Water heater

Abstract

The utility model relates to the technical field of water heaters, in particular to a water heater which comprises a heat pump system, a control device and a water tank, the water tank comprises a shell, an inner container and a heat preservation layer filled between the shell and the inner container, the lower portion of one side of the inner container is connected with a water inlet pipe, and the upper portion of the other side of the inner container is connected with a water outlet pipe. A heating assembly and a heat insulation layer are arranged on the section, extending out of the water tank, of the water inlet pipe, and the heat insulation layer wraps the water inlet pipe and the heating assembly. According to the air energy water heater, the heating assembly and the heat insulation layer are arranged on the water inlet pipe so that preheating and heat preservation can be conducted on the water inlet pipe, and the problem that in the cold environment, the water inlet pipe is frozen, and water cannot be injected into the inner container, and consequently dry burning occurs is solved.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a water heater. Background Technology

[0002] Air source heat pump water heaters are devices that use the heat pump principle to absorb heat from the air to produce hot water. Their power consumption is typically only one-quarter that of electric water heaters, making them energy-efficient, environmentally friendly, and safer to use compared to traditional and electric water heaters. However, existing air source heat pump water heaters do not have good antifreeze properties at the inlet pipe, especially in cold northern regions, where the inlet pipe often freezes, preventing normal water filling and potentially causing the air source heat pump water heater to dry-burn and resulting in safety accidents. Utility Model Content

[0003] To achieve the above objectives, this utility model provides a water heater, including a heat pump system, a control device, and a water tank. The water tank includes an outer shell, an inner tank, and an insulation layer filled between the outer shell and the inner tank. A water inlet pipe is connected to the lower part of one side of the inner tank, and a water outlet pipe is connected to the upper part of the other side. A heating element and a heat insulation layer are provided on a section of the water inlet pipe extending outside the water tank. The heat insulation layer covers the water inlet pipe and the heating element.

[0004] In some possible embodiments, the heating component is a heating element wrapped around the outer wall of the water inlet pipe.

[0005] In some possible embodiments, a heating coil is provided inside the inner tank, and both ends of the heating coil are connected to an external heat pump system. The heating component is an auxiliary heating tube wrapped around the outer wall of the water inlet pipe, and both ends of the auxiliary heating tube are connected to the heating coil.

[0006] In some possible embodiments, a first electrically controlled valve is also provided between the heating coil and the auxiliary heating tube, and a temperature sensor is provided on the outer wall of the water inlet pipe or inside the water inlet pipe. Both the first electrically controlled valve and the temperature sensor are connected to the control device.

[0007] In some possible embodiments, the heating coil is located on the upper part of the inner tank and near the water outlet pipe.

[0008] In some possible embodiments, an electrically assisted heating rod is also inserted through the bottom of the inner liner.

[0009] In some possible embodiments, the heating component is an auxiliary heating tube wound around the outer wall of the water inlet pipe. The auxiliary heating tube is connected to the heat pump system, and a second electrically controlled valve is provided between the auxiliary heating tube and the heat pump system. Both the electric auxiliary heating rod and the second electrically controlled valve are controlled by the control device.

[0010] In some possible embodiments, there are at least two inner tanks and all of the inner tanks are arranged side by side. All of the inner tanks are connected in series by a drain pipe. The inlet end of the drain pipe is connected to the top of one of the inner tanks, and the outlet end extends from the top of the other inner tank to the bottom of that inner tank.

[0011] In some possible embodiments, the lower end of the drainage tube that penetrates the inner liner portion is needle-shaped.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The air source water heater of this utility model is equipped with a heating component and a heat insulation layer on the water inlet pipe to preheat and keep the water inlet pipe warm, so as to avoid the problem of dry burning caused by the water inlet pipe freezing in cold environment and being unable to inject water into the inner tank. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the internal structure of an air source water heater provided in the first embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of an air source water heater provided in the second embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram of the internal structure of an air source water heater provided in the third embodiment of the present invention.

[0017] The following are the reference numerals: 1. Outer shell; 2. Insulation layer; 3. Inner liner; 4. Heating coil; 5. Drainage pipe; 6. Heating component; 61. Heating tube; 62. Auxiliary heating tube; 63. Insulation layer; 7. First electric control valve; 8. Electric auxiliary heating rod; 9. Water inlet pipe; 10. Water outlet pipe; 11. Second electric control valve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0019] Reference Figure 1 and Figure 2 The water heater shown includes a heat pump system (not shown), a control device (not shown), and a water tank. The water tank includes an outer shell 1, an inner tank 3, and an insulation layer 2 filled between the outer shell 1 and the inner tank 3. The inner tank 3 can be made of a heat-resistant and corrosion-resistant plastic material with a temperature resistance of 60℃ or higher, such as PPR plastic material injection molding. The insulation layer 2 can be made of polyurethane foam material. A water inlet pipe 9 is connected to the lower part of one side of the inner tank 3, and a water outlet pipe 10 is connected to the upper part of the other side. The water inlet pipe 9 is connected to an external cold water pipe, such as a municipal tap water pipe, and the water outlet pipe 10 is connected to the hot water supply pipe of the household water system. A heating element 6 and a heat insulation layer 63 are installed on the section of the water inlet pipe 9 extending outside the water tank. The heat insulation layer 63 covers the water inlet pipe 9 and the heating element 6 inside, that is, the heating element 6 is installed on the outer wall of the water inlet pipe 9, and the heat insulation layer 63 covers both the water inlet pipe 9 and the heating element 6 to prevent them from contacting the outside and exchanging heat. The air source water heater of this utility model preheats and insulates the water inlet pipe 9 by setting a heating component 6 and a heat insulation layer 63 at the water inlet pipe 9, effectively preventing the water inlet pipe 9 from freezing in cold environments, avoiding the problem of dry burning caused by cold water not being able to be injected into the inner tank 3, and ensuring the normal operation of the air source water heater.

[0020] In some possible embodiments, refer to Figure 1 As shown, the heating component 6 is a heating tape 61 wrapped around the outer wall of the water inlet pipe 9. The heating tape 61 is connected to the control device, which controls the heating tape 61 to turn on or off. For example, when the ambient temperature drops to a certain threshold, the control device controls the heating tape 61 to start so as to effectively heat the water in the water inlet pipe 9, prevent the water pipe from freezing in the cold environment, and ensure the normal operation of the air source water heater.

[0021] In some possible embodiments, refer to Figure 2As shown, a heating coil 4 is installed inside the inner tank 3, with both ends of the heating coil 4 connected to an external heat pump system. The heating component 6 is an auxiliary heating tube 62 wound around the outer wall of the water inlet pipe 9, with both ends of the auxiliary heating tube 62 connected to the heating coil 4. The high-temperature medium provided by the heat pump system flows within the heating coil 4 to heat the water in the inner tank 3. The high-temperature medium also flows through the auxiliary heating tube 62 via the heating coil 4 to heat the water in the water inlet pipe 9, effectively preventing the water inlet pipe 9 from freezing. In this embodiment, a heat pump system is used to provide heat to prevent the water inlet pipe 9 from freezing, eliminating the need for a separate heating structure, resulting in a relatively simple structural design.

[0022] In some possible embodiments, refer to Figure 2 As shown, a first electrically controlled valve 7 is also provided between the heating coil 4 and the auxiliary heating tube 62. This first electrically controlled valve 7 can be a three-way valve connecting the front and rear ends of the heating coil 4 and the auxiliary heating tube 62, or it can be a two-way valve installed on the auxiliary heating tube 62. Opening the first electrically controlled valve 7 allows the high-temperature medium in the heating coil 4 to flow through the auxiliary heating tube 62, thereby heating the water in the inlet pipe 9. Furthermore, a temperature sensor (not shown) is installed on the outer wall or inside the inlet pipe 9. Both the first electrically controlled valve 7 and the temperature sensor are connected to the control device. The temperature sensor can monitor the water temperature in the inlet pipe 9 in real time, and the control device controls the opening and closing of the first electrically controlled valve 7 based on the temperature signal, thereby controlling the opening and closing of the first electrically controlled valve 7 and achieving precise temperature control.

[0023] In some possible embodiments, refer to Figure 1 and Figure 2 As shown, the heating coil 4 is located on the upper part of the inner tank 3 and close to the water outlet pipe 10. This arrangement allows the water near the water outlet pipe 10 to be heated first, achieving the effect of rapid water heating.

[0024] In some possible embodiments, refer to Figure 1 and Figure 2 As shown, an electric auxiliary heating rod 8 is also installed at the bottom of the inner tank 3. The electric auxiliary heating rod 8 can provide additional heating support when the heat pump system of the air source water heater fails or in extremely cold environments, ensuring that users can use hot water normally. When the ambient temperature is below 10°C, the control device controls the electric auxiliary heating rod 8 to turn on and heat the water in the inner tank 3 to ensure the heating efficiency of the water heater. When the ambient temperature is above 10°C, the electric auxiliary heating rod 8 stops working, and heating can be carried out by the heat pump system alone to reduce energy consumption.

[0025] In some possible embodiments, refer to Figure 3As shown, the heating component 6 is an auxiliary heating tube 62 wound around the outer wall of the water inlet pipe 9, and the auxiliary heating tube 62 is connected to the heat pump system. A second electrically controlled valve 11 is provided between the auxiliary heating tube 62 and the heat pump system. Both the electric auxiliary heating rod 8 and the second electrically controlled valve 11 are controlled by the control device. In this embodiment, the auxiliary heating tube 62 is directly connected to the heat pump system. In cold environments, such as when the temperature is below 10°C, the heat generated by the heat pump system can be directly supplied to, and only needs to be supplied to, the auxiliary heating tube 62, ensuring that the auxiliary heating tube 62 can provide sufficient heat to prevent the water inlet pipe 9 from freezing. The electric auxiliary heating rod 8 heats the water in the inner tank 3. That is, in this embodiment, the heat pump system and the electric auxiliary heating rod 8 cooperate with each other to ensure that the water heater can operate normally and stably.

[0026] In some possible embodiments, refer to Figure 1 and Figure 2 As shown, there are at least two inner tanks 3, and all inner tanks 3 are arranged side by side. All inner tanks 3 are connected in series via a drain pipe 5. The inlet end of the drain pipe 5 is connected to the top of one of the inner tanks 3, and the outlet end extends from the top of the other inner tank 3 to its bottom. This multi-tank structure not only increases the capacity of the water heater but also enables progressive water replenishment, thereby eliminating the problem of hot and cold water mixing and improving the hot water utilization rate.

[0027] In some possible embodiments, refer to Figure 1 and Figure 2 As shown, the lower end of the drainage tube 5 that penetrates into the inner tank 3 is needle-shaped. This design can reduce the resistance of water flow when entering the inner tank 3, making the water flow smoother. At the same time, it can flush away water impurities at the bottom of the inner tank 3, preventing water impurities from accumulating and forming scale.

[0028] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A water heater, comprising a heat pump system, a control device, and a water tank, characterized in that, The water tank includes an outer shell (1), an inner liner (3), and a heat insulation layer (2) filled between the outer shell (1) and the inner liner (3). A water inlet pipe (9) is connected to the lower part of one side of the inner liner (3), and a water outlet pipe (10) is connected to the upper part of the other side. A heating component (6) and a heat insulation layer (63) are provided on a section of the water inlet pipe (9) extending outside the water tank. The heat insulation layer (63) covers the water inlet pipe (9) and the heating component (6).

2. A water heater according to claim 1, characterized in that, The heating component (6) is a heating element (61) wrapped around the outer wall of the water inlet pipe (9).

3. A water heater according to claim 1, characterized in that, The inner liner (3) is provided with a heating coil (4), and both ends of the heating coil (4) are connected to an external heat pump system. The heating component (6) is an auxiliary heating tube (62) wrapped around the outer wall of the water inlet pipe (9), and both ends of the auxiliary heating tube (62) are connected to the heating coil (4).

4. A water heater according to claim 3, characterized in that, A first electrically controlled valve (7) is also provided between the heating coil (4) and the auxiliary heating tube (62). A temperature sensor is provided on the outer wall of the water inlet pipe (9) or inside the water inlet pipe (9). The first electrically controlled valve (7) and the temperature sensor are both connected to the control device.

5. A water heater according to claim 3 or 4, characterized in that, The heating coil (4) is located on the upper part of the inner tank (3) and near the water outlet pipe (10).

6. A water heater according to claim 1, characterized in that, An electric auxiliary heating rod (8) is also installed at the bottom of the inner liner (3).

7. A water heater according to claim 6, characterized in that, The heating component (6) is an auxiliary heating tube (62) wrapped around the outer wall of the water inlet pipe (9). The auxiliary heating tube (62) is connected to the heat pump system. A second electric control valve (11) is provided between the auxiliary heating tube (62) and the heat pump system. Both the electric auxiliary heating rod (8) and the second electric control valve (11) are controlled by the control device.

8. A water heater according to claim 1, characterized in that, There are at least two inner liner (3) and all the inner liner (3) are arranged side by side. All the inner liner (3) are connected in series through a drain pipe (5). The water inlet end of the drain pipe (5) is connected to the top of one of the inner liner (3), and the water outlet end extends from the top of the other inner liner (3) to the bottom of the inner liner (3).

9. A water heater according to claim 8, characterized in that, The lower end of the drainage tube (5) that penetrates the inner liner (3) is needle-shaped.

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