CN115406103A - Outdoor unit of heat pump water heater, heat pump water heater and hot water system - Google Patents

Abstract

The invention discloses an outdoor unit of a heat pump water heater, the heat pump water heater and a hot water system, wherein the outdoor unit comprises an outdoor heat exchange module and a circulating pressurization module, the circulating pressurization module comprises a water pump, a water inlet connected with an external water source and a first water supply port for supplying pressurized water to the outside; the water inlet end of the water pump is communicated with the water inlet, and the water outlet end of the water pump is communicated with the first water supply port; the circulating pressurization module further comprises a second water supply port, and the second water supply port is communicated with the water inlet end and the water outlet end of the water pump through one switching mechanism. The outdoor unit of the invention controls the communication direction of the second water supply port by the reversing mechanism, and can realize the function of simultaneously pressurizing the supply of cold water and hot water and the function of zero cold water by the same water pump, thereby saving the trouble of respectively arranging a circulating pump and a booster pump in the prior art. Meanwhile, the circulating pressurization module is integrally integrated on the outdoor unit, and is not required to be connected and powered independently, so that the installation and the use are convenient.

Description

Outdoor unit of heat pump water heater, heat pump water heater and hot water system

Technical Field

The invention belongs to the technical field of water heaters, and particularly relates to an outdoor unit of a heat pump water heater, the heat pump water heater and a hot water system.

Background

The working principle of the heat pump water heater is that low-temperature low-pressure refrigerant liquid in an evaporator absorbs heat in air to gasify the refrigerant into low-temperature low-pressure refrigerant gas, then the refrigerant is pressurized and heated to become high-temperature high-pressure gas after being compressed by a compressor, and then the high-temperature high-pressure gas is subjected to heat exchange with water in a water tank by a heat exchanger in the water tank to heat water in the water tank. Meanwhile, the refrigerant is changed into low-temperature high-pressure liquid through the heat exchange process, is throttled by the throttling device to be changed into low-temperature low-pressure liquid, and enters the evaporator again to repeat the process. The traditional electric water heater and the traditional gas water heater obtain heat energy by consuming gas and electric energy, while the heat pump water heater achieves the purpose of heating water by absorbing heat in air, and can absorb heat energy which is about three times of electric energy to heat water under the condition of consuming the same electric energy, thereby having the characteristics of energy saving and high efficiency and being gradually widely used.

A household split heat pump water heater generally comprises an outdoor unit disposed outdoors for exchanging heat with air, and a heating water tank disposed indoors for heating water and supplying hot water. During the use, direct water inlet access running water pipeline with heating water tank to heating the running water that flows into heating water tank, carrying hot water to each water consumption department in the family through the hot-water line when the user has the hot water demand. And the water consumption points are also directly communicated with a tap water pipeline through cold water pipes, and the water outlet of the cold water pipes and the water outlet of the hot water pipes are mixed through water mixing valves at the water consumption points to obtain water with proper temperature for users to use.

However, for a use scenario with low water pressure of tap water, such as a use scenario without tap water or a self-built water tower in towns in south and a use scenario with high-rise tap water in towns, the insufficient water pressure may cause the heating water tank of the heat pump water heater to be not full, and the stored hot water is insufficient to meet the demand of the user when the demand of the user for hot water is large. To above-mentioned circumstances, generally set up the booster pump module alone on the water pipeline among the prior art, carry out the pressure boost to whole room water route. However, the booster pump module, the outdoor unit and the heating water tank are mutually independent and respectively need independent power supply, so that the water path and the circuit connection are complicated, the operation of installing the split heat pump water heater is complicated, and the cost is high.

On the other hand, when the water consumption point is far away from the water outlet of the heating water tank, the length of the hot water pipe is long, after hot water is not used for a period of time, residual water in the hot water pipe becomes cold, and hot water with the temperature meeting the use requirement can be obtained after a large amount of cold water needs to be discharged when the hot water is reused. In the prior art, a circulating pump is arranged on a water path to solve the problem, and cold water remained in a hot water pipe is pumped back into a heating water tank through a circulating pipeline to be heated, so that unnecessary cold water discharge is avoided. However, if two problems of waterway pressurization and zero cold water are simultaneously solved, a booster pump and a circulating pump are required to be respectively arranged, the complexity of the waterway and the circuit is further increased, and the use by users is not convenient.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an outdoor unit of a heat pump water heater, the heat pump water heater and a hot water system.

In order to solve the technical problems, the invention adopts the technical scheme that:

an outdoor unit of a heat pump water heater comprises an outdoor heat exchange module and a circulating pressurization module, wherein the circulating pressurization module comprises a water pump, a water inlet connected with an external water source and a first water supply port for supplying pressurized water to the outside; the water inlet end of the water pump is communicated with the water inlet, and the water outlet end of the water pump is communicated with the first water supply port;

the circulating pressurization module further comprises a second water supply port, and the second water supply port is communicated with the water inlet end and the water outlet end of the water pump through one switching mechanism.

Furthermore, the circulating pressurization module also comprises a water inlet pipe and a first water supply pipe, wherein the water inlet pipe is connected with the water inlet end of the water pump, and the first water supply pipe is connected with the first water supply port and the water outlet end of the water pump; the second water supply port is communicated with the water inlet pipe and the first water supply pipe through one selection of the reversing mechanism.

Furthermore, the reversing mechanism comprises a reversing valve, the reversing valve comprises a first opening communicated with the water inlet pipe, a second opening communicated with the first water supply pipe, a third opening communicated with the second water supply port, and a reversing piece for controlling the third opening to select one to be communicated with the first opening and the second opening;

preferably, a first branch connected with a first opening of the reversing valve is arranged on the water inlet pipe, and a second branch connected with a second opening of the reversing valve is arranged on the first water supply pipe.

Furthermore, the first water supply pipe comprises a first water outlet section connected to the first water supply port, and a second water outlet section connected to the first water outlet section and the water outlet end of the water pump;

the first water outlet section extends for a certain length from the first water supply port along the direction opposite to the water outlet direction, and the second water outlet section is perpendicular to the first water outlet section and extends from the extending tail end of the first water outlet section to the direction of the water pump to be connected with the water outlet end of the water pump; and the second opening of the reversing valve is communicated with the first water outlet section.

Furthermore, the water inlet pipe is arranged in parallel with the first water outlet section of the first water supply pipe, and the reversing valve is arranged in an interval area between the water inlet pipe and the first water outlet section;

preferably, the second water supply port is communicated with the third opening of the reversing valve through a second water supply pipe, and the second water supply pipe is arranged in an interval area between the water inlet pipe and the first water outlet section of the first water supply pipe and is parallel to the water inlet pipe.

Furthermore, the outdoor heat exchange module comprises a box body and an outdoor heat exchanger arranged in the box body, and the circulating pressurization module is arranged on the outer wall of the box body;

preferably, a working medium inlet and a working medium outlet which are communicated with the outdoor heat exchanger are formed in the outer wall of one side of the box body, and the opening directions of the water inlet, the first water supply port and the second water supply port face to the side where the working medium inlet and the working medium outlet are located;

preferably, the circulating pressurization module is installed on the top surface of the box body, and the installation position of the circulating pressurization module is close to one side where the working medium inlet and the working medium outlet are located.

Furthermore, a fixed bracket is arranged on the top surface of the box body, and the water pump is installed on the fixed bracket;

preferably, the fixing bracket comprises a fixing part connected to the top surface of the box body, and a mounting part formed by extending upwards from the fixing part, and the water pump is mounted on the mounting part;

preferably, a certain interval is arranged between the bottom of the water pump and the top surface of the box body.

Further, the circulation pressure boost module still includes the housing of installing on the box top surface, the water pump sets up inside the housing, water inlet, first water supply port and second water supply port all set up on the housing.

The invention also aims to provide a heat pump water heater, which comprises a heating water tank and the outdoor unit, wherein the heating water tank is provided with a water storage cavity, and a hot water outlet communicated with the water storage cavity is arranged on the heating water tank; and a first water supply port of the circulating pressurization module is communicated with the water storage cavity through a pipeline to supply water to the water storage cavity.

The third purpose of the invention is to provide a hot water system, which comprises the heat pump water heater and a plurality of water consumption points, wherein the water inlet of the circulating pressurization module is connected with an external water source, and the hot water outlet is connected with each water consumption point through a hot water pipe;

the hot water system also comprises a cold water pipe connected with each water consumption point, and the cold water pipe is connected with a second water supply port of the circulating pressurization module; the hot water pipe and the cold water pipe are communicated at each water using point.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

In the outdoor unit of the heat pump water heater, when the reversing mechanism is communicated with the second water supply port and the water outlet end of the water pump, water pressurized by the water pump can be respectively sent out from the first water supply port and the second water supply port so as to be respectively used for cold water supply and water supply for the heating water tank, thereby realizing the pressurization function of a whole water path. When the reversing mechanism is communicated with the second water supply port and the water inlet end of the water pump, cold water remained in a pipeline for supplying hot water to a water using point can be pumped into the pipeline from the second water supply port, and enters the heating water tank again to be heated after passing through the water pump, so that the function of zero cold water is realized. The water pump can realize the functions of full-waterway pressurization and zero cold water at the same time, and the waterway structure is simplified. Meanwhile, the circulating pressurization module comprising the water pump and the reversing mechanism is integrally arranged on the outdoor unit, and is not required to be separately connected and supplied with power, so that the outdoor unit is convenient to install and use.

In the outdoor unit of the heat pump water heater, the circulating pressurization module is arranged on the outer wall of the box body, and the existing structure in the outdoor unit is not influenced. The heating water tank is provided with a water tank heat exchanger for heating internal stored water, and a working medium inlet and a working medium outlet which are arranged on the tank body are connected with the water tank heat exchanger through pipelines. Because the first water supply port needs to be communicated with the heating water tank to supply water to the interior of the heating water tank, the opening directions of the water inlet and the first and second water supply ports are set to be towards one side where the working medium inlet and the working medium outlet are located, so that the parts of the outdoor unit, which need to be connected with the heating water tank, are concentrated on the same side of the outdoor unit, the setting length of pipelines is reduced, and the pipeline connection is more convenient.

In the hot water system, the outdoor unit of the heat pump water heater is arranged outdoors, the circulating pressurization module is directly arranged at the water inlet of the whole house and is connected with an external water source, when the second water supply port is communicated with the water outlet end of the water pump, external water supply firstly enters the water pump for pressurization, after pressurization, the external water supply is divided into two paths which respectively flow out of the first water supply port and the second water supply port, one path enters the heating water tank for heating and further passes through the hot water pipe for hot water supply, and the other path enters the cold water pipe for direct cold water supply, so that double pressurization of water flows in the cold water pipe and the hot water pipe is realized. When the second water supply port is communicated with the water inlet end of the water pump, residual cold water in the hot water pipe can flow back through the cold water pipe under the suction action of the water pump, returns to the circulating pressurization module through the second water supply port, is pumped out through the first water supply port through the water pump, and enters the heating water tank again to be heated, so that the function of zero cold water is realized. The user can control reversing mechanism according to the user demand and switch the direction of intercommunication of second supply water inlet to realize different functions, improved user's water experience.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic structural view of an outdoor unit according to an embodiment of the present invention;

fig. 2 is a schematic view of an outdoor unit of one and two embodiments of the present invention with a cover removed;

FIG. 3 is an enlarged schematic view at A of FIG. 2 of the present invention;

fig. 4 is a top view of an outdoor unit of the first and second embodiments of the present invention with the casing removed;

FIG. 5 is a schematic structural view of a heating water tank in an embodiment of the present invention;

FIG. 6 is a schematic view of a hot water system according to a second embodiment and a third embodiment of the present invention.

In the figure: 1. a water main; 2. a communicating pipeline; 3. a hot water pipe; 4. a cold water pipe; 5. water consumption; 6. an outdoor unit; 7. heating the water tank; 100. an outdoor heat exchange module; 110. a box body; 111. a working medium inlet; 112. a working medium outlet; 200. a circulating pressurization module; 210. a housing; 211. a water inlet; 212. a first water supply port; 213. a second water supply port; 220. a water pump; 221. a water inlet end; 222. a water outlet end; 230. a water inlet pipe; 231. a first branch; 240. a first water supply pipe; 241. a first water outlet section; 242. a second water outlet section; 243. a second branch circuit; 250. a second water supply pipe; 260. fixing a bracket; 261. a fixed part; 262. an installation part; 270. a diverter valve; 271. a first opening; 272. a second opening; 273. a third opening; 701. a cold water inlet; 702. a hot water outlet; 703. a working medium inlet; 704. a working medium outlet; 710. a housing.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, 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 drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1 to 5, the present embodiment provides an outdoor unit 6 of 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 and comprises an outdoor unit 6 and a heating water tank 7. The outdoor unit 6 is placed outdoors by a user to absorb heat from air, the heat is transferred from the low-temperature heat source to the high-temperature heat source by the action of the compressor, and the transferred heat is absorbed by water in the heating water tank 7, so that the water in the heating water tank 7 is heated, and the purpose of supplying hot water to the outside can be achieved.

In this embodiment, the outdoor unit 6 includes an outdoor heat exchange module 100 and a circulation pressurizing module 200, and the circulation pressurizing module 200 includes a water pump 220, a water inlet 211 connected to an external water source, and a first water supply port 212 for supplying pressurized water to the outside. The water inlet end 221 of the water pump 220 is in communication with the water inlet 211 and the water outlet end 222 of the water pump 220 is in communication with the first water supply port 212.

The circulation pressurization module 200 further comprises a second water supply port 213, and the second water supply port 213 is selectively communicated with the water inlet end 221 and the water outlet end 222 of the water pump 220 through a reversing mechanism.

When in use, the circulating pressurizing module 200 of the outdoor unit 6 is directly connected to the whole water inlet of the user's home. Specifically, a main line for supplying water to a home is directly connected to the water inlet 211, the first water supply port 212 is connected to the heating water tank 7 through a pipe to supply water into the heating water tank 7, and the second water supply port 213 is directly connected to a plurality of water consumption points in the home through a cold water pipe to supply cold water. The end part of the cold water pipe is also communicated with a hot water pipe which is connected with the water using point and the heating water tank 7 through a water mixing valve at the water using point.

In the above scheme, when the reversing mechanism communicates the second water supply port 213 with the water outlet end 222 of the water pump 220, the external water source directly enters the circulating pressurization module 200, and is pressurized by the water pump 220 and then flows out of the first water supply port 212 and the second water supply port 213 respectively. The water from the first water supply port 212 is used for supplying water to the heating water tank 7 for heating, and the water from the second water supply port 213 is directly used for supplying cold water, so that the simultaneous pressurization of the cold water and the hot water is realized.

When the reversing mechanism connects the second water supply port 213 and the water inlet 221 of the water pump 220, under the suction action of the water pump 220, the water in the hot water pipe may sequentially flow back to the circulating pressure increasing module 200 through the water mixing valve, the cold water pipe, and the second water supply port 213, and flow out of the first water supply port 212 again after passing through the water pump 220, and enter the heating water tank 7. Can send remaining cold water in the hot-water line to heating water tank 7 again like this and heat, avoided after a period of time does not use hot water, need discharge the condition of a large amount of cold water at the water consumption department when reusing hot water, zero cold water function when having realized hot water use.

Only need set up a water pump 220 among the circulation pressure boost module 200, through reversing mechanism's setting control water route intercommunication direction to can realize two kinds of functions of full water route pressure boost and zero cold water function, and need not to set up circulating pump and booster pump respectively, simplify the water route structure, make circulation pressure boost module 200 more miniaturized, save space, reduced manufacturing cost simultaneously. The circulating supercharging module 200 is integrated on the outdoor unit 6, and is not required to be installed independently, and can be integrally supplied with power and controlled by the outdoor unit 6, so that the complicated process of reconstructing a water path and a circuit when a circulating pump and a supercharging pump are independently arranged on a main pipeline of household water supply of a user is omitted, and the installation and the use are convenient.

In this embodiment, a pump with a direct current of 11 meters can be used as the water pump 220, and the flow rate is 8 meters per second.

In a further aspect of this embodiment, the circulation pressurization module 200 further includes a water inlet pipe 230 connecting the water inlet 211 and the water inlet end 221 of the water pump 220, and a first water supply pipe 240 connecting the first water supply port 212 and the water outlet end 222 of the water pump 220. The second water supply port 213 is selectively communicated with the water inlet pipe 230 and the first water supply pipe 240 by the reversing mechanism.

Specifically, the direction changing mechanism includes a direction changing valve 270, the direction changing valve 270 including a first opening 271 communicating with the water inlet pipe 230, a second opening 272 communicating with the first water supply pipe 240, and a third opening 273 communicating with the second water supply port 213, and a direction changing member (not shown) controlling the third opening 273 to selectively communicate with the first opening 271 and the second opening 272.

Preferably, the water inlet pipe 230 is provided with a first branch 231 connected to the first opening 271 of the direction changing valve 270, and the first water supply pipe 240 is provided with a second branch 243 connected to the second opening 272 of the direction changing valve 270.

In the above-described embodiment, the communication direction of the second water supply port 213 is controlled by the switching valve 270, and the structure is simple and easy to implement. The reversing valve 270 is respectively connected to the first branch 231 branched from the water inlet pipe 230 and the second branch 243 branched from the first water supply pipe 240, so as to avoid the arrangement of joints for splitting at the water inlet 211 and the first water supply port 212, and facilitate the arrangement of water paths in the circulating pressurization module 200.

In a further aspect of this embodiment, the first water supply tube 240 includes a first water outlet section 241 connected to the first water supply port 212, and a second water outlet section 242 connecting the first water outlet section 241 with the water outlet end 222 of the water pump 220.

The first water outlet section 241 extends from the first water supply port 212 along the direction opposite to the water outlet direction for a certain length, and the second water outlet section 242 is perpendicular to the first water outlet section 241, extends from the extending end of the first water outlet section 241 to the direction of the water pump 220, and is connected with the water outlet end 222 of the water pump 220. The second opening 271 of the directional valve 270 communicates with the first water outlet section 241.

In this embodiment, in order to simplify the waterway structure and improve the aesthetic property of the circulation pressurizing module 200, the water inlet 211, the first water supply inlet 212, and the second water supply inlet 213 are all disposed at the right side of the circulation pressurizing module 200, and since the water inlet end 221 and the water outlet end 222 of the water pump 220 are oriented perpendicular to each other, the water flow is guided to turn by the first water supply pipe 240. The first water supply pipe 240 is composed of a first water outlet section 241 and a second water outlet section 242 which are perpendicular to each other, and has a simple structure, and is easy to implement, and meanwhile, the space occupied by the pipeline arrangement is reduced as much as possible.

In a preferred version of this embodiment, the inlet tube 230 is disposed in parallel with the first outlet section 241 of the first water supply tube 240, and the diverter valve 270 is disposed in the spaced area between the inlet tube 230 and the first outlet section 241.

More preferably, the second water supply port 213 communicates with the third opening 273 of the reversing valve 270 through a second water supply pipe 250, the second water supply pipe 250 being disposed in the spaced area between the water inlet pipe 230 and the first water outlet section 241 of the first water supply pipe 240, in parallel with the water inlet pipe 230.

In the above solution, the water inlet tube 230, the second water supply tube 250 and the first water outlet section 241 of the first water supply tube 240 are parallel to each other, and the directional valve 270 is disposed in the interval area between the water inlet tube 230 and the first water outlet section 241 and is connected to the water inlet tube 230 and the first water outlet section 241, respectively. The second water supply port 213 is disposed between the water inlet port 211 and the first water supply port 212, and is connected to the direction switching valve 270 through the second water supply pipe 250 located in the spacing region between the water inlet pipe 230 and the first water outlet section 241, so that the water inlet pipe 230 and the first water outlet section 241 form a structure symmetrical to the direction switching valve 270 and the second water supply pipe 250, the first opening 271 and the second opening 272 of the direction switching valve 270 are symmetrical to the third opening 273, and the structure for switching the communication direction of the direction switching valve 270 is simpler.

Further, the first water outlet section 241 extends downward at an angle with respect to the horizontal, and the extending end of the first water outlet section 241 is lower than the first water supply port 212.

Preferably, the portions of the first water outlet section 241 near the two ends extend horizontally, and the middle portion extends obliquely downward.

In this embodiment, the water inlet 211 and the first water supply inlet 212 are disposed at the same height, so that the appearance of the circulation pressurizing module 200 is more beautiful, and the water inlet 221 and the water outlet 222 of the water pump 220 have different heights. Since the outlet end 222 of the water pump 220 is oriented horizontally, the second outlet section 242 extends horizontally to connect with the outlet end 222, and the height difference between the inlet end 221 and the outlet end 222 of the water pump 220 needs to be compensated by partially inclining the first outlet section 241. The first water supply inlet 212 is oriented horizontally, while the second water outlet section 242 extends horizontally, and both ends of the first water outlet section 241 are arranged to extend horizontally for connection, and the middle part extends obliquely to compensate for the height difference.

In this embodiment, the outdoor heat exchange module 100 includes a box body 110 and an outdoor heat exchanger disposed in the box body 110, and the circulation pressurization module 200 is mounted on an outer wall of the box body 110.

In detail, flowing working media are arranged in the outdoor heat exchanger, and the working media absorb heat from air in the outdoor heat exchanger so as to be converted from a liquid state to a gaseous state. The box body 110 is also provided with a compressor communicated with the outdoor heat exchanger, and the gaseous working medium is conveyed out of the outdoor unit 6 through the compressor, enters the water tank heat exchanger on the heating water tank 7, and exchanges heat with water in the heating water tank 7, so that the temperature of the water in the heating water tank 7 rises. Meanwhile, the gaseous working medium is condensed and reconverted into liquid in the water tank heat exchanger and then is recycled to the outdoor heat exchanger.

The circulating supercharging module 200 is installed on the outer wall of the box body 110, which does not affect the existing structure inside the box body 110, so that the outdoor unit 6 with the circulating supercharging module 200 in the embodiment can be obtained on the basis of the existing outdoor unit without changing or hardly changing the original structure inside the box body 110, and the production and manufacturing of the outdoor unit 6 in the embodiment are facilitated.

In a further scheme of the embodiment, the outer wall of one side of the box body 110 is provided with a working medium inlet 111 and a working medium outlet 112 which are communicated with the outdoor heat exchanger, and the opening directions of the water inlet 211, the first water supply port 212 and the second water supply port 213 face to the side where the working medium inlet 111 and the working medium outlet 112 are located.

In the above solution, in order to realize the circulation of the working medium among the outdoor heat exchanger, the compressor and the water tank heat exchanger, the box body 110 is respectively provided with a working medium outlet 112 for the working medium to flow out and a working medium inlet 111 for the working medium to flow in. Correspondingly, the heating water tank 7 is also provided with a working medium inlet 703 and a working medium outlet 704 which are respectively communicated with the water tank heat exchanger. When the device is used, the working medium outlet 112 on the box body 110 is communicated with the working medium inlet 703 on the heating water tank 7, and the working medium inlet 111 on the box body 110 is communicated with the working medium outlet 704 on the heating water tank 7, so that a working medium circulation loop is formed.

After passing through the circulation pressurization module 200, the external water flows out of the first water supply port 212 and the second water supply port 213 of the circulation pressurization module 200. The first water supply port 212 needs to be communicated with a water storage chamber in the heating water tank 7 through a pipeline to supply water to the heating water tank 7. The hot water outlet 702 on the heating water tank 7 is communicated with each water consumption point through a pipeline, the second water supply port 213 on the circulating pressurization module 200 is directly communicated with each water consumption point through a pipeline, when the first water supply port 212 and the second water supply port 213 face the same direction, the position of the heating water tank 7 can be arranged between the circulating pressurization module 200 and the water consumption point, and the waterway structure is more favorably simplified.

In this embodiment, the working medium inlet 111 and the working medium outlet 112 are disposed on the right side of the box body 110, and are required to be connected to the heating water tank 7 through a pipeline. Accordingly, the opening direction of the first water supply port 212 is set to the right direction so that the portions 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. Further, the opening directions of the water inlet 211 and the second water supply port 213 are set to be the same as those of the first water supply port 212, so that the setting length of the pipeline can be reduced when the pipeline is built for connection, and the pipeline connection is more convenient.

In a preferred embodiment of the present invention, the circulation pressurization module 200 is installed on the top surface of the tank 110 at a position close to the working medium inlet 111 and the working medium outlet 112. The circulating pressurizing module 200 is integrally installed on the top surface of the tank body 110 without occupying the space at the outer periphery of the tank body 110. The circulation pressurization module 200 is integrally located at the right end of the top surface of the tank 110, so that the working medium inlet 111, the working medium outlet 112, the water inlet 211, the first water supply port 212 and the second water supply port 213 are all located at the rightmost side of the tank 110, and the connection of pipelines can be simplified to the greatest extent.

In a further aspect of this embodiment, a fixing bracket 260 is disposed on the top surface of the tank 110, and the water pump 220 is mounted on the fixing bracket 260.

In the above scheme, the water pump 220 is mounted on the fixing bracket 260, rather than being directly mounted on the top surface of the box body 110, and the fixing bracket 260 can play a certain buffering role in the vibration generated in the working process of the water pump 220, thereby avoiding serious influence on the box body 110 and the internal structure of the outdoor heat exchange module 100, such as the connection of each part of the box body 110, or the connection structure of each part in the box body 110 becoming loose, and influencing the work of the outdoor heat exchange module 100.

In a preferred embodiment of the present invention, the fixing bracket 260 includes a fixing portion 261 coupled to the top surface of the case 110, and a mounting portion 262 formed to extend upward from the fixing portion 261, and the water pump 220 is mounted on the mounting portion 262.

Preferably, the bottom of the water pump 220 is spaced apart from the top surface of the tank 110.

Specifically, the fixing portion 261 is fixed to the top surface of the tank 110 by screws, and the water pump 220 is mounted to the mounting portion 262 by screws such that the water pump 220 is spaced apart from the top surface of the tank 110.

In the above solution, the fixing bracket 260 is connected to the tank 110 by the structural design of the fixing bracket 260, and the water pump 220 is lifted by the mounting portion 262 to be away from the top surface of the tank 110 as far as possible, thereby further weakening the vibration of the water pump 220.

In a further aspect of this embodiment, the circulation pressurization module 200 further includes a housing 210 installed on the top surface of the tank 110, the water pump 220 is disposed inside the housing 210, and the water inlet 211, the first water supply port 212, and the second water supply port 213 are disposed on the housing 210.

In the above scheme, the arrangement of the cover 210 seals the water pump 220 in the space enclosed by the cover 210 and the top surface of the tank 110, and the water pump 220 is not in direct contact with the external space, so that the water pump 220 can be protected, and the damage to the water pump 220 caused by the collision of the water pump 220 is avoided.

The split heat pump water heater provided by the embodiment comprises a heating water tank 7 and the outdoor unit 6. The heating water tank 7 is provided with a water storage cavity, and a hot water outlet 702 communicated with the water storage cavity is arranged on the heating water tank 7. The first water supply port 212 of the circulation pressurization module 200 is communicated with the water storage cavity through a pipeline to supply water to the water storage cavity.

Specifically, the heating water tank 7 includes an outer case 710 and an inner container disposed inside the outer case 710, the inner container forming a water storage chamber therein. The shell 710 is provided with a cold water inlet 701 which is communicated with the liner, and the first water supply port 212 of the circulating pressurization module 200 is connected with the cold water inlet 701 on the shell 710 through a pipeline, so that the purpose of supplying water into the liner is realized.

The outer wall of the inner container is wound with a water tank heat exchanger, wherein the circulating working medium is converted into liquid from gas, and the liquid is heated by heat released to heat water in the inner container, so that the temperature of the water in the heating water tank 7 is increased. The working medium inlet 703 and the working medium outlet 704 communicated with the water tank heat exchanger extend out of the casing 710 so as to be connected with the working medium outlet 112 and the working medium inlet 111 of the outdoor unit 6 through pipelines, respectively.

The hot water outlet 702 is arranged on the shell 710 and is communicated with the inner container, and along with the process that cold water is injected into the inner container, the water heated in the inner container can flow out through the hot water outlet 702 under the action of water pressure and is conveyed to each water using point through the hot water pipe, so that hot water supply is realized. Since the cold water entering the inner container is pressurized water passing through the water pump 220, pressurization of hot water supply is achieved. In the circulating pressurization module 200, the reversing valve 270 communicates the second water supply port 213 with the water outlet end 222 of the water pump 220, and pressurized cold water is directly supplied to each water using point through the cold water pipe from the second water supply port 213, so that the pressurization of cold water supply is realized at the same time.

When the reversing valve 270 connects the second water supply port 213 with the water inlet 221 of the water pump 220, the cold water remaining in the hot water pipe can be pumped back to the circulating pressurization module 200 through the cold water pipe by the water pump 220, and then flows out of the first water supply port 212 to be conveyed to the heating water tank 7 for reheating. The mode can avoid the condition that a large amount of cold water needs to be discharged at the water consumption point when a user uses hot water, and the zero-cold-water effect of hot water use is realized.

In this embodiment, the circulation pressurization module 200 is integrated with the outdoor unit 6 of the heat pump water heater, and the reversing valve 270 is disposed therein to control the communication direction of the water path. The external water source is directly connected to the water inlet 211, and when the direction change valve 270 communicates the second water supply port 213 with the water outlet end 222 of the water pump 220, water pressurized by the water pump 220 can be respectively sent out from the first water supply port 212 and the second water supply port 213, and then respectively used for cold water supply, and water is supplied to the heating water tank 7 to realize hot water supply, thereby realizing the pressurization function of the whole water path. When the reversing valve 270 communicates the second water supply port 213 with the water inlet 221 of the water pump 220, the cold water remaining in the hot water pipe is pumped in from the second water supply port 213 after passing through the cold water pipe, and is sent out again from the first water supply port 212 after passing through the water pump 220, and enters the heating water tank 7 to be heated, thereby realizing the function of zero cold water.

Above scheme on the one hand can realize full water route pressure boost and zero cold water function simultaneously through a water pump 220, has simplified the waterway structure. On the other hand, the circulating boost module 200 including the water pump 220 and the reversing valve 270 is integrally disposed on the outdoor unit 6, so that the installation is convenient, and the power can be uniformly supplied and controlled by the outdoor unit 6, so that the use is convenient.

Example two

As shown in fig. 1 to fig. 6, the present embodiment provides a hot water system, which includes the heat pump water heater according to the first embodiment, and a plurality of water consumption points 5, the water inlet 211 of the circulation pressurization module 200 is connected to an external water source, and the hot water outlet 702 is connected to each water consumption point 5 through the hot water pipe 3.

The hot water system further includes a cold water pipe 4 connected to each water consumption point 5, and the cold water pipe 4 is connected to the second water supply port 213 of the circulation pressurizing module 200. The hot water pipe 3 communicates with the cold water pipe 4 at each water usage point 5.

In the above scheme, the outdoor unit 6 is directly installed at the water inlet of the whole house and connected with an external water source. Specifically, water in a tap water well is pumped into a water storage tank in the home of a user for storage, and when the user needs water, the water is supplied into a water supply main pipe 1 in the home of the user through the water storage tank. In this embodiment, the water inlet 211 of the circulating pressurization module 200 is directly connected to the water supply main 1 connected to the water outlet of the water storage tank.

When the full water path pressurization function is realized, the control reversing valve 270 communicates the second water supply port 213 with the water outlet end 222 of the water pump 220, and after external water enters the circulating pressurization module 200, the external water is pressurized by the water pump 220 and then is respectively conveyed to the first water supply port 212 and the second water supply port 213. The first water supply port 212 is connected to a cold water inlet 701 of the heating water tank 7 through a connection pipe 2 to supply water to the heating water tank 7, and at the same time, hot water in the inner container of the heating water tank 7 is supplied into the hot water pipe 3 by water pressure. The second water supply port 213 is directly connected to the cold water pipe 4, and supplies pressurized cold water to the cold water pipe 4 (the flow direction of water in the cold water pipe 4 is shown by a solid arrow in fig. 6). Hot water and cold water are respectively conveyed to a water consumption point 5 through a hot water pipe 3 and a cold water pipe 4, and water with proper temperature is obtained after mixing through a water mixing valve at the water consumption point 5 for a user to use.

When the zero cold water function is realized, the reversing valve 270 is controlled to communicate the second water supply port 213 with the water inlet end 221 of the water pump 220, and a suction force is generated at the second water supply port 213 towards the inside of the circulating pressurization module 200, so that the water in the cold water pipe 4 flows in the reverse direction (the flow direction of the water flow in the cold water pipe 4 is shown by a dotted arrow in fig. 6). Meanwhile, the residual cold water in the hot water pipe 3 enters the cold water pipe 4 through the water mixing valve at the water consumption point 5, enters the circulating pressurization module 200 through the second water supply port 213, is finally sent out from the first water supply port 212 under the action of the water pump 220, enters the heating water tank 7 again for heating, and meanwhile, the hot water in the heating water tank 7 is sent into the hot water pipe 3, so that the condition that a large amount of cold water needs to be discharged at the water consumption point 5 is avoided.

The hot water system of this embodiment is through the setting and subsequent tube coupling of the off-premises station 6 that the integration has circulation pressure boost module 200, through a water pump 220 and switching-over valve 270's cooperation, both can realize the effect to the pressure boost of rivers simultaneously in two pipelines of cold water pipe 4 and hot-water line 3, can also realize the zero cold water function of hot water supply, has improved user's water experience. The scheme of this embodiment is few to the transformation in current water route, and the transformation is with low costs, easily realizes.

EXAMPLE III

As shown in fig. 1, the present embodiment is different from the first embodiment in that: the first water supply pipe sequentially comprises a first water outlet section, a preheating section and a second water outlet section from a first water supply port 212 on the housing 210 to the water outlet end of the water pump, and the preheating section is arranged inside the box body 110 of the outdoor heat exchange module 100.

Specifically, a heat exchange device is arranged in the box body 110, and the preheating section passes through the heat exchange device to exchange heat with the heat exchange device, so that preheating of water flow in the preheating section is realized. Because the outdoor unit 6 is installed outside the user's house, especially in winter with low outside environmental temperature, the water in the water inlet pipe can be prevented from freezing into ice by the arrangement of the preheating section, and even the water inlet pipe can be prevented from being frozen.

In this embodiment, heat transfer device sets up near the region at the inside compressor place of box 110, can absorb the heat of the effluvium in the compressor working process, gives the rivers in the preheating section with the heat transfer that absorbs again, realizes preheating to rivers.

In detail, the top surface of the box 100 in the interior of the housing 210 is provided with a first through hole and a second through hole, the water inlet end of the preheating section extends out of the box 100 from the first through hole, and the water outlet end of the preheating section extends out of the box 110 from the second through hole. The second water outlet section is connected to the water outlet end of the water pump and horizontally extends backwards until being connected with the water inlet end of the preheating section. The first water outlet section extends from the water outlet end of the preheating section to the right horizontally to be connected with a first water supply port 212.

In this embodiment, the second opening of the reversing valve is still connected to the first water outlet section, and when the second opening and the third opening of the reversing valve are communicated to realize the full water path pressurization function, all the water pressurized by the water pump passes through the preheating section and then is respectively conveyed to the first water supply port 212 through the second water outlet section, and is conveyed to the second water supply port 213 through the reversing valve and the second water supply pipe.

When the outdoor unit 6 of this embodiment is in operation, the second opening of the reversing valve is communicated with the third opening, and external water enters the circulating pressurizing module 200 through the water inlet 211, flows through the water inlet pipe, is pressurized by the water pump, and then enters the preheating section located in the box body 110 through the second water outlet section. When the water flows through the preheating section, the water flows exchange heat with the heat exchange device inside the box body 110 to realize preheating, the temperature of the water flows is prevented from being too low, and particularly the water flows can be prevented from being frozen when the outdoor environment temperature is low. The water flow enters the first water outlet section after passing through the preheating section, part of the water flow is conveyed to the first water supply port 212 along the first water outlet section, and then water is supplied to the heating water tank 7, and the other part of the water flow is conveyed to the second water supply port 213 through a reversing valve connected to the first water outlet section, and cold water supply is directly carried out.

When the first opening of the reversing valve is communicated with the third opening, the water in the hot water pipe can flow back to the circulating pressurization module 200 through the water mixing valve, the cold water pipe and the second water supply opening 213 in sequence under the suction action of the water pump, enters the water inlet pipe through the reversing valve, is sent to the second water outlet section after being pressurized by the water pump, is preheated through the preheating section, and finally is sent out from the first water supply opening 212 through the first water outlet section and enters the heating water tank 7 again for heating, so that the zero cold water function is realized. Rivers preheat earlier and get into heating water tank 7 in, avoid rivers temperature to hang down and cause the influence to the bulk temperature of water storage in heating water tank 7, need wait for the condition of longer time when leading to using hot water.

The embodiment further provides a heat pump water heater comprising the outdoor unit 6, and the connection mode of the outdoor unit 6 and the heating water tank 7 in the heat pump water heater is the same as that in the first embodiment, and is not described again.

As shown in fig. 6, in this embodiment, a hot water system including the heat pump water heater is further provided, the water inlet 211 of the circulation pressurization 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 consumption point 5 through the hot water pipe 3. And the cold water pipe 4 is also connected with each water using point 5, and the cold water pipe 4 is connected with the second water supply port 213 of the circulating pressurization module 200.

In this embodiment, when the user has a demand for water, if the water pressure of the external water source is low, the second opening of the reversing valve is communicated with the third opening, the external water supply enters the circulating pressurization module 200 through the water inlet 211, is pressurized by the water pump, and then can preheat the water flow through the first water supply pipe, especially through the preheating section of the first water supply pipe, and finally flows out through the first water supply port 212 and the second water supply port 213, and further respectively enters the communication pipeline 2 and the cold water pipe 4, and the communication pipeline 2 then conveys the water flow to the heating water tank 7, so that the hot water in the heating water tank 7 flows out through the hot water outlet 702 to be subjected to the hot water pipe 3. Through the mode, the water supply device can preheat before external water supply enters the cold water pipe 4 and the heating water tank 7, prevents the water supply temperature from being too low, and can simultaneously pressurize water flows in two pipelines of the cold water pipe 4 and the hot water pipe 3.

When a user does not use hot water for a long time, the first opening of the reversing valve is communicated with the third opening, water in the cold water pipe 4 reversely flows, and cold water remained in the hot water pipe 3 sequentially passes through the water mixing valve, the cold water pipe 4 and the second water supply opening 213 to enter the circulating pressurization module 200, then enters the water inlet pipe through the reversing valve, is pressurized by the water pump, then is sent into the second water outlet section, then is preheated through the preheating section, and finally flows out from the first water supply opening 212 through the first water outlet section to return to the heating water tank 7 again, so that the situation that the user discharges a large amount of cold water at the water using point 5 can be avoided, and the zero cold water function is realized. Meanwhile, the circulating water flow passes through the preheating section to be preheated before entering the heating water tank 7, and particularly when the outdoor temperature is low, the situation that the water temperature is too low or even freezes can be better prevented, the zero-cold-water effect is better, and the water using experience of a user is improved.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The outdoor unit of the heat pump water heater is characterized by comprising an outdoor heat exchange module and a circulating pressurization module, wherein the circulating pressurization module comprises a water pump, a water inlet connected with an external water source and a first water supply port for supplying pressurized water to the outside; the water inlet end of the water pump is communicated with the water inlet, and the water outlet end of the water pump is communicated with the first water supply port;

the circulating pressurization module further comprises a second water supply port, and the second water supply port is communicated with the water inlet end and the water outlet end of the water pump through one switching mechanism.

2. The outdoor unit of a heat pump water heater of claim 1, wherein the circulating pressurizing module further comprises a water inlet pipe connecting the water inlet port with the water inlet end of the water pump, and a first water supply pipe connecting the first water supply port with the water outlet end of the water pump; the second water supply port is communicated with the water inlet pipe and the first water supply pipe through one selection of the reversing mechanism.

3. The outdoor unit of a heat pump water heater of claim 2, wherein the direction changing mechanism includes a direction changing valve including a first opening communicating with the water inlet pipe, a second opening communicating with the first water supply pipe, and a third opening communicating with the second water supply port, and a direction changing member controlling the third opening to select one of the first opening and the second opening;

preferably, a first branch connected with a first opening of the reversing valve is arranged on the water inlet pipe, and a second branch connected with a second opening of the reversing valve is arranged on the first water supply pipe.

4. The outdoor unit of a heat pump water heater of claim 3, wherein the first water supply pipe comprises a first water outlet section connected to the first water supply inlet, and a second water outlet section connecting the first water outlet section and the water outlet end of the water pump;

the first water outlet section extends for a certain length from the first water supply port along the direction opposite to the water outlet direction, and the second water outlet section is perpendicular to the first water outlet section and extends from the extending tail end of the first water outlet section to the direction of the water pump to be connected with the water outlet end of the water pump; and the second opening of the reversing valve is communicated with the first water outlet section.

5. The outdoor unit of a heat pump water heater of claim 4, wherein the inlet pipe is disposed in parallel with the first water outlet section of the first water supply pipe, and the direction changing valve is disposed in a spacing region between the inlet pipe and the first water outlet section;

preferably, the second water supply port is communicated with the third opening of the reversing valve through a second water supply pipe, and the second water supply pipe is arranged in an interval area between the water inlet pipe and the first water outlet section of the first water supply pipe and is parallel to the water inlet pipe.

6. The outdoor unit of the heat pump water heater according to any one of claims 1 to 5, wherein the outdoor heat exchange module comprises a casing and an outdoor heat exchanger disposed in the casing, and the circulation pressurization module is mounted on an outer wall of the casing;

preferably, a working medium inlet and a working medium outlet which are communicated with the outdoor heat exchanger are formed in the outer wall of one side of the box body, and the opening directions of the water inlet, the first water supply port and the second water supply port face to the side where the working medium inlet and the working medium outlet are located;

preferably, the circulating pressurization module is installed on the top surface of the box body, and the installation position of the circulating pressurization module is close to one side where the working medium inlet and the working medium outlet are located.

7. The outdoor unit of a heat pump water heater of claim 6, wherein a fixing bracket is provided on a top surface of the cabinet, and the water pump is installed on the fixing bracket;

preferably, the fixing bracket comprises a fixing part connected to the top surface of the box body, and a mounting part formed by extending upwards from the fixing part, and the water pump is mounted on the mounting part;

preferably, a certain interval is arranged between the bottom of the water pump and the top surface of the box body.

8. The outdoor unit of the heat pump water heater of claim 6 or 7, wherein the circulation pressurization module further comprises a housing installed on a top surface of the cabinet, the water pump is disposed inside the housing, and the water inlet, the first water supply port and the second water supply port are disposed on the housing.

9. A heat pump water heater comprising a heating water tank and the outdoor unit of any one of claims 1 to 8, wherein the heating water tank has a water storage chamber, and a hot water outlet communicated with the water storage chamber is provided in the heating water tank; and a first water supply port of the circulating pressurization module is communicated with the water storage cavity through a pipeline to supply water to the water storage cavity.

10. A hot water system, comprising the heat pump water heater according to claim 9 and a plurality of water consumption points, wherein the water inlet of the circulating pressurization module is connected with an external water source, and the hot water outlet is connected with each water consumption point through a hot water pipe;

the hot water system also comprises a cold water pipe connected with each water consumption point, and the cold water pipe is connected with a second water supply port of the circulating pressurization module; the hot water pipe and the cold water pipe are communicated at each water using point.

Images