Method and device for controlling air conditioner, air conditioner and 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 which are connected in sequence, and the second heat exchanger comprises a refrigerant pipeline and a water pipeline for heat exchange; the water circulation system comprises an air disc, an expansion water tank and a water pump which are sequentially connected in parallel, an outlet of the water pump is connected with an inlet of the water pipeline of the second heat exchanger, and an inlet of the air disc is connected with an outlet of the water pipeline of the second heat exchanger. The invention further discloses a method for controlling the air conditioner. The method comprises the steps that whether the air conditioner is frosted or not is determined according to the return air pressure of the compressor and the surface temperature of the third heat exchanger; and controlling the power of a water pump and / or the frequency of a compressor and the opening degree of an electronic expansion valve according to the condition whether the air conditioner is frosted or not. The defrosting heat is increased, the defrosting speed and the defrosting effect are improved, the liquid impact phenomenon of the compressor is reduced, and the reliability of the compressor and even the system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method and device for controlling an air conditioner, an air conditioner, and a storage medium. Background Art

[0002] At present, with the improvement of people's living standards, people have put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an indispensable equipment in people's lives. However, during the operation of air conditioners, frost is prone to occur.

[0003] The related technology discloses a control method for defrosting an air-conditioning system, the air-conditioning system includes 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 also includes a water heat exchange system for exchanging heat with the second heat exchanger, the control method includes: according to the second heat exchanger of the air-conditioning system being in a heat release state, obtaining the current inlet and outlet water temperature difference of the water heat exchange system; calculating the current heat exchange energy of the water heat exchanger according to the current inlet and outlet water temperature difference and the water flow rate of the water heat exchange system; according to the current ratio of the current heat exchange energy to the current operating frequency of the compressor being outside the threshold range of a preset ratio, controlling the first heat exchanger of the air-conditioning system to enter a defrost mode.

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

[0005] The defrosting method involved in the related art has low defrosting heat, resulting in slow defrosting and poor defrosting effect. In addition, high-temperature gaseous refrigerant enters the compressor without evaporation, which is prone to cause liquid hammer, affecting the reliability of the compressor and even the system.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

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

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

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

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

[0012] Optionally, the lift of the water pump is associated with the power and the water pressure. Specifically, the power of the water pump is the product of the lift of the water pump and the water pressure. More specifically, when the water pressure is 200 kPa, the lift of the water pump is 20 m.

[0013] Optionally, the wind disk includes a first wind disk and a second wind disk, and the first wind disk and the second wind disk are connected in parallel.

[0014] In some embodiments, the method is applied to the air conditioner, including: determining whether the air conditioner is frosted based on the return air 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 of the electronic expansion valve based on whether the air conditioner is frosted.

[0015] Optionally, whether the air conditioner is frosted is determined based on the return air pressure of the compressor and the surface temperature of the third heat exchanger, including: when the saturation temperature corresponding to the return air 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, determining that the air conditioner is frosted.

[0016] Specifically, the value of the first temperature threshold may be -1°C. The value of the second temperature threshold may be 0°C.

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

[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 the first temperature range.

[0019] Optionally, adjusting the frequency of the water pump according to the surface temperature of the third heat exchanger includes: when the surface temperature of the third heat exchanger is in the second temperature range, increasing the power of the water pump. When the surface temperature of the third heat exchanger is in the first temperature range, keeping the power of the water pump unchanged. When the surface temperature of the third heat exchanger is in the third temperature range, reducing the power of the water pump. The second temperature range is smaller than the first temperature range, and the first temperature range is smaller than the third temperature range.

[0020] Optionally, the value of the first temperature interval may be (0° C., 1° C.), the value of the second temperature interval may be (-∞, 0° C.), and the value of the third temperature interval may be (1° C., +∞).

[0021] Optionally, the power of the water pump, the frequency of the compressor and the opening of the electronic expansion valve are adjusted, including: 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 in the first temperature range; adjusting the frequency of the compressor and the opening of the electronic expansion valve according to the outlet water temperature of the third heat exchanger and the evaporation temperature of the third heat exchanger.

[0022] Optionally, adjusting the power of the water pump according to the outlet water temperature of the third heat exchanger includes: when the outlet water temperature of the third heat exchanger is in the second temperature range, increasing the power of the water pump. When the outlet water temperature of the third heat exchanger is in the first temperature range, keeping the power of the water pump unchanged. When the outlet water temperature of the third heat exchanger is in the third temperature range, reducing the power of the water pump. Wherein, the second temperature range is smaller than the first temperature range, and the first temperature range is smaller 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, the power of the water pump is in a set power range, wherein the power change value is the product of the current power of the water pump and the set ratio value. Specifically, the value of the set power range can be [50%, 100%]. The value of the set ratio value can be 1%.

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

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

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

[0027] Optionally, increasing the frequency of the compressor and the opening of the electronic expansion valve includes: increasing the frequency of the compressor according to the frequency change value, and increasing the opening of the electronic expansion valve according to the opening change value.

[0028] Specifically, the frequency change value may be 1 Hz, and the opening change value may be 1 step.

[0029] In some embodiments, the device is applied to the air conditioner, including: a determination module, configured to determine whether the air conditioner is frosted based on the return air 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 of the electronic expansion valve according to whether the air conditioner is frosted.

[0030] In some embodiments, the device includes a processor and a memory storing program instructions, and the processor is configured to execute the method for controlling the air conditioner when running the program instructions.

[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, and when the program instructions are run, the method for controlling the air conditioner is executed.

[0033] The method and device for controlling an air conditioner, the air conditioner, and the storage medium provided in the embodiments of the present 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 are designed to exchange heat in the second heat exchanger. The heat of 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, which reduces the occurrence of compressor liquid hammer and improves the reliability of the compressor and even the system. Since the refrigerant circulation system and the water circulation system directly exchange heat in the second heat exchanger, the defrosting heat in the water circulation system is large, which improves the defrosting rate and defrosting effect. It also provides a structural basis for controlling the power of the water pump and / or the frequency of the compressor and the opening of the electronic expansion valve according to the return air pressure of the compressor and the surface temperature of the third heat exchanger. Since there is no need to switch the four-way valve to shut down during the defrosting process, the energy required for defrosting comes from the compressor and wind power, so energy can be better saved. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0035] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0037] Figure 1 An air conditioner provided by an embodiment of the present disclosure;

[0038] Figure 2 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0039] Figure 3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0040] Figure 4 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0041] Figure 5 is a schematic diagram of a device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0042] Figure 6 is a schematic diagram of another device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0043] Figure 7 It is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] In order to be able 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 is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0045] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

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

[0047] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0048] The term "and / or" is a description of the association relationship 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" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0050] In the embodiments of the present disclosure, smart home appliances refer to home appliances that are formed by introducing microprocessors, sensor technology, and network communication technology into home appliances. They have the characteristics of intelligent control, intelligent perception, and intelligent application. The operation process 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 the smart home appliances.

[0051] In the disclosed embodiments, the terminal device refers to an electronic device with a wireless connection function. The terminal device can communicate with the above-mentioned smart home appliances by connecting to the Internet, or can communicate with the above-mentioned smart home appliances directly through Bluetooth, WiFi, etc. In some embodiments, the terminal device is, for example, a mobile device, a computer, or a vehicle-mounted device built into a hover car, or any combination thereof. Mobile devices may include, for example, mobile phones, smart home devices, wearable devices, smart mobile devices, virtual reality devices, etc., or any combination thereof, wherein wearable devices include, for example: smart watches, smart bracelets, pedometers, etc.

[0052] Combination Figure 1 As shown, an embodiment of the present 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 in sequence, and the second heat exchanger 3 includes a refrigerant pipeline and a water pipeline for heat exchange. The water circulation system includes a parallel fan disk, an expansion water tank 7, and a water pump 8 connected in sequence, wherein the outlet of the water pump 8 is connected to the inlet of the water pipeline of the second heat exchanger 3, and the inlet of the fan disk is connected to the outlet of the water pipeline of the second heat exchanger 3.

[0053] The air conditioner provided by the embodiment of the present disclosure has three heat exchangers in the refrigerant circulation system. The refrigerant circulation system and the water circulation system are designed to exchange heat in the second heat exchanger 3. After the heat of the exhaust gas of the compressor 1 is provided to the second heat exchanger 3, it is provided to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and will not directly enter the compressor 1, which reduces the occurrence of liquid hammer in the compressor 1 and improves the reliability of the compressor 1 and even the system. Since the refrigerant circulation system and the water circulation system directly exchange heat in the second heat exchanger 3, the defrosting heat in the water circulation system is large, which improves the defrosting rate and defrosting effect. And it provides a structural basis for controlling the power of the water pump 8 and / or the frequency of the compressor 1 and the opening of the electronic expansion valve 4 according to the return air 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 during the defrosting process, the energy source required for defrosting comes from the compressor 1 and wind power, so energy can be better saved. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0054] Optionally, the first heat exchanger 2 includes a refrigerant pipeline and a water pipeline, and the air conditioner further includes: a hot water storage tank, the outlet of the hot water storage tank is connected to the inlet of the water pipeline of the first heat exchanger 2, and the inlet of the hot water storage tank 9 is connected to the outlet of the water pipeline of the first heat exchanger 2. In this way, it is beneficial to better conduct the heat of the refrigerant in the first heat exchanger 2 to the hot water storage tank through the water pipeline, which is beneficial to increase the defrosting heat, improve the defrosting rate and defrosting effect.

[0055] Optionally, the third heat exchanger 5 is a multi-media heat exchanger. In this way, it is beneficial to better conduct the heat of the refrigerant in the first heat exchanger 2 to the outside through other media, which is beneficial to increase the defrosting heat, improve the defrosting rate and the defrosting effect.

[0056] Optionally, the lift of the water pump 8 is associated with the power and the water pressure. Specifically, the power of the water pump is the product of the lift of the water pump and the water pressure. More specifically, when the water pressure is 200 kPa, the lift of the water pump is 20 m. This is conducive to better determining the selection of the water pump, thereby better controlling the power of the water pump.

[0057] Optionally, the wind disk includes a first wind disk 6 and a second wind disk 9. The first wind disk 6 and the second wind disk 9 are connected in parallel. In this way, it is beneficial to increase the defrosting heat in the water circulation system, and improve the defrosting rate and defrosting effect.

[0058] The air conditioner provided by the embodiment of the present disclosure has three heat exchangers in the refrigerant circulation system. The refrigerant circulation system and the water circulation system are designed to exchange heat in the second heat exchanger 3. After the heat of the exhaust gas of the compressor 1 is provided to the second heat exchanger 3, it is provided to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and will not directly enter the compressor 1, which reduces the occurrence of liquid hammer in the compressor 1 and improves the reliability of the compressor 1 and even the system. Since the refrigerant circulation system and the water circulation system directly exchange heat in the second heat exchanger 3, the defrosting heat in the water circulation system is large, which improves the defrosting rate and defrosting effect. And it provides a structural basis for controlling the power of the water pump 8 and / or the frequency of the compressor 1 and the opening of the electronic expansion valve 4 according to the return air 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 during the defrosting process, the energy source required for defrosting comes from the compressor 1 and wind power, so energy can be better saved. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0059] Combination Figure 2 As shown, the embodiment of the present disclosure provides a method for controlling an air conditioner, comprising:

[0060] S201, the air conditioner determines whether the air conditioner is frosted according to the return air 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 of the electronic expansion valve according to whether the air conditioner is frosted.

[0062] According to the method for controlling an air conditioner provided by the embodiment of the present disclosure, the refrigerant circulation system has three heat exchangers. The refrigerant circulation system and the water circulation system are designed to exchange heat in the second heat exchanger. After the heat of the compressor exhaust is provided to the second heat exchanger, it is provided to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, which reduces the occurrence of compressor liquid hammer and improves the reliability of the compressor and even the system. Since the refrigerant circulation system and the water circulation system directly exchange heat in the second heat exchanger, the defrosting heat in the water circulation system is large, which improves the defrosting rate and defrosting effect. Since there is no need to switch the four-way valve to stop during the defrosting process, the energy source required for defrosting comes from the compressor and wind power, so energy can be better saved. According to the return air pressure of the compressor and the surface temperature of the third heat exchanger, the power of the water pump and / or the frequency of the compressor and the opening of the electronic expansion valve are controlled. Thus, the defrosting heat in the water circulation system is increased and the energy consumption is reduced, and the defrosting rate and defrosting effect are improved. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0063] Optionally, the air conditioner determines whether the air conditioner is frosted according to the return air pressure of the compressor and the surface temperature of the third heat exchanger, including: when the saturation temperature corresponding to the return air pressure of the compressor is less than the first temperature threshold, and the surface temperature of the third heat exchanger is less than the second temperature threshold, the air conditioner determines that the air conditioner is frosted. Specifically, the value of the first temperature threshold can be -1°C. The value of the second temperature threshold can be 0°C. In this way, if the return air pressure of the compressor and the surface temperature of the third heat exchanger are both small, the air conditioner is determined to be frosted. It is conducive to more accurately determining whether the air conditioner is frosted, and thus it is conducive to more accurately controlling the power of the water pump, and / or the frequency of the compressor and the opening of the electronic expansion valve according to whether the air conditioner is frosted. It is further conducive to more accurately balancing the increase of defrosting heat and the reduction of energy consumption in the water circulation system, and improving the defrosting rate and defrosting effect. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0064] Optionally, the air conditioner determines whether the air conditioner is frosted based on the return air pressure of the compressor and the surface temperature of the third heat exchanger, including: when the saturation temperature corresponding to the return air pressure of the compressor is greater than or equal to the first temperature threshold, or the surface temperature of the third heat exchanger is greater than or equal to the second temperature threshold, the air conditioner determines that the air conditioner is not frosted. In this way, if the return air pressure of the compressor or the surface temperature of the third heat exchanger is large, it is determined that the air conditioner is not frosted. It is conducive to more accurately determining whether the air conditioner is frosted, and thus it is conducive to more accurately controlling the power of the water pump, and / or the frequency of the compressor and the opening of the electronic expansion valve according to whether the air conditioner is frosted. It is further conducive to more accurately balancing the increase of defrosting heat and the reduction of energy consumption in the water circulation system, and improving the defrosting rate and defrosting effect. It is conducive to better achieving frost-free air conditioning and improving 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 according to whether the air conditioner is frosted, including: when the air conditioner is frosted, the air conditioner adjusts the power of the water pump. When the air conditioner is not frosted, the air conditioner adjusts the power of the water pump, the frequency of the compressor and the opening of the electronic expansion valve. In this way, 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 avoid frosting, and on the basis of avoiding frosting, the frequency of the compressor and the opening of the electronic expansion valve are adjusted to better reduce energy consumption, thereby taking into account both avoiding frosting and reducing energy consumption.

[0066] Optionally, the air conditioner adjusts the power of the water pump, including: the air conditioner adjusts 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 in the first temperature range. In this way, if the air conditioner is frosted, 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 the first temperature range. Thereby, the surface temperature of the third heat exchanger can be maintained in the first temperature range that can defrost. To prevent excessive heat loss from the compressor exhaust gas, which affects the capacity of the air conditioner system. The water flow in the water circulation loop is controlled by controlling the power of the water pump, thereby controlling the heat provided by defrosting and achieving defrosting of the air conditioner. This is conducive to balancing the increase of defrosting heat and the reduction of energy consumption in the water circulation system, and improving the defrosting rate and defrosting effect. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0067] Optionally, the air conditioner adjusts the frequency of the water pump according to the surface temperature of the third heat exchanger, including: when the surface temperature of the third heat exchanger is in the second temperature interval, the air conditioner increases the power of the water pump. When the surface temperature of the third heat exchanger is in the first temperature interval, the air conditioner keeps the power of the water pump unchanged. When the surface temperature of the third heat exchanger is in the third temperature interval, the air conditioner reduces the power of the water pump. Among them, the second temperature interval is smaller than the first temperature interval, and the first temperature interval is smaller than the third temperature interval. In this way, when the air conditioner is frosted and needs to be defrosted, the lower the surface temperature of the third heat exchanger is and the lower it is than the first temperature interval suitable for defrosting, the higher the power of the water pump. If the surface temperature of the third heat exchanger is higher and higher than the first temperature interval suitable for defrosting, the higher the power of the water pump. If the surface temperature of the third heat exchanger is in the first temperature interval suitable for defrosting, the power of the water pump remains unchanged. All three situations make the surface temperature of the third heat exchanger in the first temperature interval. To prevent excessive exhaust heat loss of the compressor from affecting the capacity of the air conditioner system. The water flow in the water circulation loop is controlled by controlling the power of the water pump, thereby controlling the heat provided by defrosting to achieve defrosting of the air conditioner. This is conducive to balancing the increase of defrosting heat in the water circulation system and the reduction of energy consumption, improving the defrosting rate and defrosting effect, and helping to better achieve frost-free air conditioning and improve user experience.

[0068] Optionally, the value of the first temperature interval may be (0°C, 1°C). The value of the second temperature interval may be (-∞, 0°C). The value of the third temperature interval may be (1°C, +∞). The values ​​of the first temperature interval, the second temperature interval, and the third temperature interval can be adjusted and set according to the properties of the air conditioner, and are not listed one by one here. In this way, the value range setting of the first temperature interval can reduce the exhaust energy consumption of the compressor, and has less impact on the evaporation temperature, reducing the impact on heating on the basis of improving the defrost rate and defrost effect, thereby improving 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: the air conditioner adjusts the power of the water pump according to the outlet water temperature of the third heat exchanger so that the outlet water temperature of the third heat exchanger is in the first temperature range. The air conditioner adjusts the frequency of the compressor and the opening of the electronic expansion valve according to the outlet water temperature of the third heat exchanger and the evaporation temperature of the third heat exchanger. In this way, if the air conditioner does not frost, the power of the water pump is first adjusted according to the outlet water temperature of the third heat exchanger to more accurately increase the defrosting heat in the water circulation system and avoid frosting of the air conditioner. Then, according to the outlet water temperature of the third heat exchanger and the evaporation temperature of the third heat exchanger, the frequency of the compressor and the opening of the electronic expansion valve are adjusted, which is conducive to more accurately reducing energy consumption. This is conducive to better achieving frost-free air conditioning and improving user experience.

[0070] Optionally, the air conditioner adjusts the power of the water pump according to the outlet water temperature of the third heat exchanger, including: when the outlet water temperature of the third heat exchanger is in the second temperature range, the air conditioner increases the power of the water pump. When the outlet water temperature of the third heat exchanger is in the first temperature range, the air conditioner keeps the power of the water pump unchanged. When the outlet water temperature of the third heat exchanger is in the third temperature range, the air conditioner reduces the power of the water pump. Among them, the second temperature range is smaller than the first temperature range, and the first temperature range is smaller than the third temperature range. In this way, when the air conditioner is not frosted, the power of the water pump is adjusted according to the outlet water temperature of the third heat exchanger. If the outlet water temperature of the third heat exchanger is lower and lower than the first temperature range suitable for defrosting, the power of the water pump is higher. If the outlet water temperature of the third heat exchanger is higher and higher than the first temperature range suitable for defrosting, the power of the water pump is higher. If the outlet water temperature of the third heat exchanger is in the first temperature range suitable for defrosting, the power of the water pump remains unchanged. In all three cases, the surface temperature of the third heat exchanger is in the first temperature range, so as to achieve defrosting of the air conditioner. To prevent excessive exhaust heat loss of the compressor, the capacity of the air conditioner system is affected. By controlling the power of the water pump to control the water flow in the water circulation loop, the heat provided by defrosting is controlled to achieve defrosting of the air conditioner. This is conducive to balancing the increase of defrosting heat in the water circulation system and reducing energy consumption, improving the defrosting rate and defrosting effect, and helping to better achieve frost-free air conditioning and improve user experience.

[0071] Optionally, the air conditioner increases the power of the water pump, including: the air conditioner increases the power of the water pump according to the power change value, the power of the water pump is in a set power range, wherein the power change value is the product of the current power of the water pump and the set proportional value. Specifically, the value of the set power range can be [50%, 100%]. The value of the set proportional value can be 1%. The power of the water pump is the product of the head of the water pump and the water pressure. In this way, in order to prevent excessive heat loss from the compressor exhaust, the capacity of the air conditioner system is affected. By controlling the increase in the power of the water pump, the water flow in the water circulation loop is increased, thereby increasing the heat provided by defrosting and achieving faster defrosting of the air conditioner. This is conducive to taking into account both increasing the defrosting heat in the water circulation system and reducing energy consumption, and improving the defrosting rate and defrosting effect. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0072] Optionally, the air conditioner reduces the power of the water pump, including: the air conditioner reduces the power of the water pump according to the power change value, the power of the water pump is in a set power range, wherein the power change value is the product of the current power of the water pump and the set proportional value. In this way, in order to prevent excessive heat loss from the exhaust of the compressor, which affects the capacity of the air conditioner system. By controlling the reduction of the power of the water pump, the water flow in the water circulation loop is increased, thereby reducing the heat provided by defrosting, and reducing energy consumption on the basis of defrosting the air conditioner. This is conducive to balancing the increase of defrosting heat and the reduction of energy consumption in the water circulation system, and improving the defrosting rate and defrosting effect. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0073] Optionally, the air conditioner adjusts the frequency of the compressor and the opening of the electronic expansion valve according to the outlet water temperature of the third heat exchanger and the evaporation temperature of the third heat exchanger, including: the air conditioner determines the absolute value of the temperature difference between the outlet water temperature of the third heat exchanger and the evaporation temperature of the third heat exchanger. The air conditioner adjusts the frequency of the compressor and the opening of the electronic expansion valve according to the absolute value of the temperature difference. In this way, if the air conditioner does not frost, after adjusting the power of the water pump according to the outlet water temperature of the third heat exchanger to avoid frost on the air conditioner, the frequency of the compressor and the opening of the electronic expansion valve are adjusted according to the absolute value of the temperature difference between the outlet water temperature of the third heat exchanger and the evaporation temperature of the third heat exchanger. The evaporation temperature of the third heat exchanger is similar to the outlet water temperature of the third heat exchanger, which has little impact on the system, is easy to reach a steady state, and allows the system to operate in a relatively energy-saving state. It is conducive to reducing energy consumption more accurately. Thereby, it is conducive to better achieving frost-free air conditioning and improving user experience.

[0074] Optionally, the air conditioner adjusts the frequency of the compressor and the opening of the electronic expansion valve according to the absolute value of the temperature difference, including: when the absolute value of the temperature difference is in the fourth temperature interval, the air conditioner keeps the frequency of the compressor and the opening of the electronic expansion valve unchanged. When the absolute value of the temperature difference is not in the fourth temperature interval, the air conditioner increases the frequency of the compressor and the opening of the electronic expansion valve so that the absolute value of the temperature difference is in the fourth temperature interval. In this way, if the air conditioner does not frost, after adjusting the power of the water pump according to the outlet water temperature of the third heat exchanger to avoid frost on the air conditioner, the frequency of the compressor and the opening of the electronic expansion valve are adjusted according to the absolute value of the temperature difference between the outlet water temperature of the third heat exchanger and the evaporation temperature of the third heat exchanger. If the absolute value of the temperature difference is not in the fourth temperature interval, the frequency of the compressor and the opening of the electronic expansion valve are increased, thereby increasing the heat exchange amount between the refrigerant circulation loop and the water circulation loop, so that the absolute value of the temperature difference is stabilized in the fourth temperature interval. If the temperature difference is in the fourth temperature interval, the frequency of the compressor and the opening of the electronic expansion valve need to be kept unchanged. As a result, the evaporation temperature of the third heat exchanger is similar to the outlet water temperature of the third heat exchanger, which has little impact on the system and is easy to reach a steady state, so that the system can operate in a relatively energy-saving state. This is conducive to more accurate reduction of energy consumption. This is conducive to better achieving frost-free air conditioning and improving user experience.

[0075] Optionally, the air conditioner increases the frequency of the compressor and the opening of the electronic expansion valve, including: the air conditioner increases the frequency of the compressor according to the frequency change value, and increases the opening of the electronic expansion valve according to the opening change value. Specifically, the value of the frequency change value can be 1Hz. The value of the opening change value can be 1 step. In this way, if the absolute value of the temperature difference is not in the fourth temperature interval, the frequency of the compressor is increased according to a smaller frequency change value, and the opening of the electronic expansion valve is increased according to a smaller opening change value, thereby increasing the heat exchange amount between the refrigerant circulation loop and the water circulation loop, so that the absolute value of the temperature difference is stabilized in the fourth temperature interval. It is conducive to avoiding large fluctuations in the temperature difference, so that the evaporation temperature of the third heat exchanger is similar to the outlet water temperature of the third heat exchanger, which has little impact on the system, is easy to reach a steady state, and allows the system to operate in a relatively energy-saving state. It is conducive to reducing energy consumption more accurately. This is conducive to better achieving frost-free air conditioning and improving user experience.

[0076] Combination Figure 3 As shown, the embodiment of the present disclosure provides another method for controlling an air conditioner, comprising:

[0077] S301, the air conditioner determines whether the air conditioner is frosted according to the return air pressure of the compressor 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 frosted, the air conditioner adjusts the power of the water pump, the frequency of the compressor and the opening of the electronic expansion valve.

[0080] According to the method for controlling an air conditioner provided by the embodiment of the present disclosure, the refrigerant circulation system has three heat exchangers. The refrigerant circulation system and the water circulation system are designed to exchange heat in the second heat exchanger. After the heat of the compressor exhaust is provided to the second heat exchanger, it is provided to the water circulation system to defrost the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, which reduces the occurrence of compressor liquid hammer and improves the reliability of the compressor and even the system. Since the refrigerant circulation system and the water circulation system directly exchange heat in the second heat exchanger, the defrosting heat in the water circulation system is large, which improves the defrosting rate and defrosting effect. Since there is no need to switch the four-way valve to stop during the defrosting process, the energy source required for defrosting comes from the compressor and wind power, so energy can be better saved. 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 avoid frosting. At the same time, on the basis of avoiding frosting, the frequency of the compressor and the opening of the electronic expansion valve are adjusted to better reduce energy consumption, thereby taking into account both avoiding frosting and reducing energy consumption. This can increase the defrosting heat in the water circulation system and reduce energy consumption, improve the defrosting rate and effect, and help to better achieve frost-free air conditioning and improve user experience.

[0081] Combination Figure 4 As shown, the embodiment of the present disclosure provides another method for controlling an air conditioner, comprising:

[0082] S401, the air conditioner determines whether the air conditioner is frosted according to the return air pressure of the compressor 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 frosted, 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 within the first temperature range.

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

[0086] According to the method for controlling an air conditioner provided by the embodiment of the present disclosure, the refrigerant circulation system has three heat exchangers. The refrigerant circulation system and the water circulation system are designed to exchange heat in the second heat exchanger. After the heat of the compressor exhaust is provided to the second heat exchanger, it is provided to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, which reduces the occurrence of compressor liquid hammer and improves the reliability of the compressor and even the system. Since the refrigerant circulation system and the water circulation system directly exchange heat in the second heat exchanger, the defrosting heat in the water circulation system is large, which improves the defrosting rate and defrosting effect. Since there is no need to switch the four-way valve to stop during the defrosting process, the energy source required for defrosting comes from the compressor and wind power, so energy can be better saved. 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 is first adjusted according to the outlet water temperature of the third heat exchanger, and the defrosting heat in the water circulation system is more accurately increased to avoid frosting of the air conditioner. Then, according to the outlet water temperature of the third heat exchanger and the evaporation temperature of the third heat exchanger, the frequency of the compressor and the opening of the electronic expansion valve are adjusted, which is conducive to more accurately reducing energy consumption. In this way, the defrosting heat in the water circulation system is increased and the energy consumption is reduced, and the defrosting rate and defrosting effect are improved. It is conducive to better achieving frost-free air conditioning and improving user experience.

[0087] Combination Figure 5 As shown, the embodiment of the present disclosure provides a device 200 for controlling an air conditioner, including a determination module 501 and a control module 502. The determination module 501 is configured to determine whether the air conditioner is frosted according to the return air pressure of the compressor and the surface temperature of the third heat exchanger. The control module 502 is configured to control the power of the water pump, and / or the frequency of the compressor and the opening of the electronic expansion valve according to whether the air conditioner is frosted.

[0088] The device for controlling an air conditioner provided by the embodiment of the present disclosure has three heat exchangers in the refrigerant circulation system. The refrigerant circulation system and the water circulation system are designed to exchange heat in the second heat exchanger. After the heat of the compressor exhaust is provided to the second heat exchanger, it is provided to the water circulation system for defrosting the air conditioner. The high-temperature gaseous refrigerant evaporates normally and does not directly enter the compressor, which reduces the occurrence of compressor liquid hammer and improves the reliability of the compressor and even the system. Since the refrigerant circulation system and the water circulation system directly exchange heat in the second heat exchanger, the defrosting heat in the water circulation system is large, which improves the defrosting rate and defrosting effect. Since there is no need to switch the four-way valve to stop during the defrosting process, the energy source required for defrosting comes from the compressor and wind power, so energy can be better saved. According to the return air pressure of the compressor and the surface temperature of the third heat exchanger, the power of the water pump and / or the frequency of the compressor and the opening of the electronic expansion valve are controlled. In this way, the defrosting heat in the water circulation system is increased and the energy consumption is reduced, and the defrosting rate and defrosting effect are improved. It is conducive to better achieving frost-free air conditioning and improving user experience.

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

[0090] In addition, the logic instructions in the memory 601 described above 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.

[0091] The memory 601 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 600 executes the function application and data processing by running the program instructions / modules stored in the memory 601, that is, the method for controlling the air conditioner in the above embodiment is implemented.

[0092] The memory 601 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 601 may include a high-speed random access memory and may also include a non-volatile memory.

[0093] Combination Figure 7 As shown, an embodiment of the present disclosure provides an air conditioner 100, including: an air conditioner body, and the above-mentioned device 200 (300) for controlling the air conditioner. The device 200 (300) for controlling the air conditioner is installed in the air conditioner body. The installation relationship described here 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 connection, electrical connection or signal transmission connection, etc. It can be understood by those skilled in the art that the device 200 (300) for controlling the air conditioner can be adapted to a feasible air conditioner body, thereby realizing other feasible embodiments.

[0094] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling an air conditioner.

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

[0096] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0097] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, 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 part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0098] Those skilled in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0099] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0100] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. An air conditioner, characterized in that: include: A refrigerant circulation system includes a compressor, a first heat exchanger, a second heat exchanger, an electronic expansion valve, and a third heat exchanger connected in series, wherein the second heat exchanger includes a refrigerant pipeline and a water pipeline for heat exchange; The water circulation system includes a fan disk, an expansion water tank, and a water pump connected in parallel in sequence, 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 disk is connected to the outlet of the water pipeline of the second heat exchanger.

2. The air conditioner according to claim 1, characterized in that: The first heat exchanger includes a refrigerant pipeline and a water pipeline, 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 pipeline of the first heat exchanger, and the inlet of the hot water storage tank is connected to the outlet of the water pipeline of the first heat exchanger.

3. A method for controlling an air conditioner, characterized in that: The air conditioner according to claim 1 or 2 comprises: Determine whether the air conditioner is frosted based on the return air pressure of the compressor and the surface temperature of the third heat exchanger; According to 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.

4. The method according to claim 3, characterized in that: Determine whether the air conditioner is frosted based on the return air pressure of the compressor and the surface temperature of the third heat exchanger, including: When the saturation temperature corresponding to the return air pressure of the compressor is lower than the first temperature threshold, and the surface temperature of the third heat exchanger is lower than the second temperature threshold, it is determined that the air conditioner is frosted.

5. The method according to claim 3, characterized in that: 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: In case of frost on the air conditioner, adjust the power of the water pump; When the air conditioner is not frosted, adjust the power of the water pump, the frequency of the compressor and the opening of the electronic expansion valve.

6. The method according to claim 5, characterized in that Adjust the power of the water pump, including: The frequency 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 within the first temperature range.

7. A device for controlling an air conditioner, characterized in that: The air conditioner according to claim 1 or 2 comprises: a determination module configured to determine whether the air conditioner is frosted according to the return air pressure of the compressor and the surface temperature of the third heat exchanger; The control module is configured to control the power of the water pump and / or the frequency of the compressor and the opening of the electronic expansion valve according to whether the air conditioner is frosted.

8. A device for controlling an air conditioner, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling an air conditioner according to any one of claims 3 to 6 when running the program instructions.

9. An air conditioner, characterized in that: include: Air conditioner body; The device for controlling an air conditioner according to claim 7 or 8 is installed on the air conditioner body.

10. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for controlling an air conditioner according to any one of claims 3 to 6 is executed.

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