An air conditioning system and its control method

Abstract

This application provides an air conditioning system and its control method, relating to the field of air conditioning system technology. The air conditioning system includes an outdoor unit, a controller, and an indoor unit. The outdoor unit includes a compressor, a heat pipe device, and an outdoor unit heat exchanger. The heat pipe device transfers heat dissipated by the compressor to the outdoor unit heat exchanger. The controller is configured to: in response to receiving an instruction to execute a heating mode, acquire the temperature of the outdoor unit heat exchanger; acquire the temperature of a target area when the temperature of the outdoor unit heat exchanger is lower than a first preset temperature for a first preset time; if the temperature of the target area is lower than a second preset temperature, control the compressor to increase its frequency; if the compressor frequency reaches its maximum frequency, or the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a second preset time, control the outdoor unit to begin defrosting. The air conditioning system provided by this application can reduce the frequency of outdoor unit heat exchanger defrosting, thereby improving the user experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning systems, and in particular to an air conditioning system and a control method thereof. BACKGROUND

[0002] When the air conditioning system is in heating operation in winter, the working medium in the outdoor heat exchanger evaporates and absorbs heat, which reduces the temperature of the outdoor heat exchanger surface. The water vapor in the air gradually condenses on the surface of the outdoor heat exchanger, and a thick layer of frost is formed on the surface of the outdoor heat exchanger after a long time, which seriously affects the heat exchange effect of the outdoor heat exchanger and greatly reduces the heating capacity of the air conditioning system. Moreover, long-term poor heat exchange can easily damage the key components of the air conditioning system. Especially when the air conditioning system includes multiple indoor units, the impact is even greater.

[0003] In order to ensure the heat exchange efficiency of the outdoor heat exchanger and the heating performance of the air conditioning system, the air conditioning system needs to be defrosted during operation. The main defrosting method at present is to convert the heating mode to the cooling mode, that is, the compressor is stopped, the four-way valve is switched to the cooling state, and then the compressor is started to discharge hot gas into the outdoor heat exchanger for defrosting. This method needs to be switched to the cooling mode during defrosting, which can easily cause fluctuations in indoor temperature and affect the user experience. SUMMARY

[0004] The embodiments of the present application provide an air conditioning system and a control method thereof, which are used to reduce the frequency of defrosting the outdoor heat exchanger, thereby reducing the impact on the indoor temperature during the outdoor defrosting process, keeping the indoor temperature in a relatively constant state for a long time, and improving the user experience.

[0005] In a first aspect, the embodiments of the present application provide an air conditioning system, comprising: an outdoor unit, an indoor unit and a controller; the outdoor unit comprises: a compressor, a heat pipe device and an outdoor heat exchanger; one end of the heat pipe device is connected to the compressor, and the other end is connected to the outdoor heat exchanger, and is used to transmit the heat emitted by the compressor to the outdoor heat exchanger; the controller is configured to: in response to receiving an instruction to execute a heating mode, acquire the temperature of the outdoor heat exchanger; when the time for which the temperature of the outdoor heat exchanger is lower than a first preset temperature reaches a first preset time, acquire the temperature of a target area, the target area being an area between the heat pipe device and the outdoor heat exchanger; if the temperature of the target area is less than a second preset temperature, control the compressor to increase the frequency; if the frequency of the compressor reaches a maximum frequency, or the time for which the temperature of the outdoor heat exchanger is lower than the first preset temperature reaches a second preset time, control the outdoor unit to start defrosting, and the second preset time is greater than the first preset time.

[0006] The air conditioning system provided by the embodiments of the present application can delay frosting of the outdoor heat exchanger to some extent by adding a heat pipe device in the outdoor unit to transfer heat emitted by the compressor to the outdoor heat exchanger. Meanwhile, when the temperature of the outdoor heat exchanger is lower than the first preset temperature for the first preset time, that is, when the outdoor heat exchanger starts frosting or frosting reaches a certain degree, the temperature of the target area is obtained. If the temperature of the target area is less than the second preset temperature, it indicates that the heat emitted by the heat pipe device cannot melt the frost on the outdoor heat exchanger, so the frequency of the compressor is increased to increase the heat emitted by the heat pipe device, thereby increasing the temperature of the target area, so that the heat emitted by the heat pipe device can melt the frost on the outdoor heat exchanger. If the frequency of the compressor reaches the maximum frequency or the time when the temperature of the outdoor heat exchanger is lower than the first preset temperature reaches the second preset time, it indicates that defrosting cannot be performed through heat exchange of the heat pipe device, and in this case, defrosting of the outdoor unit is performed to avoid affecting the operation of the air conditioning system.

[0007] In the prior art, once the surface of the outdoor heat exchanger frosts, the outdoor unit performs defrosting, which causes the indoor (the space / environment where the indoor unit is located) temperature to fluctuate, affecting the user experience. The air conditioning system provided by the embodiments of the present application can delay frosting of the outdoor heat exchanger, thereby reducing the frequency of defrosting of the outdoor unit, and to some extent, reducing the influence of the outdoor defrosting process on the indoor (the space / environment where the indoor unit is located) temperature, so that the indoor temperature is in a relatively constant state for a long time, and the user experience is better.

[0008] With reference to the first implementation manner of the first aspect, the temperature of the target area is obtained by obtaining the ambient temperature of the outdoor unit and determining the temperature of the target area according to the recovered heat and the ambient temperature, wherein the recovered heat is the heat released by the one end of the heat pipe device close to the outdoor heat exchanger.

[0009] With reference to the second implementation manner of the first aspect, the recovered heat is related to the operating parameter of the compressor.

[0010] With reference to the third implementation manner of the first aspect, the recovered heat is related to the thermal conductivity of the heat pipe device, and the thermal conductivity is the ratio of the heat absorbed by the heat pipe device to the heat released by the compressor.

[0011] With reference to the fourth implementation manner of the first aspect, the recovered heat is related to the heat exchange efficiency of the heat pipe device, and the heat exchange efficiency is the ratio of the heat released by the one end of the heat pipe device close to the outdoor heat exchanger to the heat absorbed by the one end of the heat pipe device close to the compressor.

[0012] In conjunction with the fifth implementation method of the first aspect, the outdoor unit also includes an outdoor fan; the end of the heat pipe device near the outdoor unit heat exchanger is located at the air outlet of the outdoor fan; before determining the temperature of the target area based on the recovered heat and the ambient temperature, the controller is also configured to: read the fan speed of the outdoor fan; and determine the heat exchange efficiency based on the fan speed.

[0013] In conjunction with the sixth implementation method of the first aspect, after controlling the compressor to increase its frequency, the controller is also configured to: in response to the time when the temperature of the outdoor unit heat exchanger is greater than or equal to the first preset temperature for a third preset time, reduce the frequency of the compressor to the target frequency, where the target frequency is the frequency of the compressor when the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a first preset time.

[0014] In conjunction with the seventh implementation of the first aspect, the heat pipe device is also equipped with a solenoid valve; the controller is further configured to: in response to receiving a heating mode command, control the solenoid valve to open, so that the heat pipe device transfers the heat dissipated by the compressor to the outdoor unit heat exchanger; and in response to receiving a cooling mode command, control the solenoid valve to close, so that the heat pipe device stops transferring the heat dissipated by the compressor to the outdoor unit heat exchanger.

[0015] Secondly, embodiments of this application provide a control method for an air conditioning system. The air conditioning system includes an outdoor unit, a controller, and an indoor unit. The outdoor unit includes a compressor, a heat pipe device, and an outdoor unit heat exchanger. One end of the heat pipe device is connected to the compressor, and the other end is connected to the outdoor unit heat exchanger, for transferring heat dissipated by the compressor to the outdoor unit heat exchanger. The control method includes: in response to receiving an instruction to execute a heating mode, acquiring the temperature of the outdoor unit heat exchanger; when the temperature of the outdoor unit heat exchanger is lower than a first preset temperature for a first preset time, acquiring the temperature of a target area, the target area being the area between the heat pipe device and the outdoor unit heat exchanger; if the temperature of the target area is lower than a second preset temperature, controlling the compressor to increase its frequency, the first preset temperature being lower than the second preset temperature; if the compressor frequency reaches its maximum frequency, or the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a second preset time, controlling the outdoor unit to start defrosting, the second preset time being greater than the first preset time.

[0016] In conjunction with the first implementation method of the second aspect, the temperature of the target area is obtained, including: obtaining the ambient temperature of the outdoor unit; determining the temperature of the target area based on the recovered heat and the ambient temperature, wherein the recovered heat is the heat released by the heat pipe device near the heat exchanger of the outdoor unit, and the recovered heat is related to the operating parameters of the compressor.

[0017] Thirdly, embodiments of this application provide a controller, including: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes any of the control methods provided in the second aspect and possible implementations.

[0018] Fourthly, embodiments of this application provide a computer-readable storage medium including computer instructions that, when controlled on a computer, cause the computer to perform any of the control methods provided in the second aspect and possible implementations.

[0019] Fifthly, embodiments of the present invention provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement any of the control methods provided in the second aspect and possible implementations.

[0020] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor, or it may be packaged separately from the controller's processor; this application does not impose any limitations on this.

[0021] The beneficial effects described in aspects two through five of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0023] Figure 1 This is a schematic diagram of the structure of an air conditioning system provided in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of a refrigerant system provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of a heat pipe structure provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the structure of an outdoor unit of an air conditioning system provided in an embodiment of this application;

[0027] Figure 5 A schematic diagram of a flow path provided for an embodiment of this application;

[0028] Figure 6 A control flow for an air conditioning system controller provided in this application embodiment. Figure 1 ;

[0029] Figure 7 A control flow for an air conditioning system controller provided in this application embodiment. Figure 2 ;

[0030] Figure 8 A control flow for an air conditioning system controller provided in this application embodiment. Figure 3 ;

[0031] Figure 9 This is a schematic diagram of the structure of an outdoor unit of another air conditioning system provided in an embodiment of this application;

[0032] Figure 10 A control flow for an air conditioning system controller provided in this application embodiment. Figure 4 ;

[0033] Figure 11 A schematic diagram of the heating capacity of an air conditioning system provided in this application embodiment;

[0034] Figure 12 A method flow diagram of an air conditioning system control method provided in this application embodiment Figure 1 ;

[0035] Figure 13 A method flow diagram of an air conditioning system control method provided in this application embodiment Figure 2 ;

[0036] Figure 14 A method flow diagram of an air conditioning system control method provided in this application embodiment Figure 3 ;

[0037] Figure 15 A method flow diagram of an air conditioning system control method provided in this application embodiment Figure 4 ;

[0038] Figure 16 A method flow diagram of an air conditioning system control method provided in this application embodiment Figure 5 ;

[0039] Figure 17 This is a schematic diagram of the structure of a control device provided in an embodiment of this application;

[0040] Figure 18 This is a schematic diagram of the hardware architecture of an electronic device provided in an embodiment of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that the terms "first" and "second" used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0044] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0045] Please see Figure 1 , Figure 1 This is a schematic diagram of an air conditioning system provided as a feasible embodiment.

[0046] like Figure 1 As shown, the air conditioning system may include: outdoor unit 10, controller ( Figure 1 (Not shown in the image) and indoor unit 20. Outdoor unit 10 and indoor unit 20 can be connected via pipes, etc.

[0047] The outdoor unit 10 includes: a compressor 11, a four-way reversing valve 12, an outdoor unit heat exchanger 13, an outdoor fan 14, an outdoor unit electronic expansion valve 15, a liquid-side shut-off valve 16, a gas-side shut-off valve 17, and a gas-liquid separator 18. The indoor unit 20 includes: an indoor unit electronic expansion valve 21, an indoor unit heat exchanger 22, and an indoor fan 23.

[0048] It is worth noting that, Figure 1 This is merely an illustrative example of an air conditioning system including one indoor unit. In actual applications, this application does not impose a specific limitation on the number of indoor units included in an air conditioning system.

[0049] In some embodiments, the compressor 11 is configured between the four-way reversing valve 12 and the gas-liquid separator 18 to compress the refrigerant and input the compressed refrigerant into the circulation system via the four-way reversing valve 12 to provide power for the circulation of the refrigerant.

[0050] In some embodiments, the four ports (C, D, S, E) of the four-way reversing valve 12 are respectively connected to the exhaust port of the compressor 11 (not shown in the figure), the outdoor unit heat exchanger 13, the gas-liquid separator 18, and the indoor unit heat exchanger 22 of each indoor unit.

[0051] The four-way reversing valve 12 is used to switch between cooling and heating modes of the air conditioning system by changing the flow direction of the refrigerant in the system pipeline.

[0052] In some embodiments, one end of the outdoor unit heat exchanger 13 is connected to the compressor 11 via a four-way reversing valve 12, and the other end is connected to the indoor unit heat exchanger 22. The outdoor unit heat exchanger 13 is used to facilitate heat exchange between the refrigerant flowing in the heat transfer tubes of the outdoor unit heat exchanger 13 and the outdoor air, thereby achieving the purpose of temperature regulation.

[0053] In some embodiments, the outdoor fan 14 is connected to an outdoor fan (not shown) to drive or change the speed of the outdoor fan, so as to promote the heat exchange between the refrigerant flowing in the heat transfer tube of the outdoor unit heat exchanger 13 and the outdoor air, thereby achieving the purpose of auxiliary temperature regulation.

[0054] In some embodiments, the outdoor unit electronic expansion valve 15 and the indoor unit electronic expansion valve 21 are disposed between the indoor unit heat exchanger 22 and the outdoor unit heat exchanger 13. The outdoor unit electronic expansion valve 15 has the function of expanding and depressurizing the refrigerant flowing through it, and can be used to regulate the flow rate of the refrigerant in the pipeline. Similarly, the indoor unit electronic expansion valve 21 has the function of expanding and depressurizing the refrigerant flowing through it, and can be used to regulate the flow rate of the refrigerant in the pipeline.

[0055] In some embodiments, the liquid-side shut-off valve 16 is disposed between the outdoor unit electronic expansion valve 15 and the indoor unit electronic expansion valve 21.

[0056] In some embodiments, the gas-side shut-off valve 17 is disposed between the compressor 11 and the indoor unit heat exchanger 22.

[0057] In some embodiments, the gas-liquid separator 18 is connected to the compressor 11 and is used to separate gaseous refrigerant and liquid refrigerant.

[0058] In some embodiments, the indoor unit heat exchanger 22 is used to exchange heat between the refrigerant flowing in the heat transfer tubes of the indoor unit heat exchanger 22 and the indoor air.

[0059] In some embodiments, the indoor fan 23 is connected to an indoor fan (not shown) to drive or change the speed of the indoor fan in order to promote heat exchange between the refrigerant flowing in the heat transfer tubes of the indoor unit heat exchanger 22 and the indoor air.

[0060] The controller is the control center of the air conditioning system 100. It can be used to control the operation of each component in the air conditioning system 100 so that each component of the air conditioning system 100 can operate to realize the various functions of the air conditioning system 100.

[0061] In some embodiments, a controller refers to a device that can generate operation control signals based on instruction opcodes and timing signals, instructing the outdoor unit 10 and indoor unit 20 to execute control instructions. Exemplarily, the controller can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller can also be other devices with processing functions, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.

[0062] Those skilled in the art will understand that Figure 1 The hardware structure shown does not constitute a limitation on the air conditioning system. The air conditioning system may include more or fewer components than shown, or combine certain components, or have different component arrangements. This application does not make any specific limitations in this regard.

[0063] Please see Figure 2 , Figure 2 This is a schematic diagram of the refrigerant system in an air conditioning system. (Example:) Figure 2 As shown, the refrigerant system mainly includes four components: compressor 11, indoor unit heat exchanger 22, outdoor unit electronic expansion valve 15, indoor unit electronic expansion valve 21, and outdoor unit heat exchanger 13. These five components are connected to form a closed system, which allows the refrigerant to circulate in the closed system and complete the process of absorbing and releasing heat.

[0064] Specifically, when the air conditioning system is in heating mode, the refrigerant circulation process is as follows:Figure 2 As shown in the diagram. The solid arrows indicate the refrigerant flow direction in heating mode. Compressor 11 compresses the refrigerant from outdoor unit heat exchanger 13 and discharges the compressed refrigerant into indoor unit heat exchanger 22. The refrigerant condenses in indoor unit heat exchanger 22, releasing heat during this process. Then, the refrigerant sequentially passes through indoor unit electronic expansion valve 21, outdoor unit electronic expansion valve 15, and outdoor unit heat exchanger 13. Due to the throttling effect of the electronic expansion valves, the pressure in outdoor unit heat exchanger 13 is lower than the pressure in indoor unit heat exchanger 22. The refrigerant evaporates in outdoor unit heat exchanger 13, absorbing heat during the evaporation process, completing the cycle.

[0065] Understandably, when an air conditioning system is running in heating mode, the refrigerant in the outdoor unit's heat exchanger evaporates and absorbs heat. Over time, a thick layer of frost will form on the surface of the heat exchanger fins. To ensure the heat exchange efficiency of the outdoor unit's heat exchanger and the heating performance of the air conditioning system, defrosting is necessary when the outdoor unit's heat exchanger is frosted. During the defrosting process, the air conditioning system is actually operating in cooling mode, which will cause fluctuations in the indoor air outlet temperature, resulting in a decreased user experience.

[0066] Based on this, the air conditioning system provided in this application embodiment further includes a heat pipe device in the outdoor unit. The heat pipe device includes at least one heat pipe for transferring the heat dissipated by the compressor to the outdoor unit heat exchanger.

[0067] A heat pipe is a heat exchange element that uses the phase change of a working fluid for heat exchange. Heat pipes utilize evaporative cooling, creating a large temperature difference between their two ends, allowing for rapid heat conduction. Please refer to [link / reference]. Figure 3 , Figure 3 This is a schematic diagram of a heat pipe structure provided in an embodiment of this application. A typical heat pipe consists of a casing 31 and a wick 32. The inside of the heat pipe is evacuated to a negative pressure state and filled with a suitable liquid; this liquid has a low boiling point and is easily volatile. The casing wall has a wick made of a capillary porous material. One end of the heat pipe is the evaporation end, and the other end is the condensation end. When one end of the heat pipe is heated, the liquid in the capillary of the wick 32 evaporates rapidly. The vapor flows to the other end under a small pressure difference, releasing heat, and then condenses back into liquid. The liquid then flows back to the evaporation section along the porous material inside the wick 32 due to capillary force. This cycle continues, and heat is transferred from one end of the heat pipe to the other. This cycle is rapid, and heat can be continuously conducted. Figure 3 The middle arrow indicates the direction of heat propagation.

[0068] When an air conditioning system is running, the compressor converts electrical energy into mechanical energy by doing work, which is called active energy. Another part of the energy is consumed by the motor itself through heating, which is called reactive energy. This part of the energy is usually wasted.

[0069] Please see Figure 4 The air conditioning system provided in this application embodiment further includes a heat pipe device 19 in the outdoor unit. One end of the heat pipe device 19 is connected to the compressor 11, and the other end is connected to the outdoor unit heat exchanger 13, for transferring the heat dissipated by the compressor 11 to the outdoor unit heat exchanger 13. The heat pipe of the heat pipe device is in close contact with the compressor body to absorb the heat dissipation of the compressor. The other end of the heat pipe device 19 is placed at the outdoor unit heat exchanger 13, and the heat is released to the outdoor unit heat exchanger by the air flow brought by the outdoor fan.

[0070] Please see Figure 5 , Figure 5 This is a schematic diagram of a flow path provided for an embodiment of this application. For example... Figure 5 As shown, the heat pipe device can absorb the energy from the compressor's reactive power. Through the absorption of heat energy, the medium inside the heat pipe changes from liquid to gas, resulting in a phase change. At this time, the gas inside the heat pipe flows to the outdoor unit's heat exchanger. The cold air from outside is transformed into warm air after passing through the heat pipe device. After passing through the outdoor unit's heat exchanger, the warm air can dissolve the frost on the outdoor unit's heat exchanger, thus achieving the purpose of defrosting.

[0071] It should be understood that when the air conditioning system is running in heating mode, the outdoor unit heat exchanger will delay frost formation to some extent due to the heat exchange effect of the heat pipe device. However, since the heat output of the compressor is limited, the heat pipe device cannot guarantee that the outdoor unit heat exchanger will not frost. Therefore, further measures are needed to prevent the outdoor unit heat exchanger from frost.

[0072] Based on this, the air conditioning system provided in this application embodiment has a first temperature sensor installed on the fins of the outdoor unit heat exchanger for detecting the fin temperature. Please refer to... Figure 6 In the air conditioning system provided in this application embodiment, when a command to execute the heating mode is received, the controller is configured to execute S601-S607:

[0073] S601, Obtain fin temperature.

[0074] It should be understood that since the outdoor unit heat exchanger includes fins, frost on the outdoor unit heat exchanger is frost on the fins. Therefore, in this embodiment of the application, for ease of description, the outdoor unit heat exchanger is referred to as fin temperature.

[0075] The temperature of the outdoor unit's heat exchanger fins is obtained to determine whether the outdoor unit's heat exchanger is frosted.

[0076] S602. Determine whether the time when the fin temperature is lower than the first preset temperature has reached the first preset time.

[0077] It should be understood that the first preset temperature and the first preset time are preset by the system. In actual application, they can be set according to requirements, and the embodiments of this application do not impose any limitations on them. For example, as a feasible implementation method, the first preset temperature can be 0°C and the first preset time can be 5 minutes. If the fin temperature is below 0°C, it indicates that the outdoor unit heat exchanger is slowly frosting. Therefore, when the fin temperature is below 0°C for 5 minutes, pre-defrosting begins, i.e., S603 is executed.

[0078] If yes, it indicates that pre-defrosting is required, and S603 is executed; otherwise, return to execute S601.

[0079] S603, Obtain the temperature of the target area.

[0080] The target area is the region between the heat pipe device and the outdoor unit heat exchanger. The temperature of the target area is the temperature between the heat pipe device and the outdoor unit heat exchanger.

[0081] As a feasible implementation method, S603 can be specifically described as: acquiring the temperature of the target area at preset time intervals.

[0082] It should be understood that the preset time period is pre-set by the system, and can be set according to needs in actual application. This application embodiment does not impose any limitations on this. For example, as a feasible implementation method, the preset time period can be 30 seconds, and the temperature of the target area is acquired every 30 seconds.

[0083] As a feasible approach, a temperature sensor can be installed between the heat pipe device and the outdoor unit heat exchanger to detect the temperature between them. Therefore, step S603 specifically involves reading the temperature detected by the temperature sensor.

[0084] As another feasible approach, since outdoor units are usually equipped with temperature sensors to detect ambient temperature, the temperature of the target area can be calculated based on the ambient temperature, compressor operating efficiency, heat exchange efficiency of the heat pipe device, etc.

[0085] Please see Figure 7 S603 can be implemented as S701-S703:

[0086] S701. Determine the heat output of the compressor based on its operating parameters.

[0087] As a feasible approach, the operating parameters of the compressor can include: voltage, current, and efficiency.

[0088] Since the current and efficiency of a compressor vary at different power levels during operation, the heat generated by the compressor also varies. Therefore, the heat generated by the compressor can be determined based on its voltage, current, and efficiency.

[0089] As a feasible approach, the heat output of the compressor can be determined according to the following formula (1):

[0090] Q1=1.732*UI(1-φ)cosμ Formula (1)

[0091] Where Q1 is the heat generated by the compressor; U is the power supply voltage; I is the compressor current; φ is the compressor efficiency; and cosμ is the power factor.

[0092] It should be understood that power factor The power factor is the cosine of the phase difference between current and voltage in an AC circuit (usually the current lags behind). The higher the power factor, the higher the efficiency of electrical energy utilization. The highest power factor is 1, which means the phase difference is zero, and all electrical energy is utilized by the load; the lowest power factor is 0, which means the phase difference is 90 degrees, and all electrical energy is wasted in the line and not utilized by the load at all.

[0093] Since compressors have different efficiencies at different power levels, it's necessary to first determine the compressor's efficiency based on its power rating. This efficiency is the proportion of electrical energy converted into mechanical energy by the compressor at that power level. Therefore, 1-φ in the formula represents the proportion of electrical energy converted into heat energy by the compressor. Then, based on factors such as current and voltage, the compressor's heat output can be determined.

[0094] S702. Determine the heat recovery of the heat pipe device based on the calorific value, thermal conductivity, and heat exchange efficiency of the heat pipe device.

[0095] Since the heat generated by the compressor is not completely absorbed by the heat pipe device, there is a thermal conductivity K between the compressor and the heat pipe device, which is the ratio of the heat absorbed by the heat pipe device to the heat released by the compressor. As a feasible implementation method, the heat energy Q2 absorbed by the heat pipe device can be calculated by the following formula (2):

[0096] Q2 = K * Q1 Formula (2)

[0097] Where K is the thermal conductivity.

[0098] Because the heat exchange efficiency of a heat pipe system varies with different wind speeds and arrangements, for example, at wind speed *v*, the heat exchange efficiency is η1 for four rows of pipes, η2 for six rows, and η3 for eight rows. Therefore, the heat exchange efficiency of a heat pipe system can be determined based on the wind speed at its location and its arrangement. It should be understood that the heat exchange efficiency is the ratio of the heat released by the end of the heat pipe system near the outdoor unit's heat exchanger to the heat absorbed by the end near the compressor.

[0099] As a feasible approach, a wind speed sensor can be added next to the outdoor unit's heat exchanger to directly measure the wind speed at the location of the heat pipe assembly. Then, based on the wind speed and the arrangement of the heat pipes, the heat exchange efficiency of the heat pipe assembly can be determined.

[0100] As another feasible approach, since the structure of the outdoor unit is fixed, under normal operation, the air generated by the outdoor fan can be blown to the outdoor unit heat exchanger through the heat pipe device. Therefore, the air speed at the heat pipe device can be determined based on the rotation speed of the outdoor fan.

[0101] Please see Figure 8 S702 can be implemented as follows:

[0102] S801, Read the fan speed of the outdoor fan.

[0103] S802. Determine the heat exchange efficiency based on the fan speed.

[0104] When the outdoor unit structure is fixed, the airflow velocity at different fan speeds exhibits a certain linear relationship, and the fan speed can be directly obtained from the controller's output commands. Therefore, by establishing the correspondence between fan speed and airflow velocity, the airflow velocity at the heat exchange device can be determined. Then, based on the airflow velocity and the arrangement of the heat pipe devices, the heat exchange efficiency of the heat pipe devices can be determined.

[0105] After obtaining the heat exchange efficiency η of the heat pipe device, the recovered heat Q3 after heat exchange can be obtained according to the following formula (3):

[0106] Q3=Q2*η Formula (3)

[0107] It should be understood that the recovered heat Q3 is the heat dissipated by the heat pipe device at the outdoor unit heat exchanger.

[0108] S703. Determine the temperature of the target area based on the recovered heat and the ambient temperature.

[0109] As a feasible approach, the temperature of the target area can be determined according to the following formula (4):

[0110]

[0111] Where t2 is the temperature of the target area, i.e. the temperature between the heat pipe device and the outdoor unit heat exchanger; t1 is the air temperature before passing through the heat pipe device, i.e. the ambient temperature; V is the wind speed at the heat pipe device; ρ is the air density; and c is the specific heat capacity of the air.

[0112] It should be understood that air density and specific heat capacity are related to temperature and air pressure. For example, at 0℃ and one standard atmosphere, the density of air is 1.293 g / L, and the specific heat capacity of air is 0.24 kcal / kg℃. Therefore, air density and specific heat capacity can be determined based on the current ambient temperature and air pressure.

[0113] After obtaining the recovered heat and ambient temperature, as well as the current air density and specific heat capacity, the temperature of the target area, i.e. the temperature between the heat pipe device and the outdoor unit heat exchanger, can be determined according to formula (4).

[0114] S604. Determine whether the temperature of the target area is lower than the second preset temperature.

[0115] It should be understood that the second preset temperature is preset by the system and is greater than the first preset temperature. In practical applications, it can be set according to requirements, and this application embodiment does not impose any limitations on it. For example, as a feasible implementation method, the second preset temperature is 20°C, and the system determines whether the temperature of the target area is less than 20°C.

[0116] As can be seen, the second preset temperature is the basis for determining whether the heat pipe device can defrost. If the temperature of the target area is greater than or equal to the second preset temperature, it means that the heat emitted by the heat pipe device can dissolve the frost on the fins of the outdoor unit heat exchanger, and the process returns to execute S603; if the temperature of the target area is less than the second preset temperature, it means that the heat emitted by the heat pipe device cannot dissolve the frost on the fins of the outdoor unit heat exchanger, and the temperature of the target area needs to be increased, i.e., the process executes S605.

[0117] S605, controls the compressor to increase frequency.

[0118] If the temperature of the target area is lower than the second preset temperature, it means that the heat emitted by the heat pipe device cannot dissolve the frost on the fins of the outdoor unit heat exchanger. Therefore, the compressor is controlled to increase the preset frequency, which increases the heat output of the compressor and thus raises the temperature of the target area, making the temperature of the target area higher than the second preset temperature.

[0119] As a feasible implementation method, S605 can specifically be: controlling the compressor to increase the preset frequency.

[0120] It should be understood that the preset frequency is pre-set by the system, and can be set according to requirements in actual applications. This application embodiment does not impose any limitations on this. For example, as a feasible implementation method, the preset frequency can be 5Hz. If the temperature of the target area is lower than the second preset temperature, the frequency of the compressor is increased by 5Hz.

[0121] S606. Determine whether the compressor frequency has reached the maximum frequency, or whether the fin temperature has been below the first preset temperature for a period of time that has reached the second preset time.

[0122] It should be understood that the second preset time is pre-set by the system and is longer than the first preset time. In actual application, it can be set according to requirements, and this application embodiment does not impose any limitations on it. For example, as a feasible implementation method, the second preset time is 10 minutes, and the system determines whether the fin temperature has been lower than the first preset temperature for 10 minutes.

[0123] If the temperature of the target area has not reached the second preset temperature when the compressor frequency reaches the maximum frequency, it indicates that the frost on the outdoor unit heat exchanger cannot be dissolved through heat exchange via the heat pipe device. Therefore, when the compressor frequency reaches the maximum frequency, S607 is executed.

[0124] If the fin temperature is below the first preset temperature for a period of time that reaches the second preset time, it indicates that the outdoor unit heat exchanger has been severely frosted and cannot be defrosted through heat exchange via the heat pipe device. Therefore, when the fin temperature is below the first preset temperature for a period of time that reaches the second preset time, S607 is executed.

[0125] If the compressor frequency does not reach the maximum frequency and the fin temperature is below the first preset temperature for less than the second preset time, it indicates that heat exchange can be performed through the heat pipe device, and the process returns to execution S603.

[0126] S607, Control the outdoor unit to start defrosting.

[0127] When the compressor reaches its maximum frequency, or when the fin temperature remains below the first preset temperature for a period of time exceeding the second preset time, it indicates that defrosting cannot be achieved through heat exchange via the heat pipe system. Conventional defrosting methods must be used, such as stopping the compressor, switching the four-way valve to cooling mode, and then restarting the compressor to discharge hot air into the outdoor unit's heat exchanger for defrosting. This prevents prolonged operation of the air conditioning system with frosting buildup, which could damage components.

[0128] The air conditioning system provided in this application embodiment adds a heat pipe device inside the outdoor unit to transfer the heat dissipated by the compressor to the outdoor unit heat exchanger, which can delay the frosting of the outdoor unit heat exchanger to a certain extent. Simultaneously, when the temperature of the outdoor unit heat exchanger is lower than a first preset temperature for a first preset time period, i.e., when the outdoor unit heat exchanger begins to frost or the frost reaches a certain level, the temperature of the target area is obtained. If the temperature of the target area is lower than a second preset temperature, it indicates that the heat dissipated by the heat pipe device cannot dissolve the frost on the outdoor unit heat exchanger. Therefore, the compressor frequency is increased to increase the heat dissipated by the heat pipe device, thereby raising the temperature of the target area so that the heat dissipated by the heat pipe device can dissolve the frost on the outdoor unit heat exchanger. If the compressor frequency reaches its maximum frequency, or the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a second preset time period, it indicates that defrosting cannot be performed through heat exchange via the heat pipe device. In this case, outdoor unit defrosting is used to avoid affecting the operation of the air conditioning system.

[0129] In existing solutions, once frost forms on the surface of the outdoor unit's heat exchanger, the outdoor unit defrosts. During this defrosting process, the indoor temperature fluctuates, affecting the user experience. The air conditioning system provided in this application delays frost formation on the outdoor unit's heat exchanger, thereby reducing the frequency of outdoor unit defrosting. This reduces the impact of outdoor unit defrosting on the indoor temperature, allowing the indoor temperature to remain relatively constant for a longer period, resulting in a better user experience.

[0130] In some embodiments, when the air conditioning system is operating in heating mode, the outdoor unit heat exchanger needs to absorb heat. In cooling mode, the outdoor unit heat exchanger needs to dissipate heat. Since the heat pipe device is the heat absorption end at the compressor section and the heat release end at the outdoor unit heat exchanger, to avoid the heat pipe device affecting the heat release of the outdoor unit heat exchanger in cooling mode, please refer to [link to relevant documentation]. Figure 9 A solenoid valve 191 can be installed on the heat pipe device 19. When the air conditioning system is running in heating mode, the solenoid valve 191 is opened, and when the air conditioning system is running in cooling mode, the solenoid valve 191 is closed.

[0131] As one feasible approach, please refer to Figure 10 The controller is also configured to perform the following steps:

[0132] S1001, in response to receiving the heating mode command, controls the solenoid valve to open, so that the heat pipe device transfers the heat dissipated by the compressor to the outdoor unit heat exchanger.

[0133] S1002, in response to receiving the command for cooling mode, controls the solenoid valve to close, so that the heat pipe device stops transferring the heat dissipated by the compressor to the outdoor unit heat exchanger.

[0134] When the solenoid valve is open in heating mode, the medium within the heat pipe device can flow, allowing the heat pipe device to transfer heat dissipated by the compressor to the outdoor unit's heat exchanger, thus delaying frost formation on the outdoor unit's heat exchanger. When the solenoid valve is closed in cooling mode, the medium within the heat pipe device stops flowing, preventing the heat pipe device from transferring heat dissipated by the compressor to the outdoor unit's heat exchanger, thus avoiding any impact on the heat dissipation of the outdoor unit's heat exchanger.

[0135] In some embodiments, the compressor frequency has a significant impact on the heating capacity during heating mode, such as... Figure 11 As shown, with the increase of compressor operating frequency, compressor speed increases, refrigerant flow increases, and heating capacity also increases. However, this increase is not continuous. As the operating frequency increases, when the refrigerant flow reaches heat exchange saturation, insufficient heat exchange occurs, and the heating capacity gradually decreases. In other words, increasing the compressor frequency leads to fluctuations in heating capacity, which in turn causes fluctuations in indoor temperature, affecting the user experience.

[0136] As a feasible implementation method, after controlling the compressor to increase the preset frequency, the controller is also configured to: reduce the compressor frequency to the target frequency in response to the time when the fin temperature is greater than or equal to the first preset temperature reaching the third preset time.

[0137] The target frequency is the compressor frequency when the fin temperature remains below the first preset temperature for a specified period of time. In other words, it is the operating frequency of the compressor before it increases its frequency.

[0138] When the fin temperature is greater than or equal to the first preset temperature for a period of time until the third preset time is reached, it indicates that the frost on the outdoor unit heat exchanger has been completely cleared and defrosting is not required. Then, the compressor frequency is reduced to the target frequency, which means the compressor frequency is restored to the operating frequency before the frequency was increased. This avoids fluctuations in heating capacity caused by prolonged high-frequency operation of the compressor, which would affect the user experience.

[0139] This application also provides a control method for an air conditioning system, applicable to the aforementioned air conditioning system. Please refer to... Figure 12 The control method includes the following steps:

[0140] S1201: In response to receiving a command to execute the heating mode, obtain the temperature of the outdoor unit heat exchanger.

[0141] S1202. When the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a period of time, the temperature of the target area is obtained.

[0142] The target area is the area between the heat pipe device and the outdoor unit heat exchanger.

[0143] As one feasible approach, please refer to Figure 13 To obtain the temperature of the target area, the following steps are included:

[0144] S1301, Obtain the ambient temperature of the outdoor unit.

[0145] S1302. Determine the temperature of the target area based on the recovered heat and the ambient temperature.

[0146] The recovered heat refers to the heat released by the end of the heat pipe device near the outdoor unit's heat exchanger.

[0147] As a feasible approach, heat recovery is related to the operating parameters of the compressor.

[0148] As a feasible approach, heat recovery is related to the thermal conductivity of the heat pipe device, which is the ratio of the heat absorbed by the heat pipe device to the heat released by the compressor.

[0149] As a feasible approach, heat recovery is related to the heat exchange efficiency of the heat pipe device, which is the ratio of the heat released by the end of the heat pipe device near the outdoor unit heat exchanger to the heat absorbed by the end of the heat pipe device near the compressor.

[0150] As another feasible implementation method, please refer to Figure 14 To obtain the temperature of the target area, the following steps are included:

[0151] S1401. Determine the heat output of the compressor based on its operating parameters.

[0152] As a feasible approach, the operating parameters of the compressor can include: voltage, current, and efficiency.

[0153] Since the current and efficiency of a compressor vary at different power levels during operation, the heat generated by the compressor also varies. Therefore, the heat generated by the compressor can be determined based on its voltage, current, and efficiency. As a feasible approach, the heat generated by the compressor can be determined using the following formula (1):

[0154] Q1=1.732*UI(1-φ)cosμ Formula (1)

[0155] Where Q1 is the heat generated by the compressor; U is the power supply voltage; I is the compressor current; φ is the compressor efficiency; and cosμ is the power factor.

[0156] S1402. Determine the heat recovery of the heat pipe device based on the calorific value, thermal conductivity, and heat exchange efficiency of the heat pipe device.

[0157] Since the heat generated by the compressor is not completely absorbed by the heat pipe device, there is a thermal conductivity K between the compressor and the heat pipe device, which is the ratio of the heat absorbed by the heat pipe device to the heat released by the compressor. As a feasible implementation method, the heat energy Q2 absorbed by the heat pipe device can be calculated by the following formula (2):

[0158] Q2 = K * Q1 Formula (2)

[0159] Where K is the thermal conductivity.

[0160] Because the heat exchange efficiency of a heat pipe system varies with different wind speeds and arrangements, for example, at wind speed *v*, the heat exchange efficiency is η1 for four rows of pipes, η2 for six rows, and η3 for eight rows. Therefore, the heat exchange efficiency of a heat pipe system can be determined based on the wind speed at its location and its arrangement. It should be understood that the heat exchange efficiency is the ratio of the heat released by the end of the heat pipe system near the outdoor unit's heat exchanger to the heat absorbed by the end near the compressor.

[0161] As a feasible implementation method, the outdoor unit also includes an outdoor fan; the end of the heat pipe device near the outdoor unit's heat exchanger is located at the air outlet of the outdoor fan; please refer to... Figure 15 The control methods also include:

[0162] S1501, Read the fan speed of the outdoor fan.

[0163] S1502. Determine the heat exchange efficiency based on the fan speed.

[0164] When the outdoor unit structure is fixed, the airflow velocity at different fan speeds exhibits a certain linear relationship, and the fan speed can be directly obtained from the controller's output commands. Therefore, by establishing the correspondence between fan speed and airflow velocity, the airflow velocity at the heat exchange device can be determined. Then, based on the airflow velocity and the arrangement of the heat pipe devices, the heat exchange efficiency of the heat pipe devices can be determined.

[0165] After obtaining the heat exchange efficiency η of the heat pipe device, the recovered heat Q3 after heat exchange can be obtained according to the following formula (3):

[0166] Q3=Q2*η Formula (3)

[0167] It should be understood that the recovered heat Q3 is the heat dissipated by the heat pipe device at the outdoor unit heat exchanger.

[0168] S1403. Determine the temperature of the target area based on the recovered heat and the ambient temperature.

[0169] As a feasible approach, the temperature of the target area can be determined according to the following formula (4):

[0170]

[0171] Where t2 is the temperature of the target area, i.e. the temperature between the heat pipe device and the outdoor unit heat exchanger; t1 is the air temperature before passing through the heat pipe device, i.e. the ambient temperature; V is the wind speed at the heat pipe device; ρ is the air density; and c is the specific heat capacity of the air.

[0172] It should be understood that air density and specific heat capacity are related to temperature and air pressure. For example, at 0℃ and one standard atmosphere, the density of air is 1.293 g / L, and the specific heat capacity of air is 0.24 kcal / kg℃. Therefore, air density and specific heat capacity can be determined based on the current ambient temperature and air pressure.

[0173] After obtaining the recovered heat and ambient temperature, as well as the current air density and specific heat capacity, the temperature of the target area, i.e. the temperature between the heat pipe device and the outdoor unit heat exchanger, can be determined according to formula (4).

[0174] S1203. If the temperature of the target area is lower than the second preset temperature, control the compressor to increase the frequency.

[0175] The first preset temperature is lower than the second preset temperature.

[0176] S1204. If the compressor frequency reaches the maximum frequency, or the outdoor unit heat exchanger temperature is lower than the first preset temperature for a period of time that reaches the second preset time, control the outdoor unit to start defrosting.

[0177] The second preset time is longer than the first preset time.

[0178] As a feasible implementation method, after controlling the compressor to increase its frequency, the control method also includes:

[0179] In response to the outdoor unit heat exchanger temperature being greater than or equal to the first preset temperature for a third preset time, the compressor frequency is reduced to the target frequency, which is the compressor frequency when the outdoor unit heat exchanger temperature is lower than the first preset temperature for a first preset time.

[0180] As a feasible implementation method, a solenoid valve is also installed on the heat pipe device; please refer to Figure 16 The control methods also include:

[0181] S1601, in response to receiving a command for heating mode, controls the solenoid valve to open, so that the heat pipe device transfers the heat dissipated by the compressor to the outdoor unit heat exchanger.

[0182] S1602, in response to receiving a command for cooling mode, controls the solenoid valve to close, causing the heat pipe device to stop transferring the heat dissipated by the compressor to the outdoor unit heat exchanger.

[0183] This application also provides a control device for an air conditioning system; please refer to [link / reference]. Figure 17 The control device 170 includes: an acquisition module 171 for acquiring the temperature of the outdoor unit heat exchanger; the acquisition module 171 is also used to acquire the temperature of a target area when the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a first preset time, the target area being the area between the heat pipe device and the outdoor unit heat exchanger; a control module 172 for controlling the compressor to increase its frequency; the control module 172 is also used to control the outdoor unit to start defrosting when the compressor frequency reaches its maximum frequency, or when the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a second preset time, the second preset time being longer than the first preset time.

[0184] This application also provides an electronic device; please refer to [link / reference]. Figure 18 The electronic device 180 includes: one or more processors 1801; one or more memories 1802, wherein the one or more memories 1802 are used to store computer program code, the computer program code including computer instructions; when the one or more processors 1801 execute the computer instructions, the electronic device 180 performs the various steps of the method shown in the above method embodiments.

[0185] This application also provides a computer-readable storage medium storing computer instructions that, when executed on an electronic device, cause the electronic device to perform each step of the method flow shown in the above method embodiments.

[0186] This application also provides a computer program product, which includes computer instructions that, when executed on an electronic device, cause the electronic device to perform each step of the method flow shown in the above method embodiments.

[0187] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device including one or more servers, data centers, etc., that can be integrated with the medium. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0188] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air conditioning system, characterized in that, include: Outdoor unit, indoor unit, and controller; The outdoor unit includes: a compressor, a heat pipe device, and an outdoor unit heat exchanger; One end of the heat pipe device is connected to the compressor, and the other end is connected to the outdoor unit heat exchanger, for transferring the heat dissipated by the compressor to the outdoor unit heat exchanger. The controller is configured to: In response to receiving a command to execute the heating mode, the temperature of the outdoor unit heat exchanger is obtained; When the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a period of time, the temperature of the target area is obtained, wherein the target area is the area between the heat pipe device and the outdoor unit heat exchanger. If the temperature of the target area is lower than the second preset temperature, control the compressor to increase its frequency; If the compressor frequency reaches its maximum frequency, or the outdoor unit heat exchanger temperature is lower than the first preset temperature for a period of time that is lower than the first preset temperature for a period of time that is lower than the second preset time, the outdoor unit is controlled to start defrosting, and the second preset time is greater than the first preset time.

2. The air conditioning system according to claim 1, characterized in that, The acquisition of the temperature of the target area includes: Obtain the ambient temperature of the outdoor unit; The temperature of the target area is determined based on the recovered heat and the ambient temperature, wherein the recovered heat is the heat released by the heat pipe device near the outdoor unit heat exchanger.

3. The air conditioning system according to claim 2, characterized in that, The recovered heat is related to the operating parameters of the compressor.

4. The air conditioning system according to claim 3, characterized in that, The recovered heat is related to the thermal conductivity of the heat pipe device, which is the ratio of the heat absorbed by the heat pipe device to the heat released by the compressor.

5. The air conditioning system according to claim 4, characterized in that, The recovered heat is related to the heat exchange efficiency of the heat pipe device, which is the ratio of the heat released by the end of the heat pipe device near the outdoor unit heat exchanger to the heat absorbed by the end of the heat pipe device near the compressor.

6. The air conditioning system according to claim 5, characterized in that, The outdoor unit also includes an outdoor fan; the air outlet of the outdoor fan faces the end of the heat pipe device near the heat exchanger of the outdoor unit. Before determining the temperature of the target area based on the recovered heat and the ambient temperature, the controller is further configured to: Read the fan speed of the outdoor fan; The heat exchange efficiency is determined based on the fan speed.

7. The air conditioning system according to any one of claims 1-6, characterized in that, After controlling the compressor to increase its frequency, the controller is further configured to: In response to a third preset time when the temperature of the outdoor unit heat exchanger is greater than or equal to the first preset temperature, the frequency of the compressor is reduced to a target frequency, where the target frequency is the frequency of the compressor when the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a period of time.

8. The air conditioning system according to claim 7, characterized in that, The heat pipe device is also equipped with a solenoid valve; The controller is also configured to: In response to receiving a heating mode command, the solenoid valve is opened, so that the heat pipe device transfers the heat dissipated by the compressor to the outdoor unit heat exchanger. In response to receiving a command for cooling mode, the solenoid valve is controlled to close, causing the heat pipe device to stop transferring the heat dissipated by the compressor to the outdoor unit heat exchanger.

9. A control method for an air conditioning system, characterized in that, The air conditioning system includes: an outdoor unit, a controller, and an indoor unit; The outdoor unit includes: a compressor, a heat pipe device, and an outdoor unit heat exchanger; One end of the heat pipe device is connected to the compressor, and the other end is connected to the outdoor unit heat exchanger, for transferring the heat dissipated by the compressor to the outdoor unit heat exchanger. The control method includes: In response to receiving a command to execute the heating mode, the temperature of the outdoor unit heat exchanger is obtained; When the temperature of the outdoor unit heat exchanger is lower than the first preset temperature for a period of time, the temperature of the target area is obtained, wherein the target area is the area between the heat pipe device and the outdoor unit heat exchanger. If the temperature of the target area is lower than the second preset temperature, the compressor frequency is increased, and the first preset temperature is lower than the second preset temperature. If the compressor frequency reaches its maximum frequency, or the outdoor unit heat exchanger temperature is lower than the first preset temperature for a period of time that is lower than the first preset temperature for a period of time that is lower than the second preset time, the outdoor unit is controlled to start defrosting, and the second preset time is greater than the first preset time.

10. The control method according to claim 9, characterized in that, The acquisition of the temperature of the target area includes: Obtain the ambient temperature of the outdoor unit; The temperature of the target area is determined based on the recovered heat and the ambient temperature. The recovered heat is the heat released by the heat pipe device near the outdoor unit heat exchanger, and the recovered heat is related to the operating parameters of the compressor.

Images