Drinking fountain based on heat recovery and control method thereof

Abstract

The present invention provides a heat recovery-based drinking fountain and its control method, comprising: a heat storage device, an instant heating heater, and a control valve sequentially connected via a water channel; the heat storage device is configured to heat raw water inputted into a water pipe at a first temperature to warm water at a second temperature; the second temperature warm water is then inputted into the instant heating heater; the instant heating heater is configured to heat the warm water to boiling water and input the boiling water into the control valve; the control valve is configured to split the boiling water into a first boiling water source and a second boiling water source; the first boiling water is inputted into the heat storage device; the heat storage device is further configured to recover heat from the first boiling water source and output warm water at a third temperature; the water channel is further configured to mix the third temperature warm water with the second boiling water source to output directly drinkable warm water at a first preset temperature. This drinking fountain can increase the output of water at a preset temperature, save electricity, and avoid situations where the water quality is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of drinking fountains, and in particular to a drinking fountain based on heat recovery and a control method thereof. Background Art

[0002] Currently, reverse osmosis (RO) water purifiers are the mainstream product in the market, providing consumers with purified water. As consumers' demands for purified water evolve, they are placing greater demands on the water's temperature, such as controlling it. Consumers currently primarily control the temperature of hot water for applications such as boiling water, making instant noodles, brewing tea, coffee, mixing milk powder, and making soup, and they demand different outlet water temperatures. Consequently, integrated water purification and heating systems have become popular products in the current market.

[0003] However, current integrated water purification and heating systems primarily rely on the following traditional technologies for heat exchange: volumetric water storage and heating methods, and instantaneous heating methods. These traditional technologies have limitations in specific usage scenarios. The volumetric water storage and heating method primarily stores purified water in a tank and uses electrical heating to heat the water in the tank to a set temperature before providing it to consumers. These methods lack instantaneous switching and adjustment control for users accessing different water temperatures, requiring additional water flow control, such as mixing, to adjust the water temperature. Furthermore, long-term storage in the tank creates stale water, which can easily lead to contamination. The instantaneous heating method, however, is limited to consumer usage and cannot exceed the current limit of household power supplies (10A or 16A). Therefore, even with temperature control through electrical heating power regulation, the hot water flow rate is relatively low when the water is delivered at a boiling water temperature (95-99°C), requiring consumers to wait for extended periods of time before accessing the water. Based on this, some upgrade options include hybrid heating systems. Specifically, the purified water is first heated to a preheating temperature before being subjected to instantaneous heating. This method leverages the temperature controllability of instantaneous heating to maintain both hot water flow rate and temperature control at a given preheating temperature. However, there are risks. For example, at a certain preheating temperature in the water storage tank, the heating power is limited, making it impossible to simultaneously meet the flow requirements for both hot and warm water. Furthermore, the repeated heating over extended periods of time can result in poor water quality and significant energy waste.

[0004] In general, existing drinking fountains still have problems such as insufficient water volume at the preset temperature, poor water quality, and waste of electricity. Summary of the Invention

[0005] The object of the present invention is to provide a drinking fountain based on heat recovery and a control method thereof, so as to increase the water output at a preset temperature and avoid the situation of poor water quality.

[0006] In a first aspect, an embodiment of the present invention provides a drinking fountain based on heat recovery, which comprises: a heat storage device, an instant heating heater and a control valve connected in sequence through a water channel; a water pipe is provided inside the shell of the heat storage device, and a phase change medium with a preset melting point or a large heat capacity liquid medium is provided between the outer side of the water pipe and the shell; an input end of the heat storage device is externally connected to a raw water source of a first temperature; the heat storage device is used to heat the raw water source input into the water pipe to warm water of a second temperature by solidifying the phase change medium or cooling the large heat capacity liquid medium; and output the warm water of the second temperature to the heat storage device. into the above-mentioned instant heating heater; the above-mentioned instant heating heater is used to heat the warm water of the above-mentioned second temperature to boiling, output boiling water, and input the above-mentioned boiling water into the above-mentioned control valve; the above-mentioned control valve is used to split the above-mentioned boiling water into first boiling water and second boiling water; and input the above-mentioned first boiling water into the above-mentioned heat storage device; the above-mentioned heat storage device is also used to recover the heat of the above-mentioned first boiling water input into the above-mentioned water pipe through the melting of the above-mentioned phase change medium or the heating of the above-mentioned large heat capacity liquid medium, and output warm water of a third temperature; the above-mentioned water channel is used to mix the above-mentioned warm water of the third temperature with the above-mentioned second boiling water, and output warm water of a first preset temperature that can be directly consumed.

[0007] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation method of the first aspect, wherein the above-mentioned drinking fountain also includes: a heat exchanger; the above-mentioned heat exchanger is connected to the above-mentioned heat storage device and the above-mentioned control valve; the input end of the above-mentioned heat exchanger is externally connected to a water source to be heated; the above-mentioned heat exchanger is used to heat the above-mentioned water source to be heated to the above-mentioned first temperature, and output the raw water source at the above-mentioned first temperature; and input the above-mentioned raw water source into the above-mentioned heat storage device.

[0008] In combination with the first possible implementation of the first aspect, an embodiment of the present invention provides a second possible implementation of the first aspect, wherein the above-mentioned heat exchanger is also used to input the above-mentioned third temperature warm water; cool the above-mentioned third temperature warm water and output warm water at a fourth temperature; the above-mentioned water channel is also used to input the above-mentioned fourth temperature warm water, and mix the above-mentioned fourth temperature warm water with the above-mentioned second boiling water, and output warm water at a second preset temperature that can be directly consumed.

[0009] In combination with the first aspect, an embodiment of the present invention provides a third possible implementation method of the first aspect, wherein the above-mentioned water dispenser also includes: a water vapor separator and a drain outlet; the above-mentioned instant heater, the above-mentioned water vapor separator and the above-mentioned drain outlet are connected in sequence; the above-mentioned water vapor separator is used to separate the steam in the above-mentioned boiling water and discharge it through the above-mentioned drain outlet.

[0010] In combination with the second possible implementation of the first aspect, an embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein the above-mentioned water dispenser also includes: a one-way valve; the above-mentioned one-way valve is connected to the above-mentioned heat exchanger; the above-mentioned one-way valve is used to output warm water of the above-mentioned fourth temperature.

[0011] In combination with the fourth possible implementation of the first aspect, the embodiment of the present invention provides a fifth possible implementation of the first aspect, wherein the above-mentioned water dispenser also includes: a water purification device and a water pump; the above-mentioned water purification device, the water pump and the above-mentioned heat exchanger are connected in sequence; the input end of the above-mentioned water purification device is externally connected to a water source; the above-mentioned water purification device is used to purify the above-mentioned water source and output the purified water source; the above-mentioned water pump is used to pressurize the input above-mentioned purified water source and output a high-pressure water source; the above-mentioned heat exchanger is also used to heat the above-mentioned high-pressure water source to the above-mentioned first temperature and output the raw water source at the above-mentioned first temperature.

[0012] In combination with the fifth possible implementation of the first aspect, an embodiment of the present invention provides a sixth possible implementation of the first aspect, wherein the above-mentioned water dispenser also includes: a first electric valve, a second electric valve, a third electric valve and a fourth electric valve; the above-mentioned first electric valve is connected to the above-mentioned water purification device; the above-mentioned first electric valve is used to output the above-mentioned purified water source after purification; the above-mentioned water purification device, the above-mentioned second electric valve and the above-mentioned water pump are connected in sequence; the above-mentioned instant heater is connected to the above-mentioned third electric valve; the above-mentioned third electric valve is used to output the above-mentioned boiling water; the above-mentioned one-way valve is connected to the above-mentioned fourth electric valve; the above-mentioned fourth electric valve is used to output the above-mentioned warm water that can be directly consumed at the above-mentioned second preset temperature.

[0013] In combination with the first aspect, an embodiment of the present invention provides a seventh possible implementation of the first aspect, wherein the above-mentioned heat storage device further includes: an electric heater; the above-mentioned electric heater is used to preheat the above-mentioned phase change medium or the above-mentioned large heat capacity liquid medium.

[0014] In a second aspect, an embodiment of the present invention provides a control method for a water dispenser based on heat recovery, wherein the method is applied to the water dispenser based on heat recovery in any one of the first aspect to the seventh possible implementation manner of the first aspect, the method comprising: heating the raw water source input into the water pipe to warm water at a second temperature by solidifying the phase change medium in the heat storage device or cooling the large heat capacity liquid medium to release energy; and inputting the warm water at the second temperature into the instant heating heater; heating the warm water at the second temperature to boiling by the instant heating heater, outputting boiling water, and inputting the boiling water into the control valve; dividing the boiling water into first boiling water and second boiling water by the control valve; and inputting the first boiling water into the heat storage device; recovering the heat of the first boiling water input into the water pipe by solidifying the phase change medium in the heat storage device or heating the large heat capacity liquid medium to absorb energy, and outputting warm water at a third temperature; mixing the warm water at the third temperature with the second boiling water through the water channel, and outputting warm water that can be directly consumed at a first preset temperature.

[0015] In combination with the second aspect, an embodiment of the present invention provides a first possible implementation of the second aspect, wherein the above-mentioned drinking fountain also includes: a heat exchanger; the input end of the above-mentioned heat exchanger is externally connected to a water source to be heated; the above-mentioned raw water source input into the above-mentioned water pipe is heated to warm water at a second temperature through the solidification of the above-mentioned phase change medium in the heat storage device or the cooling of the above-mentioned large heat capacity liquid medium to release energy; and before the step of inputting the above-mentioned warm water at the second temperature into the above-mentioned instant heater, the above-mentioned method includes: heating the above-mentioned water source to be heated to the above-mentioned first temperature through the heat exchanger, and outputting the above-mentioned raw water source at the first temperature; and inputting the above-mentioned raw water source into the above-mentioned heat storage device.

[0016] The embodiments of the present invention bring the following beneficial effects:

[0017] The present invention provides a drinking fountain based on heat recovery and a control method thereof, comprising: a heat storage device, an instant heating heater and a control valve connected in sequence through a water channel; a water pipe is provided inside the shell of the heat storage device, and a phase change medium or a large heat capacity liquid medium with a preset melting point is provided between the outer side of the water pipe and the shell; an input end of the heat storage device is externally connected to a raw water source of a first temperature; the heat storage device is used to heat the raw water source input into the water pipe to warm water of a second temperature by solidifying the phase change medium or cooling the large heat capacity liquid medium; and input the warm water of the second temperature into The instant heating heater is used to heat the warm water at the second temperature to boiling, output boiling water, and input the boiling water into the control valve. The control valve is used to split the boiling water into first boiling water and second boiling water, and input the first boiling water into the heat storage device. The heat storage device is also used to absorb energy through the melting of the phase change medium or the heating of the large heat capacity liquid medium, recover the heat of the first boiling water input into the water pipe, and output warm water at a third temperature. The water channel is used to mix the warm water at the third temperature with the second boiling water, and output warm water at a first preset temperature that can be directly consumed. This water dispenser can increase the water output at the preset temperature and avoid situations where the water quality is poor.

[0018] Other features and advantages disclosed in this embodiment will be described in the subsequent description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in this embodiment.

[0019] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of a heat recovery-based drinking fountain provided by an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of another heat recovery-based drinking fountain provided by an embodiment of the present invention;

[0023] Figure 3A schematic flow chart of a control method for a drinking fountain based on heat recovery provided in an embodiment of the present invention.

[0024] Icons: 11-heat storage device; 12-instantaneous heater; 13-control valve; 14-heat exchanger; 15-boiling point regulator; 16-water vapor separator; 17-drain outlet; 18-check valve; 19-water purification device; 20-water pump; 21-first electric valve; 22-second electric valve; 23-third electric valve; 24-fourth electric valve; 25-faucet; 30-boiling water; 31-warm water at the second preset temperature that can be directly consumed; 32-purified water source; 110-electric heater. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Current integrated water purification and heating systems primarily utilize the following traditional technologies for heat exchange: volumetric water storage and heating, and instantaneous heating. These traditional technologies present limitations in specific scenarios. The volumetric water storage and heating method primarily stores purified water in a tank, which is then heated to a set temperature using electrical heating before being dispensed by consumers. These methods lack instantaneous switching and adjustment control for users accessing different water temperatures, requiring additional water flow control, such as water mixing. The instantaneous heating method, however, is limited to consumer usage and cannot exceed the current limit of household power supplies (10A or 16A). Therefore, even with electrical heating power regulation and temperature control, the hot water flow rate is relatively low when discharging at a boiling water temperature (95-99°C), requiring consumers to wait for extended periods of time before dispensing water. Based on this, some upgrade options utilize hybrid heating systems. Specifically, the purified water is first heated to a preheating temperature before undergoing instantaneous heating. This method leverages the temperature controllability of instant heating to achieve both hot water flow rate and temperature control at a given preheating temperature. However, there are risks. For example, at a given preheating temperature of the water storage tank and within a certain heating power limit, it may not simultaneously provide sufficient flow of both hot and warm water. Furthermore, prolonged heating can lead to poor water quality.

[0027] Based on this, embodiments of the present invention provide a heat recovery-based drinking fountain and its control method. This technology can increase the output of water at a preset temperature and avoid suboptimal water quality. To facilitate understanding of the embodiments of the present invention, a heat recovery-based drinking fountain disclosed in the embodiments of the present invention is first described in detail.

[0028] Example 1

[0029] like Figure 1 The schematic diagram of the structure of a water dispenser based on heat recovery provided by an embodiment of the present invention. Figure 1 As can be seen, the drinking fountain includes a heat storage device 11, an instant heater 12 and a control valve 13 which are sequentially connected through a water channel.

[0030] A water pipe is provided inside the shell of the heat storage device 11 , and a phase change medium with a preset melting point or a large heat capacity liquid medium is provided between the outside of the water pipe and the shell.

[0031] Furthermore, the input end of the above-mentioned heat storage device 11 is externally connected to a raw water source of a first temperature; the above-mentioned heat storage device 11 is used to release energy by solidifying the above-mentioned phase change medium or cooling the above-mentioned large heat capacity liquid medium, and heat the above-mentioned raw water source input into the above-mentioned water pipe to warm water of a second temperature; and input the above-mentioned warm water of the second temperature into the above-mentioned instant heater 12; the above-mentioned instant heater 12 is used to heat the above-mentioned warm water of the second temperature to boiling, output boiling water 30, and input the above-mentioned boiling water 30 into the above-mentioned control valve 13; the above-mentioned control valve 13 is used to split the above-mentioned boiling water into first boiling water and second boiling water; and input the above-mentioned first boiling water into the above-mentioned heat storage device 11; the above-mentioned heat storage device 11 is also used to absorb energy by melting the above-mentioned phase change medium or heating the above-mentioned large heat capacity liquid medium, recover the heat of the above-mentioned first boiling water input into the above-mentioned water pipe, and output warm water of a third temperature; the above-mentioned water channel is used to mix the above-mentioned warm water of the third temperature with the above-mentioned second boiling water, and output warm water of the first preset temperature that can be directly consumed.

[0032] Specifically, the large heat capacity liquid medium includes water and freezing liquid; the phase change medium includes paraffin and paraffin mixed with heat conducting medium.

[0033] In actual operation, the heat storage device 11 includes a first output end and a second output end; the warm water at the second temperature is input from the first output end to the instant heater; the heat of the first boiling water in the water pipe input into the second input end is recovered, and the warm water at the third temperature is output.

[0034] exist Figure 1 Based on the schematic diagram of the heat recovery drinking fountain shown in the figure, Figure 2A schematic structural diagram of another heat recovery-based drinking fountain provided in an embodiment of the present invention.

[0035] Depend on Figure 2 As can be seen, the above-mentioned drinking fountain also includes: a heat exchanger 14; the above-mentioned heat exchanger 14 is connected to the above-mentioned heat storage device 11 and the above-mentioned control valve 13; the input end of the above-mentioned heat exchanger 14 is externally connected to a water source to be heated; the above-mentioned heat exchanger 14 is used to heat the above-mentioned water source to be heated to the above-mentioned first temperature, and output the raw water source at the above-mentioned first temperature; and input the above-mentioned raw water source into the above-mentioned heat storage device 11.

[0036] In this embodiment, to address temperature deviations caused by seasonal fluctuations in water source temperature, as well as temperature fluctuations in the phase-change medium within the heat storage tank caused by the on-off switch control of the heat storage device 11, which can lead to deviations in the precise control of the outlet water temperature, the water dispenser is designed to mix the warm water at the third temperature with the boiling water at the second temperature to achieve the set value. This allows for precise regulation across the entire temperature range while maximizing heat storage and reuse.

[0037] In a preferred embodiment, the heat exchanger 14 is also used to input the warm water of the third temperature; cool the warm water of the third temperature and output warm water of the fourth temperature; the water channel is also used to input the warm water of the fourth temperature, and mix the warm water of the fourth temperature with the second boiling water, and output warm water 31 of the second preset temperature that can be directly quoted.

[0038] Furthermore, in this embodiment, the water dispenser cools the boiled water to a certain temperature through the heat storage device 11, and then cools the warm water at the third temperature through the heat exchanger 14 to output warm water at the fourth temperature, thereby achieving the function of "cooled boiled water".

[0039] In a preferred embodiment, the water dispenser further includes: a water vapor separator 16 and a drain outlet 17; the instant heater 12, the water vapor separator 16 and the drain outlet 17 are connected in sequence; the water vapor separator 16 is used to separate the steam in the boiling water and discharge it through the drain outlet 17.

[0040] In a preferred embodiment, the water dispenser further comprises: a boiling point regulator 15; the instant heater 12, the boiling point regulator 15, and the water vapor separator 16 are connected in sequence; the boiling point regulator 15 is used to adjust the boiling point of the boiling water.

[0041] In a preferred embodiment, the water dispenser further comprises: a one-way valve 18; the one-way valve 18 is connected to the heat exchanger 14; the one-way valve 18 is used to output warm water at the fourth temperature.

[0042] In a preferred embodiment, a water purification device 19 and a water pump 20; the water purification device 19, the water pump 20 and the heat exchanger 14 are connected in sequence; the input end of the water purification device 19 is externally connected to a water source; the water purification device 19 is used to purify the water source and output the purified water source; the water pump 20 is used to pressurize the input purified water source and output a high-pressure water source; the heat exchanger 14 is also used to heat the high-pressure water source to the first temperature and output the raw water source at the first temperature.

[0043] In a preferred embodiment, the drinking fountain further comprises: a first electric valve 21, a second electric valve 22, a third electric valve 23 and a fourth electric valve 24; the first electric valve 21 is connected to the water purification device 19; the first electric valve 21 is used to output the purified water source 32; the water purification device 19, the second electric valve 22 and the water pump 20 are connected in sequence; the instant heater 12 is connected to the third electric valve 23; the third electric valve 23 is used to output the boiling water; the one-way valve 18 is connected to the fourth electric valve 24; the fourth electric valve 24 is used to output the warm water 31 that can be directly consumed at the second preset temperature.

[0044] In a preferred embodiment, the heat storage device 11 further includes an electric heater 110 ; the electric heater 110 is used to preheat the phase change medium or the large heat capacity liquid medium.

[0045] In a preferred embodiment, the water dispenser further comprises a faucet 25. The faucet 25 may also be referred to as a water spout.

[0046] The present invention provides a drinking fountain based on heat recovery, comprising: a heat storage device, an instant heating heater and a control valve connected in sequence through a water channel; a water pipe is provided inside the shell of the heat storage device, and a phase change medium with a preset melting point or a large heat capacity liquid medium is provided between the outer side of the water pipe and the shell; an input end of the heat storage device is externally connected to a raw water source of a first temperature; the heat storage device is used to release energy by solidification of the phase change medium or cooling of the large heat capacity liquid medium, thereby heating the raw water source input into the water pipe to warm water of a second temperature; and inputting the warm water of the second temperature into the instant heating valve. The instantaneous heating heater is used to heat the warm water at the second temperature to boiling, output boiling water, and input the boiling water into the control valve. The control valve is used to split the boiling water into first boiling water and second boiling water. The first boiling water is input into the heat storage device. The heat storage device is also used to absorb energy through the melting of the phase change medium or the heating of the large heat capacity liquid medium, recover the heat of the first boiling water input into the water pipe, and output warm water at a third temperature. The water channel is also used to mix the warm water at the third temperature with the second boiling water to output warm water at a first preset temperature that can be directly consumed. This water dispenser can increase the water output at the preset temperature and avoid situations where the water quality is poor.

[0047] Example 2

[0048] exist Figure 1 Based on the schematic diagram of the heat recovery drinking fountain shown in the figure, Figure 3 A schematic flow chart of a control method for a drinking fountain based on heat recovery provided in an embodiment of the present invention.

[0049] Depend on Figure 3 As can be seen, the method includes the following steps S301-S305:

[0050] Step S301: The raw water source input into the water pipe is heated to a second temperature by solidifying the phase change medium in the heat storage device or by cooling the large heat capacity liquid medium to release energy; and the second temperature warm water is input into the instant heater.

[0051] Step S302: heating the water at the second temperature to boiling by the instant heater, outputting the boiling water, and inputting the boiling water into the control valve.

[0052] Step S303: dividing the boiling water into first boiling water and second boiling water through the control valve; and inputting the first boiling water into the heat storage device.

[0053] Step S304: recovering the heat of the first boiling water input into the water pipe by solidifying the phase change medium in the heat storage device or absorbing energy by heating the large heat capacity liquid medium, and outputting warm water of a third temperature.

[0054] Step S305: Mixing the warm water at the third temperature with the second boiling water through the water channel to output warm water at the first preset temperature that can be directly consumed.

[0055] In one embodiment, the water dispenser further comprises: a heat exchanger; an input end of the heat exchanger is externally connected to a water source to be heated; the raw water source input into the water pipe is heated to warm water at a second temperature by solidification of the phase change medium in the heat storage device or cooling of the large heat capacity liquid medium to release energy; and before the step of inputting the warm water at the second temperature into the instant heater, the method comprises the following steps A1 to A2:

[0056] Step A1: heating the water source to be heated to the first temperature through a heat exchanger, and outputting the raw water source at the first temperature.

[0057] Step A2: Input the raw water source into the heat storage device.

[0058] The control method for a heat recovery drinking fountain provided in an embodiment of the present invention shares the same technical features as the heat recovery drinking fountain provided in the aforementioned embodiment, and therefore solves the same technical problems and achieves the same technical effects. Those skilled in the art will clearly understand that, for ease and brevity of description, the specific operating process of the device described above can refer to the corresponding process in the aforementioned method embodiment and will not be repeated here.

[0059] In addition, in the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0060] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A drinking fountain based on heat recovery, characterized in that: include: A heat storage device, an instant heater, a control valve and a heat exchanger connected in sequence through a water channel; A water pipe is provided inside the shell of the heat storage device, and a phase change medium with a preset melting point or a large heat capacity liquid medium is provided between the outer side of the water pipe and the shell; an input end of the heat storage device is externally connected to a raw water source at a first temperature; The heat storage device is used to release energy by solidifying the phase change medium or cooling the large heat capacity liquid medium, thereby heating the raw water source input into the water pipe to warm water at a second temperature; and inputting the warm water at the second temperature into the instant heater; The instant heater is used to heat the warm water at the second temperature to boiling, output boiling water, and input the boiling water into the control valve; The control valve is used to divide the boiling water into first boiling water and second boiling water; and input the first boiling water into the heat storage device; The heat storage device is further configured to absorb energy through the melting of the phase change medium or the heating of the large heat capacity liquid medium, recover the heat of the first boiling water input into the water pipe, and output warm water at a third temperature; The water channel is used to mix the warm water at the third temperature with the second boiling water to output warm water at the first preset temperature that can be directly drunk; The heat exchanger is connected to the heat storage device and the control valve; the input end of the heat exchanger is externally connected to a water source to be heated; The heat exchanger is used to heat the water source to be heated to the first temperature, output the raw water source at the first temperature; and input the raw water source into the heat storage device; The heat exchanger is further configured to input the warm water at the third temperature; cool the warm water at the third temperature; and output warm water at a fourth temperature; The water channel is also used to input warm water at the fourth temperature, mix the warm water at the fourth temperature with the second boiling water, and output warm water at the second preset temperature that can be directly consumed.

2. The heat recovery-based drinking fountain according to claim 1, characterized in that: The drinking fountain further comprises: a water vapor separator and a water drain; The instant heater, the water vapor separator and the drain outlet are connected in sequence; The water vapor separator is used to separate the steam in the boiling water and discharge it through the drain port.

3. The heat recovery-based drinking fountain according to claim 2, characterized in that: The drinking fountain further comprises: a one-way valve; The one-way valve is connected to the heat exchanger; The one-way valve is used to output warm water at the fourth temperature.

4. The heat recovery-based drinking fountain according to claim 3, characterized in that: The drinking fountain further comprises: a water purification device and a water pump; The water purification device, the water pump and the heat exchanger are connected in sequence; The input end of the water purification device is externally connected to a water source; The water purification device is used to purify the water source and output the purified water source; The water pump is used to pressurize the input purified water source and output high-pressure water source; The heat exchanger is further used to heat the high-pressure water source to the first temperature and output the raw water source at the first temperature.

5. The heat recovery-based drinking fountain according to claim 4, characterized in that: The drinking fountain further comprises: a first electric valve, a second electric valve, a third electric valve and a fourth electric valve; The first electric valve is connected to the water purification device; the first electric valve is used to output the purified water source; The water purification device, the second electric valve and the water pump are connected in sequence; The instant heater is connected to the third electric valve; the third electric valve is used to output the boiling water; The one-way valve is connected to the fourth electric valve; the fourth electric valve is used to output warm water that can be directly consumed at the second preset temperature.

6. The heat recovery-based drinking fountain according to claim 1, characterized in that: The heat storage device further comprises: an electric heater; The electric heater is used to preheat the phase change medium or the large heat capacity liquid medium.

7. A control method for a drinking fountain based on heat recovery, characterized in that: The method is applied to the heat recovery-based drinking fountain according to any one of claims 1 to 6, and the method comprises: The raw water source input into the water pipe is heated to a second temperature by solidification of the phase change medium in the heat storage device or cooling of the large heat capacity liquid medium to release energy; and the second temperature warm water is input into the instant heater; heating the warm water at the second temperature to boiling by the instant heater, outputting the boiling water, and inputting the boiling water into the control valve; Dividing the boiling water into first boiling water and second boiling water through the control valve; and inputting the first boiling water into the heat storage device; The heat of the first boiling water input into the water pipe is recovered by solidifying the phase change medium in the heat storage device or by heating the large heat capacity liquid medium to absorb energy, and warm water of a third temperature is output; Mixing the warm water at the third temperature with the second boiling water through the water channel to output directly drinkable warm water at a first preset temperature; The drinking fountain further comprises a heat exchanger; an input end of the heat exchanger is externally connected to a water source to be heated; the raw water source input into the water pipe is heated to warm water at a second temperature by releasing energy through solidification of the phase change medium in the heat storage device; and before the step of inputting the warm water at the second temperature into the instant heater, the method comprises: heating the water source to be heated to the first temperature through a heat exchanger, outputting a raw water source at the first temperature; and inputting the raw water source into the heat storage device; inputting the warm water at the third temperature through the heat exchanger; cooling the warm water at the third temperature and outputting warm water at a fourth temperature; The warm water of the fourth temperature is input through the water channel, and the warm water of the fourth temperature is mixed with the second boiling water, and the warm water of the second preset temperature that can be directly consumed is output.

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