Control method of air conditioner and air conditioner

Abstract

This invention relates to the field of smart home appliance technology, specifically providing a control method and air conditioner for an air conditioner, aiming to solve the problem of condensation caused by the ground temperature dropping below the dew point during refrigerant cooling. To this end, the air conditioner of this invention includes a compressor, an outdoor heat exchanger, a throttling valve, and an indoor heat exchange pipe connected to form a refrigerant circulation loop. The indoor heat exchange pipe is laid in the indoor floor. During air conditioner cooling operation, the control method includes: S100: obtaining the dew point temperature T1 of the indoor environment; S200: obtaining the lowest temperature T2 of the indoor heat exchange pipe; S300: selectively adjusting the compressor frequency and / or adjusting the opening of the throttling valve according to T1 and T2 to avoid condensation on the indoor floor. This invention, during air conditioner cooling operation, effectively avoids condensation caused by excessively low ground temperatures by dynamically adjusting the compressor frequency and the throttling valve opening, thereby improving the comfort and safety of the indoor environment.

Description

Technical Field

[0001] This invention relates to the field of smart home appliance technology, specifically providing a control method for an air conditioner and an air conditioner. Background Technology

[0002] In modern building air conditioning systems, geothermal refrigerant technology is widely used due to its high efficiency and energy saving. This technology transfers heat from inside the building to the ground through refrigerant circulation in buried pipes, thereby reducing the indoor temperature.

[0003] After a local fluorinated system has been running for a period of time, the ground temperature will gradually decrease. While this process effectively reduces indoor temperature, condensation can easily form on the surface when the ground temperature drops below the dew point. Condensation not only makes the ground slippery, increasing safety hazards when walking, but it can also damage indoor decorative materials and furniture, seriously affecting user experience and the long-term lifespan of the building.

[0004] To overcome this technical challenge, the industry has been seeking effective solutions. Some traditional anti-condensation methods, such as adding floor insulation layers and adjusting refrigerant circulation, can alleviate the condensation problem to some extent, but their effectiveness is limited.

[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem of condensation caused by the ground temperature dropping below the dew point during the process of ground fluorine refrigeration.

[0007] In a first aspect, the present invention provides a control method for an air conditioner, the air conditioner comprising a compressor, an outdoor heat exchanger, a throttling valve, and an indoor heat exchange pipe connected to form a refrigerant circulation loop, the indoor heat exchange pipe being laid in the indoor floor, and the control method comprising, when the air conditioner is in cooling operation:

[0008] S100: Obtain the dew point temperature T1 of the indoor environment;

[0009] S200: Obtain the lowest temperature T2 of the indoor heat exchange tube;

[0010] S300: Based on T1 and T2, selectively adjust the frequency of the compressor and / or adjust the opening of the throttle valve to prevent condensation from occurring on the indoor floor.

[0011] In the preferred embodiment of the above control method, step S100 specifically includes:

[0012] S110: Obtain indoor temperature T3 and humidity R;

[0013] S120: Calculate the specific value of T1 based on T3 and R.

[0014] In the preferred embodiment of the above control method, the step of "calculating the specific value of T1 based on T3 and R" specifically includes:

[0015]

[0016] In the preferred embodiment of the above control method, a detection point is provided on the indoor heat exchange tube, the detection point is located at the liquid inlet of the indoor heat exchange tube, and step S200 specifically includes:

[0017] Obtain the temperature at the liquid inlet of the indoor heat exchange tube; or

[0018] The indoor heat exchange tube is equipped with multiple different detection points. Step S200 specifically includes:

[0019] The temperature of the indoor heat exchanger tube at each of the detection points is obtained;

[0020] The lowest temperature is determined by comparing the multiple temperatures obtained.

[0021] In the preferred embodiment of the above control method, step S300, "selectively adjusting the frequency of the compressor and / or adjusting the opening of the throttle valve according to T1 and T2," specifically includes:

[0022] The target temperature T5 of the indoor heat exchange tube is calculated based on the dew point temperature T1 and the preset ground cooling target superheat T4.

[0023] Compare T2 with T5;

[0024] If T2 < T5, then adjust the frequency of the compressor and / or adjust the opening of the throttle valve to reduce the flow rate of the refrigerant through the indoor heat exchange pipe, so that T2 ≥ T5.

[0025] In the preferred embodiment of the above control method, the step of "calculating the target temperature T5 of the indoor heat exchanger tube based on the dew point temperature T1 and the preset target superheat of the ground cooling system T4" specifically includes:

[0026] T5 = T1 - T4 + X;

[0027] Where X is a correction parameter and is a fixed value.

[0028] In the preferred technical solution of the above control method, the value of X is 1 to 2.

[0029] In the preferred embodiment of the above control method, the step of "adjusting the frequency of the compressor and / or adjusting the opening of the throttle valve to reduce the flow rate of the refrigerant through the indoor heat exchange pipe, so that T2≥T5" specifically includes:

[0030] First, reduce the frequency of the compressor by time t1, and then determine whether T2≥T5 is satisfied;

[0031] If it is determined that T2≥T5, then the throttle valve will no longer be adjusted;

[0032] If T2 < T5, then further reduce the opening of the throttle valve until T2 ≥ T5; or

[0033] The step of "adjusting the frequency of the compressor and / or adjusting the opening of the throttle valve to reduce the flow rate of the refrigerant through the indoor heat exchange pipe, so that T2 ≥ T5" specifically includes:

[0034] First, reduce the opening degree t2 of the throttle valve, and then determine whether T2≥T5 is satisfied;

[0035] If it is determined that T2≥T5, then the frequency of the compressor will no longer be adjusted;

[0036] If it is determined that T2 < T5, then the frequency of the compressor is further reduced until T2 ≥ T5.

[0037] In the preferred embodiment of the above control method, t1 takes the value of 5 min to 10 min, or

[0038] The value of t2 ranges from 5 min to 10 min.

[0039] In a second aspect, the present invention also provides an air conditioner, which includes a controller configured to perform the control method described above.

[0040] Those skilled in the art will understand that the technical solution of the present invention provides a control method for an air conditioner. The air conditioner includes a compressor, an outdoor heat exchanger, a throttling valve, and an indoor heat exchange pipe connected to form a refrigerant circulation loop. The indoor heat exchange pipe is laid in the indoor floor. During air conditioning cooling operation, the control method includes: S100: obtaining the dew point temperature T1 of the indoor environment; S200: obtaining the lowest temperature T2 of the indoor heat exchange pipe; S300: selectively adjusting the compressor frequency and / or adjusting the opening of the throttling valve according to T1 and T2 to avoid condensation on the indoor floor. By adopting the above technical solution, the present invention can prevent the floor temperature from dropping below the dew point during refrigerant cooling, thus preventing condensation. Specifically, when T2 is close to or lower than T1, the refrigerant circulation speed and pressure are changed by adjusting the compressor frequency, thereby adjusting the temperature of the refrigerant in the heat exchange pipe. In addition, the flow rate and pressure of the refrigerant can be changed by adjusting the opening of the throttle valve, which can further regulate the temperature of the heat exchange tubes, so that T2 is always kept above T1, effectively avoiding condensation caused by low ground temperature, thereby improving the comfort and safety of the indoor environment.

[0041] Furthermore, step S100 of the present invention specifically includes: S110: obtaining the indoor temperature T3 and humidity R; S120: calculating the specific value of T1 based on T3 and R. By setting this method, a very accurate dew point temperature value can be obtained. This precise dew point temperature information allows the air conditioning control system to more finely adjust the cooling capacity, avoiding condensation on the floor caused by excessive cooling, while ensuring the comfort of the indoor environment.

[0042] Furthermore, the indoor heat exchange tube of the present invention is provided with a detection point located at the liquid inlet of the indoor heat exchange tube. Step S200 specifically includes: acquiring the temperature at the liquid inlet of the indoor heat exchange tube; or, multiple different detection points are provided on the indoor heat exchange tube, and step S200 specifically includes: acquiring the temperature of the indoor heat exchange tube at each detection point; comparing the acquired multiple temperatures to determine the lowest temperature. This method improves the control accuracy and response speed of the air conditioning system. Attached Figure Description

[0043] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0044] Figure 1 This is a flowchart illustrating the control method of the present invention;

[0045] Figure 2 Flowchart of an embodiment of the control method of the present invention Figure 1 ;

[0046] Figure 3 Flowchart of an embodiment of the control method of the present invention Figure 2 . Detailed Implementation

[0047] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. For example, although the following embodiments are described in conjunction with air conditioning, the air conditioning control method provided by the present invention is equally applicable to other products that need to solve the problem of condensation caused by the ground temperature dropping below the dew point during the cooling process.

[0048] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Based on the background art, this invention addresses the problem of condensation caused by the ground temperature dropping below the dew point during ground-based refrigerant cooling. It provides an air conditioning control method designed to effectively solve this problem by balancing the temperature of the indoor heat exchange tubes and the indoor floor temperature.

[0050] The present invention provides an air conditioner, which includes a compressor, an outdoor heat exchanger, a throttling valve and an indoor heat exchange pipe connected to form a refrigerant circulation loop, the indoor heat exchange pipe being laid in the indoor floor.

[0051] The compressor is the "heart" of the air conditioner provided by this invention. It is responsible for compressing the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. During this process, the internal energy of the refrigerant increases, providing an energy basis for the subsequent condensation and heat release process.

[0052] The outdoor heat exchanger is located outdoors, and its main function is to condense the high-temperature and high-pressure gaseous refrigerant into a liquid state here. During the condensation process, the refrigerant releases a large amount of heat into the outdoor environment, thus achieving heat transfer.

[0053] The throttling valve is a key control element in the refrigerant circulation. It reduces the pressure and temperature of the liquid refrigerant through throttling. When the throttled refrigerant enters the indoor heat exchange tube, it is in a low-temperature, low-pressure liquid or gas-liquid mixture state, preparing it to absorb indoor heat.

[0054] The indoor heat exchange pipes are laid in the indoor floor, forming a large heat dissipation / absorption surface. In cooling mode, low-temperature, low-pressure refrigerant flows inside the pipes, absorbing heat from the floor and thus lowering the indoor temperature. In heating mode, the system can adjust the flow direction and state of the refrigerant to allow the indoor heat exchange pipes to release heat and heat the indoor environment.

[0055] The air conditioner of this invention significantly increases the heat exchange area with indoor air by laying indoor heat exchange pipes in the floor, reducing energy loss and improving heat exchange efficiency. The floor radiant heating / cooling method results in a more uniform indoor temperature distribution, reducing discomfort caused by temperature differences.

[0056] In addition, such as Figure 1 As shown, the present invention also provides a control method for an air conditioner. In the case of air conditioner cooling operation, the control method includes:

[0057] S100: Obtain the dew point temperature T1 of the indoor environment;

[0058] S200: Obtain the lowest temperature T2 of the indoor heat exchanger tube;

[0059] S300: Based on T1 and T2, selectively adjust the compressor frequency and / or adjust the opening of the throttle valve to avoid condensation on the indoor floor.

[0060] Dew point temperature is the temperature at which water vapor in the air reaches saturation. When the surface temperature of an object is lower than the dew point temperature, water vapor in the air will condense into water droplets on the surface of the object.

[0061] The lowest temperature of the indoor heat exchange pipes reflects the lowest temperature at which the refrigerant flows inside the pipes, which is a key factor in determining whether condensation will occur on the floor.

[0062] When T2 is close to or lower than T1, it indicates a risk of condensation on the indoor floor. At this point, the control system adjusts the compressor frequency to change the refrigerant circulation speed and pressure, thereby regulating the refrigerant temperature in the heat exchange tubes. Furthermore, the control system can also adjust the opening of the throttle valve to change the refrigerant flow rate and pressure, further regulating the heat exchange tube temperature to keep T2 consistently above T1, thus preventing condensation.

[0063] Therefore, this invention effectively avoids condensation caused by excessively low ground temperature by dynamically adjusting the compressor frequency and throttle valve opening during air conditioning cooling operation, thereby improving the comfort and safety of the indoor environment.

[0064] Preferably, such as Figure 2 and Figure 3 As shown, step S100 specifically includes:

[0065] S110: Obtain indoor temperature T3 and humidity R;

[0066] S120: Calculate the specific value of T1 based on T3 and R.

[0067] Indoor temperature is one of the important factors affecting dew point temperature. This invention includes a temperature sensor installed indoors, which can monitor and obtain the indoor temperature T3 value in real time. Indoor humidity also has a direct impact on dew point temperature. This invention also includes a humidity sensor installed indoors, which can monitor and obtain the indoor humidity R value in real time.

[0068] After obtaining the specific values ​​of temperature T3 and humidity R, the dew point temperature T1 can be calculated using a specific algorithm or formula.

[0069] Preferably, the step of "calculating the specific value of T1 based on T3 and R" specifically includes:

[0070]

[0071] Of course, in other embodiments, after obtaining the specific values ​​of temperature T3 and humidity R, the dew point temperature T1 can be calculated using other algorithms or formulas, such as the Magnus empirical formula, the Arden-Buckle equation, or other empirical formulas.

[0072] It should be noted that each formula has its applicable scenarios and limitations. When choosing a formula, a trade-off should be made based on specific needs and data availability. This invention does not impose specific limitations on the formula for calculating the specific value of T1 using T3 and R.

[0073] Preferably, in order to obtain the lowest temperature T2 of the indoor heat exchange tube more accurately, the present invention provides the following two detection methods:

[0074] Option 1 involves a single detection point. This is achieved by installing a single detection point on the indoor heat exchange tube, located at the liquid inlet of the tube. Figure 2 As shown, step S200 specifically includes:

[0075] Obtain the temperature at the liquid inlet of the indoor heat exchange tube.

[0076] As the refrigerant flows through the indoor heat exchange tubes, it continuously absorbs heat from the room, causing its temperature to rise. Therefore, the temperature at the inlet of the indoor heat exchange tubes directly reflects the temperature of the refrigerant when it enters the tubes, which is the initial temperature of the refrigerant before it evaporates indoors, and can be used as the minimum temperature T2.

[0077] For example, the present invention provides a temperature sensor at the liquid inlet of the indoor heat exchange tube to obtain the temperature at the liquid inlet of the indoor heat exchange tube.

[0078] Option two involves multiple detection points. This is achieved by setting up multiple different detection points on the indoor heat exchange tubes, such as... Figure 3 As shown, step S200 specifically includes:

[0079] Obtain the temperature of the indoor heat exchanger tubes at each detection point;

[0080] The lowest temperature is determined by comparing the multiple temperatures obtained.

[0081] By setting multiple different detection points on the indoor heat exchange tubes, temperature data can be obtained at different locations on the tubes. This provides a more comprehensive picture of the temperature distribution within the tubes, especially in situations with temperature gradients or significant differences in localized cooling effects. By comparing the temperatures at multiple detection points, the lowest temperature of the indoor heat exchange tubes can be determined more accurately, thus more effectively preventing condensation.

[0082] For example, the present invention provides temperature sensors at different locations (such as the inlet, middle section, outlet, etc.) of the indoor heat exchange tube to obtain the temperature at different locations of the indoor heat exchange tube.

[0083] Preferably, such as Figure 2 and Figure 3 As shown, step S300, "selectively adjusting the compressor frequency and / or adjusting the throttle valve opening according to T1 and T2," specifically includes:

[0084] The target temperature T5 of the indoor heat exchange tubes is calculated based on the dew point temperature T1 and the preset target superheat of the ground cooling system T4.

[0085] Compare T2 with T5;

[0086] If T2 < T5, adjust the compressor frequency and / or adjust the opening of the throttle valve to reduce the flow rate of refrigerant through the indoor heat exchange pipe, so that T2 ≥ T5.

[0087] The target temperature T5 of the indoor heat exchanger tubes is calculated based on the dew point temperature T1 and the preset target superheat of the underfloor cooling system T4. The target superheat of the underfloor cooling system T4 is a preset value that represents the minimum superheat that is desired to be maintained when the refrigerant evaporates in the indoor heat exchanger tubes, in order to prevent the refrigerant from condensing into liquid too early during the evaporation process and to avoid condensation on the indoor floor.

[0088] Next, the measured minimum temperature T2 of the indoor heat exchanger tube is compared with the target temperature T5. If T2 < T5, meaning the minimum temperature of the indoor heat exchanger tube is lower than the target temperature, it indicates a risk of condensation. In this case, the flow rate of refrigerant through the indoor heat exchanger tube can be reduced by adjusting the compressor frequency and / or the opening of the expansion valve. Adjusting the compressor frequency changes the refrigerant's circulation speed and pressure, thus affecting its temperature, while adjusting the expansion valve opening directly controls the refrigerant flow rate into the indoor heat exchanger tube.

[0089] Therefore, this invention can more accurately adjust the compressor frequency and / or throttle valve opening based on the dew point temperature T1 and the minimum temperature T2 of the indoor heat exchanger tubes, thereby effectively preventing condensation on the indoor floor. This method not only improves the precision of air conditioning control but also enhances the stability and energy efficiency of the system.

[0090] Preferably, the step of "calculating the target temperature T5 of the indoor heat exchanger tubes based on the dew point temperature T1 and the preset target superheat of the ground cooling system T4" specifically includes:

[0091] T5 = T1 - T4 + X;

[0092] Where X is a correction parameter and is a fixed value.

[0093] Preferably, the value of X is 1 to 2.

[0094] For example, in other embodiments, the value of X can also be other values ​​such as 3, 4, 5, etc. The selection of the correction parameter X can be determined based on the actual application scenario and experimental data to ensure the stability and energy efficiency of the air conditioning system. The present invention does not limit the specific value of X.

[0095] Preferably, in one embodiment, the step of "adjusting the compressor frequency and / or adjusting the opening of the throttle valve to reduce the flow rate of refrigerant through the indoor heat exchange pipe, so that T2≥T5" specifically includes:

[0096] First, reduce the compressor frequency by time t1, then determine whether T2≥T5 is satisfied;

[0097] If it is determined that T2≥T5, then the throttle valve will no longer be adjusted;

[0098] If it is determined that T2 < T5, then the opening of the throttle valve is further reduced until T2 ≥ T5;

[0099] First, try to reduce the refrigerant circulation speed and temperature by reducing the compressor frequency, thereby lowering the temperature of the indoor heat exchanger tube. After reducing the compressor frequency, wait for a period of time t1, and then measure the lowest temperature T2 of the indoor heat exchanger tube again.

[0100] If T2 now satisfies the condition T2≥T5, it means that reducing the compressor frequency is sufficient, and no further adjustment of the throttle valve is needed. If T2 is still less than T5, it means that reducing the compressor frequency is not effective enough, and the opening of the throttle valve needs to be further reduced.

[0101] After determining that further adjustment is needed, gradually reduce the opening of the throttle valve to decrease the refrigerant flow rate, thereby lowering the temperature of the indoor heat exchanger tubes. Furthermore, after each adjustment of the throttle valve, it is necessary to wait for a period of time and remeasure T2 until T2 meets the condition T2≥T5.

[0102] Preferably, in another embodiment, the step of "adjusting the compressor frequency and / or adjusting the opening of the throttle valve to reduce the flow rate of refrigerant through the indoor heat exchange pipe, so that T2≥T5" specifically includes:

[0103] First, reduce the opening of the throttle valve by time t2, and then determine whether T2≥T5 is satisfied;

[0104] If it is determined that T2≥T5, then the compressor frequency will no longer be adjusted;

[0105] If it is determined that T2 < T5, then the compressor frequency is reduced further until T2 ≥ T5.

[0106] In contrast to the first method, this time the refrigerant flow and temperature are reduced by decreasing the opening of the expansion valve, thereby lowering the temperature of the indoor heat exchanger tubes. After reducing the expansion valve opening, wait for a period of time t2, and then measure T2 again.

[0107] If T2 now satisfies the condition T2≥T5, it means that reducing the throttle valve opening is sufficient, and there is no need to adjust the compressor frequency further. If T2 is still less than T5, it means that reducing the throttle valve opening is not effective enough, and the compressor frequency needs to be further reduced.

[0108] After determining that further adjustments are needed, gradually reduce the compressor frequency to decrease the refrigerant circulation speed and temperature. Furthermore, after each compressor frequency adjustment, wait for a period of time and remeasure T2 until T2 satisfies the condition T2≥T5.

[0109] It should be noted that both of the above adjustment methods can ensure T2 ≥ T5, effectively preventing condensation on the indoor floor. The decision to adjust the compressor frequency or the throttle valve opening first can be made based on the actual situation and system requirements. In practical applications, the most suitable adjustment method should be selected by comprehensively considering factors such as system response speed, stability requirements, and energy efficiency.

[0110] Preferably, t1 is taken as 5 min to 10 min.

[0111] After adjusting the compressor frequency, the air conditioning system needs a certain amount of time to stabilize and for the new compressor frequency to reflect its impact on the indoor heat exchanger tube temperature. This time, t1, is used to wait for the system to reach a new stable state. In this invention, 5 to 10 minutes is a relatively reasonable time range, neither too long for the user to wait too long, nor too short for the system to be fully stabilized before the next measurement and adjustment.

[0112] Preferably, t2 is taken as 5 min to 10 min.

[0113] Similar to t1, after the air conditioning system adjusts the throttle valve opening, it also needs a certain amount of time to stabilize and for the new throttle valve opening to reflect its impact on the indoor heat exchanger tube temperature. This time t2 is also used to wait for the system to reach a new stable state. Again, 5 to 10 minutes is a relatively reasonable time range.

[0114] It should be noted that in practical applications, the specific values ​​of t1 and t2 can be comprehensively considered based on factors such as the specific model of the air conditioning system, changes in the indoor heat load, the user's sensitivity to temperature changes, and energy efficiency requirements. This invention does not limit the specific values ​​of t1 and t2.

[0115] In addition, the present invention also provides an air conditioner, including a controller configured to perform the control method described above.

[0116] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that, The air conditioner includes a compressor, an outdoor heat exchanger, a throttling valve, and an indoor heat exchange pipe connected to form a refrigerant circulation loop. The indoor heat exchange pipe is laid in the indoor floor. When the air conditioner is in cooling operation, the control method includes: S100: Obtain the dew point temperature T1 of the indoor environment; S200: Obtain the lowest temperature T2 of the indoor heat exchange tube; S300: Based on T1 and T2, selectively adjust the frequency of the compressor and / or adjust the opening of the throttle valve to prevent condensation from occurring on the indoor floor.

2. The air conditioning control method according to claim 1, characterized in that, Step S100 specifically includes: S110: Obtain indoor temperature T3 and humidity R; S120: Calculate the specific value of T1 based on T3 and R.

3. The air conditioning control method according to claim 2, characterized in that, The steps for "calculating the specific value of T1 based on T3 and R" include:

4. The air conditioning control method according to claim 1, characterized in that, A detection point is provided on the indoor heat exchange tube, and the detection point is located at the liquid inlet of the indoor heat exchange tube. Step S200 specifically includes: Obtain the temperature at the liquid inlet of the indoor heat exchange tube; or The indoor heat exchange tube is equipped with multiple different detection points. Step S200 specifically includes: The temperature of the indoor heat exchanger tube at each of the detection points is obtained; The lowest temperature is determined by comparing the multiple temperatures obtained.

5. The air conditioning control method according to claim 1, characterized in that, In step S300, the step of "selectively adjusting the frequency of the compressor and / or adjusting the opening of the throttle valve according to T1 and T2" specifically includes: The target temperature T5 of the indoor heat exchange tube is calculated based on the dew point temperature T1 and the preset ground cooling target superheat T4. Compare T2 with T5; If T2 < T5, then adjust the frequency of the compressor and / or adjust the opening of the throttle valve to reduce the flow rate of the refrigerant through the indoor heat exchange pipe, so that T2 ≥ T5.

6. The air conditioning control method according to claim 5, characterized in that, The steps of "calculating the target temperature T5 of the indoor heat exchanger tube based on the dew point temperature T1 and the preset target superheat of the ground cooling system T4" specifically include: T5 = T1 - T4 + X; Where X is a correction parameter and is a fixed value.

7. The air conditioning control method according to claim 6, characterized in that, The value of X ranges from 1 to 2.

8. The air conditioning control method according to claim 5, characterized in that, The steps of "adjusting the frequency of the compressor and / or adjusting the opening of the throttle valve to reduce the flow rate of the refrigerant through the indoor heat exchange pipe, so that T2≥T5" specifically include: First, reduce the frequency of the compressor by time t1, and then determine whether T2≥T5 is satisfied; If it is determined that T2≥T5, then the throttle valve will no longer be adjusted; If T2 < T5, then further reduce the opening of the throttle valve until T2 ≥ T5; or The steps of "adjusting the frequency of the compressor and / or adjusting the opening of the throttle valve to reduce the flow rate of the refrigerant through the indoor heat exchange pipe, so that T2≥T5" specifically include: First, reduce the opening degree t2 of the throttle valve, and then determine whether T2≥T5 is satisfied; If it is determined that T2≥T5, then the frequency of the compressor will no longer be adjusted; If it is determined that T2 < T5, then the frequency of the compressor is further reduced until T2 ≥ T5.

9. The air conditioning control method according to claim 8, characterized in that, The value of t1 is 5 min to 10 min, or The value of t2 ranges from 5 min to 10 min.

10. An air conditioner, characterized in that, Includes a controller configured to perform the control method according to any one of claims 1 to 9.

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