An outdoor unit of a heat pump water heater, a heat pump water heater and a hot water system

Abstract

This invention belongs to the field of water heater technology and discloses an outdoor unit, a heat pump water heater, and a hot water system for a heat pump water heater. The outdoor unit of the heat pump water heater includes an outdoor heat exchange module and a water circuit pressurization module. The water circuit pressurization module includes a booster pump, an inlet connected to an external water source, and a supply outlet for supplying pressurized water to the outside. The inlet end of the booster pump is connected to the inlet, and the outlet end of the booster pump is connected to the supply outlet. This invention integrates the water circuit pressurization module on the outdoor unit. The external water source directly enters the water circuit pressurization module, is boosted by the booster pump, and flows out from the supply outlet. It can be used directly for cold water supply or to supply water to a heating tank for heating, thereby achieving simultaneous pressurization of both cold and hot water supply. The water circuit pressurization module is integrated on the outdoor unit, eliminating the need for a separate connection and power supply, making installation and use convenient.

Description

Technical Field

[0001] This invention belongs to the field of water heater technology, specifically, it relates to an outdoor unit of a heat pump water heater, a heat pump water heater and a hot water system. Background Technology

[0002] The working principle of a heat pump water heater is that the low-temperature, low-pressure refrigerant liquid in the evaporator absorbs heat from the air, causing the refrigerant to vaporize into a low-temperature, low-pressure refrigerant gas. Then, the compressor compresses the gas, increasing its pressure and temperature, transforming it into a high-temperature, high-pressure gas. This gas then exchanges heat with the water in the tank through a heat exchanger, raising the water temperature. Simultaneously, the refrigerant, after undergoing heat exchange, becomes a low-temperature, high-pressure liquid. This liquid is then throttled by a throttling device, becoming a low-temperature, low-pressure liquid again, before re-entering the evaporator to repeat the process. Traditional electric and gas water heaters obtain heat energy by consuming gas and electricity, while heat pump water heaters heat water by absorbing heat from the air. They can absorb approximately three times the amount of heat energy needed to heat water while consuming the same amount of electricity, thus exhibiting energy-saving and high-efficiency characteristics, and are increasingly widely used.

[0003] A typical household split-type heat pump water heater consists of an outdoor unit that exchanges heat with the air outdoors, and an indoor heating tank that heats the water to supply hot water. In use, the inlet of the heating tank is directly connected to the municipal water supply, heating the incoming tap water. When the user needs hot water, it is delivered to various water points in the home via hot water pipes. Each water point is also directly connected to the municipal water supply via cold water pipes. The water from the cold and hot water pipes is mixed at the water point using a mixing valve to obtain water at a suitable temperature for the user.

[0004] However, in scenarios with low tap water pressure, such as in southern rural towns without running water or with self-built water towers, or in high-rise buildings in rural areas with running water, insufficient water pressure may prevent the heating tank of the heat pump water heater from filling completely. This results in insufficient stored hot water to meet the user's demand when demand is high. To address this, existing technologies typically install a separate booster pump module on the tap water line to pressurize the water system throughout the house. However, the booster pump module, outdoor unit, and heating tank are independent of each other and require separate power supplies, leading to complex water and electrical connections, cumbersome installation of split-type heat pump water heaters, and higher costs.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an outdoor unit of a heat pump water heater, a heat pump water heater and a hot water system. By setting a water circuit pressurization module, the supply of cold water and hot water can be pressurized simultaneously. Moreover, the water circuit pressurization module is integrated on the outdoor unit, which eliminates the trouble of connecting a separate pressurization pump in the water circuit and facilitates the installation and use of the heat pump water heater.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0008] An outdoor unit of a heat pump water heater includes an outdoor heat exchange module and a water circuit pressurization module. The water circuit pressurization module includes a booster pump, an inlet connected to an external water source, and a water supply outlet for supplying pressurized water to the outside. The inlet end of the booster pump is connected to the inlet, and the outlet end of the booster pump is connected to the water supply outlet.

[0009] Furthermore, the outdoor heat exchange module includes a housing and an outdoor heat exchanger disposed inside the housing, and the water pressure boosting module is installed on the outer wall of the housing;

[0010] Preferably, one outer wall of the housing has a working fluid inlet and a working fluid outlet that communicate with the outdoor heat exchanger, and the opening direction of the water inlet and the water supply outlet faces the side where the working fluid inlet and the working fluid outlet are located.

[0011] More preferably, the water booster module is installed on the top surface of the housing, with the installation position close to the side where the working fluid inlet and outlet are located.

[0012] Furthermore, the water booster module also includes a cover installed on the top surface of the housing, the booster pump is located inside the cover, and the water inlet and water outlet are located on the cover.

[0013] Furthermore, the housing is also equipped with an inlet pipe and an outlet pipe. The two ends of the inlet pipe are respectively connected to the inlet on the housing and the inlet of the booster pump, and the two ends of the outlet pipe are respectively connected to the supply port on the housing and the outlet of the booster pump.

[0014] Furthermore, the water outlet pipe includes a first water outlet section connected to the water supply port, and a second water outlet section connecting the first water outlet section to the water outlet end of the booster pump;

[0015] The first water outlet section extends a certain length from the water supply port in the opposite direction of the water outlet direction. The second water outlet section is set perpendicular to the first water outlet section and extends from the extension end of the first water outlet section towards the location of the booster pump to connect with the water outlet end of the booster pump.

[0016] Furthermore, the first water outlet section extends downward at a relative horizontal angle, and the end of the extension of the first water outlet section is lower than the height of the water supply outlet.

[0017] Preferably, the portion of the first water outlet section near both ends extends horizontally, while the middle portion extends downward at an angle.

[0018] Furthermore, a fixed bracket is provided on the top surface of the housing, and the booster pump is mounted on the fixed bracket;

[0019] Preferably, the fixing bracket includes a fixing part connected to the top surface of the housing, and a mounting part extending upward from the fixing part, wherein the booster pump is mounted on the mounting part;

[0020] More preferably, there is a certain gap between the bottom of the booster pump and the top surface of the housing.

[0021] Another object of the present invention is to provide a heat pump water heater, including a heating water tank and the outdoor unit described above; the heating water tank has a water storage cavity, and a hot water outlet communicating with the water storage cavity is provided on the heating water tank; the water supply port of the water circuit booster module is connected to the water storage cavity through a connecting pipe to supply water to the water storage cavity.

[0022] Furthermore, the water supply outlet is also connected to a cold water pipe that supplies cold water to the outside.

[0023] Preferably, the inlet end of the cold water pipe is connected to the water supply port, or the inlet end of the cold water pipe is connected to the connecting pipeline.

[0024] A third objective of this invention is to provide a hot water system, including the heat pump water heater described above, and several water usage points, wherein the inlet of the water booster module is connected to an external water source, and the hot water outlet is connected to each water usage point via a hot water pipe;

[0025] The hot water system also includes cold water pipes connected to each water point, with the inlet end of the cold water pipe connected to the connecting pipeline or to the water supply port.

[0026] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0027] The heat pump water heater of this invention integrates a water pressure boosting module on the outdoor unit. External water sources directly enter the module, are boosted by the pump, and then flow out from the water supply outlet. This water can be used directly for cold water supply or to supply water to the heating tank for heating, thus achieving simultaneous pressure boosting of both cold and hot water supply. Since the water pressure boosting module is integrated into the outdoor unit, it does not require a separate connection and power supply, making it easy to install and use.

[0028] In the outdoor unit of this invention's heat pump water heater, the water pressure boosting module is installed on the outer wall of the casing, without affecting the existing internal structure of the outdoor unit. A water tank heat exchanger is installed on the heating water tank to heat the stored water inside. The working fluid inlet and outlet on the casing are connected to the water tank heat exchanger via pipes. Since the water supply outlet needs to connect to the heating water tank to supply water, the opening direction of both the inlet and outlet is set to face the side where the working fluid inlet and outlet are located. This concentrates all the parts of the outdoor unit that need to connect to the heating water tank on the same side of the outdoor unit, reducing the length of the pipes and making pipe connections more convenient.

[0029] In the hot water system of this invention, the outdoor unit of the heat pump water heater is installed outdoors, and the water pressure boosting module is directly installed at the water inlet of the whole house and connected to the external water source. The external water supply first enters the booster pump for pressurization, and after pressurization, it can be divided into two paths. One path enters the heating water tank for heating, and then supplies hot water through the hot water pipe. The other path enters the cold water pipe for direct cold water supply. In this way, dual pressurization of the water flow in the cold water pipe and the hot water pipe is achieved, which improves the user's water use experience.

[0030] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0032] Figure 1 This is a schematic diagram of the outdoor unit in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the outdoor unit with the cover removed in Embodiments 1 and 2 of the present invention;

[0034] Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle;

[0035] Figure 4 This is a top view of the outdoor unit with the cover removed in Embodiments 1 and 2 of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the heating water tank in an embodiment of the present invention;

[0037] Figure 6 These are schematic diagrams of the hot water systems in embodiments two and three of the present invention.

[0038] In the diagram: 1. Main water supply pipe; 2. Connecting pipe; 3. Hot water pipe; 4. Cold water pipe; 5. Water usage point; 6. Outdoor unit; 7. Heating water tank; 100. Outdoor heat exchange module; 110. Housing; 111. Working fluid inlet; 112. Working fluid outlet; 200. Water booster module; 210. Cover; 211. Water inlet; 212. Water supply outlet; 220. Booster pump; 221. Water inlet end; 222. Water outlet end; 230. Water inlet pipe; 240. Water outlet pipe; 241. First water outlet section; 242. Second water outlet section; 250. Fixed bracket; 251. Fixing part; 252. Installation part; 701. Cold water inlet; 702. Hot water outlet; 703. Working fluid inlet; 704. Working fluid outlet; 710. Outer casing.

[0039] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Example 1

[0044] like Figures 1 to 5As shown, this embodiment provides an outdoor unit 6 for a heat pump water heater, and a heat pump water heater including the outdoor unit 6. Specifically, the heat pump water heater is a split-type heat pump water heater, including the outdoor unit 6 and a heating water tank 7. The outdoor unit 6 is placed outside the user's house to absorb heat from the air. The compressor performs work, transferring the heat from a low-temperature heat source to a high-temperature heat source. The transferred heat is absorbed by the water in the heating water tank 7, heating the water and thus enabling the supply of hot water to the outside.

[0045] In this embodiment, the outdoor unit 6 includes an outdoor heat exchange module 100 and a water booster module 200. The water booster module 200 includes a booster pump 220, an inlet 211 connected to an external water source, and a supply outlet 212 for supplying boosted water to the outside. The inlet end 221 of the booster pump 220 is connected to the inlet 211, and the outlet end 222 of the booster pump 220 is connected to the supply outlet 212.

[0046] In use, the water booster module 200 of the outdoor unit 6 is directly connected to the whole-house water inlet of the user's home. Specifically, the main water supply line of the household is directly connected to the inlet 211, and the water supply outlet 212 can be connected to the heating water tank 7 through the connecting pipe to supply water to the heating water tank 7. It can also be directly connected to multiple water points in the home through the cold water pipe to supply cold water.

[0047] In the above solution, a water booster module 200 is integrated on the outdoor unit 6. An external water source directly enters the water booster module 200, and after being amplified by the booster pump 220, it flows out from the water supply port 212. The pressurized water flowing out of the water supply port 212 can be used directly for cold water supply, or it can supply water to the heating water tank 7 for heating, thus achieving simultaneous pressurization of both cold and hot water supply. The water booster module 200 is integrated on the outdoor unit 6, eliminating the need for separate installation. It can be powered and controlled by the outdoor unit 6 as a whole, saving the complex water and electrical modifications required when installing a separate booster pump on the user's main water supply line, thus simplifying installation and use.

[0048] In this embodiment, a DC 11-meter head pump can be used as the booster pump 220, with a flow rate of 8 meters per second.

[0049] In the specific scheme of this embodiment, the outdoor heat exchange module 100 includes a housing 110 and an outdoor heat exchanger disposed inside the housing 110, and the water booster module 200 is installed on the outer wall of the housing 110.

[0050] In detail, the outdoor heat exchanger contains a flowing working fluid that absorbs heat from the air, changing from a liquid to a gaseous state. A compressor connected to the outdoor heat exchanger is also installed in the housing 110. The gaseous working fluid is transported by the compressor out of the outdoor unit 6 and into the water tank heat exchanger on the heating water tank 7, where it exchanges heat with the water in the heating water tank 7, raising the water temperature. Simultaneously, the gaseous working fluid condenses in the water tank heat exchanger, reforming into a liquid state and circulating back into the outdoor heat exchanger.

[0051] Installing the water booster module 200 on the outer wall of the housing 110 does not affect the existing internal structure of the housing 110. Therefore, it is possible to modify the existing outdoor unit without changing or with almost no change to the original internal structure of the housing 110, thus obtaining the outdoor unit 6 with the water booster module 200 in this embodiment, which is beneficial to the production and manufacturing of the outdoor unit 6 in this embodiment.

[0052] In a further embodiment, the outer wall of the housing 110 has a working fluid inlet 111 and a working fluid outlet 112 that are connected to the outdoor heat exchanger, and the opening directions of the water inlet 211 and the water outlet 212 are towards the side where the working fluid inlet 111 and the working fluid outlet 112 are located.

[0053] In the above scheme, to achieve the circulation of the working fluid among the outdoor heat exchanger, compressor, and water tank heat exchanger, the housing 110 is respectively provided with a working fluid outlet 112 for the working fluid to flow out and a working fluid inlet 111 for the working fluid to flow in. Correspondingly, the heating water tank 7 is also provided with a working fluid inlet 703 and a working fluid outlet 704, which are respectively connected to the water tank heat exchanger. In use, the working fluid outlet 112 on the housing 110 is connected to the working fluid inlet 703 on the heating water tank 7, and the working fluid inlet 111 on the housing 110 is connected to the working fluid outlet 704 on the heating water tank 7, thereby forming a working fluid circulation loop.

[0054] After passing through the water booster module 200, the external water supply flows out from the water supply port 212 on the water booster module 200. The water supply port 212 needs to be connected to the water storage chamber in the heating water tank 7 through a pipeline to achieve the purpose of supplying water to the heating water tank 7. In this embodiment, the working fluid inlet 111 and the working fluid outlet 112 are located on the right side of the box 110. Correspondingly, the opening direction of the water inlet 211 and the water supply port 212 is set to the right, so that the parts of the outdoor unit 6 that need to be connected to the heating water tank 7 are concentrated on the right side of the outdoor unit 6. When building the pipeline for connection, the length of the pipeline can be reduced, and the pipeline connection is more convenient.

[0055] In a preferred embodiment, the water booster module 200 is installed on the top surface of the housing 110, near the side where the working fluid inlet 111 and working fluid outlet 112 are located. Installing the entire water booster module 200 on the top surface of the housing 110 does not occupy space on the outer periphery of the housing 110. The water booster module 200 is located at the right end of the top surface of the housing 110, ensuring that the working fluid inlet 111, working fluid outlet 112, water inlet 211, and water outlet 212 are all located on the far right side of the housing 110, thus simplifying the pipeline connection to the greatest extent possible.

[0056] In a further embodiment, the water booster module 200 also includes a cover 210 installed on the top surface of the housing 110, a booster pump 220 is disposed inside the cover 210, and an inlet 211 and a supply 212 are disposed on the cover 210.

[0057] In the above scheme, the casing 210 encloses the booster pump 220 in the space formed by the casing 210 and the top surface of the housing 110. The booster pump 220 is not in direct contact with the external space, which can protect the booster pump 220 and prevent it from being damaged by bumps.

[0058] In a further embodiment, the housing 210 is further provided with an inlet pipe 230 and an outlet pipe 240. The two ends of the inlet pipe 230 are respectively connected to the inlet port 211 on the housing 210 and the inlet end 221 of the booster pump 220. The two ends of the outlet pipe 240 are respectively connected to the supply port 212 on the housing 210 and the outlet end 222 of the booster pump 220.

[0059] Specifically, the water outlet pipe 240 includes a first water outlet section 241 connected to the water supply port 212, and a second water outlet section 242 connecting the first water outlet section 241 to the water outlet end 222 of the booster pump 220.

[0060] The first water outlet section 241 extends a certain length from the water supply port 212 in the opposite direction of the water outlet direction. The second water outlet section 242 is set perpendicular to the first water outlet section 241 and extends from the extension end of the first water outlet section 241 to the direction of the booster pump 220 and connects to the water outlet end 222 of the booster pump 220.

[0061] In this embodiment, to simplify the water circuit structure and improve the aesthetics of the water booster module 200, the inlet 211 and the outlet 212 are located on the same side. Since the inlet 221 and outlet 222 of the booster pump 220 are perpendicular to each other, the water flow is guided to change direction through the outlet pipe 240. The outlet pipe 240 consists of a first outlet section 241 and a second outlet section 242 that are perpendicular to each other. The structure is simple and easy to implement, while minimizing the space it occupies inside the casing 210.

[0062] Furthermore, the first water outlet section 241 extends downward at an angle relative to the horizontal direction, and the end of the extension of the first water outlet section 241 is lower than the height of the water supply port 212.

[0063] Preferably, the portion of the first water outlet section 241 near both ends extends horizontally, while the middle portion extends downward at an angle.

[0064] In this embodiment, the inlet 211 and the outlet 212 are positioned at the same height on the housing 210, making the water booster module 200 more aesthetically pleasing. However, the inlet 221 and outlet 222 of the booster pump 220 are at different heights. Since the outlet 222 of the booster pump 220 is oriented horizontally, the second outlet section 242 extends horizontally to facilitate connection with the outlet 222. The height difference between the inlet 221 and outlet 222 of the booster pump 220 needs to be compensated by partially tilting the first outlet section 241. The outlet 212 is oriented horizontally, and the second outlet section 242 extends horizontally. The two ends of the first outlet section 241 are horizontally extended for easy connection, while the middle portion extends at an angle to compensate for the height difference.

[0065] In a further embodiment, a fixed bracket 250 is provided on the top surface of the housing 110, and the booster pump 220 is mounted on the fixed bracket 250.

[0066] In the above solution, the booster pump 220 is mounted on the fixed bracket 250 instead of directly on the top surface of the housing 110. The fixed bracket 250 can buffer the vibration generated by the booster pump 220 during operation, thus avoiding serious impact on the housing 110 and internal structure of the outdoor heat exchange module 100. For example, it may cause loosening at the connection points of various parts of the housing 110 or the connection structure of various components inside the housing 110, thus affecting the operation of the outdoor heat exchange module 100.

[0067] In a preferred embodiment, the fixed bracket 250 includes a fixing part 251 connected to the top surface of the housing 110, and an mounting part 252 extending upward from the fixing part 251, with the booster pump 220 mounted on the mounting part 252.

[0068] More preferably, there is a certain gap between the bottom of the booster pump 220 and the top surface of the housing 110.

[0069] Specifically, the fixing part 251 is connected to the top surface of the housing 110 by screws, and the booster pump 220 is installed on the mounting part 252 by screws, so that there is a certain gap between the booster pump 220 and the top surface of the housing 110.

[0070] In the above scheme, the connection between the fixed bracket 250 and the housing 110 is realized through the structural design of the fixed bracket 250. At the same time, the booster pump 220 is lifted by the mounting part 252 so that it is as far away from the top surface of the housing 110 as possible, which further weakens the vibration of the booster pump 220.

[0071] The split-type heat pump water heater provided in this embodiment includes a heating water tank 7 and the outdoor unit 6 described above. The heating water tank 7 has a water storage chamber, and a hot water outlet 702 communicating with the water storage chamber is provided on the heating water tank 7. The water supply port 212 of the water circuit booster module 200 is connected to the water storage chamber through a connecting pipe to supply water to the water storage chamber.

[0072] Specifically, the heated water tank 7 includes an outer shell 710 and an inner liner disposed inside the outer shell 710, the interior of which forms a water storage cavity. A cold water inlet 701 is provided on the outer shell 710 and communicates with the inner liner. The two ends of the communicating pipe are respectively connected to the water supply port 212 of the water booster module 200 and the cold water inlet 701 on the outer shell 710, thereby supplying water to the inner liner.

[0073] A water tank heat exchanger is wound around the outer wall of the inner tank, through which the working fluid changes from a gaseous state to a liquid state, releasing heat to heat the water in the inner tank, thus raising the temperature of the water in the heating water tank 7. The working fluid inlet 703 and the working fluid outlet 704, which are connected to the water tank heat exchanger, extend from the outer casing 710, and are thus connected to the working fluid outlet 112 and the working fluid inlet 111 on the outdoor unit 6 through pipes.

[0074] Hot water outlet 702 is located on the outer shell 710 and communicates with the interior of the inner tank. As cold water is injected into the inner tank, the heated water in the inner tank can flow out through hot water outlet 702 under water pressure, thus achieving hot water supply. Since the cold water entering the inner tank is pressurized water through booster pump 220, the hot water supply is pressurized.

[0075] In a further embodiment, the water supply port 212 is also connected to a cold water pipe that supplies cold water to the outside.

[0076] Preferably, the inlet end of the cold water pipe is connected to the water supply port 212, or the inlet end of the cold water pipe is connected to the connecting pipeline.

[0077] In the above solution, by connecting the water supply port 212 to the cold water pipe, the pressurized water can be directly supplied as cold water, thus achieving pressurization of the cold water supply. In this embodiment, during the installation of the heat pump water heater, the main household water supply line is directly connected to the water pressure boosting module 200. After the pressurized water flows out from the water supply port 212, both cold and hot water can be supplied simultaneously, achieving simultaneous pressurization of both cold and hot water supplies and improving the user's water usage experience.

[0078] Specifically, one implementation of this embodiment is to connect a tee connector at the water supply port 212, with one outlet of the tee connector connected to one end of the connecting pipe and the other outlet connected to the inlet of the cold water pipe.

[0079] Another implementation of this embodiment is to install a tee connector on the connecting pipeline for connecting the cold water pipe. Specifically, the connecting pipeline includes an upstream pipeline and a downstream pipeline. The water supply port 212 is connected to the inlet of the tee connector via the upstream pipeline, one outlet of the tee connector is connected to the cold water inlet 701 via the downstream pipeline, and the other outlet of the tee connector is connected to the inlet end of the cold water pipe.

[0080] In the first implementation described above, the cold water pressurized by the booster pump 220 is split into two streams at the water supply inlet 212, flowing into the heating water tank 7 and the cold water pipe respectively. In the second implementation, the water flowing out of the water supply inlet 212 first enters the upstream pipeline, and then is split through a tee connector into the heating water tank 7 and the cold water pipe respectively. For most users, the cold water pipes in their homes are already pre-installed, and users can choose a suitable method for water connection based on the location of the cold water pipe inlet and the installation location of the outdoor unit 6.

[0081] In this embodiment, a water booster module 200 is integrated into the outdoor unit 6 of the heat pump water heater. An external water source is directly connected to the inlet 211, and the water is pressurized by the booster pump 220 before flowing out from the supply outlet 212, splitting into two streams for pressurized water supply. One stream enters the cold water pipe directly for cold water supply, while the other stream supplies water to the heating tank 7 of the heat pump water heater. After being heated by the heating tank 7, the water flows out as hot water. This achieves simultaneous pressurization of both cold and hot water supplies, improving the user's water usage experience. Furthermore, the integrated water booster module 200 on the outdoor unit 6 facilitates installation and can be powered and controlled by the outdoor unit 6, making it convenient to use.

[0082] Example 2

[0083] like Figures 1 to 6 As shown, this embodiment provides a hot water system, including the heat pump water heater described in Embodiment 1 above, and several water points 5. The inlet 211 of the water booster module 200 is connected to an external water source, and the hot water outlet 702 is connected to each water point 5 through a hot water pipe 3.

[0084] The hot water system also includes a cold water pipe 4 connected to each water point 5, with the inlet end of the cold water pipe 4 connected to the connecting pipe 2.

[0085] In the above scheme, the outdoor unit 6 is directly installed at the water inlet of the whole house and connected to the external water source. Specifically, water from the tap well is pumped into the water storage tank in the user's home for storage. When the user has water demand, the water storage tank supplies water to the main water supply pipe 1 in the user's home. In this implementation, the inlet 211 of the water booster module 200 is directly connected to the main water supply pipe 1 connected to the outlet of the water storage tank. After being boosted by the booster pump 220 inside the water booster module 200, the water is then delivered into the heating water tank 7 and the cold water pipe 4 respectively. At the same time, the hot water in the inner tank of the heating water tank 7 enters the hot water pipe 3 under water pressure. The hot water pipe 3 and the cold water pipe 4 deliver hot water and cold water to the water point 5 respectively. After being mixed by the mixing valve at the water point 5, water at a suitable temperature is obtained for the user's use.

[0086] The hot water system in this embodiment achieves simultaneous pressurization of the water flow in both the cold water pipe 4 and the hot water pipe 3 by integrating an outdoor unit 6 with a water pressure boosting module 200 and subsequent pipe connections, thus improving the user's water experience. This embodiment requires minimal modification to the existing water system, has low modification costs, and is easy to implement.

[0087] In another embodiment, the inlet of the cold water pipe can be directly connected to the water supply port, which can also achieve the effect of simultaneously pressurizing the water flow in the cold water pipe and the hot water pipe through the water pressure boosting module on the outdoor unit.

[0088] Example 3

[0089] like Figure 1 As shown, the difference between this embodiment and the first embodiment above is that the water outlet pipe from the water supply port 212 on the cover 210 to the water outlet of the booster pump includes a first water outlet section, a preheating section and a second water outlet section in sequence. The preheating section is set inside the box 110 of the outdoor heat exchange module 100.

[0090] Specifically, a heat exchange device is installed inside the housing 110. The preheating section passes through the heat exchange device and exchanges heat with it, thereby preheating the water flow in the preheating section. Since the outdoor unit 6 is installed outside the user's house, especially in winter when the outside temperature is low, the preheating section can prevent the water in the inlet pipe from freezing into ice, or even causing the inlet pipe to crack.

[0091] In this embodiment, the heat exchange device is located near the compressor inside the housing 110. It can absorb the heat emitted during the operation of the compressor and then transfer the absorbed heat to the water flow in the preheating section to preheat the water flow.

[0092] Specifically, a first through hole and a second through hole are formed on the top surface of the housing 100 in the area inside the casing 210. The water inlet of the preheating section extends out of the housing 100 through the first through hole, and the water outlet of the preheating section extends out of the housing 110 through the second through hole. The second water outlet is connected to the water inlet of the booster pump and extends horizontally backward until it connects with the water inlet of the preheating section. The first water outlet extends horizontally to the right from the water outlet of the preheating section and connects with the water supply port 212.

[0093] In this embodiment, when the outdoor unit 6 is working, external water enters the water booster module 200 through the inlet 211, flows through the inlet pipe, is pressurized by the booster pump, and then enters the preheating section located inside the housing 110 through the second outlet section. During the preheating section, the water flows through the heat exchange device inside the housing 110 to achieve preheating, preventing the water temperature from being too low, especially preventing freezing when the outdoor ambient temperature is low. After passing through the preheating section, the water enters the first outlet section and is transported to the water supply port 212, which can supply water to the heating water tank 7 or directly supply cold water.

[0094] This embodiment also provides a heat pump water heater including the outdoor unit 6 described above. The connection method between the outdoor unit 6 and the heating water tank 7 in the heat pump water heater is the same as in Embodiment 1, and will not be repeated here.

[0095] like Figure 6 As shown, this embodiment also provides a hot water system including the heat pump water heater. The inlet 211 of the water booster module 200 is connected to an external water source, and the hot water outlet 702 of the heating water tank 7 is connected to each water point 5 via a hot water pipe 3. Each water point 5 is also connected to a cold water pipe 4, and the inlet end of the cold water pipe 4 is connected to a connecting pipe 2 that connects the water supply port 212 of the water booster module 200 to the cold water inlet 701 of the heating water tank.

[0096] In this embodiment, when a user has a water demand, external water supply enters the water pressure boosting module 200 through inlet 211. It is first pressurized by a booster pump, and then preheated as it passes through the outlet pipe, especially the preheating section. Finally, it flows out through supply outlet 212, entering both the cold water pipe 4 and the connecting pipe 2. The connecting pipe 2 then delivers the water to the heating water tank 7, allowing the hot water in the heating water tank 7 to flow out through the hot water outlet 702 into the hot water pipe 3. This method preheats the external water supply before it enters the cold water pipe 4 and the heating water tank 7, preventing the water temperature from being too low. Simultaneously, it pressurizes the water flow in both the cold water pipe 4 and the hot water pipe 3, improving the user's water usage experience.

[0097] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A heat pump water heater, comprising a separately configured heating water tank and an outdoor unit, wherein the heating water tank includes an outer shell and an inner tank disposed within the outer shell, the interior of the inner tank forming a water storage cavity, and the heating water tank is provided with a hot water outlet communicating with the water storage cavity, characterized in that, The outdoor unit includes an outdoor heat exchange module and a water circuit pressurization module. The outdoor heat exchange module includes a housing, and an outdoor heat exchanger and a compressor that are interconnected inside the housing. A water tank heat exchanger is wound around the outer wall of the inner tank. The working fluid inlet and working fluid outlet that are connected to the water tank heat exchanger extend from the outer shell and are respectively connected to the working fluid outlet and working fluid inlet on the outdoor unit through pipelines. The flowing working fluid absorbs heat from the air in the outdoor heat exchanger, changing from a liquid state to a gaseous state. The gaseous working fluid is then transported out of the outdoor unit by the compressor and enters the water tank heat exchanger on the heating water tank. It releases heat to heat the water in the inner tank, causing the water temperature in the heating water tank to rise. The gaseous working fluid condenses into a liquid state in the water tank heat exchanger and is then circulated back to the outdoor heat exchanger. The water booster module includes a booster pump, an inlet connected to an external water source, and a supply outlet for supplying boosted water to the outside; the inlet end of the booster pump is connected to the inlet, and the outlet end of the booster pump is connected to the supply outlet. The water booster module is installed on the outer wall of the housing and is powered and controlled by the outdoor unit. The outer shell of the heating water tank is provided with a cold water inlet that communicates with the inner tank. The water supply port of the water booster module is connected to a connecting pipe, and the other end of the connecting pipe is connected to the cold water inlet to supply water to the inner tank. The water supply port is also connected to a cold water pipe that supplies cold water to the outside. The water supply port is connected to the outlet of the booster pump via an outlet pipe. The outlet pipe includes a first outlet section connected to the water supply port and a second outlet section connecting the first outlet section to the outlet of the booster pump. The first outlet section extends a certain length from the water supply port in the opposite direction of the water outlet direction. The second outlet section is perpendicular to the first outlet section and extends from the extension end of the first outlet section toward the location of the booster pump until it connects with the outlet of the booster pump. The portion of the first outlet section near both ends extends horizontally, while the middle portion extends downward at an angle, so that the extension end of the first outlet section is lower than the height of the water supply port.

2. The heat pump water heater according to claim 1, characterized in that, The working fluid inlet and working fluid outlet, which are connected to the outdoor heat exchanger, are located on one side of the outer wall of the housing, and the opening direction of the water inlet and water outlet faces the side where the working fluid inlet and working fluid outlet are located.

3. The heat pump water heater according to claim 2, characterized in that, The water booster module is installed on the top surface of the housing, near the working fluid inlet and outlet.

4. The heat pump water heater according to claim 1, characterized in that, The water booster module also includes a cover installed on the top surface of the housing, the booster pump is located inside the cover, and the water inlet and water outlet are located on the cover.

5. The heat pump water heater according to claim 4, characterized in that, The water outlet pipe is located inside the housing, and the housing is also equipped with a water inlet pipe. The two ends of the water inlet pipe are respectively connected to the water inlet on the housing and the water inlet of the booster pump.

6. The heat pump water heater according to any one of claims 1-5, characterized in that, A fixed bracket is provided on the top surface of the housing, and the booster pump is mounted on the fixed bracket.

7. The heat pump water heater according to claim 6, characterized in that, The fixed bracket includes a fixing part connected to the top surface of the housing, and an mounting part extending upward from the fixing part, wherein the booster pump is mounted on the mounting part.

8. The heat pump water heater according to claim 7, characterized in that, There is a certain gap between the bottom of the booster pump and the top surface of the housing.

9. The heat pump water heater according to any one of claims 1-5, characterized in that, The water inlet is also connected to a cold water pipe that supplies cold water to the outside.

10. The heat pump water heater according to claim 9, characterized in that, A tee connector is connected to the water supply port. One outlet of the tee connector is connected to one end of the connecting pipe, and the other outlet is connected to the inlet of the cold water pipe. Alternatively, a tee connector may be provided on the connecting pipeline for connecting to a cold water pipe; wherein, the connecting pipeline includes an upstream pipeline and a downstream pipeline, the water supply port is connected to the inlet of the tee connector via the upstream pipeline, one outlet of the tee connector is connected to the cold water inlet via the downstream pipeline, and the other outlet is connected to the inlet end of the cold water pipe.

11. A hot water system comprising a heat pump water heater as described in any one of claims 1-10, and a plurality of water usage points, characterized in that, The water inlet of the water booster module is connected to an external water source, and the hot water outlet is connected to each water point through a hot water pipe. The hot water system also includes cold water pipes connected to each water point, with the inlet end of the cold water pipe connected to the connecting pipeline or to the water supply port.

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