Air source heat pump water heater capable of automatically returning water

Abstract

The utility model discloses an air source heat pump water heater capable of automatically returning water, which comprises an air source heat pump water heater, and the air source heat pump water heater comprises a water storage tank. One end of the hot water supply pipe is connected with the water storage tank, and the other end is connected with the user-side water supply device; the temperature control water return valve is mounted at the tail end of the hot water supply pipe; one end of the water return pipe is connected with the temperature control water return valve and the other end is connected with the water return interface of the water storage tank; and the one-way backflow device is arranged on the water return pipe. Through reasonable configuration of the temperature control water return valve and the water return pipe, when the water temperature in the hot water supply pipe is lower than a set value, the temperature control water return valve is automatically opened, cold water in the pipe flows back to the water storage tank through the water return pipe, automatic backflow of the cold water is achieved, and the problems that a traditional air source heat pump water heater is long in hot water waiting time and cold water is wasted are effectively solved; the utilization rate of water resources is improved, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air source heat pump water heater field, concretely relates to an air source heat pump water heater of automatic backwater, especially suitable for solving water resource waste and hot water supply waiting time long problem. BACKGROUND

[0002] Air source heat pump water heater as a kind of efficient energy-saving hot water supply equipment, has been widely applied in family and commercial scene.Compared with traditional electric water heater and gas water heater, air source heat pump water heater is heated by absorbing the heat energy in air, with the advantages of high energy efficiency, energy saving and environmental protection, especially in long time, strong economy and practicability of large flow hot water demand environment.However, existing air source heat pump water heater still has some problems in actual use, and technical improvement is urgently needed.

[0003] Although air source heat pump water heater is superior in performance, but in actual application, still face following two main problems, in water heater water supply system, hot water is transported to user end (such as washbasin, shower head etc.) from air source heat pump water heater through pipeline.Due to long hot water pipeline or low ambient temperature, cold water is often stored in the pipeline between water outlet of water heater and water using point.When user opens hot water tap, cold water in pipeline needs to be discharged first, to achieve the purpose of hot water supply.This process leads to that hot water waiting time is too long, influence user experience.At the same time, hot water in hot water pipeline will gradually cool down in long time non-use condition, so that hot water in pipeline loses energy.When user uses hot water again, cooled water needs to be reheated, which not only increases the energy consumption of water heater, but also reduces the energy saving effect of system, therefore, we provide an air source heat pump water heater of automatic backwater to solve above problems. SUMMARY

[0004] The utility model provides an air source heat pump water heater of automatic backwater, aims at solving the problem of long hot water waiting time and water resource waste of traditional air source heat pump water heater in use.

[0005] To solve the above technical problem, the utility model adopts the technical scheme of an air source heat pump water heater of automatic backwater, comprising air source heat pump water heater, the air source heat pump water heater includes water storage tank,

[0006] Hot water supply pipe, one end is connected with the water storage tank, and the other end is connected with user end water supply device;

[0007] Temperature control backwater valve, the temperature control backwater valve is installed in the end of hot water supply pipe, for automatically controlling pipeline backwater according to water temperature;

[0008] A return water pipe is connected to the temperature-controlled return water valve at one end and to a return water interface of the water storage tank at the other end.

[0009] A one-way return device is arranged on the return water pipe to prevent cold water from entering the hot water supply pipe in reverse.

[0010] The temperature-controlled return water valve and the one-way return device together realize automatic return of cold water in the hot water pipeline to the water storage tank.

[0011] Preferably, the air source heat pump water heater capable of automatic return of water comprises a bimetallic strip assembly for sensing the water temperature in the hot water supply pipe and driving the temperature-controlled return water valve to open when the water temperature is lower than a set value, so that cold water flows into the return water pipe.

[0012] Preferably, the one-way return device is a mechanical one-way valve, the inlet end of which is connected to the return water pipe, and the outlet end of which is connected to the return water interface of the water storage tank, and the one-way valve controls the opening and closing state by a mechanical spring to ensure that the return water direction is unique.

[0013] Preferably, the diameter of the return water pipe is smaller than that of the hot water supply pipe to reduce the return water resistance and improve the return water efficiency.

[0014] Preferably, the air source heat pump water heater further comprises a return interface pipe arranged at the bottom of the water storage tank, and the end of the return water pipe is connected to the return interface pipe to realize return of cold water to the bottom of the water storage tank.

[0015] Preferably, the air source heat pump water heater further comprises a pressure balance pipe arranged between the return water pipe and the one-way return device to balance the water pressure in the return water pipe and the water pressure in the water storage tank and ensure smooth return of water.

[0016] The air source heat pump water heater has the advantages and beneficial effects that:

[0017] The temperature-controlled return water valve and the return water pipe are reasonably configured, the temperature-controlled return water valve is automatically opened when the water temperature in the hot water supply pipe is lower than a set value, cold water in the pipeline is returned to the water storage tank through the return water pipe, automatic return of cold water is realized, the problems of long waiting time for hot water and waste of cold water existing in traditional air source heat pump water heaters are effectively solved, the water resource utilization rate is improved, and the user experience is improved.

[0018] The utility model discloses a one -way backflow device is installed on the backwater pipe, can effectively control the water flow direction, prevent cold water reverse into hot water supply pipe, ensure the quality of hot water supply, simultaneously, the pressure balance pipe is arranged between backwater pipe and water storage tank, is used for balancing the water pressure in backwater pipe and the water pressure in water storage tank, guarantees the backwater process smooth, further improved the backwater efficiency and system stability of water heater. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0020] Figure 2 It is the three-dimensional structure schematic diagram of the utility model hidden air source heat pump water heater;

[0021] Figure 3 It is the utility model Figure 2 A place of the enlarged diagram in the utility model;

[0022] Figure 4 It is the utility model Figure 2 B place of the enlarged diagram in the utility model.

[0023] In the drawing: 1, air source heat pump water heater;2, pressure balance pipe;3, water storage tank;4, hot water supply pipe;5, temperature -controlled backwater valve;6, backwater pipe;7, one -way backflow device;8, backwater interface pipe;9, user end water supply device;10, fixed part. DETAILED DESCRIPTION

[0024] In order to make the utility model's purpose, technical scheme and advantage more clearly clear, following combining the drawing and example, the following will combine the drawing in the utility model example, and the technical scheme in the utility model example is clearly, completely described, obviously, the described example only is a part of the utility model example, but is not all the example. Based on the example in the utility model, all other examples that the person skilled in the art obtains without making the creative labor are within the scope of the utility model protection.

[0025] As Figures 1 to 4 Shown, a kind of air source heat pump water heater of automatic backwater, including air source heat pump water heater 1, air source heat pump water heater 1 includes water storage tank 3;

[0026] Hot water supply pipe 4, one end is connected with water storage tank 3, and the other end is connected with user end water supply device 9;

[0027] Temperature -controlled backwater valve 5, temperature -controlled backwater valve 5 is installed in the end of hot water supply pipe 4, for automatically controlling pipeline backwater according to water temperature;

[0028] Water return pipe 6, one end of water return pipe 6 is connected with temperature control water return valve 5, and the other end is connected with water return interface of water storage tank 3;

[0029] One-way backflow device 7, one-way backflow device 7 is arranged on water return pipe 6 and is used for preventing cold water from entering hot water supply pipe 4 in reverse direction;

[0030] Wherein, temperature control water return valve 5 and one-way backflow device 7 jointly realize that cold water in hot water pipeline automatically returns to water storage tank 3.

[0031] Water return pipe 6 is fixed on the outer surface of water storage tank 3 through fixing piece 10.

[0032] Temperature control water return valve 5 includes a bimetallic piece assembly, the bimetallic piece assembly is used for sensing the water temperature in hot water supply pipe 4, and when the water temperature is lower than the set value, temperature control water return valve 5 is driven to open, so that cold water flows into water return pipe 6.

[0033] One-way backflow device 7 is a mechanical one-way valve, the inlet end of the one-way valve is connected with water return pipe 6, the outlet end is connected with the water return interface of water storage tank 3, the one-way valve controls the opening and closing state through a mechanical spring, and the only water return direction is ensured.

[0034] The pipe diameter of water return pipe 6 is smaller than the pipe diameter of hot water supply pipe 4, so that the water return resistance is reduced and the water return efficiency is improved.

[0035] Air source heat pump water heater 1 further includes a water return interface pipe 8, the water return interface pipe 8 is arranged at the bottom of water storage tank 3, and the end of water return pipe 6 is connected with the water return interface pipe 8, so that cold water returns to the bottom of water storage tank.

[0036] Air source heat pump water heater 1 also includes a pressure balance pipe 2, the pressure balance pipe 2 is arranged between water return pipe 6 and one-way backflow device 7, and is used for balancing the water pressure in water return pipe 6 and the water pressure in water storage tank 3, so that the water return is smoothly carried out.

[0037] As Figures 1 to 4 As shown in the figure, in some actual applications, the structure of the utility model includes:

[0038] Air source heat pump water heater 1, including water storage tank 3;

[0039] Hot water supply pipe 4, used for delivering hot water to a user end;

[0040] Temperature control water return valve 5, arranged at the end of hot water supply pipe 4;

[0041] Water return pipe 6, connecting temperature control water return valve 5 and water return interface pipe 8 of water storage tank 3;

[0042] One-way backflow device 7, arranged on water return pipe 6, ensuring that the water flow direction is unique;

[0043] Pressure balance pipe 2 is used for balancing backwater pressure, and guarantees smooth backwater.

[0044] Working principle: when the water temperature in hot water supply pipe 4 is lower than the preset temperature, the bimetallic strip assembly is deformed due to temperature change, pushes the temperature control backwater valve 5 to open, and allows the cold water in the pipeline to flow into the backwater pipe 6. When the water temperature reaches the preset temperature, the bimetallic strip restores to the original state, closes the temperature control backwater valve 5, and stops the backwater process. When the water temperature in hot water supply pipe 4 is lower than the set temperature, the bimetallic strip assembly in the temperature control backwater valve 5 senses the temperature and is deformed, so that the temperature control backwater valve 5 is opened. The cold water in the pipeline flows into the backwater interface pipe 8 of the water storage tank 3 through the backwater pipe 6. The one-way backflow device 7 ensures that the cold water flow direction is unique, and prevents the cold water from flowing back to the hot water supply pipe 4 or the user end. When the backwater process is completed, the water temperature in the hot water supply pipe 4 gradually rises. The bimetallic strip assembly restores to the original state, closes the temperature control backwater valve 5, and the backwater process is completed. When the user opens the hot water faucet, the air source heat pump water heater 1 sends the heated water to the user end through the hot water supply pipe 4, and the hot water supply is normally carried out. Through the reasonable configuration of the temperature control backwater valve 5, the backwater pipe 6, the one-way backflow device 7 and the pressure balance pipe 2, the utility model effectively solves the problems of cold water waste and long waiting time of hot water in the water heater supply process, realizes the goals of automatic backwater, saving water resources and reducing system energy consumption, and has strong innovation and practicality.

[0045] In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, a specific orientation structure and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, "first", "second" is only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, "a plurality of" means two or more.

[0046] It should be noted that the standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings. The specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art. The mechanical parts and equipment adopt the conventional type in the prior art, and the inventor will not describe them in detail here.

[0047] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation" "link" "connection" and the like should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connects, can be two elements inside the intercommunication.For ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0048] The above has carried out detailed explanation to one embodiment of the utility model, but the content is only the preferred embodiment of the utility model, cannot be considered for limiting the implementation scope of the utility model. All equivalent changes and improvements made in the utility model application scope should still belong to the patent coverage scope of the utility model.

Claims

1. An air source heat pump water heater that can automatically return water, characterized by: The application relates to an air source heat pump water heater (1) which comprises a water storage tank (3). A hot water supply pipe (4) is connected at one end to the water storage tank (3) and at the other end to a user end water supply device (9). A temperature control backwater valve (5) is installed at the end of the hot water supply pipe (4) and is used for automatically controlling backwater according to water temperature. A backwater pipe (6) is connected at one end to the temperature control backwater valve (5) and at the other end to a backwater interface of the water storage tank (3). A one-way backflow device (7) is arranged on the backwater pipe (6) and is used for preventing cold water from entering the hot water supply pipe (4) in a reverse direction. The temperature control backwater valve (5) and the one-way backflow device (7) jointly realize automatic backflow of cold water in a hot water pipeline to the water storage tank (3). The temperature control backwater valve (5) comprises a bimetallic strip assembly which is used for sensing water temperature in the hot water supply pipe (4) and driving the temperature control backwater valve (5) to be opened when the water temperature is lower than a set value so that cold water flows into the backwater pipe (6).

2. The air source heat pump water heater of claim 1, wherein: The one-way backflow device (7) is a mechanical one-way valve, the inlet end of the one-way valve is connected to the backwater pipe (6), the outlet end is connected to the backwater interface of the water storage tank (3), and the one-way valve controls the opening and closing state through a mechanical spring, thereby ensuring that the backwater direction is unique.

3. The self-bleedable air source heat pump water heater according to claim 1, characterized in that: The pipe diameter of the backwater pipe (6) is smaller than that of the hot water supply pipe (4), so that backwater resistance is reduced and backwater efficiency is improved.

4. The self-bleedable air source heat pump water heater according to claim 1, characterized in that: The air source heat pump water heater (1) further comprises a backwater interface pipe (8) which is arranged at the bottom of the water storage tank (3), and the end of the backwater pipe (6) is connected to the backwater interface pipe (8), so that cold water backflows to the bottom of the water storage tank.

5. The self-bleedable air source heat pump water heater according to claim 1, characterized in that: The air source heat pump water heater (1) further comprises a pressure balance pipe (2) which is arranged between the backwater pipe (6) and the one-way backflow device (7) and is used for balancing water pressure in the backwater pipe (6) and water pressure in the water storage tank (3), thereby ensuring smooth backwater.

6. The self-bleedable air source heat pump water heater according to claim 1, characterized in that: ​

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