Energy-saving cold water temporary storage device and cold water circulation system

Abstract

The utility model provides an energy-saving cold water temporary storage device and a cold water circulation system, and belongs to the technical field of domestic hot water. Comprising a heat storage controller, a heat preservation tank, a temperature control three-way valve, a first water flow sensor and a drainage valve, a hot water storage cavity and a cold water storage cavity are formed in the heat preservation tank through a piston, an electric heater and a temperature sensor are installed in the hot water storage cavity, and the water outlet end of the temperature control three-way valve is connected to the bottom end of the hot water storage cavity. Warm water is introduced into the bottom of the hot water storage cavity, so that the warm water in the hot water pipe can be directly used, the energy consumption of the water heater is reduced, water resource waste is avoided, cold water and high-temperature water during secondary start and stop of the gas water heater can be well mixed when the water heater is used in combination with the gas water heater accidentally, and the water heater is energy-saving and environment-friendly. And even if the water is turned off and then the water is turned on, larger temperature difference cannot occur, so that the problem of cold and hot water during secondary start and stop of the gas water heater can be eliminated, and the effect is better when the gas water heater is used for bathing.

Description

Technical Field

[0001] The utility model relates to the technical field of domestic hot water, in particular to an energy-saving cold water temporary storage device and a cold water circulation system. Background Art

[0002] In the hot water piping system in our daily life, there is usually a distance between various hot water equipment and the water use point. For example, most gas water heaters are installed in the kitchen, and the water use point (washbasin) is located in the bathroom. Therefore, there is a distance of several meters to more than ten meters from the water heater to the water use point. After the hot water is not used, the hot water in the hot water pipe will gradually cool down to cold water. When it is used again, the cold water in the hot water pipe needs to flow out before the hot water can be used again. The user experience is not good. Therefore, a zero cold water system with no need to wait for hot water has appeared on the market.

[0003] Publication No. CN117419462A discloses a cold water temporary storage device, in which hot water is pre-stored in a hot water storage chamber. When in use, cold water in a hot water pipe first enters the cold water storage chamber, and the hot water in the hot water storage chamber is pushed out by a piston, thereby realizing a zero cold water function.

[0004] In this way, after the faucet is used for the first time and closed, the hot water in the hot water pipe will gradually decrease to warm water. When the faucet is opened again, the warm water in the hot water pipe will enter the cold water storage chamber. After the faucet is closed, the temporarily stored warm water will be discharged. This not only increases the energy consumption of the water heater, but also wastes water resources. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an energy-saving cold water temporary storage device and a cold water circulation system to solve the problem that the warm water temporarily stored in the existing cold water temporary storage device will be discharged after the faucet is closed for the second time, which not only increases the energy consumption of the water heater but also wastes water resources.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] An energy-saving cold water temporary storage device comprises a heat storage controller, an insulation tank, a temperature control three-way valve, a first water flow sensor and a drain valve, wherein the insulation tank is formed with a hot water storage chamber and a cold water storage chamber by a piston, an electric heater and a temperature sensor are installed in the hot water storage chamber, the water outlet end of the temperature control three-way valve is connected to the bottom end of the hot water storage chamber, a water outlet pipe is installed at the top end of the hot water storage chamber, and the first water flow sensor is installed on the water outlet pipe.

[0008] Preferably, the water outlet end of the temperature-controlled three-way valve extends to the bottom of the hot water storage chamber through a fixed pipe, and a gap is left between the fixed pipe and the inner bottom wall of the hot water storage chamber.

[0009] Preferably, the insulation tank is made of a material with slow heat conduction and low specific heat capacity.

[0010] Preferably, it also includes a circulation pump and a second water flow sensor, and the circulation pump is installed at the water inlet end of the drain valve.

[0011] Preferably, the drain valve is a one-way valve.

[0012] Preferably, the circulation pump is a booster pump.

[0013] Preferably, the water outlet end of the temperature-controlled three-way valve is connected to a bypass pipe, a first control valve is installed on the bypass pipe, and the first control valve is electrically connected to the heat storage controller.

[0014] Preferably, the first control valve is a flow control valve.

[0015] A cold water circulation system comprises the energy-saving cold water temporary storage device mentioned above.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] 1. By introducing warm water into the bottom of the hot water storage chamber and supplementing it with an electric heater, the warm water in the hot water pipe can be used directly without allowing the warm water to enter the cold water storage chamber. Only when the water in the hot water pipe becomes cold water will the drain valve drain water, thereby reducing the energy consumption of the water heater and avoiding wasting water resources.

[0018] 2. When using the cold water temporary storage device, it was unexpectedly discovered that since the volume of the hot water storage chamber is large enough, when used in conjunction with a gas water heater, it can mix the cold water and high-temperature water during the secondary start and stop of the gas water heater very well. Even if the water is turned off and then on again, there will be no large temperature difference, thereby eliminating the problem of cold and hot water during the secondary start and stop of the gas water heater, and the effect is better when used for bathing.

[0019] 3. By setting a bypass pipe and a first control valve, when hot water is briefly used to wash hands by turning on the faucet, cold water enters the bottom of the hot water storage chamber, and the hot water at the top of the hot water storage chamber will preferentially flow out through the outlet pipe and the faucet. After the faucet is closed, the incoming cold water is heated by the electric heater. Since the water heater will not start when hot water is briefly used, there is no need to fill the hot water pipe with hot water, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0021] Figure 1 It is a schematic diagram of the first structure of the energy-saving cold water temporary storage device;

[0022] Figure 2 It is a schematic diagram of the second structure of the energy-saving cold water temporary storage device;

[0023] Figure 3 It is a structural schematic diagram of an energy-saving cold water temporary storage device used in conjunction with a water heater;

[0024] Figure 4 A schematic diagram of the structure of adding a circulation pump to an energy-saving cold water temporary storage device;

[0025] Figure 5 A schematic diagram of the structure of adding a bypass pipe to an energy-saving cold water temporary storage device;

[0026] Figure 6 A schematic diagram of the structure of an energy-saving cold water temporary storage device with a circulating pump and a water heater;

[0027] Figure 7 This is a schematic diagram of the structure of adding a bypass pipe to the energy-saving cold water temporary storage device and using it in conjunction with a water heater;

[0028] Figure 8 A schematic diagram of the water flow structure of an energy-saving cold water temporary storage device when a bypass pipe is added to the device and used in conjunction with a water heater;

[0029] Fig. 9 This is a schematic diagram of the structure in which the temperature control three-way valve of the energy-saving cold water temporary storage device is installed at the bottom.

[0030] [Reference Signs]

[0031] 1. Heat storage controller; 2. Insulation tank; 3. Temperature control three-way valve; 4. First water flow sensor; 5. Drain valve; 6. Piston; 7. Hot water storage chamber; 8. Cold water storage chamber; 9. Electric heater; 10. Temperature sensor; 11. Water outlet pipe; 12. Faucet; 13. Water heater; 14. Hot water pipe; 15. Fixed pipe; 16. Circulation pump; 17. Second water flow sensor; 18. Bypass pipe; 19. First control valve; 20. Cold water pipe.

[0032] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0033] The following is a detailed description of an energy-saving cold water temporary storage device and a cold water circulation system provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0034] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0035] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0036] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0037] like Figure 1-3 As shown, the embodiment of the utility model provides an energy-saving cold water temporary storage device, including a heat storage controller 1, a heat preservation tank 2, a temperature control three-way valve 3, a first water flow sensor 4 and a drain valve 5. The heat preservation tank 2 is formed with a hot water storage chamber 7 and a cold water storage chamber 8 through a piston 6. The above structure is a prior art. An electric heater 9 and a temperature sensor 10 are installed in the hot water storage chamber 7, which are arranged on a side away from the piston 6. The water outlet end of the temperature control three-way valve 3 is connected to the bottom end of the hot water storage chamber 7, and a water outlet pipe 11 is installed at the top of the hot water storage chamber 7. The electric heater 9 and the temperature sensor 10 are both electrically connected to the heat storage controller 1, and the first water flow sensor 4 is installed on the water outlet pipe 11;

[0038] like Figure 2 As shown, the water outlet end of the temperature control three-way valve 3 can also extend to the bottom of the hot water storage chamber 7 through the fixed pipe 15, and a gap is left between the fixed pipe 15 and the inner bottom wall of the hot water storage chamber 7;

[0039] When in use, the piston 6 slides horizontally, the water outlet pipe 11 is connected to the faucet 12, the water inlet end of the temperature control three-way valve 3 is connected to the water heater 13 through the hot water pipe 14, and the drain valve 5 can be placed in a water storage container to avoid waste. The electric heater 9 cooperates with the temperature sensor 10 to heat the hot water storage chamber 7 to the same temperature as the water heater 13;

[0040] When hot water is used for the first time, the temperature control three-way valve 3 is connected to the cold water storage chamber 8. At this time, the cold water in the hot water pipe 14 enters the cold water storage chamber 8, and the hot water in the hot water storage chamber 7 is pushed out by the piston 6. When the hot water pipe 14 is full of hot water, the temperature control three-way valve 3 is connected to the hot water storage chamber 7. At this time, the hot water in the gas water heater 13 enters the bottom of the hot water storage chamber 7, and the hot water at the top of the hot water storage chamber 7 flows out through the water outlet pipe 11 and the faucet 12;

[0041] After the first water flow sensor 4 detects that the faucet 12 is closed, the heat storage controller 1 opens the drain valve 5, and the hot water fills the hot water storage chamber 7. When the hot water in the hot water pipe 14 drops to warm water, the faucet 12 is opened, and the warm water enters the bottom of the hot water storage chamber 7, and the hot water at the top of the hot water storage chamber 7 flows out through the water outlet pipe 11 and the faucet 12. At the same time, the electric heater 9 heats the water in the hot water storage chamber 7. When the hot water pipe 14 is full of hot water, the hot water in the hot water pipe 14 also enters the hot water storage chamber 7 and flows out through the water outlet pipe 11 and the faucet 12.

[0042] In this arrangement, warm water is introduced into the bottom of the hot water storage chamber 7 and is heated by the electric heater 9, so that the warm water in the hot water pipe 14 can also be used directly without allowing the warm water to enter the cold water storage chamber 8. Only when the water in the hot water pipe 14 becomes cold water, the drain valve 5 will drain the water, thereby reducing the energy consumption of the water heater 13 and avoiding wasting water resources.

[0043] The above scheme can be applied to other water heaters such as pressurized solar water heaters, air energy water heaters and gas water heaters. It is unexpectedly found during use that since the volume of the hot water storage chamber 7 is large enough, when used in conjunction with the gas water heater 13, the cold water and high-temperature water of the gas water heater 13 during the secondary start and stop can be well mixed, and there will be no large temperature difference even if the water is turned off and then on, thereby eliminating the problem of cold and hot water during the secondary start and stop of the gas water heater 13, and the effect is better when used for bathing.

[0044] In this embodiment, the heat preservation tank 2 is made of a material with slow heat conduction and low specific heat capacity. This arrangement can reduce the absorption of water temperature by the heat preservation tank 2 during heat storage and increase the temperature during heat storage.

[0045] like Figure 4 and 6 As shown, in this embodiment, a circulation pump 16 and a second water flow sensor 17 are also included. The circulation pump 16 is installed at the water inlet end of the drain valve 5, and the second water flow sensor 17 can be installed at the water inlet end of the circulation pump 16.

[0046] In this way, the drain valve 5 is set as an electric control valve. At this time, the drain valve 5 can be connected to the cold water pipe 20. Since the circulating pump 16 and the cold water temporary storage device are an integral structure, they only need to be installed at the faucet 12. The user does not need to install the circulating pump 16 separately, and the circulating pump 16 is very convenient to connect with the heat storage controller 1.

[0047] In this embodiment, the drain valve 5 is a one-way valve. After the hot water storage chamber 7 is filled with hot water, the piston 6 moves to the far right to block the water inlet of the drain valve 5. There is no need to control the drain valve 5, and turning on the cold water will not accidentally start the water heater 13.

[0048] In this embodiment, the circulation pump 16 is a booster pump. In this way, when cold water enters the cold water storage chamber 8, the output pressure of the circulation pump 16 is relatively large, and a small amount of cold water can be delivered to the cold water pipe 20.

[0049] like Figure 5 , Figure 7 and Figure 8 As shown, in this embodiment, the water outlet end of the temperature control three-way valve 3 is connected to a bypass pipe 18, and a first control valve 19 is installed on the bypass pipe 18, and the first control valve 19 is electrically connected to the heat storage controller 1;

[0050] During installation, the bypass pipe 18 is connected to the cold water pipe 20, and a short-term water use button is provided on the heat storage controller 1. When hot water is used normally, the first control valve 19 is closed and will not affect the use;

[0051] When washing hands with hot water for a short time, the short-term water use button provided on the heat storage controller 1 is pressed, and the temperature control three-way valve 3 closes the passage between the hot water storage chamber 7 and the cold water storage chamber 8, and the first control valve 19 is opened. At this time, the faucet 12 is opened, and cold water enters the bottom of the hot water storage chamber 7, and the hot water at the top of the hot water storage chamber 7 flows out through the water outlet pipe 11 and the faucet 12. After closing the faucet 12, the cold water entering is heated by the electric heater 9. Since the water heater 13 will not be started when hot water is used for a short time, it is not necessary to fill the hot water pipe 14 with hot water, thereby reducing energy consumption;

[0052] It should be noted that in order to use safe voltage power supply, the power of the electric heater 9 is relatively low, and the opening time of the first control valve 19 should be controlled. Too much cold water entering the hot water storage chamber 7 will cause the water temperature to be lower when washing hands.

[0053] In this embodiment, the first control valve 19 is a flow control valve or the diameter of the bypass pipe 18 is set to be smaller.

[0054] This setting can increase the use time of hot water and save water resources because it does not require too much flow when washing hands.

[0055] A cold water circulation system comprises the cold water temporary storage device mentioned above.

[0056] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0057] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An energy-saving cold water temporary storage device, comprising a heat storage controller, a heat preservation tank, a temperature control three-way valve, a first water flow sensor and a drain valve, wherein the heat preservation tank is formed with a hot water storage chamber and a cold water storage chamber by a piston, characterized in that: An electric heater and a temperature sensor are installed in the hot water storage chamber, the water outlet end of the temperature-controlled three-way valve is connected to the bottom end of the hot water storage chamber, a water outlet pipe is installed at the top end of the hot water storage chamber, and the first water flow sensor is installed on the water outlet pipe.

2. The energy-saving cold water temporary storage device according to claim 1, characterized in that: The water outlet end of the temperature control three-way valve extends to the bottom of the hot water storage chamber through a fixed pipe, and a gap is left between the fixed pipe and the inner bottom wall of the hot water storage chamber.

3. The energy-saving cold water temporary storage device according to claim 2, characterized in that: The heat preservation tank is made of a material with slow heat conduction and low specific heat capacity.

4. The energy-saving cold water temporary storage device according to claim 3, characterized in that: It also includes a circulation pump and a second water flow sensor, wherein the circulation pump is installed at the water inlet end of the drain valve.

5. The energy-saving cold water temporary storage device according to claim 4, characterized in that: The drain valve is a one-way valve.

6. The energy-saving cold water temporary storage device according to claim 5, characterized in that: The circulating pump is a booster pump.

7. The energy-saving cold water temporary storage device according to claim 1, characterized in that: The water outlet end of the temperature control three-way valve is connected to a bypass pipe, a first control valve is installed on the bypass pipe, and the first control valve is electrically connected to the heat storage controller.

8. The energy-saving cold water temporary storage device according to claim 7, characterized in that: The first control valve is a flow control valve.

9. A cold water circulation system, characterized in that: The invention comprises the energy-saving cold water temporary storage device as described in any one of claims 1 to 8.

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