circulation system with reducing energy consumption, improving the defrosting rate and effect. This facilitates achieving frost-free air conditioning and enhances the user experience.

[0063] Optionally, the air conditioner determines whether it is frosted based on the compressor's return gas pressure and the surface temperature of the third heat exchanger. This includes determining that the air conditioner is frosted when the saturation temperature corresponding to the compressor's return gas pressure is lower than a first temperature threshold and the surface temperature of the third heat exchanger is lower than a second temperature threshold. Specifically, the first temperature threshold can be -1℃, and the second temperature threshold can be 0℃. Thus, if both the compressor's return gas pressure and the surface temperature of the third heat exchanger are low, the air conditioner is determined to be frosted. This allows for more accurate frosting determination, which in turn allows for more precise control of the water pump power and / or the compressor frequency and the opening of the electronic expansion valve based on whether the air conditioner is frosted. Furthermore, it allows for a more precise balance between increasing defrosting heat in the water circulation system and reducing energy consumption, improving the defrosting rate and effect. This ultimately contributes to achieving frost-free air conditioning and improving the user experience.

[0064] Optionally, the air conditioner determines whether it is frosting based on the compressor's return gas pressure and the surface temperature of the third heat exchanger. This includes determining that the air conditioner is not frosting if the saturation temperature corresponding to the compressor's return gas pressure is greater than or equal to a first temperature threshold, or if the surface temperature of the third heat exchanger is greater than or equal to a second temperature threshold. Thus, if the compressor's return gas pressure or the surface temperature of the third heat exchanger is high, the air conditioner is determined not to be frosting. This allows for more accurate determination of whether the air conditioner is frosting, which in turn allows for more precise control of the water pump power and / or the compressor frequency and the opening of the electronic expansion valve based on whether the air conditioner is frosting. Furthermore, this allows for a more precise balance between increasing defrosting heat in the water circulation system and reducing energy consumption, improving the defrosting rate and defrosting effect. Ultimately, this contributes to achieving frost-free air conditioning and improving the user experience.

[0065] Optionally, the air conditioner controls the power of the water pump and / or the frequency of the compressor and the opening of the electronic expansion valve based on whether the air conditioner is frosted. This includes: adjusting the power of the water pump when the air conditioner is frosted; and adjusting the power of the water pump, the frequency of the compressor, and the opening of the electronic expansion valve when the air conditioner is not frosted. Thus, if the air conditioner is not frosted, the power of the water pump needs to be adjusted to defrost the air conditioner. If the air conditioner is not frosted, the power of the water pump needs to be adjusted to prevent frosting. Simultaneously, while preventing frosting, the frequency of the compressor and the opening of the electronic expansion valve are adjusted to better reduce energy consumption, thereby balancing the prevention of frosting and the reduction of energy consumption.

[0066] Optionally, the air conditioner adjusts the power of the water pump by: adjusting the frequency of the water pump according to the surface temperature of the third heat exchanger to keep the surface temperature of the third heat exchanger within a first temperature range. Thus, if the air conditioner frosts, the power of the water pump is adjusted according to the surface temperature of the third heat exchanger to keep the surface temperature of the third heat exchanger within the first temperature range. This ensures that the surface temperature of the third heat exchanger can be maintained within the first temperature range suitable for defrosting. To prevent excessive heat loss from the compressor exhaust, which could affect the capacity of the air conditioner system, the water flow rate in the water circulation loop is controlled by controlling the power of the water pump, thereby controlling the heat provided for defrosting and achieving defrosting of the air conditioner. This helps to balance increasing the defrosting heat in the water circulation system with reducing energy consumption, improving the defrosting rate and defrosting effect. It also helps to better achieve frost-free operation of the air conditioner and improve the user experience.

[0067] Optionally, the air conditioner adjusts the water pump frequency based on the surface temperature of the third heat exchanger, including: increasing the water pump power when the surface temperature of the third heat exchanger is in the second temperature range; maintaining the water pump power constant when the surface temperature of the third heat exchanger is in the first temperature range; and decreasing the water pump power when the surface temperature of the third heat exchanger is in the third temperature range. The second temperature range is shorter than the first temperature range, and the first temperature range is shorter than the third temperature range. Thus, when the air conditioner needs defrosting, if the surface temperature of the third heat exchanger is lower than the suitable first temperature range for defrosting, the water pump power is higher. If the surface temperature of the third heat exchanger is higher than the suitable first temperature range for defrosting, the water pump power is higher. If the surface temperature of the third heat exchanger is within the suitable first temperature range for defrosting, the water pump power remains constant. All three cases ensure that the surface temperature of the third heat exchanger is within the first temperature range. To prevent excessive heat loss from the compressor exhaust, which could affect the air conditioner system's capacity, the water flow rate in the water circulation loop is controlled by controlling the water pump power, thereby controlling the heat provided for defrosting and achieving air conditioner defrosting. This helps to balance increasing defrosting heat in the water circulation system with reducing energy consumption, thereby improving defrosting rate and effect. It also helps to achieve frost-free air conditioning and enhances the user experience.

[0068] Optionally, the first temperature range can be (0℃, 1℃). The second temperature range can be (-∞, 0℃). The third temperature range can be (1℃, +∞). The values ​​of the first, second, and third temperature ranges can be adjusted according to the air conditioner's properties, and will not be listed here. In this way, setting the value range of the first temperature range can reduce compressor exhaust energy consumption and has a smaller impact on the evaporation temperature. This improves the defrosting rate and effect while minimizing the impact on heating, thereby enhancing the user's heating experience.

[0069] Optionally, the air conditioner adjusts the power of the water pump, the frequency of the compressor, and the opening of the electronic expansion valve, including: adjusting the water pump power based on the outlet water temperature of the third heat exchanger to ensure the outlet water temperature of the third heat exchanger is within a first temperature range; and adjusting the compressor frequency and the opening of the electronic expansion valve based on the outlet water temperature and evaporation temperature of the third heat exchanger. In this way, if the air conditioner does not frost, first adjusting the water pump power based on the outlet water temperature of the third heat exchanger more precisely increases the defrosting heat in the water circulation system, preventing frost formation. Then, adjusting the compressor frequency and the opening of the electronic expansion valve based on the outlet water temperature and evaporation temperature of the third heat exchanger helps to more accurately reduce energy consumption. This facilitates better frost-free operation of the air conditioner and improves the user experience.

[0070] Optionally, the air conditioner adjusts the water pump power based on the outlet water temperature of the third heat exchanger, including: increasing the water pump power when the outlet water temperature of the third heat exchanger is in the second temperature range; keeping the water pump power constant when the outlet water temperature of the third heat exchanger is in the first temperature range; and decreasing the water pump power when the outlet water temperature of the third heat exchanger is in the third temperature range. The second temperature range is shorter than the first temperature range, and the first temperature range is shorter than the third temperature range. Thus, without frosting, the water pump power is adjusted based on the outlet water temperature of the third heat exchanger. If the outlet water temperature of the third heat exchanger is lower than the suitable first temperature range for defrosting, the water pump power is higher. If the outlet water temperature of the third heat exchanger is higher than the suitable first temperature range for defrosting, the water pump power is higher. If the outlet water temperature of the third heat exchanger is within the suitable first temperature range for defrosting, the water pump power remains constant. All three scenarios ensure that the surface temperature of the third heat exchanger is within the first temperature range, achieving defrosting of the air conditioner. This prevents excessive heat loss from the compressor exhaust, which could affect the capacity of the air conditioning system. By controlling the power of the water pump, the water flow rate in the water circulation loop is controlled, thereby controlling the heat provided for defrosting and achieving defrosting of the air conditioner. This helps to balance increasing the defrosting heat in the water circulation system with reducing energy consumption, improving the defrosting rate and effect. Ultimately, this facilitates achieving frost-free operation of the air conditioner and enhances the user experience.

[0071] Optionally, the air conditioner increases the power of the water pump, including: increasing the water pump power according to a power change value, where the water pump power is within a set power range, and the power change value is the product of the current water pump power and a set percentage value. Specifically, the set power range can be [50%, 100%]. The set percentage value can be 1%. The water pump power is the product of the water pump head and the water pressure. This prevents excessive heat loss from the compressor exhaust, which could affect the air conditioner system's capacity. By controlling the increased water pump power, the water flow rate in the water circulation loop is increased, thereby increasing the heat provided for defrosting and enabling faster defrosting. This helps to balance increasing defrosting heat in the water circulation system with reducing energy consumption, improving defrosting rate and effect. It also contributes to achieving frost-free operation and improving the user experience.

[0072] Optionally, the air conditioner reduces the power of the water pump, including: the air conditioner reduces the water pump power according to a power change value, where the water pump power is within a set power range, and the power change value is the product of the current water pump power and a set proportional value. This prevents excessive heat loss from the compressor exhaust, which could affect the air conditioner system's capacity. By controlling the reduction of the water pump power, the water flow rate in the water circulation loop is increased, thereby reducing the heat provided for defrosting and reducing energy consumption while defrosting the air conditioner. This further helps to balance increasing defrosting heat in the water circulation system and reducing energy consumption, improving the defrosting rate and effect. This contributes to achieving frost-free operation of the air conditioner and improving the user experience.

[0073] Optionally, the air conditioner adjusts the compressor frequency and the opening of the electronic expansion valve based on the outlet water temperature and evaporation temperature of the third heat exchanger. This includes: the air conditioner determining the absolute value of the temperature difference between the outlet water temperature and the evaporation temperature of the third heat exchanger; and adjusting the compressor frequency and the opening of the electronic expansion valve based on the absolute value of the temperature difference. In this way, if the air conditioner does not frost, after adjusting the water pump power based on the outlet water temperature of the third heat exchanger to prevent frost formation, the compressor frequency and the opening of the electronic expansion valve are then adjusted based on the absolute value of the temperature difference between the outlet water temperature and the evaporation temperature of the third heat exchanger. This ensures that the evaporation temperature and outlet water temperature of the third heat exchanger are approximately the same, minimizing the impact on the system, facilitating the achievement of a steady state, and allowing the system to operate in a relatively energy-saving state. This facilitates more precise energy consumption reduction and ultimately helps to achieve frost-free operation, improving the user experience.

[0074] Optionally, the air conditioner adjusts the compressor frequency and the opening of the electronic expansion valve based on the absolute value of the temperature difference, including: when the absolute value of the temperature difference is within the fourth temperature range, the air conditioner maintains the compressor frequency and the opening of the electronic expansion valve unchanged. When the absolute value of the temperature difference is not within the fourth temperature range, the air conditioner increases the compressor frequency and the opening of the electronic expansion valve to bring the absolute value of the temperature difference into the fourth temperature range. Thus, if the air conditioner does not frost, after adjusting the water pump power according to the outlet water temperature of the third heat exchanger to prevent frost formation, the compressor frequency and the opening of the electronic expansion valve are adjusted based on the absolute value of the temperature difference between the outlet water temperature and the evaporation temperature of the third heat exchanger. If the absolute value of the temperature difference is not within the fourth temperature range, increasing the compressor frequency and the opening of the electronic expansion valve increases the heat exchange between the refrigerant circulation loop and the water circulation loop, stabilizing the absolute value of the temperature difference within the fourth temperature range. If the temperature difference is within the fourth temperature range, the compressor frequency and the opening of the electronic expansion valve need to be kept constant. This ensures that the evaporation temperature of the third heat exchanger is close to its outlet water temperature, minimizing its impact on the system and facilitating the achievement of a steady state, allowing the system to operate in a relatively energy-efficient manner. This facilitates more precise energy consumption reduction and, consequently, better frost-free operation of the air conditioner, enhancing the user experience.

[0075] Optionally, the air conditioner increases the compressor frequency and the opening of the electronic expansion valve, including: increasing the compressor frequency by a frequency change value and increasing the electronic expansion valve opening by an opening change value. Specifically, the frequency change value can be 1Hz, and the opening change value can be one step. In this way, if the absolute value of the temperature difference is not within the fourth temperature range, increasing the compressor frequency by a smaller frequency change value and increasing the electronic expansion valve opening by a smaller opening change value increases the heat exchange between the refrigerant circulation loop and the water circulation loop, thus stabilizing the absolute value of the temperature difference within the fourth temperature range. This helps avoid large temperature difference fluctuations, ensuring that the evaporation temperature of the third heat exchanger is approximately the same as the outlet water temperature of the third heat exchanger, minimizing the impact on the system, facilitating the achievement of a steady state, and allowing the system to operate in a relatively energy-saving state. This facilitates more precise energy consumption reduction and, consequently, better achieves frost-free operation, improving the user experience.

[0076] Combination Figure 3 As shown in the embodiments of this disclosure, another method for controlling an air conditioner is provided, including:

[0077] S301, the air conditioner determines whether it is frosting based on the compressor's return pressure and the surface temperature of the third heat exchanger.

[0078] S302, When the air conditioner is frosted, the air conditioner adjusts the power of the water pump.

[0079] S303, when the air conditioner is not frosting, adjusts the power of the water pump, the frequency of the compressor, and the opening of the electronic expansion valve.

[0080] The method for controlling an air conditioner provided in this disclosure has three heat exchangers in its refrigerant circulation system. The refrigerant circulation system and the water circulation system exchange heat in the second heat exchanger. The heat from the compressor exhaust is provided to the second heat exchanger and then to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, reducing the occurrence of liquid slugging and improving the reliability of the compressor and the entire system. Since the refrigerant circulation system and the water circulation system exchange heat directly in the second heat exchanger, the defrosting heat in the water circulation system is greater, improving the defrosting rate and effect. Because there is no need to switch the four-way valve to stop the machine during defrosting, the energy source for defrosting comes from the compressor and fan power, thus saving energy. If the air conditioner does not frost, the power of the water pump needs to be adjusted to defrost it. If the air conditioner does not frost, the power of the water pump needs to be adjusted to prevent frost formation. Simultaneously, while preventing frost formation, the compressor frequency and the opening of the electronic expansion valve are adjusted to further reduce energy consumption, thus balancing the prevention of frost formation and energy reduction. This approach balances increasing defrosting heat in the water circulation system with reducing energy consumption, thereby improving defrosting rate and effectiveness. It also helps achieve frost-free operation in air conditioners, enhancing the user experience.

[0081] Combination Figure 4 As shown in the embodiments of this disclosure, another method for controlling an air conditioner is provided, including:

[0082] S401, the air conditioner determines whether it is frosting based on the compressor's return pressure and the surface temperature of the third heat exchanger.

[0083] S402, When the air conditioner is frosted, the air conditioner adjusts the power of the water pump.

[0084] S403, when the air conditioner is not frosting, the air conditioner adjusts the power of the water pump according to the outlet water temperature of the third heat exchanger so that the surface temperature of the third heat exchanger is in the first temperature range.

[0085] S404, the air conditioner adjusts the compressor frequency and the opening of the electronic expansion valve according to the outlet water temperature and evaporation temperature of the third heat exchanger.

[0086] The method for controlling an air conditioner provided in this disclosure involves a refrigerant circulation system with three heat exchangers. The refrigerant circulation system and the water circulation system exchange heat in the second heat exchanger. The heat from the compressor exhaust is provided to the second heat exchanger and then to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, reducing the occurrence of liquid slugging and improving the reliability of the compressor and the entire system. Since the refrigerant circulation system and the water circulation system exchange heat directly in the second heat exchanger, the defrosting heat in the water circulation system is large, increasing the defrosting rate and effect. Because there is no need to switch the four-way valve to stop the machine during defrosting, the energy source for defrosting comes from the compressor and fan, thus saving energy. If the air conditioner does not frost, the power of the water pump needs to be adjusted to defrost it. If the air conditioner does not frost, the power of the water pump is adjusted based on the outlet water temperature of the third heat exchanger to more precisely increase the defrosting heat in the water circulation system and prevent the air conditioner from frostring. Furthermore, by adjusting the compressor frequency and the opening of the electronic expansion valve based on the outlet water temperature and evaporation temperature of the third heat exchanger, energy consumption can be reduced more precisely. This balances increasing defrosting heat in the water circulation system with reducing energy consumption, improving defrosting rate and effect. Ultimately, this facilitates achieving frost-free operation in air conditioning and enhances the user experience.

[0087] Combination Figure 5 As shown, this disclosure provides an apparatus 200 for controlling an air conditioner, including a determining module 501 and a controlling module 502. The determining module 501 is configured to determine whether the air conditioner is frosted based on the compressor's return gas pressure and the surface temperature of a third heat exchanger. The controlling module 502 is configured to control the power of the water pump, and / or the compressor's frequency and the opening degree of the electronic expansion valve based on whether the air conditioner is frosted.

[0088] The device for controlling an air conditioner provided in this disclosure has three heat exchangers in its refrigerant circulation system. The refrigerant circulation system and the water circulation system exchange heat in the second heat exchanger. The heat from the compressor exhaust is provided to the second heat exchanger and then to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, reducing the occurrence of liquid slugging and improving the reliability of the compressor and the entire system. Since the refrigerant circulation system and the water circulation system exchange heat directly in the second heat exchanger, the defrosting heat in the water circulation system is large, increasing the defrosting rate and effect. Because there is no need to switch the four-way valve to stop the machine during defrosting, the energy source for defrosting comes from the compressor and the fan, thus saving energy. The power of the water pump and / or the compressor frequency and the opening of the electronic expansion valve are controlled based on the compressor's return gas pressure and the surface temperature of the third heat exchanger. This balances increasing the defrosting heat in the water circulation system with reducing energy consumption, improving the defrosting rate and effect. This facilitates achieving frost-free air conditioning and improves the user experience.

[0089] Combination Figure 6 As shown in the figure, this disclosure provides a device 300 for controlling an air conditioner, including a processor 600 and a memory 601. Optionally, the device may further include a communication interface 602 and a bus 603. The processor 600, communication interface 602, and memory 601 can communicate with each other via the bus 603. The communication interface 602 can be used for information transmission. The processor 600 can call logical instructions in the memory 601 to execute the method for controlling the air conditioner described in the above embodiment.

[0090] Furthermore, the logic instructions in the aforementioned memory 601 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0091] The memory 601, 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 600 executes functional applications and data processing by running the program instructions / modules stored in the memory 601, thereby implementing the method for controlling the air conditioner described in the above embodiments.

[0092] The memory 601 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 601 may include high-speed random access memory and may also include non-volatile memory.

[0093] Combination Figure 7 As shown, this disclosure provides an air conditioner 100, including: an air conditioner body, and the aforementioned device 200 (300) for controlling the air conditioner. The device 200 (300) for controlling the air conditioner is installed on the air conditioner body. The installation relationship described herein is not limited to placement inside the air conditioner, but also includes installation connections with other components of the air conditioner, including but not limited to physical connections, electrical connections, or signal transmission connections. Those skilled in the art will understand that the device 200 (300) for controlling the air conditioner can be adapted to feasible air conditioner bodies to achieve other feasible embodiments.

[0094] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for controlling an air conditioner.

[0095] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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 an air conditioner, characterized by, The air conditioner comprises: a refrigerant circulation system comprising a compressor, a first heat exchanger, a second heat exchanger, an electronic expansion valve and a third heat exchanger connected in sequence, the second heat exchanger comprising a refrigerant pipeline and a water pipeline for heat exchange; a water circulation system comprising a fan disc, an expansion water tank and a water pump connected in sequence in parallel, wherein the outlet of the water pump is connected to the inlet of the water pipeline of the second heat exchanger, and the inlet of the fan disc is connected to the outlet of the water pipeline of the second heat exchanger; and the method comprises: determining whether the air conditioner is frosting according to the back gas pressure of the compressor and the surface temperature of the third heat exchanger; controlling the power of the water pump, and / or the frequency of the compressor and the opening degree of the electronic expansion valve according to whether the air conditioner is frosting; wherein, according to whether the air conditioner is frosting, the power of the water pump, and / or the frequency of the compressor and the opening degree of the electronic expansion valve are controlled, including: in the case that the air conditioner is frosting, the power of the water pump is adjusted; specifically including: the power of the water pump is adjusted according to the surface temperature of the third heat exchanger, so that the surface temperature of the third heat exchanger is in a first temperature interval.

2. The method of claim 1, wherein, The first heat exchanger comprises a refrigerant pipeline and a water pipeline, and the air conditioner further comprises: a heat storage water tank, the outlet of the heat storage water tank is connected to the inlet of the water pipeline of the first heat exchanger, and the inlet of the heat storage water tank is connected to the outlet of the water pipeline of the first heat exchanger.

3. The method of claim 1, wherein, determining whether the air conditioner is frosting according to the back gas pressure of the compressor and the surface temperature of the third heat exchanger, including: in the case that the saturation temperature corresponding to the back gas pressure of the compressor is less than a first temperature threshold, and the surface temperature of the third heat exchanger is less than a second temperature threshold, it is determined that the air conditioner is frosting.

4. The method of claim 1, wherein, controlling the power of the water pump, and / or the frequency of the compressor and the opening degree of the electronic expansion valve according to whether the air conditioner is frosting, further including: in the case that the air conditioner is not frosting, the power of the water pump, the frequency of the compressor and the opening degree of the electronic expansion valve are adjusted.

5. An apparatus for controlling an air conditioner, characterized by comprising: The air conditioner comprises: a refrigerant circulation system comprising a compressor, a first heat exchanger, a second heat exchanger, an electronic expansion valve and a third heat exchanger connected in sequence, the second heat exchanger comprising a refrigerant pipeline and a water pipeline for heat exchange; a water circulation system comprising a fan disc, an expansion water tank and a water pump connected in sequence in parallel, wherein the outlet of the water pump is connected to the inlet of the water pipeline of the second heat exchanger, and the inlet of the fan disc is connected to the outlet of the water pipeline of the second heat exchanger; and the device comprises: a determination module configured to determine whether the air conditioner is frosting according to the back gas pressure of the compressor and the surface temperature of the third heat exchanger; a control module configured to control the power of the water pump, and / or the frequency of the compressor and the opening degree of the electronic expansion valve according to whether the air conditioner is frosting; wherein, according to whether the air conditioner is frosting, the power of the water pump, and / or the frequency of the compressor and the opening degree of the electronic expansion valve are controlled, including: in the case that the air conditioner is frosting, the power of the water pump is adjusted; specifically including: the power of the water pump is adjusted according to the surface temperature of the third heat exchanger, so that the surface temperature of the third heat exchanger is in a first temperature interval.

6. An apparatus for controlling an air conditioner, comprising a processor and a memory having stored program instructions, characterized in that, The processor is configured to execute the method for controlling the air conditioner according to any one of claims 1 to 4 when running the program instructions.

7. An air conditioner characterized by comprising: including: an air conditioner body; The device for controlling an air conditioner as claimed in claim 5 or 6 is installed in the body of the air conditioner.

8. A storage medium storing program instructions, characterized in that, The program instructions, when executed, perform the method for controlling an air conditioner as claimed in any one of claims 1 to 4.

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