Gas water heater

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a gas water heater. The gas water heater comprises a water tank, a bypass pipe and a drainage pipe. The water tank is provided with a first water inlet, a second water inlet and a water outlet, a turbulent flow structure is arranged in the water tank and divides an inner cavity of the water tank into an energy storage mixing cavity and a drainage cavity, the energy storage mixing cavity is communicated with the drainage cavity through the turbulent flow structure, and the first water inlet and the second water inlet are located in the side wall of the energy storage mixing cavity. The water outlet is located in the side wall of the energy storage mixing cavity, the outlet end of the first water outlet section communicates with the first water inlet, and the inlet end of the second water outlet section communicates with the water outlet. One end of the bypass pipe is communicated with the water inlet pipe, and the other end of the bypass pipe is communicated with the second water inlet; the inlet end of the drainage pipe is located in the drainage cavity, and the outlet end of the drainage pipe communicates with the water outlet. The non-constant water outlet temperature of the water heater can be effectively reduced or avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat supply, especially relates to a gas water heater. BACKGROUND

[0002] The gas water heater is also called gas water heater, which is a kind of gas appliance that uses gas as fuel, heats by burning and transfers heat to cold water flowing through the heat exchanger to achieve the purpose of preparing hot water.The gas water heater is favored by consumers because of its fast heating speed and low use cost.

[0003] However, the gas water heater also has the problem of unstable water temperature during use. When using the gas water heater, the user will turn off the water for a short time and then turn it on again, that is, at the second start, the water heater will produce a segment of hot water higher than the set water temperature and then continue to produce a segment of cold water, and the subsequent water flow can reach the set water temperature required by the user. When producing hot water higher than the set water temperature, the water remaining in the heat exchanger of the water heater after turning off the water is heated by the high residual temperature of the heat exchanger; after turning on the water, the water heater starts and ignites, and it takes a certain time to heat the cold water to the target temperature, that is, because of the difference in start-up time, there will be a segment of cold water that has not been heated before flowing through the heat exchanger, forming a segment of cold water after the hot water. The unstable water temperature of the water heater greatly reduces the user's experience. UTILITY MODEL CONTENTS

[0004] The technical problem solved by the utility model is to provide a gas water heater that can effectively reduce or avoid the problem of unstable water temperature of the water heater, affecting the user's experience.

[0005] The above technical problem is solved by the following technical scheme:

[0006] A gas water heater, comprising a burner and a water inlet pipe, a heat exchanger and a water outlet pipe connected in sequence, the burner can heat 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, the inlet end of the first water outlet section is communicated with the outlet end of the heat exchanger, and the gas water heater further comprises:

[0007] A water tank, the water tank has a first water inlet, a second water inlet and a water outlet, a flow disturbing structure is arranged in the water tank, the flow disturbing structure separates the inner cavity of the water tank into an energy storage and mixing cavity and a drainage cavity, the energy storage and mixing cavity and the drainage cavity are communicated through the flow disturbing structure, the first water inlet and the second water inlet are located on the side wall of the energy storage and mixing cavity, the water outlet is located on the side wall of the energy storage and mixing cavity, the outlet end of the first water outlet section is communicated with the first water inlet, and the inlet end of the second water outlet section is communicated with the water outlet.

[0008] A bypass pipe, one end of the bypass pipe being communicated with the water inlet pipe, the other end of the bypass pipe being communicated with the second water inlet, the bypass pipe being provided with a control valve;

[0009] A drain pipe, an inlet end of the drain pipe being located in the drain cavity, an outlet end of the drain pipe being communicated with the water outlet.

[0010] Compared with the background art, the gas water heater has the beneficial effects that:

[0011] In the scene of secondary use after the gas water heater is temporarily closed, the control valve opening degree is adjusted to be large, so that part of the water flow in the water inlet pipe is diverted to the second water inlet of the water tank through the bypass pipe, that is, the energy storage mixing cavity in the water tank, and the other part of the water flow flows into the heat exchanger from the water inlet pipe. The water flow flowing to the heat exchanger through the water inlet pipe is reduced due to the diversion, so as to ensure that the outlet water temperature is unchanged. The water flow in the heat exchanger is heated to a higher temperature, on the one hand, the temperature of the heat exchanger is higher, and the temperature difference with the surrounding environment is larger, so that heat dissipation is accelerated, and the buffering effect of the water tank on the high-temperature water can effectively reduce the water temperature rise. On the other hand, in the short-time secondary start stage, the water temperature in the heat exchanger is higher, more heat energy can be stored compared with the prior art without the bypass pipe, and the water tank is arranged downstream of the heat exchanger, and the water tank is divided into the energy storage mixing cavity and the drain cavity, and the energy storage mixing cavity is located between the heat exchanger outlet and the bypass pipe. Therefore, the energy storage mixing cavity is equivalent to an energy storage expansion unit of the heat exchanger, so that the heat exchanger and the energy storage mixing cavity can store more high-temperature water. In the process from the start of the burner to the normal heating process, the control valve opening degree of the bypass pipe is adjusted to be small or closed through the time delay, so that the water flow flowing to the heat exchanger through the water inlet pipe is increased, and the high-temperature water heat energy stored in the heat exchanger and the energy storage mixing cavity is released, thereby effectively reducing the water temperature drop caused by the failure to heat in time when the water heater is started, until the gas water heater is stably and normally heated.

[0012] Further, by arranging the drain pipe, and the inlet end of the drain pipe being located in the drain cavity, and the outlet end of the drain pipe being communicated with the water outlet, the passing stroke and the tortuosity of the water flow in the drain cavity can be increased, and the flow mixing effect of the water flow in the drain cavity can be enhanced.

[0013] In one of the embodiments, the energy storage mixing cavity is further divided into an energy storage cavity and a mixing cavity by a flow slowing structure, the energy storage cavity and the mixing cavity are communicated through the flow slowing structure, the first water inlet is located on the side wall of the energy storage cavity, and the second water inlet and the water outlet are located on the side wall of the mixing cavity.

[0014] In one of the embodiments, a water inlet opening is formed between the inlet end of the drain pipe and the bottom wall of the drain cavity, and the water inlet area of the water inlet opening is 1-3 times of the cross-sectional area of the nozzle of the drain pipe.

[0015] In one of the embodiments, the slow flow structure is a first partition plate provided with a first through hole communicating the energy storage cavity and the mixing cavity; and / or, the flow disturbance structure is a second partition plate provided with a second through hole communicating the mixing cavity and the drain cavity.

[0016] In one of the embodiments, the drain cavity comprises:

[0017] a main drain cavity, the outlet end of the energy storage mixing cavity communicating with the inlet end of the main drain cavity;

[0018] a secondary drain cavity downstream of the main drain cavity, the cross-sectional area of the secondary drain cavity being smaller than that of the main drain cavity, the secondary drain cavity communicating with the main drain cavity, and the inlet end of the drain pipe being located in the secondary drain cavity.

[0019] In one of the embodiments, the inlet end of the drain pipe abuts against the bottom wall of the drain cavity, and the side wall of the inlet end of the drain pipe is provided with a third water inlet opening, the area of the third water inlet opening being 1-3 times of the cross-sectional area of the nozzle of the drain pipe.

[0020] In one of the embodiments, the drain pipe comprises a partition piece and a lead-in pipe, the partition piece being covered on the flow disturbance structure to form a drain passage, the lead-in pipe being connected with the flow disturbance structure, the water inlet end of the drain pipe being the free end of the lead-in pipe, one end of the drain passage communicating with the water outlet opening, and the other end of the drain passage communicating with the lead-in pipe.

[0021] In one of the embodiments, the partition piece and the lead-in pipe are respectively located on two sides of the flow disturbance structure, the partition piece being located in the energy storage mixing cavity, and the lead-in pipe being located in the drain cavity.

[0022] In one of the embodiments, along the direction of gravity, the energy storage mixing cavity is located above the drain cavity.

[0023] In one of the embodiments, along the direction of gravity, the first water inlet opening is located above the second water inlet opening. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 a structure schematic view of the water heater provided by the first embodiment of the utility model;

[0025] Figure 2 a structure schematic view of the water tank from one perspective provided by the first embodiment of the utility model.

[0026] Figure 3 Another view of the structure of the water tank provided by the embodiment one of the utility model for structural schematic view of the first cross section of the water tank;

[0027] Figure 4 Another view of the structure of the water tank provided by the embodiment one of the utility model for structural schematic view of the first cross section of the water tank;

[0028] Figure 5 Another view of the structure of the water tank provided by the embodiment one of the utility model for structural schematic view of the first cross section of the water tank;

[0029] Figure 6 For Figure 5 Enlarged view of A in the middle;

[0030] Figure 7 The structure schematic view of the water tank provided by the embodiment two of the utility model for structural schematic view of the first cross section of the water tank;

[0031] Figure 8 The structure schematic view of the water tank provided by the embodiment two of the utility model for structural schematic view of the first cross section of the water tank;

[0032] Figure 9 For Figure 8 Enlarged view of B in the middle;

[0033] Figure 10 The structure schematic view of the water tank provided by the embodiment two of the utility model for structural schematic view of the first cross section of the water tank.

[0034] Label explanation:

[0035] 10, shell;20, heat exchanger;30, water inlet pipe;301, water inlet temperature sensor;302, flow sensor;40, bypass pipe;401, control valve;50, water outlet pipe;501, first water outlet section;5011, heat exchanger outlet temperature sensor;502, second water outlet section;5021, water tank outlet temperature sensor;60, drain pipe;601, water inlet opening;

[0036] 1, water tank;11, first water inlet;

[0037] 2, energy storage cavity;

[0038] 3, mixing cavity;31, second water inlet;

[0039] 4, drainage cavity;41, main drainage cavity;42, auxiliary drainage cavity;

[0040] 51, water outlet;

[0041] 6, turbulence structure;61, second through hole;

[0042] 7, slow flow structure;71, first through hole;

[0043] 81, introduction flow channel; 82, drainage passage; 83, introduction pipe; 831, third water inlet; 84, partition. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0045] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0046] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] Embodiment one

[0049] In order to solve the problem of temperature rise and temperature drop of the existing gas water heater after it is started again after a short time of closing, which leads to the inconstant water temperature of the gas water heater, the present embodiment provides a gas water heater.

[0050] Specifically, referring to Figure 1In this embodiment, the gas water heater includes a burner and an inlet pipe 30, a heat exchanger 20 and an outlet pipe 50 connected in sequence. The burner can heat the heat exchanger 20. The inlet pipe 30 is equipped with a flow sensor 302. The outlet pipe 50 includes a first outlet section 501 and a second outlet section 502. The inlet end of the first outlet section 501 is connected to the outlet end of the heat exchanger 20.

[0051] See Figures 1-4 The gas water heater also includes a water tank 1, a bypass pipe 40, and a drain pipe 60.

[0052] Water tank 1 has a first inlet 11, a second inlet 31, and an outlet 51. (See also...) Figure 5 and Figure 6 The water tank 1 is equipped with a turbulence structure 6, which divides the inner cavity of the water tank 1 into an energy storage mixing chamber and a drainage chamber 4. The energy storage mixing chamber and the drainage chamber 4 are connected through the turbulence structure 6. The first water inlet 11 and the second water inlet 31 are located on the side wall of the energy storage mixing chamber, and the water outlet 51 is located on the side wall of the energy storage mixing chamber. The outlet end of the first water outlet section 501 is connected to the first water inlet 11, and the inlet end of the second water outlet section 502 is connected to the water outlet 51.

[0053] One end of the bypass pipe 40 is connected to the inlet pipe 30, and the other end is connected to the second inlet 31. The bypass pipe 40 is equipped with a control valve 401. Optionally, the control valve 401 is a water proportioning valve, which enables the flow rate of cold water delivered from the inlet pipe 30 to the mixing chamber 3 to be adjustable.

[0054] The inlet end of the drain pipe 60 is located in the drain chamber 4, and the outlet end of the drain pipe 60 is connected to the outlet 51.

[0055] The gas water heater provided by the embodiment is provided with a water tank 1, a bypass pipe 40 provided with a control valve 401, and the water tank 1 is arranged at one end of the bypass pipe 40. In the case of secondary use after the gas water heater is temporarily closed, the opening of the control valve 401 can be adjusted to be large, so that part of the water flow in the water inlet pipe 30 is diverted to flow from the bypass pipe 40 to the second water inlet 31 of the water tank 1, that is, into the energy storage mixing cavity of the water tank 1, and at the same time, another part of the water flow flows from the water inlet pipe 30 to the heat exchanger 20. The water flow flowing to the heat exchanger 20 through the water inlet pipe 30 is reduced due to the diversion, so as to ensure that the outlet water temperature is unchanged, and the water flow in the heat exchanger 20 is heated to a higher temperature. On the one hand, the temperature of the heat exchanger 20 is higher, and the temperature difference with the surrounding environment is larger, so that heat dissipation can be accelerated, and in addition, the buffering effect of the water tank 1 on the high-temperature water can effectively reduce the water temperature rise during the water stop. On the other hand, in the short-time secondary starting stage, due to the higher water temperature in the heat exchanger 20, more heat energy can be stored compared with the prior art without the bypass pipe 40. In addition, the water tank 1 is arranged downstream of the heat exchanger 20, and the water tank 1 is divided into an energy storage mixing cavity and a drainage cavity 4, and the energy storage mixing cavity is located between the outlet of the heat exchanger 20 and the bypass pipe 40. Therefore, the energy storage mixing cavity is equivalent to an energy storage expansion unit of the heat exchanger 20, so that the heat exchanger 20 and the energy storage mixing cavity can store more high-temperature water. During the starting to normal heating process of the burner, the opening of the control valve 401 of the bypass pipe 40 can be adjusted to be small or closed in a delayed manner, so that the water flow in the water inlet pipe 30 flowing to the heat exchanger 20 is increased, and the high-temperature water heat energy stored in the heat exchanger 20 and the energy storage mixing cavity is released, thereby effectively reducing the water temperature drop during the water stop which has not been heated in time when the water heater is started, until the gas water heater is stably and normally heated.

[0056] Further, by arranging the drainage pipe 60, and the inlet end of the drainage pipe 60 is located in the drainage cavity 4, and the outlet end of the drainage pipe 60 is communicated with the water outlet 51, the passing stroke and the tortuosity of the water flow in the drainage cavity 4 can be increased, and the turbulent mixing effect of the water flow in the drainage cavity 4 can be strengthened.

[0057] Further, in one of the embodiments, the part of the water inlet pipe 30 upstream of the interface of the bypass pipe 40 is provided with a water inlet temperature sensor 301 and a flow sensor 302. The water inlet temperature sensor 301 can obtain the water temperature entering the water inlet pipe 30, and the flow sensor 302 can obtain the water flow entering the water inlet pipe 30, so as to determine whether the water is stopped, and control the water heater to be closed when the water is stopped.

[0058] Specifically, the water inlet end of the energy storage cavity 2 of the water tank is communicated with the water outlet end of the heat exchanger 20 through the first water outlet section 501, and the heat exchanger outlet temperature sensor 5011 is arranged on the first water outlet section 501. The heat exchanger outlet temperature sensor 5011 can obtain the outlet water temperature of the heat exchanger 20, that is, the inlet water temperature of the energy storage cavity 2.

[0059] The water outlet end of the drain pipe 60 of the water tank is communicated with the water outlet end of the water heater through a second water outlet section 502, and the second water outlet section 502 is provided with a water tank water outlet temperature sensor 5021, which can obtain the temperature of the water discharged from the drain pipe 60, that is, the outlet water temperature of the water heater.

[0060] Further, in one of the embodiments, the gas water heater further comprises a main controller (not shown in the figure), the control valve 401, the inlet water temperature sensor 301, the heat exchanger water outlet temperature sensor 5011 and the water tank water outlet temperature sensor 5021 are all communicated with the main controller through wired or wireless communication, and the main controller can include a chip with the ability of storing, calculating, signal output receiving, etc., so that the main controller can adjust the water flow of the bypass pipe 40 by controlling the control valve 401 when the actual outlet water temperature of the water heater changes, so as to adjust the bypass ratio of the water heater, and then adjust the actual outlet water temperature of the gas water heater, so that the stability of the actual outlet water temperature of the water heater is better.

[0061] In one of the embodiments, referring to Figure 4 , along the gravity direction, the energy storage mixing cavity is located above the drain cavity 4.

[0062] When the water tank 1 is used, its use direction is Figure 4 the gravity direction as shown, so that during the use of the gas water heater, the energy storage mixing cavity receives the hot water output by the heat exchanger 20, and the newly entered hot water in the energy storage mixing cavity can press part of the original hot water in the energy storage mixing cavity downward, and the water in the energy storage mixing cavity as a whole also has a downward flow trend, and the drain cavity 4 is located below the energy storage mixing cavity along the gravity direction, and the relative positions of the two meet the natural law, so that the water in the energy storage mixing cavity can flow smoothly and quickly into the drain cavity 4.

[0063] In one of the embodiments, along the gravity direction, the first inlet 11 is located above the second inlet 31.

[0064] The hot water from the heat exchanger 20 enters the energy storage mixing chamber from the first water inlet 11, and the cold water from the bypass pipe 40 flows into the energy storage mixing chamber from the second water inlet 31. Since liquid water has the characteristic that the higher the temperature, the lower the density, the hot water output from the heat exchanger 20 of the gas water heater is easy to float to the top of the inner cavity of the water tank 1 in the vertical direction, and the cold water transported into the energy storage mixing chamber 3 from the bypass pipe 40 is easy to sink to the bottom of the energy storage mixing chamber, and the hot water newly entering the energy storage mixing chamber can press some of the original hot water in the energy storage mixing chamber downward. In this way, the flow of hot water and cold water is more in line with the laws of nature, and warm water can still be formed by mixing in the energy storage mixing chamber, and the warm water enters the drain chamber 4 through the turbulence structure 6.

[0065] In one embodiment, referring to Figure 4 and Figure 5 , the water tank 1 further comprises a slow-flow structure 7, the slow-flow structure 7 separates the energy storage mixing chamber into an energy storage chamber 2 and a mixing chamber 3, the energy storage chamber 2 and the mixing chamber 3 are in communication through the slow-flow structure 7, the first water inlet 11 is located on the side wall of the energy storage chamber 2, and the second water inlet 31 and the water outlet 51 are located on the side wall of the mixing chamber 3.

[0066] Preferably, the first water inlet 11 is located on the top side wall of the energy storage chamber 2, and the second water inlet 31 and the water outlet 51 are located on the circumferential side wall of the mixing chamber 3.

[0067] In one embodiment, the energy storage chamber 2 and the mixing chamber 3 are arranged in sequence from top to bottom along the direction of gravity, and the energy storage chamber 2 is located above the mixing chamber 3. The first water inlet 11 is located on the upper side wall of the energy storage chamber 2, and the second water inlet 31 and the water outlet 51 are located on the circumferential side wall of the mixing chamber 3. When the water tank 1 is used, the direction of use is Figure 4 the direction of gravity as shown in the figure, so that during use of the gas water heater, the energy storage chamber 2 receives the hot water output from the heat exchanger 20, and the newly entered hot water in the energy storage chamber 2 can push some of the original hot water in the energy storage chamber 2 into the mixing chamber 3 below, and the water in the mixing chamber 3 as a whole also has a tendency to flow downward. The drain chamber 4 is located below the mixing chamber 3 along the direction of gravity, and the relative positions of the two conform to the laws of nature, so that the mixing effect of the cold water and the hot water in the mixing chamber 3 is more uniform and reliable, Figure 3 the figure shows the up-down direction of the water tank 1 in use along the vertical direction.

[0068] Of course, in other embodiments, the energy storage chamber 2 and the mixing chamber 3 can also be arranged along the horizontal direction, and at this time the first partition plate located at the boundary between the energy storage chamber 2 and the mixing chamber 3 can fully guarantee the energy storage effect of the energy storage chamber 2. The arrangement of the first partition plate makes the arrangement of the energy storage chamber 2 and the mixing chamber 3 more flexible, so as to be applicable to more different internal space conditions of the water heater.

[0069] Of course, in other embodiments, the drainage cavity 4 can also be arranged horizontally with the mixing cavity 3. The arrangement of the second partition plate makes the arrangement of the drainage cavity 4 and the mixing cavity 3 more flexible, so as to be applicable to more different internal space conditions of the water heater.

[0070] It can be understood that, since liquid water has the characteristic that the higher the temperature, the lower the density, in some embodiments, the first partition plate can not be provided, and only the second partition plate is provided. In use, the water tank 1 is arranged from top to bottom in the vertical direction, that is, the energy storage cavity 2 is located at the top end of the water tank, the mixing cavity 3 is located in the middle section, and the drainage cavity 4 is located at the bottom end. The hot water output from the heat exchanger of the water heater is easy to float to the top of the inner cavity of the water tank 1 in the vertical direction, and the cold water transported from the cold water pipe into the mixing cavity 3 is easy to sink to the bottom of the mixing cavity 3. In this way, the hot water and the cold water can still be mixed in the mixing cavity 3 to form warm water, and the warm water enters the drainage cavity 4 through the second through hole 61 of the second partition plate.

[0071] Specifically, in the embodiment, when the gas water heater is normally working, the hot water flows out from the water outlet end of the heat exchanger 20 in the energy storage cavity 2, the water temperature in the energy storage cavity 2 is the water outlet temperature of the heat exchanger 20, the water outlet temperature of the heat exchanger 20 is higher than the set water outlet temperature set by the user, the water inlet pipe 30 of the water heater inputs cold water into the mixing cavity 3 through the bypass pipe 40, the cold water and the hot water are fully mixed in the mixing cavity 3 to form warm water with the same temperature as the set water outlet temperature, and the warm water enters the drainage cavity 4 and finally flows out through the drainage pipe 60 and the water outlet end of the water heater for use by the user.

[0072] When the water heater is temporarily stopped working, the hot water with a temperature higher than the set water outlet temperature flows out from the water outlet end of the heat exchanger 20 and is stored in the energy storage cavity 2. Since the heat exchanger 20 has a high residual heat, the temperature of the hot water flowing out from the water outlet end of the heat exchanger 20 during the temporary stop working is higher than the temperature of the hot water flowing out from the water outlet end of the heat exchanger 20 when the water heater is normally working. When the water heater is started for the second time within a preset time, the cold water not heated yet flows out from the water outlet end of the heat exchanger 20 of the water heater and enters the energy storage cavity 2, the cold water mixes with the hot water in the energy storage cavity 2, and the overall water temperature in the energy storage cavity 2 decreases. At the same time when the water heater is started for the second time, the flow of the cold water input into the mixing cavity 3 through the bypass pipe 40 is reduced, so as to reduce the water temperature drop of the hot water mixed with the cold water in the mixing cavity 3 in the case that the overall water temperature in the energy storage cavity 2 decreases, to make the water temperature flowing into the drainage cavity 4 from the mixing cavity 3 more stable, and thus to make the water outlet temperature of the water outlet end of the water heater constant, while avoiding that the water heater flows out a section of hot water higher than the set water outlet temperature when started for the second time, to ensure the user experience.

[0073] Since the water inlet end of the drain pipe 60 is located in the drain cavity 4, the pipe body of the drain pipe 60 passes through the mixing cavity 3 via the drain cavity 4 and the water outlet end of the drain pipe 60 passes out through the side wall of the water tank 1, so that the drain pipe 60 plays a role of turbulence in the mixing cavity 3, ensuring that the cold water and the hot water are more fully mixed in the mixing cavity 3 to form the warm water with the same temperature as the set water temperature of the user, and ensuring that the water temperature of the water heater is uniform. At the same time, the setting of the drain pipe 60 prolongs the mixing path length and the mixing time of the water flowing out of the drain cavity 4, so that the water temperature of the water heater is more uniform.

[0074] Optionally, in some embodiments, the water outlet end of the drain pipe 60 passes through the side wall of the mixing cavity 3; or,

[0075] The water outlet end of the drain pipe 60 passes through the side wall of the energy storage cavity 2.

[0076] Specifically, in the embodiment, the water outlet end of the drain pipe 60 passes through the side wall of the mixing cavity 3, so that the pipe body of the drain pipe 60 passes through the mixing cavity 3 from the drain cavity 4 and plays a role of turbulence in the mixing cavity 3, ensuring that the cold water and the hot water are more fully mixed in the mixing cavity 3, and ensuring that the water temperature of the water heater is uniform.

[0077] Of course, in other embodiments, the water outlet end of the drain pipe 60 can also pass through the side wall of the energy storage cavity 2; that is, the pipe body of the drain pipe 60 is distributed in the energy storage cavity 2, the mixing cavity 3 and the drain cavity 4. The water inlet end of the drain pipe 60 is located in the drain cavity 4 for pumping the water in the drain cavity 4 into the drain pipe 60; the part of the drain pipe 60 located in the mixing cavity 3 can disturb the flow of water in the mixing cavity 3, ensuring that the cold water and the hot water are more fully mixed in the mixing cavity 3; the part of the drain pipe 60 located in the energy storage cavity 2 can further exchange heat with the hot water in the energy storage cavity 2, further ensuring that the water temperature is uniform and constant. Compared with the water outlet end of the drain pipe 60 passing through the side wall of the mixing cavity 3, the water outlet end of the drain pipe 60 passing through the side wall of the energy storage cavity 2, in this way, the length of the drain pipe 60 is longer, prolonging the mixing path length and the mixing time of the water flowing out of the drain cavity 4, so that the water temperature of the water heater is more uniform.

[0078] Referring to Figure 5 and Figure 6In one of the embodiments, the inlet end of the drain pipe 60 and the bottom wall of the drain cavity 4 form a water inlet opening 601, and the water inlet area of the water inlet opening 601 is 1-3 times the cross-sectional area of the nozzle of the drain pipe 60. In this way, on the one hand, the water flow in the drain cavity 4 is increased to improve the utilization rate of the drain cavity 4, so that the drain cavity 4 also has a certain mixing and turbulence effect; on the other hand, the inlet end of the drain pipe 60 is arranged as close as possible to the bottom wall of the drain cavity 4 while having a certain spacing between the inlet end of the drain pipe 60 and the bottom wall of the drain cavity 4, thereby avoiding the space occupied by the water tank 1 being too large.

[0079] Preferably, the water inlet area of the water inlet opening 601 is equal to the cross-sectional area of the nozzle of the drain pipe 60. In this way, the inlet end of the drain pipe 60 is arranged as close as possible to the bottom wall of the drain cavity 4, and the water at the water inlet opening 601 can flow into the drain pipe 60 continuously, quickly and stably.

[0080] Exemplarily, referring to Figure 6 , the distance between the lower surface of the inlet end of the drain pipe 60 and the bottom wall of the drain cavity 4 is h, and the water inlet area of the water inlet opening 601 is the product of the circumference of the cross-section of the drain pipe 60 and h.

[0081] Further, in one of the embodiments, referring to Figure 4 and Figure 5 , the flow slowing structure 7 is a first partition plate, and the first partition plate is provided with a first through hole 71 communicating the energy storage cavity 2 and the mixing cavity 3; and / or, the turbulence structure 6 is a second partition plate, and the second partition plate is provided with a second through hole 61 communicating the mixing cavity 3 and the drain cavity 4.

[0082] Preferably, in the present embodiment, the flow slowing structure 7 is a first partition plate, and the first partition plate is provided with a first through hole 71 communicating the energy storage cavity 2 and the mixing cavity 3; and the turbulence structure 6 is a second partition plate, and the second partition plate is provided with a second through hole 61 communicating the mixing cavity 3 and the drain cavity 4.

[0083] Referring to Figure 5 and Figure 6 , in one of the embodiments, the drain cavity 4 includes a main drain cavity 4 and a secondary drain cavity 42.

[0084] The outlet end of the energy storage and mixing cavity communicates with the inlet end of the main drain cavity 4.

[0085] The secondary drain cavity 42 is located downstream of the main drain cavity 4, the cross-sectional area of the secondary drain cavity 42 is smaller than that of the main drain cavity 4, the secondary drain cavity 42 communicates with the main drain cavity 4, and the inlet end of the drain pipe 60 is located in the secondary drain cavity 42.

[0086] The sub-drainage cavity 42 is located downstream of the main drainage cavity 4 and has a smaller cross-sectional area than the main drainage cavity 4, so that the sub-drainage cavity 42 serves to concentrate the water flow, and the water inlet end of the drain pipe 60 is located in the sub-drainage cavity 42, so that the flow rate of the water inlet end of the drain pipe 60 can fully meet the use requirements.

[0087] Preferably, referring to Figure 6 , the sub-drainage cavity 42 is arranged below the central position of the main drainage cavity 4, so that the water flow in the main drainage cavity 4 can quickly converge into the sub-drainage cavity 42 under the action of gravity.

[0088] In one embodiment, the bottom surface of the main drainage cavity 4 is arranged downwardly inclined relative to the sub-drainage cavity 42, so that the water flow in the main drainage cavity 4 quickly converges into the sub-drainage cavity 42 along the bottom wall of the main drainage cavity 4 under the action of gravity.

[0089] The first and second partitions are arranged in relative spacing, the first partition and part of the inner wall of the water tank 1 surround to form the energy storage cavity 2; the first and second partitions and part of the inner wall of the water tank 1 surround to form the mixing cavity 3; the second partition and part of the inner wall of the water tank 1 surround to form the drainage cavity 4.

[0090] The first partition is arranged in the water tank 1 and located at the boundary between the energy storage cavity 2 and the mixing cavity 3, and the first partition is provided with a first through hole 71 communicating the energy storage cavity 2 and the mixing cavity 3, so that the first partition can reduce the possibility of the hot water in the energy storage cavity 2 directly mixing with the water in the mixing cavity 3, so that the heat carried by the hot water output from the heat exchanger 20 can stay in the energy storage cavity 2 for a period of time, so that the energy storage effect of the energy storage cavity 2 is better. And the first through hole 71 forms a narrowing structure, and the hot water in the energy storage cavity 2 accelerates when passing through the first through hole 71 due to the reduced flow path, so that the hot water in the energy storage cavity 2 can enter the mixing cavity 3 at a faster speed, and is more easily mixed with cold water in the mixing cavity 3.

[0091] Specifically, taking the orientation shown in Figure 5 as an example, the distance between the second partition and the bottom wall of the main drainage cavity 4 gradually increases in the direction close to the sub-drainage cavity 42, on the one hand, so that there is a certain space in the drainage cavity 4 when the warm water flows into the drainage cavity 4, and on the other hand, so that the water flow in the main drainage cavity 4 quickly converges into the sub-drainage cavity 42 along the bottom wall of the main drainage cavity 4 under the action of gravity.

[0092] Further optionally, a plurality of first through holes 71 are arranged on the first partition, and the plurality of first through holes 71 are arranged in a circumferential direction around the center of the first partition.

[0093] Similarly, a second partition is arranged in the water tank 1 at the boundary between the mixing chamber 3 and the drainage chamber 4, and the second partition is provided with a second through hole 61 for connecting the mixing chamber 3 and the drainage chamber 4. In this way, the warm water in the mixing chamber 3 can be accelerated when passing through the second through hole 61 into the drainage chamber 4 due to the reduced flow path, so that the warm water in the mixing chamber 3 can enter the drainage chamber 4 at a faster speed.

[0094] In one embodiment, referring to Figure 5 and Figure 6 , the water inlet end of the drainage pipe 60 is located at the center of the drainage chamber 4. The bottom surface of the main drainage chamber 4 is arranged at an angle with the second partition. Along the flow direction of the fluid towards the water inlet end of the drainage pipe 60, the distance between the bottom surface of the main drainage chamber 4 and the second partition gradually increases. In this way, the warm water in the drainage chamber 4 can be quickly gathered to the water inlet end of the drainage pipe 60.

[0095] Specifically, the lower surface of the water tank 1 is in the shape of an inverted circular truncated cone, and a hollow oblate cylinder with an open upper end is arranged at the lower end of the inverted circular truncated cone to form a sub-drainage chamber 42, and the water inlet end of the drainage pipe 60 is located in the cavity of the hollow oblate cylinder.

[0096] Specifically, the inner wall of the inverted circular truncated cone and the lower surface of the second partition form the main drainage chamber 4, and the inner wall of the hollow oblate cylinder forms the sub-drainage chamber 42.

[0097] Preferably, the area of the second partition is smaller than the diameter of the largest cross section of the inverted circular truncated cone. In this way, the volume of the drainage chamber 4 is as small as possible, and enough space is reserved for the energy storage chamber 2 and the mixing chamber 3.

[0098] Further, in one embodiment, the volume of the drainage chamber 4 is smaller than the volume of the mixing chamber 3; and / or

[0099] The volume of the energy storage chamber 2 is greater than half of the total volume of the water tank 1.

[0100] The volume of the drainage chamber 4 is smaller than the volume of the mixing chamber 3, and the volume of the mixing chamber 3 is large enough to ensure the mixing of cold water and hot water.

[0101] The volume of the energy storage chamber 2 is greater than half of the total volume of the water tank 1. The greater the volume of the energy storage chamber 2, the more heat energy it can store, and the better the constant temperature effect.

[0102] Specifically, in this embodiment, the volume of the drainage chamber 4 is smaller than the volume of the mixing chamber 3, and the volume of the energy storage chamber 2 is greater than half of the total volume of the water tank 1.

[0103] Embodiment two

[0104] The embodiment provides a gas water heater, which has constant water outlet temperature at secondary starting. Wherein, same or corresponding components of the embodiment one adopt same reference numerals.

[0105] For the sake of simplicity, only the difference between the embodiment two and the embodiment one is described. The difference is that, referring to Figures 7-10 , the inlet end of the drain pipe 60 abuts against the bottom wall of the drain cavity 4, and the side wall of the inlet end of the drain pipe 60 is provided with a third water inlet 831, and the area of the third water inlet 831 is 1-3 times of the cross-sectional area of the pipe opening of the drain pipe 60, as shown in Figure 8 and Figure 9 , the third water inlet 831 is a rectangular opening on the side wall of the drain pipe 60, and the water inlet area thereof can be obtained by simply multiplying the lengths of two adjacent sides, and the horizontal length of the rectangular opening needs to consider the outer peripheral arc surface of the introduction pipe 83, that is, the horizontal arc length of the rectangular opening needs to be measured and calculated, of course, if the third water inlet pipe is of other shapes, the water inlet area also needs to be adaptively changed to obtain the calculation method according to the actual situation.

[0106] The drain pipe 60 adopting the above structure can play the role of flow disturbance and mixing while improving the space utilization rate of the drain cavity 4, so that the cold water and hot water are more uniformly mixed. And the drain pipe 60 adopting the above structure increases the water flow distance in the drain cavity 4, so that the cold water and hot water entering the drain pipe 60 can be further mixed uniformly.

[0107] Preferably, the area of the third water inlet 831 is equal to the cross-sectional area of the pipe opening of the drain pipe 60. In this way, the opening of the inlet end of the drain pipe 60 is avoided to be too large to affect the structural strength of the drain pipe 60.

[0108] Specifically, referring to Figure 9 , the calculation method of the area of the third water inlet 831 is that the third water inlet 831 is arc-shaped, and the arc is unfolded into a rectangle, and the length of the rectangle multiplied by the width of the rectangle is the area of the third water inlet 831.

[0109] Further, in one of the embodiments, referring to Figure 10 , the drain pipe 60 comprises a partition 84 and an introduction pipe 83, the partition 84 is covered on the flow disturbance structure 6 to form a drain passage 82, the introduction pipe 83 is connected with the flow disturbance structure 6, the water inlet end of the drain pipe 60 is the free end of the introduction pipe 83, one end of the drain passage 82 is communicated with the water outlet 51, and the other end of the drain passage 82 is communicated with the introduction pipe 83.

[0110] The pipeline of the introduction pipe 83 is an introduction flow channel 81, and the water in the drain cavity 4 enters the drain passage 82 through the introduction flow channel 81.

[0111] Compared with the regular tubular structure, the water drainage channel 82 is covered by the partition 84, which can destroy the consistency of the inner wall of the water drainage channel 82, increase the flow distance of the water in the water drainage channel 82, and make the water flow in the water drainage channel 82 be disturbed by the inner wall of the water drainage channel 82, thereby further enhancing the uniformity of the water flow mixing in the water drainage channel 82.

[0112] Further specifically, in one embodiment, the partition 84 and the introduction pipe 83 are respectively located at two sides of the turbulence structure 6, the partition 84 is located in the energy storage mixing chamber, and the introduction pipe 83 is located in the water drainage chamber 4. This structure is convenient for manufacturing.

[0113] The partition 84 extends in a straight line and has an arc-shaped cross section, and the partition 84 and the upper surface of the second partition plate surround to form the water drainage channel 82. Correspondingly, a pipe joint is arranged on the outer side wall of the water tank 1 and communicates with the water outlet end of the water drainage channel 82.

[0114] Of course, in other embodiments, the partition 84 can be bent, and a part of the partition 84 is located in the water drainage chamber 4, and the other part of the partition 84 passes through the turbulence structure 6 and communicates with the water outlet 51. That is, a part of the partition 84 is located on the lower surface of the turbulence structure 6, and the other part of the partition 84 is located on the upper surface of the turbulence structure 6. In this way, the consistency of the inner wall of the water drainage channel 82 can be further destroyed, the flow distance of the water in the water drainage channel 82 can be increased, and the water flow in the water drainage channel 82 can be further disturbed by the inner wall of the water drainage channel 82, thereby further enhancing the uniformity of the water flow mixing in the water drainage channel 82.

[0115] In the normal working state of the gas water heater provided in the embodiment, the energy storage chamber 2 is filled with hot water flowing out of the water outlet end of the heat exchanger 20, the water temperature in the energy storage chamber 2 is the water outlet temperature of the heat exchanger 20, the water outlet temperature of the heat exchanger 20 is higher than the set water outlet temperature set by the user, the water inlet pipe of the water heater communicates with the mixing chamber 3 and inputs cold water into the mixing chamber 3, the cold water and the hot water are fully mixed in the mixing chamber 3 to form water with the same temperature as the set water outlet temperature, the water enters the water drainage chamber 4, and finally flows out of the water outlet end of the water heater via the pipe joint and the water outlet end of the water heater for the user to use.

[0116] When the water heater is temporarily stopped, the hot water with a temperature higher than the set water outlet temperature flows out of the outlet end of the heat exchanger 20 and is stored in the energy storage cavity 2. Due to the high residual heat of the heat exchanger 20, the temperature of the hot water flowing out of the outlet end of the heat exchanger 20 during the temporary stop is higher than that during the normal operation of the water heater. When the water heater is started again within the preset time, the cold water flowing out of the outlet end of the heat exchanger 20 is mixed with the hot water in the energy storage cavity 2, so that the overall water temperature in the energy storage cavity 2 decreases. At the same time of the second start of the water heater, the cold water flow rate delivered by the water inlet pipe 30 into the mixing cavity 3 is reduced, so as to reduce the temperature drop of the mixed water in the energy storage cavity 2, stabilize the water temperature flowing into the drain cavity 4 from the mixing cavity 3, and keep the water outlet temperature of the water heater constant, while avoiding the water heater flowing out of hot water with a temperature higher than the set water outlet temperature during the second start, and ensuring the user experience.

[0117] Since the partition 84 is located in the mixing cavity 3, the partition 84 can play a role of flow disturbance in the mixing cavity 3, so as to ensure that the cold water and the hot water are more fully mixed in the mixing cavity 3 to form warm water with the same temperature as the set water outlet temperature of the user, and ensure the uniform water outlet temperature of the water heater. At the same time, the introduction of the pipe 83 and the partition 84 prolongs the mixed path length and the mixing time of the water flowing out of the drain cavity 4, so as to make the water outlet temperature of the water heater more uniform.

[0118] Embodiment Three

[0119] The embodiment provides a gas water heater control method for controlling the water heater of the embodiment one or the embodiment two.

[0120] Specifically, the water heater control method comprises the following steps.

[0121] Based on the boiling water request, it is judged whether the interval time between the current time and the last water stop time is less than the preset time.

[0122] If the interval time is less than the preset time, the opening degree of the control valve 401 is controlled to be reduced.

[0123] Specifically, if the interval time is less than the preset time, it is determined that the water heater is started again, and at this time, the opening degree of the control valve 401 is controlled to be reduced. Specifically, compared with the opening degree of the control valve 401 during the normal operation of the water heater, the opening degree of the control valve 401 is reduced during the second start of the water heater.

[0124] The water heater control method provided by the embodiment can reduce the flow of cold water delivered into the energy storage mixing chamber when the water heater is started twice within the preset time, so as to reduce the temperature drop range of the mixed water in the energy storage mixing chamber when the overall water temperature in the energy storage mixing chamber drops after the hot water and the cold water are mixed, so that the water temperature delivered from the energy storage mixing chamber into the drain chamber 4 is more stable, and the temperature fluctuation range of the water output by the water heater is further reduced.

[0125] In the specific contents of the above specific embodiments, any non-contradictory combination of technical features can be made, and in order to make the description simple, all possible combinations of the above technical features are not described, however, as long as the combination of the technical features does not exist Contradiction, it should be considered as the scope disclosed in the description.

[0126] The specific contents of the above specific embodiments only express several embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the utility model. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A gas water heater comprising a burner and a water inlet pipe (30), a heat exchanger (20) and a water outlet pipe (50) connected in sequence, the burner being capable of supplying heat to the heat exchanger (20), the water inlet pipe (30) being provided with a flow sensor (302), characterized in that, The water outlet pipe (50) comprises a first water outlet section (501) and a second water outlet section (502), the inlet end of the first water outlet section (501) is communicated with the outlet end of the heat exchanger (20), and the gas water heater further comprises: A water tank (1) has a first water inlet (11), a second water inlet (31) and a water outlet (51), a turbulence structure (6) is arranged in the water tank (1), the turbulence structure (6) separates the inner cavity of the water tank (1) into an energy storage and mixing cavity and a drainage cavity (4), the energy storage and mixing cavity and the drainage cavity (4) are communicated through the turbulence structure (6), the first water inlet (11) and the second water inlet (31) are located on the side wall of the energy storage and mixing cavity, the water outlet (51) is located on the side wall of the energy storage and mixing cavity, the outlet end of the first water outlet section (501) is communicated with the first water inlet (11), and the inlet end of the second water outlet section (502) is communicated with the water outlet (51); A bypass pipe (40) is communicated with the water inlet pipe (30) at one end and communicated with the second water inlet (31) at the other end, and the bypass pipe (40) is provided with a control valve (401); A drainage pipe (60) has an inlet end located in the drainage cavity (4), and an outlet end communicated with the water outlet (51).

2. The gas water heater of claim 1, wherein, Further comprising a flow slowing structure (7), the flow slowing structure (7) separates the energy storage and mixing cavity into an energy storage cavity (2) and a mixing cavity (3), the energy storage cavity (2) and the mixing cavity (3) are communicated through the flow slowing structure (7), the first water inlet (11) is located on the side wall of the energy storage cavity (2), and the second water inlet (31) and the water outlet (51) are located on the side wall of the mixing cavity (3).

3. The gas water heater according to claim 1 or 2, wherein The inlet end of the drainage pipe (60) and the bottom wall of the drainage cavity (4) form a water inlet opening (601), and the water inlet area of the water inlet opening (601) is 1-3 times the cross-sectional area of the pipe opening of the drainage pipe (60).

4. The gas water heater of claim 2, wherein, The flow slowing structure (7) is a first partition plate, the first partition plate is provided with a first through hole (71) communicated between the energy storage cavity (2) and the mixing cavity (3); and / or the turbulence structure (6) is a second partition plate, the second partition plate is provided with a second through hole (61) communicated between the mixing cavity (3) and the drainage cavity (4).

5. The gas water heater of claim 1, wherein, The drainage cavity (4) comprises: A main drainage cavity (41), the outlet end of the energy storage and mixing cavity is communicated with the inlet end of the main drainage cavity (41); A secondary drainage cavity (42) is located downstream of the main drainage cavity (41), the cross-sectional area of the secondary drainage cavity (42) is smaller than that of the main drainage cavity (41), the secondary drainage cavity (42) is communicated with the main drainage cavity (41), and the inlet end of the drainage pipe (60) is located in the secondary drainage cavity (42).

6. The gas water heater of claim 1, wherein, The inlet end of the drain pipe (60) abuts against the bottom wall of the drain cavity (4), and the side wall of the inlet end of the drain pipe (60) is provided with a third water inlet (831), and the area of the third water inlet (831) is 1-3 times the cross-sectional area of the pipe opening of the drain pipe (60).

7. The gas water heater of claim 1, wherein, The drain pipe (60) comprises a partition (84) and an introduction pipe (83), the partition (84) covers the spoiler structure (6) to form a drain passage (82), the introduction pipe (83) is connected with the spoiler structure (6), the water inlet end of the drain pipe (60) is the free end of the introduction pipe (83), one end of the drain passage (82) communicates with the water outlet (51), and the other end of the drain passage (82) communicates with the introduction pipe (83).

8. The gas water heater of claim 7, wherein, The partition (84) and the introduction pipe (83) are respectively located on both sides of the spoiler structure (6), the partition (84) is located in the energy storage mixing cavity, and the introduction pipe (83) is located in the drain cavity (4).

9. The gas water heater according to any one of claims 1, 2, 4-8, wherein, In the direction of gravity, the energy storage mixing cavity is located above the drain cavity (4).

10. The gas water heater according to any one of claims 1, 2, 4-8, wherein, In the direction of gravity, the first water inlet (11) is located above the second water inlet (31).

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