Multi-condition energy-saving gas heating and hot water boiler

Abstract

The present invention provides a multi-condition energy-saving gas heating and hot water furnace, which includes a housing, a heating chamber, a water tank arranged inside the housing, and a water inlet end and a water outlet end located on the side of the housing. It also includes a first fluid passage and a second fluid passage located inside the housing and connected in parallel to the water inlet end and the water outlet end, and the water tank is connected to the second fluid passage; a combustion device connected to an external gas pipe is arranged in the heating chamber, at least one heat conduction device extending into the water tank is arranged on the inner wall of the heating chamber, and the first fluid passage is arranged in parallel with the combustion device. The multi-condition energy-saving gas heating and hot water furnace can achieve the adaptation work of multiple conditions of heat with high efficiency, large flow rate, high hot water to small flow rate and lower temperature through the synergistic effect of two fluid passages, and can provide heating for floor heating / radiators with small flow rate, stable and low energy consumption, and supply water for dishwashing / showering with large flow rate and higher heat by one hot water furnace, and utilize the switching of such multiple conditions to achieve the balance of water supply efficiency and energy consumption.

Description

Technical Field

[0001] The present invention relates to the field of gas heating and hot water boilers, and more particularly to a multi-condition energy-saving gas heating and hot water boiler. Background Art

[0002] Gas heating and hot water boilers have a powerful central heating function for families and can meet the heating needs of multiple rooms. The heating function of gas heating and hot water boilers is affected by two factors: local climate conditions and the insulation status of buildings. Most of the existing gas heating and hot water boilers are of the direct cold water heating type, without a water tank to reduce the volume and heat energy loss. And to meet the demand for simultaneous use of all heating devices, the heating mechanism must be made into a high-power type. However, when only a small number of heating devices are in use, the high-power heating mechanism consumes more energy compared to a lower-power heating mechanism. If a low-power heating mechanism is used for energy conservation, a water tank is required to store water to meet the large water consumption. The disadvantage of water storage in the tank is that the water temperature will gradually decrease after heating, resulting in heat energy loss. In the case of a large amount of relatively high-temperature water needed in a short time, such as taking a bath or a soak bath, the water supply capacity is limited by the water storage capacity, especially in a large house or when there are a large number of users, it cannot meet the immediate use demand. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a multi-condition energy-saving gas heating and hot water boiler. The multi-condition energy-saving gas heating boiler can conveniently adjust the operating water heating conditions according to different hot water volume / water temperature usage requirements, thereby having a high water supply efficiency and good gas energy consumption performance. Specifically, the multi-condition energy-saving gas heating and hot water boiler can achieve the water supply work for various conditions, such as stable water supply with a large flow rate to low-consumption water supply with a small flow rate, through the synergistic effect of dynamically adjusting the water supply volume of two fluid passages. That is, it can realize that one hot water boiler can meet the water supply for floor heating / radiators with a small flow rate, stable and low energy consumption, and the water supply for dishwashing / bathing with a large flow rate and high temperature, and achieve the balance of water supply efficiency and energy consumption through the switching of such multi-conditions.

[0004] The specific technical solution of the present invention is as follows. A multi-condition energy-saving gas heating and hot water boiler includes a housing, a heating chamber, a water tank provided in the housing, and an inlet end and an outlet end located on the side of the housing. It also includes a first fluid passage and a second fluid passage located in the housing and connected in parallel to the inlet end and the outlet end. The water tank is connected in the second fluid passage; a combustion device connected to an external gas pipe is provided in the heating chamber, at least one heat conduction device extending into the water tank is provided on the inner wall of the heating chamber, and the first fluid passage is arranged in parallel with the combustion device.

[0005] Thus, different operating conditions can be provided through the first fluid passage (parallel to the combustion device for direct heating) and the second fluid passage (connected to the water tank and heating the water in the water tank through a heat conduction device) by direct heating and indirect heating respectively, that is, there are at least the following two operating conditions at two levels: when heating a floor heating / radiator with a small flow rate, stable and low energy consumption is required, the combustion device operates at a low power, heats the water in the upper water tank through the heat conduction device, and provides sufficient heat for heating with lower energy consumption. At this time, water is supplied only through the second fluid passage; when supplying water for dishwashing / bathing with a large flow rate and higher heat, external water is directly supplied into the first fluid passage to be directly heated, so as to provide water supply with a large flow rate and high temperature. At this time, water is supplied only through the first fluid passage. Further, the mixed outflow of high and low temperature water can be realized by controlling the flow rate between the two parallel fluid passages, so as to realize more levels of operating conditions. During operation, the supply amount of hot water is mainly ensured by the large capacity of the water tank. The direct heating of the first fluid passage can provide higher temperature and larger flow rate, while ensuring the water supply temperature and supply amount.

[0006] As a further preference of the present invention, the heat conduction device includes a receiving cavity and at least one heat conduction tube that forms a loop by connecting the receiving cavity through a first connection end and a second connection end. The receiving cavity is partially filled with a refrigerant. The port of the first connection end is located at the upper end of the receiving cavity, and the port of the second connection end is located below the liquid level of the refrigerant.

[0007] Thus, the refrigerant absorbs the heat in the heating chamber in the receiving cavity and vaporizes, and enters the heat conduction tube through the first connection end. When the gaseous refrigerant flowing in the heat conduction tube enters the section located in the water tank, it exchanges heat with the water in the water tank and liquefies, so as to achieve the heat transfer effect. Therefore, compared with a simple copper core heat pipe, it has a better heat transfer effect and can operate in a lower energy consumption state (as long as the refrigerant has heat supply, it can realize the gas-liquid transformation, and a simple copper core cannot achieve the heating effect of a long path into the water tank at a lower temperature). Further, the arrangement of the first connection end and the second connection end in the height direction enables the one-way circulation of the entire heat conduction tube to be realized through the hydraulic action of the refrigerant, that is: the vaporized refrigerant has a smaller density and directly enters the heat conduction tube upward from the first connection end. At the same time, the air pressure of the gaseous refrigerant makes the refrigerant droplets that condense in advance in the heat conduction tube also move in the direction of the second connection end under pressure, so as to realize the one-way gas-liquid flow and circulation. The refrigerant therein can be one of freon, ammonia, and acetone. Especially during the heat preservation process after heating in the water tank, the characteristics of the refrigerant enable continuous heat supply and heat preservation to the water as long as the gas-liquid heat exchange cycle is maintained, rather than realizing heat preservation through the repeated heating-cooling method of boiling water, which has better equipment life friendliness and low energy consumption performance.

[0008] As a further preference of the present invention, the heat conduction tube further includes a first pipe section, a second pipe section and a third pipe section. The first pipe section and the third pipe section are respectively integrally extended from the first connection end and the second connection end towards the water tank. The second pipe section extends into the water tank and its two ends are respectively connected to the first pipe section and the third pipe section. A heat insulation layer is disposed around the outer walls of the first pipe section and the third pipe section.

[0009] Thus, the loop for realizing the unidirectional circulation is realized by three different pipe sections. By disposing a heat insulation layer around the first pipe section and the third pipe section (especially the first pipe section), the refrigerant will not exchange heat with the external air on the moving path, resulting in a decrease in heating efficiency.

[0010] As a further preference of the present invention, it is characterized in that: the second pipe section includes a first branch pipe, a second branch pipe and a third branch pipe. The first branch pipe and the third branch pipe respectively extend into the water tank from the ends of the first pipe section and the third pipe section. The second branch pipe is a bent pipe with its two ends respectively connected to the first branch pipe and the third branch pipe.

[0011] Thus, the second pipe section presents a bent pipeline with a large contact surface in the water tank through the structure of the combination of three branch pipes, having good heat exchange efficiency and improving the heating effect on the water in the large-capacity water tank.

[0012] As a further preference of the present invention, the first branch pipe extends obliquely downward from its connection end with the first pipe section to the horizontal plane, and the third branch pipe extends obliquely upward from its connection end with the third pipe section to the horizontal plane.

[0013] Thus, according to the principle of liquefaction heat exchange of the refrigerant, after the gaseous refrigerant enters the first branch pipe, it starts to exchange heat with the low-temperature water on the inner wall and the outer wall to heat the water, that is, it is converted from gaseous state to liquid state and releases heat to heat the water. The liquefied refrigerant droplets, under the action of the structure of the first branch pipe and the third branch pipe and the action of gravity, can flow naturally towards the third pipe section to realize the return flow. Thus, the entire heat conduction tube structure can complete the self-circulation without structures such as one-way valves and pumps, with simple structure, high heat exchange efficiency and low energy consumption.

[0014] As a further preference of the present invention, the heating chamber includes an exhaust plate and an intake plate which are oppositely disposed up and down, and side plates which are respectively disposed around the edges of the exhaust plate and the intake plate at the upper and lower ends. The combustion device and the first fluid passage are horizontally linearly extended in the heating chamber.

[0015] Thus, the heating chamber encloses to form a structure where air enters from the lower side to supply combustion for the combustion device and exhausts from the upper side. By enclosing, it provides heat preservation ability within a certain area, enabling better heating of the first fluid passage and the accommodation chamber. The linear arrangement of the combustion device and the first fluid passage makes the layout structure simpler and the heating efficiency higher.

[0016] As a further preference of the present invention, the combustion device includes a base body and multiple groups of burners arranged side by side on the surface of the base body along its linear extension direction. At least one group of the multiple groups of burners points to the first fluid passage. The base body is connected to the gas pipe through a regulating valve, and each group of burners is connected to the regulating valve in parallel.

[0017] Thus, through the regulating valve, the combustion of multiple groups of burners with controllable quantity and gas flow can be realized, so as to provide different heating powers under different working conditions and achieve high-efficiency and low-energy consumption operation.

[0018] As a further preference of the present invention, the side plate is inclined inward from the connection with the air inlet plate to the connection with the exhaust plate, and the side of the accommodation chamber is attached to the inner side of the side plate.

[0019] Thus, a structure is formed where the cross-sectional area of the gas flow path gradually decreases from the air inlet to the exhaust direction. Therefore, the chimney effect can be further realized in the heating chamber by combining the principle of different stratifications of cold and hot air densities. The structure with a gradually decreasing cross-section can make the gas flow rate gradually increase as the cross-section decreases, further strengthening the chimney effect and improving the operation efficiency of the intake and exhaust of combustion heating.

[0020] As a further preference of the present invention, the inner surface of the heating chamber is provided with a reflective layer and a heat insulation layer that at least cover the surfaces of the side plate and the air inlet plate. The heat insulation layer is arranged between the reflective layer and the inner surface of the heating chamber.

[0021] Thus, the reflective layer can provide the effect of reflecting the heat generated by the combustion of the combustion device to reduce heat dissipation. At the same time, the reflected heat acting on the first fluid passage and the accommodation chamber can also improve the heating thermal efficiency. The further setting of the heat insulation layer can prevent heat from dissipating outward and further improve the thermal efficiency.

[0022] As a further preference of the present invention, three-way flow control valves are respectively provided at the parallel connection joints at both ends of the first fluid passage and the second fluid passage, and a temperature sensor is provided at the water outlet end.

[0023] Thus, by setting up a temperature sensor, the temperature of the water flow mixed in the first fluid passage and the second fluid passage at the water outlet can be monitored. In cooperation with the set microcomputer control device, a three-way flow control valve near the water outlet can be electrically connected to adjust the water supply amounts of the two fluid passages and thus adjust the water outlet temperature. Further, the three-way flow control valve near the water inlet can control the water flow into the two fluid passages, thereby changing the corresponding on-off working conditions.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. The water supply working conditions can be dynamically adjusted according to different water usage requirements (working conditions), and continuous and highly adaptable working condition adjustment can be achieved through the three-way flow control valve. The water supply speed is fast, the water supply is stable, and the water supply amount is sufficient (there is a water tank to provide reserved hot water);

[0026] 2. It has strong temperature adjustment performance to adapt to different water usage requirements. By adjusting the two parallel fluid passages through the three-way flow control valve, the mixing ratio of the water volume / water temperature is adjusted, thus achieving a multi-stage temperature adjustment effect;

[0027] 3. It has good energy-saving performance. Under low-temperature working conditions, a small amount of gas consumption can heat and keep the water tank warm. At the same time, further using the phase change of the refrigerant gas-liquid to supply heat can more efficiently collect and transfer the waste heat in the heating chamber to keep the water tank warm;

[0028] 4. The connection structure of the accommodating cavity of the heat conduction device realizes the liquid seal of the refrigerant. Without structures such as one-way valves and power pumps, the one-way circulation of the refrigerant can be realized, improving the heat transfer efficiency and having a simple structure;

[0029] 5. The chimney effect structure and the heat insulation and reflection structure provided by the heating chamber provide good heating effects and high thermal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the overall structural schematic diagram of the present invention;

[0031] Figure 2 is the structural schematic diagram at the heating chamber of the present invention;

[0032] Figure 3 is the side view structural schematic diagram at the accommodating cavity of the present invention;

[0033] Figure 4 is the structural schematic diagram at the second pipe section of the present invention;

[0034] Figure 5 is the front view cross-sectional structural schematic diagram at the combustion device of the present invention;

[0035] Figure 6 is the side view cross-sectional structural schematic diagram at the combustion device of the present invention;

[0036] The marks in the figure are as follows: 1 - housing, 11 - water inlet end, 12 - water outlet end, 2 - heating chamber, 21 - exhaust plate, 22 - intake plate, 23 - side plate, 24 - reflective layer, 25 - heat insulation layer, 3 - water tank, 4 - first fluid passage, 5 - second fluid passage, 6 - combustion device, 61 - matrix, 62 - burner, 63 - regulating valve, 64 - gas pipe, 7 - heat conducting device, 71 - accommodating cavity, 72 - first connection end, 73 - second connection end, 74 - heat conducting pipe, 741 - first pipe section, 742 - second pipe section, 7421 - first branch pipe, 7422 - second branch pipe, 7423 - third branch pipe, 743 - third pipe section, 744 - heat preservation layer, 75 - refrigerant, 81 - three - way flow control valve, 82 - temperature sensor. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0038] As Figure 1 、 2 、3, 4, 5, 6 show, the multi - condition energy - saving gas heating and hot - water boiler of this embodiment includes an enclosing housing 1, a heating chamber 2, a water tank 3 fixedly installed in the housing 1 and arranged from bottom to top in sequence, and a water inlet end 11 and a water outlet end 12 arranged on the side of the housing 1. In the case of being provided with a floor heating pipeline / radiator, the water inlet end 11 is connected to the tap water pipeline and the return water pipe of the floor heating / radiator, and the water outlet end 12 is connected to the water - using pipeline in the house. It also includes a first fluid passage 4 and a second fluid passage 5 located in the housing 1 and connected in parallel between the water inlet end 11 and the water outlet end 12. The water tank 3 is connected to the second fluid passage 5, so as to realize the water inlet and outlet of the water tank 3 through the second fluid passage 5. A combustion device 6 connected to an external gas pipe 64 is installed in the heating chamber 2. Two heat conducting devices 7 extending into the water tank 3 are fixedly installed on the inner wall of the heating chamber 2. The first fluid passage 4 is arranged in parallel with the combustion device 6.

[0039] Please refer to Figure 3 , in this embodiment, the heat conducting device 7 includes an accommodating cavity 71 with a cavity - shell structure and a heat conducting pipe 74 that forms a loop by connecting the accommodating cavity 71 through a first connection end 72 and a second connection end 73 (in other preferred implementation manners, there can be two groups or more of heat conducting pipes connected to the accommodating cavity 71 in the same form, so as to provide a higher heating efficiency for the water tank). A part of the internal volume of the accommodating cavity 71 is filled with a refrigerant 75 made of one of freon, ammonia or acetone. The port of the first connection end 72 is hermetically welded to the upper end of the accommodating cavity 71. The end of the second connection end 73 passes through the top of the accommodating cavity 71 and extends into it, and its port is located below the liquid level of the refrigerant 75 and is liquid - sealed.

[0040] In this embodiment, the heat conduction tube 74 further includes a first tube section 741, a second tube section 742, and a third tube section 743 that are sequentially welded to form a sealed connection. The first tube section 741 and the third tube section 743 are integrally extended after welding in the direction of the water tank 3 from the first connection end 72 and the second connection end 73 respectively. The second tube section 742 therebetween extends into the water tank 3 from the side, and its two ends are respectively connected to the first tube section 741 and the third tube section 743. The outer walls of the first tube section 741 and the third tube section 743 are surrounded by a heat insulation layer 744 made of aluminum foil foam.

[0041] Please refer to Figure 4 , in this embodiment, the second tube section 742 includes a first branch tube 7421, a second branch tube 7422, and a third branch tube 7423 that are sequentially welded and connected. The first branch tube 7421 and the third branch tube 7423 respectively extend into the water tank 3 from the ends of the first tube section 741 and the third tube section 743, and they partially extend into the water tank 3. After extending into the water tank 3, the two ends of the second branch tube 7422 are respectively connected to the first branch tube 7421 and the third branch tube 7423, and the second branch tube 7422 as a whole presents a structure that horizontally extends into the water tank 3. The second branch tube 7422 is an approximately semicircular bent tube structure in this embodiment, and in other preferred embodiments, it can be a spiral or other bent tube structures with a larger contact area with the water in the water tank 3.

[0042] In this embodiment, the first branch tube 7421 extends obliquely downward from its connection end with the first tube section 741 to the horizontal plane, and the third branch tube 7423 extends obliquely upward from its connection end with the third tube section 743 to the horizontal plane.

[0043] Please refer to Figure 2 , in this embodiment, the heating chamber 2 has a frustum of a square pyramid structure (it can also be a frustum of a cone or other structures in other preferred embodiments). It includes an exhaust plate 21 and an intake plate 22 that are oppositely arranged up and down, and side plates 23 that are welded and enclosed along the edges of the exhaust plate 21 and the intake plate 22 at the upper and lower ends respectively. Both the exhaust plate 21 and the intake plate 22 are grid plates with purification components such as filter cotton. The exhaust plate 21 extends to the outside through a smoke pipe (not shown in the figure) for exhaust. The combustion device 6 and the first fluid passage 4 are linearly extended in a horizontal straight line structure located in the heating chamber 2, and the combustion device 6 and the first fluid passage 4 are parallel to each other.

[0044] In this embodiment, the side plate 23 is inclined inward from the connection with the intake plate 22 to the connection with the exhaust plate 21, and the side of the accommodating cavity 71 is attached to the inner side of the side plate 23.

[0045] In this embodiment, a reflective layer 24 and a heat insulation layer 25 are provided on the inner surface of the heating chamber 2, covering at least the surfaces of the side plate 23 and the air inlet plate 22. The heat insulation layer 25 is arranged between the reflective layer 24 and the inner surface of the heating chamber 2. The heat insulation layer 25 in this embodiment is an asbestos layer, and the reflective layer 24 is an aluminum foil layer.

[0046] Please refer to Figure 5 , 6 , in this embodiment, the combustion device 6 includes a base body 61 and three groups of burners 62 arranged in parallel along the linear extension direction of the base body 61 (the corresponding ignition device can be a commonly used gas ignition structure (not shown in the figure)). Each group includes a burner structure with a plurality of hole-shaped or nozzle-shaped structures. The base body 61 is in a cuboid structure. Each group of burners 62 extends along the long side direction of the cuboid. The three groups of burners 62 are respectively arranged on the left, right, and upper three sides in the long side direction. The burner 62 located on the upper surface points to the first fluid passage 4, and the burners 62 on the left and right sides point to the accommodating cavities 71 on both sides. The base body 61 is connected to a gas pipe 64 through a regulating valve 63. Each group of burners 62 is connected to the regulating valve 63 in parallel. The regulating valve 63 in this embodiment is composed of a plurality of valve bodies, including a proportional valve located between the connecting pipelines of each group of burners. In other preferred embodiments, it can also be a single two-position multi-way electromagnetic / pneumatic valve structure.

[0047] In this embodiment, an electronically controlled three-way flow control valve 81 is provided at each of the parallel connection joints at both ends of the first fluid passage 4 and the second fluid passage 5. A temperature sensor 82 is provided beside / inside the pipeline of the water outlet end 12. The three-way flow control valve 81, the temperature sensor 82, and the regulating valve 63 are electrically connected through a microcomputer control device.

[0048] During operation, there are at least the following three working conditions:

[0049] The first one: When supplying water to the floor heating / radiator to heat the house, a small flow of hot water circulation is required. At this time, the regulating valve 63 only supplies gas to the burners 62 on the left and right sides of the combustion device 6. The combustion of these two groups of burners 62 mainly heats the accommodating cavity 71. Part of the refrigerant 75 in the accommodating cavity 71 is heated and vaporized, and rises from the first connection end 72 along each section of the heat conduction pipe 74 into the second pipe section 742. In the second pipe section 742, the gaseous refrigerant exchanges heat with the water on the outside and liquefies, heating the water in the heating water tank 3 and then flowing back to the accommodating cavity 71 unidirectionally after liquefaction. During heating, the water circulation is realized through a pump structure connected to the overall heating pipeline. At the same time, the three-way flow control valve 81 makes only the second fluid passage 5 communicate, that is, only the water in the water tank 3 is used for water supply. In the initial operation stage of the device, it is necessary to supplement external tap water into the water tank 3 through the water inlet end 11. After the heating water circuit is filled with water and the circulation is completed, the power of the combustion device 6 can be further reduced to achieve low energy consumption and good temperature maintenance effect during operation.

[0050] The second type: In the case of high-temperature water use with a large flow rate in a short period (such as dishwashing, etc.), the three-way flow control valve 81 enables only the first fluid passage 4 to be connected, and the burner 62 corresponding to the first fluid passage 4 operates with a large gas supply volume to directly burn out hot water with a large flow rate for water supply.

[0051] The third type: In the case of long-term, large-volume and large-flow water use such as bathing, the three-way flow control valve 81 simultaneously connects the first fluid passage 4 and the second fluid passage 5. The main water supply is from the water tank 3, and at the same time, the temperature is adjusted through the flow rate adjustment function of the three-way flow control valve 81 for the freshly boiled water in the first fluid passage 4. Further, a liquid level sensor can be provided in the water tank 3 to adjust the water supply ratio of the two passages through the monitoring of its liquid level, so as to more efficiently and dynamically adjust the energy consumption performance. At the same time, under the supply of the normally heated water in the water tank, the problem of cold water at the beginning of water discharge will not occur during bathing, and the comfort is better.

[0052] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by those of ordinary skill in the art to the technical solution of the present invention should fall within the protection scope of the present invention. The technical content claimed by the present invention has been fully recorded in the claims.

Claims

1. Multi-condition energy-saving gas heating and hot water boiler, comprising a housing (1), a heating chamber (2), a water tank (3) disposed within the housing (1), and a water inlet end (11) and a water outlet end (12) located on the side of the housing (1), characterized in that: It further includes a first fluid passage (4) and a second fluid passage (5) located within the housing (1) and connected in parallel to the water inlet end (11) and the water outlet end (12), and the water tank (3) is connected within the second fluid passage (5); a combustion device (6) connected to an external gas pipe (64) is provided within the heating chamber (2), at least one heat conduction device (7) extending into the water tank (3) is provided on the inner wall of the heating chamber (2), and the first fluid passage (4) is arranged in parallel with the combustion device (6); The heating chamber (2) includes an exhaust plate (21) and an intake plate (22) disposed opposite to each other up and down, and side plates (23) enclosing along the edges of the exhaust plate (21) and the intake plate (22) at the upper and lower ends respectively. The combustion device (6) and the first fluid passage (4) extend horizontally linearly within the heating chamber (2); The combustion device (6) includes a base body (61) and multiple groups of burner nozzles (62) arranged in parallel along the linear extension direction on the surface of the base body (61). At least one group of the multiple groups of burner nozzles (62) points to the first fluid passage (4). The base body (61) is connected to the gas pipe (64) through a regulating valve (63), and each group of the burner nozzles (62) is connected in parallel to the regulating valve (63); Three-way flow control valves (81) are provided at the parallel connection joints at both ends of the first fluid passage (4) and the second fluid passage (5), and a temperature sensor (82) is provided at the water outlet end (12).

2. The multi-condition energy-saving gas heating and hot water boiler according to claim 1, wherein: The heat conduction device (7) includes a receiving cavity (71) and at least one heat conduction pipe (74) forming a loop by communicating the receiving cavity (71) through a first connection end (72) and a second connection end (73). Part of the receiving cavity (71) is filled with a refrigerant (75). The port of the first connection end (72) is located at the upper end of the receiving cavity (71), and the port of the second connection end (73) is located below the liquid level of the refrigerant (75).

3. The multi-condition energy-saving gas heating and hot water boiler according to claim 2, characterized in that: The heat conduction pipe (74) further includes a first pipe section (741), a second pipe section (742), and a third pipe section (743). The first pipe section (741) and the third pipe section (743) respectively extend integrally from the first connection end (72) and the second connection end (73) towards the water tank (3). The second pipe section (742) extends into the water tank (3) and its two ends are respectively connected to the first pipe section (741) and the third pipe section (743). Heat insulation layers (744) are provided around the outer walls of the first pipe section (741) and the third pipe section (743).

4. The multi-condition energy-saving gas heating and hot water boiler according to claim 3, characterized in that: The second pipe section (742) includes a first branch pipe (7421), a second branch pipe (7422), and a third branch pipe (7423). The first branch pipe (7421) and the third branch pipe (7423) respectively extend into the water tank (3) from the ends of the first pipe section (741) and the third pipe section (743). The second branch pipe (7422) is a bent pipe with two ends respectively connected to the first branch pipe (7421) and the third branch pipe (7423).

5. The multi-condition energy-saving gas heating and hot water boiler according to claim 4, characterized in that: The first branch pipe (7421) extends obliquely downward from its connection end with the first pipe section (741) to the horizontal plane, and the third branch pipe (7423) extends obliquely upward from its connection end with the third pipe section (743) to the horizontal plane.

6. The multi-condition energy-saving gas heating and hot water furnace according to claim 2, characterized in that: The side plate (23) is inclined inward from the connection with the intake plate (22) to the connection with the exhaust plate (21), and the side of the accommodation cavity (71) is attached to the inner side of the side plate (23).

7. The multi-condition energy-saving gas heating and hot water boiler according to claim 1, characterized in that: The inner surface of the heating chamber (2) is provided with a reflective layer (24) and a heat insulation layer (25) that at least cover the surfaces of the side plate (23) and the intake plate (22), and the heat insulation layer (25) is provided between the reflective layer (24) and the inner surface of the heating chamber (2).

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