A heat pump water heater

Abstract

This utility model belongs to the technical field of heat pump water heaters, and more particularly to a heat pump water heater. It includes a heat pump main unit and an insulated water tank. The insulated water tank is connected to the corresponding interface of the heat pump main unit via a refrigerant connection pipe. Temperature sensors are installed at the top, middle, and bottom of the insulated water tank. A honeycomb ceramic guide plate is installed at the top inner part of the insulated water tank, and swirl aerators are distributed inside the tank. A fan compartment is located at the bottom of the insulated water tank, and a vortex fan is installed inside the fan compartment. This utility model features a honeycomb ceramic guide plate at the cold water inlet of the insulated water tank, allowing cold water to enter uniformly over a large area at a low speed, avoiding the formation of jets that penetrate the hot water layer and exacerbate stratification. The vortex fan and swirl aerators work together to generate a strong circulating aeration flow, driving the surrounding water to mix, helping to break up water stratification, promoting heat exchange between water layers of different temperatures, thereby reducing the temperature difference between the surface and bottom layers and promoting uniform water temperature.

Description

Technical Field

[0001] This utility model relates to the field of heat pump water heater technology, specifically a heat pump water heater. Background Technology

[0002] A heat pump water heater is a high-efficiency heat energy lifting and transfer device based on the reverse Carnot cycle. It uses a small amount of electricity as power and refrigerant as a carrier to continuously absorb low-grade heat energy from the air, convert it into usable high-grade heat energy, and then release the high-grade heat energy into the water that needs to be heated to produce domestic hot water, which is then delivered to users through hot water pipes.

[0003] Existing heat pump water heaters typically employ vertical water tanks to meet heat storage requirements and maximize space utilization. In the initial heating stage, heating causes the overall water temperature in the tank to rise. However, as heating time progresses, since the heating source is usually located at the bottom or side of the tank, the temperature at the bottom and side of the tank rises, causing the water to rise due to its lower density and forming a hot zone. The colder water, due to its higher density, sinks, resulting in a significant stratification of the water temperature within the water heater tank. This leads to unstable hot water supply, reduced effective capacity, decreased energy efficiency, accelerated equipment corrosion and deposits, and interference with the normal operation and control of the system.

[0004] Therefore, we propose a heat pump water heater to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a heat pump water heater that solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: A heat pump water heater includes a heat pump main unit and an insulated water tank. The insulated water tank is connected to the corresponding interface of the heat pump main unit through a refrigerant connection pipe. Temperature sensors are installed at the top, middle and bottom positions of the insulated water tank. A honeycomb ceramic baffle is installed at the top inner end of the insulated water tank. A swirl aerator is distributed inside the insulated water tank. A fan compartment is provided at the bottom of the insulated water tank. A vortex fan is installed in the fan compartment. The air inlet of the vortex fan is connected to an air filter through a pipe. The air outlet of the vortex fan is connected to the swirl aerator through a pipe. The heat pump unit includes a casing and a compressor. The compressor is installed in the casing, and a heat exchanger and an axial fan are installed in the casing. The heat exchanger is connected to the compressor through a capillary tube.

[0007] Furthermore, the insulated water tank includes a water tank shell, a polyurethane insulation layer, and a stainless steel inner liner. The polyurethane insulation layer and the stainless steel inner liner are sequentially installed in the water tank shell, and a heating coil is coiled around the outer side of the stainless steel inner liner.

[0008] Furthermore, the insulated water tank is provided with a working fluid inlet and a working fluid outlet, with the working fluid inlet connected to one end of the heating coil and the working fluid outlet connected to the other end of the heating coil.

[0009] Furthermore, the heat pump unit has an upper interface and a lower interface on its side wall, with the upper interface connected to the working fluid inlet via a refrigerant connection pipe and the lower interface connected to the working fluid outlet via a refrigerant connection pipe.

[0010] Furthermore, the upper interface is connected to the compressor via a pipe, and the lower interface is connected to the heat exchanger via a pipe.

[0011] Furthermore, the swirl aerator corresponds to the position of the temperature sensing probe, and a strip-shaped heat-conducting plate is soldered onto the heating coil, with the other side of the strip-shaped heat-conducting plate attached to the outer wall of the pipe connecting the vortex blower and the swirl aerator.

[0012] Furthermore, the insulated water tank has a cold water inlet at the top and a hot water outlet at the top.

[0013] Furthermore, a drain outlet is installed at the bottom of the insulated water tank, and a safety valve is installed at the top of the insulated water tank. Ventilation openings are provided on the outer wall of the fan compartment.

[0014] Compared with the prior art, this utility model provides a heat pump water heater with the following advantages: This invention features a honeycomb ceramic guide plate at the cold water inlet of the insulated water tank, allowing cold water to enter at a low speed and over a large area, preventing jets from penetrating the hot water layer and exacerbating stratification. The combination of a vortex blower and a vortex aerator generates a strong circulating flow of aeration, which mixes the surrounding water, helps to break up water stratification, promotes heat exchange between water layers of different temperatures, thereby reducing the temperature difference between the surface and bottom layers and promoting uniform water temperature. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the heat pump main unit of this utility model; Figure 3 This is a cross-sectional view of the insulated water tank of this utility model.

[0016] In the diagram: 1. Heat pump main unit; 11. Casing; 12. Compressor; 13. Heat exchanger; 14. Axial fan; 15. Upper interface; 16. Lower interface; 2. Insulated water tank; 21. Temperature probe; 22. Honeycomb ceramic baffle plate; 23. Cyclone aerator; 24. Fan compartment; 25. Vortex fan; 26. Air filter; 27. Water tank outer shell; 28. Polyurethane insulation layer; 29. ​​Stainless steel inner liner; 210. Heating coil; 211. Working fluid inlet; 212. Working fluid outlet; 213. Strip heat conduction plate; 214. Cold water inlet; 215. Hot water outlet; 216. Drain outlet; 217. Safety valve; 218. Ventilation vent. Detailed Implementation

[0017] 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 protection scope of the present utility model. Example

[0018] like Figures 1-3 As shown in the figure, an embodiment of the present invention discloses a heat pump water heater, including a heat pump host 1 and an insulated water tank 2. The insulated water tank 2 is connected to the corresponding interface of the heat pump host 1 through a refrigerant connection pipe, and temperature sensors 21 are installed at the top, middle and bottom positions of the insulated water tank 2. A honeycomb ceramic guide plate 22 is installed at the top inner end of the insulated water tank 2, and swirl aerators 23 are distributed inside the insulated water tank 2. A fan compartment 24 is provided at the bottom of the insulated water tank 2, and a vortex fan 25 is installed inside the fan compartment 24. The air inlet of the vortex fan 25 is connected to a pipe. An air filter 26 is connected, and the outlet of the vortex blower 25 is connected to the swirl aerator 23 through a pipe. A honeycomb ceramic guide plate 22 is installed at the cold water inlet 214 of the insulated water tank 2, so that the cold water enters at a low speed and over a large area evenly, avoiding the formation of jets that penetrate the hot water layer and aggravate stratification. The vortex blower 25 and the swirl aerator 23 work together to generate a strong circulating flow of aeration, which drives the surrounding water to mix, helps to break the water stratification phenomenon, promotes heat exchange between water layers of different temperatures, thereby reducing the temperature difference between the surface and bottom layers and promoting uniform water temperature. The heat pump host 1 includes a housing 11 and a compressor 12. The compressor 12 is installed in the housing 11. A heat exchanger 13 and an axial fan 14 are installed in the housing 11. The heat exchanger 13 is connected to the compressor 12 through a capillary tube.

[0019] like Figure 3As shown, in some embodiments, the insulated water tank 2 includes a water tank shell 27, a polyurethane insulation layer 28, and a stainless steel inner liner 29. The polyurethane insulation layer 28 and the stainless steel inner liner 29 are sequentially installed in the water tank shell 27. A heating coil 210 is coiled around the outside of the stainless steel inner liner 29. The insulated water tank 2 is composed of a multi-layer composite material consisting of the water tank shell 27, the polyurethane insulation layer 28, and the stainless steel inner liner 29, which can effectively reduce heat conduction loss.

[0020] like Figure 3 As shown, in some embodiments, the insulated water tank 2 is provided with a working fluid inlet 211 and a working fluid outlet 212. The working fluid inlet 211 is connected to one end of the heating coil 210, and the working fluid outlet 212 is connected to the other end of the heating coil 210. The working fluid inlet 211 and the working fluid outlet 212 are used to connect to the heat pump host 1 through a refrigerant connection pipe.

[0021] like Figure 2 As shown, in some embodiments, the heat pump host 1 is provided with an upper interface 15 and a lower interface 16 on its side wall. The upper interface 15 is connected to the working fluid inlet 211 through a refrigerant connection pipe, and the lower interface 16 is connected to the working fluid outlet 212 through a refrigerant connection pipe. The upper interface 15 and the lower interface 16 are used to connect to the insulated water tank 2 through the refrigerant connection pipe.

[0022] like Figure 2 As shown, in some embodiments, the upper interface 15 is connected to the compressor 12 via a pipe, and the lower interface 16 is connected to the heat exchanger 13 via a pipe. After the heat pump water heater is powered on, it absorbs low-temperature heat energy from the ambient heat source (such as water or air), and then converts it into higher-temperature heat energy and releases it into the circulating medium (such as water or air) as a high-temperature heat source output. Here, the operation of the compressor 12 consumes electrical energy. The operation of the compressor 12 causes the continuously circulating refrigerant to produce different states and effects in different systems (i.e., evaporation heat absorption and condensation heat release), thereby achieving the function and purpose of recovering low-temperature heat sources to produce high-temperature heat sources. The generated heat energy is exchanged between the self-heating coil 210 and the water in the inner tank.

[0023] like Figure 3 As shown, in some embodiments, the swirl aerator 23 corresponds to the position of the temperature sensor 21. A strip-shaped heat-conducting plate 213 is soldered onto the heating coil 210, and the other side of the strip-shaped heat-conducting plate 213 is attached to the outer wall of the pipe connecting the vortex blower 25 and the swirl aerator 23. Through the heat conduction of the strip-shaped heat-conducting plate 213, the pipe connecting the vortex blower 25 and the swirl aerator 23 can be preheated to improve the heat utilization rate.

[0024] like Figure 3As shown, in some embodiments, the top of the insulated water tank 2 is provided with a cold water inlet 214, and the upper part of the insulated water tank 2 is provided with a hot water outlet 215. The cold water inlet 214 is used to connect to the tap water supply system through a pipeline, and the hot water outlet 215 is used to connect to the hot end equipment through a pipeline.

[0025] like Figure 1 As shown, in some embodiments, a drain port 216 is installed at the bottom of the insulated water tank 2, and a safety valve 217 is installed at the top of the insulated water tank 2. A ventilation port 218 is provided on the outer wall of the fan compartment 24. The drain port 216 is used to clean the insulated water tank 2 regularly. The safety valve 217 is a special valve that is normally closed under the action of external force. When the pressure of the medium in the equipment or pipeline rises above the specified value, it discharges the medium to the outside of the system to prevent the pressure of the medium in the pipeline or equipment from exceeding the specified value. It belongs to the category of automatic valves. The ventilation port 218 is for the convenience of the operation of the vortex fan 25.

[0026] During use, a honeycomb ceramic guide plate 22 is installed at the cold water inlet 214 of the insulated water tank 2, so that the cold water enters at a low speed and over a large area evenly, avoiding the formation of jets that penetrate the hot water layer and aggravate stratification. The strong circulating flow of aeration is generated by the vortex blower 25 and the vortex aerator 23 (the periodic outflow of aeration will disturb the water body and form internal waves, which are propagated through vertical oscillation and lateral movement), which drives the surrounding water body to mix, which helps to break the water stratification phenomenon, promotes heat exchange between water layers of different temperatures, thereby reducing the temperature difference between the surface and bottom layers and promoting water temperature uniformity.

[0027] In summary, a honeycomb ceramic guide plate 22 is installed at the cold water inlet 214 of the insulated water tank 2, so that the cold water enters at a low speed and over a large area evenly, avoiding the formation of jets that penetrate the hot water layer and aggravate stratification. The strong circulating flow of aeration generated by the vortex fan 25 and the vortex aerator 23 drives the surrounding water to mix, which helps to break the water stratification phenomenon, promotes heat exchange between water layers of different temperatures, thereby reducing the temperature difference between the surface and bottom layers and promoting water temperature uniformity.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat pump water heater, comprising a heat pump unit (1) and an insulated water tank (2), characterized in that: The insulated water tank (2) is connected to the corresponding interface of the heat pump host (1) through a refrigerant connection pipe, and temperature probes (21) are installed at the upper, middle and lower positions of the insulated water tank (2). A honeycomb ceramic guide plate (22) is installed at the top inner end of the insulated water tank (2), and swirl aerators (23) are distributed inside the insulated water tank (2). A fan compartment (24) is provided at the bottom of the insulated water tank (2), and a vortex fan (25) is installed inside the fan compartment (24). An air filter (26) is connected to the air inlet of the vortex fan (25) through a pipe, and the air outlet of the vortex fan (25) is connected to the swirl aerator (23) through a pipe. The heat pump host (1) includes a housing (11) and a compressor (12). The compressor (12) is installed in the housing (11). A heat exchanger (13) and an axial fan (14) are installed in the housing (11). The heat exchanger (13) is connected to the compressor (12) through a capillary tube.

2. A heat pump water heater as set forth in claim 1 wherein: The insulated water tank (2) includes a water tank shell (27), a polyurethane insulation layer (28) and a stainless steel inner liner (29). The polyurethane insulation layer (28) and the stainless steel inner liner (29) are installed in the water tank shell (27) in sequence. A heating coil (210) is coiled around the outside of the stainless steel inner liner (29).

3. A heat pump water heater as set forth in claim 2 wherein: The insulated water tank (2) is provided with a working fluid inlet (211) and a working fluid outlet (212), and the working fluid inlet (211) is connected to one end of the heating coil (210), and the working fluid outlet (212) is connected to the other end of the heating coil (210).

4. A heat pump water heater as set forth in claim 3 wherein: The heat pump host (1) has an upper interface (15) and a lower interface (16) on its side wall. The upper interface (15) is connected to the working fluid inlet (211) through a refrigerant connection pipe, and the lower interface (16) is connected to the working fluid outlet (212) through a refrigerant connection pipe.

5. A heat pump water heater as set forth in claim 4 wherein: The upper interface (15) is connected to the compressor (12) via a pipe, and the lower interface (16) is connected to the heat exchanger (13) via a pipe.

6. A heat pump water heater as set forth in claim 2 wherein: The swirl aerator (23) corresponds to the position of the temperature probe (21). A strip heat-conducting plate (213) is soldered onto the heating coil (210), and the other side of the strip heat-conducting plate (213) is attached to the outer wall of the pipe connecting the vortex blower (25) and the swirl aerator (23).

7. A heat pump water heater as set forth in claim 1 wherein: The insulated water tank (2) has a cold water inlet (214) at the top and a hot water outlet (215) at the top.

8. A heat pump water heater as set forth in claim 1 wherein: The lower part of the insulated water tank (2) is equipped with a drain outlet (216), and the top of the insulated water tank (2) is equipped with a safety valve (217). The outer wall of the fan compartment (24) is provided with a ventilation opening (218).

Images