CN216048314U - Instant electric water heater - Google Patents

Abstract

The utility model discloses an instant electric water heater, which comprises a heating body and a control assembly, wherein the control assembly controls the heating body to start or stop heating; be equipped with the first temperature sensor who is connected with control assembly in the heating member, when first temperature sensor detected that the temperature in the heating member is less than preset temperature threshold value, this first temperature sensor sent preheating signal to control assembly and orders about the heating member and preheats. When opening the outlet valve and draining, control assembly control heating member preheats with low-power, makes the temperature in the heating body maintain about the settlement temperature, when opening the outlet valve and draining, after putting the cold water that the pipeline stored between outlet valve and the heating member, the temperature of the rivers of emitting all is above the settlement temperature, can provide the suitable hot water of temperature for the user fast, has also avoided needing a large amount of time to wait for to put too much cold water simultaneously, causes the water waste.

Description

Instant electric water heater

Technical Field

The utility model relates to an electric water heater, in particular to an instant electric water heater.

Background

Because the hands are cooled by water in the kitchen in cold weather, the existing kitchen is usually provided with a water heater or a hot water faucet, and the kitchen is generally provided with an electric water heater for safety and environmental protection.

Because the space for installing the water heater in the kitchen is limited, a householder generally tends to install a small-sized electric water heater (commonly called 'small kitchen appliance'), the existing electric water heater is generally divided into a water storage electric water heater and an instant heating electric water heater, because the water storage electric water heater is generally provided with a large water tank, the volume is large, the water in the water tank needs to be heated before use, because the water in the heating water tank needs to wait, and the water tank is repeatedly boiled to easily generate water scale, the water storage electric water heater is inconvenient to use and occupies space.

In the prior art, the volume of the instant electric water heater is generally small, the instant electric water heater does not occupy too much space in a kitchen, in order to enable the instant electric water heater to heat quickly, the power of the instant electric water heater is generally large, the requirement on electric wires used in the kitchen is high, and a user generally needs to rearrange the electric wires in the kitchen before installing the instant electric water heater or separately pull the electric wires for the instant electric water heater. If the installation of the low-power instant electric water heater is selected to avoid the rearrangement of the electric wires or the separate traction of the electric wires, the heating body of the instant electric water heater is a main energy consumption element, the heating body has low power, the heating body is slowly heated, water needs to be discharged all the time to heat water flow because a heating switch of the instant electric water heater is communicated with a water outlet valve, a large amount of cold water with lower temperature needs to be discharged before the heating water temperature is proper, a large amount of time needs to be waited, and water waste is caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical defects, the utility model provides an instant electric water heater.

In order to solve the problems, the utility model is realized according to the following technical scheme:

the utility model provides an instant electric water heater, comprising:

a heating body;

the control component controls the heating body to start or stop heating;

wherein, be equipped with the first temperature sensor who is connected with control assembly in the heating member, when first temperature sensor detects that the temperature of water in the heating member is less than predetermineeing the temperature threshold value, this first temperature sensor sends preheating signal to control assembly and orders about the heating member and preheats.

Preferably, the control component comprises a silicon controlled rectifier, the silicon controlled rectifier is connected with the heating body in series, the silicon controlled rectifier is used for controlling the heating body to start or stop, and the silicon controlled rectifier is also used for adjusting the voltage at two ends of the heating body so as to change the power of the heating body.

Preferably, the control assembly further comprises a control panel, the control panel is connected with the controllable silicon, and the control panel is used for receiving a preheating signal to drive the heating body to preheat.

Preferably, the first temperature sensor extends into the heating body and detects a temperature of water in the heating body.

Preferably, the first temperature sensor is provided at the center of the heating body.

Preferably, the heating body is connected in series with a temperature controller, the temperature controller is arranged on the body surface of the heating body and detects the temperature of the heating body, and when the temperature of the heating body is higher than a temperature threshold value, the temperature controller cuts off the connection between the heating body and a power supply to protect the heating body.

Preferably, the two ends of the heating body are respectively communicated with a water inlet pipe and a water outlet pipe, a second temperature sensor used for detecting the water inlet temperature is arranged in the water inlet pipe, and the water outlet pipe is used for communicating with a water outlet valve for discharging water.

Preferably, a flow sensor for detecting real-time flow is arranged in the water inlet pipe.

Preferably, the leakage current detection device further comprises a power line, an alarm and a leakage current magnetic ring for detecting leakage current, when the leakage current is larger than a leakage current threshold value, the leakage current magnetic ring sends a heating stopping signal to the control assembly to drive the heating body to stop heating, and drives the alarm to give an alarm sound.

Preferably, the method further comprises the following steps:

a face shell;

the face shell covers the bottom shell and encloses an accommodating space together with the bottom shell, and the heating body and the temperature controller are arranged in the accommodating space.

Compared with the prior art, the utility model has the beneficial effects that:

1. in the embodiment of the utility model, the first temperature sensor is arranged in the heating body and used for detecting the water temperature in the heating body, the detected water temperature of the first temperature sensor is compared with the set temperature, when the detected water temperature of the first temperature sensor is lower than the set temperature, the control panel controls the temperature controller to preheat the heating body at low power, so that the water temperature in the heating body is maintained at about the set temperature, when the water outlet valve is opened to drain water, after cold water stored in a pipeline between the water outlet valve and the heating body is drained, the water temperature of the drained water flow is above the set temperature, hot water with proper temperature can be quickly read for a user, and simultaneously, the waste of water caused by the fact that a large amount of time is needed to wait for draining too much cold water is avoided.

2. In the embodiment of the utility model, the heating body is always in the low-power working state for preheating before the heating body opens the valve to discharge water, the temperature of the heating body is closer to the temperature of the normal-power working state, and after the valve is opened, the temperature of the heating body can be quickly raised to the temperature required by a user when the heating body is in the normal-power state, so that the user is prevented from spending a large amount of time to wait.

3. In an embodiment of the utility model, before the preheating command is sent to the controllable silicon to preheat the heating body, the inner container of the heating body needs to be ensured to be filled with water, so that after the electric water heater is started, a heating waiting time needs to be set, and the heating body needs to be filled with water within the heating waiting time, so that the phenomenon that the heating body is dried because the heating body quickly evaporates the heated water within a short time due to too little water stored in the heating body is avoided.

Drawings

Embodiments of the utility model are described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is an internal structural view of an instant electric water heater of the present invention;

fig. 2 is an exploded view of the instant electric water heater of the present invention.

In the figure: 1. a bottom case; 2. mica sheets; 3. a transformer; 4. a terminal block; 5. wire clamps; 6. a support; 7. a heating body; 8. a temperature controller; 9. a third temperature sensor; 10. a first temperature sensor; 11. a face shell; 12. pasting the surface; 13. a control panel; 14. silicon controlled rectifier; 15. a second temperature sensor; 16. a flow sensor; 17. a water inlet pipe; 18. a water inlet identification ring; 19. a water outlet pipe; 20. a water outlet identification ring; 21. a pressure relief valve; 22. hanging a piece; 23. electric leakage magnetic ring.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

In the related art, in order to rapidly heat an instant electric water heater, the temperature of the heating body 7 is generally increased by increasing the power of the instant electric water heater, and then the temperature of water flowing through the heating body 7 is rapidly increased to reduce the water yield of cold water, but the high-power electric water heater has high requirements on electric wires laid in a kitchen, the maximum power of most instant electric water heaters is generally about 6000W-10000W, the working current is about 40A or even higher, so that the power line of the instant electric water heater preferably has a cross-sectional area of 6mm for normal operation and electricity safety of the instant electric water heater²And the international single-core copper wire, the wire laid in the kitchen generally does not meet the requirement in the kitchen decoration process, so the wire in the kitchen needs to be rearranged before the instant electric water heater is installed, or the wire needs to be separately pulled for the instant electric water heater.

If a low-power instant electric water heater is selected to be installed in order to avoid the rearrangement or redrawing of electric wires, because the heating body 7 of the instant electric water heater is a main energy consumption element, the heating body 7 has low efficiency of heating water in a small power hour, the temperature rise is slow, and the temperature controller 8 of the instant electric water heater is water-controlled, only when the flow sensor 16 positioned at the water inlet pipe 17 detects that the water flow flowing through reaches the minimum water flow, the temperature controller 8 controls the heating body 7 to heat, and in the heating process, the valve of the water outlet needs to be opened all the time to maintain the water flow above the minimum water flow, and the heating body 7 can be heated all the time. However, in the heating process of the heating body 7, since the power of the instant electric water heater is small, the power of the heating body 7 is also small, and a long time is needed to heat the water flow, the heating body 7 needs to be waited for heating the water flow slowly until the temperature reaches a proper temperature, and cold water with a low temperature needs to be discharged in the waiting process, so that water consumption is wasted.

As shown in fig. 1 and 2, the instant electric water heater of the present invention includes a heating body 7, a water inlet pipe 17, a water outlet pipe 19, a control board 13 and a thyristor 14.

Specifically, the heating body 7 is a cylindrical cup-shaped heating body 7, a heating rod is arranged in the heating body, the cup-shaped heating body 7 is made of stainless steel, the heating efficiency of the stainless steel heating body 7 is high, the heating speed is high, the side walls at the two ends of the heating body 7 are respectively communicated with a water inlet pipe 17 and a water outlet pipe 19, the right side of the heating body is the water inlet pipe 17, the left side of the heating body is the water outlet pipe 19, a first temperature sensor 10 is arranged on the right end face of the heating body 7, a second temperature sensor 15 is arranged in the water inlet pipe 17, a third temperature sensor 9 is arranged in the water outlet pipe 19, a control panel 13 is arranged between the water inlet pipe 17 and the water outlet pipe 19, and the control panel 13 is electrically connected with the controlled silicon 14, the first temperature sensor 10, the second temperature sensor 15 and the third temperature sensor 9 are respectively. The control panel 13 is welded with an LED display screen and a control button, the LED display screen can display the water temperature in the water pipe 19 and the preset temperature of the water in the heating body 7, and the preset temperature is adjusted through the control button.

Specifically, a thyristor 14 (also called a thyristor) is connected in series between the control board 13 and the heating body 7, the thyristor has small volume, high efficiency and good stability, can be used as a non-contact switch to connect or cut off the heating body 7 with a power supply, can realize the smooth voltage regulation of 0-220V, and controls the working power of the heating body 7 by adjusting the voltage at two ends of the heating body 7 so as to realize the constant temperature maintenance of the water flow in the heating body 7. In the process of opening the water valve to drain water, when the temperature of water in the heating body 7 reaches the temperature required by a user, the silicon controlled rectifier 14 can adjust the conduction angle of alternating current passing through the silicon controlled rectifier, so that the frequency is unchanged, and the pressure is balanced and regulated. When the alternating current passes through the thyristor 14, the alternating current can be controlled to start conducting at any angle of 0-180 degrees, that is, controllable rectification, when the positive half cycle is applied to the anode of the thyristor 14, and at a certain angle of 180 degrees, a trigger pulse is applied to the control electrode of the thyristor 14, for example, a pulse is applied at 30 degrees, and the thyristor 14 can only pass the remaining 150 degrees of current. This starting angle at which the thyristor 14 is conducting is referred to as the conduction angle.

Specifically, after the power supply is plugged in the instant electric water heater, the first temperature sensor 10 detects the water temperature in the heating body 7 and sends the detected water temperature to the control board 13, the control board 13 compares the detected water temperature with the water temperature at the preset temperature, and when the water temperature detected by the first temperature sensor 10 is greater than or equal to the preset water temperature, the control board 13 controls the thyristor 14 to be cut off, so that the heating body 7 is kept in an unheated state; when the temperature that first temperature sensor 10 detected is less than predetermineeing the temperature, control panel 13 sends preheating command for silicon controlled rectifier 14, make switching on of silicon controlled rectifier 14, make heating member 7 intercommunication power, heating member 7 begins preheating with low power state (during low power state, the power of water heater is generally 300W), until the temperature that first temperature sensor 10 detected is greater than or equal to when predetermineeing the temperature, control panel 13 sends the heat preservation command for silicon controlled rectifier 14, make silicon controlled rectifier 14 stop once more, heating member 7 stops the heating, when the temperature of water in heating member 7 is less than when predetermineeing the temperature because the heat dissipation once more, control panel 13 sends preheating command once more and makes heating member 7 preheat, the recirculation, make the temperature of water in heating member 7 maintain predetermineeing the temperature and fluctuate.

Specifically, when the outlet valve is opened, the flow sensor 16 disposed on the inlet tube 17 senses water flow and sends the water flow to the control board 13, the control board 13 sends a heating command to the silicon controlled rectifier 14, the silicon controlled rectifier 14 adjusts the conduction angle to change the voltage at two ends of the heating body 7, the heating body 7 starts to heat rapidly at normal power, and since the water temperature in the heating body 7 is always maintained above the preset water temperature, except that the water flow just beginning to flow out of the outlet valve is the cold water between the outlet tube 19 and the outlet valve, the water temperature of the water flow flowing out later is above the preset water temperature. And because the heating member 7 is with low-power operation when preheating, the temperature of heating member 7 also is closer with normal power during operation temperature, when heating member 7 with normal power operation, heating member 7 can heat up more fast to heat the rivers that flow through to the required temperature of user in a shorter time, reduced the defect that the water valve need be opened and a large amount of cold water need be dropped, also avoided electric water heater heating member 7 need heat up gradually when opening the valve and draining, need wait for the defect of longer time.

In a preferred embodiment, the heating body 7 is provided with a pressure relief valve 21, because the water flow direction of the electric water heater is unidirectional, the water can only flow in from the water inlet pipe 17 and flow out from the water outlet pipe 19, when the water outlet valve of the electric water heater is in a closed state and the heating body 7 is in a heating state, the water in the heating body 7 is heated to expand, in order to prevent cracks or explosion caused by overlarge pressure of the heating body 7, the excess water after expansion is discharged from the pressure relief valve 21, and the safety of people and the instant electric water heater is protected.

In a preferred embodiment, the detection probe of the first temperature sensor 10 is located at the very center of the heating body 7, so as to avoid that the detection temperature is too high due to too close proximity to the heating rod of the heating body 7, or that the detection temperature of the first temperature sensor 10 deviates too much due to uneven distribution of the water temperature in the heating body 7.

Specifically, the preset temperature is set by the temperature in the water inlet pipe 17 detected by the second temperature sensor 15, for example, in spring and summer, when the outdoor temperature is warmer, the preset temperature is 20% -25% higher than the water temperature detected by the second temperature sensor 15; in autumn and winter, when the outdoor temperature is cold, the preset temperature is 53-55% higher than the water temperature detected by the second temperature sensor 15.

Specifically, the instant electric water heater further comprises a bottom shell 1 and a face shell 11, wherein the bottom shell 1 and the face shell 11 are made of plastics, the bottom shell 1 and the face shell 11 are clamped to form an accommodating space, a plurality of bolt mounting holes are formed in the bottom shell 1, a heating body 7, a water inlet pipe 17 and a water outlet pipe 19 can be fixed through the plurality of bolt mounting holes in a matched mode through bolts or screws, a support 6 used for mounting a control board 13 is arranged below the control board 13, the support 6 is a tripod, three upright posts of the support 6 are provided with blind holes, three positioning columns are arranged on the bottom shell 1 and embedded into the blind holes to achieve positioning of the support 6, and the control board 13 is fixed on the support 6 through bolts or is fixedly connected with the control board through glue.

Specifically, a transformer 3 is arranged beside the bracket 6, the transformer 3 is connected with a first temperature sensor 10, a second temperature sensor 15, a third temperature sensor 9 and a flow sensor 16, 220V voltage is converted into standard voltage capable of driving the sensors through the transformer 3, and the temperature detected by the third temperature sensor 9 is the temperature displayed on an LED display screen on the control panel 13.

Specifically, install electric leakage magnetic ring 23 on the power cord, electric leakage magnetic ring 23 gathers the leakage current on the power cord, and when the leakage current was greater than the leakage current threshold value, it shows that the insulating layer of power cord outsourcing appears damaged or ageing, needs in time to maintain the change. When the leakage current is greater than the leakage current threshold value, the leakage magnetic ring 23 sends a second heating stopping command to the control board 13 to drive the heating body 7 to stop heating, and drive the alarm to give an alarm to remind a user that the water heater has a risk of leakage.

The leakage current is non-functional current, and the current flows through the outer insulating layer of the power supply line under the action of no fault and no applied voltage, and is a main index of product safety performance and used for measuring the quality of the product insulating performance.

Specifically, be equipped with mica sheet 2 between heating member 7 and drain pan 1, mica sheet 2 has good insulating properties, conducts to the drain pan 1 when can effectively preventing heating member 7 or other parts electric leakage on to mica sheet 2 has good heat-proof quality and high temperature resistance, can prevent that drain pan 1 from melting because of heating member 7 is overheated, has also guaranteed the thermal insulation performance who has strengthened heating member 7 simultaneously, effectively saves the electric energy.

The utility model discloses a cable, including the power cord, terminal platform 4, wire clamp 5, the wire clamp is fixed in wire clamp 5's through-hole, the wire clamp is fixed in the direct grafting of the cable of being connected with the power cord, the maintenance is convenient.

Specifically, the inlet pipe 17 and the outlet pipe 19 are respectively provided with a water inlet identification ring 18 and a water outlet identification ring 20, wherein the water inlet identification ring 18 is blue, and the water outlet identification ring 20 is red, so that the water way can be accessed conveniently in an auxiliary manner, and the water way is prevented from being reversely connected during installation.

In a preferred embodiment, an electricity-proof wall is communicated between the water outlet pipe 19 and the water discharge valve to prevent the water discharged by the water discharge valve from carrying current, thereby improving the electricity-proof performance of the instant electric water heater.

In a preferred embodiment, the surface paste 12 is arranged on the surface shell 11, the surface paste 12 corresponds to the installation position of the control panel 13, a through hole is formed in the surface shell 11 so as to observe a picture of an LED display screen on the control panel 13, a through hole is formed in the surface shell 11 so as to control the control button to extend out of the surface shell 11 so as to be convenient to operate, the surface paste 12 is made of transparent water-discharging plastic, water temperature information of the LED display screen can be clearly observed through the surface paste 12, and meanwhile, water vapor or water drops can be prevented from entering the surface shell 11 through the through hole, so that internal parts are short-circuited and burnt and rusted.

In a preferred embodiment, the hanging piece 22 is fixed on the back of the bottom shell 1 by bolts, and the hanging piece 22 is provided with cloud-shaped through holes, so that the instant electric water heater can be conveniently hung on a wall through nails, and the use space on the horizontal plane is saved.

Specifically, send the order of preheating to silicon controlled rectifier 14 and make heating member 7 begin to preheat before, need ensure that the inner bag of heating member 7 has been full of water, so after the instant electric water heater starts, need set up a heating latency, in heating latency, heating member 7 need be full of water, and the water storage volume is too little in avoiding heating member 7, causes heating member 7 to evaporate the water that heats in the short time rapidly, makes heating member 7 cause the dry combustion method phenomenon. And the heating waiting time is equal to the heating body capacity threshold value/the minimum starting flow, and the minimum starting flow is the minimum water inlet flow of the water inlet pipe. For example, the capacity of the inner container of the heating body 7 is 150ml, the minimum start flow rate is 1800ml/min, the heating waiting time is 150/1800 × 60 ═ 5s, and the heating waiting time is 5s, that is, after the thermoelectric water heater is started, the heating body 7 is filled with water within 5s of heating waiting time, so that the phenomenon that the heating body 7 is dried up due to the fact that the heating body 7 quickly evaporates the heated water within a short time because the stored water amount in the heating body 7 is too small is avoided.

In a preferred embodiment, the inner wall of heating member 7 is equipped with the level sensor who is used for measuring whether heating member 7 is in full water state, it locates heating member 7 inner wall upper end, this level sensor is connected with control panel 13 electricity, when thermoelectric water heater changes from the outage state to the on-state promptly, level sensor surveys heating member 7 and is in full water state, if heating member 7 is not in full water state, control panel 13 will keep silicon controlled rectifier 14 to the outage state, when avoiding not having water in heating member 7, the heating rod is in the dry combustion method state, only when heating member 7 is in full water state, heating member 7 can preheat by low-power.

Specifically, be equipped with temperature controller 8 between heating member 7 and control panel 13, be equipped with temperature controller 8 on heating member 7, temperature controller 8 is thermistor formula temperature controller 8, and the temperature probe of temperature controller 8 is used for detecting the heating member real-time temperature on locating heating member 7's the casing to do the contrast with heating member real-time temperature and heating member temperature threshold value. When the silicon controlled rectifier 14 is out of order, the phenomenon of heating always can appear in heating body 7, when the temperature of heating body 7 was too high, need force the conduction circuit who cuts off heating body 7 through temperature controller 8, made heating body 7 and power disconnection, only when pressing the button of connecting contact, heating body 7 could feed through the power heating, has avoided heating body 7 to heat always and has caused the damage to instantaneous electric water heater to cause the damage to the user.

The heating body 7, the control panel 13, the temperature controller 8 and the like of the present embodiment refer to the prior art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims (10)

1. An instant electric water heater, comprising:

a heating body;

the control component controls the heating body to start or stop heating;

wherein, be equipped with the first temperature sensor who is connected with control assembly in the heating member, when first temperature sensor detects that the temperature of water in the heating member is less than predetermineeing the temperature threshold value, this first temperature sensor sends preheating signal to control assembly and orders about the heating member and preheats.

2. The instant electric water heater according to claim 1, wherein the control assembly comprises a thyristor, the thyristor is connected in series with the heating body, the thyristor is used for controlling the heating body to start or stop, and the thyristor is also used for adjusting the voltage across the heating body to change the power of the heating body.

3. The instant electric water heater according to claim 2, wherein the control assembly further comprises a control board, the control board is connected to the thyristor, and the control board is used for receiving the preheating signal to drive the heating body to preheat.

4. An instant electric water heater according to claim 1, wherein the first temperature sensor extends into the heating body and detects the temperature of the water in the heating body.

5. An instant electric water heater according to claim 1, wherein the first temperature sensor is provided at the center of the heating body.

6. The instant electric water heater according to claim 1, wherein the heating body is connected in series with a temperature controller, the temperature controller is disposed on the surface of the heating body and detects the temperature of the heating body, and when the temperature of the heating body is higher than a temperature threshold, the temperature controller cuts off the connection between the heating body and the power supply to protect the heating body.

7. The instant electric water heater according to claim 1, wherein the heating body has two ends respectively connected to an inlet pipe and an outlet pipe, the inlet pipe is provided with a second temperature sensor for detecting the temperature of the inlet water, and the outlet pipe is connected to an outlet valve for discharging water.

8. The instant electric water heater according to claim 7, wherein a flow sensor is provided in the water inlet pipe for detecting a real-time flow.

9. The instant electric water heater as claimed in claim 1, further comprising a power cord, an alarm, and a leakage magnetic ring for detecting leakage current, wherein when the leakage current is greater than a threshold value of the leakage current, the leakage magnetic ring sends a heating stop signal to the control assembly to stop heating the heating body and to drive the alarm to sound.

10. An instant electric water heater according to any one of claims 1-9, further comprising:

a face shell;

the face shell covers the bottom shell and encloses an accommodating space together with the bottom shell, and the heating body and the temperature controller are arranged in the accommodating space.

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