CN109612121B - Constant-temperature output control system and method for water heater - Google Patents
Constant-temperature output control system and method for water heater Download PDFInfo
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- CN109612121B CN109612121B CN201811615516.1A CN201811615516A CN109612121B CN 109612121 B CN109612121 B CN 109612121B CN 201811615516 A CN201811615516 A CN 201811615516A CN 109612121 B CN109612121 B CN 109612121B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- Domestic Plumbing Installations (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a constant temperature output control system of a water heater, which comprises a heater and also comprises: the water heater comprises a first water storage device and a second water storage device, wherein the second water storage device comprises a cold water tank and a hot water tank, and an extremely hot module, a first hot water pipe, a second hot water pipe, a first cold water pipe, a second cold water pipe, a shower head, a mixing switch and a system controller are arranged between the cold water tank and the hot water tank. And the system controller controls the first water flow control valve, the second water flow control valve and the third water flow control valve according to the target water temperature and flow rate. The invention can adaptively carry out adaptive intelligent water outlet control according to the water temperature and the water flow speed initially set by a user, improves the experience of the user and realizes the intellectualization of the water heater.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a constant temperature output control system and method for a water heater.
Background
In the existing life, the application of the water heater is very common, especially after the stability of power supply is improved, more and more people use the electric water heater to provide hot water in the city, then, when the electric water heater is used, the situation that the water pressure is stable can be met sometimes, for example, in an apartment with many residents on the same floor, because the time period of using water by people is the same time period, in the same time period, the water flow respectively flowing to each household is obviously influenced, when the water heater is used, the water flow is large and small, and because the water flow does not discharge water at the same speed, the hot water supply in the hot water pipe is not timely, the water pressure in the hot water pipe is insufficient, the water cannot be well mixed with cold water, the water temperature is high and low, the user experience of using the water heater is seriously influenced, in order to ensure the water temperature, the user needs to repeatedly adjust the water outlet switch, but still changes the water temperature repeated change caused by insufficient water flow speed.
Disclosure of Invention
The invention provides a constant temperature output control system of a water heater, which comprises a heater and also comprises: the system comprises a first water storage device and a second water storage device, wherein the second water storage device comprises a cold water tank and a hot water tank, and an extremely hot module, a first hot water pipe, a second hot water pipe, a first cold water pipe, a second cold water pipe, a shower head, a mixing switch and a system controller are arranged between the cold water tank and the hot water tank; the heater is arranged in the first water receiver, the first water receiver is connected with the hot water input end of the second water receiver through a communication pipe, a first water flow control valve is arranged on the communication pipe, the first water receiver is connected with the first input end of the mixing switch through the first hot water pipe, the output end of the hot water tank of the second water receiver is connected with the output end of the mixing switch through the second hot water pipe, the first cold water pipe is connected with the second input end of the mixing switch, and the output end of the mixing switch is connected with the shower head through the mixing water pipe; the output end of the hot water tank of the second water receiver is connected with the output end of the mixed water pipe through a second hot water pipe, and the cold water tank of the second water receiver is connected with the output end of the mixed switch through a second cold water pipe; a second water flow control valve is arranged at the output port of the second hot water pipe, and a third water flow control valve is arranged at the output port of the second cold water pipe; and the system controller controls the first water flow control valve, the second water flow control valve and the third water flow control valve according to the target water temperature and flow rate.
The constant temperature output control system of the water heater is characterized in that the heater and the extreme heat module are electric heaters.
The constant temperature output control system of the water heater is characterized in that a first water flow detector is arranged in a first hot water pipe, a second water flow detector is arranged in a cold water pipe, a third water flow detector is arranged in a mixed water pipe, a second temperature detector is arranged in a shower head, and a first temperature detector is arranged in a first water storage device.
The second water storage device is also provided with a pressurizing device. The pressurizing device pressurizes the second reservoir when the water flow rate is insufficient.
The mixing switch is a manual control switch.
According to the constant-temperature output control system of the water heater, the extremely hot module is used for extremely rapidly heating cold water in the second water storage device, so that the temperature of heated hot water is higher than five percent of the temperature of hot water flowing into the hot water tank from the first water storage device.
The beneficial technical effects obtained by the invention are as follows:
1. the random change of the water flow speed to the water outlet of the shower head is reduced, and the constant flow rate and the constant temperature of the water outlet of the shower head are maintained;
2. The temperature and the water flow are automatically tracked by primary control, so that the water flow is prevented from being large and small, and the temperature is prevented from being suddenly high and suddenly low;
3. the control is simple and convenient, and the user does not need to repeatedly adjust the water outlet switch. The invention controls the water flow to be always maintained at the temperature initially set by a user and the target value of the water flow by tracking the water flow speed, can allocate and track the mixture ratio of cold water and hot water in time by controlling the water flow speed, keeps the temperature constant, and maintains the water flow speed at the target value by additionally matching the hot water and the cold water and the self pressurizing device in cooperation with the opening degree of the water flow valve when the water flow speed is insufficient due to insufficient external water pressure so as to ensure that the output temperature of the water heater is constant.
4. The hot water temperature of the second water receiver is improved through the extremely hot module, and inaccurate temperature control caused by heat loss is reduced.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. In the drawings, like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a functional schematic diagram of a constant temperature output control system of a water heater according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
As shown in fig. 1, the present invention provides a constant temperature output control system for a water heater, which comprises a heater, and further comprises: the system comprises a first water storage device and a second water storage device, wherein the second water storage device comprises a cold water tank and a hot water tank, and an extremely hot module, a first hot water pipe, a second hot water pipe, a first cold water pipe, a second cold water pipe, a shower head, a mixing switch and a system controller are arranged between the cold water tank and the hot water tank; the heater is arranged in the first water receiver, the first water receiver is connected with the hot water input end of the second water receiver through a communication pipe, a first water flow control valve is arranged on the communication pipe, the first water receiver is connected with the first input end of the mixing switch through the first hot water pipe, the output end of the hot water tank of the second water receiver is connected with the output end of the mixing switch through the second hot water pipe, the first cold water pipe is connected with the second input end of the mixing switch, and the output end of the mixing switch is connected with the shower head through the mixing water pipe; the output end of the hot water tank of the second water receiver is connected with the output end of the mixed water pipe through a second hot water pipe, and the cold water tank of the second water receiver is connected with the output end of the mixed switch through a second cold water pipe; a second water flow control valve is arranged at the output port of the second hot water pipe, and a third water flow control valve is arranged at the output port of the second cold water pipe; and the system controller controls the first water flow control valve, the second water flow control valve and the third water flow control valve according to the target water temperature and flow rate.
In the water heater system, the heater and the extreme heat module are electric heaters.
The water heater system is characterized in that a first water flow detector is arranged in the first hot water pipe, a second water flow detector is arranged in the cold water pipe, a third water flow detector is arranged in the mixed water pipe, a second temperature detector is arranged in the shower head, and a first temperature detector is arranged in the first water storage device.
In the water heater system, the second water container is also provided with a pressurizing device. The pressurizing device pressurizes the second reservoir when the water flow rate is insufficient.
In the water heater system, the mixing switch is a manual control switch.
According to the constant-temperature output control system of the water heater, the extremely hot module is used for extremely rapidly heating cold water in the second water storage device, so that the temperature of heated hot water is higher than five percent of the temperature of hot water flowing into the hot water tank from the first water storage device.
Because the second water receiver is greatly smaller than the first water receiver, the quality of the water outlet of the second water receiver is also lower than that of the first water receiver to a great extent, in order to accurately control the temperature of the second water receiver flowing to the mixed water pipe and prevent the water from flowing out, the temperature of the hot water tank is improved by five percent through the extremely hot module, and the inaccurate temperature regulation caused by heat loss is reduced.
A constant temperature output control method of a water heater is applied to any one of the constant temperature output control systems of the water heater, and specifically comprises the following operation methods:
s1) receiving a second water temperature signal detected by the second temperature detector and a third water flow rate detected by the third water flow detector, generating water temperature T3 and flow rate V3 control target signals;
s2) measuring the water flow speed V1 and the temperature T1 in the first hot water pipe, and calculating a first parameter related to the water flow speed and the temperature;
s3) measuring the water flow speed V2 and the temperature T2 in the first cold water pipe, and calculating a second parameter related to the water flow speed and the temperature;
s4) tracking the first parameter and the second parameter;
s5) when the first parameter and the second parameter are changed, adjusting the second water flow control valve and the third water flow control valve to track the first parameter and the second parameter.
As described above, the calculating the first parameter associated with the water flow speed and the temperature specifically includes:
m1＝ρV1tS1
Q1＝cm1ΔT1
ΔT1＝T1-T3
wherein m1 is the quality of the outlet water of the hot water in T time, ρ is the density of the water, S1 is the cross-sectional area of the first hot water pipe, V1 is the water flow speed in the first hot water pipe, and T3 and V3 are water temperature and flow speed control target signals, respectively.
In the intelligent control method for the water heater, the second parameter m2 related to the water flow speed and the temperature is calculated to be rho V2tS2
Q2＝cm2ΔT2
ΔT2＝T3-T2
Wherein m2 is the quality of the outlet water of the cold water in time T, ρ is the density of the water, S2 is the cross-sectional area of the first cold water pipe, V2 is the water flow speed in the first cold water pipe, and T3 and V3 are water temperature and flow speed control target signals respectively.
Wherein, Q1 is the heat absorbed when the mixed water reaches the temperature of T3, and Q2 is the heat released when the hot water reaches the temperature of T3.
Tracking and measuring the V1 and the V2 to obtain a real-time flow rate V11 in a first hot water pipe and a real-time flow rate V22 in a first cold water pipe, calculating a difference value between the V11-V1 and the V22-V2, comparing the difference value with a set threshold value 0, when the V11-V1 is smaller than zero, calculating a first absolute value of the V11-V1, comparing the first absolute value with a preset opening control threshold value, and controlling a second water flow valve on a second hot water pipe to open an opening of a corresponding grade according to a comparison result;
and when the V22-V2 is less than zero, obtaining a second absolute value of the V22-V2, comparing the second absolute value with a preset opening control threshold value, and controlling a third water flow valve on a second cold water pipe to open the opening of the corresponding grade according to the comparison result.
And when the V11-V1 or the V22-V2 is larger than zero, controlling the third water flow valve to be reversely opened to reversely flow the water in the mixed water pipe to the cold water tank of the second water storage device.
The preset opening control threshold values comprise first, second, third, fourth, fifth and sixth preset opening control threshold values which respectively correspond to the opening degrees of the grades of the water flow valves. See in particular the following table:
the second water flow valve and the third water flow valve respectively comprise three fan-shaped structures, the three fan-shaped structures seal the cross sections of the whole second hot water pipe and the whole second cold water pipe together, the first-level opening degree is that the first fan blade is turned over for 30 degrees vertical to the cross section of the water pipe, and the second-level opening degree is that the first fan blade is turned over for 60 degrees vertical to the cross section of the water pipe; the third-level opening degree is that the second fan blade is turned over for 30 degrees perpendicular to the cross section of the water pipe, and the fourth-level opening degree is that the second fan blade is turned over for 60 degrees perpendicular to the cross section of the water pipe; the fifth-level opening degree is that the third fan blade is turned over for 30 degrees in a direction perpendicular to the cross section of the water pipe, and the sixth-level opening degree is that the third fan blade is turned over for 60 degrees in a direction perpendicular to the cross section of the water pipe.
The third water flow valve can turn over towards two directions at an angle so as to enable cold water to be discharged from the third water flow valve and be supplemented to the cold water tank of the second water receiver, the second water flow valve is turned over in a one-way mode, only water can be stored from the second water flow valve, and hot water is supplemented from the first water flow valve.
The beneficial technical effects obtained by the invention are as follows:
1. the random change of the water flow speed to the water outlet of the shower head is reduced, and the constant flow rate and the constant temperature of the water outlet of the shower head are maintained;
2. the temperature and the water flow are automatically tracked by primary control, so that the water flow is prevented from being large and small, and the temperature is prevented from being suddenly high and suddenly low;
3. the control is simple and convenient, and the user does not need to repeatedly adjust the water outlet switch. The invention controls the water flow to be always maintained at the temperature initially set by a user and the target value of the water flow by tracking the water flow speed, can allocate and track the mixture ratio of cold water and hot water in time by controlling the water flow speed, keeps the temperature constant, and maintains the water flow speed at the target value by additionally matching the hot water and the cold water and the self pressurizing device in cooperation with the opening degree of the water flow valve when the water flow speed is insufficient due to insufficient external water pressure so as to ensure that the output temperature of the water heater is constant.
4. The hot water temperature of the second water receiver is improved through the extremely hot module, and inaccurate temperature control caused by heat loss is reduced.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. It is therefore intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (6)
1. The utility model provides a water heater constant temperature output control system, includes the heater, its characterized in that still includes: the system comprises a first water storage device and a second water storage device, wherein the second water storage device comprises a cold water tank and a hot water tank, and an extremely hot module, a first hot water pipe, a second hot water pipe, a first cold water pipe, a second cold water pipe, a shower head, a mixing switch and a system controller are arranged between the cold water tank and the hot water tank; the heater is arranged in the first water receiver, the first water receiver is connected with the hot water input end of the second water receiver through a communication pipe, a first water flow control valve is arranged on the communication pipe, the first water receiver is connected with the first input end of the mixing switch through the first hot water pipe, the output end of the hot water tank of the second water receiver is connected with the output end of the mixing switch through the second hot water pipe, the first cold water pipe is connected with the second input end of the mixing switch, and the output end of the mixing switch is connected with the shower head through the mixing water pipe; the output end of the hot water tank of the second water receiver is connected with the output end of the mixed water pipe through a second hot water pipe, and the cold water tank of the second water receiver is connected with the output end of the mixed switch through a second cold water pipe; a second water flow control valve is arranged at the output port of the second hot water pipe, and a third water flow control valve is arranged at the output port of the second cold water pipe; the system controller controls the first water flow control valve, the second water flow control valve and the third water flow control valve according to the target water temperature and the flow rate; a third water flow detector is arranged in the mixed water pipe, a second temperature detector is arranged in the shower head,
The method specifically comprises the following operation methods:
s1) receiving a second water temperature signal detected by the second temperature detector and a third water flow rate detected by the third water flow detector, generating water temperature T3 and flow rate V3 control target signals;
s2) measuring the water flow speed V1 and the temperature T1 in the first hot water pipe, and calculating a first parameter related to the water flow speed and the temperature;
s3) measuring the water flow speed V2 and the temperature T2 in the first cold water pipe, and calculating a second parameter related to the water flow speed and the temperature;
s4) tracking the first parameter and the second parameter;
s5) when the first parameter and the second parameter are changed, adjusting the second water flow control valve and a third water flow control valve to track the first parameter and the second parameter;
the calculating of the first parameter associated with the water flow rate and the temperature specifically includes:
wherein m1 is the quality of the outlet water of the hot water in t time,
s1 is the cross-sectional area of the first hot water pipe, V1 is the water flow speed in the first hot water pipe, and T3 and V3 are water temperature and flow speed control target signals respectively;
the second parameter related to the calculated water flow speed and temperature
Wherein m2 is the quality of the outlet water of the cold water in t time, 
S2 is the cross-sectional area of the first cold water pipe, V2 is the water flow speed in the first cold water pipe, and T3 and V3 are water temperature and flow speed control target signals respectively;
wherein, Q1 is the heat absorbed when the mixed water reaches the temperature of T3, and Q2 is the heat released when the hot water reaches the temperature of T3;
tracking and measuring the V1 and the V2 to obtain a real-time flow rate V11 in a first hot water pipe and a real-time flow rate V22 in a first cold water pipe, calculating a difference value between the V11-V1 and the V22-V2, comparing the difference value with a set threshold value 0, when the V11-V1 is smaller than zero, calculating a first absolute value of the V11-V1, comparing the first absolute value with a preset opening control threshold value, and controlling a second water flow valve on a second hot water pipe to open an opening of a corresponding grade according to a comparison result;
when V22-V2 is smaller than zero, a second absolute value of V22-V2 is obtained, the second absolute value is compared with a preset opening control threshold value, and a third water flow valve on a second cold water pipe is controlled to open the opening of the corresponding grade according to the comparison result;
and when the V11-V1 or the V22-V2 is larger than zero, controlling the third water flow valve to be reversely opened to reversely flow the water in the mixed water pipe to the cold water tank of the second water storage device.
2. A water heater constant temperature output control system as claimed in claim 1, wherein the heater, the extreme heat module is an electric heater.
3. A water heater constant temperature output control system as claimed in claim 1, wherein a first water flow detector is provided in said first hot water pipe, a second water flow detector is provided in said cold water pipe, and a first temperature detector is provided in said first reservoir.
4. A water heater constant temperature output control system as recited in claim 1 wherein said second reservoir is further provided with pressurization means.
5. A water heater constant temperature output control system as set forth in claim 1, wherein said mixing switch is a manual control switch.
6. A water heater constant temperature output control system as recited in claim 1 wherein said extreme heat module provides extreme heat to the cold water in the second reservoir such that the heated hot water temperature is greater than five percent of the temperature of the hot water flowing from said first reservoir into said hot water tank.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102494160A (en) * | 2011-12-12 | 2012-06-13 | 湖北优佰瑞科技有限公司 | Constant temperature water outlet controller and constant temperature water supply system |
| CN103884105A (en) * | 2014-02-10 | 2014-06-25 | 浙江大学 | Constant-temperature bathing system |
| CN104596113A (en) * | 2015-01-14 | 2015-05-06 | 广东万家乐燃气具有限公司 | Constant-temperature gas water heater |
| CN107806709A (en) * | 2017-11-20 | 2018-03-16 | 珠海格力电器股份有限公司 | Water heater and water temperature adjusting method thereof |
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- 2018-12-27 CN CN201811615516.1A patent/CN109612121B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494160A (en) * | 2011-12-12 | 2012-06-13 | 湖北优佰瑞科技有限公司 | Constant temperature water outlet controller and constant temperature water supply system |
| CN103884105A (en) * | 2014-02-10 | 2014-06-25 | 浙江大学 | Constant-temperature bathing system |
| CN104596113A (en) * | 2015-01-14 | 2015-05-06 | 广东万家乐燃气具有限公司 | Constant-temperature gas water heater |
| CN107806709A (en) * | 2017-11-20 | 2018-03-16 | 珠海格力电器股份有限公司 | Water heater and water temperature adjusting method thereof |
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