Control method of air conditioning equipment and air conditioning equipment

Abstract

The invention relates to the technical field of air conditioning equipment, particularly provides a control method of air conditioning equipment and the air conditioning equipment, and aims to solve the technical problems that the refrigeration effect is affected and refrigerant sound is generated due to insufficient supercooling degree caused by insufficient condensation of a refrigerant in a high-temperature environment by the existing air conditioning equipment. Therefore, the air conditioning equipment comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a water heat exchanger, a first electromagnetic valve and a first expansion valve, the outdoor heat exchanger is connected with the water heat exchanger in parallel, the first electromagnetic valve controls on-off of the water heat exchanger, and the control method comprises the steps that when the air conditioning equipment executes a refrigeration mode, the outdoor temperature is obtained; and selectively executing the first refrigeration mode or the second refrigeration mode according to the outdoor temperature. The air conditioning equipment is switched from the first refrigeration mode to the second refrigeration mode by opening the first electromagnetic valve in a high-temperature environment, the water heat exchanger can effectively share the condensation pressure of the outdoor heat exchanger, condensation of refrigerants is more sufficient, and the degree of supercooling is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and specifically provides a control method for an air conditioning equipment and an air conditioning equipment. Background Art

[0002] As a temperature regulating device, the air conditioner has been very mature in technology so far. It mainly transfers heat through the circulation of refrigerant to achieve the heat exchange between indoor and outdoor, so as to achieve the purpose of temperature regulation and keep the indoor temperature in a comfortable range, thus being widely popularized.

[0003] However, when the existing air conditioning equipment operates in high-temperature weather in summer, due to the high outdoor environmental temperature, the condenser cannot fully condense the high-temperature and high-pressure gaseous refrigerant discharged by the compressor, resulting in insufficient subcooling degree and affecting the refrigeration effect. At the same time, the refrigerant in a gas-liquid mixture will also generate refrigerant noise, affecting the user experience.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above technical problems, that is, the technical problems that the existing air conditioning equipment does not fully condense the refrigerant in a high-temperature environment, resulting in insufficient subcooling degree and affecting the refrigeration effect, and generating refrigerant noise.

[0006] The present invention provides a control method for an air conditioning equipment. The air conditioning equipment includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a water heat exchanger, a first solenoid valve and a first expansion valve. The exhaust port of the compressor, the first end of the water heat exchanger and the first end of the outdoor heat exchanger are interconnected. The second end of the water heat exchanger is connected to the first end of the first solenoid valve. The second end of the first solenoid valve, the second end of the outdoor heat exchanger and the second end of the first expansion valve are interconnected. The first end of the first expansion valve is connected to the second end of the indoor heat exchanger. The first end of the indoor heat exchanger is connected to the suction port of the compressor. The control method includes: when the air conditioning equipment executes the refrigeration mode, obtaining the outdoor temperature; selectively executing a first refrigeration mode or a second refrigeration mode according to the outdoor temperature; wherein, when executing the first refrigeration mode, closing the first solenoid valve to make the refrigerant condense only through the outdoor heat exchanger; when executing the second refrigeration mode, opening the first solenoid valve to make the refrigerant condense through the outdoor heat exchanger and the water heat exchanger respectively.

[0007] In the preferred technical solution of the above control method of the air conditioning device, the specific steps of "selectively executing the first refrigeration mode or the second refrigeration mode according to the outdoor temperature" include: comparing the outdoor temperature with a preset temperature; and selectively executing the first refrigeration mode or the second refrigeration mode according to the comparison result.

[0008] In the preferred technical solution of the above control method of the air conditioning device, the specific steps of "selectively executing the first refrigeration mode or the second refrigeration mode according to the comparison result" include: if the outdoor temperature is lower than the preset temperature, execute the first refrigeration mode; if the outdoor temperature is not lower than the preset temperature, execute the second refrigeration mode.

[0009] In the preferred technical solution of the above control method of the air conditioning device, the air conditioning device further includes a second solenoid valve, a second expansion valve, a first four-way valve, a second four-way valve, and a floor heating heat exchanger. The D port of the first four-way valve is communicated with the exhaust port of the compressor, the S port of the first four-way valve is communicated with the suction port of the compressor, the C port of the first four-way valve is communicated with the first end of the water heat exchanger, the E port of the first four-way valve is communicated with the first end of the indoor heat exchanger, the D port of the second four-way valve is communicated with the exhaust port of the compressor, the S port of the second four-way valve is communicated with the suction port of the compressor, the C port of the second four-way valve is communicated with the first end of the outdoor heat exchanger, the E port of the second four-way valve is communicated with the first end of the second solenoid valve, the second end of the second solenoid valve is communicated with the first end of the water heat exchanger, the second end of the first solenoid valve is communicated with the first end of the floor heating heat exchanger, the second end of the outdoor heat exchanger is communicated with the first end of the second expansion valve, the second ends of the floor heating heat exchanger, the first expansion valve, and the second expansion valve are communicated with each other. The control method further includes: when the air conditioning device executes the heating mode, obtaining the indoor temperature; obtaining the target temperature; making the D port of the first four-way valve communicate with the E port of the first four-way valve, and the S port of the first four-way valve communicate with the C port of the first four-way valve; making the D port of the second four-way valve communicate with the E port of the second four-way valve, and the S port of the second four-way valve communicate with the C port of the second four-way valve; adjusting the opening degree of the second expansion valve to a set opening degree; and selectively opening the first solenoid valve, the second solenoid valve, and / or the first expansion valve according to the indoor temperature and the target temperature.

[0010] In the preferred technical solution of the control method of the above air-conditioning equipment, the specific steps of "selectively opening the first solenoid valve, the second solenoid valve, and / or the first expansion valve according to the indoor temperature and the target temperature" include: selectively executing one of a first heating mode, a second heating mode, or a third heating mode according to the indoor temperature and the target temperature; wherein, when executing the first heating mode, opening the first solenoid valve and the second solenoid valve so that the refrigerant can sequentially pass through the water heat exchanger and the floor heating heat exchanger to release heat to achieve independent heating of the floor heating; when executing the second heating mode, opening the first expansion valve so that the refrigerant can release heat through the indoor heat exchanger to achieve independent heating of the air conditioner; when executing the third heating mode, opening the first solenoid valve, the second solenoid valve, and the first expansion valve so that the refrigerant can release heat through the indoor heat exchanger and the floor heating heat exchanger respectively to achieve simultaneous heating of the air conditioner and the floor heating.

[0011] In the preferred technical solution of the control method of the above air-conditioning equipment, the specific steps of "selectively executing one of a first heating mode, a second heating mode, or a third heating mode according to the indoor temperature and the target temperature" include: calculating the difference between the target temperature and the indoor temperature; comparing the difference with a first preset value and a second preset value, wherein the first preset value is greater than the second preset value; and selectively executing one of the first heating mode, the second heating mode, or the third heating mode according to the comparison result.

[0012] In the preferred technical solution of the control method of the above air-conditioning equipment, the specific steps of "selectively executing one of the first heating mode, the second heating mode, or the third heating mode according to the comparison result" include: if the difference is less than or equal to the second preset value, executing the first heating mode; if the difference is greater than the second preset value and less than or equal to the first preset value, executing the second heating mode; and if the difference is greater than the first preset value, executing the third heating mode.

[0013] In the preferred technical solution of the control method of the above air-conditioning equipment, the control method further includes: when executing the second heating mode, adjusting the opening degree of the first expansion valve to the maximum opening degree; and / or when executing the third heating mode, adjusting the opening degree of the first expansion valve to the maximum opening degree.

[0014] In the preferred technical solution of the control method of the above air-conditioning equipment, the set opening degree is greater than the minimum opening degree of the second expansion valve and less than the maximum opening degree of the second expansion valve.

[0015] In the preferred technical solution of the above control method of the air-conditioning device, the air-conditioning device includes a controller configured to be able to execute the above control method.

[0016] In the case of adopting the above technical solution, the air-conditioning device of the present invention includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a water heat exchanger, a first solenoid valve, and a first expansion valve. The exhaust port of the compressor, the first end of the water heat exchanger, and the first end of the outdoor heat exchanger are interconnected. The second end of the water heat exchanger is connected to the first end of the first solenoid valve. The second end of the first solenoid valve, the second end of the outdoor heat exchanger, and the second end of the first expansion valve are interconnected. The first end of the first expansion valve is connected to the second end of the indoor heat exchanger. The first end of the indoor heat exchanger is connected to the suction port of the compressor. The control method includes: when the air-conditioning device executes the cooling mode, obtaining the outdoor temperature; selectively executing a first cooling mode or a second cooling mode according to the outdoor temperature; wherein, when executing the first cooling mode, closing the first solenoid valve to enable the refrigerant to condense only through the outdoor heat exchanger; when executing the second cooling mode, opening the first solenoid valve to enable the refrigerant to condense through the outdoor heat exchanger and the water heat exchanger respectively. Through such a setting, when the air-conditioning device turns on the cooling mode in high-temperature weather, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor can be divided into two parts. One part enters the outdoor heat exchanger for conventional cooling and condensation, and the other part enters the water heat exchanger to exchange heat with the circulating water path to achieve condensation. This can not only fully condense the high-temperature and high-pressure gaseous refrigerant, eliminate refrigerant noise, and increase the subcooling degree, but also keep the compressor running at a high frequency to provide a large exhaust volume and ensure a good cooling effect.

[0017] Further, the control method of the air-conditioning device of the present invention further includes: comparing the outdoor temperature with a preset temperature; selectively executing a first cooling mode or a second cooling mode according to the comparison result. Through such a setting, the cooling mode of the air conditioner is divided into two modes, and by setting the preset temperature, the outdoor temperature is divided into two intervals, so that the two cooling modes of the air-conditioning device match the two outdoor temperature intervals, improving the cooling efficiency of the air-conditioning device.

[0018] Still further, the control method of the air-conditioning device of the present invention further includes: if the outdoor temperature is lower than the preset temperature, executing the first cooling mode; if the outdoor temperature is not lower than the preset temperature, executing the second cooling mode. Through such a setting, the air-conditioning device only needs to connect the outdoor heat exchanger for condensation in a lower-temperature environment, while in a higher-temperature environment, it needs to connect the outdoor heat exchanger and the water heat exchanger at the same time to jointly condense the refrigerant, so as to increase the subcooling degree and improve the condensation effect in a high-temperature environment, ensuring that the air-conditioning device can exert the maximum cooling efficiency in different temperature intervals, and at the same time facilitating energy consumption control and cost saving.

[0019] Furthermore, the control method of the air conditioning device of the present invention further includes: the air conditioning device further includes a second solenoid valve, a second expansion valve, a first four-way valve, a second four-way valve, and a floor heating heat exchanger. The D port of the first four-way valve is communicated with the exhaust port of the compressor, the S port of the first four-way valve is communicated with the suction port of the compressor, the C port of the first four-way valve is communicated with the first end of the water heat exchanger, and the E port of the first four-way valve is communicated with the first end of the indoor heat exchanger. The D port of the second four-way valve is communicated with the exhaust port of the compressor, the S port of the second four-way valve is communicated with the suction port of the compressor, the C port of the second four-way valve is communicated with the first end of the outdoor heat exchanger, and the E port of the second four-way valve is communicated with the first end of the second solenoid valve. The second end of the second solenoid valve is communicated with the first end of the water heat exchanger, the second end of the first solenoid valve is communicated with the first end of the floor heating heat exchanger, the second end of the outdoor heat exchanger is communicated with the first end of the second expansion valve, and the second ends of the floor heating heat exchanger, the first expansion valve, and the second expansion valve are communicated with each other. The control method further includes: when the air conditioning device executes the heating mode, obtaining the indoor temperature; obtaining the target temperature; making the D port of the first four-way valve communicate with the E port of the first four-way valve, and the S port of the first four-way valve communicate with the C port of the first four-way valve; making the D port of the second four-way valve communicate with the E port of the second four-way valve, and the S port of the second four-way valve communicate with the C port of the second four-way valve; adjusting the opening degree of the second expansion valve to a set opening degree; and selectively opening the first solenoid valve, the second solenoid valve, and / or the first expansion valve according to the indoor temperature and the target temperature. Through such a setting, the air conditioning device can also realize multiple heating modes with different intensities to match different indoor temperatures and target temperatures, thereby meeting the heating requirements in different environments and improving the adaptability and functionality of the air conditioning device.

[0020] Furthermore, the control method of the air conditioning device of the present invention further includes: selectively executing one of a first heating mode, a second heating mode, or a third heating mode according to the indoor temperature and the target temperature; wherein, when executing the first heating mode, opening the first solenoid valve and the second solenoid valve so that the refrigerant can sequentially pass through the water heat exchanger and the floor heating heat exchanger to release heat to realize the separate heating of the floor heating; when executing the second heating mode, opening the first expansion valve so that the refrigerant can release heat through the indoor heat exchanger to realize the separate heating of the air conditioner; when executing the third heating mode, opening the first solenoid valve, the second solenoid valve, and the first expansion valve so that the refrigerant can release heat through the indoor heat exchanger and the floor heating heat exchanger respectively to realize the simultaneous heating of the air conditioner and the floor heating. Through such a setting, the air conditioning device has three heating modes and can be switched according to the changes in the indoor temperature and the target temperature to meet the heating requirements in different environments, making the air conditioning device have stronger adaptability and functionality.

[0021] Furthermore, the control method of the air conditioning device of the present invention further includes: calculating the difference between the target temperature and the indoor temperature; comparing the difference with a first preset value and a second preset value, where the first preset value is greater than the second preset value; and selectively executing one of a first heating mode, a second heating mode, or a third heating mode according to the comparison result. Through such a setting, the air conditioning device can use the difference between the target temperature and the indoor temperature as a variable to switch among the three heating modes of the air conditioning device, and divide the difference into three intervals, so that the three heating modes match the three difference intervals, thereby making the operation of the air conditioning device more accurate and more practical.

[0022] Furthermore, the control method of the air conditioning device of the present invention further includes: if the difference is less than or equal to the second preset value, execute the first heating mode; if the difference is greater than the second preset value and less than or equal to the first preset value, execute the second heating mode; if the difference is greater than the first preset value, execute the third heating mode. Through such a setting, that is, dividing the range of the difference into three intervals, the three intervals can truly reflect the temperature difference between the indoor temperature and the target temperature, and then select different intensities of heating modes, so that the heating efficiency and power consumption of the air conditioning device can be balanced as much as possible.

[0023] Furthermore, the control method of the air conditioning device of the present invention further includes: when executing the second heating mode, adjusting the opening degree of the first expansion valve to the maximum opening degree; and / or when executing the third heating mode, adjusting the opening degree of the first expansion valve to the maximum opening degree. Through such a setting, it can ensure that the refrigerant flow rate in the circulation pipeline reaches the maximum, achieve the highest heat exchange efficiency, and improve the heating effect.

[0024] Furthermore, the control method of the air conditioning device of the present invention further includes: setting an opening degree greater than the minimum opening degree of the second expansion valve and less than the maximum opening degree of the second expansion valve. Through such a setting, the second expansion valve can play a good throttling role in the heating mode and realize the pressure reduction of the refrigerant.

[0025] In addition, the air conditioning device further provided by the present invention on the basis of the above technical solution adopts the above control method, and thus has the technical effects possessed by the above control method. Compared with the air conditioning device before improvement, the air conditioning device of the present invention condenses the refrigerant more fully, improves the subcooling degree, enhances the refrigeration effect, and eliminates the refrigerant noise at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, in which:

[0027] Figure 1 is a schematic diagram of the operation of the air conditioning device of the present invention;

[0028] Figure 2 is a flowchart of the control method of the present invention;

[0029] Figure 3 is a flowchart of the first embodiment of the control method of the present invention;

[0030] Figure 4 is a flowchart of the second embodiment of the control method of the present invention.

[0031] List of reference numerals:

[0032] 1. Compressor; 21. Indoor heat exchanger; 22. Outdoor heat exchanger; 23. Water heat exchanger; 231. First heat exchange pipeline; 232. Second heat exchange pipeline; 31. First expansion valve; 32. Second expansion valve; 41. First four-way valve; 42. Second four-way valve; 51. First solenoid valve; 52. Second solenoid valve. Detailed implementation manners

[0033] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0034] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "inner", "outer", "upper", "lower", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "connected", "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] Based on the technical problem pointed out in the background art that the existing air conditioning equipment has insufficient condensation of the refrigerant in a high-temperature environment, resulting in insufficient subcooling degree, affecting the refrigeration effect, and generating refrigerant noise. The present invention provides a control method for an air conditioner and an air conditioning equipment, aiming to add a water heat exchanger and a first solenoid valve to the existing air conditioning equipment, so that the water heat exchanger and the first solenoid valve form an independent circulation pipeline and are connected in parallel with the circulation pipeline where the outdoor heat exchanger is located. The on-off of the water heat exchanger can be controlled by the first solenoid valve. The control method includes: when the air conditioning equipment executes the refrigeration mode, obtaining the outdoor temperature; according to the outdoor temperature, selectively executing the first refrigeration mode or the second refrigeration mode, and realizing the switching between the first refrigeration mode and the second refrigeration mode of the air conditioning equipment by controlling the on-off of the first solenoid valve. Thereby enabling the air conditioning equipment to execute a suitable refrigeration mode according to the change of the outdoor temperature, further enabling the air conditioning equipment to maintain a good refrigeration effect, prevent the generation of refrigerant noise, and at the same time be beneficial to saving energy consumption and controlling the use cost.

[0037] Specifically, as Figure 1 shown, the air conditioning equipment of the present invention includes a compressor 1, an indoor heat exchanger 21, an outdoor heat exchanger 22, a water heat exchanger 23, a first solenoid valve 51, and a first expansion valve 31. The exhaust port of the compressor 1, the first end of the water heat exchanger 23, and the first end of the outdoor heat exchanger 22 are interconnected. The second end of the water heat exchanger 23 is connected to the first end of the first solenoid valve 51. The second end of the first solenoid valve 51, the second end of the outdoor heat exchanger 22, and the second end of the first expansion valve 31 are interconnected. The first end of the first expansion valve 31 is connected to the second end of the indoor heat exchanger 21. The first end of the indoor heat exchanger 21 is connected to the suction port of the compressor 1.

[0038] Compared with the traditional air conditioning equipment, the air conditioning equipment of the present invention is additionally provided with a water heat exchanger 23 and a first solenoid valve 51. The water heat exchanger 23 is connected in parallel with the outdoor heat exchanger 22. The first solenoid valve 51 is arranged at one end of the water heat exchanger 23 and can control the on-off of the first solenoid valve 51. The water heat exchanger 23 includes a first heat exchange pipeline 231 and a second heat exchange pipeline 232 which are closely arranged with each other. Among them, the two ends of the first heat exchange pipeline 231 are respectively connected to the exhaust port of the compressor 1 and the first end of the first solenoid valve 51. The two ends of the second heat exchange pipeline 232 are connected to a water source, forming a water circulation pipeline. The water source can be set as a water storage container such as a water tank or a water bucket. A water pump is also installed on the second heat exchange pipeline 232. The water in the water storage container can circulate in the second heat exchange pipeline 232 under the action of the water pump and exchange heat with the refrigerant in the first heat exchange pipeline 231 to cool and condense the high-temperature and high-pressure gaseous refrigerant in the first heat exchange pipeline 231. At the same time, the circulating water realizes the increase of its own temperature by absorbing heat, and the high-temperature circulating water can also be used as domestic water.

[0039] It should be noted that, in actual applications, the first heat exchange pipeline 231 and the second heat exchange pipeline 232 can have a variety of closely arranged forms to achieve heat exchange between the two. For example, the two can be closely fitted, closely crossed, or in the form of shell and tube heat exchange, that is, one pipeline is arranged outside the other pipeline, etc. Such flexible adjustment and change does not deviate from the principle and scope of the present invention and should be limited within the protection scope of the present invention.

[0040] Preferably, the present invention preferably adopts the form of sleeve heat exchange. Specifically, the inner diameter of the second heat exchange pipeline 232 is larger than the outer diameter of the first heat exchange pipeline 231. The second heat exchange pipeline 232 is sleeved on the first heat exchange pipeline 231, so that the circulating water flows between the outer wall of the first heat exchange pipeline 231 and the inner wall of the second heat exchange pipeline 232, thereby forming a heat exchange channel. In the heat exchange channel, the circulating water flow can directly contact the first heat exchange pipeline 231, so that the heat conduction between the first heat exchange pipeline 231 and the second heat exchange pipeline 232 is faster and more direct, which effectively improves the heat exchange efficiency between the first heat exchange pipeline 231 and the second heat exchange pipeline 232, thereby improving the condensation effect and supercooling degree of the air-conditioning equipment.

[0041] When the first solenoid valve 51 is in a closed state, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 all flows through the outdoor heat exchanger 22 to be condensed, and finally returns to the compressor 1 to complete the refrigeration cycle.

[0042] When the first solenoid valve 51 is in an open state, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 will be divided into two paths. The first path enters the outdoor heat exchanger 22 for conventional cooling and condensation, and the second path enters the first heat exchange pipeline 231 in the water heat exchanger 23, and exchanges heat with the circulating water in the second heat exchange pipeline 232 during the flow, which can also condense the refrigerant, so that the water heat exchanger 23 can share the condensation pressure with the outdoor heat exchanger 22. After condensation, the two parts of the refrigerant are converted into low-temperature and high-pressure liquids, and after merging, they flow into the first electronic expansion valve and the indoor heat exchanger 21 together, and finally flow back to the compressor 1 after throttling and pressure reduction and external heat absorption, completing the refrigeration cycle of the air-conditioning equipment under high temperature environment.

[0043] This arrangement enables the air-conditioning equipment to not only fully condense the refrigerant in a high-temperature environment, improve the degree of supercooling, and prevent the generation of refrigerant noise, but also eliminates the need to reduce the frequency of the compressor 1, thereby maintaining the high-frequency operation of the compressor 1 to provide a larger exhaust volume, and maintaining a larger refrigerant flow rate in the circulation pipeline, so as to maintain a high heat exchange efficiency of the air-conditioning equipment and ensure a good cooling effect.

[0044] It should be noted that both the indoor heat exchanger 21 and the outdoor heat exchanger 22 can be set as finned heat exchangers, duct heat exchangers, liquid heat exchangers, etc., and the present solution does not make specific restrictions.

[0045] Preferably, as Figure 1 and Figure 2 shown, after receiving a control instruction, the control method of the air-conditioning equipment of the present invention includes the following steps:

[0046] S100: When the air-conditioning equipment executes the refrigeration mode, obtain the outdoor temperature;

[0047] S200: According to the outdoor temperature, selectively execute the first refrigeration mode or the second refrigeration mode;

[0048] Wherein, when executing the first refrigeration mode, close the first solenoid valve 51 so that the refrigerant only condenses through the outdoor heat exchanger 22;

[0049] When executing the second refrigeration mode, open the first solenoid valve 51 so that the refrigerant condenses through the outdoor heat exchanger 22 and the water heat exchanger 23 respectively.

[0050] When the air-conditioning equipment operates in the refrigeration mode, especially when the outdoor temperature is very high, relying solely on the outdoor heat exchanger 22 cannot completely condense the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 1, resulting in insufficient subcooling degree and affecting the refrigeration effect.

[0051] Therefore, this control method can achieve precise control of the air-conditioning equipment. By using the ambient temperature sensor to obtain the outdoor temperature in real time and switching the refrigeration mode of the air-conditioning equipment according to different outdoor temperatures at any time, the air-conditioning equipment can always operate in a reasonable working mode. It can not only fully condense the high-temperature and high-pressure gaseous refrigerant, improve the subcooling degree of the air-conditioning equipment, eliminate the refrigerant noise, but also keep the compressor 1 running at a high frequency to provide a large exhaust volume to ensure the best refrigeration effect. In addition, it helps to reduce power consumption and achieve cost control.

[0052] Preferably, as Figures 1 to 3 shown, the specific steps of "selectively execute the first refrigeration mode or the second refrigeration mode according to the outdoor temperature" include:

[0053] S210: Compare the outdoor temperature with a preset temperature;

[0054] S220: According to the comparison result, selectively execute the first refrigeration mode or the second refrigeration mode.

[0055] Exemplarily, by analyzing the experimental data of the air conditioning equipment operating at high temperatures and the data recorded during actual use, the preset temperature is reasonably set to 35°C. Thus, the operating temperature of the air conditioning equipment is divided into two intervals, namely below 35°C and not lower than 35°C.

[0056] And the two cooling modes of the air conditioning equipment are respectively matched with the two temperature intervals to achieve the automatic selection and switching of the two cooling modes of the air conditioning equipment, and then the maximum efficiency of the air conditioning equipment can be exerted to control the usage cost.

[0057] Preferably, as Figures 1 to 3 shown, the specific steps of "selectively executing the first cooling mode or the second cooling mode according to the comparison result" include:

[0058] S221: If the outdoor temperature is lower than the preset temperature, then execute the first cooling mode;

[0059] S222: If the outdoor temperature is not lower than the preset temperature, then execute the second cooling mode.

[0060] When the outdoor temperature is lower than the preset temperature, that is, the outdoor temperature is lower than 35°C, it means that relying solely on the outdoor heat exchanger 22 can ensure the full condensation of the refrigerant, and there will be no obvious attenuation of the refrigeration efficiency or generation of refrigerant noise in the air conditioning equipment. At this time, the system will control the first solenoid valve 51 to close, so that the air conditioning equipment executes the first cooling mode.

[0061] When the outdoor temperature is not lower than the preset temperature, that is, the outdoor temperature reaches or is higher than 35°C, relying solely on the outdoor heat exchanger 22 can no longer ensure the complete condensation of the refrigerant, and there will be obvious refrigeration attenuation and refrigerant noise in the air conditioner. At this time, the system will control the first solenoid valve 51 to open to connect the water heat exchanger 23, so that the air conditioning equipment executes the second cooling mode.

[0062] It can be seen that the air conditioning equipment only needs to connect the outdoor heat exchanger 22 for condensation in a lower temperature environment, while in a higher temperature environment, it needs to connect both the outdoor heat exchanger 22 and the water heat exchanger 23 to enhance the condensation effect in the high temperature environment. This can not only ensure sufficient condensation effect and subcooling degree of the air conditioning equipment in different temperature intervals, but also be conducive to energy consumption control and cost saving.

[0063] Preferably, as Figures 1 to 3As shown in the figure, the air-conditioning equipment of the present invention further includes a second solenoid valve 52, a second expansion valve 32, a first four-way valve 41, a second four-way valve 42, and a floor heating heat exchanger. The D port of the first four-way valve 41 is connected to the exhaust port of the compressor 1, the S port of the first four-way valve 41 is connected to the suction port of the compressor 1, the C port of the first four-way valve 41 is connected to the first end of the water heat exchanger 23, and the E port of the first four-way valve 41 is connected to the first end of the indoor heat exchanger 21. The D port of the second four-way valve 42 is connected to the exhaust port of the compressor 1, the S port of the second four-way valve 42 is connected to the suction port of the compressor 1, the C port of the second four-way valve 42 is connected to the first end of the outdoor heat exchanger 22, and the E port of the second four-way valve 42 is connected to the first end of the second solenoid valve 52. The second end of the second solenoid valve 52 is connected to the first end of the water heat exchanger 23. The second end of the first solenoid valve 51 is connected to the first end of the floor heating heat exchanger. The second end of the outdoor heat exchanger 22 is connected to the first end of the second expansion valve 32. The second ends of the floor heating heat exchanger, the second end of the first expansion valve 31, and the second end of the second expansion valve 32 are interconnected.

[0064] Preferably, as Figure 1 and Figure 4 shown in the figure, the control method of the present invention further includes:

[0065] S300: When the air-conditioning equipment executes the heating mode, obtain the indoor temperature;

[0066] S400: Obtain the target temperature;

[0067] S500: Connect the D port of the first four-way valve 41 to the E port of the first four-way valve 41, and connect the S port of the first four-way valve 41 to the C port of the first four-way valve 41;

[0068] S600: Connect the D port of the second four-way valve 42 to the E port of the second four-way valve 42, and connect the S port of the second four-way valve 42 to the C port of the second four-way valve 42;

[0069] S700: Adjust the opening degree of the second expansion valve 32 to the set opening degree;

[0070] S800: Selectively open the first solenoid valve 51, the second solenoid valve 52, and / or the first expansion valve 31 according to the indoor temperature and the target temperature.

[0071] By adjusting and controlling each valve, the flow direction of the refrigerant in the circulation pipeline can be changed, so that the air-conditioning equipment can further realize a variety of other working modes to match different indoor temperatures and target temperatures, improving the adaptability and functionality of the air-conditioning equipment.

[0072] It should be noted that the present invention does not limit the specific value of the set opening degree. Those skilled in the art can flexibly set it according to experiments or experience in actual applications.

[0073] Preferably, the set opening degree is greater than the minimum opening degree of the second expansion valve 32 and less than the maximum opening degree of the second expansion valve 32.

[0074] Preferably, as Figures 1 to 4 shown, the specific steps of "selectively opening the first solenoid valve 51, the second solenoid valve 52, and / or the first expansion valve 31 according to the indoor temperature and the target temperature" include:

[0075] Selectively execute one of the first heating mode, the second heating mode, or the third heating mode according to the indoor temperature and the target temperature;

[0076] Among them, when executing the first heating mode, open the first solenoid valve 51 and the second solenoid valve 52, so that the refrigerant can sequentially pass through the water heat exchanger 23 and the floor heating heat exchanger to release heat to achieve the separate heating of the floor heating;

[0077] When executing the second heating mode, open the first expansion valve 31, so that the refrigerant can release heat through the indoor heat exchanger 21 to achieve the separate heating of the air conditioner;

[0078] When executing the third heating mode, open the first solenoid valve 51, the second solenoid valve 52, and the first expansion valve 31, so that the refrigerant can release heat through the indoor heat exchanger 21 and the floor heating heat exchanger respectively to achieve the simultaneous heating of the air conditioner and the floor heating.

[0079] In the heating mode of the air conditioning device, the user will set a target temperature, and at the same time the system will obtain the indoor temperature in real time through the ambient temperature sensor. The control system establishes a correlation function with the target temperature and the indoor temperature as variables, so that the changes of the target temperature and the indoor temperature are associated with three different heating modes. According to the working principles of the three heating modes, the selection of the three heating modes is essentially the selection of three different heating intensities. Therefore, the control system matches the three heating modes with different indoor temperatures and target temperatures respectively, and can automatically switch according to the changes of the indoor temperature and the target temperature, improving the adaptability of the air conditioning device to the environment and the degree of intelligence.

[0080] Preferably, as Figures 1 to 4 shown, the specific steps of "selectively executing one of the first heating mode, the second heating mode, or the third heating mode according to the indoor temperature and the target temperature" include:

[0081] S810: Calculate the difference between the target temperature and the indoor temperature;

[0082] S820: Compare the difference with a first preset value and a second preset value, where the first preset value is greater than the second preset value;

[0083] S830: Selectively execute one of the first heating mode, the second heating mode, or the third heating mode according to the comparison result.

[0084] The specific logic of the control method of the present invention is to first calculate the difference between the target temperature and the indoor temperature. Since the difference can accurately reflect the magnitude of the temperature difference between the indoor temperature and the target temperature, and thus can determine the magnitude of the required heating intensity at present through the temperature difference. The larger the difference, the greater the required heating intensity.

[0085] It should be noted that compared with the floor heating alone for heating, the room temperature rises faster when the air conditioner heats alone, but the power consumption is larger.

[0086] Therefore, in the air conditioner device of the present invention, the intensity of the first heating mode is less than the intensity of the second heating mode is less than the intensity of the third heating mode. The temperature difference range is divided into three intervals by the first preset value and the second preset value. The control system will match the three heating intensities with the three temperature difference intervals, making the operation of the air conditioner device more accurate and more practical.

[0087] Preferably, as Figures 1 to 4 shown, the specific steps of "selectively execute one of the first heating mode, the second heating mode, or the third heating mode according to the comparison result" include:

[0088] S831: If the difference is less than or equal to the second preset value, execute the first heating mode;

[0089] S832: If the difference is greater than the second preset value and less than or equal to the first preset value, execute the second heating mode;

[0090] S833: If the difference is greater than the first preset value, execute the third heating mode.

[0091] Exemplarily, the first preset value is set to 5°C, and the second preset value is set to 10°C.

[0092] When the difference between the target temperature and the actual temperature is not greater than 5°C, it indicates that the indoor temperature is not very low and the required heating intensity is not high. The system will control the air conditioner device to automatically execute the first heating mode, that is, turn on the floor heating alone for heating.

[0093] When the difference between the target temperature and the actual temperature is between 5°C and 10°C (including 10°C), it indicates that the room temperature is relatively low at this time and medium-intensity heating needs to be turned on to quickly raise the temperature. The system will control the air conditioner device to automatically execute the second heating mode, that is, turn on the air conditioner alone for heating.

[0094] When the difference between the target temperature and the actual temperature is greater than 10 °C, it indicates that the indoor temperature is very low at this time, and the strongest heating mode needs to be turned on to quickly raise the temperature. At this time, the system will automatically execute the third heating mode, that is, turn on the air conditioner and the floor heating simultaneously for combined heating.

[0095] Through such a setting, that is, dividing the range of the difference into three intervals, the three intervals can truly reflect the temperature difference between the indoor temperature and the target temperature, as well as the heating intensity required for different temperature difference ranges. Then, according to the required heating intensity, a suitable heating mode is selected to make the heating efficiency and power consumption reach balance as much as possible.

[0096] Preferably, as Figures 1 to 4 shown, the control method of the air-conditioning equipment of the present invention further includes:

[0097] When executing the second heating mode, adjust the opening degree of the first expansion valve 31 to the maximum opening degree; and / or when executing the third heating mode, adjust the opening degree of the first expansion valve 31 to the maximum opening degree.

[0098] The opening degree of the first expansion valve 31 can be freely adjusted to control the refrigerant flow rate of the first expansion valve 31. In the heating mode of the air-conditioning equipment, it is preferably to adjust the opening degree of the first expansion valve 31 to the maximum to ensure a large enough refrigerant flow rate in the circulation pipeline, achieve the highest heat exchange efficiency, and help improve the heating effect.

[0099] Through such a setting, the second expansion valve 32 can play a good throttling role in the heating mode to achieve the pressure reduction of the refrigerant.

[0100] Finally, the present invention also provides an air-conditioning equipment, which includes a controller configured to be able to execute the above control method.

[0101] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle 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 these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A control method for an air conditioning device, characterized in that, The air conditioning equipment includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a water heat exchanger, a first solenoid valve, and a first expansion valve. The exhaust port of the compressor, the first end of the water heat exchanger, and the first end of the outdoor heat exchanger are interconnected. The second end of the water heat exchanger is connected to the first end of the first solenoid valve. The second end of the first solenoid valve, the second end of the outdoor heat exchanger, and the second end of the first expansion valve are interconnected. The first end of the first expansion valve is connected to the second end of the indoor heat exchanger. The first end of the indoor heat exchanger is connected to the suction port of the compressor. The control method includes: When the air conditioning equipment operates in the cooling mode, Obtain the outdoor temperature; Selectively execute the first cooling mode or the second cooling mode according to the outdoor temperature; Among them, when the first cooling mode is executed, close the first solenoid valve so that the refrigerant only condenses through the outdoor heat exchanger; When the second cooling mode is executed, open the first solenoid valve so that the refrigerant condenses through the outdoor heat exchanger and the water heat exchanger respectively.

2. The control method according to claim 1, wherein The specific steps of "selectively execute the first cooling mode or the second cooling mode according to the outdoor temperature" include: Compare the outdoor temperature with a preset temperature; Selectively execute the first cooling mode or the second cooling mode according to the comparison result.

3. The control method according to claim 2, wherein The specific steps of "selectively execute the first cooling mode or the second cooling mode according to the comparison result" include: If the outdoor temperature is lower than the preset temperature, execute the first cooling mode; If the outdoor temperature is not lower than the preset temperature, execute the second cooling mode.

4. The control method according to claim 1, wherein The air conditioning equipment further includes a second solenoid valve, a second expansion valve, a first four-way valve, a second four-way valve, and a floor heating heat exchanger. The D port of the first four-way valve is connected to the exhaust port of the compressor. The S port of the first four-way valve is connected to the suction port of the compressor. The C port of the first four-way valve is connected to the first end of the water heat exchanger. The E port of the first four-way valve is connected to the first end of the indoor heat exchanger. The D port of the second four-way valve is connected to the exhaust port of the compressor. The S port of the second four-way valve is connected to the suction port of the compressor. The C port of the second four-way valve is connected to the first end of the outdoor heat exchanger. The E port of the second four-way valve is connected to the first end of the second solenoid valve. The second end of the second solenoid valve is connected to the first end of the water heat exchanger. The second end of the first solenoid valve is connected to the first end of the floor heating heat exchanger. The second end of the outdoor heat exchanger is connected to the first end of the second expansion valve. The second end of the floor heating heat exchanger, the second end of the first expansion valve, and the second end of the second expansion valve are interconnected. The control method further includes: When the air conditioning equipment operates in the heating mode, Obtain the indoor temperature; Obtain the target temperature; Connect the D port of the first four-way valve to the E port of the first four-way valve, and connect the S port of the first four-way valve to the C port of the first four-way valve; Connect the D port of the second four-way valve to the E port of the second four-way valve, and connect the S port of the second four-way valve to the C port of the second four-way valve; Adjust the opening degree of the second expansion valve to a set opening degree; Selectively open the first solenoid valve, the second solenoid valve, and / or the first expansion valve according to the indoor temperature and the target temperature.

5. The control method according to claim 4, wherein The specific steps of "selectively opening the first solenoid valve, the second solenoid valve, and / or the first expansion valve according to the indoor temperature and the target temperature" include: Selectively execute one of a first heating mode, a second heating mode, or a third heating mode according to the indoor temperature and the target temperature; Wherein, when executing the first heating mode, open the first solenoid valve and the second solenoid valve so that the refrigerant can sequentially pass through the water heat exchanger and the floor heating heat exchanger to release heat to achieve separate heating of the floor heating; When executing the second heating mode, open the first expansion valve so that the refrigerant can release heat through the indoor heat exchanger to achieve separate heating of the air conditioner; When executing the third heating mode, open the first solenoid valve, the second solenoid valve, and the first expansion valve so that the refrigerant can release heat through the indoor heat exchanger and the floor heating heat exchanger respectively to achieve simultaneous heating of the air conditioner and the floor heating.

6. The control method according to claim 5, wherein The specific steps of "selectively execute one of a first heating mode, a second heating mode, or a third heating mode according to the indoor temperature and the target temperature" include: Calculate the difference between the target temperature and the indoor temperature; Compare the difference with a first preset value and a second preset value, wherein the first preset value is greater than the second preset value; Selectively execute one of the first heating mode, the second heating mode, or the third heating mode according to the comparison result.

7. The control method according to claim 6, characterized in that The specific steps of "selectively execute one of the first heating mode, the second heating mode, or the third heating mode according to the comparison result" include: If the difference is less than or equal to the second preset value, execute the first heating mode; If the difference is greater than the second preset value and less than or equal to the first preset value, execute the second heating mode; If the difference is greater than the first preset value, execute the third heating mode.

8. The control method according to claim 5, characterized in that The control method further includes: When executing the second heating mode, adjust the opening degree of the first expansion valve to the maximum opening degree; and / or When executing the third heating mode, adjust the opening degree of the first expansion valve to the maximum opening degree.

9. The control method according to any one of claims 4 to 8, characterized in that The set opening degree is greater than the minimum opening degree of the second expansion valve and less than the maximum opening degree of the second expansion valve.

10. An air conditioning device, characterized in that, The air conditioning device includes a controller configured to be able to execute the control method according to any one of claims 1 to 9.

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