Gas water heater

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a gas water heater which comprises a burner, a water inlet pipe, a heat exchanger and a water outlet pipe, the water inlet pipe, the heat exchanger and the water outlet pipe are sequentially communicated, the burner can supply heat to the heat exchanger, and the water inlet pipe is provided with a flow sensor. Specifically, the water outlet pipe comprises a first water outlet section and a second water outlet section, the gas water heater further comprises a water tank and a bypass pipe, the water tank is provided with a first water inlet, a second water inlet, a water outlet and a slow flow structure, the slow flow structure is located between the first water inlet and the second water inlet, and one end of the bypass pipe communicates with the water inlet pipe. The total volume of the water tank is V1, an energy storage cavity is formed between the flow slowing structure and the first water inlet, the volume of the energy storage cavity is V2, and V2 is larger than 0.5 V1 and smaller than V1, so that the problem that when the gas water heater is started for the second time, the temperature difference between two sections of outlet water is large can be effectively solved.

Description

Technical Field

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

[0002] Gas water heaters in the prior art often include a water inlet pipe, a heat exchanger and a water outlet pipe that are connected in sequence. The water inlet pipe is provided with a flow sensor. When a user turns on the shower or faucet to use the gas water heater, the water heater usually detects a certain amount of water flow through the flow sensor, and then ignites to heat the heat exchanger. Therefore, there will be a certain time difference when the gas water heater is started, resulting in a portion of the water not being fully heated.

[0003] When a user uses the gas water heater and encounters a situation where he needs to suspend the use of the gas water heater, for example, he needs to turn off the water to apply shower gel, during the pause time, the water in the heat exchanger will be further heated by the waste heat of the heat exchanger, resulting in the water temperature of that part being too high. When the user restarts the gas water heater, due to a certain time difference when the gas water heater is started, a part of the water cannot be fully heated. Therefore, when the user starts the gas water heater for the second time, the water outlet temperature will be too high and too low in succession, that is, the temperature difference between the two sections of water outlet will be extremely large, and then it returns to the preset temperature, resulting in a poor user experience. Utility Model Content

[0004] One of the technical problems solved by the utility model is to provide a gas water heater, which can effectively solve the problem of a large temperature difference between two consecutive water outlets when the gas water heater is started for the second time.

[0005] The above technical problems are solved by the following technical solutions:

[0006] A gas water heater comprises a burner and a water inlet pipe, a heat exchanger and a water outlet pipe which are connected in sequence, wherein the burner can provide heat for the heat exchanger, the water inlet pipe is provided with a flow sensor, the water outlet pipe comprises a first water outlet section and a second water outlet section, and the gas water heater further comprises:

[0007] A water tank, wherein the water tank is provided with a first water inlet, a second water inlet, a water outlet and a slow flow structure, the first water outlet section is connected to the first water inlet, the second water outlet section is connected to the water outlet, the second water inlet is located between the first water inlet and the water outlet, and the slow flow structure is located between the first water inlet and the second water inlet; and,

[0008] A bypass pipe, one end of which is connected to the water inlet pipe, and the other end of which is connected to the second water inlet, and the bypass pipe is provided with a water volume regulating mechanism;

[0009] The total volume of the water tank is V1, and an energy storage cavity is formed between the slow flow structure and the first water inlet. The volume of the energy storage cavity is V2, and 0.5V1<V2<V1.

[0010] Compared with the background technology, the gas water heater of the utility model has the following beneficial effects:

[0011] By setting a water tank and a bypass pipe, on the one hand, the energy storage chamber of the water tank can be used to receive the water output from the heat exchanger to the first water inlet through the first water outlet section, so that when the gas water heater is started for the second time, the two sections of water with a large temperature difference output from the heat exchanger can be mixed in the energy storage chamber, so that the heat of the part of water that is not fully heated can be compensated by using the overheated part of the water, and the outlet temperature difference of the two sections of water can be reduced. On the other hand, by setting a bypass pipe, a part of the cold water in the water inlet pipe can flow directly through the bypass pipe to the inside of the water tank near the second water inlet, so as to be mixed with the hot water flowing from the energy storage chamber to the second water inlet to obtain water of a preset temperature. In addition, when the gas water heater is working, due to the effect of the bypass pipe, the water flow from the water inlet pipe to the heat exchanger is less than that in the case without the bypass pipe, thereby increasing the water temperature of the water output from the heat exchanger, so that the hot water temperature stored in the energy storage chamber of the water tank is higher, which can be used as energy storage for subsequent bypass adjustment of constant temperature.

[0012] In addition, by arranging a slow flow structure in the water tank between the second water inlet and the first water inlet, a certain barrier can be formed on the water flowing from the energy storage chamber to the vicinity of the second water inlet, so as to prevent the hot water in the energy storage chamber from flowing quickly to the vicinity of the second water inlet to mix with the cold water output from the second water inlet, so that the hot water can be retained in the energy storage chamber for a longer time, so that the heat of the hot water can be stored in the energy storage chamber for a longer time, so that the heat stored in the energy storage chamber can provide more heat compensation for the part of the water that is not fully heated. And by arranging a turbulent flow structure in the water tank between the slow flow structure and the water outlet, the cold water entering the water tank from the slow flow structure through the bypass pipe and the hot water flowing from the first water inlet to the vicinity of the second water inlet can be mixed more fully in the water tank, so as to further reduce the temperature fluctuation amplitude of the water transported from the slow flow structure to the second water outlet section to be output to the gas water heater.

[0013] Furthermore, since the larger the volume of the energy storage chamber accounts for the total volume of the water tank, the better the heat storage effect of the energy storage chamber. Therefore, by making the volume of the energy storage chamber account for more than one half of the total volume of the water tank, when the gas water heater is started for the second time, the hot water stored in the energy storage chamber can be used to more effectively provide sufficient heat compensation for the part of the water that is not fully heated, so as to control the temperature fluctuation amplitude of the water output from the gas water heater within a smaller range.

[0014] In one embodiment, V2 ≥ (2 / 3) V1.

[0015] In one embodiment, V2<0.9V1.

[0016] In one embodiment, the slow-flow structure is provided with a narrowing portion, and the cross-sectional area of ​​the narrowing portion is smaller than the cross-sectional area of ​​the energy storage cavity.

[0017] In one embodiment, the flow-slowing structure includes a first baffle, which divides the internal space of the water tank into the energy storage chamber and the remaining space. The first baffle is provided with a plurality of first through holes at intervals, and the plurality of first through holes constitute the narrowing portion.

[0018] In one embodiment, the gas water heater further includes a flow disturbance structure, the flow disturbance structure is located between the slow flow structure and the water outlet, the flow disturbance structure includes a second baffle, a mixing chamber is formed between the second baffle and the slow flow structure, a drainage chamber is formed between the second baffle and the water outlet, and a plurality of second through holes are provided at intervals on the second baffle, and the second through holes are connected between the mixing chamber and the drainage chamber;

[0019] The volume of the mixing chamber is V3, the volume of the drainage chamber is V4, and V2>V3>V4.

[0020] In one of the embodiments, along the relative direction between the mixing chamber and the drainage chamber, the size of the mixing chamber is larger than the size of the second water inlet.

[0021] In one embodiment, the spoiler structure further comprises a spoiler tube, the interior of the spoiler tube is connected to the bypass pipe, a plurality of first spoiler holes are provided at intervals on the spoiler tube, and the first spoiler holes are connected between the interior of the spoiler tube and the interior of the water tank; and / or,

[0022] The spoiler structure also includes a partition structure, which divides the mixing chamber into a first chamber and a second chamber. The energy storage chamber and the bypass pipe are both connected to the first chamber, and the second chamber is connected to the drainage chamber. A plurality of second spoiler holes are arranged at intervals on the partition structure, and the second spoiler holes are connected between the first chamber and the second chamber.

[0023] In one embodiment, 0.1L≤V1≤0.8L.

[0024] In one embodiment, along the gravity direction, the first water inlet is located above the second water inlet, and the second water inlet is located above the water outlet.

[0025] In one embodiment, the water volume regulating mechanism is a water proportional valve; or,

[0026] The water volume regulating mechanism is a three-way water proportional valve, the water inlet pipe includes a first water inlet section and a second water inlet section, the water volume regulating mechanism is respectively connected to the first water inlet section, the second water inlet section and the bypass pipe, and the end of the second water inlet section away from the water volume regulating mechanism is connected to the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described in detail below based on the drawings and embodiments.

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

[0029] Figure 2 A partial schematic diagram of the three-dimensional structure of a water tank, a first water outlet section, a second water outlet section and a bypass pipe provided in one embodiment of the utility model;

[0030] Figure 3 A schematic diagram of the partial structure of a water tank, a first water outlet section, a second water outlet section and a bypass pipe provided in one embodiment of the utility model;

[0031] Figure 4 A schematic diagram of the partial structure of a water tank (when a turbulent structure is provided in the mixing chamber) provided in an embodiment of the utility model;

[0032] Figure 5 A schematic diagram of the partial structure of a gas water heater provided in the first embodiment of the utility model;

[0033] Figure 6 A schematic diagram of a partial structure of a gas water heater provided in a second embodiment of the utility model;

[0034] Figure 7 A schematic diagram of a partial structure of a gas water heater provided in a third embodiment of the utility model;

[0035] Figure 8 This is a schematic diagram of the partial structure of a gas water heater provided in the fourth embodiment of the utility model.

[0036] Description of labels:

[0037] 1. Gas water heater;

[0038] 10. water inlet pipe; 100. flow sensor; 101. first water inlet section; 102. second water inlet section;

[0039] 11. Heat exchanger;

[0040] 12, water outlet pipe; 121, first water outlet section; 122, second water outlet section;

[0041] 13, water tank; 13a, first water inlet; 13b, second water inlet; 13c, water outlet; 13d, narrowing portion; 131, energy storage chamber; 132, slow flow structure; 1320, first baffle; 1320a, first through hole; 133, mixing chamber; 133a, first chamber; 133b, second chamber; 134, drainage chamber; 152, second baffle; 152a, second through hole;

[0042] 14, bypass pipe; 140, water volume regulating mechanism; 141, bypass branch pipe; 141a, first end; 141b, second end;

[0043] 15, spoiler structure; 150, spoiler tube; 150a, first spoiler hole; 151, partition structure; 151a, second spoiler hole;

[0044] 161. A first temperature sensor; 162. A second temperature sensor; 163. A third temperature sensor. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] like Figure 1 and Figure 2 As shown, a gas water heater 1 comprises a burner and a water inlet pipe 10, a heat exchanger 11 and a water outlet pipe 12 which are connected in sequence. The burner can provide heat for the heat exchanger 11. The water inlet pipe 10 is provided with a flow sensor 100. Specifically, the water outlet pipe 12 comprises a first water outlet section 121 and a second water outlet section 122. The gas water heater 1 also comprises a water tank 13 and a bypass pipe 14. The water tank 13 is provided with a first water inlet 13a, a second water inlet 13b, a water outlet 13c and a slow flow structure 132. The first water outlet section 121 is connected to the first water inlet 13a, the second water outlet section 122 is connected to the water outlet 13c, and the second water inlet 13b is located between the first water inlet 13a and the water outlet. 13c, the slow-flow structure 132 is located between the first water inlet 13a and the second water inlet 13b, one end of the bypass pipe 14 is connected to the water inlet pipe 10, and the other end is connected to the second water inlet 13b. The bypass pipe 14 is provided with a water volume regulating mechanism 140, wherein the total volume of the water tank 13 is V1, and an energy storage chamber 131 is formed between the slow-flow structure 132 and the first water inlet 13a, and the volume of the energy storage chamber 131 is V2, 0.5V1<V2<V1.

[0050] By providing the water tank 13 and the bypass pipe 14, on the one hand, the energy storage chamber 131 of the water tank 13 can be used to receive water output from the heat exchanger 11 to the first water inlet 13a through the first water outlet section 121, so that when the gas water heater 1 is started for the second time, two sections of water with a large temperature difference output successively from the heat exchanger 11 can be mixed in the energy storage chamber 131, so that the heat of the part of water that is not fully heated can be compensated by using the overheated water, thereby reducing the outlet water temperature difference between the two sections of water. On the other hand, by providing the bypass pipe 14, a part of the cold water in the water inlet pipe 10 can directly flow through the bypass pipe 14 to the inside of the water tank 13 near the second water inlet 13b, so as to be mixed with the hot water flowing from the energy storage chamber 131 to the second water inlet 13b to obtain water of a preset temperature. Furthermore, when the gas water heater 1 is working, due to the action of the bypass pipe 14, the water flow rate flowing from the water inlet pipe 10 to the heat exchanger 11 is less than that in the case where there is no bypass pipe 14, thereby increasing the water temperature of the water output from the heat exchanger 11, so that the hot water temperature stored in the energy storage chamber 131 of the water tank 13 is higher, which can be used as energy storage for subsequent bypass constant temperature adjustment.

[0051] In addition, by arranging a slow flow structure 132 in the water tank 13 between the second water inlet 13b and the first water inlet 13a, a certain barrier can be formed for the water flowing from the energy storage chamber 131 to the vicinity of the second water inlet 13b, so as to prevent the hot water in the energy storage chamber 131 from flowing quickly to the vicinity of the second water inlet 13b to mix with the cold water output from the second water inlet 13b, so that the hot water can be retained in the energy storage chamber 131 for a longer time, so that the heat of the hot water can be stored in the energy storage chamber 131 for a longer time, so that the heat stored in the energy storage chamber 131 can provide more heat compensation for the part of water that is not fully heated. By setting a turbulent structure 15 in the water tank 13 between the slow-flow structure 132 and the water outlet 13c, the cold water entering the water tank 13 from the slow-flow structure 132 through the bypass pipe 14 and the hot water flowing from the first water inlet 13a to the vicinity of the second water inlet 13b can be mixed more fully in the water tank 13, so as to further reduce the temperature fluctuation amplitude of the water transported from the slow-flow structure 132 and the water outlet 13c to the second water outlet section 122 for output to the gas water heater 1.

[0052] Furthermore, since the larger the volume of the energy storage chamber 131 accounts for the total volume of the water tank 13, the better the heat storage effect of the energy storage chamber 131. Therefore, by making the volume of the energy storage chamber 131 account for more than one half of the total volume of the water tank 13, when the gas water heater 1 is started for the second time, the hot water stored in the energy storage chamber 131 can be used to more effectively provide sufficient heat compensation for the part of the water that is not fully heated, so that the temperature fluctuation amplitude of the water output from the gas water heater 1 can be controlled within a smaller range.

[0053] Exemplarily, the volume V2 of the energy storage chamber 131 may be: 0.55V1, 0.6V1, 0.65V1, 0.7V1, 0.75V1, 0.8V1, 0.85V1, 0.9V1 or 0.95V1, etc.

[0054] In order to make the energy storage chamber 131 have a stronger energy storage function and provide more sufficient heat compensation with the part of water that is not fully heated, in one embodiment, the total volume V1 of the water tank 13 and the volume V2 of the energy storage chamber 131 can satisfy: V2 ≥ (2 / 3) V1. For example, the volume V2 of the energy storage chamber 131 can be: (2 / 3) V1, (5 / 7) V1, (3 / 4) V1, (7 / 9) V1, (4 / 5) V1, (5 / 6) V1, (6 / 7) V1, (7 / 8) V1 or (8 / 9) V1, etc.

[0055] Since the volume of the energy storage chamber 131 accounts for a larger proportion of the total volume of the water tank 13, the other space in the water tank 13 is smaller, and the hot water output from the energy storage chamber 131 and the cold water output from the second water inlet 13b need to be mixed in the other space in the water tank 13 to be discharged from the water outlet 13c, the smaller the other space in the water tank 13, the shorter the mixing time of the hot water and the cold water, the worse the mixing uniformity of the hot water and the cold water, which will lead to the worse temperature stability of the water discharged from the water outlet 13c. Based on this, in order to avoid the volume of the energy storage chamber 131 accounting for too large a proportion of the total volume of the water tank 13, which will cause the water tank 13 to be filled with cold water. In order to solve the problem of other spaces being too small, in one embodiment, the total volume V1 of the water tank 13 and the volume V2 of the energy storage chamber 131 can satisfy: V2<0.9V1. For example, V2 can be: 0.52V1, 0.54V1, 0.56V1, 0.58V1, 0.6V1, 0.62V1, 0.64V1, 0.66V1, 0.68V1, 0.7V1, 0.72V1, 0.74V1, 0.76V1, 0.78V1, 0.8V1, 0.82V1, 0.84V1, 0.85V1, 0.87V1 or 0.89V1, etc.

[0056] In one embodiment, the slow-flow structure 132 is provided with a narrowing portion 13d, and the cross-sectional area of ​​the narrowing portion 13d is smaller than the cross-sectional area of ​​the energy storage chamber 131, so that the narrowing portion 13d can reduce the flow path of water when passing through the slow-flow structure 132, so as to achieve a certain blocking effect on the water flowing from the energy storage chamber 131 to the vicinity of the second water inlet 13b.

[0057] Since the larger the water tank 13 is, the larger the possible volume of the energy storage chamber 131 is, the stronger the energy storage capacity of the energy storage chamber 131 can be, but the larger the space occupied by the water tank 13 inside the gas water heater 1 is, the water tank 13 cannot be too large. Based on this, in order to make the energy storage chamber 131 of the water tank 13 have a better energy storage capacity while avoiding the water tank 13 from excessively occupying the internal space of the gas water heater 1, in one embodiment, the total volume V1 of the water tank 13 can meet the following conditions: 0.1L≤V1≤0.8L, for example, the total volume V1 of the water tank 13 can be: 0.1L, 0.2L, 0.3L, 0.4L, 0.5L, 0.6L, 0.7L or 0.8L, etc.

[0058] In one embodiment, the slow flow structure 132 includes a first baffle 1320, which divides the internal space of the water tank 13 into an energy storage chamber 131 and the remaining space. The first baffle 1320 is provided with a plurality of first through holes 1320a at intervals, and the plurality of first through holes 1320a constitute a narrowing portion 13d, so that on the one hand, the first baffle 1320 can be used to hinder the outflow of hot water in the energy storage chamber 131, so as to reduce the possibility of the hot water entering the energy storage chamber 131 directly mixing with the water in the mixing chamber 133, so that the heat carried by the hot water can stay in the energy storage chamber 131 for a period of time. , thereby making the energy storage effect of the energy storage chamber 131 better. On the other hand, by providing the first through hole 1320a, the hot water in the energy storage chamber 131 can pass through the first through hole 1320a to enter the mixing chamber 133, and because the total opening area of ​​the first through hole 1320a on the first baffle 1320 is smaller than the total area of ​​one side plate surface of the first baffle 1320, the hot water in the energy storage chamber 131 can be accelerated when passing through the first through hole 1320a due to the reduction of the flow path, so that the hot water can enter the mixing chamber 133 at a faster speed, so that it is easier to be fully mixed with the cold water in the mixing chamber 133.

[0059] Please combine Figure 3 As shown, in another embodiment, the outer peripheral portion of the water tank 13 can also be narrowed to form a narrowing portion 13d with a narrowed flow path at one end of the energy storage chamber 131 inside the water tank 13 away from the first water inlet 13a, that is, at this time, the slow flow structure 132 includes a narrowed portion of the water tank 13 structure, so that the flow path of the energy storage chamber 131 at one end away from the first water inlet 13a can be narrowed through the narrowing portion 13d, and a certain resistance can be formed to the water flow in the process of the hot water in the energy storage chamber 131 flowing out to the vicinity of the second water inlet 13b, so that the heat carried by the hot water can stay in the energy storage chamber 131 for a period of time, and the hot water will be accelerated due to the narrowing of the flow path when passing through the narrowing portion 13d, so that it can flow to the vicinity of the second water inlet 13b at a faster speed, so as to be more easily mixed with the cold water output from the second water inlet 13b.

[0060] Furthermore, the shape of the water tank 13 can be partially narrowed outside the water tank 13 to produce the narrowed portion 13d, thereby eliminating the need to process the water tank 13 inside the water tank 13, and making the molding process of the narrowed portion 13d less difficult.

[0061] In one embodiment, the gas water heater 1 further includes a flow disturbance structure 15, the flow disturbance structure 15 is located between the slow flow structure 132 and the water outlet 13c, the flow disturbance structure 15 includes a second baffle 152, a mixing chamber 133 is formed between the second baffle 152 and the slow flow structure 132, a drainage chamber 134 is formed between the second baffle 152 and the water outlet 13c, and a plurality of second through holes 152a are provided at intervals on the second baffle 152, and the second through holes 152a are connected between the mixing chamber 133 and the drainage chamber 134, so that the drainage chamber 134 can form a buffer for the mixed hot water and cold water between the mixing chamber 133 and the second water outlet section 122, thereby causing a certain disturbance to the flow direction and flow rate of the hot water and the cold water, so that the water that is initially mixed in the hot water and cold water mixing chamber 133 can continue to mix in the drainage chamber 134 and then enter the second water outlet section 122, thereby preventing the hot water and cold water that have not been fully mixed in the mixing chamber 133 from directly entering the second water outlet section 122, and further improving the temperature stability of the water discharged from the second water outlet section 122.

[0062] Since liquid water has the characteristic that the higher the temperature, the lower the density, the hot water entering the inner cavity of the water tank 13 from the first water outlet section 121 tends to float to the top of the inner cavity of the water tank 13 along the gravity direction, and the cold water entering the inner cavity of the water tank 13 from the pipe mouth of the bypass pipe 14 tends to sink to the bottom of the inner cavity of the water tank 13 along the gravity direction. Based on this, in one of the embodiments, along the gravity direction, the first water inlet 13a is located above the second water inlet 13b, and the second water inlet 13b is located above the water outlet 13c, so that the position of the energy storage chamber 131 is more in line with the law of nature, so that the hot water entering the energy storage chamber 131 has a tendency to stay in the energy storage chamber 131, so that the energy storage effect of the energy storage chamber 131 is better, such as Figure 2 As shown, Figure 2 The arrows in the figure show the up and down directions of the water tank 13 along the direction of gravity when in use.

[0063] When the internal space of the water tank 13 is divided into the energy storage chamber 131, the mixing chamber 133 and the drainage chamber 134 as described in the aforementioned technical solution, such an arrangement can also make the energy storage chamber 131 located above the mixing chamber 133 and the mixing chamber 133 located above the drainage chamber 134 along the gravity direction, so that the relative positions of the energy storage chamber 131 and the mixing chamber 133 conform to the laws of nature, and regardless of whether there is a partition structure 151 between the energy storage chamber 131 and the mixing chamber 133, the energy storage effect of the energy storage chamber 131 and the mixing effect of the mixing chamber 133 can be made more reliable.

[0064] Furthermore, since the energy storage chamber 131 continuously receives hot water output from the first water outlet section 121 during the use of the gas water heater 1, the hot water newly entering the energy storage chamber 131 will squeeze part of the hot water originally in the energy storage chamber 131 toward the mixing chamber 133 located below, and the water in the mixing chamber 133 as a whole will also have a tendency to flow downward to enter the drainage chamber 134.

[0065] In other embodiments, the energy storage chamber 131 and the mixing chamber 133 and / or the mixing chamber 133 and the drainage chamber 134 may also be arranged in the horizontal direction, and there may be a partition structure such as a first baffle 1320 between the energy storage chamber 131 and the mixing chamber 133, so that the water storing heat can stay in the energy storage chamber 131 for a longer time, and there may be a partition structure 151 such as a second baffle 152 between the mixing chamber 133 and the drainage chamber 134, so that the hot water and the cold water can be pre-mixed for a longer time in the mixing chamber 133, so that the energy storage effect of the energy storage chamber 131 and the pre-mixing effect of the mixing chamber 133 can meet the use requirements, and at the same time, the arrangement of the energy storage chamber 131, the mixing chamber 133 and the drainage chamber 134 is more flexible, so as to be applicable to more different setting space conditions inside the gas water heater 1.

[0066] The volume of the mixing chamber 133 is V3, and the volume of the drainage chamber 134 is V4. Since the more fully the hot water and the cold water are mixed at the first time, the more stable the temperature of the water obtained after passing through the spoiler structure 15 and remixing in the drainage chamber 134, therefore, in one embodiment, the volume V3 of the mixing chamber 133 and the volume V4 of the drainage chamber 134 can satisfy: V3>V4, thereby increasing the volume proportion of the mixing chamber 133 to improve the uniformity of mixing of the hot water and the cold water, thereby further improving the temperature stability of the water discharged from the second water outlet section 122.

[0067] In addition, since the volume of the energy storage chamber 131 accounts for more than one half of the total volume of the water tank 13, the volume of the mixing chamber 133 accounts for less than one half of the total volume of the water tank 13, so that the volume V2 of the energy storage chamber 131 and the volume V3 of the mixing chamber 133 satisfy: V2>V3.

[0068] As shown in the following table, the table is a table of the rise and fall of the outlet water temperature of the gas water heater 1 after the second start. Specifically, the table shows that when the output water flow rate from the first water inlet 13a is 10L / min, the inlet water temperature of the water inlet pipe 10 is 20°C, and the preset outlet water temperature of the second water outlet section 122 is 50°C, for the water tank 13 with a total volume V1 of 3L and a volume V3 of 0.08L in the mixing chamber 13, the water tank 13 is turned off for 10 seconds and then started for the second time. The water temperature test shows the maximum temperature drop and maximum temperature rise data of the secondary outlet water compared to the preset temperature.

[0069]

[0070] It can be seen that when the volume V2 of the energy storage chamber 131 is greater than or equal to 2 / 3V1, and V3>V4, the water temperature rise and fall range of the secondary water outlet after the secondary start-up can be controlled within ±2°C, that is, the water temperature change felt by the customer can be smaller. Therefore, V2≥(2 / 3)V1 and V3>V4 can be made so that the temperature stability of the water discharged from the second water outlet section 122 is better.

[0071] In order to prevent the cold water transported from the second water inlet 13b to the inside of the water tank 13 from directly entering the energy storage chamber 131, resulting in a decrease in the energy storage effect of the energy storage chamber 131, the second water inlet 13b cannot be directly connected to the energy storage chamber 131. In order to prevent the cold water transported from the second water inlet 13b to the inside of the water tank 13 from directly entering the drainage chamber 134, resulting in part of the cold water being unable to be premixed with the hot water in the mixing chamber 133, thereby affecting the stability of the water temperature discharged from the second water outlet section 122, the second water inlet 13b cannot be directly connected to the drainage chamber 134. Based on this, in one of the embodiments, along the relative directions of the mixing chamber 133 and the drainage chamber 134, the size of the mixing chamber 133 is larger than the size of the second water inlet 13b, so that the second water inlet 13b can only be connected to the mixing chamber 133, so as to avoid the situation where the second water inlet 13b is too large and partially directly connected to the energy storage chamber 131 or the drainage chamber 134.

[0072] like Figure 4 As shown, in one embodiment, the spoiler structure 15 also includes a spoiler cylinder 150, the interior of the spoiler cylinder 150 is connected to the bypass pipe 14, and a plurality of first spoiler holes 150a are provided on the spoiler cylinder 150 at intervals. The first spoiler holes 150a are connected between the interior of the spoiler cylinder 150 and the interior of the water tank 13, so that the cold water in the bypass pipe 14 needs to flow through the interior of the spoiler cylinder 150 and the first spoiler holes 150a in sequence to enter the mixing chamber 133. Since the total opening area of ​​the first spoiler holes 150a on the first baffle 1320 is smaller than the total area of ​​the outer surface of the spoiler cylinder 150, the cold water can be accelerated due to the reduction of the flow path when passing through the first spoiler holes 150a, so that the cold water is easier to form a turbulence after entering the mixing chamber 133, so that it is easier to fully mix with the hot water in the mixing chamber 133.

[0073] In another embodiment, the spoiler structure 15 further includes a partition structure 151, which divides the mixing chamber 133 into a first chamber 133a and a second chamber 133b. The energy storage chamber 131 and the bypass pipe 14 are both connected to the first chamber 133a, and the second chamber 133b is connected to the drainage chamber 134. A plurality of second spoiler holes 151a are provided at intervals on the partition structure 151, and the second spoiler holes 151a are connected between the first chamber 133a and the second chamber 133b, so that the hot water in the energy storage chamber 131 and the cold water in the bypass pipe 14 need to enter the first chamber 133a. Then the hot water flows through the second spoiler hole 151a to enter the second chamber 133b. On the one hand, the hot water and the cold water can be mixed when passing through the second spoiler hole 151a together. On the other hand, since the total opening area of ​​the second spoiler hole 151a on the partition structure 151 is smaller than the total area of ​​the surface of one side of the partition structure 151, the cold water and the hot water can be accelerated due to the reduction of the flow path when passing through the second spoiler hole 151a. Therefore, after the cold water and the hot water enter the second chamber 133b, it is easier to form a spoiler, so that it is easier to fully mix with the hot water in the second chamber 133b.

[0074] When the first baffle 1320 is provided in the water tank 13 as described in the above embodiments, the first through holes 1320a on the first baffle 1320 are all connected between the energy storage cavity 131 and the first cavity 133a.

[0075] In another exemplary embodiment, the spoiler structure 15 may include both the spoiler tube 150 and the partition structure 151 , so as to further enhance the degree of mixing of hot water and cold water in the mixing chamber 133 .

[0076] The water volume regulating mechanism 140 may have a variety of different specific structures. Next, several different water volume regulating mechanisms 140 will be introduced with examples.

[0077] In one embodiment, the water volume regulating mechanism 140 is a water proportional valve, which can be used to adjust the water flow of the bypass pipe 14 in multiple stages, or can be used to steplessly adjust the water flow of the bypass pipe 14 to adjust the bypass ratio of the gas water heater 1 with high precision.

[0078] In one embodiment, the water volume regulating mechanism 140 is a switch valve, that is, the water volume regulating mechanism 140 is a valve with only two states, closed and open, and in the open state, the flow path of the water volume regulating mechanism 140 is fixed to a set flow path. A water volume regulating mechanism 140 disposed in the bypass pipe 14 can be used to make the water flow in the bypass pipe 14 a fixed flow, or to close the bypass pipe 14 so that water does not flow, in other words, to achieve two-stage adjustment of the water flow in the bypass pipe 14.

[0079] In other embodiments, more adjustments to the water flow in the bypass pipe 14 can be achieved by disposing a variety of different bypass pipes 14 and water volume regulating mechanisms 140 .

[0080] like Figure 5 As shown, in one embodiment, the water volume regulating mechanism 140 is a switch valve, and the gas water heater 1 includes a plurality of water volume regulating mechanisms 140 , and all water volume regulating mechanisms 140 are connected in parallel, so that the overall water flow of the bypass pipe 14 can be adjusted by the water volume regulating mechanism 140 .

[0081] For example, Figure 5 It is shown in the figure that there are two water volume regulating mechanisms 140, so that when both water volume regulating mechanisms 140 are closed, no water flows in the bypass pipe 14; when one of the two water volume regulating mechanisms 140 is opened and the other is closed, the overall water flow rate of the bypass pipe 14 is equivalent to the water flow rate in the opened water volume regulating mechanism 140; when both water volume regulating mechanisms 140 are opened, the overall water flow rate of the bypass pipe 14 is equivalent to the sum of the water flow rates in the two water volume regulating mechanisms 140, thereby realizing multi-stage adjustment of the water flow rate of the bypass pipe 14.

[0082] Among them, if the water flow rates of the two water volume regulating mechanisms 140 are the same when they are in the open state, that is, the predetermined flow paths of the two water volume regulating mechanisms 140 are the same, then among the two water volume regulating mechanisms 140, when one is opened and the other is closed, no matter which one is opened, the overall water flow rate of the bypass pipe 14 is the same. Therefore, at this time, three-level adjustment of the water flow rate of the bypass pipe 14 can be achieved.

[0083] If the water flow rates of the two water volume regulating mechanisms 140 are different when they are open, that is, the predetermined flow paths of the two water volume regulating mechanisms 140 are different, then when one of the two water volume regulating mechanisms 140 is opened and the other is closed, when the two water volume regulating mechanisms 140 are opened respectively, the overall water flow rate of the bypass pipe 14 is different. Therefore, at this time, four-level adjustment of the water flow rate of the bypass pipe 14 can be achieved.

[0084] like Figure 6 As shown, in one embodiment, the water volume regulating mechanism 140 is a switch valve, and a bypass branch pipe 141 is also provided on the bypass pipe 14. The bypass branch pipe 141 is connected in parallel with at least one water volume regulating mechanism 140 so that the overall water flow of the bypass pipe 14 can be adjusted through the water volume regulating mechanism 140.

[0085] For example, Figure 6It is shown that there is only one water flow regulating mechanism 140, so that when the water flow regulating mechanism 140 is closed, the overall water flow of the bypass pipe 14 is equivalent to the water flow in the bypass branch pipe 141, and when the water flow regulating mechanism 140 is opened, the overall water flow of the bypass pipe 14 is equivalent to the sum of the water flow in the bypass branch pipe 141 and the water flow passing through the water flow regulating mechanism 140, thereby realizing two-stage adjustment of the water flow of the bypass pipe 14.

[0086] In addition, when the bypass branch pipe 141 is connected in parallel with the plurality of water volume regulating mechanisms 140 , the plurality of water volume regulating mechanisms 140 are connected in parallel in pairs, and the bypass branch pipe 141 is connected in parallel with the plurality of water volume regulating mechanisms 140 .

[0087] like Figure 7 As shown, further, the bypass branch pipe 141 has a first end 141a and a second end 141b opposite to each other, the first end 141a and the second end 141b are both connected to the bypass pipe 14, and the first end 141a is close to the water tank 13, and the second end 141b is close to the water inlet pipe 10, and a water volume regulating mechanism 140 is provided between the first end 141a and the water tank 13, or a water volume regulating mechanism 140 is provided between the second end 141b and the water inlet pipe 10, so that when the water between the first end 141a and the water tank 13 or the second end 141b and the water inlet pipe 10 When the water volume regulating mechanism 140 is closed, no water flows in the bypass pipe 14. When the water volume regulating mechanism 140 between the first end 141a and the water tank 13 or between the second end 141b and the water inlet pipe 10 is opened, the water flow rate of the bypass pipe 14 as a whole is at least the water flow rate in the bypass branch pipe 141. At this time, as described in the above technical solution, the water volume regulating mechanism 140 connected in parallel with the bypass branch pipe 141 (that is, the water volume regulating mechanism 140 provided between the first end 141a and the second end 141b) can be used to adjust the water flow rate of the bypass pipe 14 as a whole. Figure 7 The example shows that a water volume regulating mechanism 140 is provided between the second end 141 b and the water inlet pipe 10 , and there is only one water volume regulating mechanism 140 connected in parallel with the bypass branch pipe 141 .

[0088] like Figure 8 As shown, in one embodiment, the water volume regulating mechanism 140 is a three-way water proportional valve, the water inlet pipe 10 includes a first water inlet section 101 and a second water inlet section 102, the water volume regulating mechanism 140 is respectively connected to the first water inlet section 101, the second water inlet section 102 and the bypass pipe 14, and the end of the second water inlet section 102 away from the water volume regulating mechanism 140 is connected to the heat exchanger 11, the water volume regulating mechanism 140 can receive cold water output from the first water inlet section 101, and adjust the ratio of cold water flowing to the bypass pipe 14 and the second water inlet section 102, thereby adjusting the bypass ratio of the gas water heater 1.

[0089] In the case where the gas water heater 1 is started a second time in a short period of time, the flow rate of cold water delivered to the mixing chamber 133 through the bypass pipe 14 can be reduced by adjusting the water volume regulating mechanism 140 so that at least one water volume regulating mechanism 140 is closed. This is to reduce the temperature drop of the hot water and cold water mixed in the mixing chamber 133 from the energy storage chamber 131 when the overall water temperature in the energy storage chamber 131 decreases during the second start-up. This makes the temperature of the water delivered from the mixing chamber 133 to the second water outlet section 122 more stable, thereby further reducing the temperature fluctuation of the water output by the gas water heater 1.

[0090] In addition, since the water supply of the gas water heater 1 usually shares a water supply pipe with the user's other faucets, during the use of the gas water heater 1, there may be a situation where the water flow received by the water inlet pipe 10 of the gas water heater 1 suddenly decreases or increases due to the opening or closing of other faucets in the shared water supply pipe.

[0091] When the water flow received by the water inlet pipe 10 suddenly decreases, the water flow in the heat exchanger 11 decreases, but the heating supply of the heat exchanger 11 remains stable in a short period of time, which will cause the water flowing through the heat exchanger 11 to be overheated in a short period of time, thereby causing the water temperature output from the second water outlet section 122 of the gas water heater 1 to suddenly increase.

[0092] Therefore, when the flow sensor 100 detects that the water flow in the water inlet pipe 10 decreases, the water volume regulating mechanism 140 can be opened to increase the bypass ratio of the cold water transported to the mixing chamber 133 through the bypass pipe 14, so that the superheated hot water output from the energy storage chamber 131 to the mixing chamber 133 can be mixed with sufficient cold water in the mixing chamber 133, thereby making the water temperature transported from the mixing chamber 133 to the second water outlet section 122 more stable, thereby reducing the temperature fluctuation amplitude of the water output by the gas water heater 1.

[0093] When the water flow received by the water inlet pipe 10 suddenly increases, the water flow in the heat exchanger 11 increases, but the heating supply of the heat exchanger 11 remains stable in a short time. As a result, the water flowing through the heat exchanger 11 cannot be fully heated in a short time, thereby causing the water temperature output from the second water outlet section 122 of the gas water heater 1 to suddenly drop.

[0094] Therefore, when the flow sensor 100 detects an increase in the water flow in the water inlet pipe 10, the water volume regulating mechanism 140 can be closed to reduce the bypass ratio of the cold water transported to the mixing chamber 133 through the bypass pipe 14, so that the hot water with reduced temperature output from the energy storage chamber 131 to the mixing chamber 133 can be mixed with a smaller amount of cold water in the mixing chamber 133, thereby making the water temperature transported from the mixing chamber 133 to the second water outlet section 122 more stable, thereby reducing the temperature fluctuation amplitude of the water output by the gas water heater 1.

[0095] Please see again Figure 1 In one embodiment, the gas water heater 1 further includes a first temperature sensor 161, a second temperature sensor 162 and a third temperature sensor 163. The first temperature sensor 161 is arranged on the water inlet pipe 10, the second temperature sensor 162 is arranged on the first water outlet section 121, and the third temperature sensor 163 is arranged on the second water outlet section 122, so that the inlet water temperature of the water inlet pipe 10 can be monitored by the first temperature sensor 161, the hot water temperature output by the heat exchanger 11 can be monitored by the second temperature sensor 162, and the outlet water temperature of the second water outlet section 122 can be monitored by the third temperature sensor 163, so as to better detect the inlet water temperature, the working condition of the heat exchanger 11 and the actual outlet water temperature of the gas water heater 1.

[0096] In one embodiment, the water volume regulating mechanism 140, the first temperature sensor 161, the second temperature sensor 162 and the third temperature sensor 163 are all connected to the main controller by wired or wireless communication. The main controller may include a chip with capabilities including but not limited to storage, calculation, and signal output and reception, so that the main controller can adjust the water flow rate of the bypass pipe 14 by controlling the water volume regulating mechanism 140 according to the inlet water temperature and the working condition of the heat exchanger 11 when the actual outlet water temperature of the gas water heater 1 changes, so as to adjust the bypass ratio of the gas water heater 1, and then adjust the actual outlet water temperature of the gas water heater 1, so as to make the actual outlet water temperature of the gas water heater 1 more stable.

[0097] 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.

[0098] 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 gas water heater, comprising a burner and a water inlet pipe (10), a heat exchanger (11) and a water outlet pipe (12) connected in sequence, wherein the burner can provide heat for the heat exchanger (11), the water inlet pipe (10) is provided with a flow sensor (100), and is characterized in that: The water outlet pipe (12) comprises a first water outlet section (121) and a second water outlet section (122), and the gas water heater (1) further comprises: A water tank (13), the water tank (13) being provided with a first water inlet (13a), a second water inlet (13b), a water outlet (13c), and a slow-flow structure (132), the first water outlet section (121) being in communication with the first water inlet (13a), the second water outlet section (122) being in communication with the water outlet (13c), the second water inlet (13b) being located between the first water inlet (13a) and the water outlet (13c), and the slow-flow structure (132) being located between the first water inlet (13a) and the second water inlet (13b); and, A bypass pipe (14), one end of the bypass pipe (14) being in communication with the water inlet pipe (10), and the other end of the bypass pipe (14) being in communication with the second water inlet (13b), the bypass pipe (14) being provided with a water volume regulating mechanism (140); the total volume of the water tank (13) being V1, an energy storage chamber (131) being formed between the slow flow structure (132) and the first water inlet (13a), the volume of the energy storage chamber (131) being V2, and 0.5V1<V2<V1.

2. The gas water heater according to claim 1, characterized in that: V2 ≥ (2 / 3) V1.

3. The gas water heater according to claim 1, characterized in that: V2<0.9V1.

4. The gas water heater according to claim 1, characterized in that: The slow-flow structure (132) is provided with a narrowing portion (13d), and the cross-sectional area of ​​the narrowing portion (13d) is smaller than the cross-sectional area of ​​the energy storage cavity (131).

5. The gas water heater according to claim 4, characterized in that: The slow-flow structure (132) comprises a first baffle (1320), the first baffle (1320) dividing the internal space of the water tank (13) into the energy storage chamber (131) and the remaining space, the first baffle (1320) being provided with a plurality of first through holes (1320a) at intervals, the plurality of first through holes (1320a) constituting the narrowing portion (13d).

6. The gas water heater according to claim 1, characterized in that: The gas water heater further comprises a flow disturbance structure (15), the flow disturbance structure (15) being located between the slow flow structure (132) and the water outlet (13c), the flow disturbance structure (15) comprising a second baffle (152), a mixing chamber (133) being formed between the second baffle (152) and the slow flow structure (132), a drainage chamber (134) being formed between the second baffle (152) and the water outlet (13c), a plurality of second through holes (152a) being arranged at intervals on the second baffle (152), the second through holes (152a) being connected between the mixing chamber (133) and the drainage chamber (134); The volume of the mixing chamber (133) is V3, the volume of the drainage chamber (134) is V4, and V2>V3>V4.

7. The gas water heater according to claim 6, characterized in that: Along the relative direction between the mixing chamber (133) and the drainage chamber (134), the size of the mixing chamber (133) is greater than the size of the second water inlet (13b).

8. The gas water heater according to claim 7, characterized in that: The spoiler structure (15) further comprises a spoiler tube (150), the interior of the spoiler tube (150) being connected to the bypass pipe (14), a plurality of first spoiler holes (150a) being arranged at intervals on the spoiler tube (150), the first spoiler holes (150a) being connected between the interior of the spoiler tube (150) and the interior of the water tank (13); and / or, The spoiler structure (15) further comprises a partition structure (151), wherein the partition structure (151) divides the mixing chamber (133) into a first chamber (133a) and a second chamber (133b), wherein the energy storage chamber (131) and the bypass pipe (14) are both connected to the first chamber (133a), and the second chamber (133b) is connected to the drainage chamber (134), and a plurality of second spoiler holes (151a) are arranged at intervals on the partition structure (151), and the second spoiler holes (151a) are connected between the first chamber (133a) and the second chamber (133b).

9. The gas water heater according to any one of claims 1 to 8, characterized in that: 0.1L≤V1≤0.8L.

10. The gas water heater according to any one of claims 1 to 8, characterized in that: Along the gravity direction, the first water inlet (13a) is located above the second water inlet (13b), and the second water inlet (13b) is located above the water outlet (13c).

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