Air conditioning system

Abstract

The utility model discloses an air conditioning system, relates to the technical field of air conditioners, and aims to solve the problem of heat exchanger failure caused by poor design of a liquid level sensor communication device. The air conditioning system comprises a heat exchanger and a liquid level detection device. The heat exchanger comprises a shell and a heat exchange tube, and the heat exchange tube is arranged in a cavity of the shell. The liquid level detection device comprises a barrel, a sensor, a gas phase communicating pipe and a liquid phase communicating pipe. A gas phase opening and a liquid phase opening are formed in the length direction of the cylinder body at intervals. The sensor is arranged in the cylinder and provided with a liquid level zero point and a liquid level full point at intervals. And one end of the gas-phase communicating pipe is connected with the shell, and the other end is connected with the gas-phase port. And one end of the liquid-phase communicating pipe is connected with the shell, and the other end is connected with the liquid-phase port. In the length direction of the cylinder, the liquid level full point is located between the gas phase opening and the liquid phase opening, and the problem that a liquid level sensor communication device is poor in design can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field especially relates to a kind of air conditioning system. BACKGROUND

[0002] Due to its efficient heat transfer characteristics, the flooded heat exchanger is often used in air conditioning systems of large shopping malls, data centers, industrial plants and other areas.

[0003] The flooded heat exchanger usually adopts a shell-and-tube design, with one or more pipes placed in a shell filled with liquid. One fluid flows through the pipe, and the other fluid fills the shell, and the fluid in the pipe exchanges heat with the fluid in the shell.

[0004] In order to ensure that the flooded heat exchanger can operate safely and efficiently, it is necessary to monitor the liquid level of the fluid in the shell and adjust it through a throttling device. In order to achieve the purpose of monitoring the liquid level in the shell, the suction superheat is usually used to control the throttling device. However, the design of the throttling device controlled by the suction superheat is complex and unstable. Liquid level sensors are often used instead of superheat control throttling devices. However, the design of the liquid level sensor communication device is not good, which can easily cause the effective range of the liquid level sensor to be not fully utilized or the throttling device to be controlled incorrectly, resulting in heat exchanger failure. SUMMARY

[0005] The embodiments of the present utility model provide an air conditioning system, which solves the problem of insufficient utilization of sensor range and incorrect control of throttling device caused by poor design of liquid level sensor communication device.

[0006] To achieve the above purpose, the embodiments of the present utility model adopt the following technical solutions:

[0007] An air conditioning system includes a shell and a heat exchange pipe. The shell has a cavity, and the heat exchange pipe is arranged in the cavity. The air conditioning system further includes a liquid level detection device, which includes a cylinder, a sensor gas phase communication pipe and a liquid phase communication pipe. The cylinder is provided with a gas phase port and a liquid phase port along the length direction of the cylinder. The sensor is provided with a liquid level zero point and a liquid level full point, and the sensor is arranged in the cylinder. One end of the gas phase communication pipe is connected with the shell, and the other end is connected with the gas phase port. One end of the liquid phase communication pipe is connected with the shell, and the other end is connected with the liquid phase port. In this way, the cylinder of the liquid level detection device can be connected with the shell of the heat exchanger through the gas phase communication pipe and the liquid phase communication pipe.

[0008] The liquid level full point is located between the gas phase port and the liquid phase port in the length direction of the cylinder. In this way, when the liquid level in the cylinder reaches the liquid level full point, the liquid level is located below the gas phase port, avoiding the situation that the liquid level does not reach the sensor liquid level full point, but the gas phase port is filled first, so that the cylinder and the shell cannot be normally connected. Therefore, the situation that the change of the liquid level in the shell cannot be correctly acquired is avoided, and the situation that the air conditioning system fails to operate is avoided.

[0009] In some embodiments of the present application, the distance between the sensor liquid level zero point and the sensor liquid level full point in the length direction of the cylinder of the liquid level detection device is greater than the distance between the bottom of the shell of the heat exchanger and the sensor liquid level full point in the length direction of the cylinder of the liquid level detection device.

[0010] In some embodiments of the present application, one end of the cylinder of the liquid level detection device is provided with an opening, so that the sensor of the liquid level detection device is connected to the cylinder of the liquid level detection device through the opening provided by the cylinder.

[0011] In some embodiments of the present application, the liquid level detection device further comprises a sealing member, which is arranged on the opening of the cylinder of the liquid level detection device, and a part of the sealing member is in communication with the opening. When the sensor of the liquid level detection device is connected to the cylinder of the liquid level detection device, the sealing member abuts between the sensor and the cylinder.

[0012] In some embodiments of the present application, the liquid level detection device further comprises a liquid blocking plate arranged in the cylinder of the liquid level detection device, and the liquid blocking plate comprises a first end and a second end arranged oppositely. The first end of the liquid blocking plate is connected to the inner wall of the cylinder, and the second end of the liquid blocking plate is arranged spaced apart from the inner wall of the cylinder. The first end of the liquid blocking plate is located on the side of the gas phase port of the cylinder close to the liquid phase port.

[0013] In some embodiments of the present application, the liquid blocking plate is provided with a sensor avoiding hole through which the sensor of the liquid level detection device passes. The liquid blocking plate further comprises a sealing member arranged in the sensor avoiding hole of the liquid blocking plate.

[0014] In some embodiments of the present application, the liquid blocking plate is arranged obliquely, and in the length direction of the cylinder, the first end of the liquid blocking plate is closer to the liquid phase port of the cylinder than the second end of the liquid blocking plate.

[0015] In some embodiments of the present application, the liquid blocking plate and the axis of the cylinder form an included angle, and the included angle is 45°-60°.

[0016] In some embodiments of the present application, the gas phase communication pipe comprises a first connecting pipe, a second connecting pipe and a first valve body. One end of the first connecting pipe is connected with the shell, one end of the second connecting pipe is connected with the gas phase port of the cylinder body, the first valve body is connected with the other end of the first connecting pipe, the first valve body is also connected with the other end of the second connecting pipe, and the first connecting pipe and the second connecting pipe are connected through the first valve body. The liquid phase communication pipe comprises a third connecting pipe, a fourth connecting pipe and a second valve body. One end of the third connecting pipe is connected with the shell, one end of the fourth connecting pipe is connected with the liquid phase port of the cylinder body, the second valve body is connected with the other end of the third connecting pipe, the second valve body is also connected with the other end of the fourth connecting pipe, and the third connecting pipe and the fourth connecting pipe are connected through the second valve body.

[0017] In some embodiments of the present application, the liquid level detection device further comprises a gas phase port connector and a liquid phase port connector. One end of the gas phase port connector is connected with the gas phase port of the cylinder body, and the other end of the gas phase port connector is used for connecting with the first connecting pipe. One end of the liquid phase port connector is connected with the liquid phase port of the cylinder body, and the other end of the liquid phase port connector is used for connecting with the third connecting pipe. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic diagram of a heat exchanger provided in some embodiments of the present application;

[0019] Figure 2 A cross-sectional view of the heat exchanger in Figure 1

[0020] A cross-sectional view of the heat exchanger in Figure 3 Figure 1 A cross-sectional view of the heat exchanger in

[0021] Figure 4 Figure 1 An enlarged view of a in

[0022] Figure 5 An enlarged view of b in Figure 4

[0023] A cross-sectional view of the liquid level detection device in Figure 6 Figure 5 An enlarged view of b in

[0024] Figure 7 A schematic diagram of a poor design scheme;

[0025] Figure 8 A further cross-sectional view of the liquid level detection device provided in some embodiments of the present application;

[0026] Figure 9 A schematic diagram of a gas phase communication pipe provided in some embodiments of the present application;

[0027] Figure 10 A schematic diagram of a liquid phase communication pipe provided in some embodiments of the present application;​​​

[0028] Figure 11 A schematic view of a cylinder of a liquid level detection device provided by an embodiment of the present application;

[0029] Figure 12 A schematic view of a sealing member of a liquid level detection device provided by an embodiment of the present application;

[0030] Figure 13 A schematic view of a liquid baffle of a liquid level detection device provided by an embodiment of the present application;

[0031] Figure 14 A schematic view of a sensor avoiding hole of a liquid baffle provided by an embodiment of the present application;

[0032] Figure 15 Another schematic view of a liquid baffle of a liquid level detection device provided by an embodiment of the present application.

[0033] Reference signs: heat exchanger-100; shell-1; cavity-10; heat exchange pipe-11;

[0034] Liquid level detection device-2; cylinder-21; opening-2100; accommodating cavity-20; gas phase port-211; gas phase port connector-2110; liquid phase port-212; liquid phase port connector-2120;

[0035] Sensor-22; liquid level zero point-221; liquid level full point-222;

[0036] Gas phase communication pipe-23; first connecting pipe-231; second connecting pipe-232; first valve body-233; liquid phase communication pipe-24; third connecting pipe-241; fourth connecting pipe-242; second valve body-243;

[0037] Sealing member-3;

[0038] Liquid baffle-4; sensor avoiding hole-40; liquid baffle sealing member-400; first end-41; second end-42;

[0039] First baffle-4101; second baffle-4102. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0041] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0042] The terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0043] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, when describing the pipeline or channel, "connection" and "connection" used in the application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0044] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of the words "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0045] As used herein, "about", "approximately", or "around" includes the stated value and the average value within an acceptable deviation range of the specific value, wherein the acceptable deviation range is determined by the ordinary skilled in the art considering the measurement being discussed and the error related to the measurement of the specific quantity (i.e. the limitation of the measurement system).

[0046] An air conditioning system is a device used to adjust the temperature and humidity of indoor air. The air conditioning system can realize the comfort adjustment of the environment by refrigeration or heating.

[0047] As a kind of heat exchanger, flooded heat exchanger is usually used as a component of condenser or evaporator in air conditioning system.For example, condenser in water chiller.The common design of flooded heat exchanger is to install one or more pipes in a shell filled with liquid.One fluid flows through the pipe, while the other fluid fills the container and exchanges heat with the fluid in the pipe.

[0048] In order to maintain the normal operation of flooded heat exchanger, it is usually necessary to monitor the liquid level in the shell to avoid the lack of liquid, which affects the heat exchange efficiency and even causes equipment damage.

[0049] In order to control and monitor the liquid level in the shell, a throttling device and a monitoring device are usually provided, and the throttling device is controlled according to the parameters of the monitoring device.In the related art, suction superheat is used for control, and the superheat deviation is large in actual application of different containers, such as the actual operation of the suction superheat of flooded heat exchanger, which is generally about 1℃ or even lower, and the fluctuation is small, so that the control precision of the throttling device is poor, the control needs to increase other parameters for assistance, the control design is complex, and periodic wave fluctuation of the throttling device is easy to cause, and the control is unstable.

[0050] With the development of technology, liquid level sensor gradually replaces superheat to control the throttling device adjustment in water chiller, and the liquid level sensor can make the throttling device control more accurate, but the liquid level control of air conditioning unit generally needs to increase an external communication device to measure the actual liquid level in the container, and the poor design of the communication device can easily cause the effective range of the liquid level sensor to be not fully utilized or cause incorrect control of the throttling device, which is easy to cause unit failure and unable to operate.

[0051] In this case, the application provides an air conditioning system, which comprises a heat exchanger. Figure 1 As shown in Figure 1 is a schematic view of heat exchanger 100.The heat exchanger 100 mainly comprises a shell 1, and as shown in Figure 2 As shown in Figure 2 is a cross-sectional view of the heat exchanger, and the shell 1 is provided with a cavity 10 inside.

[0052] Referring to Figure 3 , Figure 3 is another cross-sectional view of the heat exchanger, and the heat exchanger 100 further comprises a heat exchange pipe 11, which is arranged in the cavity 10 of the shell 1.Based on this, one fluid flows in the heat exchange pipe 11, and another fluid is filled in the shell 1, and the fluid filled in the shell 1 exchanges heat with the fluid in the heat exchange pipe 11, and then cooperates with other components of the air conditioning system to complete the refrigeration or heating function.

[0053] It should be noted that the heat exchange tube 11 mentioned above can be one or more tubes installed in the cavity 10 of the shell 1.

[0054] The aforementioned shell-and-tube design is commonly referred to as a flooded heat exchanger, in which one fluid immerses another, transferring heat through direct contact or through heat transfer walls. This design allows for highly efficient heat transfer because the heat exchange between the fluids is unrestricted, resulting in a high heat transfer coefficient.

[0055] Meanwhile, due to its working principle, it is necessary to ensure that the liquid always covers the heat exchange tubes. In order to maintain the normal operation of the system, it is usually necessary to monitor the liquid level in the chamber to avoid insufficient liquid, which would affect the heat exchange efficiency or even cause equipment damage.

[0056] To monitor the liquid level inside the casing, related technologies use a throttling device controlled by intake superheat. However, this throttling device is complex to design and unstable. Other technologies use liquid level sensors as an alternative to superheat-controlled throttling devices. However, poor design of the liquid level sensor's connection device can easily lead to insufficient utilization of the sensor's effective range or incorrect control of the throttling device, resulting in heat exchanger failure.

[0057] To address the aforementioned issues, the air conditioning system provided in this application also includes a liquid level detection device. For example... Figure 4 As shown, Figure 4 for Figure 1 Enlarged view of point a. The liquid level detection device 2 includes a cylinder 21. For example... Figure 5 As shown, Figure 5 for Figure 4 A cross-sectional view of the liquid level detection device. A gas phase port 211 and a liquid phase port 212 are spaced apart along the length of the cylinder 21. A receiving cavity 20 is formed inside the cylinder 21, and both the gas phase port 211 and the liquid phase port 212 communicate with the receiving cavity 20 of the cylinder 21.

[0058] like Figure 6 As shown, Figure 6 for Figure 5 Enlarged view at point b. The liquid level detection device 2 provided in this application also includes a sensor 22, which has a zero liquid level point 221 and a full liquid level point 222 spaced apart along its length. Furthermore, the sensor 22 is disposed in the receiving cavity 20 of the aforementioned cylinder 21, thus enabling it to detect the liquid level within the cylinder 21. The zero liquid level point 221 can also be considered as the zero point of the sensor 22's measurement range, and the full liquid level point can be considered as the maximum value of the sensor 22's measurement range.

[0059] In this case, along the length of the cylinder 21, such as Figure 6As shown, the liquid level full point 222 of the sensor 22 is located between the gas phase port 211 and the liquid phase port 212 of the cylinder 21. In this way, various malfunctions caused by unreasonable design between the cylinder 21 and the sensor 22 can be avoided.

[0060] For example, in some poor design schemes in the related art, the gas phase port 211 of the cylinder 21 is arranged below the liquid level full point 222 of the sensor 22 (see Figure 7 ). In this case, when the liquid level in the heat exchanger 100 is stably operated within the preset liquid level control line, if the working condition fluctuates rapidly, the liquid level detection device 2 causes the liquid level in the cylinder 21 to be inconsistent with the actual liquid level in the shell 1 of the heat exchanger due to pressure change, thereby causing the air conditioning system to malfunction.

[0061] For example, when the liquid level in the shell 1 of the heat exchanger is stably operated within the preset liquid level control line, the pressure in the shell 1 is stable as P1, at this time, the water temperature in the shell 1 suddenly decreases, the pressure in the shell 1 rapidly decreases as P2 (P1>P2), and at the same time, because the water temperature decreases, the cooling effect becomes better, and the refrigerant liquid level in the shell 1 rises.

[0062] Because the refrigerant above the preset liquid level control line in the cylinder 21 is in a gaseous state before the water temperature decreases, the pressure thereof is also P1, and because the pressure in the shell 1 decreases as P2 due to the decrease of the water temperature, the pressure of the closed gaseous refrigerant above the preset liquid level control line in the cylinder 21 is P1, and because P1>P2, the liquid level in the cylinder 21 decreases, thereby causing the liquid levels in the cylinder 21 and the shell 1 to be inconsistent.

[0063] The refrigerant in the cylinder 21 is too low to reach the preset liquid level control line, and the controller controls the throttling valve to be closed, but in fact, the liquid level in the shell 1 has risen because the cooling effect becomes better due to the decrease of the water temperature, thereby causing the evaporator to lack refrigerant, and the throttling valve is closed to cause the evaporator to have less refrigerant, which may cause the unit to malfunction and fail to operate.

[0064] The liquid level detection device 2 provided in the present application has the liquid level full point 222 located between the gas phase port 211 and the liquid phase port 212 in the length direction of the cylinder 21. It can be understood that the liquid level full point 222 is located between the gas phase port 211 and the liquid phase port 212 in the length direction of the cylinder 21, that is, the gas phase port 211 of the cylinder 21 is arranged above the liquid level full point 222. Therefore, within the effective range of the sensor, the gas phase part of the cylinder 21 can always communicate with the gas phase part in the shell 1, thereby ensuring that the liquid level change in the shell 1 can be correctly reflected, and malfunctions can be avoided.

[0065] As shown in Figure 8As shown, in some embodiments of the present application, the distance H1 between the liquid level zero point 221 of the sensor 22 and the liquid level full point 222 of the sensor 22 in the length direction of the cylinder 21 of the liquid level detection device 2 is greater than the distance H2 between the bottom of the shell 1 of the heat exchanger and the liquid level full point 222 of the sensor 22, i.e. H1>H2.

[0066] That is, the liquid level zero point 221 provided on the sensor 22 should not be higher than the bottom position of the shell 1 to ensure that the lowest liquid level in the shell 1 is detected. The liquid level zero point 221 of the sensor 22 can ensure that the lowest point of the liquid level in the shell 1 is detected.

[0067] On this basis, in order to reflect the liquid level height in the shell 1 of the heat exchanger 100 through the cylinder 21 and the sensor 22 provided in the cylinder 21, the liquid level detection device 2 provided by the present application further comprises a gas phase communication pipe 23 and a liquid phase communication pipe 24. Figure 5

[0068] The one end of the gas phase communication pipe 23 is connected with the shell 1 of the heat exchanger, and the other end of the gas phase communication pipe 23 is connected with the gas phase port 211 of the cylinder 21 of the liquid level detection device. In this way, the gas phase port 211 of the cylinder 21 of the liquid level detection device can be connected with the inside of the shell 1 of the heat exchanger through the gas phase communication pipe 23.

[0069] Further, the one end of the liquid phase communication pipe 24 is connected with the shell 1 of the heat exchanger, and the other end of the liquid phase communication pipe 24 is connected with the liquid phase port 212 of the cylinder 21 of the liquid level detection device. In this way, the liquid phase port 212 of the cylinder 21 of the liquid level detection device can be connected with the inside of the shell 1 of the heat exchanger through the liquid phase communication pipe 24.

[0070] It should be noted that the shell 1 of the heat exchanger is connected with the cylinder 21 of the liquid level detection device through the gas phase communication pipe 23 and the liquid phase communication pipe 24 to form a communication device of the shell 1, and then the liquid level in the shell 1 of the heat exchanger is reflected through the sensor 22 provided in the cylinder 21. According to the design of the heat exchanger, the appropriate container preset liquid level control line is confirmed, and the actual liquid level detected by the sensor 22 is compared with the preset liquid level control line to adjust the throttling device in the system, so as to achieve the purpose of controlling the throttling device through the liquid level.

[0071] As can be seen from the above, the gas phase port 211 and the liquid phase port 212 of the cylinder 21 of the liquid level detection device are respectively connected with the inside of the shell 1 of the heat exchanger through the gas phase communication pipe 23 and the liquid phase communication pipe 24, so that the liquid level in the shell of the heat exchanger can be indirectly reflected through the liquid level in the cylinder, and the sensor 22 provided in the cylinder 21 can accurately obtain the liquid level change. Further, the throttling device increases or reduces the fluid injected into the shell 1 according to the liquid level change.​

[0072] The gas connection pipe 23 and the liquid connection pipe 24 will be further explained below.

[0073] like Figure 9 As shown, the air connection pipe 23 includes a first connection pipe 231, one end of which is connected to the housing 1.

[0074] The gas connection pipe 23 also includes a second connection pipe 232, one end of which is connected to the gas port 211 of the cylinder 21.

[0075] The gas connection pipe 23 also includes a first valve body 233, which is connected to the other end of the first connecting pipe 231 and also to the other end of the second connecting pipe 232. The first connecting pipe 231 and the second connecting pipe 232 are connected through the first valve body 233.

[0076] like Figure 10 As shown, the liquid connection pipe 24 includes a third connection pipe 241, one end of which is connected to the housing 1.

[0077] The liquid connection pipe 24 also includes a fourth connection pipe 242, one end of which is connected to the liquid phase port 212 of the cylinder 21.

[0078] The liquid connection pipe 24 also includes a second valve body 243, which is connected to the other end of the third connection pipe 241 and also to the other end of the fourth connection pipe 242. The third connection pipe 241 and the fourth connection pipe 242 are connected through the second valve body 243.

[0079] In this way, the cylinder 21 and the shell 1 are connected through the first connecting pipe 231, the second connecting pipe 232, the third connecting pipe 241 and the fourth connecting pipe 242, as well as the first valve body 233 and the second valve body 243.

[0080] The first valve body 233, connected between the first connecting pipe 231 and the second connecting pipe 232, can be closed or opened to control the flow between the first connecting pipe 231 and the second connecting pipe 232. Similarly, the second valve body 243, connected between the third connecting pipe 241 and the fourth connecting pipe 242, can be closed or opened to control the flow between the third connecting pipe 241 and the fourth connecting pipe 242.

[0081] Therefore, when it is necessary to inspect or replace the cylinder 21 of the liquid level detection device 2 or the sensor 22 installed in the cylinder 21, the first valve body 233 and the second valve body 243 can be closed to ensure the sealing state of the housing 1 and ensure the safety of the heat exchanger 100.

[0082] like Figure 9 As shown, in some embodiments, the liquid level detection device 2 provided in this application also includes a gas phase port connector 2110, one end of which is connected to the gas phase port 211 of the cylinder 21, and the other end of which is used to connect to the first connecting pipe 231.

[0083] like Figure 10 As shown, the liquid level detection device 2 provided in this application embodiment also includes a liquid phase port connector 2120. One end of the liquid phase port connector 2120 is connected to the liquid phase port 212 of the cylinder 21, and the other end of the liquid phase port connector 2120 is used to connect to the third connecting pipe 241.

[0084] In some embodiments of this application, such as Figure 11 As shown, one end of the cylinder 21 of the liquid level detection device 2 is provided with an opening 2100 so that the sensor 22 of the liquid level detection device 2 can be connected to the inside of the cylinder 21 of the liquid level detection device 2 through the opening 2100 provided in the cylinder 21.

[0085] The opening 2100 is connected to the receiving cavity of the cylinder 21 so that the sensor 22 can extend into the receiving cavity of the cylinder 21 through the opening 2100.

[0086] Furthermore, the inner wall of the opening 2100 is also threaded, and the portion of the sensor 22 placed in the opening 2100 is also threaded. In this way, the sensor 22 and the cylinder 21 can be connected via the thread at the opening 2100, allowing the sensor 22 to be stably positioned within the cylinder 21, thereby ensuring accurate measurement of liquid level changes.

[0087] Based on this, such as Figure 12 As shown, in some embodiments of this application, the liquid level detection device 2 provided in this application further includes a sealing member 3. The sealing member 3 is disposed over the opening 2100 of the cylinder 21 of the liquid level detection device 2, and part of the sealing member 3 communicates with the opening 2100. When the sensor 22 of the liquid level detection device 2 is connected inside the cylinder 21 of the liquid level detection device 2, the sealing member 3 abuts against the space between the sensor 22 and the cylinder 21.

[0088] In this way, when the sensor 22 is tightened to the opening 2100 of the cylinder 21, the sealing element 3 set between the cylinder 21 and the sensor 22 can abut against the cylinder 21 and the sensor 22, so as to avoid gaps between the cylinder 21 and the sensor 22, which would result in poor airtightness of the cylinder 21 and affect the measurement results.

[0089] In some embodiments of this application, such as Figure 13As shown, the liquid level detection device 2 provided by the present application further comprises a liquid blocking plate 4. The liquid blocking plate 4 is arranged in the cylinder body 21 of the liquid level detection device 2, and the liquid blocking plate 4 comprises a first end 41 and a second end 42 arranged oppositely. The first end 41 of the liquid blocking plate 4 is connected with the inner wall of the cylinder body 21, and the second end 42 of the liquid blocking plate 4 is arranged spacedly from the inner wall of the cylinder body 21.

[0090] In this way, the liquid in the cylinder body 21 can be prevented from overflowing into the gas phase port 211, and the normal communication between the cylinder body 21 and the shell 1 can be ensured.

[0091] In some embodiments, the liquid blocking plate 4 is arranged obliquely, and in the length direction of the cylinder body 21, the first end 41 of the liquid blocking plate 4 is closer to the liquid phase port 212 of the cylinder body 21 than the second end 42 of the liquid blocking plate 4. The first end 41 of the liquid blocking plate 4 is located on the side of the gas phase port 211 of the cylinder body 21 close to the liquid phase port 212, that is, the liquid blocking plate 4 is arranged obliquely in the cylinder body 21, wherein the first end 41 of the liquid blocking plate 4 is located below the gas phase port 211, and the second end 42 of the liquid blocking plate 4 is located above the liquid phase port 212.

[0092] In this way, the first end 41 of the liquid blocking plate 4 is located below the gas phase port 211 and connected with the cylinder body 21. The liquid blocking plate 4 is arranged obliquely, the second end 42 of the liquid blocking plate 4 is located above the gas phase port 211 and arranged spacedly from the cylinder body 21, so that the liquid in the cylinder body 21 can be prevented from overflowing into the gas phase port 211. In some embodiments, the liquid blocking plate 4 and the axis of the cylinder body 21 form an included angle, and the included angle is 45°-60°.

[0093] Since the liquid blocking plate 4 is arranged below the gas phase port 211, even if the liquid level in the cylinder body 21 is already flush with or higher than the gas phase port 211. Due to the presence of the liquid blocking plate 4, the liquid cannot enter the gas phase port 211, and the gas phase part of the shell and the cylinder body 21 of the heat exchanger can always be kept in communication, so that the change of the liquid level in the cylinder body 21 can be accurately reflected.

[0094] As shown in the drawings, Figure 14 The liquid blocking plate 4 is further provided with a sensor avoiding hole 40, so that the sensor 22 arranged in the cylinder body 21 can pass through. The interference between the liquid blocking plate 4 and the sensor 22 is avoided, and the liquid level detection device 2 can keep normal work under the condition of arranging the liquid blocking plate 4.

[0095] On this basis, the sensor avoiding hole 40 of the liquid blocking plate 4 is further provided with a liquid blocking plate sealing member 400. The liquid blocking plate sealing member 400 is arranged in the sensor avoiding hole 40 of the liquid blocking plate 4.

[0096] In this way, the liquid baffle 4 is provided with a sensor avoiding hole 40 through which the sensor 22 passes. The sensor avoiding hole 40 is further provided with a liquid baffle sealing piece 400, which can avoid a gap between the sensor 22 and the sensor avoiding hole 40 of the liquid baffle 4, thereby avoiding liquid overflowing from the gap between the sensor 22 and the sensor avoiding hole 40. The liquid below the liquid baffle 4 is ensured not to enter the gas phase port 211. The liquid baffle 4 can improve the fault tolerance of the liquid level detection device provided by the present application, that is, even if the position selection between the sensor 22 and the gas phase port 211 of the cylinder 21 is wrong or the model selection of the cylinder 21 is wrong, within a certain range, the liquid baffle 4 can ensure the normal work of the liquid level detection device.

[0097] In some embodiments, as shown in Figure 15 The liquid baffle 4 can also be provided in an L shape, including a first baffle 4101 and a second baffle 4102, which are vertically arranged. The first baffle 4101 is connected to the cylinder 21 and located below the gas phase port 211, and the second baffle 4102 is arranged in a spaced manner with the cylinder 21. In this way, the gas phase port 211 and the liquid in the cylinder 21 can be separated, thereby avoiding the liquid level in the cylinder 21 being too high to cause the cylinder 21 and the shell 1 to be unable to normally communicate.

[0098] Although the present application is described herein in conjunction with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from an inspection of the drawings, the disclosure, and the appended claims. The word “comprising” does not exclude other components or steps not listed in the claims. The word “a” or “an” does not exclude a plurality. A single processor or other unit can fulfill the functions of several means recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to an advantage.

[0099] Although the present application is described herein in conjunction with specific features and embodiments thereof, it is obvious that modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the description and drawings are to be regarded simply as illustrative of the present application as defined by the appended claims, and are to be construed in accordance with the full breadth allowed by the patent laws. It is to be understood that all the modifications, equivalents, and alternatives falling within the scope of the present application take precedence over the specific examples shown and described herein. Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims and their equivalents, they are intended to be included therein.

[0100] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air conditioning system, characterized by, The air conditioning system comprises: a heat exchanger comprising: a shell provided with a cavity; a heat exchange tube arranged in the cavity; a liquid level detection device comprising: a cylinder body provided with a gas phase port and a liquid phase port at intervals along the length direction of the cylinder body; a sensor provided at intervals with a liquid level zero point and a liquid level full point, the sensor being arranged in the cylinder body; a gas phase communication pipe, one end of which is connected to the shell and the other end of which is connected to the gas phase port; a liquid phase communication pipe, one end of which is connected to the shell and the other end of which is connected to the liquid phase port; in the length direction of the cylinder body, the liquid level full point is located between the gas phase port and the liquid phase port.

2. The air conditioning system according to claim 1, wherein in the length direction of the cylinder body of the liquid level detection device, the distance between the liquid level zero point of the sensor and the liquid level full point of the sensor is greater than in the length direction of the cylinder body of the liquid level detection device, the distance between the bottom of the shell of the heat exchanger and the liquid level full point of the sensor.

3. The air conditioning system according to claim 1, wherein one end of the cylinder body of the liquid level detection device is provided with an opening, so that the sensor of the liquid level detection device is connected to the cylinder body of the liquid level detection device through the opening provided in the cylinder body.

4. The air conditioning system of claim 3, wherein, The liquid level detection device further comprises: a sealing member arranged on the opening of the cylinder body of the liquid level detection device, the sealing member being in communication with the opening, and when the sensor of the liquid level detection device is connected to the cylinder body of the liquid level detection device, the sealing member abuts between the sensor and the cylinder body.

5. The air conditioning system of claim 1, wherein, The liquid level detection device further comprises: a liquid blocking plate arranged in the cylinder body of the liquid level detection device, the liquid blocking plate comprising a first end and a second end arranged oppositely; the first end of the liquid blocking plate is connected to the inner wall of the cylinder body, and the second end of the liquid blocking plate is arranged at intervals with the inner wall of the cylinder body; wherein the first end of the liquid blocking plate is located on the side of the gas phase port of the cylinder body close to the liquid phase port.

6. The air conditioning system according to claim 5, wherein the liquid blocking plate is provided with a sensor avoiding hole to allow the sensor of the liquid level detection device to pass through; the sensor avoiding hole is further provided with a liquid blocking plate sealing member arranged in the sensor avoiding hole of the liquid blocking plate.

7. The air conditioning system according to claim 5, wherein the liquid blocking plate is arranged obliquely, and in the length direction of the cylinder body, the first end of the liquid blocking plate is closer to the liquid phase port of the cylinder body than the second end of the liquid blocking plate.

8. The air conditioning system according to claim 7, wherein the liquid blocking plate and the axis of the cylinder body have an included angle of 45°-60°.

9. The air conditioning system according to claim 1, wherein the gas phase communication pipe comprises: a first connecting pipe, one end of which is connected to the shell; a second connecting pipe, one end of which is connected to the gas phase port of the cylinder body; A first valve body is connected with the other end of the first connecting pipe, and also connected with the other end of the second connecting pipe, and the first connecting pipe and the second connecting pipe are connected through the first valve body; The liquid-phase connecting pipe comprises: A third connecting pipe is connected with the shell at one end; A fourth connecting pipe is connected with the liquid-phase port of the cylinder at one end; A second valve body is connected with the other end of the third connecting pipe, and also connected with the other end of the fourth connecting pipe, and the third connecting pipe and the fourth connecting pipe are connected through the second valve body.

10. The air conditioning system of claim 9, wherein The liquid level detection device further comprises: A gas-phase port connector is connected with the gas-phase port of the cylinder at one end, and the other end is used for connecting with the first connecting pipe; A liquid-phase port connector is connected with the liquid-phase port of the cylinder at one end, and the other end is used for connecting with the third connecting pipe.

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