An anti-condensation air conditioning system and control method

Abstract

This invention provides an anti-condensation air conditioning system and control method. By setting a connecting component, one end of the compressor, the outdoor heat exchange component, and the second heat exchanger are all connected to the connecting component. By setting a first throttling device between the connecting component and the first heat exchanger, and a second throttling device between the first and second heat exchangers, the output from the compressor enters the second heat exchanger through the connecting component, then enters the first heat exchanger through the second throttling device, then enters the outdoor heat exchanger through the first throttling device and the connecting component, and finally returns to the compressor through the connecting component, forming a refrigeration flow path. This refrigeration flow path lowers the air temperature to well below the dew point through the first heat exchanger and raises the air temperature to a suitable supply air temperature through the second heat exchanger, effectively avoiding the problem of condensation at the air conditioner outlet during the cooling process.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and in particular to an anti-condensation air conditioning system and control method. Background Technology

[0002] In summer, air conditioning has become an indispensable household appliance. A safe and comfortable air conditioner can bring a good experience to users. However, when the air conditioner is running under high humidity conditions, especially in cooling mode, the temperature of the air at the air outlet after mixing with the indoor air is much lower than the dew point temperature of the air. This can easily cause condensation during the cooling process, which means that a large number of water droplets are easily generated on the surface of the air conditioner structure, and may even drip onto the floor, or water droplets may be blown out by the wind during operation, affecting the user experience. Summary of the Invention

[0003] This invention provides an anti-condensation air conditioning system and control method, both of which address the problem of condensation during the cooling process of existing air conditioners.

[0004] In a first aspect, embodiments of the present invention provide an anti-condensation air conditioning system, comprising: a connecting component; a compressor connected to the connecting component; an outdoor heat exchange component connected to the connecting component; an indoor heat exchange component including a first heat exchanger and a second heat exchanger, one end of the second heat exchanger being connected to the connecting component; and a throttling device, comprising at least a first throttling device and a second throttling device, the first throttling device being disposed between one end of the first heat exchanger and the connecting component, and the second throttling device being disposed between the other end of the first heat exchanger and the other end of the second heat exchanger.

[0005] Specifically, the throttling device further includes a third throttling device, which is disposed between one end of the second heat exchanger and the connecting component.

[0006] Specifically, the communication component includes at least six interfaces: a first interface, a second interface, a third interface, a fourth interface, a fifth interface, and a sixth interface. The first interface is connected to the outlet of the compressor, the second interface is connected to one end of the outdoor heat exchange component, the third interface is connected to one end of the third throttling device, the fourth interface is connected to the inlet of the compressor, the fifth interface is connected to the other end of the outdoor heat exchange component, and the sixth interface is connected to one end of the first throttling device.

[0007] Specifically, the first interface is selectively connected to the second or sixth interface, the third interface is selectively connected to the second or fourth interface, and the fifth interface is selectively connected to the fourth or sixth interface.

[0008] Secondly, embodiments of the present invention provide a control method for an anti-condensation air conditioning system, comprising the following steps:

[0009] Receives a command to enter cooling mode;

[0010] The refrigerant output from the compressor is controlled to first enter the outdoor heat exchange component to release heat and cool through the connecting component, then be throttled by the first throttling device, then enter the first heat exchanger to release heat, then be throttled by the second throttling device, and then enter the second heat exchanger to absorb heat, and finally return to the compressor through the connecting component and circulate.

[0011] In the circulation process, the refrigerant and air flow in opposite directions in the first and second heat exchangers. The second heat exchanger first cools and dehumidifies the air, and then the first heat exchanger heats and dehumidifies the air that has been cooled and dehumidified by the second heat exchanger.

[0012] The refrigerant output from the compressor, controlled by the communication assembly, first enters the outdoor heat exchange assembly for heat release and cooling, then is throttled by the first throttling device, then enters the first heat exchanger for heat release, then is throttled by the second throttling device, and then enters the second heat exchanger for heat absorption, finally returning to the compressor through the communication assembly and circulating, including the following steps:

[0013] Adjust the opening degree of the first throttling device and the second throttling device to the preset opening degree;

[0014] Obtain the first temperature of the first heat exchanger and the second temperature of the second heat exchanger;

[0015] Compare the first temperature with the preset temperature;

[0016] If the first temperature is greater than the sum of a predetermined percentage of the preset temperature and a preset cooling deviation parameter, then the opening of the first throttling device is reduced; if the first temperature is less than the sum of a predetermined percentage of the preset temperature and the preset cooling deviation parameter, then the opening of the first throttling device is increased; if the first temperature is equal to the sum of a predetermined percentage of the preset temperature and the preset cooling deviation parameter, then the opening of the first throttling device is maintained.

[0017] Compare the second temperature with 0°C;

[0018] If the second temperature is greater than the sum of 0°C and the preset cooling deviation parameter, the opening of the second throttling device is increased; if the second temperature is less than the sum of 0°C and the preset cooling deviation parameter, the opening of the second throttling device is decreased; if the second temperature is equal to the sum of 0°C and the preset cooling deviation parameter, the opening of the second throttling device is maintained.

[0019] The control method further includes the following steps:

[0020] Receives a command to enter the cooling and anti-freeze mode;

[0021] Decrease the opening of the first throttling device and increase the opening of the second throttling device to lower the temperature of the refrigerant in the first heat exchanger and raise the temperature of the refrigerant in the second heat exchanger.

[0022] The step of reducing the opening of the first throttling device and increasing the opening of the second throttling device to lower the temperature of the refrigerant in the first heat exchanger and to raise the temperature of the refrigerant in the second heat exchanger includes:

[0023] Obtain the second temperature of the second heat exchanger;

[0024] Compare the second temperature with 0°C;

[0025] If the second temperature is consistently less than the sum of 0°C and the preset cooling deviation parameter for a continuous period of time, then the opening degree of the second throttling device is increased, and the opening degree of the first throttling device is decreased.

[0026] The control method further includes: receiving a command to enter the heating mode;

[0027] The refrigerant output from the compressor is controlled to pass through the connecting component, first through the first throttling device to enter the first heat exchanger to release heat, then through the second throttling device to enter the second heat exchanger to release heat, then through the third throttling device to enter the outdoor heat exchange component to absorb heat, and finally through the connecting component back into the compressor and circulates.

[0028] In the circulation process, the refrigerant and air flow in opposite directions in the first heat exchanger and the second heat exchanger. The second heat exchanger first heats the air, and then the first heat exchanger further heats the air heated by the second heat exchanger.

[0029] The refrigerant output from the compressor, controlled by the connecting assembly, first passes through the first throttling device into the first heat exchanger to release heat, then passes through the second throttling device into the second heat exchanger to release heat, then passes through the third throttling device and enters the outdoor heat exchange assembly to absorb heat, and finally returns to the compressor through the connecting assembly, circulating in a cycle, including the following steps:

[0030] Adjust the opening degree of the third throttling device to a preset opening degree;

[0031] Obtain the second temperature;

[0032] Compare the second temperature with the preset temperature;

[0033] If the second temperature is greater than the sum of a predetermined percentage of the preset temperature and a preset heating deviation parameter, the opening of the third throttling device is increased; if the second temperature is less than the sum of a predetermined percentage of the preset temperature and a preset heating deviation parameter, the opening of the third throttling device is decreased; if the second temperature is equal to the sum of a predetermined percentage of the preset temperature and a preset heating deviation parameter, the opening of the third throttling device is maintained.

[0034] The control method further includes the following steps:

[0035] Receives cooling that has entered heating / defrosting mode;

[0036] Decrease the opening of the second throttling device and increase the opening of the third throttling device to lower the refrigerant temperature of the second heat exchanger and raise the refrigerant temperature of the outdoor heat exchange component.

[0037] The steps of reducing the opening of the second throttling device and increasing the opening of the third throttling device to lower the refrigerant temperature of the second heat exchanger and raise the refrigerant temperature of the outdoor heat exchange component include the following:

[0038] Increase the opening degree of the first throttling device and the second throttling device to the maximum opening degree;

[0039] Obtain the third temperature of the outdoor heat exchange component and the outdoor temperature;

[0040] The outdoor temperature is compared with a first specified temperature and a second specified temperature, and the third temperature is compared with 0°C, wherein the first specified temperature is a positive temperature and the second specified temperature is a negative temperature;

[0041] If the outdoor temperature is greater than or equal to the second specified temperature, less than or equal to the first specified temperature, and the third temperature is always less than 0°C for a continuous period of time, or if the outdoor temperature is less than or equal to the second specified temperature, and the third temperature is always less than 0°C for a continuous period of time, then the current opening degree of the third throttling device is obtained.

[0042] Adjust the opening degree of the second throttling device to the current opening degree of the third throttling device, and increase the opening degree of the third throttling device to the maximum opening degree;

[0043] Compare the third temperature with the third specified temperature;

[0044] If the third temperature is greater than the third specified temperature, the opening degree of the third throttling device is adjusted to the current opening degree of the second throttling device, and the second throttling device is increased to its maximum opening degree.

[0045] This invention provides an anti-condensation air conditioning system and control method. By setting a connecting component, one end of the compressor, the outdoor heat exchange component, and the second heat exchanger are all connected to the connecting component. By setting a first throttling device between the connecting component and the first heat exchanger, and a second throttling device between the first and second heat exchangers, the output from the compressor enters the second heat exchanger through the connecting component, then enters the first heat exchanger through the second throttling device, then enters the outdoor heat exchanger through the first throttling device and the connecting component, and finally returns to the compressor through the connecting component, forming a refrigeration flow path. This refrigeration flow path lowers the air temperature to well below the dew point through the first heat exchanger and raises the air temperature to a suitable supply air temperature through the second heat exchanger, effectively avoiding the problem of condensation at the air conditioner outlet during the cooling process. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a flow diagram of the cooling mode of an anti-condensation air conditioning system provided in an embodiment of the present invention;

[0048] Figure 2 This is a control flowchart of the cooling mode provided in an embodiment of the present invention;

[0049] Figure 3 This is a control flowchart of the cooling and anti-freezing mode provided in an embodiment of the present invention;

[0050] Figure 4 This is a flow diagram of the heating mode of an anti-condensation air conditioning system provided in an embodiment of the present invention;

[0051] Figure 5 This is a control flowchart of the heating mode provided in an embodiment of the present invention;

[0052] Figure 6 This is a control flowchart of the heating and defrosting mode provided in an embodiment of the present invention.

[0053] Explanation of the markings in the image:

[0054] 1. Connectivity component; 11. First interface; 12. Second interface; 13. Third interface; 14. Fourth interface; 15. Fifth interface; 16. Sixth interface;

[0055] 2. Compressor;

[0056] 3. Outdoor heat exchange components;

[0057] 4. Indoor heat exchange components; 41. First heat exchanger; 42. Second heat exchanger;

[0058] 5. Throttling device; 51. First throttling device; 52. Second throttling device; 53. Third throttling device;

[0059] 6. Indoor unit fan;

[0060] 7. Outdoor unit fan. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0063] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0064] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0065] Please see below. Figure 1This invention provides an anti-condensation air conditioning system, comprising: a connecting component 1; a compressor 2 connected to the connecting component 1; an outdoor heat exchange component 3 connected to the connecting component 1; an indoor heat exchange component 4 including a first heat exchanger 41 and a second heat exchanger 42, one end of the second heat exchanger 42 being connected to the connecting component 1; and a throttling device 5, comprising at least a first throttling device 51 and a second throttling device 52, the first throttling device 51 being disposed between one end of the first heat exchanger 41 and the connecting component 1, and the second throttling device 52 being disposed between the other end of the first heat exchanger 41 and the other end of the second heat exchanger 42.

[0066] In this embodiment, the heat exchange system includes a first heat exchanger 41 located on the air outlet side of the indoor unit fan 6, a second heat exchanger 42 located on the air inlet side of the indoor unit fan 6, a first throttling device 51 located in front of the first heat exchanger 41, a second throttling device 52 located between the first heat exchanger 41 and the second heat exchanger 42, and an outdoor heat exchange assembly 3 located on the air inlet side of the outdoor unit fan 7. This system connects the compressor 2, outdoor heat exchange component 3, and one end of the second heat exchanger 42 to the connecting component 1. A first throttling device 51 is installed between the connecting component 1 and the first heat exchanger 41, and a second throttling device 52 is installed between the first heat exchanger 41 and the second heat exchanger 42. This allows the output from the compressor 2 to pass through the connecting component 1 into the second heat exchanger 42, then through the second throttling device 52 into the first heat exchanger 41, then through the first throttling device 51 and the connecting component 1 into the outdoor heat exchanger 3, and finally back to the compressor 2 via the connecting component 1, forming a cooling flow path. This cooling flow path lowers the air temperature to well below the dew point through the first heat exchanger 41, forcing water vapor in the air to condense and separate, significantly reducing the air's moisture content. Simultaneously, the second heat exchanger 42 raises the air temperature to a suitable supply air temperature, reducing air humidity and preventing water droplets from floating at the air outlet after the supplied air mixes with the air at a temperature below the dew point of the mixed air. This effectively avoids condensation at the air conditioner outlet during the cooling process, thus improving the user experience.

[0067] In addition, a throttling device is a valve that can adjust the degree of opening. Increasing the opening degree means adjusting it to the fully open degree, and decreasing the opening degree means adjusting it to the fully closed degree. After the air passes through the throttling device, the pressure decreases, the enthalpy remains unchanged, and the temperature will inevitably drop.

[0068] In one embodiment, such as Figure 1 As shown, the throttling device 5 also includes a third throttling device 53, which is disposed between one end of the second heat exchanger 42 and the connecting component 1.

[0069] In this embodiment, the system includes a cooling mode and a heating mode. In the cooling mode, the opening of the third throttling device 53 can be at its maximum. At this time, the third throttling device 53 does not have a throttling effect, and there is almost no pressure drop or temperature drop. In the heating mode, the opening of the third throttling device 53 is a preset opening. The third throttling device 53 has a throttling effect, and the output after throttling has the effect of cooling and reducing pressure. The size of the preset opening can be determined according to the specific situation.

[0070] In one embodiment, such as Figure 1 As shown, the connecting component 1 includes at least six interfaces: a first interface 11, a second interface 12, a third interface 13, a fourth interface 14, a fifth interface 15, and a sixth interface 16. The first interface 11 is connected to the outlet of the compressor 2, the second interface 12 is connected to one end of the outdoor heat exchange component 3, the third interface 13 is connected to one end of the third throttling device 53, the fourth interface 14 is connected to the inlet of the compressor 2, the fifth interface 15 is connected to the other end of the outdoor heat exchange component 3, and the sixth interface 16 is connected to one end of the first throttling device 51.

[0071] In this embodiment, the output from the compressor 2 outlet enters the outdoor heat exchange component 3 through the first interface 11 and the second interface 12 of the connecting component 1, then enters the first heat exchanger 41 through the fifth interface 15, the sixth interface 16 and the first throttling device 51, then enters the second heat exchanger 42 through the second throttling device 52, and finally returns to the compressor 2 through the third interface 13 and the fourth interface 14, and the cycle continues. The advantage of setting multiple interfaces in this embodiment is that the output of the compressor 2 does not interfere with each other in the entire flow path.

[0072] In one embodiment, the first interface 11 is selectively connected to the second interface 12 or the sixth interface 16, the third interface 13 is selectively connected to the second interface 12 or the fourth interface 14, and the fifth interface 15 is selectively connected to the fourth interface 14 or the sixth interface 16.

[0073] In this embodiment, as Figure 1 As shown, in cooling mode, the first interface 11 is connected to the second interface 12, the third interface 13 is connected to the fourth interface 14, and the fifth interface 15 is connected to the sixth interface 16. This allows the output from the compressor 2 outlet to enter the outdoor heat exchange component 3 via the first interface 11 and exit via the second interface 12, then enter the first heat exchanger 41 via the fifth interface 15 and exit via the sixth interface 16, and then enter the second heat exchanger 42 via the first throttling device 51, and finally enter the second heat exchanger 42 via the second throttling device 52, and finally return to the compressor 2 via the third interface 13 and exit via the fourth interface 14.

[0074] like Figure 4As shown, in heating mode, the first interface 11 is connected to the sixth interface 16, the third interface 13 is connected to the second interface 12, and the fifth interface 15 is connected to the fourth interface, so that the output from the compressor 2 outlet enters through the first interface 11 and exits through the sixth interface 16, thereby entering the first heat exchanger 41 and the second heat exchanger 42, and then enters through the third throttling device 53, and enters through the third interface 13 and exits through the second interface 12, entering the outdoor heat exchange component 3, and then enters through the fifth interface 15 and exits through the fourth interface 14, thereby returning to the compressor 2.

[0075] This invention provides a control method for an anti-condensation air conditioning system, comprising the following steps:

[0076] Receives a command to enter cooling mode;

[0077] The refrigerant output from the compressor 2 is controlled to first enter the outdoor heat exchange component 3 to release heat and cool through the connecting component 1, then be throttled by the first throttling device 51, then enter the first heat exchanger 41 to release heat, then be throttled by the second throttling device 52, and then enter the second heat exchanger 42 to absorb heat, and finally return to the compressor 2 through the connecting component 1 and circulate.

[0078] In the circulation process, the refrigerant and air flow in the first heat exchanger 41 and the second heat exchanger 42 in opposite directions. The second heat exchanger 42 first cools and dehumidifies the air, and then the first heat exchanger 41 heats and dehumidifies the air that has been cooled and dehumidified by the second heat exchanger 42.

[0079] In this embodiment, as Figure 1 As shown, in cooling mode, the high-temperature, high-pressure refrigerant from compressor 2 enters through the first port 11 and exits through the second port 12. It then first enters the outdoor heat exchange component 3 to fully release heat and cool into a higher temperature and pressure refrigerant. After initial throttling by the first throttling device 51, it becomes a normal temperature and pressure refrigerant. It then enters the first heat exchanger 41 to release heat slightly to the indoor unit fan 6 for heat recovery. After further throttling by the second throttling device 52, it becomes a low-temperature, low-pressure refrigerant. Finally, it enters the second heat exchanger 42 through the fully open third throttling device 53 to fully absorb heat. Finally, it enters through the third port 13 and exits through the fourth port 14, returning to compressor 2 and circulating. The third throttling device 53 is at its maximum opening, i.e., fully open, so it does not perform a throttling function during the cooling process.

[0080] Throughout the entire cycle, the refrigerant and air flow in the indoor heat exchange component 4 in a counter-current manner, ensuring sufficient heat exchange between the refrigerant and air. In the refrigeration path, the second heat exchanger 42 performs cooling and dehumidification, lowering the air temperature to well below the dew point, forcing water vapor in the air to condense and separate, thus significantly reducing the air's moisture content. The first heat exchanger 41 performs heat recovery and humidity reduction, heating the low-temperature air cooled and dehumidified by the second heat exchanger 42 to a comfortable supply air temperature, while simultaneously reducing air humidity to prevent water droplets from floating at the air outlet after the temperature of the supplied air mixed with the air below the dew point of the mixed air.

[0081] The refrigerant output from compressor 2 is controlled to first enter outdoor heat exchange component 3 for heat release and cooling via connecting component 1, then throttled by first throttling device 51, then enters first heat exchanger 41 for heat release, then throttled by second throttling device 52, and enters second heat exchanger 42 for heat absorption, finally returning to compressor 2 via connecting component 1 and circulating. Specifically, as follows... Figure 2 As shown, steps S101-S106 are included:

[0082] S101, Adjust the opening degree of the first throttling device 51 and the second throttling device 52 to the preset opening degree;

[0083] S102, Obtain the first temperature of the first heat exchanger 41 and the second temperature of the second heat exchanger 42;

[0084] S103. Compare the first temperature with the preset temperature;

[0085] S104. If the first temperature is greater than the sum of a predetermined percentage of the preset temperature and the preset cooling deviation parameter, then the opening of the first throttling device 51 is reduced; if the first temperature is less than the sum of a predetermined percentage of the preset temperature and the preset cooling deviation parameter, then the opening of the first throttling device 51 is increased; if the first temperature is equal to the sum of a predetermined percentage of the preset temperature and the preset cooling deviation parameter, then the opening of the first throttling device 51 is maintained.

[0086] S105. Compare the second temperature with 0°C;

[0087] S106. If the second temperature is greater than the sum of 0℃ and the preset cooling deviation parameter, the opening of the second throttling device 52 is increased; if the second temperature is less than the sum of 0℃ and the preset cooling deviation parameter, the opening of the second throttling device 52 is decreased; if the second temperature is equal to the sum of 0℃ and the preset cooling deviation parameter, the opening of the second throttling device 52 is maintained.

[0088] In this embodiment, the first temperature is the tube temperature of the first heat exchanger 41, and the second temperature is the tube temperature of the second heat exchanger 42. The smaller the opening of the throttling device 5, the more obvious the throttling effect, the greater the pressure drop before and after throttling, and the greater the temperature drop. Conversely, the larger the opening, the smaller the throttling effect, the smaller the pressure drop before and after throttling, and the smaller the temperature drop. Therefore, when comparing the first temperature with the preset temperature and the second temperature with 0°C, if the first temperature or the second temperature is too high or too low, the opening of the corresponding throttling device 5 is adjusted to increase or decrease, so as to lower or raise the first temperature or the second temperature, thereby obtaining a comfortable air supply temperature.

[0089] The predetermined ratio can be 1 / 2. That is, if the first temperature is greater than 1 / 2 of the preset temperature and the preset cooling deviation parameter, the opening of the first throttling device 51 is reduced. The preset ratios involved thereafter can all be 1 / 2, or can be set according to specific circumstances. Similarly, the preset opening, preset temperature and preset cooling deviation parameter can all be set according to specific circumstances. Moreover, the preset temperature in subsequent embodiments is the same as the preset temperature in this embodiment.

[0090] The control method further includes the following steps:

[0091] Receives a command to enter the cooling and anti-freeze mode;

[0092] Decrease the opening of the first throttling device 51 and increase the opening of the second throttling device 52 to lower the temperature of the refrigerant in the first heat exchanger 41 and raise the temperature of the refrigerant in the second heat exchanger 42.

[0093] In this embodiment, in cooling mode, if the second heat exchanger 42 freezes, the opening of the first throttling device 51 is reduced and the opening of the second throttling device 52 is increased. This lowers the temperature of the refrigerant in the first heat exchanger 41 and raises the temperature of the refrigerant in the second heat exchanger 42. This increases the cooling load of the first heat exchanger 41 and reduces the cooling load of the second heat exchanger 42, thus achieving thawing of the second heat exchanger 42 without reducing the cooling effect. Throughout the thawing period, the compressor 2 maintains a stable load and operates smoothly, with no decrease in cooling effect.

[0094] Specifically, such as Figure 3 As shown, reducing the opening of the first throttling device 51 and increasing the opening of the second throttling device 52, thereby lowering the temperature of the refrigerant in the first heat exchanger 41 and raising the temperature of the refrigerant in the second heat exchanger 42, includes steps S201-S203:

[0095] S201, Obtain the second temperature of the second heat exchanger 42;

[0096] S202. Compare the second temperature with 0°C;

[0097] S203. If the second temperature is consistently less than the sum of 0°C and the preset refrigeration deviation parameter for a continuous period of time, then increase the opening of the second throttling device 52 and decrease the opening of the first throttling device 51.

[0098] In this embodiment, when a command to enter the anti-freeze mode is received, it indicates that freezing has occurred during the cooling process. At this time, the pipe temperature (i.e., the second temperature) of the second heat exchanger 42 will inevitably be below 0°C. If the second temperature remains below 0°C for a continuous period of time, the opening of the second throttling device 52 is gradually increased while the opening of the first throttling device 51 is decreased, transferring part of the cooling load of the second heat exchanger 42 to the first heat exchanger 41. This continues until the second temperature remains below the preset cooling deviation parameter for a continuous period of time, at which point the anti-freeze mode is exited. During the entire anti-freeze mode, the cooling effect is unaffected, and the compressor 2 operates smoothly, avoiding power loss and capacity loss of the regulating throttling device 5 caused by frequent starting or stopping of the compressor 2. In this embodiment, the first continuous period of time can be 1 minute, meaning that if the second temperature remains below 0°C for 1 minute, the opening of the second throttling device 52 is gradually increased while the opening of the first throttling device 51 is decreased. The second continuous period of time can be 3 minutes, meaning that the second temperature remains below the preset cooling deviation parameter for 3 minutes, at which point the anti-freeze mode is exited. In addition, these two consecutive time periods can be set according to the specific scenario; they can be set to the same consecutive time period or different consecutive time periods.

[0099] The control method further includes:

[0100] Receive command to enter heating mode;

[0101] The refrigerant output from the compressor 2 passes through the connecting assembly 1, first through the first throttling device 51 to enter the first heat exchanger 41 to release heat, then through the second throttling device 52 to enter the second heat exchanger 42 to release heat, then through the third throttling device 53 to throttle, and then into the outdoor heat exchange assembly 3 to absorb heat, and finally through the connecting assembly 1 back into the compressor 2 and circulates.

[0102] In the circulation process, the refrigerant and air flow in the first heat exchanger 41 and the second heat exchanger 42 in opposite directions. The second heat exchanger 42 first heats the air, and then the first heat exchanger 41 further heats the air heated by the second heat exchanger 42.

[0103] The heat exchange system of this embodiment includes a first heat exchanger 41 located on the air outlet side of the indoor unit fan 6, a second heat exchanger 42 located on the air inlet side of the indoor unit fan 6, and an outdoor heat exchange assembly 3 located on the air inlet side of the outdoor unit fan 7. Figure 4As shown, in heating mode, the high-temperature, high-pressure refrigerant from compressor 2 enters through the first port 11 and exits through the sixth port 16. It then enters the first heat exchanger 41 through the fully open first throttling device 51, where it is fully cooled to a higher temperature and pressure. After passing through the fully open second throttling device 52, it enters the second heat exchanger 42 for further cooling to a normal temperature and higher pressure. Then, after being throttled by the third throttling device 53 into a lower temperature and lower pressure refrigerant, it enters the outdoor heat exchange component 3 for full heat absorption. Finally, it enters through the fifth port 15 and exits through the fourth port 14, returning to compressor 2 and circulating. The first and second throttling devices 51 and 52 are at their maximum opening, i.e., fully open. In this state, the first and second throttling devices 51 and 52 do not perform throttling during heating.

[0104] Throughout the entire cycle, the refrigerant and air flow in the indoor heat exchange component 3 in a counter-current manner, ensuring sufficient heat exchange between the refrigerant and air. During the heating process, the second heat exchanger 42 performs the initial heating task, preheating the low-temperature air entering the air conditioner and storing heat for the subsequent defrosting function. The first heat exchanger 41 performs the secondary heating task, further heating the air preheated by the second heat exchanger 42 to a suitable temperature.

[0105] The refrigerant output from compressor 2 is controlled to first pass through the first throttling device 51 into the first heat exchanger 41 to release heat, then through the second throttling device 52 into the second heat exchanger 42 to release heat, then through the third throttling device 53 and into the outdoor heat exchanger 3 to absorb heat, and finally back into compressor 2 through the connecting component 1, and circulates. Specifically, as follows... Figure 5 As shown, steps S301-S304 are included:

[0106] S301, Adjust the opening degree of the third throttling device 53 to the preset opening degree;

[0107] S302, Obtain the second temperature;

[0108] S303. Compare the second temperature with the preset temperature;

[0109] S304. If the second temperature is greater than the sum of a predetermined percentage of the preset temperature and the preset heating deviation parameter, the opening of the third throttling device 53 is increased; if the second temperature is less than the sum of a predetermined percentage of the preset temperature and the preset heating deviation parameter, the opening of the third throttling device 53 is decreased; if the second temperature is equal to the sum of a predetermined percentage of the preset temperature and the preset heating deviation parameter, the opening of the third throttling device 53 is maintained.

[0110] In this embodiment, by comparing the second temperature with the preset temperature, if the second temperature is too high or too low, the throttling effect is adjusted by increasing or decreasing the opening of the third throttling device 53, thereby lowering or raising the second temperature to obtain a comfortable air supply temperature. The preset opening, preset temperature, preset ratio, and preset heating deviation parameter can all be set according to specific circumstances.

[0111] The control method further includes the following steps:

[0112] Receives cooling that has entered heating / defrosting mode;

[0113] Decrease the opening of the second throttling device 52 and increase the opening of the third throttling device 53 to lower the refrigerant temperature of the second heat exchanger 42 and raise the refrigerant temperature of the outdoor heat exchange component 3.

[0114] In this embodiment, in heating mode, if the outdoor heat exchange component 3 needs defrosting, the system can reduce the opening of the second throttling device 42 and increase the opening of the third throttling device 53 to keep the refrigerant temperature in the first heat exchanger 41 constant and reduce the refrigerant temperature in the second heat exchanger 42, while simultaneously increasing the refrigerant temperature in the outdoor heat exchange component 3. This transfers heat from the second heat exchanger 42 to the outdoor heat exchange component 3 for defrosting. During the entire defrosting process, the compressor 2 operates normally, and the indoor unit fan 6 continues to output heat, ensuring a comfortable user experience.

[0115] Decrease the opening of the second throttling device 52 and increase the opening of the third throttling device 53 to lower the refrigerant temperature of the second heat exchanger 42 and raise the refrigerant temperature of the outdoor heat exchange component 3. Specifically, as follows: Figure 6 As shown, steps S401-S407 are included:

[0116] S401, Increase the opening degree of the first throttling device 51 and the second throttling device 52 to the maximum opening degree;

[0117] S402, Obtain the third temperature and outdoor temperature of the outdoor heat exchange component 3;

[0118] S403. Compare the outdoor temperature with the first specified temperature, the second specified temperature, and the third temperature with 0°C, wherein the first specified temperature is a positive temperature and the second specified temperature is a negative temperature;

[0119] S404. If the outdoor temperature is greater than or equal to the second specified temperature and less than or equal to the first specified temperature, and the third temperature is always less than 0°C for a continuous period of time, or if the outdoor temperature is less than or equal to the second specified temperature, and the third temperature is always less than 0°C for a continuous period of time, then obtain the current opening degree of the third throttling device 53.

[0120] S405. Adjust the opening of the second throttling device 52 to the current opening of the third throttling device 53, and increase the opening of the third throttling device 53 to the maximum opening.

[0121] S406. Compare the third temperature with the third specified temperature;

[0122] S407. If the third temperature is greater than the third specified temperature, the opening of the third throttling device 53 is adjusted to the current opening of the second throttling device 52, and the second throttling device 52 is increased to the maximum opening.

[0123] In this embodiment, when cooling is received to enter the heating defrosting mode, it indicates that frost has formed on the outdoor unit fan 7 during the heating process. At this time, the pipe temperature (i.e., the third temperature) of the outdoor heat exchange component 3 will inevitably be below 0°C. There are two scenarios: one is that the outdoor temperature is greater than or equal to the second specified temperature and less than or equal to the first specified temperature, and the third temperature remains below 0°C for a continuous period of time; the other is that the outdoor temperature is less than or equal to the second specified temperature, and the third temperature remains below 0°C for a continuous period of time. The continuous period of time in these two scenarios can be set according to the specific situation; it can be the same continuous period or different continuous periods. In both cases, the opening of the second throttling device 42 needs to be adjusted to be equal to the current opening of the third throttling device 53, and the opening of the third throttling device 53 needs to be increased to the maximum opening. At this time, the first heat exchanger 41 temporarily undertakes all the heating tasks, and the second heat exchanger 42 releases heat to the outdoor heat exchange component 3 for defrosting, thereby increasing the temperature of the outdoor heat exchange component 3 (i.e., the third temperature). When the third temperature is greater than the third specified temperature, the system automatically exits the heating and defrosting mode, and the opening of the third throttling device 53 is adjusted to be equal to the opening of the second throttling device 52. At the same time, the opening of the second throttling device 52 is adjusted to the maximum opening, and the system operates normally in heating mode.

[0124] In this embodiment, the first specified temperature, the second specified temperature, and the third specified temperature are all positive temperatures, except for the second specified temperature, which is negative. For example, the first specified temperature can be 5.5℃, the second specified temperature can be -8.5℃, and the third specified temperature can be 5℃. Furthermore, the two continuous time periods mentioned in this embodiment are 30 minutes and 120 minutes respectively. That is, if the outdoor temperature is greater than or equal to -8.5℃ and less than or equal to 5.5℃, and the third temperature remains below 0℃ for 30 consecutive minutes, or if the outdoor temperature is less than or equal to -8.5℃, and the third temperature remains below 0℃ for 120 consecutive minutes, then the current opening degree of the third throttling device 53 is obtained. Additionally, the first and third specified temperatures can be set according to specific circumstances; they can be the same temperature or different temperatures. Similarly, the two continuous time periods can be set according to specific scenarios; they can be the same continuous time or different continuous time periods.

[0125] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

[0126] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An anti-condensation air conditioning system, characterized in that, include: Connecting components; The compressor is connected to the communication component; An outdoor heat exchange component, wherein the outdoor heat exchange component is connected to the connecting component; An indoor heat exchange assembly, comprising a first heat exchanger and a second heat exchanger, wherein one end of the second heat exchanger is connected to the communication assembly; A throttling device, comprising at least a first throttling device and a second throttling device, wherein the first throttling device is disposed between one end of the first heat exchanger and the connecting component, and the second throttling device is disposed between the other end of the first heat exchanger and the other end of the second heat exchanger. It also includes the following steps: Receives a command to enter cooling mode; The refrigerant output from the compressor is controlled to first enter the outdoor heat exchange component to release heat and cool through the connecting component, then be throttled by the first throttling device, then enter the first heat exchanger to release heat, then be throttled by the second throttling device, and then enter the second heat exchanger to absorb heat, and finally return to the compressor through the connecting component and circulate. In the circulation process, the refrigerant and air flow in the first heat exchanger and the second heat exchanger in opposite directions. The second heat exchanger first cools and dehumidifies the air, and the first heat exchanger then heats and dehumidifies the air that has been cooled and dehumidified by the second heat exchanger. It also includes: receiving instructions to enter the cooling and anti-freeze mode; Decrease the opening of the first throttling device and increase the opening of the second throttling device to lower the temperature of the refrigerant in the first heat exchanger and raise the temperature of the refrigerant in the second heat exchanger. The step of reducing the opening of the first throttling device and increasing the opening of the second throttling device to lower the temperature of the refrigerant in the first heat exchanger and to raise the temperature of the refrigerant in the second heat exchanger includes: Obtain the second temperature of the second heat exchanger; Compare the second temperature with 0°C; If the second temperature is consistently less than the sum of 0°C and the preset cooling deviation parameter for a continuous period of time, then the opening degree of the second throttling device is increased, and the opening degree of the first throttling device is decreased.

2. The anti-condensation air conditioning system according to claim 1, characterized in that, The throttling device further includes a third throttling device, which is disposed between one end of the second heat exchanger and the connecting component.

3. The anti-condensation air conditioning system according to claim 2, characterized in that, The communication component includes at least six interfaces: a first interface, a second interface, a third interface, a fourth interface, a fifth interface, and a sixth interface. The first interface is connected to the outlet of the compressor, the second interface is connected to one end of the outdoor heat exchange component, the third interface is connected to one end of the third throttling device, the fourth interface is connected to the inlet of the compressor, the fifth interface is connected to the other end of the outdoor heat exchange component, and the sixth interface is connected to one end of the first throttling device.

4. The anti-condensation air conditioning system according to claim 3, characterized in that, The first interface is selectively connected to the second interface or the sixth interface, the third interface is selectively connected to the second interface or the fourth interface, and the fifth interface is selectively connected to the fourth interface or the sixth interface.

5. A control method applied to the anti-condensation air conditioning system according to any one of claims 1-4, characterized in that, The refrigerant output from the compressor, controlled by the communication assembly, first enters the outdoor heat exchange assembly for heat release and cooling, then is throttled by the first throttling device, then enters the first heat exchanger for heat release, then is throttled by the second throttling device, and then enters the second heat exchanger for heat absorption, finally returning to the compressor through the communication assembly and circulating, including the following steps: Adjust the opening degree of the first throttling device and the second throttling device to the preset opening degree; Obtain the first temperature of the first heat exchanger and the second temperature of the second heat exchanger; Compare the first temperature with the preset temperature; If the first temperature is greater than the sum of a predetermined percentage of the preset temperature and a preset cooling deviation parameter, then the opening of the first throttling device is reduced; if the first temperature is less than the sum of a predetermined percentage of the preset temperature and the preset cooling deviation parameter, then the opening of the first throttling device is increased; if the first temperature is equal to the sum of a predetermined percentage of the preset temperature and the preset cooling deviation parameter, then the opening of the first throttling device is maintained. Compare the second temperature with 0°C; If the second temperature is greater than the sum of 0°C and the preset cooling deviation parameter, the opening of the second throttling device is increased; if the second temperature is less than the sum of 0°C and the preset cooling deviation parameter, the opening of the second throttling device is decreased; if the second temperature is equal to the sum of 0°C and the preset cooling deviation parameter, the opening of the second throttling device is maintained.

6. A control method applied to the anti-condensation air conditioning system according to any one of claims 2-4, characterized in that, include: Receive command to enter heating mode; The refrigerant output from the compressor is controlled to pass through the connecting component, first through the first throttling device to enter the first heat exchanger to release heat, then through the second throttling device to enter the second heat exchanger to release heat, then through the third throttling device to enter the outdoor heat exchange component to absorb heat, and finally through the connecting component back into the compressor and circulates. In the circulation process, the refrigerant and air flow in opposite directions in the first heat exchanger and the second heat exchanger. The second heat exchanger first heats the air, and then the first heat exchanger further heats the air heated by the second heat exchanger.

7. The control method according to claim 6, characterized in that, The refrigerant output from the compressor, controlled by the connecting assembly, first passes through the first throttling device into the first heat exchanger to release heat, then passes through the second throttling device into the second heat exchanger to release heat, then passes through the third throttling device and enters the outdoor heat exchange assembly to absorb heat, and finally returns to the compressor through the connecting assembly, circulating in a cycle, including the following steps: Adjust the opening degree of the third throttling device to a preset opening degree; Obtain the second temperature of the second heat exchanger; Compare the second temperature with the preset temperature; If the second temperature is greater than the sum of a predetermined percentage of the preset temperature and a preset heating deviation parameter, the opening of the third throttling device is increased; if the second temperature is less than the sum of a predetermined percentage of the preset temperature and a preset heating deviation parameter, the opening of the third throttling device is decreased; if the second temperature is equal to the sum of a predetermined percentage of the preset temperature and a preset heating deviation parameter, the opening of the third throttling device is maintained.

8. The control method according to claim 6, characterized in that, It also includes the following steps: Receives cooling that has entered heating / defrosting mode; Decrease the opening of the second throttling device and increase the opening of the third throttling device to lower the refrigerant temperature of the second heat exchanger and raise the refrigerant temperature of the outdoor heat exchange component.

9. The control method according to claim 8, characterized in that, The steps of reducing the opening of the second throttling device and increasing the opening of the third throttling device to lower the refrigerant temperature of the second heat exchanger and raise the refrigerant temperature of the outdoor heat exchange component include the following: Increase the opening degree of the first throttling device and the second throttling device to the maximum opening degree; Obtain the third temperature of the outdoor heat exchange component and the outdoor temperature; The outdoor temperature is compared with a first specified temperature and a second specified temperature, and the third temperature is compared with 0°C, wherein the first specified temperature is a positive temperature and the second specified temperature is a negative temperature; If the outdoor temperature is greater than or equal to the second specified temperature, less than or equal to the first specified temperature, and the third temperature is always less than 0°C for a continuous period of time, or if the outdoor temperature is less than or equal to the second specified temperature, and the third temperature is always less than 0°C for a continuous period of time, then the current opening degree of the third throttling device is obtained. Adjust the opening degree of the second throttling device to the current opening degree of the third throttling device, and increase the opening degree of the third throttling device to the maximum opening degree; Compare the third temperature with the third specified temperature; If the third temperature is greater than the third specified temperature, the opening degree of the third throttling device is adjusted to the current opening degree of the second throttling device, and the second throttling device is increased to its maximum opening degree.

Images