CN220168638U - Switching valve and hot water supply system - Google Patents

Abstract

The utility model provides a switching valve and a hot water supply system, comprising a valve body and a valve core, wherein a cavity is formed in the valve body, at least four channels communicated with the cavity are formed in the valve body, and first ends of the at least four channels are arranged at intervals along the first circumference of the cavity; the valve core is rotatably arranged in the cavity, a sealing end face is formed on the valve core, a through part is formed on the sealing end face and used for communicating any two channels, and the sealing end face is used for sealing off the remaining channels. The utility model relates to a valve and a hot water supply system, which can be used for conveniently and selectively switching between an electric water heater or a gas water heater and solar energy provided hot water, and more solar energy is used for providing hot water when the solar energy hot water is sufficient, so that the use cost of the hot water is reduced while the use of the hot water is ensured, the energy is saved, and electric heating is adopted when the solar energy is insufficient.

Description

Switching valve and hot water supply system

Technical Field

The utility model belongs to the technical field of liquid conveying, and particularly relates to a switching valve and a hot water supply system.

Background

Along with the continuous improvement of living standard, the requirements of people on living quality are also improved. When summer comes, a large amount of hot water is needed for bathing; when winter is temporary, hot water is needed for washing clothes and cooking, so that the damage to the body caused by water cooling is avoided.

However, the electric heating or the fuel gas is independently adopted as the energy source to heat the water, so that the cost is high, and more energy sources are wasted. If the electric water heater is turned on when the hot water is needed, a long time is needed to wait, and instant heating cannot be realized. If the electric water heater is kept in an on state, more energy sources are wasted, and the use cost is further increased. If solar energy is adopted alone as the energy to heat water, when illumination is insufficient, the problem that the temperature of the water outlet cannot meet the requirements of users is caused.

Therefore, the switching valve and the hot water supply system are developed, convenient selective switching can be performed between the electric water heater and the solar hot water supply, when the solar hot water is sufficient, more solar energy is used for supplying hot water, the use cost is reduced while the use of the hot water is ensured, and the energy is saved, so that the hot water supply system is a technical problem to be solved urgently.

Disclosure of Invention

The utility model provides a switching valve and a hot water supply system, aiming at the problems that in the prior art, the use cost is increased and energy is wasted due to the fact that the domestic hot water is provided by adopting electric heat alone, and the hot water cannot be provided under the condition of insufficient illumination by using solar energy alone.

In order to achieve the above-mentioned utility model/design purpose, the utility model adopts the following technical scheme to realize:

in one aspect, the utility model provides a switching valve, comprising a valve body and a valve core, wherein a cavity is formed in the valve body, at least four channels communicated with the cavity are formed in the valve body, and first ends of the at least four channels are arranged at intervals along a first circumference of the cavity; the valve core is rotatably arranged in the cavity, a sealing end face is formed on the valve core, a through part is formed on the sealing end face and is used for communicating any two channels, and the sealing end face is used for blocking the rest channels.

In some embodiments of the present utility model, the through portion includes a first groove and a second groove, the first groove is opened along a radial extension of a second circumference of the sealing end surface, the second groove is opened along a circumferential extension of the second circumference of the sealing end surface, the first circumference is the same as the second circumference in diameter and corresponds in position, and the valve core rotates around a center of the second circumference.

In some embodiments of the utility model, both ends of the first slot are in communication with the first ends of any opposing two of the channels; the two ends of the second groove are communicated with the first ends of any two adjacent channels.

In some embodiments of the utility model, the plurality of channels includes a first channel, a second channel, a third channel, and a fourth channel, the first end of the first channel, the first end of the second channel, the first end of the third channel, and the first end of the fourth channel being evenly spaced along the first circumference; one end of the first groove is communicated with the middle part of the second groove.

In some embodiments of the utility model, the length of the first groove is not less than the diameter of the first circumference; the length of the second groove is greater than or equal to one fourth of the circumference of the first circumference and less than one half of the circumference of the first circumference.

In some embodiments of the present utility model, a first through hole, a second through hole, a third through hole and a fourth through hole are formed on the inner wall of the cavity along the first circumference; the side wall of the valve body is provided with a first outlet, a second outlet, a third outlet and a fourth outlet at intervals along the circumferential direction of the side wall of the valve body; the first through hole is communicated with the first outlet to form the first channel, the second through hole is communicated with the second outlet to form the second channel, the third through hole is communicated with the third outlet to form the third channel, and the fourth through hole is communicated with the fourth outlet to form the fourth channel.

In some embodiments of the present utility model, the driving assembly further includes a stepper motor and a connection shaft, and the stepper motor drives the through part to rotate around the center of the second circumference through the connection shaft.

In another aspect, the utility model also provides a hot water supply system, which comprises the valve, an electric water heater water inlet pipeline, an electric water heater water outlet pipeline, a solar energy communication pipeline, a cold water inlet main pipeline and a hot water outlet main pipeline; the first outlet is communicated with the water inlet pipeline of the electric water heater, the second outlet is communicated with the solar communication pipeline, the third outlet is communicated with the cold water inlet pipeline, the fourth outlet is communicated with the hot water outlet pipeline, and the water outlet pipe of the electric water heater is communicated with the hot water outlet pipeline.

In some embodiments of the utility model, a water pump is connected in the solar connecting pipeline.

In some embodiments of the present utility model, two ends of the second tank are respectively communicated with the cold water inlet main pipeline and the solar communication pipeline, and water flows from the cold water inlet main pipeline into the solar communication pipeline; the two ends of the first groove are respectively communicated with the hot water outlet main pipeline and the solar energy communication pipeline, and water flows from the solar energy communication pipeline into the hot water outlet main pipeline; the two ends of the second groove are respectively communicated with the water inlet pipeline and the solar communication pipeline of the electric water heater, and water flows from the solar communication pipeline to the water outlet pipeline of the electric water heater and the water inlet pipeline of the electric water heater; the two ends of the first groove are respectively communicated with the cold water inlet main pipeline and the water inlet pipeline of the electric water heater, and water flows from the cold water inlet main pipeline to the water inlet pipeline of the electric water heater.

Compared with the prior art, the utility model has the advantages and positive effects that:

through arranging at least four channels on the valve body, the valve core is arranged in a cavity in the valve body, the valve core is provided with a sealing end face and a through part arranged on the sealing end face, the valve core rotates relative to the cavity, so that the through part is communicated with any two channels, the sealing end face seals the rest channels, and the valve core rotates to different positions relative to the valve body, so that the communication of different channels is realized;

the water inlet pipeline, the water outlet pipeline, the solar energy communication pipeline, the cold water inlet main pipeline and the hot water outlet main pipeline of the electric water heater are communicated through the valves, and the functions of independently providing hot water by the electric water heater, independently providing hot water by the solar energy, serially providing hot water by the solar energy of the electric water heater, feeding water by the solar energy and the like are realized by rotating the valve core.

Other features and advantages of the present utility model will become apparent upon review of the detailed description of the utility model in conjunction with the drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram showing a structure in which a second channel communicates with a third channel according to a first embodiment of a switching valve according to the present utility model;

FIG. 2 is a schematic illustration showing a first embodiment of a switching valve according to the present utility model in which a second channel communicates with a third channel;

FIG. 3 is a schematic diagram showing a structure in which a second channel and a fourth channel of a first embodiment of a switching valve according to the present utility model are in communication;

FIG. 4 is a schematic illustration showing a first embodiment of a switching valve according to the present utility model in which a second channel communicates with a fourth channel;

FIG. 5 is a schematic illustration showing a structure in which a first channel and a second channel of a first embodiment of a switching valve according to the present utility model are in communication;

FIG. 6 is a schematic illustration showing a first passage communicating with a second passage of a first embodiment of a switching valve according to the present utility model;

FIG. 7 is a schematic illustration showing a structure in which a first channel and a third channel of a first embodiment of a switching valve according to the present utility model are communicated;

FIG. 8 is a schematic illustration showing a first channel communicating with a third channel of a first embodiment of a switching valve according to the present utility model;

FIG. 9 is a schematic diagram of a second embodiment of a water heating system according to the present utility model;

in the drawing the view of the figure,

100, valve body;

110, a cavity;

121, a first channel;

122, a second channel;

123, a third channel;

124, fourth channel;

131, a first through hole;

132, a second through hole;

133, a third through hole;

134, fourth through hole;

141, a first outlet;

142, a second outlet;

143, a third outlet;

144, fourth outlet;

210, a pump;

220, a through part;

221, a first groove;

222, a second groove;

310, solar energy;

320, electric water heater;

410, an electric water heater water inlet pipeline;

420, a water outlet pipeline of the electric water heater;

430, solar communication pipelines;

440, a cold water inlet main pipeline;

450, hot water outlet main pipeline.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In the description of the embodiments, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Example 1

In the present embodiment, a switching valve is provided, which includes a valve body 100 and a valve element, as shown in fig. 1, 2, 3, 4, 5, 6, 7, and 8. Through the rotation of the valve core relative to the valve body 100, the valve core rotates to different positions relative to the valve body 100, and the communication of different passages in the valve body 100 is realized.

In the present embodiment, a cavity 110 is formed in the valve body 100. At least four passages communicating with the cavity 110 are formed in the valve body 100.

One end of the passage communicates with the cavity 110 and the other end of the passage extends to the side wall of the valve body 100. The liquid in the cavity 110 can flow out of the valve body 100 through the passage.

At least four passages are circumferentially spaced within the valve body 100.

In this embodiment, the first ends of at least four channels are spaced apart along a first circumference of the cavity 110.

The valve spool is rotatably mounted within the cavity 110.

The valve core is provided with a sealing end face. The sealing end surface abuts against the inner wall of the cavity 110.

The sealing end face is used for sealing the first end of the channel.

The seal end face is provided with a through portion 220.

Communication between the plurality of passages may be achieved when the through portion 220 communicates with the first ends of the plurality of passages during rotation of the valve core relative to the valve body 100. So that water can flow between the plurality of channels.

In this embodiment, the through portion 220 is used for communicating any two channels, and the sealing end face is used for blocking the remaining channels.

Specifically, the through portion 220 includes a first groove 221 and a second groove 222. The first groove 221 is opened in the radial direction of the second circumference on the seal end surface. The second groove 222 opens in the circumferential direction of the second circumference on the seal end face.

The second circumference is formed on the sealing end face. The second circumference corresponds to the first circumference position. I.e. the center of the second circumference is coaxially arranged with the center of the first circumference. The first circumference is the same diameter as the second circumference.

The valve core rotates relative to the center of the second circumference. So that the first ends of any adjacent two channels can communicate through the second groove during rotation of the spool. The first ends of any opposing two channels can communicate through the first slot.

In the present embodiment, the number of channels is not particularly limited, and in particular, in the present embodiment, the number of channels is 4 as an example, the description will be made.

The plurality of channels includes a first channel 121, a second channel 122, a third channel 123, and a fourth channel 124. The first ends of the first, second and third channels 121, 122, 123 and 124 are uniformly spaced apart along the first circumference.

Specifically, the included angle between two adjacent channels in the first channel 121, the second channel 122, the third channel 123 and the fourth channel 124 is 90 °.

Specifically, the first channel 121, the second channel 122, the third channel 123, and the fourth channel 124 are sequentially opened for illustration.

Whether or not the first groove 221 and the second groove 222 communicate is not limited in this embodiment. The first groove 221 and the second groove 222 may not be in communication, or may be in communication.

In this embodiment, the first groove 221 and the second groove 222 are communicated with each other.

Specifically, one end of the first groove 221 communicates with the middle of the second groove 222.

The length of the first groove 221 is not less than the diameter of the first circumference, that is, the length of the first groove 221 is greater than or equal to the diameter of the first circumference. Thus, the two ends of the first groove 221 can be communicated with two opposite channels, namely, the two ends of the first groove 221 are respectively communicated with the first channel 121 and the third channel 123, so that the first channel 121 is communicated with the third channel 123.

After the valve core is rotated by 90 degrees relative to the valve body 100, two ends of the first groove 221 are respectively communicated with the second channel 122 and the fourth channel 124, so that the second channel 122 is communicated with the fourth channel 124.

Since the second groove 222 is used to communicate any adjacent two passages and does not communicate with adjacent three passages, the length of the second groove 222 is equal to or greater than one fourth of the circumference of the first circumference and less than one half of the circumference of the first circumference.

So that the two ends of the second groove 222 are communicated with the two adjacent channels, that is, the two ends of the second groove 222 are respectively communicated with the first channel 121 and the second channel 122.

After the valve core is rotated by 90 degrees relative to the valve body 100, two ends of the second groove 222 are respectively communicated with the second channel 122 and the third channel 123, so that the second channel 122 is communicated with the third channel 123; after rotating for 90 degrees, two ends of the second groove 222 are respectively communicated with the third channel 123 and the fourth channel 124, so that the third channel 123 is communicated with the fourth channel 124; after rotating for 90 degrees, two ends of the second groove 222 are respectively communicated with the fourth channel 124 and the first channel 121, so that the fourth channel 124 is communicated with the first channel 121.

At this time, since the end of the first groove 221 communicates with the middle of the second groove 222, the spool is rotated, and the first groove 221 communicates with the plurality of passages at intervals.

In the present embodiment, first through holes 131, second through holes 132, third through holes 133, and fourth through holes 134 are provided on the inner wall of the cavity 110 at intervals along the circumferential direction of the first circumference.

A first outlet 141, a second outlet 142, a third outlet 143, and a fourth outlet 144 are provided on a sidewall of the valve body 100 at intervals in the circumferential direction thereof.

The first through hole 131 communicates with the first outlet 141 to form the first passage 121. The first channel 121 may be opened in a radial direction of the valve core, or may be opened in other directions.

The second through hole 132 communicates with the second outlet 142 to form the second passage 122. The second channel 122 may extend in a radial direction of the valve core, or may extend in other directions.

The third through hole 133 communicates with the third outlet 143 to form a third passage 123. The third passage 123 may be opened to extend in the radial direction of the valve element, or may be opened to extend in other directions.

The fourth through hole 134 communicates with the fourth outlet 144 to form the fourth passage 124. The fourth passage 124 may extend in the radial direction of the spool, or may extend in other directions.

Here, the first, second, and third passages 121, 122, 123 are not in communication with the fourth passage 124, thereby preventing water flow therein.

In this embodiment, a driving assembly is further included, and the driving assembly drives the valve core to rotate relative to the valve body 100.

Specifically, the drive assembly includes a stepper motor and a connecting shaft. The stepping motor drives the valve core to rotate through the connecting shaft.

Specifically, the driving signal of the stepping motor is a pulse signal.

Example two

In this embodiment, a hot water supply system is concerned, which comprises a valve of one of the mentioned embodiments.

In the present embodiment, the valve body 100 is described as including 4 passages.

As shown in fig. 9, the water heating system in this embodiment includes a water inlet pipeline 410 of the electric water heater, a water outlet pipeline 420 of the electric water heater, a solar communication pipeline 430, a cold water inlet pipeline 440 and a hot water outlet pipeline 450 in addition to the valve in the first embodiment.

The other water consumption points are respectively communicated with the cold water inlet main pipeline 440 and the hot water consumption main pipeline 450.

The first outlet 141, the second outlet 142, the third outlet 143, and the fourth outlet 144 are provided on the valve body in the clockwise direction.

The first outlet 141 communicates with an electric water heater inlet line communication 410. The second outlet 142 communicates with the solar communication line 430. The third outlet 143 communicates with a cold water inlet header 440. The fourth outlet 144 communicates with a hot water outlet header 450.

In this embodiment, as shown in fig. 1, 5 and 9, two ends of the second tank 122 are respectively communicated with the second outlet 142 and the third outlet 143, so as to realize that the solar communication pipeline 430 is communicated with the cold water inlet main pipeline 440, and the other end of the cold water inlet main pipeline 440 is communicated with a tap water source, so as to realize solar water feeding, and tap water flows from the cold water inlet main pipeline 440 through the solar communication pipeline 430 and flows into solar energy.

In this embodiment, as shown in fig. 2, 6 and 9, the valve core rotates 45 degrees clockwise relative to the valve body 100, and two ends of the first groove 211 are respectively communicated with the second outlet 142 and the fourth outlet 144, so that the solar communication pipeline 430 is communicated with the hot water outlet main pipeline 450 through the first groove 211, and hot water in the solar energy 310 is output to other water using points connected into the hot water outlet main pipeline 450.

In this case, if the electric water heater is not in the on state, the solar energy 310 alone supplies hot water to the hot water outlet main pipe 450. If the electric water heater is in the on state, the pipeline is independently arranged to be communicated with the cold water inlet main pipeline 440 and the electric water heater water inlet pipeline 410, and the electric water outlet pipeline 420 and the hot water outlet main pipeline 450 are communicated, so that the solar energy 310 and the electric water heater are connected in parallel, and hot water is provided for the hot water outlet main pipeline 450.

In this embodiment, as shown in fig. 3, 7 and 9, the valve core rotates 45 ° clockwise relative to the valve body 100, and two ends of the second groove 212 are respectively communicated with the first outlet 141 and the second outlet 142, so as to realize the communication between the solar communication pipeline 430 and the water inlet pipeline communication 410 of the electric water heater. The water flowing out from the solar energy 310 flows into the electric water heater, if the target set temperature is reached after the water is mixed in the electric water heater, the electric water heater is not required to be heated, and directly flows through the water outlet pipeline 420 of the electric water heater to the water outlet main pipeline 450, so that other water using points connected into the water outlet main pipeline 450 are supplied; if the target set temperature is not reached after mixing in the electric water heater, the electric water heater heats again and flows into the hot water outlet main pipeline 450, so that the series connection of the electric water heater 320 and the solar energy 310 is realized. The solar energy 310 is used in series with the electric water heater 320, which can solve the problem of zero cold water in the pipeline.

In this embodiment, as shown in fig. 4, 8 and 9, the valve core rotates 45 ° clockwise relative to the valve body 100, and two ends of the first groove 211 are respectively communicated with the first outlet 141 and the third outlet 143, so as to realize the communication between the water inlet pipeline 410 of the electric water heater and the water inlet main pipeline 440 of the cold water. Thereby realizing that the water flow in the cold water inlet main pipeline 440 flows into the water inlet pipeline 410 of the electric water heater, then flows into the electric water heater, is heated by the electric water heater, the water outlet pipeline 420 of the electric water heater is communicated with the hot water outlet main pipeline 450, and the water flow heated by the electric water heater flows out from the water outlet pipeline 420 of the electric water heater to the hot water outlet main pipeline 450.

In this case, if the solar energy 310 is not in the on state, the electric water heater alone supplies hot water to the hot water outlet main pipe 450, which is suitable for use in overcast days. If the solar energy 310 is in the on state, the solar energy communication pipeline 430 is separately arranged to be communicated with the hot water outlet main pipeline 450, that is, the solar energy 310 is connected with the electric water heater in parallel to provide hot water for the hot water outlet main pipeline 450.

The four-position four-way valve can realize multi-energy heat supply of the solar energy 310 and the electric water heater to domestic water, and particularly can realize a plurality of heat supply modes of independent heat supply of the electric water heater, independent heat supply of the solar energy 310, parallel heat supply of the electric water heater and the solar energy 310 and serial heat supply of the electric water heater and the solar energy.

Therefore, electric energy is saved, heat supply efficiency is improved, and heat supply quantity in the process of using a large amount of water is ensured.

In the present embodiment, a water pump 210431 is connected to the solar communication pipe 430, and pressurized water supply can be realized when the solar communication pipe 430 outputs water flow.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. A switching valve, comprising:

the valve body is internally provided with a cavity, at least four channels communicated with the cavity are formed in the valve body, and first ends of the at least four channels are arranged at intervals along the first circumference of the cavity;

the valve core is rotatably arranged in the cavity, a sealing end face is formed on the valve core, a through part is formed on the sealing end face and is used for communicating any two channels, and the sealing end face is used for blocking the rest channels.

2. The switching valve according to claim 1, wherein the through portion includes a first groove and a second groove, the first groove is opened along a radial extension of a second circumference of the sealing end surface, the second groove is opened along a circumferential extension of the second circumference of the sealing end surface, the first circumference is the same as a diameter of the second circumference and corresponds in position, and the valve spool rotates around a center of the second circumference.

3. A switching valve according to claim 2, wherein,

the two ends of the first groove are communicated with the first ends of any two opposite channels;

the two ends of the second groove are communicated with the first ends of any two adjacent channels.

4. A switching valve according to claim 3, wherein,

the plurality of channels comprise a first channel, a second channel, a third channel and a fourth channel, wherein the first end of the first channel, the first end of the second channel, the first end of the third channel and the first end of the fourth channel are uniformly arranged at intervals along the first circumference;

one end of the first groove is communicated with the middle part of the second groove.

5. The switching valve according to claim 4, wherein,

the length of the first groove is not smaller than the diameter of the first circumference;

the length of the second groove is greater than or equal to one fourth of the circumference of the first circumference and less than one half of the circumference of the first circumference.

6. The switching valve according to claim 4, wherein,

a first through hole, a second through hole, a third through hole and a fourth through hole are formed in the inner wall of the cavity along the first circumference;

the side wall of the valve body is provided with a first outlet, a second outlet, a third outlet and a fourth outlet at intervals along the circumferential direction of the side wall of the valve body; the first through hole is communicated with the first outlet to form the first channel, the second through hole is communicated with the second outlet to form the second channel, the third through hole is communicated with the third outlet to form the third channel, and the fourth through hole is communicated with the fourth outlet to form the fourth channel.

7. The switching valve according to claim 4, further comprising a driving assembly including a stepping motor and a connecting shaft, the stepping motor driving the through-portion to rotate around the center of the second circumference through the connecting shaft.

8. A hot water supply system, comprising:

the switching valve of claim 6;

water inlet pipeline of electric water heater;

water outlet pipeline of electric water heater;

solar energy communication pipeline;

a cold water inlet main pipeline;

a hot water outlet main pipeline;

the first outlet is communicated with the water inlet pipeline of the electric water heater, the second outlet is communicated with the solar communication pipeline, the third outlet is communicated with the cold water inlet pipeline, the fourth outlet is communicated with the hot water outlet pipeline, and the water outlet pipe of the electric water heater is communicated with the hot water outlet pipeline.

9. The water heating system according to claim 8, wherein a water pump is connected to the solar connection line.

10. The water heating system according to claim 8, wherein,

the two ends of the second groove are respectively communicated with the cold water inlet main pipeline and the solar energy communication pipeline, and water flows from the cold water inlet main pipeline into the solar energy communication pipeline;

the two ends of the first groove are respectively communicated with the hot water outlet main pipeline and the solar energy communication pipeline, and water flows from the solar energy communication pipeline into the hot water outlet main pipeline;

the two ends of the second groove are respectively communicated with the water inlet pipeline and the solar communication pipeline of the electric water heater, and water flows from the solar communication pipeline to the water outlet pipeline of the electric water heater and the water inlet pipeline of the electric water heater;

the two ends of the first groove are respectively communicated with the cold water inlet main pipeline and the water inlet pipeline of the electric water heater, and water flows from the cold water inlet main pipeline to the water inlet pipeline of the electric water heater.