Compressed air conditioning system

Abstract

The present invention provides a compressed air air conditioning system, including a boost expansion component, an air compressor is connected to an air outlet of an indoor space through a first air intake port, an expander is connected to a first exhaust port of the air compressor through a second air intake port, and the expander is connected to an air supply port of the indoor space through a second exhaust port. A first heat exchanger is provided between the first exhaust port and the second air intake port, and a second heat exchanger is provided between the first heat exchanger and the second air intake port. The air in the pipeline between the second exhaust port and the air supply port can be heat-exchanged with the air in the pipeline between the first heat exchanger and the second air intake port in the second heat exchanger, and a gas-liquid separator is provided between the second heat exchanger and the second air intake port. According to the present invention, the water vapor content in the compressed air is effectively reduced. On the one hand, it can prevent liquid droplets from entering the expander and causing liquid hammer damage to the impeller therein, and on the other hand, it can also effectively reduce the humidity of the air supply airflow, thereby improving the comfort of users.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to a compressed air air conditioning system. Background Art

[0002] At present, air conditioners mainly use a compressed refrigerant refrigeration cycle system, that is, the latent heat of phase change of the refrigerant is used to achieve room air conditioning. Most of the refrigerants in this air-conditioning system are harmful to the environment, such as the greenhouse effect and the ozone hole. In order to overcome this deficiency, the prior art discloses an air conditioning system that uses a boost expansion component to compress and expand the air to achieve cooling or heating. However, the air conditioning system does not have a dehumidification function, which makes the impeller in the expander have the risk of suction liquid hammer, and the humidity of the supply air flow is too high, and the user comfort is not good. Summary of the invention

[0003] Therefore, the present invention provides a compressed air air conditioning system to overcome the shortcomings of the prior art compressed air air conditioning system, which may cause the expansion machine impeller to suck liquid and reduce user comfort due to the lack of necessary dehumidification.

[0004] In order to solve the above problems, the present invention provides a compressed air air-conditioning system, including a boost expansion component, the boost expansion component including an air compressor and an expander connected by a rotating shaft of a motor, the air compressor is connected to an air outlet of an indoor space through a first air intake port, the expander is connected to a first exhaust port of the air compressor through a second air intake port, the expander is connected to an air supply port of the indoor space through a second exhaust port, a first heat exchanger is provided on a pipeline between the first exhaust port and the second air intake port, a second heat exchanger is provided on a pipeline between the first heat exchanger and the second air intake port, air in the pipeline between the second exhaust port and the air supply port can be heat exchanged with air in the pipeline between the first heat exchanger and the second air intake port in the second heat exchanger, and a gas-liquid separator is provided on the pipeline between the second heat exchanger and the second air intake port.

[0005] Preferably, a third heat exchanger is further provided on the pipeline between the first heat exchanger and the second heat exchanger, and the air in the pipeline between the gas-liquid separator and the second air intake port can be heat exchanged with the air in the pipeline between the first heat exchanger and the second heat exchanger in the third heat exchanger.

[0006] Preferably, the first airflow in the first pipeline between the air outlet and the first air intake port can introduce fresh air into the first pipeline; or, the second airflow in the second pipeline between the second exhaust port and the air supply port can introduce fresh air into the second pipeline.

[0007] Preferably, a first mixing chamber is provided on the first pipeline, and the first mixing chamber has a first fresh air inlet; or a second mixing chamber is provided on the second pipeline, and the second mixing chamber has a second fresh air inlet.

[0008] Preferably, a first air supply fan is provided in the fresh air introduction pipeline of the second fresh air introduction port, or a second air supply fan is provided in the pipeline between the second mixing chamber and the air supply port.

[0009] Preferably, a first flow regulating air valve is provided in the pipeline between the first mixing chamber and the air outlet, and / or a second flow regulating air valve is provided in the fresh air introduction pipeline of the first fresh air introduction port.

[0010] Preferably, the indoor space further has an air return port, and the air return port is connected to the second mixing chamber.

[0011] Preferably, a return air fan is provided in the pipeline between the return air port and the second mixing chamber.

[0012] Preferably, the compressed air air conditioning system also includes a heat exchange driven fan, which can drive outdoor air into the first flow path in the first heat exchanger so that the air in the first flow path can exchange heat with the air flowing out of the air compressor.

[0013] Preferably, a third mixing chamber is provided on the air inlet side pipeline of the first flow path, and the third mixing chamber has an exhaust gas inlet, and the exhaust gas inlet is communicated with the exhaust gas outlet of the indoor space.

[0014] Preferably, a third flow regulating air valve is provided on the pipeline between the exhaust gas inlet and the exhaust gas outlet; and / or a fourth flow regulating air valve is provided on the outdoor air inlet path of the third mixing chamber.

[0015] Preferably, the third mixing chamber further has a condensate inlet, and the condensate inlet is communicated with a drain port of the gas-liquid separator.

[0016] Preferably, the fan blades of the heat exchange driven fan are sleeved on the rotating shaft of the motor.

[0017] The present invention provides a compressed air air-conditioning system, in which the compressed air discharged from the expander after cooling is heat-exchanged with the air flow flowing out of the first heat exchanger in the second heat exchanger, that is, the second heat exchanger realizes the function of a condenser, can condense water vapor in the air, and separates it through the gas-liquid separator before the air enters the expander, thereby effectively reducing the water vapor content in the compressed air. On the one hand, it can prevent liquid droplets from entering the expander and causing liquid impact damage to the impeller therein, and on the other hand, it can also effectively reduce the humidity of the supply air flow and improve user comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The schematic diagram of the compressed air air conditioning system according to an embodiment of the present invention is shown in FIG. 1 , in which arrows indicate the direction of air flow;

[0019] Figure 2 for Figure 1 Another schematic diagram of the system principle, in which the arrows show the direction of air flow;

[0020] Figure 3 for Figure 1 A schematic diagram of another system principle, in which arrows indicate the direction of air flow;

[0021] Figure 4 This is a schematic diagram of the principle of a compressed air air conditioning system according to another embodiment of the present invention, in which arrows indicate the direction of air flow;

[0022] Figure 5 for Figure 4 Another schematic diagram of the system principle, in which the arrows show the direction of air flow;

[0023] Figure 6 for Figure 4 Another schematic diagram of a system principle is shown in the figure, in which the arrows indicate the direction of air flow.

[0024] The reference numerals are as follows:

[0025] 10. Motor; 11. Air compressor; 12. Expander; 13. First heat exchanger; 14. Second heat exchanger; 15. Third heat exchanger; 16. Gas-liquid separator; 21. Air outlet; 22. Air supply outlet; 23. Exhaust gas outlet; 24. Return air outlet; 31. First mixing chamber; 32. Second mixing chamber; 33. Third mixing chamber; 41. First air supply fan; 42. Second air supply fan; 43. First flow regulating air valve; 44. Second flow regulating air valve; 45. Third flow regulating air valve; 46. Fourth flow regulating air valve; 47. Return air fan; 5. Heat exchange drive fan; 100. Indoor space; 200. Outdoor space. DETAILED DESCRIPTION

[0026] See also Figures 1 to 6As shown, according to an embodiment of the present invention, a compressed air air conditioning system is provided, including a boost expansion component, the boost expansion component including an air compressor 11 and an expander 12 connected by a rotating shaft of a motor 10, the air compressor 11 is connected to an air outlet 21 of an indoor space 100 through a first air intake port, the expander 12 is connected to a first exhaust port of the air compressor 11 through a second air intake port, the expander 12 is connected to an air supply port 22 of the indoor space 100 through a second exhaust port, a first heat exchanger 13 is provided on a pipeline between the first exhaust port and the second air intake port, the first heat exchanger 13 is used to cool the high-temperature and high-pressure compressed gas discharged from the air compressor 11, a first airflow in the first pipeline between the air outlet 21 and the first air intake port can introduce fresh air from an outdoor space 200 into the first pipeline; or, a second airflow in the second pipeline between the second exhaust port and the air supply port 22 can introduce fresh air from the outdoor space 200 into the second pipeline. In this technical solution, the high-speed airflow of the first pipeline or the second pipeline is used to inject fresh air from the outdoor space 200 into the indoor space 100, thereby improving the indoor air quality and ensuring the health of the user. At the same time, the introduction of fresh air does not require a separate setting of a corresponding fresh air introduction fan, and can be achieved by only using the injection of the supply air flow. This simplifies the system structure and can also reduce the design cost of the system. In addition, by injecting fresh air through the supply air flow, the two can be mixed and then sent into the indoor space 100, and the temperature fluctuation of the indoor space 100 is small, ensuring the comfort of the user.

[0027] In some embodiments, the first pipeline is provided with a first mixing chamber 31, and the first mixing chamber 31 has a first fresh air inlet; or the second pipeline is provided with a second mixing chamber 32, and the second mixing chamber 32 has a second fresh air inlet. The fresh air and the corresponding high-speed airflow can be buffered and mixed in the chamber through the first mixing chamber 31 and the second mixing chamber 32, and especially mixed in the second mixing chamber 32 and sent to the indoor space 100, so that the temperature of the air supply can be more uniform after mixing, and the user comfort can be further improved. In some cases, the first mixing chamber 31 and the second mixing chamber 32 can be replaced by an ejector.

[0028] Furthermore, a first air supply fan 41 is provided in the fresh air introduction pipeline of the second fresh air inlet (that is, on the upstream side of the fresh air introduction path, the same below), or a second air supply fan 42 is provided in the pipeline between the second mixing chamber 32 and the air supply outlet 22. The amount of fresh air introduced can be adjusted by adjusting the speed of the first air supply fan 41 or the second air supply fan 42.

[0029] Preferably, a first flow regulating air valve 43 is provided in the pipeline between the first mixing chamber 31 and the air outlet 21, so as to be able to adjust and control the air outlet volume in the indoor space 100, and / or, a second flow regulating air valve 44 is provided in the fresh air introduction pipeline of the first fresh air introduction port, so as to be able to adjust and control the fresh air introduction volume in the outdoor space 200, thereby facilitating users to make reasonable adjustments according to fresh air needs.

[0030] In some embodiments, a second heat exchanger 14 is provided on the pipeline between the first heat exchanger 13 and the second air intake port, and the air in the pipeline between the second exhaust port and the air supply port 22 can be heat exchanged with the air in the pipeline between the first heat exchanger 13 and the second air intake port in the second heat exchanger 14. A gas-liquid separator 16 is provided on the pipeline between the second heat exchanger 14 and the second air intake port. In this technical solution, the cooled compressed air discharged from the expander 12 is heat exchanged with the air flow flowing out of the first heat exchanger 13 in the second heat exchanger 14, that is, the second heat exchanger 14 realizes the condenser function, which can condense water vapor in the air and separate it through the gas-liquid separator 16 before the air enters the expander 12, thereby effectively reducing the water vapor content in the compressed air. On the one hand, it can prevent liquid droplets from entering the expander 12 and causing liquid impact damage to the impeller therein (even ice or frost erosion); on the other hand, it can also effectively reduce the humidity of the supply air flow and improve user comfort.

[0031] Furthermore, a third heat exchanger 15 is provided on the pipeline between the first heat exchanger 13 and the second heat exchanger 14. The air in the pipeline between the gas-liquid separator 16 and the second air intake port can be heat-exchanged with the air in the pipeline between the first heat exchanger 13 and the second heat exchanger 14 in the third heat exchanger 15. In the third heat exchanger 15, the higher-temperature compressed gas from the first heat exchanger 13 process can heat up the lower-temperature compressed gas flowing out of the gas-liquid separator 16, thereby heating up and vaporizing the condensed liquid droplets that may remain in the compressed gas flowing out of the gas-liquid separator 16, further reducing the occurrence of suction liquid hammer of the expander 12.

[0032] In some embodiments, the compressed air air conditioning system also includes a heat exchange driven fan 5, which can drive outdoor air into the first flow path in the first heat exchanger 13, so that the air in the first flow path can exchange heat with the air flowing out of the air compressor 11. In this technical solution, the high-temperature and high-pressure gas discharged from the air compressor 11 is efficiently cooled by the air in the outdoor space 200, so that the compressed gas enters the expander 12 to achieve effective expansion and cooling.

[0033] Further, a third mixing chamber 33 is provided on the air inlet side pipeline of the first flow path, and the third mixing chamber 33 has an exhaust gas inlet, and the exhaust gas inlet is connected to the exhaust gas outlet 23 of the indoor space 100. In this technical solution, the exhaust gas of the indoor space 100 is introduced into the first flow path, which can fully utilize the waste gas residual energy (coldness) to cool the compressed gas, improve the heat exchange efficiency of the first heat exchanger 13, and improve the energy saving and environmental protection of the air conditioning system. In addition, under the premise of the same cooling capacity, the method of utilizing the waste gas residual energy can effectively reduce the demand for the amount of air in the first flow path, and can effectively reduce the energy consumption of the heat exchange drive fan 5. In some embodiments, a third flow regulating air valve 45 is provided on the pipeline between the exhaust gas inlet and the exhaust gas outlet 23; and / or a fourth flow regulating air valve 46 is provided on the outdoor air inlet path of the third mixing chamber 33, so as to control the exhaust gas introduction amount and the outdoor air introduction amount through the third flow regulating air valve 45 or the fourth flow regulating air valve 46.

[0034] In some embodiments, the third mixing chamber 33 also has a condensate inlet, which is connected to the drain port of the gas-liquid separator 16. At this time, the third mixing chamber 33 injects the condensate separated from the gas-liquid separator 16 into the first flow path. The injected condensate further cools the airflow in the first flow path in the form of water mist, thereby achieving efficient cooling of the compressed airflow in the second flow path, which can further improve the environmental protection of the system, and the energy consumption of the heat exchange drive fan 5 will also be further reduced.

[0035] Preferably, the blades of the heat exchange driven fan 5 are mounted on the rotating shaft of the motor 10, that is, the impeller of the expander 12 of the boost expansion fan assembly, the impeller of the air compressor 11, the rotor shaft of the motor 10 and the blades of the heat exchange driven fan 5 are all connected to the same shaft, so that the system structure is more compact. At the same time, the expansion work generated by the expansion of air in the expander 12 can also be superimposed on the useful work generated by the motor 10 to jointly drive the rotation of the air compressor 11 and the heat exchange driven fan 5, thereby improving the energy utilization rate.

[0036] In some embodiments, the indoor space 100 also has a return air outlet 24, and the return air outlet 24 is connected to the second mixing chamber 32 to mix with the supply air flow to reduce the temperature difference between the supply air point and the indoor space 100, thereby further improving the user's comfort. Furthermore, a return air fan 47 is provided in the pipeline between the return air outlet 24 and the second mixing chamber 32 to improve the fluidity of the airflow in the indoor space 100 and ensure the temperature uniformity in the indoor space 100.

[0037] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A compressed air conditioning system, characterized in that: The invention comprises a pressurizing and expanding assembly, the pressurizing and expanding assembly comprising an air compressor (11) and an expander (12) connected via a rotating shaft of a motor (10); the air compressor (11) is connected to an air outlet (21) of an indoor space (100) via a first air intake port; the expander (12) is connected to a first exhaust port of the air compressor (11) via a second air intake port; the expander (12) is connected to an air supply port (22) of the indoor space (100) via a second exhaust port; a first heat exchanger (13) is provided on a pipeline between the first exhaust port and the second air intake port; a second heat exchanger (14) is provided on a pipeline between the first heat exchanger (13) and the second air intake port; air in the pipeline between the second exhaust port and the air supply port (22) can be heated in the second heat exchanger (14) and heated in the pipeline between the first heat exchanger (13) and the second air intake port. The air in the pipeline between the air ports is heat exchanged, and a gas-liquid separator (16) is provided on the pipeline between the second heat exchanger (14) and the second air intake port; a third heat exchanger (15) is also provided on the pipeline between the first heat exchanger (13) and the second heat exchanger (14), and the air in the pipeline between the gas-liquid separator (16) and the second air intake port can be heat exchanged with the air in the pipeline between the first heat exchanger (13) and the second heat exchanger (14) in the third heat exchanger (15), so that the condensed water droplets that may remain in the compressed gas flowing out of the gas-liquid separator (16) are heated and vaporized; the first airflow in the first pipeline between the air outlet (21) and the first air intake port can introduce fresh air into the first pipeline; the second airflow in the second pipeline between the second exhaust port and the air supply port (22) can introduce fresh air into the second pipeline.

2. The compressed air conditioning system according to claim 1, characterized in that: The first pipeline is provided with a first mixing chamber (31), the first mixing chamber (31) having a first fresh air inlet; or the second pipeline is provided with a second mixing chamber (32), the second mixing chamber (32) having a second fresh air inlet.

3. The compressed air conditioning system according to claim 2, characterized in that: A first air supply fan (41) is provided in the fresh air introduction pipeline of the second fresh air introduction port, or a second air supply fan (42) is provided in the pipeline between the second mixing chamber (32) and the air supply port (22).

4. The compressed air conditioning system according to claim 2, characterized in that: A first flow regulating air valve (43) is provided in the pipeline between the first mixing chamber (31) and the air outlet (21), and / or a second flow regulating air valve (44) is provided in the fresh air introduction pipeline of the first fresh air introduction port.

5. The compressed air conditioning system according to claim 2, characterized in that: The indoor space (100) further comprises a return air port (24), wherein the return air port (24) is in communication with the second mixing chamber (32).

6. The compressed air conditioning system according to claim 5, characterized in that: A return air fan (47) is provided in the pipeline between the return air port (24) and the second mixing chamber (32).

7. The compressed air conditioning system according to claim 1, characterized in that: It also includes a heat exchange driven fan (5), which is capable of driving outdoor air into the first flow path in the first heat exchanger (13), so that the air in the first flow path can exchange heat with the air flowing out of the air compressor (11).

8. The compressed air conditioning system according to claim 7, characterized in that: A third mixing chamber (33) is provided on the air intake side pipeline of the first flow path. The third mixing chamber (33) has an exhaust gas inlet, and the exhaust gas inlet is connected to the exhaust gas outlet (23) of the indoor space (100).

9. The compressed air conditioning system according to claim 8, characterized in that: A third flow regulating air valve (45) is provided on the pipeline between the exhaust gas inlet and the exhaust gas outlet (23); and / or a fourth flow regulating air valve (46) is provided on the outdoor air inlet path of the third mixing chamber (33).

10. The compressed air conditioning system according to claim 8, characterized in that: The third mixing chamber (33) also has a condensed water inlet, and the condensed water inlet is connected to the drain port of the gas-liquid separator (16).

11. The compressed air conditioning system according to claim 7, characterized in that: The fan blades of the heat exchange driving fan (5) are sleeved on the rotating shaft of the motor (10).

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