CN205316687U - Remotely adjusting temperature and constant temperature gas heater who takes cold water heat compensation control - Google Patents
Remotely adjusting temperature and constant temperature gas heater who takes cold water heat compensation control Download PDFInfo
- Publication number
- CN205316687U CN205316687U CN201620000673.1U CN201620000673U CN205316687U CN 205316687 U CN205316687 U CN 205316687U CN 201620000673 U CN201620000673 U CN 201620000673U CN 205316687 U CN205316687 U CN 205316687U
- Authority
- CN
- China
- Prior art keywords
- water
- hot
- temperature
- cold water
- hot water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a remotely adjusting temperature and constant temperature gas heater who takes cold water heat compensation control, constant temperature gas heater is including a cold water water inlet and two hot water delivery ports, adopts the export hot water temperature by the worth relatively method remotely adjusting constant temperature gas heater of two way hot water flow of water valve controller, when the entry cool water flowrate's of the relative cold water water inlet of the export hot water flow of first hot water delivery port ratio increase, improve export hot water temperature, otherwise, reduce export hot water temperature. Constant temperature gas heater's temperature control adopts PID combination entry cold water temperature, flow feedforward compensation's algorithm, has reduced entry cold water temperature and the interference of variation in discharge to constant temperature gas heater's export hot water temperature, has improved control accuracy. The method need not wiredly or the wireless remote control ware, can realize constant temperature gas heater hot water temperature's remotely adjusting, and control results is reliable and stable.
Description
Technical field
This utility model relates to a kind of constant temp gas water heater, especially a kind of remote adjustment temperature and the constant temp gas water heater controlled with cold water heat compensation.
Background technology
If constant temp gas water heater temperature sets improper, to make troubles to people, particularly when shower, the constant temp gas water heater temperature without wireless remote control or remote line traffic control cannot regulate, and is easily caused again constant temp gas water heater with water mixing valve interpolation cold water and stops working. Adopting wireless remote control regulating thermostatic gas and hot water actuator temperature, by the restriction of installation site, a lot of occasion remote controller signals are not transferred to constant temp gas water heater. When adopting remote line traffic control mode, special waterproof wire remote control devices cost is high, it is necessary to sunkens cord in advance, works for a long time under the wet environments such as bathroom, and the wire remote control devices fault rate of electronic type is high.
Summary of the invention
The purpose of this utility model is to provide a solution for the hot water temperature of distant control constant temp gas water heater, namely can regulate the constant temp gas water heater of temperature at a distance.
To achieve these goals, this utility model provides a kind of remote adjustment temperature and the constant temp gas water heater controlled with cold water heat compensation, including:
Described constant temp gas water heater includes controller, heat exchanger, the first Hall water flow sensor, the second Hall water flow sensor, cold water temperature sensor, hot water temperature sensor, gas flow control driving module, the first hot water outlet, the second hot water outlet, cold water inlet and cold water pipe, main hot-water line, the first hot-water line, the second hot-water line.
Described cold water pipe is connected between cold water inlet and heat exchanger; One end of described first hot-water line is connected to the first hot water outlet, and other end is communicated to main hot-water line water side; One end of described second hot-water line is connected to the second hot water outlet, and other end is communicated to main hot-water line water side;The water intake end of described main hot-water line is connected to heat exchanger.
Described first Hall water flow sensor is arranged on cold water pipe, or is arranged on the main hot-water line of main hot-water line, for detecting the entrance cold water flow of cold water water inlet; Described second Hall water flow sensor is arranged on the first hot-water line, for detecting outlet hot water's flow of the first hot water outlet; Described cold water temperature sensor is arranged on cold water pipe, for detecting the entrance cold water temperature of cold water inlet; Described hot water temperature sensor is arranged on main hot-water line, for detecting outlet hot water's temperature of constant temp gas water heater.
Described first Hall water flow sensor is provided with the first pulse signal output end, and the second Hall water flow sensor is provided with the second pulse signal output end; Described controller is provided with the first pulse signal input terminal and the second pulse signal input terminal, and described first pulse signal input terminal, the second pulse signal input terminal are respectively connecting to the first pulse signal output end, the second pulse signal output end.
Described cold water temperature sensor is provided with cold water temperature signal output part, and hot water temperature sensor is provided with hot water temperature's signal output part, and gas flow controls to drive module to be provided with gas valve driving signal input; Described controller is additionally provided with cold water temperature signal input part, hot water temperature's signal input part, gas valve driving signal output part; Described cold water temperature signal input part is connected to cold water temperature signal output part, and hot water temperature's signal input part is connected to hot water temperature's signal output part, and gas valve drives signal output part to be connected to gas valve driving signal input.
First hot water outlet of described constant temp gas water heater, the second hot water outlet are connected to 2 water inlets of water mixing valve respectively by water pipe. Or, the first hot water outlet of described constant temp gas water heater, the second hot water outlet are connected to the water inlet of the first adjustment valve, the second adjustment valve respectively by water pipe; Described first adjustment valve, the second outlet connection regulating valve are a water side.
Described first Hall water flow sensor, the second Hall water flow sensor are the Hall water flow sensor of same range ability.
Described gas flow controls to drive module to be made up of gas ratio valve and associated driver circuitry.
Described constant temp gas water heater also includes power module, air-blower control drives module, IGNITION CONTROL and flame detection modules.
The beneficial effects of the utility model are, it is not necessary to wired or Digiplex, adopt and control two-way hot water flow change desired temperature by water valve, it is achieved the remote adjustment of constant temp gas water heater hot water temperature; In conjunction with the method for entrance cold water temperature Yu flow-compensated heating power, reduce entrance cold water temperature and the changes in flow rate interference to outlet hot water's temperature of constant temp gas water heater, alleviate the control burden of temperature controller, improve control accuracy.
Accompanying drawing explanation
Fig. 1 is remote adjustment temperature and constant temp gas water heater embodiment 1 structured flowchart controlled with cold water heat compensation.
Fig. 2 is remote adjustment temperature and constant temp gas water heater embodiment 2 structured flowchart controlled with cold water heat compensation.
Fig. 3 is constant temp gas water heater detection control circuit theory diagram.
Fig. 4 is the control system principle diagram of constant temp gas water heater.
Fig. 5 is temperature regulable control flow chart.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Remote adjustment temperature and constant temp gas water heater embodiment 1 structured flowchart with the control of cold water heat compensation are as shown in Figure 1, wherein, constant temp gas water heater includes heat exchanger the 101, first Hall water flow sensor the 201, second Hall water flow sensor 202, cold water temperature sensor 206, hot water temperature sensor's the 207, first hot water outlet the 203, second hot water outlet 204, cold water inlet 205, cold water pipe 401, main hot-water line the 402, first hot-water line the 403, second hot-water line 404; And water mixing valve the 301, first connecting water pipe 405, second connecting water pipe 406 of remote adjustment temperature, heat of mixing water pipe 407, Water outlet spray head 302 is jointly realized with constant temp gas water heater.
Described constant temp gas water heater has 1 cold water inlet and 2 hot water outlets, and cold water pipe 401 is connected between cold water inlet 205 and heat exchanger 101; One end of first hot-water line 403 is connected to the first hot water outlet 203, and other end is communicated to main hot-water line 402 water side; One end of second hot-water line 404 is connected to the second hot water outlet 204, and other end is communicated to main hot-water line 402 water side; The water intake end of main hot-water line 402 is connected to heat exchanger 101. First Hall water flow sensor 201 is arranged on cold water pipe 401, or is arranged on main hot-water line 402. Second Hall water flow sensor 202 is arranged on the first hot-water line 403.
2 water inlets of water mixing valve 301 are connected to first hot water outlet the 203, second hot water outlet 204 of constant temp gas water heater respectively by first connecting water pipe the 405, second connecting water pipe 406; The outlet of water mixing valve 301 is connected to Water outlet spray head 302 by heat of mixing water pipe 407. Cold water temperature sensor 206 is arranged on cold water pipe 401; Hot water temperature sensor 207 is arranged on main hot-water line 402.
Remote adjustment temperature and constant temp gas water heater embodiment 2 structured flowchart with the control of cold water heat compensation, as in figure 2 it is shown, be different in that with embodiment 1, use the first adjustment valve 303, second to regulate valve 304 and replace water mixing valve 301; First water inlet regulating valve 303 is connected to the first hot water outlet 203 of constant temp gas water heater through the first connecting water pipe 405, and the second water inlet regulating valve 304 is connected to the second hot water outlet 204 of constant temp gas water heater through the second connecting water pipe 406. The first outlet connection regulating valve the 303, second adjustment valve 304 is that a water side is connected with heat of mixing water pipe 407.
Described constant temp gas water heater also includes controller 210, gas flow controls to drive module 211, and constant temp gas water heater detection control circuit theory diagram is as shown in Figure 3. First Hall water flow sensor 201 is provided with the first pulse signal output end OUT1, and for detecting the entrance cold water flow of cold water water inlet 205, the signal type of the first pulse signal is pulse frequency. Second Hall water flow sensor 202 is provided with the second pulse signal output end OUT2, and for detecting outlet hot water's flow of the first hot water outlet 203, the signal type of the second pulse signal is pulse frequency. Cold water temperature sensor 206 is provided with cold water temperature signal output part OUT3, and for detecting the entrance cold water temperature of cold water inlet 205, cold water temperature signal is the signal of telecommunication, and signal type is digital signal, or voltage, or is electric current. Hot water temperature sensor 207 is provided with hot water temperature signal output part OUT5, and for detecting outlet hot water's temperature of constant temp gas water heater, hot water temperature's signal is the signal of telecommunication, and signal type is digital signal, or voltage, or is electric current.
Gas flow controls to drive module 211 to be provided with gas valve driving signal input IN4, and for driving the aperture controlling burnt gas valve, combustion gas valve drive signal is the signal of telecommunication, and signal type is pwm pulse, or voltage, or is electric current.
Controller 210 is provided with the first pulse signal input terminal IN1, the second pulse signal input terminal IN2; First pulse signal input terminal IN1, the second pulse signal input terminal IN2 are respectively connecting to the first pulse signal output end OUT1, the second pulse signal output end OUT2.
Controller 210 is additionally provided with cold water temperature signal input part IN3, hot water temperature signal input part IN5, gas valve driving signal output part OUT4; Cold water temperature signal input part IN3 is connected to cold water temperature signal output part OUT3, and hot water temperature signal input part IN5 is connected to hot water temperature signal output part OUT5, and gas valve drives signal output part OUT4 to be connected to gas valve driving signal input IN4.
As shown in Figure 4, control principle is as follows for the control system principle diagram of described constant temp gas water heater:
Regulating mixed water valve 301, or adjustment the first adjustment valve 303, second regulates valve 304 and changes outlet hot water's flow of first hot water outlet the 203, second hot water outlet 204, the entrance cold water flow of cold water water inlet 205 is outlet hot water's flow sum of the first hot water outlet 203 and the second hot water outlet 204. By the ratio remote adjustment desired temperature between outlet hot water's flow of the second hot water outlet 204 and the entrance cold water flow of cold water water inlet 205T0; If outlet hot water's flow of the entrance cold water flow of cold water water inlet 205, the first hot water outlet 203 is respectivelyQ1、Q2, then whenQ2 is relativeQDuring 1 increase, desired temperatureT0 increases; WhenQ2 is relativeQ1 relatively reduced time, desired temperatureT0 reduces. Desired temperatureT0 according to formula
It is calculated, wherein,TLIt is minimum temperature setting value,KIt it is temperature regulating range coefficient. The water temperature control interval of water heater is usually between 30 DEG C to 80 DEG C. SelectTL=35 DEG C,K=35, then desired temperatureT0 is controlled between 35-70 DEG C. Desired temperatureT0 increases, then outlet hot water's temperature of constant temp gas water heater improves; Desired temperatureT0 reduces, then outlet hot water's temperature of constant temp gas water heater reduces.
Temperature controller in controller 210 is according to desired temperatureT0 and hot water temperatureTBetween deviation valueECalculate the aperture controlling value obtaining burnt gas valveR1, the control algolithm of temperature controller adopts pid algorithm.
The compensating controller in the controller 210 entrance cold water temperature according to cold water inlet 205T2 and entrance cold water flowQ1, calculate the aperture offset obtaining burnt gas valveR2, the aperture of burnt gas valve is carried out feedforward compensation. Compensating the principle controlled is: the heat difference flowing into cold water according to unit interval inner cold water water inlet 205 calculates the heating power needing to compensate; When the heat difference that unit interval inner cold water water inlet 205 flows into cold water increases, increase the aperture of burnt gas valve, increase the heating power compensated; When the heat subtractive that unit interval inner cold water water inlet 205 flows into cold water is little, reduce the aperture of burnt gas valve, reduce the heating power compensated.
The aperture offset of burnt gas valveR2 according to formula
It is calculated, wherein,T1 is standard of compensation temperature value, and interval is 30～40, and representative value is 35;K1 is penalty coefficient, if the aperture controlling value of burnt gas valveRThe codomain interval of 1 is 0～1, then penalty coefficientKThe interval of 1 is 0～0.002, and representative value is 0.001.T1-T2 for compensating temperature difference, and unit interval inner cold water water inlet 205 flows into heat difference and the compensation temperature difference of cold waterT1-T2 and entrance cold water flowQProduct between 1 is proportional relationship.
Compensate and control to reduce the change of entrance cold water temperature and the changes in flow rate interference to outlet hot water's temperature of constant temp gas water heater, alleviate the control burden of temperature controller, improve control accuracy.
The controller 210 aperture controlling value according to burnt gas valveR1 and the aperture offset of burnt gas valveRThe aperture of burnt gas valve is controlled by 2 sums, thus changing the hot exchange power of heat exchanger, maintains outlet hot water's temperature stabilization of temperature constant temp gas water heater.
Described flowQ1、QThe unit of 2 is L/min; Desired temperatureT0, minimum temperature setting valueTL, hot water temperatureT, entrance cold water temperatureT2, standard of compensation temperature valueTThe unit of 1 is DEG C.
FlowQ1、QThe 2 pulse frequency direct proportionality exported with first Hall water flow sensor the 201, second Hall water flow sensor 202 respectively.
Described controller 210 is made up of microcontroller and peripheral circuit. The preferred single-chip microcomputer of microcontroller, or select other devices such as ARM, DSP. First pulse signal input terminal IN1, the second pulse signal input terminal IN2 are the counting input end of microcontroller enumerator.
When the cold water temperature signal of cold water temperature sensor 206 output and hot water temperature's signal of hot water temperature sensor 207 output are digital signal, cold water temperature signal input part IN3, hot water temperature signal input part IN5 are the corresponding interface that microcontroller mates with cold water temperature sensor 206, hot water temperature sensor 207 output interface.
Some or all of for analogue signal when in cold water temperature signal, hot water temperature's signal, it is voltage, or during electric current, in cold water temperature signal input part IN3, hot water temperature signal input part IN5, corresponding port is the input end of analog signal of A/D converter. Described A/D converter reads data by microprocessor controls and by microcontroller, it is preferable that described A/D converter includes at microcontroller.
Described gas flow controls to drive module 211 to be made up of gas ratio valve and associated driver circuitry, the preferred pwm pulse of combustion gas valve drive signal.
Described constant temp gas water heater also includes air-blower control and drives module, IGNITION CONTROL and flame detection modules etc. Further, described constant temp gas water heater also optionally includes the part of module in temperature value display module, blast detection module, buzzer module or whole module.
Described constant temp gas water heater also includes power module, for controlling to drive module 211 and other module for power supply to controller the 210, first Hall water flow sensor the 201, second Hall water flow sensor 202, cold water temperature sensor 206, hot water temperature sensor 207, gas flow.
Controller 210 carries out the flow process of temperature regulable control as it is shown in figure 5, the step of temperature control method is:
Step S1, initializes;
Step S2, the outlet hot water's flow to the entrance cold water flow of cold water water inlet 205, the first hot water outlet 203Q1、Q2 sample; Entrance cold water temperature to cold water inlet 205T2 and outlet hot water's temperature of constant temp gas water heaterTSample;
Step S3, calculates desired temperatureT0;
Step S4, calculates the aperture controlling value of burnt gas valveR1; Calculate the aperture offset of burnt gas valveR2;
Step S5, according toR1、R2 apertures changing burnt gas valve, change heat exchanger power, control outlet hot water's temperature of constant temp gas water heaterT;
Step S6, other process and wait; Sampling instant next time then, forwards step S2 to.
Controller 210, except the combustion power controlling constant temp gas water heater, is also performed to other controls of constant temp gas water heater. Described other process and wait, the air-blower control driving that needed including controller 210, IGNITION CONTROL etc., and wait.
Described in determining, the method then of sampling instant next time is, controller 210 adopts software delay, or intervalometer timing realizes.
The Hall water flow sensor of the described first Hall water flow sensor preferred same range ability of the 201, second Hall water flow sensor 202.
Described cold water temperature sensor 206, the preferred integrated sensor with digital signal output interface of hot water temperature sensor 207.
No matter the core of controller 210 is preferred single-chip microcomputer, or selects other devices such as ARM, DSP, realizes flow, temperature sampling with it, and carrying out temperature adjustment is the routine techniques that those skilled in the art is grasped.
The foregoing is only embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations. All within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within right of the present utility model.
Claims (6)
1. a remote adjustment temperature and the constant temp gas water heater with the control of cold water heat compensation, it is characterised in that:
Described constant temp gas water heater includes controller, heat exchanger, the first Hall water flow sensor, the second Hall water flow sensor, cold water temperature sensor, hot water temperature sensor, gas flow control driving module, the first hot water outlet, the second hot water outlet, cold water inlet and cold water pipe, main hot-water line, the first hot-water line, the second hot-water line;
Described cold water pipe is connected between cold water inlet and heat exchanger; One end of described first hot-water line is connected to the first hot water outlet, and other end is communicated to main hot-water line water side; One end of described second hot-water line is connected to the second hot water outlet, and other end is communicated to main hot-water line water side; The water intake end of described main hot-water line is connected to heat exchanger;
Described first Hall water flow sensor is arranged on cold water pipe, or is arranged on the main hot-water line of main hot-water line, for detecting the entrance cold water flow of cold water water inlet; Described second Hall water flow sensor is arranged on the first hot-water line, for detecting outlet hot water's flow of the first hot water outlet; Described cold water temperature sensor is arranged on cold water pipe, for detecting the entrance cold water temperature of cold water inlet; Described hot water temperature sensor is arranged on main hot-water line, for detecting outlet hot water's temperature of constant temp gas water heater;
Described first Hall water flow sensor is provided with the first pulse signal output end, and the second Hall water flow sensor is provided with the second pulse signal output end; Described controller is provided with the first pulse signal input terminal and the second pulse signal input terminal, and described first pulse signal input terminal, the second pulse signal input terminal are respectively connecting to the first pulse signal output end, the second pulse signal output end; Described cold water temperature sensor is provided with cold water temperature signal output part, and hot water temperature sensor is provided with hot water temperature's signal output part, and gas flow controls to drive module to be provided with gas valve driving signal input; Described controller is additionally provided with cold water temperature signal input part, hot water temperature's signal input part, gas valve driving signal output part;Described cold water temperature signal input part is connected to cold water temperature signal output part, and hot water temperature's signal input part is connected to hot water temperature's signal output part, and gas valve drives signal output part to be connected to gas valve driving signal input.
2. remote adjustment temperature as claimed in claim 1 and the constant temp gas water heater with the control of cold water heat compensation, it is characterised in that: the first hot water outlet of described constant temp gas water heater, the second hot water outlet are connected to 2 water inlets of water mixing valve respectively by water pipe.
3. remote adjustment temperature as claimed in claim 1 and the constant temp gas water heater with the control of cold water heat compensation, it is characterised in that: the first hot water outlet of described constant temp gas water heater, the second hot water outlet are connected to the water inlet of the first adjustment valve, the second adjustment valve respectively by water pipe; Described first adjustment valve, the second outlet connection regulating valve are a water side.
4. remote adjustment temperature as claimed in claim 1 and the constant temp gas water heater with the control of cold water heat compensation, it is characterised in that: described first Hall water flow sensor, the second Hall water flow sensor are the Hall water flow sensor of same range ability.
5. remote adjustment temperature as claimed in claim 1 and the constant temp gas water heater with the control of cold water heat compensation, it is characterised in that: described gas flow controls to drive module to be made up of gas ratio valve and associated driver circuitry.
6. remote adjustment temperature as claimed in claim 1 and the constant temp gas water heater with the control of cold water heat compensation, it is characterised in that: described constant temp gas water heater also includes power module, air-blower control drives module, IGNITION CONTROL and flame detection modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620000673.1U CN205316687U (en) | 2016-01-04 | 2016-01-04 | Remotely adjusting temperature and constant temperature gas heater who takes cold water heat compensation control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620000673.1U CN205316687U (en) | 2016-01-04 | 2016-01-04 | Remotely adjusting temperature and constant temperature gas heater who takes cold water heat compensation control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205316687U true CN205316687U (en) | 2016-06-15 |
Family
ID=56200592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620000673.1U Expired - Fee Related CN205316687U (en) | 2016-01-04 | 2016-01-04 | Remotely adjusting temperature and constant temperature gas heater who takes cold water heat compensation control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205316687U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958932A (en) * | 2017-04-27 | 2017-07-18 | 广东万和新电气股份有限公司 | Gas heater |
| CN107883392A (en) * | 2017-10-27 | 2018-04-06 | 北京中电联节能技术有限公司 | Feedforward neural network control method and system suitable for flue gas waste heat recovery apparatus |
-
2016
- 2016-01-04 CN CN201620000673.1U patent/CN205316687U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958932A (en) * | 2017-04-27 | 2017-07-18 | 广东万和新电气股份有限公司 | Gas heater |
| CN107883392A (en) * | 2017-10-27 | 2018-04-06 | 北京中电联节能技术有限公司 | Feedforward neural network control method and system suitable for flue gas waste heat recovery apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105571142A (en) | Constant-temperature gas water heater with remote temperature regulation and cold water heat compensation control functions | |
| CN105466035A (en) | Constant-temperature gas water heater remotely regulating temperature and having output gain self-adaptive adjustment function | |
| CN205316687U (en) | Remotely adjusting temperature and constant temperature gas heater who takes cold water heat compensation control | |
| CN102878328A (en) | Electronic intelligent constant-temperature constant-flow valve | |
| CN205316652U (en) | Remotely adjusting temperature and constant temperature gas heater who takes control of cold water temperature compensating | |
| CN105444425A (en) | Constant-temperature gas-fired water heater with remote temperature adjustment and cold water temperature compensation control functions | |
| CN110344470A (en) | Water system | |
| CN105444426A (en) | Gas-fired water heater with remote temperature adjustment function | |
| CN105526713A (en) | Temperature regulation method of gas water heater | |
| CN205316686U (en) | Remotely adjusting combustion power's gas heater | |
| CN105509329A (en) | Adjusting method of set temperature value of constant-temperature gas water heater | |
| CN205383792U (en) | Constant temperature gas heater of remote control temperature setting value | |
| CN205448340U (en) | Gas heater of remotely adjusting temperature | |
| CN105605786A (en) | Temperature-constant gas water heater capable of remotely controlling temperature setting value | |
| CN205533153U (en) | Real -time water temperature control device that mixes | |
| CN106642300A (en) | Method and device for automatically controlling water temperature | |
| CN205481805U (en) | Constant temperature gas heater of remote control temperature setting value | |
| CN105526714A (en) | Gas water heater with remotely-regulated combustion power | |
| CN205481821U (en) | Intelligence intensification gas heater | |
| CN101504187B (en) | Electric water heater | |
| CN105509330A (en) | Method for regulating combustion power of gas water heater | |
| CN105571144A (en) | Temperature setting method of constant-temperature gas water heater | |
| CN105509302A (en) | Constant-temperature gas water heater with function of remote control on given temperature value | |
| CN105605785A (en) | Method for setting temperature of constant-temperature gas water heater | |
| CN105571143A (en) | Thermal power regulation method of gas water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20170104 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |