Water replenishing control method suitable for commercial water heater

Abstract

According to the water replenishing control method suitable for the commercial water heater, different heating modes and reasonable water replenishing control are adopted according to the difference of actual water volume and temperature changes of a water tank, and the energy efficiency is guaranteed as far as possible while it is guaranteed that the water temperature of the water tank always meets the terminal water use condition and better use experience is brought to a user. It can be guaranteed that the water temperature in the water tank always meets the water use requirement, and the energy efficiency is high.

Description

Technical Field

[0001] The invention relates to a water replenishment control method suitable for a commercial water heater. Background Art

[0002] Air source heat pump water heaters are increasingly being used in commercial hot water applications due to their energy-saving and high-efficiency advantages. When users choose commercial water heaters, they will use them with large water tanks. Since the hot water system is a one-time system, the water volume in the water tank will gradually decrease after the terminal uses the water. For continuous use, the water tank needs to be replenished from time to time. However, since cold water is used for replenishment, once the replenishment control is unreasonable, the water temperature in the water tank will drop sharply, which will not meet the terminal water use conditions and affect the user experience. Summary of the invention

[0003] In view of the above problems, the present invention provides a water replenishment control method applicable to a commercial water heater, which effectively solves the problems pointed out in the background technology.

[0004] The technical solution adopted by the present invention is:

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

[0006] 1) When S is detected 水 ≥S 高 And when it lasts for 30s or Tbox≤Tset-b, the water supply solenoid valve is controlled to close and water supply is stopped;

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

[0008] 3) When S is detected 水 高 And when it lasts for 10 minutes, control it according to the following method:

[0009] 31) If Tbox>Tset-a, the water supply solenoid valve is controlled to open for water supply;

[0010] 32) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox≤3, the water supply solenoid valve is controlled to open to supply water, and the water heater works in energy-saving mode;

[0011] 33) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox>3, the water supply solenoid valve is controlled to open to supply water, and the water heater works in the rapid heating mode;

[0012] ​34) If Tbox≤Tset-b, the water supply solenoid valve is controlled to close, and the water heater operates in the rapid heating mode;

[0013] 4) When S is detected 水 中 And when it lasts for 10 minutes, control it according to the following method:

[0014] 41) If Tbox>Tset-a, the water supply solenoid valve is controlled to open for water supply;

[0015] 42) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox≤0, the water supply solenoid valve is controlled to open to supply water, and the water heater works in energy-saving mode;

[0016] 43) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox>0, the water supply solenoid valve is controlled to open to supply water, and the water heater works in the rapid heating mode;

[0017] 44) If Tbox≤Tset-b, the water supply solenoid valve is controlled to be closed, and the water heater operates in the rapid heating mode;

[0018] 5) When S is detected 水 低 After 10 seconds, the water supply solenoid valve is controlled to remain open, the water supply solenoid valve is closed, and the water heater operates in the rapid heating mode until S 水 ≥S 中 And after Tbox>Tset-a, the water solenoid valve is opened again and the water side is restored to use;

[0019] Among them, S 水 is the actual water level of the water tank of the water heater, S 高 , S 中 , S 低 They are high, medium and low positions of the water tank of the water heater, Tbox is the actual water temperature in the water tank of the water heater, Tset is the set water temperature of the water heater, and Tbox n is the actual water temperature in the water tank of the water heater before time n, a, b, n are constants, and a <b。

[0020] Preferably, the water supply solenoid valve is arranged on the water supply pipe group of the water heater to control the on and off of water supply, and the water supply solenoid valve is arranged on the water supply pipe group of the water heater to control the on and off of water supply.

[0021] Preferably, three water level gauges are provided 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 .

[0022] Preferably, a temperature sensor is provided in the water tank of the water heater for monitoring the actual water temperature Tbox in the water tank.

[0023] At the same time, the present invention also provides a commercial water heater, including a heat pump unit and a water tank, the water tank is provided with a water supply pipe group and a water pipe group, the water supply pipe group is provided with a water supply solenoid valve, the water pipe group is provided with a water supply solenoid valve, and three water level gauges are provided in the water tank from bottom to top, namely a first water level gauge, a second water level gauge and a third water level gauge, which correspond to the low water level S in the water tank respectively. 低 , medium water level S 中 and high water level S 高 , which makes it convenient for the heat pump unit to monitor the water level range in the water tank. A temperature sensor is set in the water tank, near the water outlet of the water tank, to detect the actual water temperature Tbox in the water tank.

[0024] The present invention adopts different heating modes and reasonable water replenishment control according to the actual water volume and temperature changes in the water tank, ensuring that the water temperature in the water tank always meets the terminal water use conditions, bringing users a better use experience while ensuring energy efficiency as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the water heater of the present invention. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

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

[0028] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0033] Example 1

[0034] like Figure 1As shown, the present invention provides a commercial water heater, including a heat pump unit 1 and a water tank 2. The water tank 2 is provided with a water supply pipe group 3 and a water pipe group 4. The water supply pipe group 3 is provided with a water supply solenoid valve 5. The water pipe group 4 is provided with a water supply solenoid valve 6. Three water level gauges are provided in the water tank 2 from bottom to top, namely a first water level gauge 7, a second water level gauge 8 and a third water level gauge 9, which correspond to the low water level S in the water tank 2 respectively. 低 , medium water level S 中 and high water level S 高 , which is convenient for the heat pump unit to monitor the water level range in the water tank. A temperature sensor 10 is arranged in the water tank 2, which is located near the water outlet of the water tank 2 and is used to detect the actual water temperature Tbox in the water tank. For the water heater, the present invention provides a water replenishment control method suitable for commercial water heaters, and the control method is as follows:

[0035] 1) When S is detected 水 ≥S 高 And when it lasts for 30s or Tbox≤Tset-b, the water supply solenoid valve is controlled to close and water supply is stopped;

[0036] 2) When it is detected that Tbox≤Tset-a, the water heater starts to heat until Tbox≥Tset and then stops working;

[0037] When the water level in the water tank drops after using side water, it is controlled in the following way:

[0038] 3) When S is detected 水 高 And when it lasts for 10 minutes, control it according to the following method:

[0039] 31) If Tbox>Tset-a, the water supply solenoid valve is controlled to open for water supply;

[0040] 32) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox≤3, the water supply solenoid valve is controlled to open to supply water, and the water heater works in energy-saving mode;

[0041] 33) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox>3, the water supply solenoid valve is controlled to open to supply water, and the water heater works in the rapid heating mode;

[0042] 34) If Tbox≤Tset-b, the water supply solenoid valve is controlled to close, and the water heater operates in the rapid heating mode;

[0043] 4) When S is detected 水 中 ​​And when it lasts for 10 minutes, control it according to the following method:

[0044] 41) If Tbox>Tset-a, the water supply solenoid valve is controlled to open for water supply;

[0045] 42) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox≤0, the water supply solenoid valve is controlled to open to supply water, and the water heater works in energy-saving mode;

[0046] 43) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox>0, the water supply solenoid valve is controlled to open to supply water, and the water heater works in the rapid heating mode;

[0047] 44) If Tbox≤Tset-b, the water supply solenoid valve is controlled to be closed, and the water heater operates in the rapid heating mode;

[0048] 5) When S is detected 水 低 After 10 seconds, the water supply solenoid valve is controlled to remain open, the water supply solenoid valve is closed, and the water heater operates in the rapid heating mode until S 水 ≥S 中 And after Tbox>Tset-a, the water solenoid valve is opened again and the water side is restored to use;

[0049] Among them, S 水 is the actual water level of the water tank of the water heater, S 高 , S 中 , S 低 They are high, medium and low positions of the water tank of the water heater, Tbox is the actual water temperature in the water tank of the water heater, Tset is the set water temperature of the water heater, and Tbox n is the actual water temperature in the water tank of the water heater before time n, a, b, n are constants, and a <b。

[0050] The water supply solenoid valve is arranged on the water supply pipe group of the water heater to control the on and off of water supply, and the water supply solenoid valve is arranged on the water supply pipe group of the water heater to control the on and off of water supply.

[0051] Three water level gauges 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] ​A temperature sensor is provided in the water tank of the water heater to monitor the actual water temperature Tbox in the water tank.

[0053] The hot water machine of the present invention adopts a variable frequency compressor. In energy-saving mode, the compressor operates at an optimal frequency to save energy; in rapid heating mode, the compressor operates at a high frequency to heat rapidly.

[0054] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A water replenishment control method suitable for a commercial water heater, characterized in that: The control method is as follows: 1) When S is detected 水 ≥S 高 And when it lasts for 30s or Tbox≤Tset-b, the water supply solenoid valve is controlled to close and water supply is stopped; 2) When it is detected that Tbox≤Tset-a, the water heater starts to heat until Tbox≥Tset and then stops working; 3) When S is detected 水 高 And when it lasts for 10 minutes, control it according to the following method:​ 31) If Tbox>Tset-a, the water supply solenoid valve is controlled to open for water supply; 32) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox≤3, the water supply solenoid valve is controlled to open to supply water, and the water heater works in energy-saving mode; 33) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox>3, the water supply solenoid valve is controlled to open to supply water, and the water heater works in the rapid heating mode; 34) If Tbox≤Tset-b, the water supply solenoid valve is controlled to close, and the water heater operates in the rapid heating mode; 4) When S is detected 水 中 And when it lasts for 10 minutes, control it according to the following method:​ 41) If Tbox>Tset-a, the water supply solenoid valve is controlled to open for water supply; 42) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox≤0, the water supply solenoid valve is controlled to open to supply water, and the water heater works in energy-saving mode; 43) If Tset-b<Tbox≤Tset-a, and Tbox n -Tbox>0, the water supply solenoid valve is controlled to open to supply water, and the water heater works in the rapid heating mode; 44) If Tbox≤Tset-b, the water supply solenoid valve is controlled to be closed, and the water heater operates in the rapid heating mode; 5) When S is detected 水 低 After 10 seconds, the water supply solenoid valve is controlled to remain open, the water supply solenoid valve is closed, and the water heater operates in the rapid heating mode until S 水 ≥S 中 And after Tbox>Tset-a, the water solenoid valve is opened again and the water side is restored to use;​ Among them, S 水 is the actual water level of the water tank of the water heater, S 高 , S 中 , S 低 They are high, medium and low positions of the water tank of the water heater, Tbox is the actual water temperature in the water tank of the water heater, Tset is the set water temperature of the water heater, and Tbox n is the actual water temperature in the water tank of the water heater before time n, a, b, n are constants, and a <b。 2. A water replenishment control method suitable for a commercial water heater according to claim 1, characterized in that: The water supply solenoid valve is arranged on the water supply pipe group of the water heater to control the on and off of water supply, and the water supply solenoid valve is arranged on the water supply pipe group of the water heater to control the on and off of water supply.

3. A water replenishment control method suitable for a commercial water heater according to claim 1, characterized in that: Three water level gauges 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 .

4. A water replenishment control method suitable for a commercial water heater according to claim 1, characterized in that: A temperature sensor is provided in the water tank of the water heater to monitor the actual water temperature Tbox in the water tank.

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