Dual-energy water heating device

Abstract

The invention belongs to the technical field of water heating devices, and discloses a dual-energy water heating device which is mainly used for solving the problems that when an existing dual-energy water heating device combining gas heating and heat pump heating shares one heat exchange system, the heat exchange efficiency is low, and control is difficult. The dual-energy water heating device is provided with the gas heating module and the heat pump heating module which are independent, two sets of independent heat exchange systems are arranged on the basis of different heating principles of the two heating modules, and a gas and heat pump combined operation mode can be adopted; when a small amount of water (heat preservation energy consumption or hot water circulation) is used, only the heat pump heating module is used for working, when a large amount of water is used, the gas heating module is started to achieve rapid reheating, when cold water is heated for the first time, operation can be conducted at the same time, control is relatively simple, and cost is low. And the two heat exchange systems adopted in the invention not only can ensure long-acting work of the heat exchange systems, but also can improve the heat exchange efficiency of different heat exchange systems in different heating systems.

Description

Technical Field

[0001] The invention belongs to the technical field of water heaters, and in particular relates to a dual-energy water heater. Background Art

[0002] Hot water devices are household appliances commonly used in people's daily lives. In the field of traditional hot water devices, electric water heaters and gas water heaters are the most widely used. However, with the continuous progress of society and the continuous development of science and technology, more and more new energy water heaters are created. Among them, the most efficient are solar water heaters and air-energy water heaters. Both types of water heaters use nature's own energy to generate heat, which is not only energy-saving and environmentally friendly, but also more in line with China's concept of sustainable development.

[0003] In recent years, since single-energy water heating devices have certain shortcomings, dual-energy water heating devices that combine two different energy heating systems have emerged, such as a dual-energy water heater combining wind energy and solar energy disclosed in patent application number "CN200920253664.3", and a dual-energy water heater combining solar energy and air energy disclosed in patent application number "CN201721591231.X".

[0004] Dual-energy water heaters that combine gas water heaters with air-energy water heaters (i.e., heat pump water heaters) have also appeared. However, at present, this type of water heater generally shares a heat exchange system, such as the dual-energy water heater disclosed in patent application number "CN202011414397.0". Such an architecture will certainly make the overall structure of the device simpler and smaller in size, but sharing a heat exchange system is more likely to cause overload of the heat exchange system and low heat exchange efficiency, and the control switching of the heating system will also be more complicated; on the other hand, the current research on dual-energy water heaters is more inclined to the working combination between dual-energy heating systems, and there is no relatively integrated integrated product output. Because the dual-energy water heater involves relatively many local components, if it is produced as an integrated water heater, it is necessary to reasonably design and assemble it according to the structure of each component and the working connection between multiple components. This process is also a relatively difficult innovation process. Summary of the invention

[0005] The purpose of the present invention is to provide a dual-energy water heater, aiming to solve the problem that the existing dual-energy water heaters which use a combination of gas heating and heat pump heating share a set of heat exchange systems and have low heat exchange efficiency and are difficult to control.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A dual-energy water heating device comprises a water tank, a gas heating module and a heat pump heating module, wherein the water tank is provided with a cold water inlet and a hot water outlet, and is characterized in that the gas heating module comprises a combustion unit and a gas heating heat exchange pipe, wherein the combustion unit is installed above the water tank, the gas heating heat exchange pipe is installed in the water tank and connected to the combustion unit, and the gas heating heat exchange pipe is connected to a flue gas exhaust pipe; the heat pump heating module comprises a compressor, a heat pump heating heat exchanger and an evaporator, wherein the compressor, the heat pump heating heat exchanger and the evaporator are connected in a cycle in sequence; the water tank is also provided with a heat pump heating circulation outlet and a heat pump heating circulation return outlet, and the heat pump heating circulation outlet and the heat pump heating circulation return outlet are respectively connected to the heat pump heating heat exchanger through pipelines.

[0008] As a further preferred embodiment of the present technical solution, the gas heating heat exchange tube includes a main heat exchange tube, a circulating heat exchange tube and a flue gas condensation tube. A flue gas diversion chamber is arranged above the water tank, and a flue gas condensation chamber is arranged below the water tank. The upper end of the main heat exchange tube passes through the water tank and is connected to the combustion unit, and the lower end of the main heat exchange tube extends to the bottom of the water tank and is connected to the lower end of the circulating heat exchange tube. The upper end of the circulating heat exchange tube is connected to the flue gas diversion chamber, and the two ends of the flue gas condensation tube are respectively connected to the flue gas diversion chamber and the flue gas condensation chamber, and the lower end of the flue gas condensation chamber is connected to the flue gas exhaust pipe.

[0009] As a further preferred embodiment of the present technical solution, it also includes a top-mounted cover and a bottom-mounted cover adapted to the water tank, wherein the top-mounted cover is installed above the flue gas diversion chamber and covers the combustion unit, and a gas heating air inlet is provided on the top-mounted cover; the bottom-mounted cover is installed below the water tank and covers the flue gas condensation chamber and the flue gas exhaust pipe.

[0010] As a further preferred embodiment of the present technical solution, it further comprises an outer cylinder, which is sleeved on the water storage tank and the bottom mounting cover, and the upper end of the outer cylinder is connected to the lower end of the top mounting cover, and the lower end of the outer cylinder is mounted with a closed base.

[0011] As a further preferred embodiment of the present technical solution, the upper end surface of the closed base is provided with a plurality of positioning connecting pieces for positioning the bottom mounting cover, and the lower end surface of the closed base is fixedly provided with at least two load-bearing and limiting beams which are parallel to each other and spaced apart.

[0012] As a further preferred embodiment of the present technical solution, the medium outlet end of the compressor is connected to the evaporator and the heat pump heating heat exchanger through a four-way valve, a circulating pump is provided on the connecting pipe between the heat pump heating heat exchanger and the heat pump heating circulation water outlet, and an expansion valve is provided on the connecting pipe between the heat pump heating heat exchanger and the evaporator.

[0013] As a further preferred embodiment of the present technical solution, the heat pump heating module also includes a mounting frame, which is fixedly connected to the outer wall of the water tank, and the side of the mounting frame connected to the water tank is open; a plurality of partitions are horizontally arranged in the mounting frame, and the plurality of partitions form a plurality of layers of installation space in the mounting frame, and the compressor, heat pump heating heat exchanger and evaporator are respectively installed in a separate layer of the installation space.

[0014] As a further preferred embodiment of the present technical solution, the mounting frame includes a back plate, a side plate, a top plate and a bottom plate, and the partition includes a first partition plate, a second partition plate and a third partition plate, a first mounting space for installing an air inlet pipe of the combustion unit is formed between the first partition plate and the top plate, and a gas air inlet is provided on the side plate corresponding to the first mounting space area; a second mounting space for installing the evaporator is formed between the second partition plate and the first partition plate, and a heat pump air inlet is provided on the side plate corresponding to the second mounting space area; a second mounting space for installing the evaporator is formed between the second partition plate and the first partition plate, a third mounting space for installing the heat pump heating exchanger is formed between the third partition plate and the second partition plate, and a fourth mounting space for installing the compressor is formed between the third partition plate and the bottom plate.

[0015] As a further preferred embodiment of the present technical solution, the evaporator is disposed between the first partition plate and the second partition plate and is installed close to the back plate, and an evaporator fan is installed on the back plate at a position corresponding to the installation position of the evaporator.

[0016] As a further preferred embodiment of the present technical solution, the water tank is also provided with a safety valve port for automatic pressure relief, a drain valve port for manual drainage, and a cleaning port for cleaning the water tank.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The dual-energy water heater of the present invention is provided with a separate gas heating module and a heat pump heating module, and two independent heat exchange systems are provided based on the different heating principles of the two heating modules. The gas heating module has a high instantaneous heating heat and a fast temperature rise, so the gas heating heat exchange pipe is directly arranged in the water storage tank to ensure the maximum heat exchange efficiency, which can be used for rapid reheating; on the other hand, the heat pump heating module adopts an external mode, and the water in the water storage tank flows through the heat pump heating heat exchanger in the heat pump heating module through the heat pump heating circulation outlet to achieve heat exchange. Because the heat exchange continuity of the heat pump heating module is high, it can be used for heat preservation energy consumption or hot water circulation; the present invention adopts a combined operation mode of gas + heat pump. When a small amount of water is used (heat preservation energy consumption or hot water circulation), only the heat pump heating module can be used to work. When a large amount of water is used, the gas heating module is started to achieve rapid reheating. When the cold water is heated for the first time, it can also run simultaneously, and the control is relatively simple. The two sets of heat exchange systems used in the present invention can not only ensure the long-term operation of the heat exchange system, but also improve the heat exchange efficiency of different heat exchange systems in different heating systems.

[0019] 2. The gas heating module in the present invention adopts an upward combustion method. The hot flue gas generated by the combustion of the combustion unit first flows from the upper part of the water tank to the bottom of the water tank through the main heat exchange pipe to realize the first heat exchange, and then flows from the bottom of the water tank to the upper part of the water tank through the circulating heat exchange pipe and enters the flue gas diversion chamber to realize the secondary heat exchange. At this time, the flue gas with residual heat flows from the upper part of the water tank to the lower part of the water tank through the flue gas condensation pipe again and enters the flue gas condensation chamber to realize the second heat exchange. At this time, the flue gas that has completed the heat exchange is finally discharged through the flue gas exhaust pipe, which can realize three heat exchange processes, so that the hot flue gas generated by the combustion can fully exchange heat with the water in the water tank, improve the heat exchange efficiency, and reduce heat loss and resource waste.

[0020] 3. In order to realize the overall integration of the device and the aesthetic appearance, the gas heating module in the present invention is also provided with a top mounting cover and a bottom mounting cover adapted to the water tank. The top mounting cover is installed above the flue gas diversion chamber and covers the combustion unit, and heat dissipation holes are provided on the top mounting cover; the bottom mounting cover is installed below the water tank and covers the flue gas condensation chamber and the flue gas exhaust pipe, and a flue gas exhaust pipe opening is provided on the bottom mounting cover.

[0021] 4. In order to ensure the beauty of the overall appearance of the device and the safety of the water tank, the gas heating module in the present invention is also provided with an outer cylinder, which is sleeved on the water tank and the bottom mounting cover, and the upper end of the outer cylinder is connected to the lower end of the top mounting cover, and the lower end of the outer cylinder is installed with a closed base; at the same time, in order to improve the bearing capacity of the base and facilitate the transportation and transfer of the device, at least two load-bearing limit beams parallel to each other and arranged at intervals are fixedly installed on the lower end surface of the closed base, and the interval space between the multiple load-bearing limit beams can be used as an insertion space for a forklift fork. When the whole machine needs to be transported and transferred, the forklift can be controlled to insert its fork into the interval space of the load-bearing limit beams under the closed base, and the load-bearing limit beams play a role in limiting the left and right sliding of the fork to prevent the fork from tipping over when the whole machine is lifted; and in order to facilitate the positioning and installation of the bottom mounting cover, a plurality of positioning connecting plates for positioning the bottom mounting cover are also provided on the upper end surface of the closed base.

[0022] 5. The heat pump heating module in the present invention compresses the low-pressure refrigerant through the compressor and turns it into high-temperature and high-pressure gas for discharge. The high-temperature and high-pressure refrigerant gas flows through the heat pump heating heat exchanger and transfers its own heat to the circulating water from the water storage tank that also flows through the heat pump heating heat exchanger. The refrigerant cooled down after heat exchange becomes liquid under the continuous action of pressure, and then enters the evaporator after passing through the expansion valve. The function of the evaporator is that when the outside air flows through the outer surface of the evaporator, the heat contained in it will be absorbed by the evaporator, and the liquid refrigerant entering the evaporator will quickly evaporate into gas under pressure and absorb the evaporator. A large amount of heat is absorbed by the refrigerant, and then the refrigerant having absorbed a certain amount of energy flows back to the compressor to enter the next cycle; at the same time, in order to change the flow direction of the refrigerant when the heat pump heating module is defrosted, a four-way valve is arranged at the medium outlet end of the compressor to connect the evaporator and the heat pump heating heat exchanger; in order to provide sufficient power for the water in the water storage tank to flow to the heat pump heating heat exchanger, a circulating pump is arranged on the connecting pipe between the heat pump heating heat exchanger and the heat pump heating circulation water outlet; in order to realize throttling, pressure reduction and flow regulation of the medium after heat exchange when it flows to the evaporator, an expansion valve is arranged on the connecting pipe between the heat pump heating heat exchanger and the evaporator.

[0023] 6. The heat pump heating module in the present invention integrates the compressor, heat pump heating heat exchanger and evaporator through a mounting frame, and a plurality of partitions are arranged in the mounting frame to form a corresponding multi-layer mounting space for the separate assembly of each component, which not only achieves the integration and unification of all components in the mounting frame, improves the structural integration of the heat pump heating module, and enables the overall device to be standardized and productized; but also achieves modularization of different components in different mounting spaces, which is convenient for workers to modularly assemble the components, and also has a clearer understanding of the connection between the components, which can avoid errors, and is also convenient for the systematic management and maintenance of the modular components.

[0024] 7. In order to increase the contact area between the evaporator and the outside air, the heat pump heating module in the present invention sets the evaporator between the first partition and the second partition and installs it close to the back plate. A heat pump air inlet is opened on the side plate corresponding to the second installation space area. The outside air enters the second installation space area through the heat pump air inlet and absorbs heat under the action of the evaporator. In order to ensure that the outside air can flow through the evaporator surface in large quantities, an evaporator fan is installed on the back plate at the installation position corresponding to the evaporator. When the evaporator fan is working, it blows air outward, which can speed up the discharge of air in the second installation space, and then the outside air is continuously and quickly sucked in from the heat pump air inlet, realizing rapid air circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0027] Figure 2 for Figure 1 Front projection view of

[0028] Figure 3 It is a partial perspective structural schematic diagram of the present invention;

[0029] Figure 4 It is a schematic diagram of the specific structure of the gas heating module in the present invention;

[0030] Figure 5 It is a schematic diagram of the specific structure of the heat pump heating module in the present invention;

[0031] Figure 6 for Figure 5 Rear view of

[0032] Figure 7 It is a schematic diagram of the overall working process of the present invention when heating;

[0033] Figure 8 It is a schematic diagram of the overall working process of the present invention when performing defrosting;

[0034] Among them, 1-water storage tank, 2-cold water inlet, 3-hot water outlet, 4-combustion unit, 5-gas heating heat exchange tube, 501-main heat exchange tube, 502-circulating heat exchange tube, 503-smoke condenser, 6-smoke discharge pipeline, 7-compressor, 8-heat pump heating heat exchanger, 9-evaporator, 10-heat pump heating circulation outlet, 11-heat pump heating circulation return water outlet, 12-smoke diversion chamber, 13-smoke condenser, 14-top installation cover, 15-bottom installation cover, 16-heat dissipation hole, 17-external Cylinder, 18-closed base, 19-positioning connecting piece, 20-limited support beam, 21-four-way valve, 22-circulating pump, 23-expansion valve, 24-mounting frame, 2401-back plate, 2402-side plate, 2403-top plate, 2404-bottom plate, 25-partition, 2501-first partition, 2502-second partition, 2503-third partition, 26-gas air inlet, 27-heat pump air inlet, 28-evaporator fan, 29-safety valve port, 30-drain valve port, 31-cleaning port. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0036] Example 1

[0037] like Figures 1 to 6 The dual-energy water heating device shown comprises a water tank 1, a gas heating module and a heat pump heating module. The water tank 1 is provided with a cold water inlet 2 and a hot water outlet 3. The gas heating module comprises a combustion unit 4 and a gas heating heat exchange pipe 5. The combustion unit 4 is installed above the water tank 1. The gas heating heat exchange pipe 5 is installed in the water tank 1 and connected to the combustion unit 4. The gas heating heat exchange pipe 5 is connected to a flue gas exhaust pipe 6. The heat pump heating module 2 comprises a compressor 7, a heat pump heating heat exchanger 8 and an evaporator 9. The compressor 7, the heat pump heating heat exchanger 8 and the evaporator 9 are connected in a cycle in sequence. The water tank 1 is also provided with a heat pump heating circulation outlet 10 and a heat pump heating circulation return water port 11. The heat pump heating circulation outlet 10 and the heat pump heating circulation return water port 4 are respectively connected to the heat pump heating heat exchanger 8 through pipelines.

[0038] like Figure 7 and Figure 8As shown, the dual-energy water heating device in this embodiment is provided with a separate gas heating module and a heat pump heating module, and two independent heat exchange systems are provided based on the different heating principles of the two heating modules. The gas heating module has a high instantaneous heating capacity and a fast temperature rise, so the gas heating heat exchange pipe 5 is directly arranged in the water storage tank 1 to ensure the maximum heat exchange efficiency, which can be used for rapid reheating; on the other hand, the heat pump heating module adopts an external mode, and the water in the water storage tank 1 flows through the heat pump heating heat exchanger 8 in the heat pump heating module 2 through the heat pump heating circulation outlet 10, so as to realize heat exchange from the heat pump heating The circulating water return port 11 flows back to the water storage tank 1. Since the heat exchange continuity of the heat pump heating module is high, it can be used for thermal insulation energy consumption or hot water circulation. The present invention adopts a combined operation mode of gas + heat pump. When a small amount of water is used (thermal insulation energy consumption or hot water circulation), only the heat pump heating module can be used to work. When a large amount of water is used, the gas heating module is started to achieve rapid reheating. When cold water is heated for the first time, it can also run at the same time. The control is relatively simple. The two sets of heat exchange systems used in the present invention can not only ensure the long-term operation of the heat exchange system, but also improve the heat exchange efficiency of different heat exchange systems in different heating systems.

[0039] It should be noted that the combustion unit 4 in this embodiment includes a burner body, a combustion chamber, a blower, an air inlet and a gas inlet, and its basic connection mechanism is: the blower, the air inlet and the gas inlet are installed on the outside of the water tank 1, and the blower is connected to the air inlet and the gas inlet; the combustion chamber is installed in the gas heating heat exchange tube 5, and the upper end of the combustion chamber is connected to the blower; since the structure of the burner 4 is not the focus of this technical solution, its specific structure and working principle will not be repeated in this embodiment.

[0040] More specifically, regarding gas heating modules, such as Figure 4 As shown, the gas heating heat exchange tube 5 in this embodiment includes a main heat exchange tube 501, a circulating heat exchange tube 502 and a flue gas condensation tube 503. A flue gas diversion chamber 12 is arranged above the water tank 1, and a flue gas condensation chamber 13 is arranged below the water tank 1. The upper end of the main heat exchange tube 501 passes through the water tank 1 and is connected to the combustion unit 4. The lower end of the main heat exchange tube 501 extends to the bottom of the water tank 1 and is connected to the lower end of the circulating heat exchange tube 502. The upper end of the circulating heat exchange tube 502 is connected to the flue gas diversion chamber 12, and the two ends of the flue gas condensation tube 503 are respectively connected to the flue gas diversion chamber 12 and the flue gas condensation chamber 13, and the lower end of the flue gas condensation chamber 13 is connected to the flue gas exhaust pipe 6.

[0041] The gas heating module in this embodiment adopts a top-burning combustion method, and its working principle is as follows: the hot flue gas generated by the combustion of the combustion unit 4 first flows from the upper part of the water tank 1 to the bottom of the water tank 1 through the main heat exchange pipe 501 to achieve the first heat exchange, and then flows from the bottom of the water tank 1 to the upper part of the water tank 1 through the circulating heat exchange pipe 502 and enters the flue gas diversion chamber 12 to achieve secondary heat exchange. At this time, the flue gas with residual heat flows from the upper part of the water tank 1 to the lower part of the water tank 1 through the flue gas condensation pipe 503 and enters the flue gas condensation chamber 13 to achieve heat exchange again. At this time, the flue gas that has completed the heat exchange is finally discharged through the flue gas exhaust pipe 6, which can realize three heat exchange processes, so that the hot flue gas generated by the combustion can fully exchange heat with the water in the water tank 1, thereby improving the heat exchange efficiency while reducing heat loss and reducing resource waste.

[0042] Furthermore, in order to ensure uniform heat exchange between the gas heating heat exchange tube 5 and the cold water in the water tank 1 and improve the heat exchange efficiency, the main heat exchange tube 501 is arranged at the center of the water tank 1, and a plurality of circulating heat exchange tubes 502 and flue gas condensation tubes 503 are arranged, and the plurality of circulating heat exchange tubes 502 and flue gas condensation tubes 503 are orderly distributed around the main heat exchange tube 501. In the present embodiment, four circulating heat exchange tubes 502 are arranged, and eight flue gas condensation tubes 503 are arranged; and in order to ensure that the flue gas at the end of heat exchange and the condensed water generated by heat exchange in the flue gas condensation tube 503 can be discharged faster, the flue gas condensation chamber 13 is arranged to be funnel-shaped.

[0043] Among them, it should be clarified that in order to adapt to the gradual decrease in the heat contained in the combustion flue gas during the heat exchange process, the diameters of the main heat exchange tube 501, the circulating heat exchange tube 502, and the flue gas condensing tube 503 are also set in a decreasing manner; and it should be noted that in this embodiment, the main heat exchange tube 501, the circulating heat exchange tube 502 and the flue gas condensing tube 503 are all straight tubes, but in more embodiments, while meeting the water storage capacity of the water tank 1, it can also use spiral tubes, S tubes, etc.

[0044] More specifically, regarding the heat pump heating module, such as Figure 5 As shown, the medium outlet end of the compressor 7 in this embodiment is connected to the evaporator 9 and the heat pump heating heat exchanger 8 through a four-way valve 21; a circulating pump 22 for providing power to the circulating water is provided on the connecting pipe between the heat pump heating heat exchanger 8 and the heat pump heating circulating water outlet 10; an expansion valve 23 for throttling, pressure reduction and flow regulation is provided on the connecting pipe between the heat pump heating heat exchanger 8 and the evaporator 9.

[0045] The working principle of the heat pump heating module in this embodiment is as follows: Figure 7As shown, after the low-pressure refrigerant is compressed by the compressor 7, it becomes a high-temperature and high-pressure gas and is discharged. The high-temperature and high-pressure refrigerant gas flows through the heat pump heating heat exchanger 8, and transfers its own heat to the circulating water from the water storage tank 1 that also flows through the heat pump heating heat exchanger 8. The refrigerant cooled down after heat exchange becomes liquid under the continuous action of pressure, and then enters the evaporator 203 after passing through the expansion valve 23. The function of the evaporator 9 is that when the outside air flows through the outer surface of the evaporator 9, the heat contained in it will be absorbed by the evaporator 9, and the liquid refrigerant entering the evaporator 9 will quickly evaporate into a gaseous state under pressure, and absorb a large amount of heat in the evaporator 9. Then the refrigerant that has absorbed a certain amount of energy flows back to the compressor 7 and enters the next cycle; as shown in FIG. Figure 8 As shown, the function of the four-way valve 21 is to change the movement direction of the refrigerant medium and swap the evaporator 9 and the heat pump heating heat exchanger 8, so that the high-temperature medium compressed by the compressor 7 will directly enter the evaporator 9 to defrost the evaporator 9.

[0046] Furthermore, the heat pump heating heat exchanger 8 in this embodiment adopts a shell-and-tube heat exchanger, which includes an inner tube and an outer tube. The two ends of the inner tube are respectively connected to the heat pump heating cycle water outlet 10 and the heat pump heating cycle return water outlet 11 on the water storage tank 1 through pipes. The water flowing in the inner tube is the water to be heated, and the two ends of the outer tube are respectively connected to the evaporator 9 and the compressor 7 through pipes. The cold medium flowing in the outer tube is the cold medium for heat exchange. It should be noted that the flow direction of the materials in the inner tube and the outer tube is reverse.

[0047] In addition, in order to ensure that the dual-energy water heating device in this embodiment can work normally and safely, a safety valve port 29 for automatic pressure relief and a drain valve port 30 for manual drainage are also provided on the water tank 1. It should be clear that the safety valve port 29 is used to install a safety valve, which automatically opens to relieve pressure when the internal pressure of the water tank 1 is abnormal, and its position is set in the upper area of ​​the water tank 1. The drain valve port 30 is used to install a drain valve, which is mainly used to manually discharge the residual water in the water tank 1, and its position is set in the lower area of ​​the water tank 1; the water tank 1 is also provided with a cleaning port 31, which is mainly used for manual cleaning of the inside of the water tank 1; further, temperature sensors are installed at the upper and lower positions of the water tank 1, which are mainly used to detect the water temperature of the upper and lower parts of the water tank 1, so as to control the operation of different heating modules; in order to protect the water tank 1 and the gas heating heat exchange tube 5 and prevent the adhesion of a large amount of water alkali and scale, an electronic anode and a magnesium rod are also installed on the water tank 1, both of which can inhibit scale, so as to alleviate the corrosion of scale on the water tank 1 and the gas heating heat exchange tube 5, and enhance the insulation effect of the water tank 1.

[0048] Example 2

[0049] This embodiment is a further supplement to Embodiment 1. In order to realize the overall integration of the device and the aesthetic appearance, the gas heating module in this embodiment is also provided with a top mounting cover 14 and a bottom mounting cover 15 adapted to the water storage tank 1. The top mounting cover 14 is installed above the flue gas diversion chamber 12 and covers the combustion unit 4. Heat dissipation holes 16 are provided on the top mounting cover 14. In this embodiment, the heat dissipation holes 16 are dense small holes. The bottom mounting cover 15 is installed below the water storage tank 1 and covers the flue gas condensation chamber 13 and the flue gas exhaust pipe 6.

[0050] Furthermore, in order to ensure the beauty of the overall appearance of the device and the safety of the water tank 1, an outer cylinder 17 is also provided, and the outer cylinder 17 is sleeved on the water tank 1 and the bottom mounting cover 15, and the upper end of the outer cylinder 17 is connected to the lower end of the top mounting cover 14, and the lower end of the outer cylinder 17 is installed with a closed base 18; and in order to facilitate the positioning and installation of the bottom mounting cover 15, a plurality of positioning connecting pieces 19 for positioning the bottom mounting cover 15 are also provided on the upper end surface of the closed base 18, and at the same time, in order to improve the load-bearing capacity of the base and facilitate the installation of the device For transportation and transfer, at least two load-bearing and limiting beams 20 parallel to each other and arranged at intervals are fixedly installed on the lower end surface of the closed base 18. In the present embodiment, there are two load-bearing and limiting beams 20 in total, and the interval space between the two load-bearing and limiting beams 20 can be used as an insertion space for a forklift fork. When the whole machine needs to be transported and transferred, the forklift can be controlled to insert its fork into the interval space between the load-bearing and limiting beams 20 under the closed base 18. The load-bearing and limiting beams 20 limit the fork from sliding left and right to prevent the fork from tipping over when the whole machine is lifted.

[0051] It can be foreseen that, in order to facilitate the user to check the water temperature in the water tank 1 in real time, a display screen is also provided on the top mounting cover 14 in this embodiment, which is mainly used to receive and display the water temperature signal.

[0052] Example 3

[0053] This embodiment is a further supplement to Embodiment 1. The heat pump heating module in this embodiment also includes a mounting frame 24, and the mounting frame 24 is fixedly connected to the outer wall of the water tank 1. The side of the mounting frame 24 connected to the water tank 1 is open; a plurality of partitions 25 are horizontally arranged in the mounting frame 24, and the plurality of partitions 25 form a multi-layer installation space in the mounting frame 24, and the compressor 7, the heat pump heating heat exchanger 8 and the evaporator 9 are respectively installed in a separate layer of the installation space.

[0054] More specifically, the mounting frame 24 includes a back plate 2401, a side plate 2402, a top plate 2403 and a bottom plate 2404. The two sides of the back plate 2401 are connected to the two side plates 2402 by a column respectively. The top plate 2403 and the bottom plate 2404 are connected to the back plate 2401, the side plates 2402 and the columns by screws. In order to reduce the production difficulty of the mounting frame 24, the back plate 2401 and the side plates 2402 are set as an upper and lower two-section type, and the upper and lower parts are mutually clamped; the partition 25 includes a first partition 251, a second partition 252 and a third partition 253. The first partition 251 and the top plate 2403 form a first partition for installing the air inlet pipe of the combustion unit 4. An installation space is formed, and a gas air inlet 26 is provided on the side plate 2402 corresponding to the first installation space area; a second installation space for installing the evaporator 9 is formed between the second partition plate 2502 and the first partition plate 2501, and a heat pump air inlet 27 is provided on the side plate 2402 corresponding to the second installation space area; a third installation space for installing the heat pump heating heat exchanger 8 is formed between the third partition plate 2503 and the second partition plate 2502, and the heat pump heating heat exchanger 8 is fixed on the third partition plate 2503 through a heat exchanger base; a fourth installation space for installing the compressor 7 is formed between the third partition plate 253 and the bottom plate 2404, and the compressor 7 is fixed on the bottom plate 2404 through a compressor base.

[0055] In this embodiment, the mounting frame 24 is rectangular as a whole and is attached to the water tank 1. In order to facilitate the installation of the mounting frame 24 and the overall appearance of the device, the connecting side of the mounting frame 24 and the water tank 1 is set to a shape that is compatible with the outer wall of the water tank 1. The specific setting of this embodiment is an arc shape. Of course, technical personnel in this field can design it into other shapes according to actual conditions.

[0056] In this embodiment, the compressor 7, the heat pump heating heat exchanger 8 and the evaporator 9 are integrated and assembled by means of the mounting frame 24, and a plurality of partitions 25 are arranged in the mounting frame 24 to form a corresponding multi-layer mounting space for the separate assembly of each component. This not only achieves the integration and unification of all components in the mounting frame, improves the structural integration of the heat pump heating module 2, and enables the overall device to be standardized and productized; but also achieves the modularization of different components in different mounting spaces, which is convenient for workers to modularly assemble the components, and also has a clearer understanding of the connection between the components, thus avoiding errors, and is also convenient for the systematic management and maintenance of the modular components.

[0057] Furthermore, in order to increase the contact area between the evaporator 9 and the outside air, the heat pump heating module in this embodiment sets the evaporator 9 between the first partition plate 2501 and the second partition plate 2502, and installs it close to the back plate 2401, and a heat pump air inlet 27 is opened on the side plate 2402 corresponding to the second installation space area. The outside air enters the second installation space area through the heat pump air inlet 27 and absorbs heat under the action of the evaporator 9; in order to ensure that the outside air can flow through the surface of the evaporator 9 in large quantities, a heat pump air inlet 27 is opened on the back plate 2401 corresponding to the evaporator 9. 9 is installed with an evaporator fan 28. More specifically, a fan installation opening is provided on the back panel 2401 at the installation position corresponding to the evaporator 9. The evaporator fan 28 is installed at the fan installation opening through a fan mounting seat. Both ends of the fan mounting seat are fixed to two columns in the mounting frame 24 by screws. When the evaporator fan 28 is working, it blows air outward, which can speed up the discharge of air in the second installation space, thereby allowing the outside air to be continuously and quickly sucked in from the heat pump air inlet 27, thereby realizing rapid air circulation.

[0058] It should be noted that all components and connecting pipes in the heat pump heating module are fixedly mounted on the mounting frame 24 and the partition plate 25 through intermediate connecting parts such as mounting columns, slings, and connecting plates.

[0059] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dual energy water heating device, comprising a water storage tank (1), a gas heating module and a heat pump heating module, wherein the water storage tank (1) is provided with a cold water inlet (2) and a hot water outlet (3), characterized in that: The gas heating module comprises a combustion unit (4) and a gas heating heat exchange pipe (5), wherein the combustion unit (4) is installed above the water storage tank (1), the gas heating heat exchange pipe (5) is installed in the water storage tank (1) and connected to the combustion unit (4), and the gas heating heat exchange pipe (5) is connected to a flue gas exhaust pipe (6); the heat pump heating module comprises a compressor (7), a heat pump heating heat exchanger (8) and an evaporator (9), wherein the compressor (7), the heat pump heating heat exchanger (8) and the evaporator (9) are connected in a cycle in sequence; the water storage tank (1) is also provided with a heat pump heating circulation water outlet (10) and a heat pump heating circulation water return port (11), wherein the heat pump heating circulation water outlet (10) and the heat pump heating circulation water return port (11) are respectively connected to the heat pump heating heat exchanger (8) through pipelines.

2. The dual energy water heater according to claim 1, characterized in that: The gas heating heat exchange pipe (5) comprises a main heat exchange pipe (501), a circulating heat exchange pipe (502) and a flue gas condensation pipe (503); a flue gas diversion chamber (12) is arranged above the water storage tank (1); a flue gas condensation chamber (13) is arranged below the water storage tank (1); the upper end of the main heat exchange pipe (501) passes through the water storage tank (1) and is connected to the combustion unit (4); the lower end of the main heat exchange pipe (501) extends to the bottom of the water storage tank (1) and is connected to the lower end of the circulating heat exchange pipe (502); the upper end of the circulating heat exchange pipe (502) is connected to the flue gas diversion chamber (12); the two ends of the flue gas condensation pipe (503) are respectively connected to the flue gas diversion chamber (12) and the flue gas condensation chamber (13); the lower end of the flue gas condensation chamber (13) is connected to the flue gas exhaust pipe (6).

3. The dual energy water heater according to claim 2, characterized in that: It also includes a top-mounted cover (14) and a bottom-mounted cover (15) adapted to the water storage tank (1), wherein the top-mounted cover (14) is mounted above the flue gas diversion chamber (12) and covers the combustion unit (4), and heat dissipation holes (16) are provided on the top-mounted cover (14); and the bottom-mounted cover (15) is mounted below the water storage tank (1) and covers the flue gas condensation chamber (13) and the flue gas exhaust pipe (6).

4. The dual energy water heater according to claim 3, characterized in that: It also comprises an outer cylinder (17), wherein the outer cylinder (17) is sleeved on the water storage tank (1) and the bottom mounting cover (15), and the upper end of the outer cylinder (17) is connected to the lower end of the top mounting cover (14), and the lower end of the outer cylinder (17) is installed with a closed base (18).

5. The dual energy water heater according to claim 4, characterized in that: The upper end surface of the closed base (18) is provided with a plurality of positioning connecting pieces (19) for positioning the bottom mounting cover (15), and the lower end surface of the closed base (18) is fixedly provided with at least two mutually parallel and spaced load-bearing limiting beams (20).

6. The dual energy water heater according to claim 1, characterized in that: The medium outlet end of the compressor (7) is connected to the evaporator (9) and the heat pump heating heat exchanger (8) via a four-way valve (21); a circulation pump (22) is provided on the connecting pipe between the heat pump heating heat exchanger (8) and the heat pump heating circulation water outlet (10); and an expansion valve (23) is provided on the connecting pipe between the heat pump heating heat exchanger (8) and the evaporator (9).

7. The dual energy water heater according to claim 6, characterized in that: The heat pump heating module further comprises a mounting frame (24), wherein the mounting frame (24) is fixedly connected to the outer side wall of the water storage tank (1), and the side of the mounting frame (24) connected to the water storage tank (1) is open; a plurality of partitions (25) are horizontally arranged in the mounting frame (24), and the plurality of partitions (25) form a plurality of layers of installation spaces in the mounting frame (24), and the compressor (7), the heat pump heating heat exchanger (8) and the evaporator (9) are respectively installed in a single layer of installation space.

8. The dual energy water heater according to claim 7, characterized in that: The mounting frame (24) comprises a back plate (2401), a side plate (2402), a top plate (2403) and a bottom plate (2404); the partition plate (25) comprises a first partition plate (2501), a second partition plate (2502) and a third partition plate (2503); a first mounting space for mounting an air inlet pipe of the combustion unit (4) is formed between the first partition plate (2501) and the top plate (2403); a gas air inlet (26) is provided on the side plate (2402) corresponding to the first mounting space area; A second installation space for installing the evaporator (9) is formed between the second partition plate (2502) and the first partition plate (2501), and a heat pump air inlet (27) is opened on the side plate (2402) corresponding to the second installation space area; a third installation space for installing the heat pump heating heat exchanger (8) is formed between the third partition plate (2503) and the second partition plate (2502); and a fourth installation space for installing the compressor (7) is formed between the third partition plate (2503) and the bottom plate (2404).

9. The dual energy water heater according to claim 8, characterized in that: The evaporator (9) is disposed between the first partition plate (2501) and the second partition plate (2502), and is installed close to the back plate (2401). An evaporator fan (28) is installed on the back plate (2401) at a position corresponding to the installation position of the evaporator (9).

10. The dual energy water heater according to any one of claims 1 to 9, characterized in that: The water storage tank (1) is also provided with a safety valve port (29) for automatic pressure relief, a drainage valve port (30) for manual drainage, and a cleaning port (31) for cleaning the water tank.

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