Gas heating water heater and using method thereof

Abstract

The invention discloses a fuel gas heating water heater and a using method thereof, the fuel gas heating water heater comprises a shell, and a combustion chamber is formed in the shell; the main heat exchanger is arranged in the combustion chamber; a plate heat exchanger; a water inlet valve assembly; the pre-heat exchanger is configured to heat water flowing through the water inlet valve assembly by utilizing waste heat of the combustion chamber; heat supply ends of the main heat exchanger and the plate heat exchanger are communicated through a main pipeline to form a heating circulating waterway; the water inlet valve assembly and the pre-heat exchanger are communicated through a pre-heat-exchange pipeline to form a pre-heat-exchange water path; the water inlet valve assembly, the heated end of the plate heat exchanger and the hot water using terminal are communicated through a heat supply pipeline to form a living water flow path. The pre-heat-exchange water path and the living water path are connected in series through the water inlet valve assembly. Tap water flows into the pre-heat exchanger through the water inlet valve assembly to be pre-heated, the heat supply efficiency of the gas heating water heater is improved, and the pre-heated water enters the plate heat exchanger through the water inlet valve assembly to be secondarily heated. And multi-branch expansion of tap water can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and particularly relates to a gas-fired heating and hot water boiler and a method for using the same. Background Art

[0002] At present, gas-fired heating and hot water boilers are commonly used equipment for winter heating in cold regions, and usually have both heating and domestic hot water supply functions.

[0003] A Chinese patent with the publication number CN115654731A discloses a gas-fired heating and hot water boiler, which includes a main body and a control panel. The control panel is fixedly installed on the front of the main body. An exhaust pipe is fixedly connected to the outer wall of the top of the main body. A heat dissipation window is provided on one side of the main body. It further includes: a fixing plate fixedly installed on the rear wall of the main body; a clamping plate fixedly installed on the rear wall of the fixing plate, a combustion furnace, and the clamping plate fixedly connects the combustion furnace through the fixing plate in the middle. A wind box is fixedly installed on the rear wall of the main body; a water inlet structure arranged inside the main body and used for splitting the tap water entering the water inlet structure; an exhaust gas port structure fixedly installed on the top of the combustion furnace and used for pressurizing the internal heat through the exhaust gas port structure; heating pipes fixedly installed inside the combustion furnace. There are three heating pipes, which are equidistantly distributed on the left and right inner walls of the combustion furnace, and the flame inside the combustion furnace can pass through the heating pipes.

[0004] The path of tap water entering the heating boiler in the above gas-fired heating and hot water boiler is relatively single, and the heat in the exhaust pipe of the heating boiler is dissipated into the air, resulting in waste of gas thermal energy. In view of this, how to design a technology that tap water can enter the gas-fired heating and hot water boiler through multiple channels and can make full use of the heat in the exhaust gas of the gas-fired heating and hot water boiler is the technical problem to be solved by the present invention. Summary of the Invention

[0005] The present invention provides a gas-fired heating and hot water boiler and a method for using the same, which can enable tap water to enter the gas-fired heating and hot water boiler through multiple channels and can make full use of the heat in the exhaust gas of the gas-fired heating and hot water boiler.

[0006] To achieve the above technical purpose, the present invention is implemented by adopting the following technical solutions: In one aspect, an embodiment of the present disclosure provides a gas-fired heating and hot water boiler, including: A housing, within which a combustion chamber is formed; A main heat exchanger disposed in the combustion chamber; A plate heat exchanger; An inlet valve assembly; A pre-heat exchanger configured to heat the water flowing through the inlet valve assembly by using the waste heat of the combustion chamber; Among them, the heating ends of the main heat exchanger and the plate heat exchanger are connected through a main pipeline to form a heating circulation water path; the water inlet valve assembly and the pre-heat exchanger are connected through a pre-heat exchange pipeline to form a pre-heat exchange water path; the water inlet valve assembly, the heated end of the plate heat exchanger, and the hot water terminal are connected through a heating pipeline to form a domestic water flow path; the pre-heat exchange water path and the domestic water flow path are connected in series through the water inlet valve assembly.

[0007] In some embodiments of the present application, the gas-fired heating and hot water boiler includes: An exhaust pipe, the exhaust pipe is arranged on the housing and is connected to the air outlet of the combustion chamber, and the pre-heat exchanger is arranged in the exhaust pipe.

[0008] By arranging a pre-heat exchanger in the exhaust pipe, the flue gas discharged from the combustion chamber can heat the pre-heat exchanger, making full use of the heat in the flue gas, which is beneficial to improving the heating efficiency of the gas-fired heating and hot water boiler.

[0009] In some embodiments of the present application, the water inlet valve assembly includes: A valve body, an inlet water flow channel is formed in the valve body, both ends of the inlet water flow channel are respectively connected with a domestic water inlet and a domestic water drain outlet, and the domestic water inlet is connected to the tap water supply end; The valve body is also provided with a connected domestic water return port and a domestic water outlet, the domestic water outlet is connected to the heated end of the plate heat exchanger through the heating pipeline, and the domestic water drain outlet and the domestic water return port are respectively connected to both ends of the pre-heat exchange pipeline.

[0010] By arranging an inlet water flow channel in the valve body, one end of the inlet water flow channel is connected to the domestic water inlet and the other end is connected to the domestic water drain outlet, so that tap water enters the valve body from the domestic water inlet and is discharged from the domestic water drain outlet; the valve body is also provided with a domestic water return port and a domestic water outlet, the domestic water drain outlet and the domestic water return port are connected through a pipeline, so that the water discharged from the domestic water drain outlet exchanges heat with the pre-heat exchanger through the pipeline to pre-heat the tap water in the pipeline and then re-enters the valve body from the domestic water return port, and the domestic water return port is connected to the domestic water outlet, and the domestic water outlet is connected to the plate heat exchanger in the gas-fired heating and hot water boiler, and the pre-heated tap water continues to enter the plate heat exchanger for heating to provide hot water for users.

[0011] In some embodiments of the present application, an intermediate flow channel and a make-up water flow channel are further formed in the valve body. One end of the intermediate flow channel is communicated with the inlet water flow channel, and the other end of the intermediate flow channel is communicated with the make-up water flow channel through a make-up water port. A heating water inlet and a heating water outlet which are communicated with each other are further provided on the valve body. The heating water inlet is connected to the heating end of the plate heat exchanger, and the heating water inlet, the heating water outlet are communicated with the make-up water flow channel.

[0012] By arranging the intermediate flow channel and the make-up water flow channel in the valve body, the intermediate flow channel connects the inlet water flow channel and the make-up water flow channel. The heating water inlet is connected to the heating end of the plate heat exchanger, and the heating water inlet, the heating water outlet are communicated with the make-up water flow channel. In this way, the inlet water flow channel, the intermediate flow channel, and the make-up water flow channel are connected in sequence. When the heating system is installed for the first time or leaks, it is convenient for the valve body to fill water into the heating pipeline system.

[0013] In some embodiments of the present application, a joint is provided at a position corresponding to the make-up water port on the valve body. The joint is communicated with the make-up water flow channel, and the joint is communicated with the intermediate flow channel through the make-up water port. The inlet valve assembly further includes: A make-up water rod assembly, the make-up water rod assembly is threadedly connected to the joint, and an end of the make-up water rod assembly extends into the valve body. When the make-up water rod assembly is rotated, the make-up water rod assembly opens or blocks the make-up water port.

[0014] By arranging a joint at a position corresponding to the make-up water port on the valve body and arranging a make-up water rod assembly on the joint. Among them, the joint is communicated with the make-up water flow channel and the intermediate flow channel. The end of the make-up water rod assembly extends into the valve body and is threadedly connected to the joint. When the make-up water rod assembly is rotated, the make-up water rod assembly opens or blocks the make-up water port. By controlling the make-up water rod assembly, it is convenient to control the opening and closing of the make-up water port.

[0015] In some embodiments of the present application, the make-up water flow channel is arranged to surround the outside of the intermediate flow channel.

[0016] In some embodiments of the present application, the gas heating hot water boiler further includes: A circulation pump, the circulation pump is arranged on the main pipeline.

[0017] By arranging a circulation pump on the main pipeline, power support can be provided for the heating circulation water circuit.

[0018] In some embodiments of the present application, the gas heating hot water boiler further includes: An expansion tank, the expansion tank is arranged on the main pipeline, and the expansion tank is configured to balance the internal pressure of the heating circulation water circuit.

[0019] By setting up an expansion tank, the expansion tank can balance the internal pressure of the heating circulation water circuit and ensure the safety of the heating circulation water circuit.

[0020] In some embodiments of the present application, the hot water terminal includes a faucet and / or a shower head.

[0021] In a second aspect, embodiments of the present disclosure provide a method for using a gas heating hot water boiler as described in any one of the embodiments of the first aspect above, including a hot water mode and a water replenishment mode; In the hot water mode, tap water enters from the domestic water inlet of the inlet valve assembly, is discharged from the domestic water drain outlet, and enters the pre-heat exchanger through the pre-heat exchange pipeline for pre-heating. The pre-heated water flows back to the inlet valve assembly through the domestic water return port and enters the heated end of the plate heat exchanger through the domestic water outlet for heat exchange to provide domestic hot water for the hot water terminal; In the water replenishment mode, the water replenishment port is opened, tap water enters from the domestic water inlet of the inlet valve assembly, passes through the intermediate flow channel and then enters the water replenishment flow channel from the water replenishment port, and enters the heating circulation water circuit through the water replenishment flow channel for water replenishment.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are: by setting up a housing, a main heat exchanger, a plate heat exchanger, an inlet valve assembly and a pre-heat exchanger, a combustion chamber is formed inside the housing, the main heat exchanger is arranged in the combustion chamber, and the heating ends of the main heat exchanger and the plate heat exchanger are connected through a main pipeline to form a heating circulation water circuit; the inlet valve assembly and the pre-heat exchanger are connected through a pre-heat exchange pipeline to form a pre-heated water circuit, and the pre-heat exchanger uses the waste heat of the combustion chamber to heat the water flowing through the inlet valve assembly. The inlet valve assembly, the heated end of the plate heat exchanger and the hot water terminal are connected through a heating pipeline to form a domestic water flow path, and the pre-heated water circuit and the domestic water flow path are connected in series through the inlet valve assembly; that is, tap water flows into the pre-heat exchanger from the inlet valve assembly for pre-heating, and the pre-heated water enters the heated end of the plate heat exchanger through the inlet valve assembly for heat exchange to continue heating the tap water; the tap water is heated twice, which can make full use of resources, improve the heating efficiency of the gas heating hot water boiler, and is conducive to realizing the multi-branch expansion of tap water. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of a gas heating hot water boiler provided by the present invention; Figure 2Schematic structural diagram of a water inlet valve assembly provided by the present invention; Figure 3 Schematic structural diagram of another water inlet valve assembly provided by the present invention; Figure 4 is Figure 3 Cross-sectional view along line A-A; Figure 5 Schematic structural diagram of another water inlet valve assembly provided by the present invention; Figure 6 Schematic structural diagram of another water inlet valve assembly provided by the present invention; Figure 7 is Figure 6 Cross-sectional view along line B-B.

[0025] Explanation of reference numerals in the drawings: Valve body 1, valve main body 11, water inlet flow channel 111, domestic water inlet 112, domestic water drain hole 113, domestic water return port 114, domestic water outlet 115, intermediate flow channel 116, make-up water flow channel 117, make-up water port 118, heating water inlet 119, heating water outlet 120, elbow head 12, joint 121, first end 122, first sealing ring 1221, inner pipe 1222, outer pipe 1223, second end 123, second sealing ring 1224; First temperature sensor 2; Water flow sensor 3; Second temperature sensor 4; Make-up water rod assembly 5, connecting member 51, third sealing ring 511, rod core 52, fourth sealing ring 521, knob 522, guide post 53, fifth sealing ring 531; Combustion chamber 6, burner 61, main heat exchanger 62, pre-heat exchanger 63, exhaust pipe 64; Plate heat exchanger 7, heat supply end 71, heated end 72; Water inlet valve assembly 8; Shell 9, main pipeline 91, pre-heat exchange pipeline 92, heat supply pipeline 93, circulation pump 94, expansion tank 95. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the present invention, unless otherwise clearly specified and defined, the terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0030] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0031] A gas-fired heating and hot water boiler is a water heater that uses gas as the main energy material and transfers the high-temperature heat generated by gas combustion to the cold water flowing through the heat exchanger to achieve the purpose of preparing hot water.

[0032] A gas-fired heating and hot water boiler generally includes a housing, as well as components such as a burner, a heat exchanger, a blower, and a wind hood disposed within the housing.

[0033] Among them, gas is delivered to the burner, and the gas is ignited by an ignition device so that the burner burns the delivered gas, thereby generating heat.

[0034] The heat exchanger is provided with heat exchange tubes. One end of the heat exchange tube is connected to the water supply pipeline, and the other end of the heat exchange tube is connected to a shower head or a faucet, etc.

[0035] The heat generated by the burner burning gas is used to heat the heat exchange tubes, so that the water temperature in the heat exchange tubes rises to form hot water.

[0036] When the gas-fired heating and hot water boiler is working, the cold water provided by the water supply pipeline flows into the heat exchange tubes, and then is heated into hot water by the heat source generated by the burner, and then flows out from the shower head or the faucet through the hot water valve for the user to use.

[0037] At the same time, during the operation of the gas-fired heating and hot water boiler, the blower is powered on and operates simultaneously. Under the action of the blower, the flue gas generated by the burner is discharged to the outside.

[0038] Combined Figures 1 to 7 As shown, in the first aspect, the embodiments of the present disclosure provide a gas-fired heating and hot water boiler, which includes a housing 9, a main heat exchanger 62, a plate heat exchanger 7, a water inlet valve assembly 8, and a pre-heat exchanger 63.

[0039] A combustion chamber 6 is formed within the housing 9; a burner 61 and a main heat exchanger 62 are provided within the combustion chamber 6. The housing 9 is provided with a water inlet joint and a water outlet joint. The main pipeline 91 is connected to the water inlet joint and the water outlet joint. The burner 61 is used to burn gas to heat the main heat exchanger 62.

[0040] The pre-heat exchanger 63 is configured to utilize the waste heat of the combustion chamber 6 to heat the water flowing through the water inlet valve assembly 8; Among them, the heat supply ends 71 of the main heat exchanger 62 and the plate heat exchanger 7 are connected through the main pipeline 91 to form a heating circulation water path; the water inlet valve assembly 8 and the pre-heat exchanger 63 are connected through a pre-heat exchange pipeline 92 to form a pre-heat exchange water path; the water inlet valve assembly 8, the heated end 72 of the plate heat exchanger 7, and the hot water terminal are connected through a heating pipeline 93 to form a domestic water flow path; the pre-heat exchange water path and the domestic water flow path are connected in series through the water inlet valve assembly 8.

[0041] Specifically, by providing a housing 9, a main heat exchanger 62, a plate heat exchanger 7, a water inlet valve assembly 8, and a pre-heat exchanger 63, tap water first enters the water inlet valve assembly 8 and flows from the water inlet valve assembly 8 into the pre-heat exchange pipe 92. The pre-heat exchanger 63 is in communication with the pre-heat exchanger 63 pipe. In this way, the tap water enters the pre-heat exchanger 63 through the pre-heat exchange pipe 92 for pre-heating. After pre-heating, the water flows back to the water inlet valve assembly 8 through the pre-heat exchange pipe 92. Then, the pre-heated tap water flows into the heating pipe 93 through the water inlet valve assembly 8 and flows into the heated end 72 of the plate heat exchanger 7 through the heating pipe 93 for heat exchange to continue secondary heating of the tap water. In this way, the tap water is heated twice, which can make full use of the waste heat of the combustion chamber 6, save resources, improve the heating efficiency of the gas heating hot water furnace, and is conducive to realizing the multi-branch expansion of tap water.

[0042] In some other embodiments of the present application, the water inlet valve assembly 8 is connected to the main pipe 91 through a make-up water pipe to supplement water to the heating circulation water circuit.

[0043] In some embodiments of the present application, the gas heating hot water furnace includes a smoke exhaust pipe 64.

[0044] The smoke exhaust pipe 64 is provided on the housing 9 and is in communication with the air outlet of the combustion chamber 6. The pre-heat exchanger 63 is provided in the smoke exhaust pipe 64.

[0045] Specifically, the flue gas generated by the combustion of the burner 61 in the combustion chamber 6 will be discharged through the smoke exhaust pipe 64. The temperature of the flue gas is relatively high. By providing the pre-heat exchanger 63 in the smoke exhaust pipe 64, the high-temperature flue gas can heat the pre-heat exchanger 63, making full use of the heat in the flue gas, which is conducive to improving the heating efficiency of the gas heating hot water furnace.

[0046] Combined with Figure 2 As shown, in some embodiments of the present application, the water inlet valve assembly 8 includes a valve body 1. A water inlet flow channel 111 is formed inside the valve body 1. One end of the water inlet flow channel 111 is connected to a domestic water inlet 112, and the domestic water inlet 112 is connected to the tap water supply end. The other end of the water inlet flow channel 111 is connected to a domestic water drain 113. The valve body 1 is also provided with a domestic water return port 114 and a domestic water outlet 115. The domestic water return port 114 is in communication with the domestic water outlet 115. The domestic water outlet 115 is connected to the heated end 72 of the plate heat exchanger 7 through the heating pipe 93. The domestic water drain and the domestic water return port are respectively connected to both ends of the pre-heat exchange pipe 92. The domestic water outlet is used to connect to the heated end 72 of the plate heat exchanger 7 inside the gas heating hot water furnace. Among them, heat exchange is carried out between the domestic water drain 113 and the domestic water return port 114 through the pre-heat exchange pipe 92 and the pre-heat exchanger inside the gas heating hot water furnace to pre-heat the domestic water in the pipe.

[0047] Specifically, the valve body 1 is made by injection molding process or die-casting process of metal.

[0048] Specifically, by providing four connection ports on the valve body 1, namely the domestic water inlet 112, the domestic water drain outlet 113, the domestic water return port 114 and the domestic water outlet 115, the tap water entering the valve body 1 can be preheated and then re-enter the valve body 1, and finally enter the plate heat exchanger 7 from the valve body 1 for secondary heating.

[0049] Specifically, by providing a water inlet flow channel 111 inside the valve body 1, one end of the water inlet flow channel 111 is connected to the domestic water inlet 112, and the other end is connected to the domestic water drain outlet 113. The tap water enters the valve body 1 from the domestic water inlet 112, flows through the water inlet flow channel 111 and is discharged from the domestic water drain outlet 113. The valve body 1 is also provided with a connected domestic water return port 114 and a domestic water outlet 115. The domestic water drain outlet 113 and the domestic water return port 114 are connected in series through a pre-heat exchange pipeline 92 and a pre-heat exchanger 63. After the tap water is preheated by the pre-heat exchanger 63, it flows back into the valve body 1 from the domestic water return port 114; the domestic water outlet 115 is connected to the domestic water return port 114, and the domestic water outlet 115 is connected to the heated end of the plate heat exchanger 7 in the gas heating hot water boiler through a heating pipeline 93, so that the preheated tap water continues to enter the plate heat exchanger 7 for heating to provide hot water for users; it expands the path for tap water to enter the gas heating hot water boiler, which is beneficial to realizing the multi-branch expansion of tap water; at the same time, it makes full use of resources and is beneficial to improving the heating efficiency of the gas heating hot water boiler.

[0050] Combined with Figure 2 and Figure 3 As shown, in some embodiments of the present application, the domestic water drain outlet 113 and the domestic water return port 114 are arranged side by side.

[0051] Specifically, by arranging the domestic water drain outlet 113 and the domestic water return port 114 side by side, the structure of the valve body 1 can be made more compact, the occupied space of the valve body 1 can be reduced, and it is convenient for processing and manufacturing.

[0052] Combined with Figure 2 As shown, in some embodiments of the present application, the water inlet valve assembly 8 further includes a first temperature sensor 2.

[0053] The first temperature sensor 2 is arranged on the valve body 1, the first temperature sensor 2 extends into the water inlet flow channel 111, and the first temperature sensor 2 is configured to detect the water temperature in the water inlet flow channel 111.

[0054] Specifically, by providing the first temperature sensor 2 on the valve body 1, the first temperature sensor 2 can detect the water temperature in the water inlet flow channel 111, which is convenient for collecting the temperature data of the tap water.

[0055] In some embodiments of the present application, the water inlet valve assembly 8 further includes a water flow sensor 3. The water flow sensor 3 is disposed on the valve body 1 and extends into the water inlet flow channel 111. The water flow sensor 3 is configured to detect the water flow rate in the water inlet flow channel 111.

[0056] Specifically, by disposing the water flow sensor 3 on the valve body 1, the water flow sensor 3 can detect the water flow rate in the water inlet flow channel 111, facilitating the collection of water flow rate data.

[0057] In some embodiments of the present application, the water inlet valve assembly 8 further includes a second temperature sensor 4. The second temperature sensor 4 is disposed on the valve body 1 and extends into the domestic water outlet 115. The second temperature sensor 4 is configured to detect the water temperature at the domestic water outlet 115.

[0058] Specifically, by disposing the second temperature sensor 4 on the valve body 1, the second temperature sensor 4 can detect the water temperature at the domestic water outlet 115, facilitating the collection of temperature data of the preheated tap water.

[0059] In some embodiments of the present application, in combination Figure 4 and Figure 7 As shown, an intermediate flow channel 116 and a make-up water flow channel 117 are further formed in the valve body 1. One end of the intermediate flow channel 116 is communicated with the water inlet flow channel 111, and the other end of the intermediate flow channel 116 is communicated with the make-up water flow channel 117 through a make-up water port 118; a heating water inlet 119 and a heating water outlet 120 which are communicated with each other are further provided on the valve body 1. The heating water inlet 119 is connected to the heating end 71 of the plate heat exchanger 7, and the heating water inlet 119 and the heating water outlet 120 are communicated with the make-up water flow channel 117.

[0060] Specifically, by disposing the intermediate flow channel 116 and the make-up water flow channel 117 in the valve body 1, the intermediate flow channel 116 connects the water inlet flow channel 111 and the make-up water flow channel 117; the heating water inlet 119 is connected to the heating end 71 of the plate heat exchanger 7, and the heating water inlet 119 and the heating water outlet 120 are communicated with the make-up water flow channel 117. In this way, the water inlet flow channel 111, the intermediate flow channel 116, and the make-up water flow channel 117 are sequentially communicated. When the heating system is first installed or leaks, it is convenient for the valve body 1 to replenish water to the heating pipeline system.

[0061] In some embodiments of the present application, in combination Figure 5 As shown, the heating water inlet 119 and the domestic water outlet 115 are arranged side by side.

[0062] Specifically, by arranging the heating water inlet 119 and the domestic water outlet 115 side by side, the structural regularity of the valve body 11 is improved. Among them, the heating water inlet 119 is connected to the heating end 71 of the plate heat exchanger 7, and the domestic water outlet 115 is connected to the heated end 72 of the plate heat exchanger 7. The domestic water and the heating water exchange heat in the plate heat exchanger 7, which facilitates the connection between the valve body 1 and the plate heat exchanger 7.

[0063] Combined with Figure 4 As shown, in some embodiments of the present application, a joint 121 is provided at a position on the valve body 1 corresponding to the water replenishing port 118. The joint 121 is communicated with the water replenishing flow channel 117, and the joint 121 is communicated with the intermediate flow channel 116 through the water replenishing port 118; the water inlet valve assembly 8 further includes a water replenishing rod assembly 5; The water replenishing rod assembly 5 is threadedly connected to the joint 121, and the end of the water replenishing rod assembly 5 extends into the valve body 1. When the water replenishing rod assembly 5 is rotated, the water replenishing rod assembly 5 opens or blocks the water replenishing port 118.

[0064] Specifically, by providing a joint 121 at a position on the valve body 1 corresponding to the water replenishing port 118 and providing a water replenishing rod assembly 5 on the joint 121; among them, the joint 121 is communicated with the water replenishing flow channel 117 and the intermediate flow channel 116; the end of the water replenishing rod assembly 5 extends into the valve body 1 and is threadedly connected to the joint 121. When the water replenishing rod assembly 5 is rotated, the water replenishing rod assembly 5 opens or blocks the water replenishing port 118. By controlling the water replenishing rod assembly 5, it is convenient to control the opening and closing of the water replenishing port 118.

[0065] Combined with Figure 4 and Figure 7 As shown, in some embodiments of the present application, the water replenishing flow channel 117 is arranged around the outside of the intermediate flow channel 116.

[0066] Specifically, by arranging the water replenishing flow channel 117 around the outside of the intermediate flow channel 116, it is beneficial to reduce the occupied space and make the structure of the valve body 1 more compact.

[0067] Combined with Figure 4 As shown, in some other embodiments of the present application, the water replenishing rod assembly 5 includes a connecting member 51 and a rod core 52. The connecting member 51 is threadedly connected to the joint 121. In order to improve the sealing performance between the connecting member 51 and the joint 121, a third groove is formed on the outer peripheral surface of the connecting member 51, and a third sealing ring 511 is provided in the third groove. The third sealing ring 511 is used to seal the gap between the connecting member 51 and the joint 121; the connecting member 51 and the rod core 52 are threadedly connected. In order to improve the sealing performance between the rod core 52 and the connecting member 51, a fourth groove is formed on the outer peripheral surface of the rod core 52, and a fourth sealing ring 521 is provided in the fourth groove. The fourth sealing ring 521 is used to seal the gap between the rod core 52 and the connecting member 51.

[0068] In some embodiments of the present application, a guiding column 53 is provided at the top end of the rod core 52. The guiding column 53 is adapted to the water replenishing port 118. By moving the rod core 52, the guiding column 53 can open or block the water replenishing port 118. A fifth groove is formed at the connection between the guiding column 53 and the rod core 52, and a fifth sealing ring 531 is provided in the fifth groove. The fifth sealing ring 531 is used to seal the gap between the guiding column 53 and the water replenishing port 118.

[0069] Specifically, in combination with Figure 6 As shown, in order to facilitate turning the rod core 52, a knob 522 is provided at the free end of the rod core 52.

[0070] In combination with Figure 4 and Figure 7 As shown, in some embodiments of the present application, the valve body 1 includes a valve body 11 and an elbow head 12. The elbow head 12 is in an L shape and includes a first end 122 and a second end 123. The first end 122 is connected to the valve body 11, and the second end 123 is located outside the valve body 11. A joint 121 is provided at the second end 123.

[0071] A first groove is provided on the outer peripheral surface of the first end 122, and a first sealing ring 1221 is provided in the first groove. The first sealing ring 1221 is used to seal the gap between the first end 122 and the valve body 11 to prevent water leakage in the water replenishing flow channel 117.

[0072] The first end 122 is in the form of a sleeve and includes an inner tube 1222 and an outer tube 1223. The outer tube 1223 is disposed around the outside of the inner tube 1222. The inner tube 1222 and the outer tube 1223 are coaxially arranged, and the length of the inner tube 1222 is greater than the length of the outer tube 1223. The end of the inner tube 1222 extends into the valve body 11 and is communicated with the water inlet flow channel 111 in the valve body 11.

[0073] An intermediate flow channel 116 is formed in the inner tube 1222, and a water replenishing flow channel 117 is formed between the inner tube 1222 and the outer tube 1223. The inner tube 1222 and the outer tube 1223 are communicated through the water replenishing port 118.

[0074] A second groove is provided on the outer peripheral surface of the inner tube 1222, and a second sealing ring 1224 is provided in the second groove. The second sealing ring 1224 is used to seal the gap between the inner tube 1222 and the valve body 11 to prevent water leakage. In order to ensure the connection between the valve body 11 and the elbow head 12, the hole at the connection between the valve body 11 and the elbow head 12 is a stepped hole.

[0075] In some other embodiments of the present application, the gas-fired heating and hot water boiler further includes a circulation pump 94.

[0076] The circulation pump 94 is arranged on the main pipeline 91, and the circulation pump 94 provides power support for the heating circulation water circuit.

[0077] In some embodiments of the present application, the gas heating water heater further includes an expansion tank 95.

[0078] The expansion tank 95 is arranged on the main pipeline 91, and the expansion tank 95 is configured to balance the internal pressure of the heating circulation water circuit.

[0079] Specifically, by arranging the expansion tank 95 on the main pipeline 91, the expansion tank 95 can balance the internal pressure of the heating circulation water circuit and ensure the safety of the heating circulation water circuit.

[0080] In some embodiments of the present application, the hot water terminal includes a faucet and / or a shower head. It can be understood that the hot water terminal includes but is not limited to a faucet and a shower head.

[0081] In a second aspect, the embodiments of the present disclosure provide a usage method of a gas heating water heater as described in any one of the embodiments of the first aspect above, including a hot water mode and a water replenishment mode; In the hot water mode, tap water enters the water inlet flow path from the domestic water inlet on the valve body of the water inlet valve assembly, is discharged from the domestic water drain outlet, and the discharged water enters the pre-heat exchanger through the pre-heat exchange pipeline 92 for pre-heating. The pre-heated water flows back to the water inlet valve assembly through the domestic water return port and enters the heated end of the plate heat exchanger from the domestic water outlet to provide domestic hot water for the hot water terminal; In the water replenishment mode, the water replenishment port is opened, tap water enters from the domestic water inlet of the water inlet valve assembly, passes through the intermediate flow path and then enters the water replenishment flow path from the water replenishment port, and enters the heating circulation water circuit through the water replenishment flow path for water replenishment.

[0082] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. A gas-fired heating and hot water boiler, characterized in that, Comprising: A housing, within which a combustion chamber is formed; A main heat exchanger, which is disposed in the combustion chamber; A plate heat exchanger; An inlet valve assembly; A pre-heat exchanger, which is configured to utilize the waste heat of the combustion chamber to heat the water flowing through the inlet valve assembly; Wherein, the heating ends of the main heat exchanger and the plate heat exchanger are connected through a main pipeline to form a heating circulation water path; the inlet valve assembly and the pre-heat exchanger are connected through a pre-heat exchange pipeline to form a pre-heat exchange water path; the inlet valve assembly, the heated end of the plate heat exchanger, and the hot water terminal are connected through a heating pipeline to form a domestic water flow path; the pre-heat exchange water path and the domestic water flow path are connected in series through the inlet valve assembly.

2. The gas-fired heating and hot water boiler according to claim 1, characterized in that The gas-fired heating and hot water boiler comprises: An exhaust pipe, which is disposed on the housing and is connected to the gas outlet of the combustion chamber, and the pre-heat exchanger is disposed in the exhaust pipe.

3. The gas-fired heating and hot water boiler according to claim 1, characterized in that, The inlet valve assembly comprises: A valve body, within which a water inlet flow path is formed, and both ends of the water inlet flow path are respectively connected with a domestic water inlet and a domestic water drain, and the domestic water inlet is connected to the tap water supply end; The valve body is further provided with a connected domestic water return port and a domestic water outlet, the domestic water outlet is connected to the heated end of the plate heat exchanger through the heating pipeline, and the domestic water drain and the domestic water return port are respectively connected to both ends of the pre-heat exchange pipeline.

4. The gas-fired heating and hot water boiler according to claim 3, characterized in that, An intermediate flow path and a make-up water flow path are further formed in the valve body, one end of the intermediate flow path is connected to the water inlet flow path, and the other end of the intermediate flow path is connected to the make-up water flow path through a make-up water port; the valve body is further provided with a connected heating water inlet and a heating water outlet, the heating water inlet is connected to the heating end of the plate heat exchanger, and the heating water inlet, the heating water outlet are connected to the make-up water flow path.

5. The gas-fired heating and hot water boiler according to claim 4, characterized in that A joint is disposed at a position corresponding to the make-up water port on the valve body, the joint is connected to the make-up water flow path, and the joint is connected to the intermediate flow path through the make-up water port; the inlet valve assembly further comprises: A make-up water rod assembly, which is threadedly connected to the joint, and the end of the make-up water rod assembly extends into the valve body. When the make-up water rod assembly is rotated, the make-up water rod assembly opens or blocks the make-up water port.

6. The gas-fired heating and hot water boiler according to claim 4, characterized in that, The make-up water flow path is disposed around the outside of the intermediate flow path.

7. The gas-fired heating and hot water boiler according to claim 1, characterized in that, The gas-fired heating and hot water boiler further comprises: A circulation pump, which is disposed in the main pipeline.

8. The gas-fired heating and hot water boiler according to claim 1, characterized in that The gas-fired heating and hot water boiler further comprises: An expansion tank, which is disposed in the main pipeline, and the expansion tank is configured to balance the internal pressure of the heating circulation water path.

9. The gas-fired heating and hot water boiler according to claim 1, characterized in that, The hot water terminal includes a faucet and / or a shower head.

10. A method for using a gas heating and hot water boiler according to any one of claims 1 to 9, characterized in that, Including a hot water mode and a make-up water mode; In the hot water mode, tap water enters from the domestic water inlet of the inlet valve assembly, is discharged from the domestic water drain, and enters the pre-heat exchanger through the pre-heat exchange pipeline for preheating. The preheated water flows back to the inlet valve assembly through the domestic water return port, and enters the heated end of the plate heat exchanger through the domestic water outlet for heat exchange to provide domestic hot water for the hot water terminal; In the water replenishment mode, the water replenishment port is opened, and tap water enters through the domestic water inlet of the water inlet valve assembly. After passing through the intermediate flow channel, it enters the water replenishment flow channel through the water replenishment port and enters the heating circulation water circuit through the water replenishment flow channel for water replenishment.

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