Hot water constant temperature device and gas water heater equipment

Abstract

The utility model discloses a hot water constant temperature device and gas hot water equipment. The hot water constant temperature device comprises a water storage tank, the water storage tank comprises a tank body and a diaphragm arranged in the tank body, the diaphragm divides the interior of the tank body into a first containing cavity and a second containing cavity, a first water through hole, a second water through hole and a third water through hole are formed in the tank body, the first water through hole and the second water through hole are communicated with the first containing cavity, and the third water through hole is communicated with the second containing cavity. The third water through hole is communicated with the second accommodating cavity; the three-way valve comprises a first connector, a second connector and a third connector, and the first water through hole is connected with the second connector; the first end of the first hot water pipe is connected with the first connector, and the second end is connected with the hot water outlet end of the gas water heater; the first end of the second hot water pipe is connected with the hot water using point, the second end is connected with the third connector, and the third limber hole is connected with the second hot water pipe; the first end of the cold water pipe is connected with a water supply pipeline outside the gas water heater, and the second end of the cold water pipe is connected with the cold water inlet end of the gas water heater.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a hot water constant temperature device and a gas water heater device. Background Art

[0002] With the improvement of living standards, people's requirements for domestic hot water are also gradually increasing. Before starting a gas water heating device (gas wall-mounted boiler or gas water heater), there is a purging and ignition safety time. Therefore, during the use of domestic hot water, when the domestic hot water is briefly closed and then reopened, a section of cold water will flow out, resulting in a sudden drop in water temperature and affecting the user experience. Currently, some manufacturers in the industry add a tank at the hot water outlet to buffer this section of cold water and reduce the adverse experience brought by temperature fluctuations. However, this method cannot completely avoid that there is still a section of cold water with a sudden drop in water temperature and still cannot meet the requirements of users with high demands.

[0003] Therefore, there is an urgent need for a hot water constant temperature device to solve the above problems. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the problems existing in the related art to a certain extent. For this purpose, the utility model provides a hot water constant temperature device with a simple structure, which can store hot water in the second accommodation cavity of the water storage tank when the faucet at the hot water usage point is briefly closed, and then when the faucet at the hot water usage point is reopened, the cold water at the start of the gas water heater enters the first accommodation cavity of the water storage tank, and at the same time, the hot water in the second accommodation cavity of the water storage tank is discharged to the hot water usage point. When the hot water in the second accommodation cavity of the water storage tank is drained, the hot water of the gas water heater starts to flow to the hot water usage point, realizing continuous hot water outflow, thereby avoiding the problem of sudden drop in water temperature.

[0005] The above object is achieved by the following technical solutions:

[0006] A hot water constant temperature device, comprising:

[0007] A water storage tank, including a tank body and a diaphragm arranged in the tank body, the diaphragm divides the interior of the tank body into a first accommodation cavity and a second accommodation cavity, the tank body is provided with a first water passing hole, a second water passing hole and a third water passing hole, the first water passing hole and the second water passing hole are communicated with the first accommodation cavity, and the third water passing hole is communicated with the second accommodation cavity;

[0008] A three-way valve, including a first interface, a second interface and a third interface, the first water passing hole is connected to the second interface;

[0009] A first hot water pipe, the first end of which is connected to the first interface, and the second end is connected to the hot water outlet end of the gas water heater;

[0010] A second hot water pipe, with its first end connected to a hot water usage point and its second end connected to the third interface, and the third water passage hole is connected to the second hot water pipe;

[0011] A cold water pipe, with its first end connected to a water supply pipeline outside the gas water heater and its second end connected to the cold water inlet end of the gas water heater;

[0012] A circulation water pump, installed on the cold water pipe;

[0013] A check valve, installed between the second water passage hole and the circulation water pump.

[0014] Optionally, it further includes a water pressure sensor, and the water pressure sensor is installed between the first hot water pipe and the first water passage hole or installed between the second water passage hole and the cold water pipe.

[0015] Optionally, it further includes a water flow sensor, the water flow sensor is installed on the second hot water pipe, a part of the second hot water pipe located between the water flow sensor and the third interface is a first connection part, and the third water passage hole is connected to the first connection part.

[0016] Optionally, the first accommodation cavity is located above the second accommodation cavity.

[0017] Optionally, it includes an electronic control board, and the check valve, the circulation water pump and the three-way valve are all communicatively connected to the electronic control board.

[0018] Optionally, the check valve is a check valve.

[0019] Optionally, it further includes a housing, the water storage tank, the three-way valve, the circulation water pump and the check valve are all installed inside the housing, the second end of the first hot water pipe extends out of the upper side of the housing, the first end of the second hot water pipe extends out of the lower side of the housing, the cold water pipe includes an inlet part and an outlet part connected to each other, the inlet part extends out of the lower side of the housing and is connected to the water supply pipeline, and the outlet part extends out of the upper side of the housing and is connected to the cold water inlet end of the gas water heater.

[0020] On the other hand, the present utility model provides a gas water heater device, including a gas water heater and the above-mentioned hot water constant temperature device.

[0021] Compared with the prior art, the present utility model at least includes the following beneficial effects:

[0022] The hot water constant temperature device provided by the utility model has a simple structure, and can store hot water in the second accommodating cavity of the water storage tank when the faucet at the hot water usage point is briefly closed. Then, when the faucet at the hot water usage point is opened again, the cold water at the start of the gas water heater enters the first accommodating cavity of the water storage tank, and at the same time, the hot water in the second accommodating cavity of the water storage tank is discharged to the hot water usage point. When the hot water in the second accommodating cavity of the water storage tank is drained, the hot water of the gas water heater starts to flow to the hot water usage point, realizing continuous hot water outflow, thereby avoiding the problem of sudden temperature drop of the water temperature. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the hot water constant temperature device provided by a specific embodiment of the utility model;

[0024] Figure 2 is a schematic diagram of the first operating state of the hot water constant temperature device provided by a specific embodiment of the utility model;

[0025] Figure 3 is a schematic diagram of the second operating state of the hot water constant temperature device provided by a specific embodiment of the utility model;

[0026] Figure 4 is a schematic diagram of the third operating state of the hot water constant temperature device provided by a specific embodiment of the utility model;

[0027] Figure 5 is a schematic diagram of the fourth operating state of the hot water constant temperature device provided by a specific embodiment of the utility model;

[0028] Figure 6 is a step diagram of the control method of the hot water constant temperature device provided by a specific embodiment of the utility model.

[0029] In the figure:

[0030] 1. Water storage tank; 10. Diaphragm; 11. Tank body; 12. First water passing hole; 13. Second water passing hole; 14. Third water passing hole;

[0031] 2. Outer shell;

[0032] 3. Three-way valve; 301. First interface; 302. Second interface; 303. Third interface;

[0033] 31. First hot water pipe; 32. Outlet part; 33. Second hot water pipe; 34. Inlet part;

[0034] 4. Water pressure sensor;

[0035] 5. Water flow sensor;

[0036] 6. Circulation water pump;

[0037] 7. Check valve;

[0038] 8. Electric control board;

[0039] 101. First accommodation cavity; 102. Second accommodation cavity. Specific embodiments

[0040] The following embodiments are used to illustrate the present invention, but the present invention is not limited by these embodiments. Modifying the specific embodiments of the present invention or making equivalent replacements for some technical features without departing from the spirit of the present invention scheme shall all be covered within the scope of the technical solution claimed by the present invention.

[0041] Please refer to Figure 1 , the present invention provides a hot water constant temperature device, including a water storage tank 1, a three-way valve 3, a first hot water pipe 31, a second hot water pipe 33, a cold water pipe and a circulation pump 6. The water storage tank 1 includes a tank body 11 and a diaphragm 10 arranged inside the tank body 11. The diaphragm 10 divides the interior of the tank body 11 into a first accommodation cavity 101 and a second accommodation cavity 102. The tank body 11 is provided with a first water passing hole 12, a second water passing hole 13 and a third water passing hole 14. The first water passing hole 12 and the second water passing hole 13 communicate with the first accommodation cavity 101, and the third water passing hole 14 communicates with the second accommodation cavity 102. The three-way valve 3 includes a first interface 301, a second interface 302 and a third interface 303. The first water passing hole 12 is connected to the second interface 302. The first end of the first hot water pipe 31 is connected to the first interface 301, and the second end is connected to the hot water outlet end of the gas water heater. The first end of the second hot water pipe 33 is connected to the hot water usage point, and the second end is connected to the third interface 303. The third water passing hole 14 is connected to the second hot water pipe 33. The first end of the cold water pipe is connected to the water supply pipeline outside the gas water heater, and the second end is connected to the cold water inlet end of the gas water heater. The circulation pump 6 is installed on the cold water pipe. A one-way valve 7 is installed between the second water passing hole 13 and the circulation pump 6. The one-way valve 7 is in an open state all the time. The one-way valve 7 enables the water flow to only flow from the second water passing hole 13 to the cold water pipe, and cannot flow from the cold water pipe to the second water passing hole 13 and then enter the first accommodation cavity 101. Specifically, in the standby state of the hot water constant temperature device, the first interface 301 and the second interface 302 of the three-way valve 3 are default to be in an open state, and the third interface 303 of the three-way valve 3 is default to be in a closed state. As Figure 2 shown, when the faucet at the hot water usage point is opened, the water flow flows out from the second accommodation cavity 102 of the tank body 11 through the third water passing hole 14 to the second hot water pipe 33, and then flows to the hot water usage point. At the same time, the tap water in the water supply pipeline enters the gas water heater through the cold water pipe and the circulation pump 6 for heating. The cold water in the pipeline of the gas water heater then flows from the first hot water pipe 31 through the first interface 301 and the second interface 302 of the three-way valve 3 to the first accommodation cavity 101 of the tank body 11. The water flow direction is along Figure 2 the arrow A direction inFigure 3 As shown, when the water in the second accommodating cavity 102 is drained, the first interface 301 and the third interface 303 of the three-way valve 3 are opened, and the second interface 302 is closed, so that the hot water heated by the gas water heater flows through the first interface 301, the third interface 303 and the second hot water pipe 33 to the hot water usage point, and the water flow direction is along Figure 3 the direction of arrow B in Figure 4 As shown, when the faucet at the hot water usage point is closed, the circulation pump 6 is started so that the cold water in the first accommodating cavity 101 can flow into the gas water heater through the circulation pump 6 for heating, and then flows into the second accommodating cavity 102 through the first interface 301, the third interface 303 and the third water passing hole 14. As Figure 5 shown, when the hot water in the second accommodating cavity 102 is full and the middle part of the diaphragm 10 is pushed to a preset position, the circulation pump 6 is turned off, and the hot water constant temperature device returns to the standby state, and the above steps are repeated, so that when the faucet at the hot water usage point is opened after a short stop, the hot water flows out of the second accommodating cavity 102, and the cold water generated during the restart of the gas water heater is stored in the first accommodating cavity 101, thereby avoiding the problem of sudden drop in water temperature when the faucet at the hot water usage point is briefly closed and then opened.

[0042] Optionally, it further includes a water pressure sensor 4. The water pressure sensor 4 is installed between the first hot water pipe 31 and the first water passing hole 12 or between the second water passing hole 13 and the cold water pipe. The water pressure between the first hot water pipe 31 and the first water passing hole 12 or between the second water passing hole 13 and the cold water pipe is detected by the water pressure sensor 4, so as to judge whether the middle part of the diaphragm 10 is pushed to the preset position.

[0043] Optionally, it further includes a water flow sensor 5. The water flow sensor 5 is installed on the second hot water pipe 33. The part of the second hot water pipe 33 between the water flow sensor 5 and the third interface 303 is the first connecting part, and the third water passing hole 14 is connected to the first connecting part. Whether the faucet at the hot water usage point is in the open state is judged by the water flow signal detected by the water flow sensor 5.

[0044] Optionally, the first accommodating cavity 101 is located above the second accommodating cavity 102 to facilitate the movement of the middle part of the diaphragm 10.

[0045] Optionally, the diaphragm 10 is a flexible diaphragm to facilitate the deformation of the middle part of the diaphragm 10 under the action of water pressure.

[0046] Optionally, it includes an electronic control board 8. The water pressure sensor 4, the water flow sensor 5, the circulation pump 6 and the three-way valve 3 are all communicatively connected to the electronic control board 8. The electronic control board 8 commands the circulation pump 6 and the three-way valve 3 to operate based on the real-time water pressure value obtained by the water pressure sensor 4 and the water flow signal obtained by the water flow sensor 5.

[0047] Optionally, the part of the cold water pipe located between the circulating water pump 6 and the water supply pipeline is the second connecting part, and the second water hole is connected to the second connecting part through a one-way valve 7.

[0048] Optionally, it further includes a housing 2. The water storage tank 1, the three-way valve 3, the circulating water pump 6, and the one-way valve 7 are all installed inside the housing 2. The second end of the first hot water pipe 31 extends out of the upper side of the housing 2, and the first end of the second hot water pipe 33 extends out of the lower side of the housing 2. The cold water pipe includes a water inlet part 34 and a water outlet part 32 that are connected to each other. The water inlet part 34 extends out of the lower side of the housing 2 and is connected to the water supply pipeline, and the water outlet part 32 extends out of the upper side of the housing 2 and is connected to the cold water inlet end of the gas water heater.

[0049] Please refer to Figures 1-6 , the control method of the hot water constant temperature device provided by the present utility model includes the following steps:

[0050] S1: The constant temperature device is in the standby state. The first interface 301 and the second interface 302 of the three-way valve 3 are default to be in the open state, the third interface 303 of the three-way valve 3 is default to be in the closed state, and the one-way valve 7 is in the normally open state;

[0051] S2: Determine whether the water flow sensor 5 detects a water flow signal. If so, it means that the faucet at the hot water usage point is opened, and then enter S3. If not, repeat S2;

[0052] S3: Determine whether the water flow sensor 5 does not detect a water flow signal. If so, it means that the hot water in the second accommodating cavity has run out, and the cold water in the gas water heater pipeline has flowed into the first accommodating cavity. At this time, enter S4. If not, repeat S3;

[0053] S4: Open the first interface 301 and the third interface 303 of the three-way valve 3, and close the second interface 302 of the three-way valve 3;

[0054] S5: Determine whether the water flow sensor 5 does not detect a water flow signal. If so, it means that the faucet at the hot water usage point is closed, and then enter S6. If not, repeat S5;

[0055] S6: Start the circulating water pump 6;

[0056] S7: Determine whether P1≥P0. If so, it means that the second accommodating cavity 102 is filled with hot water, and the middle part of the diaphragm 10 is pushed to the preset position. At this time, close the circulating water pump 6 and return to S1. If not, repeat S7;

[0057] Wherein, P1 is the real-time water pressure value of the current water path, and P0 is the preset water pressure value.

[0058] On the other hand, the present utility model provides a gas water heater device, including a gas water heater and the above-mentioned hot water constant temperature device.

[0059] The above are only some embodiments of the present utility model. For those of ordinary skill in the art, without departing from the creative concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A hot water constant temperature device, characterized in that: include: A water storage tank (1), comprising a tank body (11) and a diaphragm (10) arranged in the tank body (11), wherein the diaphragm (10) divides the interior of the tank body (11) into a first accommodating chamber (101) and a second accommodating chamber (102), and the tank body (11) is provided with a first water through hole (12), a second water through hole (13) and a third water through hole (14), wherein the first water through hole (12) and the second water through hole (13) are in communication with the first accommodating chamber (101), and the third water through hole (14) is in communication with the second accommodating chamber (102); A three-way valve (3), comprising a first interface (301), a second interface (302) and a third interface (303), wherein the first water hole (12) is connected to the second interface (302); A first hot water pipe (31), a first end of which is connected to the first interface (301), and a second end of which is connected to a hot water outlet of the gas water heater; A second hot water pipe (33), a first end of which is connected to a hot water point, a second end of which is connected to the third interface (303), and the third water hole (14) is connected to the second hot water pipe (33); A cold water pipe, a first end of which is connected to a water supply pipeline outside the gas water heater, and a second end of which is connected to a cold water inlet end of the gas water heater; A circulating water pump (6), installed on the cold water pipe; A one-way valve (7) is installed between the second water hole (13) and the circulating water pump (6).

2. The hot water thermostat according to claim 1, characterized in that: It also includes a water pressure sensor (4), which is installed between the first hot water pipe (31) and the first water through hole (12) or between the second water through hole (13) and the cold water pipe.

3. The hot water thermostat according to claim 1, characterized in that: It also includes a water flow sensor (5), the water flow sensor (5) is installed on the second hot water pipe (33), the part of the second hot water pipe (33) located between the water flow sensor (5) and the third interface (303) is a first connecting part, and the third water hole (14) is connected to the first connecting part.

4. The hot water thermostat according to claim 1, characterized in that: The first accommodating cavity (101) is located on the upper side of the second accommodating cavity (102).

5. The hot water thermostat according to any one of claims 1 to 4, characterized in that: It comprises an electric control board (8), and the circulating water pump (6) and the three-way valve (3) are both in communication connection with the electric control board (8).

6. The hot water thermostat according to any one of claims 1 to 4, characterized in that: The one-way valve (7) is a one-way valve.

7. The hot water thermostat according to any one of claims 1 to 4, characterized in that: It also includes a shell (2), wherein the water storage tank (1), the three-way valve (3), the circulating water pump (6) and the one-way valve (7) are all installed in the shell (2), the second end of the first hot water pipe (31) is arranged to extend out of the upper side of the shell (2), and the first end of the second hot water pipe (33) is arranged to extend out of the lower side of the shell (2), and the cold water pipe includes an inlet portion (34) and a water outlet portion (32) connected to each other, the inlet portion (34) extends out of the lower side of the shell (2) and is connected to the water supply pipeline, and the water outlet portion (32) extends out of the upper side of the shell (2) and is connected to the cold water inlet end of the gas water heater.

8. A gas water heater device, characterized in that: It comprises a gas water heater and the hot water constant temperature device according to any one of claims 1 to 7.

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