A hot water supply system with dual energy sources

Abstract

This utility model discloses a dual-energy hot water supply system, including a casing, a water storage tank, a first T-connector, and a second T-connector. A gas-fired heat pump is installed at the top of the casing, while an air-source heat pump and a control device are located at the bottom. The control device is connected to both the gas-fired heat pump and the air-source heat pump via the signal. The cold water outlet of the water storage tank is connected to the inlets of both the gas-fired heat pump and the air-source heat pump via the first T-connector. A circulation pump is installed on the portion of the first T-connector connected to the inlets of both the gas-fired heat pump and the air-source heat pump. The outlets of both the gas-fired heat pump and the air-source heat pump are connected to the hot water inlet of the water storage tank via the second T-connector. The water storage tank also has a cold water inlet and a hot water outlet. This utility model prioritizes the use of the air-source heat pump under low load conditions and activates the gas-fired heat pump under high load or low temperature conditions, thus balancing operating costs. The dual energy sources serve as backups for each other, ensuring uninterrupted water supply and avoiding the excessive carbon emissions associated with solely using gas as an energy source.

Description

Technical Field

[0001] This utility model relates to the field of heating electrical appliances, specifically to a hot water supply system with dual energy sources. Background Technology

[0002] Traditional hot water supply systems typically use a single energy source, such as gas water heaters, electric water heaters, or solar water heaters. Electric water heaters use electricity to convert electrical energy into heat energy to heat water, but electricity is expensive, leading to high operating costs in the long run. Furthermore, their heating speed is limited, and if multiple people use hot water continuously, it may result in insufficient supply. Gas water heaters use natural gas, but pure gas systems have high carbon emissions. Solar water heaters rely on solar energy to heat water, but their operation is greatly affected by weather conditions, installation locations are limited, and initial investment is high. Therefore, with increasing demands for energy conservation and emission reduction, developing a highly efficient, environmentally friendly, and economical dual-energy hot water supply system has become an urgent need. Utility Model Content

[0003] The purpose of this invention is to propose a hot water supply system with dual energy sources for energy conservation and emission reduction.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a hot water supply system with dual energy sources, including a casing, a water storage tank, a first tee pipe, and a second tee pipe. A gas-fired heat source is installed at the top of the casing, and an air-source heat pump and a control device are installed at the bottom. The control device is signal-connected to the gas-fired heat source and the air-source heat pump. The cold water outlet of the water storage tank is connected to the inlet of the gas-fired heat source and the air-source heat pump through the first tee pipe. A circulation pump is installed on the portion of the first tee pipe connected to the inlet of the gas-fired heat source and the air-source heat pump. The outlet of the gas-fired heat source and the air-source heat pump is connected to the hot water inlet of the water storage tank through the second tee pipe. The water storage tank is also provided with a cold water inlet and a hot water outlet.

[0006] As a preferred technical solution, the water storage tank is also equipped with a safety valve pressure relief port and a water tank drain port.

[0007] As a preferred technical solution, the gas inlet of the gas heat source machine is connected to a gas pipeline extending outside the machine casing, and a gas proportional valve is installed on the gas pipeline.

[0008] As a preferred technical solution, the portion of the first three-way pipe connected to the inlet of the gas heat source machine and the air source heat pump is also equipped with a filter valve, a one-way valve and a water flow sensor, and the filter valve is closest to the water storage tank.

[0009] As a preferred technical solution, a control panel is also provided on the outer wall of the chassis, and the control panel is signal-connected to the control device.

[0010] As a preferred technical solution, the top of the chassis is also provided with a flue pipe, which is connected to the top of the gas heat source machine.

[0011] As a preferred technical solution, a temperature detector is installed inside the water storage tank, and the temperature detector signal is connected to the control device.

[0012] In summary, due to the adoption of the above technical solutions, the beneficial effects of this utility model are as follows: the hot water supply system of this utility model has dual energy sources. When the load is low, the air source heat pump is used first, and the gas is used when the load is high or the temperature is low. This can balance the operating costs. At the same time, the two energy sources serve as backups for each other, which can ensure uninterrupted water supply and avoid the problem of excessive carbon emissions when using gas as the sole energy source. Attached Figure Description

[0013] Figure 1 The working principle diagram of this utility model is shown.

[0014] Figure 2 The overall structural diagram of this utility model is shown.

[0015] Figure 3 The internal structure diagram of the chassis of this utility model is shown.

[0016] Legend: 1. Chassis; 2. Water tank; 3. First tee pipe; 4. Second tee pipe; 5. Gas-fired heat source unit; 6. Air source heat pump; 7. Control device; 8. Circulation pump; 9. Safety valve pressure relief port; 10. Water tank drain port; 11. Gas pipeline; 12. Filter valve; 13. Check valve; 14. Water flow sensor; 15. Control panel; 16. Exhaust pipe; 17. Temperature detector; 18. Gas proportional valve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] Example 1

[0020] like Figure 1-3 The illustrated embodiment provides a dual-energy hot water supply system, including a casing 1, a water storage tank 2, a first tee pipe 3, and a second tee pipe 4. The water storage tank 2 has a layered structure, with the upper layer being the hot water zone and the lower layer being the cold water zone. This type of water storage tank 2 is already well-established in the prior art, therefore its internal structure is not shown in the accompanying drawings. A gas-fired heat source unit 5 is installed at the top of the casing 1, and an air-source heat pump 6 and a control device 7 are installed at the bottom. It should be noted that the gas-fired heat source unit 5 and the air-source heat pump 6 are already well-established in the prior art, therefore their working principles and detailed structures will not be described here. The control device 7 is signal-connected to the gas-fired heat source unit 5 and the air-source heat pump 6, and controls the gas-fired heat source unit 5. The start-up, shutdown, and switching of the gas-fired heat pump 5 and the air-source heat pump 6 are controlled by the following: the cold water outlet of the storage tank 2 is connected to the inlet of the gas-fired heat pump 5 and the air-source heat pump 6 through the first three-way pipe 3; a circulation pump 8 is installed on the part of the first three-way pipe 3 connected to the inlet of the gas-fired heat pump 5 and the air-source heat pump 6; when hot water is needed, the circulation pump 8 pumps the cold water in the storage tank 2 into the heat exchanger of the gas-fired heat pump 5 or the air-source heat pump 6 through the first three-way pipe 3 for heating; the outlet of the gas-fired heat pump 5 and the air-source heat pump 6 is connected to the hot water inlet of the storage tank 2 through the second three-way pipe 4; and the hot water then enters the storage tank 2 through the second three-way pipe 4 for storage; the storage tank 2 is also equipped with a cold water inlet and a hot water outlet for cold water to enter and hot water to be discharged for use at the water end.

[0021] The working principle of this embodiment:

[0022] After installing the hot water supply system, the user first obtains the local peak and off-peak electricity usage times and inputs the off-peak usage times into the control device 7. Simultaneously, an ambient temperature threshold is set; in this embodiment, the threshold is 5°C. The threshold is set based on the fact that the efficiency of the air source heat pump 6 decreases when the ambient temperature is below 5°C. When hot water is needed, the control device 7 judges the electricity usage time and ambient temperature. If it is during an off-peak electricity usage time and the ambient temperature is above the threshold, the electricity cost is relatively low, and the control device 7 independently controls the air source heat pump 6 to heat the water. If it is during a peak electricity usage time and the ambient temperature is above the threshold, the electricity cost is relatively high, and the control device 7 controls the air source heat pump 6 to heat the water. Control device 7 independently controls gas-fired heat pump 5 to heat water. If it is during off-peak electricity consumption but the ambient temperature is below the threshold, the efficiency of air-source heat pump 6 decreases. Although the electricity cost is not high, the heating efficiency of air-source heat pump 6 alone is relatively low. Therefore, control device 7 controls air-source heat pump 6 and gas-fired heat pump 5 to work simultaneously. If it is during peak electricity consumption and the ambient temperature is below the threshold, the electricity cost is high and the efficiency of air-source heat pump 6 is also low. In this case, control device 7 controls gas-fired heat pump 5 to work alone. Finally, if it is during peak water consumption, control device 7 controls air-source heat pump 6 and gas-fired heat pump 5 to work simultaneously. Dual energy sources can quickly raise the water temperature.

[0023] Example 2

[0024] like Figure 1-3 As shown, this embodiment is developed based on the above embodiment to solve the safety problem of using the water storage tank 2. Specifically, the water storage tank 2 is also equipped with a safety valve pressure relief port 9 and a water tank drain port 10. When the pressure inside the water storage tank 2 exceeds the pressure value set by the safety valve, the safety valve pressure relief port 9 opens, releasing the excess pressure to prevent the water tank from rupturing, exploding, or other dangerous situations due to excessive pressure. The water tank drain port 10 is used for draining sewage.

[0025] Example 3

[0026] like Figure 1-3 As shown, this embodiment is developed based on the above embodiment to solve the gas source problem of the gas heat source machine 5. Specifically, the gas inlet of the gas heat source machine 5 is connected to a gas pipe 11 extending outside the casing 1, and a gas proportional valve 18 is installed on the gas pipe 11. Gas enters the gas heat source machine 5 from the gas pipe 11, and the gas proportional valve 18 is used to regulate the gas intake volume.

[0027] Example 4

[0028] like Figure 1-3As shown, this embodiment is developed based on the above embodiment to solve the gas source problem of the gas heat source machine 5. Specifically, a filter valve 12, a one-way valve 13, and a water flow sensor 14 are also provided on the part of the first three-way pipe 3 that connects to the water inlet of the gas heat source machine 5 and the air source heat pump 6, and the filter valve 12 is closest to the water storage tank 2. The filter valve 12 is mainly used to intercept impurities in the cold water inlet, the one-way valve 13 prevents water backflow, and the water flow sensor 14 is used to detect the water flow in the first three-way pipe 3. When the water flow sensor 14 on the part of the first three-way pipe 3 that connects to the air source heat pump 6 detects a particularly large water flow, it indicates that there is a large demand for water. The control device 7 can control the gas heat source machine 5 to start, so as to avoid the inability of the air source heat pump 6 alone to meet the demand for large amounts of water.

[0029] Example 5

[0030] like Figure 1-3 As shown, this embodiment is developed based on the above embodiments to address how users operate the control device 7. Specifically, a control panel 15 is also provided on the outer wall of the chassis 1, and the control panel 15 is signal-connected to the control device 7. Control commands can be input to the control device 7 through the control panel 15.

[0031] Example 6

[0032] like Figure 1-3 As shown, this embodiment is developed based on the above embodiment in order to solve the problem of smoke exhaust of the gas heat source machine 5. Specifically, the top of the casing 1 is also provided with a smoke exhaust pipe 16, which is connected to the top of the gas heat source machine 5, and the smoke generated by the gas heat source machine 5 is discharged from the smoke exhaust pipe 16.

[0033] Example 7

[0034] like Figure 1-3 As shown, this embodiment is developed based on the above embodiment to solve the heat preservation problem of the water storage tank 2. Specifically, a temperature detector 17 is installed inside the water storage tank 2, and the temperature detector 17 is connected to the control device 7. The temperature detector 17 is equipped with a temperature threshold. When the actual water temperature detected by the temperature detector 17 is lower than the temperature threshold, the temperature detector 17 transmits a signal to the control device 7. The control device 7 then controls the gas-fired heat source 5 or the air-source heat pump 6 inside the casing 1 to heat the water until the temperature threshold is reached.

[0035] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hot water supply system having dual energy sources, characterised in that: The system includes a chassis (1), a water storage tank (2), a first three-way pipe (3), and a second three-way pipe (4). A gas-fired heat source machine (5) is installed at the top of the chassis (1), and an air-source heat pump (6) and a control device (7) are installed at the bottom. The control device (7) is connected to the gas-fired heat source machine (5) and the air-source heat pump (6) via the first three-way pipe (3). The cold water outlet of the water storage tank (2) is connected to the inlet of the gas-fired heat source machine (5) and the air-source heat pump (6) via the first three-way pipe (3). A circulation pump (8) is installed on the part of the first three-way pipe (3) connected to the inlet of the gas-fired heat source machine (5) and the air-source heat pump (6). The outlet of the gas-fired heat source machine (5) and the air-source heat pump (6) is connected to the hot water inlet of the water storage tank (2) via the second three-way pipe (4). The water storage tank (2) is also provided with a cold water inlet and a hot water outlet.

2. The hot water supply system having dual energy sources according to claim 1, characterized by: The water storage tank (2) is also equipped with a safety valve pressure relief port (9) and a water tank drain port (10).

3. The hot water supply system with dual energy sources according to claim 1, characterized in that: The gas inlet of the gas heat source machine (5) is connected to a gas pipe (11) extending outside the casing (1), and a gas proportional valve (18) is provided on the gas pipe (11).

4. The dual energy hot water supply system of claim 1, wherein: The first three-way pipe (3) is also equipped with a filter valve (12), a one-way valve (13) and a water flow sensor (14) on the part that is connected to the inlet of the gas heat source machine (5) and the air source heat pump (6), and the filter valve (12) is closest to the water storage tank (2).

5. The dual energy hot water supply system of claim 1, wherein: A control panel (15) is also provided on the outer wall of the chassis (1), and the control panel (15) is connected to the control device (7) via signal.

6. The dual energy hot water supply system of claim 1, wherein: The top of the chassis (1) is also provided with a flue pipe (16), which is connected to the top of the gas heat source machine (5).

7. The dual energy hot water supply system of claim 1, wherein: A temperature detector (17) is installed inside the water storage tank (2), and the temperature detector (17) is connected to the control device (7).

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