A partitioned energy-saving hot water tank

Abstract

The present invention discloses a partitioned energy-saving hot water tank, which includes a box body, a hot water supply branch pipe, a cold water replenishing pipe, an electric control valve, an electric control three-way valve and a controller; a hot water supply cavity and a cold water recovery cavity are formed in the box body, and the upper parts of the hot water supply cavity and the cold water recovery cavity are interconnected; an electric control valve is arranged on the hot water supply branch pipe, and the outlet of the hot water supply branch pipe is arranged above the cold water recovery cavity; a first water level detection device and a second water level detection device are respectively arranged in the cold water recovery cavity and the hot water supply cavity; the hot water end of the water-using equipment on the user side is connected to the hot water supply cavity through a pipeline; the bottom of the cold water recovery cavity is connected with a cold water outlet pipe, and the cold water outlet pipe, the cold water replenishing pipe and the cold water end of the water-using equipment on the user side are connected through an electric control three-way valve; the present invention has the characteristics of recovering the cold water in the water supply pipe section, reducing water and heat waste.

Description

Technical Field

[0001] The present invention relates to the field of hot water supply, and particularly to a partitioned energy-saving hot water tank. Background Art

[0002] With the continuous improvement of living standards and the requirements for energy conservation and environmental protection, the application of centralized (semi-centralized) hot water supply systems is becoming more and more common. By replacing the decentralized hot water supply method of electric water heaters with pure electric energy as the heat source, the application places of centralized and semi-centralized hot water supply systems are gradually spreading from traditional important public buildings, hotels, high-grade office buildings, etc. to apartments and residential houses. Therefore, improving the energy-saving and water-saving efficiency of centralized (semi-centralized) hot water supply systems is of great significance for the country's energy conservation and emission reduction.

[0003] As Figure 1 shown, the current typical hot water supply system mainly consists of a heat source 100, a total water tank 200, a hot water pump 300, a water supply pipe 400, a user-side water-using device 500, a circulation pipe 600, etc. Its operating principle is that the hot water in the total water tank 200 is transported by the hot water pump 300 through the hot water supply pipe 400 to each user-side water-using device 500; in order to ensure that the water temperature at the user-side water-using device 500 always meets the specification design requirements, a circulation pipe 600 is set up to form a circulation pipe network, so that the hot water can continuously circulate through the total water tank 200 to supplement the lost heat. However, in order to ensure that the supplied hot water temperature always meets the specification design requirements, the hot water needs to circulate continuously in the circulation pipe network for a long time, increasing the operating energy consumption of the hot water pump 300; in addition, due to the large outer surface area of the circulation pipe network, a large amount of heat loss is caused in the circulation pipe network. In order to reduce the loss of thermal energy and electric energy generated by hot water circulation, some users have adopted management measures of limiting use during peak water use periods, but this will cause serious inconvenience in water use.

[0004] As Figure 2 shown, in some small and medium-sized hot water supply projects, especially renovation projects, in order to reduce project costs and facilitate project construction, the circulation pipe 600 is cancelled, simplifying the circulation pipe network. Its operating principle is: the hot water in the total water tank 200 is transported by the hot water pump 300 through the water supply pipe 400 to each user-side water-using device 500. However, in order to ensure hot water supply, when hot water is intermittently used on the user side, it is often necessary to discharge the cold water in the water supply pipe section between the heat source and the hot water-using device, resulting in water and heat waste.

[0005] In view of this, the applicant of the present invention has conducted in-depth research on the above-mentioned defects in the prior art, and thus this case has arisen. Summary of the Invention

[0006] The main object of the present invention is to provide a partitioned energy-saving hot water tank, which has the characteristics of recovering the cold water in the water supply pipe section, reducing water and heat waste.

[0007] To achieve the above object, the solution of the present invention is as follows:

[0008] A separated energy-saving hot water tank, which includes a box body, a hot water supply branch pipe, a cold water replenishing pipe, an electric control valve, an electric control three-way valve and a controller; a hot water supply cavity and a cold water recovery cavity are formed in the box body, and the upper parts of the hot water supply cavity and the cold water recovery cavity are interconnected; an electric control valve is arranged on the hot water supply branch pipe, and the outlet of the hot water supply branch pipe is arranged above the cold water recovery cavity; a first water level detection device and a second water level detection device are respectively arranged in the cold water recovery cavity and the hot water supply cavity; the hot water end of the water-using equipment on the user side is connected to the hot water supply cavity through a pipeline; the bottom of the cold water recovery cavity is connected with a cold water outlet pipe, and the cold water outlet pipe, the cold water replenishing pipe and the cold water end of the water-using equipment on the user side are connected through an electric control three-way valve; the electric control valve, the electric control three-way valve, the first water level detection device and the second water level detection device are respectively electrically connected to the controller.

[0009] Further, the first water level detection device in the cold water recovery cavity includes a first water level detector arranged at the 1 / 5 water level of the cold water recovery cavity; the second water level detection device in the hot water supply cavity includes a second water level detector and a third water level detector respectively arranged at the 1 / 5 water level and the full water level of the hot water supply cavity.

[0010] Further, the second water level detection device further includes a fourth water level detector arranged at the 1 / 2 water level of the hot water supply cavity.

[0011] Further, the water-using equipment on the user side includes one or more of a faucet, a shower and a washing device.

[0012] Further, a heat preservation layer is arranged on the box body.

[0013] After adopting the above structure, a separated energy-saving hot water tank involved in the present invention has at least the following beneficial effects:

[0014] First, the hot water in the hot water supply cavity and the cold water in the cold water recovery cavity are respectively supplied to the water-using equipment on the user side through pipelines. The first water level detection device detects the water level in the cold water recovery cavity and transmits the detection result to the controller. When the water level in the cold water recovery cavity is lower than the set value, the controller controls the electric control three-way valve to connect the cold water replenishing pipe and the cold water end of the water-using equipment on the user side to ensure the continuous supply of cold water.

[0015] Second, the second water level detection device detects the hot water level in the hot water supply chamber. When the hot water level in the hot water supply chamber is lower than the set value, the controller opens the electric control valve, and the hot water supply branch pipe replenishes water. When replenishing water, the cold water generated by the natural heat dissipation of the pipe wall in the hot water supply branch pipe for a long time is injected into the cold water recovery chamber, and then the hot water supplied by the hot water supply branch pipe is injected into the hot water supply chamber by means of free overflow. After the replenishment of the hot water supply chamber is completed, the controller closes the electric control valve. In this way, the recovery of cold water in the hot water supply branch pipe is realized, avoiding the waste of water use and the waste of heat when waiting for hot water by discharging cold water in the traditional way. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 is a schematic structural diagram of an existing hot water supply system.

[0017] Figure 3 is a schematic structural diagram of a partitioned energy-saving hot water tank related to the present invention.

[0018] Figure 4 is a schematic structural diagram of using the partitioned energy-saving hot water tank.

[0019] In the figure:

[0020] Heat source 100; total water tank 200; hot water pump 300; water supply pipe 400; user-side water-using equipment 500; circulation pipe 600;

[0021] Box body 1; hot water supply chamber 11; cold water recovery chamber 12; heat insulation layer 13; hot water supply branch pipe 2; cold water replenishment pipe 3; electric control valve 4; electric control three-way valve 5; cold water outlet pipe 6; first water level detector 7; second water level detector 81; third water level detector 82; fourth water level detector 83; controller 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail below through specific embodiments.

[0023] Such as Figures 1 to 4As shown in the figure, the present invention relates to a partitioned energy-saving hot water tank, which includes a tank body 1, a hot water supply branch pipe 2, a cold water replenishing pipe 3, an electric control valve 4, an electric control three-way valve 5, and a controller 9. A hot water supply chamber 11 and a cold water recovery chamber 12 are formed in the tank body 1, and the upper parts of the hot water supply chamber 11 and the cold water recovery chamber 12 are interconnected. An electric control valve 4 is provided on the hot water supply branch pipe 2, and the outlet of the hot water supply branch pipe 2 is arranged above the cold water recovery chamber 12. A first water level detection device and a second water level detection device are respectively arranged in the cold water recovery chamber 12 and the hot water supply chamber 11. The hot water end of the user-side water-using device 500 is connected to the hot water supply chamber 11 through a pipeline. The bottom of the cold water recovery chamber 12 is connected to a cold water outlet pipe 6, and the cold water outlet pipe 6, the cold water replenishing pipe 3, and the cold water end of the user-side water-using device 500 are connected through the electric control three-way valve 5. The electric control valve 4, the electric control three-way valve 5, the first water level detection device, and the second water level detection device are respectively electrically connected to the controller 9.

[0024] In this way, for the partitioned energy-saving hot water tank of the present invention, the hot water in the hot water supply chamber 11 and the cold water in the cold water recovery chamber 12 are respectively supplied to the user-side water-using device 500 through pipelines. The first water level detection device detects the water level in the cold water recovery chamber 12 and transmits the detection result to the controller 9. The cold water replenishing pipe 3 is connected to the municipal tap water nearby. When the water level in the cold water recovery chamber 12 is lower than the set value, the controller 9 controls the electric control three-way valve 5 to connect the cold water replenishing pipe 3 and the cold water end of the user-side water-using device 500 to ensure the continuous supply of cold water.

[0025] The second water level detection device detects the hot water level in the hot water supply chamber 11. When the hot water level in the hot water supply chamber 11 is lower than the set value, the controller 9 opens the electric control valve 4, and the hot water supply branch pipe 2 replenishes water. During the water replenishment, the cold water generated by the natural heat dissipation of the pipe wall in the hot water supply branch pipe 2 for a long time is injected into the cold water recovery chamber 12, and then the hot water supplied by the hot water supply branch pipe 2 is injected into the hot water supply chamber 11 by means of free overflow. After the water replenishment of the hot water supply chamber 11 is completed, the controller 9 closes the electric control valve 4. In this way, the recovery of the cold water in the hot water supply branch pipe 2 is realized, avoiding the waste of water use and the waste of heat when waiting for hot water by discharging cold water in the traditional way.

[0026] Preferably, the first water level detection device in the cold water recovery chamber 12 includes a first water level detector 7 disposed at the 1 / 5 water level of the cold water recovery chamber 12; the second water level detection device in the hot water supply chamber 11 includes a second water level detector 81 and a third water level detector 82 respectively disposed at the 1 / 5 water level and the full water level of the hot water supply chamber 11. Thus, when the cold water level is lower than the first water level detector 7, the controller 9 switches the water supply at the cold water end of the user-side water use device 500 from the cold water outlet pipe 6 to the cold water replenishment pipe 3 to ensure cold water supply. When the water level in the hot water supply chamber 11 is lower than the second water level detector 81, the controller 9 controls the electric control valve 4 to open for water replenishment. When the third water level detector 82 detects that the water level in the hot water supply chamber 11 is full, the controller 9 controls to close the electric control valve 4 to stop water supply. The controller 9 and the water level detector are prior arts and not the key points of this case. The controller 9 can adopt common control structures such as PLC or single-chip microcomputer.

[0027] Furthermore, the second water level detection device further includes a fourth water level detector 83 disposed at the 1 / 2 water level of the hot water supply chamber 11. During use, a hot water tank is provided in each room and supplied with hot water by the same main water tank 200. By providing the fourth water level detector 83, when one of the hot water tanks is replenished with hot water, the controller 9 detects whether the hot water level in other hot water tanks is lower than the fourth water level detector 83. If so, the controller 9 also controls the electric control valve 4 of the corresponding hot water tank to open for supplementary hot water supply. This can enable the hot water pump 300 and the water supply pipe 400 to centrally replenish water to reduce heat waste in the pipeline.

[0028] Preferably, the user-side water use device 500 includes one or more of a faucet, a shower, and a washing device. Such as the faucet of a washbasin, the shower in a bathroom, or washing devices such as a washing machine and a dishwasher that need to access cold water and hot water.

[0029] Preferably, a heat insulation layer 13 is provided on the box body 1. Through the heat insulation layer 13, the heat dissipated by the hot water in the box body can be reduced, and the heat preservation time of the hot water in the box body 1 can be extended.

[0030] The above embodiments and diagrams do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the relevant technical field shall be regarded as not departing from the patent scope of the present invention.

Claims

1. A partitioned energy-saving hot water tank, characterized in that: The system comprises a housing, a hot water supply branch pipe, a cold water replenishment pipe, an electric control valve, an electric three-way valve, and a controller; a hot water supply chamber and a cold water recovery chamber are formed in the housing, and the hot water supply chamber and the cold water recovery chamber are connected to each other above; an electric control valve is provided on the hot water supply branch pipe, and the outlet of the hot water supply branch pipe is provided above the cold water recovery chamber; during water replenishment, the cold water in the hot water supply branch pipe generated by long-term natural heat dissipation of the pipe wall is injected into the cold water recovery chamber, and then the hot water supplied by the hot water supply branch pipe is injected into the hot water supply chamber by free overflow; A first water level detection device and a second water level detection device are respectively provided in the cold water recovery chamber and the hot water supply chamber; the hot water end of the user-side water-using equipment is connected to the hot water supply chamber through a pipe; a cold water outlet pipe is connected to the bottom of the cold water recovery chamber, and the cold water outlet pipe, the cold water replenishment pipe and the cold water end of the user-side water-using equipment are connected through an electrically controlled three-way valve; the electric control valve, the electrically controlled three-way valve, the first water level detection device and the second water level detection device are respectively electrically connected to the controller; The first water level detection device in the cold water recovery chamber includes a first water level detector arranged at 1 / 5 water level of the cold water recovery chamber; the second water level detection device in the hot water supply chamber includes a second water level detector and a third water level detector respectively arranged at 1 / 5 water level and full water level of the hot water supply chamber; an insulation layer is provided on the box body.

2. A partitioned energy-saving hot water tank according to claim 1, characterized in that: The second water level detection device further includes a fourth water level detector arranged at a 1 / 2 water level of the hot water supply chamber.

3. A partitioned energy-saving hot water tank according to claim 1, characterized in that: The user-side water-using equipment includes one or more of a faucet, a shower, and a washing device.

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