An air duct auxiliary heating device, an air conditioner and a temperature compensation control method

Abstract

The application provides a kind of air duct auxiliary heating device, air conditioner and temperature compensation control method, it is related to air conditioning technical field.The air duct auxiliary heating device includes mutually connected electric auxiliary heating element and auxiliary heating heat exchanger, auxiliary heating heat exchanger and electric auxiliary heating element are configured in the air duct of air conditioner, auxiliary heating heat exchanger is used to be connected in parallel with the indoor heat exchanger of air conditioner by pipeline, to guide the part of refrigerant before entering indoor heat exchanger and the air outlet heat exchange of air conditioner.The air duct auxiliary heating device provided by the application can improve the heat exchange capacity of air outlet during the heating process of air conditioner, and can improve the cooling capacity of air outlet during the refrigeration process.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a duct auxiliary heating device, an air conditioner, and a temperature compensation control method. Background Technology

[0002] Air conditioners typically have an electric heating device installed in the air duct. When the outdoor temperature is too low and the cooling load is too high, the heat exchange of the air can be increased by turning on the electric heating device.

[0003] However, electric heating devices have limited functionality, resulting in poor heating of the exhaust air during the heating process, meaning low heat exchange, and they cannot increase the cooling capacity of the exhaust air during the cooling process. Summary of the Invention

[0004] The problem solved by this invention is that the electric heating device arranged in the air duct of the air conditioner has low heat exchange capacity and cannot increase the cooling capacity during the cooling process.

[0005] To address the aforementioned problems, this invention provides an auxiliary heating device for air ducts, which can increase the heat exchange of the air outlet during the heating process and increase the cooling capacity of the air outlet during the cooling process.

[0006] An embodiment of the present invention provides a duct auxiliary heating device for use in an air conditioner. The duct auxiliary heating device includes an electric auxiliary heating element and an auxiliary heat exchanger connected to each other. Both the auxiliary heat exchanger and the electric auxiliary heating element are configured to be installed in the duct of the air conditioner. The auxiliary heat exchanger is used to be connected in parallel with the indoor heat exchanger of the air conditioner through a pipeline to guide a portion of the refrigerant before it enters the indoor heat exchanger to exchange heat with the air outlet of the air conditioner.

[0007] The duct auxiliary heating device provided in this embodiment of the invention, in practical applications, connects the auxiliary heat exchanger in parallel with the indoor heat exchanger of the air conditioner via pipelines. When the air conditioner is running in cooling or heating mode, a portion of the refrigerant flows into the auxiliary heat exchanger before entering the indoor heat exchanger for heat exchange, thereby achieving heat exchange with the outlet air within the duct and compensating for the indoor heat exchanger's heat exchange. Furthermore, the auxiliary heat exchanger is connected to an electric auxiliary heating element, which enhances the heat exchange capacity of the electric auxiliary heating element, increasing the heat exchange area and improving both heat and cooling capacity. Therefore, the duct auxiliary heating device provided in this embodiment of the invention can increase the heat exchange capacity of the outlet air during heating and increase the cooling capacity of the outlet air during cooling.

[0008] In an optional embodiment, the auxiliary heat exchanger includes a first tube layer and a second tube layer arranged in parallel, the electric auxiliary heating element is disposed between the first tube layer and the second tube layer, one end of the first tube layer and the second tube layer are connected, and the other end of each is used to be connected to both ends of the indoor heat exchanger respectively.

[0009] The electric auxiliary heating element is arranged between the first and second pipe layers. The first and second pipe layers are used for the circulation of refrigerant for heat exchange, thereby enhancing the heat exchange capacity of the electric auxiliary heating element, increasing the heat exchange area of ​​the overall structure, and thus increasing the heat exchange or cooling capacity of the outlet air.

[0010] In an optional embodiment, the auxiliary heat exchanger further includes a first fin layer and a second fin layer, wherein the first tube layer, the first fin layer, the electric auxiliary heating element, the second fin layer and the second tube layer are stacked sequentially, and both the first fin layer and the second fin layer are provided with multiple fins.

[0011] The first tube layer, the first fin layer, the electric auxiliary heating element, the second fin layer, and the second tube layer are stacked sequentially. The first fin layer and the second fin layer increase the heat exchange area of ​​the electric auxiliary heating element, and also increase the heat exchange area between the first tube layer and the second tube layer. The first tube layer is connected to the electric auxiliary heating element through the first fin layer, and the second tube layer is connected to the electric auxiliary heating element through the second fin layer, realizing mutual temperature compensation between the electric auxiliary heating element and the two tube layers, and improving the heat exchange and cooling effect.

[0012] In an optional embodiment, the first tube layer includes an inlet manifold and a plurality of first heat exchange tubes, one end of each of the plurality of first heat exchange tubes being connected to the inlet manifold, and the inlet manifold being used to connect to one end of the indoor heat exchanger.

[0013] The second tube layer includes an outlet manifold and a plurality of second heat exchange tubes. One end of each of the plurality of second heat exchange tubes is connected to the outlet manifold, and the other end of each of the plurality of second heat exchange tubes is connected to the other end of each of the plurality of first heat exchange tubes through a pipeline. The outlet manifold is used to connect to the other end of the indoor heat exchanger.

[0014] In an optional embodiment, a first control valve is provided on the inlet manifold, and a second control valve is provided on the outlet manifold. Both the first control valve and the second control valve are used to be electrically connected to the controller of the air conditioner so as to open or close under the control of the controller.

[0015] In an optional embodiment, the duct auxiliary heating device further includes a heat storage heat exchanger, which is provided with a first pipeline and a second pipeline. The first pipeline and the auxiliary heat exchanger are connected in parallel to form a closed loop flow path. The second pipeline is used to connect with the outdoor heat storage module of the air conditioner and to guide the phase change medium of the outdoor heat storage module to exchange heat with the refrigerant in the first pipeline.

[0016] In cooling mode, the outdoor heat storage module absorbs heat through a phase change medium. This heat can come from the high-temperature gas after heat exchange in the outdoor heat exchanger, the heat dissipation of the electrical control equipment, and the heat from the outdoor air. The high-temperature phase change medium introduced into the outdoor heat storage module heats the refrigerant in the auxiliary heat exchanger, thereby heating the electric auxiliary heating element and the auxiliary heat exchanger. This prevents the electric auxiliary heating element and the auxiliary heat exchanger from becoming too cold due to direct exposure to cold air in cooling mode, which could lead to excessive temperature difference between them and the indoor air after shutdown, causing condensation.

[0017] In an optional embodiment, a third control valve is provided at one end of the first pipeline and a fourth control valve is provided at the other end of the first pipeline. Both the third control valve and the fourth control valve are used to be electrically connected to the controller of the air conditioner so as to open or close under the control of the controller.

[0018] The air conditioner's controller coordinates the control of the first, second, third, and fourth control valves according to various operating conditions to improve the heat exchange and cooling effect and prevent condensation from forming in the air duct.

[0019] In an optional embodiment, the heat storage heat exchanger includes a heat transfer cylinder, with the first pipe spirally wound around the outer wall of the heat transfer cylinder, and one end of the second pipe passing through the heat transfer cylinder.

[0020] In an optional embodiment, the second conduit extends in a spiral shape within the heat transfer cylinder.

[0021] The present invention also provides an air conditioner, including an air conditioner body, a controller, an indoor heat exchanger, an outdoor heat storage module, and an auxiliary heating device for the air duct. The auxiliary heating device for the air duct includes a heat storage heat exchanger and an electric auxiliary heating element and an auxiliary heat exchanger connected to each other. The auxiliary heat exchanger and the electric auxiliary heating element are both disposed in the air duct of the air conditioner body. The auxiliary heat exchanger includes a heat exchange tube layer and a fin layer. The heat exchange tube layer is connected to the electric auxiliary heating element through the fin layer. The two ends of the heat exchange tube layer are respectively connected in parallel with the indoor heat exchanger through a first control valve and a second control valve. The heat storage heat exchanger includes a first pipeline and a second pipeline. The two ends of the first pipeline are respectively provided with a third control valve and a fourth control valve. The first pipeline is connected in parallel with the auxiliary heat exchanger through the third control valve and the fourth control valve. The second pipeline is connected to the outdoor heat storage module and is used to guide the phase change medium of the outdoor heat storage module to exchange heat with the refrigerant in the first pipeline.

[0022] The controller is electrically connected to the first control valve, the second control valve, the third control valve, and the fourth control valve, respectively.

[0023] In practical applications, the air conditioner provided in this embodiment of the invention features an auxiliary heat exchanger connected in parallel with the indoor heat exchanger via piping. When the air conditioner operates in cooling or heating mode, a portion of the refrigerant flows into the auxiliary heat exchanger before entering the indoor heat exchanger for heat exchange. This allows for heat exchange of the outlet air within the duct, compensating for the reduced heat in the indoor heat exchanger. Furthermore, the auxiliary heat exchanger is connected to an electric auxiliary heating element, enhancing its heat exchange capacity, increasing the heat exchange area, and improving both heat and cooling capacity. Therefore, the duct auxiliary heating device provided in this embodiment of the invention can increase the heat exchange of the outlet air during heating and the cooling capacity of the outlet air during cooling. Moreover, the heat storage heat exchanger selectively heats the electric auxiliary heating element and the auxiliary heat exchanger in cooling mode, preventing excessively low temperatures and large temperature differences between the electric auxiliary heating element / heat exchanger and the indoor air, which could lead to condensation.

[0024] This invention also provides a temperature compensation control method applied to the aforementioned air conditioner. The air conditioner includes an air conditioning unit, a controller, an indoor heat exchanger, an outdoor heat storage module, and an auxiliary heating device for the air duct. The auxiliary heating device for the air duct includes a heat storage heat exchanger and an electric auxiliary heating element and an auxiliary heat exchanger connected to each other. The auxiliary heat exchanger and the electric auxiliary heating element are both disposed in the air duct of the air conditioning unit. The auxiliary heat exchanger includes a heat exchange tube layer and a fin layer. The heat exchange tube layer is connected to the electric auxiliary heating element through the fin layer. The two ends of the heat exchange tube layer are connected in parallel with the indoor heat exchanger through a first control valve and a second control valve, respectively. The heat storage heat exchanger includes a first pipeline and a second pipeline. The two ends of the first pipeline are respectively provided with a third control valve and a fourth control valve. The first pipeline is connected in parallel with the auxiliary heat exchanger through the third control valve and the fourth control valve. The second pipeline is connected to the outdoor heat storage module and is used to guide the phase change medium of the outdoor heat storage module to exchange heat with the refrigerant in the first pipeline.

[0025] The controller is electrically connected to the first control valve, the second control valve, the third control valve and the fourth control valve respectively;

[0026] The temperature compensation control method includes:

[0027] In heating mode, the first control valve and the second control valve are opened, and the third control valve and the fourth control valve are closed.

[0028] In cooling mode, the first control valve, the second control valve, the third control valve and the fourth control valve are opened or closed according to the indoor air humidity, indoor air temperature, fin layer temperature, fin layer condensation, and indoor air dew point temperature, respectively.

[0029] In dehumidification mode, the first control valve, the second control valve, the third control valve and the fourth control valve are opened or closed according to the indoor air temperature, the fin layer temperature, the condensation amount of the fin layer and the indoor air dew point temperature, respectively.

[0030] If the air conditioner is turned off in cooling mode or dehumidification mode, the first control valve and the second control valve are closed, and the third control valve and the fourth control valve are opened. The third control valve and the fourth control valve are selectively closed according to the fin layer temperature, the condensation amount of the fin layer and the indoor air dew point temperature.

[0031] In an optional implementation, the step of controlling the first control valve, the second control valve, the third control valve, and the fourth control valve to open or close respectively in cooling mode based on indoor air humidity, indoor air temperature, fin layer temperature, fin layer condensation, and indoor air dew point temperature includes:

[0032] In cooling mode, if the indoor air humidity is less than or equal to 75%, and the fin layer temperature is less than or equal to the sum of the indoor air dew point temperature and the first preset value for a first preset duration, or the indoor air temperature is less than or equal to the sum of the target temperature and the second preset value for a second preset duration, then the first control valve and the second control valve are controlled to close, and the third control valve and the fourth control valve are controlled to open.

[0033] In cooling mode, if the indoor air humidity is less than or equal to 75%, and if the condensation on the fin layer is less than or equal to the third preset value for a third preset duration, and if the condensation on the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the fourth preset value for a fourth preset duration, then the first control valve and the second control valve are controlled to open, and the third control valve and the fourth control valve are controlled to close.

[0034] In an optional embodiment, the step of controlling the first control valve, the second control valve, the third control valve, and the fourth control valve to open or close respectively based on indoor air humidity, indoor air temperature, fin layer temperature, fin layer condensation, and indoor air dew point temperature in cooling mode further includes:

[0035] In cooling mode, if the indoor air humidity is greater than 75%, and the fin layer temperature is less than or equal to the sum of the indoor air dew point temperature and the fifth preset value for a continuous fifth preset duration, or the indoor air temperature is less than or equal to the sum of the target temperature and the sixth preset value for a continuous sixth preset duration, then the first control valve and the second control valve are controlled to close, and the third control valve and the fourth control valve are controlled to open.

[0036] In cooling mode, if the indoor air humidity is greater than 75%, and the condensation on the fin layer is less than or equal to the seventh preset value for a continuous seventh preset duration, and the temperature of the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the eighth preset value for a continuous eighth preset duration, then the first control valve and the second control valve are controlled to open, and the third control valve and the fourth control valve are controlled to close.

[0037] In an optional implementation, the step of controlling the first control valve, the second control valve, the third control valve, and the fourth control valve to open or close respectively based on the indoor air temperature, the fin layer temperature, the condensation amount of the fin layer, and the indoor air dew point temperature in dehumidification mode includes:

[0038] In dehumidification mode, if the temperature of the fin layer is less than or equal to the sum of the indoor air dew point temperature and the ninth preset value for a continuous ninth preset duration, or if the temperature of the indoor air is less than or equal to the sum of the target temperature and the tenth preset value for a continuous tenth preset duration, then the first control valve and the second control valve are controlled to close, and the third control valve and the fourth control valve are controlled to open.

[0039] In dehumidification mode, if the condensation amount of the fin layer is less than or equal to the eleventh preset value for an eleventh preset duration, and the temperature of the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the twelfth preset value for a twelfth preset duration, then the first control valve and the second control valve are controlled to open, and the third control valve and the fourth control valve are controlled to close.

[0040] In an optional embodiment, the step of selectively controlling the closure of the third control valve and the fourth control valve based on the fin layer temperature, the condensation amount of the fin layer, and the indoor air dew point temperature includes:

[0041] If the condensation amount of the fin layer is less than or equal to the thirteenth preset value for a continuous thirteenth preset duration, and the temperature of the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the fourteenth preset value for a continuous fourteenth preset duration, then the third control valve and the fourth control valve will be closed. Attached Figure Description

[0042] Figure 1 This is an exploded view of an air conditioner provided in an embodiment of the present invention;

[0043] Figure 2 A structural block diagram of an air conditioner provided in an embodiment of the present invention;

[0044] Figure 3 for Figure 1A schematic diagram of the connection structure between the heat storage heat exchanger of the auxiliary heating device in the central air duct and the outdoor heat storage module.

[0045] Figure 4 for Figure 1 A schematic diagram of the connection structure between the auxiliary heat exchanger and the electric auxiliary heating element of the central air duct auxiliary heating device.

[0046] Figure 5 A flowchart illustrating the temperature compensation control method provided in an embodiment of the present invention;

[0047] Figure 6 for Figure 5 Flowchart of the sub-steps in step S102;

[0048] Figure 7 for Figure 5 Flowchart of the sub-step in step S103;

[0049] Figure 8 for Figure 5 The flowchart of the sub-step of step S104.

[0050] Explanation of reference numerals in the attached figures:

[0051] 10-Air conditioner; 11-Controller; 12-Indoor heat exchanger; 13-Outdoor heat storage module; 100-Auxiliary heating device for air duct; 110-Electric auxiliary heating element; 130-Auxiliary heat exchanger; 131-First pipe layer; 1311-Inlet manifold; 1312-First control valve; 1313-First heat exchange tube; 133-Second pipe layer; 1331-Outlet manifold; 1332-Second control valve; 1333-Second heat exchange tube; 135-First fin layer; 137-Second fin layer; 150-Heat storage heat exchanger; 151-Heat transfer cylinder; 153-First pipeline; 1531-Third control valve; 1532-Fourth control valve; 155-Second pipeline. Detailed Implementation

[0052] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] Please refer to the following: Figure 1 , Figure 2 and Figure 3 This embodiment provides an air conditioner 10, including an air conditioner body (not shown in the figure), a controller 11, an indoor heat exchanger 12, an outdoor heat storage module 13, an auxiliary heating device 100 for air ducts, and other conventional components. The auxiliary heating device 100 for air ducts is arranged in the air duct of the air conditioner body and is connected in parallel with the indoor heat exchanger 12 through a pipeline. The controller 11 is electrically connected to the auxiliary heating device 100 for selectively controlling the auxiliary heating device 100 to divert a portion of the refrigerant flowing into the indoor heat exchanger 12 into the air duct for heat exchange with the outlet air.

[0054] The duct auxiliary heating device 100 includes an electric auxiliary heating element 110, an auxiliary heat exchanger 130, and a heat storage heat exchanger 150. The electric auxiliary heating element 110 is connected to the auxiliary heat exchanger 130 and is installed in the duct of the air conditioning unit. The two ends of the auxiliary heat exchanger 130 are connected in parallel with the indoor heat exchanger 12 through pipes. The heat storage heat exchanger 150 is connected in parallel with the auxiliary heat exchanger 130 through pipes. It is used to introduce the high-temperature phase change medium of the outdoor heat storage module 13 to heat the refrigerant flowing through the auxiliary heat exchanger 130, thereby heating the auxiliary heat exchanger 130 and the electric auxiliary heating element 110 and avoiding condensation in the cooling mode.

[0055] Please refer to the following: Figure 1 and Figure 4 The auxiliary heat exchanger 130 includes a heat exchange tube layer and a fin layer. The heat exchange tube layer is connected to the electric auxiliary heating element 110 through the fin layer. In this embodiment, the heat exchange tube layer includes a first tube layer 131 and a second tube layer 133, and the fin layer includes a first fin layer 135 and a second fin layer 137. Both the first fin layer 135 and the second fin layer 137 are provided with multiple fins. The first tube layer 131, the first fin layer 135, the electric auxiliary heating element 110, the second fin layer 137, and the second tube layer 133 are stacked sequentially. One end of the first tube layer 131 and the second tube layer 133 are connected, and the other end of each is used to connect to both ends of the indoor heat exchanger 12.

[0056] It is understandable that the two opposite sides of the electric auxiliary heating element 110 are connected to the first tube layer 131 via the first fin layer 135 and to the second tube layer 133 via the second fin layer 137, respectively, to achieve mutual temperature compensation between the electric auxiliary heating element 110 and the two tube layers, thereby improving the heat exchange and cooling effect. Furthermore, the first fin layer 135 and the second fin layer 137 increase the heat exchange area of ​​the electric auxiliary heating element 110, and also increase the heat exchange area between the first tube layer 131 and the second tube layer 133, further enhancing the heat exchange capacity in heating mode and the cooling capacity in cooling mode.

[0057] In this embodiment, the first tube layer 131 includes an inlet manifold 1311 and a plurality of parallel first heat exchange tubes 1313. One end of each of the plurality of first heat exchange tubes 1313 is connected to the inlet manifold 1311, and the inlet manifold 1311 is used to connect to one end of the indoor heat exchanger 12. The second tube layer 133 includes an outlet manifold 1331 and a plurality of parallel second heat exchange tubes 1333. One end of each of the plurality of second heat exchange tubes 1333 is connected to the outlet manifold 1331, and the other end of each of the plurality of second heat exchange tubes 1333 is connected to the other end of each of the plurality of first heat exchange tubes 1313 through a pipeline. The outlet manifold 1331 is used to connect to the other end of the indoor heat exchanger 12.

[0058] A first control valve 1312 is provided on the inlet manifold 1311, and a second control valve 1332 is provided on the outlet manifold 1331. Both the first control valve 1312 and the second control valve 1332 are used to be electrically connected to the controller 11 of the air conditioner 10 so as to be opened or closed under the control of the controller 11.

[0059] In practical applications, the air conditioner 10 operates in either cooling or heating mode. When the controller 11 opens the first control valve 1312 and the second control valve 1332, a portion of the refrigerant flowing into the indoor heat exchanger 12 enters the auxiliary heat exchanger 130 via the inlet manifold 1311 or the outlet manifold 1331. If it flows in through the inlet manifold 1311, it passes through the first pipe layer 131 and the second pipe layer 133 in sequence, and finally flows out through the outlet manifold 1331 to merge with the refrigerant flowing out of the indoor heat exchanger 12. If it flows in through the outlet manifold 1331, it passes through the second pipe layer 133 and the first pipe layer 131 in sequence, and finally flows out through the inlet manifold 1311 to merge with the refrigerant flowing out of the indoor heat exchanger 12.

[0060] It is understood that the controller 11 is electrically connected to the electric auxiliary heating element 110 and is used to control the start-up or shutdown of the electric auxiliary heating element 110. In heating mode, if the outdoor temperature is too low or the cooling load is too high, the controller 11 controls the electric auxiliary heating element 110 to start and controls the first control valve 1312 and the second control valve 1332 to open. When part of the high-temperature refrigerant flowing into the indoor heat exchanger 12 passes through the first pipe layer 131 and the second pipe layer 133, it works together with the electric auxiliary heating element 110 to heat the outlet air, increase the heat exchange area, and increase the heat exchange capacity.

[0061] In cooling mode, the controller 11 controls the electric auxiliary heating element 110 to stop. The controller 11 can selectively control the first control valve 1312 and the second control valve 1332 to open according to other operating conditions. This allows some of the low-temperature refrigerant flowing into the indoor heat exchanger 12 to cool the outlet air through the first fin layer 135, the second fin layer 137 and the electric auxiliary heating element 110 when passing through the first pipe layer 131 and the second pipe layer 133. This increases the heat exchange area and the cooling capacity, thereby compensating for the indoor heat exchanger 12.

[0062] Please continue reading. Figure 1 and Figure 3 The heat storage heat exchanger 150 includes a heat transfer cylinder 151, a first pipe 153 and a second pipe 155. The first pipe 153 is spirally wound around the outer wall of the heat transfer cylinder 151. One end of the second pipe 155 passes through the heat transfer cylinder 151, and in this embodiment, the second pipe 155 extends in a spiral shape inside the heat transfer cylinder 151.

[0063] One end of the first pipeline 153 is connected to the position between the first control valve 1312 and the first pipe layer 131 on the inlet manifold 1311, and communicates with the inside of the inlet manifold 1311. The other end of the first pipeline 153 is connected to the position between the second control valve 1332 and the second pipe layer 133 on the outlet manifold 1331, and communicates with the inside of the outlet manifold 1331. A third control valve 1531 and a fourth control valve 1532 are respectively provided at both ends of the first pipeline 153.

[0064] The controller 11 is also electrically connected to the third control valve 1531 and the fourth control valve 1532 respectively. When the controller 11 controls the first control valve 1312, the second control valve 1332, the third control valve 1531 and the fourth control valve 1532 to be open, the first pipe 153 is connected in parallel with the first pipe layer 131 and the second pipe layer 133. When the controller 11 controls the first control valve 1312 and the second control valve 1332 to be closed and controls the third control valve 1531 and the fourth control valve 1532 to be open, the first pipe 153 forms a closed loop with the first pipe layer 131 and the second pipe layer 133, and refrigerant flows in the first pipe 153.

[0065] The two ends of the second pipe 155 are connected to the outdoor heat storage module 13, respectively, to guide the high-temperature phase change medium of the outdoor heat storage module 13. When the controller 11 controls the first control valve 1312 and the second control valve 1332 to be closed, and controls the third control valve 1531 and the fourth control valve 1532 to be open, the high-temperature phase change medium in the second pipe 155 exchanges heat with the refrigerant in the first pipe 153 through the heat transfer cylinder 151, thereby heating the refrigerant and thus heating the first pipe layer 131, the first fin layer 135, the electric auxiliary heating element 110, the second fin layer 137, and the second pipe layer 133. This prevents the temperature of the first pipe layer 131, the first fin layer 135, the electric auxiliary heating element 110, the second fin layer 137, and the second pipe layer 133 from becoming too low after the cooling or dehumidification mode ends, thus avoiding condensation due to a large temperature difference with the indoor air.

[0066] It should be noted that the opening and closing control of the first control valve 1312, the second control valve 1332, the third control valve 1531, and the fourth control valve 1532 by the controller 11 is affected by various operating conditions. For example, when the controller 11 determines, based on various operating conditions, that the electric auxiliary heating element 110 and the auxiliary heat exchanger 130 are in cooling mode or when condensation occurs, it controls the first control valve 1312 and the second control valve 1332 to close, and controls the third control valve 1531 and the fourth control valve 1532 to open.

[0067] As can be seen, the air conditioner 10 provided in this embodiment can increase the heat exchange of the air during the heating process, increase the cooling capacity of the air during the cooling process, and prevent water blowing, thereby improving the user experience.

[0068] Please see Figure 5 This embodiment also provides a temperature compensation control method, applied to the aforementioned air conditioner 10, which includes the following steps:

[0069] In step S101, in heating mode, the first control valve 1312 and the second control valve 1332 are opened, and the third control valve 1531 and the fourth control valve 1532 are closed.

[0070] In step S102, under cooling mode, the first control valve 1312, the second control valve 1332, the third control valve 1531 and the fourth control valve 1532 are opened or closed according to the indoor air humidity, indoor air temperature, fin layer temperature, fin layer condensation, and indoor air dew point temperature.

[0071] Please see Figure 6 Step S102 may include the following sub-steps:

[0072] In sub-step S1021, under the cooling mode and when the indoor air humidity is less than or equal to 75%, if the fin layer temperature is less than or equal to the sum of the indoor air dew point temperature and the first preset value for a continuous first preset duration, or if the indoor air temperature is less than or equal to the sum of the target temperature and the second preset value for a continuous second preset duration, then the first control valve 1312 and the second control valve 1332 are closed, and the third control valve 1531 and the fourth control valve 1532 are opened.

[0073] In practical applications, when the indoor air humidity is detected to be less than or equal to 75% in cooling mode, indicating that the current indoor air humidity is not prone to condensation, the first control valve 1312 and the second control valve 1332 are first opened, while the third control valve 1531 and the fourth control valve 1532 are closed. This allows the refrigerant to flow into the auxiliary heat exchanger 130, which compensates for the heat exchange in the indoor heat exchanger 12 and increases the cooling capacity. Furthermore, the first control valve 1312, the second control valve 1332, the third control valve 1531, and the fourth control valve 1532 are simultaneously adjusted based on various acquired operating parameters.

[0074] Multiple operating parameters include indoor air humidity, indoor air temperature, fin layer temperature, fin layer condensation, and indoor air dew point temperature. Indoor air humidity is obtained by a humidity detection device installed in the indoor environment. Indoor air temperature is obtained by a temperature sensor installed in the indoor environment. Fin layer temperature is obtained by a temperature sensor installed on the first fin layer 135 and / or the second fin layer 137. Fin layer condensation is obtained by a condensation sensor installed on the first fin layer 135 and the second fin layer 137. Indoor air dew point temperature is obtained by a dew point temperature meter installed in the indoor environment.

[0075] If it is detected that the fin layer temperature is less than or equal to the sum of the indoor air dew point temperature and the first preset value for a continuous first preset duration, it indicates that the fin layer temperature is too low. It is highly likely that condensation will occur on the auxiliary heat exchanger 130 and the electric auxiliary heating element 110 when they come into contact with the indoor air after the cooling stops. In this case, the controller 11 controls the first control valve 1312 and the second control valve 1332 to close, and controls the third control valve 1531 and the fourth control valve 1532 to open, so as to heat the auxiliary heat exchanger 130 and the electric auxiliary heating element 110 and avoid condensation due to the large temperature difference between the auxiliary heat exchanger 130 and the indoor air after the cooling stops.

[0076] If the indoor air temperature is detected to be less than or equal to the sum of the target temperature and the second preset value for a continuous second preset duration, indicating that the indoor air temperature is about to reach the target temperature, the controller 11 immediately controls the first control valve 1312 and the second control valve 1332 to close, and controls the third control valve 1531 and the fourth control valve 1532 to open, so as to preheat the auxiliary heat exchanger 130 and the electric auxiliary heating element 110, to prevent the high indoor temperature from entering the air duct and coming into contact with the auxiliary heat exchanger 130 and the electric auxiliary heating element 110 after the cooling reaches the target temperature, thus preventing condensation.

[0077] In this embodiment, when the fin layer temperature is less than or equal to 20°C, the first preset value is 1°C and the first preset duration is 60 seconds; when the fin layer temperature is greater than 20°C, the first preset value is 1.5°C and the first preset duration is 40 seconds. Furthermore, when the indoor air temperature is less than or equal to 25°C, the second preset value is 0.5°C and the second preset duration is 30 seconds; when the indoor air temperature is greater than 25°C, the second preset value is 1°C and the second preset duration is 4 seconds.

[0078] In sub-step S1022, under the cooling mode and when the indoor air humidity is less than or equal to 75%, if the condensation amount of the fin layer is less than or equal to the third preset value for a continuous third preset duration, and the fin layer temperature is greater than or equal to the sum of the indoor air dew point temperature and the fourth preset value for a continuous fourth preset duration, then the first control valve 1312 and the second control valve 1332 are opened, and the third control valve 1531 and the fourth control valve 1532 are closed.

[0079] In cooling mode, if the indoor air humidity is detected to be less than or equal to 75% for a third preset duration, if the condensation on the fin layer is detected to be less than or equal to the third preset value, and if the fin layer temperature is detected to be greater than or equal to the sum of the indoor air dew point temperature and the fourth preset value for a fourth preset duration, it indicates that the existing condensation is within the allowable range and the fin layer temperature is suitable, and no condensation will occur after cooling is completed. Therefore, the first control valve 1312 and the second control valve 1332 are opened, and the third control valve 1531 and the fourth control valve 1532 are closed to increase the cooling capacity.

[0080] In this embodiment, the third preset value is 0.1g, the third preset duration is 60s, the fourth preset value is 2℃, and the fourth preset duration is 75s.

[0081] In sub-step S1023, under the cooling mode and when the indoor air humidity is greater than 75%, if the fin layer temperature is less than or equal to the sum of the indoor air dew point temperature and the fifth preset value for a continuous fifth preset duration, or if the indoor air temperature is less than or equal to the sum of the target temperature and the sixth preset value for a continuous sixth preset duration, then the first control valve 1312 and the second control valve 1332 are closed, and the third control valve 1531 and the fourth control valve 1532 are opened.

[0082] When the indoor air humidity is detected to be greater than 75% in the cooling mode, indicating that the current indoor air humidity is prone to condensation, the first control valve 1312 and the second control valve 1332 are closed, and the third control valve 1531 and the fourth control valve 1532 are opened to achieve heating and anti-condensation of the auxiliary heat exchanger 130 and the electric auxiliary heating element 110.

[0083] Furthermore, the execution logic for subsequently controlling the first control valve 1312 and the second control valve 1332 to remain closed, and controlling the third control valve 1531 and the fourth control valve 1532 to remain open refers to sub-step S1021. In this embodiment, the fifth preset duration is 30s, the fifth preset value is 2℃, the sixth preset duration is 60s, and the sixth preset value is 2℃.

[0084] In sub-step S1024, under the cooling mode and when the indoor air humidity is greater than 75%, if the condensation amount of the fin layer is less than or equal to the seventh preset value for a continuous seventh preset duration, and the fin layer temperature is greater than or equal to the sum of the indoor air dew point temperature and the eighth preset value for a continuous eighth preset duration, then the first control valve 1312 and the second control valve 1332 are controlled to open, and the third control valve 1531 and the fourth control valve 1532 are controlled to close.

[0085] The execution logic for subsequently controlling the opening of the first control valve 1312 and the second control valve 1332, and controlling the closing of the third control valve 1531 and the fourth control valve 1532 is referred to sub-step S1022. In this embodiment, the seventh preset duration is 120s, the seventh preset value is 0.05g, the eighth preset duration is 125s, and the eighth preset value is 2℃.

[0086] Please continue reading. Figure 5 Furthermore, the temperature compensation control method may also include:

[0087] Step S103: In dehumidification mode, the first control valve 1312, the second control valve 1332, the third control valve 1531 and the fourth control valve 1532 are opened or closed according to the indoor air temperature, the fin layer temperature, the condensation amount of the fin layer and the indoor air dew point temperature, respectively.

[0088] The control criteria for the first control valve 1312, the second control valve 1332, the third control valve 1531, and the fourth control valve 1532 in dehumidification mode are the same as those for the indoor air humidity being detected to be greater than 75% in cooling mode.

[0089] Please see Figure 7 Step S103 may include the following sub-steps:

[0090] In sub-step S1031, under dehumidification mode, if the fin layer temperature is less than or equal to the sum of the indoor air dew point temperature and the ninth preset value for a continuous ninth preset duration, or if the indoor air temperature is less than or equal to the sum of the target temperature and the tenth preset value for a continuous tenth preset duration, then the first control valve 1312 and the second control valve 1332 are closed, and the third control valve 1531 and the fourth control valve 1532 are opened.

[0091] It is understood that in this embodiment, the ninth preset duration is equal to the fifth preset duration of 30s, the ninth preset value is equal to the fifth preset value of 2℃, the tenth preset duration is equal to the sixth preset duration of 60s, and the tenth preset value is equal to the sixth preset value of 2℃.

[0092] In sub-step S1032, under dehumidification mode, if the condensation amount of the fin layer is less than or equal to the eleventh preset value for an eleventh preset duration, and the fin layer temperature is greater than or equal to the sum of the indoor air dew point temperature and the twelfth preset value for a twelfth preset duration, then the first control valve 1312 and the second control valve 1332 are opened, and the third control valve 1531 and the fourth control valve 1532 are closed.

[0093] It is understood that in this embodiment, the eleventh preset duration is equal to the seventh preset duration of 120s, the eleventh preset value is equal to the seventh preset value of 0.05g, the twelfth preset duration is equal to the eighth preset duration of 125s, and the twelfth preset value is equal to the eighth preset value of 2℃.

[0094] Please continue reading. Figure 5 Furthermore, the temperature compensation control method may also include:

[0095] Step S104: If the air conditioner 10 is turned off in cooling mode or dehumidification mode, control the first control valve 1312 and the second control valve 1332 to close, and control the third control valve 1531 and the fourth control valve 1532 to open. Selectively control the third control valve 1531 and the fourth control valve 1532 to close according to the fin layer temperature, the fin layer condensation amount and the indoor air dew point temperature.

[0096] When the air conditioner 10 is turned off in cooling or dehumidification mode, it indicates that the temperature of the auxiliary heat exchanger 130 and the electric auxiliary heating element 110 is low. After the air conditioner is turned off, the relatively warm indoor air enters the air duct and comes into contact with the cooler auxiliary heat exchanger 130 and the electric auxiliary heating element 110, which will cause condensation to form on them. Therefore, when the air conditioner is turned off in cooling or dehumidification mode, the first control valve 1312 and the second control valve 1332 are closed first, and the third control valve 1531 and the fourth control valve 1532 are opened to heat the auxiliary heat exchanger 130 and the electric auxiliary heating element 110 in time to prevent condensation.

[0097] Please see Figure 8 Step S104 may include the following sub-steps:

[0098] In sub-step S1041, if the condensation amount of the fin layer is less than or equal to the thirteenth preset value for a continuous thirteenth preset duration, and the temperature of the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the fourteenth preset value for a continuous fourteenth preset duration, then control the third control valve 1531 and the fourth control valve 1532 to close.

[0099] After the first control valve 1312 and the second control valve 1332 are closed, and the third control valve 1531 and the fourth control valve 1532 are opened, for a thirteenth preset time, the condensation amount of the fin layer is less than or equal to the thirteenth preset value, and for a fourteenth preset time, the fin layer temperature is greater than or equal to the sum of the indoor air dew point temperature and the fourteenth preset value. This indicates that the existing condensation amount is within the allowable range and the fin layer temperature is suitable, so no condensation will occur. Therefore, the third control valve 1531 and the fourth control valve 1532 are closed to stop heating the auxiliary heat exchanger 130 and the electric auxiliary heating element 110.

[0100] In summary, the temperature compensation control method provided in this embodiment achieves a reasonable increase in the heat exchange and cooling capacity of the air conditioner 10 by coordinating the control of the first control valve 1312, the second control valve 1332, the third control valve 1531 and the fourth control valve 1532 through various operating parameters, and avoids condensation and prevents water blowing.

[0101] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A duct auxiliary heating device, applied to an air conditioner (10), characterized in that, The duct auxiliary heating device (100) includes an electric auxiliary heating element (110) and an auxiliary heat exchanger (130) connected to each other. The auxiliary heat exchanger (130) and the electric auxiliary heating element (110) are both configured in the duct of the air conditioner (10). The auxiliary heat exchanger (130) is used to connect in parallel with the indoor heat exchanger (12) of the air conditioner (10) through a pipeline to guide part of the refrigerant before entering the indoor heat exchanger (12) to exchange heat with the air outlet of the air conditioner (10). The auxiliary heat exchanger (130) includes a first tube layer (131) and a second tube layer (133) arranged in parallel. The electric auxiliary heating element (110) is disposed between the first tube layer (131) and the second tube layer (133). One end of the first tube layer (131) and the second tube layer (133) are connected, and the other end of each is used to connect to both ends of the indoor heat exchanger (12). The auxiliary heat exchanger (130) further includes a first fin layer (135) and a second fin layer (137). The first tube layer (131), the first fin layer (135), the electric auxiliary heating element (110), the second fin layer (137) and the second tube layer (133) are stacked in sequence. Both the first fin layer (135) and the second fin layer (137) are provided with multiple fins. The first tube layer (131) includes an inlet manifold (1311) and a plurality of first heat exchange tubes (1313). One end of each of the plurality of first heat exchange tubes (1313) is connected to the inlet manifold (1311), and the inlet manifold (1311) is used to connect to one end of the indoor heat exchanger (12). The second tube layer (133) includes an outlet manifold (1331) and a plurality of second heat exchange tubes (1333). One end of each of the plurality of second heat exchange tubes (1333) is connected to the outlet manifold (1331), and the other end of each of the plurality of second heat exchange tubes (1333) is connected to the other end of each of the plurality of first heat exchange tubes (1313) through a pipeline. The outlet manifold (1331) is used to connect to the other end of the indoor heat exchanger (12).

2. The duct auxiliary heating device according to claim 1, characterized in that, A first control valve (1312) is provided on the liquid inlet manifold (1311), and a second control valve (1332) is provided on the liquid outlet manifold (1331). Both the first control valve (1312) and the second control valve (1332) are used to be electrically connected to the controller (11) of the air conditioner so as to open or close under the control of the controller (11).

3. The duct auxiliary heating device according to claim 1 or 2, characterized in that, The duct auxiliary heating device (100) further includes a heat storage heat exchanger (150). The heat storage heat exchanger (150) is provided with a first pipe (153) and a second pipe (155). The first pipe (153) and the auxiliary heat exchanger (130) are connected in parallel to form a closed loop flow path. The second pipe (155) is used to connect with the outdoor heat storage module (13) of the air conditioner. The second pipe (155) is used to guide the phase change medium of the outdoor heat storage module (13) to exchange heat with the refrigerant in the first pipe (153).

4. The duct auxiliary heating device according to claim 3, characterized in that, A third control valve (1531) is provided at one end of the first pipeline (153), and a fourth control valve (1532) is provided at the other end of the first pipeline (153). Both the third control valve (1531) and the fourth control valve (1532) are used to be electrically connected to the controller (11) of the air conditioner so as to open or close under the control of the controller (11).

5. The duct auxiliary heating device according to claim 3, characterized in that, The heat storage heat exchanger (150) includes a heat transfer cylinder (151), a first pipe (153) is spirally wound around the outer wall of the heat transfer cylinder (151), and one end of the second pipe (155) passes through the heat transfer cylinder (151).

6. The duct auxiliary heating device according to claim 5, characterized in that, The second conduit (155) extends in a spiral shape inside the heat transfer cylinder (151).

7. An air conditioner, characterized in that, The system includes an air conditioning unit, a controller (11), an indoor heat exchanger (12), an outdoor heat storage module (13), and an auxiliary heating device (100) for the air duct. The auxiliary heating device (100) includes a heat storage heat exchanger (150) and interconnected electric auxiliary heating elements (110) and auxiliary heat exchangers (130). Both the auxiliary heat exchanger (130) and the electric auxiliary heating elements (110) are located within the air duct of the air conditioning unit. The auxiliary heat exchanger (130) includes a heat exchange tube layer and a fin layer. The heat exchange tube layer is connected to the electric auxiliary heating elements (110) through the fin layer. The two ends of the heat exchange tube layer are respectively connected by a first control valve (1312) and a second control valve (1312). 1332) is connected in parallel with the indoor heat exchanger (12). The heat storage heat exchanger (150) includes a first pipeline (153) and a second pipeline (155). The first pipeline (153) is provided with a third control valve (1531) and a fourth control valve (1532) at both ends. The first pipeline (153) is connected in parallel with the auxiliary heat exchanger (130) through the third control valve (1531) and the fourth control valve (1532). The second pipeline (155) is connected to the outdoor heat storage module (13) and is used to guide the phase change medium of the outdoor heat storage module (13) to exchange heat with the refrigerant in the first pipeline (153). The controller (11) is electrically connected to the first control valve (1312), the second control valve (1332), the third control valve (1531) and the fourth control valve (1532) respectively, and the controller (11) is electrically connected to the electric auxiliary heating element (110) for controlling the start-up or shutdown of the electric auxiliary heating element (110).

8. A temperature compensation control method, applied to the air conditioner (10) as described in claim 7, characterized in that, The temperature compensation control method includes: In heating mode, the first control valve (1312) and the second control valve (1332) are opened, and the third control valve (1531) and the fourth control valve (1532) are closed. In cooling mode, the first control valve (1312), the second control valve (1332), the third control valve (1531) and the fourth control valve (1532) are opened or closed according to the indoor air humidity, indoor air temperature, fin layer temperature, fin layer condensation, and indoor air dew point temperature, respectively. In dehumidification mode, the first control valve (1312), the second control valve (1332), the third control valve (1531) and the fourth control valve (1532) are controlled to open or close according to the indoor air temperature, the fin layer temperature, the condensation amount of the fin layer and the indoor air dew point temperature, respectively. If the air conditioner is turned off in cooling mode or dehumidification mode, the first control valve (1312) and the second control valve (1332) are closed, and the third control valve (1531) and the fourth control valve (1532) are opened. The third control valve (1531) and the fourth control valve (1532) are selectively closed according to the fin layer temperature, the fin layer condensation amount and the indoor air dew point temperature.

9. The temperature compensation control method according to claim 8, characterized in that, The step of controlling the first control valve (1312), the second control valve (1332), the third control valve (1531), and the fourth control valve (1532) to open or close respectively in cooling mode based on indoor air humidity, indoor air temperature, fin layer temperature, fin layer condensation, and indoor air dew point temperature includes: In cooling mode, if the indoor air humidity is less than or equal to 75%, and the fin layer temperature is less than or equal to the sum of the indoor air dew point temperature and the first preset value for a first preset duration, or the indoor air temperature is less than or equal to the sum of the target temperature and the second preset value for a second preset duration, then the first control valve (1312) and the second control valve (1332) are closed, and the third control valve (1531) and the fourth control valve (1532) are opened. In cooling mode, if the indoor air humidity is less than or equal to 75%, and if the condensation amount of the fin layer is less than or equal to the third preset value for a third preset duration, and if the condensation amount of the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the fourth preset value for a fourth preset duration, then the first control valve (1312) and the second control valve (1332) are controlled to open, and the third control valve (1531) and the fourth control valve (1532) are controlled to close.

10. The temperature compensation control method according to claim 8, characterized in that, The step of controlling the first control valve (1312), the second control valve (1332), the third control valve (1531), and the fourth control valve (1532) to open or close according to indoor air humidity, indoor air temperature, fin layer temperature, fin layer condensation, and indoor air dew point temperature in cooling mode further includes: In cooling mode, if the indoor air humidity is greater than 75%, and the fin layer temperature is less than or equal to the sum of the indoor air dew point temperature and the fifth preset value for a continuous fifth preset duration, or the indoor air temperature is less than or equal to the sum of the target temperature and the sixth preset value for a continuous sixth preset duration, then the first control valve (1312) and the second control valve (1332) are closed, and the third control valve (1531) and the fourth control valve (1532) are opened. In cooling mode, if the indoor air humidity is greater than 75%, and the condensation on the fin layer is less than or equal to the seventh preset value for a continuous seventh preset duration, and the temperature of the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the eighth preset value for a continuous eighth preset duration, then the first control valve (1312) and the second control valve (1332) are controlled to open, and the third control valve (1531) and the fourth control valve (1532) are controlled to close.

11. The temperature compensation control method according to claim 8, characterized in that, The step of controlling the first control valve (1312), the second control valve (1332), the third control valve (1531), and the fourth control valve (1532) to open or close according to the indoor air temperature, the fin layer temperature, the condensation amount of the fin layer, and the indoor air dew point temperature in dehumidification mode includes: In dehumidification mode, if the temperature of the fin layer is less than or equal to the sum of the indoor air dew point temperature and the ninth preset value for a continuous ninth preset duration, or if the temperature of the indoor air is less than or equal to the sum of the target temperature and the tenth preset value for a continuous tenth preset duration, then the first control valve (1312) and the second control valve (1332) are controlled to close, and the third control valve (1531) and the fourth control valve (1532) are controlled to open. In dehumidification mode, if the condensation amount of the fin layer is less than or equal to the eleventh preset value for an eleventh preset duration, and the temperature of the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the twelfth preset value for a twelfth preset duration, then the first control valve (1312) and the second control valve (1332) are controlled to open, and the third control valve (1531) and the fourth control valve (1532) are controlled to close.

12. The temperature compensation control method according to claim 8, characterized in that, The step of selectively controlling the closure of the third control valve (1531) and the fourth control valve (1532) based on the fin layer temperature, the condensation amount of the fin layer, and the indoor air dew point temperature includes: If the condensation amount of the fin layer is less than or equal to the thirteenth preset value for a continuous thirteenth preset duration, and the temperature of the fin layer is greater than or equal to the sum of the indoor air dew point temperature and the fourteenth preset value for a continuous fourteenth preset duration, then the third control valve (1531) and the fourth control valve (1532) are controlled to close.

Images