Evaporator, air conditioning system and dehumidification control method of air conditioning system

Abstract

The application relates to the air conditioning technical field, and particularly provides an evaporator, an air conditioning system and a dehumidification control method of the air conditioning system, and aims to solve the problem that the indoor temperature is reduced due to the dehumidification of the existing air conditioner, thereby affecting the user experience. For the purpose, the evaporator comprises: a first heat exchange pipe section connected with a first inflow pipe, the first inflow pipe being used for feeding a first refrigerant source; a second heat exchange pipe section connected with a second inflow pipe, the second inflow pipe being used for feeding a second refrigerant source, and the second inflow pipe being connected with the first inflow pipe through a control valve; and a controller in communication connection with the control valve, the controller controlling the working state of the control valve, so that the first refrigerant source enters the second heat exchange pipe section through the control valve, or the second refrigerant source enters the second heat exchange pipe section through the control valve. The application can maintain a relatively constant air outlet temperature during the dehumidification process of the air conditioner, thereby improving the user experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and specifically provides an evaporator, an air conditioning system, and a dehumidification control method of the air conditioning system. BACKGROUND

[0002] With the continuous progress of air conditioning technology and the increasing demand for the quality of life, the functions of air conditioners are becoming more and more diversified. For example, in the case of high indoor humidity, the air conditioner can dehumidify while operating in a cooling state.

[0003] The principle of air conditioner dehumidification is that when operating in a cooling mode, the evaporator surface is lowered to the dew point temperature to condense water, thereby reducing the water vapor content in the indoor environment. Based on the above principle, if you want to dehumidify the indoor, you must increase the operating frequency of the compressor to lower the temperature of the evaporator surface, which will cause the indoor temperature to drop, reduce the comfort, and affect the user experience.

[0004] Correspondingly, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0005] The present application aims to solve the above technical problems, i.e., to solve the problem of reducing indoor temperature caused by dehumidification of the existing air conditioner, thereby affecting the user experience.

[0006] In a first aspect, the present application provides an evaporator, comprising:

[0007] A first heat exchange pipe section is connected with a first flow inlet pipe, and the first flow inlet pipe is used to introduce a first refrigerant source;

[0008] A second heat exchange pipe section is connected with a second flow inlet pipe, and the second flow inlet pipe is used to introduce a second refrigerant source, and a control valve is connected between the second flow inlet pipe and the first flow inlet pipe;

[0009] A controller is in communication with the control valve, and the controller controls the working state of the control valve to enable the first refrigerant source to enter the second heat exchange pipe section through the control valve or the second refrigerant source to enter the second heat exchange pipe section through the control valve.

[0010] In one technical solution of the above evaporator, the second flow inlet pipe is further connected with a flow regulating valve, and the controller is further in communication with the flow regulating valve to regulate the flow of the second refrigerant source entering the second heat exchange pipe section.

[0011] In one technical solution of the above evaporator, a plurality of first heat exchange pipe sections are provided, and the plurality of first heat exchange pipe sections are connected in parallel with each other.

[0012] In one of the above-mentioned technical solutions of the evaporator, the control valve is an electromagnetic valve.

[0013] In a second aspect, the application provides an air conditioning system, comprising a compressor, a throttling device, the evaporator of any one of the first aspect, and a condenser, the first inflow pipe being connected to the throttling device, and the second inflow pipe being connected to the condenser.

[0014] In a third aspect, the application provides a dehumidification control method of an air conditioning system, wherein the air conditioning system comprises a compressor, a throttling device, an evaporator, and a condenser, the evaporator comprising:

[0015] a first heat exchange pipe section connected to a first inflow pipe, the first inflow pipe being connected to the throttling device;

[0016] a second heat exchange pipe section connected to a second inflow pipe, the second inflow pipe being connected to the condenser, and the second inflow pipe being connected to the first inflow pipe through a control valve;

[0017] The control method comprises:

[0018] adjusting the working state of the control valve to make the refrigerant flowing through the throttling device enter the first heat exchange pipe section and the second heat exchange pipe section respectively when the air conditioning system operates in a cooling mode;

[0019] obtaining the ambient temperature and the ambient humidity of the indoor environment;

[0020] adjusting the working state of the control valve to make part of the refrigerant of the condenser enter the second heat exchange pipe section through the second inflow pipe when the difference between the ambient temperature and a preset temperature is less than a first temperature value and the ambient humidity is greater than a first humidity value.

[0021] In one of the above-mentioned technical solutions of the control method, the control method further comprises:

[0022] increasing the operating frequency of the compressor when the difference between the ambient temperature and a preset temperature is greater than a first temperature value.

[0023] In one of the above-mentioned technical solutions of the control method, the second inflow pipe is further connected to a flow regulating valve, and adjusting the working state of the control valve to make part of the refrigerant of the condenser enter the second heat exchange pipe section through the second inflow pipe further comprises:

[0024] adjusting the opening degree of the flow regulating valve according to the ambient humidity.

[0025] In one of the above-mentioned technical solutions of the control method, adjusting the opening degree of the flow regulating valve according to the ambient humidity comprises:

[0026] The opening degree of the flow regulating valve is gradually increased as the ambient humidity gradually decreases.

[0027] In one of the technical solutions of the control method, the control method further comprises:

[0028] When the ambient humidity is lower than the second humidity value, the working state of the control valve is adjusted to make the refrigerant flowing through the throttling device enter the first heat exchange pipe section and the second heat exchange pipe section, respectively; and / or

[0029] When the ambient temperature is lower than the second preset temperature value, the operating frequency of the compressor is reduced.

[0030] The present application divides the evaporator into a first heat exchange pipe section and a second heat exchange pipe section, and connects a control valve between the first inlet pipe and the second inlet pipe. When the air conditioning system is started in the cooling mode, the working state of the control valve is set to make the low-temperature and low-pressure refrigerant passing through the throttling device enter the first heat exchange pipe section and the second heat exchange pipe section, respectively. When dehumidification is needed, the controller adjusts the working state of the control valve to make the low-temperature and low-pressure refrigerant passing through the throttling device enter only the first heat exchange pipe section, and the medium-temperature and medium-pressure refrigerant from the condenser enters the second heat exchange pipe section. In this case, the surface temperature of the first heat exchange pipe section is reduced to below the dew point temperature, and the water vapor in the indoor air condenses into liquid on the surface of the first heat exchange pipe and is discharged outdoors, achieving the purpose of dehumidification. At the same time, the second heat exchange pipe section has a higher surface temperature because the higher-temperature refrigerant from the condenser is introduced into the second heat exchange pipe section. The mixing of the two parts of air around the first heat exchange pipe section and the second heat exchange pipe section keeps the outlet air temperature of the indoor unit within a certain range.

[0031] As described above, by changing the source of the refrigerant in the second heat exchange pipe section through the control valve, the higher air temperature around the second heat exchange pipe section can be mixed with the lower air temperature around the first heat exchange pipe section when the air conditioner is operated in the dehumidification mode, so as to keep the outlet air temperature of the air conditioner within a relatively constant temperature range, preventing the indoor temperature from being too low due to dehumidification, and thus improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0032] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0033] Figure 1 is a structural schematic diagram of an evaporator according to an embodiment of the present application;

[0034] Figure 2 is a main step flowchart of a dehumidification control method of an air conditioning system according to an embodiment of the present application

[0035] Figure 3 is a detailed step flow chart of a dehumidification control method of an air conditioning system according to an embodiment of the present application.

[0036] In the drawings, reference numerals refer to the following:

[0037] 1, first heat exchange pipe section; 11, first flow inlet pipe; 111, first branch; 112, second branch; 113, third branch; 2, second heat exchange pipe section; 21, second flow inlet pipe; 3, control valve; 4, flow regulating valve. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the embodiments are only used to explain the technical principles of the present application, and are not used to limit the protection scope of the present application. Those skilled in the art can make adjustments according to the needs in order to adapt to specific application occasions.

[0039] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the related devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the ordinal numbers "first", "second" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0040] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] Referring to Figure 1 is a structural schematic diagram of an evaporator according to an embodiment of the present application, which includes a first heat exchange pipe section 1 and a second heat exchange pipe section 2, the first heat exchange pipe section 1 is connected with a first flow inlet pipe 11, and the second heat exchange pipe section 2 is connected with a second flow inlet pipe 21.

[0042] The first inflow pipe 11 is used for connecting to a first refrigerant source, and the second inflow pipe 21 is used for connecting to a second refrigerant source. Specifically, when the evaporator is connected to an air conditioning system, the first inflow pipe 11 is connected to a throttling device of the air conditioning system, and the second inflow pipe 21 is connected to a condenser of the air conditioning system. It should be noted that, since the present application is directed to the dehumidification process of the air conditioner, and the dehumidification process of the air conditioner is based on the refrigeration operation mode of the air conditioner, the evaporator in the present application is the indoor heat exchanger, and the condenser is the outdoor heat exchanger. When the air conditioner operates in the refrigeration mode, the high-temperature and high-pressure refrigerant discharged from the compressor passes through the condenser and the throttling device in turn. The low-temperature and low-pressure refrigerant after the throttling device enters the first heat exchange pipe section 1 through the first inflow pipe 11, and part of the refrigerant branched at the end of the condenser does not pass through the throttling device, but enters the second heat exchange pipe section 2 through the second inflow pipe 21. Therefore, the first refrigerant source in the above is the low-temperature and low-pressure refrigerant after the throttling device, and the second refrigerant source is the medium-temperature and medium-pressure refrigerant directly discharged from the condenser without passing through the throttling device.

[0043] Based on the internal space structure of the air conditioner indoor unit, in some embodiments of the present application, the first heat exchange pipe section 1 is provided with two. The two first heat exchange pipe sections 1 are arranged in parallel, that is, the first inflow pipe 11 is divided into a first branch 111 and a second branch 112, and the refrigerant in the first inflow pipe 11 enters the two first heat exchange pipe sections 1 through the first branch 111 and the second branch 112 respectively.

[0044] The end of the first inflow pipe 11 also has a third branch 113, the third branch 113 is connected with the second inflow pipe 21, and a control valve 3 is arranged at the connection between the third branch 113 and the second inflow pipe 21. Optionally, the control valve 3 is a three-way valve, as shown in Figure 1 The control valve 3 has three ports D, E and F. In an embodiment of the present application, the evaporator further includes a controller (not shown in the figure) in communication connection with the control valve 3. The control valve 3 can be a solenoid valve, so that the controller can adjust the working state of the control valve 3, so that when only the EF port is turned on, the first refrigerant source in the first inflow pipe 11 enters the second heat exchange pipe section 2 through the control valve 3, at this time, the second refrigerant source of the second inflow pipe 21 cannot enter the second heat exchange pipe section 2; when only the DF port is turned on, the second refrigerant source in the second inflow pipe 21 enters the second heat exchange pipe section 2 through the control valve 3, at this time, the first refrigerant source in the first inflow pipe 11 cannot enter the second heat exchange pipe section 2, so that the surface temperature of the second heat exchange pipe section 2 can be adjusted. The refrigerant passing through the first heat exchange pipe section 1 and the second heat exchange pipe section 2 finally flows together and flows downward.

[0045] As described above, the application divides the evaporator into the first heat exchange pipe section 1 and the second heat exchange pipe section 2, and connects the control valve 3 between the first flow inlet pipe 11 and the second flow inlet pipe 21. When the air conditioning system operates in the normal cooling mode or heating mode, the control valve 3 is only connected through the EF port, and the air conditioning system operates normally. When the air conditioning system operates in the cooling mode, the low-temperature and low-pressure refrigerant passing through the throttling device enters the first heat exchange pipe section 1 and the second heat exchange pipe section 2. When dehumidification is needed, the controller adjusts the working state of the control valve 3 to make the control valve 3 only connected through the DF port. At this time, the low-temperature and low-pressure refrigerant passing through the throttling device only enters the first heat exchange pipe section 1, and the medium-temperature and medium-pressure refrigerant from the condenser enters the second heat exchange pipe section 2. In this case, the surface temperature of the first heat exchange pipe section 1 is reduced to below the dew point temperature, and the water vapor in the indoor air is condensed into liquid on the surface of the first heat exchange pipe section 1 and discharged to the outdoor, achieving the purpose of dehumidification. At the same time, the second heat exchange pipe section 2 is supplied with the refrigerant from the condenser, which has a higher temperature, so the surface temperature of the second heat exchange pipe section 2 is higher. The mixing of the air around the first heat exchange pipe section 1 and the air around the second heat exchange pipe section 2 keeps the outlet air temperature of the indoor unit within a certain range.

[0046] Therefore, by changing the source of the refrigerant in the second heat exchange pipe section 2 through the control valve 3, the higher air temperature around the second heat exchange pipe section 2 can be mixed with the lower air temperature around the first heat exchange pipe section 1 when the air conditioner operates in the dehumidification mode, so as to keep the outlet air temperature of the air conditioner within a relatively constant temperature range, preventing the indoor temperature from being too low due to dehumidification, and thus improving the user experience.

[0047] Reference Figure 1 In an implementation manner of the application, the second flow inlet pipe 21 is further connected with the flow regulating valve 4. Optionally, the flow regulating valve 4 is arranged on the side of the control valve 3 away from the second heat exchange pipe section 2, and the controller is further connected with the flow regulating valve 4 in communication, so as to adjust the flow of the second refrigerant source entering the second heat exchange pipe section 2.

[0048] It should be noted that the indoor unit of the air conditioner is further provided with a humidity sensor for detecting the indoor environmental humidity, and the controller controls the opening degree of the flow regulating valve 4 according to the detection signal of the humidity sensor. Specifically, when the indoor environmental humidity is relatively large and the air conditioner is in the dehumidification state, the controller controls the opening degree of the flow regulating valve 4 to be in a relatively small range, at this time, the amount of refrigerant entering the second heat exchange pipe section 2 is small, and the air temperature around the second heat exchange pipe section 2 is controlled to be in a relatively low range, so that the surface temperature of the first heat exchange pipe section 1 is rapidly lowered, thereby improving the dehumidification efficiency. As the environmental humidity gradually decreases, in order to avoid continuous decrease of the indoor temperature, the controller gradually increases the opening degree of the flow regulating valve 4, thereby increasing the air temperature around the second heat exchange pipe section 2, and maintaining the indoor temperature within a certain range.

[0049] Therefore, by setting the flow regulating valve 4 and adjusting the opening degree of the flow regulating valve 4 according to the ambient humidity, the indoor temperature can be adjusted by increasing the opening degree of the flow regulating valve 4 when the humidity decreases to a lower range, thereby preventing the indoor temperature from continuously decreasing.

[0050] The application also discloses an air conditioning system, which comprises a compressor, a throttling device, a condenser and the evaporator in any of the above embodiments, wherein the first inflow pipe 11 of the evaporator is connected to the throttling device, and the second inflow pipe 21 is connected to the condenser. The structural features of the above components and the connection relationship therebetween are known in the art, and thus will not be described in detail herein.

[0051] The application also discloses a dehumidification control method of an air conditioning system. Figure 2 The main step flowchart of the dehumidification control method of the air conditioning system according to an embodiment of the application comprises the following steps.

[0052] S101: When the air conditioning system is operated in a refrigeration mode, the working state of the control valve is adjusted, so that the refrigerant flowing through the throttling device enters the first heat exchange pipe section and the second heat exchange pipe section respectively.

[0053] It should be noted that the dehumidification of the air conditioner is performed in the refrigeration mode, and thus the above dehumidification control method of the application defaults that the air conditioning system is operated in the refrigeration mode.

[0054] It should also be noted that Figure 1 , in the standby state of the air conditioner, the default state of the control valve 3 is that the EF port is connected and the D port is closed, and thus the above state is the normal state of the control valve 3. Therefore, in some embodiments of the application, in step S101, "adjusting the working state of the control valve so that the refrigerant flowing through the throttling device enters the first heat exchange pipe section and the second heat exchange pipe section respectively" can be "maintaining the normal state of the control valve so that the refrigerant flowing through the throttling device enters the first heat exchange pipe section and the second heat exchange pipe section respectively", that is, in step S101, after the air conditioning system is started in the refrigeration mode, the working state of the control valve does not need to be adjusted.

[0055] S102: Obtain the ambient temperature and the ambient humidity in the room.

[0056] The temperature sensor and the humidity sensor are installed in the indoor unit of the air conditioner, and the ambient temperature and the ambient humidity are obtained by the temperature sensor and the humidity sensor in step S102. It should be noted that step S102 and step S101 do not have a sequence, and step S102 and step S101 can be performed simultaneously.

[0057] S103: judging whether the difference between the ambient temperature and the preset temperature is less than a first temperature value and whether the ambient humidity is greater than a first humidity value. When the difference between the ambient temperature and the preset temperature is less than the first temperature value and the ambient humidity is greater than the first humidity value, the working state of the control valve is adjusted so that part of the refrigerant of the condenser enters the second heat exchange pipe section through the second inflow pipe.

[0058] It should be noted that the preset temperature is a temperature value set by a user when the air conditioner is running, and the first temperature value and the first humidity value can be set according to actual needs. For example, in some implementations, the first temperature value is 8℃ and the first humidity value is 70%. At this time, step S103 can be: when the ambient temperature - the preset temperature < 8℃ and the ambient humidity > 70%, the working state of the control valve is adjusted so that part of the refrigerant of the condenser enters the second heat exchange pipe section through the second inflow pipe.

[0059] As described above, the above-mentioned method can realize the constant temperature dehumidification of the air conditioner, reduce the discomfort caused to the user due to the decrease of the indoor temperature during the dehumidification process, and automatically control the dehumidification according to the actual detection values of the ambient temperature and the ambient humidity, thereby improving the intelligent degree of the air conditioning system.

[0060] Reference Figure 3 For a detailed step flow chart of the dehumidification control method of the air conditioning system according to an embodiment of the present application, the specific steps are as follows:

[0061] In step S103, when it is detected that the difference between the ambient temperature and the preset temperature is greater than the first temperature value, step S1031 is performed: the operating frequency of the compressor is increased.

[0062] Step S103 indicates that during the initial running stage of the air conditioner, the ambient temperature is too high, and at this time, the operating frequency of the compressor should be increased to rapidly cool the indoor environment.

[0063] In an embodiment of the present application, in step S103, "adjusting the working state of the control valve so that part of the refrigerant of the condenser enters the second heat exchange pipe section through the second inflow pipe" further includes:

[0064] S1032: adjusting the opening degree of the flow regulating valve according to the ambient humidity. Specifically, as described in the above embodiment, when the ambient humidity is high, the opening degree of the flow regulating valve should be controlled to be small to rapidly reduce the humidity; and when the ambient humidity decreases, the opening degree of the flow regulating valve should be controlled to be large to maintain the ambient temperature within a certain range and prevent the ambient temperature from continuously decreasing.

[0065] Therefore, step 1032 can be: in the case that the ambient humidity gradually decreases, the opening degree of the flow regulating valve is gradually increased.

[0066] Further, after step S1032, the dehumidification control method further comprises the following steps:

[0067] S1041: judging whether the ambient humidity is lower than a second humidity value, and adjusting the working state of the control valve so that the refrigerant flowing through the throttling device enters the first heat exchange pipe section and the second heat exchange pipe section respectively when the ambient humidity is lower than the second humidity value.

[0068] That is, step S104 represents that when the ambient humidity is lower than the second humidity value, the dehumidification process should be stopped, at this time, the air conditioner is controlled to operate in the normal cooling mode, and then the working state of the control valve should be controlled so that the air conditioning system returns to the normal state in step 101.

[0069] The second humidity value can be set according to actual needs. For example, it is generally considered that the humidity value of about 45% is a comfortable humidity value perceived by the human body, and therefore the second humidity value can be set to 40% or 35% or other values, indicating that the dehumidification requirement has been met when the ambient humidity is lower than the above value, and dehumidification is not needed at this time, and the operating power of the compressor is reduced and the evaporator is controlled to operate in the normal state.

[0070] S1042: judging whether the ambient temperature is lower than a preset second temperature value, and reducing the operating frequency of the compressor when it is confirmed that the ambient temperature is lower than the preset second temperature value.

[0071] Step S1042 represents that when the ambient temperature is lower than the preset second temperature value, it is indicated that the indoor temperature has been lowered to a lower value at this time, and in order to prevent the temperature from continuously decreasing during the dehumidification process and bring discomfort to the user, the operating frequency of the compressor can be reduced to prevent the temperature from continuously decreasing. The specific value of the second temperature value can be determined according to actual needs, for example, when the ambient temperature is lower than the preset temperature by 2°C or 3°C, the operating frequency of the compressor is reduced.

[0072] It should be noted that the above steps S1041 and S1042 are not limited to the above order, and do not constitute a limitation on the order of the steps. In an embodiment of the present application, steps S1041 and S1042 can be steps performed simultaneously, that is, the monitoring of the ambient humidity and the ambient temperature is performed synchronously, and when any parameter of the ambient humidity and the ambient temperature meets the above condition, step S1041 or step S1042 can be executed.

[0073] In an embodiment of the present application, after step S103, the dehumidification control method further comprises:

[0074] When the difference between the ambient temperature and the preset temperature is less than or equal to the first temperature value but greater than or equal to a third temperature value, the operating frequency of the compressor is increased.

[0075] Optionally, in the above case, the value of the compressor operating frequency increase is less than the value of the compressor operating frequency increase in step S1031.

[0076] For example, in an implementation, the first temperature value is 8℃ and the third temperature value is 5℃, then based on the above embodiment, optionally, when the ambient temperature - preset temperature > 8℃, the compressor is controlled to operate at the set frequency + 5HZ, when 5℃ ≤ ambient temperature - preset temperature ≤ 8℃, the compressor is controlled to operate at the set frequency + 3HZ, and when the ambient temperature - preset temperature < 5℃, the compressor is controlled to operate at the set frequency. Through the above method, the indoor can be quickly cooled, and the refrigeration efficiency is improved.

[0077] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

Claims

1. An evaporator, characterized by The application relates to an air conditioning system, which comprises: a first heat exchange pipe section connected with a first inflow pipe for connecting a first refrigerant source; a second heat exchange pipe section connected with a second inflow pipe for connecting a second refrigerant source, and a control valve connected between the first inflow pipe and the second inflow pipe; a controller in communication connection with the control valve, which controls the working state of the control valve to make the first refrigerant source enter the second heat exchange pipe section through the control valve or the second refrigerant source enter the second heat exchange pipe section through the control valve; wherein the first refrigerant source is low-temperature and low-pressure refrigerant passing through a throttling device, and the second refrigerant source is medium-temperature and medium-pressure refrigerant directly discharged from a condenser without passing through the throttling device.

2. The evaporator of claim 1, wherein, The second inflow pipe is further provided with a flow regulating valve in communication connection, and the controller is further in communication connection with the flow regulating valve to regulate the flow of the second refrigerant source entering the second heat exchange pipe section.

3. The evaporator of claim 1, wherein, The first heat exchange pipe section is provided in plurality, and the plurality of first heat exchange pipe sections are connected in parallel with each other.

4. The evaporator of claim 1, wherein, The control valve is an electromagnetic valve.

5. An air conditioning system characterized by comprising: The air conditioning system comprises a compressor, a throttling device, the evaporator of any one of claims 1 to 4, and a condenser, the first inflow pipe is connected with the throttling device, and the second inflow pipe is connected with the condenser.

6. A dehumidification control method of an air conditioning system, characterized by, The air conditioning system comprises a compressor, a throttling device, the evaporator of any one of claims 1 to 4, and a condenser, the first inflow pipe is connected with the throttling device, and the second inflow pipe is connected with the condenser. The control method comprises: when the air conditioning system operates in a refrigeration mode, adjusting the working state of the control valve to make the refrigerant flowing through the throttling device enter the first heat exchange pipe section and the second heat exchange pipe section respectively; obtaining the ambient temperature and the ambient humidity of a room; when the difference between the ambient temperature and a preset temperature is less than a first temperature value and the ambient humidity is greater than a first humidity value, adjusting the working state of the control valve to make part of the refrigerant of the condenser enter the second heat exchange pipe section through the second inflow pipe. The control method further comprises: when the difference between the ambient temperature and the preset temperature is greater than the first temperature value, increasing the operating frequency of the compressor.

7. The control method according to claim 6, characterized by The second inflow pipe is further provided with a flow regulating valve in communication connection, and the controller is further in communication connection with the flow regulating valve to regulate the flow of the second refrigerant source entering the second heat exchange pipe section. The control method further comprises:

8. The control method according to claim 6, characterized by, when the ambient humidity is lower than a second humidity value, adjusting the working state of the control valve to make the refrigerant flowing through the throttling device enter the first heat exchange pipe section and the second heat exchange pipe section respectively; and / or ​ 9. The control method according to claim 8, characterized by, ​ ​ 10. The control method according to any one of claims 6 to 9, characterized by, ​ ​ decrease the operating frequency of the compressor when the ambient temperature is lower than a preset temperature second temperature value.

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