Direct drinking water heater

Abstract

The utility model relates to a direct drinking water heater which comprises a water container, a heat exchanger, a cold water pipe and a warm water pipe. The water container is a closed container body, a heating device is arranged at the bottom in the water container, a cold water leading-in pipe is arranged on the side wall, and a boiled water leading-out pipe is arranged at the top and provided with a first switch branch pipe and a second boiled water branch pipe. The inner diameter of an outer pipe of the heat exchanger is larger than the outer diameter of an inner pipe, the water inlet end of a cold water pipe communicates with a municipal tap water pipe, the water outlet end communicates with the outer pipe at the first end of the heat exchanger, and the outer pipe at the second end of the heat exchanger communicates with the water inlet end of a cold water ingress pipe. The water inlet end of the warm water pipe is communicated with the inner pipe at the second end of the heat exchanger; the inner pipe at the first end of the heat exchanger is communicated with the water outlet end of the second boiled water branch pipe; more than two warm water branch pipes are arranged at the water outlet end of the warm water pipe, the inner diameter of each warm water branch pipe is smaller than that of the warm water pipe, and the ratio of the sum of the inner diameters of all the warm water branch pipes to the inner diameter of the warm water pipe is not larger than 5: 3. According to the utility model, a plurality of warm water faucets can obtain more stable water yield at the same time.

Description

Technical Field

[0001] The utility model relates to a structural improvement of a direct drinking water hot water machine. Background Art

[0002] Traditional direct drinking hot water machines generally install multiple warm water faucets directly in an axial arrangement on the warm water outlet pipe. When in use, if multiple warm water faucets are opened at the same time to draw water, the warm water faucet near the water inlet end will seriously affect the water output of the warm water faucet near the water outlet end. Specifically, the warm water faucet near the water inlet end outputs a large amount of water, while the warm water faucet near the water outlet end outputs a small amount of water or even no water. Utility Model Content

[0003] The utility model aims to improve the above-mentioned deficiencies of the existing direct drinking water hot water machine.

[0004] The utility model adopts the following technical solutions:

[0005] A direct drinking water hot water machine comprises a water tank, a heat exchanger, a cold water pipe and a warm water pipe; the water tank is a closed tank body and a heating device is arranged at the inner bottom, a cold water inlet pipe is arranged at the lower part of the side wall, and a hot water outlet pipe is arranged at the top, the water outlet end of the hot water outlet pipe is exposed above the water tank and is provided with a first switch branch pipe and a second hot water branch pipe; the heat exchanger is composed of an inner pipe and an outer pipe, and the inner diameter of the outer pipe is larger than the outer diameter of the inner pipe, so that the inner pipe forms a hot water channel, the outer pipe forms a cold water channel, the water inlet end of the cold water pipe is connected to the municipal tap water pipe, the water outlet end of the cold water pipe is connected to the municipal tap water pipe, and the water outlet end of the cold water pipe is connected to the municipal tap water pipe. The first end of the heat exchanger is connected to an outer tube at the first end of the heat exchanger, and the second end of the heat exchanger is connected to the water inlet end of the cold water inlet pipe; the water inlet end of the warm water pipe is connected to the inner tube at the second end of the heat exchanger, and the inner tube at the first end of the heat exchanger is connected to the water outlet end of the second hot water branch; the water outlet end of the warm water pipe is closely and radially provided with two or more warm water branches, and the water outlet end of each hot water branch is provided with a warm water faucet, the inner diameter of the warm water branch is smaller than the inner diameter of the hot water pipe, and the ratio of the sum of the inner diameters of all the hot water branches to the inner diameter of the warm water pipe is not greater than 5:3.

[0006] As a preferred solution, the inner diameters of the warm water pipe and the second boiled water branch are not less than the inner diameter of the inner pipe of the heat exchanger.

[0007] As a preferred solution, the warm water pipe is U-shaped and its U bottom section is vertically arranged so that its water outlet is at the top and the water inlet is at the bottom. The water outlet of the warm water pipe is horizontally divided into two or more warm water branches in close proximity, and each warm water branch has a warm water faucet at the water outlet.

[0008] As a preferred solution, two to six warm water branch pipes are provided on the warm water pipe, the inner diameter of the warm water pipe is 18 mm, and the inner diameter of each warm water branch pipe is 5 mm.

[0009] As a preferred solution, the outer diameter of the inner tube is 15 mm and the inner diameter is 13.5 mm, the inner diameter of the outer tube is 23.5 mm and the length is 4-4.6 meters. The length of the inner tube is greater than that of the outer tube and both ends of the inner tube are exposed outside the outer tube.

[0010] As a preferred solution, a water level probe for monitoring whether the water is full is provided on the top of the water bladder, and a water temperature probe for monitoring the water temperature inside the water bladder is provided on the side wall.

[0011] As a preferred solution, the second boiled water branch is provided with a thermostatic valve for controlling its water output.

[0012] As a preferred solution, the cold water inlet pipe is provided with a one-way water inlet valve for preventing the water in the water tank from flowing back.

[0013] As a preferred solution, the cold water pipe is provided with a first solenoid valve, the hot water faucet is provided with a second solenoid valve, and the warm water faucet is provided with a third solenoid valve.

[0014] The utility model arranges a plurality of warm water branches which are thinner than the warm water pipes at the water outlet end of the warm water pipes, and arranges a warm water faucet on each of the warm water branches, and arranges a solenoid valve on each of the warm water faucets. By matching the inner diameter ratio of the warm water pipes and the warm water branches and with the aid of water pressure, a plurality of warm water faucets can simultaneously obtain a relatively stable water output. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment with two warm water taps;

[0016] Figure 2 It is a schematic diagram of the water outlet structure of an embodiment with three warm water taps;

[0017] Figure 3 It is a schematic diagram of the water outlet structure of an embodiment with four warm water faucets;

[0018] Figure 4 The figure is a schematic diagram of the water outlet structure of an embodiment with five warm water faucets. DETAILED DESCRIPTION

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-4 As shown:

[0021] A direct drinking water hot water machine comprises a water tank 1, a heat exchanger 2, a cold water pipe 3 and a warm water pipe 4.

[0022] The water tank 1 is a closed tank body with a heating device at the inner bottom, a cold water inlet pipe 5 at the lower part of the side wall, and a boiling water outlet pipe 6 at the top. The water inlet end of the boiling water outlet pipe 6 extends into the water tank 1, and the water outlet end is exposed above the water tank 1 and is provided with a first switch branch 7 and a second boiling water branch 8. The water outlet end of the first boiling water branch 7 is provided with a boiling water faucet 9.

[0023] The heat exchanger 2 is composed of an inner tube 2.1 and an outer tube 2.2, and the inner diameter of the outer tube 2.2 is larger than the outer diameter of the inner tube 2.1, so that the inner tube 2.1 forms a hot water channel and the outer tube 2.2 forms a cold water channel. The length of the inner tube 2.1 is larger than the length of the outer tube 2.2, and both ends of the inner tube 2.1 are exposed to both ends of the outer tube 2.2.

[0024] The water inlet end of the cold water pipe 3 is connected to the municipal water pipe, and the water outlet end is connected to the outer pipe 2.2 at the first end of the heat exchanger 2. The outer pipe 2.2 at the second end of the heat exchanger 2 is connected to the water inlet end of the cold water introduction pipe 2.

[0025] The water inlet end of the warm water pipe 4 is connected to the inner pipe 2 . 1 at the second end of the heat exchanger 2 , and the inner pipe 2 . 1 at the first end of the heat exchanger 2 is connected to the water outlet end of the second boiled water branch 8 .

[0026] The hot water pipe 4 is U-shaped and its U bottom section is vertically arranged so that its water outlet is at the top and the water inlet is at the bottom. The water outlet of the hot water pipe 4 is horizontally divided into two or more hot water branches 10 in close proximity, and each hot water branch 10 is provided with a hot water faucet 11 at the water outlet.

[0027] The inner diameters of the warm water pipe 4 and the second boiled water branch 8 are not less than the inner diameter of the inner pipe 2.1 of the heat exchanger 2, the inner diameter of the warm water branch 11 is smaller than the inner diameter of the warm water pipe 4, and the ratio of the sum of the inner diameters of all the warm water branches 10 to the inner diameter of the warm water pipe 4 is not greater than 5:3, so that all the warm water taps 11 can discharge water evenly after being opened.

[0028] As a special case, the inner diameter of the warm water pipe 4 is set to 18mm, and six warm water manifolds 10 with an inner diameter of 5mm are arranged on the warm water pipe 4, the outer diameter of the inner pipe 2.1 is set to 15mm, the inner diameter is set to 13.5mm, and the inner diameter of the outer pipe 2.2 is set to 23.5mm and the length is set to 4-4.6 meters. It can basically ensure that after the six warm water taps 11 are opened at the same time, the six warm water manifolds 11 can all discharge water evenly, and at the same time, the cold water flowing through the outer pipe 2.2 can cool the boiling water flowing through the inner pipe 2.1 faster and for a longer time, so as to widen the cooling speed of the boiling water and increase the cooling range of the boiling water. Of course, in this special case, two to five warm water manifolds 10 can also be arranged on the warm water pipe 4, and the water discharge effect will be better.

[0029] The two ends of the inner tube 2.1 of the heat exchanger 2, the water inlet end of the warm water pipe 4 and the water outlet end of the second boiled water branch 8 are fixedly connected to each other, and a thermostatic valve 12 for controlling the water outlet is provided on the second switch branch 8 at the connection.

[0030] A water level probe 13 for monitoring whether the water tank 1 is full of water is provided on the top, a water temperature probe 14 for monitoring the water temperature inside the water tank 1 is provided on the side wall, a one-way water inlet valve 15 for preventing the water in the water tank 1 from flowing back is provided on the cold water inlet pipe 6, a first solenoid valve 16 is provided on the cold water pipe 3, a second solenoid valve 17 is provided on the water tap 9, and a third solenoid valve 18 is provided on each warm water tap 11; the heating device, the water level probe 13, the water temperature probe 14, the first solenoid valve 16, the second solenoid valve 17 and the third solenoid valve 18 are all electrically connected to the controller.

[0031] When in use, tap water can enter the water tank 1 along the cold water pipe 3, the outer pipe 2.2 of the heat exchanger 2, and the cold water inlet pipe 5. After the water level probe 13 senses that the water is full, the cold water pipe 3 can be closed by the first electromagnetic valve 16. At this time, the internal water pressure of the water tank 1 is the same as the municipal water pressure of the tap water pipe, which is about 0.2Mpa. After the water is full, the heating device can be started to heat the water in the water tank 1 to the set boiling water temperature. After the water temperature probe 14 senses that the water is boiling, the heating device can be switched to the insulation working state through the controller. At this time, the water pressure in the water tank 1 will be higher than the municipal water pressure.

[0032] If boiled water is needed, the second solenoid valve 17 can be opened by the controller, and the boiled water in the water tank 1 can flow out along the boiled water outlet pipe 6, the first boiled water branch 7 and the boiled water tap 9 in sequence.

[0033] If warm water is needed, one or more or all of the third solenoid valves 18 are opened by the controller, and the boiled water in the water tank 1 can enter the inner tube 2.1 of the heat exchanger 2 along the boiled water outlet pipe 6 and the second boiled water branch 8 in sequence. At the same time, the first solenoid valve 16 can be opened by the controller, and tap water can enter the outer tube 2.2 of the heat exchanger 2 along the cold water pipe 3. The boiled water flowing through the inner tube 2.1 and the cold water flowing through the outer tube 2.2 are heat exchanged to form warm water, and the warm water flows out along the warm water pipe 4 and the corresponding warm water branch 10 and the warm water faucet 11. The cold water that completes the heat exchange is replenished into the water tank 1.

[0034] If the water temperature in the water tank 1 drops to the set minimum boiling water temperature, the second solenoid valve 17 and the third solenoid valve 18 can be closed by the controller, so that the boiling water tap 9 and all warm water taps 11 do not discharge water, and then the second battery valve 17 can be opened to replenish water to the water tank 1, and the heating device can be restarted to boil water.

Claims

1. A direct drinking water hot water machine, comprising a water tank, a heat exchanger, a cold water pipe and a warm water pipe; the water tank is a closed tank body and is provided with a heating device at the inner bottom, a cold water inlet pipe at the lower part of the side wall, and a boiled water outlet pipe at the top, the water outlet end of the boiled water outlet pipe is exposed above the water tank and is provided with a first switch branch and a second boiled water branch; the heat exchanger is composed of an inner tube and an outer tube and the inner diameter of the outer tube is larger than the outer diameter of the inner tube, so that the inner tube forms a boiled water channel and the outer tube forms a cold water channel, the water inlet end of the cold water pipe is connected to the municipal tap water pipe, the water outlet end is connected to the outer tube at the first end of the heat exchanger, and the outer tube at the second end of the heat exchanger is connected to the water inlet end of the cold water inlet pipe; the water inlet end of the warm water pipe is connected to the inner tube at the second end of the heat exchanger, and the inner tube at the first end of the heat exchanger is connected to the water outlet end of the second boiled water branch; it is characterized in that: The water outlet of the hot water pipe is provided with two or more hot water branches in close proximity and radially, each hot water branch is provided with a hot water faucet at the water outlet, the inner diameter of the hot water branch is smaller than the inner diameter of the hot water pipe, and the ratio of the sum of the inner diameters of all the hot water branches to the inner diameter of the hot water pipe is not greater than 5:

3.

2. A direct drinking water machine according to claim 1, characterized in that: The inner diameters of the warm water pipe and the second boiled water branch shall not be less than the inner diameter of the inner pipe of the heat exchanger.

3. A direct drinking water machine according to claim 1, characterized in that: The hot water pipe is U-shaped and its U bottom section is vertically arranged so that its water outlet is at the top and the water inlet is at the bottom. The water outlet of the hot water pipe is horizontally divided into two or more hot water branches in close proximity, and the water outlet of each hot water branch is provided with a hot water faucet.

4. A direct drinking water machine according to claim 3, characterized in that: Two to six warm water branch pipes are arranged on the warm water pipe, the inner diameter of the warm water pipe is 18 mm, and the inner diameter of each warm water branch pipe is 5 mm.

5. A direct drinking water machine according to claim 4, characterized in that: The outer diameter of the inner tube is 15 mm and the inner diameter is 13.5 mm. The inner diameter of the outer tube is 23.5 mm and the length is 4-4.6 meters. The length of the inner tube is greater than the length of the outer tube and both ends of the inner tube are exposed outside the two ends of the outer tube.

6. A direct drinking water machine according to claim 1, characterized in that: A water level probe for monitoring whether the water is full is arranged on the top of the water liner, and a water temperature probe for monitoring the water temperature inside the water liner is arranged on the side wall.

7. A direct drinking water machine according to claim 1, characterized in that: The second boiled water branch is provided with a temperature regulating valve for controlling the water output thereof.

8. A direct drinking water machine according to claim 1, characterized in that: The cold water inlet pipe is provided with a one-way water inlet valve for preventing the water in the water tank from flowing back.

9. A direct drinking water machine according to claim 1, characterized in that: The cold water pipe is provided with a first solenoid valve, the hot water tap is provided with a second solenoid valve, and the warm water taps are all provided with a third solenoid valve.

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