CN109520130B - Heat pump water heater pollution discharge control method and heat pump water heater - Google Patents
Heat pump water heater pollution discharge control method and heat pump water heater Download PDFInfo
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- CN109520130B CN109520130B CN201710851755.6A CN201710851755A CN109520130B CN 109520130 B CN109520130 B CN 109520130B CN 201710851755 A CN201710851755 A CN 201710851755A CN 109520130 B CN109520130 B CN 109520130B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 166
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000012790 confirmation Methods 0.000 claims abstract description 17
- 230000007423 decrease Effects 0.000 claims abstract description 10
- 239000010865 sewage Substances 0.000 claims description 37
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 238000009825 accumulation Methods 0.000 abstract description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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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
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a heat pump water heater pollution discharge control method and a heat pump water heater.A judgment is made whether the water temperature in a water tank continuously drops a set temperature and the number of times that the time of dropping a second set temperature is less than the set time is greater than the set number of times and/or whether the water temperature in the water tank is greater than a threshold temperature in each detection period; if so, adding one to the pollution discharge value, and judging whether the pollution discharge value is greater than a pollution discharge threshold value or not; if yes, emission indication information is sent. The user can in time trigger the blowdown button and produce blowdown confirmation signal after receiving blowdown indicating information to make heat pump water heater begin the blowdown descaling, guarantee that the scale deposit can in time be cleared up and avoid piling up the reduction that causes quality of water decline or heating efficiency. Compared with the prior art that the user is required to automatically start the pollution discharge function according to the set time interval, the pollution discharge control method can actively remind the user to start the pollution discharge function, timely eliminate scale and solve the technical problem of scale accumulation of the existing heat pump water heater.
Description
Technical Field
The invention belongs to the technical field of heat pump water heaters, and particularly relates to a heat pump water heater pollution discharge control method and a heat pump water heater.
Background
The air energy heat pump water heater absorbs low-temperature heat in air, the low-temperature heat is gasified through a fluorine medium, then the fluorine medium is compressed by the compressor and then is pressurized and heated, the fluorine medium is converted by the heat exchanger to supply water for heating, and the compressed high-temperature heat energy is used for heating water temperature.
The existing heat pump water heater has the problems that the water source of a water tank is not clean, and the calcium and magnesium ions of tap water are too much, more and more scales and impurities are accumulated at the bottom of the water tank after long-time use, the scaling tendency is started to occur when the water temperature is heated to 40 ℃, and the scaling speed is obviously accelerated when the water temperature is heated to 60-70 ℃. Scales, which have a poor ability to transfer heat, less than 1% of iron or glass, are increasing and can cause undesirable consequences such as reduced water quality and reduced heating efficiency during use of the water heater.
The existing heat pump water heater is designed with manual pollution discharge and scaling, but a user hardly forms a habit of regularly and manually discharging pollution, so that the technical problems of water quality reduction, heating efficiency reduction and the like caused by too much scaling accumulation are solved.
Disclosure of Invention
The application provides a heat pump water heater pollution discharge control method and a heat pump water heater, and solves the technical problem of scaling accumulation of an existing heat pump water heater.
In order to solve the technical problems, the application adopts the following technical scheme:
a pollution discharge control method for a heat pump water heater is provided, which comprises the following steps: in each detection period, judging whether the water temperature in the water tank continuously drops to a set temperature and whether the time of dropping the second set temperature is less than the set time is more than the set time and/or judging whether the water temperature in the water tank is more than the threshold temperature; if so, adding one to the pollution discharge value, and judging whether the pollution discharge value is greater than a pollution discharge threshold value; if yes, sending out pollution discharge indication information; the water temperature in the water tank is obtained by any water temperature sensor arranged in the water tank.
Further, after the emission of the pollution discharge indication information, the method further comprises: judging whether a pollution discharge confirmation signal is received or not; if yes, the pollution discharge function is started according to the set time length.
Further, the emission indication information is specifically: lighting a pollution discharge indicator lamp; when the blowdown function is activated for a set time period, the method further includes: and controlling the pollution discharge indicator lamp to flash according to a set rule.
Further, if the blowdown confirmation signal is not received, the method further includes: and sending out pollution discharge indication information in the next detection period after the current detection period is finished.
Further, after the blowdown function is started according to the set time length, the method further includes: judging whether the execution of the pollution discharge function is finished or not, and if so, detecting whether the pollution discharge index is met or not; if not, the pollution discharge indication information is sent again.
The heat pump water heater comprises a water tank, a pollution discharge module arranged in the water tank and a water temperature sensor arranged in the water tank, wherein the pollution discharge module comprises a pollution discharge detection unit, a pollution discharge value judgment unit and a pollution discharge indication unit; the blowdown detection unit is used for judging whether the water temperature in the water tank continuously drops to a set temperature and the times that the time of dropping the second set temperature is less than the set time is greater than the set times or not and/or judging whether the water temperature in the water tank is greater than the threshold temperature or not in each detection period; if yes, adding one to the pollution discharge value; the blowdown value judging unit is used for judging whether the blowdown value is greater than a blowdown threshold value; if yes, the pollution discharge indicating unit is used for sending pollution discharge indicating information; wherein, the water temperature in the water tank is obtained by any one of the water temperature sensors.
Further, the heat pump water heater also comprises a pollution discharge key; the pollution discharge module also comprises a pollution discharge control unit; the blowdown key is used for generating a blowdown confirmation signal after being triggered; and the sewage discharge control unit is used for judging whether the sewage discharge confirmation signal is received or not, and if so, starting the sewage discharge function according to set time length.
Further, the pollution discharge indicating unit is a pollution discharge indicating lamp; the blowdown control unit is also used for controlling the blowdown indicating lamp to be lightened when the blowdown value judging unit judges that the blowdown value is greater than the blowdown threshold value; and when the blowdown control unit starts the blowdown function according to the set time length, the blowdown indicating lamp is controlled to flicker according to the set rule.
Further, the pollution discharge module also comprises a pollution discharge index detection unit; the blowdown index detection unit is used for judging whether the blowdown function is finished after the blowdown control unit starts the blowdown function according to the set time length, and detecting whether the blowdown index is met after the blowdown function is finished; and if not, the pollution discharge control unit is also used for controlling the pollution discharge indicating unit to send the pollution discharge indicating information again.
Furthermore, the heat pump water heater also comprises a sewage discharge pipe connected with the water tank and an angle valve connected to the sewage discharge pipe.
Compared with the prior art, the application has the advantages and positive effects that: in the heat pump water heater pollution discharge control method and the heat pump water heater provided by the application, in each detection period, the judgment of the times that the water temperature in the water tank continuously decreases to a set temperature and the time that the water temperature decreases to a second set temperature of 1 ℃ for example is less than the set time and/or the judgment that the water temperature in the water tank is greater than the threshold temperature are carried out, if the judgment times are greater than the set times and/or the water temperature is greater than the threshold water temperature, the situation that repeated heating is caused by water consumption of a user or the situation that high water temperature continues can be judged to occur in one detection period, the situation can cause the occurrence of scaling phenomenon, the pollution discharge value is increased by 1, otherwise the pollution discharge value is kept unchanged, when the judgment of a plurality of detection periods is carried out until the pollution discharge value reaches the pollution discharge threshold value, for example 90, the heat pump water heater needs to discharge at least once to ensure that scaling can be cleaned in time, the method for controlling the pollution discharge of the heat pump water heater comprises the steps of sending pollution discharge indication information in time, enabling a user to know the scaling condition of the heat pump water heater in time, and starting the pollution discharge function in time.
When a user receives the pollution discharge indication information and triggers the pollution discharge key to send a pollution discharge confirmation signal to start the pollution discharge function, the pollution discharge module starts the pollution discharge function to discharge the heat pump water heater according to a set time length, for example, 120 seconds, the pollution discharge indication lamp flickers to prompt that the pollution discharge is in progress in the pollution discharge process, whether the pollution discharge index meets the requirement or not is detected after the pollution discharge is finished, and when the requirement is not met or the pollution discharge confirmation information of the user is not received after the pollution discharge indication information is sent, the pollution discharge indication information is continuously sent to prompt the user to discharge the pollution in time.
An angle valve is added on the sewage draining pipeline, so that a user can finish sewage draining through manual operation, the safety of sewage draining is improved, and the problem of uncontrollable risk is reduced.
Other features and advantages of the present application will become more apparent from the detailed description of the embodiments of the present application when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a flowchart of a heat pump water heater pollution discharge control method provided by the present application. (ii) a
Fig. 2 is a functional architecture diagram of the heat pump water heater provided by the present application.
Detailed Description
The following describes embodiments of the present application in further detail with reference to the accompanying drawings.
The heat pump water heater pollution discharge control method provided by the application is shown in fig. 1 and comprises the following steps:
step S11: and in each detection period, judging whether the water temperature in the water tank continuously drops to the set temperature and whether the time of dropping the second set temperature is less than the set time is more than the set time and/or judging whether the water temperature in the water tank is more than the threshold temperature.
In each detection period, for example, in each 24 hours, the following judgment is made:
mode A: judging whether the water temperature in the water tank continuously decreases by a set temperature and whether the frequency that the time of decreasing the second set temperature is less than the set time is greater than the set frequency, for example, judging whether the frequency that the water temperature continuously decreases by 10 ℃ and the time of decreasing by 1 ℃ each time is less than 2 minutes is greater than 1 time; if this occurs, it is indicated that a user water use event has occurred during a detection period, and this event has the consequence of causing the water in the tank to be heated repeatedly, which condition leads to an accelerated fouling phenomenon. Or
Mode B: whether the temperature of the water in the water tank is higher than a threshold temperature is judged, for example, whether the temperature of the water in the water tank is higher than 60 ℃ is judged, if the condition exists, the high water temperature is continuously generated in a detection period, and the scaling phenomenon is accelerated due to the high water temperature maintaining event.
When either of the mode A or the mode B judges that the condition is satisfied, or when both of the two satisfy the condition,
step S12: the blowdown value is incremented by one.
The time when the sewage discharge value leaves the factory is set to be 0, after the sewage discharge value reaches the home of the user, according to the judgment of the step S12, one is added when the condition is met every time in the using process, and the counting is reset and restarted after the sewage discharge function is finished.
Here, the water temperature in the water tank is obtained by any one of the water temperature sensors installed in the water tank, that is, even if there are a plurality of water temperature sensors, the execution condition of step 12 is satisfied as long as the water temperature obtained by one water temperature sensor satisfies the determination condition.
Step S13: and judging whether the pollution discharge value is larger than a pollution discharge threshold value.
The pollution discharge threshold value such as 60, 90, etc. can be set and modified according to the local water quality condition, when the accumulated pollution discharge value reaches the pollution discharge threshold value,
step S14: and sending out pollution discharge indication information.
The heat pump water heater is provided with a blowdown indicating lamp, and the blowdown indicating lamp is lightened when the blowdown indicating information is sent out.
Step S15: and judging whether a pollution discharge confirmation signal is received or not.
Set up the blowdown button on heat pump water heater, the user is after receiving blowdown instruction information's warning, can trigger this blowdown button and send blowdown confident signal, the mode of triggering for example long presses 2 seconds, 3 seconds or clicks 2 times in succession etc. can regard as multiplexing button to use, for example this blowdown button can multiplex for the button of manual start blowdown function, when the user clicks this blowdown button of short-term trigger, light the blowdown pilot lamp, and click this blowdown button of long-time trigger or click 2 times in succession at the user once more when this blowdown button, start the blowdown function. After the heat pump water heater receives the blowdown acknowledgement signal,
step S16: and starting the pollution discharge function according to the set time length.
The blowdown function is started at the set time length of 120 seconds, so that the heat pump water heater enters a blowdown program to blowdown, scales in the water tank can be timely cleaned, and the water quality and the heating efficiency are guaranteed.
And during the sewage discharge function, controlling the sewage discharge indicator lamp to flash according to a set rule so as to inform a user that the heat pump water heater is in the sewage discharge process, and extinguishing the sewage discharge indicator lamp after the sewage discharge is finished.
If the user does not want to execute the current sewage draining program after receiving the sewage draining indication information and does not trigger the sewage draining key to generate a sewage draining confirmation signal, the user only needs to execute the sewage draining program and execute the sewage draining program according to the sewage draining indication information
The steps are as follows: and sending out pollution discharge indication information in the next detection period after the current detection period is finished.
And in the next detection period, continuously sending out pollution discharge indication information to continuously remind the user of starting a pollution discharge program in time.
After the sewage discharge function is activated for the set time period in step S16, step S18: judging whether the sewage draining function is finished, if not, continuing to drain sewage, if not, returning to the step S17, if so,
step S19: and detecting whether the pollution discharge index is met.
If the scaling condition in the water tank is serious, and the scaling in the water tank cannot be cleared qualified after the once-set time of pollution discharge is long, a step of detecting whether a pollution discharge result meets a pollution discharge index is added after the execution of each pollution discharge function is finished, wherein the pollution discharge index is an index which reaches a preset target of pollution discharge, such as a preset index of water quality. If the detection result does not meet the pollution discharge index, the detection result needs to be detected
Step S20: and sending the pollution discharge indication information again.
And sending the pollution discharge indication information again to remind the user to trigger the pollution discharge key again to start the pollution discharge function, and performing further pollution discharge cleaning until the pollution discharge result meets the pollution discharge index.
Based on the above proposed method for controlling pollution discharge of the heat pump water heater, the present application also provides a heat pump water heater, which comprises a water tank 21, a pollution discharge module 22 installed in the water tank 21, and a water temperature sensor 23 installed in the water tank 21.
Specifically, the pollution discharge module 22 includes a pollution discharge detection unit 221, a pollution discharge value judgment unit 222 and a pollution discharge indication unit 223; the blowdown detection unit 221 is configured to, in each detection period, determine whether the water temperature in the water tank continuously decreases by a set temperature and the number of times that the time for decreasing the second set temperature is less than the set time is greater than the set number of times, and/or determine whether the water temperature in the water tank is greater than a threshold temperature; if yes, adding one to the pollution discharge value; the pollution discharge value judgment unit 222 is configured to judge whether the pollution discharge value is greater than a pollution discharge threshold value; if yes, the pollution discharge indicating unit 223 is used for sending pollution discharge indicating information; wherein the water temperature in the water tank is obtained by any one of a plurality of water temperature sensors 23.
The heat pump water heater also comprises a pollution discharge key 24; the soil exhaust module 22 further includes a soil exhaust control unit 224; the pollution discharge key 24 is used for generating a pollution discharge confirmation signal after being triggered; the blowdown control unit 224 is configured to determine whether a blowdown confirmation signal is received, and if so, start the blowdown function according to a set duration.
The pollution discharge indication unit 223 is, for example, a pollution discharge indicator lamp installed on the surface of the heat pump water heater; the pollution discharge control unit 224 is further configured to control the pollution discharge indicator lamp to be turned on when the pollution discharge value judgment unit 222 judges that the pollution discharge value is greater than the pollution discharge threshold value; during the period that the sewage discharge control unit 224 starts the sewage discharge function for a set time period, the sewage discharge indicator lamp is controlled to blink according to a set rule to prompt the user that the sewage discharge procedure is in progress.
The pollution discharge module 22 further includes a pollution discharge index detection unit 225; the blowdown index detecting unit 225 is configured to determine whether the blowdown function is completed after the blowdown control unit 224 starts the blowdown function according to a set duration, and detect whether the blowdown index is satisfied after the blowdown function is completed; if not, the pollution discharge control unit 224 is also used for controlling the pollution discharge indication unit 223 to send the pollution discharge indication information again.
The heat pump water heater's that this application provided still is connected with manual angle valve 26 on the blow off water pipe 25 for the user can manually operation finish the blowdown, has promoted the security of blowdown, has reduced the problem emergence of uncontrollable risk.
The specific blowdown control process of the heat pump water heater has been described in detail in the blowdown control method of the heat pump water heater proposed above, and is not described herein again.
In the heat pump water heater pollution discharge control method and the heat pump water heater provided by the application, in each detection period, the judgment of the times that the water temperature in the water tank continuously decreases to the set temperature and the time of decreasing 1 ℃ is less than the set time and/or the judgment of the times that the water temperature in the water tank is greater than the threshold temperature are carried out, if the judgment times is greater than the set times and/or the water temperature is greater than the threshold water temperature, the condition that the water consumption of a user causes repeated heating or the condition that the high water temperature continues and the scaling phenomenon can be caused by the conditions is judged, the pollution discharge value is increased by 1, otherwise the pollution discharge value is kept unchanged, when the judgment of a plurality of detection periods is carried out until the pollution discharge value reaches the pollution discharge threshold value, the heat pump water heater needs to discharge at least once to ensure that the scaling can be cleaned in time, the pollution discharge indication information is sent in time, so that the user can know the scaling condition of the heat pump water heater in time, compared with the prior art that the user is required to automatically start the sewage discharge function according to the set time interval, the sewage discharge control method can actively remind the user to start the sewage discharge function, timely eliminate scale, ensure the water quality and the heating efficiency of the heat pump water heater, and solve the technical problem of scale accumulation of the existing heat pump water heater.
When a user receives the pollution discharge indication information and triggers the pollution discharge key to send a pollution discharge confirmation signal to start the pollution discharge function, the pollution discharge module starts the pollution discharge function to discharge the heat pump water heater according to the set time length, the pollution discharge indication lamp flickers to prompt that the pollution discharge is in progress in the pollution discharge process, whether the pollution discharge index meets the requirement or not is detected after the pollution discharge is finished, and when the pollution discharge indication information is not met or the pollution discharge confirmation information of the user is not received after the pollution discharge indication information is sent, the pollution discharge indication information is continuously sent to prompt the user to discharge the pollution in time.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also make changes, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. The heat pump water heater pollution discharge control method is characterized by comprising the following steps:
in each of the detection periods, the detection period is set to be,
judging whether the water temperature in the water tank continuously decreases by the set temperature and whether the times that the time of every decrease of the second set temperature is less than the set time is more than the set times; if so,
adding one to the pollution discharge value, and judging whether the pollution discharge value is greater than a pollution discharge threshold value; if so,
sending out pollution discharge indication information;
the water temperature in the water tank is obtained by any water temperature sensor arranged in the water tank.
2. The heat pump water heater blowdown control method of claim 1, wherein after issuing blowdown indicating information, the method further comprises:
judging whether a pollution discharge confirmation signal is received or not; if so,
and starting the pollution discharge function according to the set time length.
3. The heat pump water heater pollution discharge control method according to claim 2, wherein the emission of the pollution discharge indication information is specifically:
lighting a pollution discharge indicator lamp;
when the blowdown function is activated for a set time period, the method further includes:
and controlling the pollution discharge indicator lamp to flash according to a set rule.
4. The heat pump water heater blowdown control method of claim 2, wherein if a blowdown confirmation signal is not received, the method further comprises:
and sending out pollution discharge indication information in the next detection period after the current detection period is finished.
5. The heat pump water heater blowdown control method of claim 2, wherein after the blowdown function is activated for a set period of time, the method further comprises:
judging whether the sewage draining function is finished, if so,
detecting whether the pollution discharge index is met; if not, the user can not select the specific application,
and sending the pollution discharge indication information again.
6. The heat pump water heater comprises a water tank, a pollution discharge module arranged in the water tank and a water temperature sensor arranged in the water tank, and is characterized in that the pollution discharge module comprises a pollution discharge detection unit, a pollution discharge value judgment unit and a pollution discharge indication unit;
the blowdown detection unit is used for judging whether the water temperature in the water tank continuously decreases to a set temperature and the number of times that the time of decreasing the second set temperature is less than the set time is greater than the set number of times or not in each detection period; if yes, adding one to the pollution discharge value;
the blowdown value judging unit is used for judging whether the blowdown value is greater than a blowdown threshold value; if so,
the pollution discharge indicating unit is used for sending pollution discharge indicating information;
wherein the water temperature in the water tank is obtained by the water temperature sensor.
7. The heat pump water heater of claim 6, further comprising a blowdown button; the pollution discharge module also comprises a pollution discharge control unit;
the blowdown key is used for generating a blowdown confirmation signal after being triggered;
and the sewage discharge control unit is used for judging whether the sewage discharge confirmation signal is received or not, and if so, starting the sewage discharge function according to set time length.
8. The heat pump water heater according to claim 7, wherein the blowdown indicating unit is a blowdown indicating lamp;
the blowdown control unit is also used for controlling the blowdown indicating lamp to be lightened when the blowdown value judging unit judges that the blowdown value is greater than the blowdown threshold value;
and when the blowdown control unit starts the blowdown function according to the set time length, the blowdown indicating lamp is controlled to flicker according to the set rule.
9. The heat pump water heater according to claim 7, wherein the blowdown module further comprises a blowdown index detection unit;
the blowdown index detection unit is used for judging whether the blowdown function is finished after the blowdown control unit starts the blowdown function according to the set time length, and detecting whether the blowdown index is met after the blowdown function is finished; if not, the user can not select the specific application,
the pollution discharge control unit is further used for controlling the pollution discharge indicating unit to send the pollution discharge indicating information again.
10. The heat pump water heater of claim 6, further comprising a waste pipe connected to the water tank, and an angle valve connected to the waste pipe.
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| CN201710851755.6A CN109520130B (en) | 2017-09-20 | 2017-09-20 | Heat pump water heater pollution discharge control method and heat pump water heater |
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| CN201710851755.6A CN109520130B (en) | 2017-09-20 | 2017-09-20 | Heat pump water heater pollution discharge control method and heat pump water heater |
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| CN110953715B (en) * | 2019-12-25 | 2022-04-22 | 青岛海尔新能源电器有限公司 | Dynamic descaling control method for heat pump hot water unit |
| CN111981696A (en) * | 2020-07-23 | 2020-11-24 | 华帝股份有限公司 | Method for detecting scale formation of heat exchanger of gas hot water supply equipment and gas hot water supply equipment |
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