Heat exchanger structure and air conditioning system

Abstract

The utility model provides a heat exchanger structure and an air conditioning system. One end of the first heat exchange pipeline communicates with a liquid outlet of the heat exchanger, and the other end of the first heat exchange pipeline is connected with the indoor unit system; the first heat exchange pipeline is provided with a first throttling component used for controlling the opening degree of the first heat exchange pipeline and a first temperature detector used for detecting the temperature of fluid in the first heat exchange pipeline. One end of the second heat exchange pipeline communicates with a liquid outlet of the heat exchanger, and the other end of the second heat exchange pipeline is connected with the indoor unit system; the second heat exchange pipeline is provided with a second throttling component used for controlling the opening degree of the second heat exchange pipeline and a second temperature detector used for detecting the temperature of fluid in the second heat exchange pipeline. The heat exchanger structure solves the technical problem that the damage condition of the throttling component of the heat exchanger cannot be found easily.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger structure and an air-conditioning system. Background Art

[0002] To ensure uniform liquid distribution between the upper and lower layers of the outdoor heat exchanger and maximize the heat exchange efficiency of the heat exchanger, some have proposed using multiple throttling components to independently control the refrigerant flow rate for the upper and lower layers of the same heat exchanger. However, during operation, it was found that if the throttling component is damaged (stuck or out of control), the system will still operate normally and will not be able to identify and detect it and issue a fault warning. However, if the throttling component damage is not discovered in time, it will lead to the inability to accurately control the amount of refrigerant in different areas of the outdoor heat exchanger. The problem of uneven refrigerant distribution within the heat exchanger will still occur, thereby affecting the heat exchange efficiency of the heat exchanger, and thus defeating the purpose of setting up multiple throttling components for independent control.

[0003] However, there is currently no effective self-inspection method for damaged multi-throttling components of outdoor heat exchangers, which can quickly discover the problem and choose to replace new components in time, thereby affecting the throttling components from being able to play their role and affecting the improvement of the heat exchange efficiency of the heat exchanger.

[0004] Therefore, the prior art needs to be further developed. Utility Model Content

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a heat exchanger structure and an air-conditioning system to solve the technical problem in the related art that damage to the throttling component of the heat exchanger is not easy to be discovered.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: a heat exchanger structure is provided, which includes: a heat exchanger; a first heat exchange pipeline, one end of the first heat exchange pipeline is connected to the liquid outlet of the heat exchanger, and the other end of the first heat exchange pipeline is connected to the indoor unit system; the first heat exchange pipeline is provided with a first throttling component for controlling the opening of the first heat exchange pipeline and a first temperature detector for detecting the temperature of the fluid in the first heat exchange pipeline; a second heat exchange pipeline, one end of the second heat exchange pipeline is connected to the liquid outlet of the heat exchanger, and the other end of the second heat exchange pipeline is connected to the indoor unit system; the second heat exchange pipeline is provided with a second throttling component for controlling the opening of the second heat exchange pipeline and a second temperature detector for detecting the temperature of the fluid in the second heat exchange pipeline.

[0007] Furthermore, the heat exchanger structure also includes: an upper liquid collection component, the upper liquid collection component is connected to the heat exchanger, and the first heat exchange pipeline is connected to the heat exchanger through the upper liquid collection component; a lower liquid collection component located below the upper liquid collection component, the lower liquid collection component is connected to the heat exchanger, and the second heat exchange pipeline is connected to the heat exchanger through the lower liquid collection component.

[0008] Furthermore, the heat exchanger structure also includes a control module; the control module is signal-connected to the first temperature detector and the second temperature detector, and the control module is signal-connected to the first throttling component and the second throttling component, and the control module controls the opening of the first throttling component and the second throttling component according to the temperature values ​​detected by the first temperature detector and the second temperature detector.

[0009] Furthermore, the indoor unit system includes a plurality of indoor unit components, the plurality of indoor unit components are all connected to the first heat exchange pipeline, and the plurality of indoor unit components are all connected to the second heat exchange pipeline.

[0010] Furthermore, the first heat exchange tube includes a first branch connected to each internal unit component, and the first branch is provided with a first indoor throttling component for controlling the on-off of the first branch.

[0011] Furthermore, the second heat exchange tube includes a second branch connected to each internal unit component, and a second indoor throttling component for controlling the on-off of the second branch is provided on the first branch.

[0012] Furthermore, the heat exchanger structure includes a connecting pipe, one end of the connecting pipe is connected to the indoor unit system, and the other end of the connecting pipe is connected to the heat exchanger.

[0013] Furthermore, the heat exchanger structure further includes: a compressor, which is arranged on the connecting pipeline; and a gas-liquid separator, which is arranged on the connecting pipeline.

[0014] Furthermore, the heat exchanger structure also includes a four-way valve, and the compressor and the gas-liquid separator are both arranged on the connecting pipeline through the four-way valve.

[0015] An air conditioning system includes the above-mentioned heat exchanger structure.

[0016] Beneficial effects:

[0017] The heat exchanger structure of the present invention includes: a heat exchanger; a first heat exchange pipeline, one end of the first heat exchange pipeline being connected to a liquid outlet of the heat exchanger and the other end of the first heat exchange pipeline being connected to an indoor unit system; a first throttling component for controlling the opening of the first heat exchange pipeline and a first temperature detector for detecting the temperature of the fluid in the first heat exchange pipeline; a second heat exchange pipeline, one end of the second heat exchange pipeline being connected to the liquid outlet of the heat exchanger and the other end of the second heat exchange pipeline being connected to the indoor unit system; a second throttling component for controlling the opening of the second heat exchange pipeline and a second temperature detector for detecting the temperature of the fluid in the second heat exchange pipeline. With this arrangement, the opening of one throttling component is fixed, while the other throttling component is fully closed or opened, and the temperature of the corresponding temperature detector is observed to determine whether it is stuck. A radiator component with a throttling component is proposed. By adjusting the opening size of the throttling component and observing the temperature change of the corresponding temperature detector, it is possible to promptly determine whether the throttling component is damaged and needs to be replaced without having to remove the throttling component for professional inspection. This solves the technical problem that damage to the throttling component of the heat exchanger is not easy to detect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the heat exchanger structure used in the embodiment of the present utility model;

[0019] Figure 2 It is a flow chart of a control method of a heat exchanger structure adopted in an embodiment of the present utility model.

[0020] The above drawings include the following reference numerals:

[0021] 1. Heat exchanger; 21. First throttling component; 22. Second throttling component; 31. First temperature detector; 32. Second temperature detector; 4. Indoor unit system; 51. Upper liquid collecting component; 52. Lower liquid collecting component; 6. Compressor; 7. Gas-liquid separator; 8. Four-way valve. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0023] According to the embodiment of the present invention, see Figures 1 to 2A heat exchanger structure is provided, comprising: a heat exchanger 1; a first heat exchange pipeline, one end of the first heat exchange pipeline being connected to the liquid outlet of the heat exchanger 1 and the other end of the first heat exchange pipeline being connected to the indoor unit system 4; a first throttling component 21 for controlling the opening of the first heat exchange pipeline and a first temperature detector 31 for detecting the temperature of the fluid in the first heat exchange pipeline; a second heat exchange pipeline, one end of the second heat exchange pipeline being connected to the liquid outlet of the heat exchanger 1 and the other end of the second heat exchange pipeline being connected to the indoor unit system 4; a second throttling component 22 for controlling the opening of the second heat exchange pipeline and a second temperature detector 32 for detecting the temperature of the fluid in the second heat exchange pipeline. Using the above arrangement, the opening of one throttling component is fixed, while the other throttling component is fully closed or opened, and the temperature of the corresponding temperature detector is observed to determine whether it is stuck. A radiator component with a throttling component is proposed. By adjusting the opening size of the throttling component and observing the temperature change of the corresponding temperature detector, it is possible to promptly determine whether the throttling component is damaged and needs to be replaced without having to remove the throttling component for professional inspection. This solves the technical problem that damage to the throttling component of the heat exchanger is not easy to detect.

[0024] See also Figure 1 In the heat exchanger structure of this embodiment, the heat exchanger structure also includes: an upper liquid collection component 51, the upper liquid collection component 51 is connected to the heat exchanger 1, and the first heat exchange pipeline is connected to the heat exchanger 1 through the upper liquid collection component 51; a lower liquid collection component 52 located below the upper liquid collection component 51, the lower liquid collection component 52 is connected to the heat exchanger 1, and the second heat exchange pipeline is connected to the heat exchanger 1 through the lower liquid collection component 52.

[0025] Specifically, the indoor and outdoor unit systems form a complete air conditioning and refrigeration system. The refrigerant generates or absorbs heat from the indoor air through phase changes in the heat exchanger, achieving cooling or heating. The outdoor heat exchanger 3 is divided into different zones due to the different upper and lower wind fields, each with its own control. The upper zone is connected to the upper liquid collection assembly 51 and then to the first throttle component 21. The opening of the first throttle component 21 regulates the amount of refrigerant passing through the upper heat exchanger. The first temperature detector 31 is located between the upper liquid collection assembly 51 and the first throttle component 21. During cooling operation, it can monitor the state of the refrigerant after heat exchange through the upper heat exchanger. The lower zone is connected to the lower liquid collection assembly 52 and then to the second throttle component 22. The opening of the second throttle component 22 regulates the amount of refrigerant passing through the upper heat exchanger. The second temperature detector 32 is located between the lower liquid collection assembly 52 and the second throttle component 22. During cooling operation, it can monitor the state of the refrigerant after heat exchange through the lower heat exchanger.

[0026] See also Figure 1In the heat exchanger structure of this embodiment, the heat exchanger structure also includes a control module; the control module is signal-connected to the first temperature detector 31 and the second temperature detector 32, and the control module is signal-connected to the first throttle component 21 and the second throttle component 22. The control module controls the opening of the first throttle component 21 and the second throttle component 22 according to the temperature values ​​detected by the first temperature detector 31 and the second temperature detector 32.

[0027] See also Figure 1 In the heat exchanger structure of this embodiment, the indoor unit system 4 includes multiple indoor unit components 41. Each of the multiple indoor unit components 41 is connected to a first heat exchange pipeline, and each of the multiple indoor unit components 41 is connected to a second heat exchange pipeline. Thus, the heat exchanger 1 provides refrigerant to the indoor unit system 4 via the first and second heat exchange pipelines, improving the temperature regulation capability.

[0028] See also Figure 1 In the heat exchanger structure of this embodiment, the first heat exchange tube includes a first branch connected to each indoor unit component 41, and a first indoor throttling component for controlling the on-off of the first branch is provided on the first branch.

[0029] See also Figure 1 In the heat exchanger structure of this embodiment, the second heat exchange tube includes a second branch connected to each internal unit component 41, and a second indoor throttling component for controlling the on-off of the second branch is provided on the first branch.

[0030] See also Figure 1 In the heat exchanger structure of this embodiment, the heat exchanger structure includes a connecting pipe, one end of the connecting pipe is connected to the indoor unit system 4, and the other end of the connecting pipe is connected to the heat exchanger.

[0031] See also Figure 1 In the heat exchanger structure of this embodiment, the heat exchanger structure further includes: a compressor 6, which is arranged on the connecting pipeline; and a gas-liquid separator 7, which is arranged on the connecting pipeline.

[0032] See also Figure 1 In the heat exchanger structure of this embodiment, the heat exchanger structure further includes a four-way valve 8, and the compressor 6 and the gas-liquid separator 7 are both arranged on the connecting pipeline through the four-way valve 8.

[0033] The air conditioning system of this embodiment includes the above-mentioned heat exchanger structure.

[0034] The heat exchanger structure of this embodiment is described as follows:

[0035] The indoor and outdoor units form a complete air conditioning and refrigeration system. The refrigerant generates or absorbs heat from the indoor air through phase changes in the heat exchanger, achieving cooling or heating. The outdoor heat exchanger 3 is divided into different zones due to the different wind fields in the upper and lower layers, each with its own control. The upper zone is connected to the upper liquid collection assembly 51, which in turn is connected to the first throttle component 21. The opening of the first throttle component 21 regulates the amount of refrigerant passing through the upper heat exchanger. The first temperature sensor 31 is located between the upper liquid collection assembly 51 and the first throttle component 21. During cooling operation, it can monitor the state of the refrigerant after heat exchange through the upper heat exchanger. The lower zone is connected to the lower liquid collection assembly 52, which in turn is connected to the second throttle component 22. The opening of the second throttle component 22 regulates the amount of refrigerant passing through the upper heat exchanger. The second temperature sensor 32 is located between the lower liquid collection assembly 52 and the second throttle component 22. During cooling operation, it can monitor the state of the refrigerant after heat exchange through the lower heat exchanger.

[0036] Based on the above system structure, the self-diagnosis method for suspected throttling component damage during cooling operation is as follows: In cooling mode, at a specific circulating refrigerant volume, the difference in opening between the first throttling components 21 and 2 is within X0 pls, and the temperatures of the first temperature detector 31 and the second temperature detector 32 are uniform. If the opening exceeds X0 pls, a throttling component is suspected of being damaged. The following method can be used to verify which throttling component has the problem.

[0037] Assuming the first throttle component 21 is normal, set it to its maximum opening, Xmpls, and verify whether the second throttle component 22 is damaged. Set the second throttle component 22 to 0 pls, meaning it is completely closed. After a time t0, observe whether the temperature change of the second temperature detector 32 approaches the ambient temperature T1. If the temperature change of the second temperature detector 32 does not approach T1, the second throttle component 22 may be stuck. If the temperature change of the second temperature detector 32 approaches T1, the second throttle component 22 is not stuck. If the second throttle component 22 is stuck, replace it with a new one. If the second throttle component 22 is not stuck, set the maximum opening, Xmpls, and then set the first throttle component 21 to 0 pls, meaning it is completely closed. After a time t0, observe whether the temperature change of the first temperature detector 31 approaches the ambient temperature T1. If the temperature change of the first temperature detector 31 does not approach T1, the first throttle component 21 may be stuck. If the temperature change of the first temperature detector 31 approaches T1, the first throttle component 21 is not stuck. If the first throttle component 21 and the second throttle component 22 are not stuck, the second damage condition is verified.

[0038] The second damage situation is that the valve loses control, that is, the throttling component opening increases, that is, the actual throttling component opening may decrease or not increase according to the set value; when the throttling component opening is reduced, the actual throttling component opening may increase or not decrease according to the set value. The above two are out-of-control situations. If it is verified whether it is a failure situation, first determine whether the system is in a refrigerant storage state, that is, the amount of refrigerant circulating in the system is too much. The reason is that if the system is in a refrigerant storage state, the amount of refrigerant is too much, resulting in the temperature change of the temperature detector when adjusting the throttling component is not obvious. At this time, it is very easy to misjudge whether the throttling component is out of control, so the system must not be in a refrigerant storage state before self-checking. During the refrigeration cycle, if the temperature value of the first temperature detector 31, 2 is less than T1+t (T1 is the ambient temperature, t is a threshold), it is considered that the system is in a refrigerant storage state. For an air conditioning system with a refrigerant adjustment tank, the system can be taken out of the refrigerant storage state by adding refrigerant to the refrigerant adjustment tank. This allows the temperature of the first temperature detectors 31 and 2 to be more clearly reflected by the opening of the first throttle component 21 and the second throttle component 22. At this time, the following operations are performed:

[0039] Set the first throttle component 21 to its maximum opening, Xmpls. At this point, adjust the second throttle component 22 to a fixed opening, X (X < Xm). After a time t0, increase the opening by X1pls. If the throttle component is not out of control at this time, the opening of the second throttle component 22 becomes x + X1. At this time, due to the increased opening of the second throttle component 22, the refrigerant flow rate in the area of ​​the outdoor unit condenser controlled by the second throttle component 22 increases. The increased unit mass flow rate of the refrigerant will lead to insufficient heat exchange, which will cause the temperature value of the corresponding second temperature detector 32 to increase. At the same time, because the amount of circulating refrigerant in the system is fixed, a large unit mass flow rate of refrigerant in the area of ​​the outdoor unit condenser controlled by the second throttle component 22 will cause the corresponding unit mass flow rate of refrigerant in the area of ​​the outdoor unit condenser controlled by the first throttle component 21 to decrease, causing the temperature value of the corresponding first temperature detector 31 to decrease. Conversely, if the second throttle member 22 is set to a fixed opening of X (X < Xm), and then reduced by X1 pls after time t0, if the throttle member is not out of control, the opening of the second throttle member 22 will become x - X1. At this point, the temperature of the second temperature detector 32 will decrease, while the temperature of the first temperature detector 31 will increase. Repeat this process several times. If the temperature changes of the first temperature detectors 31 and 32 follow this pattern, it can be verified that the second throttle member 22 is not out of control. If not, it indicates that the second throttle member 22 is out of control and needs to be replaced.

[0040] At this time, if the second throttle component 22 is damaged, it can be replaced with a new component. After confirming that the second throttle component 22 can be controlled normally, the above method can be used to verify whether the first throttle component 21 is damaged.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0043] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0044] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0045] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A heat exchanger structure, characterized in that: The heat exchanger structure comprises: Heat exchanger (1); a first heat exchange pipeline, one end of the first heat exchange pipeline being in communication with a liquid outlet of the heat exchanger (1), and the other end of the first heat exchange pipeline being connected to an indoor unit system (4); the first heat exchange pipeline being provided with a first throttling component (21) for controlling the opening of the first heat exchange pipeline and a first temperature detector (31) for detecting the temperature of the fluid in the first heat exchange pipeline; A second heat exchange pipeline, one end of the second heat exchange pipeline is connected to the liquid outlet of the heat exchanger (1), and the other end of the second heat exchange pipeline is connected to the indoor unit system (4); the second heat exchange pipeline is provided with a second throttling component (22) for controlling the opening of the second heat exchange pipeline and a second temperature detector (32) for detecting the temperature of the fluid in the second heat exchange pipeline.

2. The heat exchanger structure according to claim 1, characterized in that: The heat exchanger structure further comprises: An upper liquid collecting component (51), the upper liquid collecting component (51) being connected to the heat exchanger (1), and the first heat exchange pipeline being connected to the heat exchanger (1) via the upper liquid collecting component (51); A lower liquid collection component (52) is located below the upper liquid collection component (51), the lower liquid collection component (52) is connected to the heat exchanger (1), and the second heat exchange pipeline is connected to the heat exchanger (1) through the lower liquid collection component (52).

3. The heat exchanger structure according to claim 1, characterized in that: The heat exchanger structure further includes a control module; the control module is signal-connected to the first temperature detector (31) and the second temperature detector (32), the control module is signal-connected to the first throttling component (21) and the second throttling component (22), and the control module controls the opening of the first throttling component (21) and the second throttling component (22) according to the temperature values ​​detected by the first temperature detector (31) and the second temperature detector (32).

4. The heat exchanger structure according to claim 1, characterized in that: The indoor unit system (4) comprises a plurality of indoor unit components (41), wherein the plurality of indoor unit components (41) are all connected to the first heat exchange pipeline, and the plurality of indoor unit components (41) are all connected to the second heat exchange pipeline.

5. The heat exchanger structure according to claim 4, characterized in that: The first heat exchange tube includes a first branch connected to each of the internal machine components (41), and the first branch is provided with a first indoor throttling component for controlling the on-off of the first branch.

6. The heat exchanger structure according to claim 5, characterized in that: The second heat exchange tube includes a second branch connected to each of the internal unit components (41), and the first branch is provided with a second indoor throttling component for controlling the on-off of the second branch.

7. The heat exchanger structure according to claim 1, characterized in that: The heat exchanger structure comprises a connecting pipe, one end of the connecting pipe is connected to the indoor unit system (4), and the other end of the connecting pipe is connected to the heat exchanger (1).

8. The heat exchanger structure according to claim 7, characterized in that: The heat exchanger structure further comprises: A compressor (6), the compressor (6) being arranged on the connecting pipeline; A gas-liquid separator (7), wherein the gas-liquid separator (7) is arranged on the connecting pipeline.

9. The heat exchanger structure according to claim 8, characterized in that: The heat exchanger structure further comprises a four-way valve (8), and the compressor (6) and the gas-liquid separator (7) are both arranged on the connecting pipeline via the four-way valve (8).

10. An air conditioning system, characterized in that: The air conditioning system includes the heat exchanger structure according to claim 1 or 9.

Images