Air source heat pump household water heater

Abstract

This utility model discloses a household integrated air-source heat pump water heater, including a casing and a top cover. The casing houses a condensate tank and a condensate coil, with the condensate coil wound around the outer wall of the condensate tank. An air-source heat pump assembly is detachably mounted on the upper surface of the casing, connected to the condensate coil. The top cover is installed on the upper surface of the casing and covers the air-source heat pump assembly. This design employs a modular, layered layout, reducing pipe connections, saving installation space, eliminating the need for separate adjustments, and lowering the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the field of heat pump system technology, specifically to an air source heat pump household integrated water heater. Background Technology

[0002] An air source heat pump is an energy-saving device that utilizes high-grade energy to transfer heat from a low-grade heat source (air) to a high-grade heat source. Currently, the most common type on the market is the split-type direct-heating air source water heater, which separates the main unit and the insulated water tank. This involves installing the main unit (outdoor unit) separately from the drying chamber or water tank, requiring the connection and fixing of indoor and outdoor pipes. This process necessitates a professional installation team, leading to extended installation time and increased labor costs. Furthermore, split-type heat pumps have the following disadvantages: 1. In low-temperature environments (such as below -5℃), heating efficiency is significantly reduced, and frequent defrosting increases energy consumption. Some low-temperature heat pumps can alleviate this problem through vapor injection enthalpy enhancement technology, but overall energy consumption may still increase. 2. If the water circulation system of a split-type unit has many pipe connection points or uses poor-quality materials (such as inferior PPR pipes), leaks may occur due to installation problems, making repairs difficult, especially in ceiling-mounted or concealed installations. 3. Split-type heat pump units are usually more expensive than ordinary air conditioning equipment, and require the use of terminal equipment (such as underfloor heating and fan coil units). The overall installation cost may be higher than that of integrated or other heating solutions. Utility Model Content

[0003] To address the aforementioned issues, this invention provides an air-source heat pump household water heater that saves installation space, simplifies the installation process, and reduces the risk of leakage.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: an air source heat pump household water heater, including a casing and a top cover. The casing contains a condensate tank and a condensate coil, with the condensate coil wound around the outer wall of the condensate tank. An air source heat pump assembly is detachably installed on the upper surface of the casing, and the air source heat pump assembly is connected to the condensate coil. The top cover is installed on the upper surface of the casing and can cover the air source heat pump assembly. This solution adopts a modular layout with upper and lower layers, reducing pipe connections, saving installation space, simplifying the installation process (no need for separate debugging), and reducing the risk of leakage.

[0005] Furthermore, the air source heat pump assembly includes a compressor, an evaporator, a four-way valve, and an expansion valve. The evaporator, compressor, four-way valve, condenser coil, and expansion valve are connected sequentially to form a closed loop, creating a heat pump cycle system. When the liquid refrigerant flows through the evaporator, it absorbs low-temperature heat from the air and evaporates into a low-temperature, low-pressure gas. This low-temperature, low-pressure gaseous refrigerant is then compressed by the compressor into a high-temperature, high-pressure gas (temperatures can reach above 80°C), consuming electrical energy to improve its heat energy quality. The high-temperature, high-pressure refrigerant enters the condenser coil wrapped around the inner liner of the condensate tank, releasing heat to the water and condensing into a high-pressure liquid. The high-pressure liquid refrigerant is then throttled and depressurized by the expansion valve, returning to a low-temperature, low-pressure state before re-entering the evaporator to begin the next cycle. The four-way valve switches between cooling and heating modes by changing the refrigerant flow direction.

[0006] Furthermore, the air source heat pump assembly also includes a controller that electrically controls the compressor, four-way valve, and expansion valve.

[0007] Furthermore, an evaporator sealing plate seat is installed on the upper surface of the chassis, and a sealed space for installing the evaporator is formed inside the evaporator sealing plate seat. An air outlet communicating with the sealed space is formed on the evaporator sealing plate seat, and a fan is installed at the air outlet.

[0008] Furthermore, the evaporator is a finned evaporator.

[0009] Furthermore, the air outlet is located on the side wall of the evaporator sealing plate seat, and the fan is a volute centrifugal single-inlet fan.

[0010] Furthermore, the top cover is provided with several heat dissipation holes to facilitate the evaporator's absorption of heat from the air.

[0011] Furthermore, the compressor is a low-noise compressor, such as a silent air compressor, suitable for applications requiring ultra-low noise. A compressor cover is also installed on the upper surface of the casing, enclosing the compressor. The inner wall of the compressor cover is lined with sound-absorbing cotton, which protects the compressor and reduces noise, ensuring it will not disrupt the customer's daily life when used indoors.

[0012] The beneficial effects of this utility model are: This solution integrates the compressor, evaporator, condenser, water tank and control system into a single shell, with a modular layout (layered design), reducing pipe connections, and ensuring that each component does not interfere with each other, leaving space for pipe layout. This can save installation space (reduce the floor area by 30%-50%), simplify the installation process (no need for separate debugging), and reduce the risk of water leakage. Attached Figure Description

[0013] Figure 1 This is an exploded view of the overall structure of this utility model; Figure 2 This is a three-dimensional structural view of the present invention (default top cover and compressor cover); Figure 3 This is a three-dimensional structural view of the present invention (top cover is omitted). Figure 4 This is a cross-sectional view of the structure of this utility model; Figure 5 This is a partially enlarged schematic diagram of the compressor's structural installation position from a top view. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings. In the drawings, the arrows indicate the direction of refrigerant flow.

[0015] Air source heat pump household water heater, such as Figures 1-5As shown, the device includes a chassis 1 and a top cover 2. The chassis 1 is equipped with a condensate tank and a condensate coil 11. The condensate coil 11 is wound around the outer wall of the condensate tank. The inlet and outlet of the condensate coil 11 extend out of the upper surface of the chassis 1 for easy connection. An air-source heat pump assembly is detachably installed on the upper surface of the casing 1. The air-source heat pump assembly includes a controller 25, a compressor 21, an evaporator 22, a four-way valve assembly 23, and an electronic expansion valve assembly 24. The four-way valve assembly 23 consists of a four-way valve and a preset pipe, and the electronic expansion valve assembly 24 consists of an electronic expansion valve and a preset pipe. The evaporator 22, compressor 21, four-way valve assembly 23, condenser coil 11, and electronic expansion valve assembly 24 are connected in sequence to form a closed loop, forming a heat pump circulation system. When the liquid refrigerant flows through the evaporator 22, it absorbs low-temperature heat from the air and evaporates into a low-temperature, low-pressure gas. The low-temperature, low-pressure gaseous refrigerant is compressed by the compressor 21 into a high-temperature, high-pressure gas (temperature can reach above 80°C), consuming electrical energy to improve the heat energy quality. The high-temperature, high-pressure refrigerant enters the condenser coil 11 wrapped around the inner liner of the condensate tank, releases heat to the water, and condenses into a high-pressure liquid. The high-pressure liquid refrigerant is throttled and depressurized by the expansion valve, returning to a low-temperature, low-pressure state, and re-enters the evaporator 22 to start the next cycle. The four-way valve switches between cooling and heating modes by changing the refrigerant flow direction. The top cover is installed on the upper surface of the chassis and covers all the air-source heat pump components. The compressor 21 is mounted on a base plate 20, which is detachably mounted on the upper surface of the chassis using screws. An evaporator sealing plate seat 220 is also installed on the base plate 20. The evaporator sealing plate seat 220 forms a sealed space for installing the evaporator 22. An air outlet communicating with the sealed space is formed on the evaporator sealing plate seat 220, and a fan 26 is installed at the air outlet. A controller 25 is mounted on the other side of the evaporator sealing plate seat 220 via a bracket. The controller 25 electrically controls the compressor 21, the four-way valve, the electronic expansion valve, and the fan 26.

[0016] Furthermore, the evaporator adopts a 3-row finned evaporator, which has a higher heat exchange rate.

[0017] Furthermore, the air outlet is located on the side wall of the evaporator sealing plate seat 220, and the fan 26 is a volute centrifugal single-inlet fan.

[0018] Furthermore, the top cover is provided with several heat dissipation holes to facilitate the evaporator's absorption of heat from the air.

[0019] Furthermore, the compressor 21 is a low-noise compressor, such as a silent air compressor, suitable for applications requiring ultra-low noise. A compressor cover 210 is also installed on the base plate 20, which encloses the compressor 21. The inner wall of the compressor cover 210 is lined with a layer of sound-absorbing cotton, which protects the compressor and reduces noise, ensuring it will not disrupt the customer's daily life when used indoors.

[0020] This solution employs a modular design with a detachable base plate 20, evaporator sealing plate seat 220, fan assembly, electrical control assembly, four-way valve assembly, expansion valve assembly, and evaporator assembly. This allows for the free disassembly of key components, integrating the compressor 21, evaporator 22, condenser coil 11, water tank, and controller 25 into a single housing. The layered modular layout reduces pipe connections, ensuring that each component operates independently and allowing for sufficient space for piping. This saves installation space (reducing floor area by 30%-50%), simplifies the installation process (eliminating the need for separate unit adjustments), and reduces the risk of leaks. Furthermore, this solution optimizes the condensate drainage path and drip tray size, facilitating dust cleaning and radiator fan maintenance, and extending equipment lifespan. This design employs a volute centrifugal single-inlet fan with side air intake and side installation. The inlet and evaporator form a sealed space. The fan draws air from one side of the evaporator through the inlet, carrying away heat, and then exhausts the heat through the outlet of fan 26. The outlet of fan 26 can be guided by an air guide ring to optimize the evaporator's heat dissipation. This design uses a low-noise compressor with a spare compressor sheet metal cover and employs high-efficiency compressor sound-absorbing cotton, minimizing the noise of the integrated unit and ensuring it won't disrupt the customer's daily life indoors. This design optimizes the process flow, incorporating assembly processes such as compressor and other component installation → pipe assembly welding → pipe welding → electrical control wiring, along with halogen and water testing processes, to better protect components and improve assembly efficiency. This design uses refrigerant to directly heat the water tank, reducing heat loss and extending the insulation time.

[0021] The above description is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the scope of the present utility model patent application and the description of the utility model shall still fall within the scope of the present utility model patent.

Claims

1. A household integrated air source heat pump water heater, characterized in that, The device includes a chassis and a top cover. The chassis contains a condensate tank and a condensate coil, with the condensate coil wound around the outer wall of the condensate tank. An air source heat pump assembly is detachably mounted on the upper surface of the chassis and is connected to the condensate coil. The top cover is mounted on the upper surface of the chassis and can cover the air source heat pump assembly.

2. The air source heat pump household water heater according to claim 1, characterized in that, The air source heat pump assembly includes a compressor, an evaporator, a four-way valve, and an expansion valve. The evaporator, compressor, four-way valve, condenser coil, and expansion valve are connected to form a heat pump circulation loop.

3. The air source heat pump household water heater according to claim 2, characterized in that, The air source heat pump assembly also includes a controller that electrically controls the compressor, four-way valve, and expansion valve.

4. The air source heat pump household water heater according to claim 3, characterized in that, An evaporator sealing plate seat is installed on the upper surface of the chassis. A sealed space for installing the evaporator is formed inside the evaporator sealing plate seat. An air outlet communicating with the sealed space is formed on the evaporator sealing plate seat. A fan is installed at the air outlet. The controller electrically controls the fan.

5. The air-source heat pump household water heater according to claim 2 or 4, characterized in that, The evaporator is a finned evaporator.

6. The air source heat pump household water heater according to claim 4, characterized in that, The air outlet is located on the side wall of the evaporator sealing plate seat, and the fan is a volute centrifugal single-inlet fan.

7. The air source heat pump household water heater according to claim 1, characterized in that, The top cover is provided with several heat dissipation holes.

8. The air source heat pump household water heater according to claim 2, characterized in that, The compressor is a low-noise compressor.

9. The air-source heat pump household water heater according to claim 2 or 8, characterized in that, The upper surface of the chassis is also equipped with a compressor cover, which covers the compressor, and the inner wall of the compressor cover is provided with a layer of sound-absorbing cotton.

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