A water replenishment control method suitable for a commercial water heater

Abstract

The application discloses a water replenishing control method suitable for a commercial water heater. According to different actual water tank water quantity and temperature changes, different heating modes and reasonable water replenishing control are adopted, so that the water tank water temperature always meets terminal water use conditions, better use experience is brought to users, and energy efficiency is ensured as much as possible. The application can not only ensure that the water temperature in the water tank always meets water use requirements, but also has high energy efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a water replenishment control method for a commercial water heater. BACKGROUND

[0002] Air source heat pump water heaters are increasingly used in commercial water heating applications due to their energy-saving and efficient advantages. When selecting a commercial water heater, users will always use a large water tank. Since the water heating system is a one-time system, the water quantity in the water tank will gradually decrease after terminal water use. In order to ensure continuous use, the water tank needs to be replenished at irregular intervals. However, since the replenishment uses cold water, if the replenishment control is not reasonable, the water temperature in the water tank will decrease sharply, which does not meet the terminal water use conditions and affects the user experience. SUMMARY

[0003] To solve the above problems, the present application provides a water replenishment control method for a commercial water heater, which effectively solves the problems pointed out in the background art.

[0004] The technical scheme adopted by the present application is as follows:

[0005] A water replenishment control method for a commercial water heater, the control method is as follows:

[0006] 1) When S 水 ≥ S 高 and lasts for 30s or Tbox≤Tset-b, control the water replenishment electromagnetic valve to close and stop water replenishment;

[0007] 2) When Tbox≤Tset-a is detected, the water heater starts to work and heat until Tbox≥Tset and stops working;

[0008] 3) When S 水 <S 高 and lasts for 10min, the control is performed according to the following method:

[0009] 31) If Tbox>Tset-a, control the water replenishment electromagnetic valve to open and replenish water;

[0010] 32) If Tset-b n -Tbox≤3, control the water replenishment electromagnetic valve to open and replenish water, and the water heater works in energy-saving mode;

[0011] 33) If Tset-b n -Tbox>3, control the water replenishment electromagnetic valve to open and replenish water, and the water heater works in fast heating mode;

[0012] 34) If Tbox≤Tset-b, control the water replenishing electromagnetic valve to close, and the water heater works in the fast heating mode;

[0013] 4) When S 水 <S 中 and lasts for 10 minutes, the control is performed according to the following method:

[0014] 41) If Tbox>Tset-a, control the water replenishing electromagnetic valve to open, and water replenishing is performed;

[0015] 42) If Tset-b n -Tbox≤0, control the water replenishing electromagnetic valve to open, and water replenishing is performed, and the water heater works in the energy saving mode;

[0016] 43) If Tset-b n -Tbox>0, control the water replenishing electromagnetic valve to open, and water replenishing is performed, and the water heater works in the fast heating mode;

[0017] 44) If Tbox≤Tset-b, control the water replenishing electromagnetic valve to close, and the water heater works in the fast heating mode;

[0018] 5) When S 水 <S 低 and lasts for 10 seconds, control the water replenishing electromagnetic valve to keep open, and the water using electromagnetic valve is closed, and the water heater works in the fast heating mode until S 水 ≥S 中 and Tbox>Tset-a, the water using electromagnetic valve is opened again, and the water using side is restored;

[0019] wherein, S 水 is the actual water level of the water tank of the water heater, S 高 , S 中 , S 低 are high, middle and low positions in the water tank of the water heater respectively, Tbox is the actual water temperature in the water tank of the water heater, Tset is the set water temperature of the water heater, Tbox n is the actual water temperature in the water tank of the water heater at time n, a, b and n are constants, and a

[0020] Preferably, the water replenishing electromagnetic valve is arranged on the water replenishing pipe group of the water heater, and is used to control the on-off of water replenishing, and the water using electromagnetic valve is arranged on the water using pipe group of the water heater, and is used to control the on-off of water using.

[0021] Preferably, three water level meters are arranged in the water tank of the water heater, and correspond to S 高 , S中 低 高 中 低

[0022] As preferred, a temperature sensor is arranged in the water tank of the hot water machine, for monitoring the actual water temperature Tbox in the water tank.

[0023] Meanwhile, the application also provides a commercial hot water machine, comprising a heat pump unit and a water tank, a water replenishing pipe group and a water using pipe group are arranged on the water tank, a water replenishing electromagnetic valve is arranged on the water replenishing pipe group, a water using electromagnetic valve is arranged on the water using pipe group, three water level meters are arranged in the water tank from bottom to top, which are a first water level meter, a second water level meter and a third water level meter, corresponding to a low water level S 低 , a middle water level S 中 and a high water level S 高 respectively, for the heat pump unit to monitor the water level interval in the water tank, a temperature sensor is arranged in the water tank, near the water outlet of the water tank, for detecting the actual water temperature Tbox in the water tank.

[0024] According to the different actual water tank water quantity and temperature changes, the application adopts different heating modes and reasonable water replenishing control, guarantees the water temperature in the water tank to meet the terminal water using condition all the time, brings better using experience to the user, and guarantees the energy efficiency as much as possible. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Fig. 1 is a structural schematic diagram of the hot water machine of the application. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0027] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0028] ​​​​​Furthermore, in the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated thereby. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0030] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] The present application will be further described in detail below with specific examples in conjunction with the drawings.

[0033] Example 1

[0034] As Figure 1As shown, the application provides a commercial water heater, comprising a heat pump unit 1 and a water tank 2, the water tank 2 is provided with a water replenishing pipe group 3 and a water using pipe group 4, the water replenishing pipe group 3 is provided with a water replenishing electromagnetic valve 5, the water using pipe group 4 is provided with a water using electromagnetic valve 6, three water level meters are provided in the water tank 2 from bottom to top, which are a first water level meter 7, a second water level meter 8 and a third water level meter 9, corresponding to a low water level S 低 , a middle water level S 中 and a high water level S 高 in the water tank 2 respectively, which is convenient for the heat pump unit to monitor the water level interval in the water tank, a temperature sensor 10 is arranged in the water tank 2 near the water outlet of the water tank 2, which is used for detecting the actual water temperature Tbox in the water tank, for the water heater, the application provides a water replenishing control method suitable for commercial water heater, the control method is as follows:

[0035] 1), when S 水 ≥ S 高 is detected and lasts for 30s or Tbox≤Tset-b, the water replenishing electromagnetic valve is controlled to be closed and the water replenishing is stopped;

[0036] 2), when Tbox≤Tset-a is detected, the water heater is started to work for heating until Tbox≥Tset and then stops working;

[0037] When the water level in the water tank is lowered after the water is used on the use side, the control is performed in the following manner:

[0038] 3), when S 水 <S 高 is detected and lasts for 10min, the control is performed according to the following method:

[0039] 31), if Tbox>Tset-a, the water replenishing electromagnetic valve is controlled to be opened and the water replenishing is performed;

[0040] 32), if Tset-b n -Tbox≤3, the water replenishing electromagnetic valve is controlled to be opened and the water replenishing is performed, and the water heater works in an energy saving mode;

[0041] 33), if Tset-b n -Tbox>3, the water replenishing electromagnetic valve is controlled to be opened and the water replenishing is performed, and the water heater works in a fast heating mode;

[0042] 34), if Tbox≤Tset-b, the water replenishing electromagnetic valve is controlled to be closed and the water heater works in the fast heating mode;

[0043] 4), when S 水 <S 中And last for 10 min, according to the following method for control:

[0044] 41), if Tbox > Tset-a, control the water replenishment solenoid valve open, water replenishment;

[0045] 42), if Tset-b < Tbox ≤ Tset-a, and Tbox n -Tbox ≤ 0, control the water replenishment solenoid valve open, water replenishment, water heater according to energy saving mode work;

[0046] 43), if Tset-b < Tbox ≤ Tset-a, and Tbox n -Tbox > 0, control the water replenishment solenoid valve open, water replenishment, water heater according to fast heating mode work;

[0047] 44), if Tbox ≤ Tset-b, control the water replenishment solenoid valve closed, water heater according to fast heating mode work;

[0048] 5), when detecting S 水 <S 低 And last for 10 s, control the water replenishment solenoid valve open state, water solenoid valve closed, water heater with fast heating mode operation until S 水 ≥ S 中 And Tbox > Tset-a, water solenoid valve open again, restore water side use;

[0049] Wherein, S 水 For the actual water level of water heater tank, S 高 , S 中 , S 低 Respectively, the high, medium, low three position in the water heater tank, Tbox is the actual water temperature in the water heater tank, Tset is the set water temperature of water heater, Tbox n For the actual water temperature in the water heater tank before time n, a, b, n is a constant, and a < b.

[0050] The water replenishment solenoid valve is arranged on the water replenishment pipe group of the water heater, for controlling the on-off of water replenishment, the water solenoid valve is arranged on the water pipe group of the water heater, for controlling the on-off of water use.

[0051] Three water level meters are arranged in the water tank of the water heater, corresponding to S 高 , S 中 , S 低 Respectively, monitor whether the water level in the water tank is lower than S 高 , S 中 , S 低 .

[0052] The water tank of the hot water machine is provided with a temperature sensor for monitoring the actual water temperature Tbox in the water tank.

[0053] The hot water machine adopts a variable frequency compressor, and the compressor operates at an optimal frequency in the energy saving mode to save energy, and operates at a high frequency in the fast heating mode to heat quickly.

[0054] Finally, it should be noted that the above enumeration is only a specific embodiment of the present application. Obviously, the present application is not limited to the above embodiment, but can have many variations. All variations that can be directly derived or inferred from the disclosed content by those of ordinary skill in the art should be considered as falling within the scope of the present application.

Claims

1. A water replenishment control method suitable for commercial water heaters, characterized in that, The control method is as follows: 1) When S is detected 水 ≥S 高 And when the water supply continues for 30 seconds or Tbox ≤ Tset-b, the water supply solenoid valve will be closed to stop water supply; 2) When Tbox ≤ Tset - a is detected, the water heater starts working to heat water until Tbox ≥ Tset, then it stops working; 3) When S is detected 水 高 And when this continues for 10 minutes, control should be performed according to the following method:​ 31) If Tbox > Tset-a, then control the water replenishment solenoid valve to open and replenish water; 32) If Tset-b < Tbox ≤ Tset-a, and Tbox n If -Tbox≤3, the water supply solenoid valve will open to supply water, and the water heater will operate in energy-saving mode; 33) If Tset-b < Tbox ≤ Tset-a, and Tbox n If Tbox>3, the water supply solenoid valve will open to supply water, and the water heater will operate in fast heating mode. 34) If Tbox≤Tset-b, then the water supply solenoid valve is closed and the water heater operates in quick heating mode; 4) When S is detected 水 中 And when this continues for 10 minutes, control should be performed according to the following method:​ 41) If Tbox > Tset-a, then control the water replenishment solenoid valve to open and replenish water; 42) If Tset-b < Tbox ≤ Tset-a, and Tbox n If -Tbox≤0, the water supply solenoid valve will open to supply water, and the water heater will operate in energy-saving mode. 43) If Tset-b < Tbox ≤ Tset-a, and Tbox n If -Tbox>0, the water supply solenoid valve will open to supply water, and the water heater will operate in fast heating mode; 44) If Tbox≤Tset-b, then the water supply solenoid valve is closed and the water heater operates in quick heating mode; 5) When S is detected 水 低 After 10 seconds, the water supply solenoid valve remains open, while the water supply solenoid valve closes, and the water heater operates in rapid heating mode until S... 水 ≥S 中 And once Tbox > Tset-a, the water solenoid valve will be reopened to restore water supply to the water side.​ Among them, S 水 S represents the actual water level in the water tank of the hot water machine. 高 S 中 S 低 These represent the high, medium, and low water temperatures in the water tank of the water heater. Tbox represents the actual water temperature inside the tank, and Tset represents the set water temperature. n Let be the actual water temperature in the water tank of the hot water machine before time n, where a, b, and n are constants, and a <b。 2. The water replenishment control method for commercial water heaters according to claim 1, characterized in that, The water supply solenoid valve is installed on the water supply pipe assembly of the water heater to control the flow of water. The water supply solenoid valve is installed on the water supply pipe assembly of the water heater to control the flow of water.

3. The water replenishment control method for commercial water heaters according to claim 1, characterized in that, The water tank of the water heater is equipped with three water level gauges, each corresponding to S. 高 S 中 S 低 Monitor whether the water level in the water tank is lower than S. 高 S 中 S 低 .

4. The water replenishment control method for commercial water heaters according to claim 1, characterized in that, The water tank of the water heater is equipped with a temperature sensor to monitor the actual water temperature Tbox inside the tank.

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