Air conditioning system and control method

Abstract

The invention relates to the technical field of air conditioners, particularly provides an air conditioning system and a control method thereof, and aims to solve the problem of how to improve the heating effect of an air conditioner under the condition of not increasing power consumption. In order to achieve the purpose, a first heat exchange device in the air conditioning system is arranged on a driving mechanism, so that a first refrigerant in the first heat exchange device can exchange heat with heat generated by the driving mechanism, and then the temperature of the first refrigerant is increased. The first heat exchange device is arranged on the evaporator, 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 loop, so that a first refrigerant in the first heat exchange device can exchange heat with a first refrigerant in the second heat exchange device, the second heat exchange device can heat the evaporator, and the temperature of a second refrigerant in the evaporator is increased; and therefore, the heating effect of the air conditioner can still be ensured under the condition that the power consumption of the air conditioner is not increased.

Description

Technical Field

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

[0002] When the air conditioner is running for heating in a low temperature environment in winter, the outdoor unit will be affected by the outdoor temperature and humidity and frost will appear. The frost on the outdoor unit will affect the heating effect of the air conditioner and reduce the air outlet temperature of the indoor unit.

[0003] At present, in order to improve the air outlet effect of the indoor unit, a heating auxiliary device is added to the indoor unit to improve the heating effect of the air conditioner, so that the air outlet temperature of the indoor unit is increased, but this method will increase power consumption.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0005] In order to solve at least one problem in the prior art, that is, to solve the problem of how to improve the heating effect of an air conditioner without increasing power consumption, the present application provides an air conditioning system, the air conditioning system comprising 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. 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.

[0009] In the preferred technical solution of the above-mentioned air-conditioning system, the first heat exchange device includes a heat exchange tube arranged on the outer wall of the driving mechanism, the outlet end of the heat exchange tube is connected to the inlet end of the second heat exchange device, and the inlet end of the heat exchange tube is connected to the outlet end of the second heat exchange device.

[0010] In a preferred technical solution of the above air-conditioning system, the heat exchange tube is wound around the outer wall of the driving mechanism.

[0011] In the preferred technical solution of the above-mentioned air-conditioning system, the second heat exchange device is a tubular heat exchange device, the inlet end of the tubular heat exchange device is connected to the outlet end of the first heat exchange device, and the outlet end of the tubular heat exchange device is connected to the inlet end of the first heat exchange device.

[0012] In the preferred technical solution of the above air conditioning system, the pipeline material of the tubular heat exchanger is metal.

[0013] In the preferred technical solution of the above air conditioning system, a valve body is provided on the pipeline connecting the outlet end of the first heat exchange device and the inlet end of the second heat exchange device; and / or

[0014] A valve body is provided on the pipeline connecting the inlet end of the first heat exchange device and the outlet end of the second heat exchange device.

[0015] In the preferred technical solution of the above air conditioning system, the air conditioning system further includes an outdoor unit, the outdoor unit includes a compressor, a throttling component and a condenser, and the compressor, the evaporator, the throttling component and the condenser are connected in sequence to form a second refrigerant circuit.

[0016] In the preferred technical solution of the above air conditioning system, the valve body is a solenoid valve or an electric valve; and / or

[0017] The driving mechanism is a motor.

[0018] The present application also provides a control method for an air conditioning system, the air conditioning system being the air conditioning system described in any of the above preferred technical solutions, and the control method includes:

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

[0020] Compare the magnitude of the outdoor temperature Tao with a first preset temperature T1;

[0021] When Tao ≤ T1, control the valve body to open.

[0022] In the preferred technical solution of the above control method, the control method further includes:

[0023] When Tao > T1, compare the magnitude of the outdoor temperature Tao with a second preset temperature T2;

[0024] When T1 < Tao < T2, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm;

[0025] 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;

[0026] When Te ≤ TE1 and Tm ≤ TM, control the valve body to open.

[0027] In the preferred technical solution of the above control method, the control method further includes:

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

[0029] In the preferred technical solution of the above control method, the control method further includes:

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

[0031] When T2≤Tao≤T3, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm;

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

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

[0034] In the preferred technical solution of the above control method, the control method further includes:

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

[0036] In the preferred technical solution of the above control method, the control method further includes:

[0037] When Tao ≥ T3, obtain the external coil temperature Te and the evaporator coil temperature Tm;

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

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

[0040] In the preferred technical solution of the above control method, the control method further includes:

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

[0042] Solution 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. 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.

[0046] Option 2. An air-conditioning system according to Option 1, characterized in that the first heat exchange device includes a heat exchange tube arranged on the outer wall of the driving mechanism, the outlet end of the heat exchange tube is connected to the inlet end of the second heat exchange device, and the inlet end of the heat exchange tube is connected to the outlet end of the second heat exchange device.

[0047] Solution 3. The air conditioning system according to Solution 2 is characterized in that the heat exchange tube is wound around the outer wall of the driving mechanism.

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

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

[0050] Solution 6. The air conditioning system according to Solution 1 is characterized in that the valve body is provided on a pipeline connecting 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 provided on a pipeline connecting the inlet end of the first heat exchange device and the outlet end of the second heat exchange device.

[0052] Option 7. The air-conditioning system according to Option 1 is characterized in that the air-conditioning system also includes an outdoor unit, the outdoor unit includes a compressor, a throttling component and a condenser, and the compressor, the evaporator, the throttling component and the condenser are connected in sequence to form a second refrigerant circuit.

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

[0054] The driving mechanism is a motor.

[0055] Solution 9. A control method for an air conditioning system, wherein the air conditioning system is the air conditioning system according to any one of Solutions 1 to 8, wherein the control method comprises:

[0056] When the air conditioner is operating, obtain the outdoor temperature Tao;

[0057] Compare the magnitude of the outdoor temperature Tao with the first preset temperature T1;

[0058] When Tao ≤ T1, control the valve body to open.

[0059] Solution 10. The control method according to Solution 9, characterized in that the control method further includes:

[0060] When Tao > T1, compare the magnitude of the outdoor temperature Tao with the second preset temperature T2;

[0061] When T1 < Tao < T2, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm;

[0062] Compare the magnitude of the outdoor unit coil temperature Te with the first preset threshold TE1 and the magnitude of the evaporator coil temperature Tm with the temperature threshold TM;

[0063] When Te ≤ TE1 and Tm ≤ TM, control the valve body to open.

[0064] Solution 11. The control method according to Solution 10, characterized in that the control method further includes:

[0065] When Te > TE1 and / or Tm > TM, control the valve body to close.

[0066] Solution 12. The control method according to Solution 10, characterized in that the control method further includes:

[0067] When Tao ≥ T2, compare the magnitude of the outdoor temperature Tao with the third preset temperature T3;

[0068] When T2 ≤ Tao ≤ T3, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm;

[0069] Compare the magnitude of the outdoor unit coil temperature Te with the second preset threshold TE1 and the magnitude of the evaporator coil temperature Tm with the temperature threshold TM;

[0070] When Te ≤ TE2 and Tm ≤ TM, control the valve body to open.

[0071] Solution 13. The control method according to Solution 12, characterized in that the control method further includes:

[0072] When Te > TE2 and / or Tm > TM, control the valve body to close.

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

[0074] When Tao ≥ T3, obtain the external coil temperature Te and the evaporator coil temperature Tm;

[0075] Comparing the outdoor unit coil temperature Te with a third preset threshold TE1 and the evaporator coil temperature Tm with a temperature threshold TM;

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

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

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

[0079] It can be understood by those skilled in the art that the air conditioning system of the present application includes 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 air outlet temperature of the air conditioner, so that the heating effect of the air conditioner can be guaranteed without increasing power consumption.

[0080] Furthermore, the heat exchange device includes a heat exchange tube arranged on the outer wall of the driving mechanism, which facilitates heat exchange between the driving mechanism and the first refrigerant in the heat exchange tube, thereby increasing the temperature of the first refrigerant in the heat exchange tube and also facilitating cooling of the driving mechanism.

[0081] Furthermore, by providing a valve body on the pipeline connecting the outlet end of the first heat exchange device with the inlet end of the second heat exchange device and / or providing a valve body on the pipeline connecting the inlet end of the first heat exchange device with 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 practicality of the present application.

[0082] It can be understood by those skilled in the art that the control method of the air-conditioning system of the present application includes obtaining the outdoor temperature when the air-conditioning is running, and comparing the outdoor temperature with a first preset temperature. When the outdoor temperature is less than or equal to the first preset temperature, the control 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 then increase the air outlet temperature of the air conditioner, so that the heating effect of the air conditioner can be guaranteed without increasing power consumption.

[0083] Furthermore, when the outdoor temperature is greater than the first preset temperature, the outdoor temperature is compared with the second preset temperature. When the outdoor temperature is greater than the first preset temperature and less than the second preset temperature, the outdoor unit coil temperature and the evaporator coil temperature are obtained, and the outdoor unit coil temperature is compared with the first preset threshold value and the evaporator coil temperature is compared with the temperature threshold value. 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, the control 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 then increase the air outlet temperature of the air conditioner, so that the heating effect of the air conditioner can be guaranteed without increasing power consumption.

[0084] Furthermore, 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 are high, and the air conditioner has a good heating effect. At this time, the control 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 has a higher evaporation temperature without utilizing the heat of the driving mechanism, so that the air outlet temperature of the air conditioner is higher.

[0085] Furthermore, when the outdoor temperature is greater than or equal to the second preset temperature, the outdoor temperature is compared with the 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, the outdoor unit coil temperature and the evaporator coil temperature are obtained, and the outdoor unit coil temperature is compared with the second preset threshold value and the evaporator coil temperature is compared with the temperature threshold value. 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, the control 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 then increase the air outlet temperature of the air conditioner, so that the heating effect of the air conditioner can be guaranteed without increasing power consumption.

[0086] Furthermore, when the outdoor unit coil temperature is greater than the second 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 are high, and the air conditioner has a good heating effect. At this time, the control 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 no longer uses the heat of the driving mechanism and also has a higher temperature, so that the air outlet temperature of the air conditioner is higher.

[0087] Furthermore, when the outdoor temperature is greater than or equal to the third preset temperature, the outdoor unit coil temperature and the evaporator coil temperature are obtained, and the outdoor unit coil temperature is compared with the third preset threshold value and the evaporator coil temperature is compared with the temperature threshold value; when 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 control 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 then increase the air outlet temperature of the air conditioner, so that the heating effect of the air conditioner can be guaranteed without increasing power consumption.

[0088] Furthermore, when the outdoor unit coil temperature is greater than the third 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 are high, and the air conditioner has a good heating effect. At this time, the control 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 no longer uses the heat of the driving mechanism and also has a higher temperature, so that the air outlet temperature of the air conditioner is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

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

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

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

[0093] List of reference numerals:

[0094] 1. Evaporator; 2. Compressor; 3. Condenser; 4. Electronic expansion valve; 5. Four-way valve; 6. Motor; 7. Heat transfer pipe; 8. Copper tube heat exchanger; 9. Solenoid valve. DETAILED DESCRIPTION

[0095] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only 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 present embodiment is introduced in conjunction with the application to household air conditioners, this is not intended to limit the scope of protection of the present application. Without departing from the principles of the present application, those skilled in the art may apply the present application to other application scenarios. For example, the air-conditioning system of the present application can obviously also be applied to other types of occasions, such as RV air conditioners, etc.

[0096] It should be noted that, in the description of the present application, terms such as "upper", "lower", "inner", "bottom", "end" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the 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. Therefore, it should not be understood as a limitation on the present application.

[0097] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0098] First refer to Figure 1 , the air conditioning system of the present application is described. Among them, Figure 1 yes Figure 1 It is a flow chart of the air conditioning system of this application.

[0099] like Figure 1 As shown, in order to solve the problem of how to improve the heating effect of the air conditioner without increasing power consumption, the air conditioning system of the present application includes a driving mechanism, an evaporator 1, a first heat exchange device and a second heat exchange device. The first heat exchange device is arranged on the driving mechanism. The second heat exchange device is arranged 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 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 1 to increase the temperature of the second refrigerant in the evaporator 1.

[0100] In the present application, 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 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 air outlet temperature of the air conditioner, so that the heating effect of the air conditioner can be guaranteed without increasing power consumption.

[0101] See below for further reference Figure 1 , a preferred implementation of the air-conditioning system of the present application is introduced. Those skilled in the art will understand that the implementation described below is only used to illustrate the principle of the present application and is not intended to limit the scope of protection of the present application. On the premise that the air-conditioning system at least includes a driving mechanism, an evaporator 1, a first heat exchange device and a second heat exchange device, those skilled in the art can adjust the following settings so that the present application can be applied to more specific application scenarios.

[0102] Reference 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 an a end, a b end, a c end and a d end. The condenser 3, the compressor 2, the four-way valve 5, the expansion valve, and the evaporator 1 form a second refrigerant circuit. The flow path of the second refrigerant in the second refrigerant circuit is compressor 2 → a end of the electronic expansion valve 4 → d end of the electronic expansion valve 4 → evaporator 1 → electronic expansion valve 4 → condenser 3 → evaporator 1 → b end of the electronic expansion valve 4 → c end of the electronic expansion valve 4 → compressor 2. The refrigerant circuit can meet the heating demand of the air conditioning system.

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

[0104] See next 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 tube 7 wound on the outer wall of the motor 6, which is conducive to the first refrigerant in the heat exchange tube 7 absorbing the heat generated by the motor 6. The outlet end of the heat exchange tube 7 is connected to the inlet end of the copper tube heat exchange device, and the inlet end of the heat exchange tube 7 is connected to 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 of the copper tube heat exchange device, and then the copper tube heat exchange device can heat the evaporator 1.

[0105] Of course, the specific setting form of the second heat exchange device is not fixed in this 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 tube heat exchange device. In addition, this application has no restrictions on the material of the heat exchange tube 7, as long as the first refrigerant in the heat exchange tube 7 is conducive to absorbing the heat generated by the driving mechanism. For example, the material of the heat exchange tube 7 can be copper.

[0106] It should be noted that the present application has no limitation on the first refrigerant, as long as it is conducive to heat exchange. For example, the first refrigerant may be water.

[0107] See next Figure 1 The pipeline connecting the outlet end of the heat exchange tube 7 and the inlet end of the copper tube heat exchange device and the pipeline connecting the inlet end of the heat exchange tube 7 and the outlet end of the copper tube heat exchange device are both provided with electromagnetic valves 9. By controlling the opening of the two electromagnetic valves 9, the copper tube heat exchange device can heat the evaporator 1. When the two electromagnetic valves 9 are controlled to be closed, the copper tube heat exchanger 8 no longer heats the evaporator 1 because the heat exchange between the copper tube heat exchanger 8 and the heat exchange tube 7 is no longer performed. When the two electromagnetic valves 9 are opened, the copper tube heat exchange device can heat the evaporator 1 using the heat generated by the motor 6. When the two electromagnetic valves 9 are closed, the copper tube heat exchange device no longer heats the evaporator 1.

[0108] Of course, the specific setting form and setting number of the valve body 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 setting number of the valve body can also be 1. When the setting number of the valve body is 1, a solenoid valve 9 can be set on the pipeline connecting the outlet end of the heat exchange tube 7 and the inlet end of the copper tube heat exchange device, or on the pipeline connecting the inlet end of the heat exchange tube 7 and the outlet end of the copper tube heat exchange device.

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

[0110] The present application provides a control method for an air conditioning system, wherein the air conditioning system is an air conditioning system according to any of the above specific embodiments. The control method includes:

[0111] S101, when the air conditioner is running, obtaining the outdoor temperature Tao. For example, a temperature sensor may be provided at the air inlet of the outdoor unit, and the outdoor temperature is detected by the temperature sensor 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, compare the two by checking 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, control the valve body to open. For example, when the outdoor temperature is less than or equal to the first preset temperature, control 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, enabling the copper tube heat exchange device to heat the evaporator 1 using the heat generated by the motor 6.

[0114] During the operation of the air conditioner in this application, the outdoor temperature is obtained and compared with the first preset temperature. When the outdoor temperature is less than or equal to the first preset temperature, the valve body is controlled 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, enabling the second heat exchange device to heat the evaporator 1, increasing the temperature of the second refrigerant in the evaporator 1, and further increasing the air outlet temperature of the air conditioner, ensuring the heating effect of the air conditioner without increasing power consumption.

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

[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 outdoor unit coil temperature Te with the first preset threshold TE1 and the evaporator coil temperature Tm with the temperature threshold TM;

[0119] When Te ≤ TE1 and Tm ≤ TM, control the valve body to open.

[0120] It should be noted that the outdoor unit coil temperature can be obtained through a temperature sensor set on the outdoor unit coil, and the evaporator coil temperature can be obtained through a temperature sensor set on the coil of the evaporator 1.

[0121] For example, taking the first preset temperature T1 as -15°C, the second preset temperature T2 as -6°C, the first preset threshold TE1 as -18°C, the temperature threshold TM as 35°C, the valve body as the solenoid valve 9, the first heat exchange device as the heat exchange tube 7, and the second heat exchange device as the copper tube heat exchange device as an example for explanation. When Tao > -15°C, compare the outdoor temperature Tao with the second preset temperature T2. When -15°C < Tao < -6°C, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm, and compare the outdoor unit coil temperature Te with the first preset threshold TE1 and the evaporator coil temperature Tm with the temperature threshold TM. When Te ≤ -18°C and Tm ≤ 35°C, it indicates that the outdoor unit coil temperature and the evaporator coil temperature are relatively low. At this time, control the two solenoid valves 9 in the first refrigerant circuit 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, and further enable the first refrigerant in the heat exchange tube 7 to exchange heat with the first refrigerant in the copper tube 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 and improve the heating effect of the air conditioner.

[0122] Furthermore, the control method further includes:

[0123] When Te > TE1 and / or Tm > TM, control the valve body to close.

[0124] For example, taking the first preset threshold TE1 as -18°C, the temperature threshold TM as 35°C, the valve body as the solenoid valve 9, the first heat exchange device as the heat exchange tube 7, and the second heat exchange device as the copper tube heat exchange device as an example for explanation. When Te > -18°C and / or Tm > 35°C, at this time, the outdoor unit coil temperature and / or the evaporator coil temperature are relatively high. At this time, control the two solenoid valves 9 in the first refrigerant circuit to close, 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 can have a relatively high evaporation temperature without using the heat of the driving mechanism, making the air outlet temperature of the air conditioner relatively high.

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

[0126] When Tao ≥ T2, compare the outdoor temperature Tao with the third preset temperature T3;

[0127] When T2 ≤ Tao ≤ T3, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm;

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

[0129] When Te ≤ TE2 and Tm ≤ TM, control the valve body to open.

[0130] For example, taking the second preset temperature as -6°C, the third preset temperature as -5°C, the second preset threshold TE1 as -4°C, the temperature threshold TM as 35°C, the valve body as the solenoid valve 9, the first heat exchange device as the heat exchange pipe 7, and the second heat exchange device as the copper tube heat exchange device as an example for illustration. When Tao ≥ -6°C, compare the outdoor temperature Tao with the third preset temperature T3. When -6°C < Tao < 5°C, obtain the outdoor unit coil temperature Te and the evaporator coil temperature Tm, and compare the outdoor unit coil temperature Te with the second preset threshold TE2 and the evaporator coil temperature Tm with the temperature threshold TM. When Te ≤ -4°C and Tm ≤ 35°C, it indicates that the outdoor unit coil temperature and the evaporator coil temperature are relatively low. At this time, control the two solenoid valves 9 in the first refrigerant circuit 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, and further enable the first refrigerant in the heat exchange pipe 7 to exchange heat with the first refrigerant in the copper tube 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 and improve the heating effect of the air conditioner.

[0131] Further, the control method further includes:

[0132] When Te > TE2 and / or Tm > TM, control the valve body to close.

[0133] For example, taking the second preset threshold TE1 as -6°C, the temperature threshold TM as 35°C, the valve body as the solenoid valve 9, the first heat exchange device as the heat exchange pipe 7, and the second heat exchange device as the copper tube heat exchange device as an example for illustration. When Te > -6°C and / or Tm > 35°C, at this time, the outdoor unit coil temperature and / or the evaporator coil temperature are relatively high. At this time, control the two solenoid valves 9 in the first refrigerant circuit to close, 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 has a relatively high evaporation temperature without using the heat of the driving mechanism, making the air outlet temperature of the air conditioner relatively high.

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

[0135] When Tao ≥ T3, obtain the external coil temperature Te and the evaporator coil temperature Tm;

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

[0137] When Te ≤ TE3 and Tm ≤ TM, control the valve body to open.

[0138] For example, the third preset temperature is 5°C, the second preset threshold TE3 is 0°C, the temperature threshold TM is 35°C, the valve body is the solenoid valve 9, the first heat exchange device is the heat exchange tube 7, and the second heat exchange device is the copper tube heat exchange device. When Tao ≥ 5°C, the outdoor unit coil temperature Te and the evaporator coil temperature Tm are obtained, and the size of the outdoor unit coil temperature Te and the second preset threshold TE3 and the size of the evaporator coil temperature Tm and the temperature threshold TM are compared. When Te ≤ 0°C and Tm ≤ 35°C, it means that the outdoor unit coil temperature and the evaporator coil temperature are low. At this time, the two solenoid valves 9 in the first refrigerant circuit are controlled to open, so that the first refrigerant in the first heat exchange device can be heat-exchanged with the first refrigerant in the second heat exchange device, and then the first refrigerant in the heat exchange tube 7 can be heat-exchanged with the first refrigerant in the copper tube 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, thereby improving the heating effect of the air conditioner.

[0139] Furthermore, the control method further includes:

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

[0141] For example, the third preset threshold TE1 is 0°C, the temperature threshold TM is 35°C, the valve body is the solenoid valve 9, the first heat exchange device is the heat exchange tube 7, and the second heat exchange device is the copper tube heat exchange device. When Te>0°C and / or Tm>35°C, the outdoor unit coil temperature and / or the evaporator coil temperature are high. At this time, the two solenoid 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. The evaporator 1 has a higher evaporation temperature without using the heat of the driving mechanism, so that the air outlet temperature of the air conditioner is higher.

[0142] Combine the following Figure 3 , a possible operation process of the air-conditioning system of the present application is briefly described. Figure 3 A logic diagram of a possible implementation of the control method of the air-conditioning system of the present application.

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

[0144] S202, determine whether Tao ≤ -15°C is established. If yes, execute S203, otherwise execute S204.

[0145] S203, control the solenoid valve 9 to open.

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

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

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

[0149] S207, control the solenoid valve 9 to close.

[0150] S208, determine whether -6°C ≤ Tao ≤ 5°C holds. If it holds, execute S210. If Tao > 5°C, execute S211.

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

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

[0153] S211, obtain the external coil temperature Te and the evaporator coil temperature Tm, and then execute S212.

[0154] S212, determine whether Te ≤ 0°C and Tm ≤ 35°C hold. If it holds, execute S203. If Te > 0°C and / or Tm > 35°C, execute S207.

[0155] Those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims of this application, any one of the claimed embodiments can be used in any combination.

[0156] So far, the technical solutions of this application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of this application is obviously not limited to these specific embodiments. Without departing from the principle of this application, 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 this application.

Claims

1. An air conditioning system, characterized in that: The air conditioning system includes a driving mechanism, an evaporator, a first heat exchange device, and a second heat exchange device; The first heat exchange device is arranged on the driving mechanism; 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, 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.

2. The air conditioning system according to claim 1, characterized in that: The first heat exchange device includes a heat exchange pipe arranged 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 air conditioning system according to claim 2, characterized in that: The heat exchange pipe is wound around the outer wall of the driving mechanism.

4. The air conditioning system 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 air conditioning system according to claim 4, characterized in that: The pipe material of the tubular heat exchanger is metal.

6. The air conditioning system according to claim 1, characterized in that: The valve body is arranged 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; and / or The valve body is arranged 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.

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

8. The air conditioning system 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.

9. A control method for an air conditioning system, wherein the air conditioning system is the air conditioning system according to any one of claims 1 to 8, characterized in that: The control method includes: When the air conditioner is running, obtain the outdoor temperature Tao; Compare the magnitude of the outdoor temperature Tao and the first preset temperature T1; When Tao≤T1, control the valve body to open.

10. The control method according to claim 9, characterized in that: The control method further includes: When Tao>T1, compare the magnitude of the outdoor temperature Tao and the 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 and the first preset threshold TE1 and the magnitude of the evaporator coil temperature Tm and the temperature threshold TM; When Te≤TE1 and Tm≤TM, control the valve body to open.

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