Expansion type constant-temperature bin suitable for preheating circulation and zero-cold-water gas water heater

Abstract

The expansion type constant-temperature bin and zero-cold-water gas water heater suitable for preheating circulation comprises a fixed tank and a communicating pipe arranged in the fixed tank, the fixed tank comprises an upper fixed tank body and a lower fixed tank body, and the communicating pipe comprises a water inlet pipe, a water outlet pipe and a central pipe. A plurality of water blocking holes inclining towards the water outlet pipe are formed in the circumference of the outer surface of the center pipe, and the upper end and the lower end of the center pipe are fixedly connected with an upper flange plate and a lower flange plate respectively. According to the expansion type constant-temperature bin suitable for preheating circulation, the temperature sensor and the electric heater are installed at the upper end and the lower end of the center pipe in the annular air bag respectively, in the preheating circulation process, the controller synchronously starts the temperature sensor to detect the temperature of water, and when a user opens a water using end, hot water can be rapidly discharged; and meanwhile, hot water is prevented from being used after single circulation, so that the cold water in the expansion tank is mixed into the hot water pipe, and the constant-temperature effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic hot water technology field especially relates to an expansion type constant temperature bin suitable for preheating circulation and zero cold water gas water heater. BACKGROUND

[0002] When the user uses the gas water heater, the gas water heater will be temporarily closed, the heat of the heat exchanger will be absorbed by the hot water, causing the water temperature to rise, when it is turned on again, the gas water heater will have a delay in the ignition process, causing part of the cold water to flow out, making the outlet temperature high and low, in order to solve this problem, an expansion tank will be provided on the gas water heater, when the user temporarily closes the gas water heater, the static pressure in the pipeline causes the expansion tank to expand and store the appropriate temperature of the hot water in the expansion tank, when the gas water heater is turned on again, the dynamic pressure in the pipeline decreases, the water in the expansion tank will come out and mix with the cold water flowing out, and hinder the flow of water in the heat exchange pipeline, reducing the amount of cold water flowing out, achieving the purpose of more constant temperature.

[0003] However, the gas water heater is usually installed in the kitchen, and there is a long pipeline between the water end, after the water is turned off, the water in the pipeline will gradually cool down, so the gas water heater will be equipped with a circulating pump for hot water preheating circulation, to reduce energy consumption and solve the problem of cold water discharge when first used. However, when the expansion tank is used for preheating circulation, the cold water in the expansion tank cannot be heated by using a mobile phone control or a key to perform hot water circulation, resulting in the mixing of cold water in the expansion tank into the hot water pipe when using hot water after preheating circulation, reducing the constant temperature effect. SUMMARY

[0004] Therefore, it is necessary to provide an expansion type constant temperature bin suitable for preheating circulation and zero cold water gas water heater, by installing temperature sensors and electric heaters on the upper and lower ends of the central pipe inside the annular air bag, during the preheating circulation process, the electric heater can heat the cold water inside the annular air bag, thereby avoiding the mixing of cold water in the expansion tank into the hot water pipe when using hot water after single circulation, and the constant temperature effect is better.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An expansion type constant temperature bin suitable for preheating circulation, comprising:

[0007] The fixed tank and the communication pipe arranged inside the fixed tank, the fixed tank includes an upper fixed tank and a lower fixed tank, the communication pipe includes a water inlet pipe, a water outlet pipe and a center pipe, the outer surface of the center pipe is circumferentially provided with a plurality of water blocking holes inclined to the water outlet pipe, the plurality of water blocking holes are divided into two groups, the upper and lower ends of the center pipe are fixedly connected with an upper flange plate and a lower flange plate respectively, the fixed tank and the communication pipe are made of 316 stainless steel;

[0008] The annular air bag is fixedly connected between the upper fixed tank and the upper flange plate through six first screws, the bottom end of the annular air bag is fixedly connected between the lower fixed tank and the lower flange plate through six second screws, and the upper and lower ends of the outer surface of the center pipe are respectively provided with a temperature sensor and an electric heater.

[0009] Further, the upper fixed tank and the lower fixed tank are provided with threaded holes and a plurality of first through holes, the side away from the upper flange plate and the lower flange plate is provided with a second through hole and a plurality of threaded blind holes, the positions of the threaded holes and the second through hole correspond, the positions of the first through holes and the threaded blind holes correspond, and the first screws and the second screws penetrate the first through holes and are threadedly connected with the threaded blind holes.

[0010] Further, the temperature sensor includes an upper mounting seat, a detection head and an upper connecting line, the upper mounting seat is threadedly connected in the upper threaded hole of the upper fixed tank, the detection head penetrates the second through hole of the upper flange plate, the electric heater includes a lower mounting seat, a heating head and a lower connecting line, the lower mounting seat is threadedly connected in the threaded hole of the lower fixed tank, and the heating head penetrates the second through hole of the lower flange plate.

[0011] Further, the bottom end of the center pipe is provided with a limiting groove on the outer surface, the second through hole is communicated with the limiting groove, and the heating head extends into the limiting groove.

[0012] Further, the number of the electric heaters is two, and the two electric heaters are arranged on the two sides of the center pipe.

[0013] Further, the annular air bag is circumferentially provided with a plurality of mounting holes on the upper and lower sides, and the annular air bag is made of food-grade natural rubber.

[0014] Further, the upper fixed tank and the lower fixed tank are welded and fixed, the water inlet pipe is welded and fixed with the upper fixed tank, and the water outlet pipe is welded and fixed with the lower fixed tank.

[0015] The zero-cold-water gas water heater comprises a gas water heater, a circulating pump, a controller and the expansion type constant temperature bin, the temperature sensor and the electric heater are electrically connected with the controller, the fixed tank is installed in the interior of the gas water heater, the water inlet pipe is connected with the water outlet of the gas water heater, and the water outlet pipe is connected with the hot water pipeline.

[0016] Compared with the prior art, the zero-cold-water gas water heater has the following beneficial effects:

[0017] The expansion type constant temperature bin suitable for preheating circulation and the zero-cold-water gas water heater have the following beneficial effects. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model provides a three -dimensional structure schematic diagram of expansion type constant temperature bin suitable for preheating circulation provided by the utility model;

[0019] Figure 2 The utility model provides a front view cross section structure schematic diagram of expansion type constant temperature bin suitable for preheating circulation provided by the utility model;

[0020] Figure 3 The utility model provides temperature sensor installation schematic drawing of expansion type constant temperature bin suitable for preheating circulation provided by the utility model;

[0021] Figure 4 The utility model provides the installation schematic drawing of electric heater of expansion type constant temperature bin suitable for preheating circulation provided by the utility model;

[0022] Figure 5 The utility model provides the explosion schematic drawing of expansion type constant temperature bin suitable for preheating circulation provided by the utility model;

[0023] Figure 6 The utility model provides the hot water circulation structure schematic drawing of zero-cold-water gas water heater provided by the utility model.

[0024] Markings in the drawing are as follows:

[0025] 1, upper fixed tank; 2, lower fixed tank; 3, water inlet pipe; 4, water outlet pipe; 5, center pipe; 6, water blocking hole; 7, upper flange plate; 8, lower flange plate; 9, annular air bag; 10, first screw; 11, second screw; 12, temperature sensor; 13, electric heater; 21, water heater; 22, circulating pump; 23, hot water pipeline; 24, cold water pipeline; 25, water end; 26, check valve; 27, controller; 101, threaded hole; 102, first through hole; 701, second through hole; 702, threaded blind hole; 1201, upper mounting seat; 1202, detection head; 1203, upper connecting line; 1301, lower mounting seat; 1302, heating head; 1303, lower connecting line; 501, limiting groove; 901, mounting hole. DETAILED DESCRIPTION

[0026] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are all embodiments. Based on the embodiments in the present application, all other embodiments obtained are not within the scope of protection of the present application.

[0027] In order to solve this technical problem, the present application provides an expansion type constant temperature bin suitable for preheating circulation, which is applied to a household hot water zero cold water circulation system. The zero cold water circulation system comprises an existing water heater 21, a circulating pump 22, a hot water pipeline 23, a cold water pipeline 24, a water end 25, a check valve 26 and a controller 27. The water heater 21 is internally provided with a heat exchange pipeline. The following will take a commonly used 16 liter gas water heater circulation system as an example for description. The check valve 26 is installed between the cold water pipeline 24 and the hot water pipeline 23 of the water end 25 to constitute a 4-way pipeline zero cold water hot water circulation system. The working principle of the hot water circulation is prior art, which will not be described in detail.

[0028] Specifically, please refer to Figures 1-6 , the expansion type constant temperature bin suitable for preheating circulation comprises a fixed tank and a communication pipe arranged in the fixed tank. The fixed tank is installed in the inside of the water heater 21. The fixed tank is provided with an inflation valve. The fixed tank and the communication pipe are made of 316 stainless steel. The high temperature stability of 316 stainless steel is better than that of 304 stainless steel. It can maintain good performance in a higher temperature environment. The high temperature resistance of 316 stainless steel is excellent. The fixed tank comprises an upper fixed tank 1 and a lower fixed tank 2. The communication pipe comprises a water inlet pipe 3, a water outlet pipe 4 and a center pipe 5. The water inlet pipe 3 is threadedly fixedly connected with the water outlet of the water heater 21. The water outlet pipe 4 is threadedly fixedly connected with the hot water pipeline 23. A plurality of water blocking holes 6 inclined to the water outlet pipe 4 are formed in the outer surface of the center pipe 5. The plurality of water blocking holes 6 are divided into two groups. The upper and lower ends of the center pipe 5 are fixedly connected with the upper flange plate 7 and the lower flange plate 8, respectively.

[0029] The top end of the annular air bag 9 is fixedly connected between the upper fixed tank 1 and the upper flange plate 7 through six first screws 10, and the bottom end of the annular air bag 9 is fixedly connected between the lower fixed tank 2 and the lower flange plate 8 through six second screws 11. The upper and lower ends of the outer surface of the central pipe 5 are respectively provided with a temperature sensor 12 and an electric heater 13. The temperature sensor 12 and the electric heater 13 are electrically connected with the controller 27. The temperature sensor 12 is located at the top, and the electric heater 13 is located at the bottom.

[0030] After installation, the static pressure of the hot water pipeline makes the annular air bag 9 expand and store high-pressure water. When not used for a long time, the stored hot water between the annular air bag 9 and the central pipe 5 will cool into cold water. Since the temperature sensor 12 and the electric heater 13 are electrically connected with the controller 27, when the user starts the circulating pump 22 by using the mobile phone or the key, the water circulates and is heated along the water heater 21, the hot water pipeline 23, the cold water pipeline 24, and the one-way valve 26, and stops circulating when the temperature sensor in the water heater 21 detects hot water. During the circulation, the controller 27 synchronously starts the temperature sensor 12 to detect the temperature of the water. When the temperature is relatively low, such as below 35 degrees, the electric heater 13 can heat the cold water during the circulation process to reach a suitable temperature, such as 42 degrees. At this time, the annular air bag 9 and the central pipe 5 store hot water. Then, when the user opens the water outlet 25, hot water can be quickly discharged without discharging cold water. At the same time, the dynamic pressure of the hot water pipeline 23 decreases, the annular air bag 9 shrinks, the hot water in the annular air bag 9 flows out from the water-blocking hole 6, the amount of cold water discharged from the water heater 21 during the second start-stop is reduced, and the hot water in the annular air bag 9 mixes with the discharged cold water, thereby avoiding the mixing of cold water in the expansion tank into the hot water pipeline after a single circulation, and achieving better constant temperature effect.

[0031] After the user turns off the hot water, the static pressure of the hot water pipeline 23 increases, the hot water enters the annular air bag 9 and is stored, and the annular air bag 9 expands until the pressure reaches equilibrium. When the hot water is used again for a short time, the temperature of the hot water in the annular air bag 9 is relatively high, and the hot water in the annular air bag 9 does not need to be electrically heated. When the hot water is not used for a long time, the hot water does not need to be kept warm all the time.

[0032] The working principle of the annular air bag 9 can be referred to the patent with the application number 202311410525.8.

[0033] As Figures 1-5As shown in the figure: in this embodiment, the upper fixed tank 1 and the lower fixed tank 2 are both provided with threaded holes 101 and a plurality of first through holes 102, and the sides away from the upper flange plate 7 and the lower flange plate 8 are both provided with second through holes 701 and a plurality of threaded blind holes 702, the threaded blind holes 702 will not be communicated with the inside of the annular air bag 9, the threaded holes 101 correspond to the positions of the second through holes 701, the first through holes 102 correspond to the positions of the threaded blind holes 702, and the first screw 10 and the second screw 11 both penetrate the first through hole 102 and are threadedly connected with the threaded blind hole 702; the temperature sensor 12 includes an upper mounting seat 1201, a detection head 1202 and an upper connecting line 1203, the upper mounting seat 1201 is threadedly connected inside the upper threaded hole 101 of the upper fixed tank 1, and the detection head 1202 penetrates the second through hole 701 in the upper flange plate 7; the electric heater 13 includes a lower mounting seat 1301, a heating head 1302 and a lower connecting line 1303, the lower mounting seat 1301 is threadedly connected inside the threaded hole 101 of the lower fixed tank 2, and the heating head 1302 penetrates the second through hole 701 of the lower flange plate 8; a sealing gasket is arranged between the upper mounting seat 1201 and the upper fixed tank 1, and a sealing gasket is arranged between the lower mounting seat 1301 and the lower fixed tank 2, so as to avoid water leakage and make the sealing and fixing of the two ends of the annular air bag 9 more firm.

[0034] As shown in the figure: Figure 2 and Figure 5 As shown in the figure: in this embodiment, the bottom end outer surface of the center pipe 5 is provided with a limiting groove 501, the second through hole 701 is communicated with the limiting groove 501, and the heating head 1302 extends into the inside of the limiting groove 501; the limiting groove 501 is formed by a partition plate fixedly connected to the outer surface of the center pipe 5, so that the annular air bag 9 will not be in contact with the high-temperature heating head 1302 after contraction.

[0035] As shown in the figure: Figure 1 and Figure 2 As shown in the figure: in this embodiment, the number of electric heaters 13 is two, and the two electric heaters 13 are arranged on the two sides of the center pipe 5, so that the water inside the annular air bag 9 can be better heated, and of course the number of electric heaters 13 can be more, and the heating will be more uniform.

[0036] As shown in the figure: Figure 2 and Figure 5 As shown in the figure: in this embodiment, a plurality of mounting holes 901 are circumferentially provided on the upper and lower sides of the annular air bag 9, the annular air bag 9 is made of food-grade natural rubber material, and the first screw 10, the second screw 11, the temperature sensor 12 and the electric heater 13 can all penetrate the mounting hole 901 without affecting the sealing and fixing of the two ends of the annular air bag 9.

[0037] In the embodiment, the upper fixing tank 1 and the lower fixing tank 2 are welded and fixed, the water inlet pipe 3 is welded and fixed with the upper fixing tank 1, and the water outlet pipe 4 is welded and fixed with the lower fixing tank 2, so that the installation is more convenient, and the fixing is firm and reliable.

[0038] In the utility model, unless another definite provision and limitation, the terms "installation", "connection", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be directly connected, also can indirectly connect through intermediate medium, can be two element inside's intercommunication or two element's interaction relation, unless another definite limitation. For ordinary skilled person in the art, the above-mentioned terms can be understood according to the specific meaning in the utility model.

Claims

1. An expansion thermostatic cartridge suitable for pre-heat cycling, characterized in that, It includes: The fixed tank and the communication pipe arranged inside the fixed tank, the fixed tank includes upper fixed tank (1) and lower fixed tank (2), the communication pipe includes water inlet pipe (3), water outlet pipe (4) and center pipe (5), the outer surface of the center pipe (5) is circumferentially provided with a plurality of water blocking holes (6) inclined to the water outlet pipe (4), a plurality of the water blocking holes (6) are divided into two groups, the upper and lower ends of the center pipe (5) are fixedly connected with upper flange (7) and lower flange (8) respectively, the fixed tank and the communication pipe are made of 316 stainless steel; Annular air bag (9), the top end of the annular air bag (9) is fixedly connected between the upper fixed tank (1) and the upper flange (7) by six first screws (10), the bottom end of the annular air bag (9) is fixedly connected between the lower fixed tank (2) and the lower flange (8) by six second screws (11), the upper and lower ends of the outer surface of the center pipe (5) are respectively provided with temperature sensor (12) and electric heater (13).

2. The expansion thermostatic capsule suitable for pre-heat-up cycle according to claim 1, characterized in that, The upper fixed tank (1) and the lower fixed tank (2) are provided with threaded holes (101) and a plurality of first through holes (102), the side away from the upper flange (7) and the lower flange (8) is provided with a second through hole (701) and a plurality of threaded blind holes (702), the positions of the threaded holes (101) and the second through hole (701) correspond, the positions of the first through hole (102) and the threaded blind hole (702) correspond, the first screw (10) and the second screw (11) penetrate the first through hole (102) and are threadedly connected with the threaded blind hole (702).

3. The expansion thermostatic capsule suitable for pre-heat-up cycle according to claim 2, characterized in that, The temperature sensor (12) includes upper mounting seat (1201), detection head (1202) and upper connecting wire (1203), the upper mounting seat (1201) is threadedly connected inside the upper threaded hole (101) of the upper fixed tank (1), the detection head (1202) penetrates the second through hole (701) on the upper flange (7), the electric heater (13) includes lower mounting seat (1301), heating head (1302) and lower connecting wire (1303), the lower mounting seat (1301) is threadedly connected inside the threaded hole (101) of the lower fixed tank (2), the heating head (1302) penetrates the second through hole (701) of the lower flange (8).

4. The expansion thermostatic capsule suitable for pre-heat-up cycle according to claim 3, characterized in that, The bottom end outer surface of the center pipe (5) is provided with a limiting groove (501), the second through hole (701) communicates with the limiting groove (501), and the heating head (1302) extends into the inside of the limiting groove (501).

5. The expansion thermostatic capsule suitable for pre-heat-up cycle according to claim 4, characterized in that, The number of the electric heater (13) is two, and the two electric heaters (13) are arranged on both sides of the center pipe (5).

6. The expansion thermostatic capsule suitable for pre-heat up cycle according to claim 5, characterized in that, The upper and lower sides of the annular air bag (9) are circumferentially provided with a plurality of mounting holes (901), and the annular air bag (9) is made of food-grade natural rubber.

7. The expansion thermostatic capsule suitable for pre-heat up cycle according to claim 6, characterized in that, The upper fixed tank (1) and the lower fixed tank (2) are welded and fixed, the water inlet pipe (3) is welded and fixed with the upper fixed tank (1), and the water outlet pipe (4) is welded and fixed with the lower fixed tank (2).

8. A zero-cold-water gas water heater, characterized by, The expansion type constant temperature tank of any one of claims 1-7, a gas water heater (21), a circulating pump (22), a controller (27), and a temperature sensor (12) and an electric heater (13) are electrically connected with the controller (27), the fixed tank is installed in the interior of the gas water heater (21), the water inlet pipe (3) is connected with a water outlet of the gas water heater (21), and the water outlet pipe (4) is connected with a hot water pipeline (23).

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