CN111238037A - Hot water unit - Google Patents
Hot water unit Download PDFInfo
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- CN111238037A CN111238037A CN202010104692.XA CN202010104692A CN111238037A CN 111238037 A CN111238037 A CN 111238037A CN 202010104692 A CN202010104692 A CN 202010104692A CN 111238037 A CN111238037 A CN 111238037A
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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
- F24H4/04—Storage heaters
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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
Abstract
The invention discloses a hot water unit which comprises a heat pump water heater, a water tank, a hot water circulating pump, an environment temperature sensor, a recommended water temperature generation module and a water tank temperature control module, wherein the heat pump water heater is connected with the water tank; the recommended water temperature generation module is used for determining a reference environment temperature value within a set time length, so that the environment temperatures exceeding the threshold time length within the set time length are all larger than the reference environment temperature value; and generating a recommended water temperature based on the reference ambient temperature value; the water tank temperature control module is used for selecting a low value of the recommended water temperature and the water temperature set by the user as a target water temperature to adjust the water temperature of the water tank. When a user forgets to adjust the water temperature according to seasonal changes, the target water temperature in the proper season is automatically generated to adjust the water temperature in the water tank, and the technical effects of reducing unit energy consumption and improving unit energy efficiency are achieved.
Description
Technical Field
The invention relates to the technical field of commercial air conditioners, in particular to a hot water unit.
Background
The water temperature of the commercial hot water unit is usually set within 30-60 ℃ and can be adjusted, and the water temperature of the unit is controlled according to the actual set temperature of a user.
For example, if the water temperature is lower than the set temperature-the startup deviation temperature a, the heat pump unit is started, and the heat pump unit is turned off until the water tank temperature is equal to the set temperature + the shutdown deviation temperature B; if the user sets that the temperature is 55 ℃, the starting deviation temperature A is 5 ℃ and the stopping deviation temperature B is 3 ℃, the heat pump unit is started when the water temperature is lower than 50 ℃ until the water temperature reaches 58 ℃ and the machine is stopped.
Under different climatic conditions, the actual water temperature of users is inevitably different, the water temperature needed in winter is high, and the water temperature needed in summer is low; the actual setting of the user is mostly set according to the water temperature required in winter, and the user easily forgets to readjust the water temperature in summer, so that the set water temperature is still high in summer, which inevitably causes the problems of high energy consumption and low unit energy efficiency.
Disclosure of Invention
In order to solve the problems of the existing water heating unit, the invention provides the water heating unit, the recommended water temperature is generated according to the ambient temperature, the low temperature is selected between the recommended water temperature and the water temperature set by a user to adjust the water temperature in the water tank, and when the user forgets to adjust the water temperature according to seasonal changes, the target water temperature suitable for seasons is automatically generated to adjust the water temperature in the water tank, so that the technical effects of reducing the energy consumption of the unit and improving the energy efficiency of the unit are achieved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a water heater unit, comprising: a heat pump water heater; the water tank is connected with the heat pump water heater; the hot water circulating pump is connected between the heat pump water heater and the water tank and used for pumping water in the water tank to the heat pump water heater for heating; the water heated by the heat pump water heater is discharged back to the water tank; the environment temperature sensor is used for detecting the environment temperature of the hot water unit; further comprising: the recommended water temperature generation module is used for determining a reference environment temperature value within a set time length, so that the environment temperatures exceeding the threshold time length within the set time length are all larger than the reference environment temperature value; and generating a recommended water temperature based on the reference ambient temperature value; and the water tank temperature control module is used for selecting the low value of the recommended water temperature and the water temperature set by the user as a target water temperature to adjust the water temperature of the water tank.
Compared with the prior art, the technical scheme of the invention has the following technical effects: according to the hot water unit, the environment temperature sensor detects the environment temperature of the hot water unit, the recommended water temperature generation module determines a reference environment temperature value according to the condition that the environment temperature exceeding the threshold time is greater than the reference environment temperature value within the set time, the recommended water temperature is generated according to the reference environment temperature value, the water tank temperature control module selects the low value of the recommended water temperature and the water temperature set by the user as the target water temperature to adjust the water temperature of the water tank, and when the user forgets to adjust the water temperature according to seasonal changes, the target water temperature suitable for seasons can be automatically generated to adjust the water tank temperature based on the hot water unit, so that the technical effects of reducing the energy consumption of the unit and improving the energy efficiency of the unit are achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hot water unit according to the present invention;
FIG. 2 is a schematic diagram of a functional architecture of a hot water unit according to the present invention;
FIG. 3 is a schematic flow chart illustrating a process of adjusting a water temperature in a water tank of a hot water unit according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a process of adjusting a water temperature in a water tank of a hot water unit according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of a functional architecture of a hot water unit according to a third embodiment of the present invention;
fig. 6 is a schematic diagram of a functional architecture of a hot water unit according to a fifth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a water tank in a water heater unit according to a fifth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a hot water unit, as shown in fig. 1, comprising a heat pump water heater 1, a water tank 2, a hot water circulating pump 3 and an ambient temperature sensor 4; wherein water tank 2 links to each other through the pipeline with heat pump water heater 1, and hot water circulating pump 3 is connected between heat pump water heater 1 and water tank 2, and hot water circulating pump 3 extracts the water in the water tank 2 and heats to heat pump water heater 1, and the water after 1 heats of heat pump water heater discharges back to water tank 2.
The invention aims to provide a water temperature adjusting mode of a water tank on the basis of the structure of the hot water unit shown in the figure 1, so that the heating water temperature can be automatically adjusted according to seasonal changes, user adjustment is not needed, and the unit can be ensured to operate at the optimal energy efficiency.
Specifically, as shown in fig. 2, the hot water unit further includes an ambient temperature sensor 4 for detecting an ambient temperature of the hot water unit, a recommended water temperature generating module 5, and a water tank temperature control module 6; the recommended water temperature generation module 5 is configured to determine a reference ambient temperature value THC within a set time period t1, so that the ambient temperatures exceeding the threshold time period t2 within the set time period t1 are all greater than the reference ambient temperature value THC, and t1> t 2; generating a recommended water temperature TW according to the reference environment temperature value THC; the water tank temperature control module 6 selects a low value of the recommended water temperature TW and the user set water temperature TS as a target water temperature to adjust the water tank temperature, where the user set water temperature TS is the water temperature set by the user.
The present invention seeks a reference ambient temperature THC for a set duration t1 to ensure that the ambient temperature exceeding the threshold duration t2 for the set duration t1 is greater than the reference ambient temperature value THC, deducing the ambient temperature situation from the reference ambient temperature value THC and generating a recommended water temperature TW based on this value, if the user has set a user set water temperature, a low value is selected as the target water temperature between the recommended water temperature and the user-set water temperature, for example, when the user sets the user-set water temperature to 55 deg.c in winter, when the season is warm and the user forgets to reset the water temperature, according to the water heating unit, a recommended water temperature of 45 ℃ is generated according to the steps, and then the recommended water temperature of 45 ℃ with a low value is selected as a target water temperature of water stored in the water tank, so that the phenomenon that the heat quantity is increased due to overhigh water temperature and the energy consumption of the unit is increased inevitably is avoided, and the energy efficiency of the unit is reduced.
Assuming that the water storage capacity of the water tank is 1000L, in an initial state, a user sets the water temperature to be 55 degrees, the water temperature of tap water in winter is 10 degrees, and the water for washing in winter is 42 degrees, x =406 is obtained according to 1000 x 55+ x 42, that is, the available water volume of the user after water mixing is 1406L; when summer begins, the water temperature of the water tank is adjusted according to the target water temperature of 45 ℃, the water temperature of about 20 ℃ in summer and the washing water of about 38 ℃ in summer, and x =389 is obtained according to 1000 x 45+ x 38, namely the available water volume of a user after water mixing is 1389L; therefore, the water tank has similar total water volume under two conditions, so that the water use sufficiency of users in different seasons is ensured, the temperature of the water tank is reduced as much as possible, the heat dissipation capacity of the water tank is reduced, the operation energy efficiency of the whole machine is improved, and the purpose of saving energy is achieved.
The hot water unit according to the invention is described below in two embodiments.
Example one
In this embodiment, if the given set time duration is 120 hours (5 days), and the threshold time duration is 20 hours, after the hot water unit starts the recommended water temperature generating module, the following steps are executed with 120 hours as a cycle, as shown in fig. 3:
step S31: and continuously receiving and recording the detection data of the ambient temperature sensor within a set time length.
The recorded content includes detection data and a corresponding detection time.
Step S32: and after the set time length is finished, counting the total time length corresponding to the same detection data.
That is, the durations corresponding to the same detected temperatures are added to obtain a total duration, for example, within 120 hours, the detected ambient temperature is 10 hours accumulated for a total duration corresponding to 5 °, 10 hours accumulated for a total duration corresponding to 6 °, 10 hours accumulated for a total duration corresponding to 7 °, 10 hours accumulated for a total duration corresponding to 8 °, 10 hours accumulated for a total duration corresponding to 9 °, 16 hours accumulated for a total duration corresponding to 10 °, 26 hours accumulated for a total duration corresponding to 11 °, and 28 hours accumulated for a total duration corresponding to 12 °.
Step S33: and determining the detection data with the total time length exceeding the threshold time length as the pre-reference environment temperature value.
In the data, the detection data with the total time length exceeding the threshold time length by 20 hours are respectively 11 ° C and 12 ° C, and then the pre-reference environment temperature values are screened out to be 11 ° C and 12 ° C.
Step S34: the maximum pre-reference ambient temperature value is selected as the reference ambient temperature value.
The pre-reference ambient temperature value of 12 ℃ is selected as the reference ambient temperature value THC.
Step S35: and generating a recommended water temperature according to the reference environment temperature value.
For example, the recommended water temperature is 50 ℃ corresponding to an ambient temperature of 12 ℃.
Step S36: and selecting the low value of the recommended water temperature and the water temperature set by the user as the target water temperature to adjust the water temperature of the water tank.
Assuming that the water temperature set by a user is 55 degrees, selecting the recommended water temperature of 50 degrees as a target water temperature to adjust the water temperature of the water tank; and if the water temperature set by the user is 45 ℃, selecting.
The user sets the water temperature of 45 ℃ as the target water temperature to adjust the water temperature of the water tank.
Example two
In this embodiment, based on the first embodiment, the threshold duration is located for 30 hours, and other parameters and execution steps are the same as those in the first embodiment.
When it is known from the step S32 that the total time length corresponding to all the detection data is less than the threshold time length by 30 hours, as shown in fig. 4, the following steps are performed without performing the steps S33 and S34:
step S37: and accumulating the corresponding total time length in the sequence of the detection data from large to small until the total time length is greater than the threshold time length.
According to the detection data of the first embodiment, the total duration is accumulated in the order from big to small, and the total duration accumulated at 12 ℃ and 11 ℃ is as follows: 24+28=52 hours, if the total duration is longer than the threshold duration by 30 hours, stopping the accumulation of the total duration, if the total duration corresponding to the maximum detection data and the second-largest detection data is still shorter than the threshold duration, continuing to accumulate the duration corresponding to the third-largest detection data downwards to obtain a new total duration, and continuing to judge whether the total duration is longer than the threshold duration, and repeating the steps until the total accumulated duration is longer than the threshold duration.
Step S38: and taking the minimum detection data in the detection data accumulated to obtain the total time as a reference environment temperature value.
And taking the minimum detection data 11 ℃ of the detection data 11 ℃ and 12 ℃ which are accumulated to obtain the total time length as a reference environment temperature value.
Then, in the same way as the first embodiment, steps S35 to S36 are executed, the recommended water temperature of 50 ℃ is generated according to the reference environment temperature value of 11 ℃, and the low value of the recommended water temperature and the user set water temperature is selected as the target water temperature to adjust the water temperature of the water tank.
EXAMPLE III
In this embodiment, on the basis of the first embodiment and the second embodiment, as shown in fig. 5, the hot water unit further includes a line controller 7 connected to the recommended water temperature generating module 5, and configured to generate an energy saving instruction after receiving the trigger signal, where the energy saving instruction is used to start the recommended water temperature generating module 5 to operate, and correspondingly, the recommended water temperature generating module 5 includes a starting unit 51, and after receiving the energy saving instruction, the starting unit 51 starts the recommended water temperature generating module 5 according to a set period to recommend the water temperature according to the manner in the first embodiment or the second embodiment.
The line controller 7 comprises a key, a touch screen and other mechanisms for setting and/or sending an energy-saving instruction after being triggered by a user, and when the user triggers and sets and/or starts the key or the touch screen to send the energy-saving instruction, the starting unit 51 of the recommended water temperature generating module 5 receives the energy-saving instruction, and starts the recommended water temperature generating module 5 by taking 24 hours as a set period; after the activation of each set period, the recommended water temperature generation module 5 generates the recommended water temperature in accordance with steps S31 to S35 and steps S37 and S38.
Example four
In this embodiment, a set ambient temperature value THS is preset, and an optimal recommended water temperature TWZ is set corresponding to the set ambient temperature value THS; and setting an execution condition: and when the reference environment temperature value is greater than or equal to the set environment temperature value, generating a recommended water temperature according to the set environment temperature value.
For example, the set environment temperature value THS is set to 10 °, and the optimal recommended water temperature TWZ is set to 50 ° corresponding to the set environment temperature value THS, when the reference environment temperature value obtained according to the first embodiment is 12 °, according to the setting condition of the embodiment, the reference environment temperature value is greater than the set environment temperature value, and then the step S36 is executed according to the optimal recommended water temperature TWZ corresponding to the set environment temperature value THS; when the reference environment temperature value obtained according to the second embodiment is 11 degrees, according to the setting condition of this embodiment as well, the reference environment temperature value THC is greater than the set environment temperature value THS, and the step S36 is executed according to the optimal recommended water temperature TWZ corresponding to the set environment temperature value THS.
In this embodiment, the set ambient temperature value may be composed of a plurality of temperature nodes, and as shown in table one below, the recommended water temperature generation module 5 generates the recommended water temperature according to the maximum temperature node at which the reference ambient temperature value THC is greater than or equal to; specifically, referring to the first table, as described above, when the reference environment temperature value is 11 ° C or 12 °, the recommended water temperature generating module 5 generates the recommended water temperature of 50 ° according to the maximum temperature node 10 ° C of which the reference environment temperature value is greater than or equal to (where the reference environment temperature value is greater than the temperature nodes, and the temperature nodes are 0 ° C and 10 ° C).
If the reference environment temperature value is 9 ℃, the recommended water temperature generating module 5 generates a recommended water temperature of 52 ℃ according to the maximum temperature node of which the temperature is greater than or equal to 0 ℃; if the reference environment temperature value is 24 ℃, the recommended water temperature generating module 5 generates the recommended water temperature of 48 ℃ according to the maximum temperature node of 20 ℃ which is greater than or equal to the recommended water temperature.
Watch 1
| Setting environment temperature value (o C) | Recommended water temperature (o C) |
| 30 | 45 |
| 20 | 48 |
| 10 | 50 |
| 0 | 52 |
| Others | 55 |
EXAMPLE five
In the prior art, a water tank is generally provided with a two-gear float switch for detecting a low water level and a high water level, water is supplemented when the water level in the water tank reaches the low water level, and water is supplemented when the water level reaches the high water level, so that the water tank can be kept in the high water level state for a long time by the water supplementing mode, and the hot water storage capacity is improved; however, in practical application, under the condition of high temperature such as summer, the high-water-level stored hot water can increase heat dissipation instead to reduce the energy efficiency of the unit, and for the problem, the four-gear float switch is adopted in the embodiment to set four water levels such as a low water level, a medium water level and a high water level, so that the unit can select different water volume modes according to the conditions such as time, use habits, regions or user accommodation rates, and the problem that the energy efficiency of the unit is reduced due to heat dissipation caused by high-water-level stored water is solved.
Specifically, in this embodiment, the water heater unit further includes a water replenishing pipeline 9 and a water level switch: a low water level switch 81, a middle water level switch 82, a middle water level switch 83 and a high water level switch 84, which are sequentially installed at a low water level line, a middle water level line and a high water level line in the water tank 2 from bottom to top, as shown in fig. 7, and a water replenishing pipeline 9 is connected with the water tank 2, as shown in fig. 1; as shown in fig. 6, the water heater unit further includes a water quantity mode setting module 10 and a pipeline 9, wherein the water quantity mode setting module 10 is configured to set a water quantity mode, and the water supplementing module 11 controls the water supplementing pipeline 9 to start water supplementing according to the setting of the water quantity mode.
The water quantity mode comprises a standard water quantity mode, a low water quantity mode, a medium water quantity mode and a high water quantity mode; wherein, the standard water quantity mode is set as follows: when the water level is lower than the low water level, water is supplemented until the water level reaches the high water level, and then the water is stopped; setting a low water volume mode: when the water level is lower than the low water level, supplementing water until the water level reaches a middle water level, and stopping supplementing water; setting the water quantity mode: when the water level is lower than the medium water level, water is supplemented until the water level reaches the medium water level; setting a high water volume mode: and when the water level is lower than the middle and high water levels, water is supplemented until the water level reaches the high water level, and the water is stopped.
The water quantity mode setting module 10, for example, a keyboard, a touch screen, etc. provided on the line controller 7, generates a control instruction for selecting different water quantity modes based on the selection of the user; and different water quantity icons are displayed on the display module, so that a user can clearly know the water quantity mode to be set or the water quantity mode currently running.
When a user selects (can be set on the line controller 7) a low water volume according to an actual application condition (for example, in a time period when the occupancy rate of the user is low or the water consumption is minimum), the water volume mode setting module 10 sets the water volume mode to a low water volume mode, the water supplementing module 11 controls the water supplementing pipeline 9 to start and then supplement water based on the setting of the low water volume mode when the water level switch detects that the water level of the water tank 2 is lower than the low water volume, and the water supplementing pipeline stops until the water level reaches a middle water level, so that the user is ensured to have enough water consumption in the low water volume mode, and the energy consumption of the unit is avoided, thereby improving the whole.
When a user selects a high water volume according to an actual application condition (for example, a time period with the largest water consumption), the water volume mode setting module 10 sets the water volume mode to the high water volume mode, and the water supplementing module 11 controls the water supplementing pipeline 9 to start supplementing water when the water level of the water tank is detected to be lower than the middle-high water level according to the water level switch based on the setting of the high water volume mode, and stops the water supplementing until the water level reaches the high water level, so that the maximum water volume and the best comfort which can be applied by the user are ensured.
In this embodiment, the water heating unit may be designed with the water quantity mode recommending module 12, and recommend the water quantity mode to the water quantity mode setting module 10 in the existing statistical or self-learning manner according to the conditions such as time, user habits, regional characteristics, or user lodging rate, so as to omit the operation of the user to set the water quantity mode by himself.
According to the embodiment, the water heating unit provided by the invention can automatically generate the target water temperature according to the environment temperature to adjust the water temperature of the water tank, can work in different water quantity modes according to different application conditions, and can achieve the optimal energy efficiency of the whole machine by combining water temperature control and water quantity control.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A water heating unit comprising:
a heat pump water heater;
the water tank is connected with the heat pump water heater;
the hot water circulating pump is connected between the heat pump water heater and the water tank and used for pumping water in the water tank to the heat pump water heater for heating; the water heated by the heat pump water heater is discharged back to the water tank;
the environment temperature sensor is used for detecting the environment temperature of the hot water unit;
it is characterized by also comprising:
the recommended water temperature generation module is used for determining a reference environment temperature value within a set time length, so that the environment temperatures exceeding the threshold time length within the set time length are all larger than the reference environment temperature value; and generating a recommended water temperature based on the reference ambient temperature value;
and the water tank temperature control module is used for selecting the low value of the recommended water temperature and the water temperature set by the user as a target water temperature to adjust the water temperature of the water tank.
2. The water heater unit according to claim 1, wherein the recommended water temperature generation module generates the recommended water temperature based on the reference ambient temperature value, and specifically includes:
and when the reference environment temperature value is greater than or equal to a set environment temperature value, generating a recommended water temperature according to the set environment temperature value.
3. The water heating unit according to claim 1, wherein the recommended water temperature generation module is specifically configured to:
receiving and recording detection data of the ambient temperature sensor within a set time length;
after the set time length is over, counting the total time length corresponding to the same detection data, and determining the detection data with the total time length exceeding the threshold time length as a pre-reference environment temperature value; selecting a maximum pre-reference ambient temperature value as the reference ambient temperature value.
4. The water heating unit as claimed in claim 3, wherein the recommended water temperature generation module is further configured to:
when the total duration is smaller than the threshold duration, accumulating the corresponding total durations in the sequence of the detection data from big to small until the total duration is larger than the threshold duration;
and taking the minimum detection data in the detection data of the total duration obtained through accumulation as the reference environment temperature value.
5. The water heating unit according to claim 2,
the set environmental temperature value is composed of a plurality of temperature nodes, and the recommended water temperature generation module generates the recommended water temperature according to the maximum temperature node with the reference environmental temperature value being greater than or equal to the maximum temperature node.
6. The water heating unit as claimed in claim 1, wherein the recommended water temperature generating module comprises:
and the starting unit is used for starting the recommended water temperature generating module according to a set period.
7. The hot water unit as claimed in claim 1, further comprising:
the water level switch comprises a low water level switch, a middle and high water level switch and is sequentially arranged at a low water level line, a middle and high water level line and a high water level line in the water tank from bottom to top;
the water replenishing pipeline is connected to the water tank;
the water quantity mode setting module is used for setting a water quantity mode; the water quantity mode comprises a standard water quantity mode, a low water quantity mode, a medium water quantity mode and a high water quantity mode;
the water replenishing module is used for controlling the water replenishing pipeline to start water replenishing based on the setting of the water quantity mode;
the water is supplemented when the standard water quantity mode is set to be lower than the low water level until the water level reaches the high water level, and then the water is stopped; the low water quantity mode is set to be lower than the low water level, and water is supplemented until the water level reaches the middle water level; when the water amount mode is set to be lower than the medium water amount, water is supplemented until the water level reaches the medium water level, and the water is stopped; and when the high water volume mode is set to be lower than the middle and high water levels, water is supplemented until the water level reaches the high water level, and then the water supplementing is stopped.
8. The hot water unit as claimed in claim 7, further comprising:
and the water quantity mode recommending module is used for recommending the water quantity mode to the water quantity mode setting module according to the conditions of time, use habits, regions or user accommodation rate.
9. The hot water unit as claimed in claim 7, further comprising:
the wire controller is connected with the recommended water temperature generating module and used for generating an energy-saving instruction after receiving a trigger signal; the energy-saving instruction is used for starting the recommended water temperature generating module.
10. The water heating assembly of claim 9, wherein the line controller comprises:
and the display module is used for displaying the water quantity mode identification.
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| CN202010104692.XA CN111238037A (en) | 2020-02-20 | 2020-02-20 | Hot water unit |
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| CN202010104692.XA CN111238037A (en) | 2020-02-20 | 2020-02-20 | Hot water unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112188170A (en) * | 2020-09-30 | 2021-01-05 | 重庆市海普软件产业有限公司 | Outdoor intelligent digital holder control system and method |
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