CN111928493A - Water heater outlet water temperature control device and control method thereof - Google Patents

Abstract

The invention provides a water outlet temperature control device of a water heater and a control method thereof, which comprises a water heater shell, a temperature controller and a heat source selection device which are arranged outside the hot water shell, wherein the outer side of the water heater shell is provided with an insulating plate, the inside of the water heater shell is provided with a sealing cavity, the inside of the sealing cavity is provided with a proportional flow control mechanism, the proportional flow control mechanism comprises a core valve and left and right electromagnetic soft irons arranged at two sides of the core valve, wherein, left and right coils are evenly wound on the left and right electromagnetic soft irons, a water inlet and a water outlet are arranged on the water heater shell and the valve seat, the water inlet and the water outlet are connected by a hose, the device can freely set the temperature, through the automatic heat source of selecting of the temperature that sets up, after selecting the heat source, the play water temperature of delivery port passes through the size of the electric current of temperature controller control left and right coils and voltage to the removal of control core valve reaches the effect that the play water temperature is invariable.

Description

Water heater outlet water temperature control device and control method thereof

Technical Field

The invention belongs to the technical field of water heater control, and particularly relates to a water heater outlet water temperature control device and a control method thereof.

Background

With the continuous progress of the times, water heaters become one of indispensable devices in people's lives, after the water heaters have developed for many years, the water heaters in the market at present comprise solar water heaters, gas energy water heaters, electric water heaters, air energy water heaters and the like, a hot water opening and a cold water opening in the water heaters are connected through a water mixing valve, cold water and hot water are mixed at the water mixing valve and are discharged out through a water outlet for users to use, the outlet water temperature is realized by the users through rotating a handle of the water mixing valve, the outlet water temperature is not easy to adjust, the water temperature can have uneven cold and hot temperatures in the bathing process, the water temperature change can cause people to feel uncomfortable, the water temperature needs to be adjusted continuously, the operation process is complicated, and people feel unhappy.

Disclosure of Invention

The invention aims to provide an intelligent water heater temperature control device which can automatically control the water outlet temperature of a water heater, is short in temperature control time, high in precision, practical and reliable, and aims to solve the problems that the water outlet temperature of the water heater is difficult to adjust, the water outlet temperature is uneven in cold and hot, the water temperature adjusting operation is complicated and the like in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a water heater leaving water temperature control device, includes the water heater casing and sets up at the outside temperature controller of water heater casing and heat source selection device, the water heater casing outside is equipped with the insulation board, and the inside sealed chamber that is equipped with of water heater casing, its characterized in that: the inside of seal chamber is equipped with proportional flow control mechanism, proportional flow control mechanism includes installs the disk seat in water heater casing inside with fixed connection mode, be equipped with the inner chamber in the disk seat, this inner chamber is equipped with the case through clearance fit, the symmetry is equipped with left electromagnetism soft iron and right electromagnetism soft iron on the inside wall of disk seat, left electromagnetism soft iron and right electromagnetism soft iron are located the both sides of case, wherein evenly twine left coil and right coil on left electromagnetism soft iron and the right electromagnetism soft iron respectively, water heater casing and disk seat are equipped with water inlet and delivery port, and the water inlet passes through the hose connection with the delivery port.

The improvement of the technical scheme is that an inner cavity arranged in the valve seat is a cylindrical inner cavity, a valve core is arranged in the cylindrical inner cavity through clearance fit, an annular groove is formed in the middle of the valve core and forms an annular cavity with the surface of the inner cavity of the valve seat, and two ends of the valve core and the inner side wall of the valve seat form the cylindrical cavity. This is rational in infrastructure, and the case can not block the shell when moving about under the effect of stress for the device is more sensitive and accurate.

The technical scheme is further improved, a first water inlet hole and a second water inlet hole which are communicated with the annular cavity are formed in the upper end of the valve seat, a left wiring hole and a right wiring hole which are communicated with cavities on two sides of the valve core and used for allowing the left coil and the right coil to penetrate through are also formed in the upper end of the valve seat, a third opening which is communicated with the annular cavity is formed in the lower end of the valve seat, a water outlet hole which is communicated with the third opening is formed in the lower end of the water heater shell, a first opening, a sealing sleeve and a second opening are sequentially formed in the upper end of the water heater shell. Reasonable structure and convenient assembly.

The technical scheme is further improved, a first two-way connector and a second two-way connector are arranged at the first opening and the second opening which are arranged at the upper end of the water heater shell, external threads are respectively processed at the two ends of the first two-way connector and the second two-way connector, wherein a first water inlet, a second water inlet and a water outlet are boss holes and are respectively provided with external threads, the hose comprises a water inlet hose and a water outlet hose, the water inlet hose comprises a cold water hose and a hot water hose, the cold water hose comprises a primary cold water hose and a secondary cold water hose, one end of the primary cold water hose is connected with a cold water inlet, the other end of the primary cold water hose is connected with one end of the first two-way connector through threads, the other end of the first two-way connector is connected with the secondary cold water hose through threads, the other end of the secondary cold water hose is connected with the boss hole which is arranged at the upper end of the valve seat through threads, the hot, one end of the primary hot water hose is connected with the hot water port, the other end of the primary hot water hose is connected with one end of the two-way connector II through threads, the other end of the two-way connector II is connected with the secondary hot water hose through threads, the other end of the secondary hot water hose is connected with the boss hole II formed in the upper end of the valve seat through threads, the water outlet hose is connected with the water outlet through threads, the primary hot water hose is provided with the first temperature sensor, and the water outlet hose is provided with the second temperature sensor. The cold water hose, the hot water hose and the water outlet hose are connected in a threaded connection mode, the threaded connection has the advantages of being simple in structure, reliable in connection, convenient to detach and the like, forming integral stress in a spiral shape, not prone to damage, easy to find when problems occur, easy to solve and the like. The temperature sensor has the advantages of accurate measurement, high response speed and the like, and the temperature controller is convenient for controlling the temperature by the temperature sensor, so that the outlet water temperature of the water outlet pipe is more accurate.

The technical scheme is further improved, the heat source selection device comprises a heat source I, a heat source II and a two-position three-way electromagnetic directional valve, wherein a cold water port I and a hot water port I are led on the heat source I, a cold water port II and a hot water port II are led on the heat source II, the cold water port I and the cold water port II are connected with a cold water inlet, the hot water port I and the hot water port II are respectively connected with a valve inlet I and a valve inlet II on the two-position three-way electromagnetic directional valve, and a valve outlet on the two-position three-way electromagnetic valve is connected with a primary hot water hose on the water heater. The existence of the heat source selection device enables the water heater to adopt a plurality of heat sources, so that the device is more humanized.

The technical proposal is further improved, the outlet water temperature at the outlet water hose is controlled by a PID temperature controller, eight input ports I are arranged on the PID temperature controller₀~I₇Has eight output ports, each is O₀~O₇. The PID temperature controller has the advantages of high control precision, small temperature difference, small temperature fluctuation and the like, and the input port and the output port are both left with spare space and can be used for function expansion.

According to the technical scheme, the cold water hose, the hot water hose and the water outlet hose are all steel wire hoses. The steel wire hose has the advantages of good wear-resisting function, good aging-resisting function, long service life and the like.

According to the technical scheme, the water heater is further improved, and mounting holes for mounting the water heater shell and the insulating plate are formed in the water heater shell and the insulating plate. Reasonable in design is equipped with the mounting hole on the water heater, and the accessible mounting hole takes screw thread or bolted connection's mode to install on the wall body, and simple structure saves space.

The control method of the temperature control device of the intelligent water heater comprises the following steps:

1) temperature setting and displaying: inputting the set temperature T by a two-digit digital tube through a touch screen according to the requirement₀Setting the temperature T₀Input port I of PID temperature controller₀Input into a PID temperature controller through an output port O₀Outputting and displaying outwards;

2) and displaying the temperature of the heat source I: temperature T of heat source I₁The analog quantity is measured by the temperature sensor I, converted into digital quantity by the A/D converter and input port I of PID temperature controller₁Input into a PID temperature controller through an output port O₁Outputting and displaying the data outwards through a two-digit nixie tube;

3) automatic selection of heat source: when the temperature is not set, namely the two-position three-way electromagnetic directional valve is in a non-working state, the electromagnet YA in the two-position three-way electromagnetic directional valve is in a power-off state, at the moment, the first valve inlet is communicated with the valve outlet, the second valve inlet is blocked, and the first heat source is selected by default; heat source with temperature T₁When setting the temperature T₀≤T₁Time, temperature difference delta₁=T₁-T₀Not less than 0, at this time, the output port O of the PID temperature controller₂When the valve is arranged at 0, the electromagnet YA in the two-position three-way electromagnetic reversing valve controls the switch to be switched off, the electromagnet YA is powered off, at the moment, the first valve inlet of the two-position three-way electromagnetic reversing valve is communicated with the valve outlet, the second valve inlet is blocked, and the first heat source is automatically selected; when setting the temperature T₀＞T₁Time, temperature difference delta₁=T₁-T₀When the temperature of the heat source is less than 0, the output port O2 of the PID temperature controller is arranged at 1, the electromagnet control switch in the two-position three-way electromagnetic directional valve is closed, the electromagnet YA is electrified, the valve body of the two-position three-way electromagnetic directional valve is attracted by the electromagnet YA, the valve inlet II is communicated with the valve outlet at the moment, the valve inlet I is blocked, the heat source II is automatically selected, and meanwhile, the output port O of the PID temperature controller is arranged at 1₃The heating switch of the heat source II is closed, and the heat source II starts to heat;

4) and constant temperature control of the water outlet: temperature T of outlet water₂The analog quantity is measured by the temperature sensor II and converted by the A/D converterThe digital quantity is obtained through an inlet and an outlet I of a PID temperature controller₂Inputting into a PID temperature controller according to the set temperature T₀And the temperature T of the outlet water₂To control the temperature of the water to be constant, wherein the current and the voltage of the left coil are i₁、V₁The current and voltage of the right coil are i₂、V₂；

5) Safety alarm and reset, when the water pressure of cold water is too low, the temperature of outlet water is too high, namely T₂When the temperature is higher than 45 ℃, an output port O of the PID temperature controller ₆1, the alarm switch is closed, the alarm is sounded, when the cold water pressure is recovered to normal, the cold water pressure is reset manually, and the input port I of the PID temperature controller₃Setting 1, operating by PID temperature controller to make PID temperature controller output port O₆And setting 0, disconnecting the alarm switch and closing the alarm.

The specific method for controlling the constant temperature of the water outlet comprises the following steps:

1) when T is₀＞T₂Time, temperature difference delta₂=T₂-T₀When the pressure is higher than 0, the output port O of the PID temperature controller₄I.e. the current i of the left coil₁And voltage V₁Enlarged, outlet O₅I.e. the current i of the right coil₂And voltage V₂The valve core moves rightwards at the moment, so that the opening degree of the first water inlet is increased, the opening degree of the second water inlet is reduced, and the water outlet temperature T is increased₂Increasing until the temperature difference delta₂=0 i₁=i₂And V₁=V₂At the moment, the valve core is kept still, the opening degrees of the first water inlet and the second water inlet are kept unchanged, and the effect of keeping the temperature of the outlet water constant is achieved;

2) when T is₀=T₂Time, temperature difference delta₂=T₂-T₀Not less than 0, so that i₁=i₂、V₁=V₂At the moment, the valve core is kept unknown, and the opening degrees of the first water inlet and the second water inlet are kept unchanged;

3) when T is₀＜T₂Time, temperature difference delta₂=T₂-T₀< 0, at this time, the output port O of the PID temperature controller₄I.e. the current i of the left coil₁And voltage V₁Reduced, outlet O₅I.e. the current i of the right coil₂And voltage V₂Increasing, wherein the valve core moves leftwards at the moment, so that the opening degree of the first water inlet is reduced, the opening degree of the second water inlet is increased, and the water outlet temperature T is increased₂Decrease until the temperature difference delta₂=0 i₁=i₂And V₁=V₂And at the moment, the valve core is kept still, the opening degrees of the first water inlet and the second water inlet are kept unchanged, and the effect of keeping the temperature of the outlet water constant is achieved.

The invention has the beneficial effects that: the water outlet temperature control device and the control method thereof adopt the PID temperature controller to control the movement of the valve core in the proportional flow control mechanism, thereby achieving the effect of controlling the outlet temperature to be constant, realizing various control requirements such as negative feedback control, alarm reset, digital display, temperature setting input, high precision, high sensitivity and the like, and having short temperature control time, high precision, reliable use, better application prospect and obvious economic benefit.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a sectional view taken along line B-B in fig. 2.

Fig. 4 is a schematic structural diagram of a heat source selecting device of the present invention.

FIG. 5 is a schematic diagram of the interface of the PID temperature controller of the present invention.

Number 1 in the figure, insulating plate; 2. a water heater housing; 3. a valve seat; 4. a valve core; 5. a left electromagnetic soft iron; 6. a right electromagnetic soft iron; 7. a left coil; 8. a right coil; 9. A first water inlet; 10. a water inlet II; 11. a water outlet; 12. a first two-way connector; 13. a second two-way joint; 14 primary cold water hoses; 15. a secondary cold water hose; 16 primary hot water hoses; 17. a secondary hot water hose; 18. a first temperature sensor; 19. a second temperature sensor; 20. a left wiring hole; 21. a right wiring hole; 22. a plastic sealing sleeve; 23. a water outlet hose; 24. a wall body; 25. a two-position three-way electromagnetic directional valve; 26. a first valve inlet; 27. a valve outlet; 28. a valve inlet II; 29. the electromagnet YA.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those 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 component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The invention is shown in figures 1 to 3:

the utility model provides a water heater leaving water temperature control device, includes water heater casing 2 and sets up temperature controller and heat source selection device in water heater casing 2 outside, wherein water heater casing 2 outside is equipped with insulation board 1, is equipped with the mounting hole with the wall body installation on water heater casing 2 and insulation board 1, and water heater casing 2 passes through expansion bolts with insulation board 1 and installs on the wall body, and it is simpler to compare in other mounting means installation, and stable in structure, occupation space is little. The inside sealed chamber that is equipped with of water heater casing 2 is equipped with proportion flow control mechanism in the inside of this sealed chamber, proportion flow control mechanism includes installs disk seat 3 at water heater casing 2 inside with threaded connection mode, be equipped with the cylinder type inner chamber in the disk seat 3, be equipped with case 4 through clearance fit in this cylinder type inner chamber, wherein the symmetry is equipped with left electromagnetism soft iron 5 and right electromagnetism soft iron 6 on the inside wall of disk seat 3, and left electromagnetism soft iron 5 and right electromagnetism soft iron 6 are located the both sides of case 4 respectively, evenly twines around left coil 7 and right coil 8 on left electromagnetism soft iron 5 and the right electromagnetism soft iron 6 respectively. An annular groove is formed in the middle of the valve core 4, a closed annular cavity is formed by the annular groove and the surface of the inner cavity of the valve seat 3, and cylindrical cavities are formed by the two ends of the valve core 4 and the inner side wall of the valve seat 3. The upper end face of the valve seat 3 is provided with a first water inlet 9 and a second water inlet 10 which are communicated with the annular cavity, wherein the first water inlet 9 and the second water inlet 10 are boss holes and are provided with external threads on bosses, the upper end of the valve seat 3 is also provided with a left wiring hole 20 and a right wiring hole 21 which are communicated with cavities on two sides of the valve core 4, the left wiring hole 20 and the right wiring hole 21 are arranged so that the left coil 7 and the right coil 8 can penetrate out, the lower end face of the valve seat 3 is provided with a third opening communicated with the annular cavity, the lower end face of the water heater shell 2 is provided with a water outlet 11 communicated with the third opening at a position corresponding to the third opening, the water outlet 11 is a boss hole and is provided with external threads on a boss, the upper end face of the water heater shell 2 is sequentially provided with a first opening, a plastic sealing sleeve 22 and a second opening, and the plastic sealing sleeve. A first two-way joint 12 and a second two-way joint 13 are correspondingly arranged at the first opening and the second opening which are arranged on the upper end surface of the water heater shell 2, wherein external threads are processed at both ends of the first two-way joint 12 and both ends of the second two-way joint 13. The first water inlet 9 and the first two-way connector 10 are both connected with cold water hoses, each cold water hose comprises a primary cold water hose 14 and a secondary cold water hose 15, one end of each primary cold water hose 14 is connected with a cold water inlet, the other end of each primary cold water hose 14 is connected with one end of the first two-way connector 12 through threads, the other end of the first two-way connector 12 is connected with the secondary cold water hose 15 through threads, and the other end of each secondary cold water hose 15 is connected with the first water inlet 9 arranged at the upper end of the valve seat 3 through threads; the water inlet II 10 and the two-way joint II 13 are both connected with hot water hoses, each hot water hose comprises a primary hot water hose 16 and a secondary hot water hose 17, one end of each primary hot water hose 16 is connected with a hot water port, the other end of each primary hot water hose 16 is connected with one end of the two-way joint II 13 through threads, the other end of the two-way joint II 13 is connected with the secondary hot water hose 17 through threads, and the other end of each secondary hot water hose 17 is connected with the water inlet II 10 arranged at the upper end of the valve seat 3 through threads; the water outlet 11 is connected with a water outlet hose 23 in a threaded connection mode. A first temperature sensor 18 for measuring the temperature of a hot water opening is arranged on the primary hot water hose 16, and a second temperature sensor 19 for measuring the temperature of water is arranged on the water outlet hose 23.

As shown in fig. 4, the device is further provided with a heat source selection device, the heat source selection device comprises a first heat source, a second heat source and a two-position three-way electromagnetic directional valve 25, the two-position three-way electromagnetic directional valve 25 is mounted on the wall through bolts, the two-position three-way electromagnetic directional valve 25 comprises a first valve inlet 26, a second valve inlet 28, a valve outlet 27 and an electromagnet YA 29 for controlling the valve inlet of the two-position three-way electromagnetic directional valve 25, wherein a first cold water port and a second hot water port are led from the first heat source, a second cold water port and a second hot water port are led from the second heat source, the first cold water port and the second cold water port are both connected with the cold water inlet, the first hot water port and the second hot water port are respectively connected with the first valve inlet 26 and the second valve inlet 28 on the two-position three-way electromagnetic directional valve 25, and the valve outlet. The heat source selection device can automatically select the first heat source or the second heat source according to the set temperature under the control of the PID temperature controller.

As shown in FIG. 5, the outlet water temperature at the outlet water hose is controlled by a PID temperature controller, which has eight input ports I₀~ I₇Has 8 output ports, each is O₀~O₇。

The control method of the invention comprises the following steps:

the water outlet temperature of the water heater is controlled by PID negative feedback.

Temperature setting and display: the temperature can be freely set according to the requirement, and the temperature T is set₀The touch screen is adopted to be respectively input and displayed by a two-digit nixie tube, the step length of the input temperature value of the two-digit nixie tube is +/-1 ℃, and the set temperature T is₀Input port I of PID temperature controller₀Input into a PID temperature controller through an output port O₀And outputting and displaying outwards.

The A/D converter can convert the analog signal into digital signal, and when the temperature of the first heat source is displayed, the temperature T of the first heat source₁The analog quantity is measured by the temperature sensor I18, converted into digital quantity by the A/D converter, input into the PID temperature controller by the PID temperature controller input port I1, output and displayed by the output port O1 through the two-digit nixie tube, and the temperature data is collected and processed by the PID temperature controllerThe frequency is 5 s.

Automatic selection of heat source: when the temperature is not set, namely the two-position three-way electromagnetic directional valve 25 is in a non-working state, the electromagnet YA 29 in the two-position three-way electromagnetic directional valve 25 is in a power-off state, at the moment, the first valve inlet 26 is communicated with the valve outlet 27, the second valve inlet 28 is blocked, the first heat source is selected by default, and the set temperature T is used for setting the temperature of the first heat source₀And heat source-temperature T₁Selecting a heat source, wherein the selection method comprises the following steps:

when setting the temperature T₀≤T₁Time, temperature difference delta₁=T₁-T₀Not less than 0, at this time, the output port O of the PID temperature controller₂When the valve is set to 0, the electromagnet YA 29 in the two-position three-way electromagnetic directional valve 25 controls the switch to be switched off, the electromagnet YA 29 is powered off, at the moment, the first valve inlet 26 of the two-position three-way electromagnetic directional valve 25 is communicated with the valve outlet 27, the second valve inlet 28 is blocked, and the first heat source is automatically selected;

when setting the temperature T₀＞T₁Time, temperature difference delta₁=T₁-T₀When the output O2 of the PID temperature controller is set to 1, the electromagnet YA 29 in the two-position three-way electromagnetic directional valve 25 controls the switch to be closed, the electromagnet YA 29 is electrified, the valve body of the two-position three-way electromagnetic directional valve 25 is attracted by the electromagnet YA 29, the second valve inlet 28 is communicated with the valve outlet 27, the first valve inlet 26 is blocked, the second heat source is automatically selected, and meanwhile, the output O of the PID temperature controller is set to 1₃And (4) placing the heating switch in the first heating source 1, closing the heating switch in the second heating source, and starting heating in the second heating source.

Temperature T of outlet water₂The analog quantity is measured by the second temperature sensor 19, converted into digital quantity by the A/D converter and then converted into digital quantity by the PID temperature controller inlet and outlet I₂Inputting into PID temperature controller, controlling the water outlet temperature to be constant according to the set temperature T0 and the water outlet temperature T2, wherein the current and voltage of the left coil 7 are i₁、V₁The current and voltage of the right coil 8 are i₂、V₂The specific control method comprises the following steps:

when T is₀＞T₂Time, temperature difference delta₂=T₂-T₀When the pressure is higher than 0, the output port O of the PID temperature controller₄I.e. the left coil 7Stream i₁And voltage V₁Enlarged, outlet O₅I.e. the current i of the right coil 8₂And voltage V₂And when the valve core 4 moves rightwards, the opening degree of the first water inlet 9 is increased, the opening degree of the second water inlet 10 is reduced, and the outlet water temperature T is increased₂Increasing until the temperature difference delta₂=0 i₁=i₂And V₁=V₂At the moment, the valve core 4 is kept still, the opening degrees of the first water inlet 9 and the second water inlet 10 are kept unchanged, and the effect of keeping the temperature of the outlet water constant is achieved;

when T is₀=T₂Time, temperature difference delta₂=T₂-T₀Not less than 0, so that i₁=i₂、V₁=V₂At the moment, the valve core is kept unknown, and the opening degrees of the first water inlet 9 and the second water inlet 10 are kept unchanged;

when T is₀＜T₂Time, temperature difference delta₂=T₂-T₀< 0, at this time, the output port O of the PID temperature controller₄I.e. the current i of the left coil 7₁And voltage V₁Reduced, outlet O₅I.e. the current i of the right coil 8₂And voltage V₂Increasing, wherein the valve core 4 moves leftwards at the moment, so that the opening degree of the first water inlet 9 is reduced, the opening degree of the second water inlet 10 is increased, and the outlet water temperature T is increased₂Decrease until the temperature difference delta₂=0 i₁=i₂And V₁=V₂At the moment, the valve core 4 is kept still, the opening degrees of the first water inlet 9 and the second water inlet 10 are kept unchanged, and the effect of keeping the temperature of the outlet water constant is achieved.

Safety alarm and reset, when the water pressure of cold water is too low, the temperature of outlet water is too high, namely T₂When the temperature is higher than 45 ℃, an output port O of the PID temperature controller ₆1, the alarm switch is closed, the alarm is sounded, when the cold water pressure is recovered to normal, the cold water pressure is reset manually, and the input port I of the PID temperature controller₃Setting 1, operating by PID temperature controller to make PID temperature controller output port O₆And setting 0, disconnecting the alarm switch and closing the alarm.

When in use, the set temperature T is manually input through the touch screen₀Setting the temperature T₀Displayed by two nixie tubesThe user can observe the set temperature and the temperature T of the first heat source₁Measured by a temperature sensor I, displayed by a two-position nixie tube, T₀、T₁Temperature difference Δ of₁Operating in a PID temperature controller, and controlling the output port O of the PID temperature controller by the operation result₂、O₃The output (set to 0 or set to 1) further controls the on/off state of the electromagnet YA 29 and the on/off state of the heating switch of the heat source II, thereby automatically selecting the heat source and the outlet water temperature T₂Measured by the second temperature sensor, T₀、T₂Temperature difference Δ of₂Operating in a PID temperature controller, and controlling the output port O of the PID temperature controller by the operation result₄、O₅And thus the left coil 7 current i₁Or voltage V₁And the right coil 8 current i₂Or voltage V₂So as to control the outlet water temperature to be constant by controlling the movement of the valve core 4.

It should be noted that: expand input and output, redundant input port I in PID temperature controller₄—I₇And an outlet O₇The function expansion is used. The cold water hose, the hot water hose and the water outlet hose in the device are all steel wire hoses.

The water outlet temperature control device of the water heater of the invention is described in detail with reference to the accompanying drawings and the detailed description. However, the invention is not limited to the above description, and in any case, it will be within the knowledge of a person skilled in the art that various modifications can be made without departing from the inventive concept and still fall within the scope of protection of the invention.

Claims (10)

1. The utility model provides a water heater leaving water temperature control device, includes the water heater casing and sets up at the outside temperature controller of water heater casing and heat source selection device, the water heater casing outside is equipped with the insulation board, and the inside sealed chamber that is equipped with of water heater casing, its characterized in that: the inside of seal chamber is equipped with proportional flow control mechanism, proportional flow control mechanism includes installs the disk seat in water heater casing inside with fixed connection mode, be equipped with the inner chamber in the disk seat, this inner chamber is equipped with the case through clearance fit, the symmetry is equipped with left electromagnetism soft iron and right electromagnetism soft iron on the inside wall of disk seat, left electromagnetism soft iron and right electromagnetism soft iron are located the both sides of case, wherein evenly twine left coil and right coil on left electromagnetism soft iron and the right electromagnetism soft iron respectively, water heater casing and disk seat are equipped with water inlet and delivery port, and the water inlet passes through the hose connection with the delivery port.

2. The water heater outlet water temperature control device according to claim 1, characterized in that: the valve seat is characterized in that an inner cavity formed in the valve seat is a cylindrical inner cavity, a valve core is arranged in the cylindrical inner cavity in a clearance fit mode, an annular groove is formed in the middle of the valve core and forms an annular cavity with the surface of the inner cavity of the valve seat, and two ends of the valve core and the inner side wall of the valve seat form the cylindrical cavity.

3. The water heater outlet water temperature control device according to claim 2, characterized in that: the upper end of the valve seat is provided with a first water inlet hole and a second water inlet hole which are communicated with the annular cavity, the upper end of the valve seat is also provided with a left wiring hole and a right wiring hole which are communicated with the cavities on the two sides of the valve core and used for the left coil and the right coil to pass through, the lower end of the valve seat is provided with a third opening communicated with the annular cavity, the lower end of the water heater shell is provided with a water outlet hole communicated with the third opening, the upper end of the water heater shell is sequentially provided with a first opening, a sealing sleeve and a second opening, the first opening and the first water inlet hole are positioned at the same side, the second opening and the second water inlet hole are.

4. The intelligent water heater control device of claim 3, wherein: the water heater comprises a water heater shell, a water inlet I, a water outlet II, a first opening I and a second opening II which are arranged at the upper end of the water heater shell, external threads are machined at the two ends of the first opening and the two openings II, wherein the first water inlet and the second water inlet are provided with boss holes and are provided with external threads, the hose comprises a water inlet hose and a water outlet hose, the water inlet hose comprises a cold water hose and a hot water hose, the cold water hose comprises a primary cold water hose and a secondary cold water hose, one end of the primary cold water hose is connected with a cold water inlet, the other end of the primary cold water hose is connected with one end of the first two openings through threads, the other end of the first two openings is connected with the secondary cold water hose through threads, the other end of the secondary cold water hose is connected with the boss hole I arranged at the upper end of a valve seat through threads, the hot water, one end of the primary hot water hose is connected with the hot water port, the other end of the primary hot water hose is connected with one end of the two-way connector II through threads, the other end of the two-way connector II is connected with the secondary hot water hose through threads, the other end of the secondary hot water hose is connected with the boss hole II formed in the upper end of the valve seat through threads, the water outlet hose is connected with the water outlet through threads, the primary hot water hose is provided with the first temperature sensor, and the water outlet hose is provided with the second temperature sensor.

5. The water heater outlet water temperature control device according to claims 1 to 4, characterized in that: the heat source selection device comprises a heat source I, a heat source II and a two-position three-way electromagnetic directional valve, wherein a cold water opening I and a hot water opening I are led on the heat source I, a cold water opening II and a hot water opening II are led on the heat source II, the cold water opening I and the cold water opening II are connected with a cold water inlet, the hot water opening I and the hot water opening II are respectively connected with a valve inlet I and a valve inlet II on the two-position three-way electromagnetic directional valve, and a valve outlet on the two-position three-way electromagnetic valve is connected with a primary hot water hose on the water heater.

6. The water heater outlet water temperature control device according to claim 5, characterized in that: the outlet water temperature of the outlet water hose is controlled by a PID temperature controller, and the PID temperature controller is provided with eight input ports I₀~ I₇Has eight output ports, each is O₀~ O₇。

7. The intelligent water heater control device of claim 6, wherein: the cold water hose, the hot water hose and the water outlet hose are all steel wire hoses.

8. The intelligent water heater control device of claim 1, wherein: and the water heater shell and the insulating plate are provided with mounting holes for mounting the water heater shell and the insulating plate on a wall body.

9. A control method of a water outlet temperature control device of a water heater comprises the following steps:

1) temperature setting and displaying: inputting the set temperature T by a two-digit digital tube through a touch screen according to the requirement₀Setting the temperature T₀Input port I of PID temperature controller₀Input into a PID temperature controller through an output port O₀Outputting and displaying outwards;

2) and displaying the temperature of the heat source I: temperature T of heat source I₁The analog quantity is measured by the temperature sensor I, converted into digital quantity by the A/D converter and input port I of PID temperature controller₁Input into a PID temperature controller through an output port O₁Outputting and displaying the data outwards through a two-digit nixie tube;

3) automatic selection of heat source: when the temperature is not set, namely the two-position three-way electromagnetic directional valve is in a non-working state, the electromagnet YA in the two-position three-way electromagnetic directional valve is in a power-off state, at the moment, the first valve inlet is communicated with the valve outlet, the second valve inlet is blocked, and the first heat source is selected by default; heat source with temperature T₁When setting the temperature T₀≤T₁Time, temperature difference delta₁=T₁-T₀Not less than 0, at this time, the output port O of the PID temperature controller₂When the valve is arranged at 0, the electromagnet YA in the two-position three-way electromagnetic reversing valve controls the switch to be switched off, the electromagnet YA is powered off, at the moment, the first valve inlet of the two-position three-way electromagnetic reversing valve is communicated with the valve outlet, the second valve inlet is blocked, and the first heat source is automatically selected; when setting the temperature T₀＞T₁Time, temperature difference delta₁=T₁-T₀When the pressure is less than 0, the output port O2 of the PID temperature controller is arranged at 1, the electromagnet control switch in the two-position three-way electromagnetic directional valve is closed, the electromagnet YA is electrified, the valve body of the two-position three-way electromagnetic directional valve is attracted by the electromagnet YA, and the valve inlet II and the valve outlet II are connected at the same timeThe ports are communicated, the first valve inlet is blocked, the second heat source is automatically selected, and meanwhile, the output port O of the PID temperature controller₃The heating switch of the heat source II is closed, and the heat source II starts to heat;

4) and constant temperature control of the water outlet: temperature T of outlet water₂The analog quantity is measured by the temperature sensor II, converted into digital quantity by the A/D converter and then converted by the PID temperature controller inlet and outlet I₂Inputting into a PID temperature controller according to the set temperature T₀And the temperature T of the outlet water₂To control the temperature of the water to be constant, wherein the current and the voltage of the left coil are i₁、V₁The current and voltage of the right coil are i₂、V₂；

5) Safety alarm and reset, when the water pressure of cold water is too low, the temperature of outlet water is too high, namely T₂When the temperature is higher than 45 ℃, an output port O of the PID temperature controller₆1, the alarm switch is closed, the alarm is sounded, when the cold water pressure is recovered to normal, the cold water pressure is reset manually, and the input port I of the PID temperature controller₃Setting 1, operating by PID temperature controller to make PID temperature controller output port O₆And setting 0, disconnecting the alarm switch and closing the alarm.

10. The control method of the water heater outlet water temperature control device according to claim 9, wherein the specific method for controlling the outlet constant temperature is as follows:

1) when T is₀＞T₂Time, temperature difference delta₂=T₂-T₀When the pressure is higher than 0, the output port O of the PID temperature controller₄I.e. the current i of the left coil₁And voltage V₁Enlarged, outlet O₅I.e. the current i of the right coil₂And voltage V₂The valve core moves rightwards at the moment, so that the opening degree of the first water inlet is increased, the opening degree of the second water inlet is reduced, and the water outlet temperature T is increased₂Increasing until the temperature difference delta₂=0 i₁=i₂And V₁=V₂At the moment, the valve core is kept still, the opening degrees of the first water inlet and the second water inlet are kept unchanged, and the effect of keeping the temperature of the outlet water constant is achieved;

2）when T is₀=T₂Time, temperature difference delta₂=T₂-T₀Not less than 0, so that i₁=i₂、V₁=V₂At the moment, the valve core is kept unknown, and the opening degrees of the first water inlet and the second water inlet are kept unchanged;

3) when T is₀＜T₂Time, temperature difference delta₂=T₂-T₀< 0, at this time, the output port O of the PID temperature controller₄I.e. the current i of the left coil₁And voltage V₁Reduced, outlet O₅I.e. the current i of the right coil₂And voltage V₂Increasing, wherein the valve core moves leftwards at the moment, so that the opening degree of the first water inlet is reduced, the opening degree of the second water inlet is increased, and the water outlet temperature T is increased₂Decrease until the temperature difference delta₂=0 i₁=i₂And V₁=V₂And at the moment, the valve core is kept still, the opening degrees of the first water inlet and the second water inlet are kept unchanged, and the effect of keeping the temperature of the outlet water constant is achieved.

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