Novel open-type and closed-type combined water heating device

Abstract

The utility model discloses an open type and closed type combined novel water heating device which comprises a solar water heater, an electric heating water storage tank, a tap water end and a user end, the water outlet end of the solar water heater is connected with the water inlet end of the electric heating water storage tank through a pipe A, and a circulating pump, a control valve A, a check valve and a pressure release valve are arranged on the pipe A; the water outlet end of the electric heating water storage tank is connected with the water inlet end of the solar water heater through a pipe B. A control valve B is arranged on the pipe B. The tap water end is connected with the pipe B through a pipe C. A control valve C is arranged on the pipe C. The water outlet end of the electric heating water storage tank is connected with the user end through a pipe D. A temperature and water level sensor is arranged in the solar water heater. And a temperature sensor is arranged in the electric heating water storage tank. The solar water heater with an open system and the electric heating water storage tank with a closed system are adopted to form a novel hot water supply system, so that the heat collection efficiency is greatly improved, the heat collection efficiency is improved, the heat loss is reduced, and the energy is saved.

Description

Technical Field

[0001] The utility model relates to a novel hot water device, in particular to a novel hot water device which combines an open system solar water heater with a closed system electric heating water storage tank. Background Art

[0002] Solar water heaters are devices that convert solar energy into thermal energy, heating water from low temperature to high temperature to meet people's hot water needs in life. Commonly used solar water heaters are mainly open-type vacuum water heaters with heat collection, which are installed on the roof of the house. The solar water heaters of this type are connected to the atmosphere and are called heat collection water heaters. The solar water heaters using the traditional open system are directly connected to the user's water pipes because of their long pipes, large waste of cold water discharge in the pipes, and the water pressure in the pipes depends only on the difference between the water heater and the user's hot water outlet, resulting in low water pressure and low water volume. In addition, due to seasonal reasons, the solar water heater has too much heat in summer and too little heat in winter, resulting in low thermal energy efficiency. Therefore, the comfort and efficiency of the solar water heaters of the open system are poor. The solar water heater system using the traditional closed system is a closed system, so its collectors, water storage tanks, etc. require a certain pressure bearing capacity, the cost is relatively high, and the temperature control of the solar water heater is relatively difficult, which will have certain safety hazards. Utility Model Content

[0003] The purpose of the utility model is to provide a new type of water heating device combining open and closed types, which adopts a solar water heater of an open system and an electric heating water storage tank of a closed system to form a new type of water heating system, thereby improving the solar energy conversion efficiency, improving the heat collection efficiency, reducing the heat loss, saving energy, reducing the construction cost, avoiding the safety problem of the closed system, and facilitating the use of users.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a new type of water heating device combining open and closed types, including a solar water heater of the open system located outside the building, an electric heating water storage tank of the closed system located inside the building, a tap water end and a user end;

[0005] The water outlet of the solar water heater is connected to the water inlet of the electric water storage tank through pipe A, and the water outlet of the electric water storage tank is connected to the water inlet of the solar water heater through pipe B to form a circulation loop to heat the water in the electric water storage tank. On the pipe A, a circulation pump, a control valve A, a check valve and a pressure relief valve are arranged in sequence from the water outlet of the solar water heater to the water inlet of the electric water storage tank, and a control valve B is arranged on the pipe B;

[0006] The tap water end is connected to the pipe B through the pipe C, and a control valve C is arranged on the pipe C. The water outlet end of the electric heating water storage tank is connected to the user end through the pipe D;

[0007] The solar water heater is provided with a temperature sensor and a water level sensor, and the temperature sensor and the water level sensor adopt temperature and water level sensors; the electric heating water storage tank is provided with a temperature sensor, and an outdoor temperature sensor is provided outdoors, and also includes a controller.

[0008] Preferably, the tap water end is connected to the user end through pipe E.

[0009] Preferably, the tap water end is connected to the pipe A through a pipe F, and a control valve F is provided on the pipe F.

[0010] Preferably, a three-way valve is provided on the pipe A in front of the check valve, and the three-way valve is connected to the user end through the pipe G.

[0011] Preferably, heating tapes are installed on the outdoor ends of the pipes A and B.

[0012] Preferably, the electric water storage tank is a closed container, which includes an inner tank, an insulation layer and an outer shell. The insulation layer is filled in the cavity between the inner tank and the outer shell, and a heating rod is arranged in the inner tank.

[0013] In this example, the water level in the solar water heater is set to L, the water temperature is set to T1, the water temperature in the electric heating water storage tank is set to T2, and the outdoor temperature is set to T3;

[0014] During operation, the water replenishment module of the solar water heater is divided into morning and afternoon sections and a fixed time period every day. When the temperature water level sensor 5 in the solar water heater detects that the water level L is less than or equal to 25, the control valve C on the pipe C is opened to replenish water. When it is judged that the water level L reaches 100 in the morning, the control valve C is closed. When the water level L reaches 50 in the afternoon, the control valve C is closed. A fixed time period can be set for each day. For example, it is set to detect whether the water level is 100 at 3 am. If it does not reach 100, water replenishment is performed.

[0015] The controller is divided into summer mode, winter mode and severe cold mode according to seasonal climate changes. Different modes can adjust the time by themselves.

[0016] In summer mode, when T2<=25°, the controller starts the heating rod, and when the water in the electric heating water storage tank is heated to 60°, the heating rod is turned off; when T2<=45°, it is judged that T1-T2>=15°, the controller controls the control valve F and the three-way valve to close, and the control valve B and the control valve A to open, and the circulation pump senses the pressure change and starts the circulation; when it is judged that T1-T2<=6° or T2>=65°, the controller controls the control valve F to open, the three-way valve, the control valve B, and the control valve A to close, and the circulation stops;

[0017] In winter mode, some operating conditions change. When T2<=35°, the controller starts the heating rod; when it is judged that T1-T2<=6° or T2>=60°, the circulation stops. In winter mode, when it is judged that T3<=0°, the heating tape is turned on to prevent the pipe from freezing and cracking. When using, the user can choose to control the opening and closing of the three-way valve according to the actual temperature, and decide to use the hot water in the solar water heater, electric water storage tank or a combination of the two as the hot water source. When the user uses water, the tap water provides power for the system operation in the non-circulating state, and the circulating pump starts to provide power for the system operation in the circulating state;

[0018] In severe cold mode, due to the low thermal efficiency of the solar water heater, control valve A, control valve B, and three-way valve are closed, control valve F is opened, and the hot water in the solar water heater is stopped. The user uses the electric heating water tank as the hot water source. When T2 <= 35°, the controller starts the heating rod, and the heating rod is turned off when the electric heating water tank is heated to 60°.

[0019] Compared with the prior art, the advantages and positive effects of the utility model are: by installing an open system solar water heater on the roof of the user, combining it with the indoor closed system electric heating water tank, using the solar heating effect of the solar water heater, circulating and preheating the water in the electric heating water tank, improving the heat collection efficiency, reducing heat loss, and saving energy; according to different seasons, the user can perform a specific automatic operation mode and switch the pipeline so that the open system solar water heater and the closed system electric heating water tank can be combined, or the electric heating water tank can be used alone to supply hot water, or the solar water heater can be used alone to supply hot water, which is flexible and convenient, improves the heat collection efficiency, and saves energy. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 It is a structural schematic diagram of an open-type and closed-type combined solar water heater device and a control method thereof of the utility model;

[0022] In the above figures: 1. outdoor temperature sensor; 2. pipe C; 3. control valve C; 4. heating belt; 5. temperature and water level sensor; 6. solar water heater; 7. controller; 8. control valve B; 9. pipe D; 10. user end; 11. pipe E; 12. tap water end; 13. electric heating water tank; 14. temperature sensor; 15. pipe G; 16. heating rod; 17. pressure relief valve; 18. three-way valve; 19. check valve; 20. control valve A; 21. circulation pump; 22. pipe A; 23. outer shell; 24. insulation layer; 25. liner; 26. control valve F; 27. pipe F. DETAILED DESCRIPTION

[0023] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0024] Figure 1 The present design is shown, and the technical solution of the present utility model will be clearly and completely described below in conjunction with the specific embodiments of the present utility model.

[0025] A new type of water heating device combining open and closed types, comprising a solar water heater 6 of an open system located outside a building, an electric heating water storage tank 13 of a closed system located inside the building, a tap water end 12 and a user end 10, wherein the user end 10 is connected to a faucet or other water-using equipment;

[0026] The electric heating water storage tank 13 is a closed container, which includes an inner tank 25, a heat-insulating layer 24 and an outer shell 23. The heat-insulating layer 24 is filled in the cavity between the inner tank 25 and the outer shell 23. A heating rod 16 is arranged in the inner tank 25.

[0027] The water outlet of the solar water heater 6 is connected to the water inlet of the electric heating water storage tank 13 through the pipe A 22, and the water outlet of the electric heating water storage tank 13 is connected to the water inlet of the solar water heater 6 through the pipe B, forming a circulation loop to heat the water in the electric heating water storage tank 13;

[0028] On pipe A 22, a circulation pump 21, a control valve A 20, a check valve 19 and a pressure relief valve 17 are sequentially arranged from the water outlet of the solar water heater 6 to the water inlet of the electric heating water storage tank 13, a control valve B 8 is arranged on pipe B, and a heating belt 4 is installed on the outdoor ends of pipe A 22 and pipe B;

[0029] The tap water end 12 is connected to the pipe B through the pipe C 2, and a control valve C 3 is provided on the pipe C 2. The water outlet end of the electric heating water storage tank 13 is connected to the user end 10 through the pipe D 9.

[0030] The solar water heater 6 is provided with a temperature sensor and a water level sensor, the temperature sensor and the water level sensor adopt a temperature and water level sensor 5, the electric heating water storage tank 13 is provided with a temperature sensor 14, an outdoor temperature sensor 1 is provided outdoors, and also includes a controller 7.

[0031] The tap water end 12 is connected to the user end 10 through the pipe E11, and the tap water end 12 is connected to the pipe A22 through the pipe F27, and a control valve F26 is provided on the pipe F27.

[0032] On the pipe A 22, a three-way valve 18 is provided in front of the check valve 19, and the three-way valve 18 is connected to the user end 10 through the pipe G15.

[0033] Control valve A 20 and control valve B 8 are normally closed switches used to control the heat exchange between the water in the solar water heater 6 and the water in the electric heating water storage tank 13; control valve F 26 is a normally open switch used to control whether the water in the tap water end 12 enters the electric heating water storage tank 13; control valve C 3 is a normally closed switch used to control whether the water in the tap water end 12 enters the solar water heater 6.

[0034] In this example, the water level in the solar water heater 6 is set to L, the water temperature is set to T1, the water temperature in the electric heating water storage tank 13 is set to T2, and the outdoor temperature is set to T3;

[0035] During operation, the water replenishment module of the solar water heater 6 is divided into a morning section, an afternoon section and a fixed time period every day. When the temperature water level sensor 5 in the solar water heater 6 detects that the water level L is less than or equal to 25, the control valve C3 on the pipe C2 is opened to replenish water. When it is judged that the water level L reaches 100 in the morning, the control valve C3 is closed. When the water level L reaches 50 in the afternoon, the control valve C3 is closed. A fixed time period can be set every day. For example, it is set to detect whether the water level is 100 at 3 am. If it does not reach 100, water replenishment is performed.

[0036] The controller 7 is divided into summer mode, winter mode and severe cold mode according to seasonal climate changes. Different modes can adjust the time automatically. Specifically,

[0037] In summer mode, when T2<=25°, the controller 7 starts the heating rod 16, and when the water in the electric heating water storage tank 13 is heated to 60°, the heating rod 16 is turned off; when T2<=45°, it is judged that T1-T2>=15°, the controller 7 controls the control valve F 26 and the three-way valve 18 to be closed, the control valve B 8 and the control valve A 20 to be opened, and the circulation pump 21 senses the pressure change and starts, and the circulation starts; when it is judged that T1-T2<=6° or T2>=65°, the controller 7 controls the control valve F 26 to be opened, the three-way valve 18, the control valve B 8, and the control valve A 20 to be closed, and the circulation stops;

[0038] In winter mode, some operating conditions change. When T2<=35°, the controller 7 starts the heating rod 16; when it is judged that T1-T2<=6° or T2>=60°, the circulation stops. In winter mode, when it is judged that T3<=0°, the heating tape 4 is turned on to prevent the pipe from freezing and cracking. When in use, the user can choose to control the opening and closing of the three-way valve 18 according to the actual temperature, and decide to use the hot water in the solar water heater 6, the electric water storage tank 13, or the combination of the two as the hot water source. When the user end 10 uses water, the tap water provides power for the system operation in the non-circulating state, and the circulating pump 21 is started in the circulating state to provide power for the system operation;

[0039] In severe cold mode, due to the low thermal efficiency of the solar water heater 6, the control valve A 20, the control valve B 8, and the three-way valve 18 are closed, and the control valve F 26 is opened to stop using the hot water in the solar water heater 6. The user uses the electric heating water tank 13 as a hot water source. When T2 <= 35°, the controller 7 starts the heating rod 16, and the heating rod 16 is turned off when the electric heating water tank 13 is heated to 60°.

Claims

1. A new type of hot water device combining open and closed types, characterized in that: include, Solar water heaters located outside the building in an open system, electric heating water storage tanks located inside the building in a closed system, tap water end and user end; The water outlet of the solar water heater is connected to the water inlet of the electric water storage tank through pipe A, and the water outlet of the electric water storage tank is connected to the water inlet of the solar water heater through pipe B to form a circulation loop to heat the water in the electric water storage tank. On the pipe A, a circulation pump, a control valve A, a check valve and a pressure relief valve are arranged in sequence from the water outlet of the solar water heater to the water inlet of the electric water storage tank, and a control valve B is arranged on the pipe B; The tap water end is connected to the pipe B through the pipe C, and a control valve C is arranged on the pipe C. The water outlet end of the electric heating water storage tank is connected to the user end through the pipe D; The solar water heater is provided with a temperature sensing device and a water level sensor, the electric heating water storage tank is provided with a temperature sensing device, a temperature sensor is provided outdoors, and a controller is also included.

2. The novel hot water device combining open and closed types according to claim 1 is characterized in that: The tap water end is connected to the user end through pipe E.

3. The novel hot water device combining open and closed types according to claim 1 is characterized in that: The tap water end is connected to the pipe A through the pipe F, and a control valve F is arranged on the pipe F.

4. The novel hot water device combining open and closed types according to claim 1 is characterized in that: A three-way valve is provided on the pipe A in front of the check valve, and the three-way valve is connected to the user end through the pipe G.

5. The novel open and closed combined water heater according to claim 1 is characterized in that: The pipes A and B are provided with heating cables on their outdoor ends.

6. The novel hot water device combining open and closed types according to claim 1 is characterized in that: The electric heating water storage tank is a closed container, which includes an inner tank, a heat-insulating layer and an outer shell. The heat-insulating layer is filled in the cavity between the inner tank and the outer shell, and a heating rod is arranged in the inner tank.

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