CN112303925A - Detection system for detecting zero cold water performance of water heater and control method - Google Patents
Detection system for detecting zero cold water performance of water heater and control method Download PDFInfo
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Abstract
The invention discloses a detection system and a control method for detecting the zero cold water performance of a water heater, wherein the detection system comprises at least one detection device, a timing device and a control device, the detection device is arranged on a circulating pipeline of the water heater and forms a test point, the detection system comprises a temperature detection unit for detecting the water temperature value of the test point and a water flow switch unit for controlling the water flow on-off of the test point, the timing device is used for recording the water temperature stabilization time of the test point, and the control device is respectively and electrically connected with the temperature detection unit, the water flow switch unit and the timing device. According to the detection system, at least one detection device is arranged on the water heater circulation pipeline, and the detection device, the timing device and the control device are matched, so that the water temperature stability time and the water temperature fluctuation index of the water heater can be fully automatically tested, the zero cold water performance of the water heater can be tested, and the accuracy is high.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a detection technology for zero cold water performance of a water heater.
Background
The existing zero-cold-water gas water heater is a constant-temperature gas water heater, a user starts an instant heating button, a water pump starts to work, the gas water heater detects a water flow signal, a fan is started to clean the water flow signal, waste gas in the water heater is discharged through a smoke tube, an air pressure switch detects the closing of the air pressure switch, an air valve is opened again to ignite and burn, and water flows out of the water heater after being circularly heated in a pipeline through the water pump. When a user boils and flows out hot water at a constant temperature, the time required by different water heaters is different through a plurality of links. In addition, under the influence of pipelines with different lengths, the temperature fluctuation conditions have larger difference, and different designs of the internal structure of the water heater and related control algorithms have larger influence on the temperature fluctuation conditions.
When the zero-cold-water gas water heater is tested, relevant important parameters of all links are not tested comprehensively. Most of the tests are simple manual tests, and the test consistency and accuracy are poor.
Disclosure of Invention
The invention aims to solve one of the problems in the prior related art at least to a certain extent, and therefore, the invention provides a detection system for detecting the zero cold water performance of a water heater, which can fully automatically test the water temperature stabilization time and the water temperature fluctuation index of the water heater, thereby realizing the zero cold water performance test of the water heater and having high accuracy.
The invention also provides a control method of the detection system.
According to the detection system for detecting the zero cold water performance of the water heater, the detection system is realized through the following technical scheme:
a detection system for detecting zero cold water performance of a water heater, comprising: the detection device is arranged on the water heater circulating pipeline and forms a test point, and the detection device comprises a temperature detection unit and a water flow switch unit, wherein the temperature detection unit is used for detecting the water temperature value of the test point, and the water flow switch unit is used for controlling the on-off of water flow of the test point; the timing device is used for recording the water temperature stabilizing time of the test point; the control device is respectively and electrically connected with the temperature detection unit, the water flow switch unit and the timing device, and is used for acquiring a water temperature fluctuation value according to a detected water temperature value and determining the zero cold water performance of the water heater according to the water temperature fluctuation value and the water temperature stabilization time.
In some embodiments, the detection device further comprises a water flow detection unit for detecting the water flow value of the test point, and the water flow detection unit is electrically connected with the control device.
In some embodiments, the water heater further comprises an exhaust device and/or a water regulating device, wherein the exhaust device is installed on the circulation pipeline of the water heater and is electrically connected with the control device, and the water regulating device is installed at the water inlet of the water heater and is electrically connected with the control device.
In some embodiments, the device further comprises a display device, and the display device is electrically connected with the control device.
In some embodiments, the number of the detection devices is four, and four detection devices are arranged on different positions of the circulating pipeline of the water heater and form four test points.
According to the control method of the detection system, the control method is realized through the following technical scheme:
a control method of a detection system, which applies the detection system for detecting the zero cold water performance of a water heater, the control method comprises the following steps:
s1: discharging redundant air in a circulating pipeline of the water heater;
s2: controlling the water heater to start an instant heating mode;
s3: judging whether the instant heating of the water heater is finished, if so, entering the next step, otherwise, continuing to execute the step;
s4: opening a water flow switch unit of a first test point, starting to record the water temperature stabilization time T1 of the first test point, and acquiring a water temperature fluctuation value delta T1 of the first test point;
s5: and determining the zero cold water performance of the water heater according to the water temperature stabilization time T1 and the water temperature fluctuation value delta T1 of the first test point.
In some embodiments, the acquiring a water temperature fluctuation value Δ T1 of the first test point specifically includes:
s41: after the water flow switch unit is turned on for a period of time, collecting the water temperature value once every preset time interval, and collecting N times to obtain a temperature data set;
s42: extracting a maximum value and a minimum value from the temperature data set;
s43: and calculating the water temperature fluctuation value delta T1 of the first test point according to the maximum value and the minimum value.
In some embodiments, at the same time of acquiring the water temperature fluctuation value Δ T1 of the first test point, the water flow rate data set of the test point is acquired by the water flow detection unit, and then the average water flow rate value Q1 is calculated according to the acquired water flow rate data set.
In some embodiments, in step S5, the determining zero cold water performance of the water heater according to the water temperature stabilization time T1 and the water temperature fluctuation value Δ T1 of the first test point specifically includes:
s51: judging whether the water temperature stabilizing time T1 is greater than a reference value or not, and judging whether the water temperature fluctuation value delta T1 is greater than a temperature threshold value or not;
s52: if the water temperature stabilization time T1 is less than or equal to the reference value and the water temperature fluctuation value delta T1 is less than or equal to the temperature threshold value, determining that the zero cold water performance of the water heater is qualified;
s53: and if the water temperature stabilization time T1 is larger than the reference value and/or the water temperature fluctuation value delta T1 is larger than the temperature threshold value, determining that the zero cold water performance of the water heater is unqualified.
In some embodiments, the control method further comprises the steps of:
s6: repeating steps S1 through S3;
s7: when the instant heating of the water heater is finished, a water flow switch unit of a second test point is opened, the water temperature stabilization time T2 of the second test point is recorded, and the water temperature fluctuation value delta T2 of the second test point is obtained;
s8: and determining the zero cold water performance of the water heater according to the water temperature stabilization time T2 and the water temperature fluctuation value delta T2 of the second test point.
Compared with the prior art, the invention at least comprises the following beneficial effects:
1. the detection system of the invention can automatically test the zero cold water performance of the water heater by installing at least one detection device on the circulating pipeline of the water heater and forming at least one test point and matching the detection device, the timing device and the control device;
2. the control device can determine the zero cold water performance of the water heater according to the acquired water temperature fluctuation value and the acquired water temperature stabilization time, so that the water temperature stabilization time and the water temperature fluctuation index of the full-automatic water heater can be tested, the zero cold water performance of the water heater can be tested, and the accuracy is high.
Drawings
Fig. 1 is a connection block diagram of a detection system in embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a detection system installed on a circulation pipeline of a water heater in embodiment 1 of the invention;
fig. 3 is a flowchart of a control method of the detection system in embodiment 2 of the present invention;
fig. 4 is a sub-flowchart in step S4;
fig. 5 is a sub-flowchart in step S5;
fig. 6 is a flowchart of a control method of the detection system in embodiment 3 of the present invention.
Detailed Description
The present invention is illustrated by the following examples, but the present invention is not limited to these examples. Modifications to the embodiments of the invention or equivalent substitutions of parts of technical features without departing from the spirit of the invention are intended to be covered by the scope of the claims of the invention.
Example 1
Referring to fig. 1-2, the present embodiment provides a detection system for detecting zero cold water performance of a water heater, including at least one detection device 1, a timing device 2 and a control device 3, wherein the detection device 1 is installed on a circulation pipeline (not shown in the figure) of the water heater and forms a test point, and the detection device 1 includes a temperature detection unit 11 and a water flow switch unit 12, the temperature detection unit 11 is configured to detect a water temperature value at the test point, and the water flow switch unit 12 is configured to control water flow on/off at the test point. The timing device 2 is used for recording the water temperature stabilization time of the test point. The control device 3 is electrically connected with the temperature detection unit 11, the water flow switch unit 12 and the timing device 2 respectively, and the control device 3 is used for acquiring a water temperature fluctuation value according to the detected water temperature value and determining the zero cold water performance of the water heater according to the water temperature fluctuation value and the water temperature stabilization time. In addition, the control device 3 can also be electrically connected with a controller of the water heater to realize that the working state of the water heater is controlled by the control device 3. In this embodiment, the electrical connection includes an electrical connection and a communication connection, wherein the communication connection includes a wireless communication connection and a wired communication connection.
It can be seen that, in the detection system of the embodiment, at least one detection device 1 is installed on the water heater circulation pipeline, at least one test point is formed, and the zero cold water performance of the water heater can be automatically tested through the cooperation of the detection device 1, the timing device 2 and the control device 3. In addition, the control device 3 can determine the zero cold water performance of the water heater according to the acquired water temperature fluctuation value and the acquired water temperature stabilization time, so that the water temperature stabilization time and the water temperature fluctuation index of the full-automatic water heater can be tested, the zero cold water performance of the water heater can be tested, and the accuracy is high.
Preferably, the detection device 1 further includes a water flow detection unit 13, the water flow detection unit 13 is electrically connected to the control device 3 and is configured to detect the water flow values of the test points, and the control device 3 can calculate the average water flow value of the test points according to the plurality of water flow values, so as to accurately detect the water flow values of the test points.
Referring to fig. 2, specifically, the water heater is a zero-cold water gas water heater, which includes an internal pipeline 70, a water inlet 71, a hot water outlet 72, a water inlet temperature probe 73, a water outlet temperature probe 74, a circulating pump 75 and a controller (not shown in the figure), wherein two ends of the internal pipeline 70 are respectively connected to the water inlet 71 and the hot water outlet 72, the water inlet temperature probe 73 and the water outlet temperature probe 74 are respectively installed on a water inlet section and a water outlet section of the internal pipeline 70, the circulating pump 75 is installed on the water inlet section of the internal pipeline 70, and the controller is respectively electrically connected to the water inlet temperature probe 73, the water outlet temperature probe 74 and the circulating pump 75. Specifically, the water heater circulation pipeline is composed of an external hot water pipe 81, a water return pipe 82 and an external cold water pipe 83, one end of the external hot water pipe 81 is communicated with the hot water outlet 72, the other end of the external hot water pipe is communicated with the external cold water pipe 83 through the water return pipe 82, and one end of the external cold water pipe 83 far away from the water return pipe 82 is communicated with the water inlet 71.
Referring to fig. 1-2, further, the testing device further comprises an exhaust device 4 and a water transfer device 5, wherein the exhaust device 4 is installed on the water heater circulation pipeline and electrically connected with the control device 3, and can be used for exhausting redundant air in the water heater circulation pipeline, so that the air in the circulation pipeline can be prevented from interfering with the testing result, and the testing accuracy of the zero-cold-water performance of the water heater is higher. The water transfer device 5 is installed at a water inlet of the water heater and electrically connected with the control device 3, and is used for adjusting the water inlet flow of the water heater, so that the water inlet flow of the water heater can be adjusted through the water transfer device 5 according to actual requirements, the water temperature stability time and the water temperature fluctuation performance index can be respectively tested in different environments (different water flows and the like), and the self-adaptability of the detection system is improved.
In this embodiment, the water diversion device 5 is installed at the water inlet 71 of the water heater, and the air exhaust device 4 is installed on the external cold water pipe 83 and close to the water diversion device 5. In other embodiments, the air exhaust device 4 or the water diversion device 5 can be omitted, so that the overall structure of the detection system is simpler and the cost is lower.
Further, the device also comprises a display device 6, and the display device 6 is electrically connected with the control device 3. Preferably, the display device 6 of the present embodiment is a PC computer in communication connection with the control device 3, and is used for outputting and storing the test data, so as to facilitate the later checking of all the test data, such as the water temperature fluctuation value, the average water flow rate and the water temperature stabilization time.
Referring to fig. 2, preferably, the number of the detection devices 1 is four, four detection devices 1 are installed at different positions of the circulation pipeline of the water heater and form four test points, and each detection device 1 comprises a temperature detection unit 11, a water flow switch unit 12 and a water flow detection unit 13 which are respectively and electrically connected with the control device 3. Specifically, the first detecting unit 1 is installed on the outer hot water pipe 81 at a position approximately ten meters away from the hot water outlet 72 of the outer hot water pipe 81. The second detecting device 1 is installed on the water return pipe 82, and the distance between the second detecting device 1 and the first detecting device 1 is about 10 meters. The third detection device 1 is installed on the external cold water pipe 83, and the distance between the third detection device 1 and the second detection device 1 is about 10 meters. The fourth sensing device 1 is mounted on the external cold water pipe 83 near the water inlet 71. From this, four detection device 1 are located water heater circulation pipeline's different positions respectively and form four test points to can the multiple spot, test repeatedly many times, the degree of accuracy is higher, applicable in different use scenes.
Example 2
Referring to fig. 3, the present embodiment provides a control method of a detection system, which applies the detection system for detecting zero cold water performance of a water heater described in embodiment 1, and the control method includes the following steps:
s1: discharging redundant air in a circulating pipeline of the water heater;
specifically, the surplus air may be discharged by turning on the air discharging device 4, or by turning on the water flow switching unit 12 of the fourth test point. The embodiment is exemplified by discharging the surplus air through the water flow switching unit 12 of the fourth test point. After the water heater to be detected is correctly connected with gas, electricity and water, the detection system is arranged on a water heater circulation pipeline; after the power-on, the water flow switch unit 12 of the fourth test point is controlled to be opened to discharge the surplus air in the pipeline, and after 3 minutes, the water flow switch unit 12 of the fourth test point is controlled to be closed.
S2: controlling the water heater to start an instant heating mode;
specifically, the water heater is controlled to be turned on in the instant heating mode by the controller or control device 3 of the water heater to enter the instant heating control mode.
S3: judging whether the instant heating of the water heater is finished, if so, entering the next step, otherwise, continuing to execute the step;
s4: opening the water flow switch unit 12 of the first test point, starting to record the water temperature stabilization time T1 of the first test point, and acquiring the water temperature fluctuation value delta T1 of the first test point;
specifically, one of the four test points is selected as a first test point, and for convenience of understanding, in this embodiment, the test point close to the hot water outlet 72 of the water heater is taken as the first test point, and so on according to the water flow direction, and the test point far away from the hot water outlet 72 of the water heater (i.e., close to the water inlet 71 of the water heater) is taken as the last test point.
The present embodiment exemplifies the first test point being the test point near the hot water outlet 72 of the water heater. The control device 3 controls the water flow switch unit 12 of the first test point to be opened, hot water flows out from the water flow switch unit 12, simultaneously, the timing device 2 starts to record the water temperature stabilization time T1 of the first test point, and the control device 3 obtains the water temperature fluctuation value Δ T1 of the first test point through the temperature detection unit 11.
S5: and determining the zero cold water performance of the water heater according to the water temperature stabilization time T1 and the water temperature fluctuation value delta T1 of the first test point.
Therefore, in the control method of the detection system of the embodiment, after the water heater is instantly heated, the zero cold water performance of the water heater is determined by acquiring the water temperature stabilization time T1 and the water temperature fluctuation value Δ T1 of the first test point and according to the acquired water temperature stabilization time T1 and the acquired water temperature fluctuation value Δ T1, so that important indexes such as the water temperature fluctuation value and the water temperature stabilization time of the water outlet of a user can be automatically tested, and the qualification condition of the zero cold water performance of the water heater can be accurately tested.
Preferably, the water temperature stabilization time t1 is a time from the time the water flow switch unit 12 of the first test point is turned on to the time the value of the water temperature at the first test point reaches a stabilization value. The smaller the water temperature stabilization time t1 is, the better the performance is, and if the longer the time is, the greater the correlation with the constant temperature control after boiling water is, the constant temperature control after boiling water needs to be properly improved so as to ensure the quick constant temperature effect of the water heater. Specifically, the temperature detection unit 11 detects the real-time temperature of the water flow at the first test point in real time and feeds the real-time temperature back to the control device 3, when the control device 3 determines that the real-time temperature of the water flow at the first test point is stable within the range of [ T set-1, T set +1], the water temperature stabilization time T1 of the test point is stored, the stored water temperature stabilization time T1 is compared with a reference value, the water temperature stabilization time performance condition of the test point is determined based on the comparison result, and finally, a report is output through the control display device 6.
Referring to fig. 4, preferably, in step S4, the acquiring a water temperature fluctuation value Δ T1 of a first test point specifically includes:
s41: after the water flow switch unit 12 is turned on for a period of time, starting to collect the water temperature value once, and collecting N times to obtain a temperature data set;
specifically, when the water flow switch unit 12 of the first test point is turned on, the first test point is boiled, and after the first test point is boiled for 10 seconds, the water temperature value is collected once, and the temperature data set is obtained by collecting for N times. Wherein gather water temperature value once, specifically include: the temperature collected once every preset time (for example 100ms) is respectively measured as a 0, a 1, …, a 9, the maximum value and the minimum value are removed, an average value T0 is obtained in 1s, the average value T0 is the water temperature value to be collected, thus, the water temperature value collected every time is more accurate, and the accuracy of data collection is improved. The temperature data set is obtained by collecting 100 times, and the temperature data set is composed of T0, T1, … and T99.
S42: extracting a maximum value and a minimum value from the temperature data set;
specifically, maximum and minimum values are extracted from T0, T1, …, T99.
S43: and calculating the water temperature fluctuation value delta T1 of the first test point according to the maximum value and the minimum value.
Specifically, from the extracted maximum and minimum values, by the formula: and (4) calculating the water temperature fluctuation value delta T1 of the first test point when the temperature fluctuation value delta T is the maximum value-the minimum value. Therefore, the water temperature fluctuation value delta T1 of the test point can be accurately tested.
Preferably, when the water temperature fluctuation value Δ T1 of the first test point is obtained, the water flow data set of the test point is obtained by the water flow detection unit 13, and then the average water flow value Q1 is calculated according to the obtained water flow data set. Specifically, the acquiring of the water flow data set of the test point by the water flow detection unit 13 specifically includes: after boiling water for 10s at a first test point, collecting water flow once every 100ms and respectively counting as L0, L1, … and L9, removing a maximum numerical value and a minimum numerical value, and calculating an average value Q0, namely calculating water flow data in 1s, so that the water flow data collected every time can be ensured to be more accurate, and the accuracy of the collected data is improved; recording 100 times to obtain the water flow data group of test point, said water flow data group is formed from Q0, Q1, … and Q99.
In addition, the average water flow value Q1 is calculated according to the acquired water flow data set, and specifically includes: the maximum water flow value and the minimum water flow value are removed from the water flow data group, namely Q0, Q1, … and Q99, and the average water flow value Q1 of the first test point is calculated through an averaging formula, so that the calculated average water flow value Q1 is more accurate by removing the maximum water flow value and the minimum water flow value in the water flow data group and then calculating the average value of the rest data.
Referring to fig. 5, preferably, in step S5, the determining zero cold water performance of the water heater according to the water temperature stabilization time T1 and the water temperature fluctuation value Δ T1 of the first test point specifically includes:
s51: judging whether the water temperature stabilizing time T1 is greater than a reference value or not, and judging whether the water temperature fluctuation value delta T1 is greater than a temperature threshold value or not;
s52: if the water temperature stabilization time T1 is less than or equal to the reference value and the water temperature fluctuation value delta T1 is less than or equal to the temperature threshold value, determining that the zero cold water performance of the water heater is qualified;
specifically, the reference value is 30s, and if the water temperature stabilization time t1 is less than 30s and greater than 20s, it indicates that the water temperature stabilization time is good; if the water temperature stabilization time t1 is less than 20s, it indicates that the water temperature stabilization time is excellent. The temperature threshold is 4 ℃, when the water flow of the first test point is the average water flow value Q1, if the water temperature fluctuation value delta T1 is not more than 4 ℃, the water temperature fluctuation value index is qualified. When the water temperature stabilization time and the water temperature fluctuation value reach the standard, the zero cold water performance of the water heater can be determined to be qualified, and the first test point can meet the requirement of comfortable water consumption of a user. In addition, the display device 6 outputs a report according to the test result of the first test point, so that the test result can be known and referred according to the report content.
S53: and if the water temperature stabilization time T1 is larger than the reference value and/or the water temperature fluctuation value delta T1 is larger than the temperature threshold value, determining that the zero cold water performance of the water heater is unqualified.
Specifically, if the water temperature stabilization time t1 > 30s, it indicates that the water temperature stabilization time performance is normal. When the water flow of the first test point is the average water flow value Q1, if the water temperature fluctuation value delta T1 is more than 4 ℃, the water temperature fluctuation value index is unqualified, the longer the pipeline is, the more heat dissipation is, the longer the pipeline is, the circulation pipeline positioned behind the first test point can be determined, the water temperature fluctuation value is also lower than 4 ℃, if a user uses water in the circulation pipeline positioned behind the first test point, the circulation heating time needs to be properly prolonged, and the temperature of the water using point can meet the water using requirement of the user.
Example 3
Referring to fig. 6, the present embodiment is different from embodiment 2 in that the control method further includes the steps of:
s6: repeating steps S1 through S3;
specifically, after or at the same time as the test is completed for the water temperature stabilization time T1 and the water temperature fluctuation value Δ T1 at the first test point, the control device 3 controls the water flow switch unit 12 at the first test point to be turned off, and clears the timing of the timing device 2. And then repeating the steps S1 to S3 to test the indexes of the water temperature stabilization time, the water temperature fluctuation value and the like of the next test point.
S7: when the instant heating of the water heater is finished, the water flow switch unit 12 of the second test point is opened, the water temperature stabilization time T2 of the second test point is recorded, and the water temperature fluctuation value delta T2 of the second test point is obtained;
s8: and determining the zero cold water performance of the water heater according to the water temperature stabilization time T2 and the water temperature fluctuation value delta T2 of the second test point.
Therefore, in the embodiment, index tests such as water temperature stable time T2 and water temperature fluctuation value are carried out on the second test point to test the delta T2, so that important indexes such as water temperature fluctuation values and water temperature stable time of water outlets of pipelines with different lengths can be tested automatically, and the accuracy is higher due to repeated tests at multiple points.
Further, when the indexes of the temperature fluctuation value, the temperature stabilization time and the like of the third test point are detected, the steps from S1 to S3 are repeated, then when the instant heating of the water heater is completed, the water flow switch unit 12 of the third test point is turned on, and the temperature fluctuation value delta T3 and the temperature stabilization time T3 of the third test point are detected fully automatically. When the temperature fluctuation value DeltaT 3 is higher than 4 ℃, the shorter the pipeline is, the less heat dissipation is, the circulating pipeline positioned before the third test point can be determined, the water temperature fluctuation value is also lower than 4 ℃, if a user uses water in the circulating pipeline positioned before the third test point, the circulating heating time needs to be properly reduced, so that the user is prevented from being scalded due to overhigh water temperature.
In the embodiment, if the test results of the three test points are all qualified or reach the standard, the zero-cold-water performance of the water heater is qualified, and the comfortable water requirements of water outlets of pipelines with different lengths of a user can be ensured; if at least one or two of the test results of the three test points fail or do not meet the standard, the zero cold water performance of the water heater is indicated to be not qualified, and the related control algorithm or the internal structure of the water heater needs to be adjusted.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A detection system for detecting zero cold water performance of a water heater is characterized by comprising:
the water heater circulating pipeline detection device comprises at least one detection device (1), wherein the detection device (1) is installed on the water heater circulating pipeline and forms a test point, the detection device (1) comprises a temperature detection unit (11) and a water flow switch unit (12), the temperature detection unit (11) is used for detecting the water temperature value of the test point, and the water flow switch unit (12) is used for controlling the on-off of water flow of the test point;
the timing device (2) is used for recording the water temperature stabilizing time of the test point;
the control device (3) is electrically connected with the temperature detection unit (11), the water flow switch unit (12) and the timing device (2) respectively, and the control device (3) is used for acquiring a water temperature fluctuation value according to a detected water temperature value and determining the zero cold water performance of the water heater according to the water temperature fluctuation value and the water temperature stabilization time.
2. A test system for testing zero cold water performance of a water heater according to claim 1, characterized in that the test device (1) further comprises a water flow test unit (13) for testing water flow value of a test point, and the water flow test unit (13) is electrically connected with the control device (3).
3. The detection system for detecting the zero cold water performance of the water heater according to the claim 1, characterized by further comprising an exhaust device (4) and/or a water diversion device (5), wherein the exhaust device (4) is installed on the circulation pipeline of the water heater and electrically connected with the control device (3), and the water diversion device (5) is installed at the water inlet of the water heater and electrically connected with the control device (3).
4. A detection system for detecting the zero cold water performance of a water heater according to claim 1, further comprising a display device (6), wherein the display device (6) is electrically connected with the control device (3).
5. A detection system for detecting zero cold water performance of a water heater according to any one of claims 1-4, characterized in that the number of the detection devices (1) is four, and four detection devices (1) are arranged on different positions of a circulation pipeline of the water heater and form four test points.
6. A control method of a detection system, characterized in that the detection system for detecting the zero cold water performance of a water heater as claimed in any one of claims 1-5 is applied, the control method comprises the following steps:
s1: discharging redundant air in a circulating pipeline of the water heater;
s2: controlling the water heater to start an instant heating mode;
s3: judging whether the instant heating of the water heater is finished, if so, entering the next step, otherwise, continuing to execute the step;
s4: opening a water flow switch unit (12) of a first test point, starting to record the water temperature stabilization time T1 of the first test point, and acquiring the water temperature fluctuation value delta T1 of the first test point;
s5: and determining the zero cold water performance of the water heater according to the water temperature stabilization time T1 and the water temperature fluctuation value delta T1 of the first test point.
7. The method for controlling the detection system according to claim 6, wherein the obtaining of the water temperature fluctuation value Δ T1 of the first test point specifically comprises:
s41: after the water flow switch unit (12) is turned on for a period of time, collecting the water temperature value once every preset time interval, and collecting N times to obtain a temperature data set;
s42: extracting a maximum value and a minimum value from the temperature data set;
s43: and calculating the water temperature fluctuation value delta T1 of the first test point according to the maximum value and the minimum value.
8. The control method of a detecting system according to claim 6, characterized in that, at the same time of obtaining the water temperature fluctuation value Δ T1 of the first test point, the water flow detecting unit (13) is used to obtain the water flow data set of the test point, and then the average water flow value Q1 is calculated according to the obtained water flow data set.
9. The method as claimed in claim 6, wherein in step S5, the determining zero cold water performance of the water heater according to the water temperature stabilization time T1 and the water temperature fluctuation value Δ T1 of the first test point specifically comprises:
s51: judging whether the water temperature stabilizing time T1 is greater than a reference value or not, and judging whether the water temperature fluctuation value delta T1 is greater than a temperature threshold value or not;
s52: if the water temperature stabilization time T1 is less than or equal to the reference value and the water temperature fluctuation value delta T1 is less than or equal to the temperature threshold value, determining that the zero cold water performance of the water heater is qualified;
s53: and if the water temperature stabilization time T1 is larger than the reference value and/or the water temperature fluctuation value delta T1 is larger than the temperature threshold value, determining that the zero cold water performance of the water heater is unqualified.
10. A control method of a detection system according to any of claims 6-9, characterized in that the control method further comprises the steps of:
s6: repeating steps S1 through S3;
s7: when the instant heating of the water heater is finished, a water flow switch unit (12) of a second test point is opened, the water temperature stabilization time T2 of the second test point is recorded, and the water temperature fluctuation value delta T2 of the second test point is obtained;
s8: and determining the zero cold water performance of the water heater according to the water temperature stabilization time T2 and the water temperature fluctuation value delta T2 of the second test point.
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| CN113175756A (en) * | 2021-05-25 | 2021-07-27 | 华帝股份有限公司 | Water temperature detection method and equipment |
| CN115218487A (en) * | 2022-07-14 | 2022-10-21 | 宁波方太厨具有限公司 | Control method and system for circulation function of water heater, water heater and storage medium |
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