A HVAC circulation pipeline water leakage monitoring system and control method

Abstract

The present invention discloses a HVAC circulation pipeline water leakage monitoring system and control method, belonging to the field of HVAC water leakage monitoring. The control method comprises: in response to a user's adaptive adjustment request, storing the flow value of the water supply pipeline and the return pipeline and the current time at intervals of a first set time, until a non-leakage state database is formed after a second set time; receiving the real-time flow on the water supply pipeline and the return pipeline, and determining whether the HVAC circulation pipeline has a water leakage risk based on the real-time flow compared with the non-leakage state database. The present invention solves the problem that the existing HVAC circulation pipeline water leakage monitoring system has an inaccurate water leakage risk judgment.

Description

Technical Field

[0001] The invention relates to the technical field of HVAC circulating water systems, and in particular to a HVAC circulating pipeline leakage monitoring system and method. Background Art

[0002] As people's demand for air quality in their living and working environments gradually increases, capillary air conditioning, floor heating, and centralized domestic hot water are gradually becoming popular in new buildings. However, this HVAC circulating water system has the risk of water leakage. Due to the fact that many water pipe interfaces are not tightly connected during installation, aging caused by long-term use, and occasional excessive system pressure, water leakage often occurs at home. If no one at home handles it immediately, large-scale water leakage will occur, and even public equipment or neighbor's houses will be flooded, causing huge economic losses.

[0003] In the existing HVAC circulating water leakage monitoring system, the flow difference is usually obtained by subtracting the real-time flow value of the supply and return water. When the flow difference is greater than the set threshold, it is considered that there is a risk of leakage, an alarm is issued, and the water supply is stopped for maintenance. However, since the existing circulating water leakage monitoring system does not take into account the data deviation caused by the water meter itself, the installation process, and the different water pressures of the water supply at different times, the above leakage judgment is not accurate enough after the circulation system has been running for a period of time, resulting in poor leakage protection effect of the leakage monitoring system. Summary of the invention

[0004] To this end, the present invention proposes a HVAC circulation pipeline water leakage monitoring system and a control method which can adaptively determine the water leakage situation.

[0005] In view of the above technical problems, the present invention provides the following technical solutions:

[0006] A control method for a water leakage monitoring system for a heating and ventilation circulation pipeline comprises: in response to a user's adaptive adjustment request, storing flow values ​​of a water supply pipeline and a water return pipeline at intervals of a first set time and forming a water-free state database at the current moment; receiving real-time flow rates on the water supply pipeline and the water return pipeline, and determining whether the heating and ventilation circulation pipeline has a water leakage risk based on the real-time flow rate compared with the water-free state database.

[0007] In some embodiments of the present invention, determining whether the HVAC circulation pipeline has a risk of water leakage based on comparing the real-time flow rate with the no-leakage status database specifically includes: using the maximum flow difference in the no-leakage status database as a first set threshold, and when the real-time flow difference received on the water supply pipeline and the return pipeline is greater than the first set threshold, it is determined that the HVAC circulation pipeline has a risk of water leakage.

[0008] In some embodiments of the present invention, determining whether the HVAC circulation pipeline has a risk of water leakage based on comparing the real-time flow rate with the non-leakage status database specifically includes: receiving the duration of the real-time flow difference between the water supply pipeline and the return pipeline, and taking the maximum duration of the same flow difference in the non-leakage status database as a second set threshold; when the duration of the real-time flow difference between the water supply pipeline and the return pipeline is greater than the second set threshold, it is determined that the HVAC circulation pipeline has a risk of water leakage.

[0009] In some implementations of the present invention, in response to a user's request for sensitivity adjustment, it is ultimately determined whether the HVAC circulation pipeline is leaking based on different sensitivity levels selected by the user and whether there is a current risk of water leakage.

[0010] In some embodiments of the present invention, the sensitivity gear includes one or more of a first gear, a second gear, and a third gear;

[0011] Wherein, in the first gear, after determining that the HVAC circulation pipeline has a risk of water leakage, it is determined again whether the HVAC circulation pipeline has a risk of water leakage after a third set time interval; when it is determined again that there is a risk of water leakage, it is determined that the HVAC circulation pipeline has a water leakage;

[0012] In the second gear, after it is determined that the HVAC circulation pipeline has a risk of water leakage, it is determined again whether the HVAC circulation pipeline has a risk of water leakage after a fourth set time interval; wherein, the fourth set time interval is shorter than the third set time interval, and when it is determined again that there is a risk of water leakage, it is determined that the HVAC circulation pipeline is leaking.

[0013] In the third gear, after it is determined that the HVAC circulation pipeline has a risk of water leakage, it is directly determined that the HVAC circulation pipeline is leaking.

[0014] In some embodiments of the present invention, when it is determined that the HVAC circulation pipeline is leaking, the switch valve on the water supply pipeline is controlled to be closed, and the alarm device is controlled to be started; when the leakage fault is eliminated, in response to the user's reset request, the switch valve on the water supply pipeline is controlled to be opened, the alarm device is controlled to be closed, and the normal operating mode is restored.

[0015] The present invention also provides a HVAC circulation pipeline leakage monitoring system, comprising: a flow monitoring device installed on a water supply pipeline and a water return pipeline, for detecting real-time flow values ​​on the water supply pipeline and the water return pipeline; a control panel and a controller, wherein an adaptive button is provided on the control panel, and the controller comprises a storage unit, and after the adaptive button is selected, the controller controls the storage unit to store the flow values ​​of the water supply pipeline and the water return pipeline at intervals of a first set time and to form a non-leakage state database at the current moment; the controller is also used to compare the real-time flow value detected by the flow monitoring device with the non-leakage state database to determine whether there is a risk of leakage in the HVAC circulation pipeline.

[0016] In some embodiments of the present invention, the control panel further includes a sensitivity selection switch, and the controller determines whether the HVAC circulation pipeline is leaking according to the gear selection of the sensitivity selection switch and whether there is currently a risk of water leakage.

[0017] In some implementation modes of the present invention, the flow monitoring device includes a first water meter disposed on the water supply pipeline and a second water meter disposed on the water return pipeline.

[0018] In some implementation modes of the present invention, a switch valve is provided on the water supply pipeline, and a check valve is provided on the water return pipeline.

[0019] The technical solution of the present invention has the following technical effects compared with the prior art:

[0020] In the control method of the HVAC circulation pipeline leakage monitoring system provided by the present invention, adaptive adjustment can be made according to user needs after the initial operation or daily maintenance of the monitoring system, so that the non-leakage status database of the monitoring system is updated according to the system usage, avoiding the problem in the prior art that a constant constant is used as the flow difference threshold under normal conditions, resulting in excessive deviation from the flow difference under normal conditions after the circulation pipeline has been used for a period of time, resulting in inaccurate leakage risk judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the objects and advantages of the present invention, wherein:

[0022] Figure 1 The system structure diagram of the HVAC circulation pipeline water leakage monitoring system of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the HVAC circulation pipeline of the present invention;

[0024] Figure 3 The present invention is a flow chart of a control method of a HVAC circulation pipeline water leakage monitoring system. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Embodiment 1

[0030] like Figure 1 The figure shows a specific implementation of the HVAC circulation pipeline leakage monitoring system of the present invention (hereinafter referred to as the leakage monitoring system), including: a flow monitoring device installed on the water supply pipeline A and the return pipeline B, used to detect the real-time flow values ​​on the water supply pipeline A and the return pipeline B; a control panel 20 and a controller 10, the control panel 20 is provided with an adaptive switch 30, the controller 10 includes a storage unit, after the adaptive switch 30 is selected, the controller 10 controls the storage unit to store the flow values ​​of the water supply pipeline A and the return pipeline B at intervals of a first set time and form a non-leakage state database at the current moment; the controller 10 is also used to determine whether the HVAC circulation pipeline has a risk of leakage based on the real-time flow value detected by the flow monitoring device compared with the non-leakage state database.

[0031] In the above-mentioned water leakage monitoring system, an adaptive switch 30 is set on the control panel 20. After the user selects the adaptive switch 30, the flow values ​​of the water supply pipeline A and the return pipeline B in the normal state (non-leakage state) in the circulation pipeline, as well as the time values ​​of the flow values, are stored to form a non-leakage state database; when the adaptive adjustment request is completed, for example, by selecting the end adaptive adjustment button and other operations, the system starts to supply water normally, and the real-time flow on the water supply pipeline A and the return pipeline B is compared with the non-leakage state database to finally determine whether the circulation pipeline has a leakage risk. This control method can be adaptively adjusted according to user needs after the initial operation or routine maintenance of the monitoring system, so that the non-leakage state database of the monitoring system is updated according to the system usage, avoiding the problem that the prior art uses a constant constant as the flow difference threshold under the normal state, resulting in a large deviation from the flow difference under the normal state after the circulation pipeline has been used for a period of time, resulting in inaccurate judgment of the leakage risk.

[0032] Specifically, the flow monitoring device includes a first water meter 61 installed on the water supply pipeline A and a second water meter 62 installed on the return pipeline B, and obtains real-time flow data through time differential calculation. The first water meter 61 and the second water meter 62 are counting direct reading remote water meters, which are composed of a meter body and a remote direct reading module; the remote water meter has a power supply voltage of DC24V, a protection level of IP65, and uses a 485 interface MODBUS protocol to communicate with the controller 10.

[0033] like Figure 2 As shown, a switch valve 70 is also provided on the water supply pipeline A, and a check valve 90 is provided on the return water pipeline B, wherein the circulating water passes through the first water meter 61, and then passes through the switch valve 70 to enter the user terminal pipeline, and the return water first passes through the check valve 90, and then flows through the second water meter 62 to the water supply unit for the next circulation.

[0034] In order to meet the different sensitivity requirements for water leakage judgment, the control panel 20 also includes a sensitivity switch 40, and the sensitivity switch 40 is set to at least two gears, such as a first gear representing a lower sensitivity, a second gear representing a medium sensitivity, and a third gear representing a higher sensitivity. The controller 10 determines whether the HVAC circulation pipeline is leaking according to the gear selection of the sensitivity switch 40 and whether there is a water leakage risk at present. For example, when the user selects the first gear, the monitoring system determines that there is a water leakage risk after two judgments with an interval of the third time length, and finally determines that the system is leaking; when the user selects the second gear, the monitoring system determines that there is a water leakage risk after two judgments with an interval of the fourth time length, and finally determines that the system is leaking; wherein the fourth time length is less than the third time length. When the user selects the third gear, the monitoring system directly determines that there is a water leakage after determining that there is a water leakage risk.

[0035] The water leakage monitoring system further includes an alarm device 80, and the control panel 20 further includes a reset button 50. When the controller 10 determines that the water leakage monitoring system is leaking, the controller 10 controls the switch valve 70 on the water supply pipeline A to close, and controls the alarm device 80 to start. When the water leakage fault is eliminated, after the user selects the reset button, the controller 10 controls the switch valve 70 on the water supply pipeline A to open, and controls the alarm device 80 to close, and returns to the normal operation mode.

[0036] Embodiment 2

[0037] A specific implementation of a control method for a HVAC circulation pipeline water leakage monitoring system of the present invention includes:

[0038] In response to the user's adaptive adjustment request, the flow values ​​of the water supply pipeline A and the return pipeline B and the current time are stored at intervals of a first set time until a no-leakage status database is formed after a second set time; the real-time flow on the water supply pipeline A and the return pipeline B is received, and whether the HVAC circulation pipeline has a risk of leakage is determined based on the real-time flow compared with the no-leakage status database.

[0039] In the control method of the above-mentioned water leakage monitoring system, by responding to the user's adaptive adjustment request, the flow values ​​of the water supply pipeline A and the return pipeline B in the normal state (non-leakage state) in the circulation pipeline, as well as the time values ​​of the flow values, are stored to form a non-leakage state database; after the system operates normally, the real-time flow on the water supply pipeline A and the return pipeline B is compared with the leakage state database to finally determine whether the circulation pipeline has a leakage risk. This control method can be adaptively adjusted according to user needs after the initial operation or routine maintenance of the monitoring system, so that the non-leakage state database of the monitoring system is updated according to the system usage, avoiding the problem that the prior art uses a constant constant as the flow difference threshold under the normal state, resulting in a large deviation from the flow difference in the normal state after the circulation pipeline has been used for a period of time, resulting in inaccurate judgment of the leakage risk.

[0040] Specifically, as shown in Table 1, the water leakage status database includes the flow value and time of the water supply pipeline A, and the flow value and time of the water return pipeline B. More specifically, the flow value of the water supply pipeline A and the flow value of the water return pipeline B are stored at intervals of 10-20 seconds until more than 24 hours, so that the flow values ​​of the water supply pipeline A and the water return pipeline B at different times of the day can be monitored.

[0041] Table 1 Example of non-leakage status database

[0042] Monitoring time 9:00 9:10 9:20 9:30 9:40 9:50 10:00 10:10 10:20 10:30 Water supply line A flow 10.01 9.92 9.89 9.85 9.84 9.82 9.82 9.81 9.8 9.82 Return pipe B flow 9.81 9.75 9.71 9.71 9.69 9.65 9.64 9.61 9.59 9.58 Poor flow 0.2 0.17 0.18 0.14 0.15 0.17 0.18 0.2 0.21 0.24

[0043] Specifically, there is no unique way to determine whether the HVAC circulation pipeline has a risk of water leakage based on the comparison between the real-time flow and the non-leakage state database; in a specific implementation, the maximum flow difference in the non-leakage state database is used as the first set threshold, and when the real-time flow difference between the water supply pipeline A and the return pipeline B is greater than the first set threshold, it is determined that the HVAC circulation pipeline has a risk of water leakage. Among them, the maximum flow difference can be the group with the largest flow difference compared with multiple groups of flow differences between the water supply pipeline A and the return pipeline B collected at the same time; the maximum flow difference can also be the ratio of the maximum flow value of the water supply pipeline A to the minimum flow value of the return pipeline B in all the flow data of the water supply pipeline A and the return pipeline B within the second set time.

[0044] In another specific implementation, determining whether the HVAC circulation pipeline is leaking based on the comparison of the real-time flow rate with the non-leakage status database specifically includes: receiving the duration of the real-time flow difference between the water supply pipeline A and the return pipeline B, and taking the maximum duration of the same flow difference in the non-leakage status database as a second set threshold; when the duration of the real-time flow difference between the water supply pipeline A and the return pipeline B is greater than the second set threshold, it is determined that the HVAC circulation pipeline has a risk of leakage.

[0045] Specifically, in order to further adjust the sensitivity of the water leakage judgment, the control method further includes responding to the user's sensitivity gear request, and finally determining whether the HVAC circulation pipeline is leaking according to the sensitivity gear and whether there is a water leakage risk at present. The user can control the monitoring system to perform one or more water leakage risk judgments by setting the sensitivity gear.

[0046] Specifically, the sensitivity gear includes one or more of a first gear, a second gear and a third gear; wherein, in the first gear, after determining that the HVAC circulation pipeline has a risk of water leakage, after a third set time interval, it is determined again whether the HVAC circulation pipeline has a risk of water leakage; when it is determined again that there is a risk of water leakage, it is determined that the HVAC circulation pipeline is leaking;

[0047] In the second gear, after it is determined that the HVAC circulation pipeline has a risk of water leakage, it is determined again after a fourth set time period whether the HVAC circulation pipeline has a risk of water leakage; wherein the fourth set time period is less than the third set time period, for example, the third set time period is 5 minutes, and the fourth set time period is 2 minutes. When it is determined again that there is a risk of water leakage, it is determined that the HVAC circulation pipeline is leaking.

[0048] In the third gear, after it is determined that the HVAC circulation pipeline has a risk of water leakage, it is directly determined that the HVAC circulation pipeline is leaking.

[0049] When it is determined that the HVAC circulation pipeline is leaking, the switch valve 70 on the water supply pipeline A is controlled to be closed, and the alarm device 80 is controlled to be started; when the leakage fault is eliminated, in response to the user's reset request, the switch valve 70 on the water supply pipeline A is controlled to be opened, the alarm device 80 is controlled to be closed, and the normal operating mode is restored.

[0050] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A HVAC circulation pipeline water leakage monitoring system, characterized in that: include: The flow monitoring device installed on the water supply pipeline and the return pipeline is used to detect the real-time flow value on the water supply pipeline and the return pipeline; A control panel and a controller, wherein the control panel is provided with an adaptive button, and the controller includes a storage unit. After the adaptive button is selected, the controller controls the storage unit to store the flow values ​​of the water supply pipeline and the return pipeline at intervals of a first set time and the current time to form a non-leakage state database; The controller is also used to compare the real-time flow value detected by the flow monitoring device with the non-leakage state database to determine whether the HVAC circulation pipeline has a risk of leakage; specifically including: The maximum flow difference in the non-leakage state database is used as a first set threshold value, and when the real-time flow difference between the water supply pipeline and the return pipeline is greater than the first set threshold value, it is determined that the HVAC circulation pipeline has a risk of leakage; or, The duration of the real-time flow difference between the water supply pipeline and the return pipeline is received, and the maximum duration of the same flow difference in the non-leakage state database is used as the second set threshold. When the duration of the real-time flow difference between the water supply pipeline and the return pipeline is greater than the second set threshold, it is determined that the HVAC circulation pipeline has a risk of leakage.

2. A HVAC circulation pipeline water leakage monitoring system according to claim 1, characterized in that: The control panel also includes a sensitivity selection switch, and the controller determines whether the HVAC circulation pipeline is leaking according to the gear selection of the sensitivity selection switch and whether there is a current risk of water leakage.

3. A HVAC circulation pipeline water leakage monitoring system according to claim 2, characterized in that: The sensitivity gear position of the sensitivity selection switch includes one or more of a first gear position, a second gear position and a third gear position; Wherein, in the first gear, after determining that the HVAC circulation pipeline has a risk of water leakage, it is determined again whether the HVAC circulation pipeline has a risk of water leakage after a third set time interval; when it is determined again that there is a risk of water leakage, it is determined that the HVAC circulation pipeline has a water leakage; In the second gear, after determining that the HVAC circulation pipeline has a risk of water leakage, it is determined again whether the HVAC circulation pipeline has a risk of water leakage after a fourth set time interval; wherein the fourth set time is less than the third set time, and when it is determined again that there is a risk of water leakage, it is determined that the HVAC circulation pipeline has a water leakage; In the third gear, after it is determined that the HVAC circulation pipeline has a risk of water leakage, it is directly determined that the HVAC circulation pipeline is leaking.

4. A HVAC circulation pipeline water leakage monitoring system according to claim 1, characterized in that: The flow monitoring device includes a first water meter arranged on the water supply pipeline and a second water meter arranged on the water return pipeline.

5. A HVAC circulation pipeline water leakage monitoring system according to claim 1, characterized in that: A switch valve is arranged on the water supply pipeline, and a check valve is arranged on the water return pipeline.

6. A HVAC circulation pipeline water leakage monitoring system according to claim 5, characterized in that: After the controller determines that the HVAC circulation pipeline is leaking, it controls the switch valve on the water supply pipeline to close and controls the alarm device to start; when the water leakage fault is eliminated, in response to the user's reset request, the controller controls the switch valve on the water supply pipeline to open, controls the alarm device to close, and returns to normal operating mode.

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