Heat exchange structure, water heater and monitoring method

Abstract

The application provides a heat exchange structure, a water heater and a monitoring method, and the heat exchange structure comprises: a heat exchange pipeline, a flow sensor is arranged on the heat exchange pipeline; a heating pipeline, an evaporator for absorbing heat is arranged on the heating pipeline; a heat exchanger, the heat exchanger is connected with the heat exchange pipeline, and the heat exchanger is connected with the heating pipeline, so that the heat exchanger exchanges heat between the heat exchange pipeline and the heating pipeline; and a temperature sensing element, the temperature sensing element is connected with the heat exchange pipeline and the heating pipeline, so as to monitor temperature changes of fluid in the heat exchange pipeline and the heating pipeline. The heat exchange structure solves the technical problem that the pipeline in the water heater is not cleaned in time in the prior art.

Description

Technical Field

[0001] This invention relates to the field of water heater technology, specifically to a heat exchange structure, a water heater, and a monitoring method. Background Technology

[0002] Currently, when using underfloor heating heat pump water heaters, if the hot water pipes are not cleaned for extended periods, a large amount of sludge will accumulate on the inner walls, affecting the unit's heating performance. This results in poor heating efficiency, a bad user experience, and energy waste.

[0003] However, existing technologies typically address these issues by increasing the frequency of cleaning or replacing the hot water pipes. However, increasing the frequency of cleaning can damage the pipes, and replacing too many hot water pipes leads to excessively high maintenance costs. Therefore, existing water heater technologies suffer from high maintenance costs and untimely repairs.

[0004] Therefore, existing technologies need further development. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a heat exchange structure, a water heater and a monitoring method to solve the technical problem of untimely cleaning of pipes in water heaters in related technologies.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: a heat exchange structure is provided, comprising: a heat exchange pipeline, wherein a flow sensor is provided on the heat exchange pipeline; a heating pipeline, wherein an evaporator for absorbing heat is provided on the heating pipeline; a heat exchanger, wherein the heat exchanger is connected to the heat exchange pipeline and the heating pipeline, so as to exchange heat between the heat exchange pipeline and the heating pipeline through the heat exchanger; and a temperature sensing element, wherein the temperature sensing element is connected to the heat exchange pipeline and / or the heating pipeline, so as to monitor the temperature change of the fluid in the heat exchange pipeline and / or the heating pipeline.

[0007] Furthermore, the heat exchange structure also includes a first temperature sensor and a second temperature sensor disposed on the heating pipeline. The first temperature sensor is disposed upstream of the heat exchanger, and the second temperature sensor is disposed downstream of the heat exchanger.

[0008] Furthermore, the heat exchange structure also includes a third temperature sensor and a fourth temperature sensor installed on the heat exchange pipeline. The third temperature sensor is installed upstream of the heat exchanger, and the fourth temperature sensor is installed downstream of the heat exchanger.

[0009] Furthermore, the heat exchange structure includes: a compressor disposed on the heating pipeline; and / or a throttling element disposed on the heating pipeline to control the flow rate of the fluid in the heating pipeline; and / or a water pump disposed on the heat exchange pipeline.

[0010] A water heater includes a heat exchange structure, which is the heat exchange structure described above.

[0011] A monitoring method applicable to the aforementioned heat exchange structure, characterized in that the monitoring method includes: measuring the flow rate A of the fluid in the heat exchange pipeline using a flow sensor of the heat exchange structure; measuring the temperature change Z of the fluid in the heat exchange pipeline and / or heating pipeline using a temperature sensing element; and determining whether the heat exchange structure needs to be cleaned based on the flow rate A and the temperature change Z.

[0012] Furthermore, the method for determining whether the heat exchange structure needs to be cleaned based on the flow rate A includes: comparing the value of the flow rate A with a threshold B; if A≤B, then determining whether the heat exchange structure needs to be cleaned based on the temperature change value Z; if A>B, then the heat exchange structure does not need to be cleaned.

[0013] Furthermore, the method for obtaining the threshold B includes: measuring the preset flow rate value X of the fluid in the heat exchange pipeline under a predetermined operating condition; B = aX; where 0 < a < 1, and the method for setting the preset flow rate value X is: adjusting the water pump of the heat exchange structure to a predetermined operating condition, running stably for a predetermined time, and continuously sampling n times, the average value of the flow rate values ​​of the n samples is the preset flow rate value X.

[0014] Furthermore, the method for setting the preset flow rate value X includes: sampling the fluid in the heat exchange pipeline n times when the heat exchange structure is used for the first time, or when the heat exchange structure is used for the first time after cleaning; and / or, a = 80%.

[0015] Furthermore, the method for determining whether the heat exchange structure needs to be cleaned based on the temperature change value Z includes: calculating the heat exchange efficiency value V based on the temperature change value Z and the flow rate A; comparing the heat exchange efficiency value V with the threshold Y; if V < Y, then the heat exchange structure needs to be cleaned.

[0016] Beneficial effects:

[0017] It can be used to monitor the heat exchange efficiency of the water system in a floor heating heat pump water heater. After comparing the measured flow rate A, the heat exchange efficiency is calculated and compared with the system value by reading the temperature change value Z and the flow rate A. This can promptly remind users to clean the floor heating heat pump water heater, improve heating efficiency, and ensure the efficient operation of the floor heating heat pump water heater. Attached Figure Description

[0018] Figure 1 This is a simplified structural diagram of the heat exchange structure used in the embodiments of the present invention;

[0019] Figure 2 This is a flowchart of the detection method used in an embodiment of the present invention.

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

[0021] 1. Heat exchange piping; 11. Flow sensor; 2. Heating piping; 21. First temperature sensor; 22. Second temperature sensor; 23. Third temperature sensor; 24. Fourth temperature sensor; 3. Evaporator; 4. Heat exchanger; 5. Temperature sensing element; 6. Compressor; 7. Throttling element; 8. Water pump. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0023] According to an embodiment of the present invention, a heat exchange structure is provided; please refer to [link / reference]. Figures 1 to 2 It includes: a heat exchange pipeline 1, on which a flow sensor 11 is installed; a heating pipeline 2, on which an evaporator 3 for absorbing heat is installed; a heat exchanger 4, which is connected to the heat exchange pipeline 1 and the heating pipeline 2, so as to exchange heat between the heat exchange pipeline 1 and the heating pipeline 2; and a temperature sensing element 5, which is connected to the heat exchange pipeline 1 and / or the heating pipeline 2, so as to monitor the temperature change of the fluid in the heat exchange pipeline 1 and / or the heating pipeline 2.

[0024] By installing a flow sensor 11 in the heat exchange pipe 1, the change in water flow in the heat exchange pipe 1 can be monitored in a timely manner. When sludge adheres to the wall of the heat exchange pipe 1, the flow in the heat exchange pipe 1 will gradually decrease. When the flow is lower than the system set value, it can be preliminarily judged that there is a blockage in the heat exchange pipe 1. By installing a temperature sensing element 5, the temperature change of the fluid in the heat exchange pipe 1 and the heating pipe 2 can be monitored. The heat exchange efficiency in the heat exchange structure can be calculated by the temperature change and flow change, so as to judge the blockage in the heat exchange pipe 1 in a timely manner and promptly feed back the monitoring results to the user. The user can clean the heat exchange pipe 1 in a timely manner. The above settings improve the heating efficiency and solve the technical problem of untimely cleaning of pipes in water heaters in related technologies.

[0025] In the heat exchange structure of this embodiment, see Figure 1 The heat exchange structure also includes a first temperature sensor 21 and a second temperature sensor 22 installed on the heating pipe 2. The first temperature sensor 21 is located upstream of the heat exchanger 4, and the second temperature sensor 22 is located downstream of the heat exchanger 4. In this way, by setting the first temperature sensor 21 and the second temperature sensor 22, the temperature changes of the inlet and outlet pipes of the fluorine system in the heating pipe 2 can be read.

[0026] In the heat exchange structure of this embodiment, see Figure 1 The heat exchange structure also includes a third temperature sensor 23 and a fourth temperature sensor 24 installed on the heat exchange pipeline 1. The third temperature sensor 23 is located upstream of the heat exchanger 4, and the fourth temperature sensor 24 is located downstream of the heat exchanger 4. In this way, by setting the first temperature sensor 21 and the second temperature sensor 22, the temperature changes of the inlet and outlet pipes of the water system in the heat exchange pipeline 1 can be read.

[0027] In the heat exchange structure of this embodiment, see Figure 1 The heat exchange structure includes: a compressor 6, installed on the heating pipe 2; and / or a throttling element 7, installed on the heating pipe 2 to control the flow rate of the fluid in the heating pipe 2; and / or a water pump 8, installed on the heat exchange pipe 1. Thus, by installing the compressor 6 and the throttling element 7, the refrigeration cycle of the heating pipe 2 can be completed, and by installing the water pump 8 on the heat exchange pipe 1, the heat exchange efficiency of the heat exchange pipe 1 can be accelerated.

[0028] The water heater in this embodiment includes a heat exchange structure, which is the heat exchange structure described above.

[0029] The monitoring method of this embodiment is applicable to the heat exchange structure described above. The monitoring method includes: measuring the flow rate A of the fluid in the heat exchange pipeline 1 through the flow sensor 11 of the heat exchange structure; measuring the temperature change Z of the fluid in the heat exchange pipeline 1 and / or the heating pipeline 2 through the temperature sensing element 5; and determining whether the heat exchange structure needs to be cleaned based on the flow rate A and the temperature change Z.

[0030] In the monitoring method of this embodiment, see Figure 2 The method for determining whether the heat exchange structure needs to be cleaned based on the flow rate A includes: comparing the value of the flow rate A with the threshold B; if A≤B, then determining whether the heat exchange structure needs to be cleaned based on the temperature change value Z; if A>B, then the heat exchange structure does not need to be cleaned.

[0031] Specifically, the flow rate change in the heat exchange pipeline 1 is monitored by the flow sensor 11. When the heat exchange pipeline 1 is not clogged, i.e., A > B, there is no need to clean the heat exchange structure. When A ≤ B, it is determined that the water system may be clogged and the clogged heat exchange pipeline 1 may be more serious. Then, the next step is executed, and the temperature change value Z is used to determine whether the heat exchange structure needs to be cleaned.

[0032] Specifically, when A > B, the running time of the heat exchange structure is recorded. When it runs continuously for a certain period of time, the detection method in this embodiment is repeated. The running time is generally 1500-2000 hours.

[0033] In the monitoring method of this embodiment, see Figure 2The method for obtaining the threshold B includes: measuring the preset flow rate value X of the fluid in the heat exchange pipeline 1 under a predetermined operating condition; B = aX; where 0 < a < 1. The method for setting the preset flow rate value X is: adjusting the water pump 8 of the heat exchange structure to a predetermined operating condition, running stably for a predetermined time, and continuously sampling n times. The average value of the flow rate values ​​of the n samples is the preset flow rate value X.

[0034] In the monitoring method of this embodiment, see Figure 2 The method for setting the preset flow rate value X includes: sampling the fluid in the heat exchange pipeline 1 n times when the heat exchange structure is used for the first time, or when the heat exchange structure is used for the first time after cleaning; and / or, a = 80%.

[0035] In some embodiments, the preset flow rate value X is obtained by adjusting the water pump 8 of the heat exchange structure to a predetermined operating condition, running stably for 5 minutes, and then continuously sampling the fluid in the heat exchange pipeline 1 5 times. The average value of the flow rate values ​​of the 5 samples is the preset flow rate value X. When the user changes the installation of the heat exchange structure, the preset flow rate value X needs to be reset.

[0036] In the monitoring method of this embodiment, see Figure 2 The method for determining whether the heat exchange structure needs to be cleaned based on the temperature change value Z includes: calculating the heat exchange efficiency value V based on the temperature change value Z and the flow rate A; comparing the heat exchange efficiency value V with the threshold Y; if V < Y, then the heat exchange structure needs to be cleaned.

[0037] Specifically, when A≤B is detected, it can be determined that the heat exchange efficiency of heat exchange pipeline 1 may be low. Then, the compressor 6 in heating pipeline 2 is adjusted to the preset frequency. The preset frequency is generally set to the compressor frequency under normal operating conditions.

[0038] Specifically, by reading the temperature values ​​of the first temperature sensor 21, the second temperature sensor 22, the third temperature sensor 23, and the fourth temperature sensor 24, the temperature change value Z between the heat exchange pipeline 1 and the heating pipeline 2 can be obtained. Based on the temperature change value Z and the flow rate A, the heat exchange efficiency value V can be calculated.

[0039] Specifically, the threshold Y is calculated as Y = bY1, where Y1 is a fixed value obtained from multiple laboratory tests of the heat exchange structure, and b = 30%.

[0040] When V < Y, it can be determined that the heat exchange efficiency in heat exchange pipeline 1 is low, and the user can be prompted to clean the heat exchanger in time.

[0041] The working process of the detection method in this embodiment is as follows:

[0042] When the water heater is turned on, the flow rate A of the fluid in the heat exchange pipe 1 is measured by the flow sensor 11. The value of the flow rate A is compared with the threshold B. When A≤B, the compressor 6 in the heating pipe 2 is adjusted to the preset frequency, and the temperature change value Z is calculated. Based on the temperature change value Z and the flow rate A, the heat exchange efficiency value V is calculated. The heat exchange efficiency value V is compared with the threshold Y. When V<Y, it is determined that the heat exchange efficiency of the heat exchange pipe 1 is low, and the user is prompted to clean the heat exchange structure in time. When A>B, the running time of the heat exchange structure is recorded. When it runs continuously for a certain period of time, the detection method in this embodiment is repeated.

[0043] Applying the heat exchange structure and monitoring method of this invention to a floor heating heat pump water heater can monitor the heat exchange efficiency of the water system in the floor heating heat pump water heater. After comparing the measured flow rate A, the heat exchange efficiency is calculated and compared with the system value by reading the temperature change value Z and the flow rate A. This can promptly remind users to clean the floor heating heat pump water heater, improve heating efficiency, and ensure the efficient operation of the floor heating heat pump water heater.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0046] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0047] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A monitoring method applicable to a heat exchange structure, said heat exchange structure comprising: A heat exchange pipeline (1) is provided with a flow sensor (11); a heating pipeline (2) is provided with an evaporator (3) for absorbing heat; a heat exchanger (4) is connected to the heat exchange pipeline (1) and the heating pipeline (2) to exchange heat between the heat exchange pipeline (1) and the heating pipeline (2); a temperature sensing element (5) is connected to the heat exchange pipeline (1) and / or the heating pipeline (2) to monitor the temperature change of the fluid in the heat exchange pipeline (1) and / or the heating pipeline (2); a compressor (6) is provided on the heating pipeline (2); and a throttling element (7) is provided on the heating pipeline (2) to control the flow rate of the fluid in the heating pipeline (2). A water pump (8) is installed on the heat exchange pipeline (1), characterized in that the monitoring method includes: The flow rate A of the fluid in the heat exchange pipeline (1) is measured by the flow sensor (11) of the heat exchange structure; The temperature change Z of the fluid in the heat exchange pipeline (1) and / or heating pipeline (2) is measured by the temperature sensing element (5); Based on the flow rate A and the temperature change value Z, determine whether the heat exchange structure needs to be cleaned; The methods for determining whether the heat exchange structure needs to be cleaned based on flow rate A include: Compare the value of flow A with the threshold B; If A≤B, then determine whether the heat exchange structure needs to be cleaned based on the temperature change value Z; If A > B, then the heat exchange structure is not cleaned. The method for obtaining the threshold B includes: under a predetermined working condition, measuring the preset flow rate value X of the fluid in the heat exchange pipeline (1); B = aX; where 0 < a < 1, and the method for setting the preset flow rate value X is: adjusting the water pump (8) of the heat exchange structure to a predetermined working condition, running stably for a predetermined time, and continuously sampling n times, the average value of the flow rate values ​​of the n samples is the preset flow rate value X; The methods for determining whether the heat exchange structure needs to be cleaned based on the temperature change value Z include: The heat exchange efficiency V is calculated based on the temperature change value Z and the flow rate A. The heat exchange efficiency value V is compared with the threshold Y. If V < Y, the heat exchange structure needs to be cleaned. The threshold Y is calculated as Y = bY1, where Y1 is a fixed value obtained from multiple laboratory tests of the heat exchange structure, and b = 30%.

2. The monitoring method according to claim 1, characterized in that, The method for setting the preset flow rate value X includes: sampling the fluid in the heat exchange pipeline (1) n times when the heat exchange structure is used for the first time, or when the heat exchange structure is used for the first time after cleaning; and / or, a = 80%.

3. The monitoring method according to claim 1, characterized in that, The heat exchange structure also includes a first temperature sensor (21) and a second temperature sensor (22) disposed on the heating pipe (2). The first temperature sensor (21) is disposed upstream of the heat exchanger (4), and the second temperature sensor (22) is disposed downstream of the heat exchanger (4).

4. The monitoring method according to claim 1, characterized in that, The heat exchange structure also includes a third temperature sensor (23) and a fourth temperature sensor (24) disposed on the heat exchange pipeline (1). The third temperature sensor (23) is disposed upstream of the heat exchanger (4), and the fourth temperature sensor (24) is disposed downstream of the heat exchanger (4).

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