Air conditioning system

Abstract

The present application provides an air conditioning system, including a condenser, a flash tank, and at least one cooling channel. The condenser is connected to the flash tank through the cooling channel. The cooling channel includes a cooling section, and the cooling section can cool the component to be cooled. When the air conditioning system is in the first working condition, the cooling medium flows through the cooling section and flows into the flash tank. The air conditioning system provided in the embodiments of the present invention can enable the component to be cooled in the air conditioning system to have an appropriate cooling effect, and improve the reliability and performance of the air conditioning system.

Description

Technical Field

[0001] This application belongs to the technical field of air conditioning, and particularly relates to an air conditioning system. Background Art

[0002] In existing air conditioning systems, especially in centrifugal chillers, it is necessary to cool key heat-generating components such as motors and frequency converters. In the prior art, a high-pressure liquid heat exchange medium is taken from the bottom of the condenser, and the high-pressure liquid heat exchange medium enters the component to be cooled. The heat exchange medium undergoes a phase change and absorbs heat to cool the component to be cooled, and itself evaporates into a gaseous heat exchange medium. The gaseous heat exchange medium enters the evaporator. During the entire cooling process, the pressure difference between the condenser and the evaporator is the power source of the cooling circuit, and the magnitude of the pressure difference directly determines the cooling effect of the component to be cooled. The greater the pressure difference, the stronger the cooling effect.

[0003] However, for a dual-mode air conditioning system, such as an ice storage dual-mode centrifugal chiller, it operates in the air conditioning mode during the day and in the ice storage mode at night. In the air conditioning mode, the evaporator pressure is relatively high, and the pressure difference between the condenser and the evaporator is relatively small; in the ice storage mode, the evaporator pressure is relatively low, and the pressure difference between the condenser and the evaporator is relatively large. When the cooling effect of the component to be cooled is moderate in the air conditioning mode and it is switched to the ice storage mode, the pressure difference between the condenser and the evaporator becomes larger, and the component to be cooled will experience overcooling, resulting in problems such as condensation and waste of cooling capacity, thereby affecting the reliability and performance of the unit. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this application is to provide an air conditioning system that can keep the component to be cooled in the air conditioning system at an appropriate cooling effect and improve the reliability and performance of the air conditioning system.

[0005] To solve the above problems, this application provides an air conditioning system, including a condenser, a flash tank, and at least one cooling channel. The condenser is connected to the flash tank through the cooling channel. The cooling channel includes a cooling section that can cool the component to be cooled. When the air conditioning system is in the first working condition, the cooling medium flows through the cooling section and flows into the flash tank.

[0006] Preferably, the air conditioning system further includes an evaporator. The condenser is connected to the evaporator through the cooling channel. When the air conditioning system is in the second working condition, the cooling medium flows through the cooling section and flows into the evaporator.

[0007] Preferably, the cooling channel further includes a first branch section and a second branch section. The condenser is connected to the flash evaporator through the cooling section and the first branch section, and the condenser is connected to the evaporator through the cooling section and the second branch section. When the air conditioning system is in the first operating condition, the cooling medium flows into the flash evaporator through the cooling section and the first branch section. When the air conditioning system is in the second operating condition, the cooling medium flows into the evaporator through the cooling section and the second branch section.

[0008] Preferably, a first control valve is provided on the first branch section. When the air conditioning system is in the first operating condition, the first control valve is opened so that the cooling medium flows into the flash evaporator through the cooling section and the first branch section.

[0009] Preferably, a second control valve is provided on the second branch section. When the air conditioning system is in the second operating condition, the second control valve is opened so that the cooling medium flows into the evaporator through the cooling section and the second branch section.

[0010] Preferably, the first operating condition is the ice storage condition, and the second operating condition is the air conditioning condition.

[0011] Preferably, the air conditioning system includes a first cooling channel and a second cooling channel. The first cooling channel is used to cool a first component to be cooled, and the second cooling channel is used to cool a second component to be cooled.

[0012] Preferably, the first component to be cooled is the motor of the compressor, and the second component to be cooled is the frequency converter.

[0013] Preferably, the first cooling channel includes a first cooling section, a first branch section, and a second branch section. When the air conditioning system is in the first operating condition, the cooling medium flows into the flash evaporator through the first cooling section and the first branch section. When the air conditioning system is in the second operating condition, the cooling medium flows into the evaporator through the first cooling section and the second branch section;

[0014] The second cooling channel includes a second cooling section, a third branch section, and a fourth branch section. When the air conditioning system is in the first operating condition, the cooling medium flows into the flash evaporator through the second cooling section and the third branch section. When the air conditioning system is in the second operating condition, the cooling medium flows into the evaporator through the second cooling section and the fourth branch section.

[0015] Preferably, a first control valve is provided on the first branch section, a second control valve is provided on the second branch section, a third control valve is provided on the third branch section, and a fourth control valve is provided on the fourth branch section;

[0016] When the air conditioning system is in the first working condition, the first control valve and the third control valve are opened, and the second control valve and the fourth control valve are closed, so that the cooling medium flows into the flash tank through the first cooling section, the first branch section, the second cooling section and the third branch section;

[0017] When the air conditioning system is in the second working condition, the second control valve and the fourth control valve are opened, and the first control valve and the third control valve are closed, so that the cooling medium flows into the evaporator through the first cooling section and the second branch section, the second cooling section and the fourth branch section.

[0018] Preferably, a throttling device is provided on the cooling channel between the component to be cooled and the condenser.

[0019] Preferably, the air conditioning system can also be a heat pump unit or a chiller.

[0020] Advantageous Effects

[0021] An air conditioning system provided in an embodiment of the present invention can enable a component to be cooled in the air conditioning system to be in an appropriate cooling effect, and improve the reliability and performance of the air conditioning system. Description of the Drawings

[0022] Figure 1 It is a system schematic diagram of an embodiment of the present application.

[0023] The reference numerals are shown as:

[0024] 1. Condenser; 2. Compressor; 3. Frequency converter; 4. Flash tank; 5. Evaporator; 61. First cooling section; 611. First throttling valve; 62. First branch section; 621. First control valve; 63. Second branch section; 631. Second control valve; 71. Second cooling section; 711. Second throttling valve; 72. Third branch section; 721. Third control valve; 73. Fourth branch section; 731. Fourth control valve. Detailed Embodiments

[0025] Referring to Figure 1 As shown, according to an embodiment of the present application, an air conditioning system includes a condenser 1, a flash tank 4 and at least one cooling channel. The condenser 1 is connected to the flash tank 4 through the cooling channel. The cooling channel includes a cooling section, and the cooling section can cool the component to be cooled. When the air conditioning system is in the first working condition, the cooling medium flows through the cooling section and into the flash tank 4. By providing the cooling channel, the component to be cooled is arranged on the cooling section, and the condenser 1 is communicated with the flash tank 4 through the cooling channel, so as to achieve an appropriate cooling effect under the first working condition and improve the reliability and performance of the air conditioning system.

[0026] The air conditioning system further includes an evaporator 5. The condenser 1 is connected to the evaporator 5 through a cooling channel. When the air conditioning system is in the second operating condition, the cooling medium flows through the cooling section and into the evaporator 5. By providing the evaporator 5 and connecting the condenser 1 to the evaporator 5 through a cooling channel, when the air conditioning system is in the second operating condition, the cooling medium can flow from the condenser 1 into the evaporator 5, ensuring that the component to be cooled can achieve an appropriate cooling effect in the second operating condition, and improving the reliability and performance of the air conditioning system.

[0027] In this embodiment, the first operating condition is the ice storage condition, and the second operating condition is the air conditioning condition. In the air conditioning condition, the pressure difference between the condenser 1 and the evaporator 5 is relatively small. In the ice storage condition, the pressure difference between the condenser 1 and the evaporator 5 is relatively large, while the pressure difference between the condenser 1 and the flash tank 4 is relatively small at this time. Therefore, in the ice storage condition, connecting the condenser 1 to the flash tank 4 and allowing the heat exchange medium to enter the flash tank 4 can effectively reduce the cooling degree of the component to be cooled, thereby reducing the subcooling phenomenon of the component to be cooled and preventing problems such as condensation and cold energy waste, ensuring the reliability and performance of the air conditioning system.

[0028] Further, when the air conditioning system is in the first operating condition, the pressure difference between the condenser 1 and the flash tank 4 is P1, and when the air conditioning system is in the second operating condition, the pressure difference between the condenser 1 and the evaporator 5 is P2. P1 and P2 are basically equal to ensure that the air conditioning system can achieve an appropriate cooling effect under different operating conditions, avoiding condensation, subcooling, etc., and improving the reliability and performance of the air conditioning system.

[0029] Further, in this embodiment, the heat exchange medium is a refrigerant.

[0030] The cooling channel further includes a first branch section 62 and a second branch section 63. The condenser 1 is connected to the flash tank 4 through the cooling section and the first branch section 62, and the condenser 1 is connected to the evaporator 5 through the cooling section and the second branch section 63. When the air conditioning system is in the first operating condition, the cooling medium flows into the flash tank 4 through the cooling section and the first branch section 62. When the air conditioning system is in the second operating condition, the cooling medium flows into the evaporator 5 through the cooling section and the second branch section 63. By providing the first branch section 62 and the second branch section 63, making the first branch section 62 communicate with the flash tank 4 and the second branch section 63 communicate with the evaporator 5, so that in the first operating condition, the heat exchange medium enters the flash tank 4, and in the second operating condition, the heat exchange medium enters the evaporator 5, which can effectively reduce the cooling degree of the component to be cooled, thereby reducing the subcooling phenomenon of the component to be cooled and preventing problems such as condensation and cold energy waste, ensuring the reliability and performance of the system.

[0031] Further, the first branch section 62 and the second branch section 63 are arranged in parallel, and the first branch section 62 and the second branch section 63 are connected in parallel to the cooling section.

[0032] A first control valve 621 is provided on the first branch section 62. When the air-conditioning system is in the first working condition, the first control valve 621 is opened so that the cooling medium flows into the flash tank 4 through the cooling section and the first branch section 62. A second control valve 631 is provided on the second branch section 63. When the air-conditioning system is in the second working condition, the second control valve 631 is opened so that the cooling medium flows into the evaporator 5 through the cooling section and the second branch section 63. By providing the first control valve 621 and the second control valve 631, when the air-conditioning system is in the first working condition, the first control valve 621 is opened and the second control valve 631 is closed. When the air-conditioning system is in the second working condition, the first control valve 621 is closed and the second control valve 631 is opened, ensuring that all the refrigerant enters the flash tank 4 in the first working condition and all enters the evaporator 5 in the second working condition, further ensuring that the components to be cooled in the air-conditioning system are in an appropriate cooling effect and improving the reliability and performance of the air-conditioning system.

[0033] Specifically, in this embodiment, the air-conditioning system includes a first cooling channel and a second cooling channel. The first cooling channel is used to cool the first component to be cooled, and the second cooling channel is used to cool the second component to be cooled. By providing the first cooling channel and the second cooling channel, two components to be cooled can be cooled simultaneously, ensuring the stable operation of the air-conditioning system.

[0034] A throttling device is provided on the cooling channel between the component to be cooled and the condenser 1. Through the throttling device, the refrigerant pressure is effectively reduced.

[0035] Further, the throttling device is a throttle valve.

[0036] Specifically, in this embodiment, the first component to be cooled is the motor of the compressor 2, and the second component to be cooled is the frequency converter 3.

[0037] The first cooling channel includes a first cooling section 61, a first branch section 62, and a second branch section 63. When the air-conditioning system is in the first working condition, the cooling medium flows into the flash tank 4 through the first cooling section 61 and the first branch section 62. When the air-conditioning system is in the second working condition, the cooling medium flows into the evaporator 5 through the first cooling section 61 and the second branch section 63. The second cooling channel includes a second cooling section 71, a third branch section 72, and a fourth branch section 73. When the air-conditioning system is in the first working condition, the cooling medium flows into the flash tank 4 through the second cooling section 71 and the third branch section 72. When the air-conditioning system is in the second working condition, the cooling medium flows into the evaporator 5 through the second cooling section 71 and the fourth branch section 73. By providing the first cooling section 61, the first branch section 62, the second branch section 63, the second cooling section 71, the third branch section 72, and the fourth branch section 73, the stable flow of the refrigerant is ensured, the phenomenon of overcooling of the components to be cooled is reduced, and problems such as condensation and cold quantity waste are prevented, ensuring the reliability and performance of the air-conditioning system.

[0038] A first control valve 621 is provided on the first branch section 62, a second control valve 631 is provided on the second branch section 63, a third control valve 721 is provided on the third branch section 72, and a fourth control valve 731 is provided on the fourth branch section 73.

[0039] When the air conditioning system is in the first working condition, the first control valve 621 and the third control valve 721 are opened, and the second control valve 631 and the fourth control valve 731 are closed, so that the cooling medium flows into the flash tank 4 through the first cooling section 61, the first branch section 62, the second cooling section 71, and the third branch section 72;

[0040] When the air conditioning system is in the second working condition, the second control valve 631 and the fourth control valve 731 are opened, and the first control valve 621 and the third control valve 721 are closed, so that the cooling medium flows into the evaporator 5 through the first cooling section 61, the second branch section 63, the second cooling section 71, and the fourth branch section 73. By providing the first control valve 621, the second control valve 631, the third control valve 721, and the fourth control valve 731, it is ensured that after the refrigerant passes through the motor of the compressor 2 and the frequency converter 3 in the first working condition, all of it enters the flash tank 4, and after the refrigerant passes through the motor of the compressor 2 and the frequency converter 3 in the second working condition, all of it enters the evaporator 5, further ensuring that the components to be cooled in the air conditioning system are in an appropriate cooling effect, and improving the reliability and performance of the air conditioning system.

[0041] A first throttle valve 611 is provided on the cooling channel between the motor of the compressor 2 and the condenser 1, and a second throttle valve 711 is provided on the cooling channel between the frequency converter 3 and the condenser 1.

[0042] Furthermore, the air conditioning system can also be a heat pump unit or a chiller unit.

[0043] An air conditioning system provided in an embodiment of the present invention can enable the components to be cooled in the air conditioning system to be in an appropriate cooling effect, and improve the reliability and performance of the air conditioning system.

[0044] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous manners can be freely combined and superimposed.

[0045] The above is only a preferred embodiment of the present application, and it is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present application, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. An air conditioning system, characterized in that, Comprising a condenser (1), a flash tank (4) and at least one cooling channel, the condenser (1) is in communication with the flash tank (4) through the cooling channel, the cooling channel includes a cooling section, and the cooling section is capable of cooling a component to be cooled. When the air conditioning system is in a first operating condition, the cooling medium flows through the cooling section and into the flash tank (4). The air conditioning system further includes an evaporator (5), the condenser (1) is in communication with the evaporator (5) through the cooling channel. When the air conditioning system is in a second operating condition, the cooling medium flows through the cooling section and into the evaporator (5). The first operating condition is the ice storage condition, and the second operating condition is the air conditioning condition. The cooling channel further includes a first branch section (62) and a second branch section (63). The condenser (1) is in communication with the flash tank (4) through the cooling section and the first branch section (62), and the condenser (1) is in communication with the evaporator (5) through the cooling section and the second branch section (63). When the air conditioning system is in the first operating condition, the cooling medium flows into the flash tank (4) through the cooling section and the first branch section (62). When the air conditioning system is in the second operating condition, the cooling medium flows into the evaporator (5) through the cooling section and the second branch section (63). When the air conditioning system is in the first operating condition, the pressure difference between the condenser (1) and the flash tank (4) is P1. When the air conditioning system is in the second operating condition, the pressure difference between the condenser (1) and the evaporator (5) is P2, and the pressure difference P1 is equal to or approaches the pressure difference P2.

2. The air conditioning system according to claim 1, wherein, A first control valve (621) is provided on the first branch section (62). When the air conditioning system is in the first operating condition, the first control valve (621) is opened so that the cooling medium flows into the flash tank (4) through the cooling section and the first branch section (62).

3. The air conditioning system according to claim 1, wherein A second control valve (631) is provided on the second branch section (63). When the air conditioning system is in the second operating condition, the second control valve (631) is opened so that the cooling medium flows into the evaporator (5) through the cooling section and the second branch section (63).

4. The air conditioning system according to claim 1, characterized in that, The air conditioning system includes a first cooling channel and a second cooling channel. The first cooling channel is used to cool a first component to be cooled, and the second cooling channel is used to cool a second component to be cooled.

5. The air conditioning system according to claim 4, wherein The first component to be cooled is the motor of the compressor (2), and the second component to be cooled is the frequency converter (3).

6. The air-conditioning system according to claim 4, wherein The first cooling channel includes a first cooling section (61), a first branch section (62) and a second branch section (63). When the air conditioning system is in the first operating condition, the cooling medium flows into the flash tank (4) through the first cooling section (61) and the first branch section (62). When the air conditioning system is in the second operating condition, the cooling medium flows into the evaporator (5) through the first cooling section (61) and the second branch section (63). The second cooling channel includes a second cooling section (71), a third branch section (72), and a fourth branch section (73). When the air conditioning system is in the first operating condition, the cooling medium flows into the flash tank (4) through the second cooling section (71) and the third branch section (72). When the air conditioning system is in the second operating condition, the cooling medium flows into the evaporator (5) through the second cooling section (71) and the fourth branch section (73).

7. The air conditioning system according to claim 6, characterized in that, A first control valve (621) is provided on the first branch section (62), a second control valve (631) is provided on the second branch section (63), a third control valve (721) is provided on the third branch section (72), and a fourth control valve (731) is provided on the fourth branch section (73); When the air conditioning system is in the first operating condition, the first control valve (621) and the third control valve (721) are opened, and the second control valve (631) and the fourth control valve (731) are closed, so that the cooling medium flows into the flash tank (4) through the first cooling section (61), the first branch section (62), the second cooling section (71), and the third branch section (72); When the air conditioning system is in the second operating condition, the second control valve (631) and the fourth control valve (731) are opened, and the first control valve (621) and the third control valve (721) are closed, so that the cooling medium flows into the evaporator (5) through the first cooling section (61), the second branch section (63), the second cooling section (71), and the fourth branch section (73).

8. The air conditioning system according to claim 1, characterized in that, A throttling device is provided on the cooling channel between the component to be cooled and the condenser (1).

9. The air conditioning system according to claim 1, wherein The air conditioning system can also be a heat pump unit or a chiller unit.

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