CN211625793U

CN211625793U - Air conditioning unit with function of cleaning non-condensable gas

Info

Publication number: CN211625793U
Application number: CN201922294727.6U
Authority: CN
Inventors: 周堂; 张治平; 刘华; 钟瑞兴; 周宇
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-10-02
Anticipated expiration: 2029-12-18

Abstract

The utility model provides an air conditioning unit with clean noncondensable gas function. Air conditioning unit includes evaporimeter, condenser and clean structure, clean structural entry, gas vent and the liquid mouth of returning that is provided with, be provided with the gaseous state export on the condenser, the gaseous state export with the entry intercommunication, return the liquid mouth with the evaporimeter intercommunication, gas vent and external intercommunication, and the mist in the condenser is in form liquid refrigerant and gaseous noncondensable gas after the separation in the clean structure. The utility model provides an air conditioning unit with clean noncondensable gas function utilizes clean structure to separate noncondensable gas and refrigerant according to the liquefaction condition difference, flows back liquefied refrigerant to the unit to outside the noncondensable gas discharge unit with the gaseous state, the on-off control who matches air intake valve, discharge valve and liquid return valve again reaches the clean purpose of noncondensable gas of system, effectively improves unit reliability and performance, guarantees unit operational reliability.

Description

Air conditioning unit with function of cleaning non-condensable gas

Technical Field

The utility model relates to a refrigerant heat transfer device technical field, especially an air conditioning unit with clean noncondensable gas function.

Background

In a centrifugal water-cooling water chilling unit system with a negative pressure working medium, due to the physical characteristics of the negative pressure working medium, an evaporator is in a negative pressure state in the operation process of the unit, and due to the defects of unit manufacturing, process and the like, outside air can be inevitably leaked into the evaporator to cause air to be mixed into the refrigeration working medium, so that the performance of the unit is reduced, the air entering a refrigerant system is compressed by a compressor and enters a condenser, however, in the condenser, the gaseous refrigeration working medium exchanges heat with cooling water and is condensed into the liquid refrigeration working medium, and the air mixed into the system can not be condensed under the pressure of the condenser and the temperature of the cooling water to become non-condensable gas in the system. After the unit runs for a long time, the non-condensable gas is accumulated on the upper part of the condenser more and more, and cannot be discharged out of the system, so that the condensing pressure of the unit is gradually increased, and the reliability and the performance of the unit are seriously influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the performance of the unit is affected because the non-condensable gas does not participate in heat exchange in the prior art, the air conditioning unit which separates the non-condensable gas from the refrigerant according to different liquefaction conditions and has the function of cleaning the non-condensable gas is provided.

The utility model provides an air conditioning unit, includes evaporimeter, condenser and clean structure, clean structural entry, gas vent and the liquid mouth of returning that is provided with, be provided with the gaseous state export on the condenser, the gaseous state export with the entry intercommunication, return the liquid mouth with the evaporimeter intercommunication, gas vent and external intercommunication, and the mist in the condenser is in form liquid refrigerant and gaseous noncondensable gas in the clean structure after the separation, liquid refrigerant passes through the liquid mouth that returns gets into the evaporimeter, gaseous noncondensable gas by the gas vent is discharged clean structure.

The entrance is provided with gets the pneumatic valve, exhaust port department is provided with discharge valve, liquid return port department is provided with the liquid return valve, and when getting the pneumatic valve and opening, the condenser with clean structure intercommunication when discharge valve opens, clean structure and external intercommunication when the liquid return valve is opened, clean structure with the evaporimeter intercommunication.

Be provided with baffle and heat exchange tube in the evaporimeter, the baffle will relative sealed condensation chamber and evaporation chamber are separated into to the evaporimeter, the condensation chamber forms clean structure, and part the heat exchange tube set up in the evaporation chamber, the remainder the heat exchange tube set up in the condensation intracavity.

The shape of the partition plate is the same as the cross-sectional shape of the evaporator, and the edge of the partition plate is hermetically arranged with the inner surface of the evaporator.

The heat exchange tube is arranged in the through hole, and the heat exchange tube and the through hole are arranged in a sealing mode.

The clean structure including clean jar and pressurization mechanism, the entry the gas vent with return the liquid mouth all set up with on the clean jar, pressurization mechanism set up in the entry with between the gaseous state export, and to by the gaseous state export flows to the mist in the clean jar pressurizes.

The pressurizing mechanism is a high-pressure pump.

The gaseous outlet is arranged above the liquid level in the condenser.

And a liquid collecting bag is arranged at the liquid return port.

The air conditioning unit further comprises a pressure sensor, the pressure sensor detects the condensing pressure of the air conditioning unit, and the pressure sensor is electrically connected with the cleaning structure.

The air conditioning unit is a negative pressure centrifugal water chilling unit.

The utility model provides an air conditioning unit with clean noncondensable gas function utilizes clean structure to separate noncondensable gas and refrigerant according to the liquefaction condition difference, flows back liquefied refrigerant to the unit to outside the noncondensable gas discharge unit with the gaseous state, the on-off control who matches air intake valve, discharge valve and liquid return valve again reaches the clean purpose of noncondensable gas of system, effectively improves unit reliability and performance, guarantees unit operational reliability.

Drawings

Fig. 1 is a schematic structural diagram of an air conditioning unit according to an embodiment of the present invention, which has a function of cleaning non-condensable gas;

fig. 2 is another schematic structural diagram of an air conditioning unit according to an embodiment of the air conditioning unit with a function of cleaning non-condensable gas provided by the present invention;

in the figure:

1. an evaporator; 2. a condenser; 3. cleaning the structure; 31. an inlet; 32. an exhaust port; 33. a liquid return port; 21. a gaseous outlet; 11. a partition plate; 12. a heat exchange pipe; 13. a condensation chamber; 14. an evaporation chamber; 34. cleaning the tank; 35. a pressurizing mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In a centrifugal water-cooling water chilling unit system with a negative pressure working medium, due to the physical characteristics of the negative pressure working medium, in the operation process of the unit, the pressure value Pe of an evaporator in a compressor is smaller than the pressure value Pc of an atmospheric pressure Po and smaller than the pressure value Pc of a condenser, namely, in the operation process, air enters the evaporator due to manufacturing, process defects and the like, and finally is compressed and gathered above the condenser together with a gaseous working medium through the compressor, so that the condensation pressure of the unit is increased, and the reliability and the performance of the unit are influenced.

In order to solve the above problems, the air conditioning unit shown in fig. 1 includes an evaporator 1, a condenser 2 and a cleaning structure 3, the cleaning structure 3 is provided with an inlet 31, an exhaust port 32 and a liquid return port 33, the condenser 2 is provided with a gaseous outlet 21, the gaseous outlet 21 is communicated with the inlet 31, the liquid return port 33 is communicated with the evaporator 1, the exhaust port 32 is communicated with the outside, and the mixed gas in the condenser 2 is separated in the cleaning structure 3 to form a liquid refrigerant and a gaseous non-condensable gas, the liquid refrigerant enters the evaporator 1 through the liquid return port 33, the gaseous non-condensable gas is discharged from the exhaust port 32 to the cleaning structure 3, the mixture of the refrigerant and the non-condensable gas is separated according to different liquefaction conditions by using the cleaning structure 3, so as to achieve the purpose of cleaning the system non-condensable gas, the reliability and the performance of the unit are effectively improved, and the operational reliability of the unit is ensured.

Wherein the volume of the cleaning structure 3 is proportional to the volume of the unit.

The department of entry 31 is provided with gets the pneumatic valve, gas vent 32 department is provided with discharge valve, liquid return port 33 department is provided with the liquid return valve, and when getting the pneumatic valve and opening, condenser 2 with clean structure 3 intercommunication when discharge valve opens, clean structure 3 communicates with the external world clean structure 3 with when the liquid return valve is opened, clean structure 3 with evaporimeter 1 intercommunication, through getting the on-off control of pneumatic valve, discharge valve and liquid return valve, realize that the mist gets into clean structure 3, will not condense the function that gas discharged, retrieve the refrigerant.

Be provided with baffle 11 and heat exchange tube 12 in the evaporimeter 1, baffle 11 will evaporimeter 1 separates into relative sealed condensation chamber 13 and evaporation chamber 14, condensation chamber 13 forms clean structure 3, and part heat exchange tube 12 set up in the evaporation chamber 14, the remainder heat exchange tube 12 set up in the condensation chamber 13, use refrigerated water and the mist that gets into in the heat exchange tube 12 to carry out the heat transfer, utilize noncondensable gas and refrigerant liquefaction temperature difference to liquefy the refrigerant, with noncondensable gas discharge system, refrigerating system is retrieved to the liquid working medium after the condensation to reach the clean purpose of noncondensable gas of system, improve unit reliability and performance, and the liquid refrigerant in the unit normally evaporates in evaporation chamber 14.

The shape of the partition plate 11 is the same as the cross-sectional shape of the evaporator 1, and the edge of the partition plate 11 and the inner surface of the evaporator 1 are arranged in a sealing manner, that is, the partition plate 11 and one end of the evaporator 1 enclose a cleaning structure 3 together, so that the complexity of the internal structure of the evaporator 1 is reduced.

The heat exchange tube 12 is arranged in the through hole, the heat exchange tube 12 and the through hole are arranged in a sealing manner, namely the condensation cavity 13 and the evaporation cavity 14 are distributed along the axis of the heat exchange tube 12, the arrangement mode of the heat exchange tube 12 in the existing evaporator 1 is not required to be changed, and only the partition plate 11 is required to be additionally arranged inside.

As shown in fig. 2, the cleaning structure 3 includes a cleaning tank 34 and a pressurizing mechanism 35, the inlet 31, the exhaust port 32 and the liquid return port 33 are all disposed on the cleaning tank 34, the pressurizing mechanism 35 is disposed between the inlet 31 and the gaseous outlet 21, and pressurizes the mixed gas flowing from the gaseous outlet 21 into the cleaning tank 34, so that the refrigerant in the mixed gas is liquefied without liquefying the non-condensable gas, thereby achieving the separation purpose.

The pressurizing mechanism 35 is a high-pressure pump.

The gas outlet 21 is arranged above the liquid level in the condenser 2, preferably, the gas outlet 21 is located at the highest point of the condenser 2, so as to ensure that more non-condensable gas is discharged into the cleaning structure 3 for separation.

And a liquid collecting bag is arranged at the liquid return port 33, so that the liquid working medium is effectively recovered.

Air conditioning unit still includes pressure sensor, pressure sensor detects air conditioning unit's condensing pressure, just pressure sensor with clean structure 3 electricity is connected, through the real-time condensing pressure of comparison air conditioning unit and air conditioning unit's rated condensing pressure, controls clean structure 3's operating condition, and when real-time condensing pressure is greater than rated condensing pressure, clean structure 3 begins work, and until real-time condensing pressure drop to reasonable scope (equal to rated condensing pressure for optimal state), clean structure 3 stops work.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The air conditioning unit is characterized by comprising an evaporator (1), a condenser (2) and a cleaning structure (3), wherein an inlet (31), an exhaust port (32) and a liquid return port (33) are formed in the cleaning structure (3), a gaseous outlet (21) is formed in the condenser (2), the gaseous outlet (21) is communicated with the inlet (31), the liquid return port (33) is communicated with the evaporator (1), the exhaust port (32) is communicated with the outside, mixed gas in the condenser (2) forms liquid refrigerant and gaseous noncondensable gas after separation in the cleaning structure (3), the liquid refrigerant enters the evaporator (1) through the liquid return port (33), and the gaseous noncondensable gas is discharged from the exhaust port (32) to the cleaning structure (3).

2. Air conditioning assembly according to claim 1, characterized in that: the utility model discloses a condenser, including entry (31), gas vent (32), liquid return port (33), condenser (2), clean structure (3), the department of entry (31) is provided with the air valve of getting, gas vent (32) department is provided with discharge valve, liquid return port (33) department is provided with the liquid return valve, and when getting the air valve and opening, condenser (2) with clean structure (3) intercommunication when discharge valve opens, clean structure (3) and external intercommunication when the liquid return valve is opened, clean structure (3) with evaporimeter (1) intercommunication.

3. Air conditioning assembly according to claim 1, characterized in that: be provided with baffle (11) and heat exchange tube (12) in evaporimeter (1), baffle (11) will evaporimeter (1) is separated into relative sealed condensation chamber (13) and evaporation chamber (14), condensation chamber (13) form clean structure (3), and part heat exchange tube (12) set up in evaporation chamber (14), the remainder heat exchange tube (12) set up in condensation chamber (13).

4. An air conditioning assembly according to claim 3, wherein: the shape of the partition plate (11) is the same as the cross-sectional shape of the evaporator (1), and the edge of the partition plate (11) is hermetically arranged with the inner surface of the evaporator (1).

5. Air conditioning assembly according to claim 4, characterized in that: the heat exchange tube is characterized in that a through hole is formed in the partition plate (11), the heat exchange tube (12) penetrates through the through hole, and the heat exchange tube (12) and the through hole are arranged in a sealing mode.

6. Air conditioning assembly according to claim 1, characterized in that: the cleaning structure (3) comprises a cleaning tank (34) and a pressurizing mechanism (35), the inlet (31), the exhaust port (32) and the liquid return port (33) are arranged on the cleaning tank (34), the pressurizing mechanism (35) is arranged between the inlet (31) and the gaseous outlet (21) and pressurizes mixed gas flowing from the gaseous outlet (21) into the cleaning tank (34).

7. Air conditioning assembly according to claim 6, characterized in that: the pressurizing mechanism (35) is a high-pressure pump.

8. Air conditioning assembly according to claim 1, characterized in that: the gaseous outlet (21) is arranged above the liquid level in the condenser (2).

9. Air conditioning assembly according to claim 1, characterized in that: a liquid collecting bag is arranged at the liquid return port (33).

10. Air conditioning assembly according to claim 1, characterized in that: the air conditioning unit further comprises a pressure sensor, the pressure sensor detects the condensation pressure of the air conditioning unit, and the pressure sensor is electrically connected with the cleaning structure (3).

11. Air conditioning assembly according to claim 1, characterized in that: the air conditioning unit is a negative pressure centrifugal water chilling unit.