Water supply method and device of water supply equipment and water purifier

Abstract

The invention relates to a water supply method and device for water supply equipment and a water purifier, the water supply equipment comprises a water storage tank, and the method comprises the steps that the current temperature of water in the water storage tank is obtained to serve as the first temperature; acquiring the temperature of the required water as a second temperature; acquiring the temperature of water to be injected as a third temperature; if the second temperature is smaller than the first temperature, the volume of water needing to be discharged is obtained according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank and the total volume of the water storage tank; the water at the first temperature in the water storage tank is discharged according to the volume of the water needing to be discharged; injecting water at a third temperature until the water storage tank is filled with water; wherein the temperature of the water in the water storage tank filled with the water is a second temperature. According to the method provided by the embodiment of the invention, the waste of heat is reduced, meanwhile, the waste of water resources is reduced, and the water use requirements of users on water with different temperatures can be met.

Description

Technical Field

[0001] The present invention relates to the field of small household appliances, and in particular to a water supply method and device for water supply equipment and a water purifier. Background Art

[0002] Water heaters, water dispensers, water purifiers and other water supply equipment are commonly used water supply equipment. Meeting the various needs of users is the development direction of water supply equipment.

[0003] When users use water supply equipment, the most basic demand is hot drinking water, and the further demand is "hot" drinking water of different temperatures. For example, when making tea, boiling drinking water is needed, and when you want to drink directly, 40-60 degrees drinking water is needed.

[0004] If the user needs water at 40-60 degrees or other temperatures below the boiling point, drinking water equipment without a water tank can be directly heated to the required temperature. However, existing water supply equipment, especially water supply equipment with a water purification function, requires multiple filtrations and cannot be done overnight. Therefore, water supply equipment with a water purification function is usually equipped with a water tank, and in order to meet the user's water needs, the water in the water tank is usually boiled water. If the user needs hot water below the boiling point, such as 40-degree hot water, there are usually two methods in the prior art for drinking water equipment with a water tank. One is to drain all the water in the water tank and then re-inject room temperature water to heat it to the temperature required by the user. The other is to drain high-temperature water while injecting room temperature water. Both methods will cause a large waste of water resources and energy.

[0005] It can be seen that in the prior art, there is no relatively economical method when the user needs water with a temperature lower than the water temperature in the water storage tank. Summary of the invention

[0006] In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a water supply method and device for water supply equipment and a water purifier.

[0007] In a first aspect, a water supply method of a water supply device is provided, wherein the water supply device comprises a water storage tank, and the method comprises:

[0008] Acquire the current temperature of the water in the water storage tank as the first temperature;

[0009] obtaining the temperature of the required water as the second temperature;

[0010] obtaining the temperature of the water to be injected as the third temperature;

[0011] If the second temperature is lower than the first temperature, the volume of water to be discharged is obtained according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank and the total volume of the water storage tank;

[0012] Discharging the water at the first temperature in the water storage tank according to the volume of the water to be discharged;

[0013] injecting water of a third temperature until the water storage tank is filled with water;

[0014] Wherein, the temperature of water in the water storage tank filled with water is the second temperature.

[0015] Optionally, the obtaining the volume of water to be discharged according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank, and the total volume of the water storage tank comprises:

[0016] obtaining a difference between the first temperature and the third temperature as a first difference;

[0017] obtaining a difference between the second temperature and the third temperature as a second difference;

[0018] Obtaining a first heat difference according to the first difference and the current volume of water in the water storage tank;

[0019] Obtaining a second heat difference according to the second difference and the total volume of the water storage tank;

[0020] The volume of water to be discharged is obtained according to the first heat difference, the second heat difference and the first difference.

[0021] Optionally, after injecting water at the third temperature until the water storage tank is filled with water, the method further comprises:

[0022] Generate water availability reminder;

[0023] Receive water taking command;

[0024] According to the water intake command, water at the second temperature flows out of the water supply device.

[0025] Optionally, a high water level probe is provided in the water storage tank, and obtaining the current temperature of the water in the water storage tank as the first temperature includes:

[0026] determining whether the water storage tank is full according to the high water level probe;

[0027] If the water storage tank is not full, inject water at a third temperature until the water in the water storage tank is full;

[0028] The current temperature of the water in the full-capacity water storage tank is obtained as the first temperature.

[0029] Optionally, the water supply equipment includes a water tank thermometer and a water inlet thermometer, the water tank thermometer is used to detect the temperature of water in the water tank, and the water inlet thermometer is used to detect the temperature of water injected into the water tank.

[0030] Optionally, the water supply device further includes a drain pipe and a drain valve, and the step of draining the water of the first temperature in the water storage tank according to the volume of water to be drained includes:

[0031] The drain valve is opened to drain the water of the first temperature in the water storage tank from the drain pipe according to the volume of the water to be drained.

[0032] Optionally, the water supply equipment further includes a water inlet pipe and a water inlet valve, and the injecting of water at the third temperature includes:

[0033] The water inlet valve is opened to allow the water at the third temperature to be injected into the water storage tank through the water inlet pipe.

[0034] Optionally, the water supply device further includes a water intake pipe and a water intake valve, and the step of causing the water at the second temperature to flow out of the water supply device according to the water intake command includes:

[0035] The water intake valve is opened to allow water at the second temperature to flow out from the water intake pipe.

[0036] In a second aspect, a water supply device for a water supply equipment is provided, wherein the water supply equipment comprises a water storage tank, and the device comprises:

[0037] a water storage tank thermometer, used to obtain the current temperature of the water in the water storage tank as a first temperature;

[0038] A controller, used for obtaining the temperature of the required water as a second temperature;

[0039] A water inlet thermometer, used to obtain the temperature of the water to be injected as the third temperature;

[0040] The controller is further configured to obtain the volume of water to be discharged according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank and the total volume of the water storage tank if the second temperature is lower than the first temperature;

[0041] A drain valve, used for discharging the water of the first temperature in the water storage tank according to the volume of the water to be discharged;

[0042] a water inlet valve, used for injecting water of a third temperature until the water storage tank is filled with water;

[0043] Wherein, the temperature of water in the water storage tank filled with water is the second temperature.

[0044] In a third aspect, a water purifier is provided, wherein the water purifier uses the method as described in any one of the above items.

[0045] The present invention relates to a water supply method, device and water purifier of a water supply equipment, wherein the water supply equipment includes a water storage tank, and the method includes: obtaining the current temperature of the water in the water storage tank as the first temperature; obtaining the temperature of the required water as the second temperature; obtaining the temperature of the water to be injected as the third temperature; if the second temperature is less than the first temperature, then obtaining the volume of water to be discharged according to the first temperature, the second temperature, the third temperature, the current volume of the water in the water storage tank and the total volume of the water storage tank; discharging the water of the first temperature in the water storage tank according to the volume of water to be discharged; injecting water of the third temperature until the water storage tank is filled with water; wherein the temperature of the water in the water storage tank filled with water is the second temperature. The present invention can reduce the waste of heat and water resources by the method of the embodiment of the present invention, and can also meet the user's water demand for water of different temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0048] Figure 1 The figure shows an application environment diagram of the water supply method of the water supply equipment according to the embodiment of the present invention;

[0049] Figure 2 Shown is a flow chart of a water supply method for a water supply device according to an embodiment of the present invention;

[0050] Figure 3 Shown is a structural block diagram of a water supply device of a water supply equipment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Figure 1 The figure shows the application environment of the water supply method of the water supply equipment according to the embodiment of the present invention. Figure 1 It is a schematic diagram of the structure of the water supply equipment, such as Figure 1 As shown, the water supply equipment includes a water storage tank 110, a high water level probe 120 and a low water level probe 130. The water supply equipment also includes a water intake pipe 150 and a water intake valve 151, a drain pipe 140 and a drain valve ( Figure 1 ), as well as a water inlet pipe 160 and a water inlet valve 161, and the water inlet of the water storage tank is 1601.

[0053] After the water intake valve 151 is opened, the user can take water through the water intake pipe, that is, the water in the water storage tank can flow out through the water intake pipe 150.

[0054] After the drain valve is opened, the water in the water storage tank can flow out through the drain pipe 140. In addition, if the water supply equipment is a water purifier or other equipment that can purify water, during the water purification process, waste water also flows out from the drain pipe 140 under the control of the drain valve.

[0055] After the water inlet valve 161 is opened, external water can enter the water supply device through the water inlet pipe 160. If the water supply device is a water purifier or other water purification device, the external water will first pass through the multi-layer water purification process, and then part of the water will enter the water storage tank through the water inlet 1601 of the water storage tank, and part of the water will become waste water and flow out through the drain pipe 140. The external water can be tap water, or can be bottled water, etc., which will not be repeated here.

[0056] In one embodiment of the present invention, the amount of water entering the water supply device through the water inlet pipe 160 and the amount of water entering the water tank through the water tank inlet 1601 may not be equal.

[0057] Figure 2 FIG. 1 is a flow chart of a water supply method for a water supply device according to an embodiment of the present invention. Figure 2 As shown, the method includes:

[0058] Step 210, obtaining the current temperature of the water in the water storage tank as the first temperature;

[0059] Step 220, obtaining the required water temperature as the second temperature;

[0060] Step 230, obtaining the temperature of the water to be injected as the third temperature;

[0061] Step 240, if the second temperature is lower than the first temperature, obtaining the volume of water to be discharged according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank and the total volume of the water storage tank;

[0062] Step 250, discharging the water at the first temperature in the water storage tank according to the volume of water to be discharged;

[0063] Step 260, injecting water at a third temperature until the water storage tank is filled with water;

[0064] Wherein, the temperature of water in the water storage tank filled with water is the second temperature.

[0065] In the embodiment of the present invention, if the temperature of the water required by the user is lower than the temperature of the current water in the water tank, the volume of water to be discharged is calculated first, and then a part of the water is discharged and then filled with water, so that the temperature of the water in the water tank is the temperature of the water required by the user. In the scheme of draining water while filling water in the prior art, the water at the third temperature injected will reduce the temperature of the water in the water tank so that the temperature of the water discharged at the same time is reduced. In the method of the embodiment of the present invention, the water is first drained and then filled with water. The water discharged before filling with water is all high-temperature water, that is, water at the first temperature. Therefore, although the method of the embodiment of the present invention wastes the same amount of heat as the scheme of draining water while filling water in the prior art, since the discharged water is all high-temperature water, less water resources are wasted. The method of first emptying the water in the water tank and then filling water for reheating in the prior art wastes more heat and more water resources. Therefore, the method of the embodiment of the present invention reduces the waste of heat and water resources, and can also meet the user's water demand for water of different temperatures.

[0066] In the method of the embodiment of the present invention, in step 240, the volume of water to be discharged is obtained according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank, and the total volume of the water storage tank. The volume of water to be discharged includes:

[0067] obtaining a difference between the first temperature and the third temperature as a first difference;

[0068] obtaining a difference between the second temperature and the third temperature as a second difference;

[0069] Obtaining a first heat difference according to the first difference and the current volume of water in the water storage tank;

[0070] Obtaining a second heat difference according to the second difference and the total volume of the water storage tank;

[0071] The volume of water to be discharged is obtained according to the first heat difference, the second heat difference and the first difference.

[0072] In the embodiment of the present invention, after the water at the third temperature is injected until the water storage tank is filled with water, the method further comprises:

[0073] Generate water availability reminder;

[0074] Receive water taking command;

[0075] According to the water intake command, water at the second temperature flows out of the water supply device.

[0076] The method of the embodiment of the present invention is based on the law of conservation of heat to calculate the volume of water to be discharged. The first temperature is recorded as T1, the second temperature is recorded as T2, the third temperature is recorded as T3, the total volume of water in the water storage tank is recorded as X, the current volume of water in the water storage tank is recorded as X1, the volume of water to be discharged is recorded as X2, the volume of water injected when the water at the third temperature is filled to full capacity is X3, the specific heat capacity of water is recorded as C, then:

[0077] X1-X2+X3=X

[0078] Before the water is discharged from the water storage tank, the heat of the water, Q1, is:

[0079] Q1=X1×T1×C

[0080] The heat Q2 of the discharged water is:

[0081] Q2=X2×T1×C

[0082] The heat Q3 contained in the injected water is:

[0083] Q3=X3×T3×C

[0084] After the water tank is filled with water, the heat Q contained in the water is:

[0085] Q=X×T2×C

[0086] According to the heat conservation theorem, we get:

[0087] Q1-Q2+Q3=Q

[0088] Substituting the above formulas into the following equations, we get:

[0089] X1×T1×C-X2×T1×C+X3×T3×C=X×T2×C

[0090]

[0091] Among them, X1 is the current volume of water in the water tank, X is the total volume in the water tank, T1 is the first temperature, T2 is the second temperature, T3 is the third temperature, and the second temperature is the required temperature.

[0092] In the embodiment of the present invention, the volume of water that needs to be discharged can be obtained according to the above formula.

[0093] In one embodiment of the present invention, the water supply device usually fills the water storage tank after any water is taken, and then heats it to boiling or a preset temperature and keeps it warm, that is, the water storage tank is usually full before water is taken.

[0094] Therefore, in one embodiment of the present invention, if the water storage tank is full when obtaining the volume of water to be discharged, that is, X=X1, the volume of water to be discharged is also equal to the volume of water injected, then the above formula can be simplified to:

[0095]

[0096] Wherein, T1 is the first temperature, T2 is the second temperature, T3 is the third temperature, and X is the total volume in the water storage tank.

[0097] In the above embodiment of the present invention, if the water tank is not full before the user needs water of the second temperature, it is necessary to detect the current volume of water in the water tank, so a water level meter needs to be configured in the water supply device. An additional water level meter will increase the cost of the water supply device.

[0098] In other embodiments of the present invention, the water supply equipment is not equipped with a water level meter, and the method of the embodiment of the present invention can also be implemented.

[0099] In the water supply device of the embodiment of the present invention, a high water level probe is configured, and the high water level probe can detect whether the water in the water storage tank has reached the maximum water level. The water in the water storage tank reaching the maximum water level is equivalent to the water in the water storage tank being full.

[0100] In the embodiment of the present invention, obtaining the current temperature of the water in the water storage tank as the first temperature includes:

[0101] determining whether the water storage tank is full according to the high water level probe;

[0102] If the water storage tank is not full, inject water at a third temperature until the water in the water storage tank is full;

[0103] The current temperature of the water in the full-capacity water storage tank is obtained as the first temperature.

[0104] In one embodiment of the present invention, in order to save costs, the water supply device is not provided with a water level detection device, so the actual capacity of the water tank cannot be accurately obtained. Therefore, in the embodiment of the present invention, before obtaining the current temperature of the water in the water tank as the first temperature, the water tank can be filled with water first, and then the current temperature is obtained as the first temperature.

[0105] In an embodiment of the present invention, the water supply equipment includes a water tank thermometer and a water inlet thermometer, the water tank thermometer is used to detect the temperature of water in the water tank, and the water inlet thermometer is used to detect the temperature of water injected into the water tank.

[0106] In the embodiment of the present invention, the water supply device further includes a drain pipe and a drain valve, and the step of draining the water of the first temperature in the water storage tank according to the volume of water to be drained includes:

[0107] The drain valve is opened to drain the water of the first temperature in the water storage tank from the drain pipe according to the volume of the water to be drained.

[0108] In the embodiment of the present invention, the water supply device further includes a water inlet pipe and a water inlet valve, and the injecting of water at the third temperature includes:

[0109] The water inlet valve is opened to allow the water at the third temperature to be injected into the water storage tank through the water inlet pipe.

[0110] In the embodiment of the present invention, the water supply device further includes a water intake pipe and a water intake valve, and the step of causing the water at the second temperature to flow out of the water supply device according to the water intake command includes:

[0111] The water intake valve is opened to allow water at the second temperature to flow out from the water intake pipe.

[0112] In the embodiment of the present invention, if the temperature of the water required by the user is lower than the temperature of the current water in the water tank, the volume of water to be discharged is first calculated, and then a portion of the water is discharged and then filled up again, so that the temperature of the water in the water tank is the temperature of the water required by the user. The method of the embodiment of the present invention reduces the waste of heat and water resources, and can also meet the water needs of users.

[0113] Figure 3 FIG. 1 is a schematic diagram showing the structure of a water supply device of a water supply equipment according to an embodiment of the present invention. Figure 3 As shown, the water supply equipment includes a water storage tank, and the device includes:

[0114] A water storage tank thermometer 310, used to obtain the current temperature of the water in the water storage tank as a first temperature;

[0115] The controller 320 is used to obtain the required water temperature as the second temperature;

[0116] A water inlet thermometer 330, used to obtain the temperature of the water to be injected as a third temperature;

[0117] The controller 320 is further configured to obtain the volume of water to be discharged according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank and the total volume of the water storage tank if the second temperature is lower than the first temperature;

[0118] A drain valve 340, used to drain the water of the first temperature in the water storage tank according to the volume of the water to be drained;

[0119] A water inlet valve 350 is used to inject water at a third temperature until the water storage tank is filled with water;

[0120] Wherein, the temperature of water in the water storage tank filled with water is the second temperature.

[0121] In the embodiment of the present invention, the controller 320 is further configured to:

[0122] obtaining a difference between the first temperature and the third temperature as a first difference;

[0123] obtaining a difference between the second temperature and the third temperature as a second difference;

[0124] Obtaining a first heat difference according to the first difference and the current volume of water in the water storage tank;

[0125] Obtaining a second heat difference according to the second difference and the total volume of the water storage tank;

[0126] The volume of water to be discharged is obtained according to the first heat difference, the second heat difference and the first difference.

[0127] In the embodiment of the present invention, the controller 320 is further configured to:

[0128] Generate water availability reminder;

[0129] Receive water taking command;

[0130] According to the water intake command, water at the second temperature flows out of the water supply device.

[0131] In the embodiment of the present invention, a high water level probe is provided in the water storage tank, and the controller 320 is also used to determine whether the water storage tank is full according to the high water level probe;

[0132] The controller 320 is also used to inject water of a third temperature if the water storage tank is not full, until the water in the water storage tank is full;

[0133] The water storage tank thermometer 310 is also used to obtain the current temperature of the water in the full-capacity water storage tank as the first temperature.

[0134] In the embodiment of the present invention, the water supply equipment includes a water tank thermometer 310 and a water inlet thermometer 330, wherein the water tank thermometer 310 is used to detect the temperature of water in the water tank, and the water inlet thermometer 330 is used to detect the temperature of water injected into the water tank.

[0135] In the embodiment of the present invention, the water supply equipment further includes a drain pipe and a drain valve 340, and the controller 320 is further used for:

[0136] The drain valve 340 is opened to drain the water of the first temperature in the water storage tank from the drain pipe according to the volume of the water to be drained.

[0137] In the embodiment of the present invention, the water supply device further includes a water inlet pipe and a water inlet valve 350, and the water at the third temperature is injected. The controller 320 is further used to:

[0138] The water inlet valve 350 is opened to allow the water at the third temperature to be injected into the water storage tank through the water inlet pipe.

[0139] The water supply equipment further includes a water intake pipe and a water intake valve, and the controller 320 is further used for:

[0140] The water intake valve is opened to allow water at the second temperature to flow out from the water intake pipe.

[0141] The embodiment of the present invention further provides a water purifier, and the water purifier applies the method as described above.

[0142] An embodiment of the present invention further provides a water purifier, which includes the device as described above.

[0143] Figure 2 FIG. 1 is a flow chart of a water supply method of a water supply device in one embodiment. It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0144] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0145] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A water supply method for water supply equipment, characterized in that: The water supply equipment includes a water storage tank, and the method includes: Acquire the current temperature of the water in the water storage tank as the first temperature; obtaining the temperature of the required water as the second temperature; obtaining the temperature of the water to be injected as the third temperature; If the second temperature is lower than the first temperature, the volume of water to be discharged is obtained according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank and the total volume of the water storage tank; Discharging the water at the first temperature in the water storage tank according to the volume of the water to be discharged; injecting water of a third temperature until the water storage tank is filled with water; Wherein, the temperature of water in the water storage tank filled with water is the second temperature.

2. The method according to claim 1, characterized in that The step of obtaining the volume of water to be discharged according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank, and the total volume of the water storage tank comprises: obtaining a difference between the first temperature and the third temperature as a first difference; obtaining a difference between the second temperature and the third temperature as a second difference; Obtaining a first heat difference according to the first difference and the current volume of water in the water storage tank; Obtaining a second heat difference according to the second difference and the total volume of the water storage tank; The volume of water to be discharged is obtained according to the first heat difference, the second heat difference and the first difference.

3. The method according to claim 1, characterized in that After injecting water of the third temperature until the water storage tank is filled with water, the method further comprises: Generate water availability reminder; Receive water taking command; According to the water intake command, water at the second temperature flows out of the water supply device.

4. The method according to claim 1, characterized in that The water storage tank is provided with a high water level probe, and obtaining the current temperature of the water in the water storage tank as the first temperature includes: determining whether the water storage tank is full according to the high water level probe; If the water storage tank is not full, inject water at a third temperature until the water in the water storage tank is full; The current temperature of the water in the full-capacity water storage tank is obtained as the first temperature.

5. The method according to claim 1, characterized in that The water supply equipment includes a water tank thermometer and a water inlet thermometer. The water tank thermometer is used to detect the temperature of water in the water tank, and the water inlet thermometer is used to detect the temperature of water injected into the water tank.

6. The method according to claim 1, characterized in that The water supply device further includes a drain pipe and a drain valve, and the water of the first temperature in the water storage tank is discharged according to the volume of the water to be discharged, including: The drain valve is opened to drain the water of the first temperature in the water storage tank from the drain pipe according to the volume of the water to be drained.

7. The method according to claim 1, characterized in that The water supply equipment further includes a water inlet pipe and a water inlet valve, and the water injected with the third temperature includes: The water inlet valve is opened to allow the water at the third temperature to be injected into the water storage tank through the water inlet pipe.

8. The method according to claim 3, characterized in that The water supply device further includes a water intake pipe and a water intake valve, and the method of causing the water at the second temperature to flow out of the water supply device according to the water intake command includes: The water intake valve is opened to allow water at the second temperature to flow out from the water intake pipe.

9. A water supply device for water supply equipment, characterized in that: The water supply equipment comprises a water storage tank, and the device comprises: a water storage tank thermometer, used to obtain the current temperature of the water in the water storage tank as a first temperature; A controller, used for obtaining the temperature of the required water as a second temperature; A water inlet thermometer, used to obtain the temperature of the water to be injected as the third temperature; The controller is further configured to obtain the volume of water to be discharged according to the first temperature, the second temperature, the third temperature, the current volume of water in the water storage tank and the total volume of the water storage tank if the second temperature is lower than the first temperature; A drain valve, used for discharging the water of the first temperature in the water storage tank according to the volume of the water to be discharged; a water inlet valve, used for injecting water of a third temperature until the water storage tank is filled with water; Wherein, the temperature of water in the water storage tank filled with water is the second temperature.

10. A water purifier, characterized in that: The water purifier uses the method according to any one of claims 1 to 8.

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