A drinking water supply system and a water dispenser

Abstract

The utility model belongs to drinking water equipment technical field, concretely relates to a drinking water supply system and drinking water machine. The utility model discloses: water inlet pipeline, including the parallelly connected normal temperature water pipeline and first branch, be equipped with on-off electromagnetic valve on normal temperature water pipeline, first water pump, be located on first branch, heater, with the export of first branch intercommunication, hot water pipeline, its one end with the export of heater intercommunication, water nozzle, with normal temperature water pipeline and hot water pipeline intercommunication simultaneously, preheat water tank, its import is equipped with the return heat water pipeline, and the return heat water pipeline is communicated with hot water pipeline through the reversing valve, and its export is equipped with second branch, and the export of second branch is connected to first branch on the side. The utility model is used to solve the technical problem that the drinking water heating system of prior art can not provide timely hot water, can provide timely hot water but the water output is small and can not provide multi-temperature zone hot water.

Description

Technical Field

[0001] This utility model belongs to the field of drinking water equipment technology, specifically relating to a drinking water supply system and a water dispenser. Background Technology

[0002] Drinking hot water is a basic necessity for Chinese people. In addition to direct drinking water, this includes 45℃ hot water for making formula and 65℃ hot water for making honey water. Currently, there are many ways to heat water, including traditional methods such as kettles, water dispenser heating systems used with water purifiers, and faucet heating systems.

[0003] The existing heating systems have the following defects: 1. Traditional heating systems like kettles require a heating time when drinking hot water, and cannot provide hot water in a timely manner; 2. Water dispensers and faucet heating systems generally use two types of heating methods: instant heating and storage tank heating. The drawback of instant heating is that the heating power used is generally around 2200 watts. Due to the power limitation, the hot water output is very small, basically maintained at 400ml / min. The drawback of storage tank heating is similar to that of kettles. After the hot water in the tank is used up, there is a waiting period for the water to be reheated, and hot water cannot be provided in a timely manner.

[0004] In addition, the aforementioned drinking water heating system can only provide hot water at a single temperature, and cannot provide hot water in different temperature zones. Utility Model Content

[0005] This utility model provides a drinking water supply system and a water dispenser to solve the technical problems of existing drinking water heating systems that either cannot provide hot water in a timely manner, or can provide hot water in a timely manner but with a small output, or cannot provide hot water in multiple temperature zones. This utility model includes: a water inlet pipeline, comprising a normal temperature water pipeline and a first branch line arranged in parallel, wherein an on / off solenoid valve is provided on the normal temperature water pipeline; The first water pump is located on the first branch line; The heater is connected to the outlet of the first branch. A hot water pipe, one end of which is connected to the outlet of the heater; The faucet is connected to both the ambient temperature water pipe and the hot water pipe. The preheating water tank has a return hot water pipe at its inlet, which is connected to the hot water pipe through a reversing valve. Its outlet has a second branch, which is connected to the first branch. The preheating water tank is equipped with an insulation layer.

[0006] In this utility model, the water tap connects the ambient temperature water pipe and the hot water pipe. The hot water pipe includes T1 temperature heated water that flows directly from the heater and T2 temperature heated water that enters the heater for secondary heating from the preheated water tank, thus forming a multi-level water temperature supply. In addition, since the preheated water tank contains heated water that has been preheated to T2 temperature, even if heated water at T3 temperature is needed, the heater can heat it in time to meet the demand for hot water supply.

[0007] Furthermore, the preheating water tank is also equipped with high and low liquid level sensors, a first temperature sensor, and a heat preservation heater. The top of the preheating water tank is also equipped with an exhaust pipe, which is connected to the water tap. The advantages of this step are: the high and low liquid level sensors control the capacity of the preheating water tank within a reasonable range; the first temperature sensor and the heat preservation heater maintain the hot water in the preheating water tank within a stable temperature range; and the exhaust pipe can discharge excess gas, preventing the preheating water tank from expanding.

[0008] Furthermore: a pressure reducing valve is also provided on the first branch, and a third branch is provided at the rear end of the pressure reducing valve, which is connected to the preheating water tank; The third branch is equipped with a water supply valve. The beneficial effect of this step is that by reducing the inlet water pressure through the pressure reducing valve, a stable inlet water pressure can be provided, avoiding system fluctuations.

[0009] Furthermore, a negative pressure valve is also provided at the front end of the first water pump. The beneficial effect of this step is that the negative pressure valve can ensure that the water will only be introduced when the first water pump is working and when the inlet of the first water pump generates suction.

[0010] Furthermore: the connection point between the first branch and the second branch is located at the front or rear end of the first water pump; When the connection point is at the front end of the first water pump, a second solenoid valve is provided on the second branch, and a first solenoid valve is provided on the first branch. The first solenoid valve is located between the negative pressure valve and the connection point. The second solenoid valve is interlocked with the first solenoid valve; When the connection point is at the rear end of the first water pump, a second water pump is provided on the second branch; Both the first and second water pumps are DC motors. The beneficial effect of this step is to control whether the preheated water from the preheating tank enters the heater.

[0011] Furthermore: a flow meter is provided at the front end of the heater, and a second temperature sensor is provided inside the heater. The beneficial effect of this step is that the temperature and flow rate of the water are detected by the flow meter and the second temperature sensor.

[0012] This utility model also provides a water dispenser, including: Drinking water supply system as described in any of the above; The purification system is connected to the inlet of the water inlet pipe.

[0013] Improving the cleanliness of the water source for the drinking water supply system through a purification system can reduce the scaling rate of the drinking water supply system and extend its service life.

[0014] The beneficial effects of this utility model are: 1. The drinking water supply system can provide drinking water at multiple temperatures to meet the different water needs of users; 2. When providing hot water in different temperature zones, there is no need to wait for the heating process, and hot water at different temperatures can be used immediately. 3. By using a preheating water tank and gradient temperature water supply design, the temperature difference between the inlet and outlet water of the heater is reduced, which can provide hot water at multiple temperatures while also meeting the demand for large water output. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of a drinking water supply system according to a first embodiment of this utility model; Figure 2 This is a schematic diagram of a second embodiment of a drinking water supply system provided by this utility model.

[0017] Figure label: 1-Inlet water pipe; 2-First water pump; 3-Heater; 4-Hot water pipe; 5-Water tap; 6-Preheating water tank; 7-Return hot water pipe; 8-Reversing valve; 9-Second branch; 10-Flow meter; 11-Normal temperature water pipe; 12-First branch; 31-Second temperature sensor; 61-High and low liquid level sensor; 62-First temperature sensor; 63-Insulated heater; 64-Exhaust pipe; 65-Exhaust port; 91-Second water pump; 92-Second solenoid valve; 111-On / off solenoid valve; 121-Pressure reducing valve; 122-Third branch; 123-Negative pressure valve; 124-First solenoid valve; 1221-Water supply valve. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0019] Implementation of this application, for example Figure 1 and Figure 2 As shown, this utility model provides a drinking water supply system.

[0020] This utility model includes: a water inlet pipe 1, including a room temperature water pipe 11 and a first branch 12 connected in parallel. The room temperature water pipe 11 is equipped with an on / off solenoid valve 111, which controls the on / off of the room temperature water pipe 11 to determine whether room temperature water is output. Under normal circumstances, the water supply end connected to this system has its own pressure, so no water pump is installed on the room temperature water pipe 11. The first water pump 2 is installed on the first branch 12; Heater 3 is connected to the outlet of the first branch 12. The flow rate into heater 3 is controlled by the first water pump 2. With the heating power of heater 3 remaining constant, the outlet water temperature is adjusted by regulating the inlet water flow rate. Hot water pipe 4, one end of which is connected to the outlet of heater 3; The water tap 5 is connected to both the ambient temperature water pipe 11 and the hot water pipe 4. The ambient temperature water pipe 11 and the hot water pipe 4 supply water alternately, and water of different temperatures can be provided through one water tap 5. The preheating water tank 6 has a return hot water pipe 7 at its inlet. The return hot water pipe 7 is connected to the hot water pipe 4 through a reversing valve 8. The reversing valve 8 is a one-inlet, two-outlet type, with two outlets for switching use. Its outlet has a second branch 9, and the outlet of the second branch 9 is connected to the first branch 12. In addition, considering the convenience of instant water supply and daily water demand, the volume of the preheating water tank 6 is more than 2L.

[0021] In this utility model, the water tap 5 connects the ambient temperature water pipe 11 and the hot water pipe 4. The hot water pipe 4 includes T1 temperature heated water that flows directly from the heater 3 and T2 temperature heated water that enters the heater 3 for secondary heating from the preheated hot water tank 6, thus forming a multi-level water temperature supply. In addition, since the preheated hot water tank 6 contains heated water that has been preheated to T2 temperature, even if heated water at T3 temperature is needed, the heater can heat it in time to meet the demand for hot water supply.

[0022] Specifically, this system is generally used indoors, and the water source for the inlet pipe 1 is at room temperature, normally around 20℃. The room temperature water is heated to about 45℃ by the heater 3. The reversing valve 8 connects the heater 3 to the hot water pipe 4, and the water is discharged through the hot water pipe 4, which can be used for making milk. In addition, when the reversing valve 8 connects the heater 3 to the return hot water pipe 7, the preheating water tank 6 forms a circulation pipeline with the heater 3 through the second branch 9 and the return hot water pipe 7. The heater 3 can circulate and heat the water in the preheating water tank 6 to 65℃. Then, the reversing valve 8 is switched to connect the heater 3 to the hot water pipe 4. At this time, the 65℃ water in the preheating water tank 6 can be discharged through the hot water pipe 4 when the heater 3 is not working, or it can continue to be heated by the heater 3 to raise the water temperature to about 90℃ before being discharged. In summary, the faucet 5 can discharge room temperature water, 45℃ water, 65℃ water and 90℃ water as needed when the internal pipeline is switched.

[0023] Furthermore, 45℃ water is heated using room temperature water, and 90℃ water is heated using 65℃ water. The temperature difference before and after heating these two types of water is similar. Given similar or identical water supply flow rates, based on the heat calculation formula Q=cmΔt (c - specific heat capacity of water, m - mass of water, and Δt - temperature difference), the heat required by heater 3 to heat these two types of water is similar or the same. Therefore, the same heater 3 can meet the usage requirements. As for the 65℃ hot water, it can be achieved through circulating heating.

[0024] When heater 3 has a power of 3200 watts, it can supply 95℃ boiling water at a flow rate of 1.5L / min. The calculation is as follows: Calculation conditions: Water volume: 1.5L; Mass of water: The density of water is approximately 1 kg / L, therefore the mass m = 1.5 L x 1 kg / L = 1.5 kg; Temperature change: Initial temperature 65℃, target temperature 95℃, temperature difference 95-65=30℃; Heating time: 60 seconds; Specific heat capacity of water: C = 4200 J / kg·℃ (energy required to raise the temperature of water by 1℃ per kilogram). Accounting steps: 1. Required calories The formula for heat is: Q = m × C × ΔT; Q = 1.5 kg × 4200 J / kg·℃ × 30℃ = 189000 J (joules); 2. Heating power calculation P=Q / T, T=60 seconds; P = 189000 / 60 = 3150W; therefore, the 3200W heater 3 can meet the demand for 95℃ hot water at a rate of 1.5L / min. Similarly, heater 3 can heat room temperature water to approximately 45℃; and due to the presence of the preheating water tank 6, this system can provide sufficient hot water with multiple temperature settings in an instant hot water mode.

[0025] Based on the above technical solution, the preheating water tank 6 is also equipped with a high / low liquid level sensor 61, a first temperature sensor 62, and a heat preservation heater 63. The top of the preheating water tank 6 is also equipped with an exhaust pipe 64, which is connected to the water tap 5. The high / low liquid level sensor 61 controls the capacity of the preheating water tank 6 within a reasonable range to avoid the water level in the preheating water tank 6 being too high or too low. The first temperature sensor 62 and the heat preservation heater 63 maintain the hot water in the preheating water tank 6 within a stable temperature range. If necessary, the preheating water tank 6 can also be heat-insulated by setting an insulation layer, such as wrapping it with insulation cotton or setting a heat insulation layer. The exhaust pipe 64 can discharge excess gas to prevent the preheating water tank 6 from expanding. In addition, the preheating water tank 6 is also equipped with a drain port. When the water in the hot water tank 6 is not used for a long time, it can be discharged through the drain port instead of being discharged through the hot water pipe 4, thus avoiding contamination of commonly used pipes such as the second branch 9, the first branch 12, the heater 3, and the hot water pipe 4. There are many ways to detect that the water in the hot water tank 6 has not been used for a long time. You can detect the interval between the switching of the pipes by the reversing valve 8, or you can directly detect the water quality in the preheating water tank 6.

[0026] Based on the above technical solution, the first branch 12 is also provided with a pressure reducing valve 121, and the rear end of the pressure reducing valve 121 is provided with a third branch 122, which is connected to the preheated water tank 6. The third branch 122 is equipped with a water supply valve 1221. Since the water inlet pipe 1 may be supplied through the municipal water network, the water supply pressure of the municipal water network is relatively high for this system and there are pressure fluctuations. If the municipal water network is used directly, under long-term use, the internal pipes of this system are prone to leakage due to water pressure and water hammer effect. The fluctuating water pressure can also affect the accuracy of heating and temperature control. Therefore, it is necessary to reduce the inlet water pressure through the pressure reducing valve 121 to provide a stable inlet water pressure, avoid system fluctuations, and maintain the stability of system operation. In addition, when the water in the preheating water tank 6 is drained, the water supply valve can be opened to replenish water in time through the third branch 122.

[0027] Based on the above technical solution, a negative pressure valve 123 is also provided at the front end of the first water pump 2. The negative pressure valve 123 is a valve with a purely physical structure. The negative pressure valve 123 can ensure that the negative pressure valve 123 will only open to allow water to enter when the suction of the first water pump 2 causes a negative pressure to be generated between the inlet of the first water pump 2 and the negative pressure valve 123 during the operation of the first water pump 2. Moreover, the opening degree of the negative pressure valve 123 is linearly proportional to the pressure value. The greater the pressure, the greater the water flow.

[0028] Based on the above technical solution, the connection point between the first branch 12 and the second branch 9 is located at the front end or rear end of the first water pump 2. like Figure 2 As shown, when the connection point is at the front end of the first water pump 2, the second branch 9 is provided with a second solenoid valve 91, the first branch 2 is provided with a first solenoid valve 124, and the first solenoid valve 124 is located between the negative pressure valve 123 and the connection point. The second solenoid valve 91 and the first solenoid valve 124 are interlocked, which can ensure that only one of the first solenoid valve 124 and the second solenoid valve 91 can be opened at the same time, thus ensuring the stability of the water supply temperature. like Figure 1 As shown, when the connection point is at the rear end of the first water pump 2, a second water pump 91 is provided on the second branch 9, and the second water pump 91 serves as the power source for the second branch 9. Both the first water pump 2 and the second water pump 91 are DC motors. The speed of the DC motor can be adjusted by adjusting the working voltage, thereby adjusting the water flow rate of the pump. The above two structures are for controlling whether the preheated water in the preheating tank 6 enters the heater 3.

[0029] Based on the above technical solution, the heater 3 is equipped with a flow meter 10 at its front end and a second temperature sensor 31 inside the heater 3. The flow meter 10 and the second temperature sensor 31 detect the temperature and flow rate of the water flow. Combined with the heat calculation formula mentioned above, the water flow rate is used as the control variable to achieve the purpose of water temperature regulation.

[0030] This utility model also provides a water dispenser, including: Drinking water supply system as described in any of the above; The purification system is connected to the inlet of the water inlet pipe 1.

[0031] Improving the cleanliness of drinking water supply systems through purification systems can reduce scaling rates and extend the lifespan of the systems. Purification systems typically include multiple filters; when these filters include reverse osmosis filters, the system also includes a water pump to circulate the water.

[0032] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification. In the description of this specification, references to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A drinking water supply system, characterized in that, include: The water inlet pipeline includes a normal temperature water pipeline and a first branch line connected in parallel, and the normal temperature water pipeline is equipped with an on / off solenoid valve; The first water pump is located on the first branch line; The heater is connected to the outlet of the first branch. A hot water pipe, one end of which is connected to the outlet of the heater; The faucet is connected to both the ambient temperature water pipe and the hot water pipe. The preheating water tank has a return hot water pipe at its inlet, which is connected to the hot water pipe through a reversing valve. Its outlet has a second branch, which is connected to the first branch. The preheating water tank is equipped with an insulation layer.

2. The drinking water supply system according to claim 1, characterized in that, The preheating water tank is also equipped with high and low liquid level sensors, a first temperature sensor and a heat preservation heater. The top of the preheating water tank is also equipped with an exhaust pipe, which is connected to the water tap.

3. The drinking water supply system according to claim 2, characterized in that, The first branch is also equipped with a pressure reducing valve, and the rear end of the pressure reducing valve is equipped with a third branch, which is connected to the preheating water tank; A water supply valve is installed on the third branch.

4. The drinking water supply system according to claim 3, characterized in that, A negative pressure valve is also provided at the front end of the first water pump.

5. The drinking water supply system according to claim 4, characterized in that, The connection point between the first branch and the second branch is located at the front or rear end of the first water pump; When the connection point is at the front end of the first water pump, a second solenoid valve is provided on the second branch, and a first solenoid valve is provided on the first branch. The first solenoid valve is located between the negative pressure valve and the connection point. The second solenoid valve is interlocked with the first solenoid valve; When the connection point is at the rear end of the first water pump, a second water pump is provided on the second branch; Both the first and second water pumps are DC motors.

6. The drinking water supply system according to claim 5, characterized in that, A flow meter is installed at the front end of the heater, and a second temperature sensor is installed inside the heater.

7. A water dispenser, characterized in that, include: The drinking water supply system as described in any one of claims 1 to 6; The purification system is connected to the inlet of the water inlet pipe.

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