Air conditioning system and control method

Abstract

The application relates to the air conditioning technical field, and particularly provides an air conditioning system and a control method thereof, which aims to solve the problem of how to improve the heating effect of the air conditioner without increasing the power consumption. To this end, the first heat exchange device in the air conditioning system is arranged on the driving mechanism, so that the first refrigerant in the first heat exchange device can exchange heat with the heat generated by the driving mechanism, thereby increasing the temperature of the first refrigerant. The second heat exchange device is arranged on the evaporator, the first heat exchange device and the second heat exchange device form a first refrigerant circuit, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator, the temperature of the second refrigerant in the evaporator is increased, and then the outlet air temperature of the air conditioner is increased, so that the air conditioner can still ensure the heating effect without increasing the power consumption.

Description

TECHNICAL FIELD

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

[0002] When an air conditioner operates to heat in a low-temperature environment in winter, the outdoor unit will be affected by the outdoor temperature and humidity and frost will appear, which will affect the heating effect of the air conditioner and reduce the outlet air temperature of the indoor unit.

[0003] Currently, in order to improve the outlet air effect of the indoor unit, a heating auxiliary device is added to the indoor unit to improve the heating effect of the air conditioner and increase the outlet air temperature of the indoor unit, but this way will increase the power consumption.

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

[0005] In order to solve at least one problem in the prior art, i.e., to solve the problem of how to improve the heating effect of the air conditioner without increasing power consumption, the present application provides an air conditioner system, which comprises a driving mechanism, an evaporator, a first heat exchange device and a second heat exchange device;

[0006] The first heat exchange device is arranged on the driving mechanism;

[0007] The second heat exchange device is arranged on the evaporator;

[0008] The first heat exchange device and the second heat exchange device form a first refrigerant circuit, and a valve body is arranged on the first refrigerant circuit, so that when the valve body is in an open state, the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator to increase the temperature of the second refrigerant in the evaporator.

[0009] In the preferred technical solution of the above air conditioner system, the first heat exchange device comprises a heat exchange pipe arranged on the outer wall of the driving mechanism, the outlet end of the heat exchange pipe is in communication with the inlet end of the second heat exchange device, and the inlet end of the heat exchange pipe is in communication with the outlet end of the second heat exchange device.

[0010] In the preferred technical solution of the above air conditioner system, the heat exchange pipe is wound on the outer wall of the driving mechanism.

[0011] In the preferred technical solution of the above air conditioner system, the second heat exchange device is a tubular heat exchange device, the inlet end of the tubular heat exchange device is in communication with the outlet end of the first heat exchange device, and the outlet end of the tubular heat exchange device is in communication with the inlet end of the first heat exchange device.

[0012] In the preferred technical scheme of the air conditioning system, the pipe material of the pipe heat exchanger is metal.

[0013] In the preferred technical scheme of the air conditioning system, the valve body is arranged on the pipeline through which the outlet end of the first heat exchange device and the inlet end of the second heat exchange device communicate; and / or

[0014] The valve body is arranged on the pipeline through which the inlet end of the first heat exchange device and the outlet end of the second heat exchange device communicate.

[0015] In the preferred technical scheme of the air conditioning system, the air conditioning system further comprises an outdoor unit, the outdoor unit comprises a compressor, a throttling assembly and a condenser, and the compressor, the evaporator, the throttling assembly and the condenser are sequentially connected to form a second refrigerant circuit.

[0016] In the preferred technical scheme of the air conditioning system, the valve body is an electromagnetic valve or an electric valve; and / or

[0017] The driving mechanism is an electric motor.

[0018] The application also provides a control method of an air conditioning system, the air conditioning system being the air conditioning system of any of the preferred technical schemes, and the control method comprising:

[0019] When the air conditioner is running, an outdoor temperature Tao is obtained;

[0020] The outdoor temperature Tao and a first preset temperature T1 are compared;

[0021] When Tao≤T1, the valve body is controlled to be opened.

[0022] In the preferred technical scheme of the control method, the control method further comprises:

[0023] When Tao>T1, the outdoor temperature Tao and a second preset temperature T2 are compared;

[0024] When T1<Tao<T2, an outdoor unit coil temperature Te and an evaporator coil temperature Tm are obtained;

[0025] The outdoor unit coil temperature Te and a first preset threshold TE1 are compared, and the evaporator coil temperature Tm and a temperature threshold TM are compared;

[0026] When Te≤TE1 and Tm≤TM, the valve body is controlled to be opened.

[0027] In the preferred technical scheme of the control method, the control method further comprises:

[0028] When Te>TE1 and / or Tm>TM, the valve body is controlled to be closed.

[0029] In the preferred technical scheme of the control method, the control method further comprises:

[0030] When Tao≥T2, the outdoor temperature Tao is compared with a third preset temperature T3;

[0031] When T2≤Tao≤T3, an outdoor unit coil temperature Te and an evaporator coil temperature Tm are obtained;

[0032] The outdoor unit coil temperature Te is compared with a second preset threshold TE1, and the evaporator coil temperature Tm is compared with a temperature threshold TM;

[0033] When Te≤TE2 and Tm≤TM, the valve body is controlled to be opened.

[0034] In the preferred technical scheme of the control method, the control method further comprises:

[0035] When Te>TE2 and / or Tm>TM, the valve body is controlled to be closed.

[0036] In the preferred technical scheme of the control method, the control method further comprises:

[0037] When Tao≥T3, an outdoor coil temperature Te and an evaporator coil temperature Tm are obtained;

[0038] The outdoor unit coil temperature Te is compared with a third preset threshold TE1, and the evaporator coil temperature Tm is compared with a temperature threshold TM;

[0039] When Te≤TE3 and Tm≤TM, the valve body is controlled to be opened.

[0040] In the preferred technical scheme of the control method, the control method further comprises:

[0041] When Te>TE3 and / or Tm>TM, the valve body is controlled to be closed.

[0042] Scheme 1. An air conditioning system, characterized in that the air conditioning system comprises a driving mechanism, an evaporator, a first heat exchange device and a second heat exchange device;

[0043] The first heat exchange device is arranged on the driving mechanism;

[0044] The second heat exchange device is arranged on the evaporator;

[0045] The first heat exchange device and the second heat exchange device form a first refrigerant circuit, and a valve body is arranged on the first refrigerant circuit, so that when the valve body is in an open state, the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator to increase the temperature of the second refrigerant in the evaporator.

[0046] Scheme 2. The air conditioning system according to scheme 1, characterized in that the first heat exchange device comprises a heat exchange pipe arranged on the outer wall of the driving mechanism, the outlet end of the heat exchange pipe is in communication with the inlet end of the second heat exchange device, and the inlet end of the heat exchange pipe is in communication with the outlet end of the second heat exchange device.

[0047] Scheme 3. The air conditioning system according to scheme 2, characterized in that the heat exchange pipe is wound on the outer wall of the driving mechanism.

[0048] Scheme 4. The air conditioning system according to scheme 1, characterized in that the second heat exchange device is a tubular heat exchange device, the inlet end of the tubular heat exchange device is in communication with the outlet end of the first heat exchange device, and the outlet end of the tubular heat exchange device is in communication with the inlet end of the first heat exchange device.

[0049] Scheme 5. The air conditioning system according to scheme 4, characterized in that the pipe material of the tubular heat exchanger is metal.

[0050] Scheme 6. The air conditioning system according to scheme 1, characterized in that a valve body is arranged on the pipeline in communication between the outlet end of the first heat exchange device and the inlet end of the second heat exchange device; and / or

[0051] A valve body is arranged on the pipeline in communication between the inlet end of the first heat exchange device and the outlet end of the second heat exchange device.

[0052] Scheme 7. The air conditioning system according to scheme 1, characterized in that the air conditioning system further comprises an outdoor unit, the outdoor unit comprises a compressor, a throttling assembly and a condenser, and the compressor, the evaporator, the throttling assembly and the condenser are connected in sequence to form a second refrigerant circuit.

[0053] Scheme 8. The air conditioning system according to scheme 1, characterized in that the valve body is an electromagnetic valve or an electric valve; and / or

[0054] The driving mechanism is an electric motor.

[0055] Scheme 9. A control method of an air conditioning system, the air conditioning system being any one of the air conditioning systems according to schemes 1-8, characterized in that the control method comprises:

[0056] When the air conditioner is running, an outdoor temperature Tao is obtained;

[0057] A comparison is made between the outdoor temperature Tao and a first preset temperature T1;

[0058] When Tao≤T1, the valve body is controlled to be opened.

[0059] Scheme 10. The control method according to scheme 9, characterized in that the control method further comprises:

[0060] When Tao>T1, a comparison is made between the outdoor temperature Tao and a second preset temperature T2;

[0061] When T1<Tao<T2, an outdoor unit coil temperature Te and an evaporator coil temperature Tm are obtained;

[0062] A comparison is made between the outdoor unit coil temperature Te and a first preset threshold TE1 and between the evaporator coil temperature Tm and a temperature threshold TM;

[0063] When Te≤TE1 and Tm≤TM, the valve body is controlled to be opened.

[0064] Scheme 11. The control method according to scheme 10, characterized in that the control method further comprises:

[0065] When Te>TE1 and / or Tm>TM, the valve body is controlled to be closed.

[0066] Scheme 12. The control method according to scheme 10, characterized in that the control method further comprises:

[0067] When Tao≥T2, a comparison is made between the outdoor temperature Tao and a third preset temperature T3;

[0068] When T2≤Tao≤T3, an outdoor unit coil temperature Te and an evaporator coil temperature Tm are obtained;

[0069] A comparison is made between the outdoor unit coil temperature Te and a second preset threshold TE1 and between the evaporator coil temperature Tm and a temperature threshold TM;

[0070] When Te≤TE2 and Tm≤TM, the valve body is controlled to be opened.

[0071] Scheme 13. The control method according to scheme 12, characterized in that the control method further comprises:

[0072] When Te>TE2 and / or Tm>TM, the valve body is controlled to be closed.

[0073] Scheme 14. The control method according to scheme 12, characterized in that the control method further comprises:

[0074] When Tao≥T3, the outdoor coil temperature Te and the evaporator coil temperature Tm are obtained;

[0075] The outdoor coil temperature Te and the third preset threshold TE1 are compared, and the evaporator coil temperature Tm and the temperature threshold TM are compared;

[0076] When Te≤TE3 and Tm≤TM, the valve body is controlled to be opened.

[0077] Scheme 15. The control method according to scheme 14, characterized in that the control method further comprises:

[0078] When Te>TE3 and / or Tm>TM, the valve body is controlled to be closed.

[0079] The skilled in the art can understand that the air conditioning system of the present application comprises a driving mechanism, an evaporator, a first heat exchange device and a second heat exchange device, wherein the first heat exchange device is arranged on the driving mechanism, so that the first refrigerant in the first heat exchange device can exchange heat with the heat generated by the driving mechanism, thereby increasing the temperature of the first refrigerant. The second heat exchange device is arranged on the evaporator, and the first heat exchange device and the second heat exchange device form a first refrigerant circuit, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator, increase the temperature of the second refrigerant in the evaporator, and then increase the outlet air temperature of the air conditioner, so that the air conditioner can still ensure the heating effect of the air conditioner without increasing the power consumption.

[0080] Further, the heat exchange device comprises a heat exchange pipe arranged on the outer wall of the driving mechanism, which is beneficial to heat exchange between the driving mechanism and the first refrigerant in the heat exchange pipe, thereby increasing the temperature of the first refrigerant in the heat exchange pipe, and also beneficial to cooling the driving mechanism.

[0081] Further, by arranging a valve body on the pipeline communicating between the outlet end of the first heat exchange device and the inlet end of the second heat exchange device and / or arranging a valve body on the pipeline communicating between the inlet end of the first heat exchange device and the outlet end of the second heat exchange device, the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, thereby improving the practicability of the present application.

[0082] The skilled in the art can understand that the control method of the air conditioning system of the application comprises: when the air conditioner is running, acquiring an outdoor temperature, comparing the outdoor temperature with a first preset temperature, and when the outdoor temperature is less than or equal to the first preset temperature, controlling the valve body to open, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator, increase the second refrigerant temperature in the evaporator, and further increase the air outlet temperature of the air conditioner, so that the air conditioner can still ensure the heating effect without increasing the power consumption.

[0083] Further, when the outdoor temperature is greater than the first preset temperature, comparing the outdoor temperature with a second preset temperature, and when the outdoor temperature is greater than the first preset temperature and less than the second preset temperature, acquiring an outdoor unit coil temperature and an evaporator coil temperature, comparing the outdoor unit coil temperature with a first preset threshold value and the evaporator coil temperature with a temperature threshold value, and when the outdoor unit coil temperature is less than or equal to the first preset threshold value and the evaporator coil temperature is less than or equal to the temperature threshold value, controlling the valve body to open, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator, increase the second refrigerant temperature in the evaporator, and further increase the air outlet temperature of the air conditioner, so that the air conditioner can still ensure the heating effect without increasing the power consumption.

[0084] Further, when the outdoor unit coil temperature is greater than the first preset threshold value and / or the evaporator coil temperature is greater than the temperature threshold value, the outdoor unit coil temperature and / or the evaporator coil temperature is high, and the air conditioner has a good heating effect, at this time, the valve body is controlled to be closed, so that the first refrigerant in the first heat exchange device does not exchange heat with the first refrigerant in the second heat exchange device, and the evaporator also has a high evaporation temperature without using the heat of the driving mechanism, so that the air outlet temperature of the air conditioner is high.

[0085] Further, when the outdoor temperature is greater than or equal to the second preset temperature, comparing the outdoor temperature with a third preset temperature, and when the outdoor temperature is greater than or equal to the second preset temperature and less than the third preset temperature, acquiring an outdoor unit coil temperature and an evaporator coil temperature, comparing the outdoor unit coil temperature with a second preset threshold value and the evaporator coil temperature with a temperature threshold value, and when the outdoor unit coil temperature is less than or equal to the second preset threshold value and the evaporator coil temperature is less than or equal to the temperature threshold value, controlling the valve body to open, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator, increase the second refrigerant temperature in the evaporator, and further increase the air outlet temperature of the air conditioner, so that the air conditioner can still ensure the heating effect without increasing the power consumption.

[0086] Further, in the case that the outdoor unit coil temperature is greater than a second preset threshold value, and / or the evaporator coil temperature is greater than a temperature threshold value, the outdoor unit coil temperature and / or the evaporator coil temperature is high, and the air conditioner has a good heating effect, at this time, the valve body is closed, so that the first refrigerant in the first heat exchange device and the first refrigerant in the second heat exchange device do not exchange heat, and the evaporator also has a high temperature by using the heat of the driving mechanism, so that the air outlet temperature of the air conditioner is high.

[0087] Further, in the case that the outdoor temperature is greater than or equal to a third preset temperature, the outdoor unit coil temperature and the evaporator coil temperature are obtained, and the outdoor unit coil temperature and the third preset threshold value are compared, and the evaporator coil temperature and the temperature threshold value are compared, in the case that the outdoor unit coil temperature is less than or equal to the third preset threshold value, and the evaporator coil temperature is less than or equal to the temperature threshold value, the valve body is opened, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator, increase the temperature of the second refrigerant in the evaporator, and further increase the air outlet temperature of the air conditioner, so that the air conditioner can still ensure the heating effect without increasing the power consumption.

[0088] Further, in the case that the outdoor unit coil temperature is greater than a second preset threshold value, and / or the evaporator coil temperature is greater than a temperature threshold value, the outdoor unit coil temperature and / or the evaporator coil temperature is high, and the air conditioner has a good heating effect, at this time, the valve body is closed, so that the first refrigerant in the first heat exchange device and the first refrigerant in the second heat exchange device do not exchange heat, and the evaporator also has a high temperature by using the heat of the driving mechanism, so that the air outlet temperature of the air conditioner is high. BRIEF DESCRIPTION OF DRAWINGS

[0089] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0090] Figure 1 is a flow chart of the air conditioning system of the present application;

[0091] Figure 2 is a flow chart of the control method of the air conditioning system of the present application;

[0092] Figure 3 is a logic diagram of a possible embodiment of the control method of the air conditioning system of the present application.

[0093] List of reference signs:

[0094] 1, evaporator; 2, compressor; 3, condenser; 4, electronic expansion valve; 5, four-way valve; 6, motor; 7, heat conducting pipe; 8, copper pipe heat exchanger; 9, electromagnetic valve. DETAILED DESCRIPTION

[0095] 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 merely used to explain the technical principles of the present application, and are not intended to limit the scope of protection of the present application. For example, although the embodiments are introduced in combination with the air conditioner suitable for household use, this is not intended to limit the scope of protection of the present application, and those skilled in the art can apply the present application to other application scenarios without departing from the principles of the present application. For example, the air conditioner system of the present application can obviously be applied to other types of occasions, such as air conditioners suitable for motor homes, etc.

[0096] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship of "upper", "lower", "inner", "bottom", "end" and the like are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0097] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "provided", "connected", "communicated" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or directly connected, or indirectly connected through an intermediate medium, or communicated inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0098] First, refer to Figure 1 The air conditioner system of the present application is described. Among them, Figure 1 is Figure 1 is a flow chart of the air conditioner system of the present application.

[0099] As Figure 1 shown, in order to solve the problem of how to improve the heating effect of the air conditioner without increasing the power consumption, the air conditioner system of the present application comprises a driving mechanism, an evaporator 1, a first heat exchange device and a second heat exchange device. The first heat exchange device is provided on the driving mechanism. The second heat exchange device is provided on the evaporator 1. The first heat exchange device and the second heat exchange device form a first refrigerant circuit, and a valve body is provided on the first refrigerant circuit, so that when the valve body is in an open state, the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator 1 to improve the temperature of the second refrigerant in the evaporator 1.

[0100] The first heat exchange device in the application is arranged on the driving mechanism, so that the first refrigerant in the first heat exchange device can exchange heat with the heat generated by the driving mechanism, thereby increasing the temperature of the first refrigerant. The second heat exchange device is arranged on the evaporator 1, and the first heat exchange device and the second heat exchange device form a first refrigerant circuit, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator 1, increase the temperature of the second refrigerant in the evaporator 1, and then increase the outlet air temperature of the air conditioner, so that the air conditioner can still ensure the heating effect of the air conditioner without increasing the power consumption.

[0101] Further reference will be made below Figure 1 , a preferred embodiment of the air conditioning system of the application is introduced. Those skilled in the art can understand that the following embodiments are only used to illustrate the principles of the application, and are not intended to limit the protection scope of the application. Under the premise of meeting the air conditioning system at least including driving mechanism, evaporator 1, first heat exchange device and second heat exchange device, those skilled in the art can adjust the following arrangement to adapt the application to more specific application scenarios.

[0102] Reference is made to Figure 1 , the air conditioning system includes an outdoor unit and an indoor unit, the outdoor unit includes a compressor 2, a four-way valve 5, a condenser 3 and an expansion valve. The indoor unit includes an evaporator 1. Among them, the four-way valve 5 has a, b, c and d ends. The condenser 3, the compressor 2, the four-way valve 5, the expansion valve, the evaporator 1 form a second refrigerant circuit, and the flow path of the second refrigerant in the second refrigerant circuit is compressor 2→a end of electronic expansion valve 4→d end of electronic expansion valve 4→evaporator 1→electronic expansion valve 4→condenser 3→evaporator 1→b end of electronic expansion valve 4→c end of electronic expansion valve 4→compressor 2, which can meet the heating demand of the air conditioning system.

[0103] In addition, the application has no limitation on the second refrigerant, as long as it is conducive to heat exchange. For example, the second refrigerant can be freon.

[0104] Next, see Figure 1 , the second heat exchange device is a tubular heat exchange device, and is a copper tube heat exchange device, which is conducive to heating the evaporator 1. The first heat exchange device includes a heat exchange pipe 7 wound on the outer wall of the motor 6, which is conducive to the first refrigerant in the heat exchange pipe 7 absorbing the heat generated by the motor 6. The outlet end of the heat exchange pipe 7 is in communication with the inlet end of the copper tube heat exchange device, and the inlet end of the heat exchange pipe 7 is in communication with the outlet end of the copper tube heat exchange device, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the copper tube heat exchange device, thereby enabling the copper tube heat exchange device to heat the evaporator 1.

[0105] Of course, the specific form of the second heat exchange device is not fixed in the present application, and those skilled in the art can adjust it according to the setting needs. For example, the second heat exchange device can also be an aluminum pipe heat exchange device. In addition, the material of the heat exchange pipe 7 is not limited in the present application, as long as the first refrigerant in the heat exchange pipe 7 is beneficial to absorb the heat generated by the driving mechanism. For example, the material of the heat exchange pipe 7 can be copper.

[0106] It should be noted that the first refrigerant is not limited in the present application, as long as it is beneficial for heat exchange. For example, the first refrigerant can be water.

[0107] Next, referring to Figure 1 , the outlet end of the heat exchange pipe 7 and the inlet end of the copper pipe heat exchange device are connected by a pipeline, and the inlet end of the heat exchange pipe 7 and the outlet end of the copper pipe heat exchange device are connected by a pipeline. The pipeline is provided with an electromagnetic valve 9. By controlling the opening of the two electromagnetic valves 9, the copper pipe heat exchange device can heat the evaporator 1. When the two electromagnetic valves 9 are closed, the copper pipe heat exchanger 8 no longer exchanges heat with the heat exchange pipe 7, and the copper pipe heat exchanger 8 no longer heats the evaporator 1. When the two electromagnetic valves 9 are opened, the copper pipe heat exchange device can use the heat generated by the motor 6 to heat the evaporator 1. When the two electromagnetic valves 9 are closed, the copper pipe heat exchange device does not heat the evaporator 1.

[0108] Of course, the specific form of the valve body and the number of valve bodies are not fixed in the present application, and those skilled in the art can adjust them according to the setting needs. For example, the valve body can also be an electric valve. And / or, the number of valve bodies can also be 1. When the number of valve bodies is 1, an electromagnetic valve 9 can be arranged on the pipeline connecting the outlet end of the heat exchange pipe 7 and the inlet end of the copper pipe heat exchange device, or the pipeline connecting the inlet end of the heat exchange pipe 7 and the outlet end of the copper pipe heat exchange device.

[0109] Next, the control method of the air conditioning system of the present application is introduced. Among them, Figure 2 is the flow chart of the control method of the air conditioning system of the present application.

[0110] The present application provides a control method of an air conditioning system, which is the air conditioning system of any of the specific embodiments described above. The control method comprises:

[0111] S101, when the air conditioner is running, the outdoor temperature Tao is obtained. For example, a temperature sensor can be arranged at the inlet of the outdoor unit, and the outdoor temperature is detected by the temperature sensor, so as to obtain the outdoor temperature.

[0112] S102, compare the outdoor temperature Tao with the first preset temperature T1. For example, after obtaining the outdoor temperature, the size of the outdoor temperature and the first preset temperature is compared by comparing whether the difference between the outdoor temperature and the first preset temperature is greater than 0, or whether the ratio between the two is greater than 1.

[0113] S103, when Tao≤T1, the control valve is opened. For example, when the outdoor temperature is less than or equal to the first preset temperature, the control valve is opened, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the copper tube heat exchange device can use the heat generated by the motor 6 to heat the evaporator 1.

[0114] The present application obtains the outdoor temperature when the air conditioner is running, and compares the size of the outdoor temperature and the first preset temperature. When the outdoor temperature is less than or equal to the first preset temperature, the control valve is opened, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator 1, improve the temperature of the second refrigerant in the evaporator 1, and then improve the air outlet temperature of the air conditioner, so that the air conditioner can still ensure the heating effect of the air conditioner without increasing the power consumption.

[0115] In a specific embodiment, the control method further comprises:

[0116] When Tao>T1, compare the outdoor temperature Tao with the second preset temperature T2;

[0117] When T1<Tao<T2, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm;

[0118] Compare the size of the outdoor unit coil temperature Te and the first preset threshold TE1, and the size of the evaporator coil temperature Tm and the temperature threshold TM;

[0119] When Te≤TE1 and Tm≤TM, the control valve is opened.

[0120] It should be noted that the outdoor unit coil temperature can be obtained by the temperature sensor arranged on the outdoor unit coil, and the evaporator coil temperature can be obtained by the temperature sensor arranged on the evaporator 1 coil.

[0121] For example, the first preset temperature T1 is -15°C, the second preset temperature T2 is -6°C, the first preset threshold TE1 is -18°C, the temperature threshold TM is 35°C, the valve body is the electromagnetic valve 9, the first heat exchange device is the heat exchange pipe 7, and the second heat exchange device is the copper pipe heat exchange device. When Tao is greater than -15°C, the outdoor temperature Tao is compared with the second preset temperature T2. When -15°C is less than Tao and Tao is less than -6°C, the outdoor unit coil temperature Te and the evaporator coil temperature Tm are obtained, and the outdoor unit coil temperature Te is compared with the first preset threshold TE1 and the evaporator coil temperature Tm is compared with the temperature threshold TM. When Te is less than or equal to -18°C and Tm is less than or equal to 35°C, the outdoor unit coil temperature and the evaporator coil temperature are low, and at this time, the two electromagnetic valves 9 in the first refrigerant circuit are controlled to be opened, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, and then the first refrigerant in the heat exchange pipe 7 can exchange heat with the first refrigerant in the copper pipe heat exchange device, so that the copper pipe heat exchange device can heat the evaporator 1 by using the heat generated by the motor 6, and the heating effect of the air conditioner is improved.

[0122] Further, the control method further comprises:

[0123] When Te is greater than TE1 and / or Tm is greater than TM, the valve body is controlled to be closed.

[0124] For example, the first preset threshold TE1 is -18°C, the temperature threshold TM is 35°C, the valve body is the electromagnetic valve 9, the first heat exchange device is the heat exchange pipe 7, and the second heat exchange device is the copper pipe heat exchange device. When Te is greater than -18°C and / or Tm is greater than 35°C, at this time, the outdoor unit coil temperature and the evaporator coil temperature are high, and at this time, the two electromagnetic valves 9 in the first refrigerant circuit are controlled to be closed, so that the first refrigerant in the first heat exchange device can no longer exchange heat with the first refrigerant in the second heat exchange device, and the evaporator 1 also has a high evaporation temperature without using the heat of the driving mechanism, so that the air outlet temperature of the air conditioner is high.

[0125] In a specific embodiment, the control method further comprises:

[0126] When Tao is greater than or equal to T2, the outdoor temperature Tao is compared with the third preset temperature T3;

[0127] When T2 is less than or equal to Tao and Tao is less than or equal to T3, the outdoor unit coil temperature Te and the evaporator coil temperature Tm are obtained;

[0128] The outdoor unit coil temperature Te is compared with the second preset threshold TE1 and the evaporator coil temperature Tm is compared with the temperature threshold TM;

[0129] When Te is less than or equal to TE2 and Tm is less than or equal to TM, the valve body is controlled to be opened.

[0130] For example, the second preset temperature is -6℃, the third preset temperature is -5℃, the second preset threshold TE1 is -4℃, the temperature threshold TM is 35℃, the valve body is the electromagnetic valve 9, the first heat exchange device is the heat exchange pipe 7, and the second heat exchange device is the copper pipe heat exchange device. When Tao≥-6℃, the outdoor temperature Tao is compared with the third preset temperature T3. When -6℃<Tao<5℃, the outdoor unit coil temperature Te and the evaporator coil temperature Tm are obtained, and the outdoor unit coil temperature Te is compared with the second preset threshold TE2 and the evaporator coil temperature Tm is compared with the temperature threshold TM. When Te≤-4℃ and Tm≤35℃, it indicates that the outdoor unit coil temperature and the evaporator coil temperature are low, at this time, the two electromagnetic valves 9 in the first refrigerant circuit are controlled to be opened, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, and then the first refrigerant in the heat exchange pipe 7 can exchange heat with the first refrigerant in the copper pipe heat exchange device, so that the copper pipe heat exchange device can heat the evaporator 1 by using the heat generated by the motor 6, and improve the heating effect of the air conditioner.

[0131] Further, the control method further comprises:

[0132] When Te>TE2 and / or Tm>TM, the valve body is controlled to be closed.

[0133] For example, the second preset threshold TE1 is -6℃, the temperature threshold TM is 35℃, the valve body is the electromagnetic valve 9, the first heat exchange device is the heat exchange pipe 7, and the second heat exchange device is the copper pipe heat exchange device. When Te>-6℃ and / or Tm>35℃, at this time, the outdoor unit coil temperature and the evaporator coil temperature are high, at this time, the two electromagnetic valves 9 in the first refrigerant circuit are controlled to be closed, so that the first refrigerant in the first heat exchange device can no longer exchange heat with the first refrigerant in the second heat exchange device, and the evaporator 1 also has a high evaporation temperature without using the heat of the driving mechanism, so that the air conditioner has a higher air outlet temperature.

[0134] In a specific embodiment, the control method further comprises:

[0135] When Tao≥T3, the outdoor coil temperature Te and the evaporator coil temperature Tm are obtained;

[0136] The outdoor unit coil temperature Te is compared with the third preset threshold TE1 and the evaporator coil temperature Tm is compared with the temperature threshold TM;

[0137] When Te≤TE3 and Tm≤TM, the valve body is controlled to be opened.

[0138] For example, the third preset temperature is 5℃, the second preset threshold TE3 is 0℃, the temperature threshold TM is 35℃, the valve body is the electromagnetic valve 9, the first heat exchange device is the heat exchange pipe 7, and the second heat exchange device is the copper pipe heat exchange device. When Tao≥5℃, the outdoor unit coil temperature Te and the evaporator coil temperature Tm are obtained, and the outdoor unit coil temperature Te and the second preset threshold TE3 are compared, and the evaporator coil temperature Tm and the temperature threshold TM are compared. When Te≤0℃ and Tm≤35℃, it is indicated that the outdoor unit coil temperature and the evaporator coil temperature are low, at this time, the two electromagnetic valves 9 in the first refrigerant circuit are controlled to be opened, so that the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, and then the first refrigerant in the heat exchange pipe 7 can exchange heat with the first refrigerant in the copper pipe heat exchange device, so that the copper pipe heat exchange device can heat the evaporator 1 by using the heat generated by the motor 6, and the heating effect of the air conditioner is improved.

[0139] Further, the control method further comprises:

[0140] When Te>TE3 and / or Tm>TM, the valve body is controlled to be closed.

[0141] For example, the third preset threshold TE1 is 0℃, the temperature threshold TM is 35℃, the valve body is the electromagnetic valve 9, the first heat exchange device is the heat exchange pipe 7, and the second heat exchange device is the copper pipe heat exchange device. When Te>0℃ and / or Tm>35℃, at this time, the outdoor unit coil temperature and the evaporator coil temperature are high, at this time, the two electromagnetic valves 9 in the first refrigerant circuit are controlled to be closed, so that the first refrigerant in the first heat exchange device can no longer exchange heat with the first refrigerant in the second heat exchange device, and the evaporator 1 also has a high evaporation temperature without using the heat of the driving mechanism, so that the air outlet temperature of the air conditioner is high.

[0142] The following will be described in combination with Figure 3 A possible operation process of the air conditioning system of the present application will be briefly described. Figure 3 A possible implementation of the control method of the air conditioning system of the present application.

[0143] S201, when the air conditioner is running, the outdoor temperature Tao is obtained, and then S202 is executed.

[0144] S202, it is judged whether Tao≤-15℃ is established. If it is established, S203 is executed, otherwise S204 is executed.

[0145] S203, the electromagnetic valve 9 is controlled to be opened.

[0146] S204, determine whether -15°C < Tao < -6°C is true. If true, execute S205, if Tao≥ -6°C, execute S208.

[0147] S205, acquire the outdoor unit coil temperature Te and the evaporator coil temperature Tm, then execute S206.

[0148] S206, determine whether Te≤ -18°C and Tm≤ 35°C is true. If true, execute S203, if Te > -18°C and / or Tm > 35°C, execute S207.

[0149] S207, control the electromagnetic valve 9 to be closed.

[0150] S208, determine whether -6°C < Tao < 5°C is true. If true, execute S210, if Tao > 5°C, execute S211.

[0151] S209, acquire the outdoor unit coil temperature Te and the evaporator coil temperature Tm, then execute S210.

[0152] S210, determine whether Te≤ -4°C and Tm≤ 35°C is true. If true, execute S203, if Te > -4°C and / or Tm > 35°C, execute S207.

[0153] S211, acquire the outdoor unit coil temperature Te and the evaporator coil temperature Tm, then execute S212.

[0154] S212, determine whether Te≤ 0°C and Tm≤ 35°C is true. If true, execute S203, if Te > 0°C and / or Tm > 35°C, execute S207.

[0155] Those skilled in the art will understand that the combination of features of different embodiments means to be within the scope of the present application and form different embodiments, although some embodiments described herein include certain features but not others included in other embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0156] 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 will 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 these changes or replacements will fall within the protection scope of the present application.

Claims

1. A control method for an air conditioning system, the air conditioning system including a driving mechanism, an evaporator, a first heat exchange device and a second heat exchange device; the first heat exchange device is disposed on the driving mechanism; the second heat exchange device is disposed on the evaporator; the first heat exchange device and the second heat exchange device form a first refrigerant circuit, and a valve body is provided on the pipeline where the outlet end of the first heat exchange device is communicated with the inlet end of the second heat exchange device or on the pipeline where the inlet end of the first heat exchange device is communicated with the outlet end of the second heat exchange device; a valve body is provided on the first refrigerant circuit so that when the valve body is in an open state, the first refrigerant in the first heat exchange device can exchange heat with the first refrigerant in the second heat exchange device, so that the second heat exchange device can heat the evaporator to increase the temperature of the second refrigerant in the evaporator; the control method includes: When the air conditioner is operating, obtain the outdoor temperature Tao; Compare the magnitude of the outdoor temperature Tao with a first preset temperature T1; When Tao≤T1, control the valve body to open; When Tao>T1, compare the magnitude of the outdoor temperature Tao with a second preset temperature T2; When T1<Tao<T2, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm; Compare the magnitude of the outdoor unit coil temperature Te with a first preset threshold TE1 and the magnitude of the evaporator coil temperature Tm with a temperature threshold TM; When Te≤TE1 and Tm≤TM, control the valve body to open.

2. The control method according to claim 1, characterized in that, The first heat exchange device includes a heat exchange pipe disposed on the outer wall of the driving mechanism, the outlet end of the heat exchange pipe is communicated with the inlet end of the second heat exchange device, and the inlet end of the heat exchange pipe is communicated with the outlet end of the second heat exchange device.

3. The control method according to claim 2, characterized in that, The heat exchange pipe is wound around the outer wall of the driving mechanism.

4. The control method according to claim 1, characterized in that, The second heat exchange device is a tubular heat exchange device, the inlet end of the tubular heat exchange device is communicated with the outlet end of the first heat exchange device, and the outlet end of the tubular heat exchange device is communicated with the inlet end of the first heat exchange device.

5. The control method according to claim 4, characterized in that, The pipeline material of the tubular heat exchange device is metal.

6. The control method according to claim 1, characterized in that, The air conditioning system further includes an outdoor unit, the outdoor unit including a compressor, a throttling component and a condenser, and the compressor, the evaporator, the throttling component and the condenser are sequentially connected to form a second refrigerant circuit.

7. The control method according to claim 1, characterized in that, The valve body is a solenoid valve or an electric valve; and / or The driving mechanism is a motor.

8. The control method according to claim 1, characterized in that, The control method further includes: When Te>TE1 and / or Tm>TM, control the valve body to close.

9. The control method according to claim 1, characterized in that, The control method further includes: When Tao≥T2, compare the magnitude of the outdoor temperature Tao with a third preset temperature T3; When T2≤Tao≤T3, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm; Compare the magnitude of the outdoor unit coil temperature Te with a second preset threshold TE2 and the magnitude of the evaporator coil temperature Tm with a temperature threshold TM; When Te≤TE2 and Tm≤TM, control the valve body to open.

10. The control method according to claim 9, characterized in that, The control method further includes: When Te>TE2 and / or Tm>TM, the valve body is controlled to close.

11. The control method according to claim 9, characterized in that, The control method further includes: When Tao≥T3, obtain the external coil temperature Te and the evaporator coil temperature Tm; Compare the outdoor unit coil temperature Te with the third preset threshold TE3 and the evaporator coil temperature Tm with the temperature threshold TM; When Te≤TE3 and Tm≤TM, the valve body is controlled to open.

12. The control method according to claim 11, characterized in that, The control method further includes: When Te>TE3 and / or Tm>TM, the valve body is controlled to close.

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