Air conditioning system and anti-condensation control method and controller thereof

Abstract

The invention discloses an air conditioning system, an anti-condensation control method thereof and a controller, and the air conditioning system comprises a refrigerant heat dissipation assembly, an expansion valve, a target temperature sensor and the controller. The refrigerant heat dissipation assembly is connected with a refrigerant circulating pipeline of the air conditioner system so that a refrigerant can be led out of the refrigerant circulating pipeline to dissipate heat of a main control board of the air conditioner system. One end of the expansion valve is connected with the outdoor heat exchanger, and the other end is connected with the refrigerant radiating assembly; the target temperature sensor is arranged between the expansion valve and the refrigerant heat dissipation assembly; the controller is used for obtaining the detection temperature of the target temperature sensor, determining the target dew point temperature according to the outdoor environment temperature and increasing the opening degree of the expansion valve so that the detection temperature can be larger than the target dew point temperature. According to the air conditioning system, condensation can be prevented from being generated on the refrigerant heat dissipation assembly, and reliable operation of the main control board is guaranteed.

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 an anti-condensation control method and a controller thereof. Background Art

[0002] The load of the air conditioner is large when cooling at high temperature, and the current flowing through the main control board is large. The main control board is prone to overheating and current limiting, which leads to a decrease in the high temperature cooling capacity of the air conditioner. Some air conditioners lead a short refrigerant pipe in the refrigerant circulation system to pass through the main control board, and dissipate heat for the main control board through the refrigerant short pipe, thereby improving the high temperature cooling capacity.

[0003] The refrigerant short pipe is between the one-way throttle valve and the expansion valve. In order to ensure the cooling and defrosting effects, in the cooling mode and defrosting mode, the refrigerant flows through the expansion valve, the refrigerant short pipe and the one-way throttle valve in sequence. At this time, the direction of the one-way throttle valve is the same as the flow direction of the refrigerant to prevent the one-way throttle valve from affecting the refrigerant flow in the cooling mode and defrosting mode. However, the expansion valve upstream of the refrigerant short pipe produces throttling, which makes the temperature of the refrigerant short pipe low. In the defrosting mode, condensed water is easily generated on the refrigerant short pipe, which may cause water ingress and damage to the electronic components of the main control board. Summary of the invention

[0004] The embodiment of the present application provides an air conditioning system and an anti-condensation control method and a controller thereof, which can prevent condensation from occurring on a refrigerant heat dissipation component flowing through a main control board.

[0005] In a first aspect, an embodiment of the present application provides an air conditioning system, comprising:

[0006] A refrigerant heat dissipation component, connected to a refrigerant circulation pipeline of the air conditioning system, so as to draw out refrigerant in the refrigerant circulation pipeline to dissipate heat for a main control board of the air conditioning system;

[0007] An expansion valve, one end of which is connected to the outdoor heat exchanger, and the other end of which is connected to the refrigerant heat dissipation component;

[0008] A target temperature sensor is arranged between the expansion valve and the refrigerant heat dissipation component;

[0009] The controller is used to obtain the detection temperature of the target temperature sensor, determine the target dew point temperature according to the outdoor ambient temperature, and increase the opening of the expansion valve so that the detection temperature is greater than the target dew point temperature.

[0010] In some embodiments, the air conditioning system further includes a one-way throttle valve, which is disposed between the refrigerant heat dissipation component and the indoor heat exchanger, and the direction of the one-way throttle valve is toward the indoor heat exchanger.

[0011] In some embodiments, the air conditioning system further includes a high-pressure valve disposed between the indoor heat exchanger and the one-way throttle valve.

[0012] In a second aspect, an embodiment of the present application provides an anti-condensation control method, which is applied to the air conditioning system as described in the embodiment of the first aspect, and the anti-condensation control method includes:

[0013] Acquire the detection temperature of the target temperature sensor, and determine the target dew point temperature according to the outdoor ambient temperature;

[0014] The opening degree of the expansion valve is increased so that the detected temperature is greater than the target dew point temperature.

[0015] In some embodiments, determining the target dew point temperature according to the outdoor ambient temperature includes:

[0016] determining an outdoor air dry-bulb temperature according to the outdoor ambient temperature;

[0017] The corresponding target dew point temperature is determined according to the outdoor air dry-bulb temperature.

[0018] In some embodiments, increasing the opening of the expansion valve so that the detected temperature is greater than the target dew point temperature includes:

[0019] Subtracting the target dew point temperature from the detected temperature to obtain a temperature difference;

[0020] When the temperature difference is less than a preset temperature value, increasing the opening of the expansion valve;

[0021] Wherein, the preset temperature value is greater than 0.

[0022] In some embodiments, increasing the opening of the expansion valve includes:

[0023] increasing the current opening of the expansion valve according to a preset opening;

[0024] After a preset time period, the detected temperature is obtained and the temperature difference is re-determined;

[0025] When the temperature difference is less than a preset temperature value, the opening of the expansion valve is increased again according to the preset opening.

[0026] In some embodiments, the preset temperature value is 1 degree Celsius.

[0027] In the third aspect, an embodiment of the present application provides a controller comprising at least one processor and a memory for communicating with the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the anti-condensation control method as described in the embodiment of the second aspect.

[0028] In a fourth aspect, an embodiment of the present application provides an air-conditioning system, comprising a controller as described in the embodiment of the third aspect.

[0029] The air-conditioning system and its anti-condensation control method and controller of the embodiment of the present application have at least the following beneficial effects: the embodiment of the present application sets an auxiliary anti-condensation temperature sensor between the expansion valve and the refrigerant heat dissipation component, and according to the detection temperature of the temperature sensor and the determined target dew point temperature, increases the opening of the expansion valve to increase the temperature of the refrigerant flowing through the refrigerant heat dissipation component, so that the refrigerant temperature is greater than the target dew point temperature, thereby avoiding condensation on the refrigerant heat dissipation component and ensuring the reliable operation of the main control board.

[0030] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural schematic diagram of an air conditioning system provided in an embodiment of the present application;

[0032] Figure 2 is a flow chart of the anti-condensation control method provided in an embodiment of the present application;

[0033] Figure 3 is a flow chart of determining a target dew point temperature according to an outdoor ambient temperature provided in an embodiment of the present application;

[0034] Figure 4 It is a schematic diagram of the relationship between dew point temperature provided in the embodiment of the present application;

[0035] Figure 5 is a flow chart of increasing the opening of the expansion valve so that the detected temperature is greater than the target dew point temperature provided by an embodiment of the present application;

[0036] Figure 6 It is a flow chart of increasing the opening of the expansion valve provided in an embodiment of the present application.

[0037] Reference numerals:

[0038] 110. refrigerant heat dissipation component; 120. expansion valve; 130. target temperature sensor;

[0039] 200, one-way throttle valve;

[0040] 300, high pressure valve;

[0041] 400. Compressor;

[0042] 500, four-way valve assembly;

[0043] 600, outdoor heat exchanger;

[0044] 700, indoor heat exchanger;

[0045] 800. Low pressure valve. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the accompanying drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0047] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0048] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0049] The existing thin frost quick melting technology has been applied in batches on air-cooled heat dissipation products. Because it has a more obvious effect on improving the comfort of the defrosting stage during heating operation, this technology is extended to models with refrigerant ring heat dissipation for application in a wider range of products. At present, the outdoor machine refrigeration system of the refrigerant ring heat dissipation model consists of a short tube throttle valve, a refrigerant heat dissipation component 110, an expansion valve 120, a compressor 400, a heat exchanger, etc. In order to prevent condensed water from being generated on the pipeline of the refrigerant heat dissipation component 110 under high temperature and high humidity conditions, which affects the safety and reliability of the electronic control components, in the cooling operation mode, the high-temperature and high-pressure refrigerant flowing out of the outdoor unit condenser first passes through the short tube throttle valve in reverse. At this time, the short tube throttle valve has no throttling effect, and then dissipates heat to the power device through the refrigerant heat dissipation component 110, enters the expansion valve 120, and after throttling and reducing the pressure, enters the indoor unit heat exchanger for evaporation and heat absorption to achieve a cooling effect.

[0050] However, the configuration of the existing refrigerant ring heat dissipation model cannot meet the needs of the thin frost fast melting function. The reason is that when performing thin frost fast melting, the short tube throttle valve will limit the refrigerant flow, seriously affecting the defrosting effect. Therefore, it is necessary to swap the installation positions of the short tube throttle valve and the expansion valve 120 in the pipeline to give play to the advantages of the thin frost fast melting technology, but at the same time, the expansion valve 120 will be located upstream of the refrigerant heat dissipation component 110, and throttling will occur during refrigeration operation, which will cause condensation water to form on the refrigerant heat dissipation component 110.

[0051] Based on this, an embodiment of the present application provides an air-conditioning system and its anti-condensation control method and controller, so that in order to ensure the quick melting effect of thin frost, when the expansion valve 120 is set upstream of the refrigerant heat dissipation component 110 in the pipeline, condensation can still be prevented from occurring in the refrigerant heat dissipation component 110 flowing through the main control board.

[0052] The following is an explanation of the air conditioning system and its anti-condensation control method and controller in conjunction with the accompanying drawings:

[0053] Reference Figure 1 As shown, an air conditioning system provided in an embodiment of the present application includes:

[0054] The refrigerant heat dissipation component 110 is connected to the refrigerant circulation pipeline of the air conditioning system to draw out the refrigerant in the refrigerant circulation pipeline to dissipate the heat for the main control board of the air conditioning system;

[0055] An expansion valve 120, one end of the expansion valve 120 is connected to the outdoor heat exchanger 600, and the other end is connected to the refrigerant heat dissipation component 110;

[0056] The target temperature sensor 130 is disposed between the expansion valve 120 and the refrigerant heat dissipation component 110;

[0057] The controller is used to obtain the detected temperature of the target temperature sensor 130, determine the target dew point temperature according to the outdoor ambient temperature, and increase the opening of the expansion valve 120 so that the detected temperature is greater than the target dew point temperature.

[0058] It should be noted that Figure 1 The schematic diagram of the structure of the air conditioning system of an embodiment of the present invention, in which the arrow direction represents the flow direction of the refrigerant in the system when the cooling mode is running. In the system pipeline, the expansion valve 120 is arranged upstream of the refrigerant heat dissipation component 110, so that the refrigerant flows through the expansion valve 120 and the refrigerant heat dissipation component 110 in sequence. Specifically, the refrigerant enters the outdoor heat exchanger 600, is cooled to become a high-pressure medium-temperature saturated or supercooled liquid, and then enters the refrigerant heat dissipation component 110 after throttling and reducing the pressure through the expansion valve 120, thereby outputting the refrigerant to the main control board for heat dissipation.

[0059] Since the expansion valve 120 is located upstream of the refrigerant ring heat dissipation device, when operating in the cooling mode or the defrosting mode, the throttling and pressure reduction effect of the expansion valve 120 will make the temperature of the refrigerant entering the refrigerant heat dissipation component 110 lower than the air dew point temperature, causing condensation in the pipeline and affecting the operating reliability of the electronic control components. Therefore, it can be understood that the embodiment of the present invention is provided with a target temperature sensor 130 on the connecting pipeline between the expansion valve 120 and the refrigerant heat dissipation component 110 to collect the temperature of the section of the pipeline before the refrigerant enters the refrigerant heat dissipation component 110. And by reasonably controlling the temperature, the generation of condensation can be prevented.

[0060] Furthermore, the controller controls the opening of the expansion valve 120 by obtaining the detection temperature collected by the target temperature sensor 130 and determining the target dew point temperature according to the outdoor ambient temperature so that the detection temperature is greater than the target dew point temperature, thereby ensuring that the temperature of the section of the pipeline before the refrigerant enters the refrigerant heat dissipation component 110 is not too low to form condensed water, thereby preventing the main control board from being affected by condensed water and causing failure.

[0061] Specifically, in some embodiments, the refrigerant heat dissipation component 110 can adopt a refrigerant ring radiator; the expansion valve 120 can adopt an electronic expansion valve 120; the target temperature sensor 130 can adopt a contact temperature sensor; the controller can adopt a single-chip microcomputer, DSP or ARM, and specifically can use an STM32 series processor.

[0062] It is worth noting that the target temperature sensor 130 does not have to be set on the connecting pipe between the expansion valve 120 and the refrigerant heat dissipation component 110. The target temperature sensor 130 can also adopt a non-contact temperature sensor. It only needs to ensure that the collected temperature can accurately reflect the temperature of the section of the pipe before the refrigerant enters the refrigerant heat dissipation component 110.

[0063] In this embodiment, an auxiliary anti-condensation temperature sensor is provided between the expansion valve 120 and the refrigerant heat dissipation component 110. According to the detection temperature of the temperature sensor and the determined target dew point temperature, the temperature of the refrigerant flowing through the refrigerant heat dissipation component 110 is increased by increasing the opening of the expansion valve 120, so that the refrigerant temperature is greater than the target dew point temperature, thereby avoiding the generation of condensation on the refrigerant heat dissipation component 110 and ensuring the reliable operation of the main control board.

[0064] In some embodiments, the air conditioning system further includes a one-way throttle valve 200 , which is disposed between the refrigerant heat dissipation assembly 110 and the indoor heat exchanger 700 , and the direction of the one-way throttle valve 200 is directed toward the indoor heat exchanger 700 .

[0065] refer to Figure 1 ,from Figure 1 It can be seen that one end of the one-way throttle valve 200 is connected to the refrigerant heat dissipation component 110, and the other end is connected to the indoor heat exchanger 700. Specifically, the one-way throttle valve 200 is a short-tube throttle valve (or a throttling short tube). After the refrigerant enters the refrigerant heat dissipation component 110 to dissipate heat to the main control board and other electronic control devices, the refrigerant will continue to pass through the one-way throttle valve 200 for secondary throttling and pressure reduction to a low-temperature and low-pressure saturated state, so that it can subsequently enter the indoor heat exchanger 700 for evaporation and heat absorption to become a low-pressure and low-temperature gas state.

[0066] In some embodiments, the air conditioning system further includes a high-pressure valve 300 , which is disposed between the indoor heat exchanger 700 and the one-way throttle valve 200 .

[0067] refer to Figure 1 ,from Figure 1 It can be seen that one end of the high-pressure valve 300 is connected to the one-way throttle valve 200, and the other end is connected to the indoor heat exchanger 700. Specifically, by setting the high-pressure valve 300, on the one hand, the flow of the refrigerant entering the indoor heat exchanger 700 can be adjusted, and on the other hand, when the pipeline pressure is too high, it can be automatically closed to avoid safety accidents such as explosion of the air-conditioning system, thereby protecting and extending the life of the air-conditioning.

[0068] In some embodiments, the air conditioning system further includes: a compressor 400, a four-way valve assembly 500, an outdoor heat exchanger 600, an indoor heat exchanger 700 and a low-pressure valve 800. Specifically, refer to Figure 1 ,from Figure 1It can be seen that one end of the indoor heat exchanger 700 is connected to the other end of the high-pressure valve 300, and the other end is connected to one end of the low-pressure valve 800; the other end of the low-pressure valve 800 is connected to the first port of the four-way valve assembly 500; the second port of the four-way valve assembly 500 is connected to one end of the compressor 400; the other end of the compressor 400 is connected to the third port of the four-way valve assembly 500; the fourth port of the four-way valve assembly 500 is connected to one end of the outdoor heat exchanger 600; the other end of the outdoor heat exchanger 600 is connected to the expansion valve 120.

[0069] Furthermore, it is understandable that Figure 1 The entire air conditioning system shown can realize a complete refrigeration cycle process. Specifically, the compressor 400 discharges the high-temperature and high-pressure gaseous refrigerant, passes through the four-way valve assembly 500, and enters the outdoor heat exchanger 600, where the refrigerant is cooled to become a high-pressure, medium-temperature saturated or supercooled liquid, and then enters the refrigerant heat dissipation assembly 110 after throttling and reducing the pressure through the expansion valve 120 to dissipate heat for the main control board and other electronic control devices, and then throttles and reduces the pressure through the one-way throttle valve 200 to reduce the pressure to a low-temperature, low-pressure saturated state, and then enters the indoor heat exchanger 700 through the high-pressure valve 300 to evaporate and absorb heat to become a low-pressure, low-temperature gas, and flows through the low-pressure valve 800 and the four-way valve assembly 500 back to the compressor 400, and the above completes a complete refrigeration cycle process.

[0070] Reference Figure 2 As shown, the embodiment of the present application further provides an anti-condensation control method, which is applied to the air-conditioning system of the first aspect embodiment, and the anti-condensation control method includes:

[0071] Step S110, obtaining the detected temperature of the target temperature sensor 130, and determining the target dew point temperature according to the outdoor ambient temperature;

[0072] Step S120, increasing the opening of the expansion valve 120 so that the detected temperature is greater than the target dew point temperature.

[0073] like Figure 2 As shown, Figure 2 This is a flow chart of the anti-condensation control method of an embodiment of the present invention. The control method of the embodiment of the present invention can be executed by the controller of the first aspect embodiment, wherein the detection temperature acquired by the controller is collected by the target temperature sensor 130 of the first aspect embodiment, and the outdoor ambient temperature can be collected by the outdoor ambient temperature sensor of the outdoor heat exchanger 600 of the embodiment of the present invention.

[0074] It can be understood that the controller of the embodiment of the present invention obtains the detection temperature collected by the target temperature sensor 130 by executing the anti-condensation control method of the embodiment of the present invention, and controls the opening of the expansion valve 120 according to the target dew point temperature determined by the outdoor ambient temperature, so that the detection temperature is greater than the target dew point temperature, that is, it ensures that the temperature of the section of the pipeline before the refrigerant enters the refrigerant heat dissipation component 110 is not too low to form condensed water, thereby preventing the main control board from being affected by condensed water and malfunctioning.

[0075] In some embodiments, reference Figure 3 As shown, the target dew point temperature is determined according to the outdoor ambient temperature in the above step S110, including:

[0076] Step S210, determining the outdoor air dry-bulb temperature according to the outdoor ambient temperature;

[0077] Step S220, determining the corresponding target dew point temperature according to the outdoor air dry-bulb temperature.

[0078] refer to Figure 3 , Figure 3 This is a flow chart of determining the target dew point temperature according to the outdoor ambient temperature according to an embodiment of the present invention. It can be understood that first, the outdoor ambient temperature sensor provided by the outdoor heat exchanger 600 is used for real-time monitoring to determine the outdoor air dry bulb temperature; then Figure 4 The query is performed to find the intersection of the determined outdoor air dry-bulb temperature and the target dew-point temperature control line, and the corresponding target dew-point temperature is determined based on the intersection.

[0079] Specifically, Figure 4 The following is a schematic diagram of the dew point temperature relationship of an embodiment of the present invention. The horizontal axis in the figure is the outdoor air dry bulb temperature (in degrees Celsius); the vertical axis is the outdoor air relative humidity (in percentage); each curve in the figure represents a different dew point temperature; and the other single line is the target dew point temperature control line. Taking the outdoor air dry bulb temperature of 42 degrees Celsius as an example, by querying Figure 4 It can be seen that for the intersection of the outdoor air dry-bulb temperature of 42 degrees Celsius and the target dew point temperature control line, the dew point temperature of the curve at the intersection is 40 degrees Celsius, that is, the final target dew point temperature is 40 degrees Celsius, that is, in actual anti-condensation control, by adjusting the opening of the expansion valve 120, the value of the detected temperature collected by the target temperature sensor 130 can be controlled above 40 degrees Celsius.

[0080] Furthermore, it should be noted that Figure 4The schematic diagram of the relationship between the dew point temperature and the relative humidity is obtained by obtaining the daily outdoor ambient temperature and relative humidity data of typical representative cities in fifteen major climate zones in China (Fuzhou, Nanjing, Guangzhou, Chengdu, Wuhan, Hefei, Jinan, Beijing, Shenyang, Shanghai, Chongqing, Haikou, Lanzhou, Yinchuan, Xining) throughout the year, and fitting it through the air dew point temperature calculation formula Figure 4 The target dew point temperature control line in the figure. The horizontal axis of the target dew point temperature control line ranges from 18 degrees Celsius to 60 degrees Celsius, which specifically shows that in some embodiments of the present invention, through experimental testing and verification, when the outdoor air dry bulb temperature is in the range of 18 degrees Celsius to 60 degrees Celsius, the condensation of the refrigerant heat dissipation component 110 can be effectively controlled, and better heat dissipation conditions can be provided for electronic control components such as the main control board.

[0081] In some embodiments, reference Figure 5 As shown, in the above step S120, increasing the opening of the expansion valve 120 so that the detected temperature is greater than the target dew point temperature includes:

[0082] Step S310, subtracting the target dew point temperature from the detected temperature to obtain a temperature difference;

[0083] Step S320, when the temperature difference is less than the preset temperature value, increasing the opening of the expansion valve 120;

[0084] Among them, the preset temperature value is greater than 0.

[0085] refer to Figure 5 , Figure 5 This is a flow chart of increasing the opening of the expansion valve 120 so that the detected temperature is greater than the target dew point temperature according to an embodiment of the present invention. It is understandable that, since factors such as the measurement error of the target temperature sensor 130 need to be considered in practical applications, a certain control margin will be set, so the magnitude of the detected temperature after control and adjustment should be slightly greater than the determined target dew point temperature. Specifically, by continuously increasing the opening of the expansion valve 120, the detected temperature is continuously increased to meet the control margin requirement.

[0086] In some embodiments, reference Figure 6 As shown, increasing the opening of the expansion valve 120 in the above step S320 includes:

[0087] Step S410, increasing the current opening of the expansion valve 120 according to a preset opening;

[0088] Step S420, obtaining the detected temperature after a preset time and re-determining the temperature difference;

[0089] Step S430: When the temperature difference is less than the preset temperature value, the opening of the expansion valve 120 is increased again according to the preset opening.

[0090] refer to Figure 6 , Figure 6 This is a flow chart of increasing the opening of the expansion valve 120 according to an embodiment of the present invention. It can be understood that in the process of continuously increasing the opening of the expansion valve 120, the detected temperature is intermittently obtained to determine whether the temperature difference reaches the preset temperature value. If the temperature difference does not reach the preset temperature value, the opening of the expansion valve 120 continues to be increased; if the temperature difference reaches the preset temperature value, the control margin requirement is met and the opening adjustment is stopped.

[0091] In some embodiments, the preset temperature value is 1 degree Celsius. It is understandable that the preset temperature value is set to 1 degree Celsius to meet actual needs.

[0092] An embodiment of the present application also provides a controller, comprising at least one processor and a memory for communicating with the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the anti-condensation control method as described in the above embodiment.

[0093] An embodiment of the present application also provides an air conditioning system, comprising the controller of the above embodiment.

[0094] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0095] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. An air conditioning system, characterized in that: include: A refrigerant heat dissipation component, connected to a refrigerant circulation pipeline of the air conditioning system, so as to draw out refrigerant in the refrigerant circulation pipeline to dissipate heat for a main control board of the air conditioning system; An expansion valve, one end of which is connected to the outdoor heat exchanger, and the other end of which is connected to the refrigerant heat dissipation component; A target temperature sensor is arranged between the expansion valve and the refrigerant heat dissipation component; The controller is used to obtain the detection temperature of the target temperature sensor, determine the target dew point temperature according to the outdoor ambient temperature, and increase the opening of the expansion valve so that the detection temperature is greater than the target dew point temperature.

2. The air conditioning system according to claim 1, characterized in that: The air conditioning system further comprises a one-way throttle valve, which is arranged between the refrigerant heat dissipation component and the indoor heat exchanger, and the direction of the one-way throttle valve points to the indoor heat exchanger.

3. The air conditioning system according to claim 2, characterized in that: The air conditioning system further includes a high-pressure valve disposed between the indoor heat exchanger and the one-way throttle valve.

4. A method for preventing condensation, characterized in that: Applied to the air conditioning system according to any one of claims 1 to 3, the anti-condensation control method comprises: Acquire the detection temperature of the target temperature sensor, and determine the target dew point temperature according to the outdoor ambient temperature; The opening degree of the expansion valve is increased so that the detected temperature is greater than the target dew point temperature.

5. The anti-condensation control method according to claim 4, characterized in that: Determining the target dew point temperature according to the outdoor ambient temperature includes: determining an outdoor air dry-bulb temperature according to the outdoor ambient temperature; The corresponding target dew point temperature is determined according to the outdoor air dry-bulb temperature.

6. The anti-condensation control method according to claim 4, characterized in that: The step of increasing the opening of the expansion valve so that the detected temperature is greater than the target dew point temperature includes: Subtracting the target dew point temperature from the detected temperature to obtain a temperature difference; When the temperature difference is less than a preset temperature value, increasing the opening of the expansion valve; Wherein, the preset temperature value is greater than 0.

7. The anti-condensation control method according to claim 6, characterized in that: Increasing the opening of the expansion valve includes: increasing the current opening of the expansion valve according to a preset opening; After a preset time period, the detected temperature is obtained and the temperature difference is re-determined; When the temperature difference is less than a preset temperature value, the opening of the expansion valve is increased again according to the preset opening.

8. The anti-condensation control method according to claim 6, characterized in that: The preset temperature value is 1 degree Celsius.

9. A controller, characterized in that It includes at least one processor and a memory for communicating with the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the anti-condensation control method as described in any one of claims 4 to 8.

10. An air conditioning system, characterized in that: Comprising a controller as claimed in claim 9.

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