Water vapor compressor, water vapor compressor components and air conditioning units

Abstract

The present invention provides a water vapor compressor, a water vapor compressor assembly and an air conditioning unit. The water vapor compressor includes a shell, a bypass line and an air intake line, wherein the first end of the bypass line is connected to the exhaust port, and the second end of the bypass line is connected to the air intake port. The water vapor compressor, the water vapor compressor assembly and the air conditioning unit provided by the present invention use the bypass line to guide part of the exhaust gas to the air intake port, vaporize the water vapor with a low temperature in the air intake port at a high temperature and increase the water vapor pressure, thereby preventing a small amount of water vapor from aggregating into droplets due to insufficient temperature and contacting a high-speed rotating impeller, which can effectively reduce the compression power consumption of the impeller and fully improve the working efficiency of the compressor as a whole, and the evaporator and the condenser can adjust the temperature and pressure of the water vapor in the bypass line as needed, thereby ensuring that the water vapor compressor can work normally at any time, further ensuring the reliability of the compressor operation.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, in particular to a water vapor compressor, a water vapor compressor component and an air conditioning unit. Background Art

[0002] As a new generation of refrigerant, water has many advantages such as environmental friendliness (ODP=0, GWP<1), wide source of raw materials, low mining cost, high stability coefficient and sufficient vaporization heat storage, which can fully meet the high environmental protection requirements of heat pump air-conditioning systems; however, water is a fluid with low molecular weight, and its large specific volume and high adiabatic index when vaporized also limit the system pressure difference, resulting in small unit volume cooling capacity and high exhaust temperature. Therefore, compressors using water vapor as a new generation of refrigerant have higher standards than compressors using traditional refrigerants, such as high temperature resistance and high pressure resistance. For centrifugal compressors, although water vapor compressors have large volume flow, they are sensitive to droplets and have significant high-temperature exhaust problems. They have high structural requirements for shell materials, especially the impeller blades. Summary of the invention

[0003] In order to solve the technical problem in the prior art that the water vapor compressor has liquid in the air and affects the normal operation of the impeller blades, a water vapor compressor, a water vapor compressor assembly and an air conditioning unit are provided which utilize a bypass pipeline to introduce part of the exhaust gas into the air inlet to perform high-temperature gasification and pressurization of the water vapor entering the air inlet to avoid the presence of liquid droplets in the water vapor.

[0004] A water vapor compressor, comprising:

[0005] A shell, wherein an air inlet and an air outlet are arranged on the shell, and a compression chamber is arranged inside the shell;

[0006] a bypass pipeline, wherein a first end of the bypass pipeline is communicated with the exhaust port, and a second end of the bypass pipeline is communicated with the air inlet;

[0007] The air intake pipeline has an air intake end and an air outlet end, the air intake end is provided with the air inlet, the air outlet end is connected with the compression chamber, and the distance from the bypass pipeline to the air intake end is smaller than the distance from the bypass pipeline to the air outlet end.

[0008] A one-way valve is provided on the bypass pipeline, and the flow direction of the one-way valve is from the first end to the second end.

[0009] The bypass pipeline is provided with a flow regulating mechanism.

[0010] An exhaust temperature sensor is provided at the exhaust port, and the flow regulating mechanism is electrically connected to the exhaust temperature sensor; or, an exhaust pressure sensor is provided at the exhaust port, and the flow regulating mechanism is electrically connected to the exhaust pressure sensor; or, an exhaust temperature sensor and an exhaust pressure sensor are provided at the exhaust port, and the flow regulating mechanism is electrically connected to the exhaust temperature sensor and the exhaust pressure sensor.

[0011] The water vapor compressor also includes an air intake pipeline and a compression chamber, the air intake pipeline has an air intake end and an air outlet end, the air intake end is provided with the air inlet, the air outlet end is connected with the compression chamber, and the distance from the bypass pipeline to the air intake end is smaller than the distance from the bypass pipeline to the air outlet end.

[0012] A spiral flow channel is provided on the inner surface of the air inlet pipeline in the direction from the air inlet end to the air outlet end, and the bypass pipeline is connected to a portion of the spiral flow channel close to the air inlet end.

[0013] The outlet gas of the bypass pipeline enters the spiral flow channel along the tangent direction of the spiral flow channel.

[0014] A heat exchange channel is provided in the inner wall of the air inlet pipeline in the direction from the air inlet end to the air outlet end, the end of the heat exchange channel close to the air inlet end is connected to the bypass pipeline, and the end of the heat exchange channel close to the air outlet end is connected to the interior of the air inlet pipeline.

[0015] The heat exchange flow channel is distributed in a spiral shape with the axis of the air intake pipeline as the axis.

[0016] The water vapor compressor further comprises a return pipeline, the inlet of the return pipeline is communicated with the end of the heat exchange channel close to the air outlet, and the outlet of the return pipeline is communicated with the air inlet end of the air inlet pipeline.

[0017] The water vapor compressor also includes a first branch and a second branch, the outlet of the return pipeline is connected to the intake end of the intake pipeline through the first branch, the outlet of the return pipeline is connected to the exhaust port through the second branch, and valve body assemblies are provided on the first branch and the second branch.

[0018] The return pipeline is provided with a detection mechanism, and the valve body assembly of the first branch and the valve body assembly of the second branch are both adjusted according to the detection result of the detection mechanism.

[0019] The ratio of the length of the air intake pipeline to the inner diameter of the air intake pipeline ranges from 1:1 to 3:1.

[0020] The water vapor compressor further includes an impeller, and the impeller is disposed in the casing.

[0021] A water vapor compressor assembly, comprising the water vapor compressor

[0022] The water vapor compressor also includes an evaporator, the inlet and the outlet of the evaporator are both connected to the bypass pipeline, and part or all of the water vapor in the bypass pipeline can flow to the second end after being cooled and / or depressurized in the evaporator.

[0023] An intake air temperature sensor is arranged at the air inlet, an evaporation pipeline switch is arranged on the evaporator, and the evaporation pipeline switch is electrically connected to the intake air temperature sensor; or, an intake air pressure sensor is arranged at the air inlet, an evaporation pipeline switch is arranged on the evaporator, and the evaporation pipeline switch is electrically connected to the intake air pressure sensor; or, an intake air temperature sensor and an intake air pressure sensor are arranged at the air inlet, an evaporation pipeline switch is arranged on the evaporator, and the evaporation pipeline switch is electrically connected to the intake air temperature sensor and the intake air pressure sensor.

[0024] The water vapor compressor also includes a condenser, the inlet of the condenser and the outlet of the condenser are both connected to the bypass pipeline, and part or all of the water vapor in the bypass pipeline can flow to the second end after being heated and / or pressurized in the condenser.

[0025] The exhaust direction of the outlet of the condenser is directed toward the second end.

[0026] An intake air temperature sensor is arranged at the air inlet, a condensation line switch is arranged on the condenser, and the condensation line switch is electrically connected to the intake air temperature sensor; or, an intake air pressure sensor is arranged at the air inlet, a condensation line switch is arranged on the condenser, and the condensation line switch is electrically connected to the intake air pressure sensor; or, an intake air temperature sensor and an intake air pressure sensor are arranged at the air inlet, a condensation line switch is arranged on the condenser, and the condensation line switch is electrically connected to the intake air temperature sensor and the intake air pressure sensor.

[0027] The water vapor compressor also includes an evaporator and a condenser, wherein the inlet of the evaporator and the outlet of the evaporator are both connected to the bypass pipeline, and part or all of the water vapor in the bypass pipeline can flow to the second end after being cooled and / or depressurized in the evaporator, and the inlet of the condenser and the outlet of the condenser are both connected to the bypass pipeline, and part or all of the water vapor in the bypass pipeline can flow to the second end after being heated and / or pressurized in the condenser.

[0028] An air conditioning unit comprises the above-mentioned water vapor compressor or the above-mentioned water vapor compressor assembly.

[0029] The water vapor compressor, water vapor compressor assembly and air conditioning unit provided by the present invention utilize a bypass pipeline to guide part of the exhaust gas to the air inlet, vaporize the water vapor with a low temperature in the air inlet at a high temperature and increase the water vapor pressure, thereby preventing a small amount of water vapor from gathering into droplets due to insufficient temperature, contacting a high-speed rotating impeller, and impacting the blades. The compression power consumption of the impeller can be effectively reduced, and the working efficiency of the entire compressor can be fully improved. The evaporator and the condenser can adjust the temperature and pressure of the water vapor in the bypass pipeline as required, thereby ensuring that the water vapor compressor can work normally at any time, further ensuring the reliability of the compressor operation. At the same time, the air inlet pipeline and the spiral flow channel or heat exchange flow channel thereon can increase the influence of the water vapor in the bypass pipeline on the gas in the air inlet pipeline, further overcoming the problem of liquid inhalation, and can select the discharge position of the water vapor after heat exchange according to the temperature and / or pressure of the water vapor after heat exchange, thereby further improving the working efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a water vapor compressor according to an embodiment of the present invention;

[0031] Figure 2 Another structural schematic diagram of a water vapor compressor according to an embodiment of the present invention;

[0032] Figure 3 Another structural schematic diagram of a water vapor compressor according to an embodiment of the present invention;

[0033] Figure 4 A partial cross-sectional view of an air intake pipeline of an embodiment provided by the present invention;

[0034] Figure 5 Another partial cross-sectional view of the air intake pipeline of the embodiment provided by the present invention;

[0035] In the figure:

[0036] 1. Shell; 11. Air inlet; 12. Exhaust port; 2. Bypass pipeline; 3. One-way valve; 4. Flow regulating mechanism; 5. Evaporator; 6. Condenser; 7. Air inlet pipeline; 71. Spiral flow channel; 72. Heat exchange flow channel; 9. Return pipeline; 91. First branch; 92. Second branch. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] like Figures 1 to 5The water vapor compressor shown in the figure comprises: a shell 1, on which an air inlet 11 and an air outlet 12 are arranged, and a compression chamber is arranged in the shell 1; a bypass line 2, the first end of which is in communication with the air outlet 12, and the second end of which is in communication with the air inlet 11; an air inlet line 7, the air inlet line 7 having an air inlet end and an air outlet end, the air inlet end being provided with the air inlet 11, the air outlet end being in communication with the compression chamber, and the distance from the bypass line 2 to the air inlet end being smaller than the distance from the bypass line 2 to the air outlet end. Bypass line 2 is used to guide part of the exhaust gas of the water vapor compressor to the air inlet 11, and the exhaust gas is used to adjust the state of the water vapor at the air inlet 11. The temperature of the exhaust gas is very high, and the water vapor at the air inlet 11 can be fully vaporized, so that the water vapor cannot be gathered into droplets, thereby ensuring that there will be no strong impact on the impeller, thereby overcoming the problem of the normal operation of the water vapor compressor affected by the liquid inhaled in the prior art. Moreover, since the water vapor flowing from the bypass line to the air inlet has been completely compressed, the water vapor pressure at the suction end after mixing at the air inlet is also relatively high, and the small amount of compression of the compressor can be equivalently eliminated (if there is no mixing, the amount to be compressed is a fixed amount, and now after mixing through the air-intake liquid pipeline, the compression amount at the air-intake end is a=a1 (uncompressed water vapor)+a2 (compressed water vapor), so a1 here is less than a), and the power consumption required by the compressor to compress the same water vapor is also reduced accordingly. Therefore, the bypass line of the present invention can effectively reduce the compression energy consumption of the original water vapor compressor. At the same time, in view of the characteristics of large specific volume of water vapor and slow air-intake liquid process, the present invention adds an air intake line before the compression chamber to ensure that the partial exhaust of the bypass line 2 plays a full role, so that the gas flowing into the bypass line can be fully mixed with the intake air in the air intake line 7, thereby further overcoming the problem of air-intake liquid.

[0039] The bypass line 2 is provided with a one-way valve 3, and the flow direction of the one-way valve 3 is directed from the first end to the second end. The one-way valve 3 is used to limit the flow direction of water vapor in the bypass line 2, thereby avoiding the occurrence of backflow in the air inlet 11, and effectively ensuring the normal operation of the compressor.

[0040] The bypass pipeline 2 is provided with a flow regulating mechanism. The flow regulating mechanism is used to regulate the water vapor flow in the bypass pipeline 2 to ensure that the compressor can work normally, that is, to ensure that the air intake port can normally inlet steam.

[0041] An exhaust temperature sensor is provided at the exhaust port 12, and the flow regulating mechanism is electrically connected to the exhaust temperature sensor. By detecting the exhaust temperature, water vapor with excessively high temperature is prevented from directly entering the air inlet 11, which would cause the suction temperature of the water vapor compressor to exceed the preset standard and cause damage to related structures.

[0042] As another embodiment, an exhaust pressure sensor is provided at the exhaust port 12, and the flow regulating mechanism is electrically connected to the exhaust pressure sensor. By detecting the temperature of the exhaust gas, water vapor with excessive pressure is prevented from directly entering the air inlet 11, which would cause the suction pressure of the water vapor compressor to exceed a preset standard and cause damage to related structures.

[0043] As another embodiment, an exhaust temperature sensor and an exhaust pressure sensor are provided at the exhaust port 12, and the flow regulating mechanism is electrically connected to the exhaust temperature sensor and the exhaust pressure sensor. By detecting the temperature and pressure of the exhaust gas, water vapor with excessively high temperature and pressure is prevented from directly entering the air inlet 11, which would cause the suction temperature of the water vapor compressor to exceed the preset standard and cause damage to related structures. Long-term high temperature and high pressure will cause key components of the compressor, such as the impeller, to soften and deform, thereby affecting the compression capacity of the compressor.

[0044] like Figure 4 As shown, a spiral flow channel 71 is provided on the inner surface of the intake pipe 7 in the direction from the intake end to the outlet end, and the bypass pipe is connected to the portion of the spiral flow channel 71 close to the intake end. The spiral flow channel 71 can prevent the fully compressed water vapor in the bypass pipe 2 from generating a certain range of idle zone when it just enters the intake pipe 7, and the spiral flow channel 71 can also be used to increase the time for the fully compressed water vapor and the uncompressed water vapor to fully merge, thereby further overcoming the problem of liquid inhalation.

[0045] like Figure 3 As shown, the outlet gas of the bypass pipeline enters the spiral flow channel 71 along the tangent direction of the spiral flow channel 71. The gas of the bypass pipeline is allowed to flow into the spiral flow channel 71 as much as possible, so as to avoid a certain range of idle area when the fully compressed water vapor just enters the intake pipe 7, and the spiral flow channel can be further used to increase the time for the fully compressed water vapor and the uncompressed water vapor to fully merge, so that the effect of inhaling liquid is better and more obvious.

[0046] like Figure 5 As shown, in the direction from the air inlet end to the air outlet end, a heat exchange channel 72 is provided in the inner wall of the air inlet pipeline 7, the end of the heat exchange channel 72 close to the air inlet end is communicated with the bypass pipeline, and the end of the heat exchange channel 72 close to the air outlet end is communicated with the interior of the air inlet pipeline 7. That is, the high-temperature and high-pressure water vapor in the bypass pipeline can first be heat-exchanged with the gas inside the air inlet pipeline 7 in the heat exchange channel 72, and then mixed with the gas in the air inlet pipeline 7 after the heat exchange, thereby further increasing the problem of liquid inhalation.

[0047] The heat exchange flow channel 72 is distributed in a spiral shape with the axis of the intake pipeline 7 as the axis, so as to increase the heat exchange efficiency of the gas in the bypass pipeline to the gas in the intake pipeline 7, so that the gas in the intake pipeline 7 is fully heated.

[0048] The water vapor compressor further includes a return pipe 9, the inlet of which is in communication with the end of the heat exchange channel 72 close to the gas outlet, and the outlet of which is in communication with the gas inlet end of the gas inlet pipe 7. The gas that has completed heat exchange in the heat exchange channel 72 is sent to the gas inlet end of the gas inlet pipe 7 by means of the return pipe 9, so that the gas after heat exchange is fully mixed with the gas in the gas inlet pipe 7, further reducing the presence of liquid in the gas inlet pipe 7, thereby further increasing the problem of overcoming the problem of liquid inhalation.

[0049] The water vapor compressor further includes a first branch 91 and a second branch 92. The outlet of the return line 9 is connected to the air inlet end of the air inlet line 7 through the first branch 91, and the outlet of the return line 9 is connected to the exhaust port through the second branch 92, and valve body assemblies are provided on both the first branch 91 and the second branch 92. When the pressure and / or temperature of the heat-exchanged gas cannot meet the high temperature and high pressure requirements of the compressor exhaust, the heat-exchanged gas is sent to the air inlet line 7 through the first branch 91, but when the pressure and / or temperature of the heat-exchanged gas can meet the high temperature and high pressure requirements of the compressor exhaust, the heat-exchanged gas is directly sent to the exhaust port for discharge using the second branch 92.

[0050] The return pipeline 9 is provided with a detection mechanism, and the valve body assembly of the first branch 91 and the valve body assembly of the second branch 92 are both adjusted according to the detection result of the detection mechanism. The detection mechanism can detect the pressure and / or temperature of the gas in the return pipeline 9, and the valve body assembly on the first branch 91 and the valve body assembly on the second branch 92 can control the opening and closing of the corresponding pipeline according to the aforementioned detected pressure value and / or temperature value.

[0051] The ratio of the length of the air intake pipeline 7 to the inner diameter of the air intake pipeline 7 is in the range of 1:1 to 3:1, preferably 2:1.

[0052] The water vapor compressor further comprises an impeller, and the impeller is arranged in the housing, that is, the water vapor compressor is a centrifugal compressor.

[0053] A water vapor compressor assembly comprises the water vapor compressor mentioned above.

[0054] The water vapor compressor further includes an evaporator 5, the inlet of the evaporator 5 and the outlet of the evaporator 5 are both connected to the bypass line 2, and part or all of the water vapor in the bypass line 2 can flow to the second end after being cooled and / or depressurized in the evaporator 5. The water vapor in the bypass line 2 can be cooled and / or depressurized in the air evaporator 5, and after the cooling and / or depressurization is completed, it enters the air inlet 11 and mixes with the water vapor in the air inlet 11, ensuring that the water vapor entering the air inlet 11 can meet the preset requirements.

[0055] An intake air temperature sensor is provided at the air inlet 11, and an evaporation pipeline switch is provided on the evaporator 5. The evaporation pipeline switch is electrically connected to the intake air temperature sensor. The temperature and / or pressure of the water vapor treated by the evaporator 5 is controlled according to the current water vapor temperature at the air inlet 11, thereby ensuring that the water vapor treated by the evaporator 5 can meet the air intake requirement of the water vapor compressor after mixing with the water vapor at the air inlet 11.

[0056] As another embodiment, an intake pressure sensor is provided at the air inlet 11, and an evaporation pipeline switch is provided on the evaporator 5. The evaporation pipeline switch is electrically connected to the intake pressure sensor. The temperature and / or pressure of the water vapor treated by the evaporator 5 is controlled according to the current water vapor pressure at the air inlet 11, thereby ensuring that the water vapor treated by the evaporator 5 can meet the air intake requirement of the water vapor compressor after mixing with the water vapor at the air inlet 11.

[0057] As another embodiment, an intake air temperature sensor and an intake air pressure sensor are provided at the air inlet 11, and an evaporation pipeline switch is provided on the evaporator 5. The evaporation pipeline switch is electrically connected to the intake air temperature sensor and the intake air pressure sensor. The temperature and / or pressure of the water vapor treated by the evaporator 5 is controlled based on the current water vapor temperature and water vapor pressure at the air inlet 11, thereby ensuring that the water vapor treated by the evaporator 5 can meet the air intake requirement of the water vapor compressor after mixing with the water vapor at the air inlet 11.

[0058] The water vapor compressor further includes a condenser 6, the inlet of the condenser 6 and the outlet of the condenser 6 are both connected to the bypass line 2, and part or all of the water vapor in the bypass line 2 can flow to the second end after being heated and / or pressurized in the condenser 6. The water vapor in the bypass line 2 can enter the condenser 6 for heating and / or pressurization, and after heating and / or pressurization, it is sent to the air inlet 11 to mix with the water vapor at the air inlet 11, ensuring that the water vapor entering the air inlet 11 can meet the preset requirements.

[0059] Since the pressure of the condenser 6 is too high relative to the pressure of the air inlet 11, the exhaust direction of the outlet of the condenser 6 points to the second end to avoid the pressure of the condenser 6 from having an impact on the intake or exhaust of the compressor.

[0060] An intake air temperature sensor is provided at the air inlet 11, and a condensation pipeline switch is provided on the condenser 6. The condensation pipeline switch is electrically connected to the intake air temperature sensor. The temperature and / or pressure of the water vapor treated by the condenser 6 is controlled based on the current water vapor temperature at the air inlet 11, thereby ensuring that the water vapor treated by the condenser 6 can meet the air intake requirement of the water vapor compressor after mixing with the water vapor at the air inlet 11.

[0061] As another embodiment, an intake pressure sensor is provided at the air inlet 11, and a condensation pipeline switch is provided on the condenser 6. The condensation pipeline switch is electrically connected to the intake pressure sensor. The temperature and / or pressure of the water vapor treated by the condenser 6 is controlled based on the current water vapor temperature at the air inlet 11, thereby ensuring that the water vapor treated by the condenser 6 can meet the air intake requirement of the water vapor compressor after mixing with the water vapor at the air inlet 11.

[0062] As another embodiment, an intake air temperature sensor and an intake air pressure sensor are provided at the air inlet 11, and a condensation pipeline switch is provided on the condenser 6. The condensation pipeline switch is electrically connected to the intake air temperature sensor and the intake air pressure sensor. The temperature and / or pressure of the water vapor treated by the condenser 6 is controlled according to the current water vapor temperature at the air inlet 11, so as to ensure that the water vapor treated by the condenser 6 can meet the air intake requirement of the water vapor compressor after mixing with the water vapor at the air inlet 11.

[0063] The water vapor compressor also includes an evaporator 5 and a condenser 6, the inlet of the evaporator 5 and the outlet of the evaporator 5 are both connected to the bypass line 2, and part or all of the water vapor in the bypass line 2 can flow to the second end after cooling and / or reducing pressure in the evaporator 5, and the inlet of the condenser 6 and the outlet of the condenser 6 are both connected to the bypass line 2, and part or all of the water vapor in the bypass line 2 can flow to the second end after heating and / or increasing pressure in the condenser 6. That is, the water vapor compressor is provided with the evaporator 5 and the condenser 6 at the same time, so that the water vapor compressor can adjust the temperature and pressure of the water vapor in the bypass line 2 according to actual needs, thereby ensuring the normal operation of the water vapor compressor.

[0064] Preferably, the communication position between the evaporator 5 and the bypass line 2 is between the connection position between the condenser 6 and the bypass line 2 and the first end of the bypass line 2 .

[0065] An air conditioning unit comprises the above-mentioned water vapor compressor.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A water vapor compressor, characterized in that: include: A shell (1), wherein an air inlet (11) and an air outlet (12) are provided on the shell (1), and a compression chamber is provided inside the shell (1); A bypass pipeline (2), wherein a first end of the bypass pipeline (2) is in communication with the exhaust port (12), and a second end of the bypass pipeline (2) is in communication with the air inlet (11); An air intake pipeline (7), the air intake pipeline (7) having an air intake end and an air outlet end, the air intake end being provided with the air intake port (11), the air outlet end being in communication with the compression chamber, and the distance from the bypass pipeline (2) to the air intake end being shorter than the distance from the bypass pipeline (2) to the air outlet end; In the direction from the air inlet end to the air outlet end, a heat exchange channel (72) is provided in the inner wall of the air inlet pipeline (7), an end of the heat exchange channel (72) close to the air inlet end is in communication with the bypass pipeline (2), and an end of the heat exchange channel (72) close to the air outlet end is in communication with the interior of the air inlet pipeline (7); The water vapor compressor further comprises a return pipeline (9), the inlet of the return pipeline (9) being in communication with the end of the heat exchange flow channel (72) close to the gas outlet, and the outlet of the return pipeline (9) being in communication with the gas inlet end of the gas inlet pipeline (7); The water vapor compressor further comprises a first branch (91) and a second branch (92); the outlet of the return pipeline (9) is connected to the intake end of the intake pipeline (7) via the first branch (91); the outlet of the return pipeline (9) is connected to the exhaust port via the second branch (92); and valve body assemblies are provided on both the first branch (91) and the second branch (92).

2. The water vapor compressor according to claim 1, characterized in that: The bypass pipeline (2) is provided with a one-way valve (3), and the flow direction of the one-way valve (3) is from the first end to the second end.

3. The water vapor compressor according to claim 1, characterized in that: The bypass pipeline (2) is provided with a flow regulating mechanism.

4. The water vapor compressor according to claim 3, characterized in that: An exhaust temperature sensor is provided at the exhaust port (12), and the flow regulating mechanism is electrically connected to the exhaust temperature sensor; or, an exhaust pressure sensor is provided at the exhaust port (12), and the flow regulating mechanism is electrically connected to the exhaust pressure sensor; or, an exhaust temperature sensor and an exhaust pressure sensor are provided at the exhaust port (12), and the flow regulating mechanism is electrically connected to the exhaust temperature sensor and the exhaust pressure sensor.

5. The water vapor compressor according to claim 1, characterized in that: The heat exchange flow channel (72) is distributed in a spiral shape with the axis of the air intake pipeline (7) as the axis.

6. The water vapor compressor according to claim 1, characterized in that: The return pipeline (9) is provided with a detection mechanism, and the valve body assembly of the first branch (91) and the valve body assembly of the second branch (92) are both adjusted according to the detection result of the detection mechanism.

7. The water vapor compressor according to claim 1, characterized in that: The ratio of the length of the air intake pipeline (7) to the inner diameter of the air intake pipeline (7) ranges from 1:1 to 3:

1.

8. The water vapor compressor according to claim 1, characterized in that: The water vapor compressor further comprises an impeller, wherein the impeller is arranged in the casing (1).

9. A water vapor compressor assembly, characterized in that: A water vapor compressor comprising the water vapor compressor according to any one of claims 1 to 8.

10. The water vapor compressor assembly according to claim 9, characterized in that: The water vapor compressor further comprises an evaporator (5), the inlet of the evaporator (5) and the outlet of the evaporator (5) are both connected to the bypass pipeline (2), and part or all of the water vapor in the bypass pipeline (2) can flow to the second end after being cooled and / or depressurized in the evaporator (5).

11. The water vapor compressor assembly according to claim 10, characterized in that: An intake air temperature sensor is provided at the air inlet (11), an evaporation line switch is provided on the evaporator (5), and the evaporation line switch is electrically connected to the intake air temperature sensor; or, an intake air pressure sensor is provided at the air inlet (11), an evaporation line switch is provided on the evaporator (5), and the evaporation line switch is electrically connected to the intake air pressure sensor; or, an intake air temperature sensor and an intake air pressure sensor are provided at the air inlet (11), an evaporation line switch is provided on the evaporator (5), and the evaporation line switch is electrically connected to the intake air temperature sensor and the intake air pressure sensor.

12. The water vapor compressor assembly according to claim 9, characterized in that: The water vapor compressor further comprises a condenser (6), the inlet of the condenser (6) and the outlet of the condenser (6) are both connected to the bypass pipeline (2), and part or all of the water vapor in the bypass pipeline (2) can flow to the second end after being heated and / or pressurized in the condenser (6).

13. The water vapor compressor assembly according to claim 12, characterized in that: The exhaust direction of the outlet of the condenser (6) points to the second end.

14. The water vapor compressor assembly according to claim 12, characterized in that: An intake air temperature sensor is provided at the air inlet (11), a condensation line switch is provided on the condenser (6), and the condensation line switch is electrically connected to the intake air temperature sensor; or, an intake air pressure sensor is provided at the air inlet (11), a condensation line switch is provided on the condenser (6), and the condensation line switch is electrically connected to the intake air pressure sensor; or, an intake air temperature sensor and an intake air pressure sensor are provided at the air inlet (11), a condensation line switch is provided on the condenser (6), and the condensation line switch is electrically connected to the intake air temperature sensor and the intake air pressure sensor.

15. The water vapor compressor assembly according to claim 9, characterized in that: The water vapor compressor further comprises an evaporator (5) and a condenser (6); an inlet of the evaporator (5) and an outlet of the evaporator (5) are both in communication with the bypass pipeline (2), and part or all of the water vapor in the bypass pipeline (2) can flow to the second end after being cooled and / or depressurized in the evaporator (5); an inlet of the condenser (6) and an outlet of the condenser (6) are both in communication with the bypass pipeline (2), and part or all of the water vapor in the bypass pipeline (2) can flow to the second end after being heated and / or pressurized in the condenser (6).

16. An air conditioning unit, characterized in that: The invention comprises the water vapor compressor according to any one of claims 1 to 8 or the water vapor compressor assembly according to any one of claims 9 to 15.

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