Heat exchange assembly and gas water heater

Abstract

The utility model belongs to the technical field of heat exchange, and particularly discloses a heat exchange assembly and a gas water heater. The heat exchange assembly comprises a heat exchanger, a main water outlet pipe and a first bypass water outlet pipe, the water inlet end of the main water outlet pipe is connected with the water outlet end of the heat exchanger, and the two ends of the first bypass water outlet pipe are connected with the main water outlet pipe. The main water outlet pipe is provided with a first parallel pipe part connected with the first bypass water outlet pipe in parallel and a header pipe part located between the water inlet end of the first parallel pipe part and the heat exchanger. The water volume / water flow ratio of the first parallel pipe part is different from the water volume / water flow ratio of the first bypass water outlet pipe. The gas water heater comprises the heat exchange assembly. According to the heat exchange assembly and the gas water heater, the temperature fluctuation of the water outlet end of the heat exchange assembly can be reduced, and the water using comfort of the gas water heater is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a heat exchange component and a gas water heater. Background Art

[0002] A gas water heater is a device that heats the water in a heat exchanger through high-temperature flue gas generated by combustion so that the water flowing out of the heat exchanger meets the target water outlet temperature. It is widely used in household life due to its small size and high heating efficiency.

[0003] When a conventional gas water heater is shut down and restarted during use, the thermal inertia of the heat exchanger will cause a high temperature rise, resulting in a sudden increase in water temperature. At the same time, since it takes a certain amount of time to re-ignite and heat, a period of cold water will appear afterwards, causing water temperature fluctuations after the water is shut off and restarted, resulting in poor water comfort for users.

[0004] To solve this technical problem, the prior art provides a gas water heater, in which a bypass pipe is added between the water inlet pipe and the water outlet pipe of the heat exchanger, and a control valve is arranged on the bypass pipe, so that the temperature rise generated when the water is stopped and restarted is reduced by mixing the cold water in the bypass pipe with the hot water in the water outlet pipe of the heat exchanger.

[0005] However, although the setting of the bypass pipe can reduce the temperature rise when the water is shut down and then restarted, there is still the problem of a section of cold water affecting the water use comfort; moreover, after the bypass pipe is opened, the water flow entering the heat exchanger is reduced, resulting in a greater temperature rise of the water flowing out of the outlet pipe of the heat exchanger. The water temperature upstream of the connection between the outlet pipe and the bypass pipe is higher, which easily generates scale in this pipe section, reducing thermal efficiency, thereby affecting the service life and efficiency of the heat exchanger. Utility Model Content

[0006] One of the technical problems solved by the utility model is to provide a heat exchange component, which can effectively solve the water temperature fluctuation problem of the existing gas water heater after the water is stopped and then the water temperature rises and then the cold water is discharged, while ensuring the heat exchange performance of the heat exchange component, and improving the consistency of the water outlet temperature of the heat exchange component.

[0007] The second technical problem solved by the utility model is to provide a gas water heater, which can effectively solve the problem of water outlet temperature fluctuation after water is stopped and restarted in the existing gas water heater, thereby improving the water use experience of the gas water heater.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A heat exchange assembly includes a heat exchanger, a main water outlet pipe and a first bypass water outlet pipe, wherein the water inlet end of the main water outlet pipe is connected to the water outlet end of the heat exchanger, both ends of the first bypass water outlet pipe are connected to the main water outlet pipe, and the main water outlet pipe has a first parallel pipe portion connected in parallel with the first bypass water outlet pipe and a main pipe portion located between the water inlet end of the first parallel pipe portion and the heat exchanger; the ratio of water volume / water flow of the first parallel pipe portion is different from the ratio of water volume / water flow of the first bypass water outlet pipe.

[0010] Compared with the background technology, the heat exchange component described in the utility model has the following beneficial effects: the heat exchange component provided in this embodiment, by arranging a first bypass water outlet pipe in parallel with the main water outlet pipe, and the ratio of the water volume / water flow of the first parallel pipe portion is different from the ratio of the water volume / water flow of the first bypass water outlet pipe, so that the hot water is diverted at the upstream intersection A of the first bypass water outlet pipe and the first parallel pipe portion, and the time for the diverted water flow to flow through the first bypass water outlet pipe and the first parallel pipe portion to the downstream intersection B of the two is different. Since the two water flows arrive at the intersection B at different times, the high-temperature water that enters the water inlet end of the main water inlet pipe at the same time will not meet at the intersection B at the same time after diversion. The high-temperature water that flows out of the intersection B first will meet and mix with the water that flows into the other water flow first, thereby lowering the temperature of the high-temperature water and achieving the effect of reducing the temperature rise of the high-temperature water outlet; at the same time, the low-temperature water that flows out of the intersection B first will mix with the water that enters the other diversion pipe first at the intersection B, thereby increasing the water temperature of the low-temperature water.

[0011] That is, the heat exchange component provided in this embodiment can achieve the effect of reducing the outlet water temperature fluctuation at the interaction point B by mixing two streams of water with different water temperatures that flow out successively at the intersection point B, thereby reducing the water temperature fluctuation flowing out of the main outlet pipe and improving water use comfort; furthermore, since the water flow is diverted downstream of the main pipe section, when the water inlet flow rate at the water inlet end of the cold water pipe remains unchanged, the flow rate entering the heat exchanger will not change, so that the heat exchanger will not cause a decrease in flow due to diversion, which will further increase the outlet water temperature rise and easily cause scale generation due to too small a flow rate, thereby improving the heat exchange efficiency of the heat exchanger and improving the outlet water temperature consistency of the heat exchange component.

[0012] In one embodiment, the ratio of the water flow rate of the first bypass water outlet pipe to the water flow rate of the main pipe portion is 0.2-0.8.

[0013] In one embodiment, the heat exchanger includes a plurality of heat exchange straight pipe sections that are bent and connected in sequence, and the heat exchange straight pipe section connected to the main water outlet pipe is a water outlet straight pipe section;

[0014] The water volume of the first bypass water outlet pipe is larger than the water volume of the first parallel pipe section, and the ratio of the water volume of the first bypass water outlet pipe to the water volume of the water outlet straight pipe section is 0.3 to 5; or, the water volume of the first parallel pipe section is larger than the water volume of the first bypass water outlet pipe, and the ratio of the water volume of the first parallel pipe section to the water volume of the water outlet straight pipe section is 0.3 to 5.

[0015] In one embodiment, the ratio of the water flow rate of the first bypass water outlet pipe to the water flow rate of the first parallel pipe portion is 0.9 to 1.1;

[0016] The one with a larger water volume between the first bypass water outlet pipe and the first parallel pipe section is the first water outlet pipe, and the other is the second water outlet pipe. The ratio of the water volume of the first water outlet pipe to the water volume of the water outlet straight pipe section is greater than 0.5.

[0017] In one embodiment, the one with a larger water flow rate between the first bypass water outlet pipe and the first parallel pipe portion is the first water outlet pipe, and the other is the second water outlet pipe, the ratio of the water flow rate of the first water outlet pipe to the water flow rate of the second water outlet pipe is greater than or equal to 3, and the ratio of the water volume of the second water outlet pipe to the water volume of the first water outlet pipe is greater than 3;

[0018] Or, the one with a larger water flow rate between the first bypass water outlet pipe and the first parallel pipe section is the first water outlet pipe, and the other is the second water outlet pipe, the ratio of the water flow rate of the first water outlet pipe to the water flow rate of the second water outlet pipe is greater than or equal to 3, and the water volume of the first water outlet pipe and the water volume of the second water outlet pipe are greater than or equal to 1.

[0019] In one embodiment, the ratio of the water volume to the water flow of the first bypass water outlet pipe is A, the ratio of the water flow to the water volume of the first parallel pipe portion is B, A≥4B, or B≥4A.

[0020] In one embodiment, the heat exchange component also includes a second bypass water outlet pipe, which is arranged in parallel with the first bypass water outlet pipe and the first parallel pipe portion. The ratio of water volume to water flow of the second bypass water outlet pipe is different from the ratio of water volume to water flow of the first bypass water outlet pipe, and the ratio of water volume to water flow of the bypass water outlet pipe is different from the ratio of water volume and water flow of the first parallel pipe portion.

[0021] In one embodiment, both ends of the second bypass water outlet pipe are connected to the first parallel pipe portion;

[0022] Alternatively, both ends of the second bypass water outlet pipe are connected to the first bypass water outlet pipe.

[0023] In one embodiment, the heat exchange assembly further includes a second bypass water outlet pipe, both ends of the second bypass water outlet pipe are connected to the main water outlet pipe, and the main water outlet pipe has a second parallel pipe portion connected in parallel with the second bypass water outlet pipe;

[0024] The water volume / water flow ratio of the second parallel pipe section is different from the water volume / water flow ratio of the second bypass water outlet pipe, and the water volume / water flow ratio of the second parallel pipe section is different from the water volume / water flow ratio of the first parallel pipe section.

[0025] The above second technical problem is solved by the following technical solution:

[0026] A gas water heater comprises the heat exchange assembly as described above.

[0027] Compared with the background technology of the gas water heater described in the utility model, the beneficial effects are: by adopting the above-mentioned heat exchange component, the water outlet temperature fluctuation of the gas water heater during use can be reduced, the water use comfort of the gas water heater can be improved, the user experience of the gas water heater can be improved, and the probability of scaling inside the gas water heater can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a gas water heater provided in Embodiment 1 of the utility model;

[0029] Figure 2 A schematic diagram of temperature distribution of the heat exchanger provided in the second embodiment of the utility model during normal use and after restarting after water outage;

[0030] Figure 3 A schematic diagram of temperature distribution at multiple moments after water is shut off and restarted provided in the second embodiment of the utility model;

[0031] Figure 4 A schematic diagram of temperature distribution at multiple moments after water is shut off and restarted provided in the third embodiment of the utility model;

[0032] Figure 5 A schematic diagram of temperature distribution at multiple moments after water is shut off and restarted provided in the fourth embodiment of the utility model;

[0033] Figure 6 A schematic diagram of temperature distribution at multiple moments after water is shut off and restarted provided in Embodiment 5 of the present utility model;

[0034] Figure 7 A schematic diagram of the structure of a gas water heater provided in Embodiment 6 of the present utility model;

[0035] Figure 8 A schematic diagram of the structure of a gas water heater provided in Embodiment 7 of the present utility model;

[0036] Fig. 9 This is a schematic diagram of the structure of the gas water heater provided in Embodiment 8 of the present utility model.

[0037] Description of labels:

[0038] 1. Heat exchanger; 11. Heat exchange straight pipe section; 11a. Water outlet straight pipe section; 2. Main water outlet pipe; 21. Main pipe section; 22. First parallel pipe section; 23. Second parallel pipe section; 3. First bypass water outlet pipe; 4. Second bypass water outlet pipe; 5. Cold water pipe. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of this application, 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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 this application can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] The present embodiment provides a heat exchange component, which can be used in a gas water heater to heat the water flowing through the heat exchange component by exchanging heat with high-temperature flue gas, so that the water outlet end of the heat exchange component can provide hot water that meets the target water outlet temperature.

[0045] like Figure 1 As shown, the heat exchange assembly includes a heat exchanger 1 and a water outlet pipe group, wherein the water inlet end of the heat exchanger 1 is used to connect with the cold water pipe 5 of the gas water heater, and the water outlet pipe of the heat exchanger 1 is connected to the water inlet end of the water outlet pipe group. The heat exchanger 1 is used to perform heat exchange with the high-temperature flue gas, so that heated hot water flows out of its water outlet; the water outlet pipe group is connected between the heat exchanger 1 and the water use end to supply the water outlet of the heat exchanger 1 to the water use end.

[0046] In this embodiment, the water outlet pipe group includes a main water outlet pipe 2 and a first bypass water outlet pipe 3, the water inlet end of the main water outlet pipe 2 is connected to the water outlet end of the heat exchanger 1, both ends of the first bypass water outlet pipe 3 are connected to the main water outlet pipe 2, and the main water outlet pipe 2 has a first parallel pipe portion 22 connected in parallel with the first bypass water outlet pipe 3 and a main pipe portion 21 located between the first parallel pipe portion 22 and the heat exchanger 1; the ratio of water volume / water flow of the first parallel pipe portion 22 is different from the ratio of water volume / water flow of the first bypass water outlet pipe 3.

[0047] The heat exchange assembly provided in this embodiment is provided with a first bypass outlet pipe 3 connected in parallel with the main outlet pipe 2, and the ratio of the water volume / water flow of the first parallel pipe portion 22 is different from the ratio of the water volume / water flow of the first bypass outlet pipe 3, so that the hot water is split at the upstream intersection A of the first bypass outlet pipe 3 and the first parallel pipe portion 22, and the time for the split water flow to flow to the downstream intersection B of the two through the first bypass outlet pipe 3 and the first parallel pipe portion 22 is different. Since the time when the two water flows arrive at the intersection B is staggered, the high-temperature water that enters the water inlet end of the main inlet pipe at the same time will not meet at the intersection B at the same time after being split, and the high-temperature water that flows out of the intersection B first will meet and mix with the water that flows into the other water flow first, thereby reducing the temperature of the high-temperature water, and achieving the effect of reducing the temperature rise of the high-temperature water outlet; at the same time, the low-temperature water that flows out of the intersection B first will mix with the water that enters the other split pipe at the intersection B, thereby increasing the water temperature of the low-temperature water.

[0048] That is, the heat exchange component provided in this embodiment can achieve the effect of reducing the outlet water temperature fluctuation at the interaction point B by mixing two streams of water with different water temperatures flowing out successively at the intersection point B, thereby reducing the water temperature fluctuation flowing out of the main outlet pipe 2 and improving water use comfort; furthermore, since the water flow is diverted downstream of the main pipe section 21, when the water inlet flow rate at the water inlet end of the cold water pipe 5 remains unchanged, the flow rate entering the heat exchanger 1 will not change, so that the heat exchanger 1 will not cause a flow reduction due to the diversion, which will further increase the outlet water temperature rise and easily cause scale to form due to too small a flow rate, thereby improving the heat exchange efficiency of the heat exchanger 1 and improving the outlet water temperature consistency of the heat exchange component.

[0049] The heat exchanger 1 includes a plurality of heat exchange straight pipe sections that are bent and connected in sequence. Two adjacent heat exchange straight pipe sections are arranged in parallel and spaced apart and connected by a bend pipe section. The heat exchange straight pipe section at one end is connected to the cold water pipe 5, and the heat exchange straight pipe section at the other end is connected to the main outlet pipe 2. For the convenience of description, the heat exchange straight pipe section connected to the main outlet pipe 2 is called the outlet straight pipe section 111a.

[0050] In one embodiment, the water volume of the first bypass water outlet pipe 3 is greater than the water volume of the first parallel pipe portion 22, and the ratio of the water volume of the first bypass water outlet pipe 3 to the water volume of the water outlet straight pipe section 111a is 0.3 to 5; or, the water volume of the first parallel pipe portion 22 is greater than the water volume of the first bypass water outlet pipe 3, and the ratio of the water volume of the first parallel pipe portion 22 to the water volume of the water outlet straight pipe section 11a is 0.3 to 5.

[0051] That is, the ratio of the water volume of the larger one of the first bypass water outlet pipe 3 and the first parallel pipe portion 22 to the water volume of the water outlet straight pipe section 11 a is 0.3-5.

[0052] For the convenience of subsequent description, the ratio of the water volume to the water flow of the first bypass water outlet pipe 3 is defined as A, and the ratio of the water volume to the water flow of the first parallel pipe portion 22 is defined as B. In one embodiment, A≥4B. In another embodiment, B≥5A.

[0053] In one embodiment, the water flow rates of the first bypass water outlet pipe 3 and the first parallel pipe portion 22 are close to or equal. Specifically, the ratio of the water flow rate of the first bypass water outlet pipe 3 to the water flow rate of the first parallel pipe portion 22 is 0.9 to 1.1. The one with the larger water volume between the first bypass water outlet pipe 3 and the first parallel pipe portion 22 is the first water outlet pipe, and the other is the second water outlet pipe. The ratio of the water volume of the first water outlet pipe to the water volume of the water outlet straight pipe section 11a is greater than 0.5, and preferably greater than 0.6.

[0054] When the water volume of the first bypass water outlet pipe 3 and the first parallel pipe part 22 is close to or equal, the water volume of the one with a larger water flow rate should be much larger than the water volume of the one with a smaller water flow rate, thereby increasing the difference between A and B, thereby ensuring the mixing effect. That is, further, the ratio of the water volume of the first water outlet pipe to the water volume of the second water outlet pipe is greater than 3.

[0055] In another embodiment, the water flow rates of the first parallel pipe portion 22 and the first bypass water outlet pipe 3 differ greatly, and the water volume of the one with a larger water flow rate in the first parallel pipe portion 22 and the first bypass water outlet pipe 3 is smaller, then the water volume of the one with a larger water flow rate is as large as possible, thereby increasing the difference between A and B.

[0056] Specifically, the one with a larger water flow rate between the first bypass water outlet pipe 3 and the first parallel pipe portion 22 is the first water outlet pipe, and the other is the second water outlet pipe. The ratio of the water flow rate of the first water outlet pipe to the water flow rate of the second water outlet pipe is greater than or equal to 2, and the ratio of the water volume of the second water outlet pipe to the water volume of the first water outlet pipe is greater than 3.

[0057] In yet another embodiment, the water flow rates of the first parallel pipe portion 22 and the first bypass water outlet pipe 3 differ greatly, and the water volume of the one with a larger water flow rate in the first parallel pipe portion 22 and the first bypass water outlet pipe 3 is larger, then the water volume of the one with a larger water flow rate is close to the water volume of the one with a smaller water flow rate, or the water volume of the one with a smaller water flow rate is significantly smaller, thereby increasing the difference between A and B.

[0058] Specifically, the one with a larger water flow rate between the first bypass water outlet pipe 3 and the first parallel pipe portion 22 is the first water outlet pipe, and the other is the second water outlet pipe. The ratio of the water flow rate of the first water outlet pipe to the water flow rate of the second water outlet pipe is greater than or equal to 2, and the water volume of the first water outlet pipe is greater than or equal to the water volume of the second water outlet pipe.

[0059] The present embodiment also provides a gas water heater, including the above-mentioned heat exchange component. The gas water heater provided in the present embodiment, by adopting the above-mentioned heat exchange component, can reduce the fluctuation of the water outlet temperature of the gas water heater during use, improve the water use comfort of the gas water heater, improve the user experience of the gas water heater, and reduce the probability of scaling inside the gas water heater.

[0060] Embodiment 2

[0061] This embodiment provides a heat exchange component, and the structure of the heat exchange component provided in this embodiment is basically the same as that of the heat exchange component in Embodiment 1, with only some differences in settings. This embodiment will no longer repeat the structure that is the same as that in Embodiment 1.

[0062] like Figure 2As shown, in this embodiment, the heat exchanger 1 includes five heat exchange straight pipe sections 11, the inlet water temperature of the heat exchanger 1 is 20°C, the target outlet water temperature is 45°C, and the water volume of the outlet straight pipe section 11a is 200ml.

[0063] When the gas water heater is in normal use, the water temperature at the water inlet end of the heat exchanger 1 is 20°C, the water temperature at the water inlet end of the outlet straight pipe section 11a is 40°C, and the water temperature at the outlet end of the outlet straight pipe section 11a is 45°C. When the water is restarted after one minute of water outage, the water temperature at the water inlet end of the outlet straight pipe section 11a is 50°C, and the water temperature at the outlet end of the outlet straight pipe section 11a is 55°C.

[0064] The water flow rates of the first bypass water outlet pipe 3 and the first parallel pipe portion 22 are equal, the water volume of the first bypass water outlet pipe 3 is 250 ml, and the water volume of the first parallel pipe portion 22 is 50 ml.

[0065] like Figure 3 (a) to Figure 3 As shown in (o), the water temperature distribution of the first parallel pipe section 22 and the first bypass water outlet pipe 3 at different times is detected within a period of time after the water supply is stopped and restarted. Figure 3 (a) to Figure 3 The detection time of (o) increases successively, that is, Figure 3 (a) Compared with the detection time Figure 3 (b) Closer to the restart time of water outage, Figure 3 The detection distance of (o) is the farthest from the start time point.

[0066] like Figure 3 As shown in (a), at this detection moment, when the 52.5°C water just flows into the intersection A, the 55°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 45°C water that originally flows out of the intersection B from the first bypass outlet pipe 3 to form 50°C water;

[0067] like Figure 3 As shown in (b), when the 50.5°C water just flows into the intersection A, the 52.5°C water flows from the first parallel pipe portion 22 to the intersection B and mixes with the 45°C water that originally flows out of the intersection B from the first bypass outlet pipe 3 to form 48.75°C water;

[0068] like Figure 3 As shown in (c), when the 47.5°C water just flows into the intersection A, the 50°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 45°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 47.5°C water;

[0069] like Figure 3As shown in (d), when the 45°C water just flows into the intersection A, the 47.5°C water flows from the first parallel pipe portion 22 to the intersection B and mixes with the 45°C water that originally flows out of the intersection B from the first bypass outlet pipe 3 to form 46.25°C water;

[0070] like Figure 3 As shown in (e), when the 42.5°C water just flows into the intersection A, the 45°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 55°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 50°C water;

[0071] like Figure 3 As shown in (f), when the 40°C water just flows into the intersection A, the 42.5°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 52.5°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 47.5°C water;

[0072] like Figure 3 As shown in (g), when the 37.5°C water just flows into the intersection A, the 40°C water flows from the first parallel pipe part 22 to the intersection B and mixes with the 50°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 45°C water;

[0073] like Figure 3 As shown in (h), when the 35°C water just flows into the intersection A, the 37.5°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 47.5°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 42.5°C water;

[0074] like Figure 3 As shown in (i), when the 32.5°C water just flows into the intersection A, the 35°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 45°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 40°C water;

[0075] like Figure 3 As shown in (j), when the 30°C water just flows into the intersection A, the 32.5°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 42.5°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 37.5°C water;

[0076] like Figure 3 As shown in (k), when the 20°C water just flows into the intersection A, the 30°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 40°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 35°C water;

[0077] like Figure 3As shown in (l), when the 20°C water just flows into the intersection A, the 20°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 37.5°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 32.5°C water;

[0078] like Figure 3 As shown in (m), when the 25°C water just flows into the intersection A, the 20°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 35°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 27.5°C water;

[0079] like Figure 3 As shown in (n), when the 30°C water just flows into the intersection A, the 25°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 32.5°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 28.75°C water;

[0080] like Figure 3 As shown in (o), when the 35°C water just flows into the intersection A, the 30°C water flows from the first parallel pipe part 22 to the intersection B and mixes with the 30°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 30°C water.

[0081] From the above, we can see that Figure 3 (a) to Figure 3 (g) is the temperature rise stage after water outage, in which the outlet water temperature is greater than the target outlet water temperature, and the maximum outlet water temperature is 50°, which is lower than the maximum water temperature of 55°C flowing out of the outlet straight pipe section 11a. Therefore, it can achieve the goal of reducing the temperature rise amplitude after water outage and restart.

[0082] Figure 3 (g) to Figure 3 (o) is the cooling stage after the temperature rise, and its outlet water temperature is lower than the target outlet water temperature, wherein the minimum outlet water temperature is 27.5°C, which is higher than the minimum outlet water temperature of 20°C of the outlet straight pipe section 11a. Therefore, the minimum temperature after water shut-off can be increased, the outlet water temperature fluctuation can be reduced, and the water use comfort of the gas water heater can be improved.

[0083] The present embodiment also provides a gas water heater, including the above-mentioned heat exchange component. The gas water heater provided in the present embodiment, by adopting the above-mentioned heat exchange component, can reduce the fluctuation of the water outlet temperature of the gas water heater during use, improve the water use comfort of the gas water heater, improve the user experience of the gas water heater, and reduce the probability of scaling inside the gas water heater.

[0084] Embodiment 3

[0085] like Figure 4As shown, in this embodiment, the heat exchanger 1 includes five heat exchange straight pipe sections 11, the inlet water temperature of the heat exchanger 1 is 20°C, the target outlet water temperature is 45°C, and the water volume of the outlet straight pipe section 11a is 200ml.

[0086] When the gas water heater is in normal use, the water temperature at the water inlet end of the heat exchanger 1 is 20°C, the water temperature at the water inlet end of the outlet straight pipe section 11a is 40°C, and the water temperature at the outlet end of the outlet straight pipe section 11a is 45°C. When the water is restarted after one minute of water outage, the water temperature at the water inlet end of the outlet straight pipe section 11a is 50°C, and the water temperature at the outlet end of the outlet straight pipe section 11a is 55°C.

[0087] In this embodiment, the water flow rate of the first parallel pipe portion 22 is twice the water flow rate of the first bypass water outlet pipe 3 , the water volume of the first bypass water outlet pipe 3 is 150 ml, and the water volume of the first parallel pipe portion 22 is 50 ml.

[0088] like Figure 4 (a) to Figure 4 As shown in (c), the water temperature distribution of the first parallel pipe section 22 and the first bypass water outlet pipe 3 at different times is detected within a period of time after the water supply is stopped and restarted. Figure 4 (a) to Figure 4 The detection time of (c) increases successively, that is, Figure 4 (a) Compared with the detection time Figure 4 (b) Closer to the restart time of water outage, Figure 4 The detection distance of (c) is the farthest from the start time point.

[0089] like Figure 4 As shown in (a), at this detection moment, when the 53°C water just flows into the intersection A, the 55°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 45°C water that originally flows out of the intersection B from the first bypass outlet pipe 3. The temperature of the mixed water is (55°C×2+45°C) / 3=51.7°C.

[0090] like Figure 4 As shown in (b), when the 48°C water just flows into the intersection A, the 50°C water flows from the first parallel pipe part 22 to the intersection B and mixes with the 45°C water that originally flows out of the intersection B from the first bypass outlet pipe 3 to form 48.3°C water;

[0091] like Figure 4 As shown in (c), when the 43°C water just flows into the intersection A, the 45°C water flows from the first parallel pipe section 22 to the intersection B and mixes with the 55°C water originally flowing out of the first bypass outlet pipe 3 from the intersection B to form 48.3°C water.

[0092] The present embodiment also provides a gas water heater, including the above-mentioned heat exchange component. The gas water heater provided in the present embodiment, by adopting the above-mentioned heat exchange component, can reduce the fluctuation of the water outlet temperature of the gas water heater during use, improve the water use comfort of the gas water heater, improve the user experience of the gas water heater, and reduce the probability of scaling inside the gas water heater.

[0093] Embodiment 4

[0094] This embodiment provides a heat exchange component, and the structure of the heat exchange component provided in this embodiment is basically the same as that of the heat exchange component in Embodiment 1, with only some differences in settings. This embodiment will no longer repeat the structure that is the same as that in Embodiment 1.

[0095] like Figure 5 As shown, in this embodiment, the heat exchanger 1 includes five heat exchange straight pipe sections 11, the inlet water temperature of the heat exchanger 1 is 20°C, the target outlet water temperature is 45°C, and the water volume of the outlet straight pipe section 11a is 120ml.

[0096] When the gas water heater is in normal use, the water temperature at the water inlet end of the heat exchanger 1 is 20°C, the water temperature at the water inlet end of the outlet straight pipe section 11a is 40°C, and the water temperature at the outlet end of the outlet straight pipe section 11a is 45°C. When the water is restarted after one minute of water outage, the water temperature at the water inlet end of the outlet straight pipe section 11a is 50°C, and the water temperature at the outlet end of the outlet straight pipe section 11a is 55°C.

[0097] In this embodiment, the water flow rate of the first parallel pipe portion 22 is twice the water flow rate of the first bypass water outlet pipe 3 , the water volume of the first bypass water outlet pipe 3 is 250 ml, and the water volume of the first parallel pipe portion 22 is 50 ml.

[0098] like Figure 5 (a) to Figure 5 As shown in (c), the water temperature distribution of the first parallel pipe section 22 and the first bypass water outlet pipe 3 at different times is detected within a period of time after the water supply is stopped and restarted. Figure 5 (a) to Figure 5 The detection time of (c) increases successively, that is, Figure 5 (a) Compared with the detection time Figure 5 (b) Closer to the restart time of water outage, Figure 5 The detection distance of (c) is the farthest from the start time point.

[0099] like Figure 5 As shown in (a), at this detection moment, when the 49°C water just flows into the intersection A, the 55°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 45°C water that originally flows out of the intersection B from the first bypass outlet pipe 3. The temperature of the mixed water is (55°C+45°C×2) / 3=48.3°C.

[0100] like Figure 5 As shown in (b), when the 45°C water just flows into the intersection A, the 49°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 45°C water originally flowing out of the intersection B from the first bypass outlet pipe 3 to form 46.3°C water;

[0101] like Figure 5 As shown in (c), when the 39°C water just flows into the intersection A, the 43°C water flows from the first parallel pipe section 22 to the intersection B and mixes with the 55°C water originally flowing out of the first bypass outlet pipe 3 from the intersection B to form 51°C water.

[0102] The present embodiment also provides a gas water heater, including the above-mentioned heat exchange component. The gas water heater provided in the present embodiment, by adopting the above-mentioned heat exchange component, can reduce the fluctuation of the water outlet temperature of the gas water heater during use, improve the water use comfort of the gas water heater, improve the user experience of the gas water heater, and reduce the probability of scaling inside the gas water heater.

[0103] Embodiment 5

[0104] This embodiment provides a heat exchange component, and the structure of the heat exchange component provided in this embodiment is basically the same as that of the heat exchange component in Embodiment 1, with only some differences in settings. This embodiment will no longer repeat the structure that is the same as that in Embodiment 1.

[0105] like Figure 6 As shown, in this embodiment, the heat exchanger 1 includes five heat exchange straight pipe sections 11, the inlet water temperature of the heat exchanger 1 is 20°C, the target outlet water temperature is 45°C, and the water volume of the outlet straight pipe section 11a is 90ml.

[0106] When the gas water heater is in normal use, the water temperature at the water inlet end of the heat exchanger 1 is 20°C, the water temperature at the water inlet end of the outlet straight pipe section 11a is 40°C, and the water temperature at the outlet end of the outlet straight pipe section 11a is 45°C. When the water is restarted after one minute of water outage, the water temperature at the water inlet end of the outlet straight pipe section 11a is 50°C, and the water temperature at the outlet end of the outlet straight pipe section 11a is 55°C.

[0107] In this embodiment, the water flow rate of the first parallel pipe portion 22 is twice the water flow rate of the first bypass water outlet pipe 3 , the water volume of the first bypass water outlet pipe 3 is 250 ml, and the water volume of the first parallel pipe portion 22 is 10 ml.

[0108] like Figure 6 (a) to Figure 6 As shown in (c), the water temperature distribution of the first parallel pipe section 22 and the first bypass water outlet pipe 3 at different times is detected within a period of time after the water supply is stopped and restarted. Figure 6 (a) to Figure 6The detection time of (c) increases successively, that is, Figure 6 (a) Compared with the detection time Figure 6 (b) Closer to the restart time of water outage, Figure 6 The detection distance of (c) is the farthest from the start time point.

[0109] like Figure 6 As shown in (a), at this detection moment, when the 43°C water just flows into the intersection A, the 55°C water flows from the first parallel pipe part 22 to the intersection B, and mixes with the 45°C water that originally flows out of the intersection B from the first bypass outlet pipe 3. The temperature of the mixed water is (55°C+45°C×2) / 3=48.3°C.

[0110] like Figure 6 As shown in (b), when the 42.5°C water just flows into the intersection A, the 45.5°C water flows from the first parallel pipe portion 22 to the intersection B and mixes with the 45°C water that originally flows out of the intersection B from the first bypass outlet pipe 3 to form 45.1°C water;

[0111] like Figure 6 As shown in (c), when the 39°C water just flows into the intersection A, the 43°C water flows from the first parallel pipe section 22 to the intersection B and mixes with the 55°C water originally flowing out of the first bypass outlet pipe 3 from the intersection B to form 48.7°C water.

[0112] The present embodiment also provides a gas water heater, including the above-mentioned heat exchange component. The gas water heater provided in the present embodiment, by adopting the above-mentioned heat exchange component, can reduce the fluctuation of the water outlet temperature of the gas water heater during use, improve the water use comfort of the gas water heater, improve the user experience of the gas water heater, and reduce the probability of scaling inside the gas water heater.

[0113] Embodiment 6

[0114] This embodiment provides a heat exchange component, and the heat exchange component provided in this embodiment is a further improvement based on the first embodiment. This embodiment will not repeat the same contents as the first embodiment.

[0115] like Figure 7 As shown, in this embodiment, the heat exchange component also includes a second bypass water outlet pipe 4, which is arranged in parallel with the first bypass water outlet pipe 3 and the first parallel pipe portion 22, and the ratio of the water volume to the water flow of the second bypass water outlet pipe 4 is different from the ratio of the water capacity to the water flow of the first bypass water outlet pipe 3 and the ratio of the water volume to the water flow of the first parallel pipe portion 22.

[0116] By setting a second bypass water outlet pipe 4, and setting the second bypass water outlet pipe 4 and the first bypass water outlet pipe 3 and the first parallel pipe portion 22 in parallel, the water flow downstream of the intersection A can be diverted and remixed for a second time, thereby further reducing the temperature rise after the water supply is cut off, and avoiding the problem of the temperature of the water flowing out of the main water outlet pipe 2 being too low, thereby improving the consistency of the water outlet temperature of the total water outlet pipe and improving the water use experience of the gas water heater.

[0117] In this embodiment, both ends of the second bypass water outlet pipe 4 are connected to the first parallel pipe portion 22, that is, the water inlet end of the second bypass water outlet pipe 4 and the first parallel pipe portion 22 have an intersection C, and the water outlet end of the second bypass water outlet pipe 4 and the first parallel pipe portion 22 have an intersection D, and the intersection points A, C, D and B are arranged in sequence along the extension direction of the main water outlet pipe 2.

[0118] In order to improve the convenience of setting the second bypass water outlet pipe 4, the water volume of the second bypass water outlet pipe 4 is smaller than the water volume of the first bypass water outlet pipe 3. Further, the diameter of the second bypass water outlet pipe 4 is smaller than the diameter of the first bypass water outlet pipe 3 and / or the length of the first bypass water outlet pipe 3 is smaller than the length of the second bypass water outlet pipe 4.

[0119] The present embodiment also provides a gas water heater, including the above-mentioned heat exchange component. The gas water heater provided in the present embodiment, by adopting the above-mentioned heat exchange component, can reduce the fluctuation of the water outlet temperature of the gas water heater during use, improve the water use comfort of the gas water heater, improve the user experience of the gas water heater, and reduce the probability of scaling inside the gas water heater.

[0120] Embodiment 7

[0121] This embodiment provides a heat exchange component, and the heat exchange component provided in this embodiment is a further improvement based on the first embodiment. This embodiment will not repeat the same contents as the first embodiment.

[0122] like Figure 8 As shown, in this embodiment, the heat exchange component also includes a second bypass water outlet pipe 4, which is arranged in parallel with the first bypass water outlet pipe 3 and the first parallel pipe portion 22, and the ratio of the water volume to the water flow of the second bypass water outlet pipe 4 is different from the ratio of the water capacity to the water flow of the first bypass water outlet pipe 3 and the ratio of the water volume to the water flow of the first parallel pipe portion 22.

[0123] By setting a second bypass water outlet pipe 4, and setting the second bypass water outlet pipe 4 and the first bypass water outlet pipe 3 and the first parallel pipe portion 22 in parallel, the water flow downstream of the intersection A can be diverted and remixed for a second time, thereby further reducing the temperature rise after the water supply is cut off, and avoiding the problem of the temperature of the water flowing out of the main water outlet pipe 2 being too low, thereby improving the consistency of the water outlet temperature of the total water outlet pipe and improving the water use experience of the gas water heater.

[0124] In this embodiment, both ends of the second bypass water outlet pipe 4 flow with the first bypass water outlet pipe 3 respectively, that is, the water inlet end of the second bypass water outlet pipe 4 and the first bypass water outlet pipe 3 have an intersection point C, and the water outlet end of the second bypass water outlet pipe 4 and the first bypass water outlet pipe 3 have an intersection point D, and the intersection point C is located upstream of the intersection point D.

[0125] Preferably, the water volume of the second bypass water outlet pipe 4 is smaller than the water volume of the first bypass water outlet pipe 3, so as to improve the convenience of setting and connecting the second bypass water outlet pipe 4. Further, the diameter of the second bypass water outlet pipe 4 is smaller than the diameter of the first bypass water outlet pipe 3; and / or, the length of the second bypass water outlet pipe 4 is smaller than the length of the first bypass water outlet pipe 3.

[0126] The present embodiment also provides a gas water heater, including the above-mentioned heat exchange component. The gas water heater provided in the present embodiment, by adopting the above-mentioned heat exchange component, can reduce the fluctuation of the water outlet temperature of the gas water heater during use, improve the water use comfort of the gas water heater, improve the user experience of the gas water heater, and reduce the probability of scaling inside the gas water heater.

[0127] Embodiment 8

[0128] This embodiment provides a heat exchange component, and the heat exchange component provided in this embodiment is a further improvement based on the first embodiment. This embodiment will not repeat the same contents as the first embodiment.

[0129] like Fig. 9 As shown, the heat exchange assembly further includes a second bypass water outlet pipe 4, both ends of the second bypass water outlet pipe 4 are connected to the main water outlet pipe 2, and the main water outlet pipe 2 has a second parallel pipe portion 23 connected in parallel with the second bypass water outlet pipe 4. The ratio of water volume / water flow of the second parallel pipe portion 23 is different from the ratio of water volume / water flow of the second bypass water outlet pipe 4, and the ratio of water volume / water flow of the second parallel pipe portion 23 is different from the ratio of water volume / water flow of the first parallel pipe portion 22.

[0130] By setting up a second bypass water outlet pipe 4 and connecting the second bypass water outlet pipe 4 with the main water outlet pipe 2, the water flow downstream of the intersection B can be diverted and remixed for a second time, thereby further reducing the temperature rise after the water supply is cut off and avoiding the problem of the temperature of the water flowing out of the main water outlet pipe 2 being too low, thereby improving the consistency of the water outlet temperature of the total water outlet pipe and improving the water use experience of the gas water heater.

[0131] In this embodiment, the water volume of the second bypass water outlet pipe 4 is smaller than the water volume of the first bypass water outlet pipe 3, so as to improve the convenience of setting the second bypass water outlet pipe 4. Specifically, the diameter of the second bypass water outlet pipe 4 is smaller than the diameter of the first bypass water outlet pipe 3; and / or, the length of the second bypass water outlet pipe 4 is smaller than the length of the first bypass water outlet pipe 3.

[0132] The present embodiment also provides a gas water heater, including the above-mentioned heat exchange component. The gas water heater provided in the present embodiment, by adopting the above-mentioned heat exchange component, can reduce the fluctuation of the water outlet temperature of the gas water heater during use, improve the water use comfort of the gas water heater, improve the user experience of the gas water heater, and reduce the probability of scaling inside the gas water heater.

[0133] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0134] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A heat exchange component, characterized in that: The invention comprises a heat exchanger (1), a main water outlet pipe (2) and a first bypass water outlet pipe (3); the water inlet end of the main water outlet pipe (2) is connected to the water outlet end of the heat exchanger (1); both ends of the first bypass water outlet pipe (3) are connected to the main water outlet pipe (2); the main water outlet pipe (2) comprises a first parallel pipe portion (22) connected in parallel with the first bypass water outlet pipe (3) and a main pipe portion (21) located between the water inlet end of the first parallel pipe portion (22) and the heat exchanger (1); the ratio of water volume to water flow of the first parallel pipe portion (22) is different from the ratio of water volume to water flow of the first bypass water outlet pipe (3).

2. The heat exchange assembly according to claim 1, characterized in that: The ratio of the water flow rate of the first bypass water outlet pipe (3) to the water flow rate of the main pipe portion (21) is 0.2 to 0.

8.

3. The heat exchange assembly according to claim 1, characterized in that: The heat exchanger (1) comprises a plurality of heat exchange straight pipe sections (11) which are bent and connected in sequence, and the heat exchange straight pipe section (11) connected to the main water outlet pipe (2) is a water outlet straight pipe section (11a); The water volume of the first bypass water outlet pipe (3) is greater than the water volume of the first parallel pipe section (22), and the ratio of the water volume of the first bypass water outlet pipe (3) to the water volume of the water outlet straight pipe section (11a) is 0.3 to 5; or the water volume of the first parallel pipe section (22) is greater than the water volume of the first bypass water outlet pipe (3), and the ratio of the water volume of the first parallel pipe section (22) to the water volume of the water outlet straight pipe section (11a) is 0.3 to 5.

4. The heat exchange assembly according to claim 3, characterized in that: The ratio of the water flow rate of the first bypass water outlet pipe (3) to the water flow rate of the first parallel pipe part (22) is 0.9 to 1.1; The one with a larger water volume between the first bypass water outlet pipe (3) and the first parallel pipe section (22) is the first water outlet pipe, and the other is the second water outlet pipe. The ratio of the water volume of the first water outlet pipe to the water volume of the water outlet straight pipe section (11a) is greater than 0.

5.

5. The heat exchange assembly according to claim 1, characterized in that: The one with a larger water flow rate among the first bypass water outlet pipe (3) and the first parallel pipe part (22) is the first water outlet pipe, and the other is the second water outlet pipe, the ratio of the water flow rate of the first water outlet pipe to the water flow rate of the second water outlet pipe is greater than or equal to 2, and the ratio of the water volume of the second water outlet pipe to the water volume of the first water outlet pipe is greater than 3; Alternatively, the one with a larger water flow rate between the first bypass water outlet pipe (3) and the first parallel pipe portion (22) is the first water outlet pipe, and the other is the second water outlet pipe, the ratio of the water flow rate of the first water outlet pipe to the water flow rate of the second water outlet pipe is greater than or equal to 2, and the water volume of the first water outlet pipe is greater than or equal to the water volume of the second water outlet pipe.

6. The heat exchange assembly according to any one of claims 1 to 5, characterized in that: The ratio of the water volume to the water flow of the first bypass water outlet pipe (3) is A, the ratio of the water flow to the water volume of the first parallel pipe part (22) is B, A≥4B, or B≥4A.

7. The heat exchange assembly according to any one of claims 1 to 5, characterized in that: The heat exchange component further comprises a second bypass water outlet pipe (4), the second bypass water outlet pipe (4) being arranged in parallel with the first bypass water outlet pipe (3) and the first parallel pipe section (22), the ratio of the water volume to the water flow of the second bypass water outlet pipe (4) being different from the ratio of the water volume to the water flow of the first bypass water outlet pipe (3), and the ratio of the water volume to the water flow of the bypass water outlet pipe (4) being different from the ratio of the water volume to the water flow of the first parallel pipe section (22).

8. The heat exchange assembly according to claim 7, characterized in that: Both ends of the second bypass water outlet pipe (4) are connected to the first parallel pipe portion (22); Alternatively, both ends of the second bypass water outlet pipe (4) are connected to the first bypass water outlet pipe (3).

9. The heat exchange assembly according to any one of claims 1 to 5, characterized in that: The heat exchange assembly further comprises a second bypass water outlet pipe (4), both ends of the second bypass water outlet pipe (4) are connected to the main water outlet pipe (2), and the main water outlet pipe (2) has a second parallel pipe portion (23) connected in parallel with the second bypass water outlet pipe (4); The water volume / water flow ratio of the second parallel pipe section (23) is different from the water volume / water flow ratio of the second bypass water outlet pipe (4), and the water volume / water flow ratio of the second parallel pipe section (23) is different from the water volume / water flow ratio of the first parallel pipe section (22).

10. A gas water heater, characterized in that: Comprising the heat exchange component as described in any one of claims 1-9.

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