Hot water outlet device

Abstract

A hot water outlet device provided by the present invention comprises: a first heating device; a domestic water pipeline, comprising a first domestic water branch section and a second domestic water branch section; a first on-off valve, arranged on the first domestic water branch section; a water storage tank, connected to the second domestic water branch section through the first pipeline; a negative pressure device, used to extract the air in the water storage tank so that the air pressure in the water storage tank is lower than the air pressure in the second domestic water branch section; a controller is used to control the first on-off valve to be disconnected and the negative pressure device to operate when the domestic water outlet stops discharging water, so that the air in the water storage tank is lower than the air pressure in the second domestic water branch section, and the water in the second domestic water branch section and the first domestic water branch section is extracted. When hot water is needed, the water in the cold water source passes through the first domestic water branch section and is heated by the first heating device, and then flows out through the second domestic water branch section. The water flowing out is hot water, and the user does not need to wait.

Description

Technical Field

[0001] The invention relates to the technical field of household electrical appliances, and in particular to a hot water outlet device. Background Art

[0002] Currently, the wall-mounted boilers on the market basically heat the water in the pipes through a burner, and then exchange heat with domestic water through a plate heat exchanger to meet the user's domestic water needs. However, when the machine is just turned on, a small amount of cold water will be discharged first before gradually reaching the user's required temperature, which will bring a bad experience to the user.

[0003] A zero cold water gas wall-mounted boiler system is disclosed in the prior art, including a gas wall-mounted boiler, a cold water pipe, a hot water pipe, a circulating water pump, a heating pump, a heating water outlet pipe, a heating return pipe, a water flow sensor, a water outlet temperature sensor and a controller. The cold water outlet end of the cold water pipe is connected to a plurality of cold water valves corresponding to the user and the cold water inlet of the circulating water pump; one end of the hot water pipe is connected to a plurality of hot water valves corresponding to the user, and the other end is connected to the hot water outlet of the gas wall-mounted boiler, and the end of the hot water pipe is connected to the cold water pipe. When the water temperature detected by the outlet water temperature sensor in the hot water pipe is lower than the starting temperature, the circulating water pump is controlled to start, the gas wall-mounted boiler works, the circulating water pump extracts the cold water in the cold water pipe and the hot water pipe, and the cold water in the hot water pipe connected to the cold water pipe is pumped into the wall-mounted boiler for heating, until the outlet water temperature sensor detects that the outlet water temperature is the starting temperature, the circulating water pump and the wall-mounted boiler stop working. When the user needs to use hot water, he needs to open the hot water valve first, then close the hot water valve, and then open the hot water valve after the outlet water temperature reaches the starting temperature.

[0004] Before using hot water, the user needs to wait for the water outlet temperature in the hot water pipe to reach the starting temperature before using the hot water normally, which is very inconvenient. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the wall-mounted boiler in the prior art that it is necessary to wait for a period of time when hot water is needed, thereby providing a hot water outlet device that does not require the user to wait.

[0006] In order to solve the above technical problems, the present invention provides a hot water outlet device, comprising:

[0007] a first heating device;

[0008] A domestic water pipeline having a domestic water inlet and a domestic water outlet, including a first domestic water branch section located between the first heating device and the domestic water inlet, and a second domestic water branch section located between the domestic water outlet and the first heating device, wherein the domestic water inlet is connected to a cold water source;

[0009] A first on-off valve, provided on the first domestic water branch section;

[0010] a water storage tank, connected to the second domestic water branch section through a first pipeline;

[0011] A negative pressure device, used to extract the air in the water storage tank so that the air pressure in the water storage tank is lower than the air pressure in the second domestic water branch section;

[0012] The controller is electrically connected to the first on-off valve and the negative pressure device respectively, and is used to control the first on-off valve to be disconnected and control the negative pressure device to operate when the domestic water outlet stops discharging water.

[0013] The negative pressure device is an exhaust device.

[0014] A second on-off valve is provided between the first pipeline and the water tank, and the second on-off valve is electrically connected to the controller.

[0015] A third on-off valve is provided between the negative pressure device and the water storage tank, and the third on-off valve is electrically connected to the controller.

[0016] The water storage tank is provided with a drain outlet, and the drain outlet is connected with the domestic water outlet through a second pipeline.

[0017] The second pipeline is also connected to the cold water source through a third pipeline. The second pipeline and the third pipeline are connected through a three-way valve. The three-way valve has a first position that connects the water storage tank with the domestic water outlet, and a second position that connects the third pipeline with the domestic water outlet.

[0018] The three-way valve is electrically connected to the controller. A liquid level detector is provided in the water tank. The liquid level detector is used to detect and send real-time liquid level information to the controller. The controller is used to receive the real-time liquid level information, and compare the real-time liquid level with the preset liquid level. When the real-time liquid level is higher than the preset liquid level, the three-way valve is controlled to switch to the first position. When the real-time liquid level is lower than the preset liquid level, the three-way valve is controlled to switch to the second position.

[0019] A temperature measuring device is provided on the second domestic water branch section near the domestic water outlet, and the temperature measuring device is electrically connected to the controller.

[0020] The hot water outlet device further comprises a heating circulation pipeline and a second temperature increasing device. The heating circulation pipeline has a heating return water port and a heating water outlet. The heating circulation pipeline comprises:

[0021] The heated section is heated by the second temperature increasing device;

[0022] A first heating branch section is provided between the heated section and the heating water return port;

[0023] The second heating branch section is arranged between the heated section and the heating water outlet.

[0024] The first heating device is a plate heat exchanger, a heat exchange pipeline is connected between the second heating branch section and the first heating branch section, the plate heat exchanger is arranged on the heat exchange pipeline, and the domestic water pipeline is heated in the plate heat exchanger.

[0025] The second temperature increasing device is a burner.

[0026] The technical solution of the present invention has the following advantages:

[0027] 1. The present invention provides a hot water outlet device. When the domestic water outlet stops discharging water, the first on-off valve is controlled to be disconnected, and the negative pressure device is operated to pump out the air in the water tank. The air pressure in the water tank is lower than the air pressure in the second domestic water branch section. The water in the second domestic water branch section and the first domestic water branch section is pumped out. When hot water is needed, the first on-off valve is opened, and the water in the cold water source passes through the first domestic water branch section and is heated by the first heating device, and then flows out through the second domestic water branch section. The water flowing out is hot water, and the user does not need to wait.

[0028] 2. The present invention provides a hot water outlet device, wherein a second on-off valve is provided between the first pipeline and the water storage tank, and the second on-off valve is electrically connected to the controller. When the user uses hot water, the user controls the second on-off valve to disconnect to prevent hot water from entering the water tank.

[0029] 3. The present invention provides a hot water outlet device, wherein a third on-off valve is provided between the negative pressure device and the water storage tank, and the third on-off valve is electrically connected to the controller. When using hot water, the user controls the third on-off valve to disconnect to prevent the negative pressure device from working all the time and pumping hot water into the water tank.

[0030] 4. The present invention provides a hot water outlet device, wherein the water tank is provided with a drain outlet, and the drain outlet is connected to the domestic water outlet through a second pipeline. The cold water in the water tank can be mixed with the hot water and flow out through the domestic water outlet, or when the user needs to use cold water, the water in the water tank can be used, which can save water resources and avoid waste of water resources.

[0031] 5. The present invention provides a hot water outlet device, wherein the second pipeline is also connected to the cold water source through a third pipeline, and the second pipeline and the third pipeline are connected through a three-way valve, and the three-way valve has a first position for connecting the water storage tank with the domestic water outlet, and a second position for connecting the third pipeline with the domestic water outlet. When the user needs to use cold water or needs a mixture of cold water and hot water, the water in the water storage tank or the water from the cold water source can be used.

[0032] 6. The present invention provides a hot water outlet device, wherein the three-way valve is electrically connected to the controller, a liquid level detector is provided in the water tank, the liquid level detector is used to detect and send real-time liquid level information to the controller, the controller is used to receive the real-time liquid level information, and compare the real-time liquid level with the preset liquid level, and when the real-time liquid level is higher than the preset liquid level, the three-way valve is controlled to switch to the first position, and when the real-time liquid level is lower than the preset liquid level, the three-way valve is controlled to switch to the second position. With this arrangement, when cold water is needed, the water in the water tank is used preferentially, which is beneficial to saving water resources and avoiding waste of water resources.

[0033] 7. The present invention provides a hot water outlet device, wherein a temperature measuring device is provided on the second domestic water branch section near the domestic water outlet, and the temperature measuring device is electrically connected to the controller. The temperature measuring device can measure the water temperature on the second domestic water branch section near the domestic water outlet at any time. When the user is not using hot water, when the water temperature measured by the temperature measuring device is lower than the preset temperature, the controller controls the negative pressure device to operate so that the water in the second domestic water branch section is pumped out. At the same time, when hot water is used and the water temperature is low, the controller can control the working power of the first heating device and adjust it at any time to ensure that the water temperature meets the user's needs.

[0034] 8. The present invention provides a hot water outlet device, which also includes a heating circulation pipeline and a second heating device. The heating circulation pipeline has a heating return water port and a heating outlet. The heating circulation pipeline includes: a heated section, which is heated by the second heating device; a first heating branch section, which is arranged between the heated section and the heating return water port; and a second heating branch section, which is arranged between the heated section and the heating outlet. The hot water outlet device can meet the needs of heating and domestic hot water at the same time.

[0035] 9. The present invention provides a hot water outlet device, wherein the first heating device is a plate heat exchanger, a heat exchange pipeline is connected between the second heating branch section and the first heating branch section, the plate heat exchanger is arranged on the heat exchange pipeline, the domestic water pipeline is heated in the plate heat exchanger, and the plate heat exchanger is used to exchange heat for domestic water. The water temperature after heat exchange is comfortable, convenient for human use, and more energy-efficient.

[0036] 10. In the hot water outlet device provided by the present invention, the second temperature increasing device is a burner, the burner has high power, can heat quickly, and is conducive to saving electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a structural schematic diagram of a hot water outlet device provided in an embodiment of the present invention;

[0039] Description of reference numerals:

[0040] 1-plate heat exchanger; 2-domestic water outlet; 3-first domestic water branch; 4-second domestic water branch; 5-cold water source; 6-first on-off valve; 7-water storage tank; 8-first pipeline; 9-exhaust device; 10-second on-off valve; 11-third on-off valve; 12-second pipeline; 13-third pipeline; 14-three-way valve; 15-temperature measuring device; 16-liquid level detector; 17-first heating branch; 18-second heating branch; 19-main heat exchanger; 20-burner. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] This embodiment provides a specific implementation of a hot water outlet device. In this implementation, the hot water outlet device is a wall-mounted boiler, which includes: a first heating device, a domestic water pipeline, a first on-off valve 6, a water storage tank 7, a negative pressure device, a heating circulation pipeline, and a second heating device.

[0047] In this embodiment, the first temperature increasing device is used to heat the domestic water. Specifically, the first temperature increasing device is a plate heat exchanger 1 .

[0048] The domestic water pipeline has a domestic water inlet and a domestic water outlet 2, including a first domestic water branch section 3 located between the first heating device and the domestic water inlet, and a second domestic water branch section 4 located between the domestic water outlet 2 and the first heating device. The domestic water inlet is connected to a cold water source 5.

[0049] The first on-off valve 6 is provided on the first domestic water branch section 3. When the first on-off valve 6 is disconnected, the water from the cold water source 5 cannot enter the domestic water pipeline. When the first on-off valve 6 is opened, the water from the cold water source 5 can enter the domestic water pipeline. Figure 1 As shown, the first on-off valve 6 is arranged on the first domestic water branch section 3 near the domestic water inlet. Of course, in other replaceable embodiments, the first on-off valve 6 can be arranged on the first domestic water branch section 3 near the first heating device.

[0050] The water tank 7 is connected to the second life water branch section 4 through the first pipeline 8, and a second on-off valve 10 is provided between the first pipeline 8 and the water tank 7; the negative pressure device is used to extract the air in the water tank 7 so that the air pressure in the water tank 7 is lower than the air pressure in the second life water branch section 4. In this embodiment, the negative pressure device is an exhaust device 9, and a third on-off valve 11 is provided between the negative pressure device and the water tank 7.

[0051] The controller is electrically connected to the first on-off valve 6, the negative pressure device, the second on-off valve 10, and the third on-off valve 11, respectively, and is used to control the first on-off valve 6 to be opened, the second on-off valve 10 to be opened, and the third on-off valve 11 to be opened when the domestic water outlet 2 stops discharging water, and to control the operation of the negative pressure device; when domestic hot water is needed, the first on-off valve 6 is controlled to be opened, the second on-off valve 10 to be disconnected, and the third on-off valve 11 to be disconnected.

[0052] The water storage tank 7 is provided with a drain outlet, which is connected to the domestic water outlet 2 through a second pipeline 12 .

[0053] The second pipeline 12 is also connected to the cold water source 5 through the third pipeline 13. The second pipeline 12 and the third pipeline 13 are connected through a three-way valve 14. The three-way valve 14 has a first position that connects the water tank 7 with the domestic water outlet 2, and a second position that connects the third pipeline 13 with the domestic water outlet 2.

[0054] The three-way valve 14 is electrically connected to the controller, and a liquid level detector 16 is provided in the water tank 7. The liquid level detector 16 is used to detect and send real-time liquid level information to the controller. The controller is used to receive the real-time liquid level information, and compare the real-time liquid level with the preset liquid level. When the real-time liquid level is higher than the preset liquid level, the three-way valve 14 is controlled to switch to the first position, and when the real-time liquid level is lower than the preset liquid level, the three-way valve 14 is controlled to switch to the second position. With this arrangement, when cold water is needed, the water in the water tank 7 is used first, which is conducive to saving water resources and avoiding waste of water resources. In this embodiment, the preset liquid level is the position at the bottom of the water tank 7, that is, when there is water in the water tank 7, the water in the water tank 7 is used first.

[0055] A temperature measuring device 15 is provided near the domestic water outlet 2 on the second domestic water branch section 4, and the temperature measuring device 15 is electrically connected to the controller. The temperature measuring device 15 can measure the water temperature near the domestic water outlet 2 on the second domestic water branch section 4 at any time, and send real-time temperature information to the controller. When the user is not using hot water, the controller is used to receive real-time temperature information and compare the actual temperature with the preset temperature. When the water temperature measured by the temperature measuring device 15 is lower than the preset temperature, the controller controls the negative pressure device to work, so that the water in the second domestic water branch section 4 is pumped out. At the same time, when the water temperature is low during the use of hot water, the controller can control the working power of the first heating device and adjust it at any time to ensure that the water temperature meets the needs of the user.

[0056] The heating circulation pipeline has a heating return water inlet and a heating water outlet, and the heating circulation pipeline includes: a heated section, a first heating branch section 17, and a second heating branch section 18, wherein the heated section is heated by the second heating device, the first heating branch section 17 is arranged between the heated section and the heating return water inlet, and the second heating branch section 18 is arranged between the heated section and the heating water outlet. A heat exchange pipeline is connected between the second heating branch section 18 and the first heating branch section 17, the plate heat exchanger 1 is arranged on the heat exchange pipeline, and the domestic water pipeline is heated in the plate heat exchanger 1.

[0057] Preferably, the second temperature increasing device is a burner 20. Of course, in other alternative embodiments, the second temperature increasing device may be an electric heater.

[0058] When the hot water outlet device is in use, the circulating water in the heating circulation pipeline is continuously circulated under the action of the water pump, enters the heated section through the first heating branch section 17, the heated section runs through the main heat exchanger 19, the main heat exchanger 19 is continuously heated by the burner 20, the heated section exchanges heat with the main heat exchanger 19, the circulating water is heated and the temperature is increased, part of the heated circulating water flows to the heating end through the heating outlet, and part enters the heat exchange pipeline, heats the domestic water in the plate heat exchanger 1, and the domestic water outlet 2 can flow out domestic hot water. When the domestic water outlet 2 stops discharging water, the controller controls the first on-off valve 6 to be disconnected, the second on-off valve 10 to be opened, and the third on-off valve 11 to be opened, and controls the negative pressure device to work. In addition, the air pressure in the water tank is lower than the air pressure in the second domestic water branch section 4, and the water in the second domestic water branch section 4 and the first domestic water branch section 3 flows into the water storage tank 7. Due to the setting of the first on-off valve 6, the water from the cold water source 5 cannot flow into the water storage tank 7; when domestic hot water is needed, the first on-off valve 6 is controlled to be opened, and the water from the cold water source 5 flows through the first domestic water branch section 3, and after heat exchange and temperature rise in the plate heat exchanger 1, it flows out through the second domestic water branch section 4. The water flowing out is hot water, and the user does not need to wait.

[0059] As a first alternative embodiment of the above embodiment, the hot water outlet device may be an electric water heater or a gas water heater, and correspondingly, the first temperature increasing device may be an electric heating device or a gas heating device.

[0060] As a second alternative embodiment of the above embodiment, the negative pressure device may be a suction device.

[0061] As a third replaceable embodiment of the above-mentioned embodiment, the second on-off valve 10 and the third on-off valve 11 may not be provided. When the domestic water outlet 2 stops discharging water, the first on-off valve 6 is controlled to be disconnected, and the negative pressure device is controlled to operate. When domestic hot water is needed, the first on-off valve 6 is controlled to be opened, and the negative pressure device is controlled to stop operating.

[0062] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A hot water outlet device, characterized in that: include: a first heating device; A domestic water pipeline having a domestic water inlet and a domestic water outlet (2), comprising a first domestic water branch section (3) located between the first heating device and the domestic water inlet, and a second domestic water branch section (4) located between the domestic water outlet (2) and the first heating device, wherein the domestic water inlet is connected to a cold water source (5); A first on-off valve (6) is provided on the first domestic water branch section (3); A water storage tank (7) is connected to the second domestic water branch section (4) via a first pipeline (8); the water storage tank (7) is provided with a drain outlet, the drain outlet is connected to the domestic water outlet (2) via a second pipeline (12); the second pipeline (12) is also connected to the cold water source (5) via a third pipeline (13); a negative pressure device, used for extracting air from the water storage tank (7) so that the air pressure in the water storage tank (7) is lower than the air pressure in the second domestic water branch section (4); the negative pressure device is an exhaust device (9); a third on-off valve (11) is provided between the negative pressure device and the water storage tank (7); A controller is electrically connected to the first on-off valve (6) and the negative pressure device, respectively, and is used to control the first on-off valve (6) to disconnect and control the negative pressure device to operate when the domestic water outlet (2) stops discharging water. The third on-off valve (11) is electrically connected to the controller.

2. The hot water outlet device according to claim 1, characterized in that: A second on-off valve (10) is provided between the first pipeline (8) and the water storage tank (7), and the second on-off valve (10) is electrically connected to the controller.

3. The hot water outlet device according to claim 1, characterized in that: The second pipeline (12) and the third pipeline (13) are connected via a three-way valve (14); the three-way valve (14) has a first position for connecting the water storage tank (7) to the domestic water outlet (2), and a second position for connecting the third pipeline (13) to the domestic water outlet (2).

4. The hot water outlet device according to claim 3, characterized in that: The three-way valve (14) is electrically connected to the controller. A liquid level detector (16) is provided in the water tank (7). The liquid level detector (16) is used to detect and send real-time liquid level information to the controller. The controller is used to receive the real-time liquid level information and compare the real-time liquid level with a preset liquid level. When the real-time liquid level is higher than the preset liquid level, the three-way valve (14) is controlled to switch to the first position. When the real-time liquid level is lower than the preset liquid level, the three-way valve (14) is controlled to switch to the second position.

5. The hot water outlet device according to claim 1, characterized in that: A temperature measuring device (15) is provided on the second domestic water branch section (4) near the domestic water outlet (2), and the temperature measuring device (15) is electrically connected to the controller.

6. The hot water outlet device according to claim 1, characterized in that: The hot water outlet device further comprises a heating circulation pipeline and a second temperature increasing device. The heating circulation pipeline has a heating return water port and a heating water outlet. The heating circulation pipeline comprises: The heated section is heated by the second temperature increasing device; A first heating branch section (17) is provided between the heated section and the heating water return port; The second heating branch section (18) is arranged between the heated section and the heating water outlet.

7. The hot water outlet device according to claim 6, characterized in that: The first temperature-increasing device is a plate heat exchanger (1), a heat exchange pipeline is connected between the second heating branch section (18) and the first heating branch section (17), the plate heat exchanger (1) is arranged on the heat exchange pipeline, and the domestic water pipeline is heated in the plate heat exchanger (1).

8. The hot water outlet device according to claim 6, characterized in that: The second temperature increasing device is a burner (20).

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