Detection method, heat exchanger structure and air conditioning system

Abstract

The application provides a detection method, a heat exchanger structure and an air conditioning system. The detection method comprises judging whether at least one throttling component connected with the heat exchanger needs to be inspected; when the at least one throttling component needs to be inspected, fixing the opening degree of a first throttling component in the at least one throttling component, and controlling a second throttling component in the at least one throttling component to be fully opened or fully closed; and judging whether the second throttling component is stuck according to the temperature value of a first temperature detector corresponding to the first throttling component and the temperature value of a second temperature detector corresponding to the second throttling component. The detection method solves the technical problem that the damage of the throttling component of the heat exchanger is not easy to be found.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a detection method, a heat exchanger structure and an air conditioning system. BACKGROUND

[0002] In order to make the upper and lower layers of the outdoor heat exchanger evenly distribute the refrigerant and fully play the heat exchange efficiency of the heat exchanger, some people have proposed to use multiple throttling components to independently control the flow of refrigerant for the upper and lower layers of the same heat exchanger. However, during operation, it is found that if the throttling component is damaged (stuck or out of control), the system will still run normally and cannot be identified and detected to report a fault. However, if the throttling component is damaged and not found in time, it will not be able to accurately control the amount of refrigerant in different areas of the outdoor heat exchanger, and the problem of uneven distribution of refrigerant inside the heat exchanger will still occur, thereby affecting the heat exchange efficiency of the heat exchanger, and thus losing the significance of setting multiple throttling components for independent control.

[0003] However, there is currently no effective method for self-checking of the damage of multiple throttling components of the outdoor heat exchanger, which can quickly find the problem so that new components can be replaced in time, thereby affecting the role of the throttling component and affecting the improvement of the heat exchange efficiency of the heat exchanger.

[0004] Therefore, the prior art needs to be further developed. SUMMARY

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

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme: a detection method is provided, comprising: judging whether at least one throttling component connected with a heat exchanger needs to be inspected; when at least one throttling component needs to be inspected, fixing the opening degree of a first throttling component in the at least one throttling component, and controlling a second throttling component in the at least one throttling component to be fully opened or fully closed; judging whether the second throttling component is stuck according to the temperature value of a first temperature detector corresponding to the first throttling component and the temperature value of a second temperature detector corresponding to the second throttling component.

[0007] Further, the method for judging whether the second throttling component is stuck comprises: setting the first throttling component to the maximum opening degree; completely closing the second throttling component, and observing whether the temperature value of the second temperature detector approaches the ambient temperature T1 after a period of operation; if the temperature of the second temperature detector does not approach T1, the second throttling component may be stuck; if the temperature change of the second temperature detector approaches the ambient temperature T1, the second throttling component is not stuck.

[0008] Further, the method for judging whether the temperature value of the second temperature detector is close to the ambient temperature T1 comprises: setting threshold values X and Y, wherein X < T1 < Y; if X < the temperature of the second temperature detector < Y, judging whether the temperature value of the second temperature detector is close to the ambient temperature T1.

[0009] Further, if the second throttling component is not stuck, setting the second throttling component to the maximum opening, completely closing the first throttling component, and observing whether the temperature value of the first temperature detector is close to the ambient temperature T1 after running for a period of time; if the temperature value of the first temperature detector is not close to T1, the first throttling component is likely to be stuck; if the temperature value of the first temperature detector is close to the ambient temperature T1, the first throttling component is not stuck.

[0010] Further, the method for judging whether at least one of the throttling components connected to the heat exchanger needs to be inspected comprises: adjusting the opening of the first throttling component and the second throttling component so that the temperature value of the first temperature detector is consistent with the temperature value of the second temperature detector corresponding to the second throttling component; setting an opening threshold value, and if the opening of the first throttling component or the second throttling component exceeds the opening threshold value at this time, judging that at least one of the throttling components needs to be inspected.

[0011] Further, the first temperature detector corresponding to the first throttling component is a temperature detector arranged on the same pipeline as the first throttling component; and / or the second temperature detector corresponding to the second throttling component is a temperature detector arranged on the same pipeline as the second throttling component.

[0012] Further, if it is judged that neither the first throttling component nor the second throttling component is stuck, judging whether the system in which the heat exchanger is located is in a refrigerant trapping state; if the system in which the heat exchanger is located is not in a refrigerant trapping state, judging whether at least one of the throttling components is out of control.

[0013] Further, the method for judging whether the system in which the heat exchanger is located is in a refrigerant trapping state comprises: when the heat exchanger is running, if the temperature value of the first temperature detector and the temperature value of the second temperature detector are both less than a threshold value T1 + t, judging that the system is in a refrigerant trapping state; wherein T1 is the ambient temperature and t is a set value.

[0014] Further, the method for judging whether the at least one throttling component is out of control comprises: setting the first throttling component to maximum opening, and setting the second throttling component to preset opening; after the heat exchanger runs for a period of time, increasing the opening of the second throttling component; if the temperature value of the second temperature detector increases and the temperature value of the first temperature detector decreases, it is judged that the second throttling component is not out of control; otherwise, it is judged that the second throttling component is out of control.

[0015] Further, the method for judging whether the at least one throttling component is out of control comprises: setting the first throttling component to maximum opening, and setting the second throttling component to preset opening; after the heat exchanger runs for a period of time, increasing the opening of the second throttling component; if the temperature value of the second temperature detector increases and the temperature value of the first temperature detector decreases, it is judged that the second throttling component is not out of control; otherwise, it is judged that the second throttling component is out of control.

[0016] A heat exchanger structure suitable for the above detection method, the heat exchanger structure comprising: a heat exchanger; a first heat exchange pipeline, one end of the first heat exchange pipeline being in communication with a liquid outlet of the heat exchanger, and the other end of the first heat exchange pipeline being connected with an indoor unit system; the first heat exchange pipeline being 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 fluid in the first heat exchange pipeline; a second heat exchange pipeline, one end of the second heat exchange pipeline being in communication with the liquid outlet of the heat exchanger, and the other end of the second heat exchange pipeline being connected with the indoor unit system; the second heat exchange pipeline being 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 fluid in the second heat exchange pipeline.

[0017] Further, the heat exchanger structure further comprises: an upper liquid collecting assembly connected with the heat exchanger, the first heat exchange pipeline being connected with the heat exchanger through the upper liquid collecting assembly; a lower liquid collecting assembly located below the upper liquid collecting assembly, the lower liquid collecting assembly being connected with the heat exchanger, and the second heat exchange pipeline being connected with the heat exchanger through the lower liquid collecting assembly.

[0018] An air conditioning system suitable for the above detection method, the air conditioning system comprising the above heat exchanger structure.

[0019] Advantages:

[0020] The detection method of the present application comprises judging whether at least one throttling component connected with the heat exchanger needs to be inspected; when the at least one throttling component needs to be inspected, fixing the opening degree of a first throttling component in the at least one throttling component, controlling a second throttling component in the at least one throttling component to be fully opened or fully closed; judging whether the second throttling component is stuck according to the temperature value of a first temperature detector corresponding to the first throttling component and the temperature value of a second temperature detector corresponding to the second throttling component. By using the above arrangement, the opening degree of one throttling component is fixed, and the other throttling component is fully closed or fully opened to observe whether the temperature of the corresponding temperature detector changes to judge whether it is stuck. A self-checking method of the throttling component is proposed, the temperature change of the corresponding temperature detector is observed by adjusting the opening degree of the throttling component, whether the throttling component is damaged and needs to be replaced is judged in time without the need to disassemble the throttling component for professional inspection, and the technical problem that the damage of the throttling component of the heat exchanger is not easy to be found is solved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the heat exchanger structure adopted by the embodiment of the present application;

[0022] Figure 2 is a flow chart of the control method adopted by the embodiment of the present application.

[0023] Among them, the above drawings include the following reference signs:

[0024] 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 assembly; 52, lower liquid collecting assembly. DETAILED DESCRIPTION

[0025] In order to enable personnel in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0026] According to the embodiment of the present application, a detection method is provided, which comprises: judging whether at least one throttling component connected with the heat exchanger 1 needs to be inspected; fixing the opening degree of a first throttling component 21 in the at least one throttling component, and controlling a second throttling component 22 in the at least one throttling component to be fully opened or fully closed when the at least one throttling component needs to be inspected; judging whether the second throttling component 22 is stuck according to the temperature value of a first temperature detector 31 corresponding to the first throttling component 21 and the temperature value of a second temperature detector 32 corresponding to the second throttling component 22. By fixing the opening degree of one throttling component and observing whether the temperature of the corresponding temperature detector changes when the other throttling component is fully opened or fully closed, it can be judged whether the throttling component is stuck. The self-detection method of the throttling component is proposed, the temperature change of the corresponding temperature detector is observed by adjusting the opening degree of the throttling component, and it can be judged in time whether the throttling component is damaged and needs to be replaced without dismounting the throttling component for professional inspection, thereby solving the technical problem that the damage of the throttling component of the heat exchanger is not easy to be found.

[0027] In the control method of the embodiment, referring to Figure 1 , Figure 2 , the method for judging whether the second throttling component 22 is stuck comprises: setting the first throttling component 21 to the maximum opening degree; fully closing the second throttling component 22, and observing whether the temperature value of the second temperature detector 32 approaches the ambient temperature T1 after running for a period of time; if the temperature of the second temperature detector 32 does not approach T1, the second throttling component 22 is possibly stuck; and if the temperature change of the second temperature detector 32 approaches the ambient temperature T1, the second throttling component 22 is not stuck.

[0028] Specifically, if the second throttling component 22 is not stuck, the opening degree of the second throttling component 22 is 0 at this time, i.e., fully closed. After the second throttling component 22 is closed, the refrigerant of the lower heat exchanger gradually stops flowing, the refrigerant gradually accumulates in the lower heat exchanger, and then the lower heat exchanger cannot exchange heat, so the temperature gradually approaches the ambient temperature. By using the above method, whether the second throttling component 22 is stuck can be effectively detected.

[0029] Referring to Figure 1 , Figure 2 In the control method of the embodiment, the method for judging whether the temperature value of the second temperature detector 32 approaches the ambient temperature T1 comprises: setting threshold values X and Y; X < T1 < Y; and judging whether the temperature value of the second temperature detector 32 approaches the ambient temperature T1 when X < the temperature of the second temperature detector 32 < Y. In this way, a range is set, and when the temperature of the second temperature detector 32 is in the range near the ambient temperature value T1, it is determined whether the temperature value of the second temperature detector 32 approaches the ambient temperature T1. This judgment is simple and easy to operate.

[0030] In the control method of this embodiment, see Figure 1 , Figure 2 If the second throttling component 22 is not stuck, set the second throttling component 22 to its maximum opening; completely close the first throttling component 21; after running for a period of time, observe whether the temperature value of the first temperature detector 31 is close to the ambient temperature T1; if the temperature value of the first temperature detector 31 is not close to T1, the first throttling component 21 may be stuck; if the temperature change of the first temperature detector 31 is close to the ambient temperature T1, the first throttling component 21 is not stuck.

[0031] Specifically, when performing the above operations, it cannot be confirmed whether the first throttling component 21 is stuck. Therefore, it is assumed that the first throttling component 21 is not stuck, and the second throttling component 22 is checked for sticking. If the second throttling component 22 is stuck, a new valve is replaced. If the second throttling component 22 is not stuck, the first throttling component 21 is checked for sticking. Mutual verification is required.

[0032] In the control method of this embodiment, see Figure 1 , Figure 2 The method for determining whether at least one throttling component connected to heat exchanger 1 needs to be inspected includes: adjusting the opening degree of the first throttling component 21 and the second throttling component 22 so that the temperature value of the first temperature detector 31 and the temperature value of the second temperature detector 32 corresponding to the second throttling component 22 are consistent; setting an opening degree threshold, if the opening degree of the first throttling component 21 or the second throttling component 22 exceeds the opening degree threshold at this time, then it is determined that at least one throttling component needs to be inspected.

[0033] Specifically, because the heat exchange effect varies at different locations within the heat exchanger, the temperatures of the first temperature detector 31 and the second temperature detector 32 will differ. To achieve higher energy efficiency, we adjust the first throttling component 21 and the second throttling component 22 to ensure that the temperatures of their corresponding temperature detectors are consistent. At this point, the opening degree between throttling components 21 and 22 has a threshold value. Under constant operating conditions and a constant circulating refrigerant volume, this threshold value is definite. Therefore, if this threshold value is exceeded, we suspect that at least one throttling component is damaged and requires inspection.

[0034] In the control method of this embodiment, see Figure 1 The first temperature detector 31 corresponding to the first throttling component 21 is a temperature detector installed on the same pipeline as the first throttling component 21; and / or, the second temperature detector 32 corresponding to the second throttling component 22 is a temperature detector installed on the same pipeline as the second throttling component 22. In this way, the throttling components are matched with the temperature detectors, and each temperature detector detects the temperature of its corresponding throttling component, thereby accurately reflecting the condition of each throttling component.

[0035] Referring to Figure 2 In the control method of the embodiment, if it is determined that neither the first throttling component 21 nor the second throttling component 22 is stuck, it is determined whether the system in which the heat exchanger 1 is located is in a refrigerant loss state; if the system in which the heat exchanger 1 is located is not in a refrigerant loss state, it is determined whether at least one throttling component is out of control.

[0036] Specifically, the temperature change of the system refrigerant amount and temperature detector is related to the size of the throttling component opening degree, and if the system is in a refrigerant loss state, the temperature change of the temperature detector is not obvious when adjusting the throttling component, and in this state, it is easy to misjudge whether the throttling component is out of control. The above method can avoid the misjudgment of the throttling component.

[0037] In the control method of the embodiment, referring to Figure 2 The method for determining whether the system in which the heat exchanger 1 is located is in a refrigerant loss state comprises: when the heat exchanger 1 is running, the temperature value of the first temperature detector 31 and the temperature value of the second temperature detector 32 are both less than the threshold T1+t, it is determined that the system is in a refrigerant loss state; wherein T1 is the ambient temperature and t is a set value. In this way, the system in a refrigerant loss state can be effectively determined.

[0038] Referring to Figure 2 In the control method of the embodiment, the method for determining whether at least one throttling component is out of control comprises: setting the first throttling component 21 to the maximum opening degree and setting the second throttling component 22 to a preset opening degree; after the heat exchanger 1 runs for a period of time, the opening degree of the second throttling component 22 is increased; if the temperature value of the second temperature detector 32 rises and the temperature value of the first temperature detector 31 decreases, it is determined that the second throttling component 22 is not out of control; otherwise, it is determined that the second throttling component 22 is out of control. In this way, by fixing the opening degree of one throttling component and gradually increasing the opening degree of the other throttling component, it is observed whether the temperature change of each temperature detector is regular to determine whether it is out of control, which is convenient and accurate.

[0039] In the control method of the embodiment, referring to Figure 2 The method for determining whether at least one throttling component is out of control comprises: setting the first throttling component 21 to the maximum opening degree and setting the second throttling component 22 to a preset opening degree; after the heat exchanger 1 runs for a period of time, the opening degree of the second throttling component 22 is decreased; if the temperature value of the second temperature detector 32 decreases and the temperature value of the first temperature detector 31 increases, it is determined that the second throttling component 22 is not out of control; otherwise, it is determined that the second throttling component 22 is out of control. In this way, by fixing the opening degree of one throttling component and gradually increasing the opening degree of the other throttling component, it is observed whether the temperature change of each temperature detector is regular to determine whether it is out of control, which is convenient and accurate.

[0040] Referring to Figure 1The heat exchanger structure of the embodiment is suitable for the detection method, and comprises: a heat exchanger 1; a first heat exchange pipeline, one end of the first heat exchange pipeline is communicated with a liquid outlet of the heat exchanger 1, and the other end of the first heat exchange pipeline is connected with an indoor unit system 4; a first throttling component 21 for controlling the opening degree of the first heat exchange pipeline and a first temperature detector 31 for detecting the temperature of fluid in the first heat exchange pipeline are arranged on the first heat exchange pipeline; a second heat exchange pipeline, one end of the second heat exchange pipeline is communicated with the liquid outlet of the heat exchanger 1, and the other end of the second heat exchange pipeline is connected with the indoor unit system 4; a second throttling component 22 for controlling the opening degree of the second heat exchange pipeline and a second temperature detector 32 for detecting the temperature of fluid in the second heat exchange pipeline are arranged on the second heat exchange pipeline.

[0041] In the heat exchanger structure of the embodiment, referring to Figure 1 , the heat exchanger structure further comprises: an upper liquid collecting assembly 51, the upper liquid collecting assembly 51 is connected with the heat exchanger 1, and the first heat exchange pipeline is connected with the heat exchanger 1 through the upper liquid collecting assembly 51; a lower liquid collecting assembly 52 located below the upper liquid collecting assembly 51, the lower liquid collecting assembly 52 is connected with the heat exchanger 1, and the second heat exchange pipeline is connected with the heat exchanger 1 through the lower liquid collecting assembly 52.

[0042] Specifically, the indoor unit system 4 and the outdoor unit system constitute a complete air conditioning refrigeration system, and heat in indoor air is generated or absorbed through phase change of refrigerant in the heat exchanger, so that the effect of refrigeration or heating is achieved. The outdoor heat exchanger 3 is divided into different regions due to different upper and lower wind fields, and each region has a separate control. The upper region is connected with the upper liquid collecting assembly 51, and then connected with the first throttling component 21, and the amount of refrigerant passing through the upper heat exchanger is adjusted through the opening degree of the first throttling component 21. The first temperature detector 31 is located between the upper liquid collecting assembly 51 and the first throttling component 21. In the refrigeration operation, the state of refrigerant after heat exchange through the upper heat exchanger can be reflected. The lower region is connected with the lower liquid collecting assembly 52, and then connected with the second throttling component 22, and the amount of refrigerant passing through the upper heat exchanger is adjusted through the opening degree of the second throttling component 22. The second temperature detector 32 is located between the lower liquid collecting assembly 52 and the second throttling component 22. In the refrigeration operation, the state of refrigerant after heat exchange through the lower heat exchanger can be reflected.

[0043] The air conditioning system of the embodiment is suitable for the detection method, and comprises the heat exchanger structure described above.

[0044] The control method of the embodiment is described as follows:

[0045] The indoor system 4 and the outdoor system constitute a complete air conditioning refrigeration system, and heat in the indoor air is generated or absorbed by the phase change of refrigerant in the heat exchanger to achieve the effect of refrigeration or heating. The outdoor heat exchanger 3 is divided into different regions due to the difference between the upper and lower wind fields, and each region has a separate control. The upper region is connected with the upper liquid collecting assembly 51, and then connected with the first throttling component 21, and the refrigerant amount passing through the upper heat exchanger is adjusted by the opening size of the first throttling component 21. The first temperature detector 31 is located between the upper liquid collecting assembly 51 and the first throttling component 21. In the refrigeration operation, the state of the refrigerant after heat exchange through the upper heat exchanger can be reflected. The lower region is connected with the lower liquid collecting assembly 52, and then connected with the second throttling component 22, and the refrigerant amount passing through the upper heat exchanger is adjusted by the opening size of the second throttling component 22. The second temperature detector 32 is located between the lower liquid collecting assembly 52 and the second throttling component 22. In the refrigeration operation, the state of the refrigerant after heat exchange through the lower heat exchanger can be reflected.

[0046] Based on the above system structure, the self-checking method when the throttling component is suspected to be damaged during the refrigeration operation of the system is as follows: in the refrigeration mode, under a certain specific circulating refrigerant amount, the opening difference of the first throttling component 21 and 2 is within X0pls, and the temperatures of the first temperature detector 31 and the second temperature detector 32 can be uniform. If the opening exceeds X0pls, it is suspected that there is a problem of damage of a certain throttling component. The following method is used to verify which throttling component has a problem.

[0047] Suppose that the first throttling component 21 is in a normal state and is set to the maximum opening Xmpls, and whether the second throttling component 22 is damaged is verified. The second throttling component 22 is set to 0pls, i.e., completely closed, and after running for a time t0, whether the temperature change of the second temperature detector 32 approaches the ambient temperature T1 is observed. If the temperature change of the second temperature detector 32 does not approach T1, the second throttling component 22 may be stuck; if the temperature change of the second temperature detector 32 approaches the ambient temperature T1, the second throttling component 22 is not stuck. If the second throttling component 22 is stuck, a new component is replaced, and if the second throttling component 22 is not stuck, the first throttling component 21 is set to 0pls, i.e., completely closed, after being set to the maximum opening Xmpls. After running for a time t0, whether the temperature change of the first temperature detector 31 approaches the ambient temperature T1 is observed. If the temperature change of the first temperature detector 31 does not approach T1, the first throttling component 21 may be stuck; if the temperature change of the first temperature detector 31 approaches the ambient temperature T1, the first throttling component 21 is not stuck. If neither the first throttling component 21 nor the second throttling component 22 is stuck, the second damage condition is verified.

[0048] The second damage case is that the valve loses control, i.e. the opening of the throttling component is increased, and the actual opening of the throttling component can be decreased or not increased as set. When the opening of the throttling component is decreased, the actual opening of the throttling component can be increased or not decreased as set. The above two cases are out-of-control cases. If it is verified whether it is a failure case, it is firstly judged whether the system is in a refrigerant accumulation state, i.e. the refrigerant amount in the system is too much. The reason is that if the system is in the refrigerant accumulation state, the temperature change of the temperature detector is not obvious when the refrigerant amount is large, and at this time, it is easy to misjudge whether the throttling component is out of control. Therefore, the system should not be in the refrigerant accumulation state to be self-checked. If the temperature value of the first temperature detector 31, 2 is < T1 + t (T1 is the ambient temperature, and t is a threshold value) in the refrigeration cycle, it is considered that the system is in the refrigerant accumulation state. For the air conditioning system with a refrigerant adjusting tank, the system can be brought out of the refrigerant accumulation state by increasing the refrigerant in the refrigerant adjusting tank, so that the temperature of the first temperature detector 31, 2 is more obviously reflected by the opening of the first throttling component 21 and the second throttling component 22. At this time, the following operations are performed:

[0049] The first throttling component 21 is set to the maximum opening Xmpls, and the second throttling component 22 is adjusted to the fixed opening X (X < Xm) at this time. After running for t0 time, the opening of X1pls is increased. If the throttling component is not out of control at this time, the opening of the second throttling component 22 becomes x + X1. At this time, due to the increase of the opening of the second throttling component 22, the refrigerant flow rate of the area of the outdoor condenser controlled by the second throttling component 22 is fast, the unit mass flow of the refrigerant is increased, and the heat exchange is insufficient, which will cause the temperature value of the corresponding second temperature detector 32 to rise. At the same time, since the circulating refrigerant amount of the system is fixed, the unit mass flow of the refrigerant of the area of the outdoor condenser controlled by the second throttling component 22 is large, and the unit mass flow of the refrigerant of the area of the outdoor condenser controlled by the first throttling component 21 is small, so that the temperature value of the corresponding first temperature detector 31 will decrease. Conversely, if the second throttling component 22 is adjusted to the fixed opening X (X < Xm), the opening of X1pls is decreased after running for t0 time. If the throttling component is not out of control at this time, the opening of the second throttling component 22 becomes x - X1. At this time, the temperature value of the second temperature detector 32 decreases, and the temperature value of the first temperature detector 31 increases. Repeat several times. If the temperature change of the first temperature detector 31, 2 conforms to the above rule, it can be verified that the second throttling component 22 is not out of control. If it does not conform, it means that the second throttling component 22 loses control, and the next step is to replace a new throttling component.

[0050] At this time, if the second throttling component 22 is damaged, a new component can be replaced, and then when it is determined that the second throttling component 22 can be normally controlled, the above method is used to verify whether the first throttling component 21 is damaged.

[0051] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the use of these terms is arbitrary apart from their definition in the specification or by understanding that the use of these terms in the present description is solely for the purpose of nomenclature and does not in any way limit the scope of the application. Furthermore, the terms "comprise", "comprising", "include", "including", and the like are to be construed in their non-limiting sense as meaning that "comprising" other elements not specifically recited are also included. The terms "first", "second" and the like, "antecedent" and "subsequent", as used in the description and the claims, do not connote any prioritization, ordering, or importance, but are used only to distinguish between the elements being described.

[0052] Optionally, the specific examples in the embodiments can refer to the examples described in the above embodiments, and the embodiments will not be described here again.

[0053] The sequence numbers of the above-described embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0054] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0055] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A detection method, characterized in that, Suitable for heat exchanger structures, the heat exchanger structure comprising: Heat exchanger (1); The first heat exchange pipeline has one end connected to the liquid outlet of the heat exchanger (1) and the other end connected to the indoor unit system (4). The first heat exchange pipeline is 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. The second heat exchange pipeline has one end connected to the liquid outlet of the heat exchanger (1) and the other end 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. The detection method includes: Determine whether at least one throttling component connected to the heat exchanger (1) needs to be inspected; When at least one of the throttling components needs to be tested, the opening degree of the first throttling component (21) among the at least one throttling component is fixed, and the second throttling component (22) among the at least one throttling component is controlled to be fully open or fully closed; based on the temperature value of the first temperature detector (31) corresponding to the first throttling component (21) and the temperature value of the second temperature detector (32) corresponding to the second throttling component (22), it is determined whether the second throttling component (22) is stuck; If it is determined that neither the first throttling component (21) nor the second throttling component (22) is stuck, then it is determined whether the system in which the heat exchanger (1) is located is in a refrigerant storage state. If the system in which the heat exchanger (1) is located is not in a refrigerant-storing state, then determine whether the at least one of the throttling components is out of control. The first throttling component (21) is set to the maximum opening, and the second throttling component (22) is set to the preset opening. After the heat exchanger (1) has been running for a period of time, the opening of the second throttling component (22) is increased; If the temperature value of the second temperature detector (32) rises and the temperature value of the first temperature detector (31) falls, it is determined that the second throttling component (22) is not out of control; otherwise, it is determined that the second throttling component (22) is out of control.

2. The detection method according to claim 1, characterized in that, The methods for determining whether the second throttling component (22) is stuck include: Set the first throttling component (21) to its maximum opening; After completely shutting off the second throttling component (22) and running it for a period of time, observe whether the temperature value of the second temperature detector (32) is close to the ambient temperature T1. If the temperature of the second temperature detector (32) is not close to T1, the second throttling component (22) may be stuck; if the temperature change of the second temperature detector (32) is close to the ambient temperature T1, the second throttling component (22) is not stuck.

3. The detection method according to claim 2, characterized in that, The method for determining whether the temperature value of the second temperature detector (32) is close to the ambient temperature T1 includes: Set thresholds X and Y; where X < T1 < Y; if X < temperature of the second temperature detector (32) < Y, then determine whether the temperature value of the second temperature detector (32) is close to the ambient temperature T1.

4. The detection method according to claim 2, characterized in that, If the second throttling component (22) is not stuck, then the second throttling component (22) is set to the maximum opening. Completely shut off the first throttling component (21); after running for a period of time, observe whether the temperature value of the first temperature detector (31) is close to the ambient temperature T1; If the temperature value of the first temperature detector (31) is not close to T1, the first throttling component (21) may get stuck. If the temperature change of the first temperature detector (31) is close to the ambient temperature T1, then the first throttling component (21) is not stuck.

5. The detection method according to claim 1, characterized in that, Methods for determining whether at least one throttling component connected to the heat exchanger (1) needs to be inspected include: Adjust the opening of the first throttling component (21) and the second throttling component (22) so that the temperature value of the first temperature detector (31) is consistent with the temperature value of the second temperature detector (32) corresponding to the second throttling component (22); Set an opening threshold. If the opening of the first throttling component (21) or the second throttling component (22) exceeds the opening threshold, then it is determined that at least one of the throttling components needs to be inspected.

6. The detection method according to claim 5, characterized in that, The first temperature detector (31) corresponding to the first throttling component (21) is a temperature detector disposed on the same pipeline as the first throttling component (21); and / or, The second temperature detector (32) corresponding to the second throttling component (22) is a temperature detector that is installed on the same pipeline as the second throttling component (22).

7. The detection method according to claim 6, characterized in that, The methods for determining whether the system in which the heat exchanger (1) is located is in a refrigerant-storage state include: When the heat exchanger (1) is running, if the temperature values ​​of the first temperature detector (31) and the second temperature detector (32) are both less than the threshold T1+t, then the system is determined to be in a refrigerant storage state; where T1 is the ambient temperature and t is the set value.

8. The detection method according to claim 6, characterized in that, Methods for determining whether at least one of the throttling components is out of control include: The first throttling component (21) is set to the maximum opening, and the second throttling component (22) is set to the preset opening. After the heat exchanger (1) has been running for a period of time, the opening of the second throttling component (22) is reduced; If the temperature value of the second temperature detector (32) decreases and the temperature value of the first temperature detector (31) increases, it is determined that the second throttling component (22) is not out of control; otherwise, it is determined that the second throttling component (22) is out of control.

9. The detection method according to claim 1, characterized in that, The heat exchanger structure also includes: Upper liquid collection assembly (51), the upper liquid collection assembly (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 assembly (51); The lower liquid collection assembly (52) is located below the upper liquid collection assembly (51). The lower liquid collection assembly (52) is connected to the heat exchanger (1). The second heat exchange pipeline is connected to the heat exchanger (1) through the lower liquid collection assembly (52).

10. An air conditioning system suitable for the detection method as described in any one of claims 1 to 8.

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