CN212205037U - Protective structure and water heater - Google Patents
Protective structure and water heater Download PDFInfo
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- CN212205037U CN212205037U CN202020738511.4U CN202020738511U CN212205037U CN 212205037 U CN212205037 U CN 212205037U CN 202020738511 U CN202020738511 U CN 202020738511U CN 212205037 U CN212205037 U CN 212205037U
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Abstract
The utility model relates to a protective structure and water heater. The water heater has protective structure, and protective structure includes: the main pipeline comprises a water inlet pipeline, a heat exchanger and a water outlet pipeline which are sequentially communicated, wherein one end of the water inlet pipeline, which is far away from the heat exchanger, is a first water inlet end; the drainage branch comprises a second water inlet end, a third water inlet end and a drainage end, the second water inlet end is communicated with the water inlet pipeline, and the third water inlet end is communicated with the water outlet pipeline; the first temperature control valve is arranged on the water inlet pipeline, the first temperature control valve is closer to the first water inlet end than the second water inlet end, the second temperature control valve is arranged on the water drainage branch road and positioned between the second water inlet end and the water drainage end, and the third temperature control valve is arranged on the water drainage branch road and positioned between the third water inlet end and the water drainage end; wherein at least part of the water in the main conduit is able to flow under gravity into the drainage branch.
Description
Technical Field
The utility model relates to a water heater technical field especially relates to protective structure and water heater.
Background
In winter and other environments with low temperature, water may expand due to freezing, so that a water pipe is expanded and broken, a water heater breaks down, and even electrical potential safety hazards are brought. In the existing anti-freezing measures of the water heater, either only electric heating anti-freezing or only combustion anti-freezing is adopted, or the combination of the two is adopted. However, these anti-freezing modes all need to be powered on to realize the anti-freezing function, and the reliability is low.
SUMMERY OF THE UTILITY MODEL
Therefore, a protection structure and a water heater with high reliability are needed to be provided.
The scheme of the protective structure is as follows:
a protective structure comprising: the main pipeline comprises a water inlet pipeline, a heat exchanger and a water outlet pipeline which are sequentially communicated, wherein one end of the water inlet pipeline, which is far away from the heat exchanger, is a first water inlet end; the drainage branch comprises a second water inlet end, a third water inlet end and a drainage end, the second water inlet end is communicated with the water inlet pipeline, and the third water inlet end is communicated with the water outlet pipeline; the first temperature control valve is arranged on the water inlet pipeline, the first temperature control valve is closer to the first water inlet end than the second water inlet end, the second temperature control valve is arranged on the drainage branch and is positioned between the second water inlet end and the drainage end, and the third temperature control valve is arranged on the drainage branch and is positioned between the third water inlet end and the drainage end; wherein at least part of the water in the main conduit is able to flow into the drain leg under the influence of gravity.
In one embodiment, the drainage branch comprises a first drainage pipeline and a second drainage pipeline communicated with the first drainage pipeline, the first drainage pipeline comprises the second water inlet end and the third water inlet end, and one end of the second drainage pipeline, which is far away from the first drainage pipeline, is a drainage end.
In one embodiment, the second temperature control valve is disposed in the first drain line, and the third temperature control valve is disposed in the second drain line.
In one embodiment, the water inlet pipeline comprises a first water pipe, the first water pipe is closer to the heat exchanger than the second water inlet end, and the first water pipe is located above the water discharge branch.
In one embodiment, the heat exchanger is located above the drain leg.
In one embodiment, the water outlet pipeline comprises a second water pipe, the second water pipe is closer to the heat exchanger than the third water inlet end, and the second water pipe is located above the water discharge branch.
In one embodiment, a heater is arranged on the water inlet pipeline, the heat exchanger and/or the water outlet pipeline.
In one embodiment, the protection structure further comprises a water pump, the water inlet pipeline, the heat exchanger, the water outlet pipeline, the hot water conveying pipeline and the cold water conveying pipeline are sequentially communicated and matched to form a circulating pipeline, and the water pump is arranged on the circulating pipeline.
In one embodiment, the protection structure further comprises a check valve disposed between the hot water delivery line and the cold water delivery line.
In one embodiment, an inlet of the one-way valve is close to the hot water conveying pipeline, an outlet of the one-way valve is close to the cold water conveying pipeline, and the water pump is used for driving water in the circulating pipeline to sequentially flow through the water inlet pipeline, the heat exchanger, the water outlet pipeline, the hot water conveying pipeline and the cold water conveying pipeline.
In one embodiment, a temperature sensor is disposed on the main pipeline.
In one embodiment, the temperature sensor is disposed in the water outlet pipeline.
The scheme of the protection method is as follows:
a protection method applied to the protection structure, the protection method comprising:
when the first temperature control valve detects that the water temperature is lower than a first preset temperature, the first temperature control valve is closed;
when the second temperature control valve detects that the water temperature is lower than a second preset temperature, the second temperature control valve is opened;
when the third temperature control valve detects that the water temperature is lower than a third preset temperature, the third temperature control valve is opened;
wherein the first preset temperature, the second preset temperature and the third preset temperature are all above the freezing point of water.
In one embodiment, the first preset temperature, the second preset temperature and the third preset temperature are the same.
In one embodiment, a heater is arranged on the water inlet pipeline, the heat exchanger and/or the water outlet pipeline, and a temperature sensor is arranged on the main pipeline;
the protection method further comprises the following steps:
when the temperature of the water in the main pipeline detected by the temperature sensor is lower than a fourth preset temperature, controlling the heater to work;
wherein the fourth preset temperature is above the freezing point of water.
In one embodiment, the step of controlling the heater to operate when the temperature of the water in the main pipeline detected by the temperature sensor is lower than a fourth preset temperature includes:
when the temperature of the water in the main pipeline detected by the temperature sensor is lower than a fourth preset temperature, controlling the heater to work until the temperature of the water in the main pipeline detected by the temperature sensor is higher than a fifth preset temperature;
wherein the fifth preset temperature is higher than the fourth preset temperature.
In one embodiment, the protective structure further comprises a water pump, the water inlet pipeline, the heat exchanger, the water outlet pipeline, the hot water conveying pipeline and the cold water conveying pipeline are sequentially communicated and matched to form a circulating pipeline, the water pump is arranged on the circulating pipeline, and a temperature sensor is arranged on the main pipeline;
the protection method further comprises the following steps:
when the temperature of the water in the main pipeline detected by the temperature sensor is lower than a sixth preset temperature, the water pump is controlled to operate;
wherein the sixth predetermined temperature is above the freezing point of water.
In one embodiment, the protective structure further comprises a heating assembly for heating the heat exchanger;
the protection method further comprises the following steps:
when the temperature of the water in the main pipeline detected by the temperature sensor is lower than a seventh preset temperature, controlling the water pump and the heating assembly to operate until the temperature of the water in the main pipeline detected by the temperature sensor is higher than an eighth preset temperature;
wherein the seventh preset temperature is higher than the freezing point of water, and the eighth preset temperature is higher than the seventh preset temperature.
The scheme of the water heater is as follows:
a water heater comprising a protective structure as described above and/or applying a method of protection as described above.
In the above-mentioned protective structure, protection method and water heater, under the condition of cutting off the power supply, the protective structure can enter into the mechanical protection state. When a temperature sensing device in the first temperature control valve detects that the water temperature is lower than a first preset temperature, the first temperature control valve is closed, and the water inflow of tap water is cut off; when the temperature sensing device in the second temperature control valve detects that the water temperature is lower than a second preset temperature, the second temperature control valve is opened, so that part of water in the water inlet pipeline and the heat exchanger flows into the drainage branch and is discharged through the drainage end of the drainage branch; when the temperature sensing device in the third temperature control valve detects that the water temperature is lower than a third preset temperature, the third temperature control valve is opened, so that part of water in the water outlet pipeline and the heat exchanger flows into the drainage branch and is discharged through the drainage section of the drainage branch. Among the foretell protective structure, even when the outage, first temperature-sensing valve, second temperature-sensing valve and third temperature-sensing valve also can open and close according to the temperature for at least partly water in the whole main line can flow through the drainage branch road, thereby avoid being full of water in whole main line, prevent then that water from expanding the water pipe because of freezing and breaking, the reliability is high.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a water heater according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a water heater according to a second embodiment of the present invention.
Description of reference numerals:
110. a water inlet pipeline; 111. a first water inlet end; 120. a heat exchanger; 130. a water outlet pipeline; 131. a water outlet end; 210. a first drain line; 220. a second drain line; 221. a drainage end; 310. a first temperature control valve; 320. a second temperature control valve; 330. a third temperature control valve; 410. a first heater; 420. a second heater; 430. a third heater; 440. a temperature sensor; 450. a first three-way valve; 460. a second three-way valve; 470. a third three-way valve; 500. a gas pipeline; 501. a gas inlet end; 510. a proportional valve; 520. a segment valve; 530. a burner; 540. fire detecting needles; 550. an ignition needle; 600. a fan; 700. a water pump; 710. a hot water delivery line; 711. a first hot water delivery branch; 712. a second hot water delivery branch; 720. a cold water delivery line; 721. a first cold water delivery branch; 722. a second cold water delivery branch; 730. a one-way valve; 740. a first water mixing valve; 750. a faucet; 760. a second water mixing valve; 770. a shower head.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Example one
As shown in fig. 1, according to the protection structure and the water heater in the first embodiment, the protection structure may be applied to the water heater.
The protection structure includes a main pipeline, a drain branch, a first temperature control valve 310, a second temperature control valve 320, and a third temperature control valve 330.
The main pipeline comprises a water inlet pipeline 110, a heat exchanger 120 and a water outlet pipeline 130 which are sequentially communicated, wherein one end of the water inlet pipeline 110, which is far away from the heat exchanger 120, is a first water inlet end 111, and one end of the water outlet pipeline 130, which is far away from the heat exchanger 120, is a water outlet end 131. The main pipeline is mainly used for heating water for users to use. Under the normal use condition, tap water enters the water inlet pipeline 110 through the first water inlet end 111, then flows into the heat exchanger 120, exchanges heat in the heat exchanger 120, increases the temperature, then flows into the water outlet pipeline 130, and then flows to the water consuming point through the water outlet end 131.
It should be noted that, in the water inlet pipeline 110, one end of the water inlet pipeline 110 is connected to the heat exchanger 120, and the end of the water inlet pipeline 110 away from the water heater refers to the end that is not directly connected to the heat exchanger 120, that is, the end of the water inlet pipeline 110 away from the water heater is the first water inlet end 111; in the water outlet pipeline 130, one end of the water outlet pipeline 130 is connected to the heat exchanger 120, and the end of the water outlet pipeline 130 away from the water heater refers to the end not directly connected to the heat exchanger 120, i.e. the end of the water outlet pipeline 130 away from the water heater is the water outlet end 131.
Specifically, the water heater further has a heating assembly for heating the heat exchanger 120 and a blower 600. The heating assembly comprises a gas pipeline 500, a proportional valve 510 and a segment valve 520 which are sequentially arranged on the gas pipeline 500, a burner 530 which is arranged on the gas pipeline 500 and far away from a gas inlet end 501, an ignition needle 550 and a fire detection needle 540 which are arranged on the burner 530.
The proportional valve 510 is used for controlling the opening and closing of the gas pipeline 500 and the gas flow; the segment valve 520 is used for controlling the on-off of gas communicated to the combustor 530, the fire detection needle 540 and the ignition needle 550 are installed above a fire row of the combustor 530, the ignition needle 550 is used for ignition, and the fire detection needle 540 is used for detecting whether ignition is successful; the heat exchanger 120 is used for absorbing heat generated by combustion of the fuel gas and heating water flowing through the heat exchanger 120; the fan 600 is used for providing air required by gas combustion and removing flue gas after combustion.
Further, the water heater also has a processor, when the processor receives a water consumption signal of a user, the controller firstly controls the fan 600 to start, then controls the ignition needle 550 to ignite, the proportional valve 510 is opened, and then the segment valve 520 opens a corresponding valve as required to convey gas to the burner 530; tap water enters the heat exchanger 120 through the water inlet line 110, exchanges heat in the heat exchanger 120 to increase the temperature, and then flows to a water consuming point through the water outlet line 130.
The water discharge branch includes a second water inlet end, a third water inlet end and a water discharge end 221, the second water inlet end is communicated with the water inlet pipeline 110, the third water inlet end is communicated with the water outlet pipeline 130, the first temperature control valve 310 is disposed on the water inlet pipeline 110, the first temperature control valve 310 is closer to the first water inlet end 111 than the second water inlet end, the second temperature control valve 320 is disposed on the water discharge branch and is located between the second water inlet end and the water discharge end 221, and the third temperature control valve 330 is disposed on the water discharge branch and is located between the third water inlet end and the water discharge end 221. Wherein at least a portion of the water in the water inlet line 110, the heat exchanger 120, and/or the water outlet line 130 is able to flow into the water discharge branch under the influence of gravity.
In the above-mentioned protective structure and water heater, under the circumstances of cutting off power, protective structure can get into mechanical protection state. When the temperature sensing device in the first temperature control valve 310 detects that the water temperature is lower than a first preset temperature, the first temperature control valve 310 is closed, and the water inflow of tap water is cut off; when the temperature sensing device in the second temperature control valve 320 detects that the water temperature is lower than a second preset temperature, the second temperature control valve 320 is opened, so that part of water in the water inlet pipeline 110 and the heat exchanger 120 flows into the drainage branch and is discharged through the drainage end 221 of the drainage branch; when the temperature sensing device in the third temperature control valve 330 detects that the water temperature is lower than the third preset temperature, the third temperature control valve 330 is opened, so that a part of water in the water outlet pipeline 130 and the heat exchanger 120 flows into the drainage branch and is then discharged through the drainage section of the drainage branch. In the protection structure, even when power is off, the first temperature control valve 310, the second temperature control valve 320 and the third temperature control valve 330 can be opened and closed according to water temperature, so that at least part of water in the whole main pipeline can flow out through the drainage branch, the whole main pipeline is prevented from being filled with water, the water pipe is prevented from being expanded and broken due to freezing, and the reliability is high.
It should be noted that the specific values of the first preset temperature, the second preset temperature and the third preset temperature may be the same or different, and may be determined according to actual situations, and generally, the first preset temperature, the second preset temperature and the third preset temperature are all set above 0 ℃ and higher than the freezing point of water.
Specifically, in this embodiment, the first preset temperature, the second preset temperature, and the third preset temperature are all 1 ℃, and of course, the specific temperatures of the first preset temperature, the second preset temperature, and the third preset temperature may be determined according to actual situations.
Further, the drainage branch includes a first drainage pipeline 210 and a second drainage pipeline 220 communicated with the first drainage pipeline 210, the first drainage pipeline 210 includes a second water inlet end and a third water inlet end, the second water inlet end is communicated with the water inlet pipeline 110, the third water inlet end is communicated with the second pipeline, and one end of the second drainage pipeline 220 far away from the first drainage pipeline 210 is a drainage end 221. The second temperature control valve 320 is disposed in the first drain line 210, and the third temperature control valve 330 is disposed in the second drain line 220.
Specifically, the first drain line 210 and the second drain line 220 are in a "T" shape, the second drain line 220 is connected to the first drain line 210 through the first three-way valve 450, the second drain line 220 is located below the first drain line 210, one end of the second drain line 220 is connected to the first drain line 210, and the drain end 221 is an end of the second drain line 220 that is not directly connected to the first drain line 210.
Thus, after the protection structure enters the mechanical protection state, the first temperature control valve 310 is closed, and the second temperature control valve 320 and the third temperature control valve 330 are opened, so that the water in the water inlet pipeline 110, the heat exchanger 120 and the water outlet pipeline 130 can firstly flow into the first water discharge pipeline 210 and then be discharged through the second water discharge pipeline 220, thereby avoiding the water pipe from being broken due to the freezing of the water.
Further, the water inlet pipeline 110 includes a first water pipe, the first water pipe is closer to the heat exchanger 120 than the second water inlet end, and the first water pipe is located above the water discharging branch.
Specifically, the first water pipe is connected to the first water discharge pipe 210 by the second three-way valve 460, the first water pipe is located above the second three-way valve 460, and the first water discharge pipe 210 is located to the left of the second three-way valve 460. So, after protective structure got into mechanical protection state, the water in the first water pipe of inlet channel 110 can flow to first water drainage pipeline 210 under the action of gravity, and then rethread second water drainage pipeline 220 arranges to the external world for do not exist or only exist a small amount of water in the first water pipe, avoid water to freeze and rise and break first water pipe.
Further, the heat exchanger 120 is located above the drain branch. In this way, after the protection structure enters the mechanical protection state, the interior of the heat exchanger 120 can flow to the drainage branch under the action of gravity and then to the outside through the drainage end 221.
Further, the water outlet pipeline 130 includes a second water pipe, which is closer to the heat exchanger 120 than the third water inlet end, and is located above the water discharging branch.
Specifically, the second water pipe is connected to the first drain pipe 210 by a third three-way valve 470, the second water pipe is located above the third three-way valve 470, and the first drain pipe 210 is located to the right of the third three-way valve 470. Thus, after the protection structure enters the mechanical protection state, the water in the second water pipe can flow to the drainage branch under the action of gravity and then is drained to the outside through the drainage end 221.
Further, a heater is disposed on the water inlet line 110, the heat exchanger 120 and/or the water outlet line 130. The heater is used for heating the water inlet pipeline 110, the heat exchanger 120 and/or the water outlet pipeline 130, so that the temperature of water in the water inlet pipeline 110, the heat exchanger 120 and/or the water outlet pipeline 130 is increased, and the water is prevented from freezing to burst the water pipe.
Specifically, the water inlet pipeline 110 is provided with a first heater 410, the heat exchanger 120 is provided with a second heater 420, and the water outlet pipeline 130 is provided with a third heater 430.
Further, a temperature sensor 440 is disposed on the main pipeline, in other words, the temperature sensor 440 is disposed on the water inlet pipeline 110, the heat exchanger 120 and/or the water outlet pipeline 130. The temperature sensor 440 is used to obtain the temperature of the water in the water inlet line 110, the heat exchanger 120, and/or the water outlet line 130.
The application also relates to a protection method which can be applied to the protection structure in the first embodiment, and the protection method comprises the following steps:
when the first temperature control valve 310 detects that the water temperature is lower than the first preset temperature, the first temperature control valve 310 is closed;
when the second temperature control valve 320 detects that the water temperature is lower than a second preset temperature, the second temperature control valve 320 is opened;
when the third temperature control valve 330 detects that the water temperature is lower than the third preset temperature, the third temperature control valve 330 is opened.
In case of a power cut, the shielding structure may enter a mechanically shielded state. When the temperature sensing device in the first temperature control valve 310 detects that the water temperature is lower than a first preset temperature, the first temperature control valve 310 is closed, and the water inflow of tap water is cut off; when the temperature sensing device in the second temperature control valve 320 detects that the water temperature is lower than a second preset temperature, the second temperature control valve 320 is opened, so that part of water in the water inlet pipeline 110 and the heat exchanger 120 flows into the drainage branch and is discharged through the drainage end 221 of the drainage branch; when the temperature sensing device in the third temperature control valve 330 detects that the water temperature is lower than the third preset temperature, the third temperature control valve 330 is opened, so that a part of water in the water outlet pipeline 130 and the heat exchanger 120 flows into the drainage branch and is then discharged through the drainage section of the drainage branch. In the protection structure, even when power is off, the first temperature control valve 310, the second temperature control valve 320 and the third temperature control valve 330 can be opened and closed according to water temperature, so that at least part of water in the whole main pipeline can flow out through the drainage branch, the whole main pipeline is prevented from being filled with water, the water pipe is prevented from being expanded and broken due to freezing, and the reliability is high.
It should be noted that the specific values of the first preset temperature, the second preset temperature and the third preset temperature may be the same or different, and may be determined according to actual situations, and generally, the first preset temperature, the second preset temperature and the third preset temperature are all set above 0 ℃ and higher than the freezing point of water.
Specifically, in this embodiment, the first preset temperature, the second preset temperature, and the third preset temperature are all 1 ℃, and of course, the specific temperatures of the first preset temperature, the second preset temperature, and the third preset temperature may be determined according to actual situations.
Further, the protection method further comprises the following steps:
when the temperature of the water in the main pipeline detected by the temperature sensor 440 is less than a fourth preset temperature, the heater is controlled to operate, wherein the fourth preset temperature is higher than the freezing point of the water.
Specifically, when the processor acquires that the temperature of the water in the main pipeline detected by the temperature sensor 440 is less than a fourth preset temperature, the heater is controlled to operate. The heater is used for heating the water in the main pipeline, and the water is prevented from freezing and breaking the water pipe.
Under the condition that heating element does not start, and under the circumstances of not cutting off power supply, when the temperature of the main line that temperature sensor 440 detected was less than the fourth and predetermine the temperature, treater control heater work heated the water in the main line, avoided the water in the main line to be broken because of freezing and being expanded.
Further, when it is acquired that the temperature of the water in the main pipeline detected by the temperature sensor 440 is lower than a fourth preset temperature, the step of controlling the operation of the heater includes:
when the temperature of the water in the main pipeline detected by the temperature sensor 440 is lower than a fourth preset temperature, the heater is controlled to operate until the temperature of the water in the main pipeline detected by the temperature sensor 440 is higher than a fifth preset temperature, wherein the fifth preset temperature is higher than the fourth preset temperature.
The fourth preset temperature may be 3 ℃, the fifth preset temperature may be 20 ℃, and of course, the values of the fourth preset temperature and the fifth preset temperature are not limited to the above, and the values of the fourth preset temperature and the fifth preset temperature may be set according to actual situations.
Example two
As shown in fig. 2, the second embodiment is different from the first embodiment in that the second embodiment may not include a heater, and in the second embodiment, the protection structure further includes a water pump 700, the water inlet pipeline 110, the heat exchanger 120, the water outlet pipeline 130, the hot water conveying pipeline 710, and the cold water conveying pipeline 720 are sequentially communicated and matched to form a circulation pipeline, and the water pump 700 is disposed on the circulation pipeline.
Further, the protection structure further includes a check valve 730, and the check valve 730 is disposed between the hot water delivery pipe 710 and the cold water delivery pipe 720.
Specifically, an inlet of the check valve 730 is close to the hot water delivery pipe 710, an outlet of the check valve 730 is close to the cold water delivery pipe 720, and the water pump 700 is used for driving water in the circulation pipeline to flow through the water inlet pipeline 110, the heat exchanger 120, the water outlet pipeline 130, the hot water delivery pipe 710 and the cold water delivery pipe 720 in sequence.
More specifically, the cold water delivery pipe 720 is connected to a tap water supply pipe, the cold water delivery pipe 720 includes a first cold water delivery branch 721 connected to the faucet 750 and a second cold water delivery branch 722 connected to the shower 770, the hot water delivery pipe 710 is connected to the water outlet end 131 of the water outlet pipe 130, the hot water delivery pipe 710 includes a first hot water delivery branch 711 connected to the faucet 750 and a second hot water delivery branch 712 connected to the shower 770, and the water inlet end of the water inlet pipe 110 is connected to the tap water supply pipe. The water inlet pipeline 110, the heat exchanger 120, the water outlet pipeline 130, the hot water conveying pipeline 710 and the cold water conveying pipeline 720 are sequentially communicated and matched to form a circulating pipeline, and the water pump 700 is arranged on the water inlet pipeline 110, the water outlet pipeline 130, the hot water conveying pipeline 710 or the cold water conveying pipeline 720.
In the following description, only the first hot water supply branch 711 on the side of the faucet 750 is connected to the first cold water supply branch 721, and the check valve 730 is disposed between the first hot water supply branch 711 and the first cold water supply branch 721. Of course, the second hot water feeding branch 712 and the second cold water feeding branch 722 on one side of the shower 770 may also communicate to form a circulation pipeline.
When the water pump is started, water flows through the water inlet pipeline 110, the heat exchanger 120, the water outlet pipeline 130, the first hot water conveying pipeline 711 and the first cold water conveying pipeline 721 in sequence, and circularly flows, so that freeze prevention is realized.
The application also relates to a protection method which can be applied to the protection structure in the second embodiment, and the protection method comprises the following steps:
when the first temperature control valve 310 detects that the water temperature is lower than the first preset temperature, the first temperature control valve 310 is closed;
when the second temperature control valve 320 detects that the water temperature is lower than a second preset temperature, the second temperature control valve 320 is opened;
when the third temperature control valve 330 detects that the water temperature is lower than a third preset temperature, the third temperature control valve 330 is opened;
in case of a power cut, the shielding structure may enter a mechanically shielded state. When the temperature sensing device in the first temperature control valve 310 detects that the water temperature is lower than a first preset temperature, the first temperature control valve 310 is closed, and the water inflow of tap water is cut off; when the temperature sensing device in the second temperature control valve 320 detects that the water temperature is lower than a second preset temperature, the second temperature control valve 320 is opened, so that part of water in the water inlet pipeline 110 and the heat exchanger 120 flows into the drainage branch and is discharged through the drainage end 221 of the drainage branch; when the temperature sensing device in the third temperature control valve 330 detects that the water temperature is lower than the third preset temperature, the third temperature control valve 330 is opened, so that a part of water in the water outlet pipeline 130 and the heat exchanger 120 flows into the drainage branch and is then discharged through the drainage section of the drainage branch. In the protection structure, even when power is off, the first temperature control valve 310, the second temperature control valve 320 and the third temperature control valve 330 can be opened and closed according to water temperature, so that at least part of water in the whole main pipeline can flow out through the drainage branch, the whole main pipeline is prevented from being filled with water, the water pipe is prevented from being expanded and broken due to freezing, and the reliability is high.
It should be noted that the specific values of the first preset temperature, the second preset temperature and the third preset temperature may be the same or different, and may be determined according to actual situations, and generally, the first preset temperature, the second preset temperature and the third preset temperature are all set above 0 ℃ and higher than the freezing point of water.
Specifically, in this embodiment, the first preset temperature, the second preset temperature, and the third preset temperature are all 1 ℃, and of course, the specific temperatures of the first preset temperature, the second preset temperature, and the third preset temperature may be determined according to actual situations.
Further, the protection method further comprises the following steps:
when the temperature of the water in the main pipeline detected by the temperature sensor 440 is lower than a sixth preset temperature, the operation of the water pump 700 is controlled, wherein the sixth preset temperature is higher than the freezing point of the water.
Specifically, when the processor obtains that the temperature of the water in the main pipeline detected by the temperature sensor 440 is lower than a sixth preset temperature, the water pump 700 is controlled to start, so that the water in the water inlet pipeline 110, the heat exchanger 120, the water outlet pipeline 130, the first hot water conveying pipeline 710 and the first cold water conveying pipeline 720 circulates, and freezing prevention is achieved.
Further, the protection method further comprises the following steps:
when the temperature of the water in the main pipeline detected by the temperature sensor 440 is lower than a seventh preset temperature, the operation of the water pump 700 and the operation of the heating assembly are controlled until the temperature of the water in the main pipeline detected by the temperature sensor 440 is higher than an eighth preset temperature, wherein the seventh preset temperature is higher than a freezing point of the water, and the eighth preset temperature is higher than the seventh preset temperature.
Under the condition of no power failure, when the temperature of the water in the main pipeline detected by the temperature sensor 440 is lower than a seventh preset temperature, the processor controls the operation of the water pump 700 and the operation of the heating assembly, when the heating assembly operates, the fan 600 is started, then the ignition needle 550 is ignited, the gas proportional valve 510 heats the water in the circulating pipeline after passing through the heat exchanger 120, and when the temperature of the water in the main pipeline detected by the temperature sensor 440 is higher than an eighth preset temperature, the water pump 700 and the heating assembly stop operating, so that the anti-freezing effect can be realized.
Wherein, the sixth preset temperature may be 8 ℃, the seventh preset temperature may be 3 ℃, and the eighth preset temperature may be 30 ℃.
As shown in fig. 1, in one embodiment, the invention relates to a water heater, which includes a protection structure as described above, and/or applies the protection method according to the first embodiment.
In another embodiment, as shown in fig. 2, a water heater is provided, which includes the protection structure as described above and/or applies the protection method according to the second embodiment.
In the above water heater, the protection structure may enter a mechanical protection state when the power supply is cut off. When the temperature sensing device in the first temperature control valve 310 detects that the water temperature is lower than a first preset temperature, the first temperature control valve 310 is closed, and the water inflow of tap water is cut off; when the temperature sensing device in the second temperature control valve 320 detects that the water temperature is lower than a second preset temperature, the second temperature control valve 320 is opened, so that part of water in the water inlet pipeline 110 and the heat exchanger 120 flows into the drainage branch and is discharged through the drainage end 221 of the drainage branch; when the temperature sensing device in the third temperature control valve 330 detects that the water temperature is lower than the third preset temperature, the third temperature control valve 330 is opened, so that a part of water in the water outlet pipeline 130 and the heat exchanger 120 flows into the drainage branch and is then discharged through the drainage section of the drainage branch. In the protection structure, even when power is off, the first temperature control valve 310, the second temperature control valve 320 and the third temperature control valve 330 can be opened and closed according to water temperature, so that at least part of water in the whole main pipeline can flow out through the drainage branch, the whole main pipeline is prevented from being filled with water, the water pipe is prevented from being expanded and broken due to freezing, and the reliability is high.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (13)
1. A protective structure, comprising:
the main pipeline comprises a water inlet pipeline, a heat exchanger and a water outlet pipeline which are sequentially communicated, wherein one end of the water inlet pipeline, which is far away from the heat exchanger, is a first water inlet end;
the drainage branch comprises a second water inlet end, a third water inlet end and a drainage end, the second water inlet end is communicated with the water inlet pipeline, and the third water inlet end is communicated with the water outlet pipeline;
the first temperature control valve is arranged on the water inlet pipeline, the first temperature control valve is closer to the first water inlet end than the second water inlet end, the second temperature control valve is arranged on the drainage branch and is positioned between the second water inlet end and the drainage end, and the third temperature control valve is arranged on the drainage branch and is positioned between the third water inlet end and the drainage end;
wherein at least part of the water in the main conduit is able to flow into the drain leg under the influence of gravity.
2. The protective structure according to claim 1, characterized in that said drainage branch comprises a first drainage line and a second drainage line communicating with said first drainage line, said first drainage line comprising said second water inlet end and said third water inlet end, the end of said second drainage line remote from said first drainage line being a drainage end.
3. The protective structure according to claim 2, characterized in that said second temperature-controlled valve is provided in said first drain line and said third temperature-controlled valve is provided in said second drain line.
4. The protective structure according to claim 1, characterized in that said water inlet line comprises a first water pipe, said first water pipe being closer to said heat exchanger than said second water inlet end, said first water pipe being located above said water discharge branch.
5. The protective structure according to claim 1, characterized in that the heat exchanger is located above the drainage branch.
6. The protective structure according to claim 1, characterized in that said water outlet conduit comprises a second water pipe, said second water pipe being closer to said heat exchanger than to said third water inlet end, said second water pipe being located above said water discharge branch.
7. Protective structure according to claim 1, wherein a heater is arranged on the water inlet line, the heat exchanger and/or the water outlet line.
8. The protective structure according to claim 1, further comprising a water pump, wherein the water inlet pipeline, the heat exchanger, the water outlet pipeline, the hot water conveying pipeline and the cold water conveying pipeline are sequentially communicated and matched to form a circulating pipeline, and the water pump is arranged on the circulating pipeline.
9. The protective structure according to claim 8, further comprising a one-way valve disposed between said hot water delivery line and said cold water delivery line.
10. The protective structure according to claim 9, characterized in that the inlet of the one-way valve is close to the hot water delivery line and the outlet of the one-way valve is close to the cold water delivery line, and the water pump is configured to drive the water in the circulation line to flow through the water inlet line, the heat exchanger, the water outlet line, the hot water delivery line, and the cold water delivery line in sequence.
11. Protective structure according to any one of claims 1-10, wherein a temperature sensor is arranged on the main line.
12. The protective structure according to claim 11, wherein the temperature sensor is arranged in the water outlet pipeline.
13. A water heater comprising a protective structure as claimed in any one of claims 1 to 12.
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| CN202020738511.4U CN212205037U (en) | 2020-05-07 | 2020-05-07 | Protective structure and water heater |
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| CN202020738511.4U CN212205037U (en) | 2020-05-07 | 2020-05-07 | Protective structure and water heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426054A (en) * | 2020-05-07 | 2020-07-17 | 珠海格力电器股份有限公司 | Protection structure, protection method and water heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426054A (en) * | 2020-05-07 | 2020-07-17 | 珠海格力电器股份有限公司 | Protection structure, protection method and water heater |
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