Air conditioning system and control method thereof

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 ensure the heating effect of an air conditioner under the condition of frequency reduction operation of the air conditioner. In order to achieve the purpose, a phase change material, a heat storage channel and a heat exchange channel are arranged in a heat storage device in the air conditioning system, the heat storage channel and the heat exchange channel do not communicate with each other, and the heat storage channel and the heat exchange device form a heat storage loop, so that a first refrigerant in the heat exchange device can exchange heat with a first refrigerant in the heat storage channel; and heat generated by the driving mechanism can be stored in the phase change material. The two ends of the heat exchange channel are arranged on the inlet side of the evaporator, so that a heat exchange branch is formed, a second refrigerant enters the heat exchange branch before entering the evaporator, the second refrigerant in the heat exchange branch can absorb heat released by the phase change material, the temperature of the second refrigerant is increased, the evaporation temperature of the evaporator can be increased, and the heat exchange efficiency of the evaporator is improved. And the heating effect of the air conditioner can still be ensured under the condition that the air conditioner runs under the reduced frequency.

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 thereof. Background Art

[0002] When the air conditioner is running in heating mode, when the indoor temperature is close to the set temperature, the air conditioner will reduce the frequency of operation, thereby achieving the purpose of reducing consumption and energy saving. However, after the air conditioner reduces the frequency, the heating effect of the air conditioner is reduced, which makes the air outlet temperature of the indoor unit lower, affecting the user experience.

[0003] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0004] In order to solve at least one problem in the prior art, that is, to solve the problem of how to ensure the heating effect of an air conditioner when the air conditioner is running at a reduced frequency, the present application provides an air conditioning system, the air conditioning system comprising an evaporator, a driving mechanism, a heat exchange device, a heat storage device and a first valve body;

[0005] The heat exchange device is arranged on the driving mechanism;

[0006] The heat storage device comprises a device body, in which a phase change material and a heat storage channel and a heat exchange channel which are not connected to each other are arranged, the heat storage channel and the heat exchange device form a heat storage circuit, and a second valve body is arranged on the heat storage circuit, so that when the second valve body is in an open state, the first refrigerant in the heat exchange device can exchange heat with the first refrigerant in the heat storage channel, so that heat is stored in the phase change material;

[0007] Both ends of the heat exchange channel are arranged on the inlet side of the evaporator to form a heat exchange branch;

[0008] The first valve body is configured to change the flow path of the second refrigerant flowing into the evaporator, so that when the second refrigerant flows into the heat exchange branch, the heat stored in the phase change material can exchange heat with the second refrigerant in the heat exchange channel.

[0009] In a preferred technical solution of the above air-conditioning system, the outer sides of the heat storage channel and the heat exchange channel are filled with the phase change material.

[0010] In a preferred technical solution of the above air-conditioning system, the heat storage channel and the heat exchange channel are in a double helix structure.

[0011] In the preferred technical solution of the above air conditioning system, the outer side of the device body is wrapped with a heat-insulating material; and / or

[0012] A heat-conducting material is arranged on the inner side of the device body.

[0013] In the preferred technical solution of the above-mentioned air-conditioning system, the heat exchange device includes a heat exchange tube arranged on the outer wall of the driving mechanism, the first end of the heat exchange tube is connected to the first end of the heat storage channel, and the second end of the heat exchange tube is connected to the second end of the heat storage channel.

[0014] 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.

[0015] In a preferred technical solution of the above air-conditioning system, the first valve body is arranged at the inlet side of the evaporator, the inlet side of the first valve body is connected to the first end of the heat exchange branch, and the outlet side of the first valve body is connected to the second end of the heat exchange branch; and / or

[0016] The first valve body is arranged on the heat exchange branch.

[0017] In the preferred technical solution of the above air-conditioning system, the air-conditioning system further includes a compressor, a throttling device and a condenser, and the compressor, the evaporator, the throttling device and the condenser are sequentially connected to form a refrigerant circuit.

[0018] In the preferred technical solution of the above air conditioning system, the first valve body is a first solenoid valve or a first electric valve; and / or

[0019] The second valve body is a second solenoid valve or a second electric valve; and / or

[0020] The driving mechanism is a motor.

[0021] The present application also provides a control method for an air-conditioning system, wherein the air-conditioning system is the air-conditioning system described in any of the above preferred technical solutions, and wherein the control method comprises:

[0022] When the air conditioner is running, the evaporator coil temperature Tm is obtained;

[0023] Comparing the evaporator coil temperature Tm with the first preset temperature T1;

[0024] According to the comparison result, the second valve body and the first valve body are selectively controlled to open.

[0025] In the preferred technical solution of the control method of the air conditioning system, when the first valve body is arranged at the inlet side of the evaporator, the step of "selectively controlling the second valve body and the first valve body to open according to the comparison result" specifically includes:

[0026] When Tm≤T1, the first valve body is controlled to be closed, and the second valve body is controlled to be opened;

[0027] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0028] When T1<Tm≤T2, the first valve body and the second valve body are controlled to open;

[0029] When Tm>T2, the first valve body is controlled to be opened and the second valve body is controlled to be closed.

[0030] In the preferred technical solution of the control method of the air conditioning system, after the step of "when Tm≤T1, controlling the first valve body to close and controlling the second valve body to open", the method further includes:

[0031] Continue to obtain the evaporator coil temperature Tm;

[0032] Comparing the evaporator coil temperature Tm with a second preset temperature T2;

[0033] When Tm>T2, obtain the duration tc of Tm>T2;

[0034] Compare the duration tc with the preset time t1,

[0035] When tc≥t1, the first valve body is controlled to open, and the second valve body is controlled to maintain the original operating state.

[0036] In the preferred technical solution of the control method of the air conditioning system, when the first valve body is arranged on the heat exchange branch, the step of "selectively controlling the second valve body and the first valve body to open according to the comparison result" specifically includes:

[0037] When Tm≤T1, controlling the second valve body and the first valve body to open;

[0038] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0039] When T1<Tm≤T2, the first valve body is controlled to be closed and the second valve body is controlled to be opened;

[0040] When Tm>T2, the first valve body and the second valve body are controlled to be closed.

[0041] In the preferred technical solution of the control method of the air conditioning system, after the step of "when Tm≤T1, controlling the second valve body and the first valve body to open", the method further includes:

[0042] Continue to obtain the evaporator coil temperature Tm;

[0043] Comparing the evaporator coil temperature Tm with a second preset temperature T2;

[0044] When Tm>T2, obtain the duration tc of Tm>T2;

[0045] Compare the duration tc with the preset time t1,

[0046] When tc≥t1, the first valve body is controlled to be closed, and the second valve body is controlled to maintain the original operating state.

[0047] In the preferred technical solution of the control method of the air conditioning system, when the first valve body is respectively provided on the inlet side and the heat exchange branch of the evaporator, the step of "selectively controlling the second valve body and the first valve body to open according to the comparison result" specifically includes:

[0048] When Tm≤T1, the first valve body on the inlet side of the evaporator is controlled to be closed, and the second valve body and the first valve body on the heat exchange branch are controlled to be opened;

[0049] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0050] When T1<Tm≤T2, the second valve body and the first valve body at the inlet side of the evaporator are controlled to be opened, and the first valve body on the heat exchange branch is controlled to be closed;

[0051] When Tm>T2, the first valve body on the inlet side of the evaporator is controlled to open, and the second valve body and the first valve body on the heat exchange branch are closed.

[0052] In the preferred technical solution of the control method of the air conditioning system, after the step of "when Tm≤T1, controlling the first valve body on the inlet side of the evaporator to close, and controlling the second valve body and the first valve body on the heat exchange branch to open", the following step is further included:

[0053] Continue to obtain the evaporator coil temperature Tm;

[0054] Comparing the evaporator coil temperature Tm with a second preset temperature T2;

[0055] When Tm>T2, obtain the duration tc of Tm>T2;

[0056] Compare the duration tc with the preset time t1,

[0057] When tc≥t1, the first valve body on the inlet side of the evaporator is controlled to be opened, and the second valve body and the first valve body on the heat exchange branch are closed.

[0058] Solution 1. An air conditioning system, characterized in that the air conditioning system comprises an evaporator, a driving mechanism, a heat exchange device, a heat storage device and a first valve body;

[0059] The heat exchange device is arranged on the driving mechanism;

[0060] The heat storage device comprises a device body, in which a phase change material and a heat storage channel and a heat exchange channel which are not connected to each other are arranged, the heat storage channel and the heat exchange device form a heat storage circuit, and a second valve body is arranged on the heat storage circuit, so that when the second valve body is in an open state, the first refrigerant in the heat exchange device can exchange heat with the first refrigerant in the heat storage channel, so that heat is stored in the phase change material;

[0061] Both ends of the heat exchange channel are arranged on the inlet side of the evaporator to form a heat exchange branch;

[0062] The first valve body is configured to change the flow path of the second refrigerant flowing into the evaporator, so that when the second refrigerant flows into the heat exchange branch, the heat stored in the phase change material can exchange heat with the second refrigerant in the heat exchange channel.

[0063] Solution 2. The air-conditioning system according to Solution 1 is characterized in that the outer sides of the heat storage channel and the heat exchange channel are filled with the phase change material.

[0064] Solution 3. The air-conditioning system according to Solution 2 is characterized in that the heat storage channel and the heat exchange channel are in a double helix structure.

[0065] Solution 4. The air conditioning system according to Solution 1, characterized in that the outer side of the device body is wrapped with a heat-insulating material; and / or

[0066] A heat-conducting material is arranged on the inner side of the device body.

[0067] Option 5. The air-conditioning system according to Option 1 is characterized in that the heat exchange device includes a heat exchange tube arranged on the outer wall of the driving mechanism, the first end of the heat exchange tube is connected to the first end of the heat storage channel, and the second end of the heat exchange tube is connected to the second end of the heat storage channel.

[0068] Solution 6. The air conditioning system according to Solution 5 is characterized in that the heat exchange tube is wound around the outer wall of the driving mechanism.

[0069] Solution 7. The air conditioning system according to Solution 1 is characterized in that the first valve body is arranged at the inlet side of the evaporator, the inlet side of the first valve body is connected to the first end of the heat exchange branch, and the outlet side of the first valve body is connected to the second end of the heat exchange branch; and / or

[0070] The first valve body is arranged on the heat exchange branch.

[0071] Solution 8. The air-conditioning system according to Solution 1 is characterized in that the air-conditioning system also includes a compressor, a throttling device and a condenser, and the compressor, the evaporator, the throttling device and the condenser are connected in sequence to form a refrigerant circuit.

[0072] Solution 9. The air conditioning system according to Solution 1 is characterized in that the first valve body is a first solenoid valve or a first electric valve; and / or

[0073] The second valve body is a second solenoid valve or a second electric valve; and / or

[0074] The driving mechanism is a motor.

[0075] Solution 10. 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 9, wherein the control method comprises:

[0076] When the air conditioner is running, the evaporator coil temperature Tm is obtained;

[0077] Comparing the evaporator coil temperature Tm with the first preset temperature T1;

[0078] According to the comparison result, the second valve body and the first valve body are selectively controlled to be opened or closed.

[0079] Solution 11. The control method according to Solution 10 is characterized in that, when the first valve body is arranged at the inlet side of the evaporator, the step of "selectively controlling the second valve body and the first valve body to be opened or closed according to the comparison result" specifically includes:

[0080] When Tm≤T1, the first valve body is controlled to be closed, and the second valve body is controlled to be opened;

[0081] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0082] When T1<Tm≤T2, the first valve body and the second valve body are controlled to open;

[0083] When Tm>T2, the first valve body is controlled to be opened and the second valve body is controlled to be closed.

[0084] Solution 12. The control method according to Solution 11 is characterized in that after the step of “when Tm≤T1, controlling the first valve body to close and controlling the second valve body to open”, it also includes:

[0085] Continue to obtain the evaporator coil temperature Tm;

[0086] Comparing the evaporator coil temperature Tm with a second preset temperature T2;

[0087] When Tm>T2, obtain the duration tc of Tm>T2;

[0088] Compare the duration tc with the preset time t1,

[0089] When tc≥t1, the first valve body is controlled to open, and the second valve body is controlled to maintain the original operating state.

[0090] Solution 13. The control method according to Solution 10 is characterized in that when the first valve body is arranged on the heat exchange branch, the step of "selectively controlling the second valve body and the first valve body to be opened or closed according to the comparison result" specifically includes:

[0091] When Tm≤T1, controlling the second valve body and the first valve body to open;

[0092] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0093] When T1<Tm≤T2, the first valve body is controlled to be closed and the second valve body is controlled to be opened;

[0094] When Tm>T2, the first valve body and the second valve body are controlled to be closed.

[0095] Solution 14. The control method according to Solution 13 is characterized in that after the step of “when Tm≤T1, controlling the second valve body and the first valve body to open”, it also includes:

[0096] Continue to obtain the evaporator coil temperature Tm;

[0097] Comparing the evaporator coil temperature Tm with a second preset temperature T2;

[0098] When Tm>T2, obtain the duration tc of Tm>T2;

[0099] Compare the duration tc with the preset time t1,

[0100] When tc≥t1, the first valve body is controlled to be closed, and the second valve body is controlled to maintain the original operating state.

[0101] Solution 15. The control method according to Solution 10 is characterized in that when the first valve body is respectively provided on the inlet side and the heat exchange branch of the evaporator, the step of “selectively controlling the second valve body and the first valve body to be opened or closed according to the comparison result” specifically includes:

[0102] When Tm≤T1, the first valve body on the inlet side of the evaporator is controlled to be closed, and the second valve body and the first valve body on the heat exchange branch are controlled to be opened;

[0103] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0104] When T1<Tm≤T2, the second valve body and the first valve body at the inlet side of the evaporator are controlled to be opened, and the first valve body on the heat exchange branch is controlled to be closed;

[0105] When Tm>T2, the first valve body on the inlet side of the evaporator is controlled to open, and the second valve body and the first valve body on the heat exchange branch are closed.

[0106] Solution 16. The control method according to Solution 15 is characterized in that after the step of “when Tm≤T1, controlling the first valve body on the inlet side of the evaporator to close, and controlling the second valve body and the first valve body on the heat exchange branch to open”, it also includes:

[0107] Continue to obtain the evaporator coil temperature Tm;

[0108] Comparing the evaporator coil temperature Tm with a second preset temperature T2;

[0109] When Tm>T2, obtain the duration tc of Tm>T2;

[0110] Compare the duration tc with the preset time t1,

[0111] When tc≥t1, the first valve body on the inlet side of the evaporator is controlled to be opened, and the second valve body and the first valve body on the heat exchange branch are closed.

[0112] It can be understood by those skilled in the art that the air conditioning system of the present application includes an evaporator, a driving mechanism, a heat exchange device and a heat storage device, wherein the heat exchange device is arranged on the driving mechanism, and the heat storage device is provided with a phase change material and a heat storage channel and a heat exchange channel that are not connected to each other, and the heat storage channel and the heat exchange device form a heat storage circuit, so that the first refrigerant in the heat exchange device can exchange heat with the first refrigerant in the heat storage channel, and then the heat generated by the driving mechanism can be stored in the phase change material. Both ends of the heat exchange channel are arranged on the inlet side of the evaporator, so as to form a heat exchange branch, so that the second refrigerant enters the heat exchange branch before entering the evaporator, and the second refrigerant in the heat exchange branch can absorb the heat released by the phase change material, increase the temperature of the second refrigerant, thereby increasing the evaporation temperature of the evaporator, and then increasing the air outlet temperature of the indoor unit, so that the air conditioner can still ensure the heating effect of the air conditioner when the frequency is reduced.

[0113] Furthermore, by arranging the phase change material on the outside of the heat storage channel and the heat exchange channel, the phase change material is facilitated to absorb heat in the heat storage channel, and at the same time, the phase change material is facilitated to release heat to the second refrigerant in the heat exchange channel.

[0114] Furthermore, by arranging a heat-insulating material on the outside of the device body, heat preservation can be achieved and the heat stored in the phase change material can be prevented from being lost.

[0115] 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, so that the temperature of the first refrigerant in the heat exchange tube increases, and at the same time the driving mechanism can be cooled.

[0116] Those skilled in the art can understand that the control method of the air-conditioning system of the present application includes obtaining the evaporator coil temperature when the air-conditioning is running, and comparing the evaporator coil temperature with the first preset temperature, and selectively controlling the second valve body and the first valve body to open or close according to the comparison result, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material. At the same time, the second refrigerant enters the heat exchange branch before entering the evaporator. The second refrigerant in the heat exchange branch can absorb the heat released by the phase change material, increase the temperature of the second refrigerant, thereby increasing the evaporation temperature of the evaporator, and then increasing the air outlet temperature of the indoor unit, so that the heating effect of the air-conditioning can be guaranteed when the air-conditioning is running at a reduced frequency.

[0117] Further, in the case where a first valve body is provided at the inlet side of the evaporator, when the temperature of the evaporator coil is less than or equal to the first preset temperature, the first valve body is controlled to be closed, and the second valve body is controlled to be opened, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material, and the second refrigerant enters the heat exchange branch before entering the evaporator. The second refrigerant in the heat exchange branch can absorb the heat released by the phase change material, increase the temperature of the second refrigerant, thereby increasing the evaporation temperature of the evaporator, and then increasing the air outlet temperature of the indoor unit, so that the air conditioner can still ensure the heating effect of the air conditioner when the frequency is reduced. When the temperature of the evaporator coil is greater than the first preset temperature, the evaporator coil temperature is compared with the second preset temperature. When the temperature of the evaporator coil is greater than the first preset temperature and less than or equal to the second preset temperature, the first valve body and the second valve body are controlled to be opened, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material. Since the temperature of the evaporator coil is high, the second refrigerant no longer passes through the heat exchange branch, but directly enters the evaporator, so that the air conditioner can still ensure the heating effect of the air conditioner when the frequency is reduced. When the evaporator coil temperature is greater than the second preset temperature, the evaporator temperature is high. At this time, the second valve body and the first valve body are controlled to be closed, and the air conditioner can operate normally and still have a good heating effect.

[0118] Furthermore, when the evaporator coil temperature is less than or equal to the first preset temperature, the first valve body is controlled to close and the second valve body is opened, the evaporator coil temperature continues to be obtained, and the evaporator coil temperature is compared with the second preset temperature. When the evaporator coil temperature is greater than the second preset temperature, the duration of the evaporator coil temperature greater than the second preset temperature is obtained. When the duration is greater than or equal to the preset time, the first valve body is controlled to open, and the second valve body is controlled to maintain the original operating state, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material. Since the evaporator coil temperature is relatively high, part of the second refrigerant no longer passes through the heat exchange branch, but directly enters the evaporator, so that the heating effect of the air conditioner can still be guaranteed when the air conditioner is operated at a reduced frequency.

[0119] Further, in the case where a first valve body is provided on the heat exchange branch, when the temperature of the evaporator coil is less than or equal to the first preset temperature, the second valve body and the first valve body are controlled to open, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material, and the second refrigerant enters the heat exchange branch before entering the evaporator. The second refrigerant in the heat exchange branch can absorb the heat released by the phase change material, increase the temperature of the second refrigerant, thereby increasing the evaporation temperature of the evaporator, and then increasing the air outlet temperature of the indoor unit, so that the air conditioner can still ensure the heating effect of the air conditioner when the frequency is reduced. When the temperature of the evaporator coil is greater than the first preset temperature, the evaporator coil temperature is compared with the second preset temperature. When the evaporator coil temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the first valve body is controlled to close and the second valve body is controlled to open, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material. Since the temperature of the evaporator coil is high, the second refrigerant no longer passes through the heat exchange branch, but directly enters the evaporator, so that the air conditioner can still ensure the heating effect of the air conditioner when the frequency is reduced. When the evaporator coil temperature is greater than the second preset temperature, the evaporator temperature is high. At this time, the second valve body and the first valve body are controlled to be closed, and the air conditioner can operate normally and still have a good heating effect.

[0120] Furthermore, when the evaporator coil temperature is less than or equal to the first preset temperature, the first valve body is controlled to close and the second valve body is opened, and the evaporator coil temperature continues to be obtained, and the evaporator coil temperature is compared with the second preset temperature. When the evaporator coil temperature is greater than the second preset temperature, the duration of the evaporator coil temperature greater than the second preset temperature is obtained. When the duration is greater than or equal to the preset time, the first valve body is controlled to close, and the second valve body is controlled to maintain the original operating state, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material. Since the evaporator coil temperature is relatively high, the second refrigerant no longer passes through the heat exchange branch, but directly enters the evaporator, so that the air conditioner can still ensure the heating effect of the air conditioner when it is running at a reduced frequency.

[0121] Furthermore, when a first valve body is provided on the inlet side of the evaporator and on the heat exchange branch, when the evaporator coil temperature is less than or equal to the first preset temperature, the first valve body on the inlet side of the evaporator is controlled to close, and the second valve body and the first valve body on the heat exchange branch are controlled to open, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material. At the same time, the second refrigerant enters the heat exchange branch before entering the evaporator. The second refrigerant in the heat exchange branch can absorb the heat released by the phase change material and increase the temperature of the second refrigerant, thereby increasing the evaporation temperature of the evaporator, and then increasing the air outlet temperature of the indoor unit, so that the heating effect of the air conditioner can be guaranteed when the air conditioner is running at a reduced frequency. When the evaporator coil temperature is greater than the first preset temperature, the evaporator coil temperature is compared with the second preset temperature. When the evaporator coil temperature is greater than the first preset temperature and less than or equal to the second preset temperature, the second valve body and the first valve body on the inlet side of the evaporator are controlled to open, and the first valve body on the heat exchange branch is controlled to close, so that the heat exchange device can store the heat generated by the drive mechanism in the phase change material. Since the evaporator coil temperature is high, the second refrigerant no longer passes through the heat exchange branch, but directly enters the evaporator, so that the air conditioner can still ensure the heating effect of the air conditioner when the frequency is reduced. When the evaporator coil temperature is greater than the second preset temperature, the evaporator temperature is high. At this time, the first valve body on the inlet side of the evaporator is controlled to open, and the second valve body and the first valve body on the heat exchange branch are closed, and the air conditioner still has a good heating effect when it is running normally.

[0122] Furthermore, when the evaporator coil temperature is less than or equal to the first preset temperature, the first valve body on the inlet side of the evaporator is controlled to open, and at the same time, the second valve body and the first valve body on the heat exchange branch are closed, and the evaporator coil temperature continues to be obtained, and the evaporator coil temperature is compared with the second preset temperature. When the evaporator coil temperature is greater than the second preset temperature, the duration of the evaporator coil temperature greater than the second preset temperature is obtained. When the duration is greater than or equal to the preset time, the first valve body is controlled to close, and the second valve body is controlled to maintain the original operating state, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material. Since the evaporator coil temperature is relatively high, the second refrigerant no longer passes through the heat exchange branch, but directly enters the evaporator, so that the heating effect of the air conditioner can still be guaranteed when the air conditioner is operated at a reduced frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0123] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0124] Figure 1 is a flow chart of the air conditioning system of this application;

[0125] Figure 2 is a flow chart of a control method of the air conditioning system of the present application;

[0126] Figure 3 It is a logic diagram of a possible implementation method of the air conditioning system control method of the present application.

[0127] List of reference numerals:

[0128] 1. Evaporator; 2. Compressor; 3. Condenser; 4. Electronic expansion valve; 5. Four-way valve; 6. Motor; 7. Heat storage device; 8. Heat storage circuit; 81. First solenoid valve; 9. Heat exchange branch; 91. Second solenoid valve. DETAILED DESCRIPTION

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] like Figure 1As shown, in order to solve the problem of how to ensure the heating effect of the air conditioner when the air conditioner is running at a reduced frequency, the air conditioning system of the present application includes an evaporator 1, a driving mechanism, a heat exchange device and a heat storage device 7. Among them, the heat exchange device is arranged on the driving mechanism. The heat storage device 7 includes a device body, in which a phase change material and a heat storage channel and a heat exchange channel that are not connected to each other are arranged. The heat storage channel and the heat exchange device form a heat storage circuit 8. A second valve body is arranged on the heat storage circuit 8 so that when the second valve body is in an open state, the first refrigerant in the heat exchange device can exchange heat with the first refrigerant in the heat storage channel, so that heat is stored in the phase change material. Both ends of the heat exchange channel are arranged on the inlet side of the evaporator 1 to form a heat exchange branch 9. The first valve body is arranged to change the flow path of the second refrigerant flowing into the evaporator 1, so that when the second refrigerant flows into the heat exchange branch 9, the heat stored in the phase change material can exchange heat with the second refrigerant in the heat exchange channel.

[0134] In the present application, the heat exchange device is arranged on the driving mechanism, and the heat storage device 7 is provided with a phase change material and a heat storage channel and a heat exchange channel that are not connected to each other. The heat storage channel and the heat exchange device form a heat storage circuit 8, so that the first refrigerant in the heat exchange device can exchange heat with the first refrigerant in the heat storage channel, and then the heat generated by the driving mechanism can be stored in the phase change material. Both ends of the heat exchange channel are arranged on the inlet side of the evaporator 1, so as to form a heat exchange branch 9, so that the second refrigerant enters the heat exchange branch 9 before entering the evaporator 1. The second refrigerant in the heat exchange branch 9 can absorb the heat released by the phase change material, increase the temperature of the second refrigerant, thereby increasing the evaporation temperature of the evaporator 1, and then increasing the air outlet temperature of the indoor unit, so that the air conditioner can still ensure the heating effect of the air conditioner when the frequency is reduced.

[0135] 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 an evaporator 1, a driving mechanism, a heat exchange device and a heat storage device 7, those skilled in the art can adjust the following settings so that the present application can be applied to more specific application scenarios.

[0136] Reference Figure 1 The air conditioning system includes an evaporator 1, a motor 6, a heat exchange device, a heat storage device 7, an electronic expansion valve 4, a condenser 3, a four-way valve 5 and a compressor 2.

[0137] See next Figure 1, the evaporator 1, the electronic expansion valve 4, the first solenoid valve 81, the condenser 3, the four-way valve 5 and the compressor 2 form a refrigerant circulation loop. Among them, the four-way valve 5 has an a end, a b end, a c end and a d end. The first solenoid valve 81 is arranged on the inlet side of the evaporator 1. The flow path of the second refrigerant in the refrigerant circulation loop is compressor 2 → a end of the four-way valve 5 → d end of the four-way valve 5 → the first solenoid valve 81 → evaporator 1 → electronic expansion valve 4 → condenser 3 → evaporator 1 → b end of the four-way valve 5 → c end of the electronic expansion valve 4 → compressor 2. The refrigerant circuit can meet the heating demand of the air-conditioning system.

[0138] Of course, the specific form of the first valve body on the inlet side of the evaporator 1 is not fixed in the present application, and those skilled in the art can adjust it according to the needs of the settings. For example, the first valve body can also be a first electric valve. It should be noted that the provision of the first valve body on the inlet side of the evaporator 1 is not necessary in the present application, and those skilled in the art can choose it according to the needs of the settings. When the first valve body is not provided on the inlet side of the evaporator 1, the flow path of the second refrigerant in the refrigerant circulation loop is compressor 2 → end a of the electronic expansion valve 4 → end d of the four-way valve 5 → evaporator 1 → electronic expansion valve 4 → condenser 3 → evaporator 1 → end b of the four-way valve 5 → end c of the electronic expansion valve 4 → compressor 2.

[0139] See next Figure 1 The heat storage device 7 includes a device body, a heat storage channel, a heat exchange channel and a phase change material are arranged in the device body, and the outer sides of the heat storage channel and the heat exchange channel are filled with phase change materials. The heat storage channel and the heat exchange channel are in a double helix structure, the outer side of the device body is wrapped with a heat preservation material, and the inner side of the device body is provided with a heat conductive material.

[0140] Of course, the setting form of the heat storage channel and the heat exchange channel is not fixed in this application, and those skilled in the art can adjust it according to the setting needs. For example, the heat storage channel and the heat exchange channel can be arranged side by side. It should be noted that there is no restriction on the material of the heat storage channel and the heat exchange channel, as long as the first refrigerant in the heat storage channel and the second refrigerant in the heat exchange channel can exchange heat with the phase change material. For example, the material of the heat storage channel and the heat exchange channel can both be copper.

[0141] See next Figure 1In addition to the evaporator 1, the electronic expansion valve 4, the condenser 3, the four-way valve 5 and the compressor 2 forming a refrigerant circulation loop, the air-conditioning system of the present application also includes a heat exchange branch 9 and a heat storage loop 8. Among them, a heat exchange channel is arranged on the heat exchange branch 9. The heat storage loop 8 is provided with a heat storage channel, a heat exchange device and a second solenoid valve 91. Among them, the heat exchange device is arranged on the driving mechanism, and can absorb the heat generated by the driving mechanism and store the heat in the phase change material. The second refrigerant in the heat exchange channel can absorb the heat released by the phase change material, so that the second refrigerant in the heat exchange channel can be heated, and the temperature of the second refrigerant can be increased, so that the evaporation temperature of the evaporator 1 can be increased, and then the air outlet temperature of the indoor unit can be increased, so that the heating effect of the air conditioner can still be guaranteed when the air conditioner is running at a reduced frequency.

[0142] Of course, the specific form of the second valve body is not fixed in the present application, and those skilled in the art can adjust it according to the setting requirements. For example, the second valve body can also be a second electric valve.

[0143] See next Figure 1 The inlet side of the first solenoid valve 81 provided at the inlet side of the evaporator 1 is connected to the first end of the heat exchange branch 9, and the outlet side of the first solenoid valve 81 is connected to the second end of the heat exchange branch 9 to form a heat exchange branch 9, on which a heat exchange channel is provided. The flow path of the second refrigerant can be changed by opening or closing the first solenoid valve 81. When the first solenoid valve 81 is closed, the flow path of the second refrigerant is the d end of the four-way valve 5 → the heat exchange channel → the evaporator 1, and the second refrigerant flowing out of the compressor 2 enters the evaporator 1 after passing through the heat exchange branch 9. When the second refrigerant flows through the heat exchange branch 9, the second refrigerant in the heat exchange channel can absorb the heat released by the phase change material, thereby increasing the temperature of the second refrigerant, thereby increasing the evaporation temperature of the evaporator 1, and then increasing the air outlet temperature of the indoor unit, so that the air conditioner can still ensure the heating effect of the air conditioner when the frequency is reduced. When the first solenoid valve 81 is opened, the flow path of the second refrigerant is the d end of the four-way valve 5 → the confluent part → the evaporator 1, wherein the confluent part is the part where the second refrigerant flowing out from the d end of the four-way valve 5 passes through the heat exchange branch 9 and the first solenoid valve 81 and then converges.

[0144] Of course, the present application does not fix the setting position and number of the first solenoid valve 81, and those skilled in the art can change it according to the setting needs. For example, the first solenoid valve 81 can also be set on the heat exchange branch 9. Or, the first solenoid valve 81 is respectively set on the inlet side of the evaporator 1 and the heat exchange branch 9. When the first solenoid valve 81 is set on the heat exchange branch 9, when the first solenoid valve 81 is opened, the second refrigerant flow path is the d end of the four-way valve 5 → the first solenoid valve 81 → the heat exchange channel → the evaporator 1. When the first solenoid valve 81 is closed, the second refrigerant flow path is the d end of the four-way valve 5 → the evaporator 1. When the first solenoid valve 81 is respectively set on the inlet side of the evaporator 1 and the heat exchange branch 9, when the first solenoid valve 81 on the heat exchange branch 9 is opened and the second solenoid valve 91 on the inlet side of the evaporator 1 is closed, the second refrigerant flow path is the d end of the four-way valve 5 → the heat exchange channel → the evaporator 1. When the first solenoid valve 81 on the heat exchange branch 9 is closed and the second solenoid valve 91 on the inlet side of the evaporator 1 is opened, the flow path of the second refrigerant is the d end of the four-way valve 5 → the first solenoid valve 81 on the inlet side of the evaporator 1 → the heat exchange channel → the evaporator 1. In addition, when the first solenoid valve 81 is provided on the heat exchange branch 9, the number of the first solenoid valves 81 can also be 2, that is, in addition to providing the second solenoid valve 91 on the pipeline connecting the outlet end of the heat exchange channel with the outlet side of the first solenoid valve 81, the second solenoid valve 91 can also be provided on the pipeline connecting the inlet end of the heat exchange channel with the inlet side of the first solenoid valve 81.

[0145] See next Figure 1 The heat exchange device includes a heat exchange tube arranged on the outer wall of the motor 6, the first end of the heat exchange tube is connected to the first end of the heat storage channel, and the second end of the heat exchange tube is connected to the second end of the heat storage channel. A second solenoid valve 91 is arranged on the pipeline connecting the first end of the heat exchange tube and the first end of the heat storage channel. When the second solenoid valve 91 is opened, the first refrigerant in the heat storage channel can exchange heat with the first refrigerant in the heat exchange tube, so that the temperature of the first refrigerant in the heat storage channel increases, and the phase change material exchanges heat with the second refrigerant through the heat storage channel, so that the phase change material can store the heat generated by the driving mechanism.

[0146] Of course, the number of second solenoid valves 91 provided in the present application is not fixed, and those skilled in the art can adjust it according to the needs of the settings. For example, the number of second solenoid valves 91 can be 2, that is, a second solenoid valve 91 is provided on the pipeline connecting the first end of the heat exchange tube with the first end of the heat storage channel, and a second solenoid valve 91 can also be provided on the pipeline connecting the second end of the heat exchange tube with the second end of the heat storage channel.

[0147] It should be noted that the present application has no restrictions on the material of the heat exchange tube, as long as the first refrigerant in the heat exchange tube is conducive to absorbing the heat generated by the motor 6. For example, the material of the heat exchange tube can be copper. In addition, the present application has no restrictions on the first refrigerant and the second refrigerant, as long as they are conducive to heat exchange. For example, the first refrigerant can be water, and the second refrigerant can be Freon. Among them, the driving mechanism of the present application is used to drive the fan in the indoor unit to rotate.

[0148] Next, the control method of the air conditioning system of the present application is introduced. Figure 2 1 is a flow chart of the control method of the air conditioning system of the present application, wherein the first valve body is introduced by taking the first solenoid valve 81 as an example, and the second valve body is introduced by taking the second solenoid valve 91 as an example.

[0149] 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:

[0150] S101, when the air conditioner is running, the evaporator coil temperature Tm is obtained. For example, a temperature sensor can be set on the evaporator 1 coil, and the evaporator coil temperature is obtained through the temperature sensor.

[0151] S102, comparing the evaporator coil temperature Tm with the first preset temperature T1. For example, after obtaining the evaporator 1 coil temperature, the two are compared by comparing whether the difference between the evaporator 1 coil temperature and the first preset temperature is greater than 0, or whether the ratio between the two is greater than 1.

[0152] S103, based on the comparison result, selectively control the second solenoid valve 91 and the first solenoid valve 81 to open or close. For example, after obtaining the comparison result between the coil temperature of the evaporator 1 and the first preset temperature, selectively control the second solenoid valve 91 and the first solenoid valve 81 to open or close, so that the phase change material can store the heat generated by the driving mechanism through the heat storage circuit 8, and the second refrigerant can enter the heat exchange branch 9 and exchange heat with the phase change material, thereby increasing the evaporation temperature of the evaporator 1.

[0153] When the air conditioner is running, the present application obtains the evaporator coil temperature, compares the evaporator coil temperature with the first preset temperature, and selectively controls the second solenoid valve 91 and the first solenoid valve 81 to open or close according to the comparison result, so that the heat exchange device can store the heat generated by the driving mechanism in the phase change material. At the same time, the second refrigerant enters the heat exchange branch 9 before entering the evaporator 1. The second refrigerant in the heat exchange branch 9 can absorb the heat released by the phase change material, increase the temperature of the second refrigerant, thereby increasing the evaporation temperature of the evaporator 1, and then increase the air outlet temperature of the indoor unit, so that the heating effect of the air conditioner can still be guaranteed when the air conditioner is running at a reduced frequency.

[0154] In a specific embodiment, when the control system further includes the first solenoid valve 81, when the first solenoid valve 81 is arranged at the inlet side of the evaporator 1, the step of "selectively controlling the second solenoid valve 91 and the first solenoid valve 81 to be opened or closed according to the comparison result" specifically includes:

[0155] When Tm≤T1, the first solenoid valve 81 is controlled to be closed, and the second solenoid valve 91 is controlled to be opened;

[0156] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0157] When T1<Tm≤T2, the first solenoid valve 81 and the second solenoid valve 91 are controlled to open;

[0158] When Tm>T2, the first solenoid valve 81 is controlled to be open and the second solenoid valve 91 is controlled to be closed.

[0159] For example, the first preset temperature is 30°C. When Tm≤30°C, it means that the evaporator coil temperature is relatively low. At this time, in order to improve the heating effect of the air conditioner, the first solenoid valve 81 is controlled to be closed, and the second solenoid valve 91 is controlled to be opened, so that the first refrigerant in the heat storage channel of the heat storage circuit 8 can exchange heat with the first refrigerant in the heat exchange tube, so that the heat generated by the driving mechanism can be stored in the phase change material. The second refrigerant flowing out of the compressor 2 completely enters the heat exchange branch 9 and exchanges heat with the phase change material, thereby increasing the temperature of the second refrigerant, and then improving the heating effect of the air conditioner, so that the air conditioner can still ensure the heating effect of the air conditioner under the condition of frequency reduction. When Tm>30°C, the evaporator coil temperature is compared with the second preset temperature. When 30°C<Tm≤35°C, the first solenoid valve 81 and the second solenoid valve 91 are controlled to be opened, so that part of the second refrigerant no longer enters the heat exchange branch 9, but directly enters the evaporator 1. When Tm>35℃, the first solenoid valve 81 is controlled to open and the second solenoid valve 91 is controlled to close, so that the first refrigerant in the heat storage channel of the heat storage circuit 8 and the first refrigerant in the heat exchange tube no longer exchange heat, and the second refrigerant no longer enters the heat exchange branch 9, but directly enters the evaporator 1.

[0160] Further, after the step of “when Tm≤T1, controlling the first solenoid valve 81 to close and controlling the second solenoid valve 91 to open”, the method further includes:

[0161] Continue to obtain the evaporator coil temperature Tm;

[0162] Comparing the evaporator coil temperature Tm with the second preset temperature T2;

[0163] When Tm>T2, obtain the duration tc of Tm>T2;

[0164] Compare the duration tc with the preset time t1,

[0165] When tc≥t1, the first solenoid valve 81 is controlled to open, and the second solenoid valve 91 is controlled to maintain the original operating state.

[0166] For example, the first preset temperature T1 is 30°C, the second preset temperature T2 is 35°C, and the preset time t1 is 3min. When Tm≤30°C, the first solenoid valve 81 is controlled to be closed, and the second solenoid valve 91 is controlled to be opened, so that the evaporation temperature of the evaporator 1 increases. At this time, the evaporator coil temperature Tm is continued to be obtained, and the evaporator coil temperature Tm is compared with the second preset temperature T2. When Tm>35°C, the duration tc of Tm>35°C is obtained. When tc≥3min, it means that the evaporator coil temperature is stable and maintains a high temperature. At this time, the first solenoid valve 81 is controlled to be opened, and the second solenoid valve 91 is controlled to maintain the original operating state, so that the phase change material continues to absorb the heat generated by the driving mechanism through the first refrigerant, and the second refrigerant flowing out of the compressor 2 no longer enters the heat exchange branch 9, but directly enters the evaporator 1.

[0167] In another alternative embodiment, when the first solenoid valve 81 is disposed on the heat exchange branch 9, the step of "selectively controlling the second solenoid valve 91 and the first solenoid valve 81 to be opened or closed according to the comparison result" specifically includes:

[0168] When Tm≤T1, the second solenoid valve 91 and the first solenoid valve 81 are controlled to open;

[0169] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0170] When T1<Tm≤T2, the first solenoid valve 81 is controlled to be closed and the second solenoid valve 91 is controlled to be opened;

[0171] When Tm>T2, the first solenoid valve 81 and the second solenoid valve 91 are controlled to be closed.

[0172] For example, the first preset temperature is 30°C. When Tm≤30°C, it means that the evaporator coil temperature is relatively low. At this time, in order to improve the heating effect of the air conditioner, the second solenoid valve 91 and the first solenoid valve 81 are controlled to open, so that the first refrigerant in the heat storage channel of the heat storage circuit 8 can exchange heat with the first refrigerant in the heat exchange tube, so that the heat generated by the driving mechanism can be stored in the phase change material. The second refrigerant flowing out of the compressor 2 completely enters the heat exchange branch 9 and exchanges heat with the phase change material, thereby increasing the temperature of the second refrigerant, and then improving the heating effect of the air conditioner, so that the air conditioner can still ensure the heating effect of the air conditioner under the condition of frequency reduction. When Tm>30°C, the evaporator coil temperature is compared with the second preset temperature. When 30°C<Tm≤35°C, the first solenoid valve 81 is controlled to be closed and the second solenoid valve 91 is controlled to be opened, so that the second refrigerant no longer enters the heat exchange branch 9, but directly enters the evaporator 1. When Tm>35℃, the first solenoid valve 81 and the second solenoid valve 91 are controlled to be closed, so that the first refrigerant in the heat storage channel of the heat storage circuit 8 and the first refrigerant in the heat exchange tube no longer exchange heat, and the second refrigerant no longer enters the heat exchange branch 9, but directly enters the evaporator 1.

[0173] Further, after the step of “when Tm≤T1, controlling the second solenoid valve 91 and the first solenoid valve 81 to open”, the method further includes:

[0174] Continue to obtain the evaporator coil temperature Tm;

[0175] Comparing the evaporator coil temperature Tm with the second preset temperature T2;

[0176] When Tm>T2, obtain the duration tc of Tm>T2;

[0177] Compare the duration tc with the preset time t1,

[0178] When tc≥t1, the first solenoid valve 81 is controlled to be closed, and the second solenoid valve 91 is controlled to maintain the original operating state.

[0179] For example, the first preset temperature T1 is 30°C, the second preset temperature T2 is 35°C, and the preset time t1 is 3min. When Tm≤30°C, the second solenoid valve 91 and the first solenoid valve 81 are controlled to open, so that the evaporation temperature of the evaporator 1 increases. At this time, the evaporator coil temperature Tm is continuously obtained, and the evaporator coil temperature Tm is compared with the second preset temperature T2. When Tm>35°C, the duration tc of Tm>35°C is obtained. When tc≥3min, it means that the evaporator coil temperature is stable and maintains a high temperature. At this time, the first solenoid valve 81 is controlled to be closed, and the second solenoid valve 91 is controlled to maintain the original operating state, so that the phase change material continues to absorb the heat generated by the driving mechanism through the first refrigerant, and the second refrigerant flowing out of the compressor 2 no longer enters the heat exchange branch 9, but directly enters the evaporator 1.

[0180] In other alternative embodiments, when the first solenoid valve 81 is respectively provided on the inlet side of the evaporator 1 and the heat exchange branch 9, the step of “selectively controlling the second solenoid valve 91 and the first solenoid valve 81 to be opened or closed according to the comparison result” specifically includes:

[0181] When Tm≤T1, the first solenoid valve 81 on the inlet side of the evaporator 1 is controlled to be closed, and the second solenoid valve 91 and the first solenoid valve 81 on the heat exchange branch 9 are controlled to be opened;

[0182] When Tm>T1, compare the evaporator coil temperature T with the second preset temperature T2;

[0183] When T1<Tm≤T2, the second solenoid valve 91 and the first solenoid valve 81 on the inlet side of the evaporator 1 are controlled to open, and the first solenoid valve 81 on the heat exchange branch 9 is controlled to close;

[0184] When Tm>T2, the first solenoid valve 81 on the inlet side of the evaporator 1 is controlled to open, and the second solenoid valve 91 and the first solenoid valve 81 on the heat exchange branch 9 are closed.

[0185] For example, the first preset temperature is 30°C. When Tm≤30°C, it means that the evaporator coil temperature is relatively low. At this time, in order to improve the heating effect of the air conditioner, the first solenoid valve 81 on the inlet side of the evaporator 1 is controlled to be closed, and the second solenoid valve 91 and the first solenoid valve 81 on the heat exchange branch 9 are controlled to be opened, so that the first refrigerant in the heat storage channel of the heat storage circuit 8 can exchange heat with the first refrigerant in the heat exchange tube, so that the heat generated by the driving mechanism can be stored in the phase change material. The second refrigerant flowing out of the compressor 2 completely enters the heat exchange branch 9 and exchanges heat with the phase change material, thereby increasing the temperature of the second refrigerant, and then improving the heating effect of the air conditioner, so that the air conditioner can still ensure the heating effect of the air conditioner under the condition of frequency reduction. When Tm>30℃, the evaporator coil temperature is compared with the second preset temperature. When 30℃<Tm≤35℃, the second solenoid valve 91 and the first solenoid valve 81 on the inlet side of the evaporator 1 are controlled to open, and the first solenoid valve 81 on the heat exchange branch 9 is controlled to close, so that the second refrigerant no longer enters the heat exchange branch 9, but directly enters the evaporator 1. When Tm>35℃, the first solenoid valve 81 on the inlet side of the evaporator 1 is controlled to open, and the second solenoid valve 91 and the first solenoid valve 81 on the heat exchange branch 9 are closed, so that the first refrigerant in the heat storage channel of the heat storage circuit 8 and the first refrigerant in the heat exchange tube no longer exchange heat, and the second refrigerant no longer enters the heat exchange branch 9, but directly enters the evaporator 1.

[0186] Further, after the step of “when Tm≤T1, controlling the first solenoid valve 81 on the inlet side of the evaporator 1 to be closed, and controlling the second solenoid valve 91 and the first solenoid valve 81 on the heat exchange branch 9 to be opened”, the method further includes:

[0187] Continue to obtain the evaporator coil temperature Tm;

[0188] Comparing the evaporator coil temperature Tm with the second preset temperature T2;

[0189] When Tm>T2, obtain the duration tc of Tm>T2;

[0190] Compare the duration tc with the preset time t1,

[0191] When tc≥t1, the first solenoid valve 81 on the inlet side of the evaporator 1 is controlled to open, and the second solenoid valve 91 and the first solenoid valve 81 on the heat exchange branch 9 are closed.

[0192] For example, the first preset temperature T1 is 30°C, the second preset temperature T2 is 35°C, and the preset time t1 is 3min. When Tm≤30°C, the first solenoid valve 81 on the inlet side of the evaporator 1 is controlled to be closed, and the second solenoid valve 91 and the first solenoid valve 81 on the heat exchange branch 9 are controlled to be opened, so that the evaporation temperature of the evaporator 1 increases. At this time, the evaporator coil temperature Tm is continuously obtained, and the evaporator coil temperature Tm is compared with the second preset temperature T2. When Tm>35°C, the duration tc of Tm>35°C is obtained. When tc≥3min, it means that the evaporator coil temperature is stable and maintains a high temperature. At this time, the first solenoid valve 81 on the inlet side of the evaporator 1 is controlled to be opened, and the second solenoid valve 91 and the first solenoid valve 81 on the heat exchange branch 9 are closed, so that the phase change material continues to absorb the heat generated by the driving mechanism through the first refrigerant, and the second refrigerant flowing out of the compressor 2 no longer enters the heat exchange branch 9, but directly enters the evaporator 1.

[0193] 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.

[0194] The first solenoid valve 81 is disposed at the inlet side of the evaporator 1 .

[0195] S201, when the air conditioner is running, obtain the evaporator coil temperature Tm, and then execute S202.

[0196] S202, determine whether Tm≤30°C is established. If yes, execute S203, otherwise execute S209.

[0197] S203, control the first solenoid valve 81 to close, and control the second solenoid valve 91 to open, and then execute S204

[0198] S204, continue to obtain the evaporator coil temperature Tm, and then execute S205.

[0199] S205, determine whether Tm>35°C is established. If yes, execute S206, otherwise execute S204.

[0200] S206, obtaining the duration tc of Tm>35°C, and then executing S207.

[0201] S207, determine whether tc ≥ 3min is established. If yes, execute S208, otherwise execute S206.

[0202] S208, controlling the first solenoid valve 81 to open, and controlling the second solenoid valve 91 to maintain the original operating state.

[0203] S209, judging whether 30°C < Tm ≤ 35°C is established. If so, executing S210, otherwise executing S211.

[0204] S210, controlling the first solenoid valve 81 and the second solenoid valve 91 to open.

[0205] S211, controlling the first solenoid valve 81 to open and the second solenoid valve 91 to close.

[0206] Those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments may be used in any combination.

[0207] So far, the technical solutions of the present 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 the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present 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 the present application.

Claims

1. An air conditioning system, characterized in that: The air conditioning system comprises an evaporator, a driving mechanism, a heat exchange device, a heat storage device and a first valve body; The heat exchange device is arranged on the driving mechanism; The heat storage device comprises a device body, in which a phase change material and a heat storage channel and a heat exchange channel which are not connected to each other are arranged, the heat storage channel and the heat exchange device form a heat storage circuit, and a second valve body is arranged on the heat storage circuit, so that when the second valve body is in an open state, the first refrigerant in the heat exchange device can exchange heat with the first refrigerant in the heat storage channel, so that heat is stored in the phase change material; Both ends of the heat exchange channel are arranged on the inlet side of the evaporator to form a heat exchange branch; The first valve body is configured to change the flow path of the second refrigerant flowing into the evaporator, so that when the second refrigerant flows into the heat exchange branch, the heat stored in the phase change material can exchange heat with the second refrigerant in the heat exchange channel.

2. The air conditioning system according to claim 1, characterized in that: The outer sides of the heat storage channel and the heat exchange channel are filled with the phase change material.

3. The air conditioning system according to claim 2, characterized in that: The heat storage channel and the heat exchange channel are in a double helix structure.

4. The air conditioning system according to claim 1, characterized in that: The outer side of the device body is wrapped with a heat-insulating material; and / or A heat-conducting material is arranged on the inner side of the device body.

5. The air conditioning system according to claim 1, characterized in that: The heat exchange device includes a heat exchange tube arranged on the outer wall of the driving mechanism, a first end of the heat exchange tube is communicated with a first end of the heat storage channel, and a second end of the heat exchange tube is communicated with a second end of the heat storage channel.

6. The air conditioning system according to claim 5, characterized in that: The heat exchange tube is wound around the outer wall of the driving mechanism.

7. The air conditioning system according to claim 1, characterized in that: The first valve body is arranged at the inlet side of the evaporator, the inlet side of the first valve body is communicated with the first end of the heat exchange branch, and the outlet side of the first valve body is communicated with the second end of the heat exchange branch; and / or The first valve body is arranged on the heat exchange branch.

8. The air conditioning system according to claim 1, characterized in that: The air conditioning system also includes a compressor, a throttling device and a condenser. The compressor, the evaporator, the throttling device and the condenser are connected in sequence to form a refrigerant circuit.

9. The air conditioning system according to claim 1, characterized in that: The first valve body is a first solenoid valve or a first electric valve; and / or The second valve body is a second solenoid valve or a second electric valve; and / or The driving mechanism is a motor.

10. A method for controlling an air conditioning system, wherein the air conditioning system is the air conditioning system according to any one of claims 1 to 9, characterized in that: The control method comprises: When the air conditioner is running, the evaporator coil temperature Tm is obtained; Comparing the evaporator coil temperature Tm with the first preset temperature T1; According to the comparison result, the second valve body and the first valve body are selectively controlled to be opened or closed.

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